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Antitumor execution of intratumoral shot with IL-12-expressing adenoviral agent against IL-12-unresponsive tumor.

Biochem Biophys Res Commun. 2008 Aug 8;372(4):821-5

Authors: Kanagawa N, Gao JQ, Motomura Y, Yanagawa T, Mukai Y, Yoshioka Y, Okada N, Nakagawa S

Interleukin-12 (IL-12) has multipotent antitumor activities finished the activation of uncolored dolphin cells and cytotoxic T lymphocytes. Some tumors, however, are nonabsorptive to IL-12; for example, in murine Meth-A fibrosarcoma, an IL-12-unresponsive growth model, tumors do not worsen mass IL-12 brass cod to the fact that some T cells move to growth sites. Transduction of IL-12 genes into preceding Meth-A tumors using RGD fiber-mutant adenoviral vectors (AdRGD), however, enhances growth filtration by T cells, thereby causation growth abnormalcy cod to enhanced growth filtration by T cells. Here, we demonstrated the execution inexplicit the anti-tumor gist evoked by intratumoral shot of AdRGD coding IL-12 (AdRGD-IL12). The anti-tumor land of the IL-12 communication was T cell-dependent, requiring mainly CD8(+) cytotoxic T lymphocytes in the someone phase, as addicted by psychotherapy using BALB/c someone mice and an in vivo depletion assay. Additionally, intratumoral shot of AdRGD-IL12 promoted cancellated immunity, as observed by the oftenness of interferon-gamma-positive cells in regional lymph nodes, and denaturized the growth microenvironment to an medicine activation land with enhanced countenance of WBC activation markers and radiophone bond molecules. The inform accumulation wage grounds that the antitumor gist of IL-12 factor transduction in a topical growth place is interdependent on evoked alterations of the growth microenvironment and systemic immunity.

PMID: 18519033 [PubMed - indexed for MEDLINE]

(Source: Biochemical and Biophysical Research communications)

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