Abstract:
:The murine B16 melanoma (H-2b) was transfected with a retroviral vector containing the mouse IFN-alpha 1 gene. IFN-alpha 1-transfected cells produced IFN-alpha in vitro and exhibited an altered phenotype characterized by a decreased rate of multiplication, enhanced expression of H-2 antigens, an antiviral state to VSV, and decreased pigmentation. Control and IFN-alpha 1-transfected cells were tested for their ability to grow in syngeneic (H-2b) C57Bl/6 and allogeneic (H-2d) DBA/2 mice. IFN-alpha 1-producing B16 clones were less tumorigenic after s.c., i.p., and i.v. routes of injection than IFN-non-producer B16 clones in syngeneic C57Bl/6 mice. IFN-alpha 1-producing B16 cells were, however, totally rejected by allogeneic DBA/2 mice regardless of the routes and inocula tested, while control B16 cells grew in and killed DBA/2 mice. The total rejection of IFN-alpha 1-transfected B16 cells in allogeneic mice appeared to be dependent on T cells as these cells grew in DBA/2 nude mice. Incubation of IFN-alpha-producing clones with anti-mouse IFN-alpha/beta prior to injection into C57Bl/6 mice did not enhance their tumorigenicity. Likewise, injection of C57Bl/6 and DBA/2 mice with antibody to IFN-alpha/beta did not enhance the tumorigenicity of IFN-alpha 1-transfected cells. C57Bl/6 mice immunized with irradiated IFN-alpha 1 cells were only slightly protected against a subsequent challenge with parental B16 cells. In contrast, DBA/2 mice immunized with irradiated IFN-alpha 1 cells exhibited tumor-specific, long-lasting immunity to subsequent challenge with parental B16 cells.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Kaido T,Bandu MT,Maury C,Ferrantini M,Belardelli F,Gresser Idoi
10.1002/ijc.2910600216subject
Has Abstractpub_date
1995-01-17 00:00:00pages
221-9issue
2eissn
0020-7136issn
1097-0215journal_volume
60pub_type
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