Animals ; Breast Neoplasms ; metabolism ; Humans ; NF-kappa B ; metabolism ; Neoplasms ; metabolism ; Precursor T-Cell Lymphoblastic Leukemia-Lymphoma ; metabolism ; Proto-Oncogene Proteins c-bcl-2 ; metabolism ; Receptors, Notch ; metabolism ; physiology ; Signal Transduction

Objective To investigate hepatitis B virus mutation rate after the universal immunization in China. Methods DNA sequence analysis of the “a” determinant was performed on sera from 72 viral carrier children after immunoprophylaxis selected through a sampling survery. Results Four mutants were detected, the mutation rate was 5.56%. One strain showed Gly-to-Arg mutation at the 145 codon of surface antigen. Animo acid substitutions at the amino acid 126 and 140 were noted in the other three children. The epidemiological HBV serotype shifted from previous adw infection to more recent adr was also observed. Conclusions These observations indicate that vaccination is probably the cause of mutation, whereas the mutation is low and it will certainly not be a reason for doubting that the vaccination is the method of main choice for preventing hepatitis B infection that still devastates the developing countries.

Objective To investigate the diagnostic value of 18F-FDG PET/CT features of spinal tuberculosis.Methods 18 F-FDG PET/CT imaging manifestation of 125 cases (70 males,55 females,average age 44.3 years) with osseous or mixed vertebra bone destruction from January 2006 to June 2014 were analyzed retrospectively.The patients included 32 cases with spinal tuberculosis (50 lesions,study group) and 93 cases with other diseases (150 lesions,control group).The corresponding FDG PET/CT features were analyzed by two classification logistic regression (Forward:LR),then FDG PET/CT features with statistical significance in diagnosis of spinal tuberculosis were obtained.The sensitivity and specificity of those FDG PET/CT features were calculated.Results Odds ratio (OR) of FDG PET/CT features with statistical significance in diagnosis of spinal tuberculosis from high to low were paraspinal cold abscess (20.790),cold zone(10.528),intervertebral disc involvement(5.394),continuous vertebral involvement(3.493).The diagnostic sensitivity and specificity were 22.0％ (11/50),99.3％ (149/150) forcold abscess,70.0％ (35/50),90.0％ (135/150) for cold zone,82.0％ (41/50),83.0％ (125/150) for intervertebral disc involvement,82.0％ (41/50),78.0％ (117/150) for continuous vertebral involvement,respectively.Spinal tuberculosis often had two or more signs.The continuous vertebral involvement + intervertebral disc involvement was most common,with the diagnostic sensitivity and specificity of 78.0％ (39/50) and 88.7％ (133/150).The diagnostic sensitivity and specificity of continuous vertebral involvement+intervertebral disc involvement+cold zone were 58.0％ (29/50),96.0％ (144/150),and those of four features conourrence were 14.0％ (7/50),100％ (150/150),respectively.Conclusion Regression analysis shows that FDG PET/CT features with statistical significance in diagnosis of spinal tuberculosis are paraspinal cold abscess,cold zone,intervertebral disc involvement,continuous vertebral involvement,which have high diagnostic sensitivity and specificity.

AIM: To investigate the role of mild heat stress towards the immunological function of splenic macrophages and significance of BiP protein expression. METHODS: Primary cultured splenic macrophages were prepared and placed in 41 ℃ thermostat for thermal stress and restored to 37 ℃ after an hour. Heat stressed macrophages were separated into groups at time points of 0 min, 30 min, 60 min, 120 min and 180 min, and their BiP mRNA and BiP protein expressions were detected. At the same time, the phagocytic function, cytotoxicity and chemotaxis of the macrophages were detected. RESULTS: After heat stress, the expressions of BiP mRNA and BiP protein in splenic macrophages remarkably increased, and reached to peak after 30-60 min, still remained higher than control group after 120 min and restored to normal level after 180 min. At the same time, mild heat stress enhanced the phagocytotic, cytotoxicity and chemotactic activities of splenic macrophages, and reached to peak after 60 min then gradually decreased. CONCLUSION: The expression of BiP protein is enhanced after mild heat stress, synchronous changes happen both in BiP protein expression and cellular function. There is close relation between BiP protein expression and increased functions of splenic macrophages induced by mild heat stress.

BACKGROUND: FG loop (FGL) is a core active peptide fragment of neural cell adhesion molecule (NCAM), which can directly act on fibroblast growth factor receptor 1 (FGFR1) to activate NCAM signal pathway.OBJECTIVE: To observe the effects of synthetic peptides FGL on PC12 cells proliferation and apoptosis.METHODS: ①PC12 cells proliferation and apoptosis: The cultured PC12 cells were divided into control group and experiment group. The experimental group was added with 1% FGL peptide solution. The control group was pre-coated with poly-lysine plates. The cells were cultured 1, 3, 5, 7, 9 d respectively to detect cell proliferation by using Cell Counting Kit-8. ②PC12 apoptosis and nuclear factor kappa B mRNA detection: The PC12 cells were divided into normal group, experimental group and injury group. H2O2 was added into the injury group for 16 hours stimulation. In the experimental group, H2O2 and FGL were used for 16 hours stimulation. The cell apoptosis were detected by flow cytometry; mRNA expression of nuclear factor kappa B was detected by quantitative fluorescent polymerase chain reaction.RESULTS AND CONCLUSION: PC12 cells cocultured with FGL peptide grow well, which indicates that FGL peptides can promote PC12 cell proliferation and inhibit PC12 cell apoptosis, as well as decrease mRNA expression of nuclear factor kappa B.

Objective To investigate the effects of normobaric hyperoxia intervention on learning and memory abilities of valproic acid(VPA) autism model rats and the morphology of pyramidal cells in hippocampus CA1 area.Methods Animal model groups of autism were obtained in male offspring of the Wistar rats that received intraperitoneal injection of 600 mg/kg VPA at the 12.5 day after pregnancy.According to the eye opening time,behavior,weaning weight and the learning and memory abilities which were evaluated by the Y electricity maze test at the 28th day after birth,40 male VPA autism model rats were randomly selected 20 only and divided into normobaric hyperoxia model group (group A,n =10),atmospheric air model group (group B,n =10).Normal control groups were obtained in male offspring of Wistar rats that received intraperitoneal injection of equivalent physiological saline at the same period pregnancy.(group C,n =10).Rats in group A were treated with oxygen for 1 h per day and lasted 1 week;group B and C were treated with normal air.The learning and memory abilities of three groups were assessed at the 35th day after birth.The immunohistochemistry methods and image analysis were used to observe the pyramidal cells of autism model rats in hippocampal CA1 region.The effect of normobaric hyperoxia therapy on pyramidal cell of autism model rats in hippocampal CA1 region were evaluated by HE staining technique.Results The trying times of group A after treatment were less than those before treatment (31.15 ± 0.99 vs 31.54 ± 0.97,t =2.739,P =0.018).The memory times were more than those before treatment (3.00± 0.58 vs 2.69 ± 0.48,t =-2.309,P =0.040).The trying times of group A after treatment were less than those in group B after treatment (P =0.016).The memory times of group A were not different from that in group B after treatment(P=0.810).The morphology of pyramidal cells in hippocampal CA1 region showed that the pyramidal cells of the autism model rats had apoptosised.The number of apoptotic cells reduced and the number of normal form cells increased after the normobaric hyperoxia intervention compared with the autism model rats.Conclusion Normobaric hyperoxia intervention can improve the learning and memory abilities of the autism model rats.The apoptosis of the pyramidal neurons in hippocampal CA1 might be reduced after the normobaric hyperoxia intervention.

The construction of biosafety laboratory was highly concerned these years because of the spread of high pathogenic diseases including SARS and avian influenza. In the past several years, the construction of many BSL-2/3 laboratories played an important role in preventing the dissemination of pathogens involved in the research. Meanwhile, serious problems were also raised because some project designers or constructors were not clear with the compulsory safety equipments in these laboratories so that the requirement of zero-leakage could not be achieved. The compulsory safety equipments emerging and disposing solid, liquid and gas offal in the biosafety laboratory were reviewed. The R&D of special equipments in biosafety laboratory in China was also introduced.

Objective To compare the results of CT/MRI registration by using two different marker materials. Methods CT and MR transversal images (using electric wire and thin tube filled with lohexol injection as matching points respectively) were obtained from nine cases with brain tumor. Another CT and MR transversal images were also obtained by using the cod-liver oil capsule filled with gadopentetate dimeglumine injection as matching points with the same scanning position. The images were transferred to the TPS for image registration and the effect was evaluated. Results The CT/MRI CRE range for using different kinds of marker material was 0.16-0.28cm,while was 0.06-0.16cm for using the same marker material. Conclusion Comparing with the method using different kinds of material,the method using the same spherical material can get better results in CT/MRI registration.

Objective To monitor the performance constancy of the HS-126E automatic X-ray film processor and to investigate the effects of chemical processing time on the reproducibility of film dosimetry.Methods With films having identical exposure,15 ready-pack Kodak X-omat-V films from the same batch were divided into 5 groups and exposed one by one under the identical conditions.One group of test film was processed per day from Monday to Friday with identical temperature and time.All films were digitized with a Vidar VXR-16 bit film digitizer. The average optical density(A) at irradiation field center was analyzed with RIT113 film dosimetry system software.At the same time,another 10 films in 5 groups from the same batch were exposed with vertical method and processed to get the calibration data and sensitometric curves.The film sensitivities,i.e.,ratio of A to delivered dose,were calculated and compared between groups.Another 15 films in 5 groups were exposed with horizontal method and processed similarly to the test films,the point dose at 1.5?cm depth on the central axis was calculated with sensitometric curve and compared with the value measured by ion chamber.Results Variations of A value in each group was less than 2%.During the processing period,a trend of decrease along with time in mean A value decreased day by day was observed.Both the standard deviations and coefficients of variation in all groups were within 2%.One-way ANOVA showed that there was a significant difference of the mean A value among all films from Monday to Friday(P

Serum IL-1,IL-6 and IL-8 were determined by subjects-using enzyme linked immunosorbent assay (ELISA technique) in 40 children with bronchial asthma consisting of 20 cases in the acute stage and 20 cases in the remission stage,and another 20 health children as normal control,respectively.The results showed that the levels of serum IL-1(11.9pg/ml±2.84pg/ml),IL-6(0.75ng/ml±0.3ng/ml)and IL-8(0.08ng/ml±0.05ng/ml)in the acute stage were significantly higher than those in the remission stage(8.41pg/ml±0.05pg/ml(IL-1),0.49ng/ml±0.08ng/ml(IL-6)and 0.02ng/ml±0.01ng/ml(IL-8)) and in the normal children (8.4pg/ml±0.32pg/ml(IL-1),0.4ng/ml±0.09ng/ml(IL-6)and 0.02ng/ml±0.02ng/ml(IL-8)),respectively.Further more,there were a significant positive correlation between IL-1 and IL-6 or IL-8(P＜0.01).It is concluded that IL-1 may involve in the pathologic process of asthma like IL-6 and IL-8,and an inflammatory reaction may still exist in the airway during the remission stage of asthma. The imbalances of cytokine network may probably be important reason as a molecular basis in the asthma pathogenesis.It is suggested that it can be valuable to predict an acute attack of asthma when the levels of these cytokines increase.