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Martin-Montalvo A, López-Noriega L, Jiménez-Moreno C, Herranz A, Lorenzo PI, Cobo-Vuilleumier N, Tamayo A, González-Guerrero C, Hofsteede JSWR, Lebreton F, Bosco D, García Toscano M, Herranz L, Anselmo J, Moreno JC, Gauthier BR. Transient PAX8 Expression in Islets During Pregnancy Correlates With β-Cell Survival, Revealing a Novel Candidate Gene in Gestational Diabetes Mellitus. Diabetes 2019; 68:109-118. [PMID: 30352879 DOI: 10.2337/db18-0285] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 10/17/2018] [Indexed: 11/13/2022]
Abstract
Transient Pax8 expression was reported in mouse islets during gestation, whereas a genome-wide linkage and admixture mapping study highlighted PAX8 as a candidate gene for diabetes mellitus (DM). We sought the significance of PAX8 expression in mouse and human islet biology. PAX8 was induced in gestating mouse islets and in human islets treated with recombinant prolactin. Global gene expression profiling of human and mouse islets overexpressing the corresponding species-specific PAX8 revealed the modulation of distinct genetic pathways that converge on cell survival. Accordingly, apoptosis was reduced in PAX8-overexpressing islets. These findings support that PAX8 could be a candidate gene for the study of gestational DM (GDM). PAX8 was genotyped in patients with GDM and gestational thyroid dysfunction (GTD), a pathology commonly found in patients with mutations on PAX8 A novel missense PAX8 mutation (p.T356M, c.1067C>T) was identified in a female diagnosed with GDM and GTD as well as in her father with type 2 DM but was absent in control patients. The p.T356M variant did not alter protein stability or cellular localization, whereas its transactivation activity was hindered. In parallel, a retrospective clinical analysis uncovered that a pregnant female harboring a second PAX8 mutation (p.P25R, c.74C>G) previously reported to cause congenital hypothyroidism also developed GDM. These data indicate that increased expression of PAX8 affects islet viability and that PAX8 could be considered as a candidate gene for the study of GDM.
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Affiliation(s)
- Alejandro Martin-Montalvo
- Pancreatic Islet Development and Regeneration Unit/Laboratory of Aging Biology, Centro Andaluz de Biología Molecular y Medicina Regenerativa-CABIMER, Universidad de Sevilla-CSIC-Universidad Pablo de Olavide, Seville, Spain
| | - Livia López-Noriega
- Pancreatic Islet Development and Regeneration Unit/Laboratory of Aging Biology, Centro Andaluz de Biología Molecular y Medicina Regenerativa-CABIMER, Universidad de Sevilla-CSIC-Universidad Pablo de Olavide, Seville, Spain
| | - Carmen Jiménez-Moreno
- Pancreatic Islet Development and Regeneration Unit/Laboratory of Aging Biology, Centro Andaluz de Biología Molecular y Medicina Regenerativa-CABIMER, Universidad de Sevilla-CSIC-Universidad Pablo de Olavide, Seville, Spain
| | - Amanda Herranz
- Thyroid Molecular Laboratory, Institute for Medical and Molecular Genetics, La Paz University Hospital, Autonomous University of Madrid, Madrid, Spain
| | - Petra I Lorenzo
- Pancreatic Islet Development and Regeneration Unit/Laboratory of Aging Biology, Centro Andaluz de Biología Molecular y Medicina Regenerativa-CABIMER, Universidad de Sevilla-CSIC-Universidad Pablo de Olavide, Seville, Spain
| | - Nadia Cobo-Vuilleumier
- Pancreatic Islet Development and Regeneration Unit/Laboratory of Aging Biology, Centro Andaluz de Biología Molecular y Medicina Regenerativa-CABIMER, Universidad de Sevilla-CSIC-Universidad Pablo de Olavide, Seville, Spain
| | - Alejandra Tamayo
- Thyroid Molecular Laboratory, Institute for Medical and Molecular Genetics, La Paz University Hospital, Autonomous University of Madrid, Madrid, Spain
| | - Cristian González-Guerrero
- Thyroid Molecular Laboratory, Institute for Medical and Molecular Genetics, La Paz University Hospital, Autonomous University of Madrid, Madrid, Spain
| | - Jonathan S W R Hofsteede
- Thyroid Molecular Laboratory, Institute for Medical and Molecular Genetics, La Paz University Hospital, Autonomous University of Madrid, Madrid, Spain
| | - Fanny Lebreton
- Cell Isolation and Transplantation Center, Department of Surgery, Geneva University Hospitals, Geneva, Switzerland
| | - Domenico Bosco
- Cell Isolation and Transplantation Center, Department of Surgery, Geneva University Hospitals, Geneva, Switzerland
| | | | - Lucrecia Herranz
- Thyroid Molecular Laboratory, Institute for Medical and Molecular Genetics, La Paz University Hospital, Autonomous University of Madrid, Madrid, Spain
| | - Joao Anselmo
- Department of Endocrinology and Nutrition, Hospital Divino Espírito Santo, Ponta Delgada, Portugal
| | - José Carlos Moreno
- Thyroid Molecular Laboratory, Institute for Medical and Molecular Genetics, La Paz University Hospital, Autonomous University of Madrid, Madrid, Spain
| | - Benoit R Gauthier
- Pancreatic Islet Development and Regeneration Unit/Laboratory of Aging Biology, Centro Andaluz de Biología Molecular y Medicina Regenerativa-CABIMER, Universidad de Sevilla-CSIC-Universidad Pablo de Olavide, Seville, Spain
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