Cardioprotective effects of genetically engineered cardiac stem cells by spheroid formation on ischemic cardiomyocytes.
Mol Med
; 26(1): 15, 2020 01 31.
Article
em En
| MEDLINE
| ID: mdl-32005100
ABSTRACT
BACKGROUND:
Sca-1+ cardiac stem cells and their limited proliferative potential were major limiting factors for use in various studies.METHODS:
Therefore, the effects of sphere genetically engineered cardiac stem cells (S-GECS) inserted with telomerase reverse transcriptase (TERT) were investigated to examine cardiomyocyte survival under hypoxic conditions. GECS was obtained from hTERT-immortalized Sca-1+ cardiac stem cell (CSC) lines, and S-GECS were generated using poly-HEMA.RESULTS:
The optimal conditions for S-GECS was determined to be 1052 GECS cells/mm2 and a 48 h culture period to produce spheroids. Compared to adherent-GECS (A-GECS) and S-GECS showed significantly higher mRNA expression of SDF-1α and CXCR4. S-GECS conditioned medium (CM) significantly reduced the proportion of early and late apoptotic cardiomyoblasts during CoCl2-induced hypoxic injury; however, gene silencing via CXCR4 siRNA deteriorated the protective effects of S-GECS against hypoxic injury. As downstream pathways of SDF-1α/CXCR4, the Erk and Akt signaling pathways were stimulated in the presence of S-GECS CM. S-GECS transplantation into a rat acute myocardial infarction model improved cardiac function and reduced the fibrotic area. These cardioprotective effects were confirmed to be related with the SDF-1α/CXCR4 pathway.CONCLUSIONS:
Our findings suggest that paracrine factors secreted from transplanted cells may protect host cardiomyoblasts in the infarcted myocardium, contributing to beneficial left ventricle (LV) remodeling after acute myocardial infarction (AMI).Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Células-Tronco
/
Telomerase
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Esferoides Celulares
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Miócitos Cardíacos
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Ataxina-1
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article