Objective To investigate the relationship between hepatitis B virus (HBV) infection and cytokeratin 18 (CK18) phosphorylation.Methods Liver tissues were taken from 21 chronic hepatitis B (CHB) patients by liver biopsy and 14 healthy controls were collected.Immunofluorescence double staining and Western blotting were used to detect CK18 pSer33 and CK18 pSer52 phosphorylation.HepG2 cell line was transfected with either 1.3 mer HBV vector or empty control vector.CK18 pSer33 or CK18 pSer52 phosphorylation were tested using immunofluorescence double staining and Western blotting.Total mRNA was extracted from the cells.The expressions of cell division cycle 2 (cdc2) and protein kinase Cε (pKCε) were analyzed by realtime polymerase chain reaction relative quantification.Statistical analyzee were performed by using two-independent samples t test.Results Compared to healthy controls,phosphorylation of CK18 pSer33 in HBsAg stained hepatocytes was significantly higher in CHB patients (t=6.618,P=0.000).However,no difference was found in phosphorylation of pSer52 (t=2.429,P=0.051).Phosphorylation of CK18 pSer33 and expression of cdc2 mRNA in HBV transfected HepG2 were significantly higher in empty vector transfected HepG2 (t=5.365,P=0.006),while no difference was found in phosphorylation of pSer52 and expression of pKCε mRNA (t=1.098,P=0.334).Conclusion HBV infection is significantly associated with phosphorylation of CK18 pSer33.

Objective To describe the clinical characteristics,CD4+ and CD8+ T cell counts as well as human immunodeficiency virus (HIV) RNA of acute HIV infection in men who have sex with men,and their correlations with the disease progression.Methods One hundred cases of acute HIV infection were followed up.Nuclear acid sequence-based amplification (NASBA) was used for plasma HIV RNA screening.Flow cytometry was served to test the CD4+ and CD8+ T cell counts.Hepatitis B surface antigen (HBsAg) and anti-hepatits C virus (HCV) antibody were detected using enzyme-linked immunosorbent assay.Rapid plasma reagin was applied to screen for Treponema pallidum antibody.Antibody positive specimens were tested with Treponema pallidum particle assay for validation.The positive results were identified as infection.Results Ninety-six cases were aged between 20 and 50 years old.Among 100 cases,9 were HBsAg-positive; 4 were anti-HCV positive; 40 were co-infected with syphilis.During the follow-up period,the median CD4+ T cell counts in the 1st and 3rd month were 510/μL and 499/μL,respectively.The median HIV RNA in 1st,3rd,6th and 24th month were 4.37,4.00,4.31 and 4.43 lg copy/mL,respectively.CD8+ T cell counts did not show significant change during the study.Among 38 rapid progressors,the initial mean CD4+ T cell counts was (358.0± 134.6)/μL,which was significantly lower than that of the non-rapid progressors with a mean CD4+ T cell counts of (559.2±203.4)/μL.Meanwhile,the initial mean HIV RNA of the rapid progressors was 4.71 lg copy/ mL,while that of the non rapid progressor was 4.18 lg copy/mL.The initial CD8+ T cell counts of the rapid progressors and non rapid progressors were 1 250.1/μL and 1 247.2/μL,respectively.Conclusions Acute HIV-1 infected men who have sex with men tend to be young.The initial CD4+ T cell counts and HIV RNA during acute infection could be used to predict the disease progress.

Objective: To study the antitumor effects of transmembrane TNF-? and secretory TNF-? in vivo. Methods: Three types of TNF-? cDNA plasmids (wild type TNF-?; transmembrane TNF-? mutant; secretory TNF-? mutant) were directly injected into tumor-tearing mice. Results: The three types of TNF-? could be expressed by tumor cells and all of them could inhibit evidently the rate of tumor growth. The tumor regression after treatment with transmembrane TNF-? mutant at the early stage was more significant than that with the other two types of TNF-?( P

Objective To study the effects of self-made Chinese sherbal gargle on AIDS related oral lesion.Methods 353 hospitalized AIDS patients from June 2007 to December 2009 were divided randomly into the experimental group(179 patients)and the control group(174 patients).ALL the patients were treated with systemic anti-viral therapy while the experimental group was mouthwashed by self-made herbal gargle and the control group with normal saline solution.The incidence of new oral lesion and the changes of the originM lesion were observed.Results The incidence of new oral lesion in the experimental group was obviously lower than that of the control group.The cure rate and effective rate of original oral lesion were much higher than the control group.Conclusions Self-made herbal gargle shows good effect in preventing and treating the AIDS related oral lesion.

AIM: To compare the tumorigenecity of H22 cells transfected with TNF-? gene and its mutants (secreted TNF-? mutant, S-TNFm, transmembrane TNF-? mutant, TM-TNFm and wild type of TNF-?, Wt-TNF) in vivo . METHODS: Three kinds of mouse liver cancer cell line H22 expressing TNF-? and its two mutants were mixed with untransfected H22 at different effector/target ratio separately. The growth of tumor was examined after injection of 2.5?10 5 (100 ?L) mixed H22 tumor cells into mice. The lymphocyte infiltration in the site of tumor and the expression of Fas on tumor cells were detected by immunohistochemistry. RESULTS: The tumorigenecity of H22 cells transfected with TNF-? gene and its mutants was significantly weakened ( P

Objective To reconstruct the initiative procedure of HIV-1 reverse transcription in vitro and establish a methodology of assessing activity of HIV-1 reverse transcriptase (RT) with real-time PCR Methods The tRNALys-3 gene was amplified from genome in healthy individuals through polymerase chain reaction (PCR), and then T7 transcription promoter was added in 5'-terminal of the tRNALys-3. The tRNA[Lys-3 cRNA product was obtained by applying T7 RNA polymerase through a transcription reaction. The 5'-LTR-PBS DNA was also obtained by transcription reaction from the HIV-1 infectious clone and inserted into pGEM-T easy vectors. 5'-LTR-PBS cRNA was obtained by applying SP6 RNA polymerase whose combining site was located in pGEM-T easy vectors. Then the two RNA samples was catalyzed by two kinds of standard reverse transcriptases (SuperScript Ⅲ and HIV-1 standard reverse transcriptase, respectively) and the cDNA was synthesised. The relative activity of RT was determined with the real-time PCR. Results The tRNALys-3 primer and the SP6-5'-LTR-PBS RNA were procured accurately, whose length were 93bp and 872 bp, respectively. After the following serial dilution of Super Script Ⅲ and HIV-1 standard reverse transeriptase:1 : 10, 1: 100, 1:1 000, 1:10 000, each step of reverse transcription process worked successfully. Real-time PCR results showed that Ct values of the two groups were 13.9, 18. 3, 20. 9, 24. 9 and 20. 4, 25. 5, 28. 7, 32. 5 respectively. Conclusion A novel real-time PCR method is developed to assay the RT activity directly through reconstructing the initiation of HIV reproduction, which may be helpful for clinical management, screening of new antiretroviral drugs, and drug resistance test.

Expression of HLA class Ⅱ antigens(HLA-DR, DQ and DP), interleukin2 receptors(IL-2R) and transferrin receptors(TfR) of blood monocytes from 10 patients with insulin-dependent diabetes meIlitus (IDDM) were assayed with the indirect immune fluorescence technique using corresponding monoclonal antibodies and the FITC-labelled second antibody. The results showed that the number of HLA-DQ~+ monocytes was much more in diabetics than in normal controls. The percentages of HLA-DR~+ and HLA-DP~+ monocytes in diabetics were not different significantly from those in normal controls. Besides, IL-2R~+ and TfR~+ monocytes were also found to be very much increased in diabetics as compared with controls. It was possible that increased expression of HLA-DQ antigen, IL-2R and TfR of monocytes in patients with IDDM might play a role in the pathogenesis of the autoimmune reaction.

reproducible, and may cover the major circulating strains in China.

To compare the anti-tumor effects of transmembrane TNF-alpha (TM-TNF) and secreted TNF-alpha (S-TNF) in vivo, mouse fibroblasts NIH3T3 were transfected separately with three types of retrovirus containing wild type TNF-alpha (Wt-TNF), TM-TNF mutant (TM-TNFm), S-TNF mutant (S-TNFm). Southern blot, RT-PCR, FACS and bioassay were used to investigate TNF-alpha gene integration, expression and its biological activity. It was found that both fixed cells and supernatant of NIH3T3/Wt-TNF, the fixed cells of NIH3T3/TM-TNFm and the supernatant of NIH3T3/S-TNFm could express high level of TNF-alpha or its mutants and effectively kill H22 in vitro. The transfected NIH3T3 were separately injected into the mice at the sites of H22 tumor cell inoculation according to a ratio of 5:1 or 1:1 (effector/target cells, E/T) after the third day of H22 challenge, respectively. At the E/T = 5:1, the NIH3T3/TM-TNFm induced the highest tumor regression, while NIH3T3/S-TNFm exerted the strongest tumor depressing effect at the E/T = 1:1 in vivo. No obvious side effects were noted throughout the course of treatment. The results suggest that both TM-TNF and S-TNF could cause tumor regression. The anti-tumor effect of TM-TNF would be more powerful and safe than that of S-TNF at the proper E/T ratio.
3T3 Cells ; Adenoviruses, Human ; genetics ; Animals ; Cytotoxicity, Immunologic ; immunology ; Fibroblasts ; cytology ; immunology ; Liver Neoplasms, Experimental ; immunology ; pathology ; Membrane Proteins ; secretion ; Mice ; Mutation ; Transfection ; Tumor Cells, Cultured ; Tumor Necrosis Factor-alpha ; genetics ; immunology ; secretion

Objective To establish a mini-pool nucleic acid testing (NAT) assay using multiplex RT-nested PCR for the detection of HIV RNA, and apply it in screening for acute HIV infection among MSM. Methods Frozen EDTA plasma samples collected between Oct. 2008 and Mar. 2009 from 3 HIV infectors during window-period, a total of 30 HIV chronically infected individuals and 97 healthy subjects were used to develop the NAT assay. Plasma samples from 10 cases were pooled into one tube and centrifuged at high speed for the collection of viruses. HIV RNA was extracted. Two pairs of primers were designed according to two conserved regions of HIV RNA ( HXB2 nt 5783-nt 6228 and nt 1235-nt 2012).Multiplex RT-PCR and nested PCR were performed. Individual NAT-reactive samples were confirmed by commercially available NAT assays. The sensitivity and performance efficacy were also evaluated. The assay was then applied to 1 005 plasma specimens from MSM with negative or uncertain HIV antibody test results.These were collected in the same period as the other samples. Results ( 1 ) Two fragments of HIV were amplified successfully with the low detection limit of 162 copies/ml plasma; (2) Results of the mini-pool HIV NAT validation with samples from 3 HIV infectors during window-period were consistent with the expected values; (3) All 30 plasma samples from MSM with positive HIV antibody, which were tested by multiplex RT nested PCR, were found to be HIV RNA positive; (4) One out of 1 005 plasma samples was found to be HIV RNA positive, for this case acute infection was followed-up and sero-conversion was found. Conclusion Mini-pool NAT has good sensitivity, and may be applied to screening HIV RNA among MSM during window-period.