Objective. To extend the lifespan of rheumatoid arthritis fibroblast-like synoviocytes (RA FLS) using human telomerase catalytic subunit (hTERT) and to test the hypothesis that longterm culture of hTERT-RA FLS may display a disease-specific gene expression pattern. Methods. RA 516 FLS were transduced by hTERT and the replicative properties of hTERT-RA 516 FLS were evaluated by repeated expansion. Gene expressions in hTERT-RA 516 FLS (passage 8) were compared with the gene expressions in hTERT-osteoarthritis (OA) 13A FLS (passage 8) by microarrays and RT-PCR. After continuous expansion in culture for an additional 4 months, gene expression was examined again using real-time RT-PCR and microarray. Results. While primary RA 516 FLS stopped dividing after repeated culture for about 120 days, hTERT-RA 516 FLS continued to grow at a steady rate. The hTERT-RA 156 FLS displayed a distinct gene expression pattern different from hTERT-OA 13A FLS. Several putative autoantigens and cytokine A2/monocyte chemoattractant protein-1 were expressed at significantly higher levels in longterm culture of hTERT-RA 516 FLS. Conclusion. Telomerase- transduced RA FLS offer an alternative cell model for the study of RA and for examination of cellular/genetic alterations in RA FLS. Our findings provide further support for the notion that RA FLS are altered cells.
|Original language||English (US)|
|Number of pages||12|
|Journal||Journal of Rheumatology|
|State||Published - Oct 2007|
- Rheumatoid arthritis
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