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Min KY, Kim DK, Jo MG, Choi MY, Lee D, Park JW, Park YJ, Chung Y, Kim YM, Park YM, Kim HS, Choi WS. IL-27-induced PD-L1 highSca-1 + innate lymphoid cells suppress contact hypersensitivity in an IL-10-dependent manner. Exp Mol Med 2024; 56:616-629. [PMID: 38424193 PMCID: PMC10984996 DOI: 10.1038/s12276-024-01187-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 11/20/2023] [Accepted: 12/26/2023] [Indexed: 03/02/2024] Open
Abstract
Innate lymphoid cells (ILCs) play an important role in maintaining tissue homeostasis and various inflammatory responses. ILCs are typically classified into three subsets, as is the case for T-cells. Recent studies have reported that IL-10-producing type 2 ILCs (ILC210s) have an immunoregulatory function dependent on IL-10. However, the surface markers of ILC210s and the role of ILC210s in contact hypersensitivity (CHS) are largely unknown. Our study revealed that splenic ILC210s are extensively included in PD-L1highSca-1+ ILCs and that IL-27 amplifies the development of PD-L1highSca-1+ ILCs and ILC210s. Adoptive transfer of PD-L1highSca-1+ ILCs suppressed oxazolone-induced CHS in an IL-10-dependent manner Taken together, our results demonstrate that ILC210s are critical for the control of CHS and suggest that ILC210s can be used as target cells for the treatment of CHS.
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Affiliation(s)
- Keun Young Min
- Department of Immunology, School of Medicine, Konkuk University, Chungju, 27478, Republic of Korea
| | - Do-Kyun Kim
- Korea Zoonosis Research Institute, Jeonbuk National University, Iksan, 54531, Republic of Korea
| | - Min Geun Jo
- Department of Immunology, School of Medicine, Konkuk University, Chungju, 27478, Republic of Korea
| | - Min Yeong Choi
- Department of Immunology, School of Medicine, Konkuk University, Chungju, 27478, Republic of Korea
| | - Dajeong Lee
- Department of Immunology, School of Medicine, Konkuk University, Chungju, 27478, Republic of Korea
| | - Jeong Won Park
- Department of Biomedical Sciences, College of Natural Science and Department of Health Sciences, The Graduate School of Dong-A University, Busan, 49315, Republic of Korea
| | - Young-Jun Park
- College of Pharmacy, Jeju National University, Jeju, 63243, Republic of Korea
| | - Yeonseok Chung
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea
| | - Young Mi Kim
- Department of Preventive Pharmacy, College of Pharmacy, Duksung Women's University, Seoul, 01369, Republic of Korea
| | - Yeong-Min Park
- Department of Immunology, School of Medicine, Konkuk University, Chungju, 27478, Republic of Korea
| | - Hyuk Soon Kim
- Department of Biomedical Sciences, College of Natural Science and Department of Health Sciences, The Graduate School of Dong-A University, Busan, 49315, Republic of Korea.
| | - Wahn Soo Choi
- Department of Immunology, School of Medicine, Konkuk University, Chungju, 27478, Republic of Korea.
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Hyun SY, Kim EY, Kang M, Park JW, Hong KS, Chung HM, Choi WS, Park SP, Noh G, Kim HS. Embryonic-stem-cell-derived mesenchymal stem cells relieve experimental contact urticaria by regulating the functions of mast cells and T cells. Sci Rep 2023; 13:22694. [PMID: 38123643 PMCID: PMC10733409 DOI: 10.1038/s41598-023-50258-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 12/18/2023] [Indexed: 12/23/2023] Open
Abstract
Contact urticaria (CU) is an inflammatory skin disorder triggered by specific substances upon skin contact, leading to immediate acute or chronic manifestations characterized by swelling and redness. While mesenchymal stem cells (MSCs) are increasingly recognized for their therapeutic potential in immune diseases, research on the efficacy and mechanisms of stem cell therapy for urticaria remains scarce. This study investigates the regulatory role of embryonic-stem-cell-derived multipotent MSCs (M-MSCs) administered in a CU mouse model. Therapeutic effects of M-MSC administration were assessed in a Trimellitic anhydride-induced contact urticaria model, revealing significant inhibition of urticarial reactions, including ear swelling, itchiness, and skin lesion. Moreover, M-MSC administration exerted control over effector T cell activities in major lymphoid and peripheral tissues, while also suppressing mast cell degranulation in peripheral tissues. Notably, the inhibitory effects mediated by M-MSCs were found to be TGF-β-dependent. Our study demonstrates the capacity of M-MSCs to regulate contact urticaria in a murine model, harmonizing the activation of inflammatory T cells and mast cells. Additionally, we suggest that TGF-β derived from M-MSCs could play a pivotal role as an inhibitory mechanism in contact urticaria.
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Affiliation(s)
- Seung Yeun Hyun
- Department of Biomedical Sciences, College of Natural Science and Department of Health Sciences, The Graduate School of Dong-A University, Busan, 49315, Korea
| | | | - Minseong Kang
- Department of Biomedical Sciences, College of Natural Science and Department of Health Sciences, The Graduate School of Dong-A University, Busan, 49315, Korea
| | - Jeong Won Park
- Department of Biomedical Sciences, College of Natural Science and Department of Health Sciences, The Graduate School of Dong-A University, Busan, 49315, Korea
| | | | - Hyung-Min Chung
- Mirae Cell Bio Co., Ltd., Seoul, 04795, Korea
- School of Medicine, Konkuk University, Seoul, 05029, Korea
| | - Wahn Soo Choi
- School of Medicine, Konkuk University, Seoul, 05029, Korea
| | - Se-Pill Park
- Mirae Cell Bio Co., Ltd., Seoul, 04795, Korea.
- Department of Bio Medical Informatics, College of Applied Life Sciences, Jeju National University, Jeju, 63243, Korea.
| | - Geunwoong Noh
- Department of Allergy, Allergy and Clinical Immunology Center, Cheju Halla General Hospital, Jeju, 63127, Korea.
| | - Hyuk Soon Kim
- Department of Biomedical Sciences, College of Natural Science and Department of Health Sciences, The Graduate School of Dong-A University, Busan, 49315, Korea.
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Lee S, Kim MJ, Ahn SI, Choi SK, Min KY, Choi WS, You JS. Epigenetic landscape analysis reveals the significance of early reduced chromatin accessibility in osteoclastogenesis. Bone 2023; 177:116918. [PMID: 37739296 DOI: 10.1016/j.bone.2023.116918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 09/15/2023] [Accepted: 09/18/2023] [Indexed: 09/24/2023]
Abstract
Recently improved techniques could provide snapshots of chromatin structure generated based on chromatin accessibility. Since chromatin accessibility determines transcriptional potential, it has been attempted in a variety of cell systems. However, there has been no genome-wide analysis of chromatin accessibility for the entire murine osteoclast (OC) differentiation process. We performed an Assay for Transposase-Accessible Chromatin (ATAC)-sequencing (seq) during RANKL-induced OC differentiation and found that global chromatin accessibility decreased, especially early in OC differentiation. The global histone H3K27Ac level, an active histone modification mark, was diminished during OC differentiation by western blot and histone extract experiments. Its genomic enrichment was also reduced based on publicly available H3K27Ac chromatin immunoprecipitation (ChIP)-seq data. ATAC-seq and H3K27Ac ChIP-seq data demonstrated that RANKL induced a less accessible chromatin state during OC differentiation. Restoration of reduced H3K27Ac, presumably representing accessible states upon acetate treatment, suppresses OC differentiation by provoking immune-related gene expression. Subsequential integrative analysis of ATAC-seq, RNA-seq after acetate treatment, and H3K27Ac ChIP-seq reveals that Irf8 and its downstream targets are the most vulnerable to chromatin accessibility changes and acetate supplementation. Taken together, our study generated chromatin accessibility maps during the whole OC differentiation and suggested perturbation of chromatin accessibility might be a potential therapeutic strategy for excessive OC diseases.
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Affiliation(s)
- Sangyong Lee
- School of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Myoung Jun Kim
- School of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Seor I Ahn
- School of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Sung Kyung Choi
- School of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Keun Young Min
- School of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Wahn Soo Choi
- School of Medicine, Konkuk University, Chungju 27478, Republic of Korea; KU Open Innovation Center, Research Institute of Medical Science, Konkuk University, Republic of Korea
| | - Jueng Soo You
- School of Medicine, Konkuk University, Chungju 27478, Republic of Korea; KU Open Innovation Center, Research Institute of Medical Science, Konkuk University, Republic of Korea.
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Lee JE, Choi MY, Min KY, Jo MG, Kim YM, Kim HS, Choi WS. Drug repositioning of anti-microbial agent nifuratel to treat mast cell-mediated allergic responses. Int J Immunopathol Pharmacol 2023; 37:3946320231202349. [PMID: 37706235 PMCID: PMC10503296 DOI: 10.1177/03946320231202349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 09/01/2023] [Indexed: 09/15/2023] Open
Abstract
Objectives: Our objective was to assess the effects and mechanisms of nifuratel on IgE-mediated mast cell (MC) degranulation and anaphylaxis in both in vitro and in vivo settings.Methods: The anti-allergic activity of nifuratel was evaluated in mast cell cultures and the passive cutaneous anaphylaxis (PCA) model. The effects of nifuratel on signaling pathways stimulated by antigen in mast cells were measured by immunoblotting, immunoprecipitation, in vitro protein tyrosine kinase assay, and other molecular biological methods.Results: Nifuratel reversibly inhibited antigen-induced degranulation of MCs (IC50, approximately 0.34 μM for RBL-2H3 cells; approximately 0.94 μM for BMMCs) and suppressed the secretion of inflammatory cytokines IL-4 (IC50, approximately 0.74 μM) and TNF-α (IC50, approximately 0.48 μM). Mechanism studies showed that nifuratel inhibited the phosphorylation of Syk by antigen via the inhibition of recruitment of cytosolic Syk to the ɣ subunit of FcεRI, and decreased the activation of Syk downstream signaling proteins LAT, Akt, and MAPKs. Finally, nifuratel dose-dependently suppressed the IgE-mediated passive cutaneous anaphylaxis in mice (ED50, approximately 22 mg/kg).Conclusion: Our findings suggest that nifuratel inhibits pathways essential for the activation of mast cells to suppress anaphylaxis, thereby indicating that the anti-microbial drug, nifuratel, could be a potential drug candidate for IgE-mediated allergic disorders.
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Affiliation(s)
- Ji Eon Lee
- Department of Immunology, College of Medicine, Konkuk University, Chungju, Republic of Korea
| | - Min Yeong Choi
- Department of Immunology, College of Medicine, Konkuk University, Chungju, Republic of Korea
| | - Keun Young Min
- Department of Immunology, College of Medicine, Konkuk University, Chungju, Republic of Korea
| | - Min Geun Jo
- Department of Immunology, College of Medicine, Konkuk University, Chungju, Republic of Korea
| | - Young Mi Kim
- College of Pharmacy, Duksung Women’s University, Seoul, Republic of Korea
| | - Hyuk Soon Kim
- Department of Biomedical Sciences, College of Natural Science and Department of Health Sciences, The Graduate School of Dong-A University, Busan, Republic of Korea
| | - Wahn Soo Choi
- Department of Immunology, College of Medicine, Konkuk University, Chungju, Republic of Korea
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Min KY, Koo J, Noh G, Lee D, Jo MG, Lee JE, Kang M, Hyun SY, Choi WS, Kim HS. CD1d hiPD-L1 hiCD27 + Regulatory Natural Killer Subset Suppresses Atopic Dermatitis. Front Immunol 2022; 12:752888. [PMID: 35069528 PMCID: PMC8766675 DOI: 10.3389/fimmu.2021.752888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 08/03/2021] [Accepted: 12/09/2021] [Indexed: 11/17/2022] Open
Abstract
Effector and regulatory functions of various leukocytes in allergic diseases have been well reported. Although the role of conventional natural killer (NK) cells has been established, information on its regulatory phenotype and function are very limited. Therefore, the objective of this study was to investigate the phenotype and inhibitory functions of transforming growth factor (TGF)-β-producing regulatory NK (NKreg) subset in mice with MC903-induced atopic dermatitis (AD). Interestingly, the population of TGF-β-producing NK cells in peripheral blood monocytes (PBMCs) was decreased in AD patients than in healthy subjects. The number of TGF-β+ NK subsets was decreased in the spleen or cervical lymph node (cLN), but increased in ear tissues of mice with AD induced by MC903 than those of normal mice. We further observed that TGF-β+ NK subsets were largely included in CD1dhiPD-L1hiCD27+ NK cell subset. We also found that numbers of ILC2s and TH2 cells were significantly decreased by adoptive transfer of CD1dhiPD-L1hiCD27+ NK subsets. Notably, the ratio of splenic Treg per TH2 was increased by the adoptive transfer of CD1dhiPD-L1hiCD27+ NK cells in mice. Taken together, our findings demonstrate that the TGF-β-producing CD1dhiPD-L1hiCD27+ NK subset has a previously unrecognized role in suppressing TH2 immunity and ILC2 activation in AD mice, suggesting that the function of TGF-β-producing NK subset is closely associated with the severity of AD in humans.
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Affiliation(s)
- Keun Young Min
- Department of Immunology, School of Medicine, Konkuk University, Chungju, South Korea
| | - Jimo Koo
- Department of Immunology, School of Medicine, Konkuk University, Chungju, South Korea
| | - Geunwoong Noh
- Department of Allergy, Allergy and Clinical Immunology Center Cheju Halla General Hospital, Jeju, South Korea
| | - Dajeong Lee
- Department of Immunology, School of Medicine, Konkuk University, Chungju, South Korea
| | - Min Geun Jo
- Department of Immunology, School of Medicine, Konkuk University, Chungju, South Korea
| | - Ji Eon Lee
- Department of Immunology, School of Medicine, Konkuk University, Chungju, South Korea
| | - Minseong Kang
- Department of Health Sciences, The Graduate School of Dong-A University, Busan, South Korea
| | - Seung Yeun Hyun
- Department of Health Sciences, The Graduate School of Dong-A University, Busan, South Korea
| | - Wahn Soo Choi
- Department of Immunology, School of Medicine, Konkuk University, Chungju, South Korea
| | - Hyuk Soon Kim
- Department of Health Sciences, The Graduate School of Dong-A University, Busan, South Korea.,Department of Biomedical Sciences, College of Natural Science, Dong-A University, Busan, South Korea
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6
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Wang R, Choi WS. Wafer as an adjunct to plating patient-specific implants for the multi-segment maxilla: a useful tool. Int J Oral Maxillofac Surg 2022; 51:1055-1058. [PMID: 35148911 DOI: 10.1016/j.ijom.2022.01.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 10/25/2021] [Accepted: 01/25/2022] [Indexed: 11/19/2022]
Abstract
Virtual surgical planning for orthognathic surgery using patient-specific implants (PSI) is usually waferless nowadays. However, without an occlusal wafer, difficulties arise in controlling the accuracy of multi-segment maxillary osteotomies, especially for expansion and rotational movements of each segment. It is technically challenging intraoperatively to manipulate multiple segments to fit into the PSI, as the relatively small bone segments need to be secured into the PSI while simultaneously achieving individual segment movements in all planes and with potential bony interferences with each other. Therefore, the use of a maxillary tooth-supported surgical guide is proposed and described. When the guide is inserted before the PSI, it overcomes difficulties in handling multiple maxillary segments and facilitates achieving maximal positional precision of each individual bone segment. The guide enables multiple smaller segments to behave as one unit with the designated occlusion whilst visualizing bony interferences before PSI plating is commenced. Adding a tooth-borne surgical guide in the form of a wafer and a customized arch bar is a cost-effective method to enhance accuracy in virtually planned multi-segment maxillary surgery. Further investigations are required to validate the accuracy and advantages of using wafers and PSI in multi-segment maxillary and mandibular orthognathic surgeries.
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Affiliation(s)
- R Wang
- Division of Oral and Maxillofacial Surgery, Faculty of Dentistry, University of Hong Kong, Hong Kong Special Administrative Region
| | - W S Choi
- Division of Oral and Maxillofacial Surgery, Faculty of Dentistry, University of Hong Kong, Hong Kong Special Administrative Region.
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7
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Min KY, Lee MB, Hong SH, Lee D, Jo MG, Lee JE, Choi MY, You JS, Kim YM, Park YM, Kim HS, Choi WS. Entinostat, a histone deacetylase inhibitor, increases the population of IL-10+ regulatory B cells to suppress contact hypersensitivity. BMB Rep 2021. [PMID: 34488930 PMCID: PMC8560462 DOI: 10.5483/bmbrep.2021.54.10.092] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
IL-10+ regulatory B (Breg) cells play a vital role in regulating the immune responses in experimental autoimmune encephalomyelitis, colitis, and contact hypersensitivity (CHS). Several sti-mulants such as lipopolysaccharide (LPS), CD40 ligand, and IL-21 spur the activation and maturation of IL-10+ Breg cells, while the epigenetic mechanism for the IL-10 expression remains largely unknown. It is well accepted that the histone acetylation/deacetylation is an important mechanism that regulates the expression of IL-10. We found that entinostat, an HDAC inhibitor, stimulated the induction of IL-10+ Breg cells by LPS in vitro and the formation of IL-10+ Breg cells to suppress CHS in vivo. We further demonstrated that entinostat inhibited HDAC1 from binding to the proximal region of the IL-10 expression promoter in splenic B cells, followed by an increase in the binding of NF-κB p65, eventually enhancing the expression of IL-10 in Breg cells.
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Affiliation(s)
- Keun Young Min
- Department of Immunology, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Min Bum Lee
- Department of Immunology, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Seong Hwi Hong
- Department of Biochemistry, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Dajeong Lee
- Department of Immunology, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Min Geun Jo
- Department of Immunology, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Ji Eon Lee
- Department of Immunology, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Min Yeong Choi
- Department of Immunology, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Jueng Soo You
- Department of Biochemistry, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Young Mi Kim
- Department of Preventive Pharmacy, College of Pharmacy, Duksung Women's University, Seoul 01369, Korea
| | - Yeong Min Park
- Department of Immunology, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Hyuk Soon Kim
- Department of Biomedical Sciences, College of Natural Science and Department of Health Sciences, Dong-A University, Busan 49315, Korea
| | - Wahn Soo Choi
- Department of Immunology, School of Medicine, Konkuk University, Chungju 27478, Korea
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8
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Kim MJ, Kim HS, Lee S, Min KY, Choi WS, You JS. Hexosamine Biosynthetic Pathway-Derived O-GlcNAcylation Is Critical for RANKL-Mediated Osteoclast Differentiation. Int J Mol Sci 2021; 22:ijms22168888. [PMID: 34445596 PMCID: PMC8396330 DOI: 10.3390/ijms22168888] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 08/12/2021] [Accepted: 08/15/2021] [Indexed: 12/23/2022] Open
Abstract
O-linked-N-acetylglucosaminylation (O-GlcNAcylation) performed by O-GlcNAc transferase (OGT) is a nutrient-responsive post-translational modification (PTM) via the hexosamine biosynthetic pathway (HBP). Various transcription factors (TFs) are O-GlcNAcylated, affecting their activities and significantly contributing to cellular processes ranging from survival to cellular differentiation. Given the pleiotropic functions of O-GlcNAc modification, it has been studied in various fields; however, the role of O-GlcNAcylation during osteoclast differentiation remains to be explored. Kinetic transcriptome analysis during receptor activator of nuclear factor-kappaB (NF-κB) ligand (RANKL)-mediated osteoclast differentiation revealed that the nexus of major nutrient metabolism, HBP was critical for this process. We observed that the critical genes related to HBP activation, including Nagk, Gfpt1, and Ogt, were upregulated, while the global O-GlcNAcylation was increased concomitantly during osteoclast differentiation. The O-GlcNAcylation inhibition by the small-molecule inhibitor OSMI-1 reduced osteoclast differentiation in vitro and in vivo by disrupting the translocation of NF-κB p65 and nuclear factor of activated T cells c1 (NFATc1) into the nucleus by controlling their PTM O-GlcNAcylation. Furthermore, OSMI-1 had a synergistic effect with bone target therapy on osteoclastogenesis. Lastly, knocking down Ogt with shRNA (shOgt) mimicked OSMI-1’s effect on osteoclastogenesis. Targeting O-GlcNAcylation during osteoclast differentiation may be a valuable therapeutic approach for osteoclast-activated bone diseases.
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Affiliation(s)
- Myoung Jun Kim
- School of Medicine, Konkuk University, Seoul 05029, Korea; (M.J.K.); (S.L.); (K.Y.M.); (W.S.C.)
| | - Hyuk Soon Kim
- Department of Biomedical Sciences, College of Natural Science, Dong-A University, Busan 49315, Korea;
- Department of Health Sciences, The Graduate School of Dong-A University, Busan 49315, Korea
| | - Sangyong Lee
- School of Medicine, Konkuk University, Seoul 05029, Korea; (M.J.K.); (S.L.); (K.Y.M.); (W.S.C.)
| | - Keun Young Min
- School of Medicine, Konkuk University, Seoul 05029, Korea; (M.J.K.); (S.L.); (K.Y.M.); (W.S.C.)
| | - Wahn Soo Choi
- School of Medicine, Konkuk University, Seoul 05029, Korea; (M.J.K.); (S.L.); (K.Y.M.); (W.S.C.)
- KU Open Innovation Center, Research Institute of Medical Science, Konkuk University, Chungju 27478, Korea
| | - Jueng Soo You
- School of Medicine, Konkuk University, Seoul 05029, Korea; (M.J.K.); (S.L.); (K.Y.M.); (W.S.C.)
- KU Open Innovation Center, Research Institute of Medical Science, Konkuk University, Chungju 27478, Korea
- Correspondence: ; Tel.: +82-2-2049-6235
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9
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Yang WF, Choi WS, Zhu WY, Zhang CY, Li DTS, Tsoi JKH, Tang AWL, Kwok KW, Su YX. Spatial deviations of the temporomandibular joint after oncological mandibular reconstruction. Int J Oral Maxillofac Surg 2021; 51:44-53. [PMID: 33865661 DOI: 10.1016/j.ijom.2021.02.033] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 01/01/2021] [Accepted: 02/17/2021] [Indexed: 12/15/2022]
Abstract
Spatial deviations of the temporomandibular joint (TMJ) after oncological mandibular reconstruction are important to the aesthetic and functional rehabilitation. The aim of this study was to clarify whether and how three dimensionally (3D) printed patient-specific surgical plates, and the preservation of the condyle or ramus, affect spatial deviations of the TMJ. A total of 33 patients who underwent mandibular reconstruction via computer-assisted surgery were included. Regarding absolute deviations, patients in the 3D-printed plate group showed smaller TMJ deviations compared to those in the conventional plate group. There was no difference in absolute deviations of the TMJ regardless of whether the condyle or ramus was preserved. Regarding physiological deviations, the impact on the contralateral TMJ was smaller in the 3D-printed plate group. Patients with both the condyle and ramus removed had significantly higher deviations of the condyle and joint space. In summary, 3D-printed patient-specific surgical plates improved the spatial accuracy of the TMJ. Under physiological conditions, TMJ deviations on the operated side were mainly affected by the preservation of the condyle. Removal of both the condyle and ramus caused more severe spatial interference to the TMJ; this should be further confirmed.
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Affiliation(s)
- W-F Yang
- Division of Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - W S Choi
- Division of Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - W-Y Zhu
- Division of Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - C-Y Zhang
- Guangzhou Janus Biotechnology Co., Ltd, Guangzhou, China
| | - D T S Li
- Division of Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - J K-H Tsoi
- Dental Materials Science, Division of Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - A W-L Tang
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR, China
| | - K-W Kwok
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR, China
| | - Y-X Su
- Division of Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China.
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10
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Lee S, Kim HS, Kim MJ, Min KY, Choi WS, You JS. Glutamine metabolite α-ketoglutarate acts as an epigenetic co-factor to interfere with osteoclast differentiation. Bone 2021; 145:115836. [PMID: 33383217 DOI: 10.1016/j.bone.2020.115836] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 12/19/2020] [Accepted: 12/22/2020] [Indexed: 01/23/2023]
Abstract
Osteoclasts (OCs) have been well-known involved in the exacerbation of bone-related diseases. However, the role of metabolites on osteoclastogenesis has not been well characterized. Herein, we found osteoclastogenesis was negatively regulated by α-ketoglutarate (αKG) in vitro and in vivo (C57BL/6 mouse). Kinetic transcriptome analysis revealed the upregulation of solute carrier family 7 member 11 (Slc7a11), a subunit of the cysteine/glutamate antiporter, as well as the downregulation of typical OC maker genes through αKG treatment. Given that Slc7a11 could control ROS level through glutathione import, we measured intracellular ROS, then RANKL-induced ROS production was inhibited by αKG. Notably, we highlight that αKG plays an epigenetic co-factor at the Slc7a11 promoter by demethylating repressive histone H3K9 methylation and simultaneously increasing the nuclear factor erythroid 2-related factor (Nrf2) binding, a critical transcription factor through chromatin immunoprecipitation (ChIP) analysis. Together, we suggested that αKG could be a therapeutic strategy for OC activated diseases.
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Affiliation(s)
- Sangyong Lee
- School of Medicine, Konkuk University, Seoul, South Korea
| | - Hyuk Soon Kim
- Department of Biomedical Sciences, College of Natural Science, Dong-A University, Busan, South Korea; Department of Health Sciences, The Graduate School of Dong-A University, Busan, South Korea
| | - Myoung Jun Kim
- School of Medicine, Konkuk University, Seoul, South Korea
| | - Keun Young Min
- School of Medicine, Konkuk University, Seoul, South Korea
| | - Wahn Soo Choi
- School of Medicine, Konkuk University, Seoul, South Korea; Research Institute of Medical Science, KU Open Innovation Center, Konkuk University, Seoul, South Korea
| | - Jueng Soo You
- School of Medicine, Konkuk University, Seoul, South Korea; Research Institute of Medical Science, KU Open Innovation Center, Konkuk University, Seoul, South Korea.
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11
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Leung YY, Wang R, Wong NSM, Li DTS, Au SW, Choi WS, Su YX. Surgical morbidities of sagittal split ramus osteotomy versus intraoral vertical ramus osteotomy for the correction of mandibular prognathism: a randomized clinical trial. Int J Oral Maxillofac Surg 2020; 50:933-939. [PMID: 33168369 DOI: 10.1016/j.ijom.2020.06.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 02/22/2020] [Revised: 04/14/2020] [Accepted: 06/23/2020] [Indexed: 11/30/2022]
Abstract
The sagittal split ramus osteotomy (SSRO) and intraoral vertical ramus osteotomy (IVRO) are two common orthognathic procedures for the treatment of mandibular prognathism. This randomized clinical trial compared the surgical morbidities between SSRO and IVRO for patients with mandibular prognathism over the first 2 years postoperative. Ninety-eight patients (40 male, 58 female) with a mean age of 24.4±3.5 years underwent bilateral SSRO (98 sides) or IVRO (98 sides) as part or all of their orthognathic surgery. IVRO presented less short-term and long-term surgical morbidity in general. The SSRO group had a greater incidence of inferior alveolar nerve deficit at all follow-up time points (P< 0.01). There was more TMJ pain at 6 weeks (P= 0.047) and 3 months (P= 0.001) postoperative in the SSRO group. The SSRO group also presented more minor complications, which were related to titanium plate exposure and infection. There were no major complications for either technique in this study. Despite the need for intermaxillary fixation, IVRO appears to be associated with less surgical morbidity than SSRO when performed as a mandibular setback procedure to treat mandibular prognathism.
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Affiliation(s)
- Y Y Leung
- Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong.
| | - R Wang
- Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong
| | - N S M Wong
- Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong
| | - D T S Li
- Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong
| | - S W Au
- Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong
| | - W S Choi
- Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong
| | - Y-X Su
- Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong
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12
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Lee D, Park YH, Lee JE, Kim HS, Min KY, Jo MG, Kim HS, Choi WS, Kim YM. Dasatinib Inhibits Lyn and Fyn Src-Family Kinases in Mast Cells to Suppress Type I Hypersensitivity in Mice. Biomol Ther (Seoul) 2020; 28:456-464. [PMID: 32268657 PMCID: PMC7457176 DOI: 10.4062/biomolther.2020.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 01/30/2020] [Revised: 03/12/2020] [Accepted: 03/13/2020] [Indexed: 12/21/2022] Open
Abstract
Mast cells (MCs) are systemically distributed and secrete several allergic mediators such as histamine and leukotrienes to cause type I hypersensitivity. Dasatinib is a type of anti-cancer agent and it has also been reported to inhibit human basophils. However, dasatinib has not been reported for its inhibitory effects on MCs or type I hypersensitivity in mice. In this study, we examined the inhibitory effect of dasatinib on MCs and MC-mediated allergic response in vitro and in vivo. in vitro, dasatinib inhibited the degranulation of MCs by antigen stimulation in a dose-dependent manner (IC50, ~34 nM for RBL-2H3 cells; ~52 nM for BMMCs) without any cytotoxicity. It also suppressed the secretion of inflammatory cytokines IL-4 and TNF-α by antigen stimulation. Furthermore, dasatinib inhibited MC-mediated passive cutaneous anaphylaxis (PCA) in mice (ED50, ~29 mg/kg). Notably, dasatinib significantly suppressed the degranulation of MCs in the ear tissue. As the mechanism of its effect, dasatinib inhibited the activation of Syk and Syk-mediated downstream signaling proteins, LAT, PLCγ1, and three typical MAP kinases (Erk1/2, JNK, and p38), which are essential for the activation of MCs. Interestingly, in vitro tyrosine kinase assay, dasatinib directly inhibited the activities of Lyn and Fyn, the upstream tyrosine kinases of Syk in MCs. Taken together, dasatinib suppresses MCs and PCA in vitro and in vivo through the inhibition of Lyn and Fyn Src-family kinases. Therefore, we suggest the possibility of repositioning the anti-cancer drug dasatinib as a treatment for various MC-mediated type I hypersensitive diseases.
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Affiliation(s)
- Dajeong Lee
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Young Hwan Park
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Ji Eon Lee
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea.,College of Pharmacy, Duksung Women's University, Seoul 01369, Republic of Korea
| | - Hyuk Soon Kim
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Keun Young Min
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Min Geun Jo
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Hyung Sik Kim
- Division of Toxicology, College of Pharmacy, Sungkyunkwan University, Suwon 6419, Republic of Korea
| | - Wahn Soo Choi
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Young Mi Kim
- College of Pharmacy, Duksung Women's University, Seoul 01369, Republic of Korea
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13
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Lee JH, Yoon CJ, Choi WS, Lee CH. Benign postoperative hepaticojejunostomy stricture: percutaneous recanalisation using the reverse end of a microwire. Clin Radiol 2020; 75:879.e1-879.e6. [PMID: 32727657 DOI: 10.1016/j.crad.2020.06.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 06/23/2020] [Indexed: 11/26/2022]
Abstract
AIM To evaluate the technical feasibility and safety of percutaneous recanalisation of benign postoperative hepaticojejunostomy strictures using the reverse end of a microwire. MATERIALS AND METHODS Twenty-one patients with benign postoperative hepaticojejunostomy strictures that had failed to recanalise following management with conventional percutaneous techniques from January 2012 to March 2019 were included in the study. The stricture was punctured by the reverse end of a microwire. Subsequently, serial balloon dilatation and covered stent placement was performed. Technical as well as clinical success, complications, and patency of the hepaticojejunostomy were evaluated. RESULTS Technical success was achieved in 19 of 21 (90.5%) patients. The mean number of treatment sessions was 1.2 (range, 1-2). The obstructive symptoms were resolved within 3 days after the procedure in 19 patients (100%). There were no major complications. The 1-year and 3-year patency rates were 76.9% and 61.5%, respectively. CONCLUSION Percutaneous recanalisation using the reverse end of a microwire is technically feasible and safe in the treatment of benign postoperative hepaticojejunostomy strictures. This technique is useful when the conventional percutaneous technique cannot be used to cross the stricture.
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Affiliation(s)
- J H Lee
- Department of Radiology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, 82, Gumi-ro 173beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do 13620, South Korea
| | - C J Yoon
- Department of Radiology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, 82, Gumi-ro 173beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do 13620, South Korea.
| | - W S Choi
- Department of Radiology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, 82, Gumi-ro 173beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do 13620, South Korea
| | - C-H Lee
- Department of Radiology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, 82, Gumi-ro 173beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do 13620, South Korea
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14
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Jung SH, Lee D, Jin H, Lee HM, Ko HM, Lee KJ, Kim SJ, Ryu Y, Choi WS, Kim B, Won KJ. Fetuin-B regulates vascular plaque rupture via TGF-β receptor-mediated Smad pathway in vascular smooth muscle cells. Pflugers Arch 2020; 472:571-581. [PMID: 32382986 DOI: 10.1007/s00424-020-02385-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 02/08/2020] [Revised: 04/23/2020] [Accepted: 04/24/2020] [Indexed: 11/28/2022]
Abstract
Fetuin-B is a serum protein linked to the regulation of physiological or pathophysiological events such as fertility, energy metabolism, and liver disease. Recently, fetuin-B has been reported to be involved in the modulation of the rupture of atherosclerotic plaques associated with acute myocardial infarction. However, the exact mechanism involved in the modulation of atherosclerotic plaque rupture event by fetuin-B is not fully elucidated yet. In the present study, we investigated whether fetuin-B could influence atherosclerotic plaque rupture through vascular smooth muscle cells (VSMCs). Immunoprecipitation assay using membrane proteins from VSMCs revealed that fetuin-B tightly bound to transforming growth factor-β receptor (TGF-βR). Fetuin-B treatment elevated TGF-βR signals (e.g., phosphorylation of Smad2 and Smad3) in VSMCs. Fetuin-B also stimulated nuclear translocation of phosphorylated Smads. Phosphorylation of Smad and its nuclear translocation by treatment with fetuin-B were inhibited in VSMCs by treatment with SB431542, a selective inhibitor of TGF-βR. Fetuin-B enhanced expression levels of plasminogen activator inhibitor-1 (PAI-1) and matrix metalloproteinase-2 (MMP-2) in VSMCs through its epigenetic modification including recruitments of both histone deacetylase 1 and RNA polymerase II. These epigenetic alterations in VSMCs were also inhibited by treatment with SB431542. In vivo administration of fetuin-B protein increased expression levels of PAI-1 and MMP-2 in the vascular plaque. However, these increases in expression were inhibited by the administration of SB43154. These results indicate that fetuin-B may modulate vascular plaque rupture by promoting expression of PAI-1 and MMP-2 in VSMCs via TGF-βR-mediated Smad pathway.
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Affiliation(s)
- Seung Hyo Jung
- Department of Physiology, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, South Korea
| | - Donghyen Lee
- Department of Physiology, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, South Korea
| | - Hengzhe Jin
- Department of Physiology, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, South Korea
| | - Hwan Myung Lee
- Department of Cosmetic Science, College of Life and Health Science, Hoseo University, Asan, 31499, South Korea
| | - Hyun Myung Ko
- Department of Life Sciences, College of Science and Technology, Woosuk University, Jincheon, 27841, South Korea
| | - Kyung-Jin Lee
- Department of Physiology, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, South Korea
| | - Su Jung Kim
- Department of Physiology, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, South Korea
| | - Yunkyoung Ryu
- Department of Physiology, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, South Korea
| | - Wahn Soo Choi
- Department of Physiology, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, South Korea
| | - Bokyung Kim
- Department of Physiology, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, South Korea
| | - Kyung-Jong Won
- Department of Physiology, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, South Korea.
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15
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Seok H, Song J, Jeon JH, Choi HK, Choi WS, Moon S, Park DW. Timing of antibiotics in septic patients: a prospective cohort study. Clin Microbiol Infect 2020; 26:1495-1500. [PMID: 32062049 DOI: 10.1016/j.cmi.2020.01.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [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: 11/14/2019] [Revised: 01/30/2020] [Accepted: 01/31/2020] [Indexed: 12/24/2022]
Abstract
OBJECTIVES To evaluate the effect of timing and appropriateness of antibiotics administration on mortality in patients diagnosed with sepsis according to the Sepsis-3 definition. METHODS This prospective cohort study was conducted in patients diagnosed with sepsis according to the Sepsis-3 definition at the emergency department of Korea University Ansan Hospital from January 2016 to January 2019. The time to antibiotics was defined as the time in hours from emergency department arrival to the first antibiotic administration. Cox proportional hazards regression analysis was used to estimate the association between time to antibiotics and 7-, 14- and 28-day mortality. RESULTS Of 482 patients enrolled onto this study, 203 (42.1%) of 482 and 312 (64.7%) of 482 were diagnosed with septic shock and high-grade infection respectively. The median time to receipt of antibiotic therapy was 115 minutes. Antibiotics were administered within 3 and 6 hours in 340 (70.4%) of 482 and 450 (93.2%) of 482 patients respectively. Initial appropriate empirical antibiotics were administered in 375 (77.8%) of 482 patients. The time to and appropriateness of the initial antibiotics were not associated with 7-, 14- and 28-day mortality in multivariate analysis. The Sequential Organ Failure Assessment (SOFA) score (adjusted hazard ratio (aHR) 1.229, 95% confidence interval (CI) 1.093-1.381, p 0.001) and initial lactate levels (aHR 1.128, 95% CI 1.034-1.230, p 0.007), Charlson comorbidity index (aHR 1.115, 95% CI 1.027-1.210, p 0.014), 2-hour lactate level (aHR 1.115, 95% CI 1.027-1.210, p 0.009) and SOFA score (aHR 1.077, 95% CI 1.013-1.144, p 0.018) affected 7-, 14- and 28-day mortality respectively. Subgroup analysis with septic shock, bacteraemia and high-grade infection did not affect mortality rates. CONCLUSIONS Time to receipt of antibiotics may not affect the prognosis of patients with sepsis if a rapid and well-trained resuscitation is combined with appropriate antibiotic administration within a reasonable time.
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Affiliation(s)
- H Seok
- Division of Infectious Diseases, Department of Medicine, Republic of Korea
| | - J Song
- Department of Emergency Medicine, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Republic of Korea
| | - J H Jeon
- Division of Infectious Diseases, Department of Medicine, Republic of Korea
| | - H K Choi
- Division of Infectious Diseases, Department of Medicine, Republic of Korea
| | - W S Choi
- Division of Infectious Diseases, Department of Medicine, Republic of Korea
| | - S Moon
- Department of Emergency Medicine, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Republic of Korea
| | - D W Park
- Division of Infectious Diseases, Department of Medicine, Republic of Korea.
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16
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Park YH, Kim DK, Kim HS, Lee D, Lee MB, Min KY, Jo MG, Lee JE, Kim YM, Choi WS. WZ3146 inhibits mast cell Lyn and Fyn to reduce IgE-mediated allergic responses in vitro and in vivo. Toxicol Appl Pharmacol 2019; 383:114763. [PMID: 31526816 DOI: 10.1016/j.taap.2019.114763] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 09/06/2019] [Accepted: 09/13/2019] [Indexed: 11/19/2022]
Abstract
Mast cells (MCs) play an important role as effector cells that cause allergic responses in allergic diseases. For these reasons, MC is considered an attractive therapeutic target for allergic disease treatment. In this study, we investigated the inhibitory effect of WZ3146, N-[3-[5-chloro-2-[4-(4-methylpiperazin-1-yl)anilino]pyrimidin-4-yl]oxyphenyl]prop-2-enamide, and the mechanisms of its actions on the MC activation and IgE-mediated allergic response by using three types of MCs such as rat basophilic leukemia (RBL)-2H3 cells, mouse bone marrow mast cells (BMMCs), and human Laboratory of Allergic Diseases 2 (LAD2) cells. WZ3146 inhibited antigen-stimulated degranulation in a dose-dependent manner (IC50, ~ 0.35 μM for RBL-2H3 cells; ~ 0.39 μM for BMMCs; ~ 0.41 for LAD2 cells). WZ3146 also suppressed the production of histamine, tumor necrosis factor (TNF)-α and interleukin (IL)-6, which mediate various allergic responses, in a dose-dependent manner. As the mechanism of WZ3146 to inhibit MCs, it inhibited the activation of spleen tyrosine kinase (Syk) and the downstream signaling proteins of Syk such as linker for activation of T cell (LAT) and phospholipase (PL) Cγ1 in the signaling pathway of FcεRI. In addition, WZ3146 inhibited the activation of Akt, extracellular signal-regulated kinase (ERK)1/2, p38, and c-Jun N-terminal kinase (JNK). However, WZ3146 did not inhibit degranulation of MCs by thapsigargin or ionomycin, which increase calcium concentration in cytosol. Notably, WZ3146 inhibited the activity of Lyn and Fyn, but not Syk. In an following animal experiment, WZ3146 inhibited IgE-dependent passive cutaneous anaphylaxis (PCA) in a dose-dependent manner (ED50, ~ 20 mg/kg). Taken together, in this study we show that the pyrimidine derivative, WZ3146, inhibits the IgE-mediated allergic response by inhibiting Lyn and Fyn Src-family kinases, which are initially activated by antigen stimulation in MCs. Therefore, we propose that WZ3146 could be used as a new therapeutic agent for the treatment of allergic diseases.
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Affiliation(s)
- Young Hwan Park
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Do Kyun Kim
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Hyuk Soon Kim
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Dajeong Lee
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Min Bum Lee
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Keun Young Min
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Min Geun Jo
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Ji Eon Lee
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Young Mi Kim
- College of Pharmacy, Duksung Women's University, Seoul 01369, Republic of Korea
| | - Wahn Soo Choi
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea.
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17
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Jeong DG, Ju HI, Choi YG, Roh CJ, Woo S, Choi WS, Lee JS. Nanoscale heat transport through the hetero-interface of SrRuO 3 thin films. Nanotechnology 2019; 30:374001. [PMID: 31181544 DOI: 10.1088/1361-6528/ab280d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A SrRuO3 thin film has been widely used as a metal electrode in electronic devices based on transition metal oxides, and hence it is important to understand its thermal transport properties to minimize a thermal degradation problem during the device operation. Using the time-domain thermoreflectance measurement technique, we investigate the cross-plane thermal conductivity of the SrRuO3 thin films with a thickness variation from 1 μm to 8 nm. We find that the thermal conductivity is reduced from about 6 W m-1 K-1 for the 1 μm thick film to about 1.2 W m-1 K-1 for the 8 nm thick film, and attribute this behavior to the boundary scattering of thermal carriers which originally have the mean free path of about 20 nm in a bulk state. Also, we observe a clear dip behavior of the thermal conductivity in the intermediate thickness around 30 nm which suggests an existence of a strong scattering source other than the film boundary. We explain this result by considering an additional interfacial scattering at the tetragonal-orthorhombic phase boundary which is formed during the strain relaxation with an increase of the film thickness.
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Affiliation(s)
- D G Jeong
- Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
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18
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Kim HS, Lee MB, Lee D, Min KY, Koo J, Kim HW, Park YH, Kim SJ, Ikutani M, Takaki S, Kim YM, Choi WS. The regulatory B cell-mediated peripheral tolerance maintained by mast cell IL-5 suppresses oxazolone-induced contact hypersensitivity. Sci Adv 2019; 5:eaav8152. [PMID: 31328158 PMCID: PMC6636983 DOI: 10.1126/sciadv.aav8152] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 06/10/2019] [Indexed: 06/10/2023]
Abstract
The function of regulatory immune cells in peripheral tissues is crucial to the onset and severity of various diseases. Interleukin-10 (IL-10)-producing regulatory B (IL-10+ Breg) cells are known to suppress various inflammatory diseases. However, evidence for the mechanism by which IL-10+ Breg cells are generated and maintained is still very limited. Here, we found that IL-10+ Breg cells suppress the activation of IL-13-producing type 2 innate lymphoid cells (IL-13+ ILC2s) in an IL-10-dependent manner in mice with oxazolone-induced severe contact hypersensitivity (CHS). Mast cell (MC) IL-5 was important for maintaining the population of IL-10+ Breg cells in peripheral lymphoid tissues. Overall, these results uncover a previously unknown mechanism of MCs as a type of immunoregulatory cell and elucidate the cross-talk among MCs, IL-10+ Breg cells, and IL-13+ ILC2s in CHS.
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Affiliation(s)
- Hyuk Soon Kim
- Department of Immunology, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Min Bum Lee
- Department of Immunology, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Dajeong Lee
- Department of Immunology, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Keun Young Min
- Department of Immunology, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Jimo Koo
- Department of Immunology, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Hyun Woo Kim
- Department of Immunology, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Young Hwan Park
- Department of Immunology, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Su Jeong Kim
- Department of Immunology, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Masashi Ikutani
- Department of Immune Regulation, The Research Center for Hepatitis and Immunology, Research Institute, National Center for Global Health and Medicine, Chiba 272-8516, Japan
| | - Satoshi Takaki
- Department of Immune Regulation, The Research Center for Hepatitis and Immunology, Research Institute, National Center for Global Health and Medicine, Chiba 272-8516, Japan
| | - Young Mi Kim
- Department of Preventive Pharmacy, College of Pharmacy, Duksung Women’s University, Seoul 01369, Korea
| | - Wahn Soo Choi
- Department of Immunology, School of Medicine, Konkuk University, Chungju 27478, Korea
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19
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Park YH, Kim HW, Kim HS, Nam ST, Lee D, Lee MB, Min KY, Koo J, Kim SJ, Kim YM, Kim HS, Choi WS. An Anti-Cancer Drug Candidate CYC116 Suppresses Type I Hypersensitive Immune Responses through the Inhibition of Fyn Kinase in Mast Cells. Biomol Ther (Seoul) 2019; 27:311-317. [PMID: 30332888 PMCID: PMC6513188 DOI: 10.4062/biomolther.2018.148] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [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: 08/01/2018] [Revised: 08/20/2018] [Accepted: 08/21/2018] [Indexed: 01/26/2023] Open
Abstract
Mast cells are the most prominent effector cells of Type 1 hypersensitivity immune responses. CYC116 [4-(2-amino-4-methyl-1,3-thiazol-5-yl)-N-[4-(morpholin-4-yl)phenyl] pyrimidin-2-amine] is under development to be used as an anti-cancer drug, but the inhibitory effects of CYC116 on the activation of mast cells and related allergy diseases have not reported as of yet. In this study, we demonstrated, for the first time, that CYC116 inhibited the degranulation of mast cells by antigen stimulation (IC50, ∼1.42 µM). CYC116 also inhibited the secretion of pro-inflammatory cytokines including TNF-α (IC50, ∼1.10 µM), and IL-6 (IC50, ∼1.24 µM). CYC116 inhibited the mast cell-mediated allergic responses, passive cutaneous anaphylaxis (ED50, ∼22.5 mg/kg), and passive systemic anaphylaxis in a dose-dependent manner in laboratory experiments performed on mice. Specifically, CYC116 inhibited the activity of Fyn in mast cells and inhibited the activation of Syk and Syk-dependent signaling proteins including LAT, PLCγ, Akt, and MAP kinases. Our results suggest that CYC116 could be used as an alternative therapeutic medication for mast cell-mediated allergic disorders, such as atopic dermatitis and allergic rhinitis.
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Affiliation(s)
- Young Hwan Park
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Hyun Woo Kim
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Hyuk Soon Kim
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Seung Taek Nam
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Dajeong Lee
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Min Bum Lee
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Keun Young Min
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Jimo Koo
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Su Jeong Kim
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Young Mi Kim
- College of Pharmacy, Duksung Women's University, Seoul 01369, Republic of Korea
| | - Hyung Sik Kim
- Division of Toxicology, College of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Wahn Soo Choi
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
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20
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Park JB, Choi WS, Chung TH, Lee SH, Kwak MK, Ha JS, Jeong T. Transfer printing of vertical-type microscale light-emitting diode array onto flexible substrate using biomimetic stamp. Opt Express 2019; 27:6832-6841. [PMID: 30876260 DOI: 10.1364/oe.27.006832] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 01/16/2019] [Indexed: 06/09/2023]
Abstract
We report the transfer printing of GaN-based microscale vertical-type light-emitting diodes (μ-VLEDs) using a functional layer and a biomimetic stamp. An oxide-based functional layer is inserted onto the structure of a μ-VLED and used to separate the chip from the μ-VLED wafer by absorbing the pulse of a UV pulse laser during pick-up of the transfer printing process. Polydimethylsiloxane (PDMS)-based biomimetic stamps have been fabricated to mimic the gecko lizard cilia for improved adhesion and repeatability. The biomimetic stamp has an adhesion force of 25.6 N/cm2, which is 12 times the adhesion of a flat stamp; an adhesion force of 10 N/cm2 or more was maintained after 100,000 repeated adhesion tests. A flexible 10 × 10 prototype array on a polyimide substrate was fabricated, and its bending test results indicated that the strain effect on the forward voltage and the output power was less than 1%. The stable bending test results of the prototype indicate that μ-VLEDs using biomimetic stamps allow the necessary stability for practical transfer printing.
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21
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Dey P, Kundu A, Chakraborty HJ, Kar B, Choi WS, Lee BM, Bhakta T, Atanasov AG, Kim HS. Therapeutic value of steroidal alkaloids in cancer: Current trends and future perspectives. Int J Cancer 2019; 145:1731-1744. [PMID: 30387881 PMCID: PMC6767045 DOI: 10.1002/ijc.31965] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [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: 03/27/2018] [Revised: 10/04/2018] [Accepted: 10/19/2018] [Indexed: 12/21/2022]
Abstract
Discovery and development of new potentially selective anticancer agents are necessary to prevent a global cancer health crisis. Currently, alternative medicinal agents derived from plants have been extensively investigated to develop anticancer drugs with fewer adverse effects. Among them, steroidal alkaloids are conventional secondary metabolites that comprise an important class of natural products found in plants, marine organisms and invertebrates, and constitute a judicious choice as potential anti-cancer leads. Traditional medicine and modern science have shown that representatives from this compound group possess potential antimicrobial, analgesic, anticancer and anti-inflammatory effects. Therefore, systematic and recapitulated information about the bioactivity of these compounds, with special emphasis on the molecular or cellular mechanisms, is of high interest. In this review, we methodically discuss the in vitro and in vivo potential of the anticancer activity of natural steroidal alkaloids and their synthetic and semi-synthetic derivatives. This review focuses on cumulative and comprehensive molecular mechanisms, which will help researchers understand the molecular pathways involving steroid alkaloids to generate a selective and safe new lead compound with improved therapeutic applications for cancer prevention and therapy. In vitro and in vivo studies provide evidence about the promising therapeutic potential of steroidal alkaloids in various cancer cell lines, but advanced pharmacokinetic and clinical experiments are required to develop more selective and safe drugs for cancer treatment.
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Affiliation(s)
- Prasanta Dey
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | - Amit Kundu
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | | | - Babli Kar
- Bengal Homoeopathic Medical College and Hospital, Asansol, India
| | - Wahn Soo Choi
- School of Medicine, Konkuk University, Chungju, Republic of Korea
| | - Byung Mu Lee
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | - Tejendra Bhakta
- Regional Institute of Pharmaceutical Science & Technology, Tripura, India
| | - Atanas G Atanasov
- Institute of Genetics and Animal Breeding of the Polish Academy of Sciences, Jastrzebiec, Poland.,Department of Pharmacognosy, University of Vienna, Vienna, Austria
| | - Hyung Sik Kim
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
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22
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Sachan R, Kundu A, Jeon Y, Choi WS, Yoon K, Kim IS, Kwak JH, Kim HS. Afrocyclamin A, a triterpene saponin, induces apoptosis and autophagic cell death via the PI3K/Akt/mTOR pathway in human prostate cancer cells. Phytomedicine 2018; 51:139-150. [PMID: 30466611 DOI: 10.1016/j.phymed.2018.10.012] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 10/04/2018] [Accepted: 10/09/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Afrocyclamin A, an oleanane-type triterpene saponin, was isolated from Androsace umbellata which used as a traditional herbal medicine. PURPOSE This study aimed to explore the anticancer activity of afrocyclamin A on human prostate cancer cells in vitro as well as in vivo. METHODS Cytotoxicity, cell cycle distribution, apoptosis, and autophagic cell death were measured following exposure to afrocyclamin A. In vivo antitumor activity of afrocyclamin A was assessed in a xenograft model. The protein levels of p-Akt, p-mTOR, Bax, Bcl-2, caspase-3, and caspase-9 were quantified using western blot analysis. RESULTS In DU145 cells, afrocyclamin A increased cytotoxicity, caused changes in cell morphology, and induced sub-G0/G1 phase indicating increased apoptosis. Afrocyclamin A robustly induced autophagic cell death as demonstrated by the conversion of LC3B-I to LC3B-II, and the formation of autophagic vacuoles as revealed by western blot analysis and fluorescence staining, respectively. Afrocyclamin A also inhibited the phosphorylation of PI3K, Akt, and mTOR, suggesting their role in afrocyclamin A induced cell death. In addition, afrocyclamin A inhibited cell migration and invasion in concentration and time-dependent manners. In an in vivo xenograft model, afrocyclamin A inhibited the growth of DU145 cells. CONCLUSION Afrocyclamin A has anticancer activity via the PI3K/Akt/mTOR pathway, which leads to cell death.
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Affiliation(s)
- Richa Sachan
- School of Pharmacy, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Amit Kundu
- School of Pharmacy, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Yukyoung Jeon
- School of Pharmacy, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Wahn Soo Choi
- Department of Immunology, School of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Kyungsil Yoon
- Comparative Biomedicine Research Branch, Division of Translational Science, Research Institute, National Cancer Center, Goyang-si, Gyeonggi-do 10408, Republic of Korea
| | - In Su Kim
- School of Pharmacy, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Jong Hwan Kwak
- School of Pharmacy, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea.
| | - Hyung Sik Kim
- School of Pharmacy, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea.
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23
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De U, Son JY, Jeon Y, Ha SY, Park YJ, Yoon S, Ha KT, Choi WS, Lee BM, Kim IS, Kwak JH, Kim HS. Plumbagin from a tropical pitcher plant (Nepenthes alata Blanco) induces apoptotic cell death via a p53-dependent pathway in MCF-7 human breast cancer cells. Food Chem Toxicol 2018; 123:492-500. [PMID: 30458268 DOI: 10.1016/j.fct.2018.11.040] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 11/14/2018] [Accepted: 11/16/2018] [Indexed: 12/16/2022]
Abstract
Plumbagin (5-hydroxy-2-methyl-1,4-naphthaquinone) has displayed antitumor activity in vitro and in animal models; however, the underlying molecular mechanisms have not been fully explored. The aim of this study was to investigate the anticancer effects of plumbagin isolated from Nepenthes alata against MCF-7 breast cancer cells. We examined the cytotoxicity, cell cycle regulation, apoptotic cell death, and generation of intracellular reactive oxygen species (ROS) in MCF-7 cells. Plumbagin exhibited potent cytotoxicity in MCF-7 cells (wild-type p53) compared to that in SK-OV-3 (null-type) human epithelial ovarian cancer cells. Specifically, plumbagin upregulated the expression of p21CIP1/WAF1 in MCF-7 cells, causing cell cycle arrest in the G2/M phase through inhibition of cyclin B1 levels. Plumbagin also significantly increased the ratio of Bax/Bcl-2 and release of cytochrome c, resulting in apoptotic cell death in MCF-7 cells. Furthermore, plumbagin dramatically increased the intracellular ROS level, whereas pretreatment with the ROS scavenger N-acetyl cysteine protected against plumbagin-induced cytotoxicity, suggesting that ROS formation plays a pivotal role in antitumor activity in MCF-7 cells. In mice bearing MCF-7 cell xenografts, plumbagin significantly reduced tumor growth and weight without apparent side effects. We therefore concluded that plumbagin exerts anticancer activity against MCF-7 cells through the generation of intracellular ROS, resulting in the induction of apoptosis via a p53-dependent pathway. This study thus identifies a new anticancer mechanism of plumbagin against p53-dependent breast cancer cells and suggests a novel strategy for overcoming of breast cancer therapy.
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Affiliation(s)
- Umasankar De
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Ji Yeon Son
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Yukyoung Jeon
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Song-Yi Ha
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Yu Jin Park
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Sungpil Yoon
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Ki-Tae Ha
- School of Korean Medicine and Healthy Aging Korean Medicine Research Center, Pusan National University, Yangsan, 50612, Republic of Korea
| | - Wahn Soo Choi
- School of Medicine, Konkuk University, Chungju, 27478, Republic of Korea
| | - Byung Mu Lee
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - In Su Kim
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Jong Hwan Kwak
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
| | - Hyung Sik Kim
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
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24
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Lee MB, Lee JH, Hong SH, You JS, Nam ST, Kim HW, Park YH, Lee D, Min KY, Park YM, Kim YM, Kim HS, Choi WS. JQ1, a BET inhibitor, controls TLR4-induced IL-10 production in regulatory B cells by BRD4-NF-κB axis. BMB Rep 2018; 50:640-646. [PMID: 29187284 PMCID: PMC5749911 DOI: 10.5483/bmbrep.2017.50.12.194] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Indexed: 01/07/2023] Open
Abstract
Regulatory B cells, also well-known as IL-10-producing B cells, play a role in the suppression of inflammatory responses. However, the epigenetic modulation of regulatory B cells is largely unknown. Recent studies showed that the bromodomain and extra-terminal domain (BET) protein inhibitor JQ1 controls the expression of various genes involving cell proliferation and cell cycle. However, the role of BET proteins on development of regulatory B cells is not reported. In this study, JQ1 potently suppressed IL-10 expression and secretion in murine splenic and peritoneal B cells. While bromodomain-containing protein 4 (BRD4) was associated with NF-κB on IL-10 promoter region by LPS stimulation, JQ1 interfered the interaction of BRD4 with NF-κB on IL-10 promoter. In summary, BRD4 is essential for toll like receptor 4 (TLR4)-mediated IL-10 expression, suggesting JQ1 could be a potential candidate in regulating IL-10-producing regulatory B cells in cancer.
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Affiliation(s)
- Min Bum Lee
- School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Jun-Ho Lee
- Department of Biomedical Chemistry, College of Biomedical & Health Science, Konkuk University, Chungju 27478, Korea
| | - Seong Hwi Hong
- School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Jueng Soo You
- School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Seung Taek Nam
- School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Hyun Woo Kim
- School of Medicine, Konkuk University, Chungju 27478, Korea
| | | | - Dajeong Lee
- School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Keun Young Min
- School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Yeong-Min Park
- School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Young Mi Kim
- College of Pharmacy, Duksung Women's University, Seoul 01369, Korea
| | - Hyuk Soon Kim
- School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Wahn Soo Choi
- School of Medicine, Konkuk University, Chungju 27478, Korea
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25
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Park YH, Kim DK, Kim HW, Kim HS, Lee D, Lee MB, Min KY, Koo J, Kim SJ, Kang C, Kim YM, Kim HS, Choi WS. Repositioning of anti-cancer drug candidate, AZD7762, to an anti-allergic drug suppressing IgE-mediated mast cells and allergic responses via the inhibition of Lyn and Fyn. Biochem Pharmacol 2018; 154:270-277. [PMID: 29777684 DOI: 10.1016/j.bcp.2018.05.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 05/15/2018] [Indexed: 01/26/2023]
Abstract
Mast cells are critical effector cells in IgE-mediated allergic responses. The aim of this study was to investigate the anti-allergic effects of 3-[(aminocarbonyl)amino]-5-(3-fluorophenyl)-N-(3S)-3-piperidinyl-2-thiophenecarboxamide (AZD7762) in vitro and in vivo. AZD7762 inhibited the antigen-stimulated degranulation from RBL-2H3 (IC50, ∼27.9 nM) and BMMCs (IC50, ∼99.3 nM) in a dose-dependent manner. AZD7762 also inhibited the production of TNF-α and IL-4. As the mechanism of its action, AZD7762 inhibited the activation of Syk and its downstream signaling proteins, such as Linker of activated T cells (LAT), phospholipase (PL) Cγ1, Akt, and mitogen-activated protein (MAP) kinases (Erk1/2, p38, and JNK) in mast cells. In in vitro protein kinase assay, AZD7762 inhibited the activity of Lyn and Fyn kinases, which are important for the activation of Syk in mast cells. Furthermore, AZD7762 also suppressed the degranulation of LAD2 human mast cells (IC50, ∼49.9 nM) and activation of Syk in a dose-dependent manner. As observed in experiments with mast cells in vitro, AZD7762 inhibited antigen-mediated passive cutaneous anaphylaxis in mice (ED50, ∼35.8 mg/kg). Altogether, these results suggest that AZD7762 could be used as a new therapeutic agent for mast cell-mediated allergic diseases.
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Affiliation(s)
- Young Hwan Park
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Do-Kyun Kim
- Mast Cell Biology Section, Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892, USA
| | - Hyun Woo Kim
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Hyuk Soon Kim
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Dajeong Lee
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Min Bum Lee
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Keun Young Min
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Jimo Koo
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Su Jeong Kim
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Changhee Kang
- Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul 05029, Republic of Korea
| | - Young Mi Kim
- College of Pharmacy, Duksung Women's University, Seoul 01369, Republic of Korea
| | - Hyung Sik Kim
- Division of Toxicology, College of Pharmacy, Sungkyunkwan University, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Wahn Soo Choi
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea.
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26
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Lumpkins CY, Filippi MK, Nazir N, Pacheco CM, Hester CM, Daley SM, Choi WS, Daley CM. It's not just about recruitment: An exploratory look at tobacco education sessions to increase participation into smoking cessation programs among American Indians. ACTA ACUST UNITED AC 2018; 3:1-4. [PMID: 34095515 PMCID: PMC8174104 DOI: 10.15761/hec.1000137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
American Indians (AI) have the highest smoking rates and lowest quit rates of any racial/ethnic group in the U.S. Researchers and community members from the American Indian Health Research and Education Alliance (AIHREA) created and evaluated a culturally-tailored smoking cessation program, All Nations Breath of Life (ANBL) as a recruitment tool for smoking cessation programs among AI. To increase enrollment in ANBL, AI smokers were approached at cultural events and asked to attend a 30-minute educational session (in-person, n= 179; tele-video, n=97). Tele-video (30%) and in-person (9%) session participants were recruited into ANBL. Pre- and post-tests showed participants in both sessions demonstrated increased motivation and confidence to quit smoking but significant differences were present in both sessions (p < 0.0001). Results indicate that theoretically guided and culturally tailored education sessions are viable approaches to educate and recruit underserved populations into programs that promote smoking cessation.
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Affiliation(s)
- C Y Lumpkins
- Department of Family Medicine, University of Kansas Medical Center, Kansas City, KS, 66160, USA.,Center for American Indian Community Health, University of Kansas Medical Center, Kansas City, KS, 66160, USA
| | | | - N Nazir
- Center for American Indian Community Health, University of Kansas Medical Center, Kansas City, KS, 66160, USA.,Department of Preventive Medicine & Public Health, University of Kansas Medical Center, Kansas City, KS, 66160, USA
| | | | - C M Hester
- Department of Family Medicine, University of Kansas Medical Center, Kansas City, KS, 66160, USA.,Center for American Indian Community Health, University of Kansas Medical Center, Kansas City, KS, 66160, USA
| | - S M Daley
- Center for American Indian Studies, Johnson County Community College, Kansas City, KS, 66210, USA
| | - W S Choi
- Center for American Indian Community Health, University of Kansas Medical Center, Kansas City, KS, 66160, USA.,Department of Preventive Medicine & Public Health, University of Kansas Medical Center, Kansas City, KS, 66160, USA
| | - C M Daley
- Department of Family Medicine, University of Kansas Medical Center, Kansas City, KS, 66160, USA.,Center for American Indian Community Health, University of Kansas Medical Center, Kansas City, KS, 66160, USA.,Department of Preventive Medicine & Public Health, University of Kansas Medical Center, Kansas City, KS, 66160, USA
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27
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Nam ST, Kim HW, Kim HS, Park YH, Lee D, Lee MB, Min KY, Kim YM, Choi WS. Furaltadone suppresses IgE-mediated allergic response through the inhibition of Lyn/Syk pathway in mast cells. Eur J Pharmacol 2018; 828:119-125. [PMID: 29588153 DOI: 10.1016/j.ejphar.2018.03.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 11/10/2017] [Revised: 03/22/2018] [Accepted: 03/22/2018] [Indexed: 11/25/2022]
Abstract
Mast cells are critical cells that prompt various allergic response-inducing factors, contributing to allergic diseases. While used as an antibiotic for livestock, there is no study on the effect of furaltadone on allergic response. This study investigated the effect of furaltadone on mast cells and passive cutaneous anaphylaxis (PCA). Furaltadone inhibited the degranulation of mast cells stimulated by antigen (IC50, ~ 3.9 μM), and also suppressed the production of tumor necrosis factor (TNF)-α and interleukin (IL)-4 in a concentration dependent manner. In addition, furaltadone inhibited allergic responses in an acute allergy animal model, PCA. Further investigation on the mechanism for these inhibitory effects of furaltadone found that the activities of Lyn/Syk and Syk-dependent downstream proteins such as mitogen-activated protein (MAP) kinases were inhibited by furaltadone in mast cells. Taken together, this study demonstrates that furaltadone inhibits the activation of mast cells by antigen via the suppression of the Lyn/Syk pathway and ameliorates allergic responses in vivo.
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Affiliation(s)
- Seung Taek Nam
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Hyun Woo Kim
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Hyuk Soon Kim
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Young Hwan Park
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Dajeong Lee
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Min Bum Lee
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Keun Young Min
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Young Mi Kim
- College of Pharmacy, Duksung Women's University, Seoul 01369, Republic of Korea.
| | - Wahn Soo Choi
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea.
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28
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Lee MH, Jang JH, Yoon GY, Lee SJ, Lee MG, Kang TH, Han HD, Kim HS, Choi WS, Park WS, Park YM, Jung ID. Neoagarohexaose-mediated activation of dendritic cells via Toll-like receptor 4 leads to stimulation of natural killer cells and enhancement of antitumor immunity. BMB Rep 2018; 50:263-268. [PMID: 28287066 PMCID: PMC5458676 DOI: 10.5483/bmbrep.2017.50.5.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Indexed: 01/01/2023] Open
Abstract
β-Agarase cleaves the β-1,4 linkages of agar to produce neoagarooligosaccharides (NAO), which are associated with various physiological functions. However, the immunological functions of NAO are still unclear. In this study, we demonstrated that β-agarase DagA-produced neoagarohexaose (DP6), an NAO product, promoted the maturation of dendritic cells (DCs) by Toll-like receptor 4 (TLR4). DP6 directly and indirectly enhanced the activation of natural killer (NK) cells in a TLR4-dependent manner in vitro and in vivo. Finally, the antitumor activity of DP6 against B16F1 melanoma cells was inhibited in NK cell-depletion systems by using NK-cell depleting antibodies in vivo. Collectively, the results indicated that DP6 augments antitumor immunity against B16F1 melanoma cells via the activation of DC-mediated NK cells in a TLR4-dependent manner. Thus, DP6 is a potential candidate adjuvant that acts as an immune cell modulator for the treatment of melanoma. [BMB Reports 2017; 50(5): 263-268].
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Affiliation(s)
- Moon Hee Lee
- Department of Immunology, Laboratory of Dendritic Cell Differentiation and Regulation, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Jong-Hwa Jang
- Department of Dental Hygiene, Hanseo University, Seosan 31962, Korea
| | - Gun Young Yoon
- Department of Immunology, Laboratory of Dendritic Cell Differentiation and Regulation, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Seung Jun Lee
- Department of Immunology, Laboratory of Dendritic Cell Differentiation and Regulation, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Min-Goo Lee
- Department of Physiology, Korea University, College of Medicine, Seoul 02841, Korea
| | - Tae Heung Kang
- Department of Immunology, Laboratory of Dendritic Cell Differentiation and Regulation, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Hee Dong Han
- Department of Immunology, Laboratory of Dendritic Cell Differentiation and Regulation, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Hyuk Soon Kim
- Department of Immunology, Laboratory of Dendritic Cell Differentiation and Regulation, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Wahn Soo Choi
- Department of Immunology, Laboratory of Dendritic Cell Differentiation and Regulation, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - Won Sun Park
- Institute of Medical Sciences, Department of Physiology, Kangwon National University School of Medicine, Chuncheon 24341, Korea
| | - Yeong-Min Park
- Department of Immunology, Laboratory of Dendritic Cell Differentiation and Regulation, School of Medicine, Konkuk University, Chungju 27478, Korea
| | - In Duk Jung
- Department of Immunology, Laboratory of Dendritic Cell Differentiation and Regulation, School of Medicine, Konkuk University, Chungju 27478, Korea
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29
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Lee KP, Baek S, Jung SH, Cui L, Lee D, Lee DY, Choi WS, Chung HW, Lee BH, Kim B, Won KJ. DJ-1 is involved in epigenetic control of sphingosine-1-phosphate receptor expression in vascular neointima formation. Pflugers Arch 2018; 470:1103-1113. [DOI: 10.1007/s00424-018-2132-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 02/12/2018] [Accepted: 02/21/2018] [Indexed: 01/30/2023]
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30
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Park HJ, Choi WS, Lee WY, Choi Y, Park C, Kim JH, Hong KH, Song H. A novel mouse model of atopic dermatitis that is T helper 2 (Th2)-polarized by an epicutaneous allergen. Environ Toxicol Pharmacol 2018; 58:122-130. [PMID: 29329020 DOI: 10.1016/j.etap.2017.12.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 12/27/2017] [Accepted: 12/28/2017] [Indexed: 06/07/2023]
Abstract
The pathogenesis of atopic dermatitis (AD) involves T helper 2 (Th2) cells, and effective therapies remain elusive due to the paucity of animal models. We aimed to develop a mouse model of an immune system aberration caused by allergen. Experiments were conducted in two phases. In experiment 1, BALB/c mice were sensitized with one of four chemical allergens - toluene diisocyanate (TDI), hexamethylene diisocyanate (HDI), trimellitic anhydride (TMA), or 2,4-dinitrochlorobenzene (DNCB) - for 3 weeks. Based on results of experiment 1, immunological features were compared between TMA-sensitized BALB/c mice and NC/Nga mice, after exposure to mite extracts, harmful chemicals and detergents in experiment 2. Sensitization by allergen caused a large number of pathological changes in the skin, and an increase in mast cell number. TMA-sensitized BALB/c mice models showed higher sensitivity to an environmental allergen than NC/Nga mice did. Overall, the initial sensitization with TMA leads to disturbances in Th2-mediated immunity.
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Affiliation(s)
- Hyun Jung Park
- Department of Stem Cell and Regenerative Biology, Konkuk University, 120 Neungdongro, Gwangjin-gu, Seoul 05029, Republic of Korea
| | - Wahn Soo Choi
- School of Medicine, Konkuk University, 120 Neungdongro, Gwangjin-gu, Seoul 143-701, Republic of Korea
| | - Won Young Lee
- Department of Beef and Dairy Science, Korea National College of Agricultures and Fisheries, Jeonju-si 54874, Republic of Korea
| | - Youngsok Choi
- Department of Biomedical Sciences, CHA University, Seongnam-si, Gyeonggi-do, Republic of Korea
| | - Chankyu Park
- Department of Stem Cell and Regenerative Biology, Konkuk University, 120 Neungdongro, Gwangjin-gu, Seoul 05029, Republic of Korea
| | - Jin Hoi Kim
- Department of Stem Cell and Regenerative Biology, Konkuk University, 120 Neungdongro, Gwangjin-gu, Seoul 05029, Republic of Korea
| | - Kwon Ho Hong
- Department of Stem Cell and Regenerative Biology, Konkuk University, 120 Neungdongro, Gwangjin-gu, Seoul 05029, Republic of Korea
| | - Hyuk Song
- Department of Stem Cell and Regenerative Biology, Konkuk University, 120 Neungdongro, Gwangjin-gu, Seoul 05029, Republic of Korea.
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Lee D, Kim HS, Shin E, Do SG, Lee CK, Kim YM, Lee MB, Min KY, Koo J, Kim SJ, Nam ST, Kim HW, Park YH, Choi WS. Polysaccharide isolated from Aloe vera gel suppresses ovalbumin-induced food allergy through inhibition of Th2 immunity in mice. Biomed Pharmacother 2018; 101:201-210. [PMID: 29494957 DOI: 10.1016/j.biopha.2018.02.061] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [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: 11/30/2017] [Revised: 02/09/2018] [Accepted: 02/15/2018] [Indexed: 12/15/2022] Open
Abstract
An allergic reaction occurs when the immune system overreacts to harmless substance called allergen that gains access to the body. Food allergy is a hypersensitive immune reaction to food proteins and the number of patients with food allergy has recently increased. Aloe Vera is used for wellness and medicinal purposes. In particular, Aloe vera has been reported to enhance immunity. However, the effect of Aloe vera on food allergy is not yet known. In this study, we investigated the effects of processed Aloe vera gel (PAG) containing low molecular weight Aloe polysaccharide (AP) on ovalbumin (OVA)-induced food allergy in mice. Allergic symptoms, rectal temperature, and diarrhea were measured in OVA-induced food allergy mice. Other allergic parameters were also analyzed by RT-PCR, ELISA, flow cytometry, and other biochemical methods. As the results, PAG suppressed the decrease of body temperature, diarrhea, and allergic symptoms in OVA-induced food allergy mice. PAG also reduced serum concentrations of type 2 helper T cell (Th2) cytokines (Interleukin-(IL)-4, IL-5, and IL-13) as well as histamine, mast cell protease-1 (MCP-1), and immunoglobulin (Ig)E. PAG blocked the degranulation of mast cells and infiltration of eosinophils in intestine. Furthermore, PAG suppressed the population of Th2 cells in spleen and mesenteric lymph nodes. PAG also increased the production of IL-10 and population of type 1 regulatory T (Tr1) cells in mice with food allergy. Taken together, our findings suggest that PAG suppressed Th2 immune responses through, at least partially, stimulating the secretion of IL-10 in food allergy mice.
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Affiliation(s)
- Dajeong Lee
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Hyuk Soon Kim
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Eunju Shin
- Univera Inc., Seoul 04782, Republic of Korea
| | - Seon-Gil Do
- Univera Inc., Seoul 04782, Republic of Korea
| | - Chong-Kil Lee
- College of Pharmacy, Chungbuk National University, Cheongju 28644, Republic of Korea
| | - Young Mi Kim
- College of Pharmacy, Duksung Women's University, Seoul 01369, Republic of Korea
| | - Min Bum Lee
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Keun Young Min
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Jimo Koo
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Su Jeong Kim
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Seung Taek Nam
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Hyun Woo Kim
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Young Hwan Park
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea
| | - Wahn Soo Choi
- Department of Immunology, College of Medicine, Konkuk University, Chungju 27478, Republic of Korea.
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Hong SH, Eun JW, Choi SK, Shen Q, Choi WS, Han JW, Nam SW, You JS. Epigenetic reader BRD4 inhibition as a therapeutic strategy to suppress E2F2-cell cycle regulation circuit in liver cancer. Oncotarget 2018; 7:32628-40. [PMID: 27081696 PMCID: PMC5078039 DOI: 10.18632/oncotarget.8701] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [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: 01/07/2016] [Accepted: 03/28/2016] [Indexed: 01/04/2023] Open
Abstract
Deregulation of the epigenome component affects multiple pathways in the cancer phenotype since the epigenome acts at the pinnacle of the hierarchy of gene expression. Pioneering work over the past decades has highlighted that targeting enzymes or proteins involved in the epigenetic regulation is a valuable approach to cancer therapy. Very recent results demonstrated that inhibiting the epigenetic reader BRD4 has notable efficacy in diverse cancer types. We investigated the potential of BRD4 as a therapeutic target in liver malignancy. BRD4 was overexpressed in three different large cohort of hepatocellular carcinoma (HCC) patients as well as in liver cancer cell lines. BRD4 inhibition by JQ1 induced anti-tumorigenic effects including cell cycle arrest, cellular senescence, reduced wound healing capacity and soft agar colony formation in liver cancer cell lines. Notably, BRD4 inhibition caused MYC-independent large-scale gene expression changes in liver cancer cells. Serial gene expression analyses with SK-Hep1 liver cancer cells treated with JQ1 to delineate the key player of BRD4 inhibition identified E2F2 as the first line of downstream direct target of BRD4. Further experiments including chromatin immunoprecipitation (ChIP) assay and loss of function study confirmed E2F2 as key player of BRD4 inhibition. Overexpressed E2F2 is a crucial center of cell cycle regulation and high expression of E2F2 is significantly associated with poor prognosis of HCC patients. Our findings reveal BRD4-E2F2-cell cycle regulation as a novel molecular circuit in liver cancer and provide a therapeutic strategy and innovative insights for liver cancer therapies.
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Affiliation(s)
- Seong Hwi Hong
- Konkuk University Medical Center, School of Medicine, Konkuk University, Seoul 143-701, Korea
| | - Jung Woo Eun
- Functional RNomics Research Center, College of Medicine, The Catholic University, Seoul 137-701, Korea
| | - Sung Kyung Choi
- Konkuk University Medical Center, School of Medicine, Konkuk University, Seoul 143-701, Korea
| | - Qingyu Shen
- Functional RNomics Research Center, College of Medicine, The Catholic University, Seoul 137-701, Korea
| | - Wahn Soo Choi
- Konkuk University Medical Center, School of Medicine, Konkuk University, Seoul 143-701, Korea
| | - Jeung-Whan Han
- Research Center for Epigenome Regulation, School of Pharmacy, Sungkyunkwan University, Suwon 440-746, Korea
| | - Suk Woo Nam
- Functional RNomics Research Center, College of Medicine, The Catholic University, Seoul 137-701, Korea
| | - Jueng Soo You
- Konkuk University Medical Center, School of Medicine, Konkuk University, Seoul 143-701, Korea
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Kim HS, Nam ST, Mun SH, Lee SK, Kim HW, Park YH, Kim B, Won KJ, Kim HR, Park YM, Kim HS, Beaven MA, Kim YM, Choi WS. DJ-1 controls bone homeostasis through the regulation of osteoclast differentiation. Nat Commun 2017; 8:1519. [PMID: 29142196 PMCID: PMC5688089 DOI: 10.1038/s41467-017-01527-y] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Accepted: 09/25/2017] [Indexed: 11/09/2022] Open
Abstract
Receptor activator of NF-kB ligand (RANKL) generates intracellular reactive oxygen species (ROS), which increase RANKL-mediated signaling in osteoclast (OC) precursor bone marrow macrophages (BMMs). Here we show that a ROS scavenging protein DJ-1 negatively regulates RANKL-driven OC differentiation, also called osteoclastogenesis. DJ-1 ablation in mice leads to a decreased bone volume and an increase in OC numbers. In vitro, the activation of RANK-dependent signals is enhanced in DJ-1-deficient BMMs as compared to wild-type BMMs. DJ-1 suppresses the activation of both RANK-TRAF6 and RANK-FcRγ/Syk signaling pathways because of activation of Src homology region 2 domain-containing phosphatase-1, which is inhibited by ROS. Ablation of DJ-1 in mouse models of arthritis and RANKL-induced bone disease leads to an increase in the number of OCs, and exacerbation of bone damage. Overall, our results suggest that DJ-1 plays a role in bone homeostasis in normal physiology and in bone-associated pathology by negatively regulating osteoclastogenesis. Osteoclasts are involved in arthritis, and their differentiation depends on RANKL signaling. The author show that the ROS-scavenging protein DJ-1 negatively regulates RANKL signaling and that its ablation increases osteoclast numbers and exacerbates bone damage in mouse models of arthritis.
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Affiliation(s)
- Hyuk Soon Kim
- Department of Immunology and Physiology, School of Medicine, Konkuk University, Chungju, 380-701, Republic of Korea
| | - Seung Taek Nam
- Department of Immunology and Physiology, School of Medicine, Konkuk University, Chungju, 380-701, Republic of Korea
| | - Se Hwan Mun
- Department of Immunology and Physiology, School of Medicine, Konkuk University, Chungju, 380-701, Republic of Korea.,Department of Medicine, University of Connecticut Health Center, 263 Farmington Ave, Farmington, CT, 06030, USA
| | - Sun-Kyeong Lee
- Department of Medicine, University of Connecticut Health Center, 263 Farmington Ave, Farmington, CT, 06030, USA
| | - Hyun Woo Kim
- Department of Immunology and Physiology, School of Medicine, Konkuk University, Chungju, 380-701, Republic of Korea
| | - Young Hwan Park
- Department of Immunology and Physiology, School of Medicine, Konkuk University, Chungju, 380-701, Republic of Korea
| | - Bokyung Kim
- Department of Immunology and Physiology, School of Medicine, Konkuk University, Chungju, 380-701, Republic of Korea
| | - Kyung-Jong Won
- Department of Immunology and Physiology, School of Medicine, Konkuk University, Chungju, 380-701, Republic of Korea
| | - Hae-Rim Kim
- Department of Rheumatology, School of Medicine, Konkuk University, Chungju, 380-701, Republic of Korea
| | - Yeong-Min Park
- Department of Immunology and Physiology, School of Medicine, Konkuk University, Chungju, 380-701, Republic of Korea
| | - Hyung Sik Kim
- Department of Toxicology, School of Pharmacy, Sungkyunkwan University, Suwon, 440-746, Republic of Korea
| | - Michael A Beaven
- Laboratory of Molecular Immunology, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Young Mi Kim
- Department of Preventive Pharmacy, College of Pharmacy, Duksung Women's University, Seoul, 132-714, Republic of Korea
| | - Wahn Soo Choi
- Department of Immunology and Physiology, School of Medicine, Konkuk University, Chungju, 380-701, Republic of Korea.
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Cho M, Lee JE, Lim H, Shin HW, Khalmuratova R, Choi G, Kim HS, Choi WS, Park YJ, Shim I, Kim BS, Kang CY, Kim JO, Tanaka S, Kubo M, Tung HY, Landers CT, Corry DB, Kheradmand F, Chung Y. Fibrinogen cleavage products and Toll-like receptor 4 promote the generation of programmed cell death 1 ligand 2-positive dendritic cells in allergic asthma. J Allergy Clin Immunol 2017; 142:530-541.e6. [PMID: 29038008 DOI: 10.1016/j.jaci.2017.09.019] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 08/23/2017] [Accepted: 09/22/2017] [Indexed: 10/18/2022]
Abstract
BACKGROUND Inhaled protease allergens preferentially trigger TH2-mediated inflammation in allergic asthma. The role of dendritic cells (DCs) on induction of TH2 cell responses in allergic asthma has been well documented; however, the mechanism by which protease allergens induce TH2-favorable DCs in the airway remains unclear. OBJECTIVE We sought to determine a subset of DCs responsible for TH2 cell responses in allergic asthma and the mechanism by which protease allergens induce the DC subset in the airway. METHODS Mice were challenged intranasally with protease allergens or fibrinogen cleavage products (FCPs) to induce allergic airway inflammation. DCs isolated from mediastinal lymph nodes were analyzed for surface phenotype and T-cell stimulatory function. Anti-Thy1.2 and Mas-TRECK mice were used to deplete innate lymphoid cells and mast cells, respectively. Adoptive cell transfer, bone marrow DC culture, anti-IL-13, and Toll-like receptor (TLR) 4-deficient mice were used for further mechanistic studies. RESULTS Protease allergens induced a remarkable accumulation of TH2-favorable programmed cell death 1 ligand 2 (PD-L2)+ DCs in mediastinal lymph nodes, which was significantly abolished in mice depleted of mast cells and, to a lesser extent, innate lymphoid cells. Mechanistically, FCPs generated by protease allergens triggered IL-13 production from wild-type mast cells but not from TLR4-deficient mast cells, which resulted in an increase in the number of PD-L2+ DCs. Intranasal administration of FCPs induced an increase in numbers of PD-L2+ DCs in the airway, which was significantly abolished in TLR4- and mast cell-deficient mice. Injection of IL-13 restored the PD-L2+ DC population in mice lacking mast cells. CONCLUSION Our findings unveil the "protease-FCP-TLR4-mast cell-IL-13" axis as a molecular mechanism for generation of TH2-favorable PD-L2+ DCs in allergic asthma and suggest that targeting the PD-L2+ DC pathway might be effective in suppressing allergic T-cell responses in the airway.
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Affiliation(s)
- Minkyoung Cho
- Laboratory of Immune Regulation, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Korea
| | - Jeong-Eun Lee
- Laboratory of Immune Regulation, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Korea
| | - Hoyong Lim
- Laboratory of Immune Regulation, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Korea
| | - Hyun-Woo Shin
- Department of Pharmacology, College of Medicine, Seoul National University, Seoul, Korea; Department of Biomedical Sciences and Otorhinolaryngology-Head and Neck Surgery, Seoul National University Hospital, Seoul, Korea
| | - Roza Khalmuratova
- Department of Pharmacology, College of Medicine, Seoul National University, Seoul, Korea
| | - Garam Choi
- Laboratory of Immune Regulation, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Korea
| | | | | | - Young-Jun Park
- Laboratory of Immune Regulation, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Korea
| | - Inbo Shim
- Laboratory of Immune Regulation, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Korea
| | - Byung-Seok Kim
- Laboratory of Immune Regulation, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Korea
| | - Chang-Yuil Kang
- Laboratory of Immune Regulation, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Korea
| | - Jae-Ouk Kim
- Laboratory Science Division, International Vaccine Institute, Seoul, Korea
| | - Shinya Tanaka
- Research Institute for Biomedical Science, Tokyo University of Science, Tokyo, and the RIKEN Center for Integrative Medical Sciences (IMS), Yokohama, Japan
| | - Masato Kubo
- Research Institute for Biomedical Science, Tokyo University of Science, Tokyo, and the RIKEN Center for Integrative Medical Sciences (IMS), Yokohama, Japan
| | - Hui-Ying Tung
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, Tex
| | - Cameron T Landers
- Program in Translational Biology and Molecular Medicine, Baylor College of Medicine, Houston, Tex
| | - David B Corry
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, Tex; Department of Medicine, Baylor College of Medicine, Houston, Tex; Biology of Inflammation Center, Baylor College of Medicine, Houston, Tex
| | - Farrah Kheradmand
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, Tex; Department of Medicine, Baylor College of Medicine, Houston, Tex; Biology of Inflammation Center, Baylor College of Medicine, Houston, Tex
| | - Yeonseok Chung
- Laboratory of Immune Regulation, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Korea.
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Kim HS, Jang JH, Lee MB, Jung ID, Kim YM, Park YM, Choi WS. A novel IL-10-producing innate lymphoid cells (ILC10) in a contact hypersensitivity mouse model. BMB Rep 2017; 49:293-6. [PMID: 26949018 PMCID: PMC5070710 DOI: 10.5483/bmbrep.2016.49.5.023] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Indexed: 12/05/2022] Open
Abstract
The immunoregulatory cytokine Interleukin 10 (IL-10) protein is produced by various cells during the course of inflammatory disorders. Mainly, it downregulates pro-inflammatory cytokines, antigen presentation, and helper T cell activation. In this study, we show that the ratio of IL-10-producing cells was significantly increased in lineage negative (i.e., not T, B, or leukocyte cell lineages) cells than in lineage positive cells in lymphoid and peripheral tissues. We further observed that IL-10-producing innate lymphoid cells (ILCs), here called firstly ILC10, were increased in number in oxazolone-induced contact hypersensitivity (CHS) mice. In detail, IL-10-producing lineage negative cells were elevated in the axillary, inguinal lymph node, and ear tissues of CHS mice. Notably, the cells expressed classical ILC marker proteins such as CD45, CD127, and Sca-1. Altogether, our findings suggest for the first time that ILC10s are present in various physiological settings and could be involved in numerous immune responses as regulatory cells. [BMB Reports 2016; 49(5): 293-296]
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Affiliation(s)
- Hyuk Soon Kim
- Department of Immunology, School of medicine, Konkuk University, Chungju 27478, Korea
| | - Jong-Hwa Jang
- Department of Dental Hygiene, Hanseo University, Seosan 31962, Korea
| | - Min Bum Lee
- Department of Immunology, School of medicine, Konkuk University, Chungju 27478, Korea
| | - In Duk Jung
- Department of Immunology, School of medicine, Konkuk University, Chungju 27478, Korea
| | - Young Mi Kim
- College of Pharmacy, Duksung Women's University, Seoul 01369, Korea
| | - Yeong-Min Park
- Department of Immunology, School of medicine, Konkuk University, Chungju 27478, Korea
| | - Wahn Soo Choi
- Department of Immunology, School of medicine, Konkuk University, Chungju 27478, Korea
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Park EY, Woo Y, Kim SJ, Kim DH, Lee EK, De U, Kim KS, Lee J, Jung JH, Ha KT, Choi WS, Kim IS, Lee BM, Yoon S, Moon HR, Kim HS. Anticancer Effects of a New SIRT Inhibitor, MHY2256, against Human Breast Cancer MCF-7 Cells via Regulation of MDM2-p53 Binding. Int J Biol Sci 2016; 12:1555-1567. [PMID: 27994519 PMCID: PMC5166496 DOI: 10.7150/ijbs.13833] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [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: 09/13/2015] [Accepted: 09/30/2016] [Indexed: 12/28/2022] Open
Abstract
The sirtuins (SIRTs), a family of NAD+-dependent class III histone deacetylase, are involved in various biological processes including cell survival, division, senescence, and metabolism via activation of the stress-response pathway. Recently, inhibition of SIRTs has been considered a promising anticancer strategy, but their precise mechanisms of action are not well understood. In particular, the relevance of p53 to SIRT-induced effects has not been fully elucidated. We investigated the anticancer effects of a novel SIRT inhibitor, MHY2256, and its efficacy was compared to that of salermide in MCF-7 (wild-type p53) and SKOV-3 (null-type p53) cells. Cell viability, SIRT1 enzyme activity, cell cycle regulation, apoptosis, and autophagic cell death were measured. We compared sensitivity to cytotoxicity in MCF-7 and SKOV-3 cells. MHY2256 significantly decreased the viability of MCF-7 (IC50, 4.8 μM) and SKOV-3 (IC50, 5.6 μM) cells after a 48 h treatment period. MHY2256 showed potent inhibition (IC50, 0.27 mM) against SIRT1 enzyme activity compared with nicotinamide (IC50, >1 mM). Moreover, expression of SIRT (1, 2, or 3) protein levels was significantly reduced by MHY2256 treatment in both MCF-7 and SKOV-3 cells. Flow cytometry analysis revealed that MHY2256 significantly induced cell cycle arrest in the G1 phase, leading to an effective increase in apoptotic cell death in MCF-7 and SKOV-3 cells. A significant increase in acetylated p53, a target protein of SIRT, was observed in MCF-7 cells after MHY2256 treatment. MHY2256 up-regulated LC3-II and induced autophagic cell death in MCF-7 cells. Furthermore, MHY2256 markedly inhibited tumor growth in a tumor xenograft model of MCF-7 cells. These results suggest that a new SIRT inhibitor, MHY2256, has anticancer activity through p53 acetylation in MCF-7 human breast cancer cells.
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Affiliation(s)
- Eun Young Park
- College of Pharmacy, Pusan National University, San 30, Jangjeon-dong, Geumjeung-gu, Busan, 609-735, Republic of Korea
| | - Youngwoo Woo
- College of Pharmacy, Pusan National University, San 30, Jangjeon-dong, Geumjeung-gu, Busan, 609-735, Republic of Korea
| | - Seong Jin Kim
- College of Pharmacy, Pusan National University, San 30, Jangjeon-dong, Geumjeung-gu, Busan, 609-735, Republic of Korea
| | - Do Hyun Kim
- College of Pharmacy, Pusan National University, San 30, Jangjeon-dong, Geumjeung-gu, Busan, 609-735, Republic of Korea
| | - Eui Kyung Lee
- College of Pharmacy, Pusan National University, San 30, Jangjeon-dong, Geumjeung-gu, Busan, 609-735, Republic of Korea
| | - Umasankar De
- School of Pharmacy, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon 440-746, Republic of Korea
| | - Kyeong Seok Kim
- School of Pharmacy, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon 440-746, Republic of Korea
| | - Jaewon Lee
- College of Pharmacy, Pusan National University, San 30, Jangjeon-dong, Geumjeung-gu, Busan, 609-735, Republic of Korea
| | - Jee H Jung
- College of Pharmacy, Pusan National University, San 30, Jangjeon-dong, Geumjeung-gu, Busan, 609-735, Republic of Korea
| | - Ki-Tae Ha
- Department of Korean Medical Science, School of Korean Medicine and Korean Medicine Research Center for Healthy Aging, Pusan National University, Yangsan, Gyeongsangnam-do, Republic of Korea
| | - Wahn Soo Choi
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - In Su Kim
- School of Pharmacy, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon 440-746, Republic of Korea
| | - Byung Mu Lee
- School of Pharmacy, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon 440-746, Republic of Korea
| | - Sungpil Yoon
- School of Pharmacy, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon 440-746, Republic of Korea
| | - Hyung Ryong Moon
- College of Pharmacy, Pusan National University, San 30, Jangjeon-dong, Geumjeung-gu, Busan, 609-735, Republic of Korea
| | - Hyung Sik Kim
- School of Pharmacy, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon 440-746, Republic of Korea
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Won AJ, Kim S, Kim YG, Kim KB, Choi WS, Kacew S, Kim KS, Jung JH, Lee BM, Kim S, Kim HS. Discovery of urinary metabolomic biomarkers for early detection of acute kidney injury. Mol Biosyst 2016; 12:133-44. [PMID: 26566257 DOI: 10.1039/c5mb00492f] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The discovery of new biomarkers for early detection of drug-induced acute kidney injury (AKI) is clinically important. In this study, sensitive metabolomic biomarkers identified in the urine of rats were used to detect cisplatin-induced AKI. Cisplatin (10 mg kg(-1), i.p.) was administered to Sprague-Dawley rats, which were subsequently euthanized after 1, 3 or 5 days. In cisplatin-treated rats, mild histopathological alterations were noted at day 1, and these changes were severe at days 3 and 5. Blood urea nitrogen (BUN) and serum creatinine (SCr) levels were significantly increased at days 3 and 5. The levels of new urinary protein-based biomarkers, including kidney injury molecule-1 (KIM-1), glutathione S-transferase-α (GST-α), tissue inhibitor of metalloproteinase-1 (TIMP-1), vascular endothelial growth factor (VEGF), calbindin, clusterin, neutrophil, neutrophil gelatinase-associated lipocalin (NGAL), and osteopontin, were significantly elevated at days 3 and 5. Among urinary metabolites, trigonelline and 3-indoxylsulfate (3-IS) levels were significantly decreased in urine collected from cisplatin-treated rats prior to histological kidney damage. However, carbon tetrachloride (CCl4), a hepatotoxicant, did not affect these urinary biomarkers. Trigonelline is closely associated with GSH depletion and results in insufficient antioxidant capacity against cisplatin-induced AKI. The predominant cisplatin-induced AKI marker appeared to be reduced in urinary 3-IS levels. Because 3-IS is predominantly excreted via active secretion in proximal tubules, a decrease is indicative of tubular damage. Further, urinary excretion of 3-IS levels was markedly reduced in patients with AKI compared to normal subjects. The area under the curve receiver operating characteristics (AUC-ROC) for 3-IS was higher than for SCr, BUN, lactate dehydrogenase (LDH), total protein, and glucose. Therefore, low urinary or high serum 3-IS levels may be more useful for early detection of AKI than conventional biomarkers.
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Affiliation(s)
- A Jin Won
- College of Pharmacy, Pusan National University, Busan, 609-735, Republic of Korea
| | - Siwon Kim
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan, 609-735, Republic of Korea
| | - Yoon Gyoon Kim
- College of Pharmacy, Dankook University, 119, Dandae-ro, Dongnam-gu, Cheonan-si, Chungnam 330-714, Republic of Korea
| | - Kyu-Bong Kim
- College of Pharmacy, Dankook University, 119, Dandae-ro, Dongnam-gu, Cheonan-si, Chungnam 330-714, Republic of Korea
| | - Wahn Soo Choi
- School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - Sam Kacew
- McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Ontario, Canada
| | - Kyeong Seok Kim
- School of Pharmacy, Sungkyunkwan University, Suwon, 440-746, Republic of Korea.
| | - Jee H Jung
- College of Pharmacy, Pusan National University, Busan, 609-735, Republic of Korea
| | - Byung Mu Lee
- School of Pharmacy, Sungkyunkwan University, Suwon, 440-746, Republic of Korea.
| | - Suhkmann Kim
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan, 609-735, Republic of Korea
| | - Hyung Sik Kim
- School of Pharmacy, Sungkyunkwan University, Suwon, 440-746, Republic of Korea.
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Kim CJ, Choi WS, Jung Y, Kiem S, Seol HY, Woo HJ, Choi YH, Son JS, Kim KH, Kim YS, Kim ES, Park SH, Yoon JH, Choi SM, Lee H, Oh WS, Choi SY, Kim NJ, Choi JP, Park SY, Kim J, Jeong SJ, Lee KS, Jang HC, Rhee JY, Kim BN, Bang JH, Lee JH, Park S, Kim HY, Choi JK, Wi YM, Choi HJ. Surveillance of the Middle East respiratory syndrome (MERS) coronavirus (CoV) infection in healthcare workers after contact with confirmed MERS patients: incidence and risk factors of MERS-CoV seropositivity. Clin Microbiol Infect 2016; 22:880-886. [PMID: 27475739 PMCID: PMC7128923 DOI: 10.1016/j.cmi.2016.07.017] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 07/11/2016] [Accepted: 07/16/2016] [Indexed: 01/16/2023]
Abstract
Given the mode of transmission of Middle East respiratory syndrome (MERS), healthcare workers (HCWs) in contact with MERS patients are expected to be at risk of MERS infections. We evaluated the prevalence of MERS coronavirus (CoV) immunoglobulin (Ig) G in HCWs exposed to MERS patients and calculated the incidence of MERS-affected cases in HCWs. We enrolled HCWs from hospitals where confirmed MERS patients had visited. Serum was collected 4 to 6 weeks after the last contact with a confirmed MERS patient. We performed an enzyme-linked immunosorbent assay (ELISA) to screen for the presence of MERS-CoV IgG and an indirect immunofluorescence test (IIFT) to confirm MERS-CoV IgG. We used a questionnaire to collect information regarding the exposure. We calculated the incidence of MERS-affected cases by dividing the sum of PCR-confirmed and serology-confirmed cases by the number of exposed HCWs in participating hospitals. In total, 1169 HCWs in 31 hospitals had contact with 114 MERS patients, and among the HCWs, 15 were PCR-confirmed MERS cases in study hospitals. Serologic analysis was performed for 737 participants. ELISA was positive in five participants and borderline for seven. IIFT was positive for two (0.3%) of these 12 participants. Among the participants who did not use appropriate personal protective equipment (PPE), seropositivity was 0.7% (2/294) compared to 0% (0/443) in cases with appropriate PPE use. The incidence of MERS infection in HCWs was 1.5% (17/1169). The seroprevalence of MERS-CoV IgG among HCWs was higher among participants who did not use appropriate PPE.
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Affiliation(s)
- C-J Kim
- Department of Internal Medicine, Division of Infectious Diseases, Ewha Womans University School of Medicine, South Korea
| | - W S Choi
- Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, South Korea
| | - Y Jung
- Department of Internal Medicine, Konyang University Hospital, South Korea
| | - S Kiem
- Department of Internal Medicine, Inje University Haeundae Paik Hospital, South Korea
| | - H Y Seol
- Department of Internal Medicine, Good GangAn Hospital, South Korea
| | - H J Woo
- Department of Internal Medicine, Hallym University Dongtan Sacred Heart Hospital, South Korea
| | - Y H Choi
- Department of Internal Medicine, Ajou University Hospital, South Korea
| | - J S Son
- Department of Internal Medicine, Kyung Hee University Hospital at Gangdong, South Korea
| | - K-H Kim
- Department of Internal Medicine, Pusan National University Hospital, South Korea
| | - Y-S Kim
- Division of Infectious Diseases, Department of Internal Medicine, Chungnam National University School of Medicine, South Korea
| | - E S Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, South Korea
| | - S H Park
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Daejeon St. Mary's Hospital, South Korea
| | - J H Yoon
- Department of Internal Medicine, Eulji University Hospital, South Korea
| | - S-M Choi
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Yeouido St. Mary's Hospital, South Korea
| | - H Lee
- Division of Infectious Diseases, Dong-A University Hospital, South Korea
| | - W S Oh
- Department of Internal Medicine, Kangwon National University Hospital, South Korea
| | - S-Y Choi
- Department of Neurology, Dae Cheong Hospital, South Korea
| | - N-J Kim
- Department of Internal Medicine, Seoul National University Hospital, South Korea
| | - J-P Choi
- Department of Internal Medicine, Seoul Medical Center, South Korea
| | - S Y Park
- Department of Internal Medicine, Hallym University Kangdong Sacred Heart Hospital, South Korea
| | - J Kim
- Department of Internal Medicine, Hanyang University Guri Hospital, South Korea
| | - S J Jeong
- Department of Internal Medicine, Gangnam Severance Hospital, South Korea
| | - K S Lee
- Department of Internal Medicine, Myongji Hospital, South Korea
| | - H C Jang
- Department of Internal Medicine, Chonnam National University Hospital, South Korea
| | - J Y Rhee
- Department of Internal Medicine, Dankook University Hospital, South Korea
| | - B-N Kim
- Department of Internal Medicine, Inje University Sanggye Paik Hospital, South Korea
| | - J H Bang
- Department of Internal Medicine, Borame Medical Center, South Korea
| | - J H Lee
- Department of Internal Medicine, Wonkwang University Hospital, South Korea
| | - S Park
- Department of Family Medicine, Seobuk Hospital Seoul Metropolitan Government, South Korea
| | - H Y Kim
- Department of Internal Medicine, Wonju Severance Christian Hospital, South Korea
| | - J K Choi
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Bucheon St. Mary's Hospital, South Korea
| | - Y-M Wi
- Department of Internal Medicine, Samsung Changwon Hospital, South Korea
| | - H J Choi
- Department of Internal Medicine, Division of Infectious Diseases, Ewha Womans University School of Medicine, South Korea.
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Choi WS, Patel D, Han JH. Effects of pH and Salts on Physical and Mechanical Properties of Pea Starch Films. J Food Sci 2016; 81:E1716-25. [PMID: 27243801 DOI: 10.1111/1750-3841.13342] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Revised: 04/16/2016] [Accepted: 04/20/2016] [Indexed: 12/16/2023]
Abstract
To identify the significant contribution of intermolecular hydrogen bonds of starch molecules to the film structure formation, pH of film-forming solutions was adjusted and also various salts (NaCl, CaCl2 , CaSO4 , and K2 SO4 ) were mixed into the glycerol-plasticized pea starch film. The film made from pH 7 possessed the highest tensile strength-at-break (2 times) and elastic modulus (4 to 15 times) and the lowest elongation-at-break compared with those of the films made from acid and alkali environments. The pH 7 film also has the highest film density and the lowest total soluble matter. At the level of 0.01 to 0.1 M of CaSO4 and 0.1 M of K2 SO4 in a kilogram of starch, the water solubility of the film increased, while chloride salts slightly lowered the solubility. NaCl and CaSO4 reduced water vapor permeability (WVP), while CaCl2 slightly increased WVP at 0.01 and 0.06 M concentrations, and K2 SO4 significantly increased WVP at 0.03 and 0.15 M. Presence of salts increased tensile strength (5 to 14 times than the control films) and elastic modulus (35 to 180 times) of starch film at 0.01 to 0.03 M of CaSO4 and K2 SO4 . Elongation-at-break increased significantly as salt concentration increases to an optimal level. However, when the concentration exceeded above the optimal level, the E of starch films decreased and showed no significant difference from the control film. Overall, the addition of salts modified physical and mechanical properties of pea starch films more than pH adjustment without any salt addition.
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Affiliation(s)
- W S Choi
- Dept. of Food Science & Technology, Korea National Univ. of Transportation, 61 Daehak-ro, Jeungpyeong-gun, Chungbuk, 368-701, S. Korea
| | - D Patel
- Dept. of Food Science, Univ. of Manitoba, Winnipeg, MB, R3T 2N2, Canada
| | - J H Han
- Dept. of Food Science and Human Nutrition, Univ. of Illinois at Urbana/Champaign, Urbana, Ill., 61801, U.S.A
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Jung YH, Jang JH, Kang H, Choi WS, Choi YK, Song WC, Song BS, Lee JH, Hong B. Properties of Dye-Sensitized Solar Cells Using Carbon Nanowall Counter Electrodes. J Nanosci Nanotechnol 2016; 16:5302-5304. [PMID: 27483920 DOI: 10.1166/jnn.2016.12215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This research investigates plasma-treated and metal-coated carbon nanowalls (CNWs) for use as counter electrodes of dye-sensitized solar cells (DSSCs). The CNWs were synthesized on a fluorine-tin-oxide (FTO) glass substrate using the microwave plasma-enhanced chemical vapor deposition (PECVD) system with methane (CH4) gas. The post-plasma treatment was performed on the CNWs with hydrogen (H2) plasma using PECVD, and the CNWs were sputter-coated with metal films using the RF magnetron sputtering system with a four-inch tungsten (W) target. Then the post-plasma-treated and metal-coated CNWs were used as counter electrodes for the fabrication of the DSSCs. Field-emission scanning electron microscopy (FE-SEM) was performed to obtain cross-sectional and planar images of the grown CNWs. The energy conversion efficiencies of the DSSCs manufactured using the post-plasma-treated and metal-layer-coated CNWs as the counter electrodes were measured.
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41
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Joung YH, Kang FS, Lee S, Kang H, Choi WS, Choi YK, Song BS, Lee J, Hong B. Reaction Gas Ratio Effect on the Growth of a Diamond Film Using Microwave Plasma-Enhanced Chemical Vapor Deposition. J Nanosci Nanotechnol 2016; 16:5295-5297. [PMID: 27483918 DOI: 10.1166/jnn.2016.12212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this study, diamond films were prepared using the microwave plasma-enhanced chemical vapor deposition (PECVD) system, which included a DC bias system to enhance the nucleation of the films. The films were synthesized on Si wafers with different ratios of methane (CH4) and hydrogen (H2) gases. We have studied the effects of the CH4-to-H2 ratio on the structural and optical properties of diamond films. The thickness and surface profile of the films were characterized via field emission scanning electron microscopy (FE-SEM). Raman was used to investigate the structural properties of the diamond films. The refractive indexes as functions of the CH4-to-H2 ratio were measured using an ellipsometer. The FE-SEM analysis showed that the 3 and 5 sccm CH4 created diamond films. The Raman analysis indicated that a nanocrystalline diamond film was formed at 3 sccm; a general diamond film, at 5 sccm; and films similar to the a-C:H film, at 7 sccm. The ellipsometer measurement showed that the refractive index of the synthesized diamond film was around 2.42 at 3 sccm. This value decreased as the CH4 volume increased.
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Oh B, Choi WS, Park SB, Cho B, Yang YJ, Lee ES, Lee JH. Efficacy and safety of ursodeoxycholic acid composite on fatigued patients with elevated liver function and/or fatty liver: a multi-centre, randomised, double-blinded, placebo-controlled trial. Int J Clin Pract 2016; 70:302-11. [PMID: 26997458 PMCID: PMC5071730 DOI: 10.1111/ijcp.12790] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
AIM The aim of this study was to assess the effects of ursodeoxycholic acid composite (URSA-S) on fatigue in patients with elevated liver function tests and/or fatty liver disease. METHODS In this multi-centre randomised double-blinded placebo-controlled trial, 168 adults who were diagnosed with fatigue based on our criteria and had elevated liver function tests (but not > 5 times the normal level) and/or fatty liver on ultrasonography, were randomised to either the placebo or URSA-S administration group. The rate of improvement of checklist individual strength (CIS) using a cut-off of 76 points at the end of the study (8 weeks), the change in fatigue scale [CIS score and visual analogue scale (VAS)] were evaluated. The adverse effects of URSA-S were also recorded. RESULTS The rate of CIS improvement at the end-point was 79.76% and 45.68% in the therapy and placebo groups, respectively (p < 0.05). The fatigue recovery rate of the CIS score and VAS were higher in the therapy (-25.44 ± 18.57, -27.84 ± 2.70) than in the placebo group (-16.59 ± 17.29, -19.46 ± 2.81) (p < 0.05). The difference in fatigue recovery rate between the therapy and placebo groups was significant after 8 weeks. When analysed separately in patients with abnormal liver function tests and fatty liver disease, the fatigue recovery rate of the CIS score and VAS at 8 weeks was higher in the therapy than in the placebo group (p < 0.05). The frequency of adverse events in the therapy group was not significantly higher than that in the placebo group. CONCLUSION URSA-S is effective for alleviating fatigue in patients with liver dysfunction and/or fatty liver. The adverse effects of URSA-S are not significant. This study is registered at https://clinicaltrials.gov/ct2/show/NCT02415777.
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Affiliation(s)
- B Oh
- Department of Family Medicine, SMG-SNU Boramae Hospital, School of Medicine, Seoul National University, Seoul, Korea
| | - W S Choi
- Department of Family Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - S B Park
- Department of Family Practice and Community Health, Ajou University Hospital, School of Medicine, Ajou University, Suwon, Korea
| | - B Cho
- Department of Family Medicine, Seoul National University Hospital, School of Medicine, Seoul National University, Seoul, Korea
| | - Y J Yang
- Department of Health Promotion Center, Ilsan Paik Hospital, School of Medicine, Inje University, Goyang, Korea
| | - E S Lee
- Department of Health Promotion Center, Ilsan Paik Hospital, School of Medicine, Inje University, Goyang, Korea
| | - J H Lee
- Department of Health Promotion Center, Ilsan Paik Hospital, School of Medicine, Inje University, Goyang, Korea
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Yoon MS, Won KJ, Kim DY, Hwang DI, Yoon SW, Jung SH, Lee KP, Jung D, Choi WS, Kim B, Lee HM. Diminished Lipid Raft SNAP23 Increases Blood Pressure by Inhibiting the Membrane Fluidity of Vascular Smooth-Muscle Cells. J Vasc Res 2016; 52:321-33. [PMID: 26930561 DOI: 10.1159/000443888] [Citation(s) in RCA: 4] [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: 10/02/2015] [Accepted: 01/10/2016] [Indexed: 11/19/2022] Open
Abstract
Synaptosomal-associated protein 23 (SNAP23) is involved in microvesicle trafficking and exocytosis in various cell types, but its functional role in blood pressure (BP) regulation has not yet been defined. Here, we found that lipid raft SNAP23 expression was much lower in vascular smooth-muscle cells (VSMCs) from spontaneously hypertensive rats (SHR) than in those from normotensive Wistar-Kyoto (WKY) rats. This led us to investigate the hypothesis that this lower expression may be linked to the spontaneous hypertension found in SHR. The expression level of lipid raft SNAP23 and the fluidity in the plasma membrane of VSMCs were lower in SHR than in WKY rats. Cholesterol content in the VSMC membrane was higher, but the secreted cholesterols found in VSMC-conditioned medium and in the blood serum were lower in SHR than in WKY rats. SNAP23 knockdown in WKY rat VSMCs reduced the membrane fluidity and increased the membrane cholesterol level. Systemic overexpression of SNAP23 in SHR resulted in an increase of cholesterol content in their serum, a decrease in cholesterol in their aorta and the reduction of their BP. Our findings suggest that the low expression of the lipid raft SNAP23 in VSMCs might be a potential cause for the characteristic hypertension of SHR.
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Affiliation(s)
- Mi So Yoon
- Department of Cosmetic Science, College of Life and Health Sciences, Hoseo University, Asan, Korea
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Zhao J, Hwang KH, Choi WS, Shin SJ, Lee JK. Biological Behavior of Osteoblast Cell and Apatite Forming Ability of the Surface Modified Ti Alloys. J Nanosci Nanotechnol 2016; 16:1541-1544. [PMID: 27433617 DOI: 10.1166/jnn.2016.11909] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Titanium as one kind of biomaterials comes in direct contact with the body, making evaluation of biocompatibility an important aspect to biomaterials development. Surface chemistry of titanium plays an important role in osseointegration. Different surface modification alters the surface chemistry and result in different biological response. In this study, three kinds of mixed acid solutions were used to treat Ti specimens to induce Ca-P formation. Following a strong mixed acid activation process, Ca-P coating successfully formed on the Ti surfaces in simulated body fluid. Strong mixed acid increased the roughness of the metal surface, because the porous and rough surface allows better adhesion between Ca-P coatings and substrates. After modification of titanium surface by mixed acidic solution and subsequently H2O2/HCL treatment evaluation of biocompatibility was conducted from hydroxyapatite formation by biomimetic process and cell viability on modified titanium surface. Nano-scale modification of titanium surfaces can alter cellular and tissue responses, which may benefit osseointegration and dental implant therapy. Results from this study indicated that surface treatment methods affect the surface morphology, type of TiO2 layer formed and subsequent apatite deposition and biological responses. The thermo scientific alamarblue cell viability assay reagent is used to quantitatively measure the viability of mammalian cell lines, bacteria and fungi by incorporating a rapid, sensitive and reliable fluorometric/colorimetric growth indicator, without any toxic and side effect to cell line. In addition, mixed acid treatment uses a lower temperature and shorter time period than widely used alkali treatment.
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Koh M, Yong HY, Kim ES, Son H, Jeon YR, Hwang JS, Kim MO, Cha Y, Choi WS, Noh DY, Lee KM, Kim KB, Lee JS, Kim HJ, Kim H, Kim HH, Kim EJ, Park SY, Kim HS, Moon WK, Choi Kim HR, Moon A. A novel role for flotillin-1 in H-Ras-regulated breast cancer aggressiveness. Int J Cancer 2015; 138:1232-45. [PMID: 26413934 DOI: 10.1002/ijc.29869] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [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: 04/28/2015] [Revised: 09/08/2015] [Accepted: 09/14/2015] [Indexed: 01/03/2023]
Abstract
Elevated expression and aberrant activation of Ras have been implicated in breast cancer aggressiveness. H-Ras, but not N-Ras, induces breast cell invasion. A crucial link between lipid rafts and H-Ras function has been suggested. This study sought to identify the lipid raft protein(s) responsible for H-Ras-induced tumorigenicity and invasiveness of breast cancer. We conducted a comparative proteomic analysis of lipid raft proteins from invasive MCF10A human breast epithelial cells engineered to express active H-Ras and non-invasive cells expressing active N-Ras. Here, we identified a lipid raft protein flotillin-1 as an important regulator of H-Ras activation and breast cell invasion. Flotillin-1 was required for epidermal growth factor-induced activation of H-Ras, but not that of N-Ras, in MDA-MB-231 triple-negative breast cancer (TNBC) cells. Flotillin-1 knockdown inhibited the invasiveness of MDA-MB-231 and Hs578T TNBC cells in vitro and in vivo. In xenograft mouse tumor models of these TNBC cell lines, we showed that flotillin-1 played a critical role in tumor growth. Using human breast cancer samples, we provided clinical evidence for the metastatic potential of flotillin-1. Membrane staining of flotillin-1 was positively correlated with metastatic spread (p = 0.013) and inversely correlated with patient disease-free survival rates (p = 0.005). Expression of flotillin-1 was associated with H-Ras in breast cancer, especially in TNBC (p < 0.001). Our findings provide insight into the molecular basis of Ras isoform-specific interplay with flotillin-1, leading to tumorigenicity and aggressiveness of breast cancer.
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Affiliation(s)
- Minsoo Koh
- College of Pharmacy, Duksung Women's University, Seoul, Korea
| | - Hae-Young Yong
- College of Pharmacy, Duksung Women's University, Seoul, Korea
| | - Eun-Sook Kim
- College of Pharmacy, Duksung Women's University, Seoul, Korea
| | - Hwajin Son
- College of Pharmacy, Duksung Women's University, Seoul, Korea
| | - You Rim Jeon
- College of Pharmacy, Duksung Women's University, Seoul, Korea
| | - Jin-Sun Hwang
- College of Pharmacy, Duksung Women's University, Seoul, Korea
| | - Myeong-Ok Kim
- College of Pharmacy, Duksung Women's University, Seoul, Korea
| | - Yujin Cha
- College of Pharmacy, Duksung Women's University, Seoul, Korea
| | - Wahn Soo Choi
- Department of Immunology, School of Medicine, Konkuk University, Chungju, Korea
| | - Dong-Young Noh
- Department of Surgery and Cancer Research Institute, College of Medicine, Seoul National University, Seoul, Korea
| | - Kyung-Min Lee
- Department of Surgery and Cancer Research Institute, College of Medicine, Seoul National University, Seoul, Korea
| | - Ki-Bum Kim
- Department of Molecular Medicine, College of Medicine, Inha University, Incheon, Korea
| | - Jae-Seon Lee
- Department of Molecular Medicine, College of Medicine, Inha University, Incheon, Korea
| | - Hyung Joon Kim
- Department of Oral Physiology, School of Dentistry, Pusan National University, Yangsan, Korea
| | - Haemin Kim
- Department of Cell and Developmental Biology, BK21 Program and Dental Research Institute, Seoul National University, Seoul, Korea
| | - Hong-Hee Kim
- Department of Cell and Developmental Biology, BK21 Program and Dental Research Institute, Seoul National University, Seoul, Korea
| | - Eun Joo Kim
- Department of Pathology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - So Yeon Park
- Department of Pathology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Hoe Suk Kim
- Department of Radiology, Seoul National University Hospital, Seoul, Korea
| | - Woo Kyung Moon
- Department of Radiology, Seoul National University Hospital, Seoul, Korea
| | - Hyeong-Reh Choi Kim
- Department of Pathology, Wayne State University School of Medicine, Detroit, MI
| | - Aree Moon
- College of Pharmacy, Duksung Women's University, Seoul, Korea
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Kim HS, Lee JH, Han HD, Kim AR, Nam ST, Kim HW, Park YH, Lee D, Lee MB, Park YM, Kim HS, Kim YM, You JC, Choi WS. Autocrine stimulation of IL-10 is critical to the enrichment of IL-10-producing CD40(hi)CD5(+) regulatory B cells in vitro and in vivo. BMB Rep 2015; 48:54-9. [PMID: 25341924 PMCID: PMC4345643 DOI: 10.5483/bmbrep.2015.48.1.213] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 10/23/2014] [Accepted: 10/23/2014] [Indexed: 12/21/2022] Open
Abstract
IL-10-producing B (Breg) cells regulate various immune responses. However, their phenotype remains unclear. CD40 expression was significantly increased in B cells by LPS, and the Breg cells were also enriched in CD40hiCD5+ B cells. Furthermore, CD40 expression on Breg cells was increased by IL-10, CD40 ligand, and B cell-activating factor, suggesting that CD40hi is a common phenotype of Breg cells. LPS-induced CD40 expression was largely suppressed by an anti-IL-10 receptor antibody and in IL-10−/−CD5+CD19+ B cells. The autocrine effect of IL-10 on the CD40 expression was largely suppressed by an inhibitor of JAK/STAT3. In vivo, the LPS treatment increased the population of CD40hiCD5+ Breg cells in mice. However, the population of CD40hiCD5+ B cells was minimal in IL-10−/− mice by LPS. Altogether, our findings show that Breg cells are largely enriched in CD40hiCD5+ B cells and the autocrine effect of IL-10 is critical to the formation of CD40hiCD5+ Breg cells. [BMB Reports 2015; 48(1): 54-59]
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Affiliation(s)
- Hyuk Soon Kim
- School of Medicine, Konkuk University, Chungju 380-701, Korea
| | - Jun Ho Lee
- College of Medicine, Korea University, Seoul 136-701, Korea
| | - Hee Dong Han
- School of Medicine, Konkuk University, Chungju 380-701, Korea
| | - A-Ram Kim
- School of Medicine, Konkuk University, Chungju 380-701, Korea
| | - Seung Taek Nam
- School of Medicine, Konkuk University, Chungju 380-701, Korea
| | - Hyun Woo Kim
- School of Medicine, Konkuk University, Chungju 380-701, Korea
| | - Young Hwan Park
- School of Medicine, Konkuk University, Chungju 380-701, Korea
| | - Dajeong Lee
- School of Medicine, Konkuk University, Chungju 380-701, Korea
| | - Min Bum Lee
- School of Medicine, Konkuk University, Chungju 380-701, Korea
| | - Yeong Min Park
- School of Medicine, Konkuk University, Chungju 380-701, Korea
| | - Hyung Sik Kim
- College of Pharmacy, Sungkyunkwan University, Suwon 440-746, Korea
| | - Young Mi Kim
- College of Pharmacy, Duksung Women's University, Seoul 132-714, Korea
| | - Ji Chang You
- National Research Laboratory of Molecular Virology, Department of Pathology, School of Medicine, The Catholic University of Korea, Seoul 137-701, Korea
| | - Wahn Soo Choi
- School of Medicine, Konkuk University, Chungju 380-701, Korea
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Lee JH, Kim TH, Kim HS, Kim AR, Kim DK, Nam ST, Kim HW, Park YH, Her E, Park YM, Kim HS, Kim YM, Choi WS. An indoxyl compound 5-bromo-4-chloro-3-indolyl 1,3-diacetate, CAC-0982, suppresses activation of Fyn kinase in mast cells and IgE-mediated allergic responses in mice. Toxicol Appl Pharmacol 2015; 285:179-86. [PMID: 25902337 DOI: 10.1016/j.taap.2015.04.009] [Citation(s) in RCA: 6] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 01/16/2015] [Accepted: 04/01/2015] [Indexed: 11/17/2022]
Abstract
Mast cells, constituents of virtually all organs and tissues, are critical cells in IgE-mediated allergic responses. The aim of this study was to investigate the effect and mechanism of an indoxyl chromogenic compound, 5-bromo-4-chloro-3-indolyl 1,3-diacetate, CAC-0982, on IgE-mediated mast cell activation and allergic responses in mice. CAC-0982 reversibly suppressed antigen-stimulated degranulation in murine mast cells (IC50, ~3.8μM) and human mast cells (IC50, ~3.0μM). CAC-0982 also inhibited the expression and secretion of IL-4 and TNF-α in mast cells. Furthermore, CAC-0982 suppressed the mast cell-mediated allergic responses in mice in a dose-dependent manner (ED50 27.9mg/kg). As for the mechanism, CAC-0982 largely suppressed the phosphorylation of Syk and its downstream signaling molecules, including LAT, Akt, Erk1/2, p38, and JNK. Notably, the tyrosine kinase assay of antigen-stimulated mast cells showed that CAC-0982 inhibited Fyn kinase, one of the upstream tyrosine kinases for Syk activation in mast cells. Taken together, these results suggest that CAC-0982 may be used as a new treatment for regulating IgE-mediated allergic diseases through the inhibition of the Fyn/Syk pathway in mast cells.
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Affiliation(s)
- Jun Ho Lee
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea; College of Medicine, Korea University, Seoul 136-701, Republic of Korea
| | - Tae Hyung Kim
- College of Pharmacy, Sungkyunkwan University, Suwon 440-746, Republic of Korea
| | - Hyuk Soon Kim
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - A-Ram Kim
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - Do-Kyun Kim
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea; Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Seung Taek Nam
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - Hyun Woo Kim
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - Young Hwan Park
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - Erk Her
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - Yeong Min Park
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - Hyung Sik Kim
- College of Pharmacy, Sungkyunkwan University, Suwon 440-746, Republic of Korea
| | - Young Mi Kim
- College of Pharmacy, Duksung Women's University, Seoul 132-714, Republic of Korea
| | - Wahn Soo Choi
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea.
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Kim JH, Kim AR, Kim HS, Kim HW, Park YH, You JS, Park YM, Her E, Kim HS, Kim YM, Choi WS. Rhamnus davurica leaf extract inhibits Fyn activation by antigen in mast cells for anti-allergic activity. BMC Complement Altern Med 2015; 15:80. [PMID: 25887889 PMCID: PMC4379541 DOI: 10.1186/s12906-015-0607-6] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Accepted: 03/12/2015] [Indexed: 01/06/2023]
Abstract
BACKGROUND Complementary and alternative herbal medicines are recently considered as a promising approach for treating various diseases. We screened approximately 100 plant extracts for anti-allergic activity. Rhamnus davurica leaf extract showed the most potent inhibitory effect on the activation of RBL-2H3 mast cells. Although Rhamnus davurica extract has been used to treat pruritus, dysuresia, and constipation as a traditional herbal medicine in some Asian countries, an anti-allergic effect of Rhamnus davurica has not yet been demonstrated. We aimed to investigate the effect and mechanism of the leaf extract of Rhamnus davurica (LERD) on mast cells in vitro and allergic responses in vivo. METHODS The effects of LERD on the activation of mast cells and mast cell-mediated passive cutaneous anaphylaxis (PCA) were measured in mice and two types of mast cells, mouse bone marrow-derived mast cells (BMMCs) and RBL-2H3 cells in vitro. A mechanistic study of its inhibitory effect was performed by using degranulation assay, reverse transcriptase-polymerase chain reaction, enzyme-linked immunosorbent assay, and western blotting analysis. RESULTS LERD reversibly suppressed antigen-stimulated degranulation in BMMCs and RBL-2H3 cells, and also inhibited mRNA expression and secretion of TNF-α and IL-4 in a dose-dependent manner. In a PCA animal model, LERD significantly inhibited antigen-induced allergic response and degranulation of ear tissue mast cells. As for the mechanism of action, LERD inhibited the activation of Syk, which is the pivotal signaling protein for mast cell activation by antigen. Furthermore, LERD also impeded the activations of well-known downstream proteins such as LAT, Akt and three MAP kinases (Erk, p38 and JNK). In an in vitro kinase assay, LERD suppressed the activation of Fyn in antigen-stimulated mast cells. CONCLUSION This study demonstrated for the first time that LERD has anti-allergic effects through inhibiting the Fyn/Syk pathway in mast cells. Therefore, this study provides scientific evidence for LERD to be used as an herbal medicine or health food for patients with allergic diseases.
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Affiliation(s)
- Ji Hyung Kim
- KU open Innovation Center, School of Medicine, Konkuk University, Chungju, 380-701, Korea.
| | - A-Ram Kim
- KU open Innovation Center, School of Medicine, Konkuk University, Chungju, 380-701, Korea.
| | - Hyuk Soon Kim
- KU open Innovation Center, School of Medicine, Konkuk University, Chungju, 380-701, Korea.
| | - Hyun Woo Kim
- KU open Innovation Center, School of Medicine, Konkuk University, Chungju, 380-701, Korea.
| | - Young Hwan Park
- KU open Innovation Center, School of Medicine, Konkuk University, Chungju, 380-701, Korea.
| | - Jueng Soo You
- KU open Innovation Center, School of Medicine, Konkuk University, Chungju, 380-701, Korea.
| | - Yeong Min Park
- KU open Innovation Center, School of Medicine, Konkuk University, Chungju, 380-701, Korea.
| | - Erk Her
- KU open Innovation Center, School of Medicine, Konkuk University, Chungju, 380-701, Korea.
| | - Hyung Sik Kim
- College of Pharmacy, Sungkyunkwan University, Suwon, 440-746, Korea.
| | - Young Mi Kim
- College of Pharmacy, Duksung Women's University, Seoul, 132-714, Korea.
| | - Wahn Soo Choi
- KU open Innovation Center, School of Medicine, Konkuk University, Chungju, 380-701, Korea.
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Kim HS, Kim AR, Kim DK, Kim HW, Park YH, Jang GH, Kim B, Park YM, You JS, Kim HS, Beaven MA, Kim YM, Choi WS. Interleukin-10–producing CD5+B cells inhibit mast cells during immunoglobulin E–mediated allergic responses. Sci Signal 2015; 8:ra28. [DOI: 10.1126/scisignal.2005861] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Kim TH, Kim HS, Kang YJ, Yoon S, Lee J, Choi WS, Jung JH, Kim HS. Psammaplin A induces Sirtuin 1-dependent autophagic cell death in doxorubicin-resistant MCF-7/adr human breast cancer cells and xenografts. Biochim Biophys Acta Gen Subj 2015; 1850:401-10. [DOI: 10.1016/j.bbagen.2014.11.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 10/16/2014] [Accepted: 11/06/2014] [Indexed: 11/26/2022]
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