Effects and mechanisms of calycosin on endothelial differentiation of human induced pluripotent stem cells

doi:10.12307/2024.167

Abstract

Abstract: BACKGROUND: Endothelial injury is one of the causes of cardiovascular diseases. Human induced pluripotent stem cells are easy to obtain, have strong differentiation ability, and have less exclusiveness, and their endothelial differentiated cells can be used as ideal cells for cardiovascular disease research.
OBJECTIVE: To investigate the effect and mechanism of calycosin on endothelial differentiation of human induced pluripotent stem cells and to provide technical support for microvascular regeneration.
METHODS: Human induced pluripotent stem cells were divided into control group and calycosin group (1.25, 2.5 μg/mL), and growth factors were added to induce single-layer endothelial differentiation. After the induction of differentiation for 8 days, the positive rate of endothelial cell marker CD144 was detected by flow cytometry. Fluorescent expressions of CD144 and CD31 were detected by the immunofluorescence method. Lentivirus RNAi GFP puromycin was used to silence human-induced pluripotent stem cell Piezo1 mRNA followed by endothelial directed differentiation. After 8 days of differentiation, the positive rate of CD144 in differentiated cells was detected by flow cytometry. The mRNA expression levels of CD144, Piezo1 and MEK were detected by qPCR.
RESULTS AND CONCLUSION: (1) Compared with the control group, the positive rate of CD144 was significantly increased in the 1.25 and 2.5 μg/mL calycosin groups (P < 0.05). The expressions of CD144, Piezo1, and MEK mRNA were increased in the 2.5 μg/mL calycosin group (P < 0.05). The fluorescence expressions of CD144 (P < 0.01) and CD31 (P < 0.001) were significantly increased in the 2.5 μg/mL calycosin group. (2) Compared with the shNT group, CD144 positive rate and CD144, Piezo1, MEK mRNA expressions were significantly increased in the shNT + calycosin 1.25, 2.5 μg/mL groups (P < 0.05). Compared with the shPiezo1 group, the positive rate of CD144 and mRNA expressions of CD144, Piezo1 and MEK had no significant changes in the shPiezo1+calycosin 1.25, 2.5 μg/mL groups (P > 0.05). (3) It is concluded that 2.5 μg/mL calycosin promotes the differentiation of human-induced pluripotent stem cells into endothelial lineages. Calycosin promotes the downstream MEK expression, thereby promoting the endothelial differentiation of human induced pluripotent stem cells by targeting the expression level of Piezo1.

Key words: calycosin, human induced pluripotent stem cell, endothelial cell, endothelial differentiation

CLC Number:

Cui Shengnan, Liu Chuanguo, Yang Wenqing, Zheng Zhijuan, Zhang Dan. Effects and mechanisms of calycosin on endothelial differentiation of human induced pluripotent stem cells[J]. Chinese Journal of Tissue Engineering Research, 2024, 28(19): 3031-3036.

Figures/Tables 8

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