DNA strand break metabolism in human lymphocytes: a reevaluation

¹Harvard Medical School, Beth Israel Hospital, Gerontology Division, Boston, Massachusetts 02215.

|September 1, 1991

Abstract:

Recent findings concerning the presumed existence of single-strand breaks (SSB) in quiescent human peripheral blood lymphocytes (PBL) are discussed in relation to the role of poly(ADP-ribosyl)ation in DNA strand break metabolism. It is argued that the activation of poly(ADP-ribose)polymerase (ADPRP) by a DNA-damaging agent is not indicative of an obligatory role of poly(ADP-ribosyl)ation in DNA repair. From this it follows that SSB induced by different strand-breaking agents might be removed by either ADPRP-dependent or ADPRP-independent DNA repair pathways.

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Abstract:

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