Piwi-interacting RNAs Play a Role in Vitamin C-mediated Effects on Endothelial Aging

Overview

Journal Int J Med Sci

Specialty General Medicine

Date 2020 Apr 21

PMID 32308548

Citations 8

Authors

Sulin Zheng

Haoxiao Zheng

Anqing Huang

Linlin Mai

Xiaohui Huang

Yunzhao Hu

Yuli Huang

Affiliations

Soon will be listed here.

Abstract

The underlying mechanisms that mediate the effects of vitamin C on endothelial cell aging are widely unknown. To investigate whether Piwi-interacting RNAs (piRNAs) are involved in this process, an endothelial aging model was induced using HO in human umbilical vein endothelial cells (HUVECs) and then treated with vitamin C (VC). Untreated HUVECs without HO exposure were used to serve as the negative control group. Cell cycle, cell viability, and aging-associated protein expression were assessed, and RNA sequencing was performed to reveal the piRNA profile. Functional and regulatory networks of the different piRNA target genes were predicted by the Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment and Gene Ontology (GO) analysis. HO induced G1 phase cell arrest, decreased cell viability, and upregulated the senescence marker p16 in HUVECs. We found that VC treatment inhibited G1 phase cell arrest, increased the number of cells in the S and G2/M phases, increased cell viability, and decreased p16 expression. The piRNA expression profiles revealed that a large proportion of piRNAs that were differentially expressed in HO-treated HUVECs were partly normalized by VC. Furthermore, a number of piRNAs associated with the response to VC in HO-treated HUVECs were linked with senescence and cell cycle-related pathways and networks. These results indicate that the ability of VC to attenuate HO-mediated endothelial cell senescence may be associated with changes in expression of piRNAs that are linked to the cell cycle.

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