Document Detail


Altered renal sodium handling in men with abdominal adiposity: a link to hypertension.
MedLine Citation:
PMID:  11725158     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVES: Central adiposity, insulin resistance and hypertension are clearly interrelated but the mechanisms underlying this association have not been thoroughly elucidated. As renal sodium handling plays a central role in salt-sensitive forms of hypertension, we investigated the relation of renal tubular sodium handling to abdominal adiposity, blood pressure and insulin sensitivity. DESIGN: Population-based study. PARTICIPANTS: Five hundred and fifty-five untreated Olivetti male workers, aged 25-75 years. SETTING: Olivetti factory medical centers in Pozzuoli and Marcianise (Naples, Italy) MAIN OUTCOME MEASURES: Anthropometric indices, serum insulin, homeostatic model assessment index of insulin sensitivity, blood pressure, fractional excretions of uric acid and exogenous lithium (as markers of renal tubular sodium handling). RESULTS: In univariate analysis, measures of central adiposity (i.e. sagittal abdominal diameter and umbilical circumference) were directly correlated with serum insulin (P < 0.001) and blood pressure levels (P < 0.001) and inversely associated with the fractional excretions of uric acid and lithium (P = 0.01-0.001). In multiple linear regression analysis, the same anthropometric indices but not the measures of peripheral adiposity (arm circumference and tricipital skinfold thickness), were significant predictors of the fractional excretion of uric acid and lithium, independently of age, blood pressure and serum insulin levels (P = 0.01-0.001). CONCLUSIONS: Abdominal adiposity was associated with altered renal tubular sodium handling apart from insulin resistance and high blood pressure. The data indicate that men with prevalent abdominal adiposity have an enhanced rate of tubular sodium reabsorption, mainly at proximal sites. These findings provide a possible mechanistic link between central adiposity and salt-dependent hypertension.
Authors:
P Strazzullo; G Barba; F P Cappuccio; A Siani; M Trevisan; E Farinaro; E Pagano; A Barbato; R Iacone; F Galletti
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of hypertension     Volume:  19     ISSN:  0263-6352     ISO Abbreviation:  J. Hypertens.     Publication Date:  2001 Dec 
Date Detail:
Created Date:  2001-11-28     Completed Date:  2002-02-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8306882     Medline TA:  J Hypertens     Country:  England    
Other Details:
Languages:  eng     Pagination:  2157-64     Citation Subset:  IM    
Affiliation:
Department of Clinical and Experimental Medicine, Unit of Clinical Genetics and Pharmacology, Hypertension and Mineral Metabolism, Federico II University of Naples Medical School, Naples, Italy. strazzul@unina.it
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MeSH Terms
Descriptor/Qualifier:
Abdomen*
Adipose Tissue / anatomy & histology*
Adult
Aged
Anthropometry
Blood Pressure
Humans
Hypertension / chemically induced
Insulin Resistance
Kidney / metabolism*
Kidney Tubules / metabolism
Male
Middle Aged
Sodium / metabolism*
Sodium Chloride
Chemical
Reg. No./Substance:
7440-23-5/Sodium; 7647-14-5/Sodium Chloride

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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