Blood transcriptomic signature associated with hypertension in females across two human cohorts
Yang, C.; Lu, J.; Pretorius, T.; Camargo Tavares, L.; Marques, F. Z.
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Background: Hypertension prevalence rises sharply in females after menopause, exceeding that of age-matched males in later life, conferring greater relative cardiovascular disease risk in females than in males. However, the underlying mechanisms remain poorly understood. Method: We studied multi-tissue RNA-sequencing data from 193 CVD-free participants aged >55 years in the GTEx database and extended the findings to 1,605 age-matched Framingham Heart Study participants. Results: We identified a dominant female hypertension co-expression signature in blood, expressed at lower levels in females with uncontrolled high blood pressure than in males (sex-by-hypertension interaction) in both cohorts. Genes contributing to this signature were enriched for post-transcriptional modification and insulin signalling and regulated by ETS family transcription factors (TFs). Ten ETS TFs showed the same female-specific hypertension association and together explained the signature?s expression. Moreover, in females, but not males, lower blood signature scores were associated with a pro-inflammatory transcriptome in the artery and kidneys. Conclusions: Collectively, we identified the ETS-transcriptomic axis as a potential mechanism explaining sex differences in human hypertension.
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