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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Correlates of sodium-lithium countertransport. Findings from the Gubbio Epidemiological Study. The Gubbio Collaborative Study Group.

BACKGROUND. Numerous reports have presented evidence for a positive association between the maximal velocity of the sodium-lithium countertransport (Na-Li CT) in erythrocytes and hypertension. The nature of this association remains to be clarified. METHODS AND RESULTS. This report presents correlates of Na-Li CT in a population sample of 3,591 people aged 5-74 years. Males had higher mean age-specific levels of Na-Li CT than females except for the 5-14-year age stratum. In adults aged 25-74, for both men (n = 1,044) and women (n = 1,192), body mass index, plasma uric acid and glucose, alcohol consumption, and red blood cell mean corpuscular volume were positively related to countertransport in multivariate analyses; plasma high-density lipoprotein (HDL) cholesterol and plasma potassium were inversely related. Plasma non-HDL cholesterol was independently and directly related to Na-Li CT in women, and plasma sodium was inversely associated with Na-Li CT in men. These relations prevailed for men when persons with hypertension were excluded from the analyses and prevailed in part for women. When stepwise regression analyses were done for all men and women combined (n = 2,236), sex ceased to be significantly related to countertransport with plasma uric acid and alcohol intake in the model. In adults of either sex, no independent association was detected between Na-Li CT and age, heart rate, or the ratios of sodium to potassium or of sodium to creatinine in overnight untimed urine. CONCLUSIONS. In both sexes, Na-Li CT is significantly and independently associated with a number of metabolic variables (plasma uric acid, plasma glucose, body mass index, plasma potassium, and life-style habits [e.g., alcohol intake]). Further research is needed to elucidate the meaning of the significant associations between Na-Li CT and the foregoing variables (all of them also related to blood pressure).[1]

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