title: Antiproliferative activity of vitamin D compounds in combination with cytostatics.
abstract: Calcitriol is a potent antiproliferative agent against various tumour cells in vitro. Here, the results of a study on vitamin D compounds (calcitriol's analogues PRI-1906 and PRI-2191) as potential agents in combined antitumour therapy in vitro are presented. Applying antiproliferative SRB and MTT assays, the growth inhibitory effects of the vitamin D compounds, applied alone or in combination with either cisplatin or doxorubicin, were measured. The following cancer cell lines were employed: A549 (human non-small cell lung carcinoma), B16 (murine melanoma), CCRF, HL-60 (human leukaemia), SW707 (human colon cancer), MCF-7, T47D (human breast cancer), WEHI-3 (mouse leukaemia) and normal cells: BALB 3T3 (normal murine fibroblast cell line). It was shown that the treatment of tumour cells, which are sensitive to vitamin D compounds, with the combination of vitamin D compounds and cytostatics decreased the inhibitory concentration 50% (IC50) values compared with the effects of the cytostatics applied alone.
authors.affiliation: Department of Experimental Oncology, Institute of Immunology and Experimental Therapy, 12 R. Weigla St., 53-114 Wroclaw, Poland. mapelcz@iitd.pan.wroc.pl
authors.forename: Marzena
authors.initials: M
authors.lastname: Pelczynska
authors.forename: Marta
authors.initials: M
authors.lastname: Switalska
authors.forename: Magdalena
authors.initials: M
authors.lastname: Maciejewska
authors.forename: Iwona
authors.initials: I
authors.lastname: Jaroszewicz
authors.forename: Andrzej
authors.initials: A
authors.lastname: Kutner
authors.forename: Adam
authors.initials: A
authors.lastname: Opolski
mesh_terms: D000818:Animals; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000494:pharmacology*; D041702:BALB 3T3 Cells; D002117:Calcitriol / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000494:pharmacology; D048708:Cell Growth Processes / Q000187:drug effects; D045744:Cell Line, Tumor; D002945:Cisplatin / Q000008:administration & dosage; D004100:Dihydroxycholecalciferols / Q000008:administration & dosage / Q000494:pharmacology; D004317:Doxorubicin / Q000008:administration & dosage; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D051379:Mice
chemical_list: D004100:Dihydroxycholecalciferols; C023850:1 alpha,24-dihydroxyvitamin D3; D004317:Doxorubicin; D002117:Calcitriol; D002945:Cisplatin