ENGLISH ABSTRACT
JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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[Overexpression of programmed cell death 5 factor enhances triptolides-induced fibroblast-like synoviocytes apoptosis in rheumatoid arthritis].

OBJECTIVE: To explore the effect of programmed cell death 5(PDCD5) on apoptosis of rheumatoid arthritis fibroblast-like synoviocytes(RA FLS) induced by triptolide.

METHODS: Cultured synovial cells in vitro from RA patients were transfected with Ad-PDCD5.At protein level, expression of PDCD5 in RA FLS infected with Ad-PDCD5 was detected by Western blot.RA FLS infected with Ad-PDCD5 were cultured in presence or absence of triptolide and apoptosis of RA FLS was determined by flow cytometry.

RESULTS: Infection of RA FLS with increasing concentrations of Ad-PDCD5(50-300 MOI) resulted in a does-dependent increase in the production of PDCD5. Apoptotic cells percentage for noinfection group, Ad-null group and Ad-PDCD5 group were(22.41 +/- 3.87)%, (28.77 +/- 12.97)% and (48.87 +/- 12.69)%, respectively. Alternatively, infection without addition of triptolide stimuli had no effect. The data showed that gene transfection of PDCD5 alone without addition of triptolide was not sufficient to activate RA FLS apoptosis, PDCD5 acted as an enhancer rather than inductor of apoptosis.

CONCLUSION: Overexpression of PDCD5 could enhance apoptosis of RA FLS induced by triptolide, PDCD5 may be a potential therapeutic target to RA.

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