例如:"lncRNA", "apoptosis", "WRKY"

hsa-miR-766-5p as a new regulator of mitochondrial apoptosis pathway for discriminating of cell death from cardiac differentiation.

Gene. 2020 Apr 30;736:144448. Epub 2020 Feb 04
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摘要


Dispose of unnecessary cells in multicellular organism take place through apoptosis as a mode of programmed cell death (PCD). This process is triggered through two main pathway including extrinsic pathway or death receptor pathway and intrinsic or mitochondrial pathway. An alternative role for mitochondrial pathway of cell death is its involvement in cell differentiation. Biochemistry of cell differentiation indicates a common origin for differentiation and apoptosis. miRNAs are a group of small non coding mediator RNAs in regulation of many routes such as apoptosis and differentiation. By using bioinformatics tools hsa-miR-766-5p was predicted to target the BAX, BAK and BOK genes involved in mitochondrial apoptosis pathway. RT-qPCR and dual luciferase assay showed targeting of BAX, BAK and BOK 3'UTRs via hsa-miR-766, detected in SW480 and HEK293T cell lines. Caspases 3/7 and 9 activity assay revealed the involvement of hsa-miR-766-5p in mitochondrial apoptosis pathway regulation detected following overexpression and downregulation of this miRNA, detected in SW480 cells treated with 1 μM doxorubicin. Flow cytometry and MTT assay indicated cell death reduction and viability elevation effect of hsa-miR-766 in SW480 cells after its overexpression. Endogenous expression of hsa-miR-766 during the course of human embryonic stem cells (hESCs) differentiation into cardiomyocytes revealed an inverse expression status of this miRNA with BOK. However, the expression of this miRNA was inversely related to BAX and BAK for some time points of differentiation. Overall this results show the involvement of hsa-miR-766 in regulation of mitochondrial apoptosis pathway.

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