Li GS, Liu XH, Huang L, Zhu H, Liu YL, Ma CM. Mechanisms underlying the development of hepatic steatosis-related insulin resistance in Chinese hamsters with type 2 diabetes.
Shijie Huaren Xiaohua Zazhi 2011;
19:457-466. [DOI:
10.11569/wcjd.v19.i5.457]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the mechanisms underlying the development of hepatic steatosis-related insulin resistance in Chinese hamsters with type 2 diabetes.
METHODS: Insulin-resistant obese Chinese hamsters and Chinese hamsters with type 2 diabetes were generated by feeding a high-fat diet with or without low-dose streptozotocin. Then we investigated the alterations in hepatic gene expression profiles by microarray analysis followed by real-time RT-PCR confirmation.
RESULTS: Microarray analysis indicated that, in insulin-resistant obese Chinese hamsters and those with type 2 diabetes, differentially expressed metabolism-related genes were mainly associated with hepatic glycolipid metabolism and related signaling pathways. Real-time RT-PCR analysis verified that the expression of hepatic sterol regulatory element-binding proteins (SREBPs) and peroxisome proliferator-activated receptors (PPAR) γ was increased (all P < 0.05), the expression of liver X receptor α (LXRα), PPARα, and PPARβ/δ was decreased (all P < 0.05), and the expression of LXR β was unchanged in the liver of hamster models. The expression of hepatic LXR α, SREBPs, PPARs and their target genes in insulin-resistant hamsters significantly differed from that in type 2 diabetic hamsters (all P < 0.05).
CONCLUSION: Altered expression of LXR α, SREBPs and PPARs may be involved in the development of hepatic steatosis-related insulin resistance in type 2 diabetic Chinese hamsters.
Collapse