IL-19 Contributes to the Development of Nonalcoholic Steatohepatitis by Altering Lipid Metabolism.

IL-19 Contributes to the Development of Nonalcoholic Steatohepatitis by Altering Lipid Metabolism.
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DOI:
10.3390/cells10123513
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发表时间:
2021-12-13
期刊:
影响因子:
6
通讯作者:
Tsuneyama K
Tsuneyama K
中科院分区:
生物学2区
文献类型:
--
作者:
Azuma YT;Fujita T;Izawa T;Hirota K;Nishiyama K;Ikegami A;Aoyama T;Ike M;Ushikai Y;Kuwamura M;Fujii H;Tsuneyama K

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白细胞介素 (IL)-19 是 IL-10 家族的成员,是一种主要由巨噬细胞产生的抗炎细胞因子。非酒精性脂肪性肝炎(NASH)是一种由非酒精性脂肪肝病(NAFLD)发展而来的疾病,其特征是炎症和纤维化。我们使用 60% 高脂饮食、0.1% 蛋氨酸、不含胆碱和 2% 胆固醇 (CDAHFD) 评估了 NAFLD/NASH 小鼠模型中 IL-19 的功能。野生型 (WT) 和 IL-19 基因缺陷 (KO) 小鼠以 CDAHFD 或标准饮食喂养 9 周。 CDAHFD 诱导的肝损伤、炎症和纤维化在 IL-19 KO 小鼠中明显比 WT 小鼠更严重。 IL-19 KO 小鼠中的 IL-6、TNF-α 和 TGF-β 显着高于 WT 小鼠。作为体外实验的机制,在 HepG2 细胞中添加 IL-19 可以降低棕榈酸酯诱导的甘油三酯和胆固醇含量。此外,添加IL-19可降低HepG2细胞中脂肪酸合成相关酶的表达并增加ATP含量。 IL-19 的体外作用抑制脂质代谢。总之,IL-19可能通过直接调节肝脏代谢在脂肪变性和纤维化的发生发展中发挥重要作用,并可能成为肝病治疗的潜在靶点。
Interleukin (IL)-19, a member of the IL-10 family, is an anti-inflammatory cytokine produced primarily by macrophages. Nonalcoholic steatohepatitis (NASH) is a disease that has progressed from nonalcoholic fatty liver disease (NAFLD) and is characterized by inflammation and fibrosis. We evaluated the functions of IL-19 in a NAFLD/NASH mouse model using a 60% high fat diet with 0.1% methionine, without choline, and with 2% cholesterol (CDAHFD). Wild-type (WT) and IL-19 gene-deficient (KO) mice were fed a CDAHFD or standard diet for 9 weeks. Liver injury, inflammation, and fibrosis induced by CDAHFD were significantly worse in IL-19 KO mice than in WT mice. IL-6, TNF-α, and TGF-β were significantly higher in IL-19 KO mice than in WT mice. As a mechanism using an in vitro experiment, palmitate-induced triglyceride and cholesterol contents were decreased by the addition of IL-19 in HepG2 cells. Furthermore, addition of IL-19 decreased the expression of fatty acid synthesis-related enzymes and increased ATP content in HepG2 cells. The action of IL-19 in vitro suppressed lipid metabolism. In conclusion, IL-19 may play an important role in the development of steatosis and fibrosis by directly regulating liver metabolism and may be a potential target for the treatment of liver diseases.
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