T cells play an important role in the initiation and the progression of rheumatoid arthritis (RA) and depletion of potentially pathogenic T cells was suggested as an important therapeutic protocol. We determined if rosmarinic acid (RosA), known as a secondary metabolite from herbal plants, had apoptotic activity toward T cells from RA patients and further verified target T-cell subsets. CD3+CD25+ activated T-cell subsets from most of the RA patients displayed significantly higher apoptosis rates than did the PBMCs and total CD3+ T cells. Furthermore, activated and effector CD4+ T cells, including CD4+CD25+ and CD4+CD45RO+ T cells, had a tendency of being more susceptible to RosA-induced apoptosis than that of resting and naïve T-cell subsets. RosA induced the release of cytochrome c from mitochondria and the blockage of mitochondrial depolarization inhibited apoptosis. Taken together, these results suggest that RosA induces apoptosis of activated T-cell subsets from RA patients via a mitochondrial pathway.
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Abbreviations
- RA:
-
rheumatoid arthritis
- RosA:
-
rosmarinic acid
- CII:
-
type II collagen
- RANKL:
-
receptor activator of NF-κB ligand
- FasL:
-
Fas ligand
- MMP:
-
mitochondrial membrane potential
- BA:
-
bongkrekic acid.
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ACKNOWLEDGMENTS
This work was supported by the Green Cross Corp. and by the Korean Ministry of Science and Technology under Grant CBM2-A500-001-1-0-0.
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HUR, YG., SUH, CH., KIM, S. et al. Rosmarinic Acid Induces Apoptosis of Activated T Cells from Rheumatoid Arthritis Patients via Mitochondrial Pathway. J Clin Immunol 27, 36–45 (2007). https://doi.org/10.1007/s10875-006-9057-8
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DOI: https://doi.org/10.1007/s10875-006-9057-8