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Updated: Jan 24, 2026

Study of In Vivo Glucose Metabolism in High-fat Diet-fed Mice Using Oral Glucose Tolerance Test OGTT and Insulin Tolerance Test ITT
Published on: January 7, 2018
Pericentrin expression in pancreatic β cells is associated impaired glucose tolerance
Liangchen Wang1,2, Yanping Gong1, Chunlin Li1
1Department of Geriatric Endocrinology, Chinese People's Liberation Army General Hospital, National Clinical Research Center for Geriatric Disease Beijing 100853, China.
Objective:
To explore the role and mechanism of pericentrin (PCNT) in impaired glucose tolerance.
Methods:
Mouse model of specific PCNT reduction in β-cells (PCNTβPCNT) was built using a Tet-on induction system; mouse model of impaired glucose tolerance was built by high-fat feeding. MIN6 cells were divided into control and Si-PCNT groups.
Results:
An obvious decrease in PCNT, F-actin, and insulin expression in Si-PCNT cells (P < 0.01) was observed, and the stimulating effect of GLP-1 on first phase insulin secretion disappeared in Si-PCNT cells. PCNTβ exhibited impaired first phase insulin secretion and abnormal glucose tolerance (P < 0.05 or P < 0.01). Fewer insulin granules smaller than 300 nm were detected in PCNTβ (P < 0.05). PCNT expression decreased progressively with insulin resistance (P < 0.05 and P < 0.01). First phase insulin secretion and glucose tolerance decreased with PCNT levels. The homeostasis model assessment-insulin resistance was negatively correlated with PCNT expression.
Conclusions:
PCNT plays an important role in modulating first phase insulin release by adjusting distribution of insulin granules and was closely related to development of impaired glucose tolerance induced by the high-fat diet. PCNT might be a therapeutic target for diabetes prevention.
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