Immunization with Adenoviral Vectors Carrying Recombinant IL-12 and E7 Enhanced the Antitumor Immunity against Human Papillomavirus 16-associated Tumor / Journal of the Korean Cancer Association, 대한암학회지

PURPOSE: Human papillomavirus (HPV) infection has a significant role in cervical carcinogenesis, and HPV oncoprotein E7 plays an important part in the formation and maintenance of cervical cancer. Interleukin-12 (IL-12) has been reported to induce a cellular immune response, and to suppress the tumor growth and the E7 production. Here we describe the use of adenoviral delivery of the HPV 16 E7 subunit (AdE7) along with adenoviral delivery of IL-12 (AdIL-12) in mice with HPV-associated tumors. MATERIALS AND METHODS: Mice were injected with TC-1 cells to establish TC-1 tumor, and then they were immunized with AdIL-12 and/or AdE7 intratumorally. The anti tumor effects induced by AdIL-12 and/or E7 were evaluated by measuring the size of the tumor. E7-specific antibody and INF-gamma production in sera, and the T-helper cell proliferative responses were then measured. Cytotoxic T-lymphocyte (CTL) and T cell subset depletion studies were also performed. RESULTS: Combined AdIL-12 and AdE7 infection at the tumor sites significantly enhanced the antitumor effects more than that of AdIL-12 or AdE7 single infection. This combined infection resulted in regression of the 9 mm sized tumors in 80% of animals as compare to the PBS group. E7-specific antibody and INF-gamma production in the sera, and the T-helper cell proliferative responses were significantly higher with coinfection of AdIL-12 and AdE7 than with AdIL-12 or AdE7 alone. CTL response induced by AdIL-12 and AdE7 in the coinjected group suggested that tumor suppression was mediated by mostly CD8+ and only a little by the CD4+ T cells. CONCLUSION: IL-12 and E7 application using adenovirus vector showed antitumor immunity effects against TC-1 tumor, and this system could be use in clinical applications for HPV-associated cancer.

The Gene Expression Profile Using cDNA microarray after treatment Arsenic Compound (As2O3, As4O6) in SiHa Cell / 대한산부인과학회잡지

OBJECTIVE: To obtain information on the growth inhibition effect of arsenic compounds and gene expression profiles using cDNA microarray technique in SiHa cell lines. METHODS: We cultured 103 SiHa cell in 96 well plate and we investigated growth inhibition effects using MTT assay and also we performed gene expression profile experiment using 384 cDNA chip in SiHa cell after exposure of arsenics (As2O3, As4O6 - 1 (micro)M) for 48 hrs. RESULTS: Arsenics (As2O3, As4O6) inhibit the growth of SiHa cells (As2O3: 0.5, 1, 2, 3, 4, 5 (micro)M - 9.2, 56, 89, 93, 96, 96%, As4O6: 0.5, 1, 2, 3, 4, 5 (micro)M- 54, 84, 84, 85, 85, 87%) in 4 days culture. As2O3 and As4O6 induced apoptosis in SiHa cells. After exposure of As2O3, 47 genes were changed more than 2 times (eg, thymidylate synthetase, cyclin B1, CDC 20). In case of As4O6, 78 genes were changed more than 2 times (eg, CDC 20, cyclin B1, primase, proliferating cell nuclear antigen). CONCLUSION: we observed arsenic compound (As2O3, As4O6) inhibit the growth of SiHa cell. In gene expression profiling experiment, 78 genes was changed the expression level 2 times more than that of reference RNA after treatment of As4O6 and 47 genes after treatment of As2O3. Through these result, we thought more study need in functional genomics after arsenic treated cervical cancer cells.

A case of gastrointestinal stromal tumor of ileum preoperatively diagnosed as extrauterine myoma / 대한산부인과학회잡지

Gastrointestinal stromal tumor (GIST) of ileum is a rare tumor of gastrointestial tract that arise from primitive mesenchymal cells. GIST occur predominantly in persons over 40 years of age with an equal sex incidence. GIST expresses a heterogenous clinical course and the most important prognostic factors are tumor size, site, degree of mitotic activity, tumor necrosis. We report a case of GIST of ileum, which was misdiagnosed as extrauterine leiomyoma preoperatively.