Objective To observe the effect of iodine deficiency and hypothyroidism on the protein expressions of calcineurin in the hip-pocampus of pups. Methods Female Wistar rats (n=28) after pregenancy were randomly divided into control group,hypothyroid group and iodine deficient group. According to the dose of propylthiouracil (PTU) in the fed water, hypothyroid group was divided into 5 ppm group and 15 ppm group (7 rats in each group). Totally 5 pups from each group were sacrificed and perfused intracardially in postnatal day (PN) 7,PN14 and PN21. Brains were removed,fixed and sectioned coronally. All sections were observed and analysed for the protein exression of calcineurin by immunohistochemistry in the hippocampus CA1,CA3 and DG regions. Results In PN14 and PN21,protein levels of cal-cineurin in GA1 and CA3 regions of the hippocampus in iodine-deficient and 15 ppm treatment groups were significantly higher than those of the controls (P< 0.05) and in DG region,the contrary was true. In PN7,the positive products were scarely observated in each region and the protein expression was no significantly different in all four groups. Conclusion Iodine deficiency and hypothyroidism may increase the protein expression of calcineurin.

Objective To investigate the role of inhaled corticosteroids (ICS) on transforming growth factor - ?1 (TGF - ?1 )of asthmatic remodeling model Methods One hundred and eight guinea pigs were divided into 3 groups randomly and equally: asthmatic group( A), therapeutic group(B), control group(C) Three groups were treated by ovalbumin, budesonide, normal saline respectively The lung tissue specimens were collected after the guinea pigs were killed; the expression of TGF- ?1 was determined Results The expressions of TGF-?1 in A, K and C groups were(41 83 ? 10. 45) %, (27. 22 ? 8. 09)% , (15. 36 ? 2. 64)% respectively at 12 weeks. It was statistically significant( P

AIMTo investigate the effects of the recombina nt human endostatin on adjuvant arthritis (AA) in rats and its mechanisms. METHODSThe model of rat AA was induced by injection of intradermal CFA. ConA and LPS induce d splencytes proliferation was examined by MTT asssy and the activities of inter leukin-1 (IL-1) and IL-2 were measured by the method of thymocytes prolifera tion. Synoviocytes were dispersed with incubation of collagenase and trypsin, an d IL-1, TNF production of synoviocytes was estimated with radio-immunity assay . RESULTSThe secondary inflammation of AA rats appeared on the 1 0th day after injection of CFA. The therapeutic administration of endostatin (0 1, 0 5, 2 5 mg?kg -1 ?d -1 , sc, ?7 d) was given at that time(d 10). It was found that endostatin significantly inhibited the secondary paw swel ling. The increased ConA-induced splenic lymphocyte proliferation reaction and the activated IL-1 and IL-2 activity of AA rats was reversed by the treatment with endostatin. Meanwhile,IL-1 produced by PM? was increased. Endostatin inh ibited IL-1 production from PM? and IL-1 and reduced TNF level of Synoviocyte s in AA rats. CONCLUSIONThe recombinant human endostatin has the rapeutical effect on AA rats, its mechanisms is related to its immunoregulative function.

This article analyzed the ethical situation in hospitals. The author pointed out the defect of confidence between doctor and patient is the primary cause that leaded to the deterioration of doctor-patient relation, and the retardation of medical service management is the important factor that affected the confidence construction. According to all this above, the author proposed the suggestion of strengthening the understanding and communication between doctor and patient, transforming the medical service concept, enhancing the medical service quality, completing the supervising system, increasing the hospital ability of realizing medical service defect and improving the five thoughts of follow up confidence system to direct the hospital confidence ethical construction.

OBJECTIVETo investigate the changes in the distribution and chemical states of the hepatic intra- and extra-cellular sodium ion in the rats with severe burns, so as to provide guidance for fluid resuscitation at early postburn stage.

METHODSNineteen adult male Sprague-Dawley (SD) rats were employed in the study and were randomly divided into control (n = 12) and burn (n = 7) groups. The changes in the longitudinal (T1) and transverse (T2) relaxation times of hepatic intra-cellular and extra-cellular sodium in the two groups were studied with 23Na NMR spectroscopy and a shift reagent.

RESULTSAfter infusion of the shift reagent,the extra-cellular sodium content in rat liver decreased by 17%, with obvious increase in fast T2 component (P < 0.01), indicating an increase in the fraction of Na+ binding sites in the extra-cellular space. The characteristics of relaxation of intra-cellular sodium remained unchanged despite a 57% increment in intra-cellular sodium content.

CONCLUSIONThe deficiency of sodium as a permeable molecule might be related to the postburn movement of hypertonic sodium from extra-cellular to intra-cellular space. The results indicated that it is reasonable to administer high concentration of sodium in fluid resuscitation during the first 24 postburn hours.

Animals ; Burns ; metabolism ; physiopathology ; Cations ; metabolism ; Extracellular Space ; metabolism ; Hepatocytes ; metabolism ; Male ; Rats ; Rats, Sprague-Dawley ; Sodium ; metabolism

Objective A strain of replication deficient recombinant adenvirus encoding fusion glycoprotein (F) of subgroup A human respiratory syncytial virus (RSV) was constructed and the expression of F was identified. Methods The F gone was obtained from pGEM3zf-F with Xho Ⅰ and Hind Ⅲ ,cloned into adenovirase shuttle vector pShutth-CMV,and then the resulting pShutth-CMV/F was transformed into E. coli BJS183/p with pAdeasy-1 to produce pre-adenoviral plasmid encoding F by homologous recombination. This resultant plasmid was linearized by digestion with Pac Ⅰ and transfected into 293 packaging cells to generate FGAd-F. Finally,the expression of F protein was identified by Western Blot analysis. Results FGAd/F was successfully constructed,and the expression of RSV F protein was identified by Western Blot. Conclusion We have obtained a strain of rephcation-defective adenovirus FGAd/F encoding RSV F protein,which can be used further to investigate its protective efficacy against RSV infection in vivo.

OBJECTIVEGlycogen storage disease type III (GSD III) is an autosomal recessive disease caused by glycogen debranching enzyme (GDE) gene (AGL gene) mutation resulting in hepatomegaly, hypoglycemia, short stature and hyperlipidemia. GSD IIIA, involves both liver and muscle, and accounts for up to 80% of GSD III. The definitive diagnosis depends on either mutation analysis or liver and muscle glycogen debranching enzyme activity tests. This study aimed to establish enzymologic diagnostic method for GSD IIIA firstly in China by detecting muscular GDE activity, glycogen content and structure and to determine the normal range of muscular GDE activity, glycogen content and structure in Chinese children.

METHODMuscle samples were collected from normal controls (male 15, female 20; 12-78 years old), molecularly confirmed GSD III A patients (male 8, female 4, 2-27 years old) and other myopathy patients (male 9, 2-19 years old). Glycogen in the muscle homogenate was degraded into glucose by amyloglucosidase and phosphorylase respectively. The glycogen content and structure were identified by glucose yield determination. The debranching enzyme activity was determined using limit dextrin as substrate. Independent samples Kruskal-Wallis H test, Nemenyi-Wilcoxson-Wilcox test, and Chi-square test were used for statistical analyses by SPSS 11.5.

RESULT(1) GSD III A patients' glycogen content were higher, but G1P/G ratio and GDE activity were lower than those of the other two groups (P < 0.01). In all of the three parameters, there were no significant difference between normal controls and other myopathy patients. (2) The range of normal values: glycogen content 0.31%-0.43%, G1P/G ratio 22.37%- 26.43%, GDE activity 0.234-0.284 micromol/(g. min). (3) Enzymologic diagnostic method had a power similar to that of gene analysis in diagnosis of GSD-IIIA patients. The sensitivity and specificity of enzymologic diagnostic method and mutation detection were 91.7% and 100% respectively.

CONCLUSIONEnzymologic diagnostic method of GSD IIIA was firstly established in China. The range of normal values was determined. This method could be used in diagnosing suspected GSD IIIA patients in the clinic.

Adolescent ; Adult ; Aged ; Biopsy ; Case-Control Studies ; Child ; Child, Preschool ; China ; Female ; Glycogen ; analysis ; Glycogen Debranching Enzyme System ; analysis ; Glycogen Storage Disease Type III ; diagnosis ; enzymology ; pathology ; Humans ; Male ; Middle Aged ; Muscles ; chemistry ; pathology ; Young Adult

Objective To quantitatively study the pressure of residual lateral displacement in distal radius AO C3.1 fracture after manual reduction corrected by dynamic airbag pad using finite element analysis and to verify its effectiveness for correcting the residual displacement of fractures. Methods Imageware 13.0, Mimics 15.0 and ANSYS Workbench were used to simulate 1 cm residual lateral displacement after manual reduction of distal radius fracture corrected by dynamic airbag pad. Then the correlation between the distance of residual lateral displacement and the adjustment of dynamic airbag pad pressure were quantitatively analyzed. Results In the case of constant load restrained by airbag ribbon, during the process of pressure adjustment by splint pad, the stress was mainly distributed in the fracture end where the airbag pad was located. About 2.4 kPa pressure was needed to correct 1 mm displacement on radial side, while about 1.3 kPa pressure was needed to correct 1 mm displacement on dorsal side. The dynamic airbag pad was depressurized after the restoration of residual shift. At this time, displacement could be effectively prevented due to the constant load of airbag ribbon and the frictional load at the fracture end. Conclusions In the case of constant load constrained by airbag ribbon, intelligent airbag splint can effectively correct the residual lateral displacement after the manual reduction of the distal radius AO C3.1 fracture and prevent it from being displaced by adjusting pressure of the dynamic airbag pad.

The donkey leukocyte-attenuated vaccine of equine infectious anemia virus (EIAV) was the first lentiviral vaccine that induced solid protection from the infection of virulent strains. To elucidate the mechanism of increased immunogenicity and attenuated virulence of the vaccine, the proviral genomic DNA of an EIAV vaccine strain, EIAV(DLV121) was analyzed and compared with the genome of a parental virulent strain EIAV(DV117). Full length viral genomic DNAs were amplified as two segments by LA-PCR and were cloned. Because of the genomic diversity of retroviral quasispecies, 10 full-length sequences of EIAV(DLV121) and 4 full-length sequences of EIAV(DV117) from randomly picked clones were analyzed. Results showed that the average length of the complete nucleotide sequence of EIAV(DLV121) was 8,236bp and EIAV(DV117) was 8,249bp, with the inter-strain diversity of 2.8%. As for individual genes between the vaccine and virulent strains, the differences in nucleotide sequence of S2, LTR and env were significantly higher than the other genes with the diversity of 4.1%, 3.7% and 3.1%, respectively. Considerable variations in deduced amino acid sequences were found in S2, S3 and env. The diversities were 10.4%, 5.6% and 4.8%, respectively. Furthermore, the LTR of EIAV(DLV121) consisted of at least 5 subtypes grouped by their nucleotide sequences. There were two additional N-linked glycosylation sites in the deduced amino acid sequence of EIAV(DV117) gp90 than that of EIAV(DLV121). Among glycosylation sites in the gp90 of virulent strain, 3 were found unique only in EIAV(DV117), of which 2 were located in the principle neutralizing domain (PND). In addition, there was one EIAV(DLV121) -specific glycosylation site, which was positioned in the PND, too. Taken together, it is clear that greatly increased genomic diversity exists in the EIAV vaccine strain, which provides important information for the further study on biological characters of the Chinese EIAV attenuated vaccine.
Amino Acid Sequence ; Animals ; Base Sequence ; Equidae ; Genome, Viral ; Infectious Anemia Virus, Equine ; chemistry ; genetics ; immunology ; Leukocytes ; immunology ; virology ; Molecular Sequence Data ; Sequence Alignment ; Vaccines, Attenuated ; chemistry ; genetics ; immunology ; Viral Proteins ; chemistry ; genetics ; immunology ; Virulence

OBJECTIVETo investigate the effects of epigallocatechin-3-gallate (EGCG) on proliferation and cell cycle of acute promyelocytic leukemia NB4 cell line and to clarify the molecular mechanism.

METHODSNB4 cells were treated with 0,50,75,100 and 125µmol/L of EGCG for 24, 48, 72 and 96 h, respectively. The proliferation level of NB4 cells was measured by CCK-8 assay. The cell cycle progression of NB4 cells was assayed by flow cytometry. The mRNA expression levels of DNMT1, DNMT3a and DAPK1 were detected by RT-PCR. The methylation status of gene was tested by methylation specific PCR, and the expression level of DAPK1 protein was detected by Western blot.

RESULTSThe proliferation and cell cycle progression of NB4 cells treated with EGCG were inhibited and showed the characteristic of time-dependent and dose-dependent manner. The expression level of DAPK1 and DNMT3a decreased in NB4 cells treated with EGCG. The expression level of DAPK increased in NB4 cells treated with EGCG, while the methylation of DAPK1 gene decreased.

CONCLUSIONEGCG inhibits the proliferation and cell cycle progression of NB4 cells by inhibiting the expression of DNMT1 and DNMT3a and down-regulating the methylation status of DAPK1 gene.