Abstract
Aim of this study is to evaluate whether among type I diabetic adolescents (IDDM) the erythrocyte Na-Li countertransport (CNT Na-Li) is correlated with arterial pressure and tubular sodium reabsorption. We have studied 16 IDDM adolescents (age 15 ± 0.5 year) and 15 normal subjects (age 14.5 ± 1 year). CNT Na-Li, creatinine and lithium clearances (as markers of glomerular filtration rate and proximal tubular sodium reabsorption) have been measured in all subjects and nocturnal urinary albumin excretion rate (UAER) was measured in IDDM adolescents. CNT Na-Li was 308 ± 26 μmol Li/l RBC/h in IDDM adolescents and 211 ± 74 μmol Li/l RBC/h in controls (p < 0.01). The fractional excretion of lithium (FELi) was significantly reduced in IDDM adolescents compared to normal subjects (12 ± 2 vs 19 ± 2%; p < 0.01). Among the IDDM adolescents, 5 had the CNT Na-Li higher than the 95th percentile of controls (>360 μmol Li/l GR/h); their systolic arterial pressure was significantly higher than in diabetics with normal CNT Na-Li (126 ± 2 vs 116 ± 2; p = 0.03), while there were no differences for diabetes duration, glycemic control, serum potassium, creatinine clearance, FELi and UAER. The relationship between CNT Na-Li and arterial pressure in IDDM adolescents deserves further studies.
Titolo tradotto del contributo | Erythrocyte Na-Li countertransport in diabetic adolescents |
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Lingua originale | Francese |
pagine (da-a) | 1249-1251 |
Numero di pagine | 3 |
Rivista | Archives des Maladies du Coeur et des Vaisseaux |
Volume | 83 |
Numero di pubblicazione | 8 |
Stato di pubblicazione | Pubblicato - 1990 |
Pubblicato esternamente | Sì |