Subclinical endothelial inflammation markers in a family with type i familial hyperaldosteronism caused by a de novo mutation Marcadores de inflamación endotelial subclínica en una familia con hiperaldosteronismo familiar tipo i por mutación de novo

Stehr C.B.; Carvajal C.A.; Mosso L.M.; Fardella C.E.; Lacourt, P; Cattani, A; Alcaino H; Mellado R.; Lavandero S.

Keywords: endothelium, blood, protein, vasculitis, stress, chain, markers, matrix, synthase, physiology, aldosterone, hyperaldosteronism, mutation, humans, human, male, genetics, polymerase, steroid, methodology, gelatinase, evaluation, female, article, marker, adolescent, paternity, vascular, monooxygenase, metalloproteinase, oxidative, c, 9, Reaction, biological, case, Reactive, Endothelium,, report, b, C-Reactive, 11beta, 11-beta-Hydroxylase

Abstract

Background: Type I familial hyperaldosteronism is caused by the presence of a chimaeric gene CYP11B1/CYP11B2 which encodes an enzyme with aldosterone synthetase activity regulated by a drenocorticotrophic hormone (ACTH). Therefore, in patients with FH-I is possible to normalize the aldosterone levels with glucocorticoid treatment. Recently it has been shown that aldosterone plays a role in the production of endothelial oxidative stress and subclinical inflammation. Aim: To evaluate subclinical endothelial inflammation markers, like Mtalloproteinase 9 (MMP-9) and ultrasensitive Creactive protein (usPCR), before and after glucocorticoid treatment in family members with FH-I caused by a de novo mutation. Patients and methods: We report three subjects with FH-I in a dngle family (proband, father and sister). We confirmed the presence of a chimaeric CYP11B1/CYP11B2 gene by long-PCR in all of them. Paternal grandparents were unaffected by the mutation. The proband was a 13 year-old boy with hypertension stage 2 (in agree to The Joint National. Committee. VII, JNC-VII), with an aldosterone/plasma rennin activity ratio equal, to 161. A DNA paternity test confirmed the parental relationship between the grandparents and father with the index case. MMP-9 and usPCR levels were determined by gelatin zymography and nephelometry, respectively. Results: All affected subjects had approximately a 50% increase in MMP-9 levels. Only the father had an elevated usPCR, The endothelial inflammation markers returned to normal range after glucocorticoid treatment. Conclusions: We report a family carrying a FH-I caused by a de novo mutation. The elevation of endothelial inflammation markers in these patients and its normalization after glucocorticoid treatment provides new indight about the possible deleterious effect of aldosterone on the endothelium.

Más información

Título de la Revista: REVISTA MEDICA DE CHILE
Volumen: 136
Número: 9
Editorial: Sociedad Médica de Santiago
Fecha de publicación: 2008
Página de inicio: 1134
Página final: 1140
URL: http://www.scopus.com/inward/record.url?eid=2-s2.0-56349099655&partnerID=q2rCbXpz