Summary
The pathogenesis of the diabetic glomerular lesion is unknown. However, cumulative indirect evidence favors hemodynamic factors associated with the abnormal endocrine environment as the cause of diabetic angiopathy. Experimental evidence suggests that the increased hydrostatic pressures in capillary beds, a hallmark of the early stages of insulin-dependent diabetes, are associated with macromolecular leakage leading to the typical thickening of glomerular capillary basement membrane and increased glomerular mesangial matrix even prior to the occurrence of systemic hypertension. Patients with renal or carotid artery stenosis seem to be protected against diabetic nephropathy and retinopathy on the stenosed side. The first signal of diabetic nephropathy even before deterioration of the renal function is microalbuminuria detected by sensitive methods such as radioimmunoassay. Not only in hypertensive, but even in normotensive diabetic patients with microalbuminuria antihypertensive therapy has been shown to reduce albumin excretion rate and to slow the progression of diabetic nephropathy. Once overt diabetic nephropathy has been established, hypertension is a constant accompaniment of the disease. Thus, hypertension may be a cause as well as a result of diabetic nephropathy. Tight control of blood sugar in close association with antihypertensive treatment reducing blood pressure to a lower normal limit, possibly with agents that specifically decrease glomerular capillary hydraulic pressure are the corner stone in protection against progression of the diabetic angiopathy.
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Abbreviations
- ECF:
-
extracellular fluid
- ESRD:
-
end-stage renal disease
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Schrier, R.W., Holzgreve, H. Hemodynamic factors in the pathogenesis of diabetic nephropathy. Klin Wochenschr 66, 325–331 (1988). https://doi.org/10.1007/BF01735788
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DOI: https://doi.org/10.1007/BF01735788