Wasinee KheansaardSumana Mas-Oo-DiSurasak NilganuwongDalina I. TanyongMahidol University2018-10-192018-10-192013-01-01Rheumatology International. Vol.33, No.1 (2013), 151-1561437160X017281722-s2.0-84872321110https://repository.li.mahidol.ac.th/handle/123456789/31978Proinflammatory cytokines play a role in the pathogenesis of anemia of chronic disease (ACD), which is a common cause of anemia in rheumatoid arthritis (RA). Anemia in RA is associated with increased apoptosis of erythroid cells. However, there is unclear information on the mechanism of ACD in the disease. The purpose of this study is to investigate the role of cytokines on nitric oxide-mediated apoptosis in erythroid progenitor cells of ACD in RA patients. Erythroid progenitor cells from healthy subjects and RA patients with ACD were treated with cytokines like interleukin-1β, tumor necrosis factor-α, and interferon-γ at concentrations of 2, 20, and 40 ng/ml for 14 days. Cell viability and cell apoptosis were analyzed by trypan blue staining and flow cytometry, respectively. The results showed that the highest effect of cytokines on reduction cell viability and induction cell apoptosis was found in 20 ng/ml IFN-γ-treated cells of RA patients. In addition, IFN-γ showed significantly increased nitric oxide production and iNOS mRNA expression, which was measured by Griess assay and real-time PCR, respectively. The percentage of cell apoptosis and NO production was reduced after an inducible nitric oxide synthase inhibitor, SMT, treatment. In conclusion, IFN-γ could induce nitric oxide production-mediated apoptosis process, which might be involved in the pathogenesis of ACD in RA patients. © 2012 Springer-Verlag.Mahidol UniversityImmunology and MicrobiologyMedicineArticleSCOPUS10.1007/s00296-011-2307-y