Circular RNA hsa_circ_0003575 regulates oxLDL induced vascular endothelial cells proliferation and angiogenesis

Area of Science:

• Molecular Biology
• Cardiovascular Research
• Genomics

Background:

• Circular RNAs (circRNAs) are covalently closed RNA molecules with emerging roles in cellular regulation.
• Dysregulation of circRNAs is implicated in cardiovascular diseases like atherosclerosis.
• Oxidized low-density lipoprotein (oxLDL) is a key factor in endothelial cell dysfunction during atherosclerosis.

Purpose of the Study:

• To investigate the circRNA expression profile in oxLDL-induced human umbilical vein endothelial cells (HUVECs).
• To identify specific circRNAs involved in endothelial cell responses to oxLDL.
• To elucidate the functional role of identified circRNAs in atherosclerosis pathogenesis.

Main Methods:

• Human circRNA microarray analysis to screen differentially expressed circRNAs.
• Validation of specific circRNAs using quantitative methods.
• Loss-of-function experiments to assess the impact of circRNA silencing on HUVEC function.
• Bioinformatic analysis to predict circRNA-miRNA-mRNA interactions.

Main Results:

• Microarray analysis identified 943 differentially expressed circRNAs (2-fold change) in oxLDL-treated HUVECs.
• Hsa_circ_0003575 was significantly upregulated in oxLDL-induced HUVECs.
• Silencing of hsa_circ_0003575 enhanced HUVEC proliferation and angiogenesis.
• Predicted circRNA-miRNA-mRNA networks provide insights into hsa_circ_0003575 regulatory mechanisms.

Conclusions:

• CircRNA expression profiling reveals significant alterations in HUVECs exposed to oxLDL.
• Hsa_circ_0003575 plays a crucial role in promoting HUVEC proliferation and angiogenesis.
• Hsa_circ_0003575 represents a potential therapeutic target for vascular endothelial cell injury in atherosclerosis.