alexa Soluble HLA-G is an independent factor for the prediction of pregnancy outcome after ART: a German multi-centre study.
Bioinformatics & Systems Biology

Bioinformatics & Systems Biology

Journal of Proteomics & Bioinformatics

Author(s): Rebmann V, Switala M, Eue I, GrosseWilde H

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Abstract BACKGROUND: Soluble HLA-G (sHLA-G) has been suggested as a non-invasive marker for embryo selection to improve pregnancy rates after assisted reproduction technique (ART). Our study aimed at the identification of parameters influencing the detection of sHLA-G in embryo cultures (ECs) and at the prognostic relevance of sHLA-G in a multi-centre study. METHODS: In total 4212 EC from 2364 cycles were randomly collected from 29 German ART centres and analysed for sHLA-G by Luminex-based technology. RESULTS: Among test and culture conditions, only the cleavage stage of the embryo was identified as an independent factor for sHLA-G detection (P < 0.001). Overall, sHLA-G was significantly associated with pregnancy after ART [P < 0.001; odds ratio: 2.0 (95\% CI: 1.7-2.4)], suggesting that sHLA-G testing might improve the pregnancy rate from 30 to 40\%. Importantly, the sHLA-G status of embryos could be associated with pregnancy after single embryo transfer [P = 0.002; odds ratio: 3.3 (95\% CI: 1.5-6.8)] doubling the probability of pregnancy rate to 26\% after sHLA-G testing. The patient's age, number of transferred embryos, morphological grading [EXP(B): 4.3 (95\% CI: 2.1-8.9)] of embryos and sHLA-G status [EXP(B): 2.3 (95\% CI: 1.8-3.1)] were independent predictors of pregnancy, with the latter two being most powerful. CONCLUSIONS: This study provides significant evidence that the morphological scoring system is still the best strategy for the selection of embryos but that sHLA-G might be considered as a second parameter if a choice has to be made between embryos of morphologically equal quality. This article was published in Hum Reprod and referenced in Journal of Proteomics & Bioinformatics

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