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The time course of DNA repair following methyl nitro-nitrosoguanidine (MNNG) treatment of P388F lymphoma cells in culture. I. Alkali dissociable DNA lesions and their restitution.
Nikaido, O Fox, Brian W
Nikaido, O
Fox, Brian W
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Abstract
The pattern of formation and rejoining of P388F cell DNA single strand breaks revealed by alkaline sedimentation centrifugation studies following treatment with methyl nitro-nitrosoguanidine (MNNG) has been studied. Three periods of single strand break formation have been recognised, an initial period during the first 4 h where breaks are rapidly formed and rejoined, a second (medial) time range of 10-15 h following treatment and a final stage where the formation of breaks appears to be related to cell killing processes. The initial phase is considered to be due to the production and repair of X-ray like DNA lesions whereas those of the medial time range are more comparable to the enzymatic processes associated with the repair of ultraviolet light-induced damage.
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1976-07
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The time course of DNA repair following methyl nitro-nitrosoguanidine (MNNG) treatment of P388F lymphoma cells in culture. I. Alkali dissociable DNA lesions and their restitution. 1976, 14 (1-2):37-45 Chem Biol Interact