Assignment of the human cytidine deaminase (CDA) gene to chromosome 1 band p35-p36.2
- Universita di Pavia (Italy); and others
The enzyme cytidine deaminase (EC 3.5.4.12; CDA) catalyzes the hydrolytic deamination of cytidine or deoxycytidine to uridine or deoxyuridine, respectively. It can also catalyze the deamination of cytosine nucleoside analogues such as cytosine arabinoside and 5-azacytidine, which results in a loss of their cytotoxic and antitumor activity. Cytosine arabinoside is used in the treatment of acute myeloid leukemia, and the antileukemic activity of the drug is dependent on phosphorylation by deoxycytidine kinase. The occurrence of clinical cytosine arabinoside resistance is one of the main problems in the successful treatment of acute myeloid leukemia. Resistance to the drug has been ascribed to functional deoxycytidine kinase deficiency and to increased expression of the CDA gene. In this study, we report on the isolation of a CDA genomic fragment and its use as a probe for the chromosomal localization of the human CDA gene by in situ hybridization. 9 refs., 1 fig.
- OSTI ID:
- 186043
- Journal Information:
- Genomics, Vol. 22, Issue 3; Other Information: PBD: Aug 1994
- Country of Publication:
- United States
- Language:
- English
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