The pathophysiology and natural history of diabetic nephropathy are de
scribed, and recent developments in its prevention and treatment are d
iscussed. Diabetic nephropathy can occur in both insulin-dependent and
non-insulin-dependent diabetics. It is characterized by arterial hype
rtension, proteinuria, and progressive loss of renal function. Althoug
h the exact mechanism has not been fully elucidated, hyperglycemia wit
h altered intraglomerular hemodynamics is an important contributor to
the initiation and progression of the disease. Concurrent hypertension
aggravates progression of the disease. Currently accepted strategies
to slow the progression of diabetic renal disease have focused on anti
hypertensive therapy, strict glucose control, and restriction of dieta
ry proteins. Recent publications support the hypothesis that angiotens
in-converting-enzyme inhibitors have a unique ability, independent of
their antihypertensive effect, to slow the progression of diabetic nep
hropathy. Investigational agents (e.g., aminoguanidine) may prove help
ful in the management of the condition. Information about the preventi
on of diabetic nephropathy has grown significantly in the past few yea
rs.