Laboratory of cellular reproductive technologies of "Children's city clinical hospital №1"
Author list of organization
List of articles written by the authors of the organization
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Description
The research shows the possibility of extended preimplantation genetic screening (PGD) that allows to improve the strategy of selection of embryos that satisfies not only the requirement of the absence of chromosomal abnormalities, but also includes their additional check for predisposition to various diseases, as well as the choice of the embryo with the most optimal HLA haplotype in cases with expressed compatibility of parents for HLA-genes
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SELECTION OF FETAL CELLS CIRCULATING IN MATERNAL BLOOD FOR NONINVASIVE PRENATAL DIAGNOSIS
Description
Trophoblast cells circulating in maternal blood may serve as potential sources of genetic information for screening in obstetric practice approaches to noninvasive prenatal diagnosis. The material for the study was whole blood of pregnant women of gestational ages of 8-12 weeks in a volume of 10 ml. stabilized with heparin. Enrichment was performed by the method of gradient centrifugation and magnetic separation (CD45–) with fluorescent staining negative fractions labeled with antibodies to antigens of trophoblasts (HLA-G, and Trop-2) to conduct flow cytometry and sorting of cells on glass slides. Single cell candidates using laser micro dissection were transferred into a vial for subsequent whole-genome amplification, providing sufficient representativeness of their genome. Fetal origin of the genetic material was confirmed by comparison of alleles of the HLA genes of the parents and cells candidates. It is possible to improve significantly the accuracy and versatility of non-invasive prenatal diagnosis using comparative genomic hybridization using chips (аCGH)
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Description
Isolation of fetal cells from the blood of a pregnant woman is more relevant for receiving the information of the genome of a fetus and implementation in clinical practice, non-invasive screening methods for prenatal diagnosis. The work proposes efficient ways of sorting trophoblasts circulating in maternal blood for the diagnosis of fetal aneuploidy in early gestation by analyzing microsatellite marker of the chromosomes that most prone to numerical aberrations (13, 18, 21, X and Y). A set of microsatellite markers allowed to reveal aneuploidy in three pregnant women, and also to exclude mosaicism and contamination of samples with maternal cells. A retrospective analysis of data on invasive cytogenetic studies (chorionic villus sampling) confirmed the results of the study
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