Objective To assess the respective value and limitation of cardioangiography and ultrasonography in interventional therapy for congenital heart disease in children,and to discuss the clinical significance of the combined use of both examinations. Methods A total of 162 children with congenital heart disease,screened by ultrasonography,were enrolled in this study.The disorders included VSD(n=50),PDA(n=96)and PS(n=16).Before the interventional therapy all the cases accepted cardioangiography and ultrasonography examinations,and the diameter of the abnormal passage was measured.The difference in the diameter between two examinations was compared and statistically analyzed by using paired t test.All the cases accepted both examinations after the interventional therapy to check the location of the occluder and the result of balloon dilatation.Results Both cardiovascular angiography and ultrasonography could make a definite diagnosis of congenital bean disease in children,and could well display the location and shape of the abnormalities.The diameter of VSD(n=50)measured by cardioangiography and ultrasonography was(4.93±2.73)mm and(5.66±2.77)mm respectively,with no significant statistical difference existing between two methods(P＞0.05).The diameter at the narrowest site of PDA(n=96)measured by cardioangiography and ultrasonography was(3.22±1.45)mm and(3.96±1.42)mm respectively,with a significant difference existing between two methods(P＜0.05).In 16 PS cases,the diameter of valvular ring determined on cardioangiogram and on ultrasonogram wag(16.16±4.26)mm and(17.94±5.50)mm respectively,with no significant difference between two groups(P＞0.05).During the operation of VSD,the monitoring ultrasonography revealed that the valvular opening and closing was interfered by the occluder in 9 cases,so the occluder was re-adjusted till it was fixed to proper position. After the interventional therapy for VSD and PDA,cardioangiography detected a small residual shunt in 7 cases,which completely disappeared 24 hours later on ultrasonography.After balloon dilation in all 16 children with PS the right ventricle-pulmonary artery pressure difference was reduced by more than 50%and the pressure figure reached the standard of clinical Cure.The interventional procedure was successfully completed in all patients except for three cases. Conclusion In treating children of congenital heart disease with interventional procedures,the determination of the lesion's diameter and the selection of the occluder should be based on cardioangiographic measurement,although ultrasonography is more helpful in making preoperative screening and postoperative evaluation.

Objective To evaluate the efficacy and toxicity of the combination of gemcitabine and cisplatin in the treatment of patients with advanced non-small cell lung cancer (NSCLC). Methods A total of 30 cases of non-small cell lung cancer (stages Ⅲ and Ⅳ) were treated with gemcitabine (1 200 mg/m 2, iv infusion, at 1 and 8 d) and cisplatin (100 mg/m 2, iv infusion, at 1 d or cisplatin at 30 mg/m 2, iv infusion, at 1 and 8 d). The administration course was 28 d. Results An objective response was obtained in 46.67% of patients (2 complete and 12 partial responses), whereas 11 patients had no change and 5 patients were progressive. The response rate was 52.38% in patients with no prior chemotherapy and the response rate of 33.33% was achieved in patients who had been given prior treatment. There was significant difference between the two groups (P

Objective:Observing the effect of exosomes derived from hypoxic Bone marrow mesenchymal stem cells (BMSCs) on the function of chondrocytes, and exploring the role and mechanism of exosomal miR-196b-5p. Evaluating the application prospects of hypoxic BMSCs exosomes and miR-196b-5p for cartilage regeneration.Methods:Chondrocytes were cultured in the supernatant of BMSCs cultured under normoxia or hypoxia, respectively. The proliferation of chondrocytes was detected by CCK-8 assay and the expressions of Collagen type 2 (Col2), Col1, Aggrecan and SOX9 were detected by qPCR to evaluate the effect of hypoxic BMSCs paracrine on chondrocyte functions. Obtaining normoxic and hypoxic exosomes through ultracentrifugation, and testing their effects on the proliferation and anabolic-related genes of chondrocytes through CCK-8 assay and qPCR. Verifying the expression of miR-196b-5p in hypoxic exosomes based on exosomal miRNA array. Knocking out miR-196b-5p in hypoxic BMSCs, and detecting the effect of hypoxic exosomal miR-196b-5p on the functions of chondrocytes by loss-of-function assay. Predicting the downstream of miR-196b-5p through bioinformatics tools, and exploring the mechanism of hypoxic exosomal miR-196b-5p by gain-of-function assays. Hypoxic exosomes and miR-196b-5p-knockout hypoxic exosomes were loaded on silk fibroin hydrogel and subcutaneously into nude mice. After 4 weeks of culture, histological staining of saffron O, Masson and biochemical content of sGAG and collagen were performed to assess the application prospect of hypoxic exosomes and hypoxic exosomal miR-196b-5p on cartilage regeneration. Results:The results of CCK-8 assay and qPCR indicated that the supernatant of hypoxic BMSCs significantly promoted the proliferation of chondrocytes 1.20±0.07 and the expression of cartilage-related markers (Col2 2.95±0.17, Aggrecan 2.45±0.27, SOX9 2.92±0.29) compared to normoxic BMSCs (0.94±0.04, 1.89±0.09, 1.67±0.21, 1.76±0.16), the differences were statistically significant ( P<0.05). The result of CCK-8 assay showed that hypoxic exosomes (1.28±0.04) promoted the proliferation of chondrocytes compared to normoxic exosomes 1.05±0.06, the differences were statistically significant ( P<0.05). CCK-8 assay revealed that the down-regulation of miR-196b-5p in hypoxic exosomes 0.99±0.06 attenuated the proliferation of chondrocytes compared to control group 1.20±0.07, the differences were statistically significant ( P<0.05); the expression of Col2 0.56±0.04, Aggrecan 0.74±0.09, and SOX9 0.45±0.05 in chondrocytes was reduced in the miR-196b-5p knockdown group compared to the control group (1.00±0.09, 1.00±0.12, 1.00±0.07), the differences were statistically significant ( P<0.05). Co-transfection of pmirGLO-BACH1-WT reporter vector with miR-196b-5p mimics decreased the luciferase activity 0.73±0.06, the differences were statistically significant ( P<0.05). Co-transfection of pmirGLO-BACH1-MUT reporter vector with miR-196b-5p mimics showed no change in luciferase activity. BACH1 is the target of miR-196b-5p. Subcutaneous culture in nude mice showed that hypoxic exosomes significantly promoted the deposition of sGAG 383.2±21.54 and collagen 67.40±3.45, while reducing the expression of miR-196b-5p in hypoxic exosomes weakened the deposition of sGAG 258.4±19.50 and collagen 57.15±4.95, the differences were statistically significant ( P<0.05). Conclusion:Hypoxic exosomes promoted the functions of chondrocytes by inhibiting the expression of BACH1 through miR-196b-5p. Hypoxic exosomes can be applied in cartilage regeneration.