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01-12-2022 | Research article

Variability in newborn telomere length is explained by inheritance and intrauterine environment

Authors: Li Chen, Karen Mei Ling Tan, Min Gong, Mary F. F. Chong, Kok Hian Tan, Yap Seng Chong, Michael J. Meaney, Peter D. Gluckman, Johan G. Eriksson, Neerja Karnani

Published in: BMC Medicine | Issue 1/2022

Abstract

Background

Telomere length (TL) and its attrition are important indicators of physiological stress and biological aging and hence may vary among individuals of the same age. This variation is apparent even in newborns, suggesting potential effects of parental factors and the intrauterine environment on TL of the growing fetus.

Methods

Average relative TLs of newborns (cord tissue, N = 950) and mothers (buffy coat collected at 26–28 weeks of gestation, N = 892) were measured in a birth cohort. This study provides a comprehensive analysis of the effects of heritable factors, socioeconomic status, and in utero exposures linked with maternal nutrition, cardiometabolic health, and mental well-being on the newborn TL. The association between maternal TL and antenatal maternal health was also studied.

Results

Longer maternal TL (β = 0.14, P = 1.99E−05) and higher paternal age (β = 0.10, P = 3.73E−03) were positively associated with newborn TL. Genome-wide association studies on newborn and maternal TLs identified 6 genetic variants in a strong linkage disequilibrium on chromosome 3q26.2 (Tag SNP-LRRC34-rs10936600: P_meta = 5.95E−08). Mothers with higher anxiety scores, elevated fasting blood glucose, lower plasma insulin-like growth factor-binding protein 3 and vitamin B12 levels, and active smoking status during pregnancy showed a higher risk of giving birth to offspring with shorter TL. There were sex-related differences in the factors explaining newborn TL variation. Variation in female newborn TL was best explained by maternal TL, mental health, and plasma vitamin B12 levels, while that in male newborn TL was best explained by paternal age, maternal education, and metabolic health. Mother’s TL was associated with her own metabolic health and nutrient status, which may have transgenerational effects on offspring TL.

Conclusions

Our findings provide a comprehensive understanding of the heritable and environmental factors and their relative contributions to the initial setting of TL and programing of longevity in early life. This study provides valuable insights for preventing in utero telomere attrition by improving the antenatal health of mothers via targeting the modifiable factors.

Trial registration

ClinicalTrials.gov, NCT01174875. Registered on 1 July 2010

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Title: Variability in newborn telomere length is explained by inheritance and intrauterine environment
Authors: Li Chen
Karen Mei Ling Tan
Min Gong
Mary F. F. Chong
Kok Hian Tan
Yap Seng Chong
Michael J. Meaney
Peter D. Gluckman
Johan G. Eriksson
Neerja Karnani
Publication date: 01-12-2022
Publisher: BioMed Central
Published in: BMC Medicine / Issue 1/2022
Electronic ISSN: 1741-7015
DOI: https://doi.org/10.1186/s12916-021-02217-9

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Variability in newborn telomere length is explained by inheritance and intrauterine environment

Abstract

Background

Methods

Results

Conclusions

Trial registration

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

Background

Methods

Results

Conclusions

Trial registration

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