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Synovial stromal cells from rheumatoid arthritis patients attract monocytes by producing MCP-1 and IL-8.

Hayashida K, Nanki T, Girschick H, Yavuz S, Ochi T, Lipsky PE - Arthritis Res. (2001)

Bottom Line: Macrophages that accumulate in the synovium of rheumatoid arthritis patients play an important role in the pathogenesis of this inflammatory disease.However, the mechanism by which macrophages are attracted into the inflamed synovium and accumulate there has not been completely delineated.These results suggest that one of the mechanisms by which macrophages accumulate in the inflamed synovium is by responding to the chemokines produced locally.

View Article: PubMed Central - PubMed

Affiliation: University of Texas, Southwestern Medical Center, Dallas, Texas, USA. lipskyp@mail.nih.gov

ABSTRACT
Macrophages that accumulate in the synovium of rheumatoid arthritis patients play an important role in the pathogenesis of this inflammatory disease. However, the mechanism by which macrophages are attracted into the inflamed synovium and accumulate there has not been completely delineated. The results of this study show that rheumatoid arthritis synovial stromal cells produce the chemokines monocyte chemotactic protein-1 and IL-8, and these have the capacity to attract peripheral monocytes. These results suggest that one of the mechanisms by which macrophages accumulate in the inflamed synovium is by responding to the chemokines produced locally.

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Chemokine production by various cell lines. Production of MCP-1, IL-8, RANTES, IP-10, and MIP-1β was measured by ELISA. Various cell lines (1 × 105/ml) were cultured for 24 h with 2 ml DMEM containing 5% FBS, and supernatants were collected. The contents of (A) MCP-1, (B) IL-8, and (C) RANTES are shown; MIP-1β and IP-10 were not detected (less than 10 pg/ml). RA6/1, RA8/3, and Sy77 are RA SCLs, OA5/26 is a SCL from OA, and FBHG is a skin fibroblast line. The mean and SEM were calculated from triplicates of one representative experiment out of three with similar results. Statistical analysis was performed with the Student t test. *P < 0.05 and **P < 0.01.
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Figure 4: Chemokine production by various cell lines. Production of MCP-1, IL-8, RANTES, IP-10, and MIP-1β was measured by ELISA. Various cell lines (1 × 105/ml) were cultured for 24 h with 2 ml DMEM containing 5% FBS, and supernatants were collected. The contents of (A) MCP-1, (B) IL-8, and (C) RANTES are shown; MIP-1β and IP-10 were not detected (less than 10 pg/ml). RA6/1, RA8/3, and Sy77 are RA SCLs, OA5/26 is a SCL from OA, and FBHG is a skin fibroblast line. The mean and SEM were calculated from triplicates of one representative experiment out of three with similar results. Statistical analysis was performed with the Student t test. *P < 0.05 and **P < 0.01.

Mentions: Chemokines secreted into the culture supernatants of cell lines were measured by ELISA (Fig. 4). Production of MCP-1 and IL-8 by RA SCLs was greater than that by OA SCL and the fibroblast line. The cell lines produced low levels of RANTES, whereas IP-10 and MIP1-β were not detected (data not shown).


Synovial stromal cells from rheumatoid arthritis patients attract monocytes by producing MCP-1 and IL-8.

Hayashida K, Nanki T, Girschick H, Yavuz S, Ochi T, Lipsky PE - Arthritis Res. (2001)

Chemokine production by various cell lines. Production of MCP-1, IL-8, RANTES, IP-10, and MIP-1β was measured by ELISA. Various cell lines (1 × 105/ml) were cultured for 24 h with 2 ml DMEM containing 5% FBS, and supernatants were collected. The contents of (A) MCP-1, (B) IL-8, and (C) RANTES are shown; MIP-1β and IP-10 were not detected (less than 10 pg/ml). RA6/1, RA8/3, and Sy77 are RA SCLs, OA5/26 is a SCL from OA, and FBHG is a skin fibroblast line. The mean and SEM were calculated from triplicates of one representative experiment out of three with similar results. Statistical analysis was performed with the Student t test. *P < 0.05 and **P < 0.01.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC17828&req=5

Figure 4: Chemokine production by various cell lines. Production of MCP-1, IL-8, RANTES, IP-10, and MIP-1β was measured by ELISA. Various cell lines (1 × 105/ml) were cultured for 24 h with 2 ml DMEM containing 5% FBS, and supernatants were collected. The contents of (A) MCP-1, (B) IL-8, and (C) RANTES are shown; MIP-1β and IP-10 were not detected (less than 10 pg/ml). RA6/1, RA8/3, and Sy77 are RA SCLs, OA5/26 is a SCL from OA, and FBHG is a skin fibroblast line. The mean and SEM were calculated from triplicates of one representative experiment out of three with similar results. Statistical analysis was performed with the Student t test. *P < 0.05 and **P < 0.01.
Mentions: Chemokines secreted into the culture supernatants of cell lines were measured by ELISA (Fig. 4). Production of MCP-1 and IL-8 by RA SCLs was greater than that by OA SCL and the fibroblast line. The cell lines produced low levels of RANTES, whereas IP-10 and MIP1-β were not detected (data not shown).

Bottom Line: Macrophages that accumulate in the synovium of rheumatoid arthritis patients play an important role in the pathogenesis of this inflammatory disease.However, the mechanism by which macrophages are attracted into the inflamed synovium and accumulate there has not been completely delineated.These results suggest that one of the mechanisms by which macrophages accumulate in the inflamed synovium is by responding to the chemokines produced locally.

View Article: PubMed Central - PubMed

Affiliation: University of Texas, Southwestern Medical Center, Dallas, Texas, USA. lipskyp@mail.nih.gov

ABSTRACT
Macrophages that accumulate in the synovium of rheumatoid arthritis patients play an important role in the pathogenesis of this inflammatory disease. However, the mechanism by which macrophages are attracted into the inflamed synovium and accumulate there has not been completely delineated. The results of this study show that rheumatoid arthritis synovial stromal cells produce the chemokines monocyte chemotactic protein-1 and IL-8, and these have the capacity to attract peripheral monocytes. These results suggest that one of the mechanisms by which macrophages accumulate in the inflamed synovium is by responding to the chemokines produced locally.

Show MeSH
Related in: MedlinePlus