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Hao F, Tao L, Liu J, Ma Y, Zhang J, Wang W, Yan W, Wang B, Wang X, Chen X, Ma Y, Fan H, Zhao X, Wang Z, Bai C. Cynanchum komarovii extract for the treatment of rheumatoid arthritis by acting on synovial cells in vitro and in vivo. JOURNAL OF ETHNOPHARMACOLOGY 2023; 317:116825. [PMID: 37348792 DOI: 10.1016/j.jep.2023.116825] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 06/17/2023] [Accepted: 06/19/2023] [Indexed: 06/24/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Cynanchum komarovii (CK), the northwest Chinese region's common medicinal herb, was traditionally utilized to treat arthritis, toothache, bald sores and cholecystitis. Various forms of arthritis can be treated with CK, based on "Medicinal Plants of Chinese Desert Areas". However, the exact mechanism of action in rheumatoid arthritis (RA) is uncertain. AIM OF THE STUDY To evaluate the in vitro and in vivo effects of CK extracts on RA and to preliminarily investigate its anti-RA mechanism of action. MATERIALS AND METHODS The main components of CK extract were analyzed by HPLC method. The effects of CK on the proliferation and apoptosis of human rheumatoid arthritis fibroblast-like synoviocytes (HFLS-RA) cells and the expression of apoptosis-related proteins in HFLS-RA cells were evaluated by CCK8 assay, flow cytometry and WB assay. To verify the anti-RA effect of CK extracts in vivo, a collagen-induced arthritis (CIA) rat model was established. The rats were divided into six groups: normal group, model group, CK high-dose group (1000 mg/kg, CK-H), CK medium-dose group (500 mg/kg, CK-M), CK low-dose group (250 mg/kg, CK-L) and methotrexate-positive drug group (MTX); the drug was administered continuously for 28 days. Body weight changes, joint swelling, arthritis index, bone density, ankle lesions, immune organ index, splenic lesions and inflammatory factor expression were used to evaluate the in vivo anti-RA activity of the extract. RESULTS The findings of in vitro experiments showed that 10% CK-containing serum decreased the expression level of Bcl-2, increased the expression levels of Bax and Cleaved Caspase-3 in synovial cells, and prevented TNF-α induced aberrant proliferation and apoptotic antagonism in HFLS-RA cells. According to in vivo studies, CK extract at doses above 250 mg/kg was effective in controlling the levels of inflammatory factors, lowering the arthritis index, and improving foot swelling in CIA rats. When administered at doses up to 1000 mg/kg, CK extract significantly improved synovial lesions, increased bone density, and decreased abnormally elevated immune organ index in CIA rats. CONCLUSIONS CK has significant anti-RA activity, and its anti-RA mechanism of action may be related to the regulation of the expression levels of apoptosis related proteins and the promotion of apoptosis in synovial cells.
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Affiliation(s)
- Fusheng Hao
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, China; Key Laboratory of Ningxia Ethnomedicine Modernization, Ministry of Education, Ningxia Medical University, Yinchuan, 750004, China
| | - Li Tao
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, China
| | - Junmei Liu
- Department of Pharmacy, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Yan Ma
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, China
| | - Jin Zhang
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, China
| | - Wen Wang
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, China
| | - Wei Yan
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, China
| | - Bo Wang
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, China
| | - Xiaofei Wang
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, China
| | - Xingyi Chen
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, China
| | - Yingying Ma
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, China
| | - Hongli Fan
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, China
| | - Xi Zhao
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, China
| | - Zhizhong Wang
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, China; Key Laboratory of Ningxia Ethnomedicine Modernization, Ministry of Education, Ningxia Medical University, Yinchuan, 750004, China.
| | - Changcai Bai
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, China; Key Laboratory of Ningxia Ethnomedicine Modernization, Ministry of Education, Ningxia Medical University, Yinchuan, 750004, China.
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Singh V, Kalliolias GD, Ostaszewski M, Veyssiere M, Pilalis E, Gawron P, Mazein A, Bonnet E, Petit-Teixeira E, Niarakis A. RA-map: building a state-of-the-art interactive knowledge base for rheumatoid arthritis. Database (Oxford) 2020; 2020:baaa017. [PMID: 32311035 PMCID: PMC7170216 DOI: 10.1093/database/baaa017] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Revised: 01/21/2020] [Accepted: 02/13/2020] [Indexed: 02/07/2023]
Abstract
Rheumatoid arthritis (RA) is a progressive, inflammatory autoimmune disease of unknown aetiology. The complex mechanism of aetiopathogenesis, progress and chronicity of the disease involves genetic, epigenetic and environmental factors. To understand the molecular mechanisms underlying disease phenotypes, one has to place implicated factors in their functional context. However, integration and organization of such data in a systematic manner remains a challenging task. Molecular maps are widely used in biology to provide a useful and intuitive way of depicting a variety of biological processes and disease mechanisms. Recent large-scale collaborative efforts such as the Disease Maps Project demonstrate the utility of such maps as versatile tools to organize and formalize disease-specific knowledge in a comprehensive way, both human and machine-readable. We present a systematic effort to construct a fully annotated, expert validated, state-of-the-art knowledge base for RA in the form of a molecular map. The RA map illustrates molecular and signalling pathways implicated in the disease. Signal transduction is depicted from receptors to the nucleus using the Systems Biology Graphical Notation (SBGN) standard representation. High-quality manual curation, use of only human-specific studies and focus on small-scale experiments aim to limit false positives in the map. The state-of-the-art molecular map for RA, using information from 353 peer-reviewed scientific publications, comprises 506 species, 446 reactions and 8 phenotypes. The species in the map are classified to 303 proteins, 61 complexes, 106 genes, 106 RNA entities, 2 ions and 7 simple molecules. The RA map is available online at ramap.elixir-luxembourg.org as an open-access knowledge base allowing for easy navigation and search of molecular pathways implicated in the disease. Furthermore, the RA map can serve as a template for omics data visualization.
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Affiliation(s)
- Vidisha Singh
- Laboratoire Européen de Recherche pour la Polyarthrite Rhumatoïde - Genhotel, Univ Evry, Université Paris-Saclay, 2, rue Gaston Crémieux, 91057 EVRY-GENOPOLE cedex, Evry, France
| | - George D Kalliolias
- Arthritis and Tissue Degeneration Program, Hospital for Special Surgery, 535 East 70th Street, New York, NY 10021, USA
- Weill Cornell Medical Center, Weill Department of Medicine, 525 East 68th Street, New York, NY 10065, USA
| | - Marek Ostaszewski
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 6 Avenue du Swing, L-4367 Belvaux, Luxembourg
| | - Maëva Veyssiere
- Laboratoire Européen de Recherche pour la Polyarthrite Rhumatoïde - Genhotel, Univ Evry, Université Paris-Saclay, 2, rue Gaston Crémieux, 91057 EVRY-GENOPOLE cedex, Evry, France
| | - Eleftherios Pilalis
- eNIOS Applications P.C., R&D department, Alexandrou Pantou 25, 17671, Kallithea-Athens, Greece
| | - Piotr Gawron
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 6 Avenue du Swing, L-4367 Belvaux, Luxembourg
| | - Alexander Mazein
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 6 Avenue du Swing, L-4367 Belvaux, Luxembourg
| | - Eric Bonnet
- Centre National de Recherche en Génomique Humaine (CNRGH), CEA, 2 rue Gaston Crémieux, CP5706 91057 EVRY-GENOPOLE cedex, Evry, France
| | - Elisabeth Petit-Teixeira
- Laboratoire Européen de Recherche pour la Polyarthrite Rhumatoïde - Genhotel, Univ Evry, Université Paris-Saclay, 2, rue Gaston Crémieux, 91057 EVRY-GENOPOLE cedex, Evry, France
| | - Anna Niarakis
- Laboratoire Européen de Recherche pour la Polyarthrite Rhumatoïde - Genhotel, Univ Evry, Université Paris-Saclay, 2, rue Gaston Crémieux, 91057 EVRY-GENOPOLE cedex, Evry, France
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Tarr JM, Winyard PG, Ryan B, Harries LW, Haigh R, Viner N, Eggleton P. Extracellular calreticulin is present in the joints of patients with rheumatoid arthritis and inhibits FasL (CD95L)-mediated apoptosis of T cells. ACTA ACUST UNITED AC 2010; 62:2919-29. [PMID: 20533543 DOI: 10.1002/art.27602] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
OBJECTIVE The binding of FasL (CD95L) to its receptor, Fas (CD95), induces apoptosis. Studies have shown that in patients with rheumatoid arthritis (RA), T lymphocytes are resistant to FasL-induced apoptosis in vivo but are susceptible to FasL-induced apoptosis in vitro. Dysfunction in this mechanism may be an important contributor to the pathophysiology of RA. Thus, the present study was undertaken to determine which factors might inhibit FasL-Fas binding in vivo and those that would inhibit apoptosis of T lymphocytes in an in vitro model system. METHODS Human Jurkat T cells rendered apoptotic by FasL exposure were analyzed by flow cytometry. Necrosis was determined according to measurement of lactate dehydrogenase release. Quantification of calreticulin in plasma and synovial fluid and of calreticulin-FasL binding was performed by enzyme-linked immunosorbent assay. Measurement of nitrite/nitrate in the plasma and synovial fluid was carried out by chemiluminescence assay. RESULTS Extracellular calreticulin was present at a significantly higher concentration in the plasma (median 10.3 ng/ml, interquartile range [IQR] 14.8 ng/ml) and synovial fluid (median 10.3 ng/ml, IQR 12.0 ng/ml) of RA patients (each P < 0.05) compared with the plasma (median 3.1 ng/ml, IQR 1.3 ng/ml) and synovial fluid (median 2.9 ng/ml, IQR 0.9 ng/ml) of patients with psoriatic arthritis and the plasma of healthy control subjects (median 2.9 ng/ml, IQR 0.9 ng/ml). Calreticulin concentrations in the synovial fluid correlated with the tender and swollen joint counts and the activity scores on the 28-joint Disease Activity Score assessment. Calreticulin also bound directly to FasL. In vitro, calreticulin (2-16 ng/ml) inhibited FasL-induced apoptosis of Jurkat T cells. CONCLUSION Calreticulin was present at higher concentrations in the plasma and synovial fluid of RA patients. Calreticulin had the capacity to bind directly to FasL and to inhibit FasL-mediated apoptosis of Jurkat T cells, and thus might play a role in inhibiting apoptosis of inflammatory T cells in RA.
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Affiliation(s)
- Joanna M Tarr
- Peninsula College of Medicine and Dentistry, and University of Exeter, Exeter, UK
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Park HJ, Han ES, Park DK, Lee C, Lee KW. An extract of Phellinus linteus grown on germinated brown rice inhibits inflammation markers in RAW264.7 macrophages by suppressing inflammatory cytokines, chemokines, and mediators and up-regulating antioxidant activity. J Med Food 2010; 13:1468-77. [PMID: 20874228 DOI: 10.1089/jmf.2010.1131] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The immunomodulatory activity of an organic extract of Phellinus linteus grown on slightly germinated brown rice (PBR) was previously demonstrated. Here, we investigated the possible anti-inflammatory activity of the PBR extract by analyzing its effect on the expression of macrophage-derived cytokines, chemokines, and mediator genes that participate in immune and inflammatory responses and diseases. The extract profoundly inhibited the induction of cytokines and chemokines, including tumor necrosis factor-α, chemokine (C-X-C motif) ligand-10, granulocyte-macrophage colony-stimulating factor, and interleukin-6, in lipopolysaccharide (LPS)-stimulated RAW264.7 mouse macrophage cells. It also greatly inhibited LPS-stimulated production of nitric oxide (NO) and prostaglandin E(2) in RAW264.7 cells by suppressing the expression of inducible NO synthase and cyclooxygenase-2. PBR extract inhibited NO production with a twofold lower half-maximal inhibitory concentration value than P. linteus extract. To elucidate the underlying mechanism of action, we examined the effect of the PBR extract on the LPS-induced phosphorylation of mitogen-activated protein kinases (MAPKs) in RAW264.7 cells. PBR extract greatly inhibited extracellular signal-regulated kinase and c-Jun N-terminal kinase phosphorylation and slightly inhibited p38 MAPK phosphorylation. It also significantly increased intracellular glutathione peroxidase activity and heme oxygenase-1 protein expression. Thus, the PBR extract has anti-inflammatory activity in LPS-stimulated RAW264.7 cells by virtue of its ability to suppress the production of inflammatory cytokines and chemokines via inhibition of MAPK activation and up-regulation of antioxidant activities.
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Affiliation(s)
- Hye-Jin Park
- Department of Bioscience and Biotechnology, Konkuk University, Seoul, Republic of Korea.
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Holoshitz J, Ling S. Nitric Oxide Signaling Triggered by the Rheumatoid Arthritis Shared Epitope: A New Paradigm for MHC Disease Association? Ann N Y Acad Sci 2007; 1110:73-83. [PMID: 17911422 DOI: 10.1196/annals.1423.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Many immune-mediated diseases are associated with particular MHC class I or class II alleles. In rheumatoid arthritis (RA-shared), the vast majority of patients possess HLA-DRB1 alleles encoding a shared epitope, which is a five-amino acid sequence motif in positions 70-74 of the HLA-DRbeta chain. The mechanistic basis for this association is unknown. Here we discuss recent evidence suggesting that the shared epitope may act as an allele-specific ligand that triggers increased nitric oxide (NO) production in opposite cells with resultant immune dysregulation. We propose that by doing that, the RA-shared shared epitope may form an unintended bridge between the innate and adaptive immune systems, thereby allowing aberrant signaling events that could trigger disease.
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Affiliation(s)
- Joseph Holoshitz
- Department of Internal Medicine, University of Michigan Medical Center, 5520 MSRB I, Ann Arbor, Michigan 48109-0680, USA.
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Raghav SK, Gupta B, Shrivastava A, Das HR. Inhibition of lipopolysaccharide-inducible nitric oxide synthase and IL-1β through suppression of NF-κB activation by 3-(1′-1′-dimethyl-allyl)-6-hydroxy-7-methoxy-coumarin isolated from Ruta graveolens L. Eur J Pharmacol 2007; 560:69-80. [PMID: 17292351 DOI: 10.1016/j.ejphar.2007.01.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2006] [Revised: 01/06/2007] [Accepted: 01/10/2007] [Indexed: 12/21/2022]
Abstract
The Ruta graveolens L. plant is used in traditional medicine to treat a large number of diseases. The methanol (50%) extract of the whole plant was observed to inhibit the expression of inducible nitric oxide synthase (iNOS) and the cycloxygenase-2 (COX-2) gene in lipopolysaccharide (LPS)-induced macrophage cells (J774A.1, [Raghav, S.K., Gupta, B., Agrawal, C., Goswami, K., Das, H.R., 2006b. Anti-inflammatory effect of Ruta graveolens L. in murine macrophage cells. J. Ethnopharmacol. 104, 234-239]). The effect of whole plant extract on the expression of other pro-inflammatory genes such as tumor necrosis factor-alpha (TNF-alpha), interleukin-1beta (IL-1beta), IL-12, interferon-gamma (IFN-gamma) and the activation of nuclear factor-kB (NF-kappaB) were investigated in LPS stimulated macrophage cells. An active compound was isolated from this methanol extract by further solvent fractionation and reverse phase high performance liquid chromatography (RP-HPLC). The purified compound was identified as 3-(1'-1'-dimethyl-allyl)-6-hydroxy-7-methoxy-coumarin having IUPAC nomenclature of 6-hydroxy-7-methoxy-3-(2-methyl but-3-en-2yl)-2H-chromen-2-one by ESI-MS, MALDI, FT-IR and NMR. Effect of this purified compound was assessed on iNOS, COX-2 and various pro-inflammatory cytokine genes and was observed to inhibit both the protein and mRNA expression of iNOS and IL-1beta in LPS challenged macrophages. Electrophoretic mobility shift assay (EMSA) and Western blot analyses indicated that the plant extract and the isolated active compound blocked the LPS-induced activation of NF-kappaB through the prevention of inhibitor-kB (IkB) degradation. The purified compound also showed the anti-oxidant activity. The active compound at a dose of 40 mg/kg body weight was observed to inhibit the iNOS and IL-1beta gene expression significantly in endotoxin-induced inflammatory model of BALB/c mice. The low level of nitric oxide production was also observed in the sera of compound treated mice. The normal behavioral condition in LPS challenged BALB/c mice was noticed when these were treated with active compound.
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Affiliation(s)
- Sunil Kumar Raghav
- Proteomics and Structural Biology Division, Institute of Genomics and Integrative Biology, Delhi University Campus, Mall Road, Delhi-110 007, India
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Meyer LH, Franssen L, Pap T. The role of mesenchymal cells in the pathophysiology of inflammatory arthritis. Best Pract Res Clin Rheumatol 2007; 20:969-81. [PMID: 16980218 DOI: 10.1016/j.berh.2006.06.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Rheumatoid arthritis (RA) is a chronic inflammatory disorder of the joints that can cause severe disability. While the role of inflammatory cells in the pathogenesis of RA has been well established, the specific contribution of resident cells within the synovial membrane, especially those of mesenchymal origin, has become the object of closer scrutiny only recently. The central position of these cells in the disease process of RA is underlined by their involvement in its main pathophysiological features: inflammation, hyperplasia and joint destruction. In this chapter, we provide a characterisation of resident mesenchymal cells, specifically fibroblast-like cells in the rheumatoid synovium, and give an overview of the molecular pathways by which these cells are involved in the initiation and perpetuation of RA.
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Affiliation(s)
- Lars-Henrik Meyer
- Division of Molecular Medicine of Musculoskeletal Tissue, Department of Orthopedics, University Hospital Muenster, Domagkstrasse 3, D-48149 Munster, Germany
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Busteed S, Bennett MW, Molloy C, Houston A, Stone MA, Shanahan F, Molloy MG, O'Connell J. Bcl-xL expression in vivo in rheumatoid synovium. Clin Rheumatol 2006; 25:789-93. [PMID: 16572289 DOI: 10.1007/s10067-005-0191-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2005] [Accepted: 06/20/2005] [Indexed: 10/24/2022]
Abstract
To examine the expression of the apoptosis regulatory protein, Bcl-x(L), in the synovium of patients with rheumatoid arthritis (RA) and osteoarthritis (OA). Immunohistochemistry for Bcl-x(L) was carried out on synovial samples from patients with RA and OA. Reverse transcriptase polymerase chain reaction (RT-PCR) and Western blot analysis were performed to qualitatively examine the expression of Bcl-x(L). Bcl-x(L) expression was detected in the lining, endothelium and inflammatory cells of both RA (n=20) and OA (n=10) samples. However, there was significantly more expression in the lining of RA synovium compared to OA (77 vs 61%, p<0.05). Many of the positive cells in the RA subsynovium were noted to be plasma cells. There was a significant correlation between Bcl-x(L) expression and the number of inflammatory cells in the subsynovium of RA and OA patients (r (s)=0.376, p<0.05, n=30). Age and disease duration did not correlate with Bcl-x(L) expression in rheumatoid patients. Bcl-x(L) may play a role in the extended survival of synoviocytes and inflammatory cells in rheumatoid synovium.
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Affiliation(s)
- S Busteed
- Department of Medicine, Cork University Hospital, National University of Ireland, Wilton, Cork, Ireland.
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Bokarewa M, Tarkowski A. Manipulation of apoptosis as a treatment modality in rheumatoid arthritis. ACTA ACUST UNITED AC 2006. [DOI: 10.2217/17460816.1.1.91] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Palao G, Santiago B, Galindo MA, Rullas JN, Alcamí J, Ramirez JC, Pablos JL. Fas activation of a proinflammatory program in rheumatoid synoviocytes and its regulation by FLIP and caspase 8 signaling. ACTA ACUST UNITED AC 2006; 54:1473-81. [PMID: 16646028 DOI: 10.1002/art.21768] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVE The expansion of an aggressive population of fibroblast-like synoviocytes (FLS) in rheumatoid arthritis (RA) synovium occurs despite their expression of functional death receptors and exposure to death receptor ligands. FLS can survive Fas challenge because of the constitutive expression of FLIP apoptosis inhibitor. We investigated whether Fas signaling plays a pathogenetic role by activating a nonapoptotic proinflammatory program in RA FLS. METHODS Cultured RA FLS were stimulated with an agonistic anti-Fas antibody in the presence or absence of the caspase inhibitor Z-VAD-FMK or after RNA interference with a short hairpin RNA expression plasmid directed against FLIP. NF-kappaB and activator protein 1 (AP-1) activation was studied by electrophoretic mobility shift assays and p65 immunofluorescence analysis, and expression of messenger RNA (mRNA) for monocyte chemoattractant protein 1, interleukin-8, IkappaB alpha, and matrix metalloproteinases (MMPs) 1, 9, and 13 was examined by reverse transcription-polymerase chain reaction. Chemotactic activity of Fas-activated FLS-conditioned media was studied in Transwell migration assays. RESULTS Fas stimulation activated NF-kappaB and AP-1, and this response required caspase activity, since Z-VAD-FMK inhibitor precluded it. FLIP was processed to p43 protein after Fas stimulation in a caspase-dependent manner, and inhibition of FLIP expression resulted in reduced Fas-triggered NF-kappaB activation. Fas stimulation increased expression of mRNA for IkappaB alpha, MMPs, and chemokines, and Fas-activated RA FLS displayed increased chemotactic activity for monocytic cells. CONCLUSION Fas triggering may contribute to the proinflammatory features of RA FLS by activating NF-kappaB and AP-1 and by expression of relevant target genes, such as MMPs and chemokines. Fas proinflammatory signaling is dependent upon caspase activity and FLIP expression. These data implicate FLIP as a potentially important molecular switch that turns the Fas signaling away from apoptosis and toward induction of a proinflammatory phenotype in RA FLS.
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Affiliation(s)
- Guillermo Palao
- Servicio de Reumatología, Hospital 12 de Octubre, Madrid, Spain.
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Pi X, Tan SY, Hayes M, Xiao L, Shayman JA, Ling S, Holoshitz J. Sphingosine kinase 1–mediated inhibition of Fas death signaling in rheumatoid arthritis B lymphoblastoid cells. ACTA ACUST UNITED AC 2006; 54:754-64. [PMID: 16508940 DOI: 10.1002/art.21635] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE It is becoming increasingly apparent that B cells play an important role in the pathogenesis of rheumatoid arthritis (RA). Due to the scarcity of B cells in RA, it has been technically difficult to functionally characterize B cell apoptosis in this disease. As a necessary first step to identify candidate aberrations, we investigated Fas-mediated signaling events in immortalized peripheral blood B lymphoblastoid cell lines (LCLs) from patients with RA and controls. METHODS Cell death was determined by the MTS assay, and apoptosis was detected by the TUNEL assay and DNA laddering. Proteolytic activation of caspase 3 was determined by immunoblotting, and its enzymatic activity was determined by a fluorometric technique. Messenger RNA (mRNA) expression was quantified by real-time polymerase chain reaction (PCR) analysis. The functional role of sphingosine kinase (SPHK) was determined by measuring its enzymatic activity, by quantifying the levels of its product, sphingosine 1-phosphate (S1P), and by investigating the ability of the SPHK inhibitor N,N-dimethylsphingosine and isozyme-specific small interfering RNA (siRNA) oligonucleotides to reverse signaling aberrations. RESULTS LCLs from patients with RA displayed disease-specific Fas-mediated signal transduction impairment with consequent resistance to cell death. RA LCLs displayed high constitutive SPHK activity and increased levels of S1P. Real-time PCR analysis showed higher SPHK-1 mRNA expression levels in RA patients compared with paired controls. Increased SPHK-1 (but not SPHK-2) mRNA levels were observed in synovial tissue from RA patients. Competitive inhibitors of SPHK reversed the resistance of RA LCLs to Fas-induced apoptosis. Additionally, resistance to Fas-mediated signaling was reversed by siRNA oligonucleotides specific for SPHK-1 but not by oligonucleotides specific for SPHK-2. CONCLUSION These findings demonstrate disease-specific resistance to Fas-mediated death signaling in patients with RA and implicate increased SPHK-1 activity as the cause of this aberration.
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Affiliation(s)
- Xiujun Pi
- University of Michigan Medical Center, Ann Arbor 48109-0680, USA
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Ling S, Lai A, Borschukova O, Pumpens P, Holoshitz J. Activation of nitric oxide signaling by the rheumatoid arthritis shared epitope. ACTA ACUST UNITED AC 2006; 54:3423-32. [PMID: 17075829 DOI: 10.1002/art.22178] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVE Susceptibility to rheumatoid arthritis (RA) is closely associated with HLA-DRB1 alleles encoding a shared epitope (SE) in positions 70-74 of the HLA-DRbeta chain. The mechanistic basis for this association is unknown. Given the proposed pathogenic role of nitric oxide (NO) in RA, this study was undertaken to examine whether the SE can trigger NO signaling events. METHODS The intracellular levels of NO were measured with the fluorescent NO probe 4,5-diaminofluorescein diacetate and by the 2,3-diaminonaphthalene method. NO synthase activity was determined by measuring the rate of conversion of radioactive arginine to citrulline. Levels of cGMP were measured with a commercial enzyme-linked immunosorbent assay, and the cytolytic activity of T cells was measured using a standard (51)Cr release assay. RESULTS Lymphoblastoid B cell lines carrying SE-positive HLA-DR alleles displayed a higher rate of spontaneous NO production compared with SE-negative cells. L cell transfectants expressing SE-positive DR molecules on their surface also generated higher levels of NO. Tetrameric HLA-DR molecules containing a DRbeta-chain encoded by the SE-positive DRB1*0401 allele stimulated fibroblast cells to produce higher levels of NO compared with cells stimulated with a control HLA-DR tetramer. Multimeric hepatitis B core proteins engineered to express region 65-79 encoded by the DRB1*0401 allele, but not the same region encoded by the control allele DRB1*0402, stimulated NO production in fibroblasts. Similarly, synthetic 15-mer peptides corresponding to the region 65-79 encoded by SE-positive alleles triggered increased NO levels when incubated with class II major histocompatibility complex-negative cells. The signaling pathway was found to involve NO synthase activation, followed by increased production of cGMP. SE-triggered increased NO levels inhibited cytolytic elimination of target cells. CONCLUSION The SE can trigger NO-mediated signaling events in opposite cells, and may thereby contribute to RA pathogenesis.
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Affiliation(s)
- Song Ling
- University of Michigan, Ann Arbor 48109-0680, USA
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Wu Y, Liu J, Feng X, Yang P, Xu X, Hsu HC, Mountz JD. Synovial fibroblasts promote osteoclast formation by RANKL in a novel model of spontaneous erosive arthritis. ACTA ACUST UNITED AC 2005; 52:3257-68. [PMID: 16200600 DOI: 10.1002/art.21354] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
OBJECTIVE Erosion of cartilage and bone is a hallmark of rheumatoid arthritis (RA). This study was undertaken to explore the roles of hyperproliferating synovial fibroblasts and macrophages in abnormal osteoclast formation, using the recently described BXD2 mouse model of RA. METHODS Cell distribution in the joints was analyzed by immunohistochemistry, using tartrate-resistant acid phosphatase (TRAP) staining to identify osteoclasts. To identify the defective cells in BXD2 mice, mouse synovial fibroblasts (MSFs) were cultured with bone marrow-derived macrophages. Osteoclast formation was assayed by TRAP staining and bone resorption pit assay, and the cytokine profiles of the MSFs and macrophages were determined by quantitative real-time polymerase chain reaction and enzyme-linked immunosorbent assay. RESULTS In BXD2 mice, TRAP-positive osteoclasts were found at sites of active bone erosion, in close proximity to hyperproliferating synovial fibroblasts. On coculture, MSFs from BXD2 mice, but not C57BL/6 mice, produced high levels of RANKL messenger RNA, induced macrophages to form osteoclasts, and actively eroded bone slices, through a mechanism(s) that could be blocked by pretreatment with osteoprotegerin. Although macrophages from BXD2 mice expressed higher basal levels of tumor necrosis factor alpha (TNFalpha), interleukin-1beta (IL-1beta), and IL-6 than those from C57BL/6 mice, abnormal osteoclast formation was not due to enhanced sensitivity of the BXD2 mouse macrophages to RANKL. TNFalpha, produced by both BXD2 MSFs and BXD2 mouse macrophages, had a strong stimulatory effect on RANKL expression. CONCLUSION BXD2 MSFs produce RANKL and induce the development of osteoclasts from macrophages. The enhanced production of RANKL is possibly due to autocrine stimulation, together with paracrine stimulation by factors produced by macrophages.
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Affiliation(s)
- Yalei Wu
- University of Alabama at Birmingham, Birmingham, Alabama 35294, USA
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14
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Nikitakis NG, Sauk JJ, Papanicolaou SI. The role of apoptosis in oral disease: mechanisms; aberrations in neoplastic, autoimmune, infectious, hematologic, and developmental diseases; and therapeutic opportunities. ACTA ACUST UNITED AC 2004; 97:476-90. [PMID: 15088032 DOI: 10.1016/j.tripleo.2003.12.032] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Apoptosis is a genetically programmed form of cell death, which primarily functions to eliminate senescent or altered cells that are useless or harmful for the multicellular organism. Contrary to necrosis, apoptosis represents a physiologic cellular mechanism, normal function and control of which are critical for the development and homeostasis of multicellular organisms. In contrast, aberrations of the apoptotic mechanisms that cause excessive or deficient programmed cell death have been linked to a wide array of pathologic conditions. This review briefly summarizes the major apoptotic pathways and molecules and presents the most important oral diseases that are related to dysregulation of apoptosis. Knowledge of the association between aberrations in apoptotic mechanisms and human pathology hopefully will be implemented for the design of improved diagnostic and prognostic assays and the development of novel, more efficient, therapeutic strategies.
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Affiliation(s)
- Nikolaos G Nikitakis
- Department of Diagnostic Sciences and Pathology, University of Maryland, Baltimore 21201, USA.
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15
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Beasley TM, Page GP, Brand JPL, Gadbury GL, Mountz JD, Allison DB. Chebyshev's inequality for nonparametric testing with small N and alpha in microarray research. J R Stat Soc Ser C Appl Stat 2004. [DOI: 10.1111/j.1467-9876.2004.00428.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Liu Z, Xu X, Hsu HC, Tousson A, Yang PA, Wu Q, Liu C, Yu S, Zhang HG, Mountz JD. CII-DC-AdTRAIL cell gene therapy inhibits infiltration of CII-reactive T cells and CII-induced arthritis. J Clin Invest 2003; 112:1332-41. [PMID: 14597760 PMCID: PMC228459 DOI: 10.1172/jci19209] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Previously, we described an APC-adenovirus (APC-Ad) FasL cell gene therapy method which could be used to deplete autoreactive T cells in vivo. FasL was toxic, however, and controlled regulation of FasL was not achieved. Here we describe an improved approach to delivering TNF-related apoptosis-inducing ligand (TRAIL) in vivo in which collagen II-induced (CII-induced) arthritis-susceptible (CIA-susceptible) DBA/1j mice were treated with CII-pulsed DCs that had been transfected with a novel Ad system. The Ad was engineered to exhibit inducible TRAIL under the control of the doxycycline-inducible (DOX-inducible) tetracycline response element (TRE). Four groups of mice were treated with CII-DC-AdTRAIL+DOX, CII-DC-AdTRAIL (no DOX), CII-DC-AdGFP+DOX, or DC-AdTRAIL+DOX (no CII), beginning 2 weeks after priming with CII in CFA. The incidence of arthritis and infiltration of T cells in the joint was significantly decreased in CII-DC-AdTRAIL+DOX-treated mice. The in vitro splenic T cell proliferative response and induction of IFN-gamma to bovine CII stimulation were also significantly reduced in mice treated with CII-DC-AdTRAIL+DOX. AdTRAIL+DOX was not toxic to DCs or mice but could induce activated T cells to undergo apoptosis in the spleen. Our results suggest that CII-DC-AdTRAIL+DOX cell gene therapy is a safe and effective method for inhibiting the development of CIA.
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Affiliation(s)
- Zhongyu Liu
- Department of Medicine, Division of Clinical Immunology and Rheumatology, The University of Alabama at Birmingham, Birmingham, Alabama 35294, USA
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Liu Z, Xu X, Hsu HC, Tousson A, Yang PA, Wu Q, Liu C, Yu S, Zhang HG, Mountz JD. CII-DC-AdTRAIL cell gene therapy inhibits infiltration of CII-reactive T cells and CII-induced arthritis. J Clin Invest 2003. [DOI: 10.1172/jci200319209] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Gadbury GL, Page GP, Heo M, Mountz JD, Allison DB. Randomization tests for small samples: an application for genetic expression data. J R Stat Soc Ser C Appl Stat 2003. [DOI: 10.1111/1467-9876.00410] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Machner A, Baier A, Wille A, Drynda S, Pap G, Drynda A, Mawrin C, Bühling F, Gay S, Neumann W, Pap T. Higher susceptibility to Fas ligand induced apoptosis and altered modulation of cell death by tumor necrosis factor-alpha in periarticular tenocytes from patients with knee joint osteoarthritis. Arthritis Res Ther 2003; 5:R253-61. [PMID: 12932288 PMCID: PMC193726 DOI: 10.1186/ar789] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2003] [Revised: 05/15/2003] [Accepted: 06/03/2003] [Indexed: 02/07/2023] Open
Abstract
The aim of the present study was to investigate the expression of Fas in periarticular tenocytes of patients with osteoarthritis (OA) and to study their susceptibility to Fas ligand-mediated apoptosis. Tendon samples were obtained from the quadriceps femoris muscle of patients with knee OA and used for histological evaluation, for immunohistochemical detection of Fas, and to establish tenocyte cultures. The expression of Fas mRNA was determined by quantitative PCR. Levels of soluble Fas and soluble tumour necrosis factor (TNF) receptor I were measured using ELISA. Apoptosis was induced with recombinant human Fas ligand and measured by a histone fragmentation assay and flow cytometry. The effects of TNF-alpha were studied by stimulation with TNF-alpha alone or 24 hours before the induction of apoptosis. Tendon samples from non-OA patients were used as controls. Histological evaluation revealed degenerative changes in the tendons of all OA patients but not in the controls. Fas was detected by immunohistochemistry in all specimens, but quantitative PCR revealed significantly higher levels of Fas mRNA in OA tenocytes. In contrast, lower levels of soluble Fas were found in OA tenocytes by ELISA. OA tenocytes were significantly more susceptible to Fas ligand induced apoptosis than were control cells. TNF-alpha reduced the Fas ligand induced apoptosis in OA tenocytes but had no effects on control tenocytes. These data suggest that knee OA is associated with higher susceptibility of periarticular tenocytes to Fas ligand induced apoptosis because of higher expression of Fas but lower levels of apoptosis-inhibiting soluble Fas. These changes may contribute to decreased cellularity in degenerative tendons and promote their rupturing. The antiapoptotic effects of TNF-alpha in OA tenocytes most likely reflect regenerative attempts and must be taken into account when anti-TNF strategies are considered for OA.
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Affiliation(s)
- Andreas Machner
- Department of Orthopedic Surgery, Otto-von-Guericke-University, Magdeburg, Germany
| | - Anja Baier
- Department of Orthopedic Surgery, Otto-von-Guericke-University, Magdeburg, Germany
- Division of Experimental Rheumatology, Otto-von-Guericke-University, Magdeburg, Germany
| | - Aline Wille
- Institute of Immunology, Otto-von-Guericke-University, Magdeburg, Germany
| | - Susanne Drynda
- Division of Experimental Rheumatology, Otto-von-Guericke-University, Magdeburg, Germany
| | - Géza Pap
- Department of Orthopedic Surgery, Otto-von-Guericke-University, Magdeburg, Germany
| | - Andreas Drynda
- Division of Experimental Rheumatology, Otto-von-Guericke-University, Magdeburg, Germany
| | - Christian Mawrin
- Institute of Neuropathology, Otto-von-Guericke-University, Magdeburg, Germany
| | - Frank Bühling
- Institute of Immunology, Otto-von-Guericke-University, Magdeburg, Germany
| | - Steffen Gay
- Center of Experimental Rheumatology, University Hospital Zürich, Switzerland
| | - Wolfram Neumann
- Department of Orthopedic Surgery, Otto-von-Guericke-University, Magdeburg, Germany
| | - Thomas Pap
- Division of Experimental Rheumatology, Otto-von-Guericke-University, Magdeburg, Germany
- Center of Experimental Rheumatology, University Hospital Zürich, Switzerland
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Yamaki K, Hong J, Hiraizumi K, Ahn JW, Zee O, Ohuchi K. Participation of various kinases in staurosporine induced apoptosis of RAW 264.7 cells. J Pharm Pharmacol 2002; 54:1535-44. [PMID: 12495557 DOI: 10.1211/002235702144] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Staurosporine induced apoptosis of RAW 264.7 cells, a mouse macrophage-like cell line, as determined by DNA fragmentation, the increase of annexin V-stained cells, and the cleavage of poly(ADP-ribose)polymerase (PARP), a substrate of caspase. Analysis of the increase in the percentage of sub-G(1) cells revealed that the DNA fragmentation occurred in a time- and concentration-dependent manner at 0.021-2.1 microM of staurosporine. Staurosporine induced phosphorylation of p38 mitogen-activated protein kinase (MAPK) but suppressed spontaneous phosphorylation of p44/42 MAPK. The p38 MAPK inhibitor SB203580, the MAPK/extracellular signal-regulated kinase kinase inhibitor PD98059 and the phosphatidylinositol 3-kinase (PI3K) inhibitor LY294002 potentiated the staurosporine-induced PARP cleavage and DNA fragmentation. The protein kinase A (PKA) inhibitor H-89 potentiated the staurosporine-induced DNA fragmentation without potentiating the PARP cleavage. In contrast, the protein kinase C (PKC) inhibitor Ro-31-8425 suppressed the PARP cleavage and DNA fragmentation. These findings suggested that staurosporine induces apoptosis via the caspase cascade in RAW 264.7 cells. The staurosporine-induced apoptosis is positively regulated by PKC, negatively regulated by p38 MAPK, p44/42 MAPK and PI3K via the caspase cascade, and negatively regulated by PKA without regulation of caspase activation.
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Affiliation(s)
- Kouya Yamaki
- Laboratory of Pathophysiological Biochemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba Aramaki, Aobaku, Sendai, Miyagi 980-8578, Japan
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Zhou Z, Ménard HA. Autoantigenic posttranslational modifications of proteins: does it apply to rheumatoid arthritis? Curr Opin Rheumatol 2002; 14:250-3. [PMID: 11981322 DOI: 10.1097/00002281-200205000-00010] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
There are many posttranslational modifications of proteins of which all are homeostatically important either to carry out a particular structural or functional role or to allow efficient recycling of the amino acid constituents. An important feature of the modified proteins is the acquisition of autoantigenicity. That notion should have been recognized for years with the modifications of immunoglobulin G that constitute new targets for rheumatoid factors. Citrullination or the deimination of arginine residues in proteins creates epitopes that are targeted by rheumatoid autoantibodies with a diagnostic sensitivity and specificity of 40% to 70% and 92% to 99%, respectively. The how, when, and why of the responsible break in tolerance are largely speculative but apoptosis, multiple genetic and environmental influences are likely required. Identifying citrullinated proteins as autoantigens has resulted in new diagnostic and prognostic autoantibody markers for RA and studying the citrullination process and its nature and role in cell biology has provided new insights into its pathogenesis.
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Affiliation(s)
- ZhiJie Zhou
- Division of Rheumatology, McGill University, Montreal, Quebec, Canada
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22
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Zhang HG, Yang P, Xie J, Liu Z, Liu D, Xiu L, Zhou T, Wang Y, Hsu HC, Mountz JD. Depletion of collagen II-reactive T cells and blocking of B cell activation prevents collagen II-induced arthritis in DBA/1j mice. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2002; 168:4164-72. [PMID: 11937577 DOI: 10.4049/jimmunol.168.8.4164] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Collagen II (CII)-induced arthritis in DBA/1j mice is mediated by both CII-reactive T cells and anti-CII Ab-producing B cells. To determine the relative role of these processes in the development of arthritis, we specifically eliminated CII-reactive T cells by treating the mice with CII-pulsed syngeneic macrophages that had been transfected with a binary adenovirus system. These macrophages express murine Fas ligand in a doxycycline-inducible manner with autocrine suicide inhibited by concomitant expression of p35. The mice were treated i.v. with four doses of CII-APC-AdFasLp35Tet or a single dose of AdCMVsTACI (5 x 10(9) PFU), or both simultaneously, beginning 2 wk after priming with CII in CFA. Treatment with CII-APC-AdFasLp35Tet alone or in combination with a single dose of AdCMVsTACI prevented the development of CII-induced arthritis and T cell infiltration in the joint. The elimination of T cells was specific in that a normal T cell response was observed on stimulation with OVA after treatment with CII-APC-AdFasLp35Tet. Treatment with AdCMVsTACI alone prevented production of detectable levels of circulating anti-CII autoantibodies and reduced the severity of arthritis but did not prevent its development. These results indicate that the CII-reactive T cells play a crucial role in the development of CII-induced arthritis and that the anti-CII Abs act to enhance the development of CII-induced arthritis.
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MESH Headings
- Adenoviridae/genetics
- Administration, Oral
- Animals
- Antigen-Presenting Cells/transplantation
- Apoptosis/genetics
- Apoptosis/immunology
- Arthritis, Experimental/immunology
- Arthritis, Experimental/pathology
- Arthritis, Experimental/prevention & control
- Autoantibodies/biosynthesis
- Autocrine Communication/genetics
- Autocrine Communication/immunology
- B-Lymphocytes/immunology
- Cartilage, Articular/metabolism
- Cartilage, Articular/pathology
- Cell Migration Inhibition
- Collagen Type II/administration & dosage
- Collagen Type II/immunology
- Cytomegalovirus/genetics
- Down-Regulation/genetics
- Down-Regulation/immunology
- Drug Therapy, Combination
- Fas Ligand Protein
- Female
- Genetic Vectors/administration & dosage
- Genetic Vectors/therapeutic use
- Inhibitor of Apoptosis Proteins
- Lymphocyte Activation/genetics
- Lymphocyte Depletion/methods
- Macrophages, Peritoneal/transplantation
- Membrane Glycoproteins/biosynthesis
- Membrane Glycoproteins/genetics
- Membrane Proteins
- Mice
- Mice, Inbred DBA
- Receptors, Tumor Necrosis Factor/biosynthesis
- Receptors, Tumor Necrosis Factor/genetics
- Receptors, Tumor Necrosis Factor/physiology
- Solubility
- T-Lymphocyte Subsets/immunology
- T-Lymphocyte Subsets/pathology
- Tetracycline Resistance/genetics
- Trans-Activators/genetics
- Transmembrane Activator and CAML Interactor Protein
- Viral Proteins/genetics
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Apparailly F, Gay S, Jorgensen C. Designing novel therapeutic strategies for rheumatic diseases. Trends Immunol 2001; 22:537-9. [PMID: 11702719 DOI: 10.1016/s1471-4906(01)02025-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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