Hung CF, Wong KT, Tsai CI, Lin CS, Chung JG. Arylamine N-acetyltransferase activity and 2 aminofluorene-DNA adducts formation in rat glial tumor cells.
Acta Paediatr Taiwan 2000;
41:133-5. [PMID:
10920545]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Arylamine N-acetylation capacity by the N-acetyltransferase (NAT) may be an important causative factor in the initiation of cancer. Arylamine-DNA adducts formation have been correlated with the carcinogenic effect of heterocyclic aromatic amines. NAT activity in rat glial tumor cells was measured by high performance liquid chromatography (HPLC) using 2-aminofluorene (2-AF) and p-aminobenzoic acid (PABA) as substrares. 2-AF-DNA adducts formation in rat glial tumor cells was investigated by gamma-[32p]-dATP and HPLC using 2-aminofluorene as substrates. The activities (Mean +/- SD) of NAT in rat glial cells was 1.08 +/- 0.18 nmol/min/mg protein for the acetylation of 2-aminofluorene (n = 12), and 0.96 +/- 0.16 nmol/min/mg protein for the acetylation of p-aminobenzoic acid (n = 12). 2-AF-DNA adducts formation in rat glial tumor cells with 30 microM and 60 microM AF were 0.48 +/- 0.16 and 0.70 +/- 0.12 pmol/mg DNA, respectively. The results indicate that NAT was present in rat glial tumor cells, activating AF to become a metabolite able to bind covalently with DNA to form 2-AF-DNA.
Collapse