Effects of transforming growth factor beta1 expression in a rat colon carcinoma : growth inhibition, leukocyte infiltration and production of interleukin-10 and tumor necrosis factor alpha
Författare
Summary, in English
The cytokine transforming growth factor beta-1 (TGFbeta1), was transfected into a TGFbeta1-negative rat colon carcinoma. The growth of isografts of TGFbeta1-expressing tumors was compared to that of vector control transfectants. The TGFbeta1 transfectant grew significantly more slowly after intrahepatic isografting than did vector control and wild-type tumors. The TGFbeta1-transfected tumor tissue had significantly greater infiltration of both CD4+ and CD8+ T lymphocytes than did the vector control tumor. The tumor-infiltrating leukocytes (TIL) from TGFbeta1-transfected tumor secreted significantly more of the cytokines interleukin-10 (IL-10) and tumor necrosis factor alpha (TNFalpha) than did TIL from the vector control tumor. The TGFbeta1 transfectant also demonstrated a significantly slower outgrowth in immunodeficient SCID mice, supporting a non-T-lymphocyte-dependent mechanism for the tumor retardation. In SCID mice, the TGFbeta1-transfected tumor demonstrated significantly greater infiltration of both granulocytes and macrophages than did the vector control transfectant. We also demonstrated a direct inhibitory effect of rat TNFalpha on tumor proliferation in vitro. These results suggest that TGFbeta1 induces a local secretion of immunomodulating cytokines and that this may influence monocytes, lymphocytes and granulocytes to retard tumor outgrowth.
Avdelning/ar
Publiceringsår
2000-01
Språk
Engelska
Sidor
579-587
Publikation/Tidskrift/Serie
Cancer Immunology and Immunotherapy
Volym
48
Issue
10
Dokumenttyp
Artikel i tidskrift
Förlag
Springer
Ämne
- Cancer and Oncology
Nyckelord
- Animals
- Carcinoma
- Cell Movement
- Chimera
- Colonic Neoplasms
- Cytokines
- Growth Inhibitors
- Interleukin-10
- Lymphocytes, Tumor-Infiltrating
- Mice
- Mice, SCID
- Rats
- Rats, Inbred F344
- Rats, Inbred WF
- Recombinant Proteins
- Transforming Growth Factor beta
- Tumor Necrosis Factor-alpha
- Journal Article
- Research Support, Non-U.S. Gov't
Status
Published
Forskningsgrupp
- Experimental Pathology, Malmö
- Brain function and behavioral mechanisms in psychopathology
ISBN/ISSN/Övrigt
- ISSN: 1432-0851