Abstract | OBJECTIVE: METHODS: RESULTS: The expression of TLR-2 and TLR-4 was increased on CD14+ macrophages from the joints of RA patients compared with that on control in vitro-differentiated macrophages or control peripheral blood monocytes. Neither TLR-2 expression nor TLR-4 expression differed between RA and other forms of inflammatory arthritis. However, PG- and LPS-induced TNFalpha expression and IL-8 expression were greater with RA SF macrophages than with those obtained from the joints of patients with other forms of inflammatory arthritis or with control macrophages. PG-induced TNFalpha expression and IL-8 expression were highly correlated with TLR-2 expression in normal macrophages, but not with that in macrophages obtained from joints of RA patients or patients with other forms of inflammatory arthritis. CONCLUSION: TLR-2 and TLR-4 ligation resulted in increased activation of RA synovial macrophages compared with those from patients with other forms of inflammatory arthritis or compared with control macrophages. Factors other than the level of TLR-2 and TLR-4 expression contributed to the increased activation of RA SF macrophages. These observations support the notion of a potential role for activation through TLR-2 and TLR-4 in the inflammation and joint destruction of RA.
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Authors | QiQuan Huang, Yingyu Ma, Adedamola Adebayo, Richard M Pope |
Journal | Arthritis and rheumatism
(Arthritis Rheum)
Vol. 56
Issue 7
Pg. 2192-201
(Jul 2007)
ISSN: 0004-3591 [Print] United States |
PMID | 17599732
(Publication Type: Journal Article, Research Support, N.I.H., Extramural)
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Chemical References |
- Cytokines
- RNA, Small Interfering
- TLR2 protein, human
- TLR4 protein, human
- Toll-Like Receptor 2
- Toll-Like Receptor 4
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Topics |
- Arthritis, Rheumatoid
(physiopathology)
- Cytokines
(genetics)
- Humans
- Macrophage Activation
(physiology)
- Macrophages
(physiology)
- RNA, Small Interfering
(genetics)
- Reference Values
- Reverse Transcriptase Polymerase Chain Reaction
- Synovial Fluid
(physiology)
- Toll-Like Receptor 2
(genetics, physiology)
- Toll-Like Receptor 4
(genetics, physiology)
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