Key result
Genetic variation in the ASTN2 locus was associated with blood pressure, obesity, and psychiatric traits, demonstrating pleiotropic effects rather than shared pathology.
Why the study?
Recent research highlights shared biological mechanisms between cardiometabolic and psychiatric illness, and the ASTN2 locus has been implicated in both, prompting a systematic investigation of its genetic architecture across these traits.
Does genetic variation in the ASTN2 locus contribute to shared biology between cardiometabolic and psychiatric traits?
Observational (n=402,111)
Does genetic variation in the ASTN2 locus contribute to shared biology between cardiometabolic and psychiatric traits?
Genetic variation in the ASTN2 locus has independent pleiotropic effects on cardiometabolic and psychiatric traits rather than contributing to shared pathology.
Answers are grounded in this paper and cite their sources.
ASTN2 variants may exert independent pleiotropic effects; leaves open shared biology between cardiometabolic and psychiatric traits.
Background: The link between cardiometabolic and psychiatric illness has long been attributed to human behaviour, however recent research highlights shared biological mechanisms. The ASTN2 locus has been previously implicated in psychiatric and cardiometabolic traits, therefore this study aimed to systematically investigate the genetic architecture of ASTN2 in relation to a wide range of relevant traits. Methods: Baseline questionnaire, assessment and genetic data of 402111 unrelated white British ancestry individuals from the UK Biobank was analysed. Genetic association analyses were conducted using PLINK 1.07, assuming an additive genetic model and adjusting for age, sex, genotyping chip, and population structure. Conditional analyses and linkage disequilibrium assessment were used to determine whether cardiometabolic and psychiatric signals were independent. Results: Associations between genetic variants in the ASTN2 locus and blood pressure, total and central obesity, neuroticism, anhedonia and mood instability were identified. All analyses support the independence of the cardiometabolic traits from the psychiatric traits. In silico analyses provide support for the central obesity signal acting through ASTN2, however most of the other signals are likely acting through other genes in the locus. Conclusions: Our systematic analysis demonstrates that ASTN2 has pleiotropic effects on cardiometabolic and psychiatric traits, rather than contributing to shared pathology.
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Burt et al. (2021) conducted an observational in Cardiometabolic and psychiatric traits (n=402,111). Genetic variation in the ASTN2 locus was evaluated on Association between genetic variants in the ASTN2 locus and cardiometabolic and psychiatric traits. Genetic variation in the ASTN2 locus was associated with blood pressure, obesity, and psychiatric traits, demonstrating pleiotropic effects rather than shared pathology.
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