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KWON, SANGHOON,KIM, DONGBUM,PARK, BYOUNG KWON,WU, GUANG,PARK, MIN CHUL,HA, YANG-WHA,KWON, HYUNG-JOO,LEE, YOUNGHEE Spandidos Publications 2013 Oncology reports Vol.29 No.2
<P>The innovation of a peptide vaccine strategy may contribute to the development of efficacious and convenient cancer vaccines. Recently, we formulated an efficacious peptide vaccine without carriers using the natural phosphodiester bond CpG-DNA and a special liposome complex [Lipoplex(O)]. The peptide vaccine targeting a tumor antigen, transmembrane 4 superfamily member 5 protein (TM4SF5), was confirmed to have preventive and therapeutic effects in a mouse hepatocellular carcinoma (HCC) model. In this study, we demonstrated that the isotype-switched (IgM(-)IgD(-)) B cell population increased after immunization and that the functional memory response persisted for at least 70 days after the final immunization of mice. Delayed implantation of BNL-HCC cells significantly induced the peptide-specific IgG2a production in the immunized mice. Accordingly, tumor growth was inhibited and the survival rate increased. These results suggest that our peptide vaccine induces memory response, which is essential for cancer vaccine application.</P>
Kwon, Hyung-Joo,Kim, Doo-Sik 한국생화학분자생물학회 2003 BMB Reports Vol.36 No.5
The proliferation and differentiation signals of myelogeneous U937 cells are provided by extracellular stimuli, such as lipopolysaccharide (LPS) and phorbol 12-myristate 13-acetate (PMA). In a DNA-native-polyacrylamide gel assay system, we demonstrated that a particular nuclease activity is expressed in PMA-stimulated U937 cells and secreted into the culture medium. The nuclease activity was induced in U937 cells by LPS treatment, while the secretion of the enzyme was undetected in the culture medium. Therefore, it is likely that the expression and secretion of the particular nuclease in U937 cells are controlled by extracellular stimulations, such as PMA and LPS treatment.
Kwon, Hyung-Joo,Kim, Doo-Sik Korean Society for Biochemistry and Molecular Biol 2003 Journal of biochemistry and molecular biology Vol.36 No.5
The proliferation and differentiation signals of myelogeneous U937 cells are provided by extracellular stimuli, such as lipopolysaccharide (LPS) and phorbol 12-myristate 13-acetate (PMA). In a DNA-native-polyacrylamide gel assay system, we demonstrated that a particular nuclease activity is expressed in PMA-stimulated U937 cells and secreted into the culture medium. The nuclease activity was induced in U937 cells by LPS treatment, while the secretion of the enzyme was undetected in the culture medium. Therefore, it is likely that the expression and secretion of the particular nuclease in U937 cells are controlled by extracellular stimulations, such as PMA and LPS treatment.