Nephrology Dialysis Transplantation, Vol 12, Issue 4 643-645, Copyright © 1997 by Oxford University Press
R Trevisan and G Viberti
The epidemiological evidence that only a subset of diabetic patients are
susceptible to renal damage and the demonstration of clear familiar
clustering of diabetic nephropathy are consistent with the possibility that
genetic factors may explain the liability to or protection from renal
disease of diabetic patients. A predisposition to hypertension and
cardiovascular disease may be an important determinant of susceptibility to
renal disease and its cardiovascular complications in diabetes since raised
blood pressure [1] and an increased frequency of cardiovascular disease [2]
are more prevalent in parents of diabetic patients with nephropathy. These
results have raised growing interest in the search for intermediate
phenotypes significantly associated with diabetic nephropathy, poorly
influenced by environment, stable with age, easy to quantify and possibly
dependent upon a single major gene effect. Such intermediate phenotypes can
be useful for early diagnosis and would help clarify the molecular
mechanisms leading to diabetic nephropathy. An elevation of Na+/H+
antiporter activity has consistently been associated with diabetic renal
disease both in insulin-dependent diabetes mellitus (IDDM) and
non-insulin-dependent diabetes mellitus (NIDDM) patients, making this cell
membrane exchanger system an ideal intermediate phenotype for the study of
diabetic nephropathy.
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Sodium-hydrogen antiporter: its possible role in the genesis of diabetic nephropathy
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