title: Therapeutic potential of mesenchymal stem cells producing interferon-alpha in a mouse melanoma lung metastasis model.
abstract: Adult stem cells represent a potential source for cell-based therapy of cancer. The present study evaluated the potential of bone marrow-derived mesenchymal stem cells (MSC), genetically modified to express interferon (IFN)-alpha, for the treatment of lung metastasis in an immunocompetent mouse model of metastatic melanoma. A recombinant adeno-associated virus (rAAV) 6 vector encoding IFN-alpha was used to transduce mouse bone marrow-derived MSC ex vivo. Expression and bioactivity of the transgenic protein from rAAV-transduced MSC were confirmed prior to in vivo studies. A lung metastasis model of melanoma was developed by i.v. injection of B16F10 cells into 8-week-old C57BL/6 mice. Ten days later, MSC transduced with rAAV-IFN-alpha or green fluorescent protein were intravenously injected. One cohort of mice was sacrificed to determine the effects of the therapy at an earlier time point, and another cohort was observed for long-term survival. Results indicated that systemic administration of MSC producing IFN-alpha reduced the growth of B16F10 melanoma cells and significantly prolonged survival. Immunohistochemistry analysis of the tumors from MSC-IFN-alpha-treated animals indicated an increase in apoptosis and a decrease in proliferation and blood vasculature. These data demonstrate the potential of adult MSC constitutively producing IFN-alpha to reduce the growth of lung metastasis in melanoma.
authors.affiliation: Department of Pathology, LHRB 513, 701 19th Street South, University of Alabama at Birmingham, Birmingham, Alabama 35294-0007, USA.
authors.forename: Changchun
authors.initials: C
authors.lastname: Ren
authors.forename: Sanjay
authors.initials: S
authors.lastname: Kumar
authors.forename: Diptiman
authors.initials: D
authors.lastname: Chanda
authors.forename: Jian
authors.initials: J
authors.lastname: Chen
authors.forename: John D
authors.initials: JD
authors.lastname: Mountz
authors.forename: Selvarangan
authors.initials: S
authors.lastname: Ponnazhagan
mesh_terms: D000818:Animals; D017209:Apoptosis; D002460:Cell Line; D049109:Cell Proliferation; D000229:Dependovirus / Q000235:genetics; D005260:Female; D006801:Humans; D007370:Interferon Type I / Q000235:genetics / Q000378:metabolism*; D008175:Lung Neoplasms / Q000401:mortality / Q000473:pathology / Q000556:secondary*; D008546:Melanoma, Experimental / Q000401:mortality / Q000556:secondary / Q000628:therapy*; D045164:Mesenchymal Stem Cell Transplantation; D059630:Mesenchymal Stem Cells / Q000166:cytology / Q000378:metabolism*; D051379:Mice; D008810:Mice, Inbred C57BL; D009368:Neoplasm Transplantation; D009389:Neovascularization, Pathologic / Q000473:pathology / Q000628:therapy; D011994:Recombinant Proteins
chemical_list: D007370:Interferon Type I; D011994:Recombinant Proteins