1Singh NP, McCoy MT, Tice RR, et al. A simple technique for quantitation of low levels of DNA damage in individual cells[J]. Exp Cell Res,1988,175(1) : 184 - 191.
2Chevanne M, Caldini R, Tombaccini D, et al. Comparative levels of DNA breaks and sensitivity to oxidative stress in aged and senescent human fibroblasts: a distinctive pattern for centenarians [ J ]. Biogerontology, 2003,4 ( 2 ) : 97 - 104.
3Sedelnikova OA, Horikawa I, Zimonjic DB, et al. Senescing human cells and ageing mice accumulate DNA lesions with unrepairable double-strand breaks [ J ]. Nat Cell Biol,2004,6 (2) :168 - 170.
4Hamilton ML, Van Remmen H, Drake JA , et al. Does oxida- tive damage to DNA increase with age [ J ]. Proe Natl Acad Sci USA ,2001,98 ( 18 ) : 10469 - 10474.
5Waldstein EA,Peller S,Setlow RB. UV-endonuclease from calf thymus with specificity toward pyrimidine dimers in DNA[ J ]. Proc Nail Acad Sci USA ,1979,76(8) :3746- 3750.
6Nette EG,Xi YP,Sun YK,et al. A correlation between aging and DNA repair in human epidermal ceils[ J]. Mech Ageing Dev. 1984.24 ( 3 ) .283 - 292.