The Relationship between HLA-G Gene Polymorphisms and Repeated Implantation Failure in Infertile Couples Undergoing Assisted Reproductive Technique

Tehran University of Medical Sciences Iranian Journal of Allergy, Asthma and Immunology 1735-1502 14 5 2015 10 20 The Relationship between HLA-G Gene Polymorphisms and Repeated Implantation Failure in Infertile Couples Undergoing Assisted Reproductive Technique 535 542 EN Zahra Kuroshli Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute, ACECR, Tehran, Iran AND Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran. Hamid Gourabi Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute, ACECR, Tehran, Iran. Masood Bazrgar Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute, ACECR, Tehran, Iran. Mohammad Hossein Sanati Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute, ACECR, Tehran, Iran AND Department of Medical Genetics, National Institute of Genetic Engineering and Biotechnology, Tehran, Iran. Masoud Zamani Esteki Centre for Human Genetics, University Hospital Leuven & Department of Human Genetics, KU Leuven, Belgium. 2015 10 19 2015 10 19 HLA-G is a tolerogenic molecule that expresses in cytotrophoblast cells and plays an important role in immune response suppression in maternal decidua. Interactions between the extracellular domains of the HLA-G protein with cell receptors of the immune system are well-known.This study investigated the association between HLA-G gene polymorphism with repeated implantation failure (RIF). We used PCR followed by the sequencing technique for exons 2, 3, and 4, as well as intron 2 of the HLA-G gene in 100 couples with histories of two or more failed assisted reproductive technique (ART) attempts. The data were compared with the results of our previous study.The results indicated that some alleles of the HLA-G gene such as: 0106, 010106, 01010106 and 0105N (null) alleles were significantly higher in the patient group compared to the control group (p<0.05). There were higher SNPs at the +482 T/C and +506 -/C positions in failed ART couples compared to controls (p=0.03; p=0.01, respectively).HLA-G gene polymorphisms do not clearly affect the risk for implantation failure in most couples who undergo ART. However allelic variations, particularly in exons 3 and 4, and intron 2 of the HLA-G gene can lead to ART failure in human embryos. https://ijaai.tums.ac.ir/index.php/ijaai/article/view/602 https://ijaai.tums.ac.ir/index.php/ijaai/article/download/602/567