[Long noncoding RNA H19 promotes vascular calcification by repressing the Bax inhibitor 1/optic atrophy 1 pathway]

Area of Science:

• Molecular Biology
• Cardiovascular Research
• Cell Biology

Context:

• Vascular calcification is a significant risk factor for cardiovascular disease.
• The role of long noncoding RNAs (lncRNAs) in vascular calcification is an emerging area of research.
• The Bax inhibitor 1/optic atrophy 1 (BI-1/OPA1) pathway's involvement in vascular health requires further elucidation.

Purpose:

• To determine if long noncoding RNA H19 (lncRNA H19) promotes vascular calcification.
• To investigate the mechanisms by which lncRNA H19 influences calcium deposition, osteogenic differentiation, and apoptosis.
• To explore the role of the BI-1/OPA1 pathway in lncRNA H19-mediated vascular calcification.

Summary:

• lncRNA H19 expression is upregulated in calcified vascular smooth muscle cells (VSMCs).
• Downregulation of lncRNA H19 reduces calcification, osteogenic markers (Runx-2, BMP-2), and apoptosis in VSMCs.
• lncRNA H19 inhibition ameliorates vascular calcification in a diabetic mouse model by upregulating BI-1 and OPA1.
• Knockdown of BI-1 or OPA1 reverses the protective effects of siH19, indicating their crucial role in the pathway.

Impact:

• This study identifies lncRNA H19 as a key mediator of vascular calcification.
• The findings suggest that targeting lncRNA H19 and the BI-1/OPA1 pathway could be a novel therapeutic approach for vascular calcification.
• Understanding this molecular mechanism provides new insights into the pathogenesis of vascular calcification.