Differential long noncoding RNA profiling of BMI in twins

Area of Science:

• Epigenetics
• Genomics
• Human Physiology

Background:

• Genetic variants are extensively studied for BMI association.
• Epigenetic regulation, particularly via long noncoding RNAs (lncRNAs), offers an alternative avenue for understanding BMI variation.

Purpose of the Study:

• To investigate the epigenetic contribution of lncRNAs to Body Mass Index (BMI) variation.
• To identify specific lncRNAs in whole blood whose expression is associated with BMI.

Main Methods:

• Analysis of lncRNA expression in whole blood from 229 monozygotic twin pairs.
• Utilized generalized estimating equations to assess the association between lncRNA expression and BMI.
• Applied false discovery rate (FDR) < 0.05 for significance threshold.

Main Results:

• Identified six significant lncRNA probes associated with BMI.
• Demonstrated a causal effect of BMI on the expression of these identified lncRNAs.
• Functional annotation linked differential lncRNA profiles to biological processes like kidney development and lipid metabolism.

Conclusions:

• Whole blood lncRNA expression is significantly responsive to BMI variations.
• lncRNAs represent a key epigenetic regulatory layer influenced by BMI.
• Findings suggest a role for lncRNAs in BMI-related physiological processes.