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Xu G, Chen J, Jo S, Grayson TB, Ramanadham S, Koizumi A, Germain-Lee EL, Lee SJ, Shalev A. Deletion of Gdf15 Reduces ER Stress-induced Beta-cell Apoptosis and Diabetes. Endocrinology 2022; 163:6548945. [PMID: 35290443 PMCID: PMC9272264 DOI: 10.1210/endocr/bqac030] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [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] [Received: 12/20/2021] [Indexed: 01/12/2023]
Abstract
Endoplasmic reticulum (ER) stress contributes to pancreatic beta-cell apoptosis in diabetes, but the factors involved are still not fully elucidated. Growth differentiation factor 15 (GDF15) is a stress response gene and has been reported to be increased and play an important role in various diseases. However, the role of GDF15 in beta cells in the context of ER stress and diabetes is still unclear. In this study, we have discovered that GDF15 promotes ER stress-induced beta-cell apoptosis and that downregulation of GDF15 has beneficial effects on beta-cell survival in diabetes. Specifically, we found that GDF15 is induced by ER stress in beta cells and human islets, and that the transcription factor C/EBPβ is involved in this process. Interestingly, ER stress-induced apoptosis was significantly reduced in INS-1 cells with Gdf15 knockdown and in isolated Gdf15 knockout mouse islets. In vivo, we found that Gdf15 deletion attenuates streptozotocin-induced diabetes by preserving beta cells and insulin levels. Moreover, deletion of Gdf15 significantly delayed diabetes development in spontaneous ER stress-prone Akita mice. Thus, our findings suggest that GDF15 contributes to ER stress-induced beta-cell apoptosis and that inhibition of GDF15 may represent a novel strategy to promote beta-cell survival and treat diabetes.
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Affiliation(s)
- Guanlan Xu
- Comprehensive Diabetes Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Correspondence: Guanlan Xu, PhD, Comprehensive Diabetes Center, University of Alabama at Birmingham, 1825 University Blvd, Shelby Bldg 1272, Birmingham, AL 35294-2182, USA. E-mail:
| | - Junqin Chen
- Comprehensive Diabetes Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - SeongHo Jo
- Comprehensive Diabetes Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Truman B Grayson
- Comprehensive Diabetes Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Sasanka Ramanadham
- Comprehensive Diabetes Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Akio Koizumi
- Institute of Public Health and Social Welfare Public Interest Incorporation Associations, Kyoto Hokenkai, Ukyo-ku Kyoto 615-8577, Japan
| | - Emily L Germain-Lee
- Department of Pediatrics, University of Connecticut School of Medicine, Farmington, CT 06030, USA
- Connecticut Children’s Center for Rare Bone Disorders, Farmington, CT 06032, USA
| | - Se-Jin Lee
- The Jackson Laboratory for Genomic Medicine, Farmington, CT 06032, USA
- University of Connecticut School of Medicine, Department of Genetics and Genome Sciences, Farmington, CT 06030, USA
| | - Anath Shalev
- Comprehensive Diabetes Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
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