Association between left ventricular mass and telomere length in a population study

Area of Science:

• Cardiology
• Genetics
• Aging Research

Background:

• Telomere dynamics are implicated in cardiomyocyte size and replication.
• Shorter telomeres are associated with reduced proliferation and increased apoptosis in cardiomyocytes.

Purpose of the Study:

• To investigate the association between telomere length (TL) and left ventricular (LV) mass in a general population.
• To determine if TL influences cardiac structure, specifically LV mass.

Main Methods:

• Quantitative polymerase chain reaction (qPCR) was used to measure TL in leukocytes from 334 Flemish participants.
• Telomere length was expressed as the telomere/genomic DNA ratio (T/S).
• Left ventricular mass was assessed by echocardiography after a median follow-up of 7.4 years.

Main Results:

• Multivariable-adjusted analyses revealed a significant positive association between mean leukocyte TL and LV mass and LV mass index.
• A 1-standard-deviation increase in T/S ratio correlated with a 5.20 g increase in LV mass (P = 0.003) and a 2.70 g/m² increase in LV mass index (P = 0.004) in all subjects.
• The association was stronger in normotensive subjects, with increases of 8.03 g in LV mass (P = 0.0001) and 3.74 g/m² in LV mass index (P = 0.0007).
• Associations were also found with LV wall thicknesses but not LV internal diameter in normotensive individuals.

Conclusions:

• Longer mean leukocyte telomere length is associated with increased left ventricular mass.
• This relationship is particularly evident in normotensive individuals.
• The findings suggest a potential biological link between telomere length and cardiomyocyte size/replication, influencing cardiac structure.