Genetic heterogeneity of hypoxanthine-phosphoribosyl transferase in human fibroblasts of 3 families.

Abstract:

:Incorporation of hypoxanthine, resistance to 8-azaguanine and activation by lyophilisation have been studied in cultured human fibroblasts. Cells from one family where there was a boy with Lesch-Nyham syndrome, from two families with variant H-PRT mutations and three cell strains from patients with the Lesch-Nyham syndrome were investigated. Cells from patients with the Lesch-Nyham syndrome showed almost no hypoxanthine incorporation and resistance to concentrations of 8-azaguanine up to 10(-3) M, whereas cells of patients with partial H-PRT deficiency demonstrated variant patterns of hypoxanthine uptake and partial resistance to 8-azaguanine. Lyophilisation of fibroblast sediment from patients with the Lesch-Nyhan syndrome and patients with variant H-PRT mutations showed activation of the deficient or partially deficient H-PRT enzyme. No such activation was observed in healthy controls. Activation of lyophilised fibroblast extract from patients and controls was not obtained. These results suggest that H-PRT could be associated with the cell membranes.

journal_name

Clin Genet

journal_title

Clinical genetics

authors

Willers I,Held KR,Singh S,Goedde HW

doi

10.1111/j.1399-0004.1977.tb01299.x

subject

Has Abstract

pub_date

1977-03-01 00:00:00

pages

193-200

issue

3

eissn

0009-9163

issn

1399-0004

journal_volume

11

pub_type

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