Chorionic Gonadotropin, beta Subunit, Human ; blood ; Down Syndrome ; blood ; diagnosis ; Female ; Humans ; Pregnancy ; Pregnancy, Twin ; Prenatal Diagnosis ; alpha-Fetoproteins ; metabolism

Medical imaging teaching depends on support from multimedia database which is constructed with image information provided by PACS/HIS ( Picture archiving and communication system/Hospital information system ).This paper evaluated construction,administration and application of the multimedia database,and illustrated the importance of PACS/HIS in construction of the database,as well as of the database in medical imaging teaching.

ObjectiveTo determine whether glutamate induces the alteration of aquaporin 4 (AQP4) expression in cultured rat astrocytes. MethodsThe secondary cultured astrocytes were treated with 1 mmol/L L-glutamate for 1 h, 3 h, 6 h, 12 h, 24 h and 48 h. The morphologic changes of astrocytes were observed through microscope after GFAP immunostaining and AQP4 mRNA expression were detected with real-time PCR. ResultsThe astrocytes swelled when exposed to glutamate for 1 h and remained with prolonged treatment. Meanwhile, the AQP4 mRNA expression were early down-regulated and subsequently up-regulated, featured with the lowest AQP4 mRNA level at 12 h after treatment (P<0.01) and higher at 48 h (P<0.05). ConclusionAquaporin 4 may be involved in the occurrence and development of astrocyte swelling induced by glutamate.

ObjectiveTo evaluate the diagnostic performance of CTCA in predicting myocardial perfusion defects through comparative analysis between MPI defects and severity of coronary stenosis on CTCA.MethodsFour hundred and seventy-eight patients who underwent CTCA and 99Tcm-MIBI MPI in the same period were analyzed retrospectively.According to the severity of coronary stenosis judged by visual evaluation of the vessel diameter,the patients were divided into five groups:no stenosis,mild stenosis,moderate stenosis,severe stenosis and total occlusion.MPI results were classified as negative or positive for perfusion defects,and the prevalence of perfusion defects in every group was calculated per-patient and per-vessel basis.The cut-off of stenotic severity for predicting myocardial perfusion defects was designated as 50％ or 75％,with MPI as standard reference.True positive,true negative,false positive and false negative statistics were thus determined separately on patient and vessel basis.The diagnostic performance for CTCA were calculated and compared.Pearson Chi-square and its partition tests or Fisher exact test were used to compare ordinal variables.ResultsFifty-eight patients showed myocardial perfusion defects.Either by patientbased or vessel-based analysis,the prevalence of myocardial perfusion defects showed an increasing trend with greater coronary artery stenosis in each group,and there were statistical differences among them (x2 =116.62 and 483.83,both P ＜ 0.05).On patient-based analysis,sensitivity ( SN),specificity ( SP),positive predictive value( PPV),negative predictive value(NPV) and accuracy (AC) for CTCA predicting myocardial perfusion defects were 62.1 ％ ( 36/58 ) and 34.5％ ( 20/58 ) (x2 =8.84,P ＜ 0.05 ),84.5％(355/420) and 97.1％ (408/420) (x2 =40.16,P ＜0.05),35.6％ (30/101) and 62.5％ (20/32) (x2 =7.19,P＜0.05),94.2％ (355/377) and 91.5％ (408/446) (x2 =2.18,P ＞0.05),81.8％ (391/478)and 89.5 ％ (428/478) (x2 =11.66,P ＜ 0.05 ) when the cutoff was set to 50％ and 75％,respectively.On vessel-based analysis,the SN,SP,PPV,NPV and AC for CTCA predicting myocardial perfusion defects were 58.8％ (40/68) and 30.9％ (21/68) (x2 =10.73,P ＜ 0.05),95.9％ (1768/1844) and 99.0％ (1826/1844) (x2 =36.72,P ＜ 0.05 ),34.5％ (40/116) and 53.8％ (21/39) (x2 =4.59,P ＜0.05 ),98.4％ (1768/1796) and 97.5％ ( 1826/1873 ) (x2 =4.14,P ＜ 0.05 ),94.6％ ( 1808/1912 ) and 96.6％ ( 1847/1912 ) (x2 =10.31,P ＜ 0.05 ),respectively.ConclusionsThe prevalence of myocardial perfusion defects correlates positively with the severity of coronary stenosis seen on CTCA.CTCA may predict perfusion defects with high SP and NPV.However,the PPV of CTCA in predicting myocardial perfusion defects is poor when the stenosis cut-off is set at 50％.It is significantly improved when the cutoff value is set at 75 ％.

Purpose To compare the CT features of hepatic metastases of gastro-entero-pancreatic adenocarcinomas with and without neuroendocrine differentiation [NED(+) and NED(-)] and to explore the value of CT features in differentiation of the two groups.Material and Methods From January 2009 to December 2015,abdominal CT scans of 17 pathologically proved cases of NED(+) gastro-entero-pancreatic adenocarcinomas with hepatic metastases and 34 pathologically proved cases of NED(-) hepatic metastases with sex,age and primary site matched were retrospectively reviewed.CT features including hepatic metastases number,size,distribution,shape and enhancement were assessed,as well as presence of lymphadenopathy or ascites.Differences of CT features between the two groups were analyzed.Results Compared with NED(-) group,hepatic metastases of NED(+) group more frequently demonstrated a peripheral enhancement on artery phase (94.1％ vs.44.1％,P＜0.05),and more washout on portal venous phase (41.2％ vs.5.9％,P＜0.05),while hepatic metastases of NED(--) group showed more plateau type (91.2％ vs.58.8％).There was no significant difference of other findings between the two groups (P＞0.05).Logistic regression revealed that enhancement area in hepatic artery phase and enhancement changes in portal venous phase were independent factors for differential diagnosis (P＜0.05).The area under the ROC curve of combining the two features was 0.811 (P＜0.05).Conclusion There are some different CT enhancement features between NED(+) and NED(-) hepatic metastases of gastro-entero-pancreatic adenocarcinomas,which are helpful in differential diagnosis.

BACKGROUND: von Willebrand factor (vWF) is only released from endothelial cells and platelets and is an in vivo and in vitro marker of endothelial injury in septic patients with acute lung injury (ALI). Interleukin-8 (IL-8), as a proinflammatory mediator causing recruitment of inflammatory cells, induces an increase in oxidant stress mediators and makes it as a key parameter for localized inflammation. However, it has not been well established whether the level of serum IL-8 is associated with the severity of lung injury and whether it is a prognosis marker for severe lung contusion. This study was to investigate the expression of plasma vWF and IL-8 and their association with the severity and outcomes of severe pulmonary contusion. METHODS: A total of 63 patients were divided into a severe pulmonary contusion with acute respiratory distress syndrome (ARDS) group and a non-ARDS group, or a survivor group and a non-survivor group, or an injury severity score (ISS) <20 group and an ISS ≥20 group. Another 20 healthy volunteers served as controls. The levels of plasma vWF and serum IL-8 were measured by enzyme-linked immunosorbent assay (ELISA) at 1, 3, 5 and 7 days after injury. The expression patterns of the plasma vWF and serum IL-8 were compared between different groups. RESULTS: The concentrations of plasma vWF and serum IL-8 were significantly increased in all severe pulmonary contusion patients at all time points in comparison with the control group. The concentrations of plasma vWF in patients with ARDS increased during the whole study period, but vWF in patients with non-ARDS increased gradually until day 5 and then decreased at day 7. The concentration of serum IL-8 showed a similar expression pattern in both groups, but the expression increased more significantly in the ARDS group than in the non-ARDS group. Interestingly, both plasma vWF and serum IL-8 levels steadily increased in the non-survivor group. Furthermore, the level of plasma vWF was higher in the ISS≥20 group than in the ISS<20 group. The level of serum IL-8 in the ISS≥20 group was consistently high, while that in the ISS<20 group peaked at day 3 and decreased at day 5. In addition, the level of plasma vWF was positively correlated with platelet count, but negatively correlated with oxygen index. The level of serum IL-8 was positively correlated with white blood cell count and ISS score, and inversely correlated with oxygen index. CONCLUSION: The elevated levels of plasma vWF and serum IL-8 in severe pulmonary contusion patients reflect the severity of pulmonary injury and patients outcomes, suggesting that the plasma vWF and serum IL-8 are sensitive markers for clinical evaluation of the severity of pulmonary injury and predication of patient prognosis.

Objective To investigate the clinical features and microsurgical resection techniques of cerebellopontine angle cholesteatoma. Methods Clinical features, surgical approach and techniques, results and complications were analyzed in 30 cases of cerebellopontine angle cholesteatoma. Results Total resection in 26 cases, subtotal resection in 4 cases ,no operative mortality. Post-operative complications was aseptic encephalitis which was most common after treatment, and all recovered. Conclusion Cerebellopontine angle cholesteatoma was a third category of common tumors, CT, MRI examination can provide diagnosis. According to cholesteatoma involving the site ,selecting a good surgical approach and making good use of microsurgical technique could improve surgical total removal rate and reduce postoperative complications.

OBJECTIVE: To discuss whether a reduced dose of CsA was allowed yet without increase risk of rejection, and whether the incidence of CsA-related side effects be reduced while the curative effects be enhanced by combined use of Cyclosporine (CsA), prednisone and Mycophenolate Mofetil (MMF) in patients after renal transplantation. METHODS: In this comparative study, 213 renal allograft recipients receiving routine dose of CsA were compared with 176 cases receiving low dose CsA. RESULTS: The two groups showed no significant differences in renal function, incidence of rejection and human/kidney survival rate. However, the low dose CsA group showed a better total curative efficacy and significantly fewer incidences of ADRs. CONCLUSION: CsA, MMF and Pred used concomitantly in patients after renal transplantation allows for a reduced dose of CsA yet without increase the risk of acute rejection if with enough dose of MMF.

Objective The aim of this study was to evaluate whether PRDM16 gene polymorphisms were associated with dyslipidemia. Methods The polymorphisms of rs2651899, rs2236518, rs870171, and rs2282198 in PRDM16 gene in 528 participants were genotyped by the method of snapshot or ligase detection reaction. The genotype differences and the allele differences between the case group and the control group were analyzed. Linkage disequilibrium analysis was performed with SHE-sis online software. The interaction between rs2651899, rs2236518, rs870171, rs2282198 and gender, age, BMI were analyzed by MDR software. Results The frequency of allele A in rs2651899 locus was significantly higher in low HDL-C group compared with that in control group[OR(95%CI)=1.32(1.02-1.71), P=0.033]. The frequency of A/C genotype in rs870171 was significantly different between LDL-C abnormal group and control group[OR(95% CI)=1.97(1.01-3.86), P=0.037]. There may be interaction between rs2236518 and sex, which is a risk factor for low HDL-C[Model Ⅱ: OR(95% CI)=1.958(1.366-2.809), P<0.01]. There may be interactions among rs2651899, rs2236518, rs870171, and rs2282198, which seemed to be risk factors for lower HDL-C[Model Ⅳ: OR(95% CI)=3.991(2.707-5.884), P<0.01]. rs870171, rs2282198 may have interaction with age, which is a risk factor for high LDL-C [Model Ⅶ: OR(95%CI)=3.991(2.707-5.884), P<0.01]. Conclusion Allele A of rs2651899 may be a risk factor to low HDL-C. Under the codominant inheritance patterns, genotype A/C of rs870171 may be a risk factor to high LDL-C. In addition, there may be interaction between SNPs with gender and age.

OBJECTIVETo investigate the mechanism of epididymal hypofunction of rats with varicocele (VC) by observing the changes in the epididymal index, motility of epididymal sperm, expressions of hypoxia-inducible factor 1 alpha (HIF-1 alpha) and the tumor suppressor protein p53, and epididymal epithelial cells.

METHODSNinety SD rats were equally randomized to a VC model (A), a sham operation (B), and a normal control group (C). At 49 days after surgery, all the rats were executed after weighing. Then the volume of the left epididymis was obtained, the epididymal sperm motility was detected by computer-assisted sperm analysis (CASA), the expressions of HIF-1 alpha and p53 in the epididymal tissue were determined by Western-blot, and the epididymal epithelial cells were observed by HE staining.

RESULTSVC models were successfully established in 27 of the rats. One-way ANOVA test showed no statistically significant differences in the epididymis index among groups A ([40.53 +/- 1.76] x 10 (-5)) , B ([43.31 1.58] x 10( -5)) , and C ( [44. 10 +/- 2.62] x 10 -5) (P > 0.05). Sperm motility and the percentage of progressively motile sperm were significantly lower in group A ([71.86 +/- 5.07]% and [42. 26 +/-4.45]%) than in B ([78.51 4.50]% and [49.08 +/-4. 19]% ) and C ( [79.24 +/- 2.70] % and [52. 23+/- 2. 23] % ) (both P <0.05) , while the expressions of HTF-1 a and p53 were remarkably higher in A (1.74 +/- 0. 16 and 1.71 +/- 0. 11) than in B (0.32 +/- 0. 08 and 0.56 +/- 0.13) and C (0.12 +/- 0. 03 and 0.25 +/-0.06) (both P < 0.05). The epididymal epithelial cells in group A were obviously decreased in number and arranged in loose and disorderly patterns as compared with those in B and C.

CONCLUSIONVaricocele can cause hypoxia in the epididymal tissue, which in turn may lead to epididymal hypofunction.

Animals ; Disease Models, Animal ; Epididymis ; metabolism ; Hypoxia-Inducible Factor 1, alpha Subunit ; metabolism ; Male ; Rats ; Rats, Sprague-Dawley ; Sperm Motility ; Tumor Suppressor Protein p53 ; metabolism ; Varicocele ; metabolism