title: Resistance to hypertension and high Cl-excretion in humans with SLC26A4 mutations.
abstract: Pendrin is a membrane transporter encoded by solute carrier family26A4 (SLC26A4). Mutations in this gene are known to cause hearing loss, and recent data from animal studies indicate a link between pendrin expression and hypertension; although, this association in humans is unclear. To clarify this issue, we investigated the influence of pendrin on blood pressure by analyzing demographic and biochemical data - including blood pressure and urinary electrolyte excretion - in patients with bi-allelic SLC26A4 mutations. Systolic and diastolic blood pressure and the left ventricular hypertrophy index were lower in subjects with pendrin mutations than in controls. In addition, fractional excretion of Na+and Cl-was increased and serum renin, angiotensin I and II levels were higher in subjects with pendrin mutations as compared to controls. Thus, patients with impaired pendrin function are likely to be resistant to high blood pressure due to enhanced urinary Na+/Cl-excretion. These results suggest that pendrin may regulate blood pressure through increased urinary salt excretion.
authors.affiliation: Department of Otorhinolaryngology-Head and Neck Surgery, Soonchunhyang University, College of Medicine, Bucheon, Korea.
authors.forename: B G
authors.initials: BG
authors.lastname: Kim
authors.affiliation: Department of Internal Medicine, Yonsei University, College of Medicine, Seoul, Korea.
authors.forename: T-H
authors.initials: TH
authors.lastname: Yoo
authors.affiliation: Department of Otorhinolaryngology, Yonsei University, College of Medicine, Seoul, Korea.
authors.forename: J-E
authors.initials: JE
authors.lastname: Yoo
authors.affiliation: Department of Otorhinolaryngology, Yonsei University, WonJu College of Medicine, Wonju, Korea.
authors.forename: Y J
authors.initials: YJ
authors.lastname: Seo
authors.affiliation: Department of Otorhinolaryngology, Yonsei University, College of Medicine, Seoul, Korea.
authors.forename: J
authors.initials: J
authors.lastname: Jung
authors.affiliation: Department of Otorhinolaryngology, Yonsei University, College of Medicine, Seoul, Korea.
authors.forename: J Y
authors.initials: JY
authors.lastname: Choi
mesh_terms: D000293:Adolescent; D000328:Adult; D000803:Angiotensin I / Q000097:blood; D000804:Angiotensin II / Q000097:blood; D000818:Animals; D001794:Blood Pressure / Q000235:genetics*; D002712:Chlorides / Q000652:urine; D004573:Electrolytes / Q000652:urine; D005260:Female; D006801:Humans; D006973:Hypertension / Q000097:blood / Q000235:genetics* / Q000503:physiopathology / Q000652:urine; D017379:Hypertrophy, Left Ventricular / Q000097:blood / Q000235:genetics* / Q000503:physiopathology / Q000652:urine; D008297:Male; D026901:Membrane Transport Proteins / Q000096:biosynthesis / Q000235:genetics*; D009154:Mutation; D012083:Renin / Q000097:blood; D012964:Sodium / Q000652:urine; D000076988:Sulfate Transporters; D055815:Young Adult
chemical_list: D002712:Chlorides; D004573:Electrolytes; D026901:Membrane Transport Proteins; C085609:SLC26A4 protein, human; D000076988:Sulfate Transporters; D000804:Angiotensin II; D000803:Angiotensin I; D012964:Sodium; D012083:Renin
keywords: SLC26A4; blood pressure; electrolyte; hypertension; pendrin; urine