Effect of intrauterine perfusion of human chorionic gonadotropin before embryo transfer after two or more implantation failures: A systematic review and meta-analysis.
Xie Hebin,Zeng Hong,He Dongmei,Liu Nenghui
European journal of obstetrics, gynecology, and reproductive biology
OBJECTIVE:To investigate whether intrauterine perfusion of hCG before embryo transfer (ET) is effective in women experienced two or more implantation failures. STUDY DESIGN:Systematic review and meta-analysis. In the current meta-analysis, Pubmed, EMBASE and The Cochrane Library were searched for trials which compared the efficacy of intrauterine perfusion of hCG with no perfusion of hCG in women undergoing in vitro fertilization (IVF), intracytoplasmic sperm injection (ICSI), or frozen embryo transfer (FET) before ET. The primary outcomes are the clinical pregnancy rate (CPR) and live birth rate (LBR). RESULTS:Six trials consisted of 1432 women were eligible for quantitative analysis. CPR (including 6 trials consisted of 1432 women) and LBR (including 3 trials consisted of 870 women) were significantly improved in the hCG group compared to the control group, with a CPR of 41.8 % vs. 31.2 % (RR 1.30, 95 % CI 1.14∼1.50, P < .001), an LBR of 27.8 % vs. 18.0 % (RR 1.52, 95 % CI 1.18∼1.96, P = .001). CONCLUSION:Intrauterine perfusion of hCG is effective in improving clinical pregnancy rate and live birth rate in women who experienced two or more implantation failures, which might provide a potential therapeutical intervention for recurrent implantation failure (RIF). Although promising, further evidence from multicenter, randomized controlled trials are needed to confirm the conclusion from the current meta-analysis.
Association between MTHFR polymorphisms (MTHFR C677T, MTHFR A1298C) and recurrent implantation failure: a systematic review and meta-analysis.
Zeng Hong,He Dongmei,Zhao Yuhao,Liu Nen Ghui,Xie Hebin
Archives of gynecology and obstetrics
OBJECTIVE:To investigate whether polymorphism of MTHFR C677T or MTHFR A1298C is associated with recurrent implantation failure (RIF). STUDY DESIGN:This is a systematic review and meta-analysis. Pubmed, EMBASE, and CNKI (China national Knowledge Infrastructure) were searched for case-control studies that evaluated the associations between MTHFR polymorphisms (MTHFR C677T and MTHFR A1298C) and RIF. The pooled odds ratios (ORs) with 95% confidence intervals (CIs) were reported to evaluate the strength of association. Data were synthesized using the random-effect model. RESULTS:Nine case-control studies consisted of 1812 women were included in the quantitative meta-analyses (754 were RIF patients, 1058 were control participants). The synthesized results showed that polymorphism of MTHFR C677T (allele model: OR 1.23, 95% CI 0.99-1.53; dominant model: OR 1.24, 95% CI 0.99-1.54; recessive model: OR 1.31, 95% CI 0.78-2.12; homozygotic model: OR 1.39, 95% CI 0.84-2.28; heterozygotic model: OR 1.14, 95% CI 0.90-1.45) or MTHFR A1298C (allele model: OR 1.11, 95% CI 0.78-1.59; dominant model: OR 0.91, 95% CI 0.65-1.26; recessive model: OR 2.04, 95% CI 0.90-4.64; homozygotic model: OR 1.86, 95% CI 0.79-4.38; heterozygotic model: OR 0.77, 95% CI 0.59-0.99) was not significantly associated with RIF. CONCLUSIONS:Significant association of MTHFR polymorphisms (including MTHFR C677T and MTHFR A1298C) and RIF could not be confirmed.
H19 regulates angiogenic capacity of extravillous trophoblasts by H19/miR-106a-5p/VEGFA axis.
Zeng Hong,He Dongmei,Xie Hebin,Zhao Yuhao,Peng Zhaoqun,Deng Huan,Hu Jinyue,Jiang Binyuan,Liu Nenghui
Archives of gynecology and obstetrics
PURPOSE:To investigate the role and underlying mechanism of H19 in regulating angiogenic capacity of extravillous trophoblasts. METHODS:Gain and loss of function experiments were performed using a human first-trimester extravillous trophoblast (EVT) cell line, HTR-8/SVneo cells. H19 was overexpressed or knocked down in HTR-8 cells by transfecting plasmid harboring whole-length H19 sequence (pH19) or siRNA specially targeting H19, respectively (siH19). Cell migration and tube-formation assay were assessed in the indicated groups. Gene expression was detected by RT-qPCR, Western blot, and ELISA assay. RESULTS:Overexpression of H19 in EVT cells increased cell migration and tube formation, while downregulation of H19 in EVT cells decreased cell migration and tube formation. Furthermore, we found that H19 played its role by VEGFA. In addition, we demonstrated the H19/miR-106a-5p/VEGFA regulatory axis in EVT. Experiments of the clinical specimen showed that H19 was very abundantly expressed in human first-trimester trophoblasts, and we found that the expression of H19 and VEGFA were significantly downregulated in the villous tissues from idiopathic recurrent miscarriage (RM) patients; moreover, the expression of H19 and VEGFA was positively correlated. CONCLUSION:H19/miR-106a-5p/VEGFA axis plays a role in regulating the angiogenic capacity of EVT, which might contribute to idiopathic RM.