Objective To study the regulation effect of estrogen in expression of matrix metalloproteinase-9 (MMP-9) in the central nervous system (CNS) in mice with experimental autoimmune encephalomyelitis ( EAE).Methods The 60 mice were overiectomized and 2 weeks later EAE was induced with MOG35-55 peptide in these mice.They were divided into a treatment group and a control group.The treatment group was treated with estrogen and the control group was given PBS.Clinical symptoms in these two groups were scored and compared.HE staining was used to observe inflammation in the brain and spinal cord.The MMP-9 expression in the CNS was examined by quantitative real-time PCR and immunofluorescence staining.Results The incidence of disease was lower (treatment and control group were 8/30 and 28/30 respectively) and clinical symptoms were milder (treatment and control group were 3.23±0.83 and 1.62 ±1.00 respectively,t=3.811 and P＜0.05) in the treatment group than those in the control group.HE staining showed the decreased infiltration of inflammatory cell in the treatment group (Treatment group:inflammatory score were 0.895 ±0.206,0.752 ±0.302,0.732 ±0.183 in acute,relief and chronic phase respectively;Control group:inflammatory score were 3.472 ±0.635,2.881 ±0.662,1.891 ± 0.482 in acute,relief and chronic phase respectively.t = 8.622,6.543 and 5.027,all P ＜ 0.05).The quantitative real-time PCR and immunofluorescence staining showed that the expression of MMP9 in the CNS was decreased in the treatment group.Conclusion Estrogen may decrease MMP-9 expression in the CNS,reduce inflammation and clinical symptoms in mice with EAE.

OBJECTIVE:To investigate the occurrence of ADR induced by Shuxuening injection in Beijing area,and to pro-vide reference for rational drug use in clinic. METHODS:ADR induced by Shuxuening injection in Beijing area during 2003-2013 was classified statistically in respects of population,organs/systems involved in ADR,clinical manifestations,occurrence time, drug combination and prognosis. RESULTS:Of 1648 ADR cases,the incidence of ADR in the elderly patients was higher than young patients,and that of female patients (60.92％) was higher than that of male patients (39.14％). Multiple organs/systems were involved in Shuxuening injection-induced ADR,and top 3 were nervous system (422 cases,21.33％),skin and its appen-dants (411 cases,20.78％) and others (305 cases,15.42％). Clinical manifestations were skin rash,itching,dizziness and ner-vousness,palpitation,arrhythmia,etc. ADR mostly occurred within 5-30 min after medication. In ADR reports,there were a vari-ety of drugs combined with Shuxuening injection. Shuxuening injection combined with Alprostadil injection was most common(61 cases,accounting for 23.46％ of drug combination). Among 1648 ADR cases,there were 622 cured cases and 1039 cases im-proved,4 cases were not improved,3 cases had sequelae and 1 case died. CONCLUSIONS:Clinical application of Shuxuening in-jection should strictly follow the indications of drug package inserts;differentiation of symptoms and signs is based on specific dos-age,solvent,route of administration,etc. It is necessary to strengthen the prescription check,and strengthen the observation after medication especially for the elderly and other special groups so as to reduce and avoid ADR.

Objective To analyze the effects of severe neonatal asphyxia on various organ-systems and to identify the risk factors associated with the resultant injuries and death. Methods The data of 170 cases in the last 10 years from January 1993 to March 2004 were analyzed. The risk factors associated with death were subjected to odds ratio (OR)analysis with the SAS software. Results There were 22 deaths in the 170 cases ( 12.5% ). Organ-system injuries were evident in 165 of 170 cases (97. 1% ). In descending orders, the organ-system injuries were central nervous system [ CNS,66.5% (113/170) ], pulmonary [62.9% (107/170) ] and metabolic disorders [50.6% (86/170) ]. The severity of injuries was in the reversed orders from metabolic disorders, pulmonary to CNS. From high risk to low, the factors which affected the mortality of severe asphyxia were, in order, severe CNS injury, ≥ 1 organ/system injury, respiratory failure,metabolic abnormality, electrolyte imbalance, blood-gas abnormality, pulmonary involvement, 10 min Apgar score ≤ 3,gestational age ＜ 37 weeks, hepatic involvement, cardiac involvement, raised PCO2, and hematologic involvement.Conclusions Organ-system injuries in addition to hypoxic-ischemic encephalopathy (HIE) were complications found in the majority of the cases with severe neonatal asphyxia. The risk factors such as CNS injury or HIE, pulmonary dysfunction and failure, and multiorgan dysfunction syndrome (MODS) involving more than three organ-systems should be detected and recognized early so that early intervention can be instituted to reduce the mortality.

Objective To investigate the correlation between the uptake of 68Ga-DOTATATE in pituitary adenoma and clinical parameters such as hormonal hypersecretion,and to evaluate the curative effect with 68Ga-DOTATATE imaging after octreotide therapy in patients with growth hormone-secreting adenoma (GH adenoma).Methods A total of 34 patients (15 males,19 females) with pituitary adenoma were recruited,including 5 adrenocorticotropic hormone-secreting adenoma (ACTH adenoma),17 GH adenoma,and 12 non-functioning adenoma (NF adenoma).In the 17 patients with GH adenoma,there were 13 patients treated by octreotide intramuscular injection 3 times with a total dose of 60 mg for 3 months.The finial diagnosis was based on histology.68Ga-DOTATATE imaging was performed,and SUV tumor volume and density index (DI) were recorded in all patients.The DI was the ratio of tumor SUVmean to tumor volume.The effective therapy was defined as more than 50％ of hormonal suppression or more than 20％ of tumor shrinkage.Non-parametric Mann-Whitney u test was used.Results NF adenoma showed greater tumor volume than secretory adenoma,((9.10±7.00) cm3 vs (2.92±1.60) cm3,u=43.0,P＜0.05),whereas DI of secretory adenoma was higher than that of NF adenoma (7.16±4.52 vs 1.08±1.40,u=48.5,P＜0.05).Additionally,DI was significantly higher(3.55±0.91 vs 1.38±0.69,u =2.0,P＜0.05) in patients (n =8) with effective treatment than that in patients without effective treatment (n =5).Conclusion 68 Ga-DOTATATE may be a useful probe for PET imaging in patients with pituitary adenoma,and may be valuable for predicting the therapeutic effect of somatostatin analog treatment.

Objective To study the significance of the sample S/Co ratio when using a domestic reagent for anti-hepatitis C virus(HCV)antibody detection and to explore the procedure and standard of anti-HCV antibody diagnosis by using this domestic reagent.Methods Anti-HCV antibody was detected in 295 000 blood donors by a domestic anti-HCV reagent with enzyme-linked immunosorbent assay(ELISA)method and the reactive samples were tested again by ortho anti-HCV antibody reagent.The samples which anti-HCV antibodies were determined as positive by ortho anti-HCV rea- gent were examined by recombinant immunoblot assay(RIBA)reagent and 106 samples of them were also tested for HCV RNA.Results Six hundred and eighty-one samples were reactive in 295 000 samples screened by the domestic ELISA reagent,the reactive ratio was 0.23 %.Among the reactive samples screened by the domestic ELISA reagent,367 samples were determined as positive by ortho anti-HCV reagent while 66.2% of them showed a S/Co ratio≥3.8.The consistency rate between positive results determined by the domestic reagent and RIBA reagent respectively was 53.8%.For the samples showing S/Co ratio≥3.8 by ortho anti-HCV reagent,94.2% had a S/Co ratio≥8.0 when using the domestic ELISA reagent,while the percentage of samples showing S/Co ratio

ObjectiveTo rapidly detect the mutation frequency of DBC2 gene 7776C ＞ T in breast cancer and breast fibroadenoma by applying the mutation-sensitive molecular switch ( comprised of high-fidelity DNA polymerase and phosphorothioate-modified allele-specific primers) and agarose gel electrophoresis.Methods Allelic specific primers targeting mutation type and wild type were designed with the primers'3'terminal phosphorothioate modification.When the primers matched with the tissue DNA,the primers could be extended with highfidelity polymerase; when they mismatched with the tissue DNA,the primers could not be extended.DNA samples from 85 cases of breast cancer and 10 cases of breast fibroadenoma tissues were chosen and analyzed by PCR amplifications mediated by high-fidelity DNA polymerase.Gel imaging system was employed to make analysis of PCT products.ResultsThe mutation-sensitive molecular switch system showed that the mutation rate of 7776C ＞ T was 2.4％ ( 2/85 ) in the 85 cases of breast cancer,and no mutation was found in the 10 cases of breast fibroadenoma.ConclusionsThe mutation-sensitive molecular switch combined with agarose gel electrophoresis can rapidly detect the mutation of breast cancer DBC2 gene 7776C ＞ T.It is applicable in single nucleotide polymorphisms assay and has enormous application value in detecting gene mutation.

To study the ecological distribution and diversity of endophytic fungi associated with Ferula of medicinal plants in Xinjiang. The endophytic fungi were isolated from roots, stems and leaves of Ferula by microbiology research methods and technology. The endophytic fungi were identified using ITS rDNA sequence analysis and morphology analysis. The composition, diversity and preference of endophytic fungal community were analyzed with Shannon-Wiener biodiversity index (H') and Sorensen coefficient (Cs). A total of 337 strains endophytic fungi were isolated and classified into 38 genera, Alternaria, Aureobasidium and Fusarium were the dominant genera. Among the 337 isolates, the endophytic fungi of F. sinkiangensis were the most, The Shannon-Wiener biodiversity index (H') associated with roots of F. fukanensis was the highest, reached 1.85. The highest Sorensen coefficient ( Cs) was between leaf of F. sinkiangensis and leaf of F. ovina, reached 0.75. From the result, endophytic fungi were widely distributed in six Ferula, there are some notable differences between distribution and composition of the endophytic fungi isolated from different issues and different species of Ferula, show a certain degree of species and tissue preference. The results obtained in this study will provide realistic basis and theoretical basis for further study the secondary metabolites of endophytic fungi associated with Ferula, and the relationship between endophytic fungi and their host plants.
Biodiversity ; Ecology ; Endophytes ; isolation & purification ; Ferula ; microbiology ; Fungi ; classification ; isolation & purification ; metabolism

OBJECTIVE: To compare pattern-pulse multifocal visual evoked potential (PPmfVEP) with pattern-reversal multifocal visual evoked potential (PRmfVEP), and to investigate the symmetry of mfVEP between both eyes in normal individuals. METHODS: The multifocal Vision Monitor was used to observe the mfVEP. T-test and ANOVA were used to analyze P1 wave, amplitude and signal noise ratios (SNR) of two mfVEPs. RESULTS: The SNR and the P1 amplitude reached the maximum at the central visual field and decreased with the increase of eccentricity, and then decreased slowly. The amplitude of the PPmfVEP was significantly smaller than the PRmfVEP in the central retina, while in the peripheral retina the result was exactly the opposite. SNR and amplitude of the PRmfVEP showed no statistical difference in both eyes (P > 0.05). The variance of the amplitude at the same side of visual field was larger than that at the symmetrical visual quadrant. CONCLUSION mfVEP can reflect the visual function in different parts of retina objectively and exactly. PPmfVEP reflect the vision function of the central retina better than PRmfVEP. The stability of PPmfVEP is better than PRmfVEP in the central retina, while the result is opposite in the peripheral retina. The mfVEP is symmetrical in both eyes of the same individual.
Evoked Potentials, Visual/physiology* ; Humans ; Neurologic Examination ; Reference Values ; Retina ; Sensitivity and Specificity ; Visual Fields/physiology*

Abstract: Objective　To investigate the diagnostic efficacy of rifampin-resistant real-time fluorescent quantitative nucleic acid amplification detection technology (GeneXpert MTB/RIF) in bronchoalveolar lavage fluid (BALF) combined with peripheral blood tuberculosis infection T cell spot test (T-SPOT) and tuberculosis antibody (TB-Ab) in smear-negative pulmonary tuberculosis. Methods　The clinical data of 114 cases of clinically diagnosed smear-negative pulmonary tuberculosis, 80 cases of non-tuberculous pulmonary diseases and 22 cases of smear-positive pulmonary tuberculosis in our hospital from January 2019 to January 2021 were retrospectively analyzed. The detection results of peripheral blood T-SPOT, TB-Ab and BALF GeneXpert in the three groups were analyzed. The sensitivity, specificity, negative predictive value, positive predictive value, false negative rate, false positive rate and Youden index of the three detection methods were compared. The differences in the positive detection rate of smear-negative pulmonary tuberculosis between the separate detection and the combined detection of the three methods were compared. The receiver operating characteristic curve (ROC) was performed to calculate the area under the curve (AUC). Results　The sensitivity of BALF GeneXpert and peripheral blood T-SPOT and TB-Ab was 66.91%, 80.88% and 90.44%, respectively. The specificity was 98.75%, 73.75% and 41.25%, respectively; the diagnostic coincidence rates were 78.70%, 78.24% and 72.22%, respectively, which were higher than 70.00%. In the smear-negative pulmonary tuberculosis group, the positive detection rates of these three methods in the smear-negative pulmonary tuberculosis group were 63.15%, 79.82% and 90.35%, respectively, and the differences were statistically significant compared with those in the non-tuberculosis pulmonary disease group (all P<0.01). The positive detection rate of the three combined methods in the smear-negative pulmonary tuberculosis group was 96.49 %, which was significantly higher than that of TB-GeneXpert method and T-SPOT, and the differences were statistically significant (χ2=37.283, P<0.01; χ2=13.612, P<0.01); the Youden index of combined detection was significantly higher than that of single detection, and the AUC of combined detection was 0.977, which was significantly higher than that of single detection. Conclusion　BALF GeneXpert combined with peripheral blood T-SPOT and TB-Ab can significantly improve the diagnostic rate of bacterial-negative pulmonary tuberculosis, providing a strong basis for guiding clinical treatment.

OBJECTIVETo study the oral normal bacteria adherence on polymethyl methyacrylate (PMMA) containing silver-supported silicate inorganic antibacterial, and the growth inhibitory concentration of silver-supported silicate inorganic antibacterial to normal oral bacteria were also investigated.

METHODSA certain volume of normal oral bacteria was inoculated on the RHI plate containing different dilution of silver-supported silicate inorganic antibacterial, then the growth of the bacteria was investigated by light microscope and biochemical methods; the oral bacteria plaque model in vitro was used to evaluate the adherence of 4 species normal oral bacteria mixture on the surface of PMMA which containing silver-supported silicate inorganic antibacterial in the proportion of 5% or 10%.

RESULTSThe growth of normal oral bacteria was inhibited effectively by silver-supported silicate inorganic antibacterial within the concentration of 8%, and the growth of Porphyromonas gingivalis and Conclida albicans were inhibited at concentration from 1.25% to 2.50%, but the PMMA containing silver-supported inorganic antibacterial could not prevent the adherence of bacteria within a period of 16 days.

CONCLUSIONSilver-supported silicate inorganic antibacterial has effectiveness on inhibiting the growth of normal oral bacteria, but could not prevent the adherence of oral normal bacteria mixture.