1
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Vecchio F, Carré A, Korenkov D, Zhou Z, Apaolaza P, Tuomela S, Burgos-Morales O, Snowhite I, Perez-Hernandez J, Brandao B, Afonso G, Halliez C, Kaddis J, Kent SC, Nakayama M, Richardson SJ, Vinh J, Verdier Y, Laiho J, Scharfmann R, Solimena M, Marinicova Z, Bismuth E, Lucidarme N, Sanchez J, Bustamante C, Gomez P, Buus S, You S, Pugliese A, Hyoty H, Rodriguez-Calvo T, Flodstrom-Tullberg M, Mallone R. Coxsackievirus infection induces direct pancreatic β cell killing but poor antiviral CD8 + T cell responses. Sci Adv 2024; 10:eadl1122. [PMID: 38446892 PMCID: PMC10917340 DOI: 10.1126/sciadv.adl1122] [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] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 01/30/2024] [Indexed: 03/08/2024]
Abstract
Coxsackievirus B (CVB) infection of pancreatic β cells is associated with β cell autoimmunity and type 1 diabetes. We investigated how CVB affects human β cells and anti-CVB T cell responses. β cells were efficiently infected by CVB in vitro, down-regulated human leukocyte antigen (HLA) class I, and presented few, selected HLA-bound viral peptides. Circulating CD8+ T cells from CVB-seropositive individuals recognized a fraction of these peptides; only another subfraction was targeted by effector/memory T cells that expressed exhaustion marker PD-1. T cells recognizing a CVB epitope cross-reacted with β cell antigen GAD. Infected β cells, which formed filopodia to propagate infection, were more efficiently killed by CVB than by CVB-reactive T cells. Our in vitro and ex vivo data highlight limited CD8+ T cell responses to CVB, supporting the rationale for CVB vaccination trials for type 1 diabetes prevention. CD8+ T cells recognizing structural and nonstructural CVB epitopes provide biomarkers to differentially follow response to infection and vaccination.
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Affiliation(s)
- Federica Vecchio
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
| | - Alexia Carré
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
| | - Daniil Korenkov
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
| | - Zhicheng Zhou
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
| | - Paola Apaolaza
- Institute of Diabetes Research, Helmholtz Zentrum München, German Research Center for Environmental Health, Munich-Neuherberg, Germany
- German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany
| | - Soile Tuomela
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | | | - Isaac Snowhite
- Diabetes Research Institute, Leonard Miller School of Medicine, University of Miami, Miami, FL, USA
- Department of Diabetes Immunology, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | | | - Barbara Brandao
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
| | - Georgia Afonso
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
| | - Clémentine Halliez
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
- Assistance Publique Hôpitaux de Paris, Service de Diabétologie et Immunologie Clinique, Cochin Hospital, Paris, France
| | - John Kaddis
- Department of Diabetes Immunology, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope, Duarte, CA, USA
- Department of Diabetes and Cancer Discovery Science, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Sally C. Kent
- Diabetes Center of Excellence, Department of Medicine, University of Massachusetts Medical Chan School, Worcester, MA, USA
| | - Maki Nakayama
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO, USA
| | - Sarah J. Richardson
- Islet Biology Exeter (IBEx), Exeter Centre of Excellence for Diabetes Research (EXCEED), Department of Clinical and Biomedical Sciences, University of Exeter Medical School, Exeter, UK
| | - Joelle Vinh
- ESPCI Paris, PSL University, Spectrométrie de Masse Biologique et Protéomique, CNRS UMR8249, Paris, France
| | - Yann Verdier
- ESPCI Paris, PSL University, Spectrométrie de Masse Biologique et Protéomique, CNRS UMR8249, Paris, France
| | - Jutta Laiho
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | | | - Michele Solimena
- German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany
- Paul Langerhans Institute Dresden (PLID), Helmholtz Munich, University Hospital and Faculty of Medicine, TU Dresden, Dresden, Germany
| | - Zuzana Marinicova
- German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany
- Paul Langerhans Institute Dresden (PLID), Helmholtz Munich, University Hospital and Faculty of Medicine, TU Dresden, Dresden, Germany
| | - Elise Bismuth
- Assistance Publique Hôpitaux de Paris, Service d’Endocrinologie Pédiatrique, Robert Debré Hospital, Paris, France
| | - Nadine Lucidarme
- Assistance Publique Hôpitaux de Paris, Service de Pédiatrie, Jean Verdier Hospital, Bondy, France
| | - Janine Sanchez
- Department of Pediatrics, Division of Pediatric Endocrinology, Leonard Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Carmen Bustamante
- Department of Pediatrics, Division of Pediatric Endocrinology, Leonard Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Patricia Gomez
- Department of Pediatrics, Division of Pediatric Endocrinology, Leonard Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Soren Buus
- Department of Immunology and Microbiology, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - the nPOD-Virus Working Group
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
- Institute of Diabetes Research, Helmholtz Zentrum München, German Research Center for Environmental Health, Munich-Neuherberg, Germany
- German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
- Diabetes Research Institute, Leonard Miller School of Medicine, University of Miami, Miami, FL, USA
- Department of Diabetes Immunology, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope, Duarte, CA, USA
- Assistance Publique Hôpitaux de Paris, Service de Diabétologie et Immunologie Clinique, Cochin Hospital, Paris, France
- Department of Diabetes and Cancer Discovery Science, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope, Duarte, CA, USA
- Diabetes Center of Excellence, Department of Medicine, University of Massachusetts Medical Chan School, Worcester, MA, USA
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO, USA
- Islet Biology Exeter (IBEx), Exeter Centre of Excellence for Diabetes Research (EXCEED), Department of Clinical and Biomedical Sciences, University of Exeter Medical School, Exeter, UK
- ESPCI Paris, PSL University, Spectrométrie de Masse Biologique et Protéomique, CNRS UMR8249, Paris, France
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
- Paul Langerhans Institute Dresden (PLID), Helmholtz Munich, University Hospital and Faculty of Medicine, TU Dresden, Dresden, Germany
- Assistance Publique Hôpitaux de Paris, Service d’Endocrinologie Pédiatrique, Robert Debré Hospital, Paris, France
- Assistance Publique Hôpitaux de Paris, Service de Pédiatrie, Jean Verdier Hospital, Bondy, France
- Department of Pediatrics, Division of Pediatric Endocrinology, Leonard Miller School of Medicine, University of Miami, Miami, FL, USA
- Department of Immunology and Microbiology, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
- Indiana Biosciences Research Institute, Indianapolis, IN, USA
- Fimlab Laboratories, Tampere, Finland
- Department of Pediatrics, Tampere University Hospital, Tampere, Finland
| | - Sylvaine You
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
- Indiana Biosciences Research Institute, Indianapolis, IN, USA
| | - Alberto Pugliese
- Diabetes Research Institute, Leonard Miller School of Medicine, University of Miami, Miami, FL, USA
- Department of Diabetes Immunology, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Heikki Hyoty
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
- Fimlab Laboratories, Tampere, Finland
- Department of Pediatrics, Tampere University Hospital, Tampere, Finland
| | - Teresa Rodriguez-Calvo
- Institute of Diabetes Research, Helmholtz Zentrum München, German Research Center for Environmental Health, Munich-Neuherberg, Germany
- German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany
| | - Malin Flodstrom-Tullberg
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Roberto Mallone
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
- Assistance Publique Hôpitaux de Paris, Service de Diabétologie et Immunologie Clinique, Cochin Hospital, Paris, France
- Indiana Biosciences Research Institute, Indianapolis, IN, USA
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2
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Vecchio F, Carré A, Korenkov D, Zhou Z, Apaolaza P, Tuomela S, Burgos-Morales O, Snowhite I, Perez-Hernandez J, Brandao B, Afonso G, Halliez C, Kaddis J, Kent SC, Nakayama M, Richardson SJ, Vinh J, Verdier Y, Laiho J, Scharfmann R, Solimena M, Marinicova Z, Bismuth E, Lucidarme N, Sanchez J, Bustamante C, Gomez P, Buus S, You S, Pugliese A, Hyoty H, Rodriguez-Calvo T, Flodstrom-Tullberg M, Mallone R. Coxsackievirus infection induces direct pancreatic β-cell killing but poor anti-viral CD8+ T-cell responses. bioRxiv 2023:2023.08.19.553954. [PMID: 37662376 PMCID: PMC10473604 DOI: 10.1101/2023.08.19.553954] [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] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
Coxsackievirus B (CVB) infection of pancreatic β cells is associated with β-cell autoimmunity. We investigated how CVB impacts human β cells and anti-CVB T-cell responses. β cells were efficiently infected by CVB in vitro, downregulated HLA Class I and presented few, selected HLA-bound viral peptides. Circulating CD8+ T cells from CVB-seropositive individuals recognized only a fraction of these peptides, and only another sub-fraction was targeted by effector/memory T cells that expressed the exhaustion marker PD-1. T cells recognizing a CVB epitope cross-reacted with the β-cell antigen GAD. Infected β cells, which formed filopodia to propagate infection, were more efficiently killed by CVB than by CVB-reactive T cells. Thus, our in-vitro and ex-vivo data highlight limited T-cell responses to CVB, supporting the rationale for CVB vaccination trials for type 1 diabetes prevention. CD8+ T cells recognizing structural and non-structural CVB epitopes provide biomarkers to differentially follow response to infection and vaccination.
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Affiliation(s)
- Federica Vecchio
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
| | - Alexia Carré
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
| | - Daniil Korenkov
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
| | - Zhicheng Zhou
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
| | - Paola Apaolaza
- Institute of Diabetes Research, Helmholtz Zentrum München, German Research Center for Environmental Health, Munich-Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Soile Tuomela
- Center for Infectious Medicine, Department of medicine Huddinge, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | | | - Isaac Snowhite
- Diabetes Research Institute, Leonard Miller School of Medicine, University of Miami, FL, USA
- Department of Diabetes Immunology, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | | | - Barbara Brandao
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
| | - Georgia Afonso
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
| | | | - John Kaddis
- Department of Diabetes Immunology, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope, Duarte, CA, USA
- Department of Diabetes and Cancer Discovery Science, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Sally C. Kent
- University of Massachusetts Medical Chan School, Diabetes Center of Excellence, Department of Medicine, Worcester, MA, USA
| | - Maki Nakayama
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO, USA
| | - Sarah J. Richardson
- Islet Biology Exeter (IBEx), Exeter Centre of Excellence for Diabetes Research (EXCEED), Department of Clinical and Biomedical Sciences, University of Exeter Medical School, Exeter, UK
| | - Joelle Vinh
- ESPCI Paris, PSL University, Spectrométrie de Masse Biologique et Protéomique, CNRS UMR8249, Paris, France
| | - Yann Verdier
- ESPCI Paris, PSL University, Spectrométrie de Masse Biologique et Protéomique, CNRS UMR8249, Paris, France
| | - Jutta Laiho
- Tampere University, Faculty of Medicine and Health Technology and Fimlab Laboratories, Tampere, Finland
| | | | - Michele Solimena
- Paul Langerhans Institute, Technical University Dresden, Germany
| | | | - Elise Bismuth
- Assistance Publique Hôpitaux de Paris, Service d’Endocrinologie Pédiatrique, Robert Debré Hospital, Paris, France
| | - Nadine Lucidarme
- Assistance Publique Hôpitaux de Paris, Service de Pédiatrie, Jean Verdier Hospital, Bondy, France
| | - Janine Sanchez
- Department of Pediatrics, Division of pediatric Endocrinology, Leonard Miller School of Medicine, University of Miami, FL, USA
| | - Carmen Bustamante
- Department of Pediatrics, Division of pediatric Endocrinology, Leonard Miller School of Medicine, University of Miami, FL, USA
| | - Patricia Gomez
- Department of Pediatrics, Division of pediatric Endocrinology, Leonard Miller School of Medicine, University of Miami, FL, USA
| | - Soren Buus
- Panum Institute, Department of International Health, Immunology and Microbiology, Copenhagen, Denmark
| | | | - Sylvaine You
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
- Indiana Biosciences Research Institute, Indianapolis, IN, USA
| | - Alberto Pugliese
- Diabetes Research Institute, Leonard Miller School of Medicine, University of Miami, FL, USA
- Department of Diabetes Immunology, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Heikki Hyoty
- Tampere University, Faculty of Medicine and Health Technology and Fimlab Laboratories, Tampere, Finland
| | - Teresa Rodriguez-Calvo
- Institute of Diabetes Research, Helmholtz Zentrum München, German Research Center for Environmental Health, Munich-Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Malin Flodstrom-Tullberg
- Center for Infectious Medicine, Department of medicine Huddinge, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Roberto Mallone
- Université Paris Cité, Institut Cochin, CNRS, INSERM, Paris, France
- Indiana Biosciences Research Institute, Indianapolis, IN, USA
- Assistance Publique Hôpitaux de Paris, Service de Diabétologie et Immunologie Clinique, Cochin Hospital, Paris, France
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3
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Jacobsen LM, Haller MJ, Parish A, Gurka MJ, Levine SR, Wasserfall C, Campbell-Thompson M, Kaddis J, Pugliese A, Atkinson MA, Schatz DA. High Illicit Drug Abuse and Suicide in Organ Donors With Type 1 Diabetes. Diabetes Care 2017; 40:e122-e123. [PMID: 28679687 DOI: 10.2337/dc17-0996] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 06/13/2017] [Indexed: 02/03/2023]
Affiliation(s)
- Laura M Jacobsen
- Department of Pediatrics, University of Florida, Gainesville, FL.,Diabetes Institute, University of Florida, Gainesville, FL
| | - Michael J Haller
- Department of Pediatrics, University of Florida, Gainesville, FL.,Diabetes Institute, University of Florida, Gainesville, FL
| | - Alice Parish
- Department of Health Outcomes and Policy, University of Florida, Gainesville, FL
| | - Matthew J Gurka
- Department of Health Outcomes and Policy, University of Florida, Gainesville, FL
| | - S Robert Levine
- Department of Pediatrics, University of Florida, Gainesville, FL
| | - Clive Wasserfall
- Diabetes Institute, University of Florida, Gainesville, FL.,Department of Pathology, University of Florida, Gainesville, FL
| | - Martha Campbell-Thompson
- Diabetes Institute, University of Florida, Gainesville, FL.,Department of Pathology, University of Florida, Gainesville, FL
| | - John Kaddis
- Department of Information Sciences, City of Hope National Medical Center, Duarte, CA
| | | | - Mark A Atkinson
- Department of Pediatrics, University of Florida, Gainesville, FL.,Diabetes Institute, University of Florida, Gainesville, FL.,Department of Pathology, University of Florida, Gainesville, FL
| | - Desmond A Schatz
- Department of Pediatrics, University of Florida, Gainesville, FL .,Diabetes Institute, University of Florida, Gainesville, FL
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4
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Babon JAB, DeNicola ME, Blodgett DM, Crèvecoeur I, Buttrick TS, Maehr R, Bottino R, Naji A, Kaddis J, Elyaman W, James EA, Haliyur R, Brissova M, Overbergh L, Mathieu C, Delong T, Haskins K, Pugliese A, Campbell-Thompson M, Mathews C, Atkinson MA, Powers AC, Harlan DM, Kent SC. Corrigendum: Analysis of self-antigen specificity of islet-infiltrating T cells from human donors with type 1 diabetes. Nat Med 2017; 23:264. [PMID: 28170374 DOI: 10.1038/nm0217-264a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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5
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Campbell-Thompson M, Wasserfall C, Kaddis J, Albanese-O'Neill A, Staeva T, Nierras C, Moraski J, Rowe P, Gianani R, Eisenbarth G, Crawford J, Schatz D, Pugliese A, Atkinson M. Network for Pancreatic Organ Donors with Diabetes (nPOD): developing a tissue biobank for type 1 diabetes. Diabetes Metab Res Rev 2012; 28:608-17. [PMID: 22585677 PMCID: PMC3456997 DOI: 10.1002/dmrr.2316] [Citation(s) in RCA: 147] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND The Network for Pancreatic Organ Donors with Diabetes (nPOD) was established to recover and characterize pancreata and related organs from cadaveric organ donors with various risk levels for type 1 diabetes (T1D). These biospecimens are available to investigators for collaborative studies aimed at addressing questions related to T1D natural history and pathogenesis. RESEARCH DESIGN AND METHODS Organ donors included T1D patients (new onset to long term), non-diabetic autoantibody-positive subjects, non-diabetic controls and individuals with disorders relevant to β-cell function. Pancreas recovery and transport met transplant-grade criteria. Additional samples recovered included serum, whole blood, spleen and pancreatic and non-pancreatic lymph nodes. Biospecimens were processed for cryopreserved cells, fixed paraffin and fresh frozen blocks and snap frozen samples. T1D autoantibodies, C-peptide levels and high-resolution HLA genotyping for risk alleles were also determined. RESULTS Over 160 donors have been enrolled (ages of 1 day to >90 years). Standard operating procedures were established along with a quality management system. Donor demographics, laboratory assays and histopathological characterizations were shared through an open online informatics system. Biospecimens were distributed to more than 60 investigators. CONCLUSIONS The nPOD programme provides access to high quality biospecimens without cost to investigators. Collaborations and open data sharing are emphasized to maximize research potential of each donor. On the basis of initial successes, the nPOD programme is expanding to recover additional organs relevant to T1D pathogenesis and complications from European countries (PanFin network).
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Affiliation(s)
- Martha Campbell-Thompson
- Department of Pathology, Immunology and Laboratory Medicine, College of Medicine, University of Florida, Gainesville, FL 32610-0275, USA.
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6
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Abstract
In recent years, industries have turned to the field of operations research to help improve the efficiency of production and distribution processes. Largely absent is the application of this methodology to biological materials, such as the complex and costly procedure of human pancreas procurement and islet isolation. Pancreatic islets are used for basic science research and in a promising form of cell replacement therapy for a subset of patients afflicted with severe type 1 diabetes mellitus. Having an accurate and reliable system for cell distribution is therefore crucial. The Islet Cell Resource Center Consortium was formed in 2001 as the first and largest cooperative group of islet production and distribution facilities in the world. We previously reported on the development of a Matching Algorithm for Islet Distribution (MAID), an automated web-based tool used to optimize the distribution of human pancreatic islets by matching investigator requests to islet characteristics. This article presents an assessment of that algorithm and compares it to the manual distribution process used prior to MAID. A comparison was done using an investigator's ratio of the number of islets received divided by the number requested pre- and post-MAID. Although the supply of islets increased between the pre- versus post-MAID period, the median received-to-requested ratio remained around 60% due to an increase in demand post-MAID. A significantly smaller variation in the received-to-requested ratio was achieved in the post- versus pre-MAID period. In particular, the undesirable outcome of providing users with more islets than requested, ranging up to four times their request, was greatly reduced through the algorithm. In conclusion, this analysis demonstrates, for the first time, the effectiveness of using an automated web-based cell distribution system to facilitate efficient and consistent delivery of human pancreatic islets by enhancing the islet matching process.
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Affiliation(s)
- Joyce C Niland
- Department of Information Sciences, City of Hope National Medical Center, Duarte, CA 91010-3000, USA.
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7
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Abstract
The success of human pancreatic islet transplantation in a subset of type 1 diabetic patients has led to an increased demand for this tissue in both clinical and basic research, yet the availability of such preparations is limited and the quality highly variable. Under the current process of islet distribution for basic science experimentation nationwide, specialized laboratories attempt to distribute islets to one or more scientists based on a list of known investigators. This Local Decision Making (LDM) process has been found to be ineffective and suboptimal. To alleviate these problems, a computerized Matching Algorithm for Islet Distribution (MAID) was developed to better match the functional, morphological, and quality characteristics of islet preparations to the criteria desired by basic research laboratories, i.e. requesters. The algorithm searches for an optimal combination of requesters using detailed screening, sorting, and search procedures. When applied to a data set of 68 human islet preparations distributed by the Islet Cell Resource (ICR) Center Consortium, MAID reduced the number of requesters that a) did not receive any islets, and b) received mis-matched shipments. These results suggest that MAID is an improved more efficient approach to the centralized distribution of human islets within a consortium setting.
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Affiliation(s)
- Dajun Qian
- Division of Information Sciences and Administrative and Bioinformatics Coordinating Center for the Islet Cell Resource Center Consortium, City of Hope National Medical Center, Duarte, California, USA
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8
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Kaddis J, Zurita C, Moran J, Borra M, Polder N, Meyer CR, Gomez FA. Estimation of binding constants for the substrate and activator of Rhodobacter sphaeroides adenosine 5'-diphosphate-glucose pyrophosphorylase using affinity capillary electrophoresis. Anal Biochem 2004; 327:252-60. [PMID: 15051543 DOI: 10.1016/j.ab.2004.01.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [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: 11/18/2003] [Indexed: 11/22/2022]
Abstract
Binding constants were determined for the activator fructose-6-phosphate (F6P) and substrate adenosine 5'-triphosphate (ATP) (in the presence and absence of F6P) to the recombinant wild-type (WT) Rhodobacter sphaeroides adenosine 5'-diphosphate-(ADP)-glucose pyrophosphorylase (ADPGlc PPase) using affinity capillary electrophoresis (ACE). In these binding studies, the capillary is initially injected with a plug of sample containing ADPGlc PPase and noninteracting standards. The sample is then subjected to increasing concentrations of F6P or ATP in the running buffer and electrophoresed. Analysis of the change in the migration times of ADPGlc PPase, relative to those of the noninteracting standards, as a function of the varying concentration of F6P or ATP yields a binding constant. The values obtained were in good agreement with kinetic parameters obtained from steady state activity assays. The method was extended to examine the F6P binding constants for the R33A and R22A enzymes and the ATP binding constants for the R8A enzyme in the presence and absence of F6P. The R33A enzyme has been shown by activity assays to be insensitive to F6P activation, indicating a defect in binding or in downstream transmission of the allosteric signal required for full activation. ACE indicated no apparent binding of F6P, supporting the former hypothesis. The R22A enzyme was shown by activity assays to have a approximately 15-fold decrease in apparent affinity for F6P compared to that of WT while ACE indicated an affinity comparable to that of WT; potential reasons for this discrepancy are discussed. The R8A enzyme as measured by activity assays exhibits reduced fold-activation by F6P compared to that of WT but increased apparent affinity for ATP in the presence of F6P. The ACE results were in good agreement with the activity assay data, confirming the increased affinity for ATP in the presence of F6P. This method demonstrates the quantitative ability of ACE to study different binding sites/ligand interactions in allosteric enzymes.
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Affiliation(s)
- John Kaddis
- Department of Chemistry and Biochemistry, California State University at Los Angeles, 5151 State University Drive, Los Angeles, CA 90032-8202, USA
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9
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Abstract
Afffinity capillary electrophoresis (ACE) is a new analytical technique that has been shown to be an efficient and accurate tool in studying biomolecular noncovalent interactions and determining binding and dissociation constants of formed complexes. ACE uses as its basis the change in migration time of a receptor upon binding to a ligand found in the electrophoresis buffer. Subsequent Scatchard analysis using noninteracting markers realizes a binding constant. Herein, ACE and three modifications in the technique, partial-filling ACE (PFACE), flow through PFACE (FTPFACE), and multiple-step ligand injection ACE (MSLIACE) are used to probe the binding of ristocetin A (Rist A) and vancomycin (Van) from Streptomyces orientalis to D-Ala-D-Ala terminus peptides and carbonic anhydrase B (CAB, E.C.4.2.1.1) to arylsulfonamides.
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Affiliation(s)
- Maryam Azad
- Department of Chemistry and Biochemistry, California State University, Los Angeles, CA., USA
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10
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Villareal V, Kaddis J, Azad M, Zurita C, Silva I, Hernandez L, Rudolph M, Moran J, Gomez FA. Partial-filling affinity capillary electrophoresis. Anal Bioanal Chem 2003; 376:822-31. [PMID: 12830361 DOI: 10.1007/s00216-003-1999-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [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: 01/21/2003] [Revised: 03/17/2003] [Accepted: 04/22/2003] [Indexed: 10/26/2022]
Abstract
Partial-filling affinity capillary electrophoresis (PFACE) is used to examine the binding interactions between two model biological systems: D-Ala-D-Ala terminus peptides to the glycopeptide antibiotic vancomycin (Van) from Streptomyces orientalis, and arylsulfonamides to carbonic anhydrase B (CAB, EC 4.2.1.1, bovine erythrocytes). Using these two systems, modifications in the PFACE technique are demonstrated including flow-through PFACE (FTPFACE), competitive flow-through PFACE (CFTPFACE), on-column ligand synthesis PFACE (OCLSPFACE), and multiple-step ligand injection PFACE (MSLIPFACE). In PFACE small plugs of sample are injected into the capillary column and an equilibrium is established between receptor and ligand during electrophoresis. Binding constants are then obtained by Scatchard analysis using changes in the migration time of the receptor/ligand on changing the concentration of the ligand/receptor. Data demonstrating the quantitative potential of these methods are presented. This review focuses on the unique capabilities of the different PFACE techniques as applied to two model biological systems.
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Affiliation(s)
- Valerie Villareal
- Department of Chemistry and Biochemistry, California State University, Los Angeles, 5151 State University Drive, Los Angeles, CA 90032-8202, USA
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Kaddis J, Mito E, Heintz J, Plazas A, Gomez FA. Flow-through partial-filling affinity capillary electrophoresis can estimate binding constants of neutral ligands to receptors via a competitive assay technique. Electrophoresis 2003; 24:1105-10. [PMID: 12658702 DOI: 10.1002/elps.200390129] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [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] [Indexed: 11/08/2022]
Abstract
This work evaluates the use of a competitive binding assay using flow-through partial-filling affinity capillary electrophoresis (FTPFACE) to estimate binding constants of neutral ligands to a receptor. We demonstrate this technique using, as a model system, carbonic anhydrase B (CAB, EC 4.2.1.1) and arylsulfonamides. In this technique, the capillary is first partially filled with a negatively charged ligand, a sample containing CAB and two noninteracting standards, and a neutral ligand, then electrophoresed. Upon application of a voltage the sample plug migrates into the plug of negatively charged ligand (L(-)) resulting in the formation of a CAB-L(-) complex. Continued electrophoresis results in mixing between the neutral ligand (L(0)) and the CAB-L(-) complex. L(0) successfully competes out L(-) to form the new CAB-L(0) complex. Analysis of the change in the relative migration time ratio (RMTR) of CAB relative to the noninteracting standards, as a function of neutral ligand concentration, yields a value for the binding constant. These values are in agreement with those estimated using other binding and ACE techniques. Data demonstrating the quantitative potential of this method is presented.
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Affiliation(s)
- John Kaddis
- Department of Chemistry and Biochemistry, California State University, Los Angeles, CA 90032-8202, USA.
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Zhang Y, Kaddis J, Silverio C, Zurita C, Gomez FA. On-column enzyme-catalyzed microreactions using capillary electrophoresis: quantitative studies. J Capill Electrophor Microchip Technol 2002; 7:1-9. [PMID: 11936761] [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] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Capillary electrophoresis and on-column enzyme-catalyzed microreactor techniques were used to quantitate the reaction projects resulting from three model systems: i) the conversion of nicotinamide adenine dinucleotide (NAD) to nicotinamide adenine dinucleotide, reduced form (NADH) in the oxidation of glucose-6-phosphate (glc-6-p) to 6-phosphogluconate by glucose-6-phosphate dehydrogenase (G6PDH, EC 1.1.1.49); ii) the conversion of adenosine triphosphate (ATP) to adenosine diphosphate (ADP) and adenosine monophosphate (AMP) by hexokinase (HK, EC 2.7.1.1) and apyrase (APY, EC 3.6.1.5), respectively, in the conversion of glucose to glucose-6-phosphate and inorganic phosphate, respectively, and; iii) the conversion of fructose-1,6-bisphosphate to dihydroxyacetone phosphate and glyceraldehyde-3-phosphate by fructose-biphosphate aldolase (ALD, EC 4.1.2.13). Single and double microreactor techniques employing direct or indirect detection were used to follow the conversion of substrate to product(s). In addition, electrophoresis conditions including voltage, enzyme concentration, and mixing time of the reaction, were correlated to product distribution profiles.
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Affiliation(s)
- Ying Zhang
- Department of Chemistry and Biochemistry, California State University, Los Angeles 90032-8202, USA.
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