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[Protein metabolism in renal failure]
1Medicina Interna A. Francaviglia, Dipartimento di Medicina Interna e Patologie Sistemiche, Università di Catania, Italy. pcastell@unict.it
Summary
Protein-calorie malnutrition is common in chronic renal failure, increasing mortality risk. Factors like diet, inflammation, and metabolic acidosis worsen protein loss and affect albumin levels.
Area of Science:
- Nephrology
- Clinical Nutrition
- Biochemistry
Context:
- Chronic renal failure (CRF) patients exhibit protein-calorie malnutrition, elevating morbidity and mortality.
- Muscle mass loss in CRF is multifactorial, exacerbated by low protein intake.
Purpose:
- To evaluate factors influencing protein metabolism in CRF patients.
- To assess the impact of calorie/protein intake, leptin, and metabolic acidosis on protein metabolism.
Summary:
- CRF patients often show signs of malnutrition, increasing mortality risk.
- Hemodialysis can cause transient proteolysis and amino acid loss.
- Subclinical inflammation contributes to anorexia and muscle proteolysis, lowering albumin levels.
Impact:
- Reduced albumin levels in dialysis patients correlate with increased morbidity and mortality.
- Protein intake, acidosis, and inflammation negatively impact hepatic albumin synthesis.