Clinical observation of the changes of serum helper T-lymphocytes (TH) cytokines in patients with HIV-infection and opportunistic infection / 中华预防医学杂志

<p><b>OBJECTIVE</b>To observe the changes of serum helper T-Lymphocyte (Th) cytokines at each stage in patients with human immunodeficiency virus (HIV) infection and with opportunistic infection.</p><p><b>METHODS</b>Seventeen normal subjects were studied as controls. Among the 85 patients with HIV-infection studied, 31 had opportunistic infection. The study was divided into stage A, B, and C according to the standards set forth by The US Centers for Disease Control and Prevention (CDC). 17, 29, and 39 subjects were respectively at stage A, B, and C. The levels of the CD4+ T cells and the CD8+ T cells were measured by flow cytometry (FCM), while the levels of interleukin-2 (IL-2), interferon-gamma (IFN-gamma), interleukin-6 (IL-6), and interleukin-10 (IL-10) were measured using enzyme-linked immunosorbent assay (ELISA). All data were analyzed with statistic software SPSS11.0.</p><p><b>RESULTS</b>The level of the CD4+ T cells was (361.85 +/- 230.61) 10(6)/L in the experimental group, lower than that of the control group (772.41 +/- 161.56) 10(6)/L (t = 6.992, P < 0. 01). The level of IL-2 was (61.82 +/- 63.59) pg/ml, lower than that of the control group (111.25 +/- 66.14) pg/ml (t = 2.907, P < 0.01). In the experimental group, the level of the CD8+ T cells was 713.36 +/- 317.59 10(6)/L, higher than that of the control group (583.24 +/- 96.28) 10(6)/L (t = 3.127, P < 0.01), the level of IL-10 was (1362.70 +/- 869.49) pg/ml, higher than that of the control group (818.54 +/- 276.22) pg/ml (t = 4.704, P < 0.01), and the level of IL-6 was (1883.14 +/- 1058.61) pg/m, higher than that of the control group [(1208.52 +/-745.36) pg/ml] (t = 2.502, P < 0.05). Along with the progression of the disease, the level of IL-2 in the experimental group was decreasing gradually, reaching (51.72 +/- 62.28) pg/ml at stage C and (69.02 +/- 62.77) pg/ml at stage B, both of which were lower than those of the control group. The levels of IL-6 and IL-10 rose gradually and were (2040.27 +/- 1078.95) pg/ml and (1472.10 +/-982.03 ) pg/ml respectively at stage C, higher than those of the control group. At stage B, the level of IL-10 was (1347.35 +/- 780.95) pg/ml, higher than that of the control group (818.54 +/- 276.22) pg/ml. The level of IL-6 was (2236.24 +/- 1052.42) pg/ml in patients with opportunistic infection, higher than that in those without opportunistic infection (1680.43 +/- 1017.05) pg/ml (t = 2. 395, P < 0. 05).</p><p><b>CONCLUSION</b>Dynamical measure of the levels of the serum IL-2, IL-6 and IL-10 in patients with HIV infection is a must. Therefore, the progression of AIDS can be controlled by increasing the level of IL-2, decreasing the levels of IL-6 and IL-10, and adjusting the balance of TH1/TH2 cells.</p>

Effect of HIV-1 infection on apoptosis of CD4+ T lymphocytes mediated by Fas / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To study the pathogenic role of Fas/CD95 in HIV-1 infection subjects, and to investigate the effects of HIV on plasma levels of sFas and the expression of CD95 on different CD4(+) T lymphocyte subpopulations.</p><p><b>METHODS</b>Four-color flow cytometry was used to determine the expression of CD95, CD45RO, CD45RA on CD4(+ )T lymphocyte in peripheral blood from HIV-1 infection subjects and serum Fas levels were quantified by enzyme-linked immunosorbent assay (ELISA).</p><p><b>RESULT</b>Compared with healthy controls, serum Fas levels were significantly increased (P<0.05) in HIV group and positively correlated with the disease progress. The expression of CD95 on naive T-lymphocyte subsets was increased whereas that on memory T-lymphocyte subsets was decreased.</p><p><b>CONCLUSION</b>Fas plays an important role in the deletion of CD4(+) T-lymphocyte during HIV-1 infection. Further understanding of the relationship between Fas/CD95 and CD45RO/CD45RA may help to predict the progression of the disease and the clinical outcome.</p>

Evaluation of serum interleukin-18 and interleukin-10 in patients with HIV-1 and hepatitis viruses co-infected subjects / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To study the significance of cytokines in patients with HIV and hepatitis viruses co-infection.</p><p><b>METHODS</b>Serum levels of IL-18 and IL-10 were measured by enzyme-linked immunosorbent assay (ELISA). HIV-RNA levels were measured in EDTA plasma by quantitative reverse polymerase chain reaction (PCR). CD4(+) lymphocyte counts were determined by four-color Flow cytometry (FCM).</p><p><b>RESULTS</b>The levels of IL-18 were significantly higher in HIV-infected persons compared with those in controls (P<0.05). With HIV disease progression, IL-18 levels increased while Il-10 levels decreased. HCV patients showed lower levels of IL-18 and IL-10 than those of the co-infection group.</p><p><b>CONCLUSION</b>Univariate analyses shows significant co-variables IL-10 in co-infection. Up-regulating IL-18 activity and/or down-regulating IL-10 may be a potential therapy to patients with HIV and hepatitis viruses co-infection.</p>

Expression of co-receptor on different T lymphocytes subpopulations after effective HAART / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To measure CCR5 and CXCR4 chemokine receptor expression on CD4 and CD8 T cells in HIV-1 infection and to relate levels to the distribution of CD45RO memory and CD45RA-naive subsets after effective HAART.</p><p><b>METHODS</b>Four-color cytofluorometry with appropriate conjugated monoclonal antibodies (mAbs) was performed to define CD45RA and CD45RO subsets of CD4 and CD8 T cells and measure the expression of CCR5, CXCR4 in blood from 43 received HAART patients and 5 non-treated HIV and 13 healthy controls.</p><p><b>RESULTS</b>The levels of CCR5 and CXCR4 on CD4 and CD8 T cells and their CD45RO/CD45RA subsets in HIV-1-infected patients had not any statistical significance than that on control subjects and effective HAART could adjust the expression on T cells.</p><p><b>CONCLUSION</b>CXCR4/CCR5 plays an important role in the progress of HIV-1 infection. The most favorable condition for treatment should be initiated before stage B.</p>

Immune activation in AIDS related Kaposi's sarcoma / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To study the pathogenesis role of immune system activation in AIDS related Kaposi's sarcoma(AIDS-KS).</p><p><b>METHODS</b>The serum levels of sFas, beta 2-microglobin, IL-10, IL-16, IL-18, IL-6 and sIL-4R were detected by ELISA in 8 AIDS-KS patients, 28 patients with HIV infection but without Kaposi's sarcoma(HIV-NKS) and 16 normal controls. The lymphocyte and their subsets, CD38(+) CD8, HLA-DR(+)CD8 in the peripheral blood mononuclear cell (PBMCs) in 12 AIDS-KS and 32 HIV-NKS were detected by flow cytometer.</p><p><b>RESULTS</b>Beta 2-MG and sIL-4R in HIV-NKS were significantly higher than those in normal controls(P<0.05), IL-16 in HIV-NKS was significantly lower than that in controls(P<0.05). IL-18 was higher in both AIDS-KS and HIV-NKS compared with normal controls. In AIDS-KS, CD3, CD4, CD8, NK and HLA-DR(+)CD8 were lower than those in HIV-NKS whereas CD19 and CD38(+)CD8 were higher than those in HIV-NKS. But the difference was not statistically(P<0.05).</p><p><b>CONCLUSION</b>Although both AIDS-KS and HIV-NKS demonstrate some activation of immune system, there appears to be no significant difference between immune responses in KS and NKS patients. These data suggest that the activation of the immune system is unlikely to contribute significantly to the pathogenesis of AIDS-KS.</p>

Drug resistance of HIV-infected patients after the failure of highly active antiretroviral treatment / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To find out the mechanism of drug resistance by detecting the mutations of HIV RNA in patients who failed in the anti-HIV therapy, to direct the clinical use of anti-HIV drugs and to complement the existing drug resistant database.</p><p><b>METHODS</b>HIV RNA and DNA were extracted from the plasma of 10 HIV-infected patients who developed drug resistance in the Clinic of AIDS, Ruhr University, Bochum, Germany. Then HIV-RNA was amplified in the reverse transcriptase (RT) and protease regions by polymerase chain reaction (PCR). After purified, the PCR products was sequenced. The acquired sequences were compared with the international standard strain HXB2CG and the resistant database of Stanford University.</p><p><b>RESULTS</b>Some mutations were found to cause the corresponding resistance to certain drugs and were consistent with the clinical results. Some mutations existed in some patients, such as V179I in RT and K20T, K20I in protease, which hadn't been reported in the resistant database of Stanford University yet.</p><p><b>CONCLUSION</b>Patients who fail in HAART have different mutations in RT and protease regions. Mutations such as V179I in RT and K20T, K20I etc in protease may be related to drug resistance.</p>

Influence of HGV super-infected with HIV or HCV on the virus replication / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To realize human immunodeficiency virus(HIV) and hepatitis C virus(HCV) super-infected with hepatitis G virus(HGV or GBV/C) and to probe into the mechanism of these virus infection in the body.</p><p><b>METHODS</b>HIV and HCV load were tested by the quantitated RT-PCR in the HIV or HCV infected plasma samples respectively and the HGV RNA was detected in all of the samples. Then some of the HGV positive were sequenced.</p><p><b>RESULTS</b>123 of 317 HIV patients were positive for HGV, the positive rate was 38.8%. Among the 91 HCV patients, 19 were positive for HGV. The positive rate is 20.9% which was less than that of HIV patients. HIV load of the patients super-infected with HGV was less than that of those without HGV[(1.8+/-0.6)x10 copies/ml compared with (1.9+/-1.1)x10(2)copies/ml]; while HGV and HCV super-infection did not influence the HCV RNA load significantly [(1.5+/-0.6)x10(4) copies/ml compared with (5.4+/-1.8)x10(4)copies/ml]. The HGV sequences from HIV or HCV patients were compared and showed no difference markedly.</p><p><b>CONCLUSION</b>The rate of the HIV and HGV super-infection is higher than that of HCV. HGV may inhibit HIV reproduction in the body while superinfection.</p>

Sequence detection of HBV-DNA P and C region in HIV/HBV superinfection subjects with drug resistance to HAART / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To further study the resistance of HBV to high activity antiretrovirus therapy(HAART).</p><p><b>METHODS</b>HBV-DNA was quantitatively detected by real-time PCR in 36 HIV/HBV superinfection subjects, C region and P region HBV-DNA in high copies HBV-DNA subjects were detected by routine PCR, PCR products were purified and sequenced and compared with the HBV international Genbank using BLSAT softy ware.</p><p><b>RESULT</b>HBV-DNA was positive in 4 of 36 patients (11.1%) and another 3 had low copies(<10(4)copies/ml), one had a high HBV-DNA copies (10(7)copies/ml). It's HBV-DNA C region sequence had mutation on 2 sites (nt 2412 T/C; nt 2413 T/C) and 1 mutation P region (nt 741 A/G, also YMDD/YVDD) compared with HBV international Genbak reference sequence.</p><p><b>CONCLUSION</b>The HBV resistance to HAART may be related with multiple genetic mutations in the C and P regain of HBV-DNA.</p>