Heat-Shock Protein 70 as a Tumor Antigen for in vitro Dendritic Cell Pulsing in Renal Cell Carcinoma Cases

Meng, Fan-Dong; Sui, Cheng-Guang; Tian, Xin; Li, Yan; Yang, Chun-Ming; Ma, Ping; Liu, Yun-Peng; Jiang, You-Hong

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자료유형: 학술저널

저자정보: Meng, Fan-Dong (The Second Lab of Cancer Research Institute, The First Hospital of China Medical University) Sui, Cheng-Guang (The Second Lab of Cancer Research Institute, The First Hospital of China Medical University) Tian, Xin (The Second Lab of Cancer Research Institute, The First Hospital of China Medical University) Li, Yan (The Second Lab of Cancer Research Institute, The First Hospital of China Medical University) Yang, Chun-Ming (Department of Urology, The First Hospital of China Medical University) Ma, Ping (The Second Lab of Cancer Research Institute, The First Hospital of China Medical University) Liu, Yun-Peng (Department of Medical Oncology, The First Hospital of China Medical University) Jiang, You-Hong (The Second Lab of Cancer Research Institute, The First Hospital of China Medical University)

저널정보: 아시아태평양암예방학회 Asian Pacific journal of cancer prevention : APJCP Asian Pacific journal of cancer prevention : APJCP 제15권 제20호

발행연도: 2014.1

수록면: 8,947 - 8,950 (4page)

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Immunological functions of heat shock proteins (HSPs) have long been recognized. In this study we aimed to efficiently purify HSP70 from renal cell carcinoma and test it as a tumor antigen for pulsing dendritic cells in vitro. HSP70 was purified from renal cell carcinoma specimens by serial column chromatography on Con A-sepharose, PD-10, ADP-agarose and DEAE-cellulose, and finally subjected to fast protein liquid chromatography (FPLC). Dendritic cells derived from the adherent fraction of peripheral blood mononuclear cells were cultured in the presence of IL-4 and GM-CSF and exposed to tumor HSP70. After 24 hours, dendritic cells were phenotypically characterized by flow cytometry. T cells obtained from the non-adherent fraction of peripheral blood mononuclear cells were then co-cultured with HSP70-pulsed dendritic cells and after 3 days T cell cytotoxicity towards primary cultured renal cell carcinoma cells was examined by Cell Counting Kit-8 assay. Dendritic cells pulsed in vitro with tumor-derived HSP70 expressed higher levels of CD83, CD80, CD86 and HLA-DR maturation markers than those pulsed with tumor cell lysate and comparable to that of dendritic cells pulsed with tumor cell lysate plus TNF-${\alpha}$. Concomitantly, cytotoxic T-lymphocytes induced by HSP70-pulsed dendritic cells presented the highest cytotoxic activity. There were no significant differences when using homologous or autologous HSP70 as the tumor antigen. HSP70 can be efficiently purified by chromatography and induces in vitro dendritic cell maturation in the absence of TNF-${\alpha}$. Conspecific HSP70 may effectively be used as a tumor antigen to pulse dendritic cells in vitro.

#Heat-shock protein 70 #dendritic cells #renal cell carcinoma #tumor antigen

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Meng, Fan-Dong

소속기관 Molecular Oncology Department of Cancer Research Institution, The First Affiliated Hospital of China