title: Gender-specific correlates of leptin with hypertension-related phenotypes in African Americans.
abstract: Leptin may be a link in the relationship of obesity with hypertension. We evaluated associations of leptin with blood pressure (BP) in 54 normotensive and 114 hypertensive African American individuals. Plasma leptin was higher (P <.03) in hypertensive women than in normotensive women, although body mass index did not differ (30.5 +/- 0.5 v 30.2 +/- 0.8 kg/m(2)). After adjusting for obesity and insulin resistance, there were no significant relationships between leptin and BP; however, leptin independently predicted 28% of the variability of heart rate in hypertensive men (P <.01) and 18% of the variability of lithium clearance in hypertensive women (P <.01). Thus, in these obese hypertensive African American women, there is no direct or independent association of leptin with BP. However, leptin may contribute to hypertension in these women by increasing renal tubular sodium reabsorption.
authors.affiliation: Department of Medicine, Medical College of Wisconsin, 9200 West Wisconsin Avenue, Milwaukee, WI 53226, USA.
authors.forename: Areeg H
authors.initials: AH
authors.lastname: El-Gharbawy
authors.forename: Jane Morley
authors.initials: JM
authors.lastname: Kotchen
authors.forename: Clarance E
authors.initials: CE
authors.lastname: Grim
authors.forename: Mary
authors.initials: M
authors.lastname: Kaldunski
authors.forename: Raymond G
authors.initials: RG
authors.lastname: Hoffmann
authors.forename: Zdenka
authors.initials: Z
authors.lastname: Pausova
authors.forename: Pavel
authors.initials: P
authors.lastname: Hamet
authors.forename: Theodore A
authors.initials: TA
authors.lastname: Kotchen
mesh_terms: D000328:Adult; D044383:Black People; D015992:Body Mass Index; D005260:Female; D006801:Humans; D006973:Hypertension / Q000097:blood* / Q000208:ethnology* / Q000503:physiopathology; D007328:Insulin / Q000097:blood; D020738:Leptin / Q000097:blood*; D008297:Male; D009765:Obesity / Q000097:blood / Q000208:ethnology* / Q000503:physiopathology; D012737:Sex Factors; D001741:Black or African American
chemical_list: D007328:Insulin; D020738:Leptin