Objective: To assess the value of non-invasive prenatal testing (NIPT) for the identification of fetal chromosomal aneuploidies. Methods: For 9470 pregnant women with a moderate-to-high risk by conventional serological screening or advanced maternal age, peripheral venous blood samples were collected and, following extraction of free fetal DNA, subjected to large-scale parallel sequencing on a Illumina Hiseq2000 platform. Those with a high risk by NIPT were validated by invasive prenatal diagnosis. Results: Out of the 9470 samples, 194 cases (2.0%) were positive by NIPT testing. These included 50 trisomy 21, 11 trisomy 18, 17 trisomy 13, 44 other autosomal aneuploidies, 55 sex chromosomal aneuploidies, and 17 chromosomal copy number variations. As validated by amniotic fluid or umbilical blood chromosomal karyotyping analysis, NIPT has a false positive rate of 2.0%, 18.2%, 41.2%, 97.7%, 81.8%, 94.1%, respectively. The test has a sensitivity of 100% and a specificity of 98.79%. Conclusion For common chromosomal aneuploidies such as trisomy 21 and trisomy 18, NIPT has a good sensitivity and specificity, therefore has good value for clinical application.

OBJECTIVETo assess the value of combined chromosomal karyotyping and BACs-on-Beads(BoBs) assay for the prenatal diagnosis of high risk gravida from Ningbo.

METHODSFor 2779 women, results of conventional karyotyping analysis and BoBs assay were compared.

RESULTSFor common aneuploidies involving chromosomes 13, 18, 21, X and Y, the two methods have yielded a concordance rate of 98.78%. Eight cases detected with microduplication by BoBs were missed by karyotyping analysis. On the other hand, 17 structural chromosomal abnormalities, 10 chimeras and 1 triploidy detected by karyotyping analysis were missed by BoBs.

CONCLUSIONThe BoBs technology has featured high throughput and rapidity, and can detect 9 microdeletion syndromes, which can improve the quality of prenatal diagnosis and provide an ideal complementary for conventional chromosomal karyotyping.

Adult ; Chromosome Aberrations ; Chromosome Deletion ; Chromosomes, Artificial, Bacterial ; genetics ; Female ; Humans ; Karyotyping ; methods ; Pregnancy ; Prenatal Diagnosis ; methods

OBJECTIVE: To carry out genetic testing for a XXY fetus suggested by non-invasive prenatal testing (NIPT). METHODS: G-banding karyotyping, fluorescence in situ hybridization (FISH) and chromosomal microarray analysis (CMA) were performed on amniocytes from the fetus. The genitalia of the fetus was also examined by Doppler ultrasonography. The result was verified with peripheral blood samples from its parents and a brother. RESULTS: The fetus was found to have a 46,XX karyotype. CMA showed presence of sequences from Yp11.2 (2.635 Mb) and Yp11.31p11.2 (3.706 Mb). FISH assay suggested that the SRY fragment on Yp has translocated to Xpter. No karyotypic or pathogenic CNVs was detected in its parents and brother. The fetus was ultimately diagnosed with 46,XX (SRY positive) male syndrome. CONCLUSION The combination of G-banding karyotyping, FISH, and CMA is of great significance for attaining accurate prenatal diagnosis for this fetus.

This study was aimed to evaluate the clinical effect and safety of Qing-Fei Tong-Luo (QFTL) ointment for treating children with pneumonia.Randomized controlled trial (RCT) was conducted among 460 cases of children with pneumonia.The observation group was given QFTL ointment combined with basic treatment.And the control group was only treated by basic treatment.Evaluation was given on the total clinical efficacy,disappeared time of fever,cough,expectoration,shortness of breath,and medication safety.The incidence of respiratory diseases was followed up on the 30th days after drug withdrawal.The results showed that in the aspect of clinical efficacy between two groups,the cure rate of the observation group was 98.26％,and that of the control group was 93.89％,with statistic significance (P ＜ 0.05).The cure rate of the observation group was better than that of the control group.There was statistical difference on expectoration disappeared time (P ＜ 0.05).There was no statistical difference on disappeared time of fever,cough and shortness of breath (P ＞ 0.05).There was statistical difference on the incidence of respiratory diseases on the 30th days followed-up after drug withdrawal (P ＜ 0.05).There was no statistical difference on the incidence of upper respiratory tract infection,pneumonia and asthma (P ＞ 0.05).No adverse reactions occurred in the observation group.It was concluded that QFTL ointment combined with basic therapy on the treatment of pneumonia in children was significantly better than the control group in the aspect of clinical efficacy,expectoration disappeared time and the incidence of bronchitis.It is safe and effective.The prognosis is good and worthy of promotion in the clinical practice.