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Improvement of High-glucose and Insulin Resistance of Chromium Malate in 3T3-L1 Adipocytes by Glucose Uptake and Insulin Sensitivity Signaling Pathways and Its Mechanism

Overview
Journal RSC Adv
Specialty Chemistry
Date 2022 May 6
PMID 35521592
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Abstract

Previous study has revealed that chromium malate could improve insulin resistance and the regulation of fasting blood glucose in type 2 diabetic rats. This study was designed to investigate the effect of chromium malate on hypoglycemic and improve insulin resistance activities in 3T3-L1 adipocytes with insulin resistance and investigate the acting mechanism. The result indicated that chromium malate exhibited direct hypoglycemic activity . Compared with the model group, chromium malate could significantly promote the expression levels of GLUT-4, Akt, Irs-1, PPARγ, PI3K and p38-MAPK and their mRNA, increase -AKT/AKT level, AKT and AMPKβ1 phosphorylation and reduce Irs-1 phosphorylation and -Irs-1/Irs-1 level in 3T3-L1 adipocytes ( < 0.05). Chromium malate is more effective in regulating the proteins and mRNA expressions than those of chromium trichloride and chromium picolinate. Compared to the model group, pretreatment with the specific p38-MAPK inhibitor completely inhibited the GLUT-4 and Irs-1 proteins and mRNA expressions induced by the chromium malate. In conclusion, chromium malate had a beneficial influence on improvement of controlling glucose levels and insulin resistance in 3T3-L1 adipocytes with insulin resistance by regulating proteins productions and genes expressions in glucose uptake and insulin sensitivity signaling pathways.

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