Evidence for a Causal Role of the SH2B3-β2M Axis in Blood Pressure Regulation
2019
Genetic variants at SH2B3 are associated with blood pressure and circulating β2M (β-2 microglobulin), a well-characterized kidney filtration biomarker. We hypothesize that circulating β2M is an independent risk predictor of hypertension and may causally contribute to its development. The study sample consisted of 7 065 Framingham Heart Study participants with measurements of plasma β2M. Generalized estimating equations were used to test the association of β2M with prevalent and new-onset hypertension. There were 2 145 (30%) cases of prevalent hypertension at baseline and 886 (21%) cases of incident hypertension during 6 years of follow-up. A 1-SD increase in baseline plasma β2M was associated with a greater risk of prevalent (odds ratio 1.14, 95% CI 1.05–1.24) and new-onset (odds ratio 1.18, 95% CI 1.07–1.32) hypertension. Individuals within the top β2M quartile had a greater risk than the bottom quartile for prevalent (odds ratio 1.29, 95% CI 1.05−1.57) and new-onset (odds ratio 1.59, 95% CI 1.20–2.11) h...
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