Get access

Study on the Relationship Between Th17 Cells and Unexplained Recurrent Spontaneous Abortion

Authors


Yu-Sheng Liu, MD, Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Anhui Provincial Hospital Affiliated to Anhui Medical University, Hefei, 230001, China.
E-mail: shengzhizhongxin@126.com

Abstract

Citation Liu Y-S, Wu L, Tong X-H, Wu L-M, He G-P, Zhou G-X, Luo L-H, Luan H-B. Study on the relationship between Th17 cells and unexplained recurrent spontaneous abortion. Am J Reprod Immunol 2011; 65: 503–511

Problem

What is the relationship between Th17 cells and unexplained recurrent spontaneous abortion (URSA)?

Method of study

CD4+ interleukin (IL)-17A+ T (Th17) cells and CD4+ CD25brightFoxp3+ regulatory T (Treg) cells in peripheral blood were analyzed by flow cytometry; IL-17 concentrations in cell culture supernatants were quantitatively determined by enzyme-linked immunosorbent assay; and IL-17A positive cells in decidua tissues were measured by immunohistochemistry.

Results

The proportion of Th17 cells and IL-17A concentrations was both significantly higher in patients with URSA than in normal early pregnant (NEP) and non-pregnant (NP) patients, Treg frequencies were significantly lower in patients with URSA than in NEP patients, and the ratio of Th17 to Treg was significantly higher in the URSA group than in the other two. Additionally, the percentage of IL-17A cells in deciduas was significantly higher in patients with URSA than in NEP patients.

Conclusions

Human Th17 cells may play a major role in rejecting conceptus antigens and therefore may be harmful to the maintenance of pregnancy. The data also suggest that Treg cells are beneficial to pregnancy. There may exist a balance of Th17/Treg in normal pregnancy.

Get access to the full text of this article

Ancillary