Objective To study the value and clinical significance of diffusion tensor imaging(DTI)in differentiating high-grade astrocytomas and solitary metastatic tumors of brain.Methods 16 patients with intracranial solitary metastasis and 25 patients with high-grade astrocytoma confirmed pathologically were examined with MR DTI.Mean diffusivity(MD)and fractional anisotropy(FA)were measured in the regions of interest(ROI)of peritumor and cerebral parenchyma of the normal side on DTL Fiber tractography was reconstructed and the encountered patterns of tumor-related alteration to cerebral white matter were observed.Results The peritumor were all depicted as hyperintense or isointense signals on DTI.The FA values were 0.227±0.05 and 0.169±0.07 in the peritumor of high-grade astrocytoma and metastasis respectively,which was of significant difference(P＜0.05).Furthermore,fiber tractography could display the course of white matter tracts in three-dimensional space.Conclusion DTI may be help to differential diagnosis of solitary metastasis and high-grade astrocytoma in clinical practice.

AIM: To study the effect of three kinds of drying methods on quality of Radix Angelicae Sinensis. METHODS: TLC, HPLC determination of volatile Oil and ethanol-extra ctives were used. RESULTS: The constitutents in three kinds of dried samples are the same, the contents of vo latile oil and ferulic acid have evident difference in three kinds of aried samp les. The content of fumed sample is the highest. CONCLUSION: The fuming method is the best drying one.

Objective To investigate the clinical efficiency of kid foot soft tissue defect with reverse flap with cutaneous branch of fibular artery combine with sural nerve nutritional vessel axial. Methods From Feb. 2006 to Feb. 2009, according to the position and size of the soft tissue defects, the sural nerve nutritional vessel flap combine with the cutaneous branch of the peroneal artery were desingned and obtained to repair the 5 cases soft tissue defects of the foot. The flap size ranged from 8 cm × 7 cm to 18 cm × 10 cm. The vessel pedicle of cutaneous branches ranged from 1.7 cm to 3.0 cm. The distribution of the vessel pedicle of cutaneous branches ranged from 4.5 cm to 8.0 cm on the lateral malleolus. Results All flaps survived completely in 6 cases. The outline and function were satisfactory during 6-18 months follow-up. Among of 6 cases, the sural nerve were anastomosed with the acceptor sensory nerve in all cases. The skin sense were sat-isfactory after 1 year of operation and 2-point discrimination was 10-13 mm. Conclusion The blood supply of this flap is reliable without sacrifice of major arteries. Flap elevation is easy. It can reverse to a long dis-tance and can repair large skin defects. Especially this flap could have some sensory nerve. It is very useful in repairing kid foot large soft tissue defect.

Objective:To investigate the predictive value of 18F-fluorodeoxyglucose (FDG) PET/CT metabolic parameters for occult lymph node metastasis (OLM) in non-small cell lung cancer (NSCLC). Methods:A total of 183 patients (72 males, 111 females; age (61.5±8.4) years) who underwent 18F-FDG PET/CT and preoperatively diagnosed with clinical N0 stage (cN0) in Third Affiliated Hospital of Soochow University from January 2013 to December 2018 were retrospectively enrolled. All patients underwent anatomical pulmonary resection with systematic lymph node dissections within 3 weeks after 18F-FDG PET/CT examinations. According to the presence or absence of lymph node metastasis, patients were divided into OLM positive (OLM+ ) group and OLM negative (OLM-) group. Parameters of primary lesions, such as the maximum diameter (D max), tumor sites, morphological features, maximum standardized uptake value (SUV max), mean standardized uptake value (SUV mean), metabolic total volume (MTV), total lesion glycolysis (TLG), tumor SUV max to liver SUV mean (TLR max), tumor TLG to liver SUV mean (TLR TLG) were analyzed. Mann-Whitney U test and χ2 test were used to compare the parameters between groups. Multivariable logistic regression was used to analyze the independent risk factors for OLM. Receiver operating characteristic (ROC) curve analysis was used to evaluate the diagnostic value of different parameters. Results:Among 183 patients, 25 (13.7%, 25/183) of them were diagnosed as OLM. In OLM+ group, 46 lymph nodes were pathologically positive for metastasis, including 15 N1 disease and 31 N2 disease. D max (2.9(2.3, 3.7) vs 2.3(1.7, 2.8) cm), lobulation ((76.0%(19/25) vs 37.3%(59/158)), SUV max (11.1(7.9, 17.7) vs 4.7(2.3, 9.2)), TLG (41.5(10.2, 91.1) vs 15.6(6.5, 23.8) ml), TLR max (4.7(3.5, 7.6) vs 2.1(0.9, 4.0)) and TLR TLG (18.1(5.0, 44.3) vs 6.1(3.0, 11.4) ml) of the primary lesions in OLM+ group were significantly higher than those in OLM-group ( z values: from -4.709 to -3.247, χ2=13.190, all P<0.05). Multivariable logistic regression analysis showed that TLR max (odds ratio ( OR)=15.145, 95% CI: 3.381-67.830, P<0.001) and D max ( OR=3.220, 95% CI: 1.192-8.701, P=0.021) were independent risk factors for OLM. TLR max yielded the highest area under curve (AUC; AUC=0.794) with the threshold of 3.12, and the sensitivity, specificity, accuracy, positive predictive value and negative predictive value for predicting OLM were 92.0%(23/25), 63.3%(100/158), 67.2%(123/183), 28.4%(23/81) and 98.0%(100/102), respectively. Conclusions:TLR max of tumor is the independent risk factor for OLM in NSCLC patients. TLR max can sensitively predict OLM preoperatively in patients with NSCLC.

ObjectiveTo investigate the relationship between ceruloplasmin expression and Down syndrome (DS). MethodsDifferential protein expression in serum of six mothers with DS fetuses and six mothers with healthy fetuses was detected by two-dimensional electrophoresis and matrix assisted laser desorption ionization-mass spectrum,the results were confirmed by Western blot.The levels of serum ceruloplasmin in 11 mothers with DS fetuses,10 mothers with healthy fetuses,11 DS newborns and 10 healthy babies were detected by enzyme-linked immunosorbent assay.The difference between the two groups was compared by two-independent samples t test. ResultsTwenty-nine differential proteins were found in the serum of the mothers with DS fetuses; among which ceruloplasmin increased significantly compared with that in mothers with healthy fetuese with density ratio of 5.43 (t=2.7102,P＜0.05).Western blot results showed that the expression of ceruloplasmin in maternal serum with DS fetuses (0.95 ± 0.24) was higher than that of normal mothers (0.37±0.14) (t=2.9521,P＜0.05) ; while the expression of ceruloplasmin in DS babies' serum (0.74±0.03) was lower than that of normal newborns (0.89±0.06)(t=-2.9515,P＜0.05).The expression of ceruloplasmin in serum of mothers with DS fetuses [(346.5± 111.8) ng/ml] was higher than that of normal mothers [(248.6478.3) ng/ml] (t=2.301,P＜0.05) ; while the expression of ceruloplasmin in DS babies' serum [(166.1 ±55.0) ng/ml] was lower than that of normal newborns [(244.0±36.0) ng/ml] (t=-3.873,P＜0.01). ConclusionsAbnormal maternal and neonatal serum ceruloplasmin level might relate to DS.

To evaluate the efficacy of HbA1C in diagnosing diabetes in subjects with primary hypertension.The results demonstrated that the area under the reciever operating characteristic ( ROC ) curve was 0.895,with corresponding sensitivity of 85.4％,and specificity of 82.2％,when the optimal cutpoint of HbA1C in diagnosing diabetes was 6.0％.Our study suggested that HbA1C ≥6.0％ can be used efficiently in diagnosing diabetes in patients with primary hypertension.

Background To optimize the culture method of human retinal microvascular endothelial cells is very important for the study of retinal angiogenesis disease.Human retinal microvascular endothelial cells have been successfully cultured in previous studies,but further improvement of the culture method to harvest higher yields and purity cells is still needed.Objective This study was to design a modified method to isolate and purify human retinal microvascular endothelial cells much easily and quickly,and to compare the expression of specific markers of vascular endothelial cells,factor Ⅷ and CD31/CD34 in the cells.Methods The use of human donor eyeballs was approved by the Ethic Commission of Zhongshan Ophthalmic Center of Sun Yat-sen University.The retina tissue from healthy donor was isolated and digested by the two-step digestion method with 2％ trypsin and 0.133％ collagenase Ⅳ.Human retinal microvascular endothelial cells were collected and plated in 60 mm dishes coated by 0.1％ fibronectin and cultured in endothelial cell-specialized medium supplemented with 10％ fetal bovine serum,0.3 mg/L β-endothelial cell growth factor (ECGF) and 100 ng/L sodium heparin.During the culturing,the growth situation of the cells was monitored by morphological observation,and immunohistochemical staining was performed to probe vascular endothelial cell-specific membrane protein CD31,CD34 and factor Ⅷ for identification of the cell purity.Results Human retinal microvascular endothelial cells were isolated successfully from the retina by the twostep digestion method.The primary cultured cells adhered to well 72 hours later and achieved confluence with the typical cobblestone appearance 9 to 10 days after cultured.The cells exhibited the blue nuclei and reddish cytoplasm by regular haematoxylin and eosin stain and showed a strong positive response for CD31,CD34 and factor Ⅷ by immunohistochemistry.The positive dye of CD31 and CD34 was lower than Ⅷ factor in both endothelial cells.Conclusions Modified culture method of human retinal microvascular endothelial cells can improve cell culture result and purify target cells.

Objective To improve the awareness of the CT and/or MRI appearances and clinical presentations of Kasabach-Merritt syndrome(KMS),6 cases were reported.Methods The CT and/or MRI and clinical characters of 6 cases of KMS were reviewed and analyzed.Results Thrombocytopenia,and consumption coagulopathy were presented in all 6 cases.The paravertebral mass of posterior mediastinum, right pericardial lesion,skin and soft tissue of left arm were shown as iso-,hypointensity on T1-weighted image,iso-,hyper-intensity on T_2-weighted image,and with heterogeneous enhancement after contrast administration in three cases.Splenomegaly was presented in one case,it showed homogenous hypoattenuation on unenhanced CT,and diffused heterogeneous enhancement after contrast administration. On MRI,spleen was shown as hypointensity on T_1-weighted image,hyperintensity on T_2-weighted image, and with heterogeneous enhancement after contrast administration.There were lesions in both bones and spleen in one case.Osteopenia and thinned cortex were shown on the metaphyses of upper and lower extremities.Spleen enlarged and showed multifocal hypoattenuation lesions,the peripheral region enhanced on the early phase,and some of the lesions filled on the delayed phase after the contrast administration.One case showed huge hypoattenuation lesion in the left lobe of liver with gradually filling of the mass after peripheral enhancement.Conclusion Thrombocytopenia and consumption coagulopathy suggest the entity of extensive hemangioma.Splenomegaly with diffuse or focal hypoattenation or hypointensity in MRI infers the diagnosis of hemangioma.

Objective To clarify the relationship between CT120,a novel human plasma membrane-associated gene,and the proliferation of lung adenocarcinoma cell line A549.Methods Expression vector(pcDNA3.1)containing antisense oligonucleotides of CT120 was constructed and transfected into the adenocarcinoma cell line A549.RT-PCR and Western blot detected the expression of CT120.Meantime,flow cytometry and soft agarose colony formation were applied for cell proliferation,and P53,CyclinD1 and CDK4 were detected by RT-PCR.ResultspcDNA3.1 containing antisense oligonucleotides of CT120 was successfully constructed and inhibited the expression of CT120 effectively by RT-PCR and Western blot.The expression of P53 was up-regulated and the expression of CyclinD1 and CDK4 were down-regulated.Conclusion The down-regulation of CT120 expression by antisense oligonucleotides technique may be a potential drug target for treatment of lung cancer.

Actins ; analysis ; Animals ; Dimethylnitrosamine ; Immunohistochemistry ; Liver ; metabolism ; pathology ; Male ; Necrosis ; chemically induced ; pathology ; Rats ; Rats, Wistar ; Reticulin ; analysis ; Silver Staining