Regulatory Roles of Long Noncoding RNAs in Arterial Stiffness and Hypertension

Area of Science:

• Genomics and Molecular Biology
• Cardiovascular Research
• Transcriptomics

Background:

• Arterial stiffness, measured by pulse wave velocity (PWV), is a key risk factor for cardiovascular disease and hypertension.
• African Americans exhibit a disproportionately high prevalence of hypertension.
• Long noncoding RNAs (lncRNAs) are increasingly recognized for their regulatory roles in complex diseases.

Purpose of the Study:

• To investigate the regulatory roles of lncRNAs in modulating messenger RNAs (mRNAs) associated with arterial stiffness and hypertension.
• To identify specific lncRNA-mRNA interactions in the context of cardiovascular health.
• To focus on the African American population, which is heavily impacted by hypertension.

Main Methods:

• Utilized whole-blood transcriptome sequencing data from two African American cohorts (GENE-FORECAST and MH-GRID).
• Identified differentially expressed lncRNAs and mRNAs between high and low PWV groups.
• Determined lncRNA-mRNA associations and linked them to hypertension status, with validation across cohorts.

Main Results:

• Discovered 1035 mRNAs and 31 lncRNAs differentially expressed in relation to PWV.
• Identified significant interactions between 31 lncRNAs and 1034 mRNAs.
• Found 22 lncRNA-modulated mRNAs associated with hypertension, with 30 lncRNAs linked to UCP2 expression.

Conclusions:

• lncRNAs play a significant role in regulating gene expression pertinent to arterial stiffness and hypertension.
• The identified lncRNA-mRNA interactions, particularly involving UCP2, provide insights into molecular mechanisms of arterial stiffness.
• These findings contribute to understanding the genetic underpinnings of hypertension in African Americans.