Characterization of calcium signaling pathways in human preadipocytes
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Characterization of calcium signaling pathways in human preadipocytes
- 发表刊物：
- J Cell Physiol
- 摘要：
- Intracellular free Ca2+ (Ca(i)2+) is an important regulator of many cellular activities; however, Ca2+ signaling is not well studied in human preadipocytes. The purpose of the present study was to characterize Ca2+ signal pathways using a confocal scanning technique and RT-PCR. It was found that spontaneous Ca(i)2+ oscillations were observed in 12.1% preadipocytes, and number of cells with Ca2+ oscillations was increased to 47.9% by 1% fetal bovine serum. Ca(i)2+ oscillations were dependent on Ca2+ entry mainly via stored-operated Ca2+ (SOC) entry. They were suppressed by the SOC entry channel blocker La3+, the phospholipase C (PLC) inhibitor U73122, the inositol trisphosphate receptor (IP3R) blocker 2-amino-ethoxydiphenyl borate, or the sarcoplasmic/endoplasmic reticulum Ca2+ pump (SERCA) inhibitors thapsigargin and cyclopiazonic acid, but not by ryanodine. The IP3R activator thimerosal increased Ca(i)2+ oscillations. In addition, the plasma membrane Ca2+ pump (PMCA) inhibitor carboxyeosin and Na+--Ca2+ exchanger (NCX) inhibitor Ni2+ both suppressed Ca2+ oscillations. RT-PCR revealed that the mRNAs for IP3R1-3, SERCA1,2, NCX3 and PMCA1,3,4, Ca(V)1.2, and TRPC1,4,6, STIM1 and Orai1 (for SOC entry channels) were significant in human preadipocytes. The present study demonstrates that multiple Ca2+ signal pathways are present in human preadipocytes, and provides a basis for investigating how Ca2+ signals regulate biological and physiological activities of human preadipocytes.
- 合写作者：
- Hu R, He ML, Hu H, Yuan BX, Zang WJ, et al
- 卷号：
- 220(3)
- 页面范围：
- 765-70
- 是否译文：
- 否
- 发表时间：
- 2009-05-27