Objective To investigate the diffusion-weighted imaging (DWI)characteristics and the correlation of diffusion coeffi-cient (ADC)and differentiation grade of rectal tubular adenocarcinoma.Methods The DWI characteristics of thirty-eight patients pathologically comfirmed rectal tubular adenocarcinomas were evaluated respectively.There were 9 highly differentiated tubular ade-nocarcinomas,1 5 moderately differentiated tubular adenocarcinomas and 14 poorly differentiated tubular adenocarcinomas.The ADC value was calculated from two different factors (0 and 1 000 s/mm2 ).The correlation between ADC value and the differentiated de-gree of tumour was statistically analysed.Results The mean ADC for highly differentiated group was (0.92±0.05)×10 -3 mm2/s, and the mean ADC for moderately differentiated group was (0.79 ± 0.10)× 10 -3 mm2/s whereas that for poorly differentiated group was (0.71±0.06)×10 -3 mm2/s.The difference among three groups was statistically significant(P <0.05).The ADC value and the differentiated degree of tumour were negatively correlated(Spearman r =-0.704)P<0.01.Conclusion DWI and ADC value can be a useful estimating for the differentiation of rectal tubular adenocarcinoma.

OBJECTIVETo investigate the differences in the expressions of E-cadherin and N-cadherin between high-risk prostate cancer and low- and medium-risk prostate cancer, and analyze their correlation with the age, serum PSA level, and Gleason score of the patients.

METHODSWe retrospectively analyzed the clinical data of 42 cases of prostate cancer, which were divided into a low- and medium-risk group (group A, n = 15) and a high-risk group (group B, n = 27). We measured the expressions of E-cadherin and N-cadherin by immunohistochemical staining, compared their differences between the two groups, and analyzed their correlation with the age, serum PSA level, and Gleason score of the patients.

RESULTSImmunohistochemical staining showed that the expression of E-cadherin was significantly higher in group A than in B (6.1 +/- 0.51 vs 4.2 +/- 0.37, P < 0.01), and so was its positive rate (73.3% vs 25.9%, P < 0.05). The positive rate of E-cadherin was also markedly higher in the patients with serum PSA < 20 microg/L than in those with serum PSA > or = 20 microg/L (66.7% vs 29.6%, P < 0.05), and so was it in the patients with the Gleason score 5-7 than in those with 8-10 (60.9% vs 21.1%, P < 0.05). On the contrary, the N-cadherin expression was significantly lower in group A than in B (3.7 +/- 0.32 vs 7.5 +/- 0.58, P < 0.01), and so was its positive rate (13.3% vs 59.3%, P < 0.01). The positive rate of N-cadherin was also remarkably lower in the patients with the Gleason score 5-7 than in those with 8-10 (26.1% vs 63.2%, P < 0.05). However, there were no statistically significant differences in the N-cadherin expression between the patients with serum PSA < 20 microg/L and those with serum PSA > or = 20 microg/L (P > 0.05), nor in the expressions of E-cadherin and N-cadherin between the patients aged > or = 70 years and those aged < 70 years (P > 0.05).

CONCLUSIONThe expressions of E-cadherin and N-cadherin are significantly different between high-risk prostate cancer and low- and medium-risk prostate cancer, which suggests that both may correlate with the invasion and metastasis of prostate cancer as well as with the serum PSA level and Gleason score of the patients.

Age Factors ; Aged ; Aged, 80 and over ; Antigens, CD ; metabolism ; Cadherins ; metabolism ; Epithelial-Mesenchymal Transition ; Humans ; Male ; Middle Aged ; Prostate-Specific Antigen ; blood ; Prostatic Neoplasms ; metabolism ; pathology ; Retrospective Studies

The free radical scavenging effect of flaxseed was screened by HPLC-DPPH ( 2 , 2-diphenyl-1-picrylhydrazyl-high performance liquid chromatography assay ) and colorimetric DPPH methods. To test the effectiveness of the approach, three Lignans ( secoisolariciresinol diglucoside ( SDG ) , secoisolariciresinol ( SECO) and enterodiol( ED) ) with antioxidative properties were investigated both in monomer and mixture. HPLC conditions were optimized using following methods: Waters XBridge C18 was used as stationary phase, acetonil/H2 O was used as mobile phase and detective wavelength was set at 280 nm. Antioxidant activity of standards was investigated by reaction with or without DPPH radical for 20 min as sample and control, respectively. Both of them were analyzed by high performance liquid chromatography. According to the changes of amount of sample and control, the antioxidant activities of standards were calculated as following order:SDG>SECO>ED. Based on above DPPH-HPLC assay and UPLC-Q-TOF-MS, antioxidants extracted from flaxseed were separated, identified and screened. The radical scavenging activities were in the following order:SDG isomer (5)>SDG (4)>7α-[(β-D-glupyranosyl) oxy]-1-methoxyisolariciresinol (1)>(6R,7R, 8S)-1-methoxyisolariciresinol (2)>herbacetindiglucoside (3). It indicated that the HPLC-DPPH assay could be successfully used for the antioxidant activity screening of complex flaxseed extract.

Objective To forward the concept of solution space of pharmacokinetics for studying radiophannaceutical distributions in animal models. Methods On the basis of special solutions of differential equations of pharmacokinetics, the solution space was established using the characteristics of linearly independent particular solutions and used to express the pharmacokinetics of pharmaceuticals in vivo. 0. 2 ml (7.4 MBq) 2β-carbomethoxy-3β- (4-corophenyl)-8-(2-18F-fluoroethyl) nortropane (18F-FECNT) was injected through tail vein into normal mice. The mice were sacrificed by decapitation at 5, 15, 30, 60, 120 and 180 min post-injection. Brain tissues were removed and weighed, and radioactivity was counted with the γ-counter. The solution space theory was used to study pharmacokinetics of 18F-FECNT in brain tissues of mice. Results The result showed that all solutions of pharmacokinetics models, based on differential equations, were included in the solution space. The solution of any organ or tissue could be linearly expressed by bases of the solution space. When the dimension number of the solution space was no more than 3, the solution could be directly expressed with coordinate picture. By this rule in our theory, the quantity of 18F-FECNT in brain tissues of mice changed with time, which was accorded with the experiment. The coordinates of striatum, frontal cortex, temporal cortex, occipital cortex, parietal cortex, hippocampus and cerebellum in the solution space were ( 10.13, 1.49), (4.27, 0. 84), (4.48, 0.81 ), (2.89, 0.98), (3.65, 0. 83),(3.55, 0. 98) and (2.03, 1.25 ), respectively. Conclusion The theory of solution space could be used to study pharmacokinetics of 18 F-FECNT in mice brain.

0.05).Conclusion The segmental bronchus were visualized reliably by low-dose multi- detector-row CT with 17 mAs. Low-dose CT can be adapted to CT screening for early lung cancer.

Adult ; Air Pollutants, Occupational ; poisoning ; Humans ; Male ; Middle Aged ; Occupational Diseases ; etiology ; Occupational Exposure ; adverse effects ; Pneumoconiosis ; etiology ; Silicon Dioxide ; poisoning

Objective To study the relation between alcohol-induced osteonecrosis of femoral head (AIONFH) related with high morbidity TCM constitution type with CYP2C8 gene polymorphisms.Methods Totally 152 Han nationality NONFH cases from Feburary 2014 to September 2015 from outpatient and the inpatient departments in Gansu Province Hospital of TCM were collected. 50 AIONFH cases were set as medical case group; meanwhile, 45 healthy volunteers were enrolled as control group. Database for medical materials of all patients and volunteers was established. TCM distribution for AIONFH patients was determined. Solution DNA extraction kit was used to extract DNA, and detect the concentration and purity of DNA. The target gene was amplified by PCR and the target gene was amplified by gel electrophoresis. The length of the fragment was confirmed to conduct target gene sequencing. With the results of sequencing and gel electrophoresis, the relation of AIONFH with CYP2C8 gene polymorphism in AIONFH patients with phlegm-dampness syndrome and the control group.ResultsThe CYP2C8 gene loci rs17110453 gene polymorphism was not statistically significant between the two groups (χ2=0.253,P>0.05). There was no significant difference in allele between the two groups (χ2=0.077,P>0.05). The risk of disease in CC genotype was 1.37 times higher than the AA genotype (95%CI: 0.339-5.540), without statistical significance (P>0.05). There was no significant difference in genotype and allele distribution between AIONFH patients with phlegm-dampness and non-phlegm-dampness and the control group (P>0.05).Conclusion CYP2C8 gene loci rs17110453 gene polymorphism A/C mutation has no obvious relation with AIONFH risk. There is no clear relationship between CYP2C8 gene loci rs17110453 gene polymorphism with AIONFH.

Objective To explore the optimal b value in MR DWI for breast.Methods Forty patients with palpable masses of breasts underwent MR and DWI at b = 1000, 800 and 600 s/mm2 before surgery according prospective planning. Visual assessment, signal to noise ratio (SNR) of DWI and the ADC values of benign and malignant lesions were compared among three b values using one-way ANOVA test.The diagnostic value of ADC were analyzed by ROC curves.Results Of the 40 patients, there were 26 patients with malignant lesions and 14 patients with benign lesions verified by histopathology.36 patients with 42 lesions were examined by DWI, and detectabilities at three b values were alike.Most DWI at b = 1000, 800 and 600 s/mm2 were of high quality, and images of grade A were 75.0% (30/40), 77.5% (31/40) and 77.5% (31/40), respectively.Mean SNR at b = 1000, 800 and 600 s/mm2 were 63 ± 22,82 ± 27 and 96 ± 29 respectively.Compared with one another, there was statistically significant difference (P <0.01).Mean ADC of benign lesions at different b values were (1.44 ± 0.28) × 10-3, (1.50 ± 0.32) × 10-3 and (1.52±0.29) × 10-3 mm2/s respectively. Compared with one another, there was no statistically significant difference (P = 0.725).Mean ADC of malignant lesions were (1.00 ± 0.25) × 10-3, (0.98 ± 0.19) × 10-3 and (1.07 ± 0.22) × 10-3 mm2/s respectively.Compared with one another, there was also no statistically significant difference (P = 0.358).The area under the ROC curves at b = 1000,800 and 600 s/mm2 were 0.879,0.885 and 0.865 respectively.Threshold value to distinguish benign and malignant lesions were 1.295 × 10-3,1.435×10-3 and 1.335×10-3 mm2/s respectively.Sensitivity of diagnosing breast cancer were 80.0%, 92.0% and 84.0%, and specificity were all 90.0% . Positive predictive values were 95.2%, 95.8% and 95.5% at b = 1000, 800 and 600 s/mm2.Conclusion Combining SNR and the value of ADC in diagnosing benign and malignant breast lesions, the study indicated that b = 800 s/mm2 was the optimal b value in breast DWI.

Objective To evaluate the value of diffusion.weighted imaging(DWI)in the differential diagnosis of benign and malignant breast lesions with Meta.analysis.Methods English and Chinese articles published from 1997 to 2007 were searched in Cochrane library,Pubmed,Ovid.Elsevier.Springer databases and Chinese National Knowledge Infrastructure(CNKI),and selected according to the criteria for diagnostic research recommended by Cochrane Method Group.The characteristics of selected articles including the study background,design,results and diagnostic indicators were analyzed.Statistical analysis was performed with Meta-test version 0.9.Results Six articles were included with a total of 479 lesions.The sensitivity and specificity of DWI for breast 1esions ranged from 64.0% to 92.8% and from 45.8% to 96.7% respectively. All groups had homogeneity.and a fixation effects regression Was developed.The pooled weighted sensitivity and specificity with 95% CI and Az Was 86%(76%-92%).80%(61%-91%)and 92.19% respectively.Sensitivity analysis demonstrated no remarkable change on heterogeneity.Condnsion The value of ADC in DWI can help to differentiate the benign breast lesions from the malignant with good sensitivity and specificity.The further study is needed to assess the clinical aplication of the b-value and diagnostic threshold.

To develop an ophthalmic preparation of Shedan, an in situ forming gel was prepared with the formulation containing 18% of poloxamer 407 and 5% of poloxamer 188 by response surface designs plus central composite designs. The rheology results showed that LVE range gamma should limited within 0.5%, Shedan high-frequency region, and the thixotropy recovery time is less than 5 seconds. The phase transition temperature was 33.25 °C according to curve of storage modulus and loss modulus determined by temperature scanning. Surface tension and osmometer of it determined by surface tension meter and dew point osmometer were 36.43 mN · m(-1), and 320.6 mOsm · kg(-1), respectively. Fluorescein sodium was selected as the marker to monitor the corneal residence time, and the results showed that Shedan gel could prolong drug residence for 180 min. In line with zero-order kinetics, releases of muscone and salvianolic acid B in vitro depends on gels erosion. The results of rabbit ocular irritation experiments suggested that Shedan in situ forming gel was biocompatible and nonirritant. In conclusion, a novel Shedan in situ forming gel was developed and characterized for potential drug treatment of retinal vein occlusion.
Animals ; Benzofurans ; chemistry ; Cycloparaffins ; chemistry ; Female ; Gels ; chemistry ; Male ; Ophthalmic Solutions ; Poloxamer ; chemistry ; Rabbits ; Retinal Vein Occlusion ; drug therapy ; Viscosity