Increased Natural Killer Cell Cytotoxicity and IL-2 Production in Recurrent Spontaneous Abortion
Article first published online: 7 SEP 2007
American Journal of Reproductive Immunology
Volume 58, Issue 5, pages 409–414, November 2007
How to Cite
Hadinedoushan, H., Mirahmadian, M. and Aflatounian, A. (2007), Increased Natural Killer Cell Cytotoxicity and IL-2 Production in Recurrent Spontaneous Abortion. American Journal of Reproductive Immunology, 58: 409–414. doi: 10.1111/j.1600-0897.2007.00524.x
- Issue published online: 7 OCT 2007
- Article first published online: 7 SEP 2007
- Submitted April 24, 2007; accepted July 18, 2007.
- NK cytotoxicity;
- recurrent spontaneous abortion
To determine whether natural killer (NK) cells cytotoxicity in peripheral blood is altered in patients with a history of recurrent spontaneous abortion (RSA); also, if there is any correlation between cytokine production and NK cytotoxicity.
Method of study
In this case–control study, 21 patients with RSA within 24 hr of the last abortion (group I), and 32 pregnants with no history of abortion (group II) were surveyed. NK cell cytotoxicity was evaluated by flow cytometry, and IL-2, IL-10, transforming growth factor β1 were measured in cell culture supernatant by ELISA method.
Group I showed higher NK cytotoxicity than group II at all of effector to target (E:T) ratios (P ≤ 0.045).The correlation between production of IL-2 and NK cytotoxicity was positively significant (R = 0.350, P = 0.001). Group I had significantly higher levels of IL-2 than group II (P = 0.001). In group II, the production of IL-10 by peripheral blood mononuclear cells was higher than group I (P = 0.002).
Increased NK cell cytotoxicity and high level of IL-2 may be considered as a risk factor for RSA.