|
KMID : 0620920200520040006
|
|
Experimental & Molecular Medicine
2020 Volume.52 No. 4 p.6 ~ p.6
|
|
|
Pharmacological inhibition of mTOR attenuates replicative cell senescence and improves cellular function via regulating the STAT3-PIM1 axis in human cardiac progenitor cells
|
|
Park Ji-Hye
Lee Na-Kyoung
Lim Hye-Ji
Ji Seung-Taek
Kim Yeon-Ju
Jang Woong-Bi
Kim Da-Yeon
Kang Song-Hwa
Yun Ji-Soo
Ha Jong-Seong
Kim Hyung-Tae
Lee Dong-Jun
Baek Sang-Hong
Kwon Sang-Mo
|
|
|
Abstract
|
|
|
|
The mammalian target of rapamycin (mTOR) signaling pathway efficiently regulates the energy state of cells and maintains tissue homeostasis. Dysregulation of the mTOR pathway has been implicated in several human diseases. Rapamycin is a specific inhibitor of mTOR and pharmacological inhibition of mTOR with rapamycin promote cardiac cell generation from the differentiation of mouse and human embryonic stem cells. These studies strongly implicate a role of sustained mTOR activity in the differentiating functions of embryonic stem cells; however, they do not directly address the required effect for sustained mTOR activity in human cardiac progenitor cells. In the present study, we evaluated the effect of mTOR inhibition by rapamycin on the cellular function of human cardiac progenitor cells and discovered that treatment with rapamycin markedly attenuated replicative cell senescence in human cardiac progenitor cells (hCPCs) and promoted their cellular functions. Furthermore, rapamycin not only inhibited mTOR signaling but also influenced signaling pathways, including STAT3 and PIM1, in hCPCs. Therefore, these data reveal a crucial function for rapamycin in senescent hCPCs and provide clinical strategies based on chronic mTOR activity.
|
|
|
KEYWORD
|
|
|
Adult stem cells, Heart stem cells
|
|
|
FullTexts / Linksout information
|
|
|
|
|
Listed journal information
|
|
    
|