Evidence that rheumatoid arthritis synovial T cells are similar to cytokine-activated T cells: involvement of phosphatidylinositol 3-kinase and nuclear factor kappaB pathways in tumor necrosis factor alpha production in rheumatoid arthritis.
OBJECTIVE: To investigate the mechanism that leads to the spontaneous production of tumor necrosis factor alpha (TNFalpha) in rheumatoid arthritis (RA) synovial tissue. METHODS: Normal blood monocytes were cocultured either with fixed activated T cells generated from normal blood or RA synovial T c...
| Hlavní autoři: | , , , , , |
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| Médium: | Journal article |
| Jazyk: | English |
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2002
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| _version_ | 1826272504301223936 |
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| author | Brennan, F Hayes, A Ciesielski, C Green, P Foxwell, B Feldmann, M |
| author_facet | Brennan, F Hayes, A Ciesielski, C Green, P Foxwell, B Feldmann, M |
| author_sort | Brennan, F |
| collection | OXFORD |
| description | OBJECTIVE: To investigate the mechanism that leads to the spontaneous production of tumor necrosis factor alpha (TNFalpha) in rheumatoid arthritis (RA) synovial tissue. METHODS: Normal blood monocytes were cocultured either with fixed activated T cells generated from normal blood or RA synovial T cells purified from synovium. TNFalpha production was measured in supernatants from these cocultures following blockade of the transcription factor nuclear factor kappaB (NF-kappaB) using adenoviral transfer of the inhibitor of NF-kappaB kinase alpha into the responding monocytes, or blockade of phosphatidylinositol 3-kinase (PI 3-kinase) using the inhibitory drugs wortmannin or LY294002. TNFalpha production was measured by enzyme-linked immunosorbent assay. RESULTS: TNFalpha production in synovial tissue from patients with RA but not osteoarthritis was found to be T cell dependent. The RA synovial joint T cells resembled normal T cells that had been activated for 8 days using a cocktail of cytokines. These T cells, designated Tck (cytokine-activated T cells), and RA synovial T cells both induced TNFalpha production in resting monocytes in a cell-contact-dependent manner, which was abrogated by blockage of the transcription factor NF-kappaB but augmented if PI 3-kinase was inhibited. Normal blood T cells activated conventionally via the T cell receptor with crosslinked anti-CD3 antibody resulted in TNFalpha production from monocytes; this was unaffected by NF-kappaB blockade, but was inhibited in the presence of PI 3-kinase-blocking drugs. CONCLUSION: These data provide strong evidence for the importance of T cells in inducing TNFalpha in chronic inflammatory rheumatoid tissue, and give insight into the mechanism whereby these T cells are activated in vivo. Furthermore, they indicate that production of TNFalpha in pathologic tissue is regulated differently from physiologic antigen-dependent TNFalpha production, which raises the possibility that selective inhibitors of TNFalpha in disease may be developed. |
| first_indexed | 2024-03-06T22:13:36Z |
| format | Journal article |
| id | oxford-uuid:52a722dc-add7-45db-bd9e-0edcca0c066b |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:13:36Z |
| publishDate | 2002 |
| record_format | dspace |
| spelling | oxford-uuid:52a722dc-add7-45db-bd9e-0edcca0c066b2022-03-26T16:26:51ZEvidence that rheumatoid arthritis synovial T cells are similar to cytokine-activated T cells: involvement of phosphatidylinositol 3-kinase and nuclear factor kappaB pathways in tumor necrosis factor alpha production in rheumatoid arthritis.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:52a722dc-add7-45db-bd9e-0edcca0c066bEnglishSymplectic Elements at Oxford2002Brennan, FHayes, ACiesielski, CGreen, PFoxwell, BFeldmann, M OBJECTIVE: To investigate the mechanism that leads to the spontaneous production of tumor necrosis factor alpha (TNFalpha) in rheumatoid arthritis (RA) synovial tissue. METHODS: Normal blood monocytes were cocultured either with fixed activated T cells generated from normal blood or RA synovial T cells purified from synovium. TNFalpha production was measured in supernatants from these cocultures following blockade of the transcription factor nuclear factor kappaB (NF-kappaB) using adenoviral transfer of the inhibitor of NF-kappaB kinase alpha into the responding monocytes, or blockade of phosphatidylinositol 3-kinase (PI 3-kinase) using the inhibitory drugs wortmannin or LY294002. TNFalpha production was measured by enzyme-linked immunosorbent assay. RESULTS: TNFalpha production in synovial tissue from patients with RA but not osteoarthritis was found to be T cell dependent. The RA synovial joint T cells resembled normal T cells that had been activated for 8 days using a cocktail of cytokines. These T cells, designated Tck (cytokine-activated T cells), and RA synovial T cells both induced TNFalpha production in resting monocytes in a cell-contact-dependent manner, which was abrogated by blockage of the transcription factor NF-kappaB but augmented if PI 3-kinase was inhibited. Normal blood T cells activated conventionally via the T cell receptor with crosslinked anti-CD3 antibody resulted in TNFalpha production from monocytes; this was unaffected by NF-kappaB blockade, but was inhibited in the presence of PI 3-kinase-blocking drugs. CONCLUSION: These data provide strong evidence for the importance of T cells in inducing TNFalpha in chronic inflammatory rheumatoid tissue, and give insight into the mechanism whereby these T cells are activated in vivo. Furthermore, they indicate that production of TNFalpha in pathologic tissue is regulated differently from physiologic antigen-dependent TNFalpha production, which raises the possibility that selective inhibitors of TNFalpha in disease may be developed. |
| spellingShingle | Brennan, F Hayes, A Ciesielski, C Green, P Foxwell, B Feldmann, M Evidence that rheumatoid arthritis synovial T cells are similar to cytokine-activated T cells: involvement of phosphatidylinositol 3-kinase and nuclear factor kappaB pathways in tumor necrosis factor alpha production in rheumatoid arthritis. |
| title | Evidence that rheumatoid arthritis synovial T cells are similar to cytokine-activated T cells: involvement of phosphatidylinositol 3-kinase and nuclear factor kappaB pathways in tumor necrosis factor alpha production in rheumatoid arthritis. |
| title_full | Evidence that rheumatoid arthritis synovial T cells are similar to cytokine-activated T cells: involvement of phosphatidylinositol 3-kinase and nuclear factor kappaB pathways in tumor necrosis factor alpha production in rheumatoid arthritis. |
| title_fullStr | Evidence that rheumatoid arthritis synovial T cells are similar to cytokine-activated T cells: involvement of phosphatidylinositol 3-kinase and nuclear factor kappaB pathways in tumor necrosis factor alpha production in rheumatoid arthritis. |
| title_full_unstemmed | Evidence that rheumatoid arthritis synovial T cells are similar to cytokine-activated T cells: involvement of phosphatidylinositol 3-kinase and nuclear factor kappaB pathways in tumor necrosis factor alpha production in rheumatoid arthritis. |
| title_short | Evidence that rheumatoid arthritis synovial T cells are similar to cytokine-activated T cells: involvement of phosphatidylinositol 3-kinase and nuclear factor kappaB pathways in tumor necrosis factor alpha production in rheumatoid arthritis. |
| title_sort | evidence that rheumatoid arthritis synovial t cells are similar to cytokine activated t cells involvement of phosphatidylinositol 3 kinase and nuclear factor kappab pathways in tumor necrosis factor alpha production in rheumatoid arthritis |
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