Anti-tumor vaccine adjuvant effects of IL-2 liposomes in mice immunized against MCA-102 sarcoma.

Abstract Text

MCA-102, a murine sarcoma previously reported to be non-immunogenic in C57/BL6 murine tumor models was used in a tumor vaccine preparation which included liposome encapsulated IL-2 as an adjuvant. C57/BL6 mice were immunized in the right hind footpad with irradiated MCA-102 murine sarcoma cells on days 0, 7, and 21 with or without IL-2 liposome adjuvant at 25,000 IL-2 units/injection. Mice were challenged with live tumor in the right flank on day 35. Survival of mice given IL-2 liposomes with irradiated MCA-102 cells was significantly prolonged over mice given tumor antigen with saline, and non-immunized mice. In addition, mice which received the IL-2 liposome adjuvant also had prolonged survival over those mice immunized with the additional control adjuvants of free IL-2 or dimyristoyl phosphatidyl choline (DMPC) lipid in the form of empty liposomes. IL-2 liposome plus tumor antigen also yielded a significant local protective response against live MCA-102 tumor challenge. When live tumor was injected into the site of previous immunizations on day 21 after two immunizations, the IL-2 liposome adjuvant group showed significantly delayed local growth of tumor compared to animals immunized without adjuvant, or with the adjuvants of empty liposomes or free IL-2. Finally, immunized mice were challenged with irradiated tumor cells and saline intradermally in the ears and delayed type hypersensitivity (DTH), an indicator of helper T cell response, was measured.(ABSTRACT TRUNCATED AT 250 WORDS)

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2016-09-02 00:44:26

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Citation:- Sencer SF, Rich SF, Katsanis SF, Ochoa SF, Anderson SF, .Anti-tumor vaccine adjuvant effects of IL-2 liposomes in mice immunized against MCA-102 sarcoma. European cytokine network -;2()311-8 DOI:



Details of Journal

Journal Title - European cytokine network

ISSN - 1148-5493

Volume - 2

Issue - 5

Publish date - -

Language - eng

Country - FRANCE


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