Summary
There is controversy as to whether increased plasma levels of human atrial natriuretic peptide (hANP) in patients with type 1 diabetes mellitus may contribute to the development of diabetic nephropathy. Therefore, we decided to conduct two studies to examine the relationship of hANP levels to urinary albumin excretion and blood pressure. In a cross-sectional study, 83 randomly selected type 1 diabetic patients were investigated. 19 of the patients had increased urinary albumin excretion. 45 healthy volunteers served as controls. In a longitudinal study, 19 type 1 diabetic patients were examined for one year at monthly intervals. An increased risk of eventually developing diabetic nephropathy was identified in 7 out of these patients by repeatedly revealing increased urinary albumin excretion. On the average, hANP levels were increased in type 1 diabetic patients in comparison to controls (P < 0.001). In both studies, hANP levels were positively related (P < 0.05) to mean arterial blood pressure. There was no correlation between hANP levels and metabolic control. hANP levels lay within normal range irrespective of normal or elevated urinary albumin excretion provided that mean arterial blood pressure was normal. In the longitudinal study, increased urinary albumin and alpha-1-microglobulin excretion preceded the increase in both hANP levels and mean arterial blood pressure. Although hANP levels were evidently not related to the disease mechanisms of early diabetic nephropathy, it is tempting to speculate that hANP may contribute to the vicious circle connecting diabetic kidney disease to hypertension once that its levels are increased by elevated blood pressure.
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Abbreviations
- hANP:
-
human atrial natriuretic peptide
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Jungmann, E., Felber, A., Graeber, S. et al. Human atrial natriuretic peptide in patients with type 1 diabetes mellitus: is it related to the development of diabetic nephropathy?. Clin Investig 71, 604–609 (1993). https://doi.org/10.1007/BF00184483
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DOI: https://doi.org/10.1007/BF00184483