Pediatric Research 1982-05-01

Increased excretion of modified adenine nucleosides by children with adenosine deaminase deficiency.

R Hirschhorn, H Ratech, A Rubinstein, P Papageorgiou, H Kesarwala, E Gelfand, V Roegner-Maniscalco

Index: Pediatr. Res. 16(5) , 362-9, (1982)

Full Text: HTML

Abstract

We have identified seven adenine nucleosides in urines of untreated adenosine deaminase (ADA) deficient patients, four of which (adenosine, 2'-deoxyadenosine, 1-methyladenosine and N6-methyladenosine) have been previously identified in urines of normals and/or ADA deficient patients. We confirm that ADA deficient patients excrete markedly increased amounts of 2'-deoxyadenosine (582 +/- 363 versus normal of less than 0.1 nmoles/mg creatinine) and increased amounts of adenosine (29.4 +/- 5.7 versus normal of 4.12 +/- 1.0 nmoles/mg creatinine). We have found three modified adenine nucleosides previously undetected in human urine. These three compounds are 2'-O-methyladenosine, N6, 2'-O-dimethyladenosine and an as yet incompletely characterized modified adenine nucleoside, R-adenosine. Only ADA deficient patients excrete detectable amounts of 2'-O-methyladenosine (2.1 +/- 1.1 versus normal of less than 0.1 nmoles/ mg creatinine), whereas both normals and ADA deficient children excrete N6, 2'-O-dimethyladenosine and R-adenosine. However, ADA deficient patients do excrete increased amounts of R-adenosine (5.5 +/- 1.0 versus normal of 1.4 +/- 0.4 nmoles/mg creatinine).