1451
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Kerins MJ, Milligan J, Wohlschlegel JA, Ooi A. Fumarate hydratase inactivation in hereditary leiomyomatosis and renal cell cancer is synthetic lethal with ferroptosis induction. Cancer Sci 2018; 109:2757-2766. [PMID: 29917289 PMCID: PMC6125459 DOI: 10.1111/cas.13701] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 06/17/2018] [Indexed: 12/31/2022] Open
Abstract
Hereditary leiomyomatosis and renal cell cancer (HLRCC) is a hereditary cancer syndrome characterized by inactivation of the Krebs cycle enzyme fumarate hydratase (FH). HLRCC patients are at high risk of developing kidney cancer of type 2 papillary morphology that is refractory to current radiotherapy, immunotherapy and chemotherapy. Hence, an effective therapy for this deadly form of cancer is urgently needed. Here, we show that FH inactivation (FH-/- ) proves synthetic lethal with inducers of ferroptosis, an iron-dependent and nonapoptotic form of cell death. Specifically, we identified gene signatures for compound sensitivities based on drug responses for 9 different drug classes against the NCI-60 cell lines. These signatures predicted that ferroptosis inducers would be selectively toxic to FH-/- cell line UOK262. Preferential cell death against UOK262-FH-/- was confirmed with 4 different ferroptosis inducers. Mechanistically, the FH-/- sensitivity to ferroptosis is attributed to dysfunctional GPX4, the primary cellular defender against ferroptosis. We identified that C93 of GPX4 is readily post-translationally modified by fumarates that accumulate in conditions of FH-/- , and that C93 modification represses GPX4 activity. Induction of ferroptosis in FH-inactivated tumors represents an opportunity for synthetic lethality in cancer.
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Affiliation(s)
- Michael J. Kerins
- Department of Pharmacology and ToxicologyCollege of PharmacyUniversity of ArizonaTucsonAZUSA
| | - John Milligan
- Department of Pharmacology and ToxicologyCollege of PharmacyUniversity of ArizonaTucsonAZUSA
| | - James A. Wohlschlegel
- Department of Biological ChemistryDavid Geffen School of MedicineUniversity of CaliforniaLos AngelesCAUSA
| | - Aikseng Ooi
- Department of Pharmacology and ToxicologyCollege of PharmacyUniversity of ArizonaTucsonAZUSA
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1452
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Efficiency of Target Larvicides Is Conditioned by ABC-Mediated Transport in the Zoonotic Nematode Anisakis pegreffii. Antimicrob Agents Chemother 2018; 62:AAC.00916-18. [PMID: 29987147 DOI: 10.1128/aac.00916-18] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 07/05/2018] [Indexed: 12/21/2022] Open
Abstract
Anisakiasis is among the most significant emerging foodborne parasitoses contracted through consumption of thermally unprocessed seafood harboring infective Anisakis species larvae. The efficacy of the currently applied anthelminthic therapy in humans and in model organisms has not proven sufficient, so alternative solutions employing natural compounds combined with chemical inhibitors should be explored. By testing toxicity of the natural monoterpenes nerolidol and farnesol and the conventional anthelminthics abamectin and levamisole in the presence/absence of MK-571 and Valspodar, which inhibit the ABC transporter proteins multidrug resistance protein (MRP-like) and P-glycoprotein (P-gp), we determined the preliminary traits of Anisakis detoxifying mechanisms. We found that Anisakis P-gp and MRP-like transporters have a role in the efflux of the tested compounds, which could be useful in the design of novel anthelminthic strategies. As expected, transporter activation and efflux fluctuated over time; they were synchronously active very early postexposure, whereas the activity of one transporter dominated over the other in a time-dependent manner. MRP-like transporters dominated in the efflux of farnesol, and P-gp dominated in efflux of nerolidol, while both were active in effluxing levamisole. The highest toxicity was exerted by abamectin, a P-gp inhibitor per se, which also elicited the highest oxidative stress in treated Anisakis larvae. We suggest that β-tubulin, observed for the first time as a core element in Anisakis cuticle, might represent an important target for the tested compounds.
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1453
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A novel multi-parametric high content screening assay in ciPTEC-OAT1 to predict drug-induced nephrotoxicity during drug discovery. Arch Toxicol 2018; 92:3175-3190. [PMID: 30155723 DOI: 10.1007/s00204-018-2284-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 08/06/2018] [Indexed: 12/11/2022]
Abstract
Drug-induced nephrotoxicity is a major concern in the clinic and hampers the use of available treatments as well as the development of innovative medicines. It is typically discovered late during drug development, which reflects a lack of in vitro nephrotoxicity assays available that can be employed readily in early drug discovery, to identify and hence steer away from the risk. Here, we report the development of a high content screening assay in ciPTEC-OAT1, a proximal tubular cell line that expresses several relevant renal transporters, using five fluorescent dyes to quantify cell health parameters. We used a validation set of 62 drugs, tested across a relevant concentration range compared to their exposure in humans, to develop a model that integrates multi-parametric data and drug exposure information, which identified most proximal tubular toxic drugs tested (sensitivity 75%) without any false positives (specificity 100%). Due to the relatively high throughput (straight-forward assay protocol, 96-well format, cost-effective) the assay is compatible with the needs in the early drug discovery setting to enable identification, quantification and subsequent mitigation of the risk for nephrotoxicity.
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1454
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Ehrenkaufer GM, Suresh S, Solow-Cordero D, Singh U. High-Throughput Screening of Entamoeba Identifies Compounds Which Target Both Life Cycle Stages and Which Are Effective Against Metronidazole Resistant Parasites. Front Cell Infect Microbiol 2018; 8:276. [PMID: 30175074 PMCID: PMC6107840 DOI: 10.3389/fcimb.2018.00276] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Accepted: 07/25/2018] [Indexed: 12/31/2022] Open
Abstract
Neglected tropical diseases, especially those caused by parasites, are significantly underserved by current drug development efforts, mostly due to the high costs and low economic returns. One method for lowering the costs of drug discovery and development for these diseases is to repurpose drugs developed for other indications. Here, we present the results of a screen of five repurposed drug libraries to identify potential new lead compounds to treat amebiasis, a disease that affects tens of millions of people and causes ~100,000 deaths annually. E. histolytica, the causative agent of amebiasis, has two major life cycle stages, the trophozoite and the cyst. The current primary treatment for amebiasis, nitroimidazole compounds, do not eliminate parasites from the colonic lumen, necessitating a multi-drug treatment regimen. We aimed to address this problem by screening against both life stages, with the aim of identifying a single drug that targets both. We successfully identified eleven compounds with activity against both cysts and trophozoites, as well as multiple compounds that killed trophozoites with improved efficacy over existing drugs. Two lead compounds (anisomycin and prodigiosin) were further characterized for activity against metronidazole (MNZ) resistant parasites and mature cysts. Anisomycin and prodigiosin were both able to kill MNZ resistant parasites while prodigiosin and its analog obatoclax were active against mature cysts. This work confirms the feasibility of identifying drugs that target both Entamoeba trophozoites and cysts, and is an important step toward developing improved treatment regimens for Entamoeba infection.
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Affiliation(s)
- Gretchen M. Ehrenkaufer
- Division of Infectious Diseases, Department of Internal Medicine, Stanford University School of Medicine, Stanford, CA, United States
| | - Susmitha Suresh
- Division of Infectious Diseases, Department of Internal Medicine, Stanford University School of Medicine, Stanford, CA, United States
| | - David Solow-Cordero
- High-Throughput Bioscience Center, Department of Chemical and Systems Biology, Stanford University, Stanford, CA, United States
| | - Upinder Singh
- Division of Infectious Diseases, Department of Internal Medicine, Stanford University School of Medicine, Stanford, CA, United States
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA, United States
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1455
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Ward MJ, Ellsworth SA, Hogan MP, Nystrom GS, Martinez P, Budhdeo A, Zelaya R, Perez A, Powell B, He H, Rokyta DR. Female-biased population divergence in the venom of the Hentz striped scorpion (Centruroides hentzi). Toxicon 2018; 152:137-149. [PMID: 30096334 DOI: 10.1016/j.toxicon.2018.07.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 06/27/2018] [Accepted: 07/31/2018] [Indexed: 11/16/2022]
Abstract
Sex-biased genes are expressed at higher levels in one sex and contribute to phenotypic differences between males and females, as well as overall phenotypic variation within and among populations. Venom has evolved primarily for predation and defense, making venom expression a highly variable phenotype as a result of local adaptation. Several scorpion species have shown both intraspecific and intersexual venom variation, and males have been observed using venom in courtship and mating, suggesting the existence of venom-specific, sex-biased genes that may contribute to population divergence. We used reversed-phase high-performance liquid chromatography (RP-HPLC), Agilent protein bioanalyzer chips, nano-liquid chromatography mass spectrometry (nLC/MS/MS), and median lethal dose (LD50) assays in fruit flies (Drosophila melanogaster) and banded crickets (Gryllodes sigillatus) to investigate proteomic and functional venom variation within and among three Florida populations of the Hentz striped scorpion (Centruroides hentzi). We found significant venom variation among populations, with females, not males, being responsible for this divergence. We also found significant variation in venom expression within populations, with males contributing more to within population variation than females. Our results provide evidence that male and female scorpions experience different natural and sexual selective pressures that have led to the expression of sex-biased venom genes and that these genes may be consequential in population divergence.
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Affiliation(s)
- Micaiah J Ward
- Department of Biological Science, Florida State University, Tallahassee, FL, 32306, USA
| | - Schyler A Ellsworth
- Department of Biological Science, Florida State University, Tallahassee, FL, 32306, USA
| | - Michael P Hogan
- Department of Biological Science, Florida State University, Tallahassee, FL, 32306, USA
| | - Gunnar S Nystrom
- Department of Biological Science, Florida State University, Tallahassee, FL, 32306, USA
| | - Paul Martinez
- Department of Biological Science, Florida State University, Tallahassee, FL, 32306, USA
| | - Amisha Budhdeo
- Department of Biological Science, Florida State University, Tallahassee, FL, 32306, USA
| | - Roxana Zelaya
- Department of Biological Science, Florida State University, Tallahassee, FL, 32306, USA
| | - Alexander Perez
- Department of Biological Science, Florida State University, Tallahassee, FL, 32306, USA
| | - Barclay Powell
- Department of Biological Science, Florida State University, Tallahassee, FL, 32306, USA
| | - Huan He
- Institute of Molecular Biophysics and College of Medicine, Florida State University, Tallahassee, FL, 32306, USA
| | - Darin R Rokyta
- Department of Biological Science, Florida State University, Tallahassee, FL, 32306, USA.
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1456
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Vasileiadis S, Brunetti G, Marzouk E, Wakelin S, Kowalchuk GA, Lombi E, Donner E. Silver Toxicity Thresholds for Multiple Soil Microbial Biomarkers. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:8745-8755. [PMID: 29949713 DOI: 10.1021/acs.est.8b00677] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Material flow analysis shows that soil is a key repository for silver (Ag) from (nano)silver-functionalized consumer products, but the potential effects of Ag toxicity, via Ag+ release, on soil microbial communities and their ecosystem services remains largely unknown. We examined the responses of multiple microbial biomarkers to increasing Ag+ doses (nine concentrations, 0-2000 mg kg-1) in nine different soils representing a wide range of soil properties. Analyses included substrate-induced microbial respiration, nine different soil enzyme activities, and quantification of bacterial 16S-rRNA (SSU) and fungal intergenic spacer (ITS) copies. The resulting half-maximal effective concentrations (EC50) for Ag ranged from ∼1 to >500 mg kg -1 and showed soil-specific responses, including some hormesis-type responses. Carbon cycle-associated enzyme activities (e.g., cellobiohydrolase, xylosidase, and α/β-glucosidase) responded similarly to Ag. Sulfatase and leucine-aminopeptidase activities (linked to the sulfur and nitrogen cycles) were the most sensitive to Ag. Total organic carbon, and to a lesser extent pH, were identified as potentially useful response predictors, but only for some biomarkers; this reflects the complexity of soil Ag chemistry. Our results show Ag toxicity is highly dependent on soil characteristics and the specific microbial parameter under investigation, but end point redundancies also indicated that representative parameters for key microbial functions can be identified for risk assessment purposes. Sulfatase activity may be an important Ag toxicity biomarker; its response was highly sensitive and not correlated with that of other biomarkers.
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Affiliation(s)
- Sotirios Vasileiadis
- Future Industries Institute , University of South Australia , Mawson Lakes 5095 , Australia
- Department of Biochemistry and Biotechnology , University of Thessaly , Biopolis 41500 , Larissa , Greece
| | - Gianluca Brunetti
- Future Industries Institute , University of South Australia , Mawson Lakes 5095 , Australia
| | - Ezzat Marzouk
- Future Industries Institute , University of South Australia , Mawson Lakes 5095 , Australia
- Division of Soil and Water Sciences , Arish University , Dahyet El Salam, El Arish, North Sinai , 31111 , Egypt
| | | | - George A Kowalchuk
- Institute of Environmental Biology , Utrecht University , Utrecht 3584 CH, The Netherlands
| | - Enzo Lombi
- Future Industries Institute , University of South Australia , Mawson Lakes 5095 , Australia
| | - Erica Donner
- Future Industries Institute , University of South Australia , Mawson Lakes 5095 , Australia
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1457
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Amaro-Blanco I, Fernández-Moreno PT, Osuna-Ruiz MD, Bastida F, De Prado R. Mechanisms of glyphosate resistance and response to alternative herbicide-based management in populations of the three Conyza species introduced in southern Spain. PEST MANAGEMENT SCIENCE 2018; 74:1925-1937. [PMID: 29479817 DOI: 10.1002/ps.4896] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 02/06/2018] [Accepted: 02/20/2018] [Indexed: 05/12/2023]
Abstract
BACKGROUND In perennial crops, the most common method of weed control is to spray herbicides, and glyphosate has long been the first choice of farmers. Three species of the genus Conyza are among the most problematic weeds for farmers, exhibiting resistance to glyphosate. The objectives of this study were to evaluate resistance levels and mechanisms, and to test chemical control alternatives in putative resistant (R) populations of Conyza bonariensis, Conyza canadensis and Conyza sumatrensis. RESULTS Plants from the three R populations of Conyza spp. survived high doses of glyphosate compared with plants from susceptible (S) populations. The rate of movement of 14 C glyphosate out of treated leaves in plants from S populations was higher than in plants from R populations. Only plants from the R population of C. sumatrensis contained the known target site 5-enolpyruvylshikimate-3-phosphate synthase mutation Pro106-Thr. Field responses to the different alternative herbicide treatments tested indicated injury and high effectiveness in most cases. CONCLUSIONS The results indicate that non-target site resistant (NTSR) mechanisms explain resistance in C. bonariensis and C. canadensis, whereas both NTSR and target site resistant (TSR) mechanisms contribute to resistance in C. sumatrensis. The results obtained in the field trials suggest that the resistance problem can be solved through integrated weed management. © 2018 Society of Chemical Industry.
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Affiliation(s)
| | | | | | - Fernando Bastida
- Department of Agroforestry Sciences, University of Huelva, Huelva, Spain
| | - Rafael De Prado
- Department of Agricultural Chemistry and Edaphology, University of Cordoba, Cordoba, Spain
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1458
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Abstract
The plant gibberellin receptor GID1 shows sequence similarity to carboxylesterase, suggesting that it is derived from an enzyme. However, how GID1 evolved and was modified is unclear. We identified two amino acids that are essential for GID1 activity, and we found that adjustment of these residues caused GID1 to recognize novel GAs carrying 13-OH as active GAs and to strictly refuse inactive GAs. Phylogenetic analysis of 169 GID1s revealed seven subtypes, and the B-type in core eudicots showed unique characteristics. In fact, certain B-type GID1s showed a higher nonsynonymous-to-synonymous divergence ratio in the region determining GA affinity. Such B-type GID1s with higher affinity were preferentially expressed in the roots in some core eudicot plants and conferred adaptive growth under stress. The plant gibberellin (GA) receptor GID1 shows sequence similarity to carboxylesterase (CXE). Here, we report the molecular evolution of GID1 from establishment to functionally diverse forms in eudicots. By introducing 18 mutagenized rice GID1s into a rice gid1 null mutant, we identified the amino acids crucial for GID1 activity in planta. We focused on two amino acids facing the C2/C3 positions of ent-gibberellane, not shared by lycophytes and euphyllophytes, and found that adjustment of these residues resulted in increased GID1 affinity toward GA4, new acceptance of GA1 and GA3 carrying C13-OH as bioactive ligands, and elimination of inactive GAs. These residues rendered the GA perception system more sophisticated. We conducted phylogenetic analysis of 169 GID1s from 66 plant species and found that, unlike other taxa, nearly all eudicots contain two types of GID1, named A- and B-type. Certain B-type GID1s showed a unique evolutionary characteristic of significantly higher nonsynonymous-to-synonymous divergence in the region determining GA4 affinity. Furthermore, these B-type GID1s were preferentially expressed in the roots of Arabidopsis, soybean, and lettuce and might be involved in root elongation without shoot elongation for adaptive growth under low-temperature stress. Based on these observations, we discuss the establishment and adaption of GID1s during plant evolution.
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1459
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Sørensen-Hygum TL, Stuart RM, Jørgensen A, Møbjerg N. Modelling extreme desiccation tolerance in a marine tardigrade. Sci Rep 2018; 8:11495. [PMID: 30065347 PMCID: PMC6068186 DOI: 10.1038/s41598-018-29824-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 07/18/2018] [Indexed: 11/17/2022] Open
Abstract
It has recently been argued that the enigmatic tardigrades (water bears) will endure until the sun dies, surviving any astrophysical calamities in Earth's oceans. Yet, our knowledge of stress tolerance among marine tardigrade species is very limited and most investigations revolve around species living in moist habitats on land. Here, we investigate desiccation tolerance in the cosmopolitan marine tidal tardigrade, Echiniscoides sigismundi, providing the first thorough analysis on recovery upon desiccation from seawater. We test the influence on survival of desiccation surface, time spent desiccated (up to 1 year) and initial water volume. We propose analysis methods for survival estimates, which can be used as a future platform for evaluating and analysing recovery rates in organisms subjected to extreme stress. Our data reveal that marine tidal tardigrades tolerate extremely rapid and extended periods of desiccation from seawater supporting the argument that these animals are among the toughest organisms on Earth.
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Affiliation(s)
- Thomas L Sørensen-Hygum
- Section for Cell Biology and Physiology, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Robyn M Stuart
- Data Science Laboratory, Department of Mathematical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Aslak Jørgensen
- Section for Cell Biology and Physiology, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Nadja Møbjerg
- Section for Cell Biology and Physiology, Department of Biology, University of Copenhagen, Copenhagen, Denmark.
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1460
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Hayes T, Rumore A, Howard B, He X, Luo M, Wuenschmann S, Chapman M, Kale S, Li L, Kita H, Lawrence CB. Innate Immunity Induced by the Major Allergen Alt a 1 From the Fungus Alternaria Is Dependent Upon Toll-Like Receptors 2/4 in Human Lung Epithelial Cells. Front Immunol 2018; 9:1507. [PMID: 30100902 PMCID: PMC6072870 DOI: 10.3389/fimmu.2018.01507] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 06/18/2018] [Indexed: 12/31/2022] Open
Abstract
Allergens are molecules that elicit a hypersensitive inflammatory response in sensitized individuals and are derived from a variety of sources. Alt a 1 is the most clinically important secreted allergen of the ubiquitous fungus, Alternaria. It has been shown to be a major allergen causing IgE-mediated allergic response in the vast majority of Alternaria-sensitized individuals. However, no studies have been conducted in regards to the innate immune eliciting activities of this clinically relevant protein. In this study, recombinant Alt a 1 was produced, purified, labeled, and incubated with BEAS-2B, NHBE, and DHBE human lung epithelial cells. Alt a 1 elicited strong induction of IL-8, MCP-1, and Gro-a/b/g. Using gene-specific siRNAs, blocking antibodies, and chemical inhibitors such as LPS-RS, it was determined that Alt a 1-induced immune responses were dependent upon toll-like receptors (TLRs) 2 and 4, and the adaptor proteins MYD88 and TIRAP. Studies utilizing human embryonic kidney cells engineered to express single receptors on the cell surface such as TLRs, further confirmed that Alt a 1-induced innate immunity is dependent upon TLR4 and to a lesser extent TLR2.
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Affiliation(s)
- Tristan Hayes
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA, United States
- Department of Pediatrics, School of Medicine, Indiana University Bloomington, Indianapolis, IN, United States
| | - Amanda Rumore
- Department of Biology, Randolph College, Lynchburg, VA, United States
| | - Brad Howard
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA, United States
| | - Xin He
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA, United States
| | - Mengyao Luo
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA, United States
| | | | - Martin Chapman
- Indoor Biotechnologies, Charlottesville, VA, United States
| | - Shiv Kale
- Biocomplexity Institute, Virginia Tech, Blacksburg, VA, United States
| | - Liwu Li
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA, United States
| | - Hirohito Kita
- Division of Allergic Diseases, Internal Medicine, Mayo Clinic, Rochester, MN, United States
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1461
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Goodspeed A, Jean A, Theodorescu D, Costello JC. A Gene Expression Signature Predicts Bladder Cancer Cell Line Sensitivity to EGFR Inhibition. Bladder Cancer 2018; 4:269-282. [PMID: 30112438 PMCID: PMC6087449 DOI: 10.3233/blc-170161] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Background: Bladder cancer remains a cancer type in need of novel and alternative therapies. While multiple inhibitors of EGFR have been evaluated for efficacy in bladder cancer, the results have largely been disappointing with few patients responding to these therapies. Yet, there is a subset of patients that positively responds to EGFR inhibition with tumor shrinkage, indicating it is an effective treatment for a targeted set of bladder tumors. Objective: To derive a gene expression signature capable of predicting the response to EGFR inhibition in bladder cancer cell lines. Methods: he response to cetuximab for 68 colorectal cancer patients was used as training data to generate a gene expression signature. We applied this signature to bladder cancer cell lines and predictions were compared to the responses to seven EGFR inhibitors. Results: A novel 67-gene signature derived from colorectal cancer was able to significantly identify bladder cancer cell lines by their response to several EGFR inhibitors. Conclusions: The 67-gene signature can determine bladder cancer cell line sensitivity to EGFR inhibition. This work demonstrates a preclinical strategy to identify bladder cancer cell lines for EGFR-targeted therapy.
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Affiliation(s)
- Andrew Goodspeed
- Department of Pharmacology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Annie Jean
- Department of Pharmacology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Dan Theodorescu
- Department of Pharmacology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA.,University of Colorado Comprehensive Cancer Center, University of Colorado Anschutz Medical Campus, Aurora, CO, USA.,Department of Surgery (Urology), University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - James C Costello
- Department of Pharmacology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA.,University of Colorado Comprehensive Cancer Center, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
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1462
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Dubois C, Lecomte C, Ruys SPD, Kuzmic M, Della-Vedova C, Dubourg N, Galas S, Frelon S. Precoce and opposite response of proteasome activity after acute or chronic exposure of C. elegans to γ-radiation. Sci Rep 2018; 8:11349. [PMID: 30054490 PMCID: PMC6063909 DOI: 10.1038/s41598-018-29033-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 07/04/2018] [Indexed: 12/14/2022] Open
Abstract
Species are chronically exposed to ionizing radiation, a natural phenomenon which can be enhanced by human activities. The induced toxicity mechanisms still remain unclear and seem depending on the mode of exposure, i.e. acute and chronic. To better understand these phenomena, studies need to be conducted both at the subcellular and individual levels. Proteins, functional molecules in organisms, are the targets of oxidative damage (especially via their carbonylation (PC)) and are likely to be relevant biomarkers. After exposure of Caenorhabditis elegans to either chronic or acute γ rays we showed that hatching success is impacted after acute but not after chronic irradiation. At the molecular level, the carbonylated protein level in relation with dose was slightly different between acute and chronic exposure whereas the proteolytic activity is drastically modified. Indeed, whereas the 20S proteasome activity is inhibited by acute irradiation from 0.5 Gy, it is activated after chronic irradiation from 1 Gy. As expected, the 20S proteasome activity is mainly modified by irradiation whereas the 26S and 30S activity are less changed. This study provides preliminaries clues to understand the role of protein oxidation and proteolytic activity in the radiation-induced molecular mechanisms after chronic versus acute irradiation in C. elegans.
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Affiliation(s)
- Cécile Dubois
- IRSN/PSE-ENV/SRTE - Laboratoire d'ecotoxicologie des radionucléides - BP3, 13115, St Paul lez Durance Cedex, France
| | - Catherine Lecomte
- IRSN/PSE-ENV/SRTE - Laboratoire d'ecotoxicologie des radionucléides - BP3, 13115, St Paul lez Durance Cedex, France
| | - Sébastien Pyr Dit Ruys
- IRSN/PSE-ENV/SRTE - Laboratoire d'ecotoxicologie des radionucléides - BP3, 13115, St Paul lez Durance Cedex, France
| | - Mira Kuzmic
- IRSN/PSE-ENV/SRTE - Laboratoire d'ecotoxicologie des radionucléides - BP3, 13115, St Paul lez Durance Cedex, France
| | | | - Nicolas Dubourg
- IRSN/PSE-ENV/SRTE - Laboratoire d'ecotoxicologie des radionucléides - BP3, 13115, St Paul lez Durance Cedex, France
| | - Simon Galas
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
| | - Sandrine Frelon
- IRSN/PSE-ENV/SRTE - Laboratoire d'ecotoxicologie des radionucléides - BP3, 13115, St Paul lez Durance Cedex, France.
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1463
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Tanner LB, Goglia AG, Wei MH, Sehgal T, Parsons LR, Park JO, White E, Toettcher JE, Rabinowitz JD. Four Key Steps Control Glycolytic Flux in Mammalian Cells. Cell Syst 2018; 7:49-62.e8. [PMID: 29960885 PMCID: PMC6062487 DOI: 10.1016/j.cels.2018.06.003] [Citation(s) in RCA: 220] [Impact Index Per Article: 36.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Revised: 03/29/2018] [Accepted: 06/04/2018] [Indexed: 12/18/2022]
Abstract
Altered glycolysis is a hallmark of diseases including diabetes and cancer. Despite intensive study of the contributions of individual glycolytic enzymes, systems-level analyses of flux control through glycolysis remain limited. Here, we overexpress in two mammalian cell lines the individual enzymes catalyzing each of the 12 steps linking extracellular glucose to excreted lactate, and find substantial flux control at four steps: glucose import, hexokinase, phosphofructokinase, and lactate export (and not at any steps of lower glycolysis). The four flux-controlling steps are specifically upregulated by the Ras oncogene: optogenetic Ras activation rapidly induces the transcription of isozymes catalyzing these four steps and enhances glycolysis. At least one isozyme catalyzing each of these four steps is consistently elevated in human tumors. Thus, in the studied contexts, flux control in glycolysis is concentrated in four key enzymatic steps. Upregulation of these steps in tumors likely underlies the Warburg effect.
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Affiliation(s)
- Lukas Bahati Tanner
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544, USA
| | - Alexander G Goglia
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
| | - Monica H Wei
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544, USA; Department of Chemistry, Princeton University, Princeton, NJ 08544, USA
| | - Talen Sehgal
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544, USA
| | - Lance R Parsons
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544, USA
| | - Junyoung O Park
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544, USA; Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08544, USA
| | - Eileen White
- Rutgers Cancer Institute of New Jersey, New Brunswick, NJ 08903, USA; Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, NJ 08854, USA
| | - Jared E Toettcher
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
| | - Joshua D Rabinowitz
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544, USA; Department of Chemistry, Princeton University, Princeton, NJ 08544, USA.
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1464
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Aránguiz-Acuña A, Pérez-Portilla P, De la Fuente A, Fontaneto D. Life-history strategies in zooplankton promote coexistence of competitors in extreme environments with high metal content. Sci Rep 2018; 8:11060. [PMID: 30038433 PMCID: PMC6056428 DOI: 10.1038/s41598-018-29487-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 07/01/2018] [Indexed: 11/09/2022] Open
Abstract
The toxicity of pollutants on aquatic communities is determined by the specific sensitivities and by the ecological relationships between species, although the role of ecological interactions on the specific sensitivity to pollutants is complex. We tested the effect of exposure to copper on the life-history strategies of two coexisting rotifer species of the genus Brachionus from Inca-Coya lagoon, an isolated water body located in Atacama Desert. The experiments looked at differences in the response to the stress by chemical pollution mimicking field conditions of copper exposure, levels of food, and salinity, between single-species cultures and coexisting species. Under single species cultures, B. ‘Nevada’ had lower densities, growth rates, and resting eggs production than B. quadridentatus; when in competition, B. ‘Nevada’ performed better than B. quadridentatus in most life-history traits. B. ‘Nevada’ was a copper-tolerant species, which outcompeted B. quadridentatus, more copper-sensitive, with higher levels of copper. Species-specific responses to environmental conditions and pollution, plus differential relationships between population density and production of resting eggs, resulted in reduced niche overlap between species, allowing stabilized coexistence. The extreme environmental conditions and the isolation of the Inca-Coya lagoon, make it an excellent model to understand the adaption of aquatic organisms to stressed environments.
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Affiliation(s)
- Adriana Aránguiz-Acuña
- Faculty of Sciences, Chemistry Department, Universidad Católica del Norte, Angamos 0610, Antofagasta, Chile. .,Centro de Investigación Tecnológica del Agua en el Desierto (CEITSAZA), Universidad Católica del Norte, Casilla 1280, Antofagasta, Chile.
| | - Pablo Pérez-Portilla
- Faculty of Sciences, Chemistry Department, Universidad Católica del Norte, Angamos 0610, Antofagasta, Chile
| | - Ana De la Fuente
- Faculty of Sciences, Chemistry Department, Universidad Católica del Norte, Angamos 0610, Antofagasta, Chile
| | - Diego Fontaneto
- National Research Council of Italy, Institute of Ecosystem Study (CNR-ISE). Largo Tonolli 50, I-28922, Verbania, Pallanza (VB), Italy
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1465
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Margres MJ, Wray KP, Hassinger ATB, Ward MJ, McGivern JJ, Moriarty Lemmon E, Lemmon AR, Rokyta DR. Quantity, Not Quality: Rapid Adaptation in a Polygenic Trait Proceeded Exclusively through Expression Differentiation. Mol Biol Evol 2018; 34:3099-3110. [PMID: 28962003 DOI: 10.1093/molbev/msx231] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
A trait's genomic architecture can affect the rate and mechanism of adaptation, and although many ecologically-important traits are polygenic, most studies connecting genotype, phenotype, and fitness in natural populations have focused on traits with relatively simple genetic bases. To understand the genetic basis of polygenic adaptation, we must integrate genomics, phenotypic data, ecology, and fitness effects for a genetically tractable, polygenic trait; snake venoms provide such a system for studying polygenic adaptation because of their genetic tractability and vital ecological role in feeding and defense. We used a venom transcriptome-proteome map, quantitative proteomics, genomics, and fitness assays in sympatric prey to construct a genotype-phenotype-fitness map for the venoms of an island-mainland pair of rattlesnake populations. Reciprocal fitness experiments demonstrated that each population was locally adapted to sympatric prey. We identified significant expression differentiation with little to no coding-sequence variation across populations, demonstrating that expression differentiation was exclusively the genetic basis of polygenic adaptation. Previous research on the genetics of adaptation, however, has largely been biased toward investigating protein-coding regions because of the complexity of gene regulation. Our results showed that biases at the molecular level can be in the opposite direction, highlighting the need for more systematic comparisons of different molecular mechanisms underlying rapid, adaptive evolution in polygenic traits.
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Affiliation(s)
- Mark J Margres
- Department of Biological Science, Florida State University, Tallahassee, FL
| | - Kenneth P Wray
- Department of Biological Science, Florida State University, Tallahassee, FL
| | | | - Micaiah J Ward
- Department of Biological Science, Florida State University, Tallahassee, FL
| | - James J McGivern
- Department of Biological Science, Florida State University, Tallahassee, FL
| | | | - Alan R Lemmon
- Department of Scientific Computing, Florida State University, Tallahassee, FL
| | - Darin R Rokyta
- Department of Biological Science, Florida State University, Tallahassee, FL
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1466
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Aspatwar A, Becker HM, Parvathaneni NK, Hammaren M, Svorjova A, Barker H, Supuran CT, Dubois L, Lambin P, Parikka M, Parkkila S, Winum JY. Nitroimidazole-based inhibitors DTP338 and DTP348 are safe for zebrafish embryos and efficiently inhibit the activity of human CA IX in Xenopus oocytes. J Enzyme Inhib Med Chem 2018; 33:1064-1073. [PMID: 29909747 PMCID: PMC6009478 DOI: 10.1080/14756366.2018.1482285] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Carbonic anhydrase (CA) IX is a hypoxia inducible enzyme that is highly expressed in solid tumours. Therefore, it has been considered as an anticancer target using specific chemical inhibitors. The nitroimidazoles DTP338 and DTP348 have been shown to inhibit CA IX in nanomolar range in vitro and reduce extracellular acidification in hypoxia, and impair tumour growth. We screened these compounds for toxicity using zebrafish embryos and measured their in vivo effects on human CA IX in Xenopus oocytes. In the toxicity screening, the LD50 for both compounds was 3.5 mM. Neither compound showed apparent toxicity below 300 µM concentration. Above this concentration, both compounds altered the movement of zebrafish larvae. The IC50 was 0.14 ± 0.02 µM for DTP338 and 19.26 ± 1.97 µM for DTP348, suggesting that these compounds efficiently inhibit CA IX in vivo. Our results suggest that these compounds can be developed as drugs for cancer therapy.
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Affiliation(s)
- Ashok Aspatwar
- a Faculty of Medicine and Life Sciences , University of Tampere , Tampere , Finland
| | - Holger M Becker
- b Department of Physiological Chemistry , University of Veterinary Medicine Hannover , Hannover , Germany
| | - Nanda Kumar Parvathaneni
- c Department of Radiotherapy, The M-Lab Group, GROW - School for Oncology and Developmental Biology , Maastricht University Medical Centre , Maastricht , The Netherlands.,d Institut des Biomolécules Max Mousseron (IBMM) UMR 5247 CNRS, ENSCM , Université de Montpellier , Montpellier Cedex 05 , France
| | - Milka Hammaren
- a Faculty of Medicine and Life Sciences , University of Tampere , Tampere , Finland
| | - Aleksandra Svorjova
- a Faculty of Medicine and Life Sciences , University of Tampere , Tampere , Finland
| | - Harlan Barker
- a Faculty of Medicine and Life Sciences , University of Tampere , Tampere , Finland
| | - Claudiu T Supuran
- e NEUROFARBA Department, Section of Pharmaceutical and Nutraceutical Sciences , University of Florence , Polo Scientifico , Firenze , Italy
| | - Ludwig Dubois
- c Department of Radiotherapy, The M-Lab Group, GROW - School for Oncology and Developmental Biology , Maastricht University Medical Centre , Maastricht , The Netherlands
| | - Philippe Lambin
- c Department of Radiotherapy, The M-Lab Group, GROW - School for Oncology and Developmental Biology , Maastricht University Medical Centre , Maastricht , The Netherlands
| | - Mataleena Parikka
- a Faculty of Medicine and Life Sciences , University of Tampere , Tampere , Finland
| | - Seppo Parkkila
- a Faculty of Medicine and Life Sciences , University of Tampere , Tampere , Finland.,f Fimlab Ltd. and Tampere University Hospital , Tampere , Finland
| | - Jean-Yves Winum
- d Institut des Biomolécules Max Mousseron (IBMM) UMR 5247 CNRS, ENSCM , Université de Montpellier , Montpellier Cedex 05 , France
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1467
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Partridge FA, Forman R, Willis NJ, Bataille CJR, Murphy EA, Brown AE, Heyer-Chauhan N, Marinič B, Sowood DJC, Wynne GM, Else KJ, Russell AJ, Sattelle DB. 2,4-Diaminothieno[3,2-d]pyrimidines, a new class of anthelmintic with activity against adult and egg stages of whipworm. PLoS Negl Trop Dis 2018; 12:e0006487. [PMID: 29995893 PMCID: PMC6062138 DOI: 10.1371/journal.pntd.0006487] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 07/26/2018] [Accepted: 05/01/2018] [Indexed: 11/29/2022] Open
Abstract
The human whipworm Trichuris trichiura is a parasite that infects around 500 million people globally, with consequences including damage to physical growth and educational performance. Current drugs such as mebendazole have a notable lack of efficacy against whipworm, compared to other soil-transmitted helminths. Mass drug administration programs are therefore unlikely to achieve eradication and new treatments for trichuriasis are desperately needed. All current drug control strategies focus on post-infection eradication, targeting the parasite in vivo. Here we propose developing novel anthelmintics which target the egg stage of the parasite in the soil as an adjunct environmental strategy. As evidence in support of such an approach we describe the actions of a new class of anthelmintic compounds, the 2,4-diaminothieno[3,2-d]pyrimidines (DATPs). This compound class has found broad utility in medicinal chemistry, but has not previously been described as having anthelmintic activity. Importantly, these compounds show efficacy against not only the adult parasite, but also both the embryonated and unembryonated egg stages and thereby may enable a break in the parasite lifecycle. The human whipworm, Trichuris trichiura, infects around 500 million people globally, impacting on their physical growth and educational performance. There are currently huge mass drug administration (MDA) programs aiming to control whipworm, along with the other major soil transmitted helminths, Ascaris and hookworm. However single doses of albendazole and mebendazole, which are used in MDA, have particularly poor effectiveness against whipworm, with cure rates less than 40%. This means that MDA may not be able to control and eliminate whipworm infection, and risks the spread of resistance to albendazole and mebendazole in the parasite population. We are attempting to develop new treatments for parasitic worm infection, particularly focused on whipworm. We report the identification of a class of compounds, diaminothienopyrimidines (DATPs), which have not previously been described as anthelmintics. These compounds are effective against adult stages of whipworm, and also block the development of the model nematode C. elegans. Our DATP compounds reduce the ability of treated eggs to successfully establish infection in a mouse model of human whipworm. These results support a potential environmental spray to control whipworm by targeting the infectious egg stage in environmental hotspots.
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Affiliation(s)
- Frederick A. Partridge
- Centre for Respiratory Biology, UCL Respiratory, Division of Medicine, University College London, London, United Kingdom
| | - Ruth Forman
- Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom
| | - Nicky J. Willis
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford, United Kingdom
| | - Carole J. R. Bataille
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford, United Kingdom
| | - Emma A. Murphy
- Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom
| | - Anwen E. Brown
- Centre for Respiratory Biology, UCL Respiratory, Division of Medicine, University College London, London, United Kingdom
| | - Narinder Heyer-Chauhan
- Centre for Respiratory Biology, UCL Respiratory, Division of Medicine, University College London, London, United Kingdom
| | - Bruno Marinič
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford, United Kingdom
| | - Daniel J. C. Sowood
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford, United Kingdom
| | - Graham M. Wynne
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford, United Kingdom
| | - Kathryn J. Else
- Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom
- * E-mail: (DBS); (KJE); (AJR)
| | - Angela J. Russell
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford, United Kingdom
- Department of Pharmacology, University of Oxford, Oxford, United Kingdom
- * E-mail: (DBS); (KJE); (AJR)
| | - David B. Sattelle
- Centre for Respiratory Biology, UCL Respiratory, Division of Medicine, University College London, London, United Kingdom
- * E-mail: (DBS); (KJE); (AJR)
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1468
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Rajala JE, Vehniäinen ER, Väisänen A, Kukkonen JVK. Toxicity of silver nanoparticles to Lumbriculus variegatus is a function of dissolved silver and promoted by low sediment pH. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2018; 37:1889-1897. [PMID: 29575024 DOI: 10.1002/etc.4136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 12/04/2017] [Accepted: 03/15/2018] [Indexed: 06/08/2023]
Abstract
Toxicity of silver nanoparticles (AgNPs) to benthic organisms is a major concern. The use of AgNPs in industry and consumer products leads to increasing release of AgNPs into the aquatic environment-sediments being the major sink. Effects of sediment pH on the toxicity of AgNPs to benthic oligochaeta Lumbriculus variegatus were studied in a 23-d toxicity test. Artificially prepared sediments (pH 5 and 7) were spiked with varying concentrations of uncoated AgNP, polyvinylpyrrolidone (PVP)-coated AgNP, and silver nitrate (AgNO3 ) as dissolved Ag reference. Number of individuals and biomass change were used as endpoints for the toxicity. The toxic effects were related to the bioaccessible concentration of dissolved Ag in the sediments, assessed with a 2-step extraction procedure. The toxicity of 2 AgNPs was similar and greatly enhanced in the acidic sediment. Because the toxic effects were well related to the bioaccessible concentration of dissolved Ag in the sediments, the toxicity of sediment-associated AgNPs to L. variegatus is suggested to be a function of dissolved Ag rather than a result from NP-specific modes of toxicity. Environ Toxicol Chem 2018;37:1889-1897. © 2018 SETAC.
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Affiliation(s)
- Juho E Rajala
- Department of Biological and Environmental Science, University of Jyväskylä, Jyväskylä, Finland
| | - Eeva-Riikka Vehniäinen
- Department of Biological and Environmental Science, University of Jyväskylä, Jyväskylä, Finland
| | - Ari Väisänen
- Department of Chemistry, University of Jyväskylä, Jyväskylä, Finland
| | - Jussi V K Kukkonen
- Department of Biological and Environmental Science, University of Jyväskylä, Jyväskylä, Finland
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1469
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Vercellino RB, Pandolfo CE, Breccia G, Cantamutto M, Presotto A. AHAS Trp574Leu substitution in Raphanus sativus L.: screening, enzyme activity and fitness cost. PEST MANAGEMENT SCIENCE 2018; 74:1600-1607. [PMID: 29314549 DOI: 10.1002/ps.4849] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 10/10/2017] [Accepted: 12/22/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Feral radish (Raphanus sativus L.) is a problematic weed that has become resistant to acetohydroxyacid synthase (AHAS) inhibitor herbicides due to the Trp574Leu mutation. An AHAS gene mutation that causes herbicide resistance may have negative pleiotropic effects on plant fitness. This study reports the effects of the Trp574Leu mutation on AHAS activity and reproductive traits of R. sativus. RESULTS Eight of 17 feral radish accessions presented individuals resistant to metsulfuron-methyl at 0.5% to >90.0% and all the resistant individuals analyzed showed the Trp574Leu mutation. Without herbicide selection, the AHAS activity was 3.2-fold higher in the susceptible accession than in the resistant one. The resistant accession was >9000-fold more resistant to metsulfuron-methyl and imazethapyr than the susceptible accession. Under low intraspecific competition during two growing seasons, AHAS-resistant feral radish accessions showed 22-38% and 21-47% lower seed numbers and yield per plant than the susceptible accession. CONCLUSION This is the first report of fitness cost associated with the AHAS Trp574Leu mutation in R. sativus populations. This fitness cost could reduce frequency of the resistant allele without herbicide selection. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Roman B Vercellino
- CERZOS, Departamento de Agronomía, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
| | - Claudio E Pandolfo
- CERZOS, Departamento de Agronomía, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
| | - Gabriela Breccia
- Instituto de Investigaciones en Ciencias Agrarias de Rosario, Universidad Nacional de Rosario, Consejo Nacional de Investigaciones Científicas y Técnicas (IICAR, UNR, CONICET), Zavalla, Argentina
| | - Miguel Cantamutto
- Instituto Nacional de Tecnología Agropecuaria, Hilario Ascasubi, Argentina
| | - Alejandro Presotto
- CERZOS, Departamento de Agronomía, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
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1470
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Mizuno T, Hayashi M, Akino T. Combined use of two defensive traits in pupae of Scymnus posticalis
ladybirds. Ethology 2018. [DOI: 10.1111/eth.12748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takafumi Mizuno
- Applied Entomology Laboratory, Bioresource Field Science; Kyoto Institute of Technology; Ukyo-ku, Kyoto Japan
- Key Laboratory of Tropical Forest Ecology; Xishuangbanna Tropical Botanical Garden; Chinese Academy of Sciences; Menglun, Yunnan China
| | - Masayuki Hayashi
- Faculty of Horticulture; Laboratory of Applied Entomology; Chiba University; Matsudo Japan
- Faculty of Agriculture; Laboratory of Entomology; Ryukyu University; Nishihara Japan
| | - Toshiharu Akino
- Applied Entomology Laboratory, Bioresource Field Science; Kyoto Institute of Technology; Ukyo-ku, Kyoto Japan
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1471
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Zittier ZMC, Bock C, Sukhotin AA, Häfker NS, Pörtner HO. Impact of ocean acidification on thermal tolerance and acid–base regulation of Mytilus edulis from the White Sea. Polar Biol 2018. [DOI: 10.1007/s00300-018-2362-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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1472
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Pulikkan JA, Hegde M, Ahmad HM, Belaghzal H, Illendula A, Yu J, O'Hagan K, Ou J, Muller-Tidow C, Wolfe SA, Zhu LJ, Dekker J, Bushweller JH, Castilla LH. CBFβ-SMMHC Inhibition Triggers Apoptosis by Disrupting MYC Chromatin Dynamics in Acute Myeloid Leukemia. Cell 2018; 174:172-186.e21. [PMID: 29958106 PMCID: PMC6211564 DOI: 10.1016/j.cell.2018.05.048] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2017] [Revised: 02/12/2018] [Accepted: 05/23/2018] [Indexed: 12/25/2022]
Abstract
The fusion oncoprotein CBFβ-SMMHC, expressed in leukemia cases with chromosome 16 inversion, drives leukemia development and maintenance by altering the activity of the transcription factor RUNX1. Here, we demonstrate that CBFβ-SMMHC maintains cell viability by neutralizing RUNX1-mediated repression of MYC expression. Upon pharmacologic inhibition of the CBFβ-SMMHC/RUNX1 interaction, RUNX1 shows increased binding at three MYC distal enhancers, where it represses MYC expression by mediating the replacement of the SWI/SNF complex component BRG1 with the polycomb-repressive complex component RING1B, leading to apoptosis. Combining the CBFβ-SMMHC inhibitor with the BET inhibitor JQ1 eliminates inv(16) leukemia in human cells and a mouse model. Enhancer-interaction analysis indicated that the three enhancers are physically connected with the MYC promoter, and genome-editing analysis demonstrated that they are functionally implicated in deregulation of MYC expression. This study reveals a mechanism whereby CBFβ-SMMHC drives leukemia maintenance and suggests that inhibitors targeting chromatin activity may prove effective in inv(16) leukemia therapy.
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MESH Headings
- Animals
- Apoptosis/drug effects
- Azepines/pharmacology
- Azepines/therapeutic use
- Benzimidazoles/pharmacology
- Benzimidazoles/therapeutic use
- Cell Line, Tumor
- Chromatin/metabolism
- Chromosomal Proteins, Non-Histone/chemistry
- Chromosomal Proteins, Non-Histone/metabolism
- Chromosome Inversion/drug effects
- Core Binding Factor Alpha 2 Subunit/chemistry
- Core Binding Factor Alpha 2 Subunit/metabolism
- DNA/chemistry
- DNA/metabolism
- DNA Helicases/metabolism
- Disease Models, Animal
- Humans
- Kaplan-Meier Estimate
- Leukemia, Myeloid, Acute/drug therapy
- Leukemia, Myeloid, Acute/mortality
- Leukemia, Myeloid, Acute/pathology
- Mice
- Mice, Inbred C57BL
- Nuclear Proteins/metabolism
- Oncogene Proteins, Fusion/antagonists & inhibitors
- Oncogene Proteins, Fusion/metabolism
- Polycomb Repressive Complex 1/metabolism
- Promoter Regions, Genetic
- Protein Binding
- Proto-Oncogene Proteins c-myc/genetics
- Proto-Oncogene Proteins c-myc/metabolism
- Transcription Factors/chemistry
- Transcription Factors/metabolism
- Triazoles/pharmacology
- Triazoles/therapeutic use
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Affiliation(s)
- John Anto Pulikkan
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Mahesh Hegde
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Hafiz Mohd Ahmad
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Houda Belaghzal
- Howard Hughes Medical Institute, Program in Systems Biology, Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Anuradha Illendula
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA, USA
| | - Jun Yu
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Kelsey O'Hagan
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Jianhong Ou
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Carsten Muller-Tidow
- Department of Medicine, Hematology, Oncology, and Rheumatology, University Hospital Heidelberg, Heidelberg, Germany
| | - Scot A Wolfe
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Lihua Julie Zhu
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Job Dekker
- Howard Hughes Medical Institute, Program in Systems Biology, Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA, USA
| | - John Hackett Bushweller
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA, USA
| | - Lucio Hernán Castilla
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, USA.
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1473
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Canale A, Durante D, Dunson DB. Convex mixture regression for quantitative risk assessment. Biometrics 2018; 74:1331-1340. [PMID: 29894557 DOI: 10.1111/biom.12917] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 04/01/2018] [Accepted: 05/01/2018] [Indexed: 11/30/2022]
Abstract
There is wide interest in studying how the distribution of a continuous response changes with a predictor. We are motivated by environmental applications in which the predictor is the dose of an exposure and the response is a health outcome. A main focus in these studies is inference on dose levels associated with a given increase in risk relative to a baseline. In addressing this goal, popular methods either dichotomize the continuous response or focus on modeling changes with the dose in the expectation of the outcome. Such choices may lead to information loss and provide inaccurate inference on dose-response relationships. We instead propose a Bayesian convex mixture regression model that allows the entire distribution of the health outcome to be unknown and changing with the dose. To balance flexibility and parsimony, we rely on a mixture model for the density at the extreme doses, and express the conditional density at each intermediate dose via a convex combination of these extremal densities. This representation generalizes classical dose-response models for quantitative outcomes, and provides a more parsimonious, but still powerful, formulation compared to nonparametric methods, thereby improving interpretability and efficiency in inference on risk functions. A Markov chain Monte Carlo algorithm for posterior inference is developed, and the benefits of our methods are outlined in simulations, along with a study on the impact of dde exposure on gestational age.
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Affiliation(s)
- Antonio Canale
- Department of Statistical Sciences, University of Padua, Padua, Italy
| | - Daniele Durante
- Department of Decision Sciences, Bocconi University and Bocconi Institute for Data Science and Analytics, Milan, Italy
| | - David B Dunson
- Department of Statistical Science, Duke University, Durham, North Carolina, U.S.A
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1474
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Coulthard SA, McGarrity S, Sahota K, Berry P, Redfern CPF. Three Faces of Mercaptopurine Cytotoxicity In Vitro: Methylation, Nucleotide Homeostasis, and Deoxythioguanosine in DNA. Drug Metab Dispos 2018; 46:1191-1199. [PMID: 29884651 DOI: 10.1124/dmd.118.081844] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 06/01/2018] [Indexed: 11/22/2022] Open
Abstract
Mercaptopurine (MP) is a cytotoxic thiopurine important for the treatment of cancer and autoimmune diseases. MP and other thiopurine drugs undergo extensive intracellular metabolism, but the mechanisms of action are poorly characterized. In particular, it is unknown how different metabolites contribute to cytotoxicity and incorporation of thiopurine bases into DNA. The aim of this study was to ask whether cytotoxicity results from the incorporation of thioguanosine nucleotides into DNA, an alternative thiopurine metabolite, or a combination of factors. Therefore, we measured the cytotoxicity, metabolism, and incorporation of thioguanosine into DNA in response to MP or MP metabolites. Thiopurine metabolites varied in cytotoxicity, with methyl-thioinosine-mono-phosphate and thioguanosine-tri-phosphate the most toxic, and the methyl-thioguanosine nucleotides the least. We show, using liquid chromatography-tandem mass spectrometry, how different metabolites may perturb biochemical pathways, particularly disrupting guanosine nucleotide homeostasis, that may contribute to the mechanism of action of thiopurines. Although there was no correlation between metabolite cytotoxicity and the levels of 6-methylthioinosine-mono-phosphate or thioguanosine incorporation into DNA as individual factors, a combined analysis suggested that these factors together had a major influence on cytotoxicity. This study emphasizes the importance of enzymes of nucleotide homeostasis, methylation, and demethylation in thiopurine effects. These results will facilitate the development of dynamic biochemical models of thiopurine biochemistry that will improve our understanding of mechanisms of action in relevant target tissues.
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Affiliation(s)
- Sally A Coulthard
- Northern Institute of Cancer Research (S.A.C., S.M., P.B., C.P.F.R.) and Institute of Cellular Medicine (S.A.C., K.S.), Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Sarah McGarrity
- Northern Institute of Cancer Research (S.A.C., S.M., P.B., C.P.F.R.) and Institute of Cellular Medicine (S.A.C., K.S.), Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Kalvin Sahota
- Northern Institute of Cancer Research (S.A.C., S.M., P.B., C.P.F.R.) and Institute of Cellular Medicine (S.A.C., K.S.), Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Philip Berry
- Northern Institute of Cancer Research (S.A.C., S.M., P.B., C.P.F.R.) and Institute of Cellular Medicine (S.A.C., K.S.), Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Chris P F Redfern
- Northern Institute of Cancer Research (S.A.C., S.M., P.B., C.P.F.R.) and Institute of Cellular Medicine (S.A.C., K.S.), Newcastle University, Newcastle upon Tyne, United Kingdom
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1475
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Denluck L, Wu F, Crandon LE, Harper BJ, Harper SL. Reactive oxygen species generation is likely a driver of copper based nanomaterial toxicity. ENVIRONMENTAL SCIENCE. NANO 2018; 5:1473-1481. [PMID: 30455956 PMCID: PMC6239169 DOI: 10.1039/c8en00055g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Determining the specific nanomaterial features that elicit adverse biological responses is important to inform risk assessments, develop targeted applications, and rationally design future nanomaterials. Embryonic zebrafish are often employed to study nanomaterial-biological interactions, but few studies address the role of the chorion in nanomaterial exposure and toxicity. Here, we used chorion-intact (CI) or dechorionated (DC) embryonic zebrafish to investigate the influence of the chorion on copper-based nanoparticle toxicity. We found that despite higher dissolution and uptake, CuO NPs were less toxic than Cu NPs regardless of chorion status and did not cause 100 % mortality at even the highest exposure concentration. The presence of the chorion inhibited Cu toxicity: DC exposures to Cu NPs had an LC50 of 2.5 ± 0.3 mg/L compared to a CI LC50 of 13.7 ± 0.8 mg/L. This highlights the importance of considering zebrafish chorion status during nanotoxicological investigations, as embryo sensitivity increased by one order of magnitude or more when chorions were removed. Agglomerate size, zeta potential, and dissolved Cu did not sufficiently explain the differences in toxicity between Cu NPs and CuO NPs; however, reactive oxygen species (ROS) generation did. Cu NPs generated ROS in a concentration-dependent manner, while CuO did not and generated less than Cu NPs. We believe that the differences between the toxicities of Cu NPs and CuO NPs are due in part to their ability to generate ROS which could and should be a hazard consideration for risk assessments.
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Affiliation(s)
- Lindsay Denluck
- Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis OR, USA
| | - Fan Wu
- School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis OR, USA
| | - Lauren E. Crandon
- School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis OR, USA
| | - Bryan J. Harper
- Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis OR, USA
| | - Stacey L. Harper
- Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis OR, USA
- School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis OR, USA
- Oregon Nanoscience and Michrotechnologies Institute, Eugene OR, USA
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1476
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Arzt L, Bokanovic D, Schrautzer C, Laipold K, Möbs C, Pfützner W, Herzog SA, Vollmann J, Reider N, Bohle B, Aberer W, Sturm GJ. Immunological differences between insect venom-allergic patients with and without immunotherapy and asymptomatically sensitized subjects. Allergy 2018; 73:1223-1231. [PMID: 29171032 DOI: 10.1111/all.13368] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/17/2017] [Indexed: 11/30/2022]
Abstract
BACKGROUND Currently available tests are unable to distinguish between asymptomatic sensitization and clinically relevant Hymenoptera venom allergy. A reliable serological marker to monitor venom immunotherapy (VIT) does also not exist. Our aim was to find reliable serological markers to predict tolerance to bee and vespid stings. METHODS We included 77 asymptomatically sensitized subjects, 85 allergic patients with acute systemic sting reactions, and 61 allergic patients currently treated with VIT. Levels of sIgE and sIgG4 to bee and vespid venom, rApi m 1, and rVes v 5 were measured immediately after allergic sting reactions or before sting challenges and 4 weeks later. All sting challenges were tolerated. The inhibitory activity was determined using BAT inhibition and ELIFAB assay. RESULTS Median sIgG4 levels were 96-fold higher in VIT patients (P < .001) while sIgE/sIgG4 ratios were consistently lower (P < .001). The ELIFAB assay was paralleled by low sIgE/sIgG4 ratios in VIT patients, showing markedly higher allergen-blocking capacity (P < .001). An almost complete inhibition of the basophil response was seen in all patients treated with vespid venom, but not in those treated with bee venom. Four weeks after the sting, sIgE and sIgG4 levels were increased in allergic and asymptomatically sensitized patients, but not in VIT patients. CONCLUSION Immunological responses after stings varied in bee and vespid venom-allergic patients. In patients under VIT, sIgE and sIgG4 remained completely stable after sting challenges. Monitoring VIT efficacy was only possible in vespid venom allergy, and the sIgG4 threshold for rVes v 5 had the highest sensitivity to confirm tolerance. The BAT inhibition test was the most reliable tool to confirm tolerance on an individual basis.
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Affiliation(s)
- L. Arzt
- Department of Dermatology and Venerology Medical University of Graz Graz Austria
| | - D. Bokanovic
- Department of Dermatology and Venerology Medical University of Graz Graz Austria
| | - C. Schrautzer
- Department of Dermatology and Venerology Medical University of Graz Graz Austria
| | - K. Laipold
- Department of Dermatology and Venerology Medical University of Graz Graz Austria
| | - C. Möbs
- Clinical & Experimental Allergology, Department of Dermatology and Allergology Philipps‐University of Marburg Marburg Germany
| | - W. Pfützner
- Clinical & Experimental Allergology, Department of Dermatology and Allergology Philipps‐University of Marburg Marburg Germany
| | - S. A. Herzog
- Institute for Medical Informatics, Statistics and Documentation Medical University of Graz Graz Austria
| | - J. Vollmann
- Institute of Zoology University of Graz Graz Austria
| | - N. Reider
- Department of Dermatology, Venerology and Allergology Medical University of Innsbruck Innsbruck Austria
| | - B. Bohle
- Division of Cellular Allergology Institute of Pathophysiology and Allergy Research Medical University of Vienna Vienna Austria
| | - W. Aberer
- Department of Dermatology and Venerology Medical University of Graz Graz Austria
| | - G. J. Sturm
- Department of Dermatology and Venerology Medical University of Graz Graz Austria
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1477
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Estébanez B, Medina NG, Caparrós R, Monforte L, Del-Castillo-Alonso MÁ, Martínez-Abaigar J, Núñez-Olivera E. Spores potentially dispersed to longer distances are more tolerant to ultraviolet radiation: A case study in the moss genus Orthotrichum. AMERICAN JOURNAL OF BOTANY 2018; 105:996-1008. [PMID: 29985543 DOI: 10.1002/ajb2.1118] [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: 12/13/2017] [Accepted: 04/18/2018] [Indexed: 06/08/2023]
Abstract
PREMISE OF THE STUDY Ultraviolet (UV) radiation influences the viability of algal spores and seed-plant pollen depending on the species, the dose, and the wavelength. In bryophytes, one of the dominant groups of plants in many habitats, UV radiation could determine their spore dispersal strategy, and such data are critical for reconstructing the ancestral state in plants and for determining the distribution range and persistence of bryophyte species. METHODS Spores of four bryophyte species of the moss genus Orthotrichum that were either hygrochastic or xerochastic (spores dispersed under wet or dry conditions, respectively) were exposed to realistic doses of UV radiation under laboratory conditions. Spore viability was evaluated through germination experiments and, for the first time in bryophytes, ultrastructural observations. Given that the UV-B doses used were relatively higher than the UV-A doses, the UV effect was probably due more to UV-B than UV-A wavelengths. KEY RESULTS All four species reduced their spore germination capacity in a UV dose-dependent manner, concomitantly increasing spore ultrastructural damage (cytoplasmic and plastid alterations). Most spores eventually died when exposed to the highest UV dose. Interestingly, spores of hygrochastic species were much more UV-sensitive than those of xerochastic species. CONCLUSIONS UV tolerance determines moss spore viability, as indicated by germination capacity and ultrastructural damage, and differs between spores of species with different dispersal strategies. Specifically, the higher UV tolerance of xerochastic spores may enable them to be dispersed to longer distances than hygrochastic spores, thus extending more efficiently the distribution range of the corresponding species.
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Affiliation(s)
- Belén Estébanez
- Departamento de Biología (Botánica), Facultad de Ciencias, Universidad Autónoma de Madrid, Campus de Cantoblanco, Darwin 2, 28049, Madrid, Spain
| | - Nagore G Medina
- Departamento de Biología (Botánica), Facultad de Ciencias, Universidad Autónoma de Madrid, Campus de Cantoblanco, Darwin 2, 28049, Madrid, Spain
| | - Rut Caparrós
- Departamento de Biología (Botánica), Facultad de Ciencias, Universidad Autónoma de Madrid, Campus de Cantoblanco, Darwin 2, 28049, Madrid, Spain
| | - Laura Monforte
- Facultad de Ciencia y Tecnología, Universidad de La Rioja, Madre de Dios 53, 26006, Logroño (La Rioja), Spain
| | | | - Javier Martínez-Abaigar
- Facultad de Ciencia y Tecnología, Universidad de La Rioja, Madre de Dios 53, 26006, Logroño (La Rioja), Spain
| | - Encarnación Núñez-Olivera
- Facultad de Ciencia y Tecnología, Universidad de La Rioja, Madre de Dios 53, 26006, Logroño (La Rioja), Spain
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1478
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Tiriac H, Belleau P, Engle DD, Plenker D, Deschênes A, Somerville TDD, Froeling FEM, Burkhart RA, Denroche RE, Jang GH, Miyabayashi K, Young CM, Patel H, Ma M, LaComb JF, Palmaira RLD, Javed AA, Huynh JC, Johnson M, Arora K, Robine N, Shah M, Sanghvi R, Goetz AB, Lowder CY, Martello L, Driehuis E, LeComte N, Askan G, Iacobuzio-Donahue CA, Clevers H, Wood LD, Hruban RH, Thompson E, Aguirre AJ, Wolpin BM, Sasson A, Kim J, Wu M, Bucobo JC, Allen P, Sejpal DV, Nealon W, Sullivan JD, Winter JM, Gimotty PA, Grem JL, DiMaio DJ, Buscaglia JM, Grandgenett PM, Brody JR, Hollingsworth MA, O'Kane GM, Notta F, Kim E, Crawford JM, Devoe C, Ocean A, Wolfgang CL, Yu KH, Li E, Vakoc CR, Hubert B, Fischer SE, Wilson JM, Moffitt R, Knox J, Krasnitz A, Gallinger S, Tuveson DA. Organoid Profiling Identifies Common Responders to Chemotherapy in Pancreatic Cancer. Cancer Discov 2018; 8:1112-1129. [PMID: 29853643 DOI: 10.1158/2159-8290.cd-18-0349] [Citation(s) in RCA: 617] [Impact Index Per Article: 102.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 05/03/2018] [Accepted: 05/25/2018] [Indexed: 12/13/2022]
Abstract
Pancreatic cancer is the most lethal common solid malignancy. Systemic therapies are often ineffective, and predictive biomarkers to guide treatment are urgently needed. We generated a pancreatic cancer patient-derived organoid (PDO) library that recapitulates the mutational spectrum and transcriptional subtypes of primary pancreatic cancer. New driver oncogenes were nominated and transcriptomic analyses revealed unique clusters. PDOs exhibited heterogeneous responses to standard-of-care chemotherapeutics and investigational agents. In a case study manner, we found that PDO therapeutic profiles paralleled patient outcomes and that PDOs enabled longitudinal assessment of chemosensitivity and evaluation of synchronous metastases. We derived organoid-based gene expression signatures of chemosensitivity that predicted improved responses for many patients to chemotherapy in both the adjuvant and advanced disease settings. Finally, we nominated alternative treatment strategies for chemorefractory PDOs using targeted agent therapeutic profiling. We propose that combined molecular and therapeutic profiling of PDOs may predict clinical response and enable prospective therapeutic selection.Significance: New approaches to prioritize treatment strategies are urgently needed to improve survival and quality of life for patients with pancreatic cancer. Combined genomic, transcriptomic, and therapeutic profiling of PDOs can identify molecular and functional subtypes of pancreatic cancer, predict therapeutic responses, and facilitate precision medicine for patients with pancreatic cancer. Cancer Discov; 8(9); 1112-29. ©2018 AACR.See related commentary by Collisson, p. 1062This article is highlighted in the In This Issue feature, p. 1047.
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Affiliation(s)
- Hervé Tiriac
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York
| | - Pascal Belleau
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York
| | | | - Dennis Plenker
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York
| | | | | | | | - Richard A Burkhart
- Johns Hopkins University, Division of Hepatobiliary and Pancreatic Surgery, Baltimore, Maryland
| | - Robert E Denroche
- PanCuRx Translational Research Initiative, Ontario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Gun-Ho Jang
- PanCuRx Translational Research Initiative, Ontario Institute for Cancer Research, Toronto, Ontario, Canada
| | | | - C Megan Young
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York.,Swiss Federal Institute of Technology Lausanne (EPFL), School of Life Sciences, Swiss Institute for Experimental Cancer Research (ISREC), Laboratory of Tumor Heterogeneity and Stemness in Cancer, Lausanne, Switzerland
| | - Hardik Patel
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York
| | - Michelle Ma
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York
| | - Joseph F LaComb
- Department of Medicine, Stony Brook University, Stony Brook, New York
| | | | - Ammar A Javed
- Johns Hopkins University, Division of Hepatobiliary and Pancreatic Surgery, Baltimore, Maryland
| | - Jasmine C Huynh
- University of California, Davis, Comprehensive Cancer Center, Division of Hematology and Oncology, Sacramento, California
| | | | | | | | | | | | - Austin B Goetz
- Department of Surgery, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Cinthya Y Lowder
- Department of Surgery, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Laura Martello
- SUNY Downstate Medical Center, Department of Medicine, New York, New York
| | - Else Driehuis
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW), Utrecht, the Netherlands.,University Medical Center (UMC), Utrecht, the Netherlands
| | | | - Gokce Askan
- Memorial Sloan Kettering Cancer Center, New York, New York
| | | | - Hans Clevers
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW), Utrecht, the Netherlands.,University Medical Center (UMC), Utrecht, the Netherlands.,Princess Maxime Center (PMC), Utrecht, the Netherlands
| | - Laura D Wood
- Department of Pathology, Johns Hopkins University, Baltimore, Maryland
| | - Ralph H Hruban
- Department of Pathology, Johns Hopkins University, Baltimore, Maryland
| | | | - Andrew J Aguirre
- Dana-Farber Cancer Institute, Broad Institute, Boston, Massachusetts
| | - Brian M Wolpin
- Dana-Farber Cancer Institute, Broad Institute, Boston, Massachusetts
| | - Aaron Sasson
- Department of Surgery, Stony Brook University, Stony Brook, New York
| | - Joseph Kim
- Department of Surgery, Stony Brook University, Stony Brook, New York
| | - Maoxin Wu
- Department of Pathology, Stony Brook University, Stony Brook, New York
| | | | - Peter Allen
- Memorial Sloan Kettering Cancer Center, New York, New York
| | - Divyesh V Sejpal
- Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Division of Gastroenterology, Hempstead, New York
| | - William Nealon
- Department of Surgery, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, New York
| | - James D Sullivan
- Department of Surgery, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, New York
| | - Jordan M Winter
- Department of Surgery, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Phyllis A Gimotty
- Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Jean L Grem
- Department of Medicine, University of Nebraska Medical Center, Omaha, Nebraska
| | - Dominick J DiMaio
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska
| | | | - Paul M Grandgenett
- University of Nebraska Medical Center, Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffet Cancer Center, Omaha, Nebraska
| | - Jonathan R Brody
- Department of Surgery, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Michael A Hollingsworth
- University of Nebraska Medical Center, Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffet Cancer Center, Omaha, Nebraska
| | - Grainne M O'Kane
- Wallace McCain Centre for Pancreatic Cancer, Department of Medical Oncology, Princess Margaret Cancer Centre, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Faiyaz Notta
- PanCuRx Translational Research Initiative, Ontario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Edward Kim
- University of California, Davis, Comprehensive Cancer Center, Division of Hematology and Oncology, Sacramento, California
| | - James M Crawford
- Department of Pathology and Laboratory Medicine, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, New York
| | - Craig Devoe
- Division of Medical Oncology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, New York
| | | | - Christopher L Wolfgang
- Johns Hopkins University, Division of Hepatobiliary and Pancreatic Surgery, Baltimore, Maryland
| | - Kenneth H Yu
- Memorial Sloan Kettering Cancer Center, New York, New York
| | - Ellen Li
- Department of Medicine, Stony Brook University, Stony Brook, New York
| | | | | | - Sandra E Fischer
- Department of Pathology, University Health Network, University of Toronto, Toronto, Ontario, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Julie M Wilson
- PanCuRx Translational Research Initiative, Ontario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Richard Moffitt
- Department of Surgery, Stony Brook University, Stony Brook, New York.,Department of Biomedical Informatics, Stony Brook University, Stony Brook, New York
| | - Jennifer Knox
- Wallace McCain Centre for Pancreatic Cancer, Department of Medical Oncology, Princess Margaret Cancer Centre, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | | | - Steven Gallinger
- PanCuRx Translational Research Initiative, Ontario Institute for Cancer Research, Toronto, Ontario, Canada. .,Wallace McCain Centre for Pancreatic Cancer, Department of Medical Oncology, Princess Margaret Cancer Centre, University Health Network, University of Toronto, Toronto, Ontario, Canada.,Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada.,Hepatobiliary/Pancreatic Surgical Oncology Program, University Health Network, Toronto, Ontario, Canada
| | - David A Tuveson
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York.
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1479
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Perry KD, Baker GJ, Powis KJ, Kent JK, Ward CM, Baxter SW. Cryptic Plutella species show deep divergence despite the capacity to hybridize. BMC Evol Biol 2018; 18:77. [PMID: 29843598 PMCID: PMC5975261 DOI: 10.1186/s12862-018-1183-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 04/17/2018] [Indexed: 12/30/2022] Open
Abstract
Background Understanding genomic and phenotypic diversity among cryptic pest taxa has important implications for the management of pests and diseases. The diamondback moth, Plutella xylostella L., has been intensively studied due to its ability to evolve insecticide resistance and status as the world’s most destructive pest of brassicaceous crops. The surprise discovery of a cryptic species endemic to Australia, Plutella australiana Landry & Hebert, raised questions regarding the distribution, ecological traits and pest status of the two species, the capacity for gene flow and whether specific management was required. Here, we collected Plutella from wild and cultivated brassicaceous plants from 75 locations throughout Australia and screened 1447 individuals to identify mtDNA lineages and Wolbachia infections. We genotyped genome-wide SNP markers using RADseq in coexisting populations of each species. In addition, we assessed reproductive compatibility in crossing experiments and insecticide susceptibility phenotypes using bioassays. Results The two Plutella species coexisted on wild brassicas and canola crops, but only 10% of Plutella individuals were P. australiana. This species was not found on commercial Brassica vegetable crops, which are routinely sprayed with insecticides. Bioassays found that P. australiana was 19-306 fold more susceptible to four commonly-used insecticides than P. xylostella. Laboratory crosses revealed that reproductive isolation was incomplete but directionally asymmetric between the species. However, genome-wide nuclear SNPs revealed striking differences in genetic diversity and strong population structure between coexisting wild populations of each species. Nuclear diversity was 1.5-fold higher in P. australiana, yet both species showed limited variation in mtDNA. Infection with a single Wolbachia subgroup B strain was fixed in P. australiana, suggesting that a selective sweep contributed to low mtDNA diversity, while a subgroup A strain infected just 1.5% of P. xylostella. Conclusions Despite sympatric distributions and the capacity to hybridize, strong genomic and phenotypic divergence exists between these Plutella species that is consistent with contrasting colonization histories and reproductive isolation after secondary contact. Although P. australiana is a potential pest of brassicaceous crops, it is of secondary importance to P. xylostella. Electronic supplementary material The online version of this article (10.1186/s12862-018-1183-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Kym D Perry
- School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, 5005, Australia. .,South Australian Research and Development Institute, Adelaide, 5001, Australia.
| | - Gregory J Baker
- South Australian Research and Development Institute, Adelaide, 5001, Australia
| | - Kevin J Powis
- South Australian Research and Development Institute, Adelaide, 5001, Australia
| | - Joanne K Kent
- South Australian Research and Development Institute, Adelaide, 5001, Australia
| | - Christopher M Ward
- School of Biological Sciences, The University of Adelaide, Adelaide, 5005, Australia
| | - Simon W Baxter
- School of Biological Sciences, The University of Adelaide, Adelaide, 5005, Australia
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1480
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Gigante CM, Dettinger L, Powell JW, Seiders M, Condori REC, Griesser R, Okogi K, Carlos M, Pesko K, Breckenridge M, Simon EMM, Chu MYJV, Davis AD, Brunt SJ, Orciari L, Yager P, Carson WC, Hartloge C, Saliki JT, Sanchez S, Deldari M, Hsieh K, Wadhwa A, Wilkins K, Peredo VY, Rabideau P, Gruhn N, Cadet R, Isloor S, Nath SS, Joseph T, Gao J, Wallace R, Reynolds M, Olson VA, Li Y. Multi-site evaluation of the LN34 pan-lyssavirus real-time RT-PCR assay for post-mortem rabies diagnostics. PLoS One 2018; 13:e0197074. [PMID: 29768505 PMCID: PMC5955534 DOI: 10.1371/journal.pone.0197074] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 04/25/2018] [Indexed: 12/15/2022] Open
Abstract
Rabies is a fatal zoonotic disease that requires fast, accurate diagnosis to prevent disease in an exposed individual. The current gold standard for post-mortem diagnosis of human and animal rabies is the direct fluorescent antibody (DFA) test. While the DFA test has proven sensitive and reliable, it requires high quality antibody conjugates, a skilled technician, a fluorescence microscope and diagnostic specimen of sufficient quality. The LN34 pan-lyssavirus real-time RT-PCR assay represents a strong candidate for rabies post-mortem diagnostics due to its ability to detect RNA across the diverse Lyssavirus genus, its high sensitivity, its potential for use with deteriorated tissues, and its simple, easy to implement design. Here, we present data from a multi-site evaluation of the LN34 assay in 14 laboratories. A total of 2,978 samples (1,049 DFA positive) from Africa, the Americas, Asia, Europe, and the Middle East were tested. The LN34 assay exhibited low variability in repeatability and reproducibility studies and was capable of detecting viral RNA in fresh, frozen, archived, deteriorated and formalin-fixed brain tissue. The LN34 assay displayed high diagnostic specificity (99.68%) and sensitivity (99.90%) when compared to the DFA test, and no DFA positive samples were negative by the LN34 assay. The LN34 assay produced definitive findings for 80 samples that were inconclusive or untestable by DFA; 29 were positive. Five samples were inconclusive by the LN34 assay, and only one sample was inconclusive by both tests. Furthermore, use of the LN34 assay led to the identification of one false negative and 11 false positive DFA results. Together, these results demonstrate the reliability and robustness of the LN34 assay and support a role for the LN34 assay in improving rabies diagnostics and surveillance.
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Affiliation(s)
- Crystal M. Gigante
- Poxvirus and Rabies Branch, Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Lisa Dettinger
- Bureau of Laboratories, Pennsylvania Department of Health, Exton, Pennsylvania, United States of America
| | - James W. Powell
- Rabies Unit, Wisconsin State Laboratory of Hygiene, Madison, Wisconsin, United States of America
| | - Melanie Seiders
- Bureau of Laboratories, Pennsylvania Department of Health, Exton, Pennsylvania, United States of America
| | - Rene Edgar Condori Condori
- Poxvirus and Rabies Branch, Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Richard Griesser
- Rabies Unit, Wisconsin State Laboratory of Hygiene, Madison, Wisconsin, United States of America
| | - Kenneth Okogi
- Rabies Laboratory, Center for Zoonotic and Vectorborne Diseases, Maryland Department of Health, Baltimore, Maryland, United States of America
| | - Maria Carlos
- Rabies Laboratory, Center for Zoonotic and Vectorborne Diseases, Maryland Department of Health, Baltimore, Maryland, United States of America
| | - Kendra Pesko
- Scientific Laboratory Division, New Mexico Department of Health, Santa Fe, New Mexico, United States of America
| | - Mike Breckenridge
- Scientific Laboratory Division, New Mexico Department of Health, Santa Fe, New Mexico, United States of America
| | - Edson Michael M. Simon
- Special Pathogens Laboratory, Department of Health, Research Institute for Tropical Medicine, Alabang Muntinlupa City, Manila, Philippines
| | - Maria Yna Joyce V. Chu
- Special Pathogens Laboratory, Department of Health, Research Institute for Tropical Medicine, Alabang Muntinlupa City, Manila, Philippines
| | - April D. Davis
- Rabies Laboratory, Wadsworth Center, New York State Department of Health, Albany, New York, United States of America
| | - Scott J. Brunt
- Rabies Laboratory, Wadsworth Center, New York State Department of Health, Albany, New York, United States of America
| | - Lillian Orciari
- Poxvirus and Rabies Branch, Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Pamela Yager
- Poxvirus and Rabies Branch, Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - William C. Carson
- Poxvirus and Rabies Branch, Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Claire Hartloge
- Poxvirus and Rabies Branch, Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Jeremiah T. Saliki
- Athens Veterinary Diagnostic Laboratory, University of Georgia, Athens, Georgia, United States of America
| | - Susan Sanchez
- Athens Veterinary Diagnostic Laboratory, University of Georgia, Athens, Georgia, United States of America
| | - Mojgan Deldari
- California Department of Public Health, Sacramento, California, United States of America
| | - Kristina Hsieh
- California Department of Public Health, Sacramento, California, United States of America
| | - Ashutosh Wadhwa
- Poxvirus and Rabies Branch, Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Kimberly Wilkins
- Poxvirus and Rabies Branch, Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Veronica Yung Peredo
- Rabies section, Viral Disease, Public Health Institute of Chile, Santiago, Chile
| | - Patricia Rabideau
- Public Health Command Europe, Laboratory Sciences, Biological Analysis Division, Kirchberg Kaserne, Landstuhl, Germany
| | - Nina Gruhn
- Public Health Command Europe, Laboratory Sciences, Biological Analysis Division, Kirchberg Kaserne, Landstuhl, Germany
| | - Rolain Cadet
- Ministère de l’Agriculture, Port-au-Prince, Haiti
| | - Shrikrishna Isloor
- OIE Twinned KVAFSU-CVA-Crucell Rabies Diagnostic Laboratory, Deptartment of Veterinary Microbiology, Veterinary College, KVAFSU, Hebbal, Bangalore, India
| | - Sujith S. Nath
- OIE Twinned KVAFSU-CVA-Crucell Rabies Diagnostic Laboratory, Deptartment of Veterinary Microbiology, Veterinary College, KVAFSU, Hebbal, Bangalore, India
| | - Tomy Joseph
- Animal Health Centre, Ministry of Agriculture, Abbotsford, British Columbia, Canada
| | - Jinxin Gao
- Poxvirus and Rabies Branch, Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Ryan Wallace
- Poxvirus and Rabies Branch, Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Mary Reynolds
- Poxvirus and Rabies Branch, Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Victoria A. Olson
- Poxvirus and Rabies Branch, Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Yu Li
- Poxvirus and Rabies Branch, Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
- * E-mail:
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1481
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Tachibana K, Yuzuriha T, Tabata R, Fukuda S, Maegawa T, Takahashi R, Tanimoto K, Tsujino H, Nunomura K, Lin B, Matsuura Y, Tanaka T, Hamakubo T, Sakai J, Kodama T, Kobayashi T, Ishimoto K, Miyachi H, Doi T. Discovery of peroxisome proliferator-activated receptor α (PPARα) activators with a ligand-screening system using a human PPARα-expressing cell line. J Biol Chem 2018; 293:10333-10343. [PMID: 29764933 DOI: 10.1074/jbc.ra118.002077] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 05/04/2018] [Indexed: 11/06/2022] Open
Abstract
Peroxisome proliferator-activated receptor α (PPARα) is a ligand-activated transcription factor that belongs to the superfamily of nuclear hormone receptors. PPARα is mainly expressed in the liver, where it activates fatty acid oxidation and lipoprotein metabolism and improves plasma lipid profiles. Therefore, PPARα activators are often used to treat patients with dyslipidemia. To discover additional PPARα activators as potential compounds for use in hypolipidemic drugs, here we established human hepatoblastoma cell lines with luciferase reporter expression from the promoters containing peroxisome proliferator-responsive elements (PPREs) and tetracycline-regulated expression of full-length human PPARα to quantify the effects of chemical ligands on PPARα activity. Using the established cell-based PPARα-activator screening system to screen a library of >12,000 chemical compounds, we identified several hit compounds with basic chemical skeletons different from those of known PPARα agonists. One of the hit compounds, a 1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid derivative we termed compound 3, selectively up-regulated PPARα transcriptional activity, leading to PPARα target gene expression both in vitro and in vivo Of note, the half-maximal effective concentrations of the hit compounds were lower than that of the known PPARα ligand fenofibrate. Finally, fenofibrate or compound 3 treatment of high fructose-fed rats having elevated plasma triglyceride levels for 14 days indicated that compound 3 reduces plasma triglyceride levels with similar efficiency as fenofibrate. These observations raise the possibility that 1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid derivatives might be effective drug candidates for selective targeting of PPARα to manage dyslipidemia.
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Affiliation(s)
- Keisuke Tachibana
- From the Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871,
| | - Tomohiro Yuzuriha
- From the Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871.,the Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-cho, Hirakata, Osaka 573-0101
| | - Ryotaro Tabata
- From the Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871
| | - Syohei Fukuda
- From the Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871
| | - Takashi Maegawa
- From the Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871
| | - Rika Takahashi
- From the Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871
| | - Keiichi Tanimoto
- From the Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871
| | - Hirofumi Tsujino
- From the Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871
| | - Kazuto Nunomura
- From the Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871
| | - Bangzhong Lin
- From the Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871
| | - Yoshiharu Matsuura
- the Department of Molecular Virology, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamadaoka, Suita, Osaka 565-0871
| | | | - Takao Hamakubo
- the Department of Quantitative Biology and Medicine, and
| | - Juro Sakai
- the Division of Metabolic Medicine, Research Center for Advanced Science and Technology, Research Center for Advanced Science and Technology, University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo 153-8904, and
| | | | - Tadayuki Kobayashi
- From the Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871
| | - Kenji Ishimoto
- From the Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871
| | - Hiroyuki Miyachi
- the Lead Exploration Unit, Drug Discovery Initiative, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - Takefumi Doi
- From the Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871,
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1482
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Miriyala A, Kessler S, Rind FC, Wright GA. Burst Firing in Bee Gustatory Neurons Prevents Adaptation. Curr Biol 2018; 28:1585-1594.e3. [PMID: 29754900 DOI: 10.1016/j.cub.2018.03.070] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 02/20/2018] [Accepted: 03/29/2018] [Indexed: 10/16/2022]
Abstract
Animals detect changes in the environment using modality-specific, peripheral sensory neurons. The insect gustatory system encodes tastant identity and concentration through the independent firing of gustatory receptor neurons (GRNs) that spike rapidly at stimulus onset and quickly adapt. Here, we show the first evidence that concentrated sugar evokes a temporally structured burst pattern of spiking involving two GRNs within the gustatory sensilla of bumblebees. Bursts of spikes resulted when a sucrose-activated GRN was inhibited by another GRN at a frequency of ∼22 Hz during the first 1 s of stimulation. Pharmacological blockade of gap junctions abolished bursting, indicating that bee GRNs have electrical synapses that produce a temporal pattern of spikes when one GRN is activated by a sugar ligand. Bursting permitted bee GRNs to maintain a high rate of spiking and to exhibit the slowest rate of adaptation of any insect species. Feeding bout duration correlated with coherent bursting; only sugar concentrations that produced bursting evoked the bumblebee's feeding reflex. Volume of solution imbibed was a direct function of time in contact with food. We propose that gap junctions among GRNs enable a sustained rate of GRN spiking that is necessary to drive continuous feeding by the bee proboscis.
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Affiliation(s)
- Ashwin Miriyala
- Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Sébastien Kessler
- Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - F Claire Rind
- Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Geraldine A Wright
- Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK.
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1483
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Szűcs Z, Plaszkó T, Cziáky Z, Kiss-Szikszai A, Emri T, Bertóti R, Sinka LT, Vasas G, Gonda S. Endophytic fungi from the roots of horseradish (Armoracia rusticana) and their interactions with the defensive metabolites of the glucosinolate - myrosinase - isothiocyanate system. BMC PLANT BIOLOGY 2018; 18:85. [PMID: 29743024 PMCID: PMC5944135 DOI: 10.1186/s12870-018-1295-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 04/26/2018] [Indexed: 05/05/2023]
Abstract
BACKGROUND The health of plants is heavily influenced by the intensively researched plant microbiome. The microbiome has to cope with the plant's defensive secondary metabolites to survive and develop, but studies that describe this interaction are rare. In the current study, we describe interactions of endophytic fungi with a widely researched chemical defense system, the glucosinolate - myrosinase - isothiocyanate system. The antifungal isothiocyanates are also of special interest because of their beneficial effects on human consumers. RESULTS Seven endophytic fungi were isolated from horseradish roots (Armoracia rusticana), from the genera Fusarium, Macrophomina, Setophoma, Paraphoma and Oidiodendron. LC-ESI-MS analysis of the horseradish extract incubated with these fungi showed that six of seven strains could decompose different classes of glucosinolates. Aliphatic, aromatic, thiomethylalkyl and indolic glucosinolates were decomposed by different strains at different rates. SPME-GC-MS measurements showed that two strains released significant amounts of allyl isothiocyanate into the surrounding air, but allyl nitrile was not detected. The LC-ESI-MS analysis of many strains' media showed the presence of allyl isothiocyanate - glutathione conjugate during the decomposition of sinigrin. Four endophytic strains also accepted sinigrin as the sole carbon source. Isothiocyanates inhibited the growth of fungi at various concentrations, phenylethyl isothiocyanate was more potent than allyl isothiocyanate (mean IC50 was 2.30-fold lower). As a control group, ten soil fungi from the same soil were used. They decomposed glucosinolates with lower overall efficiency: six of ten strains had insignificant or weak activities and only three could use sinigrin as a carbon source. The soil fungi also showed lower AITC tolerance in the growth inhibition assay: the median IC50 values were 0.1925 mM for endophytes and 0.0899 mM for soil fungi. CONCLUSIONS The host's glucosinolates can be used by the tested endophytic fungi as nutrients or to gain competitive advantage over less tolerant species. These activities were much less apparent among the soil fungi. This suggests that the endophytes show adaptation to the host plant's secondary metabolites and that host metabolite specific activities are enriched in the root microbiome. The results present background mechanisms enabling an understanding of how plants shape their microbiome.
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Affiliation(s)
- Zsolt Szűcs
- Department of Botany, Division of Pharmacognosy, University of Debrecen, Egyetem tér 1, Debrecen, H-4010 Hungary
| | - Tamás Plaszkó
- Department of Botany, Division of Pharmacognosy, University of Debrecen, Egyetem tér 1, Debrecen, H-4010 Hungary
| | - Zoltán Cziáky
- Agricultural and Molecular Research and Service Institute, University of Nyíregyháza, Sóstói str. 31/b, Nyíregyháza, H-4400 Hungary
| | - Attila Kiss-Szikszai
- Department of Organic Chemistry, University of Debrecen, Egyetem tér 1, Debrecen, H-4010 Hungary
| | - Tamás Emri
- Department of Biotechnology and Microbiology, University of Debrecen, Egyetem tér 1, Debrecen, H-4010 Hungary
| | - Regina Bertóti
- Department of Pharmacognosy, Semmelweis University, Üllői út 26, Budapest, H-1085 Hungary
| | - László Tamás Sinka
- Agricultural and Molecular Research and Service Institute, University of Nyíregyháza, Sóstói str. 31/b, Nyíregyháza, H-4400 Hungary
| | - Gábor Vasas
- Department of Botany, Division of Pharmacognosy, University of Debrecen, Egyetem tér 1, Debrecen, H-4010 Hungary
| | - Sándor Gonda
- Department of Botany, Division of Pharmacognosy, University of Debrecen, Egyetem tér 1, Debrecen, H-4010 Hungary
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1484
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Simon-Delso N, San Martin G, Bruneau E, Hautier L. Time-to-death approach to reveal chronic and cumulative toxicity of a fungicide for honeybees not revealed with the standard ten-day test. Sci Rep 2018; 8:7241. [PMID: 29739960 PMCID: PMC5940668 DOI: 10.1038/s41598-018-24746-9] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 04/04/2018] [Indexed: 01/02/2023] Open
Abstract
Synthetic fungicides are pesticides widely used in agriculture to control phytopathogenic fungi. The systemicity, persistency and intense application of some of these fungicides, such as boscalid, leads to long periods of exposure for honeybees via contaminated water, pollen and nectar. We exposed adult honeybees in the lab to food contaminated with boscalid for 33 days instead of the standard 10-day test. Most of the toxic effects were observed after 10 days. The median time to death (LT50) ranged from 24.9 days (lowest concentration) to 7.1 days (highest concentration) and was significantly shorter in all cases than with the control (32.0 days). The concentration and dietary doses of boscalid inducing 50% mortality (LC50 and LDD50, respectively) decreased strongly with the time of exposure: LC50 = 14,729 and 1,174 mg/l and LDD50 = 0.318 and 0.0301 mg bee−1 day−1 at days 8 and 25, respectively. We found evidence of reinforced toxicity when exposure is prolonged, but with an unusual pattern: no cumulative toxicity is observed until 17–18 days, when a point of inflexion appears that suggests a reduced capacity of bees to deal with the toxicant. Our results show the importance of time-to-death experiments rather than fixed-duration studies for evaluating chronic toxicity.
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Affiliation(s)
- Noa Simon-Delso
- Beekeeping Research and Information Centre (CARI), Place Croix du Sud 4, 1348, Louvain la Neuve, Belgium.
| | - Gilles San Martin
- Walloon Agricultural Research Centre, Life Sciences Department, Plant Protection and Ecotoxicology Unit, Rue de Liroux, 2, B-5030, Gembloux, Belgium
| | - Etienne Bruneau
- Beekeeping Research and Information Centre (CARI), Place Croix du Sud 4, 1348, Louvain la Neuve, Belgium
| | - Louis Hautier
- Walloon Agricultural Research Centre, Life Sciences Department, Plant Protection and Ecotoxicology Unit, Rue de Liroux, 2, B-5030, Gembloux, Belgium
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1485
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Chromosomal barcoding as a tool for multiplexed phenotypic characterization of laboratory evolved lineages. Sci Rep 2018; 8:6961. [PMID: 29725068 PMCID: PMC5934437 DOI: 10.1038/s41598-018-25201-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 04/04/2018] [Indexed: 11/15/2022] Open
Abstract
Adaptive laboratory evolution is an important tool to evolve organisms to increased tolerance towards different physical and chemical stress. It is applied to study the evolution of antibiotic resistance as well as genetic mechanisms underlying improvements in production strains. Adaptive evolution experiments can be automated in a high-throughput fashion. However, the characterization of the resulting lineages can become a time consuming task, when the performance of each lineage is evaluated individually. Here, we present a novel method for the markerless insertion of randomized genetic barcodes into the genome of Escherichia coli using a novel dual-auxotrophic selection approach. The barcoded E. coli library allows multiplexed phenotyping of evolved strains in pooled competition experiments. We use the barcoded library in an adaptive evolution experiment; evolving resistance towards three common antibiotics. Comparing this multiplexed phenotyping with conventional susceptibility testing and growth-rate measurements we can show a significant positive correlation between the two approaches. Use of barcoded bacterial strain libraries for individual adaptive evolution experiments drastically reduces the workload of characterizing the resulting phenotypes and enables prioritization of lineages for in-depth characterization. In addition, barcoded clones open up new ways to profile community dynamics or to track lineages in vivo or situ.
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1486
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Mayfield DB, Skall DG. Benchmark dose analysis framework for developing wildlife toxicity reference values. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2018; 37:1496-1508. [PMID: 29315767 DOI: 10.1002/etc.4082] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 11/14/2017] [Accepted: 01/08/2018] [Indexed: 06/07/2023]
Abstract
The effects characterization phase of ecological risk assessments (ERAs) often includes the selection or development of toxicity reference values (TRVs) for chemicals under investigation. In wildlife risk assessments, TRVs are thresholds represented by a dose or concentration associated with a specified adverse response. Traditionally, a TRV may be derived from an estimate of the no-observed-adverse effect level or lowest-observed-adverse-effect level, identified from a controlled toxicity study. Because of the limitations of this approach, risk assessors are increasingly developing TRVs using alternative methods. Benchmark dose (BMD) analysis is widely recognized as one approach for developing TRVs. A BMD is derived using the full dose-response relationship from all experimental doses and may represent a user-specified response level (e.g., 5, 10, 20, or 50%). Although many regulatory programs consider the use of BMD-derived wildlife TRVs, there is limited guidance available for implementing the BMD approach, particularly for ERA. The present study provides a framework for ecological risk assessors to identify appropriate data, examine dose-response relationships, estimate BMDs, and document the results for use in risk analysis. This framework demonstrates the process of developing a TRV using BMD analysis and identifies applications for which this approach may enhance ERAs (e.g., site assessment, chemical or pesticide registration programs). Environ Toxicol Chem 2018;37:1496-1508. © 2018 SETAC.
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1487
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Phillips NE, Rouchon AM. A dose-dependent relationship between copper burden in female urchin gonads and developmental impairment of their offspring. MARINE ENVIRONMENTAL RESEARCH 2018; 136:120-125. [PMID: 29453134 DOI: 10.1016/j.marenvres.2018.01.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 01/23/2018] [Accepted: 01/29/2018] [Indexed: 06/08/2023]
Abstract
We examined transgenerational effects of exposure to copper on early development of offspring in the urchin Evechinus chloroticus, and whether parental exposure mediated offspring response to a further low level exposure to copper during early development. Month-long exposure to elevated copper (25 μgL-1) in the laboratory increased copper in gonads of both males and females and reduced gonad size by almost half. There was a negative relationship between adult size and copper burden. Normal larval development and larval size four days after fertilization were both strongly, negatively related to the amount of copper in female gonads in a dose-dependent manner, but fertilization success was unaffected. This demonstrates a transgenerational effect of maternal exposure to copper pollution on offspring performance that is mediated by individual traits of females, but no evidence of strong paternal effects, nor of a low level of copper in the water in which early development occurs.
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Affiliation(s)
- Nicole E Phillips
- School of Biological Sciences and Coastal Ecology Laboratory, Victoria University of Wellington, P.O. Box 600, Wellington, 6140, New Zealand.
| | - Agnes M Rouchon
- School of Biological Sciences and Coastal Ecology Laboratory, Victoria University of Wellington, P.O. Box 600, Wellington, 6140, New Zealand
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1488
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Bracamonte E, Silveira HMD, Alcántara-de la Cruz R, Domínguez-Valenzuela JA, Cruz-Hipolito HE, De Prado R. From tolerance to resistance: mechanisms governing the differential response to glyphosate in Chloris barbata. PEST MANAGEMENT SCIENCE 2018; 74:1118-1124. [PMID: 29384251 DOI: 10.1002/ps.4874] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 01/22/2018] [Accepted: 01/22/2018] [Indexed: 05/11/2023]
Abstract
BACKGROUND Susceptibility and the mechanism (s) governing tolerance/resistance to glyphosate were characterized in two putative-glyphosate-resistant Chloris barbata populations (R1 and R2), collected in Persian lime orchards from Colima State, Mexico, comparing them with one non-treated population (referred to as S). RESULTS Glyphosate doses required to reduce fresh weight or cause mortality by 50% were 4.2-6.4 times higher in resistant populations than in the S population. The S population accumulated 4.3 and 5.2 times more shikimate than the R2 and R1 populations, respectively. There were no differences in 14 C-glyphosate uptake between R and S populations, but the R plants translocated at least 12% less herbicide to the rest of plant and roots 96 h after treatment. Insignificant amounts of glyphosate were metabolized to aminomethyl phosphonate and glyoxylate in both R and S plants. The 5-enolpyruvylshikimate-3-phosphate synthase gene of the R populations contained the Pro106-Ser mutation, giving them a resistance 12 (R2) and 14.7 (R1) times greater at target-site level compared with the S population. CONCLUSION The Pro106-Ser mutation governs the resistance to glyphosate of the R1 and R2 C barbata populations, but the impaired translocation could contribute to the resistance. These results confirm the first case of glyphosate resistance evolved in this species. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Enzo Bracamonte
- Faculty of Agricultural Sciences, National University of Cordoba (UNC), Cordoba, Argentina
| | | | | | | | | | - Rafael De Prado
- Department of Agricultural Chemistry and Edaphology, University of Cordoba, Cordoba, Spain
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1489
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Antibiotic combination efficacy (ACE) networks for a Pseudomonas aeruginosa model. PLoS Biol 2018; 16:e2004356. [PMID: 29708964 PMCID: PMC5945231 DOI: 10.1371/journal.pbio.2004356] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 05/10/2018] [Accepted: 03/28/2018] [Indexed: 11/19/2022] Open
Abstract
The spread of antibiotic resistance is always a consequence of evolutionary processes. The consideration of evolution is thus key to the development of sustainable therapy. Two main factors were recently proposed to enhance long-term effectiveness of drug combinations: evolved collateral sensitivities between the drugs in a pair and antagonistic drug interactions. We systematically assessed these factors by performing over 1,600 evolution experiments with the opportunistic nosocomial pathogen Pseudomonas aeruginosa in single- and multidrug environments. Based on the growth dynamics during these experiments, we reconstructed antibiotic combination efficacy (ACE) networks as a new tool for characterizing the ability of the tested drug combinations to constrain bacterial survival as well as drug resistance evolution across time. Subsequent statistical analysis of the influence of the factors on ACE network characteristics revealed that (i) synergistic drug interactions increased the likelihood of bacterial population extinction-irrespective of whether combinations were compared at the same level of inhibition or not-while (ii) the potential for evolved collateral sensitivities between 2 drugs accounted for a reduction in bacterial adaptation rates. In sum, our systematic experimental analysis allowed us to pinpoint 2 complementary determinants of combination efficacy and to identify specific drug pairs with high ACE scores. Our findings can guide attempts to further improve the sustainability of antibiotic therapy by simultaneously reducing pathogen load and resistance evolution.
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1490
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Foerster S, Desilvestro V, Hathaway LJ, Althaus CL, Unemo M. A new rapid resazurin-based microdilution assay for antimicrobial susceptibility testing of Neisseria gonorrhoeae. J Antimicrob Chemother 2018; 72:1961-1968. [PMID: 28431096 PMCID: PMC5890744 DOI: 10.1093/jac/dkx113] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 03/19/2017] [Indexed: 12/27/2022] Open
Abstract
Objectives Rapid, cost-effective and objective methods for antimicrobial susceptibility testing of Neisseria gonorrhoeae would greatly enhance surveillance of antimicrobial resistance. Etest, disc diffusion and agar dilution methods are subjective, mostly laborious for large-scale testing and take ∼24 h. We aimed to develop a rapid broth microdilution assay using resazurin (blue), which is converted into resorufin (pink fluorescence) in the presence of viable bacteria. Methods The resazurin-based broth microdilution assay was established using 132 N. gonorrhoeae strains and the antimicrobials ceftriaxone, cefixime, azithromycin, spectinomycin, ciprofloxacin, tetracycline and penicillin. A regression model was used to estimate the MICs. Assay results were obtained in ∼7.5 h. Results The EC 50 of the dose-response curves correlated well with Etest MIC values (Pearson's r = 0.93). Minor errors resulting from misclassifications of intermediate strains were found for 9% of the samples. Major errors (susceptible strains misclassified as resistant) occurred for ceftriaxone (4.6%), cefixime (3.3%), azithromycin (0.6%) and tetracycline (0.2%). Only one very major error was found (a ceftriaxone-resistant strain misclassified as susceptible). Overall the sensitivity of the assay was 97.1% (95% CI 95.2-98.4) and the specificity 78.5% (95% CI 74.5-82.9). Conclusions A rapid, objective, high-throughput, quantitative and cost-effective broth microdilution assay was established for gonococci. For use in routine diagnostics without confirmatory testing, the specificity might remain suboptimal for ceftriaxone and cefixime. However, the assay is an effective low-cost method to evaluate novel antimicrobials and for high-throughput screening, and expands the currently available methodologies for surveillance of antimicrobial resistance in gonococci.
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Affiliation(s)
- Sunniva Foerster
- Institute for Infectious Diseases, University of Bern, Bern, Switzerland.,Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | | | - Lucy J Hathaway
- Institute for Infectious Diseases, University of Bern, Bern, Switzerland
| | - Christian L Althaus
- Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | - Magnus Unemo
- WHO Collaborating Centre for Gonorrhoea and other STIs, Örebro University, Örebro, Sweden
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1491
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Antonenko T, Shpakovsky D, Vorobyov M, Gracheva Y, Kharitonashvili E, Dubova L, Shevtsova E, Tafeenko V, Aslanov L, Iksanova A, Shtyrlin Y, Milaeva E. Antioxidative vs
cytotoxic activities of organotin complexes bearing 2,6-di-tert
-butylphenol moieties. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4381] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- T.A. Antonenko
- Department of Medicinal Chemistry and Fine Organic Synthesis; Lomonosov Moscow State University; Moscow 119991 Russia
| | - D.B. Shpakovsky
- Department of Medicinal Chemistry and Fine Organic Synthesis; Lomonosov Moscow State University; Moscow 119991 Russia
| | - M.A. Vorobyov
- Department of Medicinal Chemistry and Fine Organic Synthesis; Lomonosov Moscow State University; Moscow 119991 Russia
| | - Yu.A. Gracheva
- Department of Medicinal Chemistry and Fine Organic Synthesis; Lomonosov Moscow State University; Moscow 119991 Russia
| | - E.V. Kharitonashvili
- Department of Medicinal Chemistry and Fine Organic Synthesis; Lomonosov Moscow State University; Moscow 119991 Russia
| | - L.G. Dubova
- Institute of Physiologically Active Compounds of Russian Academy of Sciences; Chernogolovka 142432 Russia
| | - E.F. Shevtsova
- Institute of Physiologically Active Compounds of Russian Academy of Sciences; Chernogolovka 142432 Russia
| | - V.A. Tafeenko
- Department of Medicinal Chemistry and Fine Organic Synthesis; Lomonosov Moscow State University; Moscow 119991 Russia
| | - L.A. Aslanov
- Department of Medicinal Chemistry and Fine Organic Synthesis; Lomonosov Moscow State University; Moscow 119991 Russia
| | - A.G. Iksanova
- Kazan (Volga Region) Federal University; Kazan 420008 Russia
| | - Yu.G. Shtyrlin
- Kazan (Volga Region) Federal University; Kazan 420008 Russia
| | - E.R. Milaeva
- Department of Medicinal Chemistry and Fine Organic Synthesis; Lomonosov Moscow State University; Moscow 119991 Russia
- Kazan (Volga Region) Federal University; Kazan 420008 Russia
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1492
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Prevc A, Kranjc S, Cemazar M, Todorovic V, Zegura B, Novak M, Filipic M, Flezar MS, Kirbis IS, Rotter A, Brozic A, Zakelj MN, Poljak M, Hosnjak L, Groselj B, Strojan P, Sersa G. Dose-Modifying Factor of Radiation Therapy with Concurrent Cisplatin Treatment in HPV-Positive Squamous Cell Carcinoma: A Preclinical Study. Radiat Res 2018; 189:644-651. [PMID: 29652621 DOI: 10.1667/rr14984.1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Human papillomavirus (HPV) is an important etiological factor in oropharyngeal squamous cell carcinoma (SCC). Compared to HPV-negative tumors, HPV-positive oropharyngeal SCC has shown a better response to nonsurgical treatments. In this study, we determined the dose-modifying factors for HPV-positive tumors with single-dose irradiation, with or without low radiosensitizing doses of cisplatin. In vitro, we determined an increased radiosensitivity of HPV-positive SCC, which might be a consequence of HPV-induced changes in the cell cycle regulation and DNA damage response, leading to increased cell death. Additionally, compared to HPV-negative tumors, 30% higher radiosensitivity of HPV-positive tumors was determined by tumor growth delay monitoring in immunodeficient mice in vivo. Concurrent cisplatin treatment had an additive effect in both HPV-negative and HPV-positive tumors, resulting in 20% better response in HPV-positive tumors than in HPV-negative tumors.
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Affiliation(s)
- Ajda Prevc
- Departments of a Experimental Oncology, Institute of Oncology Ljubljana, 1000 Ljubljana, Slovenia
| | - Simona Kranjc
- Departments of a Experimental Oncology, Institute of Oncology Ljubljana, 1000 Ljubljana, Slovenia
| | - Maja Cemazar
- Departments of a Experimental Oncology, Institute of Oncology Ljubljana, 1000 Ljubljana, Slovenia.,d Faculty of Health Sciences, University of Primorska, 6310 Izola, Slovenia
| | - Vesna Todorovic
- Departments of a Experimental Oncology, Institute of Oncology Ljubljana, 1000 Ljubljana, Slovenia
| | - Bojana Zegura
- e Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, 1000 Ljubljana, Slovenia
| | - Matjaz Novak
- e Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, 1000 Ljubljana, Slovenia
| | - Metka Filipic
- e Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, 1000 Ljubljana, Slovenia
| | | | | | - Ana Rotter
- f Marine Biology Station, National Institute of Biology, 6330 Piran, Slovenia
| | - Andreja Brozic
- b Cytopathology, Institute of Oncology Ljubljana, 1000 Ljubljana, Slovenia
| | - Martina Niksic Zakelj
- Departments of a Experimental Oncology, Institute of Oncology Ljubljana, 1000 Ljubljana, Slovenia
| | - Mario Poljak
- h Microbiology and Immunology, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - Lea Hosnjak
- h Microbiology and Immunology, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - Blaz Groselj
- c Radiation Oncology, Institute of Oncology Ljubljana, 1000 Ljubljana, Slovenia
| | - Primoz Strojan
- c Radiation Oncology, Institute of Oncology Ljubljana, 1000 Ljubljana, Slovenia
| | - Gregor Sersa
- Departments of a Experimental Oncology, Institute of Oncology Ljubljana, 1000 Ljubljana, Slovenia.,i Faculty of Health Sciences, University of Ljubljana, 1000 Ljubljana, Slovenia
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1493
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Puisay A, Pilon R, Goiran C, Hédouin L. Thermal resistances and acclimation potential during coral larval ontogeny in Acropora pulchra. MARINE ENVIRONMENTAL RESEARCH 2018; 135:1-10. [PMID: 29395263 DOI: 10.1016/j.marenvres.2018.01.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 12/26/2017] [Accepted: 01/02/2018] [Indexed: 06/07/2023]
Abstract
Rising temperature can adversely affect specific functions of corals. Coral gametes and planulae of Acropora pulchra were evaluated to determine their temperature resistances, and the potential of developmental thermal acclimation was examined on gametes. Results highlight that fertilization success displays a relatively high thermal resistance at ET50 (median effective temperature) 31.5 ± 0.5 °C after 4 h and 30 min. Additionally, probability of larval survival is halved at LT50 (median lethal temperature) 28.4 ± 0.42 °C after 14 days. The pre-exposure of oocytes to 30 °C and 32 °C for 1 h increases the cell development pace during fertilization at ambient temperature. Pre-exposure of gametes, separately at 32 °C for 1 h, increases fertilization success rate by 63% at 32°C, conversely, pre-exposure to 30 °C induces more variable results. These results evidenced the occurrence of developmental thermal acclimation as a result of thermal pre-exposure of oocytes.
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Affiliation(s)
- Antoine Puisay
- PSL Research University: EPHE-UPVD-CNRS, USR3278 CRIOBE, BP 1013, 98729, Papetoai, Moorea, French Polynesia; Laboratoire d'Excellence "Corail", New Caledonia.
| | - Rosanne Pilon
- PSL Research University: EPHE-UPVD-CNRS, USR3278 CRIOBE, BP 1013, 98729, Papetoai, Moorea, French Polynesia; Laboratoire d'Excellence "Corail", New Caledonia
| | - Claire Goiran
- Laboratoire d'Excellence "Corail", New Caledonia; ISEA, Université de la Nouvelle Calédonie, BP R4, 98851, Nouméa Cedex, New Caledonia
| | - Laetitia Hédouin
- PSL Research University: EPHE-UPVD-CNRS, USR3278 CRIOBE, BP 1013, 98729, Papetoai, Moorea, French Polynesia; Laboratoire d'Excellence "Corail", New Caledonia
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1494
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Philippe C, Grégoir AF, Thoré ESJ, Brendonck L, De Boeck G, Pinceel T. Acute sensitivity of the killifish Nothobranchius furzeri to a combination of temperature and reference toxicants (cadmium, chlorpyrifos and 3,4-dichloroaniline). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:10029-10038. [PMID: 29380199 DOI: 10.1007/s11356-018-1278-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2017] [Accepted: 01/11/2018] [Indexed: 06/07/2023]
Abstract
Aquatic organisms of inland waters are often subjected to a combination of stressors. Yet, few experiments assess mixed stress effects beyond a select group of standard model organisms. We studied the joint toxicity of reference toxicants and increased temperature on the turquoise killifish, Nothobranchius furzeri, a promising model for ecotoxicological research due to the species' short life cycle and the production of drought-resistant eggs. The acute sensitivity of the larval stage (2dph) to three compounds (cadmium, 3,4-dichloroaniline and chlorpyrifos) was tested in combination with a temperature increase of 4 °C, mimicking global warming. Dose-response relationships were used to calculate 96h-LC50 of 0.28 mg/L (24 °C) and 0.39 mg/L (28 °C) for cadmium, 96h-LC50 of 9.75 mg/L (24 °C) and 6.61 mg/L (28 °C) for 3,4-dichloroaniline and 96h-LC50 of 15.4 μg/L (24 °C) and 14.2 μg/L (28 °C) for chlorpyrifos. After 24 h of exposure, the toxicity of all tested compounds was exacerbated under increased temperature. Furthermore, the interaction effect of cadmium and temperature could be predicted by the stress addition model (SAM). This suggests the applicability of the model for fish and at the same time indicates that the model could be suitable to predict effects of temperature-toxicant interactions.
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Affiliation(s)
- Charlotte Philippe
- Laboratory of Aquatic Ecology, Evolution and Conservation, University of Leuven, Charles Deberiotstraat 32, 3000, Leuven, Belgium.
- Systemic Physiological and Ecotoxicological Research, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium.
| | - Arnout F Grégoir
- Laboratory of Aquatic Ecology, Evolution and Conservation, University of Leuven, Charles Deberiotstraat 32, 3000, Leuven, Belgium
| | - Eli S J Thoré
- Laboratory of Aquatic Ecology, Evolution and Conservation, University of Leuven, Charles Deberiotstraat 32, 3000, Leuven, Belgium
| | - Luc Brendonck
- Laboratory of Aquatic Ecology, Evolution and Conservation, University of Leuven, Charles Deberiotstraat 32, 3000, Leuven, Belgium
| | - Gudrun De Boeck
- Systemic Physiological and Ecotoxicological Research, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Tom Pinceel
- Laboratory of Aquatic Ecology, Evolution and Conservation, University of Leuven, Charles Deberiotstraat 32, 3000, Leuven, Belgium
- Centre for Environmental Management, University of the Free State, P.O. Box 339, Bloemfontein, 9300, South Africa
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1495
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Di Rienzi SC, Jacobson J, Kennedy EA, Bell ME, Shi Q, Waters JL, Lawrence P, Brenna JT, Britton RA, Walter J, Ley RE. Resilience of small intestinal beneficial bacteria to the toxicity of soybean oil fatty acids. eLife 2018; 7:e32581. [PMID: 29580380 PMCID: PMC5902164 DOI: 10.7554/elife.32581] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 03/14/2018] [Indexed: 12/15/2022] Open
Abstract
Over the past century, soybean oil (SBO) consumption in the United States increased dramatically. The main SBO fatty acid, linoleic acid (18:2), inhibits in vitro the growth of lactobacilli, beneficial members of the small intestinal microbiota. Human-associated lactobacilli have declined in prevalence in Western microbiomes, but how dietary changes may have impacted their ecology is unclear. Here, we compared the in vitro and in vivo effects of 18:2 on Lactobacillus reuteri and L. johnsonii. Directed evolution in vitro in both species led to strong 18:2 resistance with mutations in genes for lipid biosynthesis, acid stress, and the cell membrane or wall. Small-intestinal Lactobacillus populations in mice were unaffected by chronic and acute 18:2 exposure, yet harbored both 18:2- sensitive and resistant strains. This work shows that extant small intestinal lactobacilli are protected from toxic dietary components via the gut environment as well as their own capacity to evolve resistance.
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Affiliation(s)
- Sara C Di Rienzi
- Department of Microbiome ScienceMax Planck Institute for Developmental BiologyTübingenGermany
- Department of Molecular Biology and GeneticsCornell UniversityIthacaUnited States
| | - Juliet Jacobson
- Department of Molecular Biology and GeneticsCornell UniversityIthacaUnited States
| | - Elizabeth A Kennedy
- Department of Molecular Biology and GeneticsCornell UniversityIthacaUnited States
| | - Mary E Bell
- Department of Molecular Biology and GeneticsCornell UniversityIthacaUnited States
| | - Qiaojuan Shi
- Department of Molecular Biology and GeneticsCornell UniversityIthacaUnited States
| | - Jillian L Waters
- Department of Microbiome ScienceMax Planck Institute for Developmental BiologyTübingenGermany
- Department of Molecular Biology and GeneticsCornell UniversityIthacaUnited States
| | - Peter Lawrence
- Division of Nutritional SciencesCornell UniversityIthacaUnited States
| | - J Thomas Brenna
- Division of Nutritional SciencesCornell UniversityIthacaUnited States
- Dell Pediatric Research Institute, Dell Medical SchoolUniversity of Texas at AustinAustinUnited States
| | - Robert A Britton
- Department of Molecular Virology and MicrobiologyBaylor College of MedicineHoustonUnited States
| | - Jens Walter
- Department of Agricultural, Food, and Nutritional ScienceUniversity of AlbertaEdmontonCanada
- Department of Biological SciencesUniversity of AlbertaEdmontonCanada
| | - Ruth E Ley
- Department of Microbiome ScienceMax Planck Institute for Developmental BiologyTübingenGermany
- Department of Molecular Biology and GeneticsCornell UniversityIthacaUnited States
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1496
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Dere E, Anderson LM, Huse SM, Spade DJ, McDonnell-Clark E, Madnick SJ, Hall SJ, Camacho L, Lewis SM, Vanlandingham MM, Boekelheide K. Effects of continuous bisphenol A exposure from early gestation on 90 day old rat testes function and sperm molecular profiles: A CLARITY-BPA consortium study. Toxicol Appl Pharmacol 2018; 347:1-9. [PMID: 29596923 DOI: 10.1016/j.taap.2018.03.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 02/28/2018] [Accepted: 03/19/2018] [Indexed: 12/17/2022]
Abstract
Bisphenol A (BPA) is a ubiquitous industrial chemical that has been identified as an endocrine disrupting compound (EDC). There is growing concern that early life exposures to EDCs, such as BPA, can adversely affect the male reproductive tract and function. This study was conducted as part of the Consortium Linking Academic and Regulatory Insights on BPA Toxicity (CLARITY-BPA) to further delineate the toxicities associated with continuous exposure to BPA from early gestation, and to comprehensively examine the elicited effects on testes and sperm. NCTR Sprague Dawley rat dams were gavaged from gestational day (GD) 6 until parturition, and their pups were directly gavaged daily from postnatal day (PND) 1 to 90 with BPA (2.5, 25, 250, 2500, 25,000, 250,000 μg/kg/d) or vehicle control. At PND 90, the testes and sperm were collected for evaluation. The testes were histologically evaluated for altered germ cell apoptosis, sperm production, and altered spermiation. RNA and DNA isolated from sperm were assessed for elicited changes in global mRNA transcript abundance and altered DNA methylation. Effects of BPA were observed in changes in body, testis and epididymis weights only at the highest administered dose of BPA of 250,000 μg/kg/d. Genome-wide transcriptomic and epigenomic analyses failed to detect robust alterations in sperm mRNA and DNA methylation levels. These data indicate that prolonged exposure starting in utero to BPA over a wide range of levels has little, if any, impact on the testes and sperm molecular profiles of 90 day old rats as assessed by the histopathologic, morphometric, and molecular endpoints evaluated.
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Affiliation(s)
- Edward Dere
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, United States; Division of Urology, Rhode Island Hospital, Providence, RI, United States
| | - Linnea M Anderson
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, United States
| | - Susan M Huse
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, United States
| | - Daniel J Spade
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, United States
| | | | - Samantha J Madnick
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, United States
| | - Susan J Hall
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, United States
| | - Luísa Camacho
- Division of Biochemical Toxicology, National Center for Toxicological Research, Jefferson, AR, United States
| | - Sherry M Lewis
- Office of Scientific Coordination, National Center for Toxicological Research, Jefferson, AR, United States
| | - Michelle M Vanlandingham
- Division of Biochemical Toxicology, National Center for Toxicological Research, Jefferson, AR, United States
| | - Kim Boekelheide
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, United States.
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1497
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Coyle JP, Rinaldi RJ, Johnson GT, Bourgeois MM, McCluskey JD, Harbison RD. Reduced oxygen tension culturing conditionally alters toxicogenic response of differentiated H9c2 cardiomyoblasts to acrolein. Toxicol Mech Methods 2018; 28:488-498. [PMID: 29564938 DOI: 10.1080/15376516.2018.1455785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Acrolein is a reactive electrophilic aldehyde known to cause mitochondrial dysfunction, oxidative stress, and dysregulation of signaling transduction in vitro. Most in vitro systems employ standard cell culture maintenance conditions of 95% air/5% CO2, translating to a culture oxygen tension of approximately 20%, far above most physiological tissues. The purpose of this investigation was to examine whether low-serum, retinoic acid differentiated H9c2 cells were less sensitive to acrolein insult when cultured under reduced oxygen tension. H9c2 cells were maintained separately in 20% and 5% oxygen, differentiated for 5 d, and then exposed to acrolein for 30 min in media containing varying concentrations of tricarboxylic acid and glycolytic substrates, followed by fresh medium replacement. Cells were then assessed for MTT reduction at 2 h and 24 h after acrolein insult. We showed that pyruvate supplementation in combination with lowered oxygen culturing significantly attenuated acrolein-induced viability loss at 24 h. Poly(ADP-ribose) polymerase inhibition and EGTA preferentially provided partial rescue to low oxygen cultures, but not for standard cultures. Collectively, these results offer evidence supporting altered toxicogenic response of H9c2 during physiologically relevant oxygen tension culturing.
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Affiliation(s)
- Jayme P Coyle
- a Department of Environmental and Occupational Heath , College of Public Health, University of South Florida , Tampa , FL , USA
| | - Robert J Rinaldi
- b Department of Integrative Biology , College of Arts and Sciences, University of South Florida , Tampa , FL , USA
| | - Giffe T Johnson
- a Department of Environmental and Occupational Heath , College of Public Health, University of South Florida , Tampa , FL , USA
| | - Marie M Bourgeois
- a Department of Environmental and Occupational Heath , College of Public Health, University of South Florida , Tampa , FL , USA
| | - James D McCluskey
- a Department of Environmental and Occupational Heath , College of Public Health, University of South Florida , Tampa , FL , USA
| | - Raymond D Harbison
- a Department of Environmental and Occupational Heath , College of Public Health, University of South Florida , Tampa , FL , USA
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1498
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PDGFRα+ pericryptal stromal cells are the critical source of Wnts and RSPO3 for murine intestinal stem cells in vivo. Proc Natl Acad Sci U S A 2018; 115:E3173-E3181. [PMID: 29559533 PMCID: PMC5889626 DOI: 10.1073/pnas.1713510115] [Citation(s) in RCA: 200] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Tissue stem cells in vivo reside in highly structured niches that provide signals for proliferation and differentiation. Understanding the role of the niche requires identifying the key cell types that provide these regulators. In the intestine, R-spondins and Wnts are essential regulators of the stem-cell niche. Here we identify subepithelial myofibroblasts of the PDGF receptor α lineage as the specific stromal cell type that secretes these ligands. These data demonstrate the close interaction between epithelial stem cells and the underlying regulatory stroma niche and provide insights into both normal homeostasis and tissue recovery after injury. Wnts and R-spondins (RSPOs) support intestinal homeostasis by regulating crypt cell proliferation and differentiation. Ex vivo, Wnts secreted by Paneth cells in organoids can regulate the proliferation and differentiation of Lgr5-expressing intestinal stem cells. However, in vivo, Paneth cell and indeed all epithelial Wnt production is completely dispensable, and the cellular source of Wnts and RSPOs that maintain the intestinal stem-cell niche is not known. Here we investigated both the source and the functional role of stromal Wnts and RSPO3 in regulation of intestinal homeostasis. RSPO3 is highly expressed in pericryptal myofibroblasts in the lamina propria and is several orders of magnitude more potent than RSPO1 in stimulating both Wnt/β-catenin signaling and organoid growth. Stromal Rspo3 ablation ex vivo resulted in markedly decreased organoid growth that was rescued by exogenous RSPO3 protein. Pdgf receptor alpha (PdgfRα) is known to be expressed in pericryptal myofibroblasts. We therefore evaluated if PdgfRα identified the key stromal niche cells. In vivo, Porcn excision in PdgfRα+ cells blocked intestinal crypt formation, demonstrating that Wnt production in the stroma is both necessary and sufficient to support the intestinal stem-cell niche. Mice with Rspo3 excision in the PdgfRα+ cells had decreased intestinal crypt Wnt/β-catenin signaling and Paneth cell differentiation and were hypersensitive when stressed with dextran sodium sulfate. The data support a model of the intestinal stem-cell niche regulated by both Wnts and RSPO3 supplied predominantly by stromal pericryptal myofibroblasts marked by PdgfRα.
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1499
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Cross-resistance to dicamba, 2,4-D, and fluroxypyr in Kochia scoparia is endowed by a mutation in an AUX/IAA gene. Proc Natl Acad Sci U S A 2018. [PMID: 29531066 DOI: 10.1073/pnas.1712372115] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The understanding and mitigation of the appearance of herbicide-resistant weeds have come to the forefront of study in the past decade, as the number of weed species that are resistant to one or more herbicide modes of action is on the increase. Historically, weed resistance to auxin herbicides has been rare, but examples, such as Kochia scoparia L. Schrad (kochia), have appeared, posing a challenge to conventional agricultural practices. Reports of dicamba-resistant kochia populations began in the early 1990s in areas where auxin herbicides were heavily utilized for weed control in corn and wheat cropping systems, and some biotypes are resistant to other auxin herbicides as well. We have further characterized the auxin responses of one previously reported dicamba-resistant biotype isolated from western Nebraska and found that it is additionally cross-resistant to other auxin herbicides, including 2,4-dichlorophenoxyacetic acid (2,4-D) and fluroxypyr. We have utilized transcriptome sequencing and comparison to identify a 2-nt base change in this biotype, which results in a glycine to asparagine amino acid change within a highly conserved region of an AUX/indole-3-acetic acid (IAA) protein, KsIAA16. Through yeast two-hybrid analysis, characterization of F2 segregation, and heterologous expression and characterization of the gene in Arabidopsis thaliana, we show that that the single dominant KsIAA16R resistance allele is the causal basis for dicamba resistance in this population. Furthermore, we report the development of a molecular marker to identify this allele in populations and facilitate inheritance studies. We also report that the resistance allele confers a fitness penalty in greenhouse studies.
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1500
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Klaeger S, Heinzlmeir S, Wilhelm M, Polzer H, Vick B, Koenig PA, Reinecke M, Ruprecht B, Petzoldt S, Meng C, Zecha J, Reiter K, Qiao H, Helm D, Koch H, Schoof M, Canevari G, Casale E, Depaolini SR, Feuchtinger A, Wu Z, Schmidt T, Rueckert L, Becker W, Huenges J, Garz AK, Gohlke BO, Zolg DP, Kayser G, Vooder T, Preissner R, Hahne H, Tõnisson N, Kramer K, Götze K, Bassermann F, Schlegl J, Ehrlich HC, Aiche S, Walch A, Greif PA, Schneider S, Felder ER, Ruland J, Médard G, Jeremias I, Spiekermann K, Kuster B. The target landscape of clinical kinase drugs. Science 2018; 358:358/6367/eaan4368. [PMID: 29191878 DOI: 10.1126/science.aan4368] [Citation(s) in RCA: 520] [Impact Index Per Article: 86.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 09/20/2017] [Indexed: 02/06/2023]
Abstract
Kinase inhibitors are important cancer therapeutics. Polypharmacology is commonly observed, requiring thorough target deconvolution to understand drug mechanism of action. Using chemical proteomics, we analyzed the target spectrum of 243 clinically evaluated kinase drugs. The data revealed previously unknown targets for established drugs, offered a perspective on the "druggable" kinome, highlighted (non)kinase off-targets, and suggested potential therapeutic applications. Integration of phosphoproteomic data refined drug-affected pathways, identified response markers, and strengthened rationale for combination treatments. We exemplify translational value by discovering SIK2 (salt-inducible kinase 2) inhibitors that modulate cytokine production in primary cells, by identifying drugs against the lung cancer survival marker MELK (maternal embryonic leucine zipper kinase), and by repurposing cabozantinib to treat FLT3-ITD-positive acute myeloid leukemia. This resource, available via the ProteomicsDB database, should facilitate basic, clinical, and drug discovery research and aid clinical decision-making.
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Affiliation(s)
- Susan Klaeger
- Chair of Proteomics and Bioanalytics, Technical University of Munich (TUM), Freising, Germany.,German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Stephanie Heinzlmeir
- Chair of Proteomics and Bioanalytics, Technical University of Munich (TUM), Freising, Germany.,German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Mathias Wilhelm
- Chair of Proteomics and Bioanalytics, Technical University of Munich (TUM), Freising, Germany
| | - Harald Polzer
- German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany.,Department of Internal Medicine III, University Hospital, Ludwig-Maximilians-Universität (LMU) München, Munich, Germany
| | - Binje Vick
- German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany.,Department of Apoptosis in Hematopoietic Stem Cells, Helmholtz Center Munich, German Center for Environmental Health (HMGU), Munich, Germany
| | | | - Maria Reinecke
- Chair of Proteomics and Bioanalytics, Technical University of Munich (TUM), Freising, Germany.,German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Benjamin Ruprecht
- Chair of Proteomics and Bioanalytics, Technical University of Munich (TUM), Freising, Germany
| | - Svenja Petzoldt
- Chair of Proteomics and Bioanalytics, Technical University of Munich (TUM), Freising, Germany.,German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Chen Meng
- Chair of Proteomics and Bioanalytics, Technical University of Munich (TUM), Freising, Germany
| | - Jana Zecha
- Chair of Proteomics and Bioanalytics, Technical University of Munich (TUM), Freising, Germany.,German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Katrin Reiter
- German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany.,Department of Internal Medicine III, University Hospital, Ludwig-Maximilians-Universität (LMU) München, Munich, Germany
| | - Huichao Qiao
- Chair of Proteomics and Bioanalytics, Technical University of Munich (TUM), Freising, Germany
| | - Dominic Helm
- Chair of Proteomics and Bioanalytics, Technical University of Munich (TUM), Freising, Germany
| | - Heiner Koch
- Chair of Proteomics and Bioanalytics, Technical University of Munich (TUM), Freising, Germany.,German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Melanie Schoof
- Chair of Proteomics and Bioanalytics, Technical University of Munich (TUM), Freising, Germany
| | | | - Elena Casale
- Oncology, Nerviano Medical Sciences Srl, Milan, Italy
| | | | - Annette Feuchtinger
- Research Unit Analytical Pathology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Zhixiang Wu
- Chair of Proteomics and Bioanalytics, Technical University of Munich (TUM), Freising, Germany
| | - Tobias Schmidt
- Chair of Proteomics and Bioanalytics, Technical University of Munich (TUM), Freising, Germany
| | | | | | | | - Anne-Kathrin Garz
- German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany.,Department of Medicine III, Klinikum rechts der Isar, TUM, Munich, Germany
| | - Bjoern-Oliver Gohlke
- German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany.,Structural Bioinformatics Group, Charité-Universitätsmedizin, Berlin, Germany
| | - Daniel Paul Zolg
- Chair of Proteomics and Bioanalytics, Technical University of Munich (TUM), Freising, Germany
| | - Gian Kayser
- Institute of Surgical Pathology, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Tonu Vooder
- Center of Thoracic Surgery, Krefeld, Germany.,Estonian Genome Center, University of Tartu, Tartu, Estonia.,Tartu University Hospital, Tartu, Estonia
| | - Robert Preissner
- German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany.,Structural Bioinformatics Group, Charité-Universitätsmedizin, Berlin, Germany
| | - Hannes Hahne
- Chair of Proteomics and Bioanalytics, Technical University of Munich (TUM), Freising, Germany
| | - Neeme Tõnisson
- Estonian Genome Center, University of Tartu, Tartu, Estonia.,Tartu University Hospital, Tartu, Estonia
| | - Karl Kramer
- Chair of Proteomics and Bioanalytics, Technical University of Munich (TUM), Freising, Germany
| | - Katharina Götze
- German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany.,Department of Medicine III, Klinikum rechts der Isar, TUM, Munich, Germany
| | - Florian Bassermann
- German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany.,Department of Medicine III, Klinikum rechts der Isar, TUM, Munich, Germany
| | | | | | | | - Axel Walch
- Research Unit Analytical Pathology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Philipp A Greif
- German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany.,Department of Internal Medicine III, University Hospital, Ludwig-Maximilians-Universität (LMU) München, Munich, Germany
| | - Sabine Schneider
- Department of Chemistry, TUM, Garching, Germany.,Center For Integrated Protein Science Munich (CIPSM), Munich, Germany
| | | | - Juergen Ruland
- German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany.,Institut für Klinische Chemie und Pathobiochemie, TUM, Munich, Germany
| | - Guillaume Médard
- Chair of Proteomics and Bioanalytics, Technical University of Munich (TUM), Freising, Germany
| | - Irmela Jeremias
- German Cancer Consortium (DKTK), Heidelberg, Germany.,Department of Apoptosis in Hematopoietic Stem Cells, Helmholtz Center Munich, German Center for Environmental Health (HMGU), Munich, Germany.,Department of Pediatrics, Dr von Hauner Children's Hospital, LMU, Munich, Germany
| | - Karsten Spiekermann
- German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany.,Department of Internal Medicine III, University Hospital, Ludwig-Maximilians-Universität (LMU) München, Munich, Germany
| | - Bernhard Kuster
- Chair of Proteomics and Bioanalytics, Technical University of Munich (TUM), Freising, Germany. .,German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany.,Center For Integrated Protein Science Munich (CIPSM), Munich, Germany.,Bavarian Biomolecular Mass Spectrometry Center (BayBioMS), TUM, Freising, Germany
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