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Yan H, Kashiwaki T, Hamasaki T, Kinjo T, Teruya K, Kabayama S, Shirahata S. The neuroprotective effects of electrolyzed reduced water and its model water containing molecular hydrogen and Pt nanoparticles. BMC Proc 2011; 5 Suppl 8:P69. [PMID: 22373490 PMCID: PMC3285010 DOI: 10.1186/1753-6561-5-s8-p69] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Zhang Z, Teruya K, Eto H, Shirahata S. Fucoidan extract induces apoptosis in MCF-7 cells via a mechanism involving the ROS-dependent JNK activation and mitochondria-mediated pathways. PLoS One 2011; 6:e27441. [PMID: 22096572 PMCID: PMC3214060 DOI: 10.1371/journal.pone.0027441] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2011] [Accepted: 10/17/2011] [Indexed: 01/09/2023] Open
Abstract
Background Fucoidan extract (FE), an enzymatically digested compound with a low molecular weight, is extracted from brown seaweed. As a natural compound with various actions, FE is attractive, especially in Asian countries, for improving the therapeutic efficacy and safety of cancer treatment. The present study was carried out to investigate the anti-tumor properties of FE in human carcinoma cells and further examine the underlying mechanisms of its activities. Methodology/Principal Finding FE inhibits the growth of MCF-7, MDA-MB-231, HeLa, and HT1080 cells. FE-mediated apoptosis in MCF-7 cancer cells is accompanied by DNA fragmentation, nuclear condensation, and phosphatidylserine exposure. FE induces mitochondrial membrane permeabilization (MMP) through loss of mitochondrial membrane potential (ΔΨm) and regulation of the expression of Bcl-2 family members. Release of apoptosis-inducing factor (AIF) and cytochrome c precedes MMP. AIF release causes DNA fragmentation, the final stage of apoptosis, via a caspase-independent mitochondrial pathway. Additionally, FE was found to induce phosphorylation of c-Jun N-terminal kinase (JNK), p38, and extracellular signal-regulated kinase (ERK) 1/2, and apoptosis was found to be attenuated by inhibition of JNK. Furthermore, FE-mediated apoptosis was found to involve the generation of reactive oxygen species (ROS), which are responsible for the decrease of ΔΨm and phosphorylation of JNK, p38, and ERK1/2 kinases. Conclusions/Significance These data suggest that FE activates a caspase-independent apoptotic pathway in MCF-7 cancer cells through activation of ROS-mediated MAP kinases and regulation of the Bcl-2 family protein-mediated mitochondrial pathway. They also provide evidence that FE deserves further investigation as a natural anticancer and cancer preventive agent.
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Li Y, Nishimura T, Teruya K, Maki T, Komatsu T, Hamasaki T, Kashiwagi T, Kabayama S, Shim SY, Katakura Y, Osada K, Kawahara T, Otsubo K, Morisawa S, Ishii Y, Gadek Z, Shirahata S. Protective mechanism of reduced water against alloxan-induced pancreatic beta-cell damage: Scavenging effect against reactive oxygen species. Cytotechnology 2011; 40:139-49. [PMID: 19003114 DOI: 10.1023/a:1023936421448] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Reactive oxygen species (ROS) cause irreversible damage to biological macromolecules, resulting in many diseases. Reduced water (RW) such as hydrogen-rich electrolyzed reduced water and natural reduced waters like Hita Tenryosui water in Japan and Nordenau water in Germany that are known to improve various diseases, could protect a hamster pancreatic beta cell line, HIT-T15 from alloxan-induced cell damage. Alloxan, a diabetogenic compound, is used to induce type 1 diabetes mellitus in animals. Its diabetogenic effect is exerted via the production of ROS. Alloxan-treated HIT-T15 cells exhibited lowered viability, increased intracellular ROS levels, elevated cytosolic free Ca(2+) concentration, DNA fragmentation, decreased intracellular ATP levels and lowering of glucose-stimulated release of insulin. RW completely prevented the generation of alloxan-induced ROS, increase of cytosolic Ca(2+) concentration, decrease of intracellular ATP level, and lowering of glucose-stimulated insulin release, and strongly blocked DNA fragmentation, partially suppressing the lowering of viability of alloxan-treated cells. Intracellular ATP levels and glucose-stimulated insulin secretion were increased by RW to 2-3.5 times and 2-4 times, respectively, suggesting that RW enhances the glucose-sensitivity and glucose response of beta-cells. The protective activity of RW was stable at 4 degrees C for over a month, but was lost by autoclaving. These results suggest that RW protects pancreatic beta-cells from alloxan-induced cell damage by preventing alloxan-derived ROS generation. RW may be useful in preventing alloxan-induced type 1-diabetes mellitus.
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Teruya K, Yamashita M, Tominaga R, Nagira T, Shim SY, Katakura Y, Tokumaru S, Tokumaru K, Barnes D, Shirahata S. Fermented milk, Kefram-Kefir enhances glucose uptake into insulin-responsive muscle cells. Cytotechnology 2011; 40:107-16. [PMID: 19003111 DOI: 10.1023/a:1023926407877] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Diminution of insulin-responses in the target organ is the primary cause of non-insulin dependent diabetes mellitus (NIDDM).It is thought to be correlated to the excessive production of reactive oxygen species (ROS). In this article, we attempted to evaluate whether fermented milk, Kefram-Kefir known as an antioxidant, reduces the cellular ROS levels and can stimulate the glucose uptake in L6 skeletal muscle cells. Water-soluble or chloroform/methanol-extracted fractions from Kefram-Kefir were examined to evaluate the glucose uptake ability of L6 myotubes.As a result, the water-soluble fraction augmented the uptake of glucose in L6 myotubes both in the presence and absence of insulin stimulation. Estimation of intracellular ROS level revealed that the water-soluble fraction of Kefram-Kefir reduced the intracellular ROS level on both the undifferentiated and differentiated L6 cells. Especially, glucose uptake was augmented up to six times with the addition of water-soluble fraction in the insulin-stimulated L6 myotubes. Glucose transport determination revealed that the active agent in Kefram-Kefir was resistant to autoclave and stable in pH range from 4 to 10, and the small molecule below the molecular weight of 1000. Furthermore, this augmentation was inhibited in the presence of phosphatidylinositol 3-kinase (PI 3-kinase) inhibitor wortmannin. Considering together with the reports that PI 3-kinase is locatedin the insulin signaling pathway and the participation in the translocation of glucose transporter 4 to the cell membrane, it is suggested that the water-soluble fraction of Kefram-Kefir activates PI 3-kinase or other upstream molecules in the insulin signaling pathway, which resulted in the augmentation of glucose uptake and its specific inhibition by wortmannin.
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Ichikawa A, Shim SY, Katakura Y, Teruya K, Hashizume S, Shirahata S. Molecular analysis of cross-reactive human monoclonal antibody AE6F4 generated by in vitro immunization: Epitope mapping of AE6F4 antibody on 14-3-3 family proteins and cytokeratin 8. Cytotechnology 2011; 36:101-7. [PMID: 19003320 DOI: 10.1023/a:1014060113186] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We reported previously that adenocarcinoma-reactive human monoclonal antibody AE6F4, which had been generated by in vitro immunization method, recognizes both 14-3-3protein and cytokeratin 8 (CK8). In this study, to analyze the cross-reactivity of AE6F4 antibody, epitopes of AE6F4 antibody on 14-3-3 proteins and CK8 were studied by using synthetic linear peptide scanning technology. To determine the locations of B cell epitope, 48 and 95 of decapeptides covering the entire 14-3-3 proteins and CK8, respectively,were synthesized and binding to AE6F4 antibody was examined by ELISA. The AE6F4 antibody was strongly reactive to peptides containing amino acid sequences TLWTSDTQGD in 14-3-3 proteins and INFLRQLYEE in CK8. These results indicate that AE6F4 antibody can recognize the different peptide sequences in 14-3-3 proteins and CK8.
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Shim SY, Katakura Y, Ichikawa A, Teruya K, Matsuda T, Shirahata S. Epitope analysis of human monoclonal antibody specific for rice allergenic protein generated by in vitro immunization. Cytotechnology 2011; 36:109-15. [PMID: 19003321 DOI: 10.1023/a:1014012214095] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We previously established an in vitro immunization protocol for generating antigen specific human monoclonal antibodies (mAbs). In vitro immunization was performed against the soluble protein of rice allergenic protein (RA), resulting in the generation of three B cell clones, AC7-1/F9, CB7-1/E2 and CB7-8/F5, all of which produce a RA-specific human monoclonal IgM antibody. We attempted to map the epitope regions recognized by thesem Abs to characterize their specificities. We performed two rounds of epitope mapping, rough mapping using 10-mer peptides covering the full-length RA with 5 amino acids overlapping, and fine mapping using 8-mer peptides covering the putative epitope regions from the rough mapping with 1amino acid overlapping. As a result of the fine mapping,we identified the epitope regions of these three mAbs as(45)QVWQDCCRQ(54)L, (56)AVDDGWCRCGA(67)L and(91)FPGCRRG(98)D on the RA molecule and found to be identical. Furthermore, we determined the putative core epitope regions, which are critical for mAb binding to each region, (47)WQDCC(52)R and (60)GWC(63)R. The information about the epitope region on the RA molecule,which might trigger the allergenic response, would be useful to establish a specific immunotherapy against rice allergy.
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Ye J, Li Y, Teruya K, Katakura Y, Ichikawa A, Eto H, Hosoi M, Hosoi M, Nishimoto S, Shirahata S. Enzyme-digested Fucoidan Extracts Derived from Seaweed Mozuku of Cladosiphon novae-caledoniae kylin Inhibit Invasion and Angiogenesis of Tumor Cells. Cytotechnology 2011; 47:117-26. [PMID: 19003051 DOI: 10.1007/s10616-005-3761-8] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2005] [Accepted: 03/04/2005] [Indexed: 10/25/2022] Open
Abstract
Fucoidan is a uniquely-structured sulfated polysaccharide found in the cell walls of several types of brown seaweed that has recently, especially as enzyme-digested fucoidan extract, attracted a lot attention due to its anti-tumor potential. In this study, we evaluated the effects of enzyme-digested fucoidan extracts prepared from seaweed Mozuku of Cladosiphon novae-caledoniae kylin on in vitro invasion and angiogenesis abilities of human tumor cells. First, we evaluated the effect of the fucoidan extracts on oxidative stress of tumor cells, and demonstrated that intracellular H(2)O(2) level and released H(2)O(2) from tumor cells were both greatly repressed upon the treatment with the fucoidan extracts, suggesting that fucoidan extracts ameliorate oxidative stress of tumor cells. Next, we tested for the effects of fucoidan extracts on invasion ability of human fibrosarcoma HT1080 cells, showing that fucoidan extracts significantly inhibit their invasion, possibly via suppressing matrix metalloproteinases (MMPs) MMP-2/9 activities. Further, we investigated the effects of the fucoidan extracts on angiogenesis of human uterine carcinoma HeLa cells, and found that fucoidan extracts suppressed expression and secretion of an angiogenesis factor vascular endothelial growth factor (VEGF), resulting in suppressed vascular tubules formation of tumor cells. The results taken together clarified that enzyme-digested fucoidan extracts from Cladosiphon novae-caledoniae kylin possess inhibitory effects on invasion and angiogenesis of tumor cells. These effects might, at least partially, be elicited by the antioxidative potential of enzyme digested fucoidan extracts.
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Inoue Y, Kawamoto S, Shoji M, Hashizume S, Teruya K, Katakura Y, Shirahata S. Properties of ras-amplified recombinant BHK-21 cells in protein-free culture. Cytotechnology 2011; 33:21-6. [PMID: 19002807 DOI: 10.1023/a:1008163312841] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We compared serum and protein-free cultures ofa ras-amplified recombinant BHK-21 cell line(ras-rBHK-IgG), which hyperproduces a lungcancer specific recombinant human monoclonal antibody. Ras-rBHK-IgG cells were shown to grow well, evenin protein-free medium and to be morphologicallysimilar to cells cultured in serum containing medium. However, the growth rate of ras-rBHK-IgG cellswas considerably slower in protein-free medium, whichresults in a longer maintenance period compared with cells cultured in serum containing medium. In addition, it was found that antibody production in protein-free culture had a ten times higher maximum than cells cultured in serum containing medium. On theother hand, in high density culture, using the hollowfiber bioreactor system, ras-rBHK-IgG cellscould be maintained for a month in protein-freeculture in contrast with serum culture, which onlylasted for half a month. However, the markedincrease of antibody production was not observed. A total amount of about 15 mg of the recombinantantibody, obtained in protein-free culture, was abouttwo times of that obtained in serum culture, and wasshown to be reactive to lung cancer cells in tissue. From these properties in protein-free medium, it isconcluded that protein-free culture of ras-rBHK-IgG cells is suitable for middle scaleproduction of recombinant human monoclonal antibody.
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Yamashita M, Ichikawa A, Katakura Y, Mochizuki Y, Teruya K, Kim EH, Shirahata S. Induction of basophilic and eosinophilic differentiation in the human leukemic cell line KU812. Cytotechnology 2011; 36:179-86. [PMID: 19003329 DOI: 10.1023/a:1014001322272] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We have demonstrated that an immature prebasophilic cell line,KU812 cells can be induced to differentiate into basophil-like cells when cultured with hydrocortisone (HC) with enhanced cell surface expression of FcepsilonRI, a high affinity IgE receptor. In this study, we report that sodium nitroprusside (SNP), an intracellular NO donor, also induces cell surface expression of FcepsilonRI on KU812 cells. Cell surface FcepsilonRI expression was detected in about 20% of KU812 cells treated with SNP for 14 days as well as the cells treated with HC for 7 days, while non-treated KU812 cells did not express FcepsilonRI on their cell surface. However, Wright-Giemsa staining and flowcytometry analysis of CD13 and CD15 antigens on HC and SNP treated KU812 cells demonstrated that SNP induced eosinophilic differentiation in KU812 cells differently from HC which induced basophilic differentiation. To further confirm this result, we performed RT-PCR against mRNAs specific for eosinophils, such as eosinophil-derived neurotoxin (EDN) and eosinophil peroxidase(EPO). SNP treated KU812 cells but not HC treated cells expressed EDN and EPO mRNA depending upon the induction of differentiation,clearly demonstrating that SNP induces eosinophilic differentiation in KU812 cells. To clarify that different signaling cascades were activated in HC and SNP treated KU812 cells, we analyzed activities of AP-1, NF-AT and NF-kappaB transcription factors by EMSA, which are known to be involved in signal transduction pathways downstream from the FcepsilonRI molecule of basophils. All these three transcription factors were activated in HC treated KU812 cells,but not in non-treated and SNP treated KU812 cells. These results indicate that KU812 cells are multi-potent precursor cells which can be induced to differentiate into basophils and eosinophils upon exogenous signals, and that NO is an important factor to decide the eosinophilic differentiation in KU812 cells with enhanced surface expression of FcepsilonRI, and further suggest that different signaling cascades can be activated between basophilic and eosinophilic differentiation in KU812 cells.
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Miura T, Katakura Y, Seto P, Zhang Y, Teruya K, Nishimura E, Kato M, Hashizume S, Shirahata S. Availability of oncogene activated production system for mass production of light chain of human antibody in CHO cells. Cytotechnology 2011; 35:9-16. [PMID: 19003276 DOI: 10.1023/a:1008179919857] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We previously established a ras-oncogene amplified Chinesehamster ovary (CHO) cell line, named ras clone I, as anuniversal host cell line for oncogene activated production(OAP) system to mass-produce recombinant protein by activationof the cytomegalovirus immediate early (CMV) promoter with ras protein. The lambda light chain(C5lambda) of human monoclonal antibody HB4C5 is expected tobe potentially useful for lung cancer targeting. We generated aC5lambda hyper-producing cell line by transfecting ras cloneI with the C5lambda gene expression plasmid regulated by theCMV promoter, of which productivity was 5.3 times greater thanthe hyper productive CHO cell line generated by using conventional CHO cells. Introduction of the adenovirus E1A geneinto the hyper-producing cell line derived from ras clone I resulted in further 9.5 times enhancement of the productivity,suggesting the synergistic effect of E1A and ras oncogenes on the recombinant protein production driven by the CMV promoter. In addition, intracellular accumulation of C5lambda andupregulation of BiP was found in hyper-producing cell lineswhich were introduced E1A and ras oncogene. This resultsuggests that excessive intracellular accumulation ofC5lambda protein, which might be caused by that the amount of produced C5lambda in ER is beyond the ability of CHO cells to secrete, might signal the BiP promoter. Our data imply that ras clone I is available as a general host cell for establishing the recombinant protein hyper-producing CHOcells by the OAP system, and suggest that further mass production of recombinant proteins in the OAP system can be possible by clarifying the accurate role of upregulated BiP protein.
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Watanabe K, Honda M, Watanabe T, Tsukada K, Teruya K, Kikuchi Y, Oka S, Gatanaga H. Emergence of raltegravir-resistant HIV-1 in the central nervous system. Int J STD AIDS 2011; 21:840-1. [PMID: 21297097 DOI: 10.1258/ijsa.2009.009283] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Integrase inhibitor-resistant HIV-1 was detected in the cerebrospinal fluid, but not in the plasma of a 42-year-old man with HIV encephalopathy treated with a raltegravir (RAL)-containing regimen. Raltegravir resistance may develop in the central nervous system when the virus is already multi-drug resistant because of different penetration into cerebrospinal fluid of individual antiretroviral agents.
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Teruya K, Sueda J, Arai M, Tsurumaru N, Yamakawa R, Hirata A, Hirose T. Patching retinal breaks with Seprafilm in experimental rhegmatogenous retinal detachment of rabbit eyes. Eye (Lond) 2011; 23:2256-9. [PMID: 19169237 DOI: 10.1038/eye.2008.403] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
PURPOSE To examine the short-term effect of Seprafilm for patching retinal breaks in experimental rhegmatogenous retinal detachment of rabbit eyes. METHODS Experimental retinal detachment with a break was made and repaired by fluid-gas exchange during vitreous surgery in 10 rabbit eyes. In seven eyes, Seprafilm was applied to cover iatrogenic retinal breaks entirely (study group) and in other three eyes operations were finished without Seprafilm application (control group). Funduscopic examination was carried out in both groups and in study group optical coherence tomography (OCT) was performed to observe Seprafilm on the retinal break. Eyes of study group were enucleated on 7th and 14th postoperative day for histological evaluation. RESULTS The funduscopic examination showed that the retina was reattached in all eyes of study group. Meanwhile all three eyes of control group resulted in proliferative vitreoretinopathy. OCT showed that Seprafilm adhered to the retina tightly. Funduscopic examination and OCT showed Seprafilm dissolved within 14 days. Histological examination revealed that Seprafilm adhered tightly to the retina and there was no inflammatory change at the Seprafilm application sites. CONCLUSIONS In our small number of this study, Seprafilm was found to be beneficial to patch small and posteriorly located retinal breaks in vitreous surgery for rhegmatogenous retinal detachment.
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Li Y, Hamasaki T, Nakamichi N, Kashiwagi T, Komatsu T, Ye J, Teruya K, Abe M, Yan H, Kinjo T, Kabayama S, Kawamura M, Shirahata S. Suppressive effects of electrolyzed reduced water on alloxan-induced apoptosis and type 1 diabetes mellitus. Cytotechnology 2011; 63:119-31. [PMID: 21063772 PMCID: PMC3080478 DOI: 10.1007/s10616-010-9317-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2010] [Accepted: 10/18/2010] [Indexed: 12/13/2022] Open
Abstract
Electrolyzed reduced water, which is capable of scavenging reactive oxygen species, is attracting recent attention because it has shown improved efficacy against several types of diseases including diabetes mellitus. Alloxan produces reactive oxygen species and causes type 1 diabetes mellitus in experimental animals by irreversible oxidative damage to insulin-producing β-cells. Here, we showed that electrolyzed reduced water prevented alloxan-induced DNA fragmentation and the production of cells in sub-G1 phase in HIT-T15 pancreatic β-cells. Blood glucose levels in alloxan-induced type 1 diabetes model mice were also significantly suppressed by feeding the mice with electrolyzed reduced water. These results suggest that electrolyzed reduced water can prevent apoptosis of pancreatic β-cells and the development of symptoms in type 1 diabetes model mice by alleviating the alloxan-derived generation of reactive oxygen species.
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Honda H, Gatanaga H, Matsumura J, Kamimura M, Goto K, Tsukada K, Honda M, Teruya K, Kikuchi Y, Oka S. Favourable use of non-boosted fosamprenavir in patients treated with warfarin. Int J STD AIDS 2009; 20:441. [DOI: 10.1258/ijsa.2009.009108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Teruya K, Zhang Y, Katakura Y, Shirahata S. A regulatable selective system facilitates isolation of heterologous protein hyper-producing mammalian cells without gene amplification. Cytotechnology 2008; 40:13-22. [PMID: 19003100 DOI: 10.1023/a:1023945517446] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
In this article, we describe a new method that facilitates to isolate mammalian cells inducible hyper-producing heterologous proteins. This method uses the tetracycline-inducible system to express both the selection marker and the heterologous gene, therefore, allows to increase the selection pressure by reducing the transcription of the selection maker gene. Using this method, we were able to isolate recombinant Chinese hamster ovary cells with a high efficiency. One of established clones produced the recombinant bovine beta-lactoglobulin as heterologous protein at a peak rate of 12 mug 10(-6) cells/day with an inducibility of about 100-fold. This clone was over expressed them RNA of beta-lactoglobulin and the drug resistant gene but did not amplify their genes. When cultured in a hollow fiber bioreactor, the cells were able to secrete beta-lactoglobulinover 300 mug ml(-1). This method is applicable to a broad range of eukaryotic systems and is of general value to technology for recombinant protein production.
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Dong XY, Teruya K, Katakura Y, Zhang Y, Miura T, Daimon Y, Mori T, Ohashi H, Shirahata S. A hybrid system using both promoter activation and gene amplification for establishing exogenous protein hyper-producing cell lines. Cytotechnology 2008; 43:11-7. [PMID: 19003202 DOI: 10.1023/b:cyto.0000039901.92984.7a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We previously developed a promoter-activated production (PAP) system using amplified ras oncogene to activate the cytomegalovirus (CMV) promoter controlling the foreign gene in mammalian cells. CHO cells were demonstrated to be suitable for the PAP system. Here, we show that very high-level production of a recombinant protein was achieved when the human CMV promoter was inserted into a glutamine synthetase (GS) minigene expression plasmid, pEE14. A highly productive host CHO cell line, ras clone I containing amplified ras oncogene, was further transfected with the plasmid expressing both hIL-6 gene and GS minigene, and selected with methionine sulphoximine. We were able to establish a hIL-6 hyper-producing cell line, D29, which exhibited a peak productivity rate of approximately 40 mug hIL-6 10(-6) cells day(-1) through a combination of the PAP system and the GS gene amplification system. The cellular productivity of D29 cells was about 13-fold higher than control hIL-6-producing cells derived from CHO cells whose hIL-6 gene was amplified by the GS gene amplification system, and about 5-fold higher than the I13 cells established by the PAP system, which contains amplified ras oncogene and non-amplified hIL-6 gene. When D29 cells were cultured for a month, an accumulation rate of approximately 80 mug hIL-6 ml(-1) per 3 days was achieved on the 9th day. These results indicate that this PAP and GS hybrid system enables the efficient and rapid establishment of recombinant protein hyper-producing cell lines.
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Kawahara T, Ichikawa A, Katakura Y, Teruya K, Yoshida T, Kikuchi M, Kamei M, Hashizume S, Shirahata S. Establishment of hybridomas producing cancer specific human antibodies from B cell line derived from PBL of a patient with adult T cell leukemia. Cytotechnology 2008; 36:171-7. [PMID: 19003328 DOI: 10.1023/a:1014049205434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Adult T cell leukemia (ATL) is a malignant disease characterized by tumorous proliferation of CD4(+) T cells infected with retrovirus human T cell leukemia virus Type-I (HTLV-I) and concurs with an autoimmune disease and cancer due to attenuated immune response. In this study, we established ATL patient derived B-cell line TM-1 producing cancer-specific IgM antibodies, and further characterized its antigen specificity by establishing hybridomas fused with human-mouse origin hetero-myeloma cell line RF-S1. We established three hybridoma cell lines termed 2E12, 3E9, and 3E10, which continuously secreted human IgM antibodies. Immunohistochemical staining of formalin-fixed tissue section using antibodies secreted from these hybridomas showed that these antibodies specifically recognized tumor sites of human colon adenocarcinomas. Antibody produced from hybridoma 3E9 bound to some of leukemic cell lines, but not to normal human PBL, which was evidenced by the flow cytometric analysis, indicating that antibody produced from 3E9 recognizes cell surface antigen specifically expressed in the leukemic cells.
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Matsumoto SE, Yamashita M, Katakura Y, Aiba Y, Tomimatsu K, Kabayama S, Teruya K, Shirahata S. A rapid and efficient strategy to generate antigen-specific human monoclonal antibody by in vitro immunization and the phage display method. J Immunol Methods 2008; 332:2-9. [DOI: 10.1016/j.jim.2007.12.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2007] [Revised: 11/30/2007] [Accepted: 12/05/2007] [Indexed: 11/30/2022]
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Ye J, Li Y, Hamasaki T, Nakamichi N, Komatsu T, Kashiwagi T, Teruya K, Nishikawa R, Kawahara T, Osada K, Toh K, Abe M, Tian H, Kabayama S, Otsubo K, Morisawa S, Katakura Y, Shirahata S. Inhibitory effect of electrolyzed reduced water on tumor angiogenesis. Biol Pharm Bull 2008; 31:19-26. [PMID: 18175936 DOI: 10.1248/bpb.31.19] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Vascular endothelial growth factor (VEGF) is a key mediator of tumor angiogenesis. Tumor cells are exposed to higher oxidative stress compared to normal cells. Numerous reports have demonstrated that the intracellular redox (oxidation/reduction) state is closely associated with the pattern of VEGF expression. Electrolyzed reduced water (ERW) produced near the cathode during the electrolysis of water scavenged intracellular H(2)O(2) and decreased the release of H(2)O(2) from a human lung adenocarcinoma cell line, A549, and down-regulated both VEGF transcription and protein secretion in a time-dependent manner. To investigate the signal transduction pathway involved in regulating VEGF expression, mitogen-activated kinase (MAPK) specific inhibitors, SB203580 (p38 MAPK inhibitor), PD98059 (ERK1/2 inhibitor) and JNKi (c-Jun N-terminal protein kinase inhibitor) were applied. The results showed that only PD98059 blocks VEGF expression, suggesting an important role for ERK1/2 in regulating VEGF expression in A549 cells. As well, ERW inhibited the activation of extracellular signal-regulated kinase (ERK) in a time-dependent manner. Co-culture experiments to analyze in vitro tubule formation assay revealed that A549 cell-derived conditioned medium significantly stimulated the formation of vascular tubules in all analyzed parameters; tubule total area, tubule junction, number of tubules, and total tubule length. ERW counteracted the effect of A549 cell-conditioned medium and decreased total tube length (p<0.01). The present study demonstrated that ERW down-regulated VEGF gene transcription and protein secretion through inactivation of ERK.
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Ye J, Li Y, Hamasaki T, Nakamichi N, Kawahara T, Osada K, Teruya K, Kato Y, Toh K, Abe M, Katakura Y, Noguchi K, Shirahata S. Catalyser-21(TM), a mineral water derived from leaf soil, inhibits tumor cell invasion and angiogenesis. Cytotechnology 2007; 55:61-70. [PMID: 19002995 PMCID: PMC2104553 DOI: 10.1007/s10616-007-9073-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2007] [Accepted: 03/30/2007] [Indexed: 12/11/2022] Open
Abstract
Catalyser-21(TM) is a mineral water derived from natural leaf soil containing various organic and inorganic substances. Previous reports suggested a possibility that Catalyser-21(TM) has antioxidative potential and could inhibit angiogenesis and cancer cell invasiveness. Angiogenesis is a prerequisite for cancer cells to spread to surrounding tissues. Vascular endothelial growth factor (VEGF) is a major angiogenic factor in the formation of blood capillaries by cancer cells to supply nutrients and oxygen for their sustained growth. Matrix metalloproteinase-2 (MMP-2) is another key enzyme for cancer cell metastasis. To assess the anti-angiogenic activity of Catalyser-21(TM), we first examined cell viability using a human cervical cancer cell line, HeLa, and a fibrosarcoma cell line, HT1080. The results showed that Catalyser-21(TM) decreased the viability of both cell types in a dose-dependent manner. Flow cytometric analysis proved that Catalyser-21(TM) scavenges intracellular H(2)O(2) in both cell types. RT-PCR demonstrated that both VEGF and MMP-2 gene transcription was suppressed after Catalyser-21(TM) treatment. Both Matrigel and tubule formation experiments showed an effect of Catalyser-21(TM). These results suggest that Catalyser-21(TM) has potential as an anti-tumor agent.
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Matsumoto SE, Yamashita M, Katakura Y, Noguchi E, Aiba Y, Ichikawa A, Teruya K, Shirahata S. In vitro immunization can elicit the expansion of diverse repertoire of B cells from peripheral blood mononuclear cells. Cytotechnology 2006; 52:227-33. [PMID: 19002881 DOI: 10.1007/s10616-006-9003-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2006] [Accepted: 03/09/2006] [Indexed: 10/24/2022] Open
Abstract
We previously developed an in vitro immunization (IVI) protocol of human peripheral blood mononuclear cells (PBMC) for generating antigen-specific human antibodies. In order to clarify whether IVI protocolinduces antigen-specific B cell responses in PBMC, we analyzed family gene usage and sequence of the variable region gene of immunoglobulin heavy chain (VH gene) of the antibody produced from the in vitro immunized PBMC. Sequence homology analyses of VH gene demonstrated that a larger repertoire of B cells can be sensitized with mite-extract than with cholera toxin B subunit and rice allergen. Further, antigen-specific B cells were efficiently expanded by using CpG oligodeoxynucleotide as adjuvant. These results suggest that appropriate combination of sensitizing antigen and adjuvant is primarily important for expansion of antigen-specific B cells in IVI protocol.
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Sugahara K, Tokumine J, Teruya K. Crit Care 2006; 10:P180. [DOI: 10.1186/cc4527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Xu Q, Katakura Y, Yamashita M, Fang S, Tamura T, Matsumoto SE, Aiba Y, Teruya K, Osada K, Nishikawa R, Shirahata S. IL-10 augments antibody production in in vitro immunized lymphocytes by inducing a Th2-type response and B cell maturation. Biosci Biotechnol Biochem 2005; 68:2279-84. [PMID: 15564665 DOI: 10.1271/bbb.68.2279] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
An in vitro immunization (IVI) protocol enables antigen specific antibody production from L-Leucyl-L-Leucine methyl ester (LLME)-treated human peripheral blood lymphocytes (PBL) upon antigen stimulation in the presence of IL-2, IL-4, and muramyl dipeptide. In the course of our studies, we have found that IL-10 added at the antigen sensitization significantly augmented antibody production level from the LLME-treated PBL. In the present study, we tried to demonstrate the role of IL-10 in the augmentation of antibody production in an IVI protocol by clarifying the cytokine expression profiles in CD4(+) and CD8(+) T cells. The results showed that IL-10 skewed the Th1/Th2 balance to Th2-type responses by suppressing Th1-type cytokine production and augmenting Th2-type cytokine production in CD4(+) and CD8(+) T cells, as well as in CD19(+) B cells. Furthermore, IL-10 augmented the expression of CD38, an antigen marker of plasma cells, on B cells, which clearly indicates that IL-10 promoted differentiation and maturation of B cells in an IVI protocol. These results indicate that IL-10 plays an important role in setting the cellular milieu to produce antibodies in an IVI protocol.
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Sugahara K, Tokumine J, Teruya K. Crit Care 2005; 9:P186. [DOI: 10.1186/cc3249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Kokaze A, Ishikawa M, Matsunaga N, Yoshida M, Sekine Y, Sekiguchi K, Harada M, Satoh M, Teruya K, Takeda N, Fukazawa S, Uchida Y, Takashima Y. Longevity-associated mitochondrial DNA 5178 A/C polymorphism and blood pressure in the Japanese population. J Hum Hypertens 2003; 18:41-5. [PMID: 14688809 DOI: 10.1038/sj.jhh.1001632] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
It has been reported that the mitochondrial DNA 5178 adenine/cytosine (mt5178 A/C) polymorphism, also called NADH dehydrogenase subunit 2-237 methionine/leucine (ND2-237 Met/Leu) polymorphism, may be associated with longevity in Japanese individuals, and that the mt5178A genotype may have an antiatherogenic influence. To determine whether mt5178 A/C polymorphism influences blood pressure, we genotyped 412 healthy Japanese individuals and performed a cross-sectional study investigating the relationship between genotype and blood pressure. In women with mt5178A, the mean diastolic blood pressure was higher than in those with mt5178C by 3.2 mmHg (P=0.040). In men, no statistically significant difference in systolic or diastolic blood pressure was observed between mt5178 A/C genotypes. However, a significant correlation between mt5178 A/C genotypes and the effects of habitual drinking on blood pressure was found. After adjustment for several factors, in men carrying mt5178C, both systolic and diastolic blood pressure were significantly higher in daily drinkers than in occasional (P=0.002 and 0.002, respectively) as well as nondrinkers (P<0.001 and 0.001, respectively), whereas in men carrying mt5178A, no significant differences in blood pressure were detected, irrespective of alcohol consumption. These results suggest that mt5178 A/C (=ND2-237 Met/Leu) polymorphism may influence both diastolic blood pressure in Japanese women and the blood-pressure-increasing effect of drinking in Japanese men.
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