start-ver=1.4 cd-journal=joma no-vol=122 cd-vols= no-issue=2 article-no= start-page=219 end-page=226 dt-received= dt-revised= dt-accepted= dt-pub-year=2009 dt-pub=20090221 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Promotion of IL-4- and IL-5-dependent differentiation of anti-ƒÊ-primed B cells by ascorbic acid 2-glucoside en-subtitle= kn-subtitle= en-abstract= kn-abstract=The stable ascorbic acid derivative 2-O-alpha-D-glucopyranosyl-L-ascorbic acid (AA-2G) was used to investigate the role of ascorbic acid (AA) in B cell differentiation in vitro. AA-2G is stable in a solution unlike AA but is hydrolyzed by cellular alpha-glucosidase to release AA. Mouse spleen B cells were primed for 2 days with an anti-mu antibody in the presence of interleukin (IL)-4 and IL-5 and then washed and recultured with AA-2G in the presence of IL-4 and IL-5. AA-2G, but not AA, dose-dependently increased IgM production, the greatest enhancement being 150% at concentrations of more than 0.5 mM. In the absence of IL-4 and IL-5, primed B cells produced a negligible amount of IgM, and AA-2G had no effect. AA-2G-induced IgM production in the presence of IL-4 and IL-5 was inhibited by the alpha-glucosidase inhibitor castanospermine. Intracellular AA content, depleted during the priming period, increased by adding AA-2G at the start of reculture. Treatment of B cells with AA-2G resulted in an increase in the number of IgM-secreting cells, CD138-positive cells and CD45R/B220-negative cells. The number of viable cells in untreated cultures decreased gradually, but the decrease was significantly attenuated by AA-2G, resulting in about 70% more viable cells in AA-2G-treated cultures. AA-2G caused a slight but reproducible enhancement of DNA synthesis and a slight decrease in the number of cells with a sub-G1 DNA content. These results demonstrated that AA released from AA-2G enhanced cytokine-dependent IgM production in anti-mu-primed B cells and suggest that its effect is caused through promoting the differentiation of B cells to plasma cells and attenuating the gradual decrease in the number of viable cells. en-copyright= kn-copyright= en-aut-name=IchiyamaKenji en-aut-sei=Ichiyama en-aut-mei=Kenji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=MitsuzumiHitoshi en-aut-sei=Mitsuzumi en-aut-mei=Hitoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=ZhongMing en-aut-sei=Zhong en-aut-mei=Ming kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=TaiAkihiro en-aut-sei=Tai en-aut-mei=Akihiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=TsuchiokaAkihiro en-aut-sei=Tsuchioka en-aut-mei=Akihiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=KawaiSaeko en-aut-sei=Kawai en-aut-mei=Saeko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=YamamotoItaru en-aut-sei=Yamamoto en-aut-mei=Itaru kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= en-aut-name=GohdaEiichi en-aut-sei=Gohda en-aut-mei=Eiichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=8 ORCID= affil-num=1 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=2 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=3 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=4 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=5 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=6 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=7 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=8 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences en-keyword=2-O-ƒ¿-D-Glucopyranosyl-l-ascorbic acid (AA-2G) kn-keyword=2-O-ƒ¿-D-Glucopyranosyl-l-ascorbic acid (AA-2G) en-keyword=Ascorbic acid kn-keyword=Ascorbic acid en-keyword=Anti-ƒÊ antibody kn-keyword=Anti-ƒÊ antibody en-keyword=IgM production kn-keyword=IgM production en-keyword=B cell differentiation kn-keyword=B cell differentiation END start-ver=1.4 cd-journal=joma no-vol=46 cd-vols= no-issue=1 article-no= start-page=119 end-page=126 dt-received= dt-revised= dt-accepted= dt-pub-year=2009 dt-pub=200904 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Induction of hepatocyte growth factor production in human dermal fibroblasts and their proliferation by the extract of bitter melon pulp en-subtitle= kn-subtitle= en-abstract= kn-abstract=Hepatocyte growth factor (HGF) is useful as a potential therapeutic agent for hepatic and renal fibrosis and cardiovascular diseases through inducing proliferation of epithelial and endothelial cells. HGF inducers may also be useful as therapeutic agents for these diseases. However, there have been no reports on induction of HGF production by plant extracts or juices. An extract of bitter melon (Momordica charantia L.) pulp markedly induced HGF production. There was a time lag of 72 h before induction of HGF production after the extract addition. Its stimulatory effect was accompanied by upregulation of HGF gene expression. Increases in mitogen-activated protein kinases (MAPKs) were observed from 72 h after the extract addition. Inhibitors of MAPKs suppressed the extract-induced HGF production. The extract also stimulated cell proliferation. Both activities for induction of HGF production and cell proliferation were eluted together in a single peak with 14,000 Da on gel filtration. The results indicate that bitter melon pulp extract induced HGF production and cell proliferation of human dermal fibroblasts and suggest that activation of MAPKs is involved in the HGF induction. Our findings suggest potential usefulness of the extract for tissue regeneration and provide an insight into the molecular mechanism underlying the wound-healing property of bitter melon. en-copyright= kn-copyright= en-aut-name=OnoTakehiro en-aut-sei=Ono en-aut-mei=Takehiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TsujiTomoe en-aut-sei=Tsuji en-aut-mei=Tomoe kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=SakaiMiho en-aut-sei=Sakai en-aut-mei=Miho kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=YukizakiChizuko en-aut-sei=Yukizaki en-aut-mei=Chizuko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=InoHisatoshi en-aut-sei=Ino en-aut-mei=Hisatoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=AkagiIsao en-aut-sei=Akagi en-aut-mei=Isao kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=HiramatsuKaori en-aut-sei=Hiramatsu en-aut-mei=Kaori kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= en-aut-name=MatsumotoYohsuke en-aut-sei=Matsumoto en-aut-mei=Yohsuke kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=8 ORCID= en-aut-name=SugiuraYoshihiro en-aut-sei=Sugiura en-aut-mei=Yoshihiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=9 ORCID= en-aut-name=UtoHirofumi en-aut-sei=Uto en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=10 ORCID= en-aut-name=TsubouchiHirohito en-aut-sei=Tsubouchi en-aut-mei=Hirohito kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=11 ORCID= en-aut-name=GohdaEiichi en-aut-sei=Gohda en-aut-mei=Eiichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=12 ORCID= affil-num=1 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=2 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=3 en-affil= kn-affil=Miyazaki Prefectural Food R&D Center affil-num=4 en-affil= kn-affil=Miyazaki Prefectural Food R&D Center affil-num=5 en-affil= kn-affil=Miyazaki Agricultural Research Institute affil-num=6 en-affil= kn-affil=Miyazaki Prefectural Industrial Support Foundation affil-num=7 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=8 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=9 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=10 en-affil= kn-affil=Department of Digestive Disease and Life-style Related Diseases, Health Research Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences affil-num=11 en-affil= kn-affil=Department of Digestive Disease and Life-style Related Diseases, Health Research Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences affil-num=12 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences en-keyword=Hepatocyte growth factor kn-keyword=Hepatocyte growth factor en-keyword=Bitter melon kn-keyword=Bitter melon en-keyword=Extracellular signal-regulated kinase kn-keyword=Extracellular signal-regulated kinase en-keyword=Cell proliferation kn-keyword=Cell proliferation en-keyword=Dermal fibroblast kn-keyword=Dermal fibroblast END start-ver=1.4 cd-journal=joma no-vol=366 cd-vols= no-issue=1 article-no= start-page=110 end-page=116 dt-received= dt-revised= dt-accepted= dt-pub-year=2008 dt-pub=20080201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Inhibition of tumor-stromal interaction through HGF/Met signaling by valproic acid en-subtitle= kn-subtitle= en-abstract= kn-abstract=Hepatocyte growth factor (HGF), which is produced by surrounding stromal cells, including fibroblasts and endothelial cells, has been shown to be a significant factor responsible for cancer cell invasion mediated by tumor-stromal interactions. We found in this study that the anti-tumor agent valproic acid (VPA), a histone deacetylase (HDAC) inhibitor, strongly inhibited tumor-stromal interaction. VPA inhibited HGF production in fibroblasts induced by epidermal growth factor (EGF), platelet-derived growth factor, basic fibroblast growth factor, phorbol 12-myristate 13-acetate (PMA) and prostaglandin E-2 without any appreciable cytotoxic effect. Other HDAC inhibitors, including butyric acid and trichostatin A (TSA), showed similar inhibitory effects on HGF production stimulated by various inducers. Up-regulations of HGF gene expression induced by PMA and EGF were also suppressed by VPA and TSA. Furthermore, VPA significantly inhibited HGF-induced invasion of HepG2 hepatocellular carcinoma cells. VPA, however, did not affect the increases in phosphorylation of MAPK and Akt in HGF-treated HepG2 cells. These results demonstrated that VPA inhibited two critical processes of tumor-stromal interaction, induction of fibroblastic HGF production and HGF-induced invasion of HepG2 cells, and suggest that those activities serve for other anti-tumor mechanisms of VPA besides causing proliferation arrest, differentiation, and/or apoptosis of tumor cells. en-copyright= kn-copyright= en-aut-name=MatsumotoYohsuke en-aut-sei=Matsumoto en-aut-mei=Yohsuke kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=MotokiTakahiro en-aut-sei=Motoki en-aut-mei=Takahiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=KubotaSatoshi en-aut-sei=Kubota en-aut-mei=Satoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=TakigawaMasaharu en-aut-sei=Takigawa en-aut-mei=Masaharu kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=TsubouchiHirohito en-aut-sei=Tsubouchi en-aut-mei=Hirohito kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=GohdaEiichi en-aut-sei=Gohda en-aut-mei=Eiichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= affil-num=1 en-affil= kn-affil=Department of Immunochemistry, Okayama University, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=2 en-affil= kn-affil=Department of Immunochemistry, Okayama University, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=3 en-affil= kn-affil=Department of Biochemistry and Molecular Dentistry, Okayama University, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=4 en-affil= kn-affil=Department of Biochemistry and Molecular Dentistry, Okayama University, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=5 en-affil= kn-affil=Digestive Disease and Life-style Related Disease, Health Research Human and Environmental Sciences, Kagoshima University, Graduate School of Medicine and Dental Sciences affil-num=6 en-affil= kn-affil=Department of Immunochemistry, Okayama University, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences en-keyword=hepatocyte growth factor kn-keyword=hepatocyte growth factor en-keyword=valproic acid kn-keyword=valproic acid en-keyword=histone deacetylase inhibitor kn-keyword=histone deacetylase inhibitor en-keyword=butyric acid kn-keyword=butyric acid en-keyword=trichostatin A kn-keyword=trichostatin A en-keyword=induction kn-keyword=induction en-keyword=tumor invasion kn-keyword=tumor invasion en-keyword=dermal fibroblast kn-keyword=dermal fibroblast END start-ver=1.4 cd-journal=joma no-vol=8 cd-vols= no-issue=3 article-no= start-page=508 end-page=513 dt-received= dt-revised= dt-accepted= dt-pub-year=2008 dt-pub=20080630 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Induction of cytolytic activity and interferon-gamma production in murine natural killer cells by polymyxins B and E en-subtitle= kn-subtitle= en-abstract= kn-abstract=

Natural killer (NK) cells are the primary effector cells of the innate immune system and have well-established roles in tumor rejection and resistance to viruses, bacteria and certain parasites. There is a need for more specific immune modulators of NK cell activity that tack the wide-ranging side effects of NK cell-stimulatory interleukins. The polycationic antibiotic polymyxin B (PMB) has been shown to have a unique ability to enhance activities of some immune cells, independent of its antibiotic properties. Here we report that both PMB and its analog potymyxin E (PME) markedly enhanced the activity of NK cells enriched from the murine spleen. Maximal activation of NK cell activity was obtained after 24 h of incubation with PMB at a dose of 300 mu g/ml. PMB nonapeptide, one of the two PMB domains, and PME methanesulfonate, the negatively charged derivative of PME, had little effect on NK cell activity. PMB induced interferon (IFN)-gamma and tumor necrosis factor-a production in NK cells. Proliferation of NK cells in vitro was significantly stimulated by being incubated with PMB. Administration of PMB to mice for 7 consecutive days stimulated splenic NK cell activity and increased NK cell populations in the spleen. These results suggest that the polycationic antibiotics PMB and PME may up-regulate innate and adaptive immune responses by induction of NK cell activity and IFN-gamma production.

en-copyright= kn-copyright= en-aut-name=ZhongMing en-aut-sei=Zhong en-aut-mei=Ming kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=KadotaYusuke en-aut-sei=Kadota en-aut-mei=Yusuke kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=ShimizuYoshio en-aut-sei=Shimizu en-aut-mei=Yoshio kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=GohdaEiichi en-aut-sei=Gohda en-aut-mei=Eiichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=2 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=3 en-affil= kn-affil=Bizen Chemical Co., Ltd affil-num=4 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences en-keyword=polymyxin B (PMB) kn-keyword=polymyxin B (PMB) en-keyword=polymyxin E (PME) kn-keyword=polymyxin E (PME) en-keyword=NK cells kn-keyword=NK cells en-keyword=IFN-gamma kn-keyword=IFN-gamma END start-ver=1.4 cd-journal=joma no-vol=250 cd-vols= no-issue=1-2 article-no= start-page=14 end-page=23 dt-received= dt-revised= dt-accepted= dt-pub-year=2008 dt-pub=20080630 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Differentiation of murine B cells induced by chondroitin sulfate B en-subtitle= kn-subtitle= en-abstract= kn-abstract=

A two-step culture system was used to investigate the role of chondroitin sulfate (CS) B, which is mitogenic to B cells, in differentiation of B cells. Mouse spleen B cells were incubated for 3 days with CSB in the presence of interleukin (IL)-4 and IL-5. After washing, the cells were replated at 10(5) viable cells/well and recultured without CSB in the presence of IL-4 and IL-5. CSB dose-dependently increased IgM production, the greatest enhancement being 450%. Dextran sulfate had a similar effect, whereas other glycosaminoglycans, CSA, CSC, heparin and hyaluronic acid, were marginally effective. Treatment of B cells with CSB resulted in increases in the number of IgM-secreting cells and numbers of CD138-positive cells and CD45R/B220-negative cells. CSB-induced IgM production was inhibited by the protein kinase C (PKC) inhibitor GF109203X but not by the phosphatidylinositol 3-kinase (P13K) inhibitor wortmannin. These results demonstrated that CSB promoted differentiation of B cells in the presence of IL-4 and IL-5 and suggested that PKC but not P13K is crucial for CSB-induced IgM production.

en-copyright= kn-copyright= en-aut-name=YoshiharaRitsuko en-aut-sei=Yoshihara en-aut-mei=Ritsuko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=AoyamaEriko en-aut-sei=Aoyama en-aut-mei=Eriko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=KadotaYusuke en-aut-sei=Kadota en-aut-mei=Yusuke kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=KawaiSaeko en-aut-sei=Kawai en-aut-mei=Saeko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=GotoTomomi en-aut-sei=Goto en-aut-mei=Tomomi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=ZhongMing en-aut-sei=Zhong en-aut-mei=Ming kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=GohdaEiichi en-aut-sei=Gohda en-aut-mei=Eiichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= affil-num=1 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=2 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=3 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=4 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=5 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=6 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=7 en-affil= kn-affil=Department of Immunochemistry, Division of Pharmaceutical Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences en-keyword=chondroitin sulfate B (CSB) kn-keyword=chondroitin sulfate B (CSB) en-keyword=murine B cells kn-keyword=murine B cells en-keyword=IgM kn-keyword=IgM en-keyword=differentiation kn-keyword=differentiation en-keyword=CD138 kn-keyword=CD138 en-keyword=protein kinase C kn-keyword=protein kinase C END