title: [p73 gene expression in apoptotic process of acute myeloid leukemia cell line U937 induced by methotrexate].
abstract: The purpose of this investigation was to study the variation of p73 gene expression in the apoptotic process of acute myeloid leukemia (AML) cell line U937 induced by methotrexate (MTX). Morphological changes of apoptotic cells were observed with microscopy and Wright's + Giemsa staining. DNA ladder and cell cycle were examined by agarose gel electrophoresis and flow cytometry respectively. Using semi-quantitive reverse transcription-polymerase chain reaction (RT-PCR), the expression of p73 mRNA was examined. Results showed that MTX could induce U937 cell apoptosis effectively. Condensed nuclei, fragmentation of chromosome and DNA ladder were seen after 6 hour following treatment of MTX 5 micro mol/L. Sub-G(1) peak and S + G(2)/M arrest were also determined by FCM, but the quantity of p73 expression was generally constant. In conclusion, U937 cell apoptosis induced by MTX did not change p73 mRNA level.
authors.affiliation: Department of Hematology, The Second Affiliated Hospital of Nanhua University, Hengyang 421001, China.
authors.forename: Guang-Fen
authors.initials: GF
authors.lastname: Xiao
authors.forename: Qing
authors.initials: Q
authors.lastname: Lu
authors.forename: Xiang-Dong
authors.initials: XD
authors.lastname: Yang
mesh_terms: D000208:Acute Disease; D000964:Antimetabolites, Antineoplastic / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects* / Q000235:genetics; D002453:Cell Cycle / Q000187:drug effects; D002455:Cell Division / Q000187:drug effects; D004273:DNA, Neoplasm / Q000187:drug effects / Q000235:genetics / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000235:genetics*; D005434:Flow Cytometry; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects; D016147:Genes, Tumor Suppressor; D006801:Humans; D007951:Leukemia, Myeloid / Q000188:drug therapy / Q000235:genetics* / Q000473:pathology; D008727:Methotrexate / Q000494:pharmacology*; D009687:Nuclear Proteins / Q000235:genetics*; D012333:RNA, Messenger / Q000187:drug effects / Q000235:genetics / Q000378:metabolism; D000072160:Tumor Protein p73; D025521:Tumor Suppressor Proteins; D020298:U937 Cells
chemical_list: D000964:Antimetabolites, Antineoplastic; D004273:DNA, Neoplasm; D004268:DNA-Binding Proteins; D009687:Nuclear Proteins; D012333:RNA, Messenger; C000606460:TP73 protein, human; D000072160:Tumor Protein p73; D025521:Tumor Suppressor Proteins; D008727:Methotrexate