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Simon NM, Kim Y, Bautista DM, Dutton JR, Brem RB. Stem cell transcriptional profiles from mouse subspecies reveal cis-regulatory evolution at translation genes. Heredity (Edinb) 2024:10.1038/s41437-024-00715-z. [PMID: 39164520 DOI: 10.1038/s41437-024-00715-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 08/06/2024] [Accepted: 08/08/2024] [Indexed: 08/22/2024] Open
Abstract
A key goal of evolutionary genomics is to harness molecular data to draw inferences about selective forces that have acted on genomes. The field progresses in large part through the development of advanced molecular-evolution analysis methods. Here we explored the intersection between classical sequence-based tests for selection and an empirical expression-based approach, using stem cells from Mus musculus subspecies as a model. Using a test of directional, cis-regulatory evolution across genes in pathways, we discovered a unique program of induction of translation genes in stem cells of the Southeast Asian mouse M. m. castaneus relative to its sister taxa. We then mined population-genomic sequences to pursue underlying regulatory mechanisms for this expression divergence, finding robust evidence for alleles unique to M. m. castaneus at the upstream regions of the translation genes. We interpret our data under a model of changes in lineage-specific pressures across Mus musculus in stem cells with high translational capacity. Our findings underscore the rigor of integrating expression and sequence-based methods to generate hypotheses about evolutionary events from long ago.
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Affiliation(s)
- Noah M Simon
- Biology of Aging Doctoral Program, Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, 90089, USA
- Buck Institute for Research on Aging, Novato, CA, 94945, USA
- Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, CA, 94720, USA
| | - Yujin Kim
- Stem Cell Institute, University of Minnesota, Minneapolis, MN, 55455, USA
- Department of Genetics, Cell Biology, and Development, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Diana M Bautista
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA, 94720, USA
| | - James R Dutton
- Stem Cell Institute, University of Minnesota, Minneapolis, MN, 55455, USA
- Department of Genetics, Cell Biology, and Development, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Rachel B Brem
- Buck Institute for Research on Aging, Novato, CA, 94945, USA.
- Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, CA, 94720, USA.
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2
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Ibrahim H, Balboa D, Saarimäki-Vire J, Montaser H, Dyachok O, Lund PE, Omar-Hmeadi M, Kvist J, Dwivedi OP, Lithovius V, Barsby T, Chandra V, Eurola S, Ustinov J, Tuomi T, Miettinen PJ, Barg S, Tengholm A, Otonkoski T. RFX6 haploinsufficiency predisposes to diabetes through impaired beta cell function. Diabetologia 2024; 67:1642-1662. [PMID: 38743124 PMCID: PMC11343796 DOI: 10.1007/s00125-024-06163-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 03/21/2024] [Indexed: 05/16/2024]
Abstract
AIMS/HYPOTHESIS Regulatory factor X 6 (RFX6) is crucial for pancreatic endocrine development and differentiation. The RFX6 variant p.His293LeufsTer7 is significantly enriched in the Finnish population, with almost 1:250 individuals as a carrier. Importantly, the FinnGen study indicates a high predisposition for heterozygous carriers to develop type 2 and gestational diabetes. However, the precise mechanism of this predisposition remains unknown. METHODS To understand the role of this variant in beta cell development and function, we used CRISPR technology to generate allelic series of pluripotent stem cells. We created two isogenic stem cell models: a human embryonic stem cell model; and a patient-derived stem cell model. Both were differentiated into pancreatic islet lineages (stem-cell-derived islets, SC-islets), followed by implantation in immunocompromised NOD-SCID-Gamma mice. RESULTS Stem cell models of the homozygous variant RFX6-/- predictably failed to generate insulin-secreting pancreatic beta cells, mirroring the phenotype observed in Mitchell-Riley syndrome. Notably, at the pancreatic endocrine stage, there was an upregulation of precursor markers NEUROG3 and SOX9, accompanied by increased apoptosis. Intriguingly, heterozygous RFX6+/- SC-islets exhibited RFX6 haploinsufficiency (54.2% reduction in protein expression), associated with reduced beta cell maturation markers, altered calcium signalling and impaired insulin secretion (62% and 54% reduction in basal and high glucose conditions, respectively). However, RFX6 haploinsufficiency did not have an impact on beta cell number or insulin content. The reduced insulin secretion persisted after in vivo implantation in mice, aligning with the increased risk of variant carriers to develop diabetes. CONCLUSIONS/INTERPRETATION Our allelic series isogenic SC-islet models represent a powerful tool to elucidate specific aetiologies of diabetes in humans, enabling the sensitive detection of aberrations in both beta cell development and function. We highlight the critical role of RFX6 in augmenting and maintaining the pancreatic progenitor pool, with an endocrine roadblock and increased cell death upon its loss. We demonstrate that RFX6 haploinsufficiency does not affect beta cell number or insulin content but does impair function, predisposing heterozygous carriers of loss-of-function variants to diabetes. DATA AVAILABILITY Ultra-deep bulk RNA-seq data for pancreatic differentiation stages 3, 5 and 7 of H1 RFX6 genotypes are deposited in the Gene Expression Omnibus database with accession code GSE234289. Original western blot images are deposited at Mendeley ( https://data.mendeley.com/datasets/g75drr3mgw/2 ).
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Affiliation(s)
- Hazem Ibrahim
- Stem Cells and Metabolism Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland.
| | - Diego Balboa
- Stem Cells and Metabolism Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Jonna Saarimäki-Vire
- Stem Cells and Metabolism Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Hossam Montaser
- Stem Cells and Metabolism Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Oleg Dyachok
- Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden
| | - Per-Eric Lund
- Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden
| | | | - Jouni Kvist
- Stem Cells and Metabolism Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Om P Dwivedi
- Institute for Molecular Medicine Finland, FIMM, HiLIFE, Helsinki, Finland
- Research Program of Clinical and Molecular Metabolism, University of Helsinki, Helsinki, Finland
| | - Väinö Lithovius
- Stem Cells and Metabolism Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Tom Barsby
- Stem Cells and Metabolism Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Vikash Chandra
- Stem Cells and Metabolism Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Solja Eurola
- Stem Cells and Metabolism Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Jarkko Ustinov
- Stem Cells and Metabolism Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Tiinamaija Tuomi
- Institute for Molecular Medicine Finland, FIMM, HiLIFE, Helsinki, Finland
- Research Program of Clinical and Molecular Metabolism, University of Helsinki, Helsinki, Finland
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Biomedicum Helsinki, Finland
- Abdominal Center, Endocrinology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Lund University Diabetes Centre, Department of Clinical Sciences, Lund University, Lund, Sweden
| | - Päivi J Miettinen
- Department of Pediatrics, Helsinki University Hospital, Helsinki, Finland
| | - Sebastian Barg
- Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden
| | - Anders Tengholm
- Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden
| | - Timo Otonkoski
- Stem Cells and Metabolism Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland.
- Department of Pediatrics, Helsinki University Hospital, Helsinki, Finland.
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3
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Sanchez JG, Rankin S, Paul E, McCauley HA, Kechele DO, Enriquez JR, Jones NH, Greeley SAW, Letourneau-Friedberg L, Zorn AM, Krishnamurthy M, Wells JM. RFX6 regulates human intestinal patterning and function upstream of PDX1. Development 2024; 151:dev202529. [PMID: 38587174 PMCID: PMC11128285 DOI: 10.1242/dev.202529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 03/12/2024] [Indexed: 04/09/2024]
Abstract
The gastrointestinal (GI) tract is complex and consists of multiple organs with unique functions. Rare gene variants can cause congenital malformations of the human GI tract, although the molecular basis of these has been poorly studied. We identified a patient with compound-heterozygous variants in RFX6 presenting with duodenal malrotation and atresia, implicating RFX6 in development of the proximal intestine. To identify how mutations in RFX6 impact intestinal patterning and function, we derived induced pluripotent stem cells from this patient to generate human intestinal organoids (HIOs). We identified that the duodenal HIOs and human tissues had mixed regional identity, with gastric and ileal features. CRISPR-mediated correction of RFX6 restored duodenal identity. We then used gain- and loss-of-function and transcriptomic approaches in HIOs and Xenopus embryos to identify that PDX1 is a downstream transcriptional target of RFX6 required for duodenal development. However, RFX6 had additional PDX1-independent transcriptional targets involving multiple components of signaling pathways that are required for establishing early regional identity in the GI tract. In summary, we have identified RFX6 as a key regulator in intestinal patterning that acts by regulating transcriptional and signaling pathways.
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Affiliation(s)
- J. Guillermo Sanchez
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati OH 45229, USA
- Center for Stem Cell and Organoid Medicine (CuSTOM), Cincinnati Children's Hospital Medical Center, Cincinnati OH 45229, USA
| | - Scott Rankin
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati OH 45229, USA
- Center for Stem Cell and Organoid Medicine (CuSTOM), Cincinnati Children's Hospital Medical Center, Cincinnati OH 45229, USA
| | - Emily Paul
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati OH 45229, USA
- Center for Stem Cell and Organoid Medicine (CuSTOM), Cincinnati Children's Hospital Medical Center, Cincinnati OH 45229, USA
| | - Heather A. McCauley
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati OH 45229, USA
- Center for Stem Cell and Organoid Medicine (CuSTOM), Cincinnati Children's Hospital Medical Center, Cincinnati OH 45229, USA
- Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC 27599, USA
| | - Daniel O. Kechele
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati OH 45229, USA
- Center for Stem Cell and Organoid Medicine (CuSTOM), Cincinnati Children's Hospital Medical Center, Cincinnati OH 45229, USA
| | - Jacob R. Enriquez
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati OH 45229, USA
- Center for Stem Cell and Organoid Medicine (CuSTOM), Cincinnati Children's Hospital Medical Center, Cincinnati OH 45229, USA
| | - Nana-Hawa Jones
- Division of Endocrinology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Siri A. W. Greeley
- Division of Endocrinology, University of Chicago, Chicago, IL 60637, USA
| | | | - Aaron M. Zorn
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati OH 45229, USA
- Center for Stem Cell and Organoid Medicine (CuSTOM), Cincinnati Children's Hospital Medical Center, Cincinnati OH 45229, USA
| | - Mansa Krishnamurthy
- Division of Endocrinology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - James M. Wells
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati OH 45229, USA
- Center for Stem Cell and Organoid Medicine (CuSTOM), Cincinnati Children's Hospital Medical Center, Cincinnati OH 45229, USA
- Division of Endocrinology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
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4
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Nakamura T, Fujikura J, Ito R, Keidai Y, Inagaki N. Human RFX6 regulates endoderm patterning at the primitive gut tube stage. PNAS NEXUS 2024; 3:pgae001. [PMID: 38239755 PMCID: PMC10794167 DOI: 10.1093/pnasnexus/pgae001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 12/26/2023] [Indexed: 01/22/2024]
Abstract
Transcriptional factor RFX6 is known to be a causal gene of Mitchell-Riley syndrome (MRS), an autosomal recessive neonatal diabetes associated with pancreatic hypoplasia and intestinal atresia/malformation. The morphological defects are limited to posterior foregut and mid-hindgut endodermal lineages and do not occur in the anterior foregut lineage; the mechanism remains to be fully elucidated. In this study, we generated RFX6+/eGFP heterozygous knockin and RFX6eGFP/eGFP homozygous knockin/knockout human-induced pluripotent stem cell (hiPSC) lines and performed in vitro endoderm differentiation to clarify the role of RFX6 in early endoderm development. RFX6 expression was found to surge at the primitive gut tube (PGT) stage in comparison with that in the undifferentiated or definitive endoderm stage. At the PGT stage, the expression of PDX1 and CDX2, posterior foregut and mid-hindgut master regulators, respectively, was decreased by the RFX6 deficit. PDX1+ and CDX2+ cells were mostly green fluorescent protein (GFP)+ in RFX6+/eGFP hiPSCs, but their cell number was markedly decreased in RFX6eGFP/eGFP hiPSCs. The expression of SOX2, an anterior foregut marker, was not affected by the RFX6 deficit. In addition, we found a putative RFX6-binding X-box motif using cap analysis of gene expression-seq and the motif-containing sequences in the enhancer regions of PDX1 and CDX2 bound to RFX6 in vitro. Thus, RFX6 regulates the ParaHox genes PDX1 and CDX2 but does not affect SOX2 in early endodermal differentiation, suggesting that defects in early stage endoderm patterning account for the morphological pathology of MRS.
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Affiliation(s)
- Toshihiro Nakamura
- Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Junji Fujikura
- Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Ryo Ito
- Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
- Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Yamato Keidai
- Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Nobuya Inagaki
- Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
- Medical Research Institute, Kitano Hospital, PIIF Tazuke-kofukai, Osaka 530-8480, Japan
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5
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Chilunga FP, Meeks KAC, Henneman P, Agyemang C, Doumatey AP, Rotimi CN, Adeyemo AA. An epigenome-wide association study of insulin resistance in African Americans. Clin Epigenetics 2022; 14:88. [PMID: 35836279 PMCID: PMC9281172 DOI: 10.1186/s13148-022-01309-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 07/04/2022] [Indexed: 11/18/2022] Open
Abstract
Background African Americans have a high risk for type 2 diabetes (T2D) and insulin resistance. Studies among other population groups have identified DNA methylation loci associated with insulin resistance, but data in African Americans are lacking. Using DNA methylation profiles of blood samples obtained from the Illumina Infinium® HumanMethylation450 BeadChip, we performed an epigenome-wide association study to identify DNA methylation loci associated with insulin resistance among 136 non-diabetic, unrelated African American men (mean age 41.6 years) from the Howard University Family Study. Results We identified three differentially methylated positions (DMPs) for homeostatic model assessment of insulin resistance (HOMA-IR) at 5% FDR. One DMP (cg14013695, HOXA5) is a known locus among Mexican Americans, while the other two DMPs are novel—cg00456326 (OSR1; beta = 0.027) and cg20259981 (ST18; beta = 0.010). Although the cg00456326 DMP is novel, the OSR1 gene has previously been found associated with both insulin resistance and T2D in Europeans. The genes HOXA5 and ST18 have been implicated in biological processes relevant to insulin resistance. Differential methylation at the significant HOXA5 and OSR1 DMPs is associated with differences in gene expression in the iMETHYL database. Analysis of differentially methylated regions (DMRs) did not identify any epigenome-wide DMRs for HOMA-IR. We tested transferability of HOMA-IR associated DMPs from five previous EWAS in Mexican Americans, Indian Asians, Europeans, and European ancestry Americans. Out of the 730 previously reported HOMA-IR DMPs, 47 (6.4%) were associated with HOMA-IR in this cohort of African Americans. Conclusions The findings from our study suggest substantial differences in DNA methylation patterns associated with insulin resistance across populations. Two of the DMPs we identified in African Americans have not been reported in other populations, and we found low transferability of HOMA-IR DMPs reported in other populations in African Americans. More work in African-ancestry populations is needed to confirm our findings as well as functional analyses to understand how such DNA methylation alterations contribute to T2D pathology. Supplementary Information The online version contains supplementary material available at 10.1186/s13148-022-01309-4.
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Affiliation(s)
- Felix P Chilunga
- Department of Public & Occupational Health, Amsterdam Public Health Research Institute, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Karlijn A C Meeks
- Center for Research on Genomics and Global Health, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Peter Henneman
- Department of Human Genetics, Amsterdam Reproduction & Development Research Institute, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Charles Agyemang
- Department of Public & Occupational Health, Amsterdam Public Health Research Institute, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Ayo P Doumatey
- Center for Research on Genomics and Global Health, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Charles N Rotimi
- Center for Research on Genomics and Global Health, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Adebowale A Adeyemo
- Center for Research on Genomics and Global Health, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA.
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6
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Trott J, Alpagu Y, Tan EK, Shboul M, Dawood Y, Elsy M, Wollmann H, Tano V, Bonnard C, Eng S, Narayanan G, Junnarkar S, Wearne S, Strutt J, Kumar A, Tomaz LB, Goy PA, Mzoughi S, Jennings R, Hagoort J, Eskin A, Lee H, Nelson SF, Al-Kazaleh F, El-Khateeb M, Fathallah R, Shah H, Goeke J, Langley SR, Guccione E, Hanley N, De Bakker BS, Reversade B, Dunn NR. Mitchell-Riley syndrome iPSCs exhibit reduced pancreatic endoderm differentiation due to a mutation in RFX6. Development 2020; 147:dev194878. [PMID: 33033118 DOI: 10.1242/dev.194878] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 09/15/2020] [Indexed: 12/11/2022]
Abstract
Mitchell-Riley syndrome (MRS) is caused by recessive mutations in the regulatory factor X6 gene (RFX6) and is characterised by pancreatic hypoplasia and neonatal diabetes. To determine why individuals with MRS specifically lack pancreatic endocrine cells, we micro-CT imaged a 12-week-old foetus homozygous for the nonsense mutation RFX6 c.1129C>T, which revealed loss of the pancreas body and tail. From this foetus, we derived iPSCs and show that differentiation of these cells in vitro proceeds normally until generation of pancreatic endoderm, which is significantly reduced. We additionally generated an RFX6HA reporter allele by gene targeting in wild-type H9 cells to precisely define RFX6 expression and in parallel performed in situ hybridisation for RFX6 in the dorsal pancreatic bud of a Carnegie stage 14 human embryo. Both in vitro and in vivo, we find that RFX6 specifically labels a subset of PDX1-expressing pancreatic endoderm. In summary, RFX6 is essential for efficient differentiation of pancreatic endoderm, and its absence in individuals with MRS specifically impairs formation of endocrine cells of the pancreas head and tail.
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Affiliation(s)
- Jamie Trott
- Institute of Medical Biology, Agency for Science Technology and Research (A*STAR), 8A Biomedical Grove, #06-06 Immunos, 138648, Singapore
| | - Yunus Alpagu
- Institute of Medical Biology, Agency for Science Technology and Research (A*STAR), 8A Biomedical Grove, #06-06 Immunos, 138648, Singapore
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551
| | - Ee Kim Tan
- Institute of Medical Biology, Agency for Science Technology and Research (A*STAR), 8A Biomedical Grove, #06-06 Immunos, 138648, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, Clinical Sciences Building, 11 Mandalay Road, 308232, Singapore
| | - Mohammad Shboul
- Institute of Medical Biology, Agency for Science Technology and Research (A*STAR), 8A Biomedical Grove, #06-06 Immunos, 138648, Singapore
- Department of Medical Laboratory Sciences, Jordan University of Science and Technology, Irbid 2210, Jordan
| | - Yousif Dawood
- Department of Medical Biology, Section Clinical Anatomy and Embryology, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
- Department of Obstetrics and Gynaecology, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
| | - Michael Elsy
- Faculty of Biology, Medicine & Health, University of Manchester, Oxford Road, Manchester M13 9PT, UK
| | - Heike Wollmann
- Institute of Molecular and Cellular Biology, Agency for Science Technology and Research (A*STAR), 61 Biopolis Drive, 138673, Singapore
| | - Vincent Tano
- Lee Kong Chian School of Medicine, Nanyang Technological University, Clinical Sciences Building, 11 Mandalay Road, 308232, Singapore
| | - Carine Bonnard
- Institute of Medical Biology, Agency for Science Technology and Research (A*STAR), 8A Biomedical Grove, #06-06 Immunos, 138648, Singapore
| | - Shermaine Eng
- Institute of Medical Biology, Agency for Science Technology and Research (A*STAR), 8A Biomedical Grove, #06-06 Immunos, 138648, Singapore
| | - Gunaseelan Narayanan
- Institute of Medical Biology, Agency for Science Technology and Research (A*STAR), 8A Biomedical Grove, #06-06 Immunos, 138648, Singapore
| | - Seetanshu Junnarkar
- Institute of Medical Biology, Agency for Science Technology and Research (A*STAR), 8A Biomedical Grove, #06-06 Immunos, 138648, Singapore
| | - Stephen Wearne
- Institute of Medical Biology, Agency for Science Technology and Research (A*STAR), 8A Biomedical Grove, #06-06 Immunos, 138648, Singapore
| | - James Strutt
- Institute of Medical Biology, Agency for Science Technology and Research (A*STAR), 8A Biomedical Grove, #06-06 Immunos, 138648, Singapore
| | - Aakash Kumar
- Institute of Medical Biology, Agency for Science Technology and Research (A*STAR), 8A Biomedical Grove, #06-06 Immunos, 138648, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, Clinical Sciences Building, 11 Mandalay Road, 308232, Singapore
| | - Lucian B Tomaz
- Lee Kong Chian School of Medicine, Nanyang Technological University, Clinical Sciences Building, 11 Mandalay Road, 308232, Singapore
| | - Pierre-Alexis Goy
- Institute of Molecular and Cellular Biology, Agency for Science Technology and Research (A*STAR), 61 Biopolis Drive, 138673, Singapore
| | - Slim Mzoughi
- Institute of Molecular and Cellular Biology, Agency for Science Technology and Research (A*STAR), 61 Biopolis Drive, 138673, Singapore
| | - Rachel Jennings
- Faculty of Biology, Medicine & Health, University of Manchester, Oxford Road, Manchester M13 9PT, UK
- Endocrinology Department, Manchester University NHS Foundation Trust, Grafton Street, Manchester M13 9WU, UK
| | - Jaco Hagoort
- Department of Medical Biology, Section Clinical Anatomy and Embryology, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
| | - Ascia Eskin
- Department of Human Genetics, David Geffen School of Medicine at UCLA, 695 Charles E. Young Drive South, Box 708822, Los Angeles, CA 90095-7088, USA
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
| | - Hane Lee
- Department of Human Genetics, David Geffen School of Medicine at UCLA, 695 Charles E. Young Drive South, Box 708822, Los Angeles, CA 90095-7088, USA
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
| | - Stanley F Nelson
- Department of Human Genetics, David Geffen School of Medicine at UCLA, 695 Charles E. Young Drive South, Box 708822, Los Angeles, CA 90095-7088, USA
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
- Department of Pediatrics, UCLA Mattel Children's Hospital, Los Angeles, CA 90095, USA
| | - Fawaz Al-Kazaleh
- Department of Obstetrics and Gynecology, University of Jordan, Amman 19241, Jordan
| | - Mohammad El-Khateeb
- National Center for Diabetes, Endocrinology and Genetics, Amman 19241, Jordan
| | - Rajaa Fathallah
- National Center for Diabetes, Endocrinology and Genetics, Amman 19241, Jordan
| | - Harsha Shah
- Department of Obstetrics and Gynaecology, Queen Charlotte's & Chelsea Hospital, Imperial College London, Du Cane Road, London W12 0HS, UK
| | - Jonathan Goeke
- Genome Institute of Singapore, Agency for Science Technology and Research (A*STAR), 60 Biopolis Street, 138672, Singapore
| | - Sarah R Langley
- Lee Kong Chian School of Medicine, Nanyang Technological University, Clinical Sciences Building, 11 Mandalay Road, 308232, Singapore
| | - Ernesto Guccione
- Institute of Molecular and Cellular Biology, Agency for Science Technology and Research (A*STAR), 61 Biopolis Drive, 138673, Singapore
| | - Neil Hanley
- Faculty of Biology, Medicine & Health, University of Manchester, Oxford Road, Manchester M13 9PT, UK
- Endocrinology Department, Manchester University NHS Foundation Trust, Grafton Street, Manchester M13 9WU, UK
| | - Bernadette S De Bakker
- Department of Medical Biology, Section Clinical Anatomy and Embryology, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
| | - Bruno Reversade
- Institute of Medical Biology, Agency for Science Technology and Research (A*STAR), 8A Biomedical Grove, #06-06 Immunos, 138648, Singapore
- Institute of Molecular and Cellular Biology, Agency for Science Technology and Research (A*STAR), 61 Biopolis Drive, 138673, Singapore
- Department of Paediatrics, National University of Singapore, Yong Loo Lin School of Medicine, 1E Kent Ridge Road, NUHS Tower Block, Level 12, 119228, Singapore
- Koç University School of Medicine, Medical Genetics Department, Istanbul 34450, Turkey
| | - N Ray Dunn
- Institute of Medical Biology, Agency for Science Technology and Research (A*STAR), 8A Biomedical Grove, #06-06 Immunos, 138648, Singapore
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551
- Lee Kong Chian School of Medicine, Nanyang Technological University, Clinical Sciences Building, 11 Mandalay Road, 308232, Singapore
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