ArticleAnnals of pediatric endocrinology & metabolism2021
Identification of sphingosine 1-phosphate level and MAPK/ERK signaling in pancreatic β cells.
Article in Annals of pediatric endocrinology & metabolism, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed, 6 citations in OpenAlex.
- Metabolomic profiling and vitamin D pathway investigation in diabetic foot ulcer patients.Metabolomics : Official journal of the Metabolomic Society · 2026Article
- Metabolic self-feeding in HBV-associated hepatocarcinoma centered on feedback between circulation lipids and the cellular MAPK/mTOR axis.Cell communication and signaling : CCS · 2024Article
- [Research advances of the roles of sphingosine-1-phosphate in acute lung injury].Zhonghua shao shang yu chuang mian xiu fu za zhi · 2022Review
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Authors and funding
4 authors at 3 institutions in 1 country.
Funding
Abstract
purposeSphingosine kinase is a lipid kinase that phosphorylates sphingosine to generate sphingosine 1-phosphate (S1P). S1P regulates pancreatic islet β-cell endoplasmic reticulum stress and proliferation. Type 1 and type 2 diabetes share some key pathogenic processes. In this study, we investigated whether secretion of insulin and production of S1P is altered in alloxan and glucose-treated cells from the rat pancreatic β-cell line RIN-5F.
methodsRIN-5F cells were treated with 2 mM alloxan and 20 mM glucose for 6 hours or 24 hours before being evaluated by enzyme linked immunosorbent assay (ELISA) and Western blotting.
resultsInsulin secretion and expression was higher in RIN-5F cells treated with glucose compared to control cells. In contrast, alloxan treatment did not affect insulin secretion and expression in RIN-5F cells. Interestingly, compared with normal control levels, S1P/EDG-5 was increased in both alloxan and glucose-treated pancreatic β cell than normal control. Mitogen-activated protein kinase/extracellular signal-regulated kinase (MAPK/ERK) inhibition strongly decreased the expression of insulin and S1P in glucose- or alloxan-treated RIN-5F cells.
conclusionWe observe that production of S1P is increased in both diabetic cell models. In addition, MAPK/ERK signaling regulates secretion of insulin and S1P expression in pancreatic β-cells. Based on the literature and our findings, S1P may be a promising agent for the treatment of insulin-related disorders.
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