Glucocorticoid induces human beta cell dysfunction by involving riborepressor GAS5 LincRNA
Objective: A widely recognized metabolic side effect of glucocorticoid (GC) therapy is steroid-induced diabetes mellitus (DM). However, studies on the molecular basis of GC-induced pancreatic beta cell dysfunction in human beta cells are lacking. The significance of non-coding RNAs in various cellul...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2020-02-01
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| Series: | Molecular Metabolism |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2212877819309640 |
| _version_ | 1819089401826770944 |
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| author | Jonathan L.S. Esguerra Jones K. Ofori Mototsugu Nagao Yuki Shuto Alexandros Karagiannopoulos Joao Fadista Hitoshi Sugihara Leif Groop Lena Eliasson |
| author_facet | Jonathan L.S. Esguerra Jones K. Ofori Mototsugu Nagao Yuki Shuto Alexandros Karagiannopoulos Joao Fadista Hitoshi Sugihara Leif Groop Lena Eliasson |
| author_sort | Jonathan L.S. Esguerra |
| collection | DOAJ |
| description | Objective: A widely recognized metabolic side effect of glucocorticoid (GC) therapy is steroid-induced diabetes mellitus (DM). However, studies on the molecular basis of GC-induced pancreatic beta cell dysfunction in human beta cells are lacking. The significance of non-coding RNAs in various cellular processes is emerging. In this study, we aimed to show the direct negative impact of GC on beta cell function and elucidate the role of riborepressor GAS5 lincRNA in the GC signaling pathway in human pancreatic beta cells. Methods: Patients undergoing two weeks of high-dose prednisolone therapy were monitored for C-peptide levels. Human pancreatic islets and the human beta cell line EndoC-βH1 were incubated in pharmacological concentrations of dexamethasone. The GAS5 level was modulated using anti-sense LNA gapmeR or short oligonucleotides with GAS5 HREM (hormone response element motif). Immunoblotting and/or real-time PCR were used to assess changes in protein and RNA expression, respectively. Functional characterization included glucose-stimulated insulin secretion and apoptosis assays. Correlation analysis was performed on RNAseq data of human pancreatic islets. Results: We found reduced C-peptide levels in patients undergoing high-dose GC therapy. Human islets and the human beta cell line EndoC-βH1 exposed to GC exhibited reduced insulin secretion and increased apoptosis. Concomitantly, reduced expression of important beta cell transcription factors, PDX1 and NKX6-1, as well as exocytotic protein SYT13 were observed. The expression of the glucocorticoid receptor was decreased, while that of serum and glucocorticoid-regulated kinase 1 (SGK1) was elevated. The expression of these genes was found to significantly correlate with GAS5 in human islet transcriptomics data. Increasing GAS5 levels using GAS5 HREM alleviated the inhibitory effects of dexamethasone on insulin secretion. Conclusions: The direct adverse effect of glucocorticoid in human beta cell function is mediated via important beta cell proteins and components of the GC signaling pathway in an intricate interplay with GAS5 lincRNA, a potentially novel therapeutic target to counter GC-mediated beta cell dysfunction. Keywords: Glucocorticoid, Long intergenic non-coding RNA, Insulin secretion, Pancreatic islets, Beta cells, Type-2 diabetes mellitus |
| first_indexed | 2024-12-21T22:07:21Z |
| format | Article |
| id | doaj.art-bb327f4b2515459695089bf377a819f8 |
| institution | Directory Open Access Journal |
| issn | 2212-8778 |
| language | English |
| last_indexed | 2024-12-21T22:07:21Z |
| publishDate | 2020-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Molecular Metabolism |
| spelling | doaj.art-bb327f4b2515459695089bf377a819f82022-12-21T18:48:40ZengElsevierMolecular Metabolism2212-87782020-02-0132160167Glucocorticoid induces human beta cell dysfunction by involving riborepressor GAS5 LincRNAJonathan L.S. Esguerra0Jones K. Ofori1Mototsugu Nagao2Yuki Shuto3Alexandros Karagiannopoulos4Joao Fadista5Hitoshi Sugihara6Leif Groop7Lena Eliasson8Islet Cell Exocytosis, Department of Clinical Sciences-Malmö, Lund University, Malmö, Sweden; Lund University Diabetes Centre, Skåne University Hospital, Malmö, Sweden; Corresponding author. Islet Cell Exocytosis, Department of Clinical Sciences-Malmö, Lund University, Malmö, Sweden.Islet Cell Exocytosis, Department of Clinical Sciences-Malmö, Lund University, Malmö, Sweden; Lund University Diabetes Centre, Skåne University Hospital, Malmö, SwedenIslet Cell Exocytosis, Department of Clinical Sciences-Malmö, Lund University, Malmö, Sweden; Department of Endocrinology, Diabetes and Metabolism, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan; Lund University Diabetes Centre, Skåne University Hospital, Malmö, SwedenDepartment of Endocrinology, Diabetes and Metabolism, Graduate School of Medicine, Nippon Medical School, Tokyo, JapanIslet Cell Exocytosis, Department of Clinical Sciences-Malmö, Lund University, Malmö, Sweden; Lund University Diabetes Centre, Skåne University Hospital, Malmö, SwedenDepartment of Epidemiology Research, Statens Serum Institut, 2300, Copenhagen S, DenmarkDepartment of Endocrinology, Diabetes and Metabolism, Graduate School of Medicine, Nippon Medical School, Tokyo, JapanDiabetes and Endocrinology, Department of Clinical Sciences-Malmö, Lund University, Malmö, Sweden; Lund University Diabetes Centre, Skåne University Hospital, Malmö, SwedenIslet Cell Exocytosis, Department of Clinical Sciences-Malmö, Lund University, Malmö, Sweden; Lund University Diabetes Centre, Skåne University Hospital, Malmö, SwedenObjective: A widely recognized metabolic side effect of glucocorticoid (GC) therapy is steroid-induced diabetes mellitus (DM). However, studies on the molecular basis of GC-induced pancreatic beta cell dysfunction in human beta cells are lacking. The significance of non-coding RNAs in various cellular processes is emerging. In this study, we aimed to show the direct negative impact of GC on beta cell function and elucidate the role of riborepressor GAS5 lincRNA in the GC signaling pathway in human pancreatic beta cells. Methods: Patients undergoing two weeks of high-dose prednisolone therapy were monitored for C-peptide levels. Human pancreatic islets and the human beta cell line EndoC-βH1 were incubated in pharmacological concentrations of dexamethasone. The GAS5 level was modulated using anti-sense LNA gapmeR or short oligonucleotides with GAS5 HREM (hormone response element motif). Immunoblotting and/or real-time PCR were used to assess changes in protein and RNA expression, respectively. Functional characterization included glucose-stimulated insulin secretion and apoptosis assays. Correlation analysis was performed on RNAseq data of human pancreatic islets. Results: We found reduced C-peptide levels in patients undergoing high-dose GC therapy. Human islets and the human beta cell line EndoC-βH1 exposed to GC exhibited reduced insulin secretion and increased apoptosis. Concomitantly, reduced expression of important beta cell transcription factors, PDX1 and NKX6-1, as well as exocytotic protein SYT13 were observed. The expression of the glucocorticoid receptor was decreased, while that of serum and glucocorticoid-regulated kinase 1 (SGK1) was elevated. The expression of these genes was found to significantly correlate with GAS5 in human islet transcriptomics data. Increasing GAS5 levels using GAS5 HREM alleviated the inhibitory effects of dexamethasone on insulin secretion. Conclusions: The direct adverse effect of glucocorticoid in human beta cell function is mediated via important beta cell proteins and components of the GC signaling pathway in an intricate interplay with GAS5 lincRNA, a potentially novel therapeutic target to counter GC-mediated beta cell dysfunction. Keywords: Glucocorticoid, Long intergenic non-coding RNA, Insulin secretion, Pancreatic islets, Beta cells, Type-2 diabetes mellitushttp://www.sciencedirect.com/science/article/pii/S2212877819309640 |
| spellingShingle | Jonathan L.S. Esguerra Jones K. Ofori Mototsugu Nagao Yuki Shuto Alexandros Karagiannopoulos Joao Fadista Hitoshi Sugihara Leif Groop Lena Eliasson Glucocorticoid induces human beta cell dysfunction by involving riborepressor GAS5 LincRNA Molecular Metabolism |
| title | Glucocorticoid induces human beta cell dysfunction by involving riborepressor GAS5 LincRNA |
| title_full | Glucocorticoid induces human beta cell dysfunction by involving riborepressor GAS5 LincRNA |
| title_fullStr | Glucocorticoid induces human beta cell dysfunction by involving riborepressor GAS5 LincRNA |
| title_full_unstemmed | Glucocorticoid induces human beta cell dysfunction by involving riborepressor GAS5 LincRNA |
| title_short | Glucocorticoid induces human beta cell dysfunction by involving riborepressor GAS5 LincRNA |
| title_sort | glucocorticoid induces human beta cell dysfunction by involving riborepressor gas5 lincrna |
| url | http://www.sciencedirect.com/science/article/pii/S2212877819309640 |
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