Adult ; Biopsy ; methods ; Bronchoscopy ; Humans ; Lung ; pathology ; Male ; Middle Aged ; Pneumoconiosis ; diagnosis ; pathology

OBJECTIVETo construct recombinant adenovirus containing codon-modified HPV16L1 gene, and evaluate systemic and mucosal immunological responses induced after immunization with the recombinant virus.

METHODSThe recombinant adenovirus rAd-mod.HPV16L1 was constructed by Admax kit. The C57 BL/6 mice were immunized by purified rAd-mod.HPV16L1 through different inoculation routes. The immunological effect was evaluated by testing the specific neutralizing antibodies in sera and vaginal secretions of immunized mice through indirect ELISA and neutralization assay based HPV pseudovirus.

RESULTSThe result showed that intramuscular immunization could induce good systemic immunity, but the mucosal immunity was too weak, and immunization via intranasal route could induce satisfactory immunity both in sera and vaginal secretions, while intravaginal immunization failed to induce any specific immunological responses either in sera or vaginal secretions.

CONCLUSIONThe recombinant adenovirus containing codon- modified HPV16L1 gene was successfully constructed. Immunization through intranasal route could induce satisfactory immunity both in sera and vaginal secretions, while intramuscular immunization could only induce high titer of neutralizing antibodies in sera.

Adenoviridae ; genetics ; Animals ; Antibodies, Viral ; analysis ; immunology ; Antibody Specificity ; Capsid Proteins ; genetics ; immunology ; Codon ; genetics ; DNA, Recombinant ; genetics ; Female ; Genetic Engineering ; Human papillomavirus 16 ; genetics ; immunology ; Mice ; Mice, Inbred C57BL ; Oncogene Proteins, Viral ; genetics ; immunology ; Vaccination

BACKGROUND: Mesenchymal stem cells are a kind of adult stem cells with self-renewal and multi-directional differentiation potential. These cells have the functions of immunoregulation, regulation of cell growth and repair of injury. In recent years, it has been found that when inflammatory injury occurs, mesenchymal stem cells can regulate the secretion of inflammatory factors, and function on the damaged region, thereby repairing and improving tissue damage caused by inflammation. OBJECTIVE: To review the immunoregulatory effects of mesenchymal stem cells on T lymphocytes, B lymphocytes, dendritic cells and natural killer cells when the body is in an inflammatory state. METHODS: A computer-based search of PubMed and CNKI was performed for articles published from 2000 to 2018 using the keywords of"inflammatory microenvironment, mesenchymal stem cell, immune response, T cell, B cell, DC, NK cell" in English and Chinese, respectively. Seventy-six articles related to the topic and with reliable arguments were finally included in result analysis. RESULTS AND CONCLUSION: The interaction between mesenchymal stem cells and inflammatory cells determines the result of tissue damage repair. In an inflammatory state, the biological characteristics of mesenchymal stem cells will undergo certain changes, but mesenchymal stem cells can still exert immunomodulatory effects by secretion of various soluble cytokines or via cell contact. There are still many problems to be further explored to facilitate better clinical application of mesenchymal stem cells.

To investigate the feasibility of using recombinant adeno-associated virus type 1 vector as prophylactic vaccine against HPV16 infection, rAAV1-mod. HPV16L1, the recombinant AAV1 vector containing codon-modified HPV16 L1 gene, was constructed. C57BL/6 mice were immunized with purified rAAV1 vector through intramuscular and intranasal inoculation routes, and the titer of neutralizing antibody was determined by neutralization assay based on HPV16 pseudovirus. The result shows that the single dose of rAAV1-mod. HPV16L1 can induce specific neutralizing antibody in serum through both inoculation routes. Compared with intranasal group, intramuscular group can induce higher titer of neutralizing antibody. Eliciting strong and prolonged neutralizing antibody in serum, the rAAV1-mod. HPV16L1 is one of promising HPV16 prophylactic vaccine candidates.
Animals ; Antibodies, Viral ; blood ; Capsid Proteins ; genetics ; immunology ; Dependovirus ; genetics ; Female ; Mice ; Mice, Inbred C57BL ; Oncogene Proteins, Viral ; genetics ; immunology ; Papillomavirus Vaccines ; administration & dosage ; immunology ; Vaccination ; Vaccines, Synthetic ; administration & dosage ; immunology

Objective To evaluate the immune potency of recombinant adenovirus combined with rAAV1 vector expressing HPV16L1 protein in mice. Methods The rAdV and rAAV1 vector containing cedon-medified HPV16L1 gene was constructed using Admax and AAVmax packaging system respectively. C57 BL/6 mice were immunized with purified rAdV and rAAV1 vector through intramuscular and intranasal inoculation routes,and the titer of neutralizing antibody was determined by neutralization assay based HPV16 pseudovirus. Results Intramuscular immunization by rAAV1-med. HPV16L1 or combined with tAd-reed. HPV16L1 can induce higher titer of neutralizing antibody in serum than that of other groups. The titer of neutralizing antibody of intranasal groups is significantly lower than that of intramuscular group,although the prime-boost atrategy using in intranasal group was effective to enhance the specific humoral immunity. Conclusion The rAAV1-med. HPV16L1 combined with tAd-reed. HPV16L1 can induce higher titer of neutralizing antibody in serum through intramuscular route than that of other groups at the 16th week after the first immunization.

Objective To summarize the clinical experience in the replacement of the damaged sec- ond metacarpophalangeal joint with the second metatarsophalangeal joint with a pedicle of dorsal pedis artery and great saphcnous vein.Methods The damaged second metacarpophalangeal joint,distal part of the sec- ond metacarpal and proximal part of the proximal phalanx were dissected.The metatarsophalangeal joint was transferred to the region of metacarpophalangeal joint of hand.The dorsal pedis artery was anastomosed to the radial artery,and the great saphenous vein was anastomosed to the cephalic vein at anatomical snuff-box.The dissected bones of the hand removed of the cartilage of joint and soft tissue were grafted back to the donor site of the foot.Results A 5～30 month follow-up study in 8 out of 11 cases showed that satisfactory functional recovery was achieved in clinical practice.The movement of second metacarpophalangeal joint was excellent. Conclusion The function of the second metacarpophalangeal joint can be effectively recovered by the trans- fer of the vascularized second metatarsophalangeal joint.

Objective　In a RCT study, the safety and efficacy of sabot (a slow-release salbuteral) and volmax (controlled-release salbuterol) were compared in bronchial asthma. Methods　40 patients with moderate to severe asthma were randomly divided into two groups and treated by sabot or volmax for 2 weeks. The FEV1%, peak expiratory flow (PEF), symptom score and use of rescue ventolin were measured to evaluate the effect of treatment. Results　After treatment FEV1%, PEF and symptom score improved and the need for inhaling short-acting beta 2-agonis in both groups reduced significantly. There was no difference of these improvement between two groups. Conclusion　The safety and efficacy of sabot for treatment of asthma was similar to volmax.

OBJECTIVETo compare the accuracy of 64-slice computed tomography and coronary angiography in the diagnosis of coronary atherosclerosis.

METHODSThe imaging data of both 64-slice computed tomography and coronary angiography in 65 patients were analyzed retrospectively.

RESULTSAmong the 455 coronary arteries evaluated, the sensitivity, specificity and accuracy of 64-slice computed tomography were 54.6%, 95.1%, and 85.5%, respectively.

CONCLUSION64-slice computed tomography has a good potential in the diagnosis of coronary atherosclerosis with excellent sensitivity and specificity.

Adult ; Aged ; Coronary Angiography ; Coronary Artery Disease ; diagnosis ; Female ; Humans ; Male ; Middle Aged ; Retrospective Studies ; Sensitivity and Specificity ; Tomography, Spiral Computed ; methods

BACKGROUNDUlcerative colitis (UC) is associated with differential expression of genes involved in inflammation and tissue remodeling. MicroRNA (miRNA) plays an important role in the pathogenesis of UC by regulating the gene expression at the post-transcriptional level and control crucial physiological processes. This study aimed to identify aquaporin 8 (AQP8) expression and its relationship with miRNA in UC patients.

METHODSHuman colon samples, in this study, were obtained from 20 patients with UC and 16 healthy subjects undergoing diagnostic colonoscopy at the Chinese People's Liberation Army General Hospital between December 2009 and June 2010. We screened different genes from UC tissues and healthy subjects using genome-wide microarray, quantitative reverse transcription-polymerase chain reaction (qRT-PCR) and Western blotting. Regulation of gene expression by miRNAs was assessed by luciferase reporter construct assays and transfection of specific miRNA mimics and inhibitor.

RESULTSWe identified that 1596 genes were increased and 1301 genes were decreased in UC patients compared to healthy subjects. Among them, we focused on the analysis of AQP8 which was decreased three folds in UC tissues (P < 0.01). The expression of AQP8 mRNA and protein were decreased in UC tissue and tumor necrosis factor (TNF)-α treated HT29 cells compared with controls (P < 0.05). We searched candidate target miRNAs of AQP8 through bioformatics and the luciferase report assay analysis indicated that miR-424, miR-195, miR-330, miR-612, and miR-16 which has complementary site in the 3-untranslated region (3'UTR) of AQP8 could decrease the relative luciferase activities by 10% - 45%.

CONCLUSIONAQP8 and its relationship with miRNAs may be involved in the pathogenesis of UC.

Adult ; Aged ; Aquaporins ; genetics ; Colitis, Ulcerative ; genetics ; Female ; Gene Expression Regulation ; HT29 Cells ; Humans ; Male ; MicroRNAs ; physiology ; Middle Aged ; Tumor Necrosis Factor-alpha ; pharmacology

Histone lysine methyltransferase EZH2 has been reported to be frequently overexpressed in hepatocellular carcinoma (HCC) tissues and associated with hepatocarcinogenesis. However, the exact mechanism of EZH2 up-regulation in HCC has not been determined. In this study, we used murine hepatocyte AML12 cells to investigate the role of hepatitis B virus X protein (HBx) in regulating the expression of mEZH2. Western blot analysis demonstrated that the expression level of mEZH2 protein in AML12 cells was up-regulated by HBx in a dose-dependent manner. To further investigate the mechanism of mEZH2 overexpression, the 2500 bp regulatory sequence upstream from the first exon of the mEZH2 gene was amplified from AML12 genomic DNA and constructed into a luciferase reporter plasmid. The luciferase activity of the mEZH2 promoter significantly increased in AML12 cells co-transfected with HBx plasmid, and deleting the -486/-214 promoter region decreased HBx-induced mEZH2 promoter activation by nearly 50%. The -486/-214 region was then analyzed in the TRANSFAC 6.0 database and a typical E2F1-binding site was found. Mutation of this E2F1-binding site or knockdown of E2F1 expression by RNAi led to a dramatic decrease in HBx-induced activation of the mEZH2 promoter and mEZH2 overexpression in AML12 cells. These results provide evidence that HBx up-regulates mEZH2 expression by transactivating the mEZH2 promoter through E2F1 transcription factor, thereby providing new epigenetic evidence for the carcinogenic effect of HBx.
Animals ; Binding Sites ; Cell Line ; E2F1 Transcription Factor ; genetics ; Enhancer of Zeste Homolog 2 Protein ; Hepatocytes ; cytology ; metabolism ; virology ; Histone-Lysine N-Methyltransferase ; genetics ; metabolism ; Mice ; Plasmids ; Polycomb Repressive Complex 2 ; Promoter Regions, Genetic ; genetics ; RNA, Small Interfering ; genetics ; Trans-Activators ; genetics ; metabolism ; Transfection ; Up-Regulation