Abstract
Background: Antiangiogenesis represents a promising approach to cancer therapy. We have previously demonstrated that the antitumor effects of endostatin, one of the most potent angiostatic agents, could be enhanced when combined with immunotherapy. Our current study evaluated whether anti-tumor immune response could also potentiate the therapeutic efficacy of another antiangiogenic drug, angiostatin. Methods and results: Using Matrigel assay, we showed that our preparation of recombinant angiostatin possessed potent anti-angiogenic activity in vivo. The antitumor effects of recombinant angiostatin were tested against weakly-immunogenic 3LL Lewis lung carcinoma versus its highly immunogenic variant 3LL-C75. We showed that angiostatin inhibited the growth of 3LL-C75 more potently than that of 3LL tumor, suggesting that the host's immune response potentiates the antitumor effects of angiostatin. This conclusion was further supported by the finding that the antitumor activity of angiostatin against 3LL-C75 tumor was lower in immunodeficient nude mice in comparison with immunocompetent mice. Immunization of C57BL/6 mice with 3LL-C75 cells stimulated the antitumor immunity and inhibited the growth of parental 3LL tumor. Angiostatin treatment of immunized mice further enhanced the antitumor effect of tumor vaccination. Conclusion: Antitumor immune response could complete the therapeutic efficacy of angiostatin.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 577-582 |
| Number of pages | 6 |
| Journal | In Vivo |
| Volume | 16 |
| Issue number | 6 |
| State | Published - 2002 |
| Externally published | Yes |
Keywords
- Angiogenesis
- Angiostatin
- Experimental therapy
- Immunotherapy
ASJC Scopus subject areas
- General Biochemistry, Genetics and Molecular Biology
- Pharmacology