ZHANG Chang-hua1, HU Xian-hong1, ZHANG Zhong-wei2, et al. TNF-α Induced Insulin Resistance Model in 3T3-L1 Adipocyte[J]. Chinese journal of experimental traditional medical formulae, 2012, 18(18): 171-174.
ZHANG Chang-hua1, HU Xian-hong1, ZHANG Zhong-wei2, et al. TNF-α Induced Insulin Resistance Model in 3T3-L1 Adipocyte[J]. Chinese journal of experimental traditional medical formulae, 2012, 18(18): 171-174. DOI: 10.13422/j.cnki.syfjx.2012.18.091.
Objective:To study the effect of tumor necrosis factor α(TNF-α) on glucose consumption in 3T3-L1 adipocyte and find the method of establishing a cell insulin resistance model.Method:The 3T3-L1 preadipocytes were differentiated to 3T3-L1 adipocytes with 1-methyl-3-isobuthylxanthine
dexamethasone and insulin.3T3-L1 adipocytes were exposed to 20
10
5 μg · L-1 TNF-α for 96 h
then added 100 nmol · L-1 insulin for 30 min.The amount of glucose consumption was determined by detecting the glucose content in cell culture supernatants with glucose oxidase(GOD) assay.Result: TNF-α markedly decreased both basal and insulin-stimulated glucose uptake.This effect was concentration-dependent
and 20 μg · L-1TNF-α decreased glucose uptake of 79.2% and 81.4%(P<0.05) in the basal and 100 μg · L-1 insulin-stimulated conditions
respectively.Conclusion:20 μg · L-1TNF-α can induce insulin resistance in 3T3-L1 adipocytes.A novel and reliable cell model of insulin resistance is successfully established.