Abstract
BackgroundRecurrent miscarriage is considered as one of the main problems in women's reproductive health. The aim of the present study was to evaluate the natural killer cells (NK cells) and cytokines in unexplained recurrent miscarriage and fertile women. MethodsIn this case–control study, 40 women with unexplained recurrent miscarriage were assigned to the case group and 40 fertile women were assigned to the control group. NK cell subsets (CD56+ CD16+/CD56+ CD16-) and cytokines (IL-2/IL-12) levels in the peripheral blood (PB) were used for assessing immunologic problems. The percentage of peripheral blood NK cells (CD56dim/bright) was identified by flow cytometry. ResultsThe obtained results showed a significant difference in CD56+ CD16+ and CD56+ CD16- between the two groups. Also, there was no significant difference in the IL-2 and IL-12 between the two groups. A cut-off value of ≥5.25% (p < 0.001) and ≥3.4% (p < 0.015) for the increased percentage of CD56+ CD16+ and CD56+ CD16−cells in the PB become predictive of recurrent miscarriage. ConclusionIncreased NK cells in the PB of women with recurrent miscarriage strongly establish prospective researches to recognize the predictive value of these parameters in the evaluation of patients with recurrent miscarriage.
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