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J Assist Reprod Genet ; 32(6): 977-84, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-25925347

RESUMO

PURPOSE: Researchers have hypothesized that an imbalance of immune cells in the uterine decidua and a dysfunction in cytokines they produce may contribute to recurrent pregnancy loss (RPL). The objective of this study was to determine if IL-22, IL-23 and IL-17 are expressed abnormally in the decidua of patients with RPL compared to those women with a normal pregnancy. We also sought to confirm that uterine natural killer (uNK) cells are lower in the decidua of patients with RPL, as well as identify IL-22 expression by uNK cells. METHODS: After meeting strict inclusion criteria, maternal decidua of nine patients with unexplained RPL and a confirmed euploid fetal loss, and 11 gestational age-matched patients undergoing elective pregnancy termination were included in our analysis. Quantitative real time-polymerase chain reaction (qRT-PCR) was performed to quantify RNA expression, Western blot was performed to quantify protein expression and immunohistochemistry (IHC) was performed to identify IL-22 and uNK cells. RESULTS: We found that women with unexplained RPL and a euploid fetal loss had significantly less gene and protein expression of IL-22 in the decidua. Additionally, we found that IL-22 is primarily expressed by uNK cells in the decidua. CONCLUSIONS: In conclusion, our results suggest that lower levels of IL-22 in the uterine decidua in patients with unexplained RPL may contribute to a disruption of decidual homeostasis and ultimately lead to early pregnancy loss.


Assuntos
Aborto Habitual/metabolismo , Aborto Espontâneo/metabolismo , Decídua/metabolismo , Interleucinas/metabolismo , Adulto , Feminino , Homeostase , Humanos , Células Matadoras Naturais/metabolismo , Reação em Cadeia da Polimerase em Tempo Real , Interleucina 22
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