Abstract
Immune responses may arrest tumor growth by inducing tumor dormancy. The mechanisms leading to either tumor dormancy or promotion of multistage carcinogenesis by adaptive immunity are poorly characterized. Analyzing T antigen (Tag)-induced multistage carcinogenesis in pancreatic islets, we show that Tag-specific CD4+ T cells home selectively into the tumor microenvironment around the islets, where they either arrest or promote transition of dysplastic islets into islet carcinomas. Through combined TNFR1 signaling and IFN-gamma signaling, Tag-specific CD4+ T cells induce antiangiogenic chemokines and prevent alpha(v)beta(3) integrin expression, tumor angiogenesis, tumor cell proliferation, and multistage carcinogenesis, without destroying Tag-expressing islet cells. In the absence of either TNFR1 signaling or IFN-gamma signaling, the same T cells paradoxically promote angiogenesis and multistage carcinogenesis. Thus, tumor-specific T cells can directly survey multistage carcinogenesis through cytokine signaling.
| Original language | English |
|---|---|
| Pages (from-to) | 507-18 |
| Number of pages | 12 |
| Journal | Cancer Cell |
| Volume | 13 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 2008 |
Keywords / Materials (for Non-textual outputs)
- Animals
- Antigens, Viral, Tumor
- Blood Glucose
- CD4-Positive T-Lymphocytes
- Cell Movement
- Cell Proliferation
- Cell Survival
- Cell Transformation, Neoplastic
- Cells, Cultured
- GTPase-Activating Proteins
- Immunotherapy
- Insulinoma
- Integrin alphaVbeta3
- Interferon-gamma
- Mice
- Mice, Inbred C3H
- Mice, Knockout
- Mice, Transgenic
- Neovascularization, Pathologic
- Pancreatic Neoplasms
- Receptors, Tumor Necrosis Factor, Type I
- Signal Transduction
- Th1 Cells
- Time Factors
- Whole-Body Irradiation
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