title: N-(4-hydroxyphenyl) retinamide is anticlastogenic in human lymphoblastoid cell lines.
abstract: The in vitro anticlastogenic effects of a new synthetic retinoid derivative, N-(4-hydroxyphenyl)-retinamide (4-HPR), were studied in two human lymphoblastid cell lines (3640P and 4087P). Cell cultures were preincubated with 4-HPR in a range of concentrations from 10(-9) to 10(-6) M for 24 h. The number of chromatid breaks per cell (b/c) induced by a 2-hour treatment with 0.004 U/ml bleomycin was determined. The mean b/c values in cell cultures treated with bleomycin alone were 0.50 (3640P) and 0.73 (4087P). The presence of 10(-6) M 4-HPR significantly decreased this value in both cell lines to 0.27 in 3640P (p < 0.01) and 0.41 in 4087P (p < 0.05). Lower concentrations (10(-7) and 10(-8) M) of 4-HPR significantly decreased b/c only in cell line 3649 (p < 0.05). Incubation with the lowest concentration (10(-9) M) of 4-HPR did not decrease b/c values. These preliminary data demonstrate that 4-HPR has anticlastogenic effects in vitro and are similar to our results from previous studies on the in vitro antigenotoxic effects of 13-cis-retinoic acid (Trizna Z et al, Eur J Cancer, 1993, 29A: 137-140).
authors.affiliation: Department of Head and Neck Surgery, University of Texas M.D. Anderson Cancer Center, Houston 77030.
authors.forename: Z
authors.initials: Z
authors.lastname: Trizna
authors.forename: S E
authors.initials: SE
authors.lastname: Benner
authors.forename: L
authors.initials: L
authors.lastname: Shirley
authors.forename: C
authors.initials: C
authors.lastname: Furlong
authors.forename: W K
authors.initials: WK
authors.lastname: Hong
mesh_terms: D016587:Antimutagenic Agents / Q000494:pharmacology*; D001761:Bleomycin; D002460:Cell Line; D002842:Chromatids / Q000187:drug effects; D002873:Chromosome Fragility; D002877:Chromosomes, Human / Q000187:drug effects; D017313:Fenretinide / Q000494:pharmacology*; D006801:Humans; D007700:Kinetics; D008214:Lymphocytes / Q000187:drug effects* / Q000502:physiology*; D008954:Models, Biological
chemical_list: D016587:Antimutagenic Agents; D001761:Bleomycin; D017313:Fenretinide