title: In vitro effect of adenovirus-mediated human Gamma Interferon gene transfer into human mesenchymal stem cells for chronic myelogenous leukemia.
abstract: For developing gene therapy for chronic myelogenous leukemia (CML), we evaluated the feasibility of using autologous bone marrow stromal cells (BMSCs) of one CML patient as a target cell population and studied the efficiency of recombinant adenovirus-mediated human Gamma Interferon (hIFN-gamma) gene transfer into BMSCs. BMSCs can be readily obtained, expanded, and successfully transduced with adenoviral vectors in vitro. We studied the in vitro expression of hIFN-gamma in human BMSCs following transduction with Ad/hIFN-gamma. On transduction of BMSCs at a MOI of 50, the expression and secretion of hIFN-gamma were achieved as high as 5492 +/- 660 approximately 50647 +/- 4049 ng/10(6) cells per 24 h over the course of 3 weeks. We further studied the effects of hIFN-gamma produced by transduced BMSCs on the proliferation of the human leukemia cell line K562 cells in vitro, proliferation of K562 cells was markedly inhibited in the experimental groups as compared with the other two control groups after 5 days of coculture. We also found that the percentage of K562 cells in the G(1) phase of cell cycle can be increased by treatment of hIFN-gamma produced by Ad/hIFN-gamma transduced BMSCs, but the percentage of K562 cells in the S phase of cell cycle can be decreased in the same time. Apoptosis rate of K562 cells in the experimental groups was 30.8 +/- 8.5%, as compared with the other two control groups (5.6 +/- 1.3% and 5.5 +/- 0.8%, respectively) (p < 0.01). Our results indicate that hIFN-gamma gene engineered BMSCs of CML donors could be successfully established and that local production of hIFN-gamma is sufficiently to inhibit the proliferation of K562 cells and induce apoptosis of K562 cells in vitro, suggesting an important potential use in the clinical gene therapy of CML.
authors.affiliation: State Key Laboratory of Oncology in Southern China and Department of Hematology/Oncology, Cancer Center, Sun Yat-sen University, Guangzhou, Guangdong, 510060, PR China.
authors.forename: XiaoQing
authors.initials: X
authors.lastname: Li
authors.forename: Yue
authors.initials: Y
authors.lastname: Lu
authors.forename: WenLin
authors.initials: W
authors.lastname: Huang
authors.forename: HaiPeng
authors.initials: H
authors.lastname: Xu
authors.forename: XiaoQin
authors.initials: X
authors.lastname: Chen
authors.forename: QiRong
authors.initials: Q
authors.lastname: Geng
authors.forename: HuiJie
authors.initials: H
authors.lastname: Fan
authors.forename: YinDuo
authors.initials: Y
authors.lastname: Tan
authors.forename: Gang
authors.initials: G
authors.lastname: Xue
authors.forename: XiangLi
authors.initials: X
authors.lastname: Jiang
mesh_terms: D000256:Adenoviridae; D017209:Apoptosis / Q000235:genetics; D001854:Bone Marrow Cells / Q000378:metabolism; D018920:Coculture Techniques; D005260:Female; D015316:Genetic Therapy / Q000379:methods; D006801:Humans; D007371:Interferon-gamma / Q000096:biosynthesis* / Q000235:genetics; D020014:K562 Cells; D015464:Leukemia, Myelogenous, Chronic, BCR-ABL Positive / Q000235:genetics / Q000378:metabolism* / Q000628:therapy; D008297:Male; D059630:Mesenchymal Stem Cells / Q000378:metabolism*; D011994:Recombinant Proteins; D016196:S Phase / Q000235:genetics; D017154:Stromal Cells / Q000378:metabolism; D014161:Transduction, Genetic
chemical_list: D011994:Recombinant Proteins; D007371:Interferon-gamma