Tumor necrosis factor- (cid:1) directly stimulates the overproduction of hepatic apolipoprotein B100-containing VLDL via impairment of hepatic insulin signaling
Tumor necrosis factor- (cid:1) directly stimulates the overproduction of hepatic apolipoprotein B100-containing VLDL via impairment of hepatic insulin signaling
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肿瘤坏死因子- (cid:1) 通过损害肝脏胰岛素信号传导直接刺激含载脂蛋白 B100 的肝载脂蛋白 B100 的过量产生
DOI:
10.1152/ajpgi.00407.2007
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发表时间:
2008
影响因子:
4.5
通讯作者:
Khosrow Adeli
中科院分区:
文献类型:
--
作者:
B. Qin;Richard A. Anderson;Khosrow Adeli
Qin K. Tumor necrosis factor- (cid:1) directly stimulates the overproduction of hepatic apolipoprotein B100-con-taining VLDL via impairment of hepatic insulin signaling. Am J Physiol doi:10.1152/ajpgi.00407.2007.—Insulin-resistant states are commonly associated with both increased circulating levels of tumor necrosis factor (TNF)- (cid:1) and hepatic overproduction of very low density lipoproteins (VLDL). Here, we provide evidence that increased TNF- (cid:1) can directly stimulate the hepatic assembly and secretion of apolipoprotein B (apoB) 100-containing VLDL 1 , using the Syrian golden hamster, an animal model that closely resembles humans in hepatic VLDL-apoB100 metabolism. In vivo TNF- (cid:1) infusion fo r 4 h inchow-fed hamsters induced whole-body insulin resistance on the basis of euglycemic hyperinsulinemic clamp studies. Immunoprecipitation and immunoblotting analysis of livers from TNF- (cid:1) -treated hamsters indicated decreased tyrosine phosphorylation of insulin receptor (IR)- (cid:2) , IR substrate-1 (Tyr), Akt (Ser 473 ), p38, ERK1/2, and JNK but increased serine phosphorylation of IRS-1 (Ser 307 ) and Shc. TNF- (cid:1) infusion also significantly increased hepatic production of total circulating apoB100 and VLDL-apoB100 in both fasting and postprandial (fat load) states. Ex vivo experiments, using cultured primary hepatocytes from hamsters, also showed TNF- (cid:1) -induced VLDL-apoB100 oversecretion, an effect that was blocked by TNF receptor 2 antibody. Unexpectedly, TNF- (cid:1) decreased the sterol regulatory element-binding protein-1c mass and mRNA levels but significantly increased microsomal triglyceride transfer protein mass and mRNA levels in primary hepatocytes. In summary, these data provide direct evidence that TNF- (cid:1) induces whole-body insulin resistance and impairs hepatic insulin signaling accompanied by overproduction of apoB100-containing VLDL particles, an effect likely mediated via TNF receptor 2. crosomal triglyceride transfer protein (MTP) primers, 5 (cid:6) -GTCAG-GAAGCTGTGTCAGAATG-3 (cid:6) and 5 (cid:6) - CTCCTTTTTCTCTGGC-TTTTCA-3 (cid:6) ; and 18S primers, 5 (cid:6) -TAAGTCCCTGCCC TTTG TA-CACA-3 (cid:6) and 5 (cid:6) -GATCCGAGGGCCTCACTAAAC-3 (cid:6) .
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DOI:
10.1006/bbrc.1996.0849
发表时间:
1996
期刊:
Biochemical and biophysical research communications.
影响因子:
--
作者:
Li,PM;Goldstein,BJ
通讯作者:
Goldstein,BJ
DOI:
10.1152/ajpendo.2000.279.5.e1003
发表时间:
2000-11-01
影响因子:
5.1
作者:
Chirieac, DV;Chirieac, LR;Sparks, JD
通讯作者:
Sparks, JD
影响因子:
56.9
作者:
HOTAMISLIGIL, GS;SHARGILL, NS;SPIEGELMAN, BM
通讯作者:
SPIEGELMAN, BM
影响因子:
7.7
作者:
Garvey, WT;Kwon, S;Liao, YL
通讯作者:
Liao, YL
影响因子:
4.8
作者:
FEINGOLD, KR;SERIO, MK;GRUNFELD, C
通讯作者:
GRUNFELD, C