Objective To study the MRI features of sporadic Creutzfeldt-Jakob disease(sCJD). Methods Three patients with clinically diagnosed sCJD underwent MR study,including SE T_1WI,FSE T_2 WI,and DWI sequences.The MR imaging features were analyzed.Results The lesions were not definite either in SE T_1 WI or in FSE T_2 WI,but were prominent in DWI.Abnormal hyperintensive signal appeared in the cerebral cortex,with the frontal,parietal,and occipital lobes being the mostly involved region.The subcortical white matter was normal.The bilateral caudate nuclei and thalami could also be involved.The abnormal signal could be either symmetrical or asymmetrical.There was diffuse atrophy of the brain parenchyma in the late phase of disease,especially in the cortex.Conclusion With the application of MR study,especially the DWI,combined with its characteristic clinical manifestation,the diagnosis of sCJD can be made definitely.

There are many factors which may interfere with HbA1c measurement.Hemoglobin variant is one of the most important factors.Different hemoglobin variants may interference with different HbA1c measuring systems,resulting in HbA1c analytic interference or clinically misleading because of the values do not reflect the true glucose levels.This may affect clinical dignosis and disease monitoring.

Pure culture of Phlebopus portentosus was inoculated in the roots of coffee tree. The results indi-cated that the young fruit bodies would come out around the rhizomes of host tree after inoculation in 30 to 90 days, single or cluster, 3 to 4 days for mature, weight 20.0 g to 62.0 g. Brown rhizomorph and hyphae can be seen on the seedlings`rhizome, main root and side root while nothing is on the tip of the root.It was found that rhizomorph on the surface of roots would die after inoculation in 90 days in pot.

OBJECTIVETo investigate the levels of secretions from the prostate and seminal vesicles and their association with the expressions of aquaporins (AQP) in the prostatic tissue and seminal vesicles of castrated rats.

METHODSWe randomly divided 18 eight-week-old male SD rats into a control, a castration, and a testosterone (T) replacement group. Four weeks after surgical castration, we detected the plasma T level and measured the volumes of the secretions and the expressions of AQPs 3, 7, and 10 - 12 in the prostate and seminal vesicles of the rats.

RESULTSThe plasma T level was significantly lower in the castrated models ([30. 98 ± 28. 84] ng/dl) than in the rats of the control ([700.78 ± 123.8] ng/dl) and T replacement groups ([688.08 ± 132. 47] ng/dl) (P <0. 05). The castration group, in comparison with the control and T replacement groups, showed remarkably reduced ratios of prostatic secretion volume / prostate weight ([11.1 ± 0.30] vs [2.32 ± 0.61] and [2.13 ± 0.56] %, P <0. 05) and seminal vesicle secretion volume / seminal vesicle weight ( [4. 78 ± 1. 97 ] vs [57. 36 ± 11. 86] and [55. 74 ± 7. 21] %, P < 0. 05). Immunohistochemistry revealed the expressions of AQPs 3 and 7 in the epithelial envelop and cytoplasm and that of AQP 11 the in endothelial envelop and cytoplasm of the prostate and seminal vesicles. Western blot exhibited significantly lower expressions of AQPs 3, 7, and 10 - 12 in the prostate and seminal vesicles of the castrated rats than in the animals of the control and T replacement groups (P <0. 05).

CONCLUSIONSignificant decreases of the secretions from the prostate and seminal vesicles may be related to the reduced expressions of AQPs 3, 7, and 10 - 12 in the prostatic tissue and seminal vesicles in castrated rats.

Animals ; Aquaporins ; metabolism ; Humans ; Male ; Orchiectomy ; Prostate ; metabolism ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Seminal Vesicles ; metabolism ; Testosterone ; blood

Objective To estimate the difference of PS、CBV/CBF in the evaluation pf angiogenesis and growth behavior of the C6 glioma.Methods Sixty adult Wistar rats were divided into 3 groups randomly.CT perfusion were performed at the time of 5,13,20 d after the rats were inoculated C6 glioma cells.Permeability surface(PS),cerebral blood volume(CBV),cerebral blood flow(CBF)of different part of the tumor(central part,peripheral part,adjacent part and contralateral normal parenchyma)were measured at different time.Results At the central parts of the lesions,there were obvious difference between different time of tumor growth among PS[(3.94?0.15),(8.47?0.34),(5.20?0.65)ml? 100g~(-1)?min~(-1)],CBF[(280.33?8.82),(388.33?14.00),(116.16?11.54)ml? 100g~(-1)?min~(-1)],CBV[(7.75?0.27),(12.73?0.98),(5.14?0.66)ml?100g~(-1)](F=4.421,P= 0.013;F=11.370,P=0.000;F=15.789,P=0.000).There were statistical difference of PS at the different time in both the peripheral and adjacent parts of the glioma.(F=13.567,P=0.000;F=12.470, P=0.000).No difference were detected in CBF or CBV at different time of the peripheral parts of the tumors(F=1.176,P=0.336;F=0.148,P=0.710).there were significant difference between different time of tumor growth among CBF[(175.33?12.95),(275.50?13.76),(246.33?12.81)ml? 100g~(-1)?min~(-1)],CBV[(4.15?0.47),(8.05?0.30),(7.54?0.89)ml?100g~(-1)]at the adjacent parts of the tumors(F=24.176,P=0.000;F=17.148,P=0.000;F=15.791,P=0.000). Coneluslon CBV,CBF can reflect the number and volume of the tumor vessels,while PS can directly reflect the function of the angiogenesis and the behavior of the glioma.

15mm~2)of dural sac cross-sectional area to values smaller than 75 mm~2 was found during examination in axial loading,or if a suspected disc herniation,narrow lateral recess,narrow intervertebral foramen,or intraspinal synovial cyst changed to being obvious at the axial loading examination,they were regarded as additional information.Results After axial loading CT examination,AVI was found in 16 of 40 patients.A significant decrease of dural sac area was found in 13 patients.Intervertebral disc herniation was more severe in 7 patients,lateral recess or interverbral foramen narrowed in 4 patients,no intraspinal synovial cyst was found.After axial loading MRI examination,AVI was found in 19 of 60 patients.A significant decrease of dural sac area was found in 13 patients.Intervertebral disc herniation became severe in 10 patients,lateral recess or interverbral foramen narrowed in 8 patients,no intraspinal synovial cyst was found.AVI was found in 32 of 79(40.5%)patients with sciatica and 2 of 20(10.0%)patients with low back pain(?~2=7.45 P

Objective To compare the accuracy of real-time myocardial contrast echocardiography (RT-MCE) with DISA-SPECT in detecting hibernating myocardium. Methods Fourteen hospitalized patients with regional wall motion abnormalities (RWMA) underwent RT-MCE, DISA-SPECT, coronary angiography and percutaneous coronary intervention(PCI). Every left ventricular myocardial segment image was acquired and evaluated according 16-segment model of American Society of Echocardiography. The Motion of every segment was observed by echocardiography after 1,3,6 months. The gold standard is that the motion of ventricular segment get better after PCI. The images of RT-MCE and DISA-SPECT were analyzed semi-quantitatively. Results The sensitivity,specificity,accuracy of RT-MCE and DISA-SPECT in detecting hibernating myocardium were 74.60%, 91.7%, 81.3% and 93.3%, 75.0%, 86.2%, respectively. RT-MCE had more value in specificity while DISA-SPECT had more value in sensitivity. The correlation between two methods was good in detecting hibernating myocardium. Conclusions RT-MCE and DISA-SPECT can be used as valuable methods to detect hibernating myocardium, the correlation between two methods is good and they have more value in specificity and sensitivity respectively.

Objective To investigate effects of β-thalassemia on 8 HbA1c measurement systems including Capillary electrophoresis and application of HbA2 values of samples with β-thalassemia from Capillary 2 Flex Piercing HbA1c measurement systems.Methods 338 samples without β-thalassemia ( include 80 α-thalassemia with --SEA/ααgenotype) and 225 samples with β-thalassemia were collected in Peking University Shenzhen hospital from January 2014 to August 2014.Samples withβ-thalassemia are all heterozygotes with normal α-globin and abnormal β-globin, and without combining other haemoglobinopathies.76 normal samples and 76 samples with β-thalassemia were selected from above all samples, HbA1c values of which were given by capillary electrophoresis ( Capillary Flex 2 Piercing), enzymatic ( Norudia N HbA1c ), immune transmission turbidity ( oneHbA1c FS ), chemiluminescent immunoassay (ARCHITECT HbA1c Reagent Kit), boronate affinity HPLC (Trinity Ultra2)and ion exchange HPLC (HA8160, VariantⅡTurbo and Variant Ⅱ BioRad 2.0), respectively.HbA1c values given by the eight systems were compared.338 samples without β-thalassemia and 225 samples with β-thalassemia were measured by using Capillarys 2 Flex Piercing HbA1c system and capillary electrophoresis hemoglobin system, the cut-off values of HbA2 from Capillary 2 Flex Piercing HbA1c measurement system for β-thalassemia was
assessed by using ROC curve.Data statistics were done by using SPSS 19.0.Results The HbA1c values of normal samples were well correlated with the comparative system.The correlation coefficients for the 7 systems are all greater than 0.98.For samples withβ-thalassemia, the correlation coefficients are all greater than 0.98 except for Variant Ⅱ Turbo.The bias between normal samples and samples with β-thalassemia have no significant difference except for VariantⅡTurbo.HbA2 values from Capillary 2 Flex Piercing HbA1c measurement and capillary electrophoresis hemoglobin system were well correlated. The correlation coefficient is 0.993.When cut-off value of HbA2 from Capillary 2 Flex Piercing HbA1c measurement system for β-thalassemia is 3.38, sensitivity is 98.3%, specificity is 100% .Conclusions Samples withβ-thalassemia have no significant effects on HbA1c measurement syetems except for Variant Ⅱ Turbo.The Capillary 2 Flex Piercing HbA1c measurement syetem has the advantage of screeningβthalassemia by HbA2 while measuring HbA1c.

Objective To evaluate the Carryover between the chemistry and immunoassay in Beckman Coulter Laboratory Au-tomation System and decide to whether sharing samples for testing between chemistry and immunoassay systems or not. Methods According to a certain order,high concentration samples and low concentration samples of HCG with different sample volume (500 μl,2 000 μl)were tested on Beckman AU5421 automatic biochemical analyzer.The HCG of low concen-tration samples were then tested to evaluate the carryover between the chemistry and immunoassay and explored the correc-tive procedure to deal with the carryover by increasing special cleaning process of beckman AU5421 automatic biochemistry analyzer.Results Under different sample volume,the carryover in a single module and as a whole of the beckman AU5421 automatic biochemistry analyzer were 5.44,15.47,23.51 and 45.96 ppm respectively (t=14.553,P <0.001;t=5.527,P =0.005;t=3.985,P =0.016;t=20.457,P <0.001).By increasing special cleaning process the carryover of 0.22 ppm was detected in 500 μl sample volume of the beckman AU5421 automatic biochemistry analyzer as a whole.Conclusion The car-ryover between the chemistry and immunoassay in Beckman Coulter Laboratory Automation System could been sovled by in-creasing special cleaning process of beckman AU5421 automatic biochemistry analyzer.

Objective To assess influences of hemoglobin variants on different HbA 1c measurement systems.Methods HbA1c values of normal samples and samples with hemoglobin variants were measured respectively byenzymatic assay (Norudia N HbA1c,SEKISUI), immunity transmission turbidity (oneHbA1c FS,DiaSys), boronate affinity HPLC(Ultra2,Trinity Biotech), capillary electrophoresis(Capillary 2 Flex Piercing,Sebia)and ion exchange HPLC(HA8160,Arkary;Variant Ⅱ Turbo(VⅡ-T),Bio-Rad;Variant ⅡTurbo 2.0 (VⅡ-T 2.0), Bio-Rad).HbA1c values from different hemoglobin variants and HbA1c measurement systems were analyzed .Results The HbA1c values from the 7 HbA1c measurement systems were well correlatedin normal samples .For HbE heterozygote , the HbA1c values from VⅡ-T were divided into 2 groups comparing with CFP , and HbA1c differences between CFP and other measurement systems are minor except for HA8160 and VⅡ-T.The HbA1c values of homozygous HbE were given by Ultra 2 but CFP and VⅡ-T 2.0.The differences of HbA1c values from samples with J-Bangkok are much higher than those from the samples with other hemoglobin variants .The differences of HbA1c values from samples with all kinds of hemoglobin variants(Hb J-Bangkok, Hb J-Newyork, Hb G-Taipei and Hb G-Coushatta)are dramatic for VⅡ-T.For rare Kurosaki, CFP can give a hint that there existshemoglobin variant while measuring HbA 1c. Conclusions Capillary Flex 2 Piercingcan well recognize common hemoglobin variants . Different hemoglobin variants have different influences on different HbA 1c measurement systems.The influences of J-Bangkok among HbA1c measurement systems are more evident than the other common hemoglobin variants .