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Pause L, Weimer A, Wirth NT, Nguyen AV, Lenz C, Kohlstedt M, Wittmann C, Nikel PI, Lai B, Krömer JO. Anaerobic glucose uptake in Pseudomonas putida KT2440 in a bioelectrochemical system. Microb Biotechnol 2024; 17:e14375. [PMID: 37990843 PMCID: PMC10832537 DOI: 10.1111/1751-7915.14375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 11/01/2023] [Accepted: 11/07/2023] [Indexed: 11/23/2023] Open
Abstract
Providing an anodic potential in a bio-electrochemical system to the obligate aerobe Pseudomonas putida enables anaerobic survival and allows the cells to overcome redox imbalances. In this setup, the bacteria could be exploited to produce chemicals via oxidative pathways at high yield. However, the absence of anaerobic growth and low carbon turnover rates remain as obstacles for the application of such an electro-fermentation technology. Growth and carbon turnover start with carbon uptake into the periplasm and cytosol. P. putida KT2440 has three native transporting systems for glucose, each differing in energy and redox demand. This architecture previously led to the hypothesis that internal redox and energy constraints ultimately limit cytoplasmic carbon utilization in a bio-electrochemical system. However, it remains largely unclear which uptake route is predominantly used by P. putida under electro-fermentative conditions. To elucidate this, we created three gene deletion mutants of P. putida KT2440, forcing the cells to exclusively utilize one of the routes. When grown in a bio-electrochemical system, the pathway mutants were heavily affected in terms of sugar consumption, current output and product formation. Surprisingly, however, we found that about half of the acetate formed in the cytoplasm originated from carbon that was put into the system via the inoculation biomass, while the other half came from the consumption of substrate. The deletion of individual sugar uptake routes did not alter significantly the secreted acetate concentrations among different strains even with different carbon sources. This means that the stoichiometry of the sugar uptake routes is not a limiting factor during electro-fermentation and that the low rates might be caused by other reasons, for example energy limitations or a yet-to-be-identified oxygen-dependent regulatory mechanism.
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Affiliation(s)
- Laura Pause
- Systems Biotechnology groupHelmholtz Centre for Environmental Research – UFZLeipzigGermany
| | - Anna Weimer
- Institute of Systems BiotechnologySaarland UniversitySaarbrückenGermany
| | - Nicolas T. Wirth
- Systems Environmental Microbiology Group, The Novo Nordisk Foundation Center for BiosustainabilityTechnical University of DenmarkLyngbyDenmark
| | - Anh Vu Nguyen
- Systems Biotechnology groupHelmholtz Centre for Environmental Research – UFZLeipzigGermany
| | - Claudius Lenz
- Systems Biotechnology groupHelmholtz Centre for Environmental Research – UFZLeipzigGermany
| | - Michael Kohlstedt
- Institute of Systems BiotechnologySaarland UniversitySaarbrückenGermany
| | | | - Pablo I. Nikel
- Systems Environmental Microbiology Group, The Novo Nordisk Foundation Center for BiosustainabilityTechnical University of DenmarkLyngbyDenmark
| | - Bin Lai
- BMBF Junior Research Group BiophotovoltaicsHelmholtz Centre for Environmental Research – UFZLeipzigGermany
| | - Jens O. Krömer
- Systems Biotechnology groupHelmholtz Centre for Environmental Research – UFZLeipzigGermany
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Kiselev A, Camborde L, Carballo LO, Kaschani F, Kaiser M, van der Hoorn RAL, Gaulin E. The root pathogen Aphanomyces euteiches secretes modular proteases in pea apoplast during host infection. Front Plant Sci 2023; 14:1140101. [PMID: 37051076 PMCID: PMC10084794 DOI: 10.3389/fpls.2023.1140101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Accepted: 02/24/2023] [Indexed: 06/19/2023]
Abstract
To successfully colonize the host, phytopathogens have developed a large repertoire of components to both combat the host plant defense mechanisms and to survive in adverse environmental conditions. Microbial proteases are predicted to be crucial components of these systems. In the present work, we aimed to identify active secreted proteases from the oomycete Aphanomyces euteiches, which causes root rot diseases on legumes. Genome mining and expression analysis highlighted an overrepresentation of microbial tandemly repeated proteases, which are upregulated during host infection. Activity Based Protein Profiling and mass spectrometry (ABPP-MS) on apoplastic fluids isolated from pea roots infected by the pathogen led to the identification of 35 active extracellular microbial proteases, which represents around 30% of the genes expressed encoding serine and cysteine proteases during infection. Notably, eight of the detected active secreted proteases carry an additional C-terminal domain. This study reveals novel active modular extracellular eukaryotic proteases as potential pathogenicity factors in Aphanomyces genus.
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Affiliation(s)
- Andrei Kiselev
- Laboratoire de Recherche en Sciences Végétales (LRSV), Université de Toulouse, CNRS, UPS, Toulouse INP, Auzeville-Tolosane, France
| | - Laurent Camborde
- Laboratoire de Recherche en Sciences Végétales (LRSV), Université de Toulouse, CNRS, UPS, Toulouse INP, Auzeville-Tolosane, France
| | - Laura Ossorio Carballo
- The Plant Chemetics Laboratory, Department of Plant Sciences, University of Oxford, Oxford, United Kingdom
| | - Farnusch Kaschani
- ZMB Chemical Biology, Faculty of Biology, University of Duisburg-Essen, Essen, Germany
| | - Markus Kaiser
- ZMB Chemical Biology, Faculty of Biology, University of Duisburg-Essen, Essen, Germany
| | - Renier A. L. van der Hoorn
- The Plant Chemetics Laboratory, Department of Plant Sciences, University of Oxford, Oxford, United Kingdom
| | - Elodie Gaulin
- Laboratoire de Recherche en Sciences Végétales (LRSV), Université de Toulouse, CNRS, UPS, Toulouse INP, Auzeville-Tolosane, France
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Tellum T, Bracco B, De Braud LV, Knez J, Ashton‐Barnett R, Amin T, Chaggar P, Jurkovic D. Reproductive outcome in 326 women with unicornuate uterus. Ultrasound Obstet Gynecol 2023; 61:99-108. [PMID: 36099518 PMCID: PMC10107309 DOI: 10.1002/uog.26073] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 08/27/2022] [Accepted: 09/05/2022] [Indexed: 05/27/2023]
Abstract
OBJECTIVES To study the reproductive outcomes of women with a unicornuate uterus and compare them to those of women with no congenital uterine anomaly. METHODS This was a single-center, retrospective cohort study. Cases were women aged at least 16 years who were diagnosed with a unicornuate uterus on transvaginal/transrectal ultrasound between January 2008 and September 2021. Controls were women with no congenital uterine anomaly matched 1:1 by age and body mass index. The primary outcome was live-birth rate. Secondary outcomes were pregnancy loss (miscarriage, ectopic pregnancy, termination of pregnancy), preterm delivery, mode of delivery and concomitant gynecological abnormalities (endometriosis, adenomyosis, fibroids). RESULTS Included in the study were 326 cases and 326 controls. Women with a unicornuate uterus had a significantly lower live-birth rate (184/388 (47.4%) vs 229/396 (57.8%); P = 0.004) and higher rates of overall miscarriage (178/424 (42.0%) vs 155/465 (33.3%); adjusted odds ratio (aOR), 2.21 (95% CI, 1.42-3.42), P < 0.001), ectopic pregnancy (26/424 (6.1%) vs 11/465 (2.4%); aOR, 2.52 (95% CI, 1.22-5.22), P = 0.01), preterm delivery (45/184 (24.5%) vs 17/229 (7.4%); aOR, 3.04 (95% CI, 1.52-5.97), P = 0.001) and Cesarean delivery (116/184 (63.0%) vs 70/229 (30.6%); aOR, 2.54 (95% CI, 1.67-3.88), P < 0.001). Rudimentary-horn pregnancies accounted for 7/26 (26.9%) ectopic pregnancies in the study group. Women with a unicornuate uterus were more likely to have endometriosis (17.5% vs 10.7%; P = 0.018) and adenomyosis (26.7% vs 15.6%; P = 0.001), but were not more likely to have fibroids compared with controls. Women with a functional rudimentary horn were more likely to have pelvic endometriosis compared to those without (odds ratio, 2.4 (95% CI, 1.4-4.1), P = 0.002). CONCLUSIONS Pregnant women with a unicornuate uterus should be classified as high risk. Removal of a functional rudimentary horn should be discussed with the patient to prevent a rudimentary-horn ectopic pregnancy. © 2022 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- T. Tellum
- Institute for Women's Health, Faculty of Population Health SciencesUniversity College LondonLondonUK
- Department of GynecologyOslo University HospitalOsloNorway
| | - B. Bracco
- Institute for Women's Health, Faculty of Population Health SciencesUniversity College LondonLondonUK
| | - L. V. De Braud
- Institute for Women's Health, Faculty of Population Health SciencesUniversity College LondonLondonUK
| | - J. Knez
- Clinic for GynecologyUniversity Medical Centre MariborMariborSlovenia
| | - R. Ashton‐Barnett
- Institute for Women's Health, Faculty of Population Health SciencesUniversity College LondonLondonUK
| | - T. Amin
- Institute for Women's Health, Faculty of Population Health SciencesUniversity College LondonLondonUK
| | - P. Chaggar
- Institute for Women's Health, Faculty of Population Health SciencesUniversity College LondonLondonUK
| | - D. Jurkovic
- Institute for Women's Health, Faculty of Population Health SciencesUniversity College LondonLondonUK
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Abbadi M, Basso A, Biasini L, Quartesan R, Buratin A, Davidovich N, Toffan A. Tilapia lake virus: A structured phylogenetic approach. Front Genet 2023; 14:1069300. [PMID: 37144122 PMCID: PMC10151519 DOI: 10.3389/fgene.2023.1069300] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 03/31/2023] [Indexed: 05/06/2023] Open
Abstract
Tilapia Lake Virus (TiLV), also known as Tilapia tilapinevirus, is an emerging pathogen affecting both wild and farmed tilapia (Oreochromis spp.), which is considered one of the most important fish species for human consumption. Since its first report in Israel in 2014, Tilapia Lake Virus has spread globally causing mortality rates up to 90%. Despite the huge socio-economic impact of this viral species, to date the scarce availability of Tilapia Lake Virus complete genomes is severely affecting the knowledge on the origin, evolution and epidemiology of this virus. Herein, along with the identification, isolation and complete genome sequencing of two Israeli Tilapia Lake Virus deriving from outbreaks occurred in tilapia farms in Israel in 2018, we performed a bioinformatics multifactorial approach aiming to characterize each genetic segment before carrying out phylogenetic analysis. Results highlighted the suitability of using the concatenated ORFs 1, 3, and 5 in order to obtain the most reliable, fixed and fully supported tree topology. Finally, we also attempted to investigate the presence of potential reassortment events in all the studied isolates. As a result, we report a reassortment event detected in segment 3 of isolate TiLV/Israel/939-9/2018 involved in the present study, and confirmed almost all the other events previously reported.
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Affiliation(s)
- Miriam Abbadi
- National Reference Laboratory for fish diseases, Istituto Zooprofilattico Sperimentale Delle Venezie, Legnaro, Padova, Italy
- *Correspondence: Miriam Abbadi,
| | - Andrea Basso
- National Reference Laboratory for fish diseases, Istituto Zooprofilattico Sperimentale Delle Venezie, Legnaro, Padova, Italy
| | - Lorena Biasini
- National Reference Laboratory for fish diseases, Istituto Zooprofilattico Sperimentale Delle Venezie, Legnaro, Padova, Italy
| | - Rosita Quartesan
- National Reference Laboratory for fish diseases, Istituto Zooprofilattico Sperimentale Delle Venezie, Legnaro, Padova, Italy
| | - Alessandra Buratin
- National Reference Laboratory for fish diseases, Istituto Zooprofilattico Sperimentale Delle Venezie, Legnaro, Padova, Italy
| | | | - Anna Toffan
- National Reference Laboratory for fish diseases, Istituto Zooprofilattico Sperimentale Delle Venezie, Legnaro, Padova, Italy
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Glehr G, Riquelme P, Yang Zhou J, Cordero L, Schilling HL, Kapinsky M, Schlitt HJ, Geissler EK, Burkhardt R, Schmidt B, Haferkamp S, Hutchinson JA, Kronenberg K. External validation of biomarkers for immune-related adverse events after immune checkpoint inhibition. Front Immunol 2022; 13:1011040. [PMID: 36248910 PMCID: PMC9556693 DOI: 10.3389/fimmu.2022.1011040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 09/08/2022] [Indexed: 11/25/2022] Open
Abstract
Immune checkpoint inhibitors have revolutionized treatment of advanced melanoma, but commonly cause serious immune-mediated complications. The clinical ambition of reserving more aggressive therapies for patients least likely to experience immune-related adverse events (irAE) has driven an extensive search for predictive biomarkers. Here, we externally validate the performance of 59 previously reported markers of irAE risk in a new cohort of 110 patients receiving Nivolumab (anti-PD1) and Ipilimumab (anti-CTLA-4) therapy. Alone or combined, the discriminatory value of these routine clinical parameters and flow cytometry biomarkers was poor. Unsupervised clustering of flow cytometry data returned four T cell subsets with higher discriminatory capacity for colitis than previously reported populations, but they cannot be considered as reliable classifiers. Although mechanisms predisposing some patients to particular irAEs have been described, we are presently unable to capture adequate information from pre-therapy flow cytometry and clinical data to reliably predict risk of irAE in most cases.
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Affiliation(s)
- Gunther Glehr
- Department of Surgery, University Hospital Regensburg, Regensburg, Germany
- *Correspondence: Gunther Glehr,
| | - Paloma Riquelme
- Department of Surgery, University Hospital Regensburg, Regensburg, Germany
| | - Jordi Yang Zhou
- Department of Surgery, University Hospital Regensburg, Regensburg, Germany
- Leibniz Institute for Immunotherapy, Regensburg, Germany
| | - Laura Cordero
- Department of Surgery, University Hospital Regensburg, Regensburg, Germany
| | | | | | - Hans J. Schlitt
- Department of Surgery, University Hospital Regensburg, Regensburg, Germany
| | - Edward K. Geissler
- Department of Surgery, University Hospital Regensburg, Regensburg, Germany
| | - Ralph Burkhardt
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Regensburg, Regensburg, Germany
| | - Barbara Schmidt
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
| | - Sebastian Haferkamp
- Department of Dermatology, University Hospital Regensburg, Regensburg, Germany
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Douhard F, Doeschl‐Wilson AB, Corbishley A, Hayward AD, Marcon D, Weisbecker J, Aguerre S, Bordes L, Jacquiet P, McNeilly TN, Sallé G, Moreno‐Romieux C. The cost of host genetic resistance on body condition: evidence from divergently selected sheep. Evol Appl 2022; 15:1374-1389. [PMID: 36187187 PMCID: PMC9488686 DOI: 10.1111/eva.13442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 06/16/2022] [Accepted: 06/19/2022] [Indexed: 11/26/2022] Open
Abstract
Trade‐offs between host resistance to parasites and host growth or reproduction can occur due to allocation of limited available resources between competing demands. To predict potential trade‐offs arising from genetic selection for host resistance, a better understanding of the associated nutritional costs is required. Here, we studied resistance costs by using sheep from lines divergently selected on their resistance to a common blood‐feeding gastro‐intestinal parasite (Haemonchus contortus). First, we assessed the effects of selection for high or low host resistance on condition traits (body weight, back fat, and muscle thickness) and infection traits (parasite fecal egg excretion and loss in blood haematocrit) at various life stages, in particular during the periparturient period when resource allocation to immunity may limit host resistance. Second, we analysed the condition–infection relationship to detect a possible trade‐off, in particular during the periparturient period. We experimentally infected young females in four stages over their first 2 years of life, including twice around parturition (at 1 year and at 2 years of age). Linear mixed‐model analyses revealed a large and consistent between‐line difference in infection traits during growth and outside of the periparturient period, whereas this difference was strongly attenuated during the periparturient period. Despite their different responses to infection, lines had similar body condition traits. Using covariance decomposition, we then found that the phenotypic relationship between infection and condition was dominated by direct infection costs arising from parasite development within the host. Accounting for these within‐individual effects, a cost of resistance on body weight was detected among ewes during their first reproduction. Although this cost and the reproductive constraint on resistance are unlikely to represent a major concern for animal breeding in nutrient‐rich environments, this study provides important new insights regarding the nutritional costs of parasite resistance at different lifestages and how these may affect response to selection.
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Affiliation(s)
- Frédéric Douhard
- GenPhySEUniversité de Toulouse, INRAE, ENVTCastanet‐TolosanFrance
| | - Andrea B. Doeschl‐Wilson
- The Roslin Institute and Royal (Dick) School of Veterinary StudiesUniversity of EdinburghEdinburghUK
| | - Alexander Corbishley
- The Roslin Institute and Royal (Dick) School of Veterinary StudiesUniversity of EdinburghEdinburghUK
| | | | | | | | - Sophie Aguerre
- GenPhySEUniversité de Toulouse, INRAE, ENVTCastanet‐TolosanFrance
| | - Léa Bordes
- UMR INRAE/ENVT 1225 IHAP, UMT Santé des Petits RuminantsEcole Nationale Vétérinaire de ToulouseToulouse cedex 03France
| | - Philippe Jacquiet
- UMR INRAE/ENVT 1225 IHAP, UMT Santé des Petits RuminantsEcole Nationale Vétérinaire de ToulouseToulouse cedex 03France
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Picciotto S, Santonicola P, Paterna A, Rao E, Raccosta S, Romancino DP, Noto R, Touzet N, Manno M, Di Schiavi E, Bongiovanni A, Adamo G. Extracellular Vesicles From Microalgae: Uptake Studies in Human Cells and Caenorhabditis elegans. Front Bioeng Biotechnol 2022; 10:830189. [PMID: 35402397 PMCID: PMC8987914 DOI: 10.3389/fbioe.2022.830189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 03/08/2022] [Indexed: 11/13/2022] Open
Abstract
Extracellular vesicles (EVs) are lipid membrane nano-sized vesicles secreted by various cell types for intercellular communication, found in all kingdoms of life. Nanoalgosomes are a subtype of EVs derived from microalgae with a sustainable biotechnological potential. To explore the uptake, distribution and persistence of nanoalgosomes in cells and living organisms, we separated them from a culture of the chlorophyte Tetraselmis chuii cells by tangential flow filtration (TFF), labelled them with different lipophilic dyes and characterized their biophysical attributes. Then we studied the cellular uptake of labelled nanoalgosomes in human cells and in C. elegans, demonstrating that they enter the cells through an energy dependent mechanism and are localized in the cytoplasm of specific cells, where they persist for days. Our data confirm that nanoalgosomes are actively uptaken in vitro by human cells and in vivo by C. elegans cells, supporting their exploitation as potential nanocarriers of bioactive compounds for theranostic applications.
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Affiliation(s)
- Sabrina Picciotto
- Cell-Tech HUB and Institute for Research and Biomedical Innovation, National Research Council of Italy (CNR), Palermo, Italy
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, University of Palermo, Palermo, Italy
| | - Pamela Santonicola
- Institute of Biosciences and BioResources (IBBR)—National Research Council of Italy (CNR), Naples, Italy
| | - Angela Paterna
- Cell-Tech HUB and Institute of Biophysics, National Research Council of Italy (CNR), Palermo, Italy
| | - Estella Rao
- Cell-Tech HUB and Institute of Biophysics, National Research Council of Italy (CNR), Palermo, Italy
| | - Samuele Raccosta
- Cell-Tech HUB and Institute of Biophysics, National Research Council of Italy (CNR), Palermo, Italy
| | - Daniele Paolo Romancino
- Cell-Tech HUB and Institute for Research and Biomedical Innovation, National Research Council of Italy (CNR), Palermo, Italy
| | - Rosina Noto
- Cell-Tech HUB and Institute of Biophysics, National Research Council of Italy (CNR), Palermo, Italy
| | - Nicolas Touzet
- Centre for Environmental Research Innovation and Sustainability, Institute of Technology Sligo, Sligo, Ireland
| | - Mauro Manno
- Cell-Tech HUB and Institute of Biophysics, National Research Council of Italy (CNR), Palermo, Italy
| | - Elia Di Schiavi
- Institute of Biosciences and BioResources (IBBR)—National Research Council of Italy (CNR), Naples, Italy
- *Correspondence: Elia Di Schiavi, ; Antonella Bongiovanni, ; Giorgia Adamo,
| | - Antonella Bongiovanni
- Cell-Tech HUB and Institute for Research and Biomedical Innovation, National Research Council of Italy (CNR), Palermo, Italy
- *Correspondence: Elia Di Schiavi, ; Antonella Bongiovanni, ; Giorgia Adamo,
| | - Giorgia Adamo
- Cell-Tech HUB and Institute for Research and Biomedical Innovation, National Research Council of Italy (CNR), Palermo, Italy
- *Correspondence: Elia Di Schiavi, ; Antonella Bongiovanni, ; Giorgia Adamo,
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Renko K, Kerp H, Pape J, Rijntjes E, Burgdorf T, Führer D, Köhrle J. Tentative Application of a Streamlined Protocol to Determine Organ-Specific Regulations of Deiodinase 1 and Dehalogenase Activities as Readouts of the Hypothalamus-Pituitary-Thyroid-Periphery-Axis. Front Toxicol 2022; 4:822993. [PMID: 35387426 PMCID: PMC8978789 DOI: 10.3389/ftox.2022.822993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 02/24/2022] [Indexed: 11/22/2022] Open
Abstract
In animal studies, both in basic science and in toxicological assessment of potential endocrine disruptors, the state of the thyroid hormone (TH) axis is often described and defined exclusively by the concentrations of circulating THs and TSH. Although it is known that the local, organ-specific effects of THs are also substantially regulated by local mechanisms such as TH transmembrane transport and metabolism of TH by deiodinases, such endpoint parameters of the axis are rarely assessed in these experiments. Currently developed in vitro assays utilize the Sandell-Kolthoff reaction, a photometric method of iodide determination, to test the effect of chemicals on iodotyrosine and iodothyronine deiodinases. Furthermore, this technology offers the possibility to determine the iodine content of various sample types (e.g., urine, ex vivo tissue) in a simple way. Here, we measured deiodinase type 1 and iodotyrosine dehalogenase activity by means of the Sandell-Kolthoff reaction in ex vivo samples of hypo- and hyperthyroid mice of two age groups (young; 3 months and old; 20 months). In thyroid, liver and kidney, organ-specific regulation patterns emerged across both age groups, which, based on this pilot study, may serve as a starting point for a deeper characterization of the TH system in relevant studies in the future and support the development of Integrated Approach for Testing and Assessment (IATA).
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Affiliation(s)
- Kostja Renko
- German Federal Institute for Risk Assessment (BfR), German Centre for the Protection of Laboratory Animals (Bf3R), Berlin, Germany
- Charité, Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institut für Experimentelle Endokrinologie, Berlin, Germany
- *Correspondence: Kostja Renko,
| | - Helena Kerp
- Department of Endocrinology, Diabetes and Metabolism, University Hospital Essen, University of Duisburg-Essen, Duisburg, Germany
| | - Janina Pape
- Department of Endocrinology, Diabetes and Metabolism, University Hospital Essen, University of Duisburg-Essen, Duisburg, Germany
| | - Eddy Rijntjes
- Charité, Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institut für Experimentelle Endokrinologie, Berlin, Germany
| | - Tanja Burgdorf
- German Federal Institute for Risk Assessment (BfR), German Centre for the Protection of Laboratory Animals (Bf3R), Berlin, Germany
| | - Dagmar Führer
- Department of Endocrinology, Diabetes and Metabolism, University Hospital Essen, University of Duisburg-Essen, Duisburg, Germany
| | - Josef Köhrle
- Charité, Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institut für Experimentelle Endokrinologie, Berlin, Germany
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Le Maitre CL, Dahia CL, Giers M, Illien‐Junger S, Cicione C, Samartzis D, Vadala G, Fields A, Lotz J. Development of a standardized histopathology scoring system for human intervertebral disc degeneration: an Orthopaedic Research Society Spine Section Initiative. JOR Spine 2021; 4:e1167. [PMID: 34337340 PMCID: PMC8313169 DOI: 10.1002/jsp2.1167] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 05/25/2021] [Accepted: 06/07/2021] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Histopathological analysis of intervertebral disc (IVD) tissues is a critical domain of back pain research. Identification, description, and classification of attributes that distinguish abnormal tissues form a basis for probing disease mechanisms and conceiving novel therapies. Unfortunately, lack of standardized methods and nomenclature can limit comparisons of results across studies and prevent organizing information into a clear representation of the hierarchical, spatial, and temporal patterns of IVD degeneration. Thus, the following Orthopaedic Research Society (ORS) Spine Section Initiative aimed to develop a standardized histopathology scoring scheme for human IVD degeneration. METHODS Guided by a working group of experts, this prospective process entailed a series of stages that consisted of reviewing and assessing past grading schemes, surveying IVD researchers globally on current practice and recommendations for a new grading system, utilizing expert opinion a taxonomy of histological grading was developed, and validation performed. RESULTS A standardized taxonomy was developed, which showed excellent intra-rater reliability for scoring nucleus pulposus (NP), annulus fibrosus (AF), and cartilaginous end plate (CEP) regions (interclass correlation [ICC] > .89). The ability to reliably detect subtle changes varied by IVD region, being poorest in the NP (ICC: .89-.95) where changes at the cellular level were important, vs the AF (ICC: .93-.98), CEP (ICC: .97-.98), and boney end plate (ICC: .96-.99) where matrix and structural changes varied more dramatically with degeneration. CONCLUSIONS The proposed grading system incorporates more comprehensive descriptions of degenerative features for all the IVD sub-tissues than prior criteria. While there was excellent reliability, our results reinforce the need for improved training, particularly for novice raters. Future evaluation of the proposed system in real-world settings (eg, at the microscope) will be needed to further refine criteria and more fully evaluate utility. This improved taxonomy could aid in the understanding of IVD degeneration phenotypes and their association with back pain.
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Affiliation(s)
| | - Chitra L. Dahia
- Orthopaedic Soft Tissue Research ProgramHospital for Special SurgeryNew YorkNew YorkUSA
- Department of Cell and Developmental BiologyWeill Cornell Medicine, Graduate School of Medical SciencesNew YorkNew YorkUSA
| | - Morgan Giers
- School of Chemical, Biological, and Environmental EngineeringOregon State UniversityCorvallisOregonUSA
| | | | - Claudia Cicione
- Laboratory of Regenerative Orthopaedics, Department of Orthopaedic and Trauma SurgeryCampus Bio‐Medico University of RomeRomeItaly
| | - Dino Samartzis
- Department of Orthopaedic SurgeryRush University Medical CenterChicagoIllinoisUSA
- International Spine Research and Innovation InitiativeRush University Medical CenterChicagoIllinoisUSA
| | - Gianluca Vadala
- Laboratory of Regenerative Orthopaedics, Department of Orthopaedic and Trauma SurgeryCampus Bio‐Medico University of RomeRomeItaly
| | - Aaron Fields
- Department of Orthopaedic SurgeryUniversity of California at San FranciscoSan FranciscoCaliforniaUSA
| | - Jeffrey Lotz
- Department of Orthopaedic SurgeryUniversity of California at San FranciscoSan FranciscoCaliforniaUSA
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Poppelaars F, Goicoechea de Jorge E, Jongerius I, Baeumner AJ, Steiner MS, Józsi M, Toonen EJM, Pauly D. A Family Affair: Addressing the Challenges of Factor H and the Related Proteins. Front Immunol 2021; 12:660194. [PMID: 33868311 PMCID: PMC8044877 DOI: 10.3389/fimmu.2021.660194] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 03/08/2021] [Indexed: 12/19/2022] Open
Abstract
Inflammation is a common denominator of diseases. The complement system, an intrinsic part of the innate immune system, is a key driver of inflammation in numerous disorders. Recently, a family of proteins has been suggested to be of vital importance in conditions characterized by complement dysregulation: the human Factor H (FH) family. This group of proteins consists of FH, Factor H-like protein 1 and five Factor H-related proteins. The FH family has been linked to infectious, vascular, eye, kidney and autoimmune diseases. In contrast to FH, the functions of the other highly homologous proteins are largely unknown and, hence, their role in the different disease-specific pathogenic mechanisms remains elusive. In this perspective review, we address the major challenges ahead in this emerging area, including 1) the controversies about the functional roles of the FH protein family, 2) the discrepancies in quantification of the FH protein family, 3) the unmet needs for validated tools and 4) limitations of animal models. Next, we also discuss the opportunities that exist for the immunology community. A strong multidisciplinary approach is required to solve these obstacles and is only possible through interdisciplinary collaboration between biologists, chemists, geneticists and physicians. We position this review in light of our own perspective, as principal investigators of the SciFiMed Consortium, a consortium aiming to create a comprehensive analytical system for the quantitative and functional assessment of the entire FH protein family.
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Affiliation(s)
- Felix Poppelaars
- Department of Internal Medicine, Division of Nephrology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Elena Goicoechea de Jorge
- Department of Immunology, Faculty of Medicine, Complutense University and Research Institute Hospital 12 de Octubre (imas12), Madrid, Spain
| | - Ilse Jongerius
- Department of Immunopathology, Sanquin Research and Landsteiner Laboratory of the Academic Medical Centre, University of Amsterdam, Amsterdam, Netherlands
- Department of Pediatric Immunology, Rheumatology, and Infectious Diseases, Emma Children’s Hospital, Amsterdam University Medical Centre, Amsterdam, Netherlands
| | - Antje J. Baeumner
- Institute of Analytical Chemistry, Chemo-and Biosensors, Faculty of Chemistry and Pharmacy, University of Regensburg, Regensburg, Germany
| | | | - Mihály Józsi
- Department of Immunology, ELTE Eötvös Loránd University, Budapest, Hungary
- MTA-ELTE Complement Research Group, Eötvös Loránd Research Network (ELKH), Department of Immunology, ELTE Eötvös Loránd University, Budapest, Hungary
| | | | - Diana Pauly
- Department of Ophthalmology, University Hospital Regensburg, Regensburg, Germany
- Experimental Ophthalmology, University Marburg, Marburg, Germany
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