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Amino acid loss during dialysis treatment

, : Amino acid loss during dialysis treatment. Giornale Italiano di Nefrologia 28(1): 26-31

Protein-calorie malnutrition is a widespread complication in hemodialysis (HD) patients and is associated with increased mortality. The pathogenesis of malnutrition is multifactorial. Intradialytic amino acid (AA) loss is considered one of the cofactors in the complex mechanisms that lead to malnutrition in HD patients. It has been documented that in each dialysis session there is a 6-8 gram loss of AA into the dialysate, which worsens with the use of high-flux membranes. The intradialytic AA loss is variably compensated by reduction of liver synthesis and increased AA release from muscle stores. In malnourished HD patients the serum AA concentration, especially branched-chain AA (BCAA), is correlated with nutritional status and anorexia, whereas BCAA supplementation improves the nutritional parameters and increases appetite. Further studies are necessary to clarify the role of alterations of AA metabolism in the pathogenesis of malnutrition and the potential beneficial effects of BCAA supplementation or alternative treatments in malnourished patients.


PMID: 21341242

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