title: Influence of Etoposide on anti-apoptotic and multidrug resistance-associated protein genes in CD133 positive U251 glioblastoma stem-like cells.
abstract: It has been hypothesized that cancer stem cell is responsible for the refractoriness of glioblastoma therapy. This study is to observe the influence of Etoposide on anti-apoptotic and multidrug resistance-associated protein genes in glioblastoma stem-like cells. U251 glioblastoma cells were cultured and CD133 positive cancer stem-like cells were isolated and identified. Cell counting kit-8 assay, cell morphology and flow cytometry were employed for assaying cell survival condition. Real-time quantitative PCR was chosen for detecting mRNA expression of livin, livinalpha, livinbeta, survivin, MRP1 and MRP3. As results, after Etoposide intervention, the U251 stem-like cells showed more resistant property, more intact morphology and lower apoptotic rate than that in U251 cells (p<0.05). It could be found that the expression of livinbeta in U251 stem-like cells was significantly higher (p<0.05). After Etoposide intervention, only livinalpha was suppressed markedly (p<0.05), while livin expression was not notably decreased with livinbeta increased on the contrary (p<0.05). MRP1 and MRP3 in U251 stem-like cells were significantly higher than that in cancer cells, and after chemotherapy, the expression of MRP1 increased notably (p<0.05). But the expression of survivin and MRP3 did not show these features. In conclusion, after Etoposide intervention glioblastoma stem-like cells showed a stronger resistance to apoptosis and death, and the anti-apoptotic gene livinbeta was more related with the high survival rate and MRP1 appeared to be more related with transporting chemotherapeutics out of glioblastoma stem-like cells.
authors.affiliation: Department of Neurosurgery, Neuro-oncology Laboratory, Affiliated Hospital of Jining Medical College, Jining, Shandong 272029, PR China.
authors.forename: Feng
authors.initials: F
authors.lastname: Jin
authors.forename: Lei
authors.initials: L
authors.lastname: Zhao
authors.forename: Yuan-Jin
authors.initials: YJ
authors.lastname: Guo
authors.forename: Wan-Ju
authors.initials: WJ
authors.lastname: Zhao
authors.forename: Hao
authors.initials: H
authors.lastname: Zhang
authors.forename: Hai-Tao
authors.initials: HT
authors.lastname: Wang
authors.forename: Tong
authors.initials: T
authors.lastname: Shao
authors.forename: Shu-Ling
authors.initials: SL
authors.lastname: Zhang
authors.forename: Yu-Jia
authors.initials: YJ
authors.lastname: Wei
authors.forename: Jun
authors.initials: J
authors.lastname: Feng
authors.forename: Xiao-Bing
authors.initials: XB
authors.lastname: Jiang
authors.forename: Hong-Yang
authors.initials: HY
authors.lastname: Zhao
mesh_terms: D000071916:AC133 Antigen; D048868:Adaptor Proteins, Signal Transducing / Q000235:genetics / Q000378:metabolism; D015703:Antigens, CD / Q000378:metabolism; D000970:Antineoplastic Agents / Q000494:pharmacology; D017209:Apoptosis / Q000187:drug effects* / Q000235:genetics; D001932:Brain Neoplasms / Q000235:genetics*; D045744:Cell Line, Tumor; D002469:Cell Separation; D019008:Drug Resistance, Neoplasm / Q000235:genetics*; D005047:Etoposide / Q000494:pharmacology; D005434:Flow Cytometry; D015870:Gene Expression / Q000187:drug effects; D019450:Genes, MDR / Q000187:drug effects*; D005909:Glioblastoma / Q000235:genetics*; D006023:Glycoproteins / Q000378:metabolism; D006801:Humans; D051034:Inhibitor of Apoptosis Proteins / Q000235:genetics / Q000378:metabolism; D027425:ATP-Binding Cassette, Sub-Family C Proteins / Q000187:drug effects / Q000235:genetics / Q000378:metabolism; D009363:Neoplasm Proteins / Q000235:genetics / Q000378:metabolism; D014411:Neoplastic Stem Cells / Q000187:drug effects* / Q000378:metabolism; D010455:Peptides / Q000378:metabolism; D012333:RNA, Messenger / Q000032:analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D000071916:AC133 Antigen; D048868:Adaptor Proteins, Signal Transducing; D015703:Antigens, CD; D000970:Antineoplastic Agents; D005047:Etoposide; D006023:Glycoproteins; D051034:Inhibitor of Apoptosis Proteins; D027425:ATP-Binding Cassette, Sub-Family C Proteins; D009363:Neoplasm Proteins; D010455:Peptides; D012333:RNA, Messenger; C419866:BIRC7 protein, human; C000606023:PROM1 protein, human; C421109:multidrug resistance-associated protein 1