Abstract:
:We measured plasma sulphur amino acids in twenty-two patients with chronic renal failure and compared the findings with those obtained in twenty-two normal subjects. In fasting blood (08.00 hours) cysteine-homocysteine mixed disulphide was significantly increased in the renal patients, mean values (+/- SD) being 8.2 +/- 3.4 and 3.1 +/- 1.0 mumol/l respectively (P less than 0.001). The increase was positively correlated with reduced renal function, as assessed by serum creatinine (r = 0.62; P less than 0.01). Homocystine was detected in nineteen patients, the mean concentration (+/- SD) being 1.7 +/- 0.6 mumol/l; it was not found in any normal subject. Methionine levels were not different but there were significant increases in cystine (P less than 0.001) and taurine (P less than 0.05) in the patients. Similar values for these amino acids were found in a second blood sample drawn at 16.00 hours. Changes in the other neutral and acidic amino acids measured were in agreement with those reported in chronic azotaemia. We concluded that plasma levels of all the principal sulphur amino acids except methionine are elevated in chronic renal failure emphasizing the importance of the kidney in sulphur excretion. Prolonged accumulation of homocysteine and cysteine-homocysteine mixed disulphide may be relevant to the development of accelerated vascular disease in patients with chronic renal failure by producing endothelial damage.
journal_name
Eur J Clin Investjournal_title
European journal of clinical investigationauthors
Wilcken DE,Gupta VJdoi
10.1111/j.1365-2362.1979.tb00888.xkeywords:
subject
Has Abstractpub_date
1979-08-01 00:00:00pages
301-7issue
4eissn
0014-2972issn
1365-2362journal_volume
9pub_type
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