title: Establishment of a tetraploid Meth-A cell line through polyploidization by demecolcine but not by staurosporine, K-252A and paclitaxel.
abstract: Polyploid cells are made by DNA reduplication without cell division, however, it is not easy to establish polyploid mammalian cell lines. It is worth studying the difference in cell character between hyperploid and parent cell lines. Meth-A cells were polyploidized by demecolcine, K-252a, staurosporine and paclitaxel. The cell-cycle responses of highly polyploid Meth-A cells after the removal of the drugs were examined by flow cytometry (FCM). Meth-A cells were highly polyploidized by these drugs. The polyploid Meth-A cells gradually decreased in ploidy after the drug release. A tetraploid Meth-A cell line was established only from the demecolcine-induced polyploid Meth-A cells. The duration of G1, S and G2/M phases of the tetraploid cell line were mostly the same as those of the parent diploid cells, except that the G2/M phase was 1.5 h longer. The chromosome number of tetraploid Meth-A cell line was about twice of the diploidy. A tetraploid Meth-A cell line was established.
authors.affiliation: Division of Basic Science, Research Institute of Medical Science, Kanazawa Medical University, Ishikawa, Japan. fujikawa@kanazawa-u.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Fujikawa-Yamamoto
authors.forename: S
authors.initials: S
authors.lastname: Wang
authors.forename: H
authors.initials: H
authors.lastname: Yamagishi
authors.forename: C
authors.initials: C
authors.lastname: Ohdoi
authors.forename: H
authors.initials: H
authors.lastname: Murano
authors.forename: T
authors.initials: T
authors.lastname: Ikeda
mesh_terms: D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000494:pharmacology*; D002227:Carbazoles / Q000494:pharmacology; D002452:Cell Count; D002453:Cell Cycle / Q000187:drug effects; D002455:Cell Division / Q000187:drug effects; D004247:DNA / Q000378:metabolism; D003703:Demecolcine / Q000494:pharmacology*; D004791:Enzyme Inhibitors / Q000494:pharmacology; D005434:Flow Cytometry; D026121:Indole Alkaloids; D007621:Karyotyping; D051379:Mice; D017239:Paclitaxel / Q000494:pharmacology; D011003:Ploidies; D012509:Sarcoma / Q000188:drug therapy* / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D019311:Staurosporine / Q000494:pharmacology; D014407:Tumor Cells, Cultured / Q000166:cytology* / Q000187:drug effects*
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D002227:Carbazoles; D004791:Enzyme Inhibitors; D026121:Indole Alkaloids; D004247:DNA; C049985:staurosporine aglycone; D019311:Staurosporine; D017239:Paclitaxel; D003703:Demecolcine