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A rare genetic variant of BPIFB4 predisposes to high blood pressure via impairment of nitric oxide signaling #MMPMID28852218
Vecchione C; Villa F; Carrizzo A; Spinelli CC; Damato A; Ambrosio M; Ferrario A; Madonna M; Uccellatore A; Lupini S; Maciag A; Ryskalin L; Milanesi L; Frati G; Sciarretta S; Bellazzi R; Genovese S; Ceriello A; Auricchio A; Malovini A; Puca AA
Sci Rep 2017[]; 7 (ä): ä PMID28852218show ga
BPIFB4 is associated with exceptional longevity: four single-nucleotide polymorphisms distinguish the wild-type form from a longevity-associated variant conferring positive effects on blood pressure. The effect of a rare variant (RV; allele frequency, 4%) on blood pressure is unknown. Here, we show that overexpression of RV-BPIFB4 in ex-vivo mouse vessels impairs phosphorylation of endothelial nitric oxide synthase (eNOS), blunting acetylcholine-evoked vasorelaxation; in vivo, virally mediated overexpression of RV-BPIFB4 increases blood pressure, an action absent in eNOS-deficient mice. In humans, we found RV carriers to have increased diastolic blood pressure, a finding that was more marked in subjects on anti-hypertensive medication; moreover, recombinant RV-BPIFB4 protein impaired eNOS function in ex-vivo human vessels. Thus, RV-BPIFB4 acts directly on blood pressure homeostasis and may represent a novel biomarker of vascular dysfunction and hypertension.