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Bae MG, Hwang-Bo J, Lee DY, Lee YH, Chung IS. Effects of 6,8-Diprenylgenistein on VEGF-A-Induced Lymphangiogenesis and Lymph Node Metastasis in an Oral Cancer Sentinel Lymph Node Animal Model. Int J Mol Sci 2021; 22:ijms22020770. [PMID: 33466636 PMCID: PMC7828717 DOI: 10.3390/ijms22020770] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 01/10/2021] [Accepted: 01/12/2021] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND The major determining factor of prognosis of oral squamous cell carcinoma is cervical lymph node metastasis. 6,8-Diprenylgenistein (6,8-DG), an isoflavonoid isolated from Cudrania tricuspidata has been reported to have anti-microbial and anti-obesity activities. However, its effects on lymphangiogenesis and lymph node metastasis in oral cancer have not yet been reported. METHODS To investigate the in vitro inhibitory effects of 6,8-DG on VEGF-A-induced lymphangiogenesis, we performed the proliferation, tube formation, and migration assay using human lymphatic microvascular endothelial cells (HLMECs). RT-PCR, Western blot, immunoprecipitation, ELISA and co-immunoprecipitation assays were used to investigate the expression levels of proteins, and mechanism of 6,8-DG. The in vivo inhibitory effects of 6,8-DG were investigated using an oral cancer sentinel lymph node (OCSLN) animal model. RESULTS 6,8-DG inhibited the proliferation, migration and tube formation of rhVEGF-A treated HLMECs. In addition, the in vivo lymphatic vessel formation stimulated by rhVEGF-A was significantly reduced by 6,8-DG. 6,8-DG inhibited the expression of VEGF-A rather than other lymphangiogenic factors in CoCl2-treated SCCVII cells. 6,8-DG inhibited the expression and activation of VEGFR-2 stimulated by rhVEGF-A in HLMECs. Also, 6,8-DG inhibited the activation of the lymphangiogenesis-related downstream signaling factors such as FAK, PI3K, AKT, p38, and ERK in rhVEGF-A-treated HLMECs. Additionally, 6,8-DG inhibited the expression of the hypoxia-inducible factor (HIF-1α), which is involved in the expression of VEGF-A in CoCl2-treated SCCVII cells, and 6,8-DG inhibited VEGF-A signaling via interruption of the binding of VEGF-A and VEGFR-2 in HLMECs. In the VEGF-A-induced OCSLN animal model, we confirmed that 6,8-DG suppressed tumor-induced lymphangiogenesis and SLN metastasis. CONCLUSION These data suggest that 6,8-DG inhibits VEGF-A-induced lymphangiogenesis and lymph node metastasis in vitro and in vivo. Furthermore, the inhibitory effects of 6,8-DG are probably mediated by inhibition of VEGF-A expression in cancer cells and suppression of the VEGF-A/VEGFR-2 signaling pathway in HLMEC. Thus, 6,8-DG could be novel and valuable therapeutic agents for metastasis prevention and treatment of oral cancer.
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Affiliation(s)
- Mun Gyeong Bae
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin 446-701, Korea; (M.G.B.); (J.H.-B.)
| | - Jeon Hwang-Bo
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin 446-701, Korea; (M.G.B.); (J.H.-B.)
| | - Dae Young Lee
- Department of Herbal Crop Research, National Institute of Horticulture and Herbal Science, RDA, Eumseong 27709, Korea;
| | - Youn-Hyung Lee
- Department of Horticultural Biotechnology, Kyung Hee University, Yongin 17104, Korea;
| | - In Sik Chung
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin 446-701, Korea; (M.G.B.); (J.H.-B.)
- Correspondence:
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Hwang-Bo J, Park JH, Chung IS. 3-O-Acetyloleanolic acid inhibits angiopoietin-1-induced angiogenesis and lymphangiogenesis via suppression of angiopoietin-1/Tie-2 signaling. Phytother Res 2019; 34:359-367. [PMID: 31680342 DOI: 10.1002/ptr.6526] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 08/29/2019] [Accepted: 09/26/2019] [Indexed: 01/11/2023]
Abstract
Tumor angiogenesis and lymphangiogenesis are important processes in tumor progression and metastasis. The inhibitory effects of 3-O-acetyloleanolic acid (3AOA), a pentacyclic triterpenoid compound isolated from Vigna sinensis K., on tumor-induced angiogenesis and lymphangiogenesis in vitro and in vivo were studied. Angiopoietin-1 is an important angiogenic and lymphangiogenic factor secreted from colon carcinoma CT-26 cells under hypoxia conditions. 3AOA inhibited proliferation, migration, and tube formation of angiopoietin-1-treated human umbilical vein endothelial cells (HUVEC) and human lymphatic microvascular endothelial cells (HLMEC). 3AOA reduced angiogenesis and lymphangiogenesis in angiopoietin-1-stimulated Matrigel plugs. Also, 3AOA inhibited tumor growth and tumor-induced angiogenesis and lymphangiogenesis in an angiopoietin-1-induced CT-26 allograft colon carcinoma animal model. 3AOA inhibited activation of the angiopoietin-1 receptor Tie-2 and activation of the downstream signaling factors FAK, AKT, and ERK1/2 that are involved in the angiopoietin-1/Tie-2-signaling pathway. Thus, 3AOA has an inhibitory effect on angiogenesis and lymphangiogenesis induced by angiopoietin-1 both in vitro and in vivo, and the inhibitory effect of 3AOA is probably due to suppression of angiopoietin-1/Tie-2 signaling in HUVEC and HLMEC.
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Affiliation(s)
- Jeon Hwang-Bo
- Department of Genetic Engineering, Kyung Hee University, Yongin, Korea.,Graduate School of Biotechnology, Kyung Hee University, Yongin, Korea
| | - Jong-Hwa Park
- Department of Genetic Engineering, Kyung Hee University, Yongin, Korea.,Graduate School of Biotechnology, Kyung Hee University, Yongin, Korea
| | - In Sik Chung
- Department of Genetic Engineering, Kyung Hee University, Yongin, Korea.,Graduate School of Biotechnology, Kyung Hee University, Yongin, Korea
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Fu YY, Zhao J, Park JH, Choi GW, Park KY, Lee YH, Chung IS. Human colorectal cancer antigen GA733-2-Fc fused to endoplasmic reticulum retention motif KDEL enhances its immunotherapeutic effects. J Cancer Res Ther 2018; 14:S748-S757. [PMID: 30249898 DOI: 10.4103/0973-1482.199445] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Objective The aim of this is to compare the immunotherapeutic effects of human colorectal cancer antigen GA733-2 fused to the Fc fragment of antibody (GA733-2-Fc) and to Fc and endoplasmic reticulum (ER) retention motif KDEL (GA733-2-Fc-KDEL). Materials and Methods Recombinant GA733-2-Fc and GA733-2-Fc-KDEL were produced from infiltrated Nicotiana benthamiana leaves and purified by affinity chromatography. Glycan structures were determined by matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry. The allergic and immunogenic responses of recombinant GA733-2-Fc and GA733-2-Fc-KDEL were estimated in an intraperitoneally immunized mouse. The tumor regression effect of recombinant GA733-2-Fc and GA733-2-Fc-KDEL was examined using a colorectal carcinoma CT-26 animal model. Results Recombinant GA733-2-Fc contained plant-specific glycan structures including β(1,2)-xylose and α(1,3)-fucose whereas recombinant GA733-2-Fc-KDEL contained oligomannose type glycan structures. Mice immunized intraperitoneally with recombinant GA733-2-Fc and GA733-2-Fc-KDEL elicited strong GA733-2-Fc-specific immunoglobulin G (IgG) and IgA serum antibody responses. Recombinant GA733-2-Fc-KDEL reduced the production of GA733-2-Fc-specific IgE. Recombinant GA733-2-Fc-KDEL increased the production of interferon-γ. Intraperitoneal preimmunization with recombinant GA733-2-Fc and GA733-2-Fc-KDEL regressed tumor growth in a colorectal carcinoma CT-26 animal model. The tumor regression effect induced by recombinant GA733-2-Fc-KDEL was greater than that induced by recombinant GA733-2-Fc. The human and mouse colorectal carcinoma cell binding activities of recombinant GA733-2-Fc-KDEL-immunized sera were higher than those of recombinant GA733-2-Fc. Conclusions Our results suggest that GA733-2-Fc conjugated to ER-retention motif KDEL is a more efficient antigen to prevent tumor growth induced by colorectal carcinoma and minimize an allergic response.
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Affiliation(s)
- Yuan-Yuan Fu
- Department of Genetic Engineering, Graduate School of Biotechnology, Kyung Hee University, Yongin, Republic of Korea
| | - Jin Zhao
- Department of Genetic Engineering, Graduate School of Biotechnology, Kyung Hee University, Yongin, Republic of Korea
| | - Jong-Hwa Park
- Department of Genetic Engineering, Graduate School of Biotechnology, Kyung Hee University, Yongin, Republic of Korea
| | - Geun-Won Choi
- Department of Horticultural Biotechnology, Institute of Life Science and Resources, Kyung Hee University, Yongin, Republic of Korea
| | | | - Youn Hyung Lee
- Department of Horticultural Biotechnology, Institute of Life Science and Resources, Kyung Hee University, Yongin, Republic of Korea
| | - In Sik Chung
- Department of Genetic Engineering, Graduate School of Biotechnology, Kyung Hee University, Yongin, Republic of Korea
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Hwang-Bo J, Bae MG, Park JH, Chung IS. 3-O-Acetyloleanolic acid inhibits VEGF-A-induced lymphangiogenesis and lymph node metastasis in an oral cancer sentinel lymph node animal model. BMC Cancer 2018; 18:714. [PMID: 29976150 PMCID: PMC6034267 DOI: 10.1186/s12885-018-4630-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 06/25/2018] [Indexed: 01/11/2023] Open
Abstract
Background Sentinel lymph node metastasis is a common and early event in the metastatic process of head and neck squamous cell carcinoma (HNSCC) and is the most powerful prognostic factor for survival of HNSCC patients. 3-O-acetyloleanolic acid (3AOA), a pentacyclic triterpenoid compound isolated from seeds of Vigna sinensis K., has been reported to have potent anti-angiogenesis and anti-tumor activities. However, its effects on tumor-related lymphangiogenesis and lymph node metastasis are not yet understood. Methods The in vitro inhibitory effects of 3AOA on VEGF-A-induced lymphangiogenesis were investigated via in vitro experiments using mouse oral squamous cell carcinoma (SCCVII) cells and human lymphatic microvascular endothelial cells (HLMECs). The in vivo inhibitory effects of 3AOA on VEGF-A-induced lymphangiogenesis and sentinel lymph node metastasis were investigated in an oral cancer sentinel lymph node (OCSLN) animal model. Results 3AOA inhibited tumor-induced lymphangiogenesis and sentinel lymph node metastasis in an OCSLN animal model, and reduced expression of VEGF-A, a lymphangiogenic factor in hypoxia mimetic agent CoCl2-treated SCCVII cells. 3AOA inhibited proliferation, tube formation, and migration of VEGF-A-treated HLMECs. The lymphatic vessel formation that was stimulated in vivo in a by VEGF-A Matrigel plug was reduced by 3AOA. 3AOA suppressed phosphorylation of vascular endothelial growth factor (VEGFR) -1 and − 2 receptors that was stimulated by VEGF-A. In addition, 3AOA suppressed phosphorylation of the lymphangiogenesis-related downstream signaling factors PI3K, FAK, AKT, and ERK1/2. 3AOA inhibited tumor growth, tumor-induced lymphangiogenesis, and sentinel lymph node metastasis in a VEGF-A-induced OCSLN animal model that was established using VEGF-A overexpressing SCCVII cells. Conclusion 3AOA inhibits VEGF-A-induced lymphangiogenesis and sentinel lymph node metastasis both in vitro and in vivo. The anti-lymphangiogenic effects of 3AOA are probably mediated via suppression of VEGF-A/VEGFR-1 and VEGFR-2 signaling in HLMECs, and can be a useful anti-tumor agent to restrict the metastatic spread of oral cancer. Electronic supplementary material The online version of this article (10.1186/s12885-018-4630-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jeon Hwang-Bo
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin, 446-701, South Korea
| | - Mun Gyeong Bae
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin, 446-701, South Korea
| | - Jong-Hwa Park
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin, 446-701, South Korea
| | - In Sik Chung
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin, 446-701, South Korea.
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Hwang-Bo J, Park JH, Bae MG, Chung IS. Recombinant canstatin inhibits VEGF-A-induced lymphangiogenesis and metastasis in an oral squamous cell carcinoma SCC-VII animal model. Cancer Med 2016; 5:2977-2988. [PMID: 27650585 PMCID: PMC5083751 DOI: 10.1002/cam4.866] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 06/22/2016] [Accepted: 07/24/2016] [Indexed: 01/30/2023] Open
Abstract
We describe the inhibitory effects of recombinant canstatin on tumor growth and lymphangiogenesis induced by an oral squamous cell carcinoma (SCC) using an orthotropic oral SCC animal model. Recombinant canstatin treatment decreased final tumor volumes and weights, as well as densities of blood and lymphatic vessels. Lung metastasis of oral SCC was significantly reduced in recombinant canstatin‐treated animals. Recombinant canstatin reduced vascular endothelial growth factor (VEGF)‐A expression in SCC‐VII cells treated with the hypoxia mimetic agent, CoCl2. VEGF‐A induced in vivo lymphatic vessel formation in a Matrigel plug, but this was remarkably reduced in a recombinant canstatin‐treated Matrigel. Recombinant canstatin suppressed the expression of vascular endothelial growth factor receptors (VEGFR)‐1 and ‐2 stimulated by VEGF‐A. Based on immunohistochemical analysis, recombinant canstatin significantly reduced the expression of VEGF‐A, VEGFR‐1, and ‐2 in SCC‐VII‐induced tumors. Recombinant canstatin did not affect the expression of VEGF‐C or VEGFR‐3. In addition, recombinant canstatin suppressed the VEGF‐A‐induced phosphorylation of VEGFR‐1 and ‐2. Our results indicate that recombinant canstatin exhibits antitumoral and antilymphangiogenic activities against oral SCC cells. Antilymphangiogenic signaling by recombinant canstatin is probably mediated by the suppression of the integrin αvβ3/VEGFR‐1 and/or ‐2 signaling induced by VEGF‐A. Our results also suggest that recombinant canstatin has a high potential to inhibit oral SCC‐induced tumors and lymphatic metastasis.
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Affiliation(s)
- Jeon Hwang-Bo
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin, 17104, Korea
| | - Jong-Hwa Park
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin, 17104, Korea
| | - Mun Gyeong Bae
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin, 17104, Korea
| | - In Sik Chung
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin, 17104, Korea.
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Nguyen TH, Than VT, Thanh HD, Nguyen VQ, Nguyen KH, Nguyen DT, Park JH, Chung IS, Jeong DG, Chang KT, Oh TK, Kim W. The evolutionary dynamics of highly pathogenic avian influenza H5N1 in south-central Vietnam reveals multiple clades evolving from Chinese and Cambodian viruses. Comp Immunol Microbiol Infect Dis 2015; 42:21-30. [DOI: 10.1016/j.cimid.2015.08.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Revised: 08/09/2015] [Accepted: 08/18/2015] [Indexed: 11/29/2022]
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Hwang-Bo J, Park JH, Chung IS. Tumstatin induces apoptosis mediated by Fas signaling pathway in oral squamous cell carcinoma SCC-VII cells. Oncol Lett 2015; 10:1016-1022. [PMID: 26622617 DOI: 10.3892/ol.2015.3261] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Accepted: 05/07/2015] [Indexed: 11/06/2022] Open
Abstract
Oral squamous cell carcinoma is a cancer originating in the tissues lining the mouth and lips. The present study investigated the effects of recombinant tumstatin, an anti-angiogenic agent with distinct antitumor activity, on oral squamous cell carcinoma SCC-VII cells. Apoptosis was characterized by YO-PRO-1 staining, sub-G1 population, and DNA fragmentation analysis. Apoptotic mechanism of tumstatin was also investigated. The antitumor activity of tumstatin was further evaluated using an SCC-VII animal model. Recombinant tumstatin was found to decrease the viability of SCC-VII cells in a dose-dependent manner. The number of cells stained with the apoptotic marker YO-PRO-1, the sub-G1 cell population and the level of apoptotic DNA fragmentation increased in the SCC-VII cells following treatment with recombinant tumstatin. In addition, recombinant tumstatin treatment increased the expression of the Fas gene at the transcript and protein levels, and the inhibition of cell viability by recombinant tumstatin was suppressed by a neutralizing anti-Fas antibody. Furthermore, treatment with recombinant tumstatin decreased the volume and weight of tumors in C3H/HeJ mice implanted with SCC-VII cells. In conclusion, the results indicated that tumstatin induced apoptosis that is mediated by the Fas signaling pathway in SCC-VII cells and inhibited tumor growth in an SCC-VII animal model.
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Affiliation(s)
- Jeon Hwang-Bo
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin, Gyeonggi 446-701, Republic of Korea
| | - Jong-Hwa Park
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin, Gyeonggi 446-701, Republic of Korea
| | - In Sik Chung
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin, Gyeonggi 446-701, Republic of Korea
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Park SH, Kim AY, Ma SH, Kim HM, Kang HS, Maeng JS, Ko K, Chung IS, Joung YH. Purification of human carcinoma antigen GA733-2 expressed inEscherichia coliand production of its polyclonal antibody in rabbit. Anim Cells Syst (Seoul) 2015. [DOI: 10.1080/19768354.2015.1030345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Soh HS, Chung HY, Lee HH, Ajjappala H, Jang K, Park JH, Sim JS, Lee GY, Lee HJ, Han YH, Lim JW, Choi I, Chung IS, Hahn BS. Expression and functional validation of heat-labile enterotoxin B (LTB) and cholera toxin B (CTB) subunits in transgenic rice (Oryza sativa). Springerplus 2015; 4:148. [PMID: 25853032 PMCID: PMC4380882 DOI: 10.1186/s40064-015-0847-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Accepted: 01/22/2015] [Indexed: 11/10/2022]
Abstract
We expressed the heat-labile enterotoxin B (LTB) subunit from enterotoxigenic Escherichia coli and the cholera toxin B (CTB) subunit from Vibrio cholerae under the control of the rice (Oryza sativa) globulin (Glb) promoter. Binding of recombinant LTB and CTB proteins was confirmed based on GM1-ganglioside binding enzyme-linked immunosorbent assays (GM1-ELISA). Real-time PCR of three generations (T3, T4, and T5) in homozygous lines (LCI-11) showed single copies of LTB, CTB, bar and Tnos. LTB and CTB proteins in rice transgenic lines were detected by Western blot analysis. Immunogenicity trials of rice-derived CTB and LTB antigens were evaluated through oral and intraperitoneal administration in mice, respectively. The results revealed that LTB- and CTB-specific IgG levels were enhanced in the sera of intraperitoneally immunized mice. Similarly, the toxin-neutralizing activity of CTB and LTB in serum of orally immunized mice was associated with elevated levels of both IgG and IgA. The results of the present study suggest that the combined expression of CTB and LTB proteins can be utilized to produce vaccines against enterotoxigenic strains of Escherichia coli and Vibrio cholera, for the prevention of diarrhea.
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Affiliation(s)
- Ho Seob Soh
- Division of Environmental Agricultural Research, Gyeonggido Agricultural Research & Extension Services, Hwaseong, 445-784 South Korea
| | - Ha Young Chung
- Department of Agricultural Biotechnology, National Academy of Agricultural Science, Nongsaengmyeong-ro 370, Jeonju-si, Jeollabuk-do 560-550 South Korea
| | - Hyun Ho Lee
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin, 446-701 South Korea
| | - Hemavathi Ajjappala
- Department of Agricultural Biotechnology, National Academy of Agricultural Science, Nongsaengmyeong-ro 370, Jeonju-si, Jeollabuk-do 560-550 South Korea
| | - Kyoungok Jang
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin, 446-701 South Korea
| | - Jong-Hwa Park
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin, 446-701 South Korea
| | - Joon-Soo Sim
- Department of Agricultural Biotechnology, National Academy of Agricultural Science, Nongsaengmyeong-ro 370, Jeonju-si, Jeollabuk-do 560-550 South Korea
| | - Gee Young Lee
- Division of Environmental Agricultural Research, Gyeonggido Agricultural Research & Extension Services, Hwaseong, 445-784 South Korea
| | - Hyun Ju Lee
- Division of Environmental Agricultural Research, Gyeonggido Agricultural Research & Extension Services, Hwaseong, 445-784 South Korea
| | - Young Hee Han
- Division of Environmental Agricultural Research, Gyeonggido Agricultural Research & Extension Services, Hwaseong, 445-784 South Korea
| | - Jae Wook Lim
- Division of Environmental Agricultural Research, Gyeonggido Agricultural Research & Extension Services, Hwaseong, 445-784 South Korea
| | - Inchan Choi
- Department of Agricultural Biotechnology, National Academy of Agricultural Science, Nongsaengmyeong-ro 370, Jeonju-si, Jeollabuk-do 560-550 South Korea
| | - In Sik Chung
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin, 446-701 South Korea
| | - Bum-Soo Hahn
- Department of Agricultural Biotechnology, National Academy of Agricultural Science, Nongsaengmyeong-ro 370, Jeonju-si, Jeollabuk-do 560-550 South Korea
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Yoo KH, Park JH, Lee DY, Hwang-Bo J, Baek NI, Chung IS. Corosolic Acid Exhibits Anti-angiogenic and Anti-lymphangiogenic Effects on In Vitro Endothelial Cells and on an In Vivo CT-26 Colon Carcinoma Animal Model. Phytother Res 2015; 29:714-23. [PMID: 25644809 DOI: 10.1002/ptr.5306] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2014] [Revised: 01/02/2015] [Accepted: 01/08/2015] [Indexed: 11/09/2022]
Abstract
We describe the anti-angiogenic and anti-lymphangiogenic effects of corosolic acid, a pentacyclic triterpenoid isolated from Cornus kousa Burg. A mouse colon carcinoma CT-26 animal model was employed to determine the in vivo anti-angiogenic and anti-lymphangiogenic effects of corosolic acid. Corosolic acid induced apoptosis in CT-26 cells, mediated by the activation of caspase-3. In addition, it reduced the final tumor volume and the blood and lymphatic vessel densities of tumors, indicating that it suppresses in vivo angiogenesis and lymphangiogenesis. Corosolic acid inhibited the proliferation and tube formation of human umbilical vein endothelial cells and human dermal lymphatic microvascular endothelial cells. In addition, corosolic acid decreased the proliferation and migration of human umbilical vein endothelial cells stimulated by angiopoietin-1. Pretreatment with corosolic acid decreased the phosphorylation of focal adhesion kinase (FAK) and ERK1/2, suggesting that corosolic acid contains anti-angiogenic activity that can suppress FAK signaling induced by angiopoietin-1.
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Affiliation(s)
- Ki Hyun Yoo
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin, 446-701, Korea
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Yu GI, Jun SE, Cho HC, Park KO, Chung JH, Shin DH, Chung IS. Association of interleukin-10 promoter region polymorphisms with risk factors of Atherosclerosis. Int J Immunogenet 2014; 42:31-7. [PMID: 25421362 DOI: 10.1111/iji.12156] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Revised: 09/24/2014] [Accepted: 10/06/2014] [Indexed: 11/27/2022]
Abstract
Atherosclerosis is considered as an inflammatory disease, and carotid artery intima-media thickness (IMT) and carotid plaque are generally used as intermediated phenotype of atherosclerosis. The aim of this study was to investigate whether carotid IMT and plaque are associated with promoter region polymorphisms of interleukin 10 (IL-10) gene. We recruited 135 subjects from a rural area of south-eastern part of South Korea. Three polymorphisms in the promoter region of IL-10 (-1082 A/G, -819 T/C and -592 A/C) were genotyped by pyrosequencing. Carotid IMT was measured at common carotid arteries, and carotid bulbs and cardiovascular risk factors such as cholesterol, blood pressure, uric acid and homocysteine were measured using blood samples. Subjects with the minor allele (C) of -819 T/C or the minor allele (C) of -592 A/C showed lower values in carotid IMT than those with major allele homozygote of each polymorphism (P = 0.018 and P = 0.031, respectively). Subjects with carotid plaque were significantly older and showed higher values in carotid IMT, uric acid and homocysteine than those without plaque (P < 0.01, respectively). In conclusion, the promoter region polymorphisms of IL-10 gene associate with carotid IMT and plaque. Further studies with larger samples are needed to provide stronger evidence to justify anti-atheromatous properties of IL-10.
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Affiliation(s)
- G I Yu
- Department of Preventive Medicine, School of Medicine, Keimyung University, Daegu, Korea
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Chang KH, Park JH, Hwang-Bo J, Chung DK, Kim W, Chung IS. Drosophila melanogaster S2 cells are more suitable for the production of recombinant COX-1 than Trichoplusia ni BTI TN-5B1-4 cells. BIOTECHNOL BIOPROC E 2014. [DOI: 10.1007/s12257-014-0239-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kim SH, Lee TH, Lee SM, Park JH, Park KH, Jung M, Jung H, Mohamed MAA, Baek NI, Chung IS, Kim J. Cynandione A attenuates lipopolysaccharide-induced production of inflammatory mediators via MAPK inhibition and NF-κB inactivation in RAW264.7 macrophages and protects mice against endotoxin shock. Exp Biol Med (Maywood) 2014; 240:946-54. [PMID: 25361770 DOI: 10.1177/1535370214558022] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Accepted: 09/27/2014] [Indexed: 11/16/2022] Open
Abstract
Cynanchum wilfordii has been traditionally used in eastern Asia for the treatment of various diseases such as gastrointestinal diseases and arteriosclerosis. Cynandione A (CA), an acetophenone, is one of major constituents from roots of C. wilfordii. In the present study, the anti-inflammatory activities of CA were investigated in lipopolysaccharide (LPS)-treated RAW264.7 macrophages and LPS-administered C57BL/6 N mice. CA significantly decreased LPS-induced production of nitric oxide and prostaglandin E2 in a dose-dependent manner, while CA up to 200 μM did not exhibit cytotoxic activity. Our data also showed that CA significantly attenuated expression of iNOS and COX-2 in LPS-stimulated macrophages. CA inhibited phosphorylation of IκB-α and MAP kinases such as ERK and p38. Furthermore, we demonstrated that CA inhibited translocation of NF-κB to the nucleus, transcription of the NF-κB minimal promoter and NF-κB DNA binding activity. Administration of CA significantly decreased the plasma levels of pro-inflammatory cytokines such as TNF-α, IL-6, and IL-1β in LPS-injected mice and improved survival of septic mice with lethal endotoxemia. These results demonstrate that CA has effective inhibitory effects on production of inflammatory mediators via suppressing activation of NF-κB and MAPK signaling pathways, suggesting that CA may be used as a potential anti-inflammatory agent for the prevention and treatment of inflammatory diseases.
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Affiliation(s)
- Sung Hwan Kim
- Graduate School of Biotechnology and College of Life Science, Kyung Hee University, Yongin 446-701, Korea
| | - Tae Hoon Lee
- Graduate School of Biotechnology and College of Life Science, Kyung Hee University, Yongin 446-701, Korea
| | - Sang Min Lee
- Graduate School of Biotechnology and College of Life Science, Kyung Hee University, Yongin 446-701, Korea
| | - Ji Hae Park
- Graduate School of Biotechnology and College of Life Science, Kyung Hee University, Yongin 446-701, Korea
| | - Keun Hyung Park
- Graduate School of Biotechnology and College of Life Science, Kyung Hee University, Yongin 446-701, Korea
| | - Mira Jung
- Graduate School of Biotechnology and College of Life Science, Kyung Hee University, Yongin 446-701, Korea
| | - Hana Jung
- Graduate School of Biotechnology and College of Life Science, Kyung Hee University, Yongin 446-701, Korea
| | - Mohamed Antar Aziz Mohamed
- Graduate School of Biotechnology and College of Life Science, Kyung Hee University, Yongin 446-701, Korea
| | - Nam-In Baek
- Graduate School of Biotechnology and College of Life Science, Kyung Hee University, Yongin 446-701, Korea
| | - In Sik Chung
- Graduate School of Biotechnology and College of Life Science, Kyung Hee University, Yongin 446-701, Korea
| | - Jiyoung Kim
- Graduate School of Biotechnology and College of Life Science, Kyung Hee University, Yongin 446-701, Korea
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Kim DOH, Park JH, Lee B, Jang KO, Chung IS, Han YS. Phosphorylation of cyclin O, a novel cyclin family protein containing a cyclin-like domain, is involved in the activation of cyclin-dependent kinase 2. Oncol Lett 2014; 8:2769-2775. [PMID: 25364462 PMCID: PMC4214489 DOI: 10.3892/ol.2014.2530] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Accepted: 08/14/2014] [Indexed: 11/21/2022] Open
Abstract
Cell cycles, ordered series of events modulating cell growth and division, are tightly regulated by complexes containing cyclin-dependent kinases (CDKs) and cyclins. Cyclin O is a novel cyclin family protein which interacts with CDK2. However, the molecular effects of cyclin O on the activity of CDK2 have not been fully evaluated. In this study, an interaction between cyclin O and CDK2 was identified by co-immunoprecipitation and the effect of cyclin O on the kinase activity of CDK2 was investigated using cyclin O point mutants. Co-immunoprecipitation was achieved using using HEK293 human embryonic kidney cells which were transiently transfected with vectors expressing cyclin O and CDK2, which revealed that cyclin O interacted with CDK2, particularly with the active form of endogenous CDK2. Cyclin O was expressed as several different bands with molecular weights between 45 and 50 kDa, possibly due to different post-translational modifications. When co-expressed with CDK2, cyclin O appeared as a band with a molecular weight of 50 kDa. Treatment with calf intestinal phosphatase reduced the intensity of the uppermost band. Mass spectroscopic analysis of cyclin O co-expressed with CDK2 revealed that the 81st serine residue of cyclin O was phosphorylated. The in vitro kinase activity of CDK2 phosphorylating histone H1 was markedly increased in the cells overexpressing cyclin O. This activity was reduced in cells overexpressing cyclin O, in which the 81st serine had been replaced with alanine (S81A). These results suggest that cyclin O is a novel cyclin family protein that regulates CDK2 kinase activity, which is mediated by the phosphorylation of the 81st serine residue of cyclin O.
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Affiliation(s)
- DO Hyung Kim
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, Republic of Korea
| | - Jong-Hwa Park
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, Republic of Korea
| | - Bora Lee
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, Republic of Korea
| | - Kyoung Ok Jang
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, Republic of Korea
| | - In Sik Chung
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, Republic of Korea
| | - Ye Sun Han
- Department of Advanced Technology Fusion, Konkuk University, Hwayang-dong, Gwangjin-gu, Seoul 143-701, Republic of Korea
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Hwang I, Choi D, See H, Lim SI, Kim W, Chung IS, Shon DH. Development of an oral immunoadjuvant from cheonggukjang that is efficacious for both mucosal and systemic immunity. Food Sci Biotechnol 2013. [DOI: 10.1007/s10068-014-0033-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
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Cui EJ, Cho JG, Chung IS, Kim JY, Hong SG, Baek NI. New Triterpenoid Saponins, Cowpeasaponins I and II, from Cowpea Seeds (Vigna sinensis K.). B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.8.2499] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Lee AR, Yang S, Shin YH, Kim JA, Chung IS, Cho HS, Lee JJ. A comparison of the BURP and conventional and modified jaw thrust manoeuvres for orotracheal intubation using the Clarus Video System. Anaesthesia 2013; 68:931-7. [PMID: 23841798 DOI: 10.1111/anae.12282] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/21/2013] [Indexed: 11/30/2022]
Abstract
We evaluated the effects of three airway manipulation manoeuvres: (a) conventional (single-handed chin lift); (b) backward, upward and right-sided pressure (BURP) manoeuvre; and (c) modified jaw thrust manoeuvre (two-handed aided by an assistant) on laryngeal view and intubation time using the Clarus Video System in 215 patients undergoing general anaesthesia with orotracheal intubation. In the first part of this study, the laryngeal view was recorded as a modified Cormack-Lehane grade with each manoeuvre. In the second part, intubation was performed using the assigned airway manipulation. The primary outcome was the time to intubation, and the secondary outcomes were the modified Cormack-Lehane grade, the number of attempts and the overall success rate. There were significant differences in modified Cormack-Lehane grade between the three airway manipulations (p < 0.0001). Post-hoc analysis indicated that the modified jaw thrust improved the laryngeal view compared with the conventional (p < 0.0001) and the BURP manoeuvres (p < 0.0001). The BURP worsened the laryngeal view compared with the conventional manoeuvre (p = 0.0132). The time to intubation in the modified jaw thrust group was shorter than with the conventional manoeuvre (p = 0.0004) and the BURP group (p < 0.0001). We conclude that the modified jaw thrust is the most effective manoeuvre at improving the laryngeal view and shortening intubation time with the Clarus Video System.
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Affiliation(s)
- A R Lee
- Department of Anaesthesiology and Pain Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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18
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Hwang I, Choi D, See H, Kim W, Chung IS, Shon DH. Beneficial effects of the mixed adjuvant of CpG plus monophosphoryl lipid a in immunization with a recombinant protein vaccine for hepatitis A. ACTA ACUST UNITED AC 2013. [DOI: 10.1007/s13765-012-2398-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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19
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Kim MY, Song HY, Kim JH, Kim BY, Park SW, Sung DK, Park HH, Jeon SH, Chung IS, Lee BH. Silkworm 30K protein inhibits ecdysone-induced apoptosis by blocking the binding of ultraspiracle to ecdysone receptor-B1 in cultured Bm5 cells. Arch Insect Biochem Physiol 2012; 81:136-147. [PMID: 22890884 DOI: 10.1002/arch.21050] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This study investigates the mechanism through which increased 30K protein inhibits ecdysone-induced apoptosis in the Bm5 silkworm ovarian cell line. Treatment of Bm5 cells with 20-hydroxyecdysone (20E) after transfection with the pIZT/V5-His control vector triggered apoptosis, but 20E treatment did not trigger apoptosis in Bm5 cells transfected with the pIZT/30K/V5-His vector. To confirm its inhibitory effect on apoptosis, 30K protein was first purified from Escherichia coli transformed with a 30K expression vector and used to generate specific antibodies in mice. Anti-30K antiserum was used to confirm synthesis of the 30K protein in pIZT/30K/V5-His-transfected Bm5 cells and to detect 30K protein binding to the ecdysone receptor-B1 (EcR-B1). Anti-30K antiserum was used to immunoprecipitate protein complexes containing 30K from Bm5 cells transfected with pIZT/30K/V5-His vector and treated with 20E. We observed that 30K proteins bound primarily to the EcR-B1 and not to ultraspiracle (USP). Reciprocal immunoprecipitation of EcR-B1-containing complexes from Bm5 cells transfected with control pIZT/V5-His vector and treated with 20E showed that EcR-B1 bound to USP in the absence of 30K but did not bind to USP in pIZT/30K/V5-His-transfected Bm5 cells. These results demonstrate that 30K proteins block USP binding to EcR-B1 through formation of a 30K/EcR-B1 complex, resulting in inhibition of 20E-induced Bm5 cell apoptosis.
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Affiliation(s)
- Mi Young Kim
- School of Life Sciences and Biotechnology, Korea University, Seoul, Korea
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Yoo KH, Park JH, Lee DOK, Fu YY, Baek NI, Chung IS. Pomolic acid induces apoptosis in SK-OV-3 human ovarian adenocarcinoma cells through the mitochondrial-mediated intrinsic and death receptor-induced extrinsic pathways. Oncol Lett 2012; 5:386-390. [PMID: 23255955 DOI: 10.3892/ol.2012.985] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Accepted: 10/17/2012] [Indexed: 11/05/2022] Open
Abstract
The cytotoxic effect of pomolic acid (PA), a pentacyclic triterpene isolated from flowers of Osmanthus fragrans var. aurantiacus Makino, was investigated in SK-OV-3 human ovarian adenocarcinoma cells. PA dose-dependently inhibited the viability of SK-OV-3 cells. PA-induced apoptosis was further characterized by detection of cell surface annexin V and sub-G1 apoptotic cell populations. The number of cells immunostained with annexin V-fluorescein isothiocyanate (FITC) increased following treatment with PA. The sub-G1 cell populations also increased in PA-treated SK-OV-3 cells. PA induced the activation of caspase-8, -9 and -3, critical mediators of apoptosis signaling. PA decreased the mitochondrial transmembrane potential (ΔΨ(m)), resulting in the activation of caspase-9. In addition, PA increased the expression of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL)-mediated apoptosis signaling-related death receptor 5 (DR5), mediating caspase-8-involved extrinsic pathway. Taken together, our results indicate that PA induces apoptosis in SK-OV-3 cells, which is mediated by the mitochondrial-mediated intrinsic and death receptor-induced extrinsic pathways.
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Affiliation(s)
- Ki Hyun Yoo
- Department of Genetic Engineering and ; Graduate School of Biotechnology, Kyung Hee University, Yongin 446-701, Republic of Korea
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Park JO, Chang KH, Lee HH, Chung IS. Biochemical analysis of Hyphantria cunea NPV attachment to Spodoptera frugiperda 21 cells. Cytotechnology 2012; 31:159-63. [PMID: 19003136 DOI: 10.1023/a:1008007818967] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Binding characteristics of Hyphantria cunea nuclear polyhedrosis virus (HcNPV) to Spodoptera frugiperda 21 (Sf21) cells was determined. The cells displayed an affinity of 0.9 x 10(10) M(-1) with about 8900 binding sites per cell. The biochemical nature of HcNPV-binding sites on the cell surface was also partially elucidated. There were 45 to 49% reductions in HcNPV binding following the pretreatment of cells with three proteases, suggesting the involvement of a cellular protein component in virus binding. Tunicamycin, which inhibits N-linked glycosylation and the expression of some membrane proteins on the cell surface, reduced virus binding suggesting a role for glycoprotein(s) in binding. Treatment of cells with wheat germ agglutinin or neuraminidase did not measurably reduce virus binding, indicating that oligosaccharides containing N-acetylglucosamine or sialic acid are not directly involved in HcNPV attachment. The negative effect of methylamine on HcNPV binding seems to be due to the fact that HcNPV entry via an endocytic pathway is blocked by the increased pH of the endosome. Data on energy inhibitors (sodium azide and dinitrophenol) indicates that HcNPV attachment to Sf21 cells may be closely linked to viral entry via receptor-mediated endocytosis. These findings suggest that the binding site moiety has a glycoprotein component, but that direct involvement of oligosacccharides containing N-acetylglucosamine or sialic acid residues in binding is unlikely, and that HcNPV attachment to Sf21 cells might be via receptor-mediated endocytosis.
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Byun SW, Chang YJ, Chung IS, Moss SF, Kim SS. Helicobacter pylori decreases p27 expression through the delta opioid receptor-mediated inhibition of histone acetylation within the p27 promoter. Cancer Lett 2012; 326:96-104. [PMID: 22867947 DOI: 10.1016/j.canlet.2012.07.032] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2012] [Revised: 07/22/2012] [Accepted: 07/27/2012] [Indexed: 12/13/2022]
Abstract
Chronic Helicobacter pylori infection is associated with the decreased expression of the gastric tumour suppressor protein p27. Because transcription of the gene p27 may be regulated epigenetically through histone acetylation, which is mediated by G-protein coupled delta opioid receptor (DOR) stimulation, we examined whether H. pylori regulates the DOR/histone acetylation/p27 promoter pathway. The levels of acetylated histone and p300, a gene-specific histone acetyltransferase within the p27 promoter, were measured using ChIP assays. The expression of phospho-DOR was evaluated by Western blot and immunohistochemical analyses. Growth curves were constructed, and cell proliferation was assessed after BrdU incorporation. Low p27 expression in acutely H. pylori-infected AGS gastric epithelial cells and in chronically H. pylori-infected AGS-derived HS3C cells was associated with approximate 20% and 40% decreases in p27 mRNA expression, respectively, when compared to p27 mRNA levels in uninfected AGS parental cells. The low p27 mRNA levels following H. pylori infection were associated with a 15-60% reduction in p27 promoter histone H4 acetylation. The recruitment of p300 to the p27 promoter was also markedly decreased by H. pylori infection. The expression of phospho-DOR was decreased by H. pylori infection in cell lines in vitro and in H. pylori-infected human gastric mucosa in vivo. The level of cellular p27 inversely correlated with cell proliferation in HS3C cells. These results demonstrate that H. pylori decreases p27 expression by modulating the DOR and thereby inhibiting histone acetylation of the p27 promoter. These findings link low gastric p27 expression levels with increased instances of gastric carcinogenesis associated with H. pylori infection.
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Affiliation(s)
- Sang Won Byun
- Department of Internal Medicine, Uijongbu St. Mary's Hospital, The Catholic University of Korea, Uijongbu 480-717, South Korea
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Abstract
INTRODUCTION Many scoring systems have been suggested to predict the outcomes of deceased donor liver transplantations. The aims of this study were to compare the Model for End-Stage Liver Disease (MELD) score with respect to other scores among patients who underwent living donor liver transplantation (LDLT) seeking to evaluate the best system to correlate with postoperative outcomes after LDLT. METHODS We analyzed retrospectively data from 202 adult patients who underwent LDLT from January 2008 to July 2010. We calculated preoperative MELD, MELD-sodium, MELD to serum sodium ratio (MESO), integrated MELD, United Kingdom MELD, Child-Turcotte-Pugh, Acute Physiology and Chronic Health evaluation II (APACHE II), and Sequential Organ Failure Assessment (SOFA) scores in all patients. We analyzed the correlation of each score with postoperative laboratory results, as well as survival at 1, 3, 6 and 12 months after LDLT. RESULTS There was significant positive correlation between all scores and peak total bilirubin during the first 7 days after LDLT. The MELD score showed the greatest correlation with peak total bilirubin (r=0.745). APACHE II and SOFA scores at 6 months and 1 year after LDLT and MESO score at 1 year after LDLT showed acceptable discrimination performance {area under the receiver operating characteristic curves (AUC)>0.7, while other scoring systems showed poor discrimination. However, the AUCs of each score were not significantly different from the MELD score AUC. CONCLUSION The MELD score most correlated with total bilirubin after LDLT, while the APACHE II and SOFA scores seemed to correlate with mortality after LDLT.
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Affiliation(s)
- I S Chung
- Department of Anesthesiology and Pain Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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Than VT, Baek IH, Lee HY, Kim JB, Shon DH, Chung IS, Kim W. Expression of recombinant rotavirus proteins harboring antigenic epitopes of the hepatitis a virus polyprotein in insect cells. Biomol Ther (Seoul) 2012; 20:320-5. [PMID: 24130930 PMCID: PMC3794530 DOI: 10.4062/biomolther.2012.20.3.320] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Revised: 03/13/2012] [Accepted: 03/20/2012] [Indexed: 11/05/2022] Open
Abstract
Rotavirus and hepatitis A virus (HAV) spread by the fecal-oral route and infections are important in public health, especially in developing countries. Here, two antigenic epitopes of the HAV polyprotein, domain 2 (D2) and domain 3 (D3), were recombined with rotavirus VP7, generating D2/VP7 and D3/VP7, cloned in a baculovirus expression system, and expressed in Spodoptera frugiperda 9 (Sf9) insect cells. All were highly expressed, with peak expression 2 days post-infection. Western blotting and ELISA revealed that two chimeric proteins were antigenic, but only D2/VP7 was immunogenic and elicited neutralizing antibody responses against rotavirus and HAV by neutralization assay, implicating D2/VP7 as a multivalent subunit-vaccine Candidate for preventing both rotavirus and HAV infections.
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Affiliation(s)
- Van Thai Than
- Department of Microbiology, Chung-Ang University College of Medicine, Seoul 156-756
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Yoo KH, Park JH, Cui EJ, Kim KI, Kim JY, Kim J, Hong SG, Baek NI, Chung IS. 3-O-acetyloleanolic acid induces apoptosis in human colon carcinoma HCT-116 cells. Phytother Res 2012; 26:1541-6. [PMID: 22359244 DOI: 10.1002/ptr.4616] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2011] [Revised: 12/27/2011] [Accepted: 01/09/2012] [Indexed: 11/10/2022]
Abstract
The cytotoxic effect of 3-O-acetyloleanolic acid, an oleanolic acid derivative isolated from the seeds of Vigna sinensis K., was investigated in human colon carcinoma HCT-116 cells. 3-O-acetyloleanolic acid dose-dependently inhibited the viability of HCT-116 cells. Apoptosis was characterized by detection of cell surface annexin V and sub-G1 apoptotic cell populations. The number of immunostained cells with annexin V-FITC was increased after treatment with 3-O-acetyloleanolic acid. The sub-G1 cell population was also increased. Expression of TRAIL-mediated apoptosis signaling-related death receptor DR5 was increased in 3-O-acetyloleanolic acid-treated HCT-116 cells. Activation of caspase-8 and caspase-3, critical mediators of extrinsic apoptosis signaling, was also increased by 3-O-acetyloleanolic acid. The results indicate that 3-O-acetyloleanolic acid induces apoptosis in HCT-116 cells mediated by an extrinsic apoptosis signaling cascade via up-regulation of DR5.
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Affiliation(s)
- Ki Hyun Yoo
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin, Korea
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Chung HY, Hwang-Bo J, Kim SK, Baek NI, Lee YH, Chung IS, Park JH. Functional expression of Arabidopsis thaliana sterol glycosyltransferase from stably transformed Drosophila melanogaster S2 cells. BIOTECHNOL BIOPROC E 2011. [DOI: 10.1007/s12257-010-0445-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hahm SH, Park JH, Ko SI, Lee YR, Chung IS, Chung JH, Kang LW, Han YS. Knock-down of human MutY homolog (hMYH) decreases phosphorylation of checkpoint kinase 1 (Chk1) induced by hydroxyurea and UV treatment. BMB Rep 2011; 44:352-7. [PMID: 21615992 DOI: 10.5483/bmbrep.2011.44.5.352] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The effect of human MutY homolog (hMYH) on the activation of checkpoint proteins in response to hydroxyurea (HU) and ultraviolet (UV) treatment was investigated in hMYH-disrupted HEK293 cells. hMYH-disrupted cells decreased the phosphorylation of Chk1 upon HU or UV treatment and increased the phosphorylation of Cdk2 and the amount of Cdc25A, but not Cdc25C. In siMYH-transfected cells, the increased rate of phosphorylated Chk1 upon HU or UV treatment was lower than that in siGFP-transfected cells, meaning that hMYH was involved in the activation mechanism of Chk1 upon DNA damage. The phosphorylation of ataxia telangiectasia and Rad3- related protein (ATR) upon HU or UV treatment was decreased in hMYH-disrupted HEK293 and HaCaT cells. Co-immunoprecipitation experiments showed that hMYH was immunoprecipitated by anti-ATR. These results suggest that hMYH may interact with ATR and function as a mediator of Chk1 phosphorylation in response to DNA damage.
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Affiliation(s)
- Soo-Hyun Hahm
- Department of Advanced Technology Fusion, Konkuk University, Seoul, Korea
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Hwang-Bo J, Yoo KH, Park JH, Jeong HS, Chung IS. Recombinant canstatin inhibits angiopoietin-1-induced angiogenesis and lymphangiogenesis. Int J Cancer 2011; 131:298-309. [PMID: 21823121 DOI: 10.1002/ijc.26353] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2011] [Accepted: 07/21/2011] [Indexed: 01/25/2023]
Abstract
We describe the effect of recombinant canstatin, the NC1 domain of the α2 chain of Type IV collagen, on suppression of angiogenesis and lymphangiogenesis both in vitro and in vivo. Recombinant canstatin produced from stably transformed Drosophila S2 cells reduced the expression of angiopoietin-1 in hypoxia mimetic agent, CoCl(2) -treated CT-26 cells. Recombinant canstatin inhibited proliferation, tube formation and migration of human angiopoietin-1 (rhAngpt-1)-treated human umbilical vein endothelial cells (HUVEC) and lymphatic endothelial cells (LEC). Recombinant canstatin suppressed the expression of Tie-2 and vascular endothelial growth factor-3 (VEGFR-3) transcripts in rhAngpt-1-treated HUVEC and LEC, respectively. The inhibitory effect of recombinant canstatin on tumor growth was also investigated using a heterotopic CT-26 colon carcinoma animal (BALB/c mice) model. Recombinant canstatin reduced the final volume and weight of tumors, and blood and lymphatic vessel densities of tumors, which were evaluated by CD-31 and LYVE-1 immunostaining. Immunohistochemical analysis showed that recombinant canstatin dramatically reduced the expression of angiopoietin-1 in CT-26 colon carcinoma-induced tumor, but not the expression of VEGF-C. Tie-2 and VEGFR-3 expressions were also reduced in recombinant canstatin-treated tumors. These results indicate that recombinant canstatin has anti-tumoral activities against CT-26 colon carcinoma cells. Recombinant canstatin reduces the expression of angiopoietin-1 in hypoxia-induced CT-26 cells and inhibits the angiogenic and lymphangiogenic signaling induced by angiopoietin-1. Recombinant canstatin probably inhibits angiogenesis and lymphangiogenesis via suppression of the integrin-dependent FAK signaling induced by angiopoietin-1/Tie-2 and/or VEGFR-3.
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Affiliation(s)
- Jeon Hwang-Bo
- Department of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University, Yongin, Korea
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Chung HY, Lee HH, Kim KI, Chung HY, Hwang-Bo J, Park JH, Sunter G, Kim JB, Shon DH, Kim W, Chung IS. Expression of a recombinant chimeric protein of hepatitis A virus VP1-Fc using a replicating vector based on Beet curly top virus in tobacco leaves and its immunogenicity in mice. Plant Cell Rep 2011; 30:1513-21. [PMID: 21442402 DOI: 10.1007/s00299-011-1062-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2010] [Revised: 03/11/2011] [Accepted: 03/14/2011] [Indexed: 05/30/2023]
Abstract
We describe the expression and immunogenicity of a recombinant chimeric protein (HAV VP1-Fc) consisting of human hepatitis A virus VP1 and an Fc antibody fragment using a replicating vector based on Beet curly top virus (BCTV) in Agrobacterium-infiltrated Nicotiana benthamiana leaves. Recombinant HAV VP1-Fc was expressed with a molecular mass of approximately 68 kDa. Recombinant HAV VP1-Fc, purified using Protein A Sepharose affinity chromatography, elicited production of specific IgG antibodies in the serum after intraperitoneal immunization. Following vaccination with recombinant HAV VP1-Fc protein, expressions of IFN-γ and IL-4 were increased in splenocytes at the time of sacrifice. Recombinant VP1-Fc from infiltrated tobacco plants can be used as an effective experimental immunogen for research into vaccine development.
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Affiliation(s)
- Ho Yong Chung
- Department of Genetic Engineering, Graduate School of Biotechnology, Kyung Hee University, Yongin, 446-701, Korea
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Lee JM, Chung HY, Kim KI, Yoo KH, Hwang-Bo J, Chung IS, Park JH. Synthesis of double-layered rotavirus-like particles using internal ribosome entry site vector system in stably-transformed Drosophila melanogaster. Biotechnol Lett 2010; 33:41-6. [DOI: 10.1007/s10529-010-0390-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Accepted: 08/24/2010] [Indexed: 11/29/2022]
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Kim SS, Cho YS, Kim HK, Shin OR, Chae HS, Choi MG, Chung IS. [The effect of rosiglitazone on the cell proliferation and the expressions of p27 and skp2 in helicobacter pylori infected human gastric epithelial cells]. Korean J Gastroenterol 2010; 55:225-31. [PMID: 20389175 DOI: 10.4166/kjg.2010.55.4.225] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND/AIMS Ligands for peroxisome proliferator-activated receptorgamma (PPARgamma), a member of the ligand-activated nuclear receptor superfamily, exhibit anti-tumoral effects and are associated with de novo synthesis of proteins involved in regulating the cell cycle and cell survival/death. Helicobacter pylori (H. pylori) is an etiologic agent for gastric adenocarcinoma, and raises the cell turnover of gastric epithelium. The aim of this study was to investigate the effect of PPARgamma ligand rosiglitazone on the cell proliferation and the expressions of p27 and Skp2 protein in H. pylori infected gastric epithelial cells. METHODS We examined the expression of PPARgamma by Western blot in H. pylori infected AGS human gastric epithelial cells. The effect of rosiglitazone on the survival of H. pylori infected AGS cells was assessed by cell viability assay. After the treatment of rosiglitazone in H. pylori infected AGS cells, the expressions of p27 and Skp2 were assessed by Western blot. RESULTS The expression of PPARgamma protein was increased in H. pylori infected AGS cells. Cell growth was inhibited and decreased in dose- and time- dependent manner in H. pylori infected AGS cells treated with rosiglitazone. A decrease in Skp2 expression and a reciprocal increase in p27 expression were found in dose- and time-dependent manner in H. pylori infected AGS cells treated with rosiglitazone. CONCLUSIONS Rosiglitazone inhibited the growth of H. pylori infected AGS cells. Rosiglitazone attenuated Skp2 expression, thereby promoting p27 accumulation in H. pylori infected human gastric epithelial cells. Further studies will be needed to find the effects of accumulation on cell turnover in H. pylori infection and the role in the H. pylori-associated gastric carcinogenesis.
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Affiliation(s)
- Sung Soo Kim
- Departments of Internal Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea
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Lee YJ, Choi MG, Lim CH, Jung WR, Cho HS, Sung HY, Nam KW, Chang JH, Cho YK, Park JM, Kim SW, Chung IS. [Change of Clostridium difficile colitis during recent 10 years in Korea]. Korean J Gastroenterol 2010; 55:169-74. [PMID: 20357527 DOI: 10.4166/kjg.2010.55.3.169] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND/AIMS Our clinical experience and recent published literatures suggest that Clostridium difficile colitis (CDC) has become more common and potentially more pathogenic in recent years. The aim of study was to evaluate changes in the epidemiological features of CDC in hospitalized patients in Korea. METHODS We retrospectively reviewed all patients of CDC diagnosed at Kangnam St. Mary Hospital from 1998 to 2007. CDC was defined as having a positive C. difficile cytotoxicity assay, or endoscopic or pathologic evidence of CDC. RESULTS A total of 189 cases (male 73, female 116, mean age 63.3 years) of CDC were diagnosed during the study period. The prevalence of CDC increased from 1.9/10,000 patient admissions in 1998-1999 to 8.82/10,000 patient admissions in 2006-2007. One hundred sixty three indication for cases (86.2%) of patients identified a prior use of antibiotics in the 2 months preceding diagnosis. The most common antibiotic use was prophylactic use during perioperational period (33.3%) followed by pneumonia (23.3%). The overall response rate to initial antibiotics was 82.7%. One hundred seventy two (91%) patients were initially treated with metronidazole. The response rate was 84.3%. All patients with initial failure to metronidazole were successfully treated by vancomycin. The response rate of vancomycin as first treatment was 80%. Three deaths were associated with CDC despite the use of combination of metronidazole and vancomycin. CONCLUSIONS The prevalence of CDC in hospitalized patients in Korea significantly increased from 1998 to 2007.
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Affiliation(s)
- Yune Jeong Lee
- Department of Internal Medicine, The Catholic University of Korea College of Medicine, Seocho-gu, Seoul, Korea
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Chung HY, Fujioka S, Choe S, Lee S, Lee YH, Baek NI, Chung IS. Simultaneous suppression of three genes related to brassinosteroid (BR) biosynthesis altered campesterol and BR contents, and led to a dwarf phenotype in Arabidopsis thaliana. Plant Cell Rep 2010; 29:397-402. [PMID: 20169349 DOI: 10.1007/s00299-010-0830-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2009] [Revised: 01/31/2010] [Accepted: 02/04/2010] [Indexed: 05/28/2023]
Abstract
We generated transgenic lines of Arabidopsis thaliana with an RNA interference construct that expressed hairpin double-stranded RNA for DET2:DWF4:SMT2 to induce sequence-specific RNA silencing. In transgenic plants, expressions of DET2, DWF4, and SMT2 were simultaneously reduced, and the campesterol content was increased by up to 420% compared to the level in the wild-type plant. Triple knock-down of the DET2, DWF4, and SMT2 enzymes also resulted in reduction of brassinosteroid (BR)-specific biosynthesis intermediates. Transgenic plants harboring the RNA interference construct displayed a semi-dwarf phenotype due to altered development. Our findings indicate that redesigning of plant architecture is possible through simultaneous suppression of multiple genes involved in BR biosynthesis.
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Affiliation(s)
- Ho Yong Chung
- Department of Genetic Engineering, Plant Metabolism Research Center, Kyung Hee University, Yongin, 446-701, Korea
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Seok YJ, Kim KI, Yoo KH, Hwang-Bo J, Lee HH, Shon DH, Ko KS, Kang HS, Lee KJ, Oh DB, Joung YH, Chung IS. Expression and Immunogenicity of a Recombinant Chimeric Protein of Human Colorectal Cancer Antigen GA733-2 and an Fc Antibody Fragment in Stably Transformed Drosophila melanogaster S2 Cells. Appl Biochem Biotechnol 2010; 162:1435-45. [DOI: 10.1007/s12010-010-8909-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2009] [Accepted: 01/04/2010] [Indexed: 02/02/2023]
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Abstract
High-level yeast inocula was investigated as a means of overcoming the toxicity problem in ethanol fermentation of acid hydrolyzate of wood cellulose. When the inoculum level exceeded 10(8) initial cells/mL, 50% of the yeast cells survived the initial cell death period during which furfural and HMF were depleted. The fermentation thus proceeded to completion by virtue of cell regrowth. The specific ethanol productivity in batch fermentation on the basis of viable cells was comparable to that of pure glucose fermentation. Continuous fermentation with cell recycle was superior to batch fermentation in that there was no overall cell decline and the ethanol yield was substantially higher. The maximum ethanol productivity in continuous fermentation was 4.9 g/L h and it occurred at a dilution rate of 0.24 hr(-1).
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Affiliation(s)
- I S Chung
- Department of Chemical Engineering Auburn University, AL 36849, USA
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Lee JH, Lee JM, Jeon HB, Shon BH, Yang JM, Chung IS. Expression and In vitro activity of recombinant canstatin in stably transformed bombyx mori cells. J Microbiol Biotechnol 2009; 19:685-9. [PMID: 19652516 DOI: 10.4014/jmb.0808.468] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
We describe the expression of recombinant canstatin from stably transformed Bombyx mori Bm5 (Bm5) cells. Recombinant canstatin was secreted into a culture medium with a molecular mass of approximately 29 kDa. Densitometric scanning showed that the secreted canstatin accounted for approximately 91% of the total canstatin production. Recombinant canstatin was also purified to homogeneity using a simple one-step Ni-NTA affinity fractionation. The identity of the purified protein was confirmed as human canstatin by nano-LC-MS/MS analysis. Purified recombinant canstatin inhibited human endothelial cell proliferation in a dose-dependent manner. The concentration at half-maximum inhibition (ED50) for recombinant canstatin expressed in stably transformed Bm5 cells was approximately 0.64 mg/ml. A maximum production level of 11 mg/l recombinant canstatin was obtained in a T-flask culture of Bm5 cells after 6 days of incubation.
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Affiliation(s)
- Ji Hye Lee
- Graduate School of Biotechnology and Plant Metabolism Research Center, Kyung Hee University, Suwon, Korea
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Hwang-Bo J, Yoo KH, Jeong HS, Baek KH, Chung IS. Effect of recombinant canstatin on angiogenesis and lymphangiogenesis of oral squamous cell carcinomas. J Biosci Bioeng 2009. [DOI: 10.1016/j.jbiosc.2009.08.050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hwang-Bo J, Yoo KH, Jeong HS, Chung IS. Recombinant canstatin inhibits tumor growth in an orthotopic AT-84 oral squamous cell carcinoma model. Biotechnol Lett 2009; 32:189-94. [DOI: 10.1007/s10529-009-0145-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2009] [Revised: 09/13/2009] [Accepted: 09/18/2009] [Indexed: 11/30/2022]
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Shin SJ, Park CE, Baek NI, Chung IS, Park CH. Betulinic and oleanolic acids isolated from Forsythia suspensa Vahl inhibit urease activity of Helicobacter pylori. BIOTECHNOL BIOPROC E 2009. [DOI: 10.1007/s12257-008-0272-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Chung WC, Lee KM, Paik CN, Lee JR, Jung SH, Kim JD, Han SW, Chung IS. [Inter-departmental differences in the eradication therapy for Helicobacter pylori infection: a single center study]. Korean J Gastroenterol 2009; 53:221-227. [PMID: 19381054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
BACKGROUND/AIMS Eradication rates of Helicobacter pylori (H. pylori) tend to decrease over the last few years. Apart from the antibiotic resistance and patients compliance, various factors have an influence on the efficacy of eradication therapy. We analyzed the inter-departmental differences in the eradication therapy for H. pylori infection. METHODS Between January 2003 and June 2007, total 3,072 eradication regimens were prescribed to patients. Eradication rates according to departments - gastroenterology (GE), general internal medicine (IM) and family medicine (FM) - were analyzed retrospectively. RESULTS The overall eradication rate of first-line triple therapy was 82.5% and second-line quadruple therapy was 71.2%. In the department of IM and FM, the eradication therapy was applied more frequently to the patients with erosion only, not ulcer. Overall eradication rates according to the departments were 87.0% in GE, 81.1% in IM and 77.2% in FM (p=0.02 GE vs. IM and p<0.01 GE vs. FM, respectively). Eradication rate in patients with peptic ulcer was also significantly higher in GE compared with IM or FM. CONCLUSIONS In primary clinic (IM and FM), the eradication therapy was frequently applied to erosion. The eradication rates of H. pylori in GE department were significantly higher than those of IM or FM. Inter-departmental differences of the eradication rate might be caused by patients' compliance to prescribed medication.
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Affiliation(s)
- Woo Chul Chung
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Kim SS, Sung YJ, Park MK, Lim CH, Yang HJ, Kim TH, Kim CW, Kim JI, Han SW, Chung IS. [The change of cyclooxygenase-2 and inducible nitric oxide synthase in the gastric mucosa one year after eradication of Helicobacter pylori]. Korean J Gastroenterol 2008; 52:286-292. [PMID: 19077474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
BACKGROUND/AIMS The cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS), the proteins that have the role in the gastric carcinogenesis, are stimulated by H. pylori infection in the gastric mucosa. The aim of this study was to evaluate the expression of COX-2 and iNOS proteins one year after the eradication of H. pylori. METHODS Gastric antral mucosa from fifty eight patients with chronic gastritis who were all infected with H. pylori was examined for the expression of COX-2 and iNOS proteins before and one year after the eradication of H. pylori by immunohistochemical stain. RESULTS COX-2 and iNOS proteins were expressed in the epithelial cells and interstitial inflammatory cells of gastric mucosa. Percent expressions of COX-2 and iNOS were significantly decreased one year after the eradication in the patients with cured infection, but not in those having persistent H. pylori. COX-2 and iNOS expressions were well correlated with H. pylori density, acute and chronic inflammation of gastric mucosa. CONCLUSIONS The eradication of H. pylori can decrease the expression of COX-2 and iNOS in the gastric mucosa in long-term period. This seems to be due to the removal of H. pylori itself and related regression of gastric inflammation.
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Affiliation(s)
- Sung Soo Kim
- Department of Internal Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea
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Kim NY, Kim HG, Kim YH, Chung IS, Yang JM. Expression and characterization of human N-acetylglucosaminyltransferases and alpha2,3-sialyltransferase in insect cells for in vitro glycosylation of recombinant erythropoietin. J Microbiol Biotechnol 2008; 18:383-391. [PMID: 18309288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The glycans linked to the insect cell-derived glycoproteins are known to differ from those expressed mammalian cells, partly because of the low level or lack of glycosyltransferase activities. GnT II, GnT IV, GnT V, and ST3Gal IV, which play important roles in the synthesis of tetraantennary-type complex glycan structures in mammalian cells, were overexpressed in Trichoplusia ni cells by using a baculovirus expression vector. The glycosyltransferases, expressed as a fusion form with the IgG-binding domain, were secreted into the culture media and purified using IgG sepharose resin. The enzyme assay, performed using pyridylaminated-sugar chain as an acceptor, indicated that the purified glycosyltransferases retained their enzyme activities. Human erythropoietin expressed in T. ni cells (rhEPO) was subjected to in vitro glycosylation by using recombinant glycosyltransferases and was converted into complex-type glycan with terminal sialic acid. The presence of N-acetylglucosamine, galactose, and sialic acid on the rhEPO moiety was detected by a lectin blot analysis, and the addition of galactose and sialic acid to rhEPO was confirmed by autoradiography using UDP-14C-Gal and CMP-14C-Sia as donors. The in vitro glycosylated rhEPO was injected into mice, and the number of reticulocytes among the red blood cells was counted using FACS. A significant increase in the number of reticulocytes was not observed in the mice injected with in vitro glycosylated rhEPO as compared with those injected with rhEPO.
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Affiliation(s)
- Na Young Kim
- Department of Life Science, Sogang University, Seoul 121-742, Korea
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Park JH, Hwang IS, Kim KI, Lee JM, Park YM, Park CH, Chung IS. Functional expression of recombinant human ribonuclease/angiogenin inhibitor in stably transformed Drosophila melanogaster S2 cells. Cytotechnology 2008; 57:93-9. [PMID: 19003177 DOI: 10.1007/s10616-008-9126-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2007] [Accepted: 01/11/2008] [Indexed: 11/25/2022] Open
Abstract
A recombinant plasmid harboring heterologous genes coding human ribonuclease/angiogenin inhibitor (RAI) was expressed in stably transformed Drosophila melanogaster Schneider 2 (S2) cells. Stably transformed polyclonal cell populations expressing RAI were isolated after 4 weeks of selection with hygromycin B. Recombinant RAI with a molecular weight of 50 kDa was detected in the intracellular (cell) and extracellular (medium) fractions of S2 cells. Recombinant RAI was purified from the extracellular fraction using a two-step purification scheme comprised of Ni-NTA and ion-exchange chromatography. Purified RAI migrated on SDS-PAGE as a single band in the elution fraction containing 300 mM NaCl. The ribonuclease inhibitor activity of purified RAI was measured using yeast tRNA and RNase A. Purified RAI exhibited an activity of approximately 8 U mug(-1) for the inhibition of RNA degradation by RNase A. Cultivation of stably transformed S2 cells using HyQ((R))SFX-insect MP medium increased cell growth by 79% and approximately doubled the production of recombinant RAI.
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Affiliation(s)
- Jong-Hwa Park
- Department of Advanced Technology Fusion and Bio/Molecular Informatics Centers, Konkuk University, Seoul, 143-701, South Korea
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Kim N, Lee SW, Cho SI, Park CG, Yang CH, Kim HS, Rew JS, Moon JS, Kim S, Park SH, Jung HC, Chung IS. The prevalence of and risk factors for erosive oesophagitis and non-erosive reflux disease: a nationwide multicentre prospective study in Korea. Aliment Pharmacol Ther 2008; 27:173-85. [PMID: 17973646 DOI: 10.1111/j.1365-2036.2007.03561.x] [Citation(s) in RCA: 114] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Prospective nationwide multicentre studies that have evaluated endoscopic findings and reflux symptoms using a well-designed questionnaire are very rare. AIM To compare the prevalence rates of and risk factors for erosive oesophagitis and non-erosive reflux disease (NERD) in the Korean population. METHODS A gastroscopic examination was performed on 25 536 subjects who visited 40 Healthcare Centers for a health check-up. A gastro-oesophageal reflux questionnaire and multivariate analysis were used to determine the risk factors for erosive oesophagitis and NERD. RESULTS 2019 (8%) and 996 subjects (4%) had erosive oesophagitis and non-erosive reflux disease, respectively; only 58% of subjects with erosive oesophagitis had reflux symptoms. Multivariate analysis showed that the risk factors for erosive oesophagitis and NERD differed, i.e. those of erosive oesophagitis were male, a Helicobacter pylori eradication history, alcohol, body mass index > or =25 and hiatal hernia. In contrast, the risk factors for NERD were female, age <40 and > or =60 vs. 40-59 years, body mass index <23 and a monthly income <$1000, glucose > or =126 mg/dL, smoking, a stooping posture at work and antibiotic usage. CONCLUSIONS The prevalence rates of erosive oesophagitis and NERD were 8% and 4%, respectively, in Korean health check-up subjects. The risk factors for erosive oesophagitis and NERD were found to differ, which indicates that their underlying pathogeneses are distinct.
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Affiliation(s)
- N Kim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
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Kim SS, Lee YM, Kim HK, Kim JI, Chae HS, Chung IS, Park DH. [The role of gastric acid in the H. pylori-induced gastritis in mouse]. Korean J Gastroenterol 2007; 50:363-369. [PMID: 18159173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
BACKGROUND/AIMS This study was designed to investigate the role of gastric acid in the extent of H. pylori-induced gastritis. METHODS Twenty eight mice were inoculated with live H. pylori. They were allocated into four groups. Mice in group I received no treatment, group II mice were treated with sham injection, group III received 125 microg/kg body weight of pentagastrin, while group IV received 250 microg/kg body weight of pentagastrin subcutaneously three times a week. After 7 months, the mucosal pH, H. pylori density, neutrophils and monocytes infiltration, and the degree of atrophy were assessed in the stomach. RESULTS In the gastric body, the densities of H. pylori were not different among groups. The degree of neutrophil infiltration was significantly lower in group IV compared to other groups (p<0.05). The degree of monocyte infiltration was also significantly lower in group IV than group III (p<0.05). In the gastric antrum, there was no significant difference of the H. pylori density, neutrophil and monocyte infiltration, and degree of atrophy among the groups. The mice with the gastric mucosal pH lower than mean of 3.2 had significant lower level of H. pylori density (1.4 vs. 2.4, p=0.04), and infiltration of neutrophils (0.9 vs. 2.3, p=0.018), and monocytes (1.2 vs. 1.8; p=0.011) than the those with mucosal pH above 3.2 in the body of stomach. CONCLUSIONS Gastric acid plays a role in suppressing the proximal propagation of H. pylori-induced gastritis to the body of stomach.
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Affiliation(s)
- Sung Soo Kim
- Department of Internal Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea.
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Kim JI, Cheung DY, Cho SH, Park SH, Han JY, Kim JK, Han SW, Choi KY, Chung IS. Oral proton pump inhibitors are as effective as endoscopic treatment for bleeding peptic ulcer: a prospective, randomized, controlled trial. Dig Dis Sci 2007; 52:3371-6. [PMID: 17514424 DOI: 10.1007/s10620-007-9814-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2006] [Accepted: 02/15/2007] [Indexed: 01/30/2023]
Abstract
In managing patients with bleeding peptic ulcers, it has been reported that pharmacologic treatment can be an alternative to endoscopic treatment. We compared the hemostasis rates of the endoscopic treatment, hemoclipping, and the pharmacologic treatment, oral proton pump inhibitors (PPIs), in bleeding peptic ulcer. A randomized prospective study was performed on 129 bleeding peptic ulcer patients with hematemesis or melena. Sixty-two patients were treated by endoscopic hemoclipping and subsequently H(2) receptor antagonists were injected intravenously (hemoclipping group), and 67 patients were treated with an oral PPI without endoscopic treatment (PPI group). The 24-hr gastric pH test was performed sequentially following the treatment. The initial hemostasis rate of the hemoclipping group was 93.5% (58/62) and the rebleeding rate was 6.9% (4/58), and the hemostasis rate of the PPI group was 92.5% (62/67) and the rebleeding rate was 7.5% (5/67), which were not different. The 24-hr gastric pH was 4.54+/-2.56 in the hemoclipping group and 5.97+/-1.30 in the PPI group (P<0.037). In the bleeding peptic ulcer patients, the hemostasis rate with the oral administration of PPIs was not different from that with the endoscopic hemoclipping treatment.
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Affiliation(s)
- Jin Ii Kim
- Division of Gastroenterology, Department of Internal Medicine, The Catholic University of Korea, Korea
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Abstract
We describe a case of esophageal perforation that resulted from a fishbone. A 71-year-old man had had a fishbone impacted in the lower esophagus for 2 days. At presentation, the bone was dislodged at endoscopy; one round opening in a deep ulceration was detected when the fishbone was removed. The perforation was closed by endoscopic hemoclipping, after the removal of the fishbone. A thoracic computed tomography revealed air around the esophagus, aorta and bronchus and the presence of a pleural effusion. These findings suggested mediastinal emphysema and mediastinitis due to the esophageal perforation after the removal of the fishbone. Esophagography revealed a focal esophageal defect and linear contrast leakage at the distal esophagus. The mediastinal emphysema and pleural effusion successfully resolved after the endoscopic hemoclip application and conservative management of the perforation.
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Affiliation(s)
- H Y Sung
- Division of Gastroenterology, Department of Internal Medicine, Catholic University of Korea, Seoul, Korea
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Chang KH, Lee JM, Hwang-Bo J, Yoo KH, Sohn BH, Yang JM, Chung IS. Expression of recombinant cyclooxygenase 1 in Drosophila melanogaster S2 cells transformed with human beta1,4-galactosyltransferase and Galbeta1,4-GlcNAc alpha2,6-sialyltransferase. Biotechnol Lett 2007; 29:1803-9. [PMID: 17665137 DOI: 10.1007/s10529-007-9489-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2007] [Accepted: 07/12/2007] [Indexed: 10/23/2022]
Abstract
We examined the expression of human cyclooxygenase-1 (COX-1) in Drososphila melanogaster S2 (S2) cells transformed with cDNAs encoding beta1,4-galactosyltransferase (GalT) and Galbeta1,4-GlcNAc alpha2,6-sialyltransferase (ST). Southern blot analysis indicated that multiple copies of the glycosyltransferases genes were integrated into the S2 cell genome. A lectin blot analysis also indicated that recombinant COX-1 from S2COX-1/GalT-ST cells contained the glycan residues of beta1,4-linked galactose and alpha2,6-linked sialic acid. The specific peroxidase activity of recombinant sialylated COX-1 from S2COX-1/GalT-ST cells was 41,250 U mg(-1), indicating an increase of approximately 22% compared with a non-sialylated control (33,850 U mg(-1)) from S2COX-1 cells.
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Affiliation(s)
- Kyung Hwa Chang
- Graduate School of Biotechnology and Plant Metabolism Research Center, Kyung Hee University, Suwon, 446-701, Korea
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Chang JH, Kim SW, Chung WC, Kim YC, Jung CK, Paik CN, Park JM, Cho YK, Lee IS, Choi MG, Chung IS. [Clinical review of gastrointestinal carcinoid tumor and analysis of the factors predicting metastasis]. Korean J Gastroenterol 2007; 50:19-25. [PMID: 18172355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
BACKGROUND/AIMS Carcinoid tumors are submucosal tumors with metastatic potential. We tried to determine the clinical course of gastrointestinal (GI) carcinoid tumors and find the factors predicting metastasis. METHODS We reviewed the clinical records of 81 cases with GI carcinoid tumors. Involved organ, age, sex, symptoms, treatments, and metastatic patterns were reviewed. We evaluated the macroscopic and microscopic parameters to predict the metastatic potential of GI carcinoid tumors. RESULTS The common sites of GI carcinoids were rectum (71.7%), stomach (13.6%), and duodenum (8.6%). Mean age of the patients was 49 years old with a peak incidence of sixth decade. Male to female ratio was 1.38:1. Most symptoms were usually nonspecific. Fifty five patients (67.9%) received endoscopic treatments while 23 patients (28.4%) received surgical treatment. Patients were followed up for a mean period of 15.6 months. There were 10 cases (12.3%) of metastasis. There were significantly more metastasis in patients with tumor size>10 mm (p<0.001), central depression or ulcer (p=0.009) in macroscopic parameter, and with invasion below submucosa, lymphatic or venous invasion, number of mitosis>2, or Ki-67 labeling index>2 in microscopic parameter (p<0.05). Independent factors predicting metastasis were tumor size and central depression or ulcer in multivariate analysis (p=0.002 and p=0.035, respectively). CONCLUSIONS Patients with tumor size>10 mm, central depression or ulcer, invasion below submucosa, lymphatic or venous invasion, mitosis>2, and Ki-67 labeling index>2 have higher metastatic potential. Those with risk factors predicting metastasis should be treated and followed carefully.
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Affiliation(s)
- Jae Hyuck Chang
- Department of Internal Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea
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Kim KI, Sunter G, Bisaro DM, Chung IS. Improved expression of recombinant GFP using a replicating vector based on Beet curly top virus in leaf-disks and infiltrated Nicotiana benthamiana leaves. Plant Mol Biol 2007; 64:103-12. [PMID: 17294255 DOI: 10.1007/s11103-007-9137-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2006] [Accepted: 01/17/2007] [Indexed: 05/13/2023]
Abstract
Recombinant green fluorescent protein (GFP) with a molecular mass of 29 kDa was transiently expressed in Agrobacterium-inoculated leaf-disks prepared from Nicotiana benthamiana plants. Expression of GFP from the Cauliflower mosaic virus (CaMV) 35 S promoter within a replicating vector based on the geminivirus Beet curly top virus (BCTV) was more than 3 times higher than from a control, non-replicating vector. Use of the Cassava vein mosaic virus (CsVMV) promoter in the BCTV replicating vector increased the expression of recombinant GFP 320% at the transcript level, compared to use of the control CaMV 35 S promoter. Expression of recombinant GFP from Agrobacterium-inoculated leaf-disks of N. benthamiana was further enhanced up to 240% in the presence of post-transcriptional gene silencing suppressor p19.
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Affiliation(s)
- Kyung Il Kim
- Graduate School of Biotechnology and Plant Metabolism Research Center, Kyung Hee University, Suwon 449-701, Korea
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