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Unilateral nephrectomy causes an early abrupt decrease in plasma arginine and simultaneous reduction in glomerular filtration rate in living kidney donors.

Abstract：

OBJECTIVES:Living donor kidney transplantation is regarded as beneficial to allograft recipients and not particularly detrimental to the donors. Recently we have documented a reduced glomerular filtration rate (GFR) in living kidney donors (LKDs). Considering kidneys as essential for l-arginine (Arg) metabolism, in the present study we analyzed plasma Arg and related compounds comparing them with the function of remaining kidney in LKDs after donation. DESIGN AND METHODS:We analyzed GFR, plasma Arg, asymmetric dimethylarginine (ADMA), citrulline (Cit), glutamine (Gln), ornithine (Orn), phenylalanine (Phe), tyrosine (Tyr), thiobarbituric acid reactive substances (TBARS), urea, creatinine, nitrite, nitrate and their sum (NOx) in blood samples taken from LKDs before, immediately after (0-time) and 1, 2, 3, 7 and 14 days following surgery. RESULTS:Gradual and moderate creatinine increase and albumin decrease were associated with decreased GFR. An abrupt decrease in Arg occurred, staying below baseline level throughout the 14 days. Also decreases in Gln, Cit, Orn, increase in Phe and TBARS, and unaltered ADMA, nitrite and NOx concentrations were obtained. Despite increased net protein catabolism (indicated by elevated Phe/Tyr ratios) lack of Arg, suggested by decreased molar Arg/Phe ratios, occurred. Decreased molar Arg/Gln suggests an early but transient decrease in Arg synthesis. CONCLUSION:Unilateral nephrectomy causes an early abrupt decrease in plasma arginine and reduction in glomerular filtration rate in LKDs that was associated with increased net protein breakdown in the peripheral tissues and elevated oxidative damage, which has to be considered in their therapy.

journal_name

Clin Biochem

journal_title

Clinical biochemistry

authors

Zunić G,Tomić A,Spasić S

doi

10.1016/j.clinbiochem.2013.04.031

subject

Has Abstract

pub_date

2013-10-01 00:00:00

pages

1394-8

issue

15

eissn

0009-9120

issn

1873-2933

pii

S0009-9120(13)00172-0

journal_volume

46

pub_type

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