Objective To explore the value of non-invasive prenatal test (NIPT) in pregnant women with intermediate risk after traditional Down syndrome screening. Methods From March 1 2015 to March 31 2016, a total of 2 949 pregnant women with intermediate risk after traditional Down syndrome screening who received NIPT as the second-line screening method at Shenzhen Maternity and Child Healthcare Hospital after informed consent were recruited for this study. Retrospective data analysis including the results of traditional Down syndrome screening, ultrasound, NIPT and invasive amniocentesis to fetal karyotype analysis were conducted, and pregnant outcomes were followed up. Results NIPT results were all obtained in 2 949 pregnant women with intermediate risk after traditional Down syndrome screening. Of 25 NIPT-positive cases, 24 cases received invasive amniocentesis to fetal karyotype analysis. Thirteen cases were confirmed with fetal chromosomal abnormalities including 5 cases of trisomy 21, 2 cases of trisomy 13, 4 cases of sex chromosomal abnormalities and 2 cases of other chromosomal abnormalities. In addition, 1 NIPT-positive case refused prenatal diagnosis was confirmed normal result after birth. The postnatal follow-up in NIPT-negative women did not find any newborn with chromosomal abnormality. The incidence of fetal chromosomal abnormalities in women with intermediate risk was 0.44% (13/2 949). Conclusion NIPT can be used as second-line screening method in pregnant women with intermediate risk after Down syndrome screening, which could lead to the prenatal detection of a higher proportion of fetal chromosomal abnormalities and a lower invasive-testing rate.

Aim To evaluate the antianginal efficacy of trimetazidine in combination with other regular anti-ischemic drugs in the treatment of stable angina. Methods Twenty-two male cases with stable,effort-induced angina and positive exercise ECG test were treated with trimetazidine for 12 weeks.Exercise ECG test was examined again in the end of the study. Results There were obviously increased in exercise tolerance,total exercise workload after treatment(P

Mitochondrial dysfunction has been implicated in the aetiology of sporadic Parkinson's disease but its role in the disease mechanism remains unclear.To investigate the effect of synuclein on mitochondrial dysfunction induced by rotenone.The human dopaminergic SH-SY5Y cells were used as a cell model.The cells over-expressed the wild-type ?-synuclein were treated with complex I inhibitor rotenone.The cell viability,complex I activity,Mitochondrial swelling and O2-content were tested at different time point-1w,2w,4w after rotenone treated.CCK-8 test results showed that the cell viability of overexpressed ?-synuclein(SH-SY5Y-Syn)was much lower than the control group(SH-SY5Y-Ctr).After administrating with rotenone about 1w or 2w the cell viability of SH-SY5Y-Syn became higher than that of SH-SY5Y-Ctr.On the 4th week the results were contrary to the first 2 weeks.Similar results were got when test the mitochondrial function.In the first 2 weeks after roteoone administrating,the mitochondrial function of SH-SY5Y-Syn was better than that of SH-SY5Y-Ctr.This suggest that the ?-synuclein could protect the mitochondrial against the injury induced by rotenone in the early stage-1w,2w,while this effect disappeared in the final stage-4w.

Objective:To identify the effect of ?-synuclein overexpression on mitochondrial membrane structure with atomic force microscopy. Methods:?-syn expression was mediated by AAV (adeno-associated viral vector) and Recombinant AAV/?-syn and AAV/LacZ viral particles were stereotaxically injected in the left side of rat substantia nigra (SN) for rat model of ?-synuclein overexpression. Mitochondria were isolated from rats SN of Brain. Mitochondria were analysis with JC-1 staining,atomic force microscopy and Western blot. Results:By 16 weeks post-infection of AAV-?-syn,the level of ?-syn increased about 2 times in mitochondrial fraction with Western blot and mitochondrial membrane potential (??) decreased with JC-1 staining. Furthermore,mitochondria swelling and porous like structure formed on the mitochondrial membrane with atomic force microscopy. Conclusion:The data suggested that ?-syn could accumulate in mitochondria,might form mitochondrial membrane pores and lead to ?? decreases. ?-syn might lead to mitochondrial dysfunction in Parkinson's disease.

Objective To determine the treatment effect of cesarean scar pregnancy (CSP) and provide theoretical guidance in selecting proper treatment for this disease. Methods Sixty-two patients were randomly divided into 2 groups taken uterine artery embolization combines uterine curettage (combination group,n = 32) and gynaecologic surgery (surgery group, n = 30) respectively. The operation time, blood loss, intraoperative fluid volume, uterine retention rate, hospitalization days and medical expense of two groups were recorded and compared.The complication occurrence of both short-term and long-term was observed, and the results in two groups were compared. Long term and short term occurrence of complications were also observed. Results No significant difference in preoperative indicators was found between two groups, includes average age, menopause time, blood β-HCG value,gestational sac diameter,the amount of vaginal bleeding (P ＞ 0. 05 ). But after the operation,we found significant difference between the combination group and surgical group in uterine retention rates (96.9% (31/32)and 20.0% (6/30) respectively, P ＜ 0. 01 ). The significant differences were also observed in operative time (42. 0 ±13.2) min and ( 120.0 ± 34.5 ) min respectively, P ＜ 0. 001 ); average hospitalization days ( (7.0 ± 1.0)days and ( 15.0 ± 2.0) days respectively, P ＜ 0. 001 ); medical expense ( $ 9143.5 ± 864.3 and $ 11 371.7 ±1621.0 respectively, P ＜ 0. 001 ) between the combination group and surgical group. During hospitalization,complication occurred in 1 case in combination group and in 7 cases in surgery group, of which mild complications were seen in 6 and serious complication in 1 patient. No treatment-related complications occurred in long-term observation in neither of the groups. The complication occurrence in combination group and surgery group were 3.1%(1/32) and 23.3% (7/30) respectively ,with a significant difference between two groups (P ＜ 0.01 ). Conclusions In the treatment of cesarean scar pregnancy, the uterine artery embolization combines uterine curettage therapy is superior to gynaecologic surgery for its shorter operative time, less infusion quantity, higher uterine retention rate,fewer complications, shorter time of hospitalization, less medical expense and better security.

Objective:To establish a method for the determination of omeprazole delayed release capsules and investigate the be-havior of reference preparations to provide experimental basis for generic drugs quality consistency evaluation. Methods:According to the first dissolution method (basket method) stated in 0. 931 of Chinese Pharmacopeia (2015 edition), the type of release media, solu-bility and stability of omeprazole in different media, effect of different treatment methods on the drug adsorption in the solution, differ-ent rotation speed and the methodology of ultraviolet spectrophotometry were investigated. Results:The rotation speed was 75 r·min-1 with the dissolution medium volume of 900 ml. The dissolution profiles of omeprazole delayed release capsules in three different media ( pH 6. 0 phosphate buffer, pH 6. 8 phosphate buffer and water containing 3% Tween-80) were determined with online filteration. The solubility of omeprazole in the different media was 0. 123, 0. 078 and 0. 275 mg·ml-1 , respectively. The results showed that ome-prazole was degraded 44%, 8% and 14% in 2 h in the above three release media, and degraded up to 43% in 6 h in water containing 3% Tween-80. The linear of omeprazole was 0. 209 4-20. 94, 0. 204 8-20. 48 and 0. 2016-20. 16 μg·ml-1 with the average recovery of 99.3% (RSD=0.7%,n=12), 99.7% (RSD=0.9%,n=12) and 99.5% (RSD=0.6%,n=12) respectively in the three media. Conclusion:The method is accurate and reliable, which can be used to study the quality consistency of omeprazole delayed re-lease capsules.

Objectives Todynamicallyobservethechangesofhemodynamicparametersinpatients with severe stenosis of unilateral middle cerebral artery (MCA)by transcranial Doppler ultrasound (TCD) andtoevaluateandanalyzetherelatedfactorsforinfluencingthestenoticprocess.Methods Atotalof 113 consecutive patients with severe stenosis of unilateral MCA screened by TCD and confirmed by computed tomography angiography (CTA)and digital subtraction angiography (DSA)were enrolled retrospectively. They were divided into either a progressive group (n =43 )or a non-progressive group (n=90)according to the variation of MCA hemodynamic parameters. The effects of age,sex,major risk factors for cerebrovascular disease,clinical symptoms,clinical medication,and drug compliance on the stenotic process were documented and analyzed. Results (1)The comparison of detection rate of the risk factors for cerebrovascular disease:The patients with a history of smoking (72. 1%[n=31])in the progressive group was significantly higher than that (51. 1%[n=46])in the non-progressive group (P=0.022). The period of smoking of the patients in the progressive group were longer than that in the non-progressive group (28 ± 12 years vs. 21 ± 10 years,P=0. 011). (2)Comparison of MCA hemodynamic parameters:The distal pulsatility indexes of MCA stenosis at the first diagnosis in the progressive group were all lower than those in the non-progressive group (0. 66 ± 0. 10 vs. 0. 70 ± 0. 13;t= -2. 096,P=0. 038),and the distal pulsatility indexes of MCA stenosis at the end point in the patients of the progressive group were lower than those in the non-progressive group (0. 61 ± 0. 15 vs. 0. 74 ± 0. 15). There were significant differences (t=-2. 718,P= 0. 008). The peak systolic velocity (PSV)of the progressive MCA stenotic segments at the end point in 10 patients of the progressive group was higher than that in the non-progressive group (299 ± 23 cm/s vs. 244 ± 50 cm/s,t=3. 437;P=0. 001),while PSV of MCA in 33 patients with occlusion in the progressive group were significantly lower than those in the non-progressive group (56 ± 18 cm/s vs. 244 ± 50 cm/s,t= -20. 905;P=0. 000). (3)The regular medication:The patients using statins (atorvastatin calcium)were significantly lower than those of the non-progressive group (2. 3%[n=1] vs. 54. 4%[n=49],χ2 =33. 690;P<0. 01). (4)During the follow up period,the recurrence rates of transient ischemic attack and stroke of the progressive group were significantly higher than those of the non-progressive group (27. 9%[n=12]vs. 6. 7%[n=6],32. 6%[n=14]vs. 2. 2%[n=2];all P<0.01). (5)Multivariate Logistic regression analysis showed that smokers (OR,4. 403,95%CI 1. 094-14.017),cerebrovascular event recurrence (OR,10. 648,95%CI 2. 530 -41. 261),and irregularly taking statins (OR,5. 675,95%CI 1. 631-152. 740)were all closely associated with the progress of severeMCAstenosis.Conclusion EvaluationofthehemodynamicchangesofsevereMCAstenosiswith TCD follow up study can be used as an important basis for clinical assessment of the outcomes. Stop smoking and regularly taking statins may help to delay the progress of MCA stenosis.

Objective:To study the effect of Ginkgo biloba extract (EGb761) on metabolism of aflatoxin B_1(AFB_1) in Wistar rats. Methods:Seventy one Wistar rats were divided into three groups at random: group A (AFB_1 group), group B (AFB_1+EGb761 group), and group C (control group). The rats in groups A and B were given AFB_1(intraperitoneal injection, 100-200 μg/ kg body weight, 1-3 times/week). The rats in group B were fed the food containing EGb761 while the rats in groups A and C were given normal food. Blood samples were collected and liver biopsy was performed on the 14th, 28th and 42nd week. All the rats were sacrificed at the 64th week. The incidence of hepatoma was observed. The hepatic phase Ⅰ drug-metabolizing enzyme CYP450 and phase Ⅱ enzyme GST were detected by spectrometry. The serum AFB_1-lysine adduct was determined by high performance liquid chromatography (HPLC). The expression of 8-hydroxydeoxyguanosine(8-OHdG) was measured by immunohistochemistry. Results:The incidence of hepatocellular carcinoma (HCC) in group B was significantly lower than that in group A (26.92% vs 76.00%,P<0.001). No hepatocellular carcinoma developed in group C. EGb761 had no effects on the activities of CYP450 and GST in rat liver tissues. The level of AFB_1-lysine adduct reached the peak (4 356.01 pg/mg albumin) at the 14th week in group A. EGb761 significantly inhibited the formation of AFB_1-lysine adducts in serum by 13.07% at the 14th week (P＝0.033), and 73.63% at the 42nd week (P＝0.002). The expression of 8-OHdG protein in rat liver tissues in group B was significantly lower than that in group A at the 28th, 42nd, and 64th week (P<0.05). Conclusion:The main mechanism underlying the effect of EGb761 in blocking hepatogenesis induced by AFB_1 may not be fully related with its influence on the activity of liver phase Ⅰ and phase Ⅱ metabolizing enzymes. EGb761 inhibites the production of AFB_1-lysine addcuts, decreases the expression of 8-OHdG protein, and finally alleviates the DNA oxidative injury, which may be one of the mechanisms for the effects of EGb761 in inhibiting or delaying hepatogenesis induced by AFB_1.

Objective To observe the influence of simulated microgravity on rat islet. Methods Isolated islet were assigned to flask-culture or bioreactor-culture. Gross structure and ultrastructure of islet were observed by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). Results Islets ultrastructure on 7th day in bioreactor closely resembled fresh islets,with well-formed secretory granules and abundant mitochondria. SEM showed under microgravity islets communicating each other with cavity-like areas. Conclusions The ultrastructure of islets cultured under microgravity closely resembled fresh islets.

OBJECTIVETo study the autophagy activity between rat bone marrow stem cells (BMSCs) neural differentiation in order to explore the mechanism involve in this process.

METHODSBMSCs were passed by 3 generation, then was induced with the revulsant 2% (DMSO) + 200 µmol/L (BHA), NSE expression was detected by immunocytochemical stain, the mRNA expression of autophagy associated genes L3B, Beclinl, Atg5, Atg7, Atg10 were detected by RT-PCR, the autophagy protein LC3B was examined by Western blot and flow cytometry analysis.

RESULTSBMSCs were passed by 3 generation, the purity of BMSCs could reach more than 90%, the morphology of cells were like fibroblasts, after the revulsant 2% DMSO + 200 µmol/L BRA induced, cells were extended long neurites, like nerve cells, positive rate of NSE staining was (83±5) %, RT-PCR results showed that the expression of autophagy associated genes LC3B, Beclinl, Atg5, Atg7 Atg0 were rised after BMSCs neural differentiation, Western blot analysis showed that the LC3B-II protein expression was increased after neural differentiation and the MFI of L3B was highten by flow cytometry.

CONCLUSIONAutophagy is increased after rat BMSC neural differentiation.

Animals ; Autophagy ; Cell Differentiation ; Cells, Cultured ; Flow Cytometry ; Mesenchymal Stromal Cells ; cytology ; Neurons ; cytology ; Rats