Objective Research has indicated that hydrogen sulfide(H2S) can regulate the function of N-methyl-D-aspartate re-ceptors(NMDARs) in the brain, but its effect on brain resuscitation requires further investigation.The study was to speculate the effect of H2 S on brain resuscitation as well as the underlying mechanism of neuroresuscitation by investigating the effects of hydrogen sulfide and hypo-thermia on the expression of NR2A, NR2B and phospho-cAMP response element binding protein (p-CREB) of NMDARs in the hippocampus after global cerebral ischemia following by reperfusion. Methods 100 male SD rats were randomly divided into five groups(n=20):sham operation group, model group, mild hypothermia group, NaHS group, NaHS combined mild hypothermia group.Pulsinelli-Brierley four-ves-sel occlusion method was induced to build the injury rat model by reperfusion after global cerebral ischemia .After 15 minutes'ischemia, im-mediate injection of 14μmol/kg NaHS was performed intraperitoneally on NaHS group and NaHS combined mild hypothermia group , while skin cooling(rectal temperature=32-33℃) was done on mild hypothermia group and NaHS combined mild hypothermia group .6 hours late,r hip-pocampus were extracted from rat heads.Respectively, spectrophotometer was applied to measure the content of H2S, Western blot for the expres-sions of NR2 A,NR2 B and pC-REB, and RTP-CR for mRNA level of brain derived neurotrophic (BDNF). HE staining was also performed on brain tissues 72hours after reperfusion on 4 rats from each group to evaluate the pathological changes of pyramidal neurons in CA1 region. R esul ts The content of H 2 S increased in each of the four groups after ischemia-reperfusion compared with sham operation group ( 15.2 ±2.0 nmol/g) (P<0.05).In comparison to model group (25.2 ±3.5 nmol/g), NaHS group (37.5 ±4.0 nmol/g) and NaHS combined mild hypothermia group (38.7 ±4.4nmol/g ) resulted in significant high content of H2S(P<0.05), while mild hypothermia group(26.5 ±3.5nmol/g ) got a mild increase(P>0.05).The gray values of NR2A and NR2B in each group increased compared with sham operation group(P<0.05), re-sulting in NR2A/NR2B<1 in model group and mild hypothermia group while NR2A/NR2B>1 in NaHS group and NaHS combined mild hy-pothermia group.Compared with the expression of p-CREB(0.55 ±0.06) in model group, there were significant increases in mild hypother-mia group(0.99 ±0.15), NaHS group(1.05 ±0.12), NaHS combined mild hypothermia group(1.02 ±0.15)(P<0.05).Compared with the expression of BNDF mRNA(0.83 ±0.12) in model group, there were significant increases in mild hypothermia group (1.11 ±0.13), NaHS group(1.27 ±0.16), NaHS combined mild hypothermia group(1.35 ±0.16)(P<0.05).In comparison to model group, there were signifi-cant alleviation in the injury of pyramidal neurons in hippocampal CA1 region in mild hypothermia group, NaHS group, NaHS combined mild hypothermia group, with the best effect in NaHS combined mild hypothermia group . Conclusion Hydrogen sulfide combined mild hypo-thermia can selectively activate synaptic NMDA receptors and trigger the prosurvival CREB signaling pathway to exert brain resuscitation .

ObjectiveTo construct a mouse model for studying pathophysiology and mechanism of human Chlamydia trachomatis genital infection.MethodsInnate immunity-deficient C3H/HeJ female mice were infected intravaginally with human C.trachomatis serovar D urogenital isolates for screening the highest violent clinical strain.The clinical strain UT0603 as well as standard strain D/UW-3/CX were then used to reinfect na(i)ve mice,the lower genital tract shedding were monitored by swabbing every 3-7 day over the entire infection period by culture.Some mice were sacrificed at early infection stage to detection of in site Chlamydia growth by immunofluorescence assay,then all the mice were sacrificed at later infection stage to evaluate upper genital tract gross pathology and histopathological characterization.ResuIts In the lower genital tract,Chlamydia shedding time course were significantly prolonged in clinical strain infected mice.Chlamydia not only growth in the lower genital tract,the live organism also ascending and growth in the upper genital tissue.The gross appearance under naked eyes and dilation and inflammation scores under microscope all showed that the genital tract pathology from the clinical strain infected mice were much more severe than standard strain infected control mice.Conclusion Together,all these results demonstrated that a mouse model for Chlamydia genital infection was constructed.

Objective:To construct NMB0315 eukaryotic expression recombinant vector ,detect specific humoral and cellular immune response induced by the recombint DNA vaccine intramuscularly in female BALB /c mice,evaluate the immunocompetence and immunoprotection of the vaccine , so as to provide experimental basis for the development of a novel nucleic acid vaccine against N.meningitidis serogroup B .Methods: The whole NMB0315 gene was amplified by PCR from the standard strains MC 58 genomic DNA,cloned into a plasmid pcDNA3.1(+),identified by double digestion of the recombinant plasmid with restriction enzymes and se -quencing.The recombinant vector pcDNA 3.1 (+)/NMB0315 was transfected into eukaryotic COS-7 cells and RAW264.7 cells, the NMB0315 protein was detected by immunocytochemical method and Western blot respectively .The levels of specific humoral and cellular immune response were detected after inoculating in female BALB /c mice intramuscularly with the recombinant plasmid .The immune protective effect was investigated with the DNA vaccine and the bactericidal titer of the immune serum was deter mined by serum bactericidal assay ( SBA ) in vitro.Results: The recombinant pcDNA3.1 (+)/NMB0315 was effectively transcripted and expressed in eukaryotic cells and the specific humoral and cellular immune responses were induced in the inoculated mice .In the re-combinant pcDNA3.1(+)/NMB0315 group ,the levels of serum IgG,IgG1,IgG2a,IgG2b and IgG3 and genital tract sIgA were significantly higher than in controls ( P<0.001 ) .The stimulation index in the culture supernatant of the spleen lymphocytes of the vaccine group was higher than that of the control group (P<0.05).The ratios of serum IgG2a/IgG1 in the DNA vaccine group were less than 1.The bactericidal titer of the NMB 0315+CpG group reached 1:128 following three immunizations , the protection rate of the vaccine group was 70%against the N.meningitidis strain MC58.Conclusion:The NMB0315 nucleic acid vaccine could induce higher levels of humoral immunity and cellular immunity and showed effective protection against N .meningitidis serogroup B , the immune serum had strong bactericidal activity in vitro .

Objective To study the differences in retinoic acid receptor γ(RARγ) mRNA expression levels in blood leukocytes between antipsychotic-free and antipsychotic-naive schizophrenic patients and healthy control,especially in different genders. Methods Forty-three acute schizophrenic patients who were antipsychotic-naive or antipsychotic-free for at least three months (male = 34, female = 9) and 39 age- and sex-matched healthy subjects (male =25 ,female = 14) were included for blood leukocytes expression of RAR γ mRNA ,using real-time PCR technique. Results Kolmogorov-Smirnov Z analysis showed a significant increase of RARγ mRNA (P =0.041) level in blood leukocytes of pooled schizophrenic patients(0. 027 ± 0. 003) than in the healthy subjects (0. 020 ± 0.002). The elevation was mainly found in the female patients (0. 030 ± 0.003). Within-sex analysis showed that the female schizophrenic patients showed a trend increase (P = 0. 166) of RAR γmRNA expression compared with the male patients (0. 026 ± 0. 001) and exhibited greater RARγ mRNA expression (P = 0. 014)when compared with the female healthy subjects(0. 018 ±0.004). Conclusions The present findings showed an abnormal expression of leukocyte RARγ mRNA level in antipsychotic-free and antipsychotic-naive schizophrenia especially in the female patients. Blood RARγ markers could add to the diagnosis and individualized pharmacotherapy of schizophrenic patients ,especially the female patients.

Objective To investigate the specific humoral immune response and cellular immune response induced by DNA vaccine with Neisseria gonorrhoeae porin B (PorB) fused with B subunit of Escherichia coli heat-labile enterotoxin B (LTB) in mice. Methods Target genes of porB, ltB and ltB-porB were amplified by polymerase chain reaction (PCR) and cloned into eukaryotic vector pcDNA3.1(-). The recombinants were identified by PCR, enzyme digestion and DNA sequencing.The vectors were transfected into Hela cells, and expressed proteins were checked by cytoimmunofluorescence. Female BALB/c mice were intranasally immunized with recombination vectors. The humoral immune response and cellular immune response were detected by enzyme linked immunosorbent assay (ELISA) and methyl thiazolyl tetrazolium (MTT) colorimetric assay. The expressions of recombination vectors in intranasal mucosal tissues of the immunized mice were detected by immunohistochemistry. The means between groups were compared by analysis of variance. Results All the three recombinants were expressed in Hela cells and intranasal mucosal tissues. The PorB specific IgG in serum and sIgA in vaginal secretions in DNA vaccine immunized mice were significantly higher than those in controls (P＜0.01 ; P＜0.05). Moreover, the sIgA level in pcDNA3.1 (-)/ltB-porB group was higher than that in peDNA3, 1(-)/porB group (P＝0. 002). The levels of interferon-gamma (IFN-γ) and interleukin-4 (IL-4) in the supernatants and stimulation index (SI) of spleen lymphocyte culture in pcDNA3, 1(-)/porB group were (170.04±23.89) pg/mL, (114.68±14.27) pg/mL and 1. 68±0.19, respectively; and those in pcDNA3, 1(-)/ltB-porB group were (161.42±27.50) pg/mL, (124.16±19.04) pg/mL and 1.73±0.28, respectively; which were both higher than those in pcDNA3.1(-)/ phosphate buffered saliae (PBS) group (P＜0. 01; P＜0.05) and pcDNA3.1 (-)/ltB group (all P＜0.05), while there was no significant difference between pcDNA3.1 (-)/ltB-porB group and pcDNA3. 1 (-)/porB group (0. 998, 0. 696, 0. 994; all P＞0.05). Conclusions The constructed DNA vaccines are all successfully expressed in Hela cells and murine intranasal mucosal tissues. The mucosal immunization of the vaccines [pcDNA3. 1 (- )/porB and pcDNA3.1 ( -)/ltBporB] could induce humoral immune response and cellular immune response, especially mucosal immune response. It is confirmed that mucosal adjuvant LTB could promote PorB to induce higher level of mucosal immune response in mice.

Objective: To analyze the spatio-temporal distribution characteristics of new HIV/AIDS cases at ages of 50 years and older in Wenzhou City from 2006 to 2020, so as to provide insights into precise control of AIDS. Methods : The data of new HIV/AIDS cases aged 50 years and older in Wenzhou City from 2006 to 2020 were collected from the China Information System for Disease Control and Prevention. The temporal and spatial distribution characteristics of new HIV/AIDS cases at ages of 50 years and older were identified using global and local spatial autocorrelation analyses and spatial-temporal scan analysis. Results: Totally 1 917 new HIV/AIDS cases aged 50 years and older were detected in Wenzhou City from 2006 to 2020, and there were 179 new HIV/AIDS cases in 58 townships ( streets ) from 2006 to 2010, 643 cases in 113 townships ( streets ) from 2011 to 2015 and 1 095 cases in 147 townships ( streets ) from 2016 to 2020, respectively. The distribution of new HIV/AIDS cases appeared positive spatial autocorrelations from 2006 to 2010 ( Moran's I value=0.05, Z=1.976, P=0.046 ), from 2011 to 2015 ( Moran's I value=0.08, Z=2.314, P=0.028) and from 2016 to 2020 (Moran's I value=0.18, Z=3.956, P=0.003 ). Spatial-temporal scan analysis identified two clusters. The primary cluster mainly covered 70 towns ( streets ) in Lucheng Distrct, Ouhai District, Longwan District, Economic and Technical Development Region, Rui' an City and Pingyang County of Wenzhou City from January 1, 2014 to December 31, 2020, with a cluster radius of 34.30 km [log likelihood ratio ( LLR )=192.84, RR=2.60, P<0.001], and the secondary cluster was located in Hongqiao Township of Yueqing City from January 1, 2009 to December 31, 2015, with a cluster radius of 0 ( LLR=90.60, RR=7.27, P<0.001 ). Conclusions The number of new HIV/AIDS cases aged 50 years and older appeared a tendency towards a rise in Wenzhou City from 2006 to 2020, with spatial clusters that were predominantly identified in urban areas, Rui' an City and Pingyang County of Wenzhou City.

ObjectiveTo compare the effect of proprioceptive neuromuscular training methods on pain and motor ability of knee in patients with early knee osteoarthritis (KOA) . MethodsFrom November, 2022 to May, 2023, 60 early KOA patients from Beijing Bo'ai Hospital and community were randomly divided into groups A, B and C, with 20 patients in each group. Group A received proprioceptive neuromuscular facilitation (PNF), group B received neuromuscular exercise (NEMEX), and group C received PNF and NEMEX, for six weeks. They were assessed with Visual Analogue Scale for pain (VAS), angle reappearance test, difference of pre-motor reaction time (VM-VL), active range of motion (AROM) of knee flexion, 10-meter walk test (10MWT), and Knee Injury and Osteoarthritis Outcome Score (KOOS) before and after treatment. ResultsAll the indexes improved in all the groups after treatment (|t| > 2.532, P < 0.05). Among the groups, the VAS score was the least in group A, and then groups C and B; the angle reappearance error was the least in group C, and similar in groups A and B; the VM-VL was the least in groups A and C, followed by group B. ConclusionPNF, NEMEX and PNF+NEMEX can relieve the pain and improve the motor function of knee in patients with early KOA, however, PNF is the most effective on relieving pain, and PNF+NEMEX is the most effective on improving knee function.

Objective: To make etiological diagnosis and evaluate the protective effects of post-exposure prophylaxis(PEP) in an event of one dog injured seven persons. Methods: Direct immunofluorescence assay (DFA) and nested polymerase chain reaction (PCR) were employed to detect nucleoprotein and nucleoprotein(N) gene of rabies virus in the brain tissues of the dog, the positive samples were sequenced for the full length of N gene of rabies virus, then the homology of the N gene of rabies virus was analyzed after the phylogenetic tree was constructed. Rapid fluorescent focus inhibition test (RFFIT) was applied to detect the rabies virus neutralizing antibodies(RVNA) on day 0, 14 and 40 after PEP. Results: The cerebral, cerebellar and hippocampal tissues were positive by DFA and nested PCR. The phylogenetic tree indicated the rabies virus belonged to the rabies virus genotype I. The homology of the nucleotide and amino acid of the rabies virus N gene were over 86% with the vaccine strains. The titer of the RVNA increased significantly from the day 0 to day 14 after PEP, the lowest was 5.78 IU/ml and the highest was 26.15 IU/ml. On the day 40, the highest RVNA titer was 51.96 IU/ml. No rabies cases occurred in a one year follow-up visit. Conclusions Normative PEP can effectively prevent the occurrence of rabies cases.