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Regulation of Intestinal Epithelial Calcium Transport Proteins by Stanniocalcin-1 in Caco2 Cells

文献类型： 外文期刊

作者： Xiang, Jinmei 1 ; Guo, Rui 3 ; Wan, Chunyun 1 ; Wu, Liming 1 ; Yang, Shijin 1 ; Guo, Dingzong 1 ;

作者机构： 1.Huazhong Agr Univ, Coll Vet Med, Wuhan 430070, Hubei, Peoples R China

2.Hubei Vocat Coll Biotechnol, Dept Anim Sci, Wuhan 430070, Hubei, Peoples R China

3.Hubei Acad Agr Sci, Hubei Key Lab Embryo & Mol Breeding, Wuhan 430064, Hubei, Peoples R China

4.Yangtze Univ, Coll Anim Sci, Jingzhou 434023, Hubei, Peoples R China

关键词： calcium;intestinal epithelium;stanniocalcin-1;TRPV5;TRPV6

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）

ISSN： 1422-0067

年卷期： 2016 年 17 卷 7 期

页码：

收录情况： SCI

摘要： Stanniocalcin-1 (STC1) is a calcium and phosphate regulatory hormone. However, the exact molecular mechanisms underlying how STC1 affects Ca2+ uptake remain unclear. Here, the expression levels of the calcium transport proteins involved in transcellular transport in Caco2 cells were examined following over-expression or inhibition of STC1. These proteins include the transient receptor potential vanilloid members (TRPV) 5 and 6, the plasma membrane calcium ATPase 1b (PMCA1b), the sodium/calcium exchanger (NCX1), and the vitamin D receptor (VDR). Both gene and protein expressions of TRPV5 and TRPV6 were attenuated in response to over-expression of STC1, and the opposite trend was observed in cells treated with siRNA(STC1). To further investigate the ability of STC1 to influence TRPV6 expression, cells were treated with 100 ng/mL of recombinant human STC1 (rhSTC1) for 4 h following pre-transfection with siRNA(STC1) for 48 h. Intriguingly, the increase in the expression of TRPV6 resulting from siRNA(STC1) was reversed by rhSTC1. No significant effect of STC1 on the expression of PMCA1b, NCX1 or VDR was observed in this study. In conclusion, the effect of STC1 on calcium transport in intestinal epithelia is due to, at least in part, its negative regulation of the epithelial channels TRPV5/6 that mediate calcium influx.

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[1]Stanniocalcin-1 protects bovine intestinal epithelial cells from oxidative stress-induced damage. Wu, Li-ming,Hui, Lin,Xiang, Jing-mei,Wan, Chun-yun,Zou, Miao,Ma, Rui,Sun, Xiao-zhuan,Yang, Shi-jin,Guo, Ding-zong,Guo, Rui,Ye, Yong-gang.

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