Noninvasive Prenatal Diagnostics: Recent Developments Using Circulating Fetal Nucleated Cells

AbstractPurpose of ReviewThe purpose of this review is to highlight recent research advances in noninvasive prenatal diagnostic methods.Recent FindingsRecent studies developing noninvasive prenatal diagnostic (NIPD) methods have been focused on either fetal nucleated red blood cells (fNRBCs) or circulating trophoblasts (cTBs). Enriched cTBs were successfully utilized for whole genome profiling and short tandem repeat (STR) identification to confirm feto-maternal relationship. However, further analysis of isolated fNRBCs remains confined to examining fetal cytogenetics.SummaryInvasive prenatal diagnostic procedures, amniocentesis, and chorionic villus sampling, are the gold standard for the diagnosis of fetal chromosomal abnormalities and genetic disorders. Meanwhile, noninvasive techniques of analyzing circulating cell-free fetal DNA (cffDNA) have been limited to screening tools and are highly fragmented and confounded by maternal DNA. By detecting circulating fetal nucleated cells (CFNCs) we are able to noninvasively confirm fetal chromosomal abnormalities, truly realizing the concept of “noninvasive prenatal diagnostics”. The primary technical challenge is the enrichment of the low abundance of CFNCs in maternal peripheral blood. For any cell-based NIPD method, both fetal whole genome profiling and confirmation of the feto-parental relationship are essential. This has been succ essfully performed using enriched and isolated cTBs, making cTB a better candidate for NIPD. ...
Source: Current Obstetrics and Gynecology Reports - Category: OBGYN Source Type: research