Capsaicin partially mimics heat in mouse fibroblast cells in vitro

详细信息    查看全文

• 作者：Naotoshi Sugimoto ; Masanori Katakura…
• 关键词：Capsaicin ; Heat ; Temperature sense ; TRP family ; Tolerance
• 刊名：Naunyn-Schmiedeberg's Archives of Pharmacology
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：390
• 期：3
• 页码：281-289
• 全文大小：
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Pharmacology/Toxicology; Neurosciences;
• 出版者：Springer Berlin Heidelberg
• ISSN：1432-1912
• 卷排序：390

文摘

Capsaicin activates transient receptor potential vanilloid 1 (TRPV1), a cation channel in the transient receptor potential family, resulting in the transient entry of Ca2+ and Mg2+ and a warm sensation. However, the effects of capsaicin on cells have not fully elucidated in fibroblasts. In this study, we investigated whether capsaicin could induce signal transduction in mouse fibroblast cells and compared the effect with that of heat-induced signal transduction. The activation of the mitogen-activated protein kinases (MAPKs) ERK and p38 MAPK, expression levels of heat shock protein 70 (HSP70) and HSP90, actin assembly, and cell proliferation were analyzed in NIH3T3 mouse fibroblast cells. A 15-min stimulation with capsaicin (∼100 μM) phosphorylated ERK and p38 MAPK and induced actin assembly. A 2-day stimulation with capsaicin increased the level of HSP70, but not HSP90, and the 2-day stimulation with capsaicin (∼100 μM) did not affect cell proliferation. A 15-min exposure to moderate heat (39.5 °C) phosphorylated both ERK and p38 MAPK and induced actin assembly to similar degrees as stimulation with capsaicin. A 2-day exposure to moderate heat increased the levels of both HSP70 and HSP90 and prevented cell proliferation. However, the 2-day stimulation with capsaicin (100 μM) failed to prevent heat shock-induced cell death. Thus, our results suggest that the effects of capsaicin on fibroblast cells partially differ from those of heat. Notably, the 2-day stimulation with capsaicin was not sufficient to develop heat tolerance in fibroblast cells.