Female ; Humans ; Infant ; Lung ; physiopathology ; Male ; Pneumonia, Viral ; physiopathology ; Respiratory Function Tests ; Respiratory Syncytial Virus Infections ; physiopathology ; Respiratory Syncytial Viruses

Objective To investigate the difference in ocular surface microbiota between dry eye patients and healthy subjects,and discuss the role of microbiota in dry eye.Methods Twenty cases of dry eye patients and 90 cases of healthy subjects were collected in the PLA General Hospital and Zhongshan Ophthalmic Center.The samples of conjunctiva impression cytology were collected from all subjects,and then metagenomic shotgun sequencing was performed following the DNA extraction.The differences in alpha diversity and metabolic pathways of the ocular surface microbiota between dry eye patients and healthy subjects were evaluated.Results There was no significant difference in alpha diversity of the microbial community between dry eye patients and healthy subjects (P =0.13).However,an increase of 15 species and a decrease of 10 species were detected on the ocular surface of dry eye patients.The enriched antibiotic resistance genes in dry eye patients were more than healthy subjects.Conclusion Although the alpha diversity of the microbial community on ocular surface between dry eye patients and healthy subjects are not distinguishable,a significant difference could be found in relative abundance and metabolic pathways,suggest that these specific microbiome may be related to the pathogenesis and disease progression of dry eye.

Animals ; Apoptosis ; Cell Cycle ; Cell Movement ; Cell Proliferation ; Connexin 43 ; genetics ; metabolism ; Down-Regulation ; Gap Junctions ; metabolism ; physiology ; Humans ; Neoplasms ; metabolism ; pathology ; Tumor Suppressor Proteins ; genetics ; metabolism

ObjectiveTo observe the therapeutic effect and prognosis of nimodipine on severe traumatic brain injury. Methods64 patients with severe traumatic brain injury were divided into the nimodipine group(32 cases) and the routine treatment group(32 cases). The Glasgow Coma Scale(GCS) was assessed before and after the treatment. The Activities of Daily Living(ADL) and cognitive ability were evaluated in clear-headed patients. After 6 months follow-up, the Glasgow Outcome Scale (GOS), Bathel index and Mini Mental State Examination (MMSE) score were carried on.ResultsIn both of the two groups, GCS score were increased distinctively after treatment. The MMSE score in nimodipine group was higher than that of routine treatment group. There was no statistic difference in GOS and ADL between two groups after 6 months, but MMSE in nimodipine group was higher than that of routine treatment group. Conclusions Nimodipine could be helpful in cognitive function. The prognosis of severe traumatic brain injury lied on the degree of cerebral damage.

Middle East respiratory syndrome coronavirus (MERS-CoV) was identified as a novel human coronavirus and posed great threat to public health world wide,which calls for the development of effective and safe vaccine urgently. In the study, peptide epitopes tagrgeting spike antigen were predicted based on bioinformatics methods. Nine polypeptides with high scores were synthesized and linked to keyhole limpet hemocyanin (KLH). Female BALB/C mice were immunized with individual polypeptide-KLH, and the total IgG was detected by ELISA as well as the cellular mediated immunity (CMI) was analyzed using ELIs-pot assay. The results showed that an individual peptide of YVDVGPDSVKSACIEVDIQQTFFDKTWPRPIDVSKADGI could induce the highest level of total IgG as well as CMI (high frequency of IFN-γ secretion) against MERS-CoV antigen in mice. Our study identified a promising peptide vaccine candidate against MERS-CoV and provided an experimental support for bioinformatics-based design of peptide vaccine.
Animals ; Antibodies, Viral ; immunology ; Computational Biology ; Coronavirus Infections ; immunology ; prevention & control ; virology ; Female ; Humans ; Immunization ; Mice ; Mice, Inbred BALB C ; Middle East Respiratory Syndrome Coronavirus ; genetics ; immunology ; Peptides ; administration & dosage ; genetics ; immunology ; Spike Glycoprotein, Coronavirus ; administration & dosage ; genetics ; immunology ; Viral Vaccines ; administration & dosage ; genetics ; immunology

Objective To investigate the immunogenicity and cross protective effects of two novel HCV DNA vaccines in a mice model.Methods Two self-replicating alphavirus vector-based HCV DNA vaccines, pSCK CE1E2Y and pSCK H155, were constructed based on the genes encoding the structural pro-teins (Core, E1 and E2) and structural and NS3 fusion proteins (Core, E1 , E2 and NS3) of a HCV strain isolated from a Chinese patient (genotype 1b, Hebei strain), respectively.Western blot analysis was per-formed to detect the expression of fusion antigens.The BALB/c mice were intradermally immunized with the recombinant DNA vaccines by using electroporation.The immune responses induced in mice and the cross protective effects of the recombinant DNA vaccines were evaluated.Results The DNA vaccines effectively expressed the target antigens in vitro.The antigen-specific antibody responses and specific T cell immune re-sponses were induced in mice by the immunization of replicative DNA vaccines.However, no effective cross protection was provided by either of the DNA vaccines in the surrogate challenge model based on a recombi-nant heterologous HCV (JFH1, 2a) vaccinia virus strain.Conclusion Although no effective cross protec-tion was observed, both of the two replicative DNA vaccines could induce strong humoral and cellular im-mune responses against multi-target antigens of HCV strains.This study has paved the way for further inves-tigation on the development of novel HCV vaccines.

Objective To evaluate MSCT appearance and impaction of Ⅴ, Ⅷ segments' hepatic venous congestion ( HVC ) on hepatic functional recovery in living donor liver transplantation (LDLT).Methods In this study, 83 patients undergoing LDLT in our hospital were included, all subjects received plain and contrast MSCT examinations at early stage (within 1 month) and later stage (3 months later) after LDLT. MSCT appearance of HVC was recorded, at the same time, gutamic pyruvic transaminase ( ALT),glutamic oxalacetic transaminase (AST), total bilirubin (TB) and prothrombin time (PT) of 1 to 7 days after LDLT between congestion group and non-congestion group were recorded and compared.Results Segments Ⅴ and Ⅷ congestion was identified by after LDLT CT scanning in 20 patients (24. 10% ). Congestion volume and congestion ratio was (218. 25 ± 130. 29) cm3 and 16. 68% ±8. 81%,respectively. HVC often appear as hypoattenuation on plain CT scan and arterial phase, mixed or hyperattenuation on portal vein phase. There was no significant difference of ALT, AST, TB and PT after LDLT between congestion group and non-congestion group (P ＞ 0. 05). Conclusions MSCT is a valuable method to evaluate Ⅴ, Ⅷ segments' HVC after LDLT, most HVC has no impaction on hepatic functional recovery in LDLT patients.

Objective To observe the impacts of the method of fortifying the spleen and supplementing Qi on the cellular immunity of chronic hepatitis B virus(HBV)carriers.Methods Asymptomatic HBV carriers group(ASC group,n=60)with HBV DNA positive were randomly divided into Fortifying the Spleen and Supplementing Qi decoction group(A group,n=30)and conventional treatment group(B group,n=30),the peripheral blood T lymphocyte subsets were detected with flow cytometey and compared with those of the healthy people(The normal control group,n=18).All the patients were treated,and 24 weeks after treatment the indexes were measured again.Results As compared with those of normal controls,the numbers of CD4+ T cells and CD8+ T cells were decreased significantly in HBV carriers(P＜0.01);There was a statistical significance between the values before and complete the treatment with the decoction of fortifying the spleen and supplementing Qi(P＜0.05 or P＜0.01),and compared with conventional treatment group,there Was a statistical significance(P＜0.05).Conclusion T-cell subset function was disturbed in the HBV carriers.The method of fortifying the spleen and supplementing Qi could improve the cellular immunity of carriers with chronic hepatitis B.

Objective To investigate the development strategy of novel T cell based vaccine against HCV infection.Methods BALB/c mice were primed with pSCK-based DNA vaccine and boosted with type 5 adenoviral vector-based vaccine, which expressed the structural proteins ( Core, E1 and E2) de-rived from a Chinese HCV patient (genotype 1b, Hebei strain).Enzyme linked immunospot assay (ELIS-POT) and intracellular cytokine staining ( ICS) were used to analyze the elicited antigen-specific immune re-sponses and the efficacy of cross-protection.Results Immunization of mice with the prime-boost vaccination strategy elicited stronger T cell immune responses against multiple HCV antigens than using the DNA vac-cines alone, especially the IFN-γ-secreting T cell responses against E1 protein as indicated by ELISPOT as-say.ICS data indicated that the prime-boost regimen elicited more TNF-α-producing CD4+and IFN-γ-produ-cing CD8+T cells against E1 protein and high levels of IFN-γ-producing CD4+and CD8+T cells against E2 protein in comparison with immunization with DNA vaccines.Moreover, the prime-boost vaccination was ca-pable of eliciting effective cross-protection in a surrogate challenge model based on a recombinant heterolo-gous HCV (JFH1, 2a) vaccinia virus.Conclusion The prime-boost vaccination using DNA and rAd5-based vaccine expressing HCV structural antigens induced significant cellular immune response and cross-protection in mice, suggesting the possibility of using it as a promising T cell based vaccine against HCV in-fection.

Objective To investigate the effect of human cytomegalovirus (HCMV) on proliferation of colony forming unit T-lymphocyte (CFU -TL)and its interference methods. Methods Normal CFU - TL culture was used as blank control. Normal CFU- TL culture system plus inactivated HCMV fluid as inactivated HCMV control. The dilution of 1:10,1:100,1:1000 were added into CFU -TL colonies culture system directly as infected group. Astragalus (AMI) and ganciclovir(GCV) were added into culture system with HCMV dilution of 1:10 as experimental group. By methylcellulose semi-solid culture, different concentrations of HCMV - AD1699 affect CFU-TL and interfered by astragalus AMI, GCV. CFU - TL were surveyed. The effect of HCMV on CFU-TL proliferation was measured by MTT; HCMV-AD169 DNA in CFU-TL was found by PCR. Results 1. Compared with control group, the numbers of CFU -TL in the HCMV infection groups decreased significantly(P