title: Photodynamic action and chromosomal damage: a comparison of haematoporphyrin derivative (HpD) and light with X-irradiation.
abstract: Chromosomal aberrations (CA) are induced in human cells (NHIK 3025) in vitro when exposed to X-rays and to haematoporphyrin derivative (HpD) plus light. At the 0 . 1 survival level X-rays induce about 10 times more breaks per chromosome than the photodynamic treatment. There is some evidence for non-random distribution of the CA induced by HpD plus light; i.e. they seem to be localized at the centromeric and telomeric regions. Such non-random distribution of CA could be explained if centromeric and telomeric chromatin were associated with the inner nuclear membrane.
mesh_terms: D002278:Carcinoma in Situ; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects / Q000528:radiation effects; D002869:Chromosome Aberrations; D004307:Dose-Response Relationship, Radiation; D006415:Hematoporphyrins / Q000009:adverse effects*; D006801:Humans; D008027:Light; D010778:Photochemotherapy / Q000009:adverse effects*; D014965:X-Rays
chemical_list: D006415:Hematoporphyrins