ObjectiveTo study the effect of 8 Hz infrasound on the expression of 5-hydroxytryptamine (5-HT) in rats' hippocampus and temporal cortex.Methods140 male SD rats were randomly divided into the control group, and experimental groups that exposed to infrasound of 8Hz,90dB,100dB and 130dB for 1,7,14,21,28,35,42 days. Experimental groups were exposed to infrasound for 2 hours each day. The control group was only placed in the infrasonic storehouse but without infrasound. Rats' brains were taken as soon as the exposure finished and strained by immunohistochemistry. The content of 5-HT in hippocampus and temporal cortex was detected under an optical microscope.ResultsInfrasound groups had less expression of 5-HT in hippocampus and temporal cortex than the control group (P<0.01), and the least were at the 28th day for 90 dB and 100 dB groups and the 21st day for 130 dB group. Then the expression of 5-HT had an increase in each group.ConclusionThe deceased expression of 5-HT in rats' hippocampus and temporal cortex could result from infrasound of 8 Hz. Rules of change are related to the parameter of infrasound and the 130 dB 8 Hz infrasound can induce greater changes compared with that of 100 dB and 90 dB.

Objective To investigate the hepatoprotective effect of silybin-phosphatidylcholine complex(SPC) in sepsis rats.Me-(thods) Fifty Wistar immature rats were randomly divided into 3 groups:normal control(10 cases),septic group(30 cases) and interfe-(rence) group(10 cases).In septic group and interference group,rats were treated by cecal ligation and puncture(CLP).Meanwhile,the interference group was given SPC before 2 hours of CLP and after 2 hours of CLP.Blood of rats was taken from all groups to determine the levels of serum tumor necrosis factor-?(TNF-?),interleukin-1(IL-1),alanine aminotransferase(ALT) and aspartate aminotransferase(AST) at varying intervals.Results The levels of serum TNF-?,IL-1,ALT and AST after CLP were significantly elevated in septic group compared with the normal control group(P

Objective To observe the protective effect of silybin-phosphatidylcholine compound(SPC) on acute liver damage induced by alpha-naphthylisothiocyanate(ANIT) in mice.Methods Forty mice were randomly divided into 4 groups:normal group,model group,SPCⅠgroup,SPCⅡgroup.Intragastric administration of 0.5% carboxymethylcelluloes-Na(CMC-Na) suspension were given to the normal and model group,and 2 quantities of SPC suspension(150 and 300 mg/kg) were respectively given to SPCⅠ and SPC Ⅱ groups for 1 week.At 12 h after last administration of SPC,all of groups besides normal were given ANIT(dissolved in peanut oil,(60 mg/kg)) by lavage and the normal group just only were given peanute oil by the same volume and same way.After 16 h of ANIT administration,the levels of serum alanine transferase(ALT),aspartate aminotransferase(AST),serum total bilirubin(TB),malondialdehyde(MDA) and superoxide dismutase(SOD) were detected by biochemical method.Results Serum levels of ALT,AST,TB and MDA markedly increased after ANIT was administered via intragastric tube,and the level of serum SOD also decrease.SPC could obviously inhibit the alteration of the activities of serum ALT,AST,TB,MDA and SOD(P

Objective To investigate the effects of intravenous immunoglobulin(IVIG) on apoptosis and necrosis of myocytes in mice with viral myocarditis.Methods Three hundreds and twenty Balb/c mice were randomly divided into 8 groups.Different courses of IVIG were given in varying time after virus inoculation,Chinese medicine Huangqi given in control group.The virus titer in myocardium、percentage of apoptosis and necrosis of myocytes were detected, myocardial histopathologic scores were counted.Results In every IVIG treatment group,the above 3 items were all significantly lower than that in virus control group and Huangqi group,as IVIG early long course group had the best effect.Conclusion IVIG may reduce the percentage of apoptosis and necrosis of myocytes and virus titer in myocardium in mice with viral myocarditis,the effects are better than that of Huangqi.

Objective To explore the effect of L-carnosine on neuronal cell apoptosis in young rats with experimental febrile seizures(FS).Methods Forty 15-day SD rats were randomly divided into intervention group(n=30)and FS group(n=10).Warm water was used to induce 10 times FS.The intervention group was divided into E,G and H group,10 rats in each group.Intraperitoneal injection of L-carnosine(250 mg/kg)was separately given to the rats in E group,G group and H group respectively after 30,60 and 120 min of seizure.FS group were induced FS,but they were not given intervention.The rats were sacrificed at 12 hours after the last seizure.Neuronal cell apoptosis was determined by terminal eoxynucleotidyl transferase-mediated dUTP nick end labeling(TUNEL)in situ cell death kit.TUNEL positive cells were stained and counted as apoptosis in hippocampus and cortex.Ultrastructural changes of apoptosis neurons were observed under the electron microscope.Results The neuronal cells apoptosis count was 25.37?1.95 in FS group,12.36?1.13 in E group,17.85?2.04 in G group,and 22.69?2.69 in H group.Neuronal apoptosis of FS group was apparently higher than that of interventional groups(F=10.75 P0.05).Under the electron microscope,neuronal damage on hippocampal CA1 area and dentate gyrus of FS group and H group was obviously higher than that of E group.Conclusions Early injection of L-carnosine would not only relieve neuronal apoptosis of repeated FS,but also play a role in the protection of neuronal cells.

0.05).Conclusions Early injection of L-carnosine would not only improve cerebral oxidative phosphorylation,relieve neuronal injury of repeated FS,but play a role in the protection of neuronal cells.

Objective To investigate the expression of vascular endothelial growth factor(VEGF)in synovium of rats with adjuvant arthritis and the relationship between the histopathologic score and the expression of VEGF.Methods Adjuvant arthritis was established in Wistar rats by inoculating complete Freund's adjuvant(CFA). We calculated the arthropathologic score and the expression of VEGF mRNA and protein at different stages after CFA inoculation.Results In model group the arthropathologic score and expression of VEGF protein in synovium increased significantly all the time (P

OBJECTIVETo identify the relationship between amino acid mutations in Neisseria gonorrhoeae isolates and their antibiotic resistance.

METHODSPI gene fragments of Neisseria gonorrhoeae from 17 clinical isolates were obtained with PCR amplification. They were cloned into the PCR cloning vector pBS-T to form pBS-T-PI and sequenced. The sequences of PI genes were analyzed. At the same time, minimum inhibitory concentration (MIC) of penicillin and tetracycline to these 17 isolates were measured and contrasted with the corresponding PI sequence.

RESULTSThe recombinants of PI gene from 17 clinical isolates of Neisseria gonorrhoeae were successfully constructed and sequenced. They were divided into PIA and PIB subtypes according to the results from blastn software by comparing the sequences with the GenBank. Mutations were found at the sites of 120 and 121. There were only some of the sequences having an aspartic acid (D) mutation on 120 and 121 sites, which was not the same as reported. On the other hand,there were two PI sequences,5-9 and 6-1, whose mutations on No. 120 were lysine, similar to those documented.

CONCLUSIONSome relationship between PI amino acids mutations at sites 120 and 121 in Neisseria gonorrhoeae isolates from Chengdu, China and their resistance to penicillin and tetracycline were found. However,further studies need to be done in the future to confirm this hypothesis.

Amino Acid Sequence ; Anti-Bacterial Agents ; pharmacology ; DNA Mutational Analysis ; DNA, Bacterial ; Drug Resistance, Bacterial ; Mutation ; Neisseria gonorrhoeae ; drug effects ; genetics ; isolation & purification ; Polymerase Chain Reaction

Objective To investigate the genetic etiologies in the 0 -3 years old infants with hearing loss and to analyze the interaction between genetics and environmental factors. Methods Total of 130 infants were performed detailed audiological evaluation as well as the detection of the popular deafness gene mutations in GJB2 gene, SLC26A4 and mtDNAI2SrRNA. Of them, 84 cases were performed the computer tomography or magnetic resonance imaging examinations. Results Of the 130 cases, 54 infants were diagnosed as large vestibular aqueduct syndrome, while seven of 130 were as auditory neuropathy and the others were diagnosed as sensorineural hearing loss. Considering of the risks of etiologies for hearing loss, 85 of them had the experiences of the high risk factors at birth(65.4% ,85/130), while 23 of them had the exposure of aminoglycoside antibiotics, and 13 had the family history background as well as two eases were from the consanguineous families. In the causative genes screening, 42 infants were caused by the mutations of SLC26A4 gene (32.3%), but 14 infants found the mutations in GJB2 gene (4.6%), and no infants carried the mutation in mtDNA 12SrRNA 1555G and 1494T points in our studies. Conclusions In our studies, about 36. 9% infants hearing loss cases can be found the mutations in SLC26A4 and GJB2 genes. It is essential to put the idea into the hearing evaluation combined with genetic testing for the diagnoses of heating loss. It is also helpful for exploring the etiologies of hearing loss and performing the target genetic consulting for decreasing the prevalence of deafness in the future.

Objective： To observe the effect of Qingkailing (QKL) on brain damage induced by glutamate, in order to seek for effective drugs for antagonizing neurotoxicity of glutamate. Methods：The number and morphological metrology of neurocytes in cerebral cortex and hippocampus were detected by MIAS-300 image analyser, electron microscope and immunohistochemical methods. Results：QKL could alleviate the glutamate induced accumulation of water and sodium in brain tissue，relieve the metrological and structural damage of cerebral cells in cortex and hippocampus, reduce the percentage of c-fos positive cell in brain. Conclusion： QKL could protect brain damage induced by glutamate, which might be related to the inhibition of QKL on the enhancement of c-fos gene expression induced by glutamate.