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Clinical rheumatology

Dynamic changes in the numbers of different subsets of peripheral blood NK cells in patients with systemic lupus erythematosus following classic therapy.


PMID 25024095

Abstract

Imbalance of natural killer (NK) cells is associated with the development of systemic lupus erythematosus (SLE). However, little is known about the dynamic changes on NK cells following therapy. This study aimed at examining the impact of classic therapies on the numbers of different subsets of NK cells in new-onset SLE patients. The numbers of different subsets of peripheral blood NK cells in 24 new-onset SLE patients before, 4 and 12xa0weeks post the classic therapies, and 7 healthy controls were determined by flow cytometry. The potential correlation between the numbers of NK cells and the values of clinical measures was analyzed. In comparison with that before treatment, the numbers of NK, NKG2C+, and KIR2DL3+ NK cells were significantly increased while the numbers of NKp46+ and NKG2A + NK cells significantly decreased at 4 and/or 12xa0weeks post the treatment only in the drug well-responding patients, but not in those poor responders (P < 0.05 for all). The numbers of NKG2C + NK cells were correlated positively with the levels of serum C3 while the numbers of KIR2DL3+ NK cells were correlated negatively with the scores of SLEDAI in these patients at 4xa0weeks post the treatment. The classic therapies modulated the numbers of some subsets of NK cells in drug well-responding SLE patients. The changes in the numbers of some subsets of NK cells may serve as biomarkers for evaluating the therapeutic responses of SLE.

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