Objective To evaluate the effect of different tube voltage and noise index (NI)on image quality and radiation dose during peripheral artery CTA with automatic tube current modulation(ATCM)technique.Methods Seventy-two patients were ran-domly divided into three groups with different scanning tube voltage and noise index as follows:group A with 100 kV and NI of 1 5, group B with 80 kV and NI of 1 5,group C with 100 kV and NI of 20.Image quality,segmental vascular enhancement,signal-to-noise ratio (SNR),contrast-to-noise (CNR)and effective dose (ED)were independently evaluated in 3 groups.The methods of sta-tistics analysis were ANOVA,and P <0.05 represented the significant difference.Results There was no significant difference of image quality of the peripheral artery among 3 groups.The CT value,SNR,CNR in group B (80 kV)was the highest,and there were statistical differences between A,B groups and B,C groups of arteries (P <0.05),and there was no satistiacal difference between A group and C group.Compared with group A and group B,the CTDlvol,DLP and ED of group C was reduced 50.45%,51.20%,51.21% and 35.03%,34.91%,34.92%,respectively,and the difference was statistical significance (P < 0.05 ),and there was no significant difference between group A and group B (P >0.05).Conclusion Using ATCM low-kV with high NI scanning can reduce radiation dose without interference on image quality for peripheral artery CTA.

Liver cirrhosis is a common chronic progressive liver disease,and at present the most effective treatment for advanced liver cirrhosis is liver transplantation.However,main reasons of limiting the wide application of liver cirrhosis are liver source deficiency,expensive cost,graft rejection reaction,the complications caused by long-term application of immunosuppressant and so on.Stem cell transplantation has become a new method for the treatment of liver diseases due to its beneficial to the damaged liver tissue repair,and it can compensate part of liver function.The basis and clinical research progress,the existing problems and prospects of the bone mesenchymal stem cell transplantation for the treatment of liver cirrhosis are summarized,aiming to provide theoretical basis for the further research.

Objective To evaluate the techniques and application of 64-slice helical CT colonography in colonic lesions. Methods Thirty-eight patients (including 12 colonic carcinomas,10 polypi, 9 colon multiple scrobiculus, 2 multiple diverticula, 2 negative, 1 congenital bowel malrotaion,1 ulcerative colitis and tunica mucosa glandular organ hyperplasy,1 colocolic anastomosis of terminal ileum and sigmoid colon) underwent volume scanning using 64-slice helical CT after cleaning colon. Six types of reconstruction including CT virtual colonoscopy(CTVC), volume rendering(VR), multiple planar reconstruction(MPR), 360?sectional view, RaySum,and navigation were gained.CTVC appearances were compared with that of conventional colonoscopy(CC).Results In 12 colonic carcinomas and 10 polypi,the lesions’ morphology,number,size, were satisfactorily shown by CTVC. The lesions’ location,range,and 1 intestinal canal obviously stenosis were also exactly shown by RaySum.The relationship between tumor and environment, 3 liver or retroperitoneal lymph node metastasis were satisfactorily shown by MPR and 2D transection image. On 360?sectional view,the distance between tumor and anus was exactly measured and the result was in conformity to that of CC. Of the CTVC appearances,1 sigmoid carcinoma and 1 transverse colon polyp was in unconformity to that of CC;1 ulcerative colitis and descending colon carcinoma was diagnosed as ulcerative colitis and tunica mucosa glandular organ hyperplasy by pathology.Conclusion 64-slice helical CT is a valuable imaging technique for detecting colon diseases. CTVC can obtain more clinical information than CC combining MPR,RaySum and VR.

Objective To study the clinical value of 64-slice spiral computed tomography(64SCT) contrast-enhanced scan and three-dimensional reconstructed techniques in the diagnosis of complex congenital heart disease(CCHD). Methods 39 patients with CCHD underwent CT angiography and transthoracic echocardiograms (TTE). Of them, the electrocardiographic-gating technique was used in 8 cases. The accurate rates in diagnosing CCHD with CT, TTE and CT with or without electrocardiographic-gating were analysed compared with that of operation and χ~2 test using SPSS13.0 tool. Results A total of 102 cardiac deformities con-firmed by operations,those included 47 intracardiac deformities,the diagnostic accuracys with CT and TTE were 85.1% and 95.7%, respectively, and there was no obvious difference among them (χ~2=2.68, P>0.05). 55 extracardiac deformities, the definite diagnos-tic rates with CT and TTE were 98.2% and 78.2%, respectively. CT was superior to TTE in the indentification of extracardiac de-formities(χ~2= 14.64 ,P<0.01). There was no obvious difference between with and without electrocardiographic-gating technique during CT scanning in diagnosis of cardiac deformities(χ~2=1.84, P>0.05). Conclusion 64SCT has significant value in diagnosis of CCHD,and there was no obvious difference in diagnosis of cardiac deformities by 64SCT between with and without electrocardio-graphic-gating technic.

Objective To explore the concentration of mannan-binding lectin(MBL ) of patients with chronic hepatitis B virus (HBV) .Methods Serum MBL concentrations of 250 patients(case group) with HBV and 150 healthy controls(control group) were measured .Results The serum MBL concentration in case group was higher than that in control group(t=7 .097 ,P<0 .01) . The serum MBL concentration in high HBV-DNA loading group was higher than that in control group(t=7 .179 ,P<0 .01) .The serum MBL concentration in low HBV-DNA loading group was higher than that in control group(t=4 .404 ,P<0 .01) .Conclusion Detection of serum MBL in patients with HBV will be clinically useful for understanding state of an illness and observing the cur-ative effect .

Objective To evaluate the value of serum kaliuretic peptide (KP) in predicting atrial fibrillation (AF) and its prognosis,by detecting serum KP levels in patients with severe sepsis.Methods Fifty-six patients with severe sepsis in Integrated Intensive Care Unit of Shajing Hospital of Shenzhen Affiliated to Guangzhou Medical University from January 2014 to August 2015 were collected as the case group.In addition 20 cases health checkup for the same period were collected as the control group.Serum KP were determined in all patients in the case group every day for 1 week after admission,meanwhile the APACHE-Ⅱ score was undertook,then according to heart guardianship and electrocardiogram whether occurrence of AF the case group were divided into AF group and non AF group.According to survival after 28 days again divided into survival group and death group,the relationship of serum KP with AF and the prognosis were analyzed.Serum KP was detected on the day of physical examination in the control group.Results (1) The incidence of AF was 32.1％(18/56) in 56 patients with severe sepsis.(2)Serum KP in admission to hospital in case group was significantly higher than that in the control group((234.2±73.5) pmol/L vs.(169.6±65.4) pmol/L;t =3.47,P =0.001).Serum KP in admission to hospital in AF group was significandy higher than that in the non AF group((306.0±35.6) pmol/L vs.(200.2±61.2) pmol/L;t =6.79,P =0.001).Serum KP in AF group before 1 day of the occurrence AF was significantly higher than of the admission to hospital ((339.2± 30.5) pmol/L vs.(306.0±35.6) pmol/L;P=0.007),serum KP on the day of occurrence AF was significantly higher than before 1 days of the occurrence AF((390.6±47.8) pmol/L vs.(339.2±30.5) pmol/L;P=0.006),there was no difference between the serum KP after 1 days of occurrence AF and on the day of occurrence AF(P=0.246),but began to gradually declining.Serum KP and APACHE-Ⅱ score in death group on admission to hospital were significantly higher than survival group((301.1±42.0) pmol/L vs.(199.8±61.5) pmol/L,(26.1±2.8) points vs.(19.9±4.3) points;t =6.44,5.67;P＜0.001).(3) Linear correlation analysis showed that serum KP on admission to hospital was positively correlated with the occurrence of AF(r=0.679,P=0.010).According to AF grouping,serum levels of KP on admission to hospital draw ROC curve,the serum KP of AUC was 0.908(95％ CI:0.831-0.984),when the KP value was 351.5 pmol/L,the sensitivity of the occurrence AF was 89.9％,specificity of 97.4％.(4)Linear correlation analysis showed that serum KP on admission to hospital was positively correlated with death(r=0.659,P =0.010),according to prognostic grouping,serum KP on admission to hospital and APACHE-Ⅱ score ROC curve was drew,the serum KP of AUC was 0.893 (95％ CI:0.811-0.974),when the KP value was 338.5 pmol/L,the sensitivity of death was 78.9％,specificity of 97.3％.Conclusion Early serum KP level can be used as an indicator to predict AF and prognosis in the patients with severe sepsis.

Objective To evaluate the anti-HBV effect of hypericin from the cellular level and to preliminarily explore its po-tential drug target point.Methods Liver cell line HepG2.2.15 cells secreting HBV particles were selected as the experimental ob-jects.Hypericin served as the HY group,lamivudine was taken as 3TC group and deionized water as the blank control group.The cells were grouped and administrated.The HBV-DNA copy level was measured at72 h after medication by Southern blot and fluo-rescent quantitative PCR;the inhibition rate of HBsAg and HBeAg was detected by using ELISA assay;the pgRNA expression level was tested by using Northern blot and fluorescent quantitative PCR;Western blot and fluorescent quantitative PCR were adopted to detect the expression of regulatory factors including HNF3β,HNF4α,PPARαand RXRα.Results Compared to the blank control group,both hypericin and lamivudine had significant inhibiting effect on HBV DNA and expression level of HBsAg and HBeAg in HepG2.2.15 cells (P <0.05).Hypericin could significantly decrease the pgRNA expression compared with the blank control group (P <0.05),while lamivudine had no obvious change (P <0.05).Moreover,hypericin exhibited significant effects on the expression of HNF3βand regulatory factor HNF4αcompared with the blank control group and 3TC group(P <0.05).Conclusion Hypericin represents a strong anti-HBV effect,moreover could increase the negative regulatory factor HNF3βn expression and decreases the positive factor HNF4αexpression,prompting that its drug target point could be pgRNA.

This study was aimed to establish the method of identifying bupleurum cultivated germplasm using simple sequence repeat (SSR) molecular markers and to initially establish dataset of characteristic SSR bands to the bred cultivars or strains. From the bupleurum SSR primer pairs which were designed in previous work, 50 primer pairs were selected. Two bred strains and 4 other bupleurum cultivated germplasms were used as test materials. Primers pairs were screened with effective PCR amplification and high polymorphism. Meanwhile, conditions for PCR amplification and electrophoresis were optimized. Then, obtained SSR bands were analyzed and a clustering tree on the basis of genetic distance was constructed. The results showed that 9 SSR primer pairs can be used for identification. The suitable assay conditions were established and characteristic SSR bands were obtained for tested materials. The tested samples can be divided into 4 categories in the genetic similarity coefficient of 0.73. TheB. scorzonerifolium cultivated inHeilongjiang andChuanhongchaiNo. 1 strains were clustered as one category. ChuanbeichaiNo. 1 strain andZhongchai No. 1 cultivar clustered as another category. Cultivated germplasms fromSichuan Fengshunand Rongxian clustered as a unique category. It was concluded that the primer pairs and assay method established in the present study can be used as reference in identification of bupleurum cultivars or cultivated germplasms.

Objective To explore the cognitive function of the patients with bipolar depression (BP), unipolar depression (UP) and their first-degree relatives.Methods 52 patients with BP and 49 their first-degree relatives ,67 patients with UP and 59 their fi~t-degree relatives, 97 normal controls were tested by information, arithmetic, digital symbol, digital span test, block design,logical memory (included immediately and delayed) , visual memory(included immediately and delayed), Stroop Test (included Stroop C and Stroop CW), trail making test (included Part A and Part B) ,verbal fluency and modified Wisconsin card sorting test(M-WCST).Results The scores of digital symbol, block design, immediately logical memory, delayed logical memory, immediately visual memory,delayed visual memory,trail making test B and WCST in the patients with BP and UP were worse than those in normal control(P＜0.01).The score of WCST in the patients with BP was lower than that in the patients with UP ((3.02± 1.96), (4.40± 1.13), P＜0.01).The score of WCST in the relatives of the patients with bipolar depression was worse than that in the normal control((4.32±1.66), (5.15±1.27), P＜ 0.05).Conclusion The patterns of impaired cognitive function on sustained attention,concept of visual space,visual memory,verbal memory and executive function are similar in the patients with BP and UP.The executive function of the patients with BP is worse than the patients with UP.