title: CYP3A5 and ABCB1 genes influence blood pressure and response to treatment, and their effect is modified by salt.
abstract: The permeability-glycoprotein efflux-transporter encoded by the multidrug resistance 1 (ABCB1) gene and the cytochromes P450 3A4/5 encoded by the CYP3A4/5 genes are known to interact in the transport and metabolism of many drugs. Recent data have shown that the CYP3A5 genotypes influence blood pressure and that permeability-glycoprotein activity might influence the activity of the renin-angiotensin system. Hence, these 2 genes may contribute to blood pressure regulation in humans. We analyzed the association of variants of the ABCB1 and CYP3A5 genes with ambulatory blood pressure, plasma renin activity, plasma aldosterone, endogenous lithium clearance, and blood pressure response to treatment in 72 families (373 individuals; 55% women; mean age: 46 years) of East African descent. The ABCB1 and CYP3A5 genes interact with urinary sodium excretion in their effect on ambulatory blood pressure (daytime systolic: P=0.05; nighttime systolic and diastolic: P<0.01), suggesting a gene-gene-environment interaction. The combined action of these genes is also associated with postproximal tubular sodium reabsorption, plasma renin activity, plasma aldosterone, and with an altered blood pressure response to the angiotensin-converting enzyme inhibitor lisinopril (P<0.05). This is the first reported association of the ABCB1 gene with blood pressure in humans and demonstration that genes encoding for proteins metabolizing and transporting drugs and endogenous substrates contribute to blood pressure regulation.
authors: Unité de Biochimie et Psychopharmacologie Clinique, Centre des Neurosciences Psychiatriques, Département de Psychiatrie-Centre Hospitalier Universitaire Vaudois, Prilly, Switzerland.
authors: Chin B
authors: CB
authors: Eap
authors: Murielle
authors: M
authors: Bochud
authors: Robert C
authors: RC
authors: Elston
authors: Pascal
authors: P
authors: Bovet
authors: Marc P
authors: MP
authors: Maillard
authors: Juerg
authors: J
authors: Nussberger
authors: Laurent
authors: L
authors: Schild
authors: Conrad
authors: C
authors: Shamlaye
authors: Michel
authors: M
authors: Burnier
mesh_terms: D018435:ATP Binding Cassette Transporter, Subfamily B; D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D000042:Absorption; D000328:Adult; D000450:Aldosterone / Q000097:blood; D000806:Angiotensin-Converting Enzyme Inhibitors / Q000627:therapeutic use*; D001794:Blood Pressure / Q000187:drug effects / Q000235:genetics*; D018660:Blood Pressure Monitoring, Ambulatory; D051544:Cytochrome P-450 CYP3A; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics*; D005260:Female; D006801:Humans; D006973:Hypertension / Q000188:drug therapy / Q000503:physiopathology*; D007687:Kidney Tubules, Proximal / Q000378:metabolism; D017706:Lisinopril / Q000627:therapeutic use*; D008094:Lithium / Q000493:pharmacokinetics; D008297:Male; D008875:Middle Aged; D009318:Natriuresis / Q000235:genetics; D027361:Organic Anion Transporters / Q000235:genetics*; D012083:Renin / Q000097:blood; D012965:Sodium Chloride / Q000494:pharmacology
chemical_list: C513055:ABCB1 protein, human; D018435:ATP Binding Cassette Transporter, Subfamily B; D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D000806:Angiotensin-Converting Enzyme Inhibitors; D027361:Organic Anion Transporters; D012965:Sodium Chloride; D000450:Aldosterone; D003577:Cytochrome P-450 Enzyme System; D008094:Lithium; D017706:Lisinopril; C510164:CYP3A5 protein, human; D051544:Cytochrome P-450 CYP3A; D012083:Renin