Faculty Collaboration Database

A genealogical study of essential hypertension with and without obesity in French Canadians. Obes Res 2002 Jun;10(6):463-70

Date

06/11/2002

Pubmed ID

12055322

DOI

10.1038/oby.2002.64

Scopus ID

2-s2.0-0036616335 (requires institutional sign-in at Scopus site)   26 Citations

Abstract

OBJECTIVES: To investigate genetic homogeneity in a set of hypertensive families and in subsets chosen for high and low prevalence of obesity; and to compare fasting insulin and lipids, ion transport, and water homeostasis in the obese and lean families.

RESEARCH METHODS AND PROCEDURES: The study was carried out in a relative population isolate of the Saguenay/Lac St. Jean region in Canada. Genetic homogeneity was evaluated with the mean coeffigcients of kinship (phi) and inbreeding (F) computed with ascending genealogies. Serum insulin and lipids were measured after overnight fasting. Total body water was estimated with bioelectrical impedance. Sodium-lithium countertransport and sodium-potassium co-transport were determined in freshly isolated erythrocytes.

RESULTS: F and phi were increased in hypertensive families compared with families selected at random. F and phi were further increased within the subsets of obese and lean families. In addition, fasting insulin, total body water, sodium-lithium countertransport, and sodium-potassium co-transport were higher in the obese than in the lean families. The two subsets of families did not differ by fasting lipids.

DISCUSSION: In the Saguenay/Lac St. Jean population, the degree of genetic homogeneity was increased in families selected for hypertension, and it was further increased in subsets of hypertensive families with high and low prevalence of obesity. This suggests that hypertension in lean and obese individuals may represent, at least in part, separate genetic entities. Some of the extra genes shared in common within the subsets may contribute to their differences in body weight, insulin sensitivity, ion transport, and water homeostasis.

Author List

Pausova Z, Jomphe M, Houde L, Vezina H, Orlov SN, Gossard F, Gaudet D, Tremblay J, Kotchen TA, Cowley AW, Bouchard G, Hamet P

MESH terms used to index this publication - Major topics in bold

Antiporters
Biological Transport
Body Water
Consanguinity
Electric Impedance
Erythrocytes
Female
Humans
Hypertension
Insulin
Lipids
Lithium
Male
Middle Aged
Obesity
Potassium
Quebec
Risk Factors
Sodium