Substance P enhances the local activation of NK 1 R-expressing c-kit + cardiac progenitor cells in right atrium of ischemia/reperfusion-injured heart

BMC Molecular and Cell Biology

article

Jeong, Yun-Mi¹  Cheng, Xian Wu³  Lee, Kyung Hye¹  Lee, Sora¹  Cho, Haneul¹  Kim, Weon¹ 

[1] Division of Cardiology, Department of Internal Medicine, Kyung Hee University Hospital, Kyung Hee University;Department of Mechanical Engineering, Korea Polytechnic University;The Department of Cardiology, Yanbian University Hospital

关键词: Substance P;    Ischemia-reperfusion;    C-kit + cardiac progenitor cells;    Neurokinin 1 receptor;    right atrium;   

DOI  :  10.1186/s12860-020-00286-x

学科分类：内科医学

来源: Colegio Oficial de Psicologos

【 摘 要 】

Localization of neurokinin 1 receptor (NK1R), the endogenous receptor for neuropeptide substance P (SP), has already been described for the right atrium (RA) of the heart. However, the biological role of SP/NK1R signal pathways in the RA remains unclear. Sprague-Dawley rats were randomly divided into 4 groups (n = 22 each); subjected to sham, ischemia/reperfusion-injury (I/R), I/R with 5 nmole/kg SP injection (SP + I/R), and SP + I/R with 1 mg/kg RP67580 injection (RP, a selective non-peptide tachykinin NK1R antagonist) (RP/SP + I/R). The left anterior descending coronary artery was occluded for 40 min followed by 1 day reperfusion with SP or SP + RP or without either. After 1 day, both atria and ventricles as well as the heart apexes were collected. SP promoted the expression of c-Kit, GATA4, Oct4, Nanog, and Sox2 in only the RA of the SP + I/R rats via NK1R activation. In agreement with these observations, NK1R-expressing c-Kit+ Nkx2.5+GATA4+ cardiac progenitor cells (CPCs) in the ex vivo RA explant outgrowth assay markedly migrated out from RA1 day SP + I/R approximately 2-fold increase more than RA1 day I/R. Treatment of SP promoted proliferation, migration, cardiosphere formation, and potential to differentiate into cardiomyocytes. Using RP inhibitor, NK1R antagonist not only inhibited cell proliferation and migration but also reduced the formation of cardiosphere and differentiation of c-Kit+ CPCs. SP/NK1R might play a role as a key mediator involved in the cellular response to c-Kit+ CPC expansion in RA of the heart within 24 h after I/R.

【 授权许可】

CC BY|CC0