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Adari MD, Pandian BA, Gaines TA, Prasad PV, Jugulam M. Confirmation and characterization of the first case of acetolactate synthase (ALS)-inhibitor resistance in Japanese brome (Bromus japonicus) in the US. PEST MANAGEMENT SCIENCE 2024; 80:3717-3725. [PMID: 38483107 DOI: 10.1002/ps.8074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 03/07/2024] [Accepted: 03/14/2024] [Indexed: 07/06/2024]
Abstract
BACKGROUND Japanese brome (Bromus japonicus Thumb.) is one of the problematic annual weeds in winter wheat (Triticum aestivum L.) and is generally controlled by acetolactate synthase (ALS) inhibitors. Repeated use of the ALS inhibitor propoxycarbazone-Na resulted in the evolution of resistance to this herbicide in three B. japonicus populations, i.e., R1, R2, and R3 in Kansas (KS). However, the level of resistance and mechanism conferring resistance in these populations is unknown. The objectives of this research were to (i) evaluate the level of resistance to propoxycarbazone-Na in R1, R2, and R3 in comparison with a known susceptible population (S1), (ii) investigate the mechanism of resistance involved in conferring ALS-inhibitor resistance, and (iii) investigate the cross-resistance to other ALS inhibitors. RESULTS Dose-response (0 to 16x; x = 44 g ai ha-1 of propoxycarbazone-Na) assay indicated 167, 125, and 667-fold resistance in R1, R2 and R3 populations, respectively, compared to S1 population. ALS gene sequencing confirmed the mutations resulting in amino acid substitutions, i.e., Pro-197-Thr (R3, R1)/Ser (R2, R1) bestowing resistance to these ALS inhibitors. Such amino acid substitutions also showed differential cross-resistance to sulfosulfuron, mesosulfuron-methyl, pyroxsulam, and imazamox among resistant populations. Pretreatment with malathion (a cytochrome P450 enzyme-inhibitor) followed by imazamox treatment suggested cross-resistance to this herbicide possibly via metabolism only in R3 population. CONCLUSION Overall, these results confirm the first case of target-site based resistance to ALS inhibitors in B. japonicus in the US, highlighting the need for exploring herbicides with alternative modes of action to enhance weed control in winter wheat. © 2024 Society of Chemical Industry.
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Affiliation(s)
| | | | - Todd A Gaines
- Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, Colorado, USA
| | - Pv Vara Prasad
- Department of Agronomy, Kansas State University, Manhattan, Kansas, USA
| | - Mithila Jugulam
- Department of Agronomy, Kansas State University, Manhattan, Kansas, USA
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Teruya K, Oguma A, Iwabuchi S, Nishizawa K, Doh-Ura K. Improvement of anti-prion efficacy with stearoxy conjugation of hydroxypropyl methylcellulose in prion-infected mice. Carbohydr Polym 2024; 337:122163. [PMID: 38710557 DOI: 10.1016/j.carbpol.2024.122163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 04/11/2024] [Accepted: 04/12/2024] [Indexed: 05/08/2024]
Abstract
Prion diseases are fatal transmissible neurodegenerative disorders. Among known anti-prions, hydroxypropyl methylcellulose compounds (HPMCs) are unique in their chemical structure and action. They have several excellent anti-prion properties but the effectiveness depends on the prion-infected mouse model. In the present study, we investigated the effects of stearoxy-modified HPMCs on prion-infected cells and mice. Stearoxy modification improved the anti-prion efficacy of HPMCs in prion-infected cells and significantly prolonged the incubation period in a lower HPMC-responding mouse model. However, stearoxy modification showed no improvement over nonmodified HPMCs in an HPMC-responding mouse model. These results offer a new line of inquiry for use with prion-infected mice that do not respond well to HPMCs.
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Affiliation(s)
- Kenta Teruya
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.
| | - Ayumi Oguma
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.
| | - Sara Iwabuchi
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.
| | - Keiko Nishizawa
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.
| | - Katsumi Doh-Ura
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan; Faculty of Medical Science & Welfare, Tohoku Bunka Gakuen University, Sendai, Miyagi, Japan.
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3
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Buck SAJ, Talebi Z, Drabison T, Jin Y, Gibson AA, Hu P, de Bruijn P, de Ridder CMA, Stuurman D, Hu S, van Weerden WM, Koolen SLW, de Wit R, Sparreboom A, Mathijssen RHJ, Eisenmann ED. Darolutamide does not interfere with OATP-mediated uptake of docetaxel. Int J Cancer 2024; 155:314-323. [PMID: 38491867 DOI: 10.1002/ijc.34922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 01/19/2024] [Accepted: 02/12/2024] [Indexed: 03/18/2024]
Abstract
The addition of darolutamide, an androgen receptor signalling inhibitor, to therapy with docetaxel has recently been approved as a strategy to treat metastatic prostate cancer. OATP1B3 is an SLC transporter that is highly expressed in prostate cancer and is responsible for the accumulation of substrates, including docetaxel, into tumours. Given that darolutamide inhibits OATP1B3 in vitro, we sought to characterise the impact of darolutamide on docetaxel pharmacokinetics. We investigated the influence of darolutamide on OATP1B3 transport using in vitro and in vivo models. We assessed the impact of darolutamide on the tumour accumulation of docetaxel in a patient-derived xenograft (PDX) model and on an OATP1B biomarker in patients. Darolutamide inhibited OATP1B3 in vitro at concentrations higher than the reported Cmax. Consistent with these findings, in vivo studies revealed that darolutamide does not influence the pharmacokinetics of Oatp1b substrates, including docetaxel. Docetaxel accumulation in PDX tumours was not decreased in the presence of darolutamide. Metastatic prostate cancer patients had similar levels of OATP1B biomarkers, regardless of treatment with darolutamide. Consistent with a low potential to inhibit OATP1B3-mediated transport in vitro, darolutamide does not significantly impede the transport of Oatp1b substrates in vivo or in patients. Our findings support combined treatment with docetaxel and darolutamide, as no OATP1B3 transporter based drug-drug interaction was identified.
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Affiliation(s)
- Stefan A J Buck
- Department of Medical Oncology, Erasmus MC Cancer Institute, University Medical Centre Rotterdam, Rotterdam, The Netherlands
| | - Zahra Talebi
- Division of Pharmaceutics and Pharmacology, College of Pharmacy, The Ohio State University, Columbus, Ohio, USA
| | - Thomas Drabison
- Division of Pharmaceutics and Pharmacology, College of Pharmacy, The Ohio State University, Columbus, Ohio, USA
| | - Yan Jin
- Division of Pharmaceutics and Pharmacology, College of Pharmacy, The Ohio State University, Columbus, Ohio, USA
| | - Alice A Gibson
- Division of Pharmaceutics and Pharmacology, College of Pharmacy, The Ohio State University, Columbus, Ohio, USA
| | - Peng Hu
- Division of Outcomes and Translational Sciences, College of Pharmacy, The Ohio State University, Columbus, Ohio, USA
| | - Peter de Bruijn
- Department of Medical Oncology, Erasmus MC Cancer Institute, University Medical Centre Rotterdam, Rotterdam, The Netherlands
| | - Corrina M A de Ridder
- Department of Urology, Erasmus MC Cancer Institute, University Medical Centre Rotterdam, Rotterdam, The Netherlands
| | - Debra Stuurman
- Department of Urology, Erasmus MC Cancer Institute, University Medical Centre Rotterdam, Rotterdam, The Netherlands
| | - Shuiying Hu
- Division of Outcomes and Translational Sciences, College of Pharmacy, The Ohio State University, Columbus, Ohio, USA
| | - Wytske M van Weerden
- Department of Urology, Erasmus MC Cancer Institute, University Medical Centre Rotterdam, Rotterdam, The Netherlands
| | - Stijn L W Koolen
- Department of Medical Oncology, Erasmus MC Cancer Institute, University Medical Centre Rotterdam, Rotterdam, The Netherlands
| | - Ronald de Wit
- Department of Medical Oncology, Erasmus MC Cancer Institute, University Medical Centre Rotterdam, Rotterdam, The Netherlands
| | - Alex Sparreboom
- Division of Pharmaceutics and Pharmacology, College of Pharmacy, The Ohio State University, Columbus, Ohio, USA
| | - Ron H J Mathijssen
- Department of Medical Oncology, Erasmus MC Cancer Institute, University Medical Centre Rotterdam, Rotterdam, The Netherlands
| | - Eric D Eisenmann
- Division of Pharmaceutics and Pharmacology, College of Pharmacy, The Ohio State University, Columbus, Ohio, USA
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4
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Dearlove EL, Chandler D, Edgington S, Berry SD, Martin G, Svendsen C, Hesketh H. Improved control of Trialeurodes vaporariorum using mixture combinations of entomopathogenic fungi and the chemical insecticide spiromesifen. Sci Rep 2024; 14:15259. [PMID: 38956259 PMCID: PMC11219850 DOI: 10.1038/s41598-024-66051-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 06/26/2024] [Indexed: 07/04/2024] Open
Abstract
Greenhouse whitefly (Trialeurodes vaporariorum) is a major global pest, causing direct damage to plants and transmitting viral plant diseases. Management of T. vaporariorum is problematic because of widespread pesticide resistance, and many greenhouse growers rely on biological control agents to regulate T. vaporariorum populations. However, these are often slow and vary in efficacy, leading to subsequent application of chemical insecticides when pest populations exceed threshold levels. Combining chemical and biological pesticides has great potential but can result in different outcomes, from positive to negative interactions. In this study, we evaluated co-applications of the entomopathogenic fungi (EPF) Beauveria bassiana and Cordyceps farinosa and the chemical insecticide spiromesifen in laboratory bioassays. Complex interactions between the EPFs and insecticide were described using an ecotoxicological mixtures model, the MixTox analysis. Depending on the EPF and chemical concentrations applied, mixtures resulted in additivity, synergism, or antagonism in terms of total whitefly mortality. Combinations of B. bassiana and spiromesifen, compared to single treatments, increased the rate of kill by 5 days. Results indicate the potential for combined applications of EPF and spiromesifen as an effective integrated pest management strategy and demonstrate the applicability of the MixTox model to describe complex mixture interactions.
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Affiliation(s)
- Eleanor L Dearlove
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK.
- RSK ADAS Ltd. ADAS Gleadthorpe, Meden Vale, Mansfield, NG20 9PD, UK.
| | - David Chandler
- Warwick Crop Centre, School of Life Sciences, Wellesbourne Campus, The University of Warwick, Warwick, UK
| | | | | | | | - Claus Svendsen
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK
| | - Helen Hesketh
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK.
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de Farias NO, Rodrigues AR, Botelho MT, Magalhães GR, Räisänen R, Freeman HS, Umbuzeiro GDA. The natural anthraquinone dye emodin: Eco/genotoxicological characterization for aquatic organisms. Food Chem Toxicol 2024; 189:114749. [PMID: 38768938 DOI: 10.1016/j.fct.2024.114749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 05/16/2024] [Accepted: 05/17/2024] [Indexed: 05/22/2024]
Abstract
Emodin is an anthraquinone secondary metabolite produced by several species of plants and fungi. Emodin is known for its pharmacological versatility, and, in the textile industry, for its good dyeing properties. However, its use in the textile industry can result in the formation and disposal of large volumes of wastewater. Emodin mutagenicity has been shown in bacteria and in human cells, but little is known about its possible toxic, genotoxic, or mutagenic effects in aquatic organisms. We have evaluated the eco/genotoxicity of emodin to aquatic organisms. Emodin was toxic to Daphnia similis (EC50 = 130 μg L-1) and zebrafish embryos (LC50 = 25 μg L-1). No toxicity was observed for Raphidocelis subcapitata, Ceriodaphnia dubia, or Parhyale hawaiensis. Additional biochemistry/molecular studies are needed to elucidate the toxic/mutagenic pathways of emodin in aquatic organisms. The PNEC value for emodin was 0.025 μg L-1. In addition to mutagenicity in the Salmonella/microsome assay, emodin was mutagenic in the micronucleus assay in the amphipod P. hawaiensis. Among the anthraquinone dyes tested to date, natural or synthetic, emodin was the most toxic to aquatic species.
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Affiliation(s)
- Natália Oliveira de Farias
- Faculdade de Tecnologia, Universidade Estadual de Campinas, UNICAMP, Limeira, SP, Brazil; Instituto de Biologia, Universidade Estadual de Campinas, UNICAMP, Campinas, SP, Brazil
| | - Amanda Rocha Rodrigues
- Faculdade de Tecnologia, Universidade Estadual de Campinas, UNICAMP, Limeira, SP, Brazil
| | - Marina Tenório Botelho
- Faculdade de Tecnologia, Universidade Estadual de Campinas, UNICAMP, Limeira, SP, Brazil
| | | | - Riikka Räisänen
- Helsinki Institute of Sustainability Science, Craft Studies, University of Helsinki, UH, Helsinki, Finland
| | - Harold S Freeman
- Wilson College of Textiles, North Carolina State University, NCSU, Raleigh, USA
| | - Gisela de Aragão Umbuzeiro
- Faculdade de Tecnologia, Universidade Estadual de Campinas, UNICAMP, Limeira, SP, Brazil; Instituto de Biologia, Universidade Estadual de Campinas, UNICAMP, Campinas, SP, Brazil.
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6
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Philibert D, Stanton RS, Tang C, Stock NL, Benfey T, Pirrung M, de Jourdan B. The lethal and sublethal impacts of two tire rubber-derived chemicals on brook trout (Salvelinus fontinalis) fry and fingerlings. CHEMOSPHERE 2024; 360:142319. [PMID: 38735497 DOI: 10.1016/j.chemosphere.2024.142319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 05/07/2024] [Accepted: 05/09/2024] [Indexed: 05/14/2024]
Abstract
Recent toxicity studies of stormwater runoff implicated N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine-quinone (6PPD-quinone) as the contaminant responsible for the mass mortality of coho salmon (Oncorhynchus kisutch). In the wake of this discovery, 6PPD-quinone has been measured in waterways around urban centers, along with other tire wear leachates like hexamethoxymethylmelamine (HMMM). The limited data available for 6PPD-quinone have shown toxicity can vary depending on the species. In this study we compared the acute toxicity of 6PPD-quinone and HMMM to Brook trout (Salvelinus fontinalis) fry and fingerlings. Our results show that fry are ∼3 times more sensitive to 6PPD-quinone than fingerlings. Exposure to HMMM ≤6.6 mg/L had no impact on fry survival. These results highlight the importance of conducting toxicity tests on multiple life stages of fish species, and that relying on fingerling life stages for species-based risk assessment may underestimate the impacts of exposure. 6PPD-quinone also had many sublethal effects on Brook trout fingerlings, such as increased interlamellar cell mass (ILCM) size, hematocrit, blood glucose, total CO2, and decreased blood sodium and chloride concentrations. Linear relationships between ILCM size and select blood parameters support the conclusion that 6PPD-quinone toxicity is an outcome of osmorespiratory challenges imposed by gill impairment.
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Affiliation(s)
| | | | | | - Naomi L Stock
- Water Quality Centre, Trent University, Peterborough, ON, Canada
| | - Tillmann Benfey
- Department of Biology, University of New Brunswick, Fredericton, NB, Canada
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7
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Warfvinge CF, Gustafsson J, Roth D, Tennvall J, Svensson J, Bernhardt P, Åkesson A, Wieslander E, Sundlöv A, Sjögreen Gleisner K. Relationship Between Absorbed Dose and Response in Neuroendocrine Tumors Treated with [ 177Lu]Lu-DOTATATE. J Nucl Med 2024; 65:1070-1075. [PMID: 38724277 DOI: 10.2967/jnumed.123.266991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 03/26/2024] [Indexed: 07/03/2024] Open
Abstract
Peptide receptor radionuclide therapy presents the possibility of tracing and quantifying the uptake of the drug in the body and performing dosimetry, potentially allowing individualization of treatment schemes. However, the details of how neuroendocrine tumors (NETs) respond to different absorbed doses are insufficiently known. Here, we investigated the relationship between tumor-absorbed dose and tumor response in a cohort of patients with NETs treated with [177Lu]Lu-DOTATATE. Methods: This was a retrospective study based on 69 tumors in 32 patients treated within a clinical trial. Dosimetry was performed at each cycle of [177Lu]Lu-DOTATATE, rendering 366 individual absorbed dose assessments. Hybrid planar-SPECT/CT imaging using [177Lu]Lu-DOTATATE was used, including quantitative SPECT reconstruction, voxel-based absorbed dose rate calculation, semiautomatic image segmentation, and partial-volume correction. Changes in tumor volume were used to determine tumor response. The volume for each tumor was manually delineated on consecutive CT scans, giving a total of 712 individual tumor volume assessments. Tumors were stratified according to grade. The relationship between absorbed dose and response was investigated using mixed-effects models and logistic regression. Tumors smaller than 4 cm3 were excluded. Results: In grade 2 NETs, a clear relationship between absorbed dose and volume reduction was observed. Our observations suggest a 90% probability of partial tumor response for an accumulated tumor-absorbed dose of at least 135 Gy. Conclusion: Our findings are in accordance with previous observations regarding the relationship between tumor shrinkage and absorbed dose. Moreover, our data suggest an absorbed dose threshold for partial response in grade 2 NETs. These observations provide valuable insights for the design of dosimetry-guided peptide receptor radionuclide therapy schemes.
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Affiliation(s)
- Carl Fredrik Warfvinge
- Department of Hematology, Oncology, and Radiation Physics, Skåne University Hospital, Lund, Sweden;
- Division of Oncology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | | | - Daniel Roth
- Medical Radiation Physics, Lund University, Lund, Sweden
| | - Jan Tennvall
- Division of Oncology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Johanna Svensson
- Department of Oncology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Peter Bernhardt
- Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; and
| | - Anna Åkesson
- Clinical Studies Sweden, Forum South, Skåne University Hospital, Lund, Sweden
| | - Elinore Wieslander
- Department of Hematology, Oncology, and Radiation Physics, Skåne University Hospital, Lund, Sweden
| | - Anna Sundlöv
- Division of Oncology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
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8
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Green SL, Silvester E, Dworkin S, Shakya M, Klein A, Lowe R, Datta K, Holland A. Molecular variations to the proteome of zebrafish larvae induced by environmentally relevant copper concentrations. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2024; 272:106963. [PMID: 38776608 DOI: 10.1016/j.aquatox.2024.106963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2024] [Revised: 05/14/2024] [Accepted: 05/16/2024] [Indexed: 05/25/2024]
Abstract
Contaminants are increasingly accumulating in aquatic environments and biota, with potential adverse effects on individual organisms, communities and ecosystems. However, studies that explore the molecular changes in fish caused by environmentally relevant concentrations of metals, such as copper (Cu), are limited. This study uses embryos of the model organism zebrafish (Danio rerio) to investigate effect of Cu on the proteome and amino acid (AA) composition of fish. Wild-type embryos at 24 h post-fertilisation were exposed to Cu (2 µg L-1 to 120 µg L-1) for 96 h and the number of healthy larvae were determined based on larvae that had hatched and did not display loss of equilibrium (LOE). The effect concentrations where Cu caused a 10 % (EC10) or 50 % (EC50) decrease in the number of healthy larvae were calculated as 3.7 µg L-1 and 10.9 µg L-1, respectively. Proteomics analysis of embryos exposed to the EC10 and EC50 concentrations of Cu revealed the proteome to differ more strongly after 48 h than 96 h, suggesting the acclimatisation of some larvae. Exposure to excess Cu caused differentially expressed proteins (DEPs) involved in oxidative stress, mitochondrial respiration, and neural transduction as well as the modulation of the AAs (Proline, Glycine and Alanine). This is the first study to suggest that LOE displayed by Cu-stressed fish may involve the disruption to GABAergic proteins and the calcium-dependent inhibitory neurotransmitter GABA. Moreover, this study highlights that proteomics and AA analysis can be used to identify potential biomarkers for environmental monitoring.
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Affiliation(s)
- Sarah L Green
- Department of Environment and Genetics, La Trobe University, 133 Mckoy Street, West Wodonga, Albury-Wodonga Campus, Victoria 3690, Australia.
| | - Ewen Silvester
- Department of Environment and Genetics, La Trobe University, 133 Mckoy Street, West Wodonga, Albury-Wodonga Campus, Victoria 3690, Australia
| | - Sebastian Dworkin
- Department of Microbiology, Anatomy, Physiology and Pharmacology, La Trobe University, Bundoora Campus, Victoria, Australia
| | - Manisha Shakya
- School of Environmental and Rural Science, Faculty of Science, Agriculture, Business and Law, University of New England, Armidale, New South Wales, Australia
| | - Annaleise Klein
- Australian Synchrotron, ANSTO, 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Rohan Lowe
- Proteomics and Metabolomics Platform, La Trobe University, Bundoora Campus, Victoria, Australia
| | - Keshava Datta
- Proteomics and Metabolomics Platform, La Trobe University, Bundoora Campus, Victoria, Australia
| | - Aleicia Holland
- Department of Environment and Genetics, La Trobe University, 133 Mckoy Street, West Wodonga, Albury-Wodonga Campus, Victoria 3690, Australia
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Fajana HO, Lamb EG, Siciliano SD. A shift from individual species to ecosystem services effect: Introducing the Eco-indicator Sensitivity Distribution (EcoSD) as an ecosystem services approach to redefining the species sensitivity distribution (SSD) for soil ecological risk assessment. INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT 2024; 20:1166-1179. [PMID: 37984821 DOI: 10.1002/ieam.4868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 10/13/2023] [Accepted: 11/13/2023] [Indexed: 11/22/2023]
Abstract
Incorporating the ecosystem services (ES) approach into soil ecological risk assessment (ERA) has been advocated over the years, but implementing the approach in ERA faces some challenges. However, several researchers have made significant improvements to the soil ERA, such as applying the species sensitivity distribution (SSD) to discern chemical effects on the soil ecosystem. Despite the considerable contributions of SSD to ERA, SSD fails to relate chemical impact on individual species to ES and account for functional redundancy as well as soil ecosystem complexity. Here, we introduce the Eco-indicator Sensitivity Distribution (EcoSD). An EcoSD fits ecological functional groups and soil processes, termed "eco-indicators," instead of individual species responses to a statistical distribution. These eco-indicators are related directly to critical ecosystem functions that drive ES. We derived an EcoSD for cadmium as a model chemical and estimated a soil ecosystem protection value (EcoPVSoil) based on the eco-indicator dataset for cadmium from the literature. The EcoSD identified nitrogen cycling as the critical process disrupted by cadmium. A key advantage of EcoSD is that it identifies key ecological and chemical indicators of an ES effect. In doing so, it links chemical monitoring results to sensitive ecological functions. The estimated EcoPVSoil for cadmium was slightly more protective of the soil ecosystem than most regional soil values derived from this study's dataset and soil guideline values from the literature. Thus, EcoSD has proven to be a practical and valuable ES concept with the potential to serve as an initial step of the tiered ERA approach. Integr Environ Assess Manag 2024;20:1166-1179. © 2023 SETAC.
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Affiliation(s)
- Hamzat O Fajana
- Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
- Department of Soil Science, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Eric G Lamb
- Department of Plant Science, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Steven D Siciliano
- Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
- Department of Soil Science, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
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10
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Hollis RL, Elliott R, Dawson JC, Ilenkovan N, Matthews RM, Stillie LJ, Oswald AJ, Kim H, Llaurado Fernandez M, Churchman M, Porter JM, Roxburgh P, Unciti-Broceta A, Gershenson DM, Herrington CS, Carey MS, Carragher NO, Gourley C. High throughput screening identifies dasatinib as synergistic with trametinib in low grade serous ovarian carcinoma. Gynecol Oncol 2024; 186:42-52. [PMID: 38582027 DOI: 10.1016/j.ygyno.2024.03.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 03/26/2024] [Accepted: 03/31/2024] [Indexed: 04/08/2024]
Abstract
BACKGROUND Low grade serous ovarian carcinoma (LGSOC) is a distinct histotype of ovarian cancer characterised high levels of intrinsic chemoresistance, highlighting the urgent need for new treatments. High throughput screening in clinically-informative cell-based models represents an attractive strategy for identifying candidate treatment options for prioritisation in clinical studies. METHODS We performed a high throughput drug screen of 1610 agents across a panel of 6 LGSOC cell lines (3 RAS/RAF-mutant, 3 RAS/RAF-wildtype) to identify novel candidate therapeutic approaches. Validation comprised dose-response analysis across 9 LGSOC models and 5 high grade serous comparator lines. RESULTS 16 hits of 1610 screened compounds were prioritised for validation based on >50% reduction in nuclei counts in over half of screened cell lines at 1000 nM concentration. 11 compounds passed validation, and the four agents of greatest interest (dasatinib, tyrosine kinase inhibitor; disulfiram, aldehyde dehydrogenase inhibitor; carfilzomib, proteasome inhibitor; romidepsin, histone deacetylase inhibitor) underwent synergy profiling with the recently approved MEK inhibitor trametinib. Disulfiram demonstrated excellent selectivity for LGSOC versus high grade serous ovarian carcinoma comparator lines (P = 0.003 for IC50 comparison), while the tyrosine kinase inhibitor dasatinib demonstrated favourable synergy with trametinib across multiple LGSOC models (maximum zero interaction potency synergy score 46.9). The novel, highly selective Src family kinase (SFK) inhibitor NXP900 demonstrated a similar trametinib synergy profile to dasatinib, suggesting that SFK inhibition is the likely driver of synergy. CONCLUSION Dasatinib and other SFK inhibitors represent novel candidate treatments for LGSOC and demonstrate synergy with trametinib. Disulfiram represents an additional treatment strategy worthy of investigation.
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Affiliation(s)
- Robert L Hollis
- The Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK.
| | - Richard Elliott
- Edinburgh Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK
| | - John C Dawson
- Edinburgh Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK
| | - Narthana Ilenkovan
- The Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK; Cancer Research UK Scotland Institute, Glasgow, UK
| | - Rosie M Matthews
- The Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK
| | - Lorna J Stillie
- The Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK; Cancer Research UK Scotland Institute, Glasgow, UK
| | - Ailsa J Oswald
- The Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK
| | - Hannah Kim
- Department of Obstetrics and Gynecology, University of British Columbia, Vancouver, BC, Canada
| | | | - Michael Churchman
- The Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK
| | - Joanna M Porter
- The Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK
| | - Patricia Roxburgh
- Cancer Research UK Scotland Institute, Glasgow, UK; CRUK Scotland Centre, School of Cancer Sciences, Glasgow, UK
| | - Asier Unciti-Broceta
- Edinburgh Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK
| | - David M Gershenson
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - C Simon Herrington
- The Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK
| | - Mark S Carey
- Department of Obstetrics and Gynecology, University of British Columbia, Vancouver, BC, Canada
| | - Neil O Carragher
- Edinburgh Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK
| | - Charlie Gourley
- The Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK
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11
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Nguyen HDT, LE TM, Lee D, Cho HJ, Lee J, Sohn SK, Kim JG, Ham JY, Moon JH, Han HS, Kim J, Baek DW. Synergistic Effect of Venetoclax and Bendamustine in Early T-cell Precursor Acute Lymphoblastic Leukemia. In Vivo 2024; 38:1740-1749. [PMID: 38936885 PMCID: PMC11215584 DOI: 10.21873/invivo.13624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 04/10/2024] [Accepted: 04/11/2024] [Indexed: 06/29/2024]
Abstract
BACKGROUND/AIM To date, therapeutic options for T-cell acute lymphoblastic leukemia (T-ALL) remain very limited. This study evaluated the efficacy of monotherapies and combination therapies including a selective BCL-2 inhibitor for T-ALL cell lines, namely Jurkat, CCRF-CEM, and Loucy. MATERIALS AND METHODS Loucy is an early T-precursor ALL (ETP-ALL) cell line characterized by an immature phenotype, whereas Jurkat and CCRF-CEM are late T-cell progenitor ALL (LTP-ALL) cell lines. Monotherapy was conducted with venetoclax, cytarabine, bendamustine, or azacytidine, whereas combination therapy was performed with venetoclax plus cytarabine, venetoclax plus bendamustine, or venetoclax plus azacytidine. Cell viability assay was conducted after 48 h using Trypan blue and the 3-(4, 5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS). Statistical analysis for evaluating synergistic interactions between anticancer drugs was performed by using the SynergyFinder Plus and drc R package. RESULTS Adding venetoclax to cytarabine, bendamustine, or azacitidine achieved an additive effect, with Loewe synergic scores ranging from -10 to 10 in Jurkat and CCRF-CEM. Conversely, the combination of venetoclax and cytarabine displayed an additive effect (Loewe synergic score: 8.45 and 5.82 with MTS and Trypan blue assays, respectively), whereas venetoclax plus bendamustine or azacitidine exhibited a synergistic effect (Loewe synergic score >10 with MTS assay) in Loucy. Remarkably, the Bliss/Loewe score revealed that the combination of venetoclax and bendamustine was the most synergistic, yielding a score of 13.832±0.55. CONCLUSION The combination of venetoclax and bendamustine demonstrated the greatest synergistic effect in suppressing ETP-ALL cell proliferation. Further studies are warranted to determine the mechanisms for the synergism between venetoclax and bendamustine in high-risk T-ALL.
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Affiliation(s)
- Hong Duc Thi Nguyen
- Department of Biomedical Science, Graduate School, Kyungpook National University, Daegu, Republic of Korea
- BK21 Four Program, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Tan Minh LE
- Department of Biomedical Science, Graduate School, Kyungpook National University, Daegu, Republic of Korea
- BK21 Four Program, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Donghyeon Lee
- Department of Biomedical Science, Graduate School, Kyungpook National University, Daegu, Republic of Korea
- BK21 Four Program, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Hee Jeong Cho
- Department of Hematology/Oncology, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Jungmin Lee
- Department of Hematology/Oncology, Kyungpook National University Chilgok Hospital, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Sang Kyun Sohn
- Department of Hematology/Oncology, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Jong Gwang Kim
- Department of Hematology/Oncology, Kyungpook National University Chilgok Hospital, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Ji Yeon Ham
- Department of Laboratory Medicine, Kyungpook National University Chilgok Hospital, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Joon Ho Moon
- Department of Hematology/Oncology, Kyungpook National University Chilgok Hospital, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Hyung Soo Han
- Department of Biomedical Science, Graduate School, Kyungpook National University, Daegu, Republic of Korea
- BK21 Four Program, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Juhyung Kim
- Department of Hematology/Oncology, Kyungpook National University Chilgok Hospital, School of Medicine, Kyungpook National University, Daegu, Republic of Korea;
| | - Dong Won Baek
- Department of Hematology/Oncology, Kyungpook National University Chilgok Hospital, School of Medicine, Kyungpook National University, Daegu, Republic of Korea;
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12
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Seiboldt T, Zeiser C, Nguyen D, Celikyürekli S, Herter S, Najafi S, Stroh-Dege A, Meulenbroeks C, Mack N, Salem-Altintas R, Westermann F, Schlesner M, Milde T, Kool M, Holland-Letz T, Vogler M, Peterziel H, Witt O, Oehme I. Synergy of retinoic acid and BH3 mimetics in MYC(N)-driven embryonal nervous system tumours. Br J Cancer 2024:10.1038/s41416-024-02740-5. [PMID: 38942989 DOI: 10.1038/s41416-024-02740-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 05/14/2024] [Accepted: 05/28/2024] [Indexed: 06/30/2024] Open
Abstract
BACKGROUND Certain paediatric nervous system malignancies have dismal prognoses. Retinoic acid (RA) is used in neuroblastoma treatment, and preclinical data indicate potential benefit in selected paediatric brain tumour entities. However, limited single-agent efficacy necessitates combination treatment approaches. METHODS We performed drug sensitivity profiling of 76 clinically relevant drugs in combination with RA in 16 models (including patient-derived tumouroids) of the most common paediatric nervous system tumours. Drug responses were assessed by viability assays, high-content imaging, and apoptosis assays and RA relevant pathways by RNAseq from treated models and patient samples obtained through the precision oncology programme INFORM (n = 2288). Immunoprecipitation detected BCL-2 family interactions, and zebrafish embryo xenografts were used for in vivo efficacy testing. RESULTS Group 3 medulloblastoma (MBG3) and neuroblastoma models were highly sensitive to RA treatment. RA induced differentiation and regulated apoptotic genes. RNAseq analysis revealed high expression of BCL2L1 in MBG3 and BCL2 in neuroblastomas. Co-treatments with RA and BCL-2/XL inhibitor navitoclax synergistically decreased viability at clinically achievable concentrations. The combination of RA with navitoclax disrupted the binding of BIM to BCL-XL in MBG3 and to BCL-2 in neuroblastoma, inducing apoptosis in vitro and in vivo. CONCLUSIONS RA treatment primes MBG3 and NB cells for apoptosis, triggered by navitoclax cotreatment.
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Affiliation(s)
- Till Seiboldt
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany
- Clinical Cooperation Unit Pediatric Oncology (B310), German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), Heidelberg, Germany
- National Center for Tumor Diseases Heidelberg, Heidelberg, Germany
- Faculty of Medicine, Heidelberg University, Heidelberg, Germany
| | - Constantia Zeiser
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany
- Clinical Cooperation Unit Pediatric Oncology (B310), German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), Heidelberg, Germany
- National Center for Tumor Diseases Heidelberg, Heidelberg, Germany
- Faculty of Medicine, Heidelberg University, Heidelberg, Germany
| | - Duy Nguyen
- Bioinformatics and Omics Data Analytics, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Simay Celikyürekli
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany
- Clinical Cooperation Unit Pediatric Oncology (B310), German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), Heidelberg, Germany
- National Center for Tumor Diseases Heidelberg, Heidelberg, Germany
- Faculty of Biosciences, Heidelberg University, Heidelberg, Germany
- Department of Pediatric Oncology, Hematology, Immunology and Pulmonology, Heidelberg University Hospital, Heidelberg, Germany
| | - Sonja Herter
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany
- Clinical Cooperation Unit Pediatric Oncology (B310), German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), Heidelberg, Germany
- National Center for Tumor Diseases Heidelberg, Heidelberg, Germany
- Faculty of Biosciences, Heidelberg University, Heidelberg, Germany
| | - Sara Najafi
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany
- Clinical Cooperation Unit Pediatric Oncology (B310), German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), Heidelberg, Germany
- National Center for Tumor Diseases Heidelberg, Heidelberg, Germany
- Department of Pediatric Oncology, Hematology, Immunology and Pulmonology, Heidelberg University Hospital, Heidelberg, Germany
| | - Alexandra Stroh-Dege
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany
- Clinical Cooperation Unit Pediatric Oncology (B310), German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), Heidelberg, Germany
- National Center for Tumor Diseases Heidelberg, Heidelberg, Germany
| | | | - Norman Mack
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany
- National Center for Tumor Diseases Heidelberg, Heidelberg, Germany
- Division of Pediatric Neurooncology, German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), Heidelberg, Germany
| | - Rabia Salem-Altintas
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany
- Clinical Cooperation Unit Pediatric Oncology (B310), German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), Heidelberg, Germany
- National Center for Tumor Diseases Heidelberg, Heidelberg, Germany
- Faculty of Medicine, Heidelberg University, Heidelberg, Germany
| | - Frank Westermann
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany
- National Center for Tumor Diseases Heidelberg, Heidelberg, Germany
- Division of Neuroblastoma Genomics, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Matthias Schlesner
- Bioinformatics and Omics Data Analytics, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Biomedical Informatics, Data Mining and Data Analytics, Faculty of Applied Computer Science and Medical Faculty, University of Augsburg, Augsburg, Germany
| | - Till Milde
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany
- Clinical Cooperation Unit Pediatric Oncology (B310), German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), Heidelberg, Germany
- National Center for Tumor Diseases Heidelberg, Heidelberg, Germany
- Department of Pediatric Oncology, Hematology, Immunology and Pulmonology, Heidelberg University Hospital, Heidelberg, Germany
| | - Marcel Kool
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany
- National Center for Tumor Diseases Heidelberg, Heidelberg, Germany
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Division of Pediatric Neurooncology, German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), Heidelberg, Germany
- University Medical Center Utrecht, Utrecht, the Netherlands
| | - Tim Holland-Letz
- Division of Biostatistics, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Meike Vogler
- Institute for Experimental Pediatric Hematology and Oncology, Goethe-University Frankfurt, Frankfurt, Germany
- German Cancer Consortium (DKTK) partner site Frankfurt/Mainz, a partnership between DKFZ and University Hospital Frankfurt, Frankfurt, Germany
- University Cancer Center Frankfurt (UCT), University Hospital Frankfurt, Goethe-University Frankfurt, Frankfurt, Germany
| | - Heike Peterziel
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany
- Clinical Cooperation Unit Pediatric Oncology (B310), German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), Heidelberg, Germany
- National Center for Tumor Diseases Heidelberg, Heidelberg, Germany
| | - Olaf Witt
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany
- Clinical Cooperation Unit Pediatric Oncology (B310), German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), Heidelberg, Germany
- National Center for Tumor Diseases Heidelberg, Heidelberg, Germany
- Department of Pediatric Oncology, Hematology, Immunology and Pulmonology, Heidelberg University Hospital, Heidelberg, Germany
| | - Ina Oehme
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany.
- Clinical Cooperation Unit Pediatric Oncology (B310), German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), Heidelberg, Germany.
- National Center for Tumor Diseases Heidelberg, Heidelberg, Germany.
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13
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Vaze KM, Manoli G, Helfrich-Förster C. Characterization of pre-diapause phase in the northern Drosophila species D. ezoana. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2024:10.1007/s00359-024-01707-4. [PMID: 38916659 DOI: 10.1007/s00359-024-01707-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 06/06/2024] [Accepted: 06/10/2024] [Indexed: 06/26/2024]
Abstract
Drosophila ezoana is a virilis group Drosophila species inhabiting northern latitudes. The flies enter adult reproductive diapause to survive winter upon exposure to short photoperiod conditions (short-day) over several consecutive days. Insect pre-diapause phase - the duration between the beginning of exposure to short days and expression of diapause is thought to be comprised of two distinct phases - (a) photoperiodic time measurement that detects short-days, followed by (b) physiological events leading to the expression of diapause phenotype. A short-day dependent segment of the pre-diapause phase thus approximates the process of photoperiodic time measurement. Continuous darkness has been found to be a neutral condition with respect to diapause regulation in many insect species. The effect of variable number of short-days followed by continuous darkness on diapause incidence thus allows identification of short-day dependent segment of pre-diapause phase thereby mapping the process of photo-periodic time measurement. Although, few weeks of exposure to short-days in adult stage is known to be sufficient for the expression of diapause in D. ezoana, the number of short days required for the completion of photo-periodic time measurement has never been systematically analysed. Our experiments show that continuous darkness is a neutral condition for diapause regulation also in D. ezoana. We utilized the neutral nature of continuous darkness to map the process of photoperiodic time measurement in the D. ezoana strain 124OJ8 which showed that integration of short-day photic cues over the first 10 days of pre-diapause phase is essential for diapause induction.
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Affiliation(s)
- Koustubh M Vaze
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan, USA.
| | - Giulia Manoli
- Neurobiology and Genetics, Theodor-Boveri Institute, Biocenter, University of Würzburg, Würzburg, Germany
| | - Charlotte Helfrich-Förster
- Neurobiology and Genetics, Theodor-Boveri Institute, Biocenter, University of Würzburg, Würzburg, Germany
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14
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Popović L, Rossner MJ, Wehr MC. Protocol for identifying properties of ERBB receptor antagonists using the barcoded ERBBprofiler assay. STAR Protoc 2024; 5:102987. [PMID: 38635397 PMCID: PMC11043852 DOI: 10.1016/j.xpro.2024.102987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 02/07/2024] [Accepted: 03/12/2024] [Indexed: 04/20/2024] Open
Abstract
The ERBBprofiler assay measures compound effects on ERBB family receptors and key downstream signaling pathways that are implicated in cancer or other complex diseases. Here, we present a protocol for identifying properties of ERBB receptor antagonists using the barcoded ERBBprofiler assay. We describe steps for in-solution transfection, cell treatment, combined processing of samples, amplification and indexing of PCRs, sequencing, and data analysis. This approach allows for the simultaneous assessment of drug effects and cell-type-dependent effects. For complete details on the use and execution of this protocol, please refer to Popović et al.1.
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Affiliation(s)
- Lukša Popović
- Research Group Cell Signalling, Department of Psychiatry and Psychotherapy, LMU University Hospital, LMU Munich, Nussbaumstr. 7, 80336 Munich, Germany; Systasy Bioscience GmbH, Balanstr. 6, 81669 Munich, Germany
| | - Moritz J Rossner
- Systasy Bioscience GmbH, Balanstr. 6, 81669 Munich, Germany; Section of Molecular Neurobiology, Department of Psychiatry and Psychotherapy, LMU University Hospital, LMU Munich, Nussbaumstr. 7, 80336 Munich, Germany
| | - Michael C Wehr
- Research Group Cell Signalling, Department of Psychiatry and Psychotherapy, LMU University Hospital, LMU Munich, Nussbaumstr. 7, 80336 Munich, Germany; Systasy Bioscience GmbH, Balanstr. 6, 81669 Munich, Germany.
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15
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Kumar R, Oke A, Rockmill B, de Cruz M, Verduzco R, Shodhan A, Woodruff-Madeira X, Abrahamsson DP, Varshavsky J, Lam J, Robinson JF, Allard P, Woodruff TJ, Fung JC. Rapid identification of reproductive toxicants among environmental chemicals using an in vivo evaluation of gametogenesis in budding yeast Saccharomyces cerevisiae. Reprod Toxicol 2024; 128:108630. [PMID: 38906490 DOI: 10.1016/j.reprotox.2024.108630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 05/26/2024] [Accepted: 05/31/2024] [Indexed: 06/23/2024]
Abstract
Infertility affects ∼12 % of couples, with environmental chemical exposure as a potential contributor. Of the chemicals that are actively manufactured, very few are assessed for reproductive health effects. Rodents are commonly used to evaluate reproductive effects, which is both costly and time consuming. Thus, there is a pressing need for rapid methods to test a broader range of chemicals. Here, we developed a strategy to evaluate large numbers of chemicals for reproductive toxicity via a yeast, S. cerevisiae high-throughput assay to assess gametogenesis as a potential new approach method (NAM). By simultaneously assessing chemicals for growth effects, we can distinguish if a chemical affects gametogenesis only, proliferative growth only or both. We identified a well-known mammalian reproductive toxicant, bisphenol A (BPA) and ranked 19 BPA analogs for reproductive harm. By testing mixtures of BPA and its analogs, we found that BPE and 17 β-estradiol each together with BPA showed synergistic effects that worsened reproductive outcome. We examined an additional 179 environmental chemicals including phthalates, pesticides, quaternary ammonium compounds and per- and polyfluoroalkyl substances and found 57 with reproductive effects. Many of the chemicals were found to be strong reproductive toxicants that have yet to be tested in mammals. Chemicals having affect before meiosis I division vs. meiosis II division were identified for 16 gametogenesis-specific chemicals. Finally, we demonstrate that in general yeast reproductive toxicity correlates well with published reproductive toxicity in mammals illustrating the promise of this NAM to quickly assess chemicals to prioritize the evaluation for human reproductive harm.
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Affiliation(s)
- Ravinder Kumar
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, CA, USA; Center of Reproductive Sciences, University of California, San Francisco, CA, USA
| | - Ashwini Oke
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, CA, USA; Center of Reproductive Sciences, University of California, San Francisco, CA, USA
| | - Beth Rockmill
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, CA, USA; Center of Reproductive Sciences, University of California, San Francisco, CA, USA
| | - Matthew de Cruz
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, CA, USA; Center of Reproductive Sciences, University of California, San Francisco, CA, USA
| | - Rafael Verduzco
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, CA, USA; Center of Reproductive Sciences, University of California, San Francisco, CA, USA
| | - Anura Shodhan
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, CA, USA; Center of Reproductive Sciences, University of California, San Francisco, CA, USA
| | - Xavier Woodruff-Madeira
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, CA, USA; Center of Reproductive Sciences, University of California, San Francisco, CA, USA
| | - Dimitri P Abrahamsson
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, CA, USA
| | - Julia Varshavsky
- Department of Health Sciences and Department of Civil and Environmental Engineering, Northeastern University, Boston, MA, USA
| | - Juleen Lam
- Department of Public Health, California State University, East Bay, Hayward, CA, USA
| | - Joshua F Robinson
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, CA, USA; Center of Reproductive Sciences, University of California, San Francisco, CA, USA
| | - Patrick Allard
- UCLA Institute for Society & Genetics, University of California, Los Angeles, CA, USA; Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, USA
| | - Tracey J Woodruff
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, CA, USA
| | - Jennifer C Fung
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, CA, USA; Center of Reproductive Sciences, University of California, San Francisco, CA, USA.
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16
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Butler CR, Popiolek M, McAllister LA, LaChapelle EA, Kramer M, Beck EM, Mente S, Brodney MA, Brown M, Gilbert A, Helal C, Ogilvie K, Starr J, Uccello D, Grimwood S, Edgerton J, Garst-Orozko J, Kozak R, Lotarski S, Rossi A, Smith D, O'Connor R, Lazzaro J, Steppan C, Steyn SJ. Design and Synthesis of Clinical Candidate PF-06852231 (CVL-231): A Brain Penetrant, Selective, Positive Allosteric Modulator of the M 4 Muscarinic Acetylcholine Receptor. J Med Chem 2024. [PMID: 38888621 DOI: 10.1021/acs.jmedchem.4c00293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
Selective activation of the M4 muscarinic acetylcholine receptor subtype offers a novel strategy for the treatment of psychosis in multiple neurological disorders. Although the development of traditional muscarinic activators has been stymied due to pan-receptor activation, muscarinic receptor subtype selectivity can be achieved through the utilization of a subtype of a unique allosteric site. A major challenge in capitalizing on this allosteric site to date has been achieving a balance of suitable potency and brain penetration. Herein, we describe the design of a brain penetrant series of M4 selective positive allosteric modulators (PAMs), ultimately culminating in the identification of 21 (PF-06852231, now CVL-231/emraclidine), which is under active clinical development as a novel mechanism and approach for the treatment of schizophrenia.
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Affiliation(s)
- Christopher R Butler
- Medicine Design, Medicinal Chemistry, Pfizer Inc., Cambridge, Massachusetts 02139, United States
| | - Michael Popiolek
- Internal Medicine, Pfizer Inc., Cambridge, Massachusetts 02139, United States
| | - Laura A McAllister
- Medicine Design, Medicinal Chemistry, Pfizer Inc., Cambridge, Massachusetts 02139, United States
| | - Erik A LaChapelle
- Medicine Design, Medicinal Chemistry, Pfizer Inc., Groton, Connecticut 06340, United States
| | - Melissa Kramer
- Medicine Design, Pharmacokinetics, Dynamics and Metabolism, Pfizer Inc., Groton, Connecticut 06340, United States
| | - Elizabeth M Beck
- Medicine Design, Medicinal Chemistry, Pfizer Inc., Cambridge, Massachusetts 02139, United States
| | - Scot Mente
- Medicine Design, Medicinal Chemistry, Pfizer Inc., Cambridge, Massachusetts 02139, United States
| | - Michael A Brodney
- Medicine Design, Medicinal Chemistry, Pfizer Inc., Cambridge, Massachusetts 02139, United States
| | - Matthew Brown
- Medicine Design, Medicinal Chemistry, Pfizer Inc., Groton, Connecticut 06340, United States
| | - Adam Gilbert
- Medicine Design, Medicinal Chemistry, Pfizer Inc., Groton, Connecticut 06340, United States
| | - Chris Helal
- Medicine Design, Medicinal Chemistry, Pfizer Inc., Groton, Connecticut 06340, United States
| | - Kevin Ogilvie
- Medicine Design, Medicinal Chemistry, Pfizer Inc., Groton, Connecticut 06340, United States
| | - Jeremy Starr
- Medicine Design, Medicinal Chemistry, Pfizer Inc., Groton, Connecticut 06340, United States
| | - Daniel Uccello
- Medicine Design, Medicinal Chemistry, Pfizer Inc., Groton, Connecticut 06340, United States
| | - Sarah Grimwood
- Internal Medicine, Pfizer Inc., Cambridge, Massachusetts 02139, United States
| | - Jeremy Edgerton
- Internal Medicine, Pfizer Inc., Cambridge, Massachusetts 02139, United States
| | | | - Rouba Kozak
- Internal Medicine, Pfizer Inc., Cambridge, Massachusetts 02139, United States
| | - Susan Lotarski
- Internal Medicine, Pfizer Inc., Cambridge, Massachusetts 02139, United States
| | - Amie Rossi
- Internal Medicine, Pfizer Inc., Cambridge, Massachusetts 02139, United States
| | - Deborah Smith
- Internal Medicine, Pfizer Inc., Cambridge, Massachusetts 02139, United States
| | - Rebecca O'Connor
- Discovery Sciences, Primary Pharmacology, Pfizer Inc., Groton, Connecticut 06340, United States
| | - John Lazzaro
- Discovery Sciences, Primary Pharmacology, Pfizer Inc., Groton, Connecticut 06340, United States
| | - Claire Steppan
- Discovery Sciences, Primary Pharmacology, Pfizer Inc., Groton, Connecticut 06340, United States
| | - Stefanus J Steyn
- Medicine Design, Pharmacokinetics, Dynamics and Metabolism, Pfizer Inc., Groton, Connecticut 06340, United States
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17
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Savage SR, Yi X, Lei JT, Wen B, Zhao H, Liao Y, Jaehnig EJ, Somes LK, Shafer PW, Lee TD, Fu Z, Dou Y, Shi Z, Gao D, Hoyos V, Gao Q, Zhang B. Pan-cancer proteogenomics expands the landscape of therapeutic targets. Cell 2024:S0092-8674(24)00583-X. [PMID: 38917788 DOI: 10.1016/j.cell.2024.05.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 04/03/2024] [Accepted: 05/21/2024] [Indexed: 06/27/2024]
Abstract
Fewer than 200 proteins are targeted by cancer drugs approved by the Food and Drug Administration (FDA). We integrate Clinical Proteomic Tumor Analysis Consortium (CPTAC) proteogenomics data from 1,043 patients across 10 cancer types with additional public datasets to identify potential therapeutic targets. Pan-cancer analysis of 2,863 druggable proteins reveals a wide abundance range and identifies biological factors that affect mRNA-protein correlation. Integration of proteomic data from tumors and genetic screen data from cell lines identifies protein overexpression- or hyperactivation-driven druggable dependencies, enabling accurate predictions of effective drug targets. Proteogenomic identification of synthetic lethality provides a strategy to target tumor suppressor gene loss. Combining proteogenomic analysis and MHC binding prediction prioritizes mutant KRAS peptides as promising public neoantigens. Computational identification of shared tumor-associated antigens followed by experimental confirmation nominates peptides as immunotherapy targets. These analyses, summarized at https://targets.linkedomics.org, form a comprehensive landscape of protein and peptide targets for companion diagnostics, drug repurposing, and therapy development.
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Affiliation(s)
- Sara R Savage
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Xinpei Yi
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Jonathan T Lei
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Bo Wen
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Hongwei Zhao
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital and Key Laboratory of Carcinogenesis and Cancer Invasion of the Ministry of China, Fudan University, 180 Fenglin Road, Shanghai 200032, China
| | - Yuxing Liao
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Eric J Jaehnig
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Lauren K Somes
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston, TX 77030, USA
| | - Paul W Shafer
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston, TX 77030, USA
| | - Tobie D Lee
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
| | - Zile Fu
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital and Key Laboratory of Carcinogenesis and Cancer Invasion of the Ministry of China, Fudan University, 180 Fenglin Road, Shanghai 200032, China
| | - Yongchao Dou
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Zhiao Shi
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Daming Gao
- Key Laboratory of Multi-Cell Systems, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai 200031, China
| | - Valentina Hoyos
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA; Center for Cell and Gene Therapy, Baylor College of Medicine, Houston, TX 77030, USA
| | - Qiang Gao
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital and Key Laboratory of Carcinogenesis and Cancer Invasion of the Ministry of China, Fudan University, 180 Fenglin Road, Shanghai 200032, China.
| | - Bing Zhang
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA.
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18
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Knöpfel G, Baty F, Uhl F, Kern L, Brutsche M. Quantification of breathing irregularity for the diagnosis of dysfunctional breathing using proportional tidal volume variation: a cross-sectional, retrospective real-world study. BMJ Open 2024; 14:e083401. [PMID: 38885986 PMCID: PMC11184190 DOI: 10.1136/bmjopen-2023-083401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/20/2024] Open
Abstract
OBJECTIVES To develop a statistical approach that provides a quantitative index measuring the magnitude of the irregularity of the breathing response to exercise for the diagnosis of dysfunctional breathing. DESIGN Cross-sectional, retrospective, real-world study. SETTING Single-centre study. PARTICIPANTS A population of 209 patients investigated with cardiopulmonary exercise testing in our institution for unexplained or disproportionate exertional dyspnoea between January and July 2022. PRIMARY AND SECONDARY OUTCOME MEASURES A novel statistical approach providing a quantitative index-proportional tidal volume variation (PTVV)-was developed to measure the magnitude of the irregularity of the breathing response to exercise. RESULTS PTVV provided a reliable statistical readout for the objective assessment of DB with a prediction accuracy of 78% (95% CI: 72 to 83%). The prevalence of DB in the investigated population was high with more than half of the patients affected by moderate-to-severe DB. CONCLUSIONS PTVV can easily be implemented in the clinical routine. Our study suggests a possible further simplification for the diagnosis of DB with two objective criteria including PTVV and one single criterion for hyperventilation.
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Affiliation(s)
- Georg Knöpfel
- Pulmonary Medicine, Cantonal Hospital St. Gallen, Sankt Gallen, Switzerland
| | - Florent Baty
- Pulmonary Medicine, Cantonal Hospital St. Gallen, Sankt Gallen, Switzerland
- University of Basel, Basel, Switzerland
| | - Friedrich Uhl
- Pulmonary Medicine, Cantonal Hospital St. Gallen, Sankt Gallen, Switzerland
| | - Lukas Kern
- Pulmonary Medicine, Cantonal Hospital St. Gallen, Sankt Gallen, Switzerland
| | - Martin Brutsche
- Pulmonary Medicine, Cantonal Hospital St. Gallen, Sankt Gallen, Switzerland
- University of Basel, Basel, Switzerland
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19
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Zong L, Wang X, Huo M, Yi F, Huang S, Ling T, Fang Y, Ma F, Zhang X, Guan M. Insights into the synergistic toxicity mechanisms caused by nano- and microplastics with triclosan using a dose-dependent functional genomics approach in Saccharomyces cerevisiae. CHEMOSPHERE 2024; 362:142629. [PMID: 38885766 DOI: 10.1016/j.chemosphere.2024.142629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Revised: 06/13/2024] [Accepted: 06/14/2024] [Indexed: 06/20/2024]
Abstract
The emergence of polystyrene (PS) nano- and microplastics (NMPs) and triclosan (TCS) as environmental contaminants has raised concerns about their combined toxicities to organisms, but the complex toxicity arising from their interactions and the underlying molecular mechanisms remain obscure to us. In this study, we comprehensively detected the combined toxicity of PS-NMPs and TCS via the dose-dependent yeast functional genomics profiling. Firstly, our findings demonstrated that the combined exposure to PS-NMPs and TCS elicited a synergistic toxic effect in which the toxicity depended on the size of the PS-NMPs. Secondly, we found that TCS exposure, either alone or in combination with PS-NMPs, influenced lipid biosynthetic processes and ATP export pathways, while the unique responsive genes triggered by combined exposure to TCS and PS-NMPs are significantly enriched in mitochondrial translation, ribosomal small subunit assembly, and tRNA wobble uridine modification. Thirdly, our results demonstrated that point of departure (POD) at the pathway level was positively correlated with IC50, and POD was a more sensitive predictor of toxicity than the apical toxicity endpoints. More importantly, our findings suggested that the combined exposure of PS-NMPs in a size-dependent manner not only alleviated the harmful effects of TCS on glycerophospholipid metabolism, but also exacerbated its negative impact on oxidative phosphorylation. Collectively, our study not only provides new insights into the intricate molecular mechanisms that control the combined toxicity of PS-NMPs and TCS, but also confirms the effectiveness of the dose-dependent functional genomics approach in elucidating the molecular mechanisms of the combined toxicity of pollutants.
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Affiliation(s)
- Linhao Zong
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Rd., Nanjing, Jiangsu, 210023, China
| | - Xiaoyang Wang
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Rd., Nanjing, Jiangsu, 210023, China
| | - Miaomiao Huo
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Rd., Nanjing, Jiangsu, 210023, China
| | - Fangying Yi
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Rd., Nanjing, Jiangsu, 210023, China
| | - Shan Huang
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Rd., Nanjing, Jiangsu, 210023, China
| | - Tianqi Ling
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Rd., Nanjing, Jiangsu, 210023, China
| | - Yumo Fang
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Rd., Nanjing, Jiangsu, 210023, China
| | - Fei Ma
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Rd., Nanjing, Jiangsu, 210023, China
| | - Xiaowei Zhang
- State Key Laboratory of Pollution Control & Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Ave., Nanjing, Jiangsu, 210023, China
| | - Miao Guan
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Rd., Nanjing, Jiangsu, 210023, China.
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20
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Spawton KA, du Toit LJ. Prevalence of FRAC Group 11 Fungicide Resistance in Stemphylium vesicarium Isolates, but Not S. beticola Isolates, Causing Stemphylium Leaf Spot of Spinach ( Spinacia oleracea). PLANT DISEASE 2024:PDIS11232328RE. [PMID: 38457632 DOI: 10.1094/pdis-11-23-2328-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/10/2024]
Abstract
Stemphylium leaf spot of spinach, caused by Stemphylium beticola and S. vesicarium, is a disease of economic importance in fresh market, processing, and seed production. There have been increasing reports of difficulty managing the disease in the southern United States using fungicides in Fungicide Resistance Action Committee (FRAC) group 11. Isolates of S. beticola and S. vesicarium obtained from spinach leaves and seed from 2001 to 2020 were screened for resistance to azoxystrobin and pyraclostrobin in vitro, in vivo, and using PCR assays to detect mutations in cytochrome b associated with resistance in other fungi (F129L, G137R, and G143A). EC50 values for mycelial growth and conidial germination of S. vesicarium isolates in vitro were significantly less (mean of 0.35 μg/ml) than that of S. vesicarium (mean of 14.17 μg/ml) with both fungicides. All isolates were slightly more sensitive to pyraclostrobin than azoxystrobin in both assays. In vivo assays of plants inoculated with the isolates of S. vesicarium demonstrated poor efficacy of fungicides with each of the two active ingredients. Only the G143A mutation was detected in all spinach isolates of S. vesicarium, including an isolate of S. vesicarium collected in 2003 and 82.9% of isolates from spinach seed lots harvested from crops grown in or after 2017 in Europe, New Zealand, and the United States. The FRAC 11 mutations were not detected in any isolates of S. beticola. The in vitro, in vivo, and DNA mutation assays suggest FRAC group 11 fungicide resistance is widespread in spinach isolates of S. vesicarium but not S. beticola.
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Affiliation(s)
- Kayla A Spawton
- Washington State University Mount Vernon Northwestern Washington Research and Extension Center, Mount Vernon, WA 98273
| | - Lindsey J du Toit
- Washington State University Mount Vernon Northwestern Washington Research and Extension Center, Mount Vernon, WA 98273
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21
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Andrade VS, Ale A, Antezana PE, Desimone MF, Cazenave J, Gutierrez MF. Environmental factors modify silver nanoparticles ecotoxicity in Chydorus eurynotus (Cladocera). ECOTOXICOLOGY (LONDON, ENGLAND) 2024:10.1007/s10646-024-02766-8. [PMID: 38861073 DOI: 10.1007/s10646-024-02766-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/03/2024] [Indexed: 06/12/2024]
Abstract
Silver nanoparticles (AgNPs) are among the most produced nanomaterials in the world and are incorporated into several products due to their biocide and physicochemical properties. Since freshwater bodies are AgNPs main final sink, several consequences for biota are expected to occur. With the hypothesis that AgNPs can interact with environmental factors, we analyzed their ecotoxicity in combination with humic acids and algae. In addition to the specific AgNPs behavior in the media, we analyzed the mortality, growth, and phototactic behavior of Chydorus eurynotus (Cladocera) as response variables. While algae promoted Ag+ release, humic acids reduced it by adsorption, and their combination resulted in an intermediated Ag+ release. AgNPs affected C. eurynotus survival and growth, but algae and humic acids reduced AgNPs lethality, especially when combined. The humic acids mitigated AgNP effects in C. eurynotus growth, and both factors improved its phototactic behavior. It is essential to deepen the study of the isolated and combined influences of environmental factors on the ecotoxicity of nanoparticles to achieve accurate predictions under realistic exposure scenarios.
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Affiliation(s)
| | - Analía Ale
- Instituto Nacional de Limnología (CONICET-UNL), Santa Fe, Argentina
| | - Pablo Edmundo Antezana
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Instituto de la Química y Metabolismo del Fármaco (IQUIMEFA), Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Martín Federico Desimone
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Instituto de la Química y Metabolismo del Fármaco (IQUIMEFA), Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Jimena Cazenave
- Instituto Nacional de Limnología (CONICET-UNL), Santa Fe, Argentina
- Departamento de Ciencias Naturales, Facultad de Humanidades y Ciencias, Universidad Nacional del Litoral (FHUC-UNL), Santa Fe, Argentina
| | - María Florencia Gutierrez
- Instituto Nacional de Limnología (CONICET-UNL), Santa Fe, Argentina
- Escuela Superior de Sanidad "Dr. Ramon Carrillo", Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral (FBCB-UNL), Santa Fe, Argentina
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22
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Boerlijst SP, van der Gaast A, Adema LMW, Bouman RW, Boelee E, van Bodegom PM, Schrama M. Taking it with a grain of salt: tolerance to increasing salinization in Culex pipiens (Diptera: Culicidae) across a low-lying delta. Parasit Vectors 2024; 17:251. [PMID: 38858771 PMCID: PMC11165877 DOI: 10.1186/s13071-024-06268-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 04/01/2024] [Indexed: 06/12/2024] Open
Abstract
BACKGROUND Salinity, exacerbated by rising sea levels, is a critical environmental cue affecting freshwater ecosystems. Predicting ecosystem structure in response to such changes and their implications for the geographical distribution of arthropod disease vectors requires further insights into the plasticity and adaptability of lower trophic level species in freshwater systems. Our study investigated whether populations of the mosquito Culex pipiens, typically considered sensitive to salt, have adapted due to gradual exposure. METHODS Mesocosm experiments were conducted to evaluate responses in life history traits to increasing levels of salinity in three populations along a gradient perpendicular to the North Sea coast. Salt concentrations up to the brackish-marine transition zone (8 g/l chloride) were used, upon which no survival was expected. To determine how this process affects oviposition, a colonization experiment was performed by exposing the coastal population to the same concentrations. RESULTS While concentrations up to the currently described median lethal dose (LD50) (4 g/l) were surprisingly favored during egg laying, even the treatment with the highest salt concentration was incidentally colonized. Differences in development rates among populations were observed, but the influence of salinity was evident only at 4 g/l and higher, resulting in only a 1-day delay. Mortality rates were lower than expected, reaching only 20% for coastal and inland populations and 41% for the intermediate population at the highest salinity. Sex ratios remained unaffected across the tested range. CONCLUSIONS The high tolerance to salinity for all key life history parameters across populations suggests that Cx. pipiens is unlikely to shift its distribution in the foreseeable future, with potential implications for the disease risk of associated pathogens.
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Affiliation(s)
- Sam Philip Boerlijst
- Center for Environmental Research Leiden, Department of Environmental Biology, Leiden University, Einsteinweg 2, 2333 CC, Leiden, The Netherlands.
- Division of Inland Water Systems, Deltares, 177, 2600 MH, Delft, The Netherlands.
| | - Antje van der Gaast
- Center for Environmental Research Leiden, Department of Environmental Biology, Leiden University, Einsteinweg 2, 2333 CC, Leiden, The Netherlands
| | - Lisa Maria Wilhelmina Adema
- Center for Environmental Research Leiden, Department of Environmental Biology, Leiden University, Einsteinweg 2, 2333 CC, Leiden, The Netherlands
| | - Roderick Wiebe Bouman
- Hortus Botanicus Leiden, 9500, 2300 RA, Leiden, The Netherlands
- Naturalis Biodiversity Center, 9517, 2300 RA, Leiden, Netherlands
- Institute of Biology Leiden, Leiden University, 9505, 2300 RA, Leiden, Netherlands
| | - Eline Boelee
- Division of Inland Water Systems, Deltares, 177, 2600 MH, Delft, The Netherlands
| | - Peter Michiel van Bodegom
- Center for Environmental Research Leiden, Department of Environmental Biology, Leiden University, Einsteinweg 2, 2333 CC, Leiden, The Netherlands
| | - Maarten Schrama
- Center for Environmental Research Leiden, Department of Environmental Biology, Leiden University, Einsteinweg 2, 2333 CC, Leiden, The Netherlands
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23
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Robinson KE, Moniz HA, Stokes AN, Feldman CR. Where Does All the Poison Go? Investigating Toxicokinetics of Newt (Taricha) Tetrodotoxin (TTX) in Garter Snakes (Thamnophis). J Chem Ecol 2024:10.1007/s10886-024-01517-7. [PMID: 38842636 DOI: 10.1007/s10886-024-01517-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 05/14/2024] [Accepted: 05/22/2024] [Indexed: 06/07/2024]
Abstract
Animals that consume toxic diets provide models for understanding the molecular and physiological adaptations to ecological challenges. Garter snakes (Thamnophis) in western North America prey on Pacific newts (Taricha), which employ tetrodotoxin (TTX) as an antipredator defense. These snakes possess mutations in voltage-gated sodium channels (Nav), the molecular targets of TTX, that decrease the binding ability of TTX to sodium channels (target-site resistance). However, genetic variation at these loci that cannot explain all the phenotypic variation in TTX resistance in Thamnophis. We explored a separate means of resistance, toxin metabolism, to determine if TTX-resistant snakes either rapidly remove TTX or sequester TTX. We examined the metabolism and distribution of TTX in the body (toxicokinetics), to determine differences between TTX-resistant and TTX-sensitive snakes in the rates at which TTX is eliminated from organs and the whole body (using TTX half-life as our metric). We assayed TTX half-life in snakes from TTX-resistant and TTX-sensitive populations of three garter snake species with a coevolutionary history with newts (T. atratus, T. couchii, T. sirtalis), as well as two non-resistant "outgroup" species (T. elegans, Pituophis catenifer) that seldom (if ever) engage newts. We found TTX half-life varied across species, populations, and tissues. Interestingly, TTX half-life was shortest in T. elegans and P. catenifer compared to all other snakes. Furthermore, TTX-resistant populations of T. couchii and T. sirtalis eliminated TTX faster (shorter TTX half-life) than their TTX-sensitive counterparts, while populations of TTX-resistant and TTX-sensitive T. atratus showed no difference rates of TTX removal (same TTX half-life). The ability to rapidly eliminate TTX may have permitted increased prey consumption, which may have promoted the evolution of additional resistance mechanisms. Finally, snakes still retain substantial amounts of TTX, and we projected that snakes could be dangerous to their own predators days to weeks following the ingestion of a single newt. Thus, aspects of toxin metabolism may have been key in driving predator-prey relationships, and important in determining other ecological interactions.
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Affiliation(s)
- Kelly E Robinson
- Department of Biology and Program in Ecology, Evolution and Conservation Biology, University of Nevada, Reno, Reno, NV, USA.
- Program in Ecology, Evolution and Conservation Biology, University of Nevada, Reno, NV, USA.
| | - Haley A Moniz
- Department of Biology and Program in Ecology, Evolution and Conservation Biology, University of Nevada, Reno, Reno, NV, USA
- Program in Ecology, Evolution and Conservation Biology, University of Nevada, Reno, NV, USA
- Department of Biological Sciences, California Polytechnic State University, San Luis Obispo, CA, USA
| | - Amber N Stokes
- Department of Biology, California State University Bakersfield, Bakersfield, CA, USA
| | - Chris R Feldman
- Department of Biology and Program in Ecology, Evolution and Conservation Biology, University of Nevada, Reno, Reno, NV, USA
- Program in Ecology, Evolution and Conservation Biology, University of Nevada, Reno, NV, USA
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24
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Martin WJ, Sibley PK, Prosser RS. Characterization of Springtail (Arrhopalites caecus) for Use in Soil Ecotoxicity Testing. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2024. [PMID: 38837715 DOI: 10.1002/etc.5898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 03/01/2024] [Accepted: 04/23/2024] [Indexed: 06/07/2024]
Abstract
Springtails (subclass: Collembola) represent one of the most extensively studied invertebrate groups in soil ecotoxicology. This is because of their ease of laboratory culture, significant ecological role, and sensitivity to environmental contaminants. Folsomia candida (family: Isotomidae) is a globally widespread parthenogenetic species that is prevalent in laboratory toxicity testing with springtails. Conversely, Arrhopalites caecus (family: Arrhopalitidae), a parthenogenic globular springtail species, remains untested in soil ecotoxicology. This species is found in diverse habitats, including cave systems and forest leaf litter, and has a global distribution. The sensitivity of A. caecus to environmental contaminants, such as neonicotinoid insecticides, as well as its life history and optimal culturing conditions, are largely unknown. The present study describes the establishment of a pure A. caecus laboratory culture and characterization of its life cycle and culturing conditions. We assessed the sensitivity of A. caecus to various insecticides, including exposures to the neonicotinoid thiamethoxam in soil and through a novel feeding assay as well as to clothianidin and cyantraniliprole in spiked soil exposures. In 7- and 14-day exposures to thiamethoxam in agricultural soil, the 50% lethal concentration (LC50) values were determined to be 0.129 mg/kg dry weight and 0.010 mg/kg dry weight, respectively. The 14-day LC50 for exposure to thiamethoxam via spiked food was determined to be 0.307 mg/kg dry weight. In addition, the 28-day 50% effect concentration for inhibition of juvenile production from cyantraniliprole exposure in the same soil type was 0.055 mg/kg dry weight. Challenges encountered in using this species included susceptibility to mite infestation and low adult survival rates in the 28-day cyantraniliprole test. Environ Toxicol Chem 2024;00:1-16. © 2024 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.
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Affiliation(s)
- William J Martin
- School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Paul K Sibley
- School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Ryan S Prosser
- School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada
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25
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Streibig JC, Gejl M, Ritz C. The perspective of the logarithmic field sprayer technology. PEST MANAGEMENT SCIENCE 2024. [PMID: 38837648 DOI: 10.1002/ps.8187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Revised: 04/25/2024] [Accepted: 05/08/2024] [Indexed: 06/07/2024]
Abstract
A logarithmic sprayer was suggested about 70 years ago, but it has not yet been seriously used in research and development, and subsequent registration of plant protection products. Logarithmic sprayers have resorted to mere demonstration experiments to show end users and others how plant protection products work. Fitting dose-response curves in field experiments, however, generates much essential information, e.g., extraction of various effective field rate levels (e.g., ED20, ED50, and ED80). One of the reasons for it rarely being used in the registration of plant protection products is that the dose-response curve regression was hitherto difficult to fit; the registration requirement solely focuses on analyses of variance. Another alleged obstacle is that the logarithmic plots have systematically, not randomly distributed field rates. This paper goes through some of the problems of how to non-randomly analyze field rates by taking autocorrelation into account to make the logarithmic sprayer palatable as registration documentation by assessing efficacy, selectivity, environmental side effects, general toxicity of plant protection products, and cost-effectiveness. The development in precision agriculture, drone technology, and automation of data capture and subsequent analysis could make the logarithmic sprayer a cost-effective alternative to numerous ANOVA experiments with very few fixed field rates to aid the precision spraying of pesticides and thus reduce unnecessary environmental side effects. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Jens C Streibig
- Department of Plant and Environmental Sciences, University of Copenhagen, Taastrup, Denmark
| | | | - Christian Ritz
- National Institute of Public Health, The University of Southern Denmark, Copenhagen K, Denmark
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26
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Lima VH, Matugawa AT, Mascarin GM, Fernandes ÉKK. Complex nitrogen sources from agro-industrial byproducts: impact on production, multi-stress tolerance, virulence, and quality of Beauveria bassiana blastospores. Microbiol Spectr 2024; 12:e0404023. [PMID: 38700331 DOI: 10.1128/spectrum.04040-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Accepted: 03/28/2024] [Indexed: 05/05/2024] Open
Abstract
We investigated the impact of various complex organic nitrogen sources on the submerged liquid fermentation of Beauveria bassiana, a versatile entomopathogenic fungus known for producing hydrophilic yeast-like single cells called blastospores. Specifically, we examined yeast extract, autolyzed yeast, inactive yeast, cottonseed flour, corn bran, and corn gluten meal as nitrogen compounds with different carbon-to-nitrogen (C:N) ratios. Our comprehensive analysis encompassed blastospore production, tolerance to abiotic stresses, shelf stability after drying, and virulence against mealworm larvae, crucial attributes for developing effective blastospore-based biopesticides. Notably, cottonseed flour emerged as the optimal nitrogen source, yielding up to 2.5 × 109 blastospores/mL within 3 days in a bioreactor. These blastospores exhibited the highest tolerance to heat stress and UV-B radiation exposure. The endogenous C:N ratio in blastospore composition was also impacted by nitrogen sources. Bioassays with mealworm larvae demonstrated that blastospores from cottonseed flour were the most virulent, achieving faster lethality (lower LT50) and requiring a lower inoculum (LC50). Importantly, blastospores produced with cottonseed flour displayed extended viability during storage, surpassing the retention of viability compared to those from autolyzed yeast over 180 days at 4°C. Despite differences in storage viability, both nitrogen sources conferred similar long-term blastospore bioactivity against mealworms. In summary, this research advances our understanding of the crucial impact of complex organic nitrogen selection on the phenotypic traits of blastospores in association with their intracellular C:N ratio, contributing to the production of ecologically fit, shelf-stable, and virulent propagules for effective pest biocontrol programs. IMPORTANCE Biological control through entomopathogenic fungi provides essential ecological services in the integrated management of agricultural pests. In the context of submerged liquid fermentation, the nutritional composition significantly influences the ecological fitness, virulence and quality of these fungi. This study specifically explores the impact of various complex organic nitrogen sources derived from agro-industrial byproducts on the submerged liquid fermentation of Beauveria bassiana, a versatile entomopathogenic fungus known for producing hydrophilic yeast-like blastospores. Notably, manipulating the nitrogen source during submerged cultivation can influence the quality, fitness, and performance of blastospores. This research identifies cottonseed flour as the optimal low-cost nitrogen source, contributing to increased production yields, enhanced multi-stress tolerance, heightened virulence with extended shelf life and long-term bioactivity. These findings deepen our understanding of the critical role of nitrogen compound selection in liquid media formulation, facilitating the production of ecologically fit and virulent blastospores for more effective pest biocontrol programs.
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Affiliation(s)
- Valesca Henrique Lima
- Programa de Pós-graduação em Ciência Animal, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | | | - Gabriel Moura Mascarin
- Laboratório de Microbiologia Ambiental, Embrapa Meio Ambiente, Jaguariúna, São Paulo, Brazil
| | - Éverton Kort Kamp Fernandes
- Programa de Pós-graduação em Ciência Animal, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
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Leuthner TC, Zhang S, Kohrn BF, Stapleton HM, Baugh LR. Structure-specific variation in per- and polyfluoroalkyl substances toxicity among genetically diverse Caenorhabditis elegans strains. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.29.596269. [PMID: 38854041 PMCID: PMC11160736 DOI: 10.1101/2024.05.29.596269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2024]
Abstract
Background There are >14,500 structurally diverse per- and polyfluoroalkyl substances (PFAS). Despite knowledge that these "forever chemicals" are in 99% of humans, mechanisms of toxicity and adverse health effects are incompletely known. Furthermore, the contribution of genetic variation to PFAS susceptibility and health consequences is unknown. Objectives We determined the toxicity of a structurally distinct set of PFAS in twelve genetically diverse strains of the genetic model system Caenorhabditis elegans. Methods Dose-response curves for four perfluoroalkyl carboxylic acids (PFNA, PFOA, PFPeA, and PFBA), two perfluoroalkyl sulfonic acids (PFOS and PFBS), two perfluoroalkyl sulfonamides (PFOSA and PFBSA), two fluoroether carboxylic acids (GenX and PFMOAA), one fluoroether sulfonic acid (PFEESA), and two fluorotelomers (6:2 FCA and 6:2 FTS) were determined in the C. elegans laboratory reference strain, N2, and eleven genetically diverse wild strains. Body length was quantified by image analysis at each dose after 48 hr of developmental exposure of L1 arrest-synchronized larvae to estimate effective concentration values (EC50). Results There was a significant range in toxicity among PFAS: PFOSA > PFBSA ≈ PFOS ≈ PFNA > PFOA > GenX ≈ PFEESA > PFBS ≈ PFPeA ≈ PFBA. Long-chain PFAS had greater toxicity than short-chain, and fluorosulfonamides were more toxic than carboxylic and sulfonic acids. Genetic variation explained variation in susceptibility to PFBSA, PFOS, PFBA, PFOA, GenX, PFEESA, PFPeA, and PFBA. There was significant variation in toxicity among C. elegans strains due to chain length, functional group, and between legacy and emerging PFAS. Conclusion C. elegans respond to legacy and emerging PFAS of diverse structures, and this depends on specific structures and genetic variation. Harnessing the natural genetic diversity of C. elegans and the structural complexity of PFAS is a powerful New Approach Methodology (NAM) to investigate structure-activity relationships and mechanisms of toxicity which may inform regulation of other PFAS to improve human and environmental health.
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Affiliation(s)
- Tess C. Leuthner
- Department of Biology, Duke University, Durham, North Carolina, USA
| | - Sharon Zhang
- Nicholas School of the Environment, Duke University, Durham, North Carolina, USA
| | - Brendan F Kohrn
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA
| | - Heather M. Stapleton
- Nicholas School of the Environment, Duke University, Durham, North Carolina, USA
| | - L. Ryan Baugh
- Department of Biology, Duke University, Durham, North Carolina, USA
- Center for Genomic and Computational Biology, Duke University, North Carolina, USA
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28
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Rosenberger T, Bell AM, Reifferscheid G, Smith KEC, Schäffer A, Ternes TA, Buchinger S. Extrapolation of cytotoxic masked effects in planar in vitro assays. Anal Bioanal Chem 2024; 416:3519-3532. [PMID: 38656365 DOI: 10.1007/s00216-024-05302-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 04/08/2024] [Accepted: 04/15/2024] [Indexed: 04/26/2024]
Abstract
The masking of specific effects in in vitro assays by cytotoxicity is a commonly known phenomenon. This may result in a partial or complete loss of effect signals. For common in vitro assays, approaches for identifying and quantifying cytotoxic masking are partly available. However, a quantification of cytotoxicity-affected signals is not possible. As an alternative, planar bioassays that combine high-performance thin layer chromatography with in vitro assays, such as the planar yeast estrogen screen (p-YES), might allow for a quantification of cytotoxically affected signals. Affected signals form a typical ring structure with a supressed or completely lacking centre that results in a double peak chromatogram. This study investigates whether these double peaks can be used for fitting a peak function to extrapolate the theoretical, unaffected signals. The precision of the modelling was evaluated for four individual peak functions, using 42 ideal, undistorted peaks from estrogenic model compounds in the p-YES. Modelled ED50-values from bisphenol A (BPA) experiments with cytotoxically disturbed signals were 13 times higher than for the apparent data without compensation for cytotoxicity (320 ± 63 ng versus 24 ± 17 ng). This finding has a high relevance for the modelling of mixture effects according to concentration addition that requires unaffected, complete dose-response relationships. Finally, we applied the approach to results of a p-YES assay on leachate samples of an elastomer material used in water engineering. In summary, the fitting approach enables the quantitative evaluation of cytotoxically affected signals in planar in vitro assays and also has applications for other fields of chemical analysis like distorted chromatography signals.
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Affiliation(s)
- Timothy Rosenberger
- Department G - Qualitative Hydrology, Federal Institute of Hydrology (BfG), Am Mainzer Tor 1, 56068, Koblenz, Germany
| | - Anna Maria Bell
- Department G - Qualitative Hydrology, Federal Institute of Hydrology (BfG), Am Mainzer Tor 1, 56068, Koblenz, Germany
| | - Georg Reifferscheid
- Department G - Qualitative Hydrology, Federal Institute of Hydrology (BfG), Am Mainzer Tor 1, 56068, Koblenz, Germany
| | - Kilian E C Smith
- Environmental Chemistry - Department of Water, Environment, Construction and Safety, University of Applied Sciences Magdeburg-Stendal, Breitscheidstraße 2, 39114, Magdeburg, Germany
| | - Andreas Schäffer
- Institute for Environmental Research, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany
| | - Thomas A Ternes
- Department G - Qualitative Hydrology, Federal Institute of Hydrology (BfG), Am Mainzer Tor 1, 56068, Koblenz, Germany
| | - Sebastian Buchinger
- Department G - Qualitative Hydrology, Federal Institute of Hydrology (BfG), Am Mainzer Tor 1, 56068, Koblenz, Germany.
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Holfeld A, Schuster D, Sesterhenn F, Gillingham AK, Stalder P, Haenseler W, Barrio-Hernandez I, Ghosh D, Vowles J, Cowley SA, Nagel L, Khanppnavar B, Serdiuk T, Beltrao P, Korkhov VM, Munro S, Riek R, de Souza N, Picotti P. Systematic identification of structure-specific protein-protein interactions. Mol Syst Biol 2024; 20:651-675. [PMID: 38702390 PMCID: PMC11148107 DOI: 10.1038/s44320-024-00037-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 04/12/2024] [Accepted: 04/15/2024] [Indexed: 05/06/2024] Open
Abstract
The physical interactome of a protein can be altered upon perturbation, modulating cell physiology and contributing to disease. Identifying interactome differences of normal and disease states of proteins could help understand disease mechanisms, but current methods do not pinpoint structure-specific PPIs and interaction interfaces proteome-wide. We used limited proteolysis-mass spectrometry (LiP-MS) to screen for structure-specific PPIs by probing for protease susceptibility changes of proteins in cellular extracts upon treatment with specific structural states of a protein. We first demonstrated that LiP-MS detects well-characterized PPIs, including antibody-target protein interactions and interactions with membrane proteins, and that it pinpoints interfaces, including epitopes. We then applied the approach to study conformation-specific interactors of the Parkinson's disease hallmark protein alpha-synuclein (aSyn). We identified known interactors of aSyn monomer and amyloid fibrils and provide a resource of novel putative conformation-specific aSyn interactors for validation in further studies. We also used our approach on GDP- and GTP-bound forms of two Rab GTPases, showing detection of differential candidate interactors of conformationally similar proteins. This approach is applicable to screen for structure-specific interactomes of any protein, including posttranslationally modified and unmodified, or metabolite-bound and unbound protein states.
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Affiliation(s)
- Aleš Holfeld
- Institute of Molecular Systems Biology, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Dina Schuster
- Institute of Molecular Systems Biology, Department of Biology, ETH Zurich, Zurich, Switzerland
- Institute of Molecular Biology and Biophysics, Department of Biology, ETH Zurich, Zurich, Switzerland
- Laboratory of Biomolecular Research, Division of Biology and Chemistry, Paul Scherrer Institute, Villigen, Switzerland
| | - Fabian Sesterhenn
- Institute of Molecular Systems Biology, Department of Biology, ETH Zurich, Zurich, Switzerland
| | | | - Patrick Stalder
- Institute of Molecular Systems Biology, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Walther Haenseler
- Institute of Molecular Systems Biology, Department of Biology, ETH Zurich, Zurich, Switzerland
- University Research Priority Program AdaBD (Adaptive Brain Circuits in Development and Learning), University of Zurich, Zurich, Switzerland
| | - Inigo Barrio-Hernandez
- European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK
- Open Targets, Wellcome Genome Campus, Hinxton, Cambridge, UK
| | - Dhiman Ghosh
- Laboratory of Physical Chemistry, ETH Zurich, Zurich, Switzerland
| | - Jane Vowles
- James and Lillian Martin Centre for Stem Cell Research, Sir William Dunn School of Pathology, University of Oxford, Oxford, UK
| | - Sally A Cowley
- James and Lillian Martin Centre for Stem Cell Research, Sir William Dunn School of Pathology, University of Oxford, Oxford, UK
| | - Luise Nagel
- Cluster of Excellence Cellular Stress Responses in Aging-associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Basavraj Khanppnavar
- Institute of Molecular Biology and Biophysics, Department of Biology, ETH Zurich, Zurich, Switzerland
- Laboratory of Biomolecular Research, Division of Biology and Chemistry, Paul Scherrer Institute, Villigen, Switzerland
| | - Tetiana Serdiuk
- Institute of Molecular Systems Biology, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Pedro Beltrao
- Institute of Molecular Systems Biology, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Volodymyr M Korkhov
- Institute of Molecular Biology and Biophysics, Department of Biology, ETH Zurich, Zurich, Switzerland
- Laboratory of Biomolecular Research, Division of Biology and Chemistry, Paul Scherrer Institute, Villigen, Switzerland
| | - Sean Munro
- MRC Laboratory of Molecular Biology, Cambridge, UK
| | - Roland Riek
- Laboratory of Physical Chemistry, ETH Zurich, Zurich, Switzerland
| | - Natalie de Souza
- Institute of Molecular Systems Biology, Department of Biology, ETH Zurich, Zurich, Switzerland
- Department of Quantitative Biomedicine, University of Zurich, Zurich, Switzerland
| | - Paola Picotti
- Institute of Molecular Systems Biology, Department of Biology, ETH Zurich, Zurich, Switzerland.
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Marin-Tun CG, Torres-Acosta JFDJ, Capetillo-Leal CM, Sandoval-Castro CA, Hoste H, Borges-Argáez R, Mancilla-Montelongo MG. The in vitro rumen exsheathment test for studying the effect of plant extracts on the exsheathment of Haemonchus contortus infective larvae. Vet Parasitol 2024; 328:110184. [PMID: 38643645 DOI: 10.1016/j.vetpar.2024.110184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 04/09/2024] [Accepted: 04/09/2024] [Indexed: 04/23/2024]
Abstract
This study applied the in vitro rumen exsheathment test (IVRET) to evaluate the exsheathment kinetics of Haemonchus contortus infective larvae (L3) incubated in ruminal liquor (RL) containing acetone:water extracts of Acacia pennatula (AP), Gymnopodium floribundum (GF), Havardia albicans (HA) or Lysiloma latisiliquum (LL). The role of polyphenols in the biological activity of the evaluated extracts was also determined. Larvae were incubated in RL either alone or added with a different plant extract (AP, GF, HA, or LL) at 1200 μg/mL. Polyethylene glycol (PEG) was added to block polyphenols in each treatment (RL+PEG, AP+PEG, GF+PEG, HA+PEG, and LL+PEG). After incubation times of 0, 1, 3, 6, 9, and 24 h, the exsheathment process was stopped to count the number of ensheathed and exsheathed L3. A Log-Logistic model was used to determine the L3 exsheathment kinetics in the different RL treatments. The inflection point of the respective kinetic curves, which indicates the time to reach 50 % exsheathed L3 (T50), was the only parameter that differed when comparing the exsheathment models (99 % probability of difference). The T50 values obtained for GF, HA, and LL treatments (T50 = 7.11 - 7.58 h) were higher in comparison to the T50 of RL (5.72 h) (≥ 70 % probability of difference). The L3 incubated in RL added with GF, HA, and LL extracts delayed their exsheathment at 3 and 6 h of incubation (28.71 - 48.06 % exsheathment reduction) compared to the RL treatment. The T50 value for AP, AP+PEG, GF+PEG, HA+PEG, and LL+PEG were similar to RL and RL+PEG (T50 = 5.34 - 6.97 h). In conclusion, the IVRET can be used to identify plants with the potential to delay the exsheathment of H. contortus L3 in the ruminal liquor. The acetone:water extracts of G. floribundum, H. albicans, and L. latisiliquum delayed the T50 of H. contortus exsheathment, which was evident at 3 and 6 h of incubation in ruminal liquor. The observed exsheathment delay was attributed to the polyphenol content of the extracts.
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Affiliation(s)
- Cindy Goretti Marin-Tun
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Km 15.5 Carretera Mérida-Xmatkuil, Yucatán, Mérida C.P. 97315, Mexico
| | - Juan Felipe de Jesús Torres-Acosta
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Km 15.5 Carretera Mérida-Xmatkuil, Yucatán, Mérida C.P. 97315, Mexico
| | - Concepción Manuela Capetillo-Leal
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Km 15.5 Carretera Mérida-Xmatkuil, Yucatán, Mérida C.P. 97315, Mexico
| | - Carlos Alfredo Sandoval-Castro
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Km 15.5 Carretera Mérida-Xmatkuil, Yucatán, Mérida C.P. 97315, Mexico
| | - Hervé Hoste
- INRAE UMR 1225 Interactions Hôte Agents Pathogènes, 23 Chemin des Capelles, Toulouse F31076, France
| | - Rocío Borges-Argáez
- Centro de Investigación Científica de Yucatán, Calle 43 No. 130 Colonia Chuburná de Hidalgo, Yucatán, Mérida C.P. 97200, Mexico
| | - María Gabriela Mancilla-Montelongo
- CONAHCYT - Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Km 15.5 Carretera Mérida-Xmatkuil, Yucatán, Mérida C.P. 97315, Mexico.
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31
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Barbour MT, Meulemans MJ, Severson TJ, Wise JK, Waller DL. Carbon Dioxide Toxicity to Zebra Mussels (Dreissena polymorpha) is Dependent on Water Chemistry. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2024; 43:1312-1319. [PMID: 38578198 DOI: 10.1002/etc.5864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 11/05/2023] [Accepted: 03/07/2024] [Indexed: 04/06/2024]
Abstract
Carbon dioxide (CO2) is gaining interest as a tool to combat aquatic invasive species, including zebra mussels (Dreissena polymorpha). However, the effects of water chemistry on CO2 efficacy are not well described. We conducted five trials in which we exposed adult zebra mussels to a range of CO2 in water with adjusted total hardness and specific conductance. We compared dose-responses and found differences in lethal concentration to 50% of organisms (LC50) estimates ranging from 108.3 to 179.3 mg/L CO2 and lethal concentration to 90% of organisms (LC90) estimates ranging from 163.7 to 216.6 mg/L CO2. We modeled LC50 and LC90 estimates with measured water chemistry variables from the trials. We found sodium (Na+) concentration to have the strongest correlation to changes in the LC50 and specific conductance to have the strongest correlation to changes in the LC90. Our results identify water chemistry as an important factor in considering efficacious CO2 concentrations for zebra mussel control. Additional research into the physiological responses of zebra mussels exposed to CO2 may be warranted to further explain mode of action and reported selectivity. Further study could likely develop a robust and relevant model to refine CO2 applications for a wider range of water chemistries. Environ Toxicol Chem 2024;43:1312-1319. Published 2024. This article is a U.S. Government work and is in the public domain in the USA. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.
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Affiliation(s)
- Matthew T Barbour
- Upper Midwest Environmental Sciences Center, US Geological Survey, La Crosse, Wisconsin
| | - Matthew J Meulemans
- Upper Midwest Environmental Sciences Center, US Geological Survey, La Crosse, Wisconsin
| | - Todd J Severson
- Upper Midwest Environmental Sciences Center, US Geological Survey, La Crosse, Wisconsin
| | - Jeremy K Wise
- Upper Midwest Environmental Sciences Center, US Geological Survey, La Crosse, Wisconsin
| | - Diane L Waller
- Upper Midwest Environmental Sciences Center, US Geological Survey, La Crosse, Wisconsin
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32
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Short CA, Walters JL, Hahn DA. Bigger isn't always better: Challenging assumptions about the associations between diapause, body weight, and overwintering survival. Ecol Evol 2024; 14:e11511. [PMID: 38835525 PMCID: PMC11148123 DOI: 10.1002/ece3.11511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 05/06/2024] [Accepted: 05/16/2024] [Indexed: 06/06/2024] Open
Abstract
During the winter, animals face limited food availability. Many animals enter dormancy to reduce their winter energy expenditure. Most insects spend the winter in diapause, a state of programmed dormancy. It is often assumed that diapausing insects need nutrient stores to fuel their many months of basal metabolism and must grow heavier than their non-diapause-programmed counterparts. However, the extent to which food limitation affects body weight during overwintering preparation as well as the likelihood and duration of diapause remains unclear. We limited the duration of the feeding period and thus the total quantity of food available to diapause-destined larvae of the pupal-diapausing flesh fly, Sarcophaga crassipalpis, to test how food limitation affects body weight in the context of diapause programming. We also tested the extent to which food deprivation and body weight affect the likelihood and duration of diapause. We hypothesized that diapause-destined larvae grow more quickly and pupariate at a heavier body weight than non-diapause larvae. We also hypothesized that body weight is more dramatically reduced by food limitations when a larva is programmed for diapause. Finally, we hypothesized that larvae with lighter body weight (i.e., food limited) are less likely to enter pupal diapause and also stay in diapause for a shorter duration than heavier, well-fed, individuals. Contrary to our hypotheses that diapausing insects are heavier than their non-diapausing counterparts, we found diapausing pupae weighed less than non-diapausing pupae, especially when larvae received limited food. We found light pupae did not abort their diapause program. In both diapausing and non-diapausing pupae, body weight was positively correlated with simulated winter survival. However, above a weight threshold, body weight no longer affected simulated winter survival in diapausing pupae. Contrary to our predictions and the general consensus in much of the diapause literature, we also found that lighter pupae stayed in diapause longer than heavier pupae. Overall, our results challenge the precept that body weight and diapause are positively associated. The relationship between body weight and diapause is complex and may be affected by the availability of food before and after winter, the availability of high-quality overwintering sites, and the life history of a particular insect.
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Affiliation(s)
- Clancy A Short
- Department of Entomology and Nematology The University of Florida Gainesville Florida USA
| | - Jared L Walters
- Department of Entomology and Nematology The University of Florida Gainesville Florida USA
| | - Daniel A Hahn
- Department of Entomology and Nematology The University of Florida Gainesville Florida USA
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Beranek MD, Giayetto O, Fischer S, Diaz A. Assessment of Mayaro virus vector competence of the mosquito Aedes aegypti (Linnaeus, 1762) populations in Argentine using dose-response assays. MEDICAL AND VETERINARY ENTOMOLOGY 2024; 38:234-243. [PMID: 38489505 DOI: 10.1111/mve.12712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 02/23/2024] [Indexed: 03/17/2024]
Abstract
Mayaro virus (MAYV; Alphavirus: Togaviridae) is an emerging pathogen in Latin America, causing fever and polyarthritis. Sporadic outbreaks of MAYV have occurred in the region, with reported human cases being imported to Europe and North America. Although primarily a risk for those residing in the Amazon basin's tropical forests, recent reports highlight that urbanization would increase the risk of MAYV transmission in Latin America. Urban emergence depends on human susceptibility and the ability of mosquitos like Aedes aegypti (Linnaeus, 1762) (Diptera: Culicidae) to transmit MAYV. Despite the absence of active MAYV transmission in Argentine, the risk of introduction is substantial due to human movement and the presence of Ae. aegypti in the region. This study aimed to evaluate the susceptibility of different Argentine Ae. aegypti populations to MAYV genotype L (MAYV-L) using dose-response assays and determine barriers to virus infection, dissemination and transmission. Immature mosquito stages were collected in Buenos Aires, Córdoba and Rosario cities. Female Ae. aegypti (F2) were orally infected by feeding on five concentrations of MAYV-L, ranging from 1.0 to 6.0 log10 PFU/mL. Abdomens, legs and saliva were analysed using viral plaque assays. Results revealed that MAYV-L between infection and dissemination were associated with viral doses rather than the population origin. Infection rates varied between 3% and 65%, with a 50% infectious dose >5.5 log10 PFU/mL. Dissemination occurred at 39%, with a 50% dissemination dose of ~6.0 log10 PFU/mL. Dissemination among infected mosquitoes ranged from 60% to 86%, and transmission from disseminated mosquitoes ranged from 11% to 20%. Argentine Ae. aegypti populations exhibited a need for higher viral doses of MAYV-L than those typically found in humans to become infected. In addition, only a small proportion of infected mosquitoes were capable of transmitting the virus. Understanding MAYV transmission in urban areas is crucial for public health interventions.
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Affiliation(s)
- Mauricio Daniel Beranek
- Laboratorio de Arbovirus, Instituto de Virología "Dr. J. M. Vanella", Facultad de Medicina, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Octavio Giayetto
- Laboratorio de Arbovirus, Instituto de Virología "Dr. J. M. Vanella", Facultad de Medicina, Universidad Nacional de Córdoba, Córdoba, Argentina
- Instituto de Investigaciones Biológicas y Tecnológicas, CONICET-Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Sylvia Fischer
- Departamento de Ecología, Genética y Evolución Instituto de Ecología, Genética y Evolución de Buenos Aires, Facultad de Ciencias Exactas Físicas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Adrián Diaz
- Laboratorio de Arbovirus, Instituto de Virología "Dr. J. M. Vanella", Facultad de Medicina, Universidad Nacional de Córdoba, Córdoba, Argentina
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Ackerman JT, Peterson SH, Herzog MP, Yee JL. Methylmercury Effects on Birds: A Review, Meta-Analysis, and Development of Toxicity Reference Values for Injury Assessment Based on Tissue Residues and Diet. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2024; 43:1195-1241. [PMID: 38682592 DOI: 10.1002/etc.5858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 11/08/2023] [Accepted: 02/20/2024] [Indexed: 05/01/2024]
Abstract
Birds are used as bioindicators of environmental mercury (Hg) contamination, and toxicity reference values are needed for injury assessments. We conducted a comprehensive review, summarized data from 168 studies, performed a series of Bayesian hierarchical meta-analyses, and developed new toxicity reference values for the effects of methylmercury (MeHg) on birds using a benchmark dose analysis framework. Lethal and sublethal effects of MeHg on birds were categorized into nine biologically relevant endpoint categories and three age classes. Effective Hg concentrations where there was a 10% reduction (EC10) in the production of juvenile offspring (0.55 µg/g wet wt adult blood-equivalent Hg concentrations, 80% credible interval: [0.33, 0.85]), histology endpoints (0.49 [0.15, 0.96] and 0.61 [0.09, 2.48]), and biochemical markers (0.77 [<0.25, 2.12] and 0.57 [0.35, 0.92]) were substantially lower than those for survival (2.97 [2.10, 4.73] and 5.24 [3.30, 9.55]) and behavior (6.23 [1.84, >13.42] and 3.11 [2.10, 4.64]) of juveniles and adults, respectively. Within the egg age class, survival was the most sensitive endpoint (EC10 = 2.02 µg/g wet wt adult blood-equivalent Hg concentrations [1.39, 2.94] or 1.17 µg/g fresh wet wt egg-equivalent Hg concentrations [0.80, 1.70]). Body morphology was not particularly sensitive to Hg. We developed toxicity reference values using a combined survival and reproduction endpoints category for juveniles, because juveniles were more sensitive to Hg toxicity than eggs or adults. Adult blood-equivalent Hg concentrations (µg/g wet wt) and egg-equivalent Hg concentrations (µg/g fresh wet wt) caused low injury to birds (EC1) at 0.09 [0.04, 0.17] and 0.04 [0.01, 0.08], moderate injury (EC5) at 0.6 [0.37, 0.84] and 0.3 [0.17, 0.44], high injury (EC10) at 1.3 [0.94, 1.89] and 0.7 [0.49, 1.02], and severe injury (EC20) at 3.2 [2.24, 4.78] and 1.8 [1.28, 2.79], respectively. Maternal dietary Hg (µg/g dry wt) caused low injury to juveniles at 0.16 [0.05, 0.38], moderate injury at 0.6 [0.29, 1.03], high injury at 1.1 [0.63, 1.87], and severe injury at 2.4 [1.42, 4.13]. We found few substantial differences in Hg toxicity among avian taxonomic orders, including for controlled laboratory studies that injected Hg into eggs. Our results can be used to quantify injury to birds caused by Hg pollution. Environ Toxicol Chem 2024;43:1195-1241. Published 2024. This article is a U.S. Government work and is in the public domain in the USA. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.
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Affiliation(s)
- Joshua T Ackerman
- US Geological Survey, Western Ecological Research Center, Dixon Field Station, Dixon, California, USA
| | - Sarah H Peterson
- US Geological Survey, Western Ecological Research Center, Dixon Field Station, Dixon, California, USA
| | - Mark P Herzog
- US Geological Survey, Western Ecological Research Center, Dixon Field Station, Dixon, California, USA
| | - Julie L Yee
- US Geological Survey, Western Ecological Research Center, Santa Cruz Field Station, Santa Cruz, California, USA
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Hamilton R, Jacobs JL, McCoy AG, Kelly HM, Bradley CA, Malvick DK, Rojas JA, Chilvers MI. Multistate Sensitivity Monitoring of Fusarium virguliforme to the SDHI Fungicides Fluopyram and Pydiflumetofen in the United States. PLANT DISEASE 2024; 108:1602-1611. [PMID: 38127633 DOI: 10.1094/pdis-11-23-2465-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
Sudden death syndrome (SDS), caused by Fusarium virguliforme, is an important yield-limiting disease of soybean (Glycine max). From 1996 to 2022, cumulative yield losses attributed to SDS in North America totaled over 25 million metric tons, which was valued at over US $7.8 billion. Seed treatments are widely used to manage SDS by reducing early season soybean root infection by F. virguliforme. Fluopyram (succinate dehydrogenase inhibitor [SDHI] - FRAC 7), a fungicide seed treatment for SDS management, has been registered for use on soybean in the United States since 2014. A baseline sensitivity study conducted in 2014 evaluated 130 F. virguliforme isolates collected from five states to fluopyram in a mycelial growth inhibition assay and reported a mean EC50 of 3.35 mg/liter. This baseline study provided the foundation for the objectives of this research: to detect any statistically significant change in fluopyram sensitivity over time and geographical regions within the United States and to investigate sensitivity to the fungicide pydiflumetofen. We repeated fluopyram sensitivity testing on a panel of 80 historical F. virguliforme isolates collected from 2006 to 2013 (76 of which were used in the baseline study) and conducted testing on 123 contemporary isolates collected from 2016 to 2022 from 11 states. This study estimated a mean absolute EC50 of 3.95 mg/liter in isolates collected from 2006 to 2013 and a mean absolute EC50 of 4.19 mg/liter in those collected in 2016 to 2022. There was no significant change in fluopyram sensitivity (P = 0.1) identified between the historical and contemporary isolates. A subset of 23 isolates, tested against pydiflumetofen under the same conditions, estimated an absolute mean EC50 of 0.11 mg/liter. Moderate correlation was detected between fluopyram and pydiflumetofen sensitivity estimates (R = 0.53; P < 0.001). These findings enable future fluopyram and pydiflumetofen resistance monitoring and inform current soybean SDS management strategies in a regional and national context.
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Affiliation(s)
- Ryan Hamilton
- Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824
| | - Janette L Jacobs
- Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824
| | - Austin G McCoy
- Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824
| | - Heather M Kelly
- Department of Entomology and Plant Pathology, The University of Tennessee Institute of Agriculture, Jackson, TN 38301
| | - Carl A Bradley
- Department of Plant Pathology, University of Kentucky, Princeton, KY 42445
| | - Dean K Malvick
- Department of Plant Pathology, University of Minnesota, St. Paul, MN 55108
| | - J Alejandro Rojas
- Department of Entomology and Plant Pathology, University of Arkansas, Fayetteville, AR 72701
| | - Martin I Chilvers
- Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824
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Velasquez X, Morov AR, Astrahan P, Tchernov D, Meron D, Almeda R, Rubin-Blum M, Rahav E, Guy-Haim T. Bioconcentration and lethal effects of gas-condensate and crude oil on nearshore copepod assemblages. MARINE POLLUTION BULLETIN 2024; 203:116402. [PMID: 38701601 DOI: 10.1016/j.marpolbul.2024.116402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Revised: 04/16/2024] [Accepted: 04/18/2024] [Indexed: 05/05/2024]
Abstract
The progressive establishment of gas platforms and increasing petroleum accidents pose a threat to zooplankton communities and thus to pelagic ecosystems. This study is the first to compare the impacts of gas-condensate and crude oil on copepod assemblages. We conducted microcosm experiments simulating slick scenarios at five different concentrations of gas-condensate and crude oil to determine and compare their lethal effects and the bioconcentration of low molecular weight polycyclic aromatic hydrocarbons (LMW-PAHs) in eastern Mediterranean coastal copepod assemblages. We found that gas-condensate had a two-times higher toxic effect than crude oil, significantly reducing copepod survival with increased exposure levels. The LMW-PAHs bioconcentration factor was 1-2 orders of magnitude higher in copepods exposed to gas-condensate than in those exposed to crude oil. The median lethal concentration (LC50) was significantly lower in calanoids vs. cyclopoid copepods, suggesting that calanoids are more susceptible to gas-condensate and crude oil pollution, with potential trophic implications.
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Affiliation(s)
- Ximena Velasquez
- National Institute of Oceanography, Israel Oceanographic and Limnological Research (IOLR), Haifa, Israel; Department of Marine Biology, Leon H. Charney School of Marine Sciences, University of Haifa, Israel
| | - Arseniy R Morov
- National Institute of Oceanography, Israel Oceanographic and Limnological Research (IOLR), Haifa, Israel
| | - Peleg Astrahan
- The Yigal Alon Kinneret Limnological Laboratory (KKL), Israel Oceanographic and Limnological Research, Israel
| | - Dan Tchernov
- Department of Marine Biology, Leon H. Charney School of Marine Sciences, University of Haifa, Israel
| | - Dalit Meron
- Department of Marine Biology, Leon H. Charney School of Marine Sciences, University of Haifa, Israel
| | - Rodrigo Almeda
- University of las Palmas of Gran Canaria, 35017 Las Palmas de Gran Canaria, Spain
| | - Maxim Rubin-Blum
- National Institute of Oceanography, Israel Oceanographic and Limnological Research (IOLR), Haifa, Israel; Department of Marine Biology, Leon H. Charney School of Marine Sciences, University of Haifa, Israel
| | - Eyal Rahav
- National Institute of Oceanography, Israel Oceanographic and Limnological Research (IOLR), Haifa, Israel
| | - Tamar Guy-Haim
- National Institute of Oceanography, Israel Oceanographic and Limnological Research (IOLR), Haifa, Israel.
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37
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Leach J, Suber HN, Banks E, Kaskocsak A, Valencia H, Hames B, Rivera R, Colette S, Kendall RJ. In Vitro Lethality of Fenbendazole to the Eyeworm Oxyspirura petrowi. Animals (Basel) 2024; 14:1659. [PMID: 38891706 PMCID: PMC11171062 DOI: 10.3390/ani14111659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 04/12/2024] [Accepted: 04/18/2024] [Indexed: 06/21/2024] Open
Abstract
Oxyspirura petrowi is a heteroxenous nematode that infects the harderian gland and other ocular tissues in birds. High-intensity infections often cause damage to the infected tissues. Due to the nature of the infection sites, treatment of O. petrowi in these hosts can be difficult. Fenbendazole (FBZ) is a common anthelmintic used to treat birds for helminth infections; however, little information exists as to the efficacy of the drug on O. petrowi infections. The present study aims to estimate lethal concentrations of FBZ to O. petrowi. Adult O. petrowi were maintained in vitro and exposed to doses of 5, 50, 100, and 200 µM concentrations of FBZ and included both negative and vehicle controls. Exposure lasted 7.5 days and lethality was determined for each treatment. Negative and vehicle controls did not differ, and both had 75% survival at the end of the treatment period. The percentage survivorship in ascending order of concentration, corrected for the controls, was 66.67%, 44.44%, 33.33%, and 0%. LC10, LC50, and LC90 estimates were 7.5 ± 0.26, 49.1 ± 1.69, and 163.2 ± 5.63 µM, respectively. In the context of known pharmacokinetics of FBZ in birds, a single oral dose of FBZ can achieve exposure levels that are lethal to O. petrowi, but the drug does not stay in the system long enough. Thus, treatment of O. petrowi infections will require multiple oral doses over several days.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Ronald J. Kendall
- Wildlife Toxicology Laboratory, Texas Tech University, 1234 Davis Dr., Lubbock, TX 79416, USA
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Gafni R, Nassar JA, Matzrafi M, Blank L, Eizenberg H. Unraveling the reasons for failure to control Amaranthus albus: insights into herbicide application at different growth stages, temperature effect, and herbicide resistance on a regional scale. PEST MANAGEMENT SCIENCE 2024. [PMID: 38809094 DOI: 10.1002/ps.8192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Revised: 04/16/2024] [Accepted: 05/11/2024] [Indexed: 05/30/2024]
Abstract
BACKGROUND This study investigates factors contributing Amaranthus albus control failure in processing tomato fields in northern Israel. The study region is characterized by a significant climate gradient from east to west, providing the opportunity to investigate the effect of critical elements of the agricultural environment, e.g., temperature. Eight populations were collected from commercial fields in this region. Post-emergence herbicide efficacy of metribuzin, a photosystem II inhibitor, and rimsulfuron, an acetolactate synthase (ALS) inhibitor, was assessed through dose-response analyses at various growth stages. Temperature effects on control efficacy and resistance mechanisms were also explored. RESULTS Standard metribuzin dose (X) was ineffective on A. albus plants with more than six true-leaves, whereas 2X dose proved effective. Rimsulfuron at 16X dose was ineffective on plants with more than four true-leaves. We report here the first case of target site resistance to ALS inhibitors in A. albus, due to point mutation in the ALS gene (Pro197 to Leu). Furthermore, our findings suggest potential involvement of CYT P450 enzymes in enhanced metabolizing of rimsulfuron. An overall decrease in dry weight was observed in response to both herbicides at 16/22 °C (P < 0.0001). Rimsulfuron was effective against only one population when applied at 28/34 °C. A possible fitness cost associated with target site-resistant biotypes was observed under low temperature conditions, leading to effective control. CONCLUSION This regional-scale study highlights the challenges faced by growers, emphasizes the need for adapting management practices to the local climatic conditions and lays the groundwork for implementing location-specific weed management strategies in commercial fields. © 2024 The Author(s). Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Roni Gafni
- The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, The Hebrew University of Jerusalem, Rehovot, Israel
- Department of Plant Pathology and Weed Research, Agricultural Research Organization (ARO)-Volcani Institute, Newe Ya'ar Research Center, Ramat Yishay, Israel
| | - Jackline Abu Nassar
- Department of Plant Pathology and Weed Research, Agricultural Research Organization (ARO)-Volcani Institute, Newe Ya'ar Research Center, Ramat Yishay, Israel
| | - Maor Matzrafi
- Department of Plant Pathology and Weed Research, Agricultural Research Organization (ARO)-Volcani Institute, Newe Ya'ar Research Center, Ramat Yishay, Israel
| | - Lior Blank
- Department of Plant Pathology and Weed Research, ARO, Volcani Center, Rishon LeZion, Israel
| | - Hanan Eizenberg
- Department of Plant Pathology and Weed Research, Agricultural Research Organization (ARO)-Volcani Institute, Newe Ya'ar Research Center, Ramat Yishay, Israel
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Ye T, Mishra AK, Banday S, Li R, Hu K, Coleman MM, Shan Y, Chowdhury SR, Zhou L, Pak ML, Simone TM, Malonia SK, Zhu LJ, Kelliher MA, Green MR. Identification of WNK1 as a therapeutic target to suppress IgH/MYC expression in multiple myeloma. Cell Rep 2024; 43:114211. [PMID: 38722741 DOI: 10.1016/j.celrep.2024.114211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 03/10/2024] [Accepted: 04/23/2024] [Indexed: 06/01/2024] Open
Abstract
Multiple myeloma (MM) remains an incurable hematological malignancy demanding innovative therapeutic strategies. Targeting MYC, the notorious yet traditionally undruggable oncogene, presents an appealing avenue. Here, using a genome-scale CRISPR-Cas9 screen, we identify the WNK lysine-deficient protein kinase 1 (WNK1) as a regulator of MYC expression in MM cells. Genetic and pharmacological inhibition of WNK1 reduces MYC expression and, further, disrupts the MYC-dependent transcriptional program. Mechanistically, WNK1 inhibition attenuates the activity of the immunoglobulin heavy chain (IgH) enhancer, thus reducing MYC transcription when this locus is translocated near the MYC locus. WNK1 inhibition profoundly impacts MM cell behaviors, leading to growth inhibition, cell-cycle arrest, senescence, and apoptosis. Importantly, the WNK inhibitor WNK463 inhibits MM growth in primary patient samples as well as xenograft mouse models and exhibits synergistic effects with various anti-MM compounds. Collectively, our study uncovers WNK1 as a potential therapeutic target in MM.
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Affiliation(s)
- Tianyi Ye
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA.
| | - Alok K Mishra
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Shahid Banday
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Rui Li
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Kai Hu
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Madison M Coleman
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Yi Shan
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Shreya Roy Chowdhury
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Lin Zhou
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Magnolia L Pak
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Tessa M Simone
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Sunil K Malonia
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Lihua Julie Zhu
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Michelle A Kelliher
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Michael R Green
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
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40
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Tavakoli N, Fong EJ, Coleman A, Huang YK, Bigger M, Doche ME, Kim S, Lenz HJ, Graham NA, Macklin P, Finley SD, Mumenthaler SM. Merging Metabolic Modeling and Imaging for Screening Therapeutic Targets in Colorectal Cancer. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.24.595756. [PMID: 38826317 PMCID: PMC11142224 DOI: 10.1101/2024.05.24.595756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2024]
Abstract
Cancer-associated fibroblasts (CAFs) play a key role in metabolic reprogramming and are well-established contributors to drug resistance in colorectal cancer (CRC). To exploit this metabolic crosstalk, we integrated a systems biology approach that identified key metabolic targets in a data-driven method and validated them experimentally. This process involved high-throughput computational screening to investigate the effects of enzyme perturbations predicted by a computational model of CRC metabolism to understand system-wide effects efficiently. Our results highlighted hexokinase (HK) as one of the crucial targets, which subsequently became our focus for experimental validation using patient-derived tumor organoids (PDTOs). Through metabolic imaging and viability assays, we found that PDTOs cultured in CAF conditioned media exhibited increased sensitivity to HK inhibition. Our approach emphasizes the critical role of integrating computational and experimental techniques in exploring and exploiting CRC-CAF crosstalk.
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Affiliation(s)
- Niki Tavakoli
- Alfred E. Mann Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, 90089, USA
| | - Emma J. Fong
- Ellison Institute of Technology, Los Angeles, CA, 90064, USA
| | - Abigail Coleman
- Ellison Institute of Technology, Los Angeles, CA, 90064, USA
| | - Yu-Kai Huang
- Ellison Institute of Technology, Los Angeles, CA, 90064, USA
| | - Mathias Bigger
- Ellison Institute of Technology, Los Angeles, CA, 90064, USA
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
| | | | - Seungil Kim
- Ellison Institute of Technology, Los Angeles, CA, 90064, USA
| | - Heinz-Josef Lenz
- Division of Medical Oncology, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, 90033, USA
| | - Nicholas A. Graham
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
| | - Paul Macklin
- Department of Intelligent Systems Engineering, Indiana University, Bloomington, IN, 46202, USA
| | - Stacey D. Finley
- Alfred E. Mann Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, 90089, USA
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
- Department of Quantitative and Computational Biology, University of Southern California, Los Angeles, CA, 90089, USA
| | - Shannon M. Mumenthaler
- Alfred E. Mann Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, 90089, USA
- Ellison Institute of Technology, Los Angeles, CA, 90064, USA
- Division of Medical Oncology, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, 90033, USA
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41
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Bovier M, Camenzind DW, Brown AF, Jeker L, Retschnig G, Neumann P, Straub L. Colony environment and absence of brood enhance tolerance to a neonicotinoid in winter honey bee workers, Apis mellifera. ECOTOXICOLOGY (LONDON, ENGLAND) 2024:10.1007/s10646-024-02758-8. [PMID: 38780664 DOI: 10.1007/s10646-024-02758-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/09/2024] [Indexed: 05/25/2024]
Abstract
In eusocial insects, worker longevity is essential to ensure colony survival in brood-free periods. Trade-offs between longevity and other traits may render long-living workers in brood-free periods more susceptible to pesticides compared to short-lived ones. Further, colony environment (e.g., adequate nutrition) may enable workers to better cope with pesticides, yet data comparing long vs. short-living workers and the role of the colony environment for pesticide tolerance are scarce. Here, we show that long-living honey bee workers, Apis mellifera, are less susceptible to the neonicotinoid thiamethoxam than short-lived workers, and that susceptibility was further reduced when workers were acclimatized under colony compared to laboratory conditions. Following an OECD protocol, freshly-emerged workers were exposed to thiamethoxam in summer and winter and either acclimatized within their colony or in the laboratory. Mortality and sucrose consumption were measured daily and revealed that winter workers were significantly less susceptible than summer workers, despite being exposed to higher thiamethoxam dosages due to increased food consumption. Disparencies in fat body activity, which is key for detoxification, may explain why winter bees were less susceptible. Furthermore, colony acclimatization significantly reduced susceptibility towards thiamethoxam in winter workers likely due to enhanced protein nutrition. Brood absence and colony environment seem to govern workers' ability to cope with pesticides, which should be considered in risk assessments. Since honey bee colony losses occur mostly over winter, long-term studies assessing the effects of pesticide exposure on winter bees are required to better understand the underlying mechanisms.
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Affiliation(s)
- Manon Bovier
- Institute of Bee Health, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Domenic W Camenzind
- Institute of Bee Health, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Andrew F Brown
- Institute of Bee Health, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- University of Freiburg, Freiburg, Switzerland
| | - Lukas Jeker
- Swiss Bee Research Centre, Agroscope, Bern, Switzerland
| | - Gina Retschnig
- Institute of Bee Health, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Peter Neumann
- Institute of Bee Health, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Lars Straub
- Institute of Bee Health, Vetsuisse Faculty, University of Bern, Bern, Switzerland.
- Faculty of Science, Energy and Environment, King Mongkut's University of Technology North Bangkok, Rayong Campus, Rayong, Thailand.
- Centre for Ecology, Evolution, and Behaviour, Department of Biological Sciences, Royal Holloway University of London, Egham, UK.
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42
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Schoellerman J, Lord B, Bhattacharya A, Stenne B, Wall JL, Rech J, Letavic M, Bonaventure P, Balana B. Characterization of tritiated JNJ-GluN2B-5 (3-[ 3H] 1-(azetidin-1-yl)-2-(6-(4-fluoro-3-methyl-phenyl)pyrrolo[3,2-b]pyridin-1-yl)ethanone), a high affinity GluN2B radioligand with selectivity over sigma receptors. J Neurochem 2024. [PMID: 38770633 DOI: 10.1111/jnc.16129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 03/22/2024] [Accepted: 04/22/2024] [Indexed: 05/22/2024]
Abstract
Here, we describe the characterization of a radioligand selective for GluN2B-containing NMDA receptors, 3-[3H] 1-(azetidin-1-yl)-2-(6-(4-fluoro-3-methyl-phenyl)pyrrolo[3,2-b]pyridin-1-yl)ethanone ([3H]-JNJ- GluN2B-5). In rat cortical membranes, the compound bound to a single site, and the following kinetic parameters were measured; association rate constant Kon = 0.0066 ± 0.0006 min-1 nM-1, dissociation rate constant Koff = 0.0210 ± 0.0001 min-1 indicating calculated KD = Koff/Kon = 3.3 ± 0.4 nM, (mean ± SEM, n = 3). The equilibrium dissociation constant determined from saturation binding experiments in rat cortex was KD of 2.6 ± 0.3 nM (mean ± SEM, n = 3). In contrast to the widely used GluN2B radioligand [3H]-Ro 25-6981, whose affinity Ki for sigma 1 and sigma 2 receptors are 2 and 189 nM, respectively, [3H]-JNJ-GluN2B-5 exhibits no measurable affinity for sigma 1 and sigma 2 receptors (Ki > 10 μM for both) providing distinct selectivity advantages. Anatomical distribution of [3H]-JNJ-GluN2B-5 binding sites in rat, mouse, dog, monkey, and human brain tissue was studied using in vitro autoradiography, which showed high specific binding in the hippocampus and cortex and negligible binding in the cerebellum. Enhanced selectivity for GluN2B-containing receptors translated to a good signal-to-noise ratio in both in vitro radioligand binding and in vitro autoradiography assays. In conclusion, [3H]-JNJ-GluN2B-5 is a high-affinity GluN2B radioligand with excellent signal-to-noise ratio and unprecedented selectivity.
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Affiliation(s)
- Jeffrey Schoellerman
- Neuroscience Discovery, Janssen Research & Development, LLC, La Jolla, California, USA
| | - Brian Lord
- Neuroscience Discovery, Janssen Research & Development, LLC, La Jolla, California, USA
| | - Anindya Bhattacharya
- Neuroscience Discovery, Janssen Research & Development, LLC, La Jolla, California, USA
| | - Brice Stenne
- Neuroscience Discovery, Janssen Research & Development, LLC, La Jolla, California, USA
| | - Jessica L Wall
- Neuroscience Discovery, Janssen Research & Development, LLC, La Jolla, California, USA
| | - Jason Rech
- Neuroscience Discovery, Janssen Research & Development, LLC, La Jolla, California, USA
| | - Michael Letavic
- Neuroscience Discovery, Janssen Research & Development, LLC, La Jolla, California, USA
| | - Pascal Bonaventure
- Neuroscience Discovery, Janssen Research & Development, LLC, La Jolla, California, USA
| | - Bartosz Balana
- Neuroscience Discovery, Janssen Research & Development, LLC, La Jolla, California, USA
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43
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Brunet-Ratnasingham E, Morin S, Randolph HE, Labrecque M, Bélair J, Lima-Barbosa R, Pagliuzza A, Marchitto L, Hultström M, Niessl J, Cloutier R, Sreng Flores AM, Brassard N, Benlarbi M, Prévost J, Ding S, Anand SP, Sannier G, Marks A, Wågsäter D, Bareke E, Zeberg H, Lipcsey M, Frithiof R, Larsson A, Zhou S, Nakanishi T, Morrison D, Vezina D, Bourassa C, Gendron-Lepage G, Medjahed H, Point F, Richard J, Larochelle C, Prat A, Cunningham JL, Arbour N, Durand M, Richards JB, Moon K, Chomont N, Finzi A, Tétreault M, Barreiro L, Wolf G, Kaufmann DE. Sustained IFN signaling is associated with delayed development of SARS-CoV-2-specific immunity. Nat Commun 2024; 15:4177. [PMID: 38755196 DOI: 10.1038/s41467-024-48556-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 05/06/2024] [Indexed: 05/18/2024] Open
Abstract
Plasma RNAemia, delayed antibody responses and inflammation predict COVID-19 outcomes, but the mechanisms underlying these immunovirological patterns are poorly understood. We profile 782 longitudinal plasma samples from 318 hospitalized patients with COVID-19. Integrated analysis using k-means reveals four patient clusters in a discovery cohort: mechanically ventilated critically-ill cases are subdivided into good prognosis and high-fatality clusters (reproduced in a validation cohort), while non-critical survivors segregate into high and low early antibody responders. Only the high-fatality cluster is enriched for transcriptomic signatures associated with COVID-19 severity, and each cluster has distinct RBD-specific antibody elicitation kinetics. Both critical and non-critical clusters with delayed antibody responses exhibit sustained IFN signatures, which negatively correlate with contemporaneous RBD-specific IgG levels and absolute SARS-CoV-2-specific B and CD4+ T cell frequencies. These data suggest that the "Interferon paradox" previously described in murine LCMV models is operative in COVID-19, with excessive IFN signaling delaying development of adaptive virus-specific immunity.
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Affiliation(s)
- Elsa Brunet-Ratnasingham
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, QC, Canada
- Department of Medicine, University of California, San Francisco, CA, USA
| | - Sacha Morin
- Department of Computer Science and Operations Research, Université de Montréal, Montreal, QC, Canada
- Mila-Quebec AI Institute, Montreal, QC, Canada
| | - Haley E Randolph
- Committee on Genetics, Genomics, and Systems Biology, University of Chicago, Chicago, IL, USA
| | - Marjorie Labrecque
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
- Bioinformatics Program, Department of Biochemistry and Molecular Medicine, Université de Montréal, Montreal, QC, Canada
| | - Justin Bélair
- Department of Mathematics and Statistics, Université de Montréal, Montreal, QC, Canada
- Independent Data Scientist, JB Consulting, Montreal, QC, H3S1K8, Canada
| | - Raphaël Lima-Barbosa
- Department of Mathematics and Statistics, Université de Montréal, Montreal, QC, Canada
- Independent Data Scientist, JB Consulting, Montreal, QC, H3S1K8, Canada
| | - Amélie Pagliuzza
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Lorie Marchitto
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, QC, Canada
| | - Michael Hultström
- Anaesthesiology and Intensive Care Medicine, Department of Surgical Sciences, Uppsala University, Uppsala, Sweden.
- Integrative Physiology, Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden.
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, QC, Canada.
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, QC, Canada.
| | - Julia Niessl
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, QC, Canada
- BioNTech SE, Mainz, Germany
| | - Rose Cloutier
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Alina M Sreng Flores
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Nathalie Brassard
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Mehdi Benlarbi
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, QC, Canada
| | - Jérémie Prévost
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, QC, Canada
| | - Shilei Ding
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Sai Priya Anand
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, QC, Canada
| | - Gérémy Sannier
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, QC, Canada
| | - Amanda Marks
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Dick Wågsäter
- Integrative Physiology, Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden
| | - Eric Bareke
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Hugo Zeberg
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Miklos Lipcsey
- Anaesthesiology and Intensive Care Medicine, Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
- Hedenstierna Laboratory, Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
| | - Robert Frithiof
- Anaesthesiology and Intensive Care Medicine, Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
| | - Anders Larsson
- Clinical Chemistry, Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Sirui Zhou
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, QC, Canada
- Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - Tomoko Nakanishi
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, QC, Canada
- Department of Human Genetics, McGill University, Montreal, QC, Canada
- Kyoto-McGill International Collaborative School in Genomic Medicine, Gaduate School of Medicine, Kyoto University, Kyoto, Japan
- Research Fellow, Japan Society for the Promotion of Science, Tokyo, Japan
| | - David Morrison
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, QC, Canada
| | - Dani Vezina
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, QC, Canada
| | - Catherine Bourassa
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Gabrielle Gendron-Lepage
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Halima Medjahed
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Floriane Point
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Jonathan Richard
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Catherine Larochelle
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
- Department of Neurosciences, Université de Montréal, Montreal, QC, Canada
| | - Alexandre Prat
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
- Department of Neurosciences, Université de Montréal, Montreal, QC, Canada
| | - Janet L Cunningham
- Department of Medical Sciences, Psychiatry, Uppsala University, Uppsala, Sweden
| | - Nathalie Arbour
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
- Department of Neurosciences, Université de Montréal, Montreal, QC, Canada
| | - Madeleine Durand
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
- Centre Hospitalier de l'Université de Montréal (CHUM), Montreal, QC, Canada
| | - J Brent Richards
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, QC, Canada
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, QC, Canada
- Department of Human Genetics, McGill University, Montreal, QC, Canada
- Department of Twin Research, King's College London, London, UK
| | - Kevin Moon
- Department of Mathematics and Statistics, Utah State University, Logan, UT, USA
| | - Nicolas Chomont
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, QC, Canada
| | - Andrés Finzi
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, QC, Canada
- Department of Microbiology and Immunology, McGill University, Montreal, QC, H3A 2B4, Canada
| | - Martine Tétreault
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
- Department of Neurosciences, Université de Montréal, Montreal, QC, Canada
| | - Luis Barreiro
- Committee on Genetics, Genomics, and Systems Biology, University of Chicago, Chicago, IL, USA
- Section of Genetic Medicine, Department of Medicine, University of Chicago, Chicago, IL, USA
- Committee on Immunology, University of Chicago, Chicago, IL, USA
| | - Guy Wolf
- Department of Computer Science and Operations Research, Université de Montréal, Montreal, QC, Canada.
- Mila-Quebec AI Institute, Montreal, QC, Canada.
- Department of Mathematics and Statistics, Université de Montréal, Montreal, QC, Canada.
| | - Daniel E Kaufmann
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada.
- Département de Médecine, Université de Montréal, Montreal, QC, Canada.
- Division of Infectious Diseases, Department of Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland.
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44
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Nicholson MD, Anderson CJ, Odom DT, Aitken SJ, Taylor MS. DNA lesion bypass and the stochastic dynamics of transcription-coupled repair. Proc Natl Acad Sci U S A 2024; 121:e2403871121. [PMID: 38717857 PMCID: PMC11098089 DOI: 10.1073/pnas.2403871121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Accepted: 04/09/2024] [Indexed: 05/18/2024] Open
Abstract
DNA base damage is a major source of oncogenic mutations and disruption to gene expression. The stalling of RNA polymerase II (RNAP) at sites of DNA damage and the subsequent triggering of repair processes have major roles in shaping the genome-wide distribution of mutations, clearing barriers to transcription, and minimizing the production of miscoded gene products. Despite its importance for genetic integrity, key mechanistic features of this transcription-coupled repair (TCR) process are controversial or unknown. Here, we exploited a well-powered in vivo mammalian model system to explore the mechanistic properties and parameters of TCR for alkylation damage at fine spatial resolution and with discrimination of the damaged DNA strand. For rigorous interpretation, a generalizable mathematical model of DNA damage and TCR was developed. Fitting experimental data to the model and simulation revealed that RNA polymerases frequently bypass lesions without triggering repair, indicating that small alkylation adducts are unlikely to be an efficient barrier to gene expression. Following a burst of damage, the efficiency of transcription-coupled repair gradually decays through gene bodies with implications for the occurrence and accurate inference of driver mutations in cancer. The reinitation of transcription from the repair site is not a general feature of transcription-coupled repair, and the observed data is consistent with reinitiation never taking place. Collectively, these results reveal how the directional but stochastic activity of TCR shapes the distribution of mutations following DNA damage.
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Affiliation(s)
- Michael D. Nicholson
- Cancer Research United Kingdom Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, EdinburghEH4 2XU, United Kingdom
| | - Craig J. Anderson
- Medical Research Council Human Genetics Unit, Institute of Genetics and Cancer, University of Edinburgh, EdinburghEH4 2XU, United Kingdom
| | - Duncan T. Odom
- Division of Regulatory Genomics and Cancer Evolution (B270), German Cancer Research Center, Heidelberg69120, Germany
- Cancer Research United Kingdom Cambridge Institute, University of Cambridge, CambridgeCB2 0RE, United Kingdom
| | - Sarah J. Aitken
- Cancer Research United Kingdom Cambridge Institute, University of Cambridge, CambridgeCB2 0RE, United Kingdom
- Medical Research Council Toxicology Unit, University of Cambridge, CambridgeCB2 1QR, United Kingdom
- Department of Histopathology, Cambridge University Hospitals National Health Service Foundation Trust, CambridgeCB2 0QQ, United Kingdom
| | - Martin S. Taylor
- Medical Research Council Human Genetics Unit, Institute of Genetics and Cancer, University of Edinburgh, EdinburghEH4 2XU, United Kingdom
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Correa Velez KE, Alam M, Baalousha MA, Norman RS. Wildfire Ashes from the Wildland-Urban Interface Alter Vibrio vulnificus Growth and Gene Expression. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:8169-8181. [PMID: 38690750 DOI: 10.1021/acs.est.3c08658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
Climate change-induced stressors are contributing to the emergence of infectious diseases, including those caused by marine bacterial pathogens such as Vibrio spp. These stressors alter Vibrio temporal and geographical distribution, resulting in increased spread, exposure, and infection rates, thus facilitating greater Vibrio-human interactions. Concurrently, wildfires are increasing in size, severity, frequency, and spread in the built environment due to climate change, resulting in the emission of contaminants of emerging concern. This study aimed to understand the potential effects of urban interface wildfire ashes on Vibrio vulnificus (V. vulnificus) growth and gene expression using transcriptomic approaches. V. vulnificus was exposed to structural and vegetation ashes and analyzed to identify differentially expressed genes using the HTSeq-DESeq2 strategy. Exposure to wildfire ash altered V. vulnificus growth and gene expression, depending on the trace metal composition of the ash. The high Fe content of the vegetation ash enhanced bacterial growth, while the high Cu, As, and Cr content of the structural ash suppressed growth. Additionally, the overall pattern of upregulated genes and pathways suggests increased virulence potential due to the selection of metal- and antibiotic-resistant strains. Therefore, mixed fire ashes transported and deposited into coastal zones may lead to the selection of environmental reservoirs of Vibrio strains with enhanced antibiotic resistance profiles, increasing public health risk.
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Affiliation(s)
- Karlen Enid Correa Velez
- Department of Environmental Health Sciences, University of South Carolina, 921 Assembly St., Suite 401, Columbia, South Carolina 29208, United States
- NIEHS Center for Oceans and Human Health and Climate Change Interactions, University of South Carolina, 921 Assembly St., Suite 401, Columbia, South Carolina 29208, United States
| | - Mahbub Alam
- Department of Environmental Health Sciences, University of South Carolina, 921 Assembly St., Suite 401, Columbia, South Carolina 29208, United States
- Center for Environmental Nanoscience and Risk, University of South Carolina, 921 Assembly St., Suite 401, Columbia, South Carolina 29208, United States
| | - Mohammed A Baalousha
- Department of Environmental Health Sciences, University of South Carolina, 921 Assembly St., Suite 401, Columbia, South Carolina 29208, United States
- Center for Environmental Nanoscience and Risk, University of South Carolina, 921 Assembly St., Suite 401, Columbia, South Carolina 29208, United States
| | - R Sean Norman
- Department of Environmental Health Sciences, University of South Carolina, 921 Assembly St., Suite 401, Columbia, South Carolina 29208, United States
- NIEHS Center for Oceans and Human Health and Climate Change Interactions, University of South Carolina, 921 Assembly St., Suite 401, Columbia, South Carolina 29208, United States
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46
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Thiel D, Yañez Guerra LA, Kieswetter A, Cole AG, Temmerman L, Technau U, Jékely G. Large-scale deorphanization of Nematostella vectensis neuropeptide G protein-coupled receptors supports the independent expansion of bilaterian and cnidarian peptidergic systems. eLife 2024; 12:RP90674. [PMID: 38727714 PMCID: PMC11087051 DOI: 10.7554/elife.90674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2024] Open
Abstract
Neuropeptides are ancient signaling molecules in animals but only few peptide receptors are known outside bilaterians. Cnidarians possess a large number of G protein-coupled receptors (GPCRs) - the most common receptors of bilaterian neuropeptides - but most of these remain orphan with no known ligands. We searched for neuropeptides in the sea anemone Nematostella vectensis and created a library of 64 peptides derived from 33 precursors. In a large-scale pharmacological screen with these peptides and 161 N. vectensis GPCRs, we identified 31 receptors specifically activated by 1 to 3 of 14 peptides. Mapping GPCR and neuropeptide expression to single-cell sequencing data revealed how cnidarian tissues are extensively connected by multilayer peptidergic networks. Phylogenetic analysis identified no direct orthology to bilaterian peptidergic systems and supports the independent expansion of neuropeptide signaling in cnidarians from a few ancestral peptide-receptor pairs.
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Affiliation(s)
- Daniel Thiel
- Living Systems Institute, University of ExeterExeterUnited Kingdom
| | | | - Amanda Kieswetter
- Animal Physiology & Neurobiology, Department of Biology, University of LeuvenLeuvenBelgium
| | - Alison G Cole
- Department of Neurosciences and Developmental Biology, Faculty of Life Sciences, University of ViennaViennaAustria
| | - Liesbet Temmerman
- Animal Physiology & Neurobiology, Department of Biology, University of LeuvenLeuvenBelgium
| | - Ulrich Technau
- Department of Neurosciences and Developmental Biology, Faculty of Life Sciences, University of ViennaViennaAustria
| | - Gáspár Jékely
- Living Systems Institute, University of ExeterExeterUnited Kingdom
- Centre for Organismal Studies (COS), Heidelberg UniversityHeidelbergGermany
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47
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Tjeerdema E, Lee Y, Metry R, Hamdoun A. Semi-automated, high-content imaging of drug transporter knockout sea urchin (Lytechinus pictus) embryos. JOURNAL OF EXPERIMENTAL ZOOLOGY. PART B, MOLECULAR AND DEVELOPMENTAL EVOLUTION 2024; 342:313-329. [PMID: 38087422 DOI: 10.1002/jez.b.23231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 11/08/2023] [Accepted: 11/19/2023] [Indexed: 05/01/2024]
Abstract
A defining feature of sea urchins is their extreme fecundity. Urchins produce millions of transparent, synchronously developing embryos, ideal for spatial and temporal analysis of development. This biological feature has been effectively utilized for ensemble measurement of biochemical changes. However, it has been underutilized in imaging studies, where single embryo measurements are used. Here we present an example of how stable genetics and high content imaging, along with machine learning-based image analysis, can be used to exploit the fecundity and synchrony of sea urchins in imaging-based drug screens. Building upon our recently created sea urchin ABCB1 knockout line, we developed a high-throughput assay to probe the role of this drug transporter in embryos. We used high content imaging to compare accumulation and toxicity of canonical substrates and inhibitors of the transporter, including fluorescent molecules and antimitotic cancer drugs, in homozygous knockout and wildtype embryos. To measure responses from the resulting image data, we used a nested convolutional neural network, which rapidly classified embryos according to fluorescence or cell division. This approach identified sea urchin embryos with 99.8% accuracy and determined two-cell and aberrant embryos with 96.3% and 89.1% accuracy, respectively. The results revealed that ABCB1 knockout embryos accumulated the transporter substrate calcein 3.09 times faster than wildtypes. Similarly, knockouts were 4.71 and 3.07 times more sensitive to the mitotic poisons vinblastine and taxol. This study paves the way for large scale pharmacological screens in the sea urchin embryo.
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Affiliation(s)
- Evan Tjeerdema
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California, USA
| | - Yoon Lee
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California, USA
| | - Rachel Metry
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California, USA
| | - Amro Hamdoun
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California, USA
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48
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McCarthy JS, Brown KE, King CK, Nielsen UN, Plaisted K, Wallace SMN, Reichman SM. Population growth of two limno-terrestrial Antarctic microinvertebrates in different aqueous soil media. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:33086-33097. [PMID: 38676867 PMCID: PMC11133119 DOI: 10.1007/s11356-024-32905-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 03/10/2024] [Indexed: 04/29/2024]
Abstract
Terrestrial microinvertebrates provide important carbon and nutrient cycling roles in soil environments, particularly in Antarctica where larger macroinvertebrates are absent. The environmental preferences and ecology of rotifers and tardigrades in terrestrial environments, including in Antarctica, are not as well understood as their temperate aquatic counterparts. Developing laboratory cultures is critical to provide adequate numbers of individuals for controlled laboratory experimentation. In this study, we explore aspects of optimising laboratory culturing for two terrestrially sourced Antarctic microinvertebrates, a rotifer (Habrotrocha sp.) and a tardigrade (Acutuncus antarcticus). We tested a soil elutriate and a balanced salt solution (BSS) to determine their suitability as culturing media. Substantial population growth of rotifers and tardigrades was observed in both media, with mean rotifer population size increasing from 5 to 448 ± 95 (soil elutriate) and 274 ± 78 (BSS) individuals over 60 days and mean tardigrade population size increasing from 5 to 187 ± 65 (soil elutriate) and 138 ± 37 (BSS) over 160 days. We also tested for optimal dilution of soil elutriate in rotifer cultures, with 20-80% dilutions producing the largest population growth with the least variation in the 40% dilution after 36 days. Culturing methods developed in this study are recommended for use with Antarctica microinvertebrates and may be suitable for similar limno-terrestrial microinvertebrates from other regions.
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Affiliation(s)
- Jordan S McCarthy
- Centre for Anthropogenic Pollution Impact and Management (CAPIM), University of Melbourne, Parkville, VIC, 3010, Australia
- School of BioSciences, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Kathryn E Brown
- Environmental Stewardship Program, Australian Antarctic Division, 203 Channel Highway, Kingston, TAS, 7050, Australia
| | - Catherine K King
- Environmental Stewardship Program, Australian Antarctic Division, 203 Channel Highway, Kingston, TAS, 7050, Australia
| | - Uffe N Nielsen
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2750, Australia
| | - Katie Plaisted
- Centre for Anthropogenic Pollution Impact and Management (CAPIM), University of Melbourne, Parkville, VIC, 3010, Australia
- School of BioSciences, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Stephanie M N Wallace
- Centre for Anthropogenic Pollution Impact and Management (CAPIM), University of Melbourne, Parkville, VIC, 3010, Australia
- School of BioSciences, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Suzie M Reichman
- Centre for Anthropogenic Pollution Impact and Management (CAPIM), University of Melbourne, Parkville, VIC, 3010, Australia.
- School of BioSciences, University of Melbourne, Parkville, VIC, 3010, Australia.
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49
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Wang Y, Jin L, Belušič G, Beukeboom LW, Wertheim B, Hut RA. Circadian entrainment to red-light Zeitgebers and action spectrum for entrainment in the jewel wasp Nasonia vitripennis. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2024; 210:459-472. [PMID: 37735210 PMCID: PMC11106113 DOI: 10.1007/s00359-023-01672-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 08/26/2023] [Accepted: 09/01/2023] [Indexed: 09/23/2023]
Abstract
Light is the most important environmental cue for the circadian system of most organisms to stay synchronized to daily environmental changes. Like many other insects, the wasp Nasonia vitripennis has trichromatic compound eye-based colour vision and is sensitive to the light spectrum ranging from UV to green. We recently described a red-sensitive, ocelli-based photoreceptor, but its contribution to circadian entrainment remains unclear. In this study, we investigated the possibility of Nasonia circadian light entrainment under long-wavelength red LED light-dark cycles and characterized the strength of red light as a potential Zeitgeber. Additionally, we measured the possibility of entrainment under various light intensities (from 5·1012 to 4·1015 photons·cm-2·s-1) and a broader range of wavelengths (455-656 nm) to construct corresponding action spectra for characterizing all circadian photoreceptors involved in photic entrainment. We also conducted electroretinogram (ERG) recordings for each wavelength in the compound eyes. Our findings demonstrate that Nasonia can entrain under red light dark cycles, and the sensory pathway underlying the red-light Zeitgeber response may reside in the ocelli. Combined with findings from previous research, we pose that blue- and green-sensitive rhodopsin photoreceptor cells function as the major circadian photoreceptors in both circadian entrainment by light-dark cycles and circadian phase shifts by light pulses, whereas the red-sensitive photoreceptor cell requires higher light intensity for its role in circadian entrainment by light-dark cycles.
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Affiliation(s)
- Yifan Wang
- Groningen Institute for Evolutionary Life Sciences, University of Groningen, 9712 CP, Groningen, the Netherlands.
| | - Lijing Jin
- Groningen Institute for Evolutionary Life Sciences, University of Groningen, 9712 CP, Groningen, the Netherlands
| | - Gregor Belušič
- Department of Biology, Biotechnical Faculty, University of Ljubljana, 1000, Ljubljana, Slovenia
| | - Leo W Beukeboom
- Groningen Institute for Evolutionary Life Sciences, University of Groningen, 9712 CP, Groningen, the Netherlands
| | - Bregje Wertheim
- Groningen Institute for Evolutionary Life Sciences, University of Groningen, 9712 CP, Groningen, the Netherlands.
| | - Roelof A Hut
- Groningen Institute for Evolutionary Life Sciences, University of Groningen, 9712 CP, Groningen, the Netherlands
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50
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Poudel B, Mullins J, Fiedler JD, Zhong S. Genome-Wide Association Study of Fungicide Sensitivity in a Fusarium graminearum Population Collected from North Dakota. PHYTOPATHOLOGY 2024; 114:1088-1096. [PMID: 38079375 DOI: 10.1094/phyto-05-23-0180-kc] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/23/2024]
Abstract
Fusarium head blight is a destructive disease of small grains. The disease is predominantly caused by the haploid ascomycete fungus Fusarium graminearum in North America. To understand the genetics of quantitative traits for sensitivity to fungicides in this fungal pathogen, we conducted a genome-wide association study of sensitivity to two demethylation inhibition class fungicides, tebuconazole and prothioconazole, using an F. graminearum population of 183 isolates collected between 1981 and 2013 from North Dakota. Baseline sensitivity to tebuconazole and prothioconazole was established using 21 isolates collected between 1981 and 1994. Most fungal isolates were sensitive to both tebuconazole and prothioconazole; however, five isolates showed significantly reduced sensitivity to prothioconazole. The genome-wide association study identified one significant marker-trait association on chromosome 3 for tebuconazole resistance, whereas six significant marker-trait associations, one on chromosome 1, three on chromosome 2, and two on chromosome 4, were detected for prothioconazole resistance. Functional annotation of the marker-trait association for tebuconazole revealed a candidate gene encoding a basic helix-loop-helix domain-containing protein that reinforces sterol in the fungal membrane. Putative genes for prothioconazole resistance were also identified, which are involved in RNA interference, the detoxification by ubiquitin-proteasome pathway, and membrane integrity reinforcement. Considering the potential of the pathogen toward overcoming chemical control, continued monitoring of fungal sensitivities to commercially applied fungicides, especially those containing prothioconazole, is warranted to reduce risks of fungicide resistance in the pathogen populations.
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Affiliation(s)
- Bikash Poudel
- Department of Plant Pathology, North Dakota State University, Fargo, ND 58102
| | - Joseph Mullins
- Department of Plant Pathology, North Dakota State University, Fargo, ND 58102
| | - Jason D Fiedler
- Cereal Crops Research Unit, Edward T. Schafer Agricultural Research Center, U.S. Department of Agriculture-Agricultural Research Service, Fargo, ND 58102
| | - Shaobin Zhong
- Department of Plant Pathology, North Dakota State University, Fargo, ND 58102
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