2.Study of ocular surface macro genome in dry eye patients
Hong CHEN ; Xiaofeng WEN ; Yuhua DENG ; Lai WEI ; Guanghua PENG
Recent Advances in Ophthalmology 2017;37(2):129-132
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.
3.Effects and mechanism of Cx43 in cancer.
Shanli LIN ; Huan WEN ; Hong DENG
Chinese Journal of Pathology 2014;43(1):62-64
Animals
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Apoptosis
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Cell Cycle
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Cell Movement
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Cell Proliferation
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Connexin 43
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genetics
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metabolism
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Down-Regulation
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Gap Junctions
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metabolism
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physiology
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Humans
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Neoplasms
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metabolism
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pathology
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Tumor Suppressor Proteins
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genetics
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metabolism
4.Effect and prognosis of nimodipine on the patients with severe traumatic brain injury
Jian-hong ZHANG ; Jian-zhong FAN ; Ai-wen DENG
Chinese Journal of Rehabilitation Theory and Practice 2002;8(9):537-538
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.
5.Bioinformatics-based Design of Peptide Vaccine Candidates Targeting Spike Protein of MERS-CoV and Immunity analysis in Mice.
Jiaming LAN ; Shuai LU ; Yao DENG ; Bo WEN ; Hong CHEN ; Wen WANG ; Wenjie TAN
Chinese Journal of Virology 2016;32(1):77-81
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
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Antibodies, Viral
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immunology
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Computational Biology
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Coronavirus Infections
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immunology
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prevention & control
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virology
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Female
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Humans
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Immunization
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Mice
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Mice, Inbred BALB C
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Middle East Respiratory Syndrome Coronavirus
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genetics
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immunology
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Peptides
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administration & dosage
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genetics
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immunology
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Spike Glycoprotein, Coronavirus
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administration & dosage
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genetics
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immunology
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Viral Vaccines
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administration & dosage
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genetics
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immunology
6.Evaluation of the immunogenicity of recombinant replicative DNA vaccines expressing multiple anti-gens of hepatitis C virus in a mice model
Yao DENG ; Jie GUAN ; Xiao YIN ; Bo WEN ; Hong CHEN ; Wen WANG ; Wenjie TAN
Chinese Journal of Microbiology and Immunology 2015;(3):202-206
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.
7.The effect of smoking and smoking cessation on the phosphorylation of IKK-β in type 2 diabetic rats
Hong LIU ; Dan FANG ; Huifen YUE ; Hongming DENG ; Bihui MENG ; Zhongwei WEN ; Xiaofei SUN
Chinese Journal of Internal Medicine 2010;49(5):426-428
Objective To investigate the effect of smoking and smoking cessation on the phosphorylation of IKK-β in type 2 diabetic rats. Methods Forty-two six-week-old Wistar rats were randomly divided into 4 groups: normal control(NC, n =7), diabetes control (DC, n =7), diabetes with smoking (DS, n = 14) and diabetes with smoking cessation(SC, n = 14). Rats in DS and SC groups were further assigned randomly into 8w and 12w subgroups. DS group was given passive smoking twice a day for 8 or 12 weeks, while SC group ceased passive smoking for 4 weeks after 8 or 12 weeks of smoking . Western blot method was used to detect the level of IKK-13 phosphorylation in skeletal muscle. Results Compared with the NC group,the phosphorylation of IKK-β protein in DC group was increased (0. 16±0. 05 vs 0. 30±0. 08, P < 0. 01). There was an increasing trend with the phosphorylation level of IKK-β in the DS (8w) subgroup, but there was no statistical difference between the DC group and SC(8w) subgroup (0. 40±0. 09 vs 0. 30±0. 08,0. 36±0. 10, P >0. 05). The phosphorylation level of IKK-β in DS(12w) group increased obviously, being significantly higher than that in the DC group and SC (12w) subgroup(0. 74 ± 0. 11 vs 0.30±0.08,0.35±0.07,P < 0.01). Conclusion With the prolongation of smoking duration, the phosphorylation of IKK-β in type 2 diabetic rats increased. After smoking cessation, the phosphorylation of IKK-β decreased. The phosphorylation of IKK-β may be involved in the mechanism by which smoking causes type 2 diabetes.
8.Influences of Human Cytomegalovirus on Proliferation of Lymphocyte Progenitor and Its Interference Methods
hong-ying, LI ; wen-jun, LIU ; qu-lian, GUO ; zheng-hua, DENG ; jiang, LIN
Journal of Applied Clinical Pediatrics 2003;0(10):-
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
9.Therapeutic effect of collagen from Cyanea nozakii on adjuvant arthritis in rats
Wen-Tao ZHANG ; Lu-Hong TANG ; Wei CHEN ; Dong-Qun CHEN ; Chao DENG ;
Chinese Journal of Marine Drugs 1994;0(04):-
Objective To investigate the suppressive effects of collagen from Cyanea nozakii on adjuvant induced arthritis inrat.Methods Rats with adjuvant arthritis received different do- ses of Cyanea nozakii collagen by intragastric administration for two weeks.Incidence and severity of arthritis were assessed by calculation of mean arthritis index,the concentrations of NO,MDA and activity of SOD in the serum were examined.Results Cyanea nozakii colla- gen at different doses could ameliorate the adjuvant induced arthritis,suppress the concen- trations of NO,MDA and increase the activity of SOD in the serum.Conclusion Cyanea noza- kii collagen has therapeutic efficacy in treatment of adjuvant arthritis rats,and the mecha- nism of Cyanea nozakii collagen is probably related to the antioxidation.
10.Effects of various prime-boost regimes on immunities in mice by using DNA and reocmbinant vaccin-ia-based H5N1 vaccines
Wen WANG ; Hong CHEN ; Yao DENG ; Yang YANG ; Jianfang ZHOU ; Yuelong SHU ; Wenjie TAN
Chinese Journal of Microbiology and Immunology 2014;(9):668-672
Objective To develop an effective and broad immune protective vaccination strategy by using DNA and recombinant vaccinia-based H5N1 vaccines.Methods BALB/c mice were immunized with various prime-boost regimens by using different DNA ( pIRES-based or pVRC-based) and recombinant vaccinia (Tiantan strain, rTTV)-based H5N1 vaccines expressing multivalent antigens (HA, NA, M1 and M2).The differences of immunity induced by two DNA vaccines were compared between intradermal electro -poration (IDE) and intramuscular electroporation (IME) deliveries.Immune responses were analyzed by hemagglutination inhibition( HAI) assay, neuraminidase ( NA)-specific antibody measured by ELISA , mi-croneutralization assay and IFN-γELISPOT assay .Results High levels of humoral immunity and T cell re -sponses were induced in mice primed with DNA-based vaccine than those primed with rTTVb-ased vaccine . DNA priming by IDE resulted in higher levels of neutralizing antibody in mice than those by IME delivery . Higher levels of HAI and anti-NA antibodies as well as NA-specific T cell responses were induced by pVRC-based DNA prime than those by pIRES-based DNA prime .HA-specific T cell responses were also enhanced in mice primed with pVRC-based DNA than those primed with pIRES-based DNA by IME .Conclusion The prime-boost strategies by using DNA-based vaccine in combination with rTTV-based H5N1 vaccine could induce humoral and T cell responses in mice against multi-antigens .Immunities induced by vaccines in com-bination might be modulated by various prime regimes .The study provided references for the further develop-ment of novel H5N1 vaccine and the optimization of immunization programs of combined multi-antigen vac-cine candidates .