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Iranian Journal of Basic Medical Sciences، جلد ۲۱، شماره ۵، صفحات ۵۰۲-۵۰۷
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عنوان انگلیسی Endoplasmic reticulum stress regulates inflammation in adipocyte of obese rats via toll-like receptors 4 signaling
چکیده انگلیسی مقاله Objective(s): To explore whether endoplasmic reticulum (ER) stress regulates inflammation in adipose tissue of obese rats via TLR4 signaling. Materials and Methods: Sprague Dawley rats were randomly divided into four groups, and body weight, food intake, and free fatty acids (FFA) were measured. Real-time PCR and Western blot were used to determine mRNA or protein expression of TLR4, TRAF6, IKKβ, TNF-α, IL-6, and GRP78. Immunohistochemistry was used to detect GRP78 protein expression. Results: The FFA levels in HFD, HFD+PBA, and HFD+VIPER groups were higher than that in the control group (P< 0.05). Compared with the control group, HFD induced GRP78 expression significantly (P< 0.05), which could be decreased by ER stress inhibitor but not by TLR4 blocker. The mRNA expression of TLR4, TRAF6, TNF-α, and IL-6, and protein levels of TLR4, TNF-α, and IKKβ in the HFD group increased significantly compared with the control group (P< 0.05), while these changes could be suppressed by PBA or VIPER (P< 0.05). The immunohistochemistry staining indicated GRP78 expression in the HFD group was higher than that of the control group, which could be inhibited by PBA or VIPER.Conclusion: HFD could induce inflammation in adipose tissue via ER stress and its downstream TLR4 signaling.
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نویسندگان مقاله | Xiaohua Li
Department of Endocrinology, Shanghai Seventh People’s Hospital, No. 358, Datong Road, Gaoqiao, Pudong New Area Shanghai, China
نشانی اینترنتی http://ijbms.mums.ac.ir/article_10546.html
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زبان مقاله منتشر شده en
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نوع مقاله منتشر شده Original Article
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