Abstract
The presence of albuminuria–proteinuria in diabetic patients is an indication of early renal disease and signifies systemic endothelial dysfunction. Even a small amount of albuminuria (<30 mg/day) carries a risk for cardiovascular disease (CVD). Abnormalities in podocyte-specific proteins seem to be the underlying mechanisms for albuminuria–proteinuria. Whenever a diabetic patient presents with heavy albuminuria–proteinuria, the nephrologist should consider the coexistence of nondiabetic primary glomerular diseases. Renal biopsy in such a patient is clearly warranted.
The screening for albuminuria should begin from puberty and 5 years after the diagnosis of diabetes in type 1 patients. Albumin:creatinine ratio in a morning voided specimen is usually the standard way of expressing the excretion of albuminuria in the outpatient setting. Reagents strips for documenting the minute quantities of albuminuria are available in the office setting and diabetes clinics. Screening for albuminuria should begin during the first visit in type 2 diabetic patients.
Angiotensin-converting enzyme inhibitors (ACE-Is) or angiotensin receptor-blockers (ARBs) are the drugs of choice for the treatment of albuminuria–proteinuria. Prevention of albuminuria delays the progression of kidney disease as well as CVD. Combination of an ACE-I and an ARB is not recommended; however, a combination of either one of these drugs and an aldosterone antagonist seems to have an added benefit in the prevention of renal and CV diseases. Many new drugs targeting podocytes are being evaluated in animals and humans to prevent albuminuria–proteinuria in diabetic and nondiabetic patients. It is hoped that their introduction into the clinical practice is expected to decrease the morbidity and mortality in patients with albuminuria–proteinuria.
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Seshan, S.V., Reddi, A.S. (2014). Albuminuria–Proteinuria in Diabetes Mellitus. In: Lerma, E., Batuman, V. (eds) Diabetes and Kidney Disease. Springer, New York, NY. https://doi.org/10.1007/978-1-4939-0793-9_9
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DOI: https://doi.org/10.1007/978-1-4939-0793-9_9
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