Verification of foetal Down syndrome biomarker proteins in maternal plasma and applications in prenatal screening for Down syndrome

Background Down Syndrome (DS) has a very high morbidity, according to statistics, the incidence rate of DS is as high as 1:700 among the new born babies. At present, there are still no effective prevention or treatment methods for the disease. We used a Western Blot technique to validate differentially expressed proteins between DS foetal umbilical cord blood plasma and healthy foetal peripheral blood plasma from pregnant women to identify new prenatal diagnostic biomarkers for down syndrome (DS) and establish a new non-invasive prenatal diagnosis method.