1
|
Zhao L, Carmean CM, Landeche M, Chellan B, Sargis RM. Selenomethionine modulates insulin secretion in the MIN6-K8 mouse insulinoma cell line. FEBS Lett 2021; 595:3042-3055. [PMID: 34780071 PMCID: PMC10924436 DOI: 10.1002/1873-3468.14232] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 09/27/2021] [Accepted: 10/21/2021] [Indexed: 12/15/2022]
Abstract
Selenium is an essential trace element of interest for its potential role in glucose homeostasis. The present study investigated the impact of selenium supplementation as selenomethionine (SeMet) on insulin secretion in MIN6-K8 cells, a pancreatic β-cell model. We found that SeMet enhanced percent glucose-induced insulin secretion, while also increasing tolbutamide- and KCl-induced percent insulin secretion. RNA-sequencing showed that SeMet supplementation altered expression of several selenoproteins, including glutathione peroxidase 3 (Gpx3) and selenoprotein P (SelP). Targeted knockdown of Gpx3 increased both percent and total insulin release, while SelP knockdown increased insulin content and insulin release. Collectively, these studies support a putative role for selenium and selenoproteins in the regulation of insulin secretion, glucose homeostasis, and diabetes risk.
Collapse
Affiliation(s)
- Lidan Zhao
- Division of Endocrinology, Diabetes, and Metabolism, College of Medicine, University of Illinois at Chicago, IL, USA
- Department of Medicine, College of Medicine, University of Illinois at Chicago, IL, USA
| | - Christopher M Carmean
- Division of Endocrinology, Diabetes, and Metabolism, College of Medicine, University of Illinois at Chicago, IL, USA
- Department of Medicine, College of Medicine, University of Illinois at Chicago, IL, USA
- Chicago Center for Health and Environment (CACHET), University of Illinois at Chicago, IL, USA
| | - Michael Landeche
- Division of Endocrinology, Diabetes, and Metabolism, College of Medicine, University of Illinois at Chicago, IL, USA
- Department of Medicine, College of Medicine, University of Illinois at Chicago, IL, USA
| | - Bijoy Chellan
- Division of Endocrinology, Diabetes, and Metabolism, College of Medicine, University of Illinois at Chicago, IL, USA
- Department of Medicine, College of Medicine, University of Illinois at Chicago, IL, USA
| | - Robert M Sargis
- Division of Endocrinology, Diabetes, and Metabolism, College of Medicine, University of Illinois at Chicago, IL, USA
- Department of Medicine, College of Medicine, University of Illinois at Chicago, IL, USA
- Chicago Center for Health and Environment (CACHET), University of Illinois at Chicago, IL, USA
- Jesse Brown Veterans Affairs Medical Center, Chicago, IL, USA
| |
Collapse
|