Upregulation of 24(R/S),25-epoxycholesterol and 27-hydroxycholesterol suppresses the proliferation and migration of gastric cancer cells

被引:29
作者
Guo, Fenghua [1 ]
Hong, Wenting [2 ]
Yang, Mingjie [2 ]
Xu, Dongke [2 ]
Bai, Qianming [3 ,4 ]
Li, Xiaobo [2 ]
Chen, Zongyou [1 ]
机构
[1] Fudan Univ, Huashan Hosp, Dept Gen Surg, Shanghai Med Coll, Shanghai, Peoples R China
[2] Fudan Univ, Sch Basic Med Sci, Dept Physiol & Pathophysiol, Shanghai 200032, Peoples R China
[3] Fudan Univ, Dept Pathol, Shanghai Canc Ctr, Shanghai, Peoples R China
[4] Fudan Univ, Shanghai Med Coll, Dept Oncol, Shanghai, Peoples R China
基金
中国国家自然科学基金;
关键词
Gastric cancer; Oxysterols; 27-Hydroxycholesterol; 24(R/S); 25-epoxycholesterol; SMOOTH-MUSCLE-CELLS; CHOLESTEROL HOMEOSTASIS; LXR ACTIVATION; 24(S); 25-EPOXYCHOLESTEROL; OXYSTEROLS;
D O I
10.1016/j.bbrc.2018.09.058
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Gastric cancer (GC) is one of the most common cancers and is the second-leading cause of cancer associated morbidity worldwide. Oxysterols are oxidized derivatives of cholesterol that may be important in many biological processes, but the levels and roles of oxysterols in gastric turnouts remain to be elucidated. The levels of cholesterol, oxysterols and sulfated oxysterols in human gastric tumour tissues, adjacent normal mucosal tissues, cancerous gastric juice and gastric juice obtained from healthy subjects were detected by LC-MS. It was found that the levels of 24(R/S),25-EC and 27HC in human gastric tumour tissues and cancerous gastric juice were significantly increased compared with those of adjacent normal mucosal tissues and gastric juice from healthy subjects. Compared with normal gastric mucosal tissue, the levels of sulfated 25-hydroxycholesterol (25HC3S) and the ratio of 25HC3S/25HC were decreased in human gastric tumour tissues, which might be related to the dramatically decreased SULT2A1 expression in gastric tumour tissue. Both 24(R/S),25-EC and 27HC suppressed gastric cancer proliferation, which was not altered by LXR alpha-siRNA treatment. The suppression of cell proliferation induced by 27HC was attenuated by LXR beta-siRNA, but the suppression of cell proliferation induced by 24(R/S),25-EC was intensified by LXR beta-siRNA. Both 24(R/S),25-EC and 27HC dramatically inhibited HGC-27 cell migration, which was attenuated by the co-transfection of cells with LXR alpha-siRNA and LXr beta-siRNA, but not LXR alpha-siRNA or LXR beta-siRNA alone. In conclusion, the accumulated 24(R/S),25-EC and 27HC in human gastric tumour tissues might play important roles in gastric cancer development. (C) 2018 Elsevier Inc. All rights reserved.
引用
收藏
页码:892 / 898
页数:7
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