Objective To discuss the CT features of mediastinal teratoma.Methods 35 patients with mediastinal teratoma confirmed by clinical and pathologic data were retrospectively analyzed.Results Most mediastinal teratomas(97.1%) were localized in the middle or upper area of anterior mediastinum.Mediastinal teratoma included cystic teratoma(60.0%) and solid teratoma(40.0%).All kinds of tissues could be found in the tumors.CT features of cystic teratoma(n=21) were the cystic mass with fluid density,most of them(n=19) had the characteristics of "obviouswalled cysts".CT features of solid teratoma(n=14) were the soft-tissue mass with mixed densities.CT features of malignant teratoma(n=5) were that the layer of fatty tissue between the tumor and the surrounding structures disappeared,and that the wall of neighbour vessels were mostly or all surrounded by the tumor.Mediastinal teratoma could cause pleural offusion(n=6) and pericardial offusion(n=12).Conclusion Mediastinal teratomas have obvious CT imaging features.CT has very important value in the diagnosis and differential diagnosis of mediastinal teratoma.

Objective To explore the therapeutic effect of Yupingfeng powder in secondary immunodeficiency caused by simple nephrotic syndrome(SNS) in children.Methods Seventy-eight cases of SNS patients were divided into 2 groups randomly.One was control group which were treated with immunosuppressant only.The other group was Yupingfeng powder group which were treated with both immunosuppressant and Yupingfeng powder.The morbidity of infection,the relapse rate of SNS,and serum immunoglobulin IgA and IgG and the T-lymphocytes subtype were detected before and after treatment in two groups.Results The morbidity with infection was 55.3% in Yupingfeng powder group,which shows a remarkable decrease compared with control group(85%).The relapse rate of SNS was 39.5% in Yupingfeng powder group which was much lower than that in control group(67.5%).The level of serum IgA and IgG before treatment were(3.88?1.22) g/L and(0.83?0.14) g/L and rose up to(10.06?1.89) g/L and(1.38?0.10) g/L after treatment in Yupingfeng powder group.Whereas the control group with(6.23?1.55) g/L and(0.85?0.13) g/L was remarkably lower than those in Yupingfeng powder group.CD4+,CD8+ and the ratio of CD4+/CD8+ were(37.91?3.89)%,(30.69?3.08)% and(1.24?0.49)% respectively before treatment.They rose up to(42.38?4.89)%,(26.01?2.20)% and(1.63?0.41)% respectively in Yupingfeng powder group,while those in control group were(39.87?3.91)%,(29.76?3.55)% and(1.34?0.24)% respectively after treatment.Conclusion It is feasible to treat the Yupingfeng powder to cure the of secondary immunodeficiency caused by SNS in children.

Purpose To establish a golden hamster model of intrahepatic cholangiocarcinoma (ICC) using BOP [N-nitrosobis (2-oxo-propyl) amine] and to explore the protein expression of Wisp-1,β-catenin, TGF-β1 and Smad4 in ICC and their relationship with the tumorigenesis. Methods 57 female golden hamsters aged 8 to 9 weeks (39 in experimental group, 18 in control group), the experi-mental animals were subjected to subcutaneous injection of BOP, the control group was injected with saline. The liver was removed and paraffin sections were prepared for histopathological observation. The protein expression of Wisp-1,β-catenin, TGF-β1 and Smad4 was detected by immunohistochemistry (IHC) in these blocks. Results Most of the animals in the experimental group (29/39) developed ICC, part of the animal (8/39) developed bile duct dysplasia, 1 developed focal bile duct hyperplasia, and 1 was not found bile duct hyperplasia. The positive expression rates of four protein markers in ICC, bile duct dysplasia and normal intrahepatic bile duct tissues were Wisp-1,79. 3%, 87. 5% and 5. 0%,β-catenin, 96. 6%, 100. 0% and 15. 0%, Smad4, 96. 6%, 100. 0% and 25. 0%, TGF-β1, 62. 1%, 12. 5% and 5. 0%, respectively. The positive expression rates of Wisp-1, beta-catenin and Smad4 protein in both the ICC and the tissue of bile duct dysplasia were higher than that of normal intrahepatic bile duct tissue ( P<0. 001 ) , The positive ex-pression of TGF-β1 in the ICC tissue was higher than that of normal intrahepatic bile duct tissue and bile duct dysplasia (P<0. 001). Conclusions The study showed that BOP can induce a golden hamster model of ICC and provides a reliable animal model for the study of ICC. The high expression of Wisp-1,β-catenin, TGF-β1 and Smad4 in BOP-induced intrahepatic cholangiocarcinoma is closely re-lated to occurrence, development and infiltration of ICC.

Objective To investigate the effects of pneumonia on gastroesophageal reflux(GER)of neonates.Methods The distal 24 h esophageal pH monitoring was performed in 30 neonates with pneumonia and 30 controls.The number of reflux episodes,the number of refluxover 5 min,the longest time of reflux,the total time of pH

Dengue virus (DENV) is a re-emerging disease transmitted by the Aedes mosquitoes and has become a major public health problem in southern China. Currently, no antiviral drug or effective vaccine exist to control this disease. The chimeric DENV structural protein vaccine cannot elicit balanced levels of protective immunity to each of the four viral serotypes; therefore, non-structural protein components may be required to construct an effective DENV vaccine. The Dengue virus non-structural 1 (DENV NS1) protein plays a critical role in viral pathogenesis and protective immunity. Therefore, immunity to Dengue 1-4 NS1 subtypes may be crucial for the prevention of severe disease. This review attempts to provide an overview about the structure and function of DENV NS1.
Animals ; Dengue ; immunology ; prevention & control ; virology ; Dengue Vaccines ; chemistry ; genetics ; immunology ; Dengue Virus ; chemistry ; genetics ; immunology ; Humans ; Viral Nonstructural Proteins ; chemistry ; genetics ; immunology

Diving ; Humans ; Otitis Externa ; prevention & control

Transforming growth factor-?_1 (TGF-?_) mRNA or protein expression in renal cortex of diabetic rats was assessed by real-time quantitative RT-PCR with SYBR Green,immunohistochemistry or Western blot.After melatonin treatment,the expressions of TGF-?_1 mRNA and protein were decreased,suggesting that beneficial effect of melatonin may result from its antioxidative property and inhibiting TGF-?_1 expressions.

Objective: To study the effects of long chain PUFA, AA and/or DHA on the fatty acid composition, growth and development of the newborn rats hippocampal neurons in culture. Methods: The primary culture of the hippocampal neurons was carried out in vitro by using serum free medium and supplementing 4 ? mol/L AA, DHA, or AA and DHA, of which the total concentration were 4 ?mol/L, the ratios of AA∶DHA from 1∶2 to 16∶1, in medium. The hippocampal neuronal fatty acid composition was analyzed by gas chromatogram, and the neuronal size and length of hippocampal neurite were measured by image analysis. Results: There were significant positive correlations between the ratios AA∶DHA in medium and the AA percentage and the ratios AA∶DHA in hippocampal neurons. The soma area? body maximum? minimum diameter and process length of hippocampal neurons in the group, which the total concentration of AA and DHA was 4 ?mol/L, and the ratio AA∶DHA in medium was 2∶1 or 4∶1,were higher significantly than other groups and groups with other ratios of AA∶DHA. Conclusion: AA and DHA could promote the growth and development of hippocampal neurons in culture..

To explore the diagnostic values of miRNA141 and miRNA375 for prostate cancer.The expressions of miRNA141 and miRNA375 in serum samples from 30 prostate cancer (PCA) patients,40 benign prostatic hyperplasia patients and 50 normal controls were detected by quantitative reverse transcription-polymerase chain reaction (qRT-PCR).The expression of miRNA141 in tissue samples from prostate cancer was 13.4±7.2 folds of that from benign prostatic hyperplasia while the expression of miRNA375 in tissue samples from prostate cancer was 28.4 ± 10.3 folds of that from benign prostatic hyperplasia.The differential expression of miRNA141 and miRNA375 in sera of prostate cancer suggested that miRNA141 and miRNA375 might be potential tumor markers in clinical practice.

AIM: To explore the effect of pulmonary arterial smooth muscle cell (PASMC) apoptosis on the reversal of hypoxic pulmonary arterial remodeling during reoxygenation and its possible mechanism.METHODS: Male SD rats (n=24) were randomly divided into normoxia for 4 weeks group, hypoxia for 4 weeks group, reoxygenation for 1 week after hypoxia for 4 weeks group and reoxygenation for 6 weeks after hypoxia for 4 weeks group.Right ventricular systolic pressure (RVSP), right ventricular hypertrophy index, pulmonary arterial medial thickness (MT) and medial area (MA) as well as autophagy and apoptosis in the pulmonary arterial medial layer were examined during hypoxia-reoxygenation.The rat primary PASMCs were divided into normoxia for 48 h group, hypoxia for 48 h group, reoxygenation for 24 h after hypoxia for 48 h group and normoxia for 72 h group to explore the changes of PASMC autophagy and apoptosis following hypoxia-reoxygenation.Finally, primary PASMCs were divided into normoxia for 72 h group, reoxygenation for 24 h after hypoxia for 48 h group and reoxygenation for 24 h after hypoxia for 48 h + chloroquine (inhibitor of autophagy) group to investigate the effect of PASMC autophagy during hypoxia on the apoptosis during reoxygenation.RESULTS: After hypoxia for 4 weeks, the RVSP, during right ventricular hypertrophy index, MT and MA increased significantly compared with normoxia group (P<0.05), and gradually decreased during reoxygenation.The expression of LC3 in the pulmonary arterial medial layer increased evidently after hypoxia and gradually reversed during reoxygenation.Moreover, the P62 and cleaved caspase-3 expression decreased after hypoxia compared with normoxia group, and increased markedly following reoxyge-nation.The expression of cleaved caspase-3/PARP in rat primary PASMCs decreased significantly under hypoxia (P<0.05), and increased evidently during reoxygenation.The expression of P62 and LC3-II decreased markedly under hypoxia (P<0.05).After inhibition of PASMC autophagy under hypoxia, the expression of cleaved caspase-3/PARP decreased remarkably during reoxygenation (P<0.05).CONCLUSION: The PASMC apoptosis participates in the reversal of hypoxic pulmonary arterial remodeling, and the PASMC autophagy under hypoxia might facilitate its apoptosis during reoxygenation.