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Ma H, Shi JM, Rong H, Tong XP. Cu(II) coordination polymer: synergy effect with 70 pearl flavor pill on local brain injury by inhibiting the inflammatory signaling pathway. INORG NANO-MET CHEM 2021. [DOI: 10.1080/24701556.2021.1952244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Hui Ma
- School of Medicine, Xizang Minzu University, Xianyang, Shaanxi, China
| | - Jing-Ming Shi
- Key Laboratory of High Altitude Environment and Genes Related to Diseases of Tibet Autonomous Region, School of Medicine, Xizang Minzu University, Xianyang, Shaanxi, China
| | - Hao Rong
- Key Laboratory of High Altitude Environment and Genes Related to Diseases of Tibet Autonomous Region, School of Medicine, Xizang Minzu University, Xianyang, Shaanxi, China
| | - Xiao-Peng Tong
- Key Laboratory of High Altitude Environment and Genes Related to Diseases of Tibet Autonomous Region, School of Medicine, Xizang Minzu University, Xianyang, Shaanxi, China
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Dong L, Watanabe K, Itoh M, Huan CR, Tong XP, Nakamura T, Miki M, Iwao H, Nakajima A, Sakai T, Kawanami T, Sawaki T, Masaki Y, Fukushima T, Fujita Y, Tanaka M, Yano M, Okazaki T, Umehara H. CD4+ T-cell dysfunctions through the impaired lipid rafts ameliorate concanavalin A-induced hepatitis in sphingomyelin synthase 1-knockout mice. Int Immunol 2012; 24:327-37. [PMID: 22345277 DOI: 10.1093/intimm/dxs008] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Membrane microdomains consisting of sphingomyelin (SM) and cholesterol appear to be important for signal transduction in T-cell activation. The present study was designed to elucidate the role of membrane SM in vivo and in vitro using sphingomyelin synthase 1 (SMS1) knock out (SMS1(-/-)) mice and Concanavalin A (ConA)-induced hepatitis. After establishing SMS1(-/-) mice, we investigated CD4+ T-cell functions including proliferation, cytokine production and signal transduction in vivo. We also examined severity of hepatitis, cytokine production in serum and liver after ConA injection at a dose of 20 mg kg(-1). CD4+ T cells from SMS1(-/-) mice showed severe deficiency of membrane SM and several profound defects compared with wild-type controls as follows: (i) cellular proliferation and production of IL-2 and IFN-γ by co-cross-linking of CD3 and CD4; (ii) tyrosine phosphorylation of LAT and its association with ZAP-70; (iii) clustering and co-localization of TCR with lipid rafts. Consistent with these impaired CD4+ T-cell functions in vitro, SMS1(-/-) mice showed decreased serum levels of IL-6 and IFN-γ by ConA injection, which renders SMS1(-/-) mice less sensitive to ConA-induced hepatitis. These results indicated that the deficiency of membrane SM caused the CD4+ T-cell dysfunction through impaired lipid raft function contributed to protection of ConA-induced liver injury, suggesting that the membrane SM is critical for full T-cell activation both in vitro and in vivo.
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Affiliation(s)
- Lingli Dong
- Department of Hematology and Immunology, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan
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Cao Y, Jin ZX, Tong XP, Yue S, Sakai T, Kawanami T, Sawaki T, Miki M, Iwao H, Nakajima A, Masaki Y, Fukushima Y, Fujita Y, Nakajima H, Okazaki T, Umehara H. Synergistic effects of topoisomerase I inhibitor, SN38, on Fas-mediated apoptosis. Anticancer Res 2010; 30:3911-3917. [PMID: 21036702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Inhibitors of topoisomerase I, such as camptothecin, have proven to be among the most promising new classes of anti-neoplastic agents introduced into the clinical setting in recent years. Irinotecan (CPT-11) is one of the most widely used camptothecin analogs and is converted to form the active metabolite SN-38. The present study was designed to explore apoptosis induced by SN38 and anti-Fas antibody (CH11) in WR/Fas-SMS1 cells and its possible mechanisms. The results demonstrate that combination of SN38 and CH11 synergistically enhanced cell apoptosis in WR/Fas-SMS1 cells. Western blotting analysis showed that combination of SN38 and CH11 activated the ATM-Chk1-p53 pathway, increased protein expression of phospho-p53 and cleavaged caspase-3, but down-regulated expression of phospho-p21. Our data suggest that combination of SN38 and CH11 enhanced apoptosis through down-regulation of p21 phosphorylation. In conclusion, inhibition of p21 could be a new adjuvant approach in cancer therapy.
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Affiliation(s)
- Yan Cao
- Department of Hematology and Immunology, Kanazawa Medical University, Kahoku-gun, Ishikawa, Japan
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Tanaka M, Murakami K, Ozaki S, Imura Y, Tong XP, Watanabe T, Sawaki T, Kawanami T, Kawabata D, Fujii T, Usui T, Masaki Y, Fukushima T, Jin ZX, Umehara H, Mimori T. DIP2 disco-interacting protein 2 homolog A (Drosophila) is a candidate receptor for follistatin-related protein/follistatin-like 1--analysis of their binding with TGF-β superfamily proteins. FEBS J 2010; 277:4278-89. [PMID: 20860622 DOI: 10.1111/j.1742-4658.2010.07816.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Follistatin-related protein (FRP)/follistatin-like 1 (FSTL1) is a member of the follistatin protein family, all of which share a characteristic structure unit found in follistatin, called the FS domain. Developmental studies have suggested that FRP regulates organ tissue formation in embryos. Immunological studies showed that FRP modifies joint inflammation in arthritic disease, and modulates allograft tolerance. However, the principle physiological function of FRP is currently unknown. To address this issue, we cloned four FRP-associated proteins using a two-hybrid cloning method: disco-interacting protein 2 homolog A from Drosophila (DIP2A), CD14, glypican 1 and titin. Only DIP2A was expected to be a membrane receptor protein with intracellular regions. Over-expression of FLAG epitope-tagged DIP2A augmented the suppressive effect of FRP on FBJ murine osteosarcoma viral oncogene homolog (FOS) expression, and the Fab fragment of IgG to FLAG blocked this effect. Knockdown of Dip2a leaded to Fos gene up-regulation, and this was not affected by exogenous FRP. These in vitro experiments confirmed that DIP2A could be a cell-surface receptor protein and mediate a FOS down-regulation signal of FRP. Moreover, molecular interaction analyses using Biacore demonstrated that FRP bound to DIP2A and CD14, and also with proteins of the TGF-β superfamily, i.e. activin, TGF-β, bone morphogenetic protein 2/4 (BMP-2/4), their receptors and follistatin. FRP binding to DIP2A was blocked by CD14, follistatin, activin and BMP-2. FRP blocked the ligand-receptor binding of activin and BMP-2, but integrated itself with that of BMP-4. This multi-specific binding may reflect the broad physiological activity of FRP.
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Affiliation(s)
- Masao Tanaka
- Division of Hematology and Immunology, Department of Internal Medicine, Kanazawa Medical University, Ishikawa, Japan.
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Huang CR, Jin ZX, Dong L, Tong XP, Yue S, Kawanami T, Sawaki T, Sakai T, Miki M, Iwao H, Nakajima A, Masaki Y, Fukushima Y, Tanaka M, Fujita Y, Nakajima H, Okazaki T, Umehara H. Cisplatin augments FAS-mediated apoptosis through lipid rafts. Anticancer Res 2010; 30:2065-2071. [PMID: 20651352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Cisplatin is widely and effectively used for the treatment of various types of cancer. However, its biochemical mechanisms are still unelucidated. Previously, we reported that membrane sphingomyelin (SM) was important for FAS-mediated apoptosis through lipid raft function. In this study, we strikingly show that cisplatin combined with CH11 (anti-FAS antibody, IgM) was able to induce marked apoptosis in SM synthase-restored WR/Fas-SMS1 cells, but not in SM synthase-deficient WR/FAS-SM(-) cells. In addition, we demonstrated that membrane SM played an important role in cisplatin/CH11-induced apoptosis through the classical caspase-dependent pathway, mainly by enhancing the formation of FAS-associated signaling complexes.
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Affiliation(s)
- Cheng-Ri Huang
- Department of Hematology and Immunology, Kanazawa Medical University, 1-1 Daigaku, Uchinada-machi, Kahoku-gun, Ishikawa 920-0293, Japan
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Jin ZX, Huang CR, Dong L, Goda S, Kawanami T, Sawaki T, Sakai T, Tong XP, Masaki Y, Fukushima T, Tanaka M, Mimori T, Tojo H, Bloom ET, Okazaki T, Umehara H. Impaired TCR signaling through dysfunction of lipid rafts in sphingomyelin synthase 1 (SMS1)-knockdown T cells. Int Immunol 2008; 20:1427-37. [PMID: 18820264 DOI: 10.1093/intimm/dxn100] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
During T cell activation, TCRs cluster at the center of the T cell-antigen-presenting cell interface forming the central supramolecular activation cluster. Although it has been suggested that sphingolipid- and cholesterol-rich microdomains, termed lipid rafts, form platforms for the regulation and transduction of TCR signals, an actual role for membrane sphingomyelin (SM), a key component of lipid rafts, has not been reported. After cloning a gene responsible for SM synthesis, sphingomyelin synthase (SMS) 1, we established a SM-knockdown cell line (Jurkat-SMS1/kd) by transfection of SMS1-short-interfering RNA into Jurkat T cells, which is deficient in membrane expression of SM. Upon CD3 stimulation, expression of CD69 (the earliest leukocyte activation antigen), activation-induced cell adhesion and proliferation as well as TCR clustering was severely impaired in Jurkat-SMS1/kd cells. CD3-induced tyrosine phosphorylation and association of linker for activation of T cell with ZAP-70 and Grb2 and phosphorylation of protein kinase C (PKC) were also severely impaired in Jurkat-SMS1/kd cells. Finally, translocation of TCR, ZAP-70 and PKC into lipid rafts was markedly decreased in Jurkat-SMS1/kd cells. These findings indicate that membrane SM is crucial for TCR signal transduction, leading to full T cell activation through lipid raft function.
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Affiliation(s)
- Zhe-Xiong Jin
- Department of Hematology and Immunology, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa 920-0293, Japan
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Dong L, Masaki Y, Takegami T, Kawanami T, Itoh K, Jin ZX, Huang CR, Tong XP, Fukushima T, Tanaka M, Sawaki T, Sakai T, Sugai S, Okazaki T, Hirose Y, Umehara H. Cloning and expression of two human recombinant monoclonal Fab fragments specific for EBV viral capsid antigen. Int Immunol 2007; 19:331-6. [PMID: 17272286 DOI: 10.1093/intimm/dxl150] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Serum titers of antibody to Epstein-Barr virus (EBV) viral capsid antigen (VCA) have been positively correlated with malignancies of lymphoid proliferation, such as Burkitt's lymphoma and Hodgkin's lymphoma. We have constructed a phage display combinatorial antibody Fab library from a patient with marginal zone B cell lymphoma associated with Sjögren's syndrome and carrying high serum anti-EBV-VCA IgG titer. Fab fragments were selected by panning against EBV-VCA protein coated onto ELISA plates, and selected Fab clones were characterized by ELISA, western blotting (WB), indirect immunofluorescence assay and immunohistochemistry. We have established two Fab clones, Fab-aVCA1 and Fab-aVCA21, which specifically recognize EBV-VCA by ELISA and WB. Inhibition ELISA competition showed that both clones could significantly reduce the binding of specific anti-EBV-VCA mAb to its relevant proteins. Furthermore, these two Fab clones could localize VCA protein in the EBV-positive P3HR1 and Daudi cell lines, as well as in tissue samples from patients with EBV-infected lymphoid malignancies. These results indicate that our two Fab clones are novel human mAbs specific for EBV-VCA protein and may have potential benefits for development of novel diagnostic and therapeutic approaches in EBV-related lymphoid malignancies.
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MESH Headings
- Amino Acid Sequence
- Antibodies, Monoclonal/biosynthesis
- Antibodies, Monoclonal/chemistry
- Antibodies, Monoclonal/genetics
- Antibodies, Viral/blood
- Antigens, Viral/immunology
- Blotting, Western
- Capsid Proteins/immunology
- Cell Line
- Cloning, Molecular
- Combinatorial Chemistry Techniques
- Enzyme-Linked Immunosorbent Assay
- Epstein-Barr Virus Infections/complications
- Epstein-Barr Virus Infections/immunology
- Fluorescent Antibody Technique, Indirect
- Humans
- Immunoglobulin Fab Fragments/biosynthesis
- Immunoglobulin Fab Fragments/chemistry
- Immunoglobulin Fab Fragments/genetics
- Immunohistochemistry
- In Situ Hybridization
- Lymphoma, B-Cell/etiology
- Lymphoma, B-Cell/immunology
- Lymphoma, B-Cell/virology
- Molecular Sequence Data
- Peptide Library
- Sequence Analysis, Protein
- Sjogren's Syndrome/complications
- Sjogren's Syndrome/immunology
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Affiliation(s)
- Lingli Dong
- Department of Hematology and Immunology, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan
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