Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 171
Filtrar
1.
Zhonghua Bing Li Xue Za Zhi ; 40(9): 622-5, 2011 Sep.
Artigo em Chinês | MEDLINE | ID: mdl-22177247

RESUMO

OBJECTIVE: To explore the clinicopathological correlation between CD4(+) T lymphocyte count and superficial lymphadenopathy HIV/AIDS patients. METHODS: A total of 1066 HIV/AIDS patients were included in this study. The incidence of superficial lymphadenopathy, peripheral blood CD4(+) T lymphocyte counts and histological features of superficial lymphadenopathy were analyzed. RESULTS: Among 1066 patients, 126 cases (11.8%) presented with superficial lymphadenopathy. Of the 126 cases, there were 69 cases with CD4(+) T lymphocyte counts < 100/µl and clinical diagnoses including tuberculosis (37 cases), reactive hyperplasia (8 cases), AIDS-related lymphadenopathy (18 cases), penicillium diseases (12 cases), fungal infection (5 cases) and non-tuberculous mycobacterial infection (1 case). Twenty-six cases had CD4(+) T lymphocyte counts between 100/µl to 200/µl and clinical diagnosis including tuberculosis (12 cases), reactive hyperplasia (8 cases), AIDS-related lymphadenopathy(6 cases), penicillium disease (2 cases) and non-Hodgkin lymphoma (1 case). Twenty-nine cases had CD4(+) T lymphocyte counts > 200/µl and clinical diagnoses including tuberculosis (11 cases), reactive hyperplasia (12 cases), AIDS-related lymphadenopathy (3 cases), Penicillium diseases (1 case) and non-Hodgkin lymphoma (4 cases). The CD4(+) T lymphocyte counts among patients with tuberculosis, AIDS-related lymphadenopathy and Penicillium diseases were significantly different (χ(2) = 8.861, P = 0.012). A significant correlation between the incidence of superficial lymphadenopathy and CD4(+) T lymphocyte counts was found (χ(2) = 375.41, P = 0.000). CONCLUSIONS: The most common cause of superficial lymphadenopathy in HIV/AIDS patients is tuberculosis, followed by lymph node reactive hyperplasia, AIDS-related lymphadenopathy and Penicillium disease. Low CD4(+) T lymphocyte count correlates with an increased incidence of superficial lymphadenopathy and the risk of opportunity infection. Therefore, determination of peripheral blood CD4(+) T lymphocyte count should become an integral marker for the early diagnosis and treatment of superficial lymphadenopathy in HIV/AIDS patients.


Assuntos
Complexo Relacionado com a AIDS/sangue , Síndrome da Imunodeficiência Adquirida/sangue , Contagem de Linfócito CD4 , Infecções por HIV/sangue , Complexo Relacionado com a AIDS/complicações , Complexo Relacionado com a AIDS/patologia , Infecções Oportunistas Relacionadas com a AIDS/sangue , Infecções Oportunistas Relacionadas com a AIDS/complicações , Infecções Oportunistas Relacionadas com a AIDS/patologia , Síndrome da Imunodeficiência Adquirida/complicações , Síndrome da Imunodeficiência Adquirida/patologia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Criança , Feminino , Infecções por HIV/complicações , Infecções por HIV/patologia , Humanos , Linfonodos/patologia , Masculino , Pessoa de Meia-Idade , Tuberculose/sangue , Tuberculose/complicações , Tuberculose/patologia , Adulto Jovem
2.
Clin Chem ; 55(10): 1824-33, 2009 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-19696118

RESUMO

BACKGROUND: Most methods for estimation of rates of RNA production are not applicable in human in vivo clinical studies. We describe here an approach for measuring ribosomal RNA turnover in vivo using [6,6-(2)H(2)]-glucose as a precursor for de novo RNA synthesis. Because this method involves neither radioactivity nor toxic metabolites, it is suitable for human studies. METHODS: For method development in vitro, a lymphocyte cell line (PM1) was cultured in the presence of [6,6-(2)H(2)]-glucose. RNA was extracted, hydrolyzed enzymatically to ribonucleosides, and derivatized to either the aldonitrile tetra-acetate or the pentafluoro triacetate derivative of the pentose before GC-MS. We identified optimum derivatization and analysis conditions and demonstrated quantitative incorporation of deuterium from glucose into RNA of dividing cells. RESULTS: Pilot clinical studies demonstrated the applicability of this approach to blood leukocytes and solid tissues. A patient with chronic lymphocytic leukemia received [6,6-(2)H(2)]-glucose (1 g/kg) orally in aliquots administered every 30 min for a period of 10 h. When we analyzed CD3(-) B cells that had been purified by gradient centrifugation and magnetic-bead adhesion, we observed deuterium enrichment, a finding consistent with a ribosomal RNA production rate of about 7%/day, despite the slow division rates observed in concurrent DNA-labeling analysis. Similarly, in 2 patients with malignant infiltration of lymph nodes, administration of [6,6-(2)H(2)]-glucose (by intravenous infusion for 24 h) before excision biopsy allowed estimation of DNA and RNA turnover in lymph node samples. CONCLUSIONS: Our study results demonstrate the proof-of-principle that deuterium-labeled glucose may be used to analyze RNA turnover, in addition to DNA production/cell proliferation, in clinical samples.


Assuntos
Glucose , Linfonodos/metabolismo , Linfócitos/metabolismo , RNA Ribossômico/metabolismo , Complexo Relacionado com a AIDS/sangue , Complexo Relacionado com a AIDS/patologia , Adenosina/metabolismo , Linhagem Celular Tumoral , Proliferação de Células , Deutério , Cromatografia Gasosa-Espectrometria de Massas , Glucose/farmacocinética , Humanos , Leucemia Linfocítica Crônica de Células B/sangue , Linfonodos/patologia , Linfoma não Hodgkin/sangue , Linfoma não Hodgkin/patologia , Masculino , Pessoa de Meia-Idade , Modelos Biológicos , Ribonucleosídeos/metabolismo , Sarcoma de Kaposi/sangue , Sarcoma de Kaposi/patologia
3.
Biotherapy ; 11(1): 7-14, 1998.
Artigo em Inglês | MEDLINE | ID: mdl-9617460

RESUMO

We have been treating patients with advanced HIV disease using passive immunotherapy (PIT). Earlier studies of PIT which have been published concerned relatively short periods of treatment: our study is by far the longest and reports also on the long-term effects of plasmapheresis on healthy HIV-infected individuals. Fifty-nine patients with an average CD4+ T-cell count of 55 per cu.mm. at baseline were transfused at monthly intervals with 500 ml of hyperimmune plasma. No disease progression or death occurred among the 8 asymptomatic patients under the treatment, which lasted for 36.25 months on average. Seven of the 15 ARC patients progressed to AIDS but none died in an average period of 25.9 months. Seven of the 36 symptomatic AIDS patients with advanced disease died in an average period of 19.6 months. PIT appears to be nontoxic and to have beneficial effects lasting at least four years under continuous treatment. It probably delays disease progression in ARC and AIDS patients, and almost certainly does so in asymptomatic late HIV infection with a very low CD4+ T-cell count. None of the 51 donors suffered adverse effects, nor did any progress to ARC or AIDS in an average period of 30.1 months. Their laboratory parameters indicated a nearly stable condition: in particular, their average CD4+ T-cell count rose from 478 to 498. The study of our plasma donors indicated that repeated and frequent plasma donation by asymptomatic HIV-infected individuals could delay disease progression, although further studies are needed to investigate this.


Assuntos
Infecções por HIV/terapia , Soropositividade para HIV/terapia , HIV-1 , Imunização Passiva , Plasmaferese , Complexo Relacionado com a AIDS/sangue , Complexo Relacionado com a AIDS/terapia , Síndrome da Imunodeficiência Adquirida/sangue , Síndrome da Imunodeficiência Adquirida/prevenção & controle , Adolescente , Adulto , Doadores de Sangue , Progressão da Doença , Feminino , Infecções por HIV/sangue , Soropositividade para HIV/sangue , Humanos , Masculino , Pessoa de Meia-Idade
4.
Clin Immunol Immunopathol ; 84(3): 338-41, 1997 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-9281393

RESUMO

The human immunodeficiency virus type 1 was recently found to use several chemokine receptors in addition to the CD4 molecule for attachment to, and fusion with, CD4+ cells. The interaction between macrophage-tropic HIV-1 strains and one of these chemokine receptors, CCR5, was shown to involve the V3-loop of the viral envelope glycoprotein gp120. Physiological ligands of CCR5, namely the beta-chemokines MIP-1alpha, MIP-1beta, and RANTES, were found to competitively inhibit the V3-loop-CCR5 interaction. We therefore hypothesized that the V3-loop of gp120 of macrophage-tropic HIV-1 may share a binding site on CCR5 with MIP-1alpha, MIP-1beta, and RANTES and that the V3-loop therefore might have some homology with these beta-chemokines. In the present study, we could demonstrate that affinity purified anti-V3-loop antibodies isolated from serum of an HIV-1-infected patient bound to MIP-1alpha and RANTES. Furthermore, sera of HIV-infected hemophilia patients without AIDS or ARC had significantly higher anti-MIP-1alpha and anti-RANTES antibody activities than sera of HIV-infected hemophilia patients with AIDS. We speculate that the higher activities of anti-MIP-1alpha and anti-RANTES antibodies in asymptomatic HIV-1 infected individuals might be due to a cross-reaction of beta-chemokines with anti-V3-loop antibodies raised against gp120 of macrophage-tropic HIV-1 strains, known to be prevailing in the asymptomatic stage of HIV infection. Such anti-chemokine antibodies may play a deleterious role in the pathogenesis of AIDS by reducing the chemokines' potential to inhibit HIV-1 entry into CD4+ cells.


Assuntos
Quimiocina CCL5/imunologia , HIV-1 , Proteínas Inflamatórias de Macrófagos/imunologia , Complexo Relacionado com a AIDS/sangue , Síndrome da Imunodeficiência Adquirida/sangue , Anticorpos Anti-Idiotípicos/sangue , Linfócitos B/imunologia , Quimiocina CCL3 , Quimiocina CCL4 , Reações Cruzadas , Infecções por HIV/sangue , Hemofilia A/sangue , Humanos , Imunoglobulina G/sangue , Ativação Linfocitária
5.
J Med Virol ; 48(4): 344-53, 1996 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-8699167

RESUMO

Preliminary evidence suggested that human herpesvirus-6 (HHV-6) may act as a cofactor in acquired immunodeficiency syndrome (AIDS) and may contribute to the pathogenesis of lymphoproliferative disorders occurring in individuals infected with the human immunodeficiency virus (HIV). To understand better the biological and clinical significance of HHV-6 infection in the context of HIV-related immunosuppression, the polymerase chain reaction was used to study the frequency and variant distribution of HHV-6 in peripheral blood mononucleated cells (PBMCs) from HIV-seropositive individuals, either asymptomatic or with lymphadenopathy syndrome (LAS) or with overt AIDS. Non-neoplastic and malignant lymphoproliferative disorders from both HIV-infected and HIV-seronegative patients were also investigated using the same series of samples for the presence of Epstein-Barr virus (EBV). When compared with healthy blood donors (12/42, 29%), HHV-6 prevalence in PBMCs showed a progressive decline in HIV-seropositive individuals with asymptomatic HIV infection (3/26, 11%) and in patients with LAS (1/13, 8%) and a significant reduction in patients with overt AIDS (1/20, 20%; P = 0.02). The decrease correlated with the number of CD4+ cells at the time of examination. In addition, HHV-6 DNA sequences were significantly more prevalent in LAS biopsies (13/20, 65%) than in HIV-unrelated reactive lymphadenopathies (2/10, 20%; P = 0.02) and the presence of HHV-6 sequences correlated closely with a histologic pattern of follicular hyperplasia (13/16, 81%; P = 0.003). Strikingly, HHV-6 prevalence decreased in PBMCs of LAS patients, suggesting that the likelihood of interactions between HHV-6 and HIV varies in different body districts. In particular, the demonstration that all HHV-6-carrying LAS samples were also positive for HIV infection suggests that LAS lymph nodes constitute one of the sites where biologically relevant interactions between the two viruses might occur. Also, the prevalence of EBV was higher in LAS (14/20, 70%) than in non-neoplastic lymph nodes from HIV-seronegative individuals (4/10, 40%), although the difference was not statistically significant. EBV was associated strongly with HIV-related malignant lymphoproliferative disorders, being detected in 100% of patients with Hodgkin's disease (HD) and 53% of B-cell non-Hodgkin's lymphomas (NHL). In contrast, the prevalence of HHV-6 DNA in HD and B-cell NHL arisen in HIV-infected patients (30% and 6% respectively) was remarkably lower and similar to that observed in lymphoproliferative disorders from HIV-seronegative patients. Finally, as observed in healthy individuals, HHV-6 variant B was more prevalent than variant A in benign and malignant lymphoproliferative disorders from bot HIV-infected and HIV-seronegative patients. These results suggest that the interactions between HHV-6 and HIV could be different in the various phases of HIV disease and in different districts; HHV-6 has probably no direct role in the pathogenesis of HIV-associated B-cell NHL and HD cases, and behave differently from EBV; and HIV-related immunosuppression does not alter the distribution of HHV-6 variants in these tissues, as observed in the case of EBV.


Assuntos
Complexo Relacionado com a AIDS/virologia , Infecções Oportunistas Relacionadas com a AIDS/virologia , Infecções por Herpesviridae/virologia , Herpesvirus Humano 6/isolamento & purificação , Transtornos Linfoproliferativos/virologia , Complexo Relacionado com a AIDS/sangue , Complexo Relacionado com a AIDS/patologia , Infecções Oportunistas Relacionadas com a AIDS/sangue , Infecções Oportunistas Relacionadas com a AIDS/complicações , DNA Viral/sangue , Infecções por HIV/sangue , Infecções por HIV/complicações , Infecções por HIV/virologia , Infecções por Herpesviridae/sangue , Infecções por Herpesviridae/complicações , Herpesvirus Humano 4/genética , Herpesvirus Humano 4/isolamento & purificação , Herpesvirus Humano 6/genética , Humanos , Transtornos Linfoproliferativos/sangue , Transtornos Linfoproliferativos/patologia , Reação em Cadeia da Polimerase
6.
Artigo em Inglês | MEDLINE | ID: mdl-8548332

RESUMO

In untreated, asymptomatic human immunodeficiency virus type 1 (HIV-1) infection, elevated serum concentrations of soluble receptors for tumor necrosis factor (sTNFR) types I and II are associated with progression to AIDS. To assess the utility of sTNFRs as markers for the assessment of antiretroviral treatment, sTNFRs were sequentially determined in 47 asymptomatic HIV-1-infected men, who participated in a double-blind, randomized, placebo-controlled study. Progression to AIDS or severe AIDS-related complex occurred in six zidovudine (ZDV)- and six placebo-treated subjects. During ZDV treatment (n = 28) both types of sTNFRs declined compared with baseline and placebo, whereas they increased during placebo treatment (n = 19). A sustained decline of sTNFRs occurred only in subjects who experienced no disease progression. During the first 3 months of ZDV treatment, the hazard ratio for disease progression when sTNFR type II rose above the baseline value plus 5% was significantly increased (hazard ratio: approximately 25; 95% confidence interval: approximately 1.5-400; p < 0.03). Simultaneously determined CD4+ counts and serum neopterin levels showed a similar pattern in progressors and nonprogressors. Thus, in contrast to CD4+ counts and neopterin levels, sTNFR concentrations, especially those of the type II STNFR, appear to be valuable surrogate markers for monitoring the efficacy of ZDV treatment in asymptomatic HIV-1 infection.


Assuntos
Antivirais/uso terapêutico , Infecções por HIV/tratamento farmacológico , HIV-1 , Receptores do Fator de Necrose Tumoral/análise , Zidovudina/uso terapêutico , Complexo Relacionado com a AIDS/sangue , Complexo Relacionado com a AIDS/tratamento farmacológico , Complexo Relacionado com a AIDS/fisiopatologia , Síndrome da Imunodeficiência Adquirida/sangue , Síndrome da Imunodeficiência Adquirida/tratamento farmacológico , Síndrome da Imunodeficiência Adquirida/fisiopatologia , Adulto , Biomarcadores/análise , Biopterinas/análogos & derivados , Biopterinas/sangue , Contagem de Linfócito CD4 , Progressão da Doença , Método Duplo-Cego , Seguimentos , Proteína do Núcleo p24 do HIV/análise , Infecções por HIV/sangue , Infecções por HIV/fisiopatologia , Humanos , Masculino , Neopterina , Receptores do Fator de Necrose Tumoral/química , Solubilidade
7.
AIDS ; 9(12): 1323-9, 1995 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-8605051

RESUMO

OBJECTIVE: To evaluate the efficacy of 3TC (lamivudine), a synthetic nucleoside analogue that inhibits HIV reverse transcriptase in vitro, as treatment for HIV-positive, asymptomatic or mild AIDS-related complex patients. DESIGN: Open-label, multinational and multicentre, non-comparative, escalating dose study. METHODS: Patients who meet the selection criteria (n = 104) were enrolled in three European countries. Ten to 15 patients were included at each of the six dose levels of 3TC (0.5, 1.0, 2.0, 4.0, 8.0, 12.0 and 20.0 mg/kg daily in two divided doses every 12 h). Virological parameters--immune-complex dissociation (ICD) assay for HIV p24 antigenaemia, plasma HIV RNA load, whole blood assay and cellular viraemia--were evaluated at weeks 0, 4, 12 and 24. RESULTS: Sustained reductions in HIV RNA load and in ICD p24 antigen levels were observed and maintained over the 12-week assessment period. Greater reductions were noted at higher doses but this trend did not reach statistical significance. In 38 patients, reductions of cell viraemia were significantly greater at 4 weeks for patients treated at higher doses of 3TC. CONCLUSION: These virological data show that 3TC is a potent inhibitor of HIV replication in HIV-positive, asymptomatic or mild ARC patients as assessed by ICD p24 antigenaemia, plasma HIV RNA load and cell viraemia.


Assuntos
Antivirais/uso terapêutico , Infecções por HIV/tratamento farmacológico , Inibidores da Transcriptase Reversa/uso terapêutico , Zalcitabina/análogos & derivados , Complexo Relacionado com a AIDS/sangue , Complexo Relacionado com a AIDS/tratamento farmacológico , Adulto , Complexo Antígeno-Anticorpo/sangue , Relação Dose-Resposta a Droga , HIV/efeitos dos fármacos , Proteína do Núcleo p24 do HIV/imunologia , Infecções por HIV/sangue , Soropositividade para HIV/sangue , Soropositividade para HIV/tratamento farmacológico , Humanos , Lamivudina , Leucócitos Mononucleares/virologia , Masculino , Reação em Cadeia da Polimerase , Viremia , Zalcitabina/uso terapêutico
8.
J Med Microbiol ; 42(6): 411-4, 1995 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-7791205

RESUMO

Lymphocytes and monocytes from 25 patients infected with human immunodeficiency virus type-1 (HIV-1)--13 asymptomatic, seven with the AIDS-related complex (ARC) and five with the acquired immunodeficiency syndrome (AIDS)--were lysed and subjected to PCR with three primer pairs: SK38/SK39 (gag), SK68/SK69 (env) and SK29/SK30 (LTR). Amplified DNA was solution-hybridised with 32P-labelled probes (SK19, SK70 and SK31, respectively) and detected by PAGE-autoradiography. HIV-1 DNA was detected as follows. Asymptomatic patients: monocytes--gag 61.5%, env 100%, LTR 0%; lymphocytes--gag 100%, env 92.3%, LTR 53.84%. ARC patients: monocytes--gag 71.4%, env 57.1%, LTR 0%; lymphocytes--gag 100%, env 71.4%, LTR 71.4%. AIDS patients: monocytes--gag 80.0%, env 100%, LTR 0%; lymphocytes--gag 100%, env 60%, LTR 60%. The presence of HIV-1 DNA was confirmed in the monocyte fraction. In this cell subset, the env gene-directed primers were the most effective for amplification, whereas the LTR gene-directed primers failed to amplify HIV-1 DNA. The different pattern of amplification found in monocytes may suggest that these cells could be infected by a genetic variant of the virus.


Assuntos
DNA Viral/sangue , Infecções por HIV/sangue , HIV-1/isolamento & purificação , Monócitos/virologia , Complexo Relacionado com a AIDS/sangue , Complexo Relacionado com a AIDS/virologia , Síndrome da Imunodeficiência Adquirida/sangue , Síndrome da Imunodeficiência Adquirida/virologia , Portador Sadio/sangue , Portador Sadio/virologia , Genes Virais , Genes env , Genes gag , Infecções por HIV/virologia , HIV-1/genética , Humanos , Linfócitos/virologia , Reação em Cadeia da Polimerase , Sequências Repetitivas de Ácido Nucleico/genética
10.
Cell Mol Biol (Noisy-le-grand) ; 41(3): 417-21, 1995 May.
Artigo em Inglês | MEDLINE | ID: mdl-7580836

RESUMO

Levels of plasma lactoferrin are decreased in HIV-1-infected patients in relation to the progression of the disease. Plasma lactoferrin concentrations were determined using a specific and sensitive enzyme immunoassay. 97 plasma were studied (22 asymptomatic, 45 symptomatic patients compared to 30 healthy controls) and the results showed a highly significant decrease (p < 0.001) of the level of lactoferrin in HIV-1-infected patients (respectively 2.79 +/- 1.2 and 0.68 +/- 0.22 micrograms/ml) compared to controls (4.37 +/- 0.83 micrograms/ml). Since it is well established that plasma lactoferrin level could be influenced by the number of neutrophils, the experiments were reproduced in neutropenic patients who represent 10% of recruitment (6 among 45 symptomatic patients). The plasma from neutropenic symptomatic patients (neutrophils < or = 1,300/mm3) showed their mean lactoferrin level at 0.36 micrograms/ml still far above the normal values. In view of the different reported biological effects of lactoferrin that are of great importance in the non-specific defences, the real biological place of the lack of such a molecule could be one important component of the multifactorial nature of HIV-1 infection.


Assuntos
Complexo Relacionado com a AIDS/sangue , Síndrome da Imunodeficiência Adquirida/sangue , Lactoferrina/sangue , Contagem de Linfócito CD4 , Progressão da Doença , Ensaio de Imunoadsorção Enzimática , Feminino , Soropositividade para HIV/diagnóstico , HIV-1/imunologia , Humanos , Masculino , Neutropenia/sangue
11.
J Med Virol ; 44(3): 223-8, 1994 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-7852964

RESUMO

Between 1984 and 1990, virus was routinely isolated and serum collected from patients diagnosed at hospitals in the Western Cape as suffering from AIDS or AIDS-related conditions (ARC). From these, 17 virus strains were selected at random for sequencing and molecular characterisation of the env gene. The strains were previously characterised as belonging to HIV-1 subtypes B, C and D. The purpose of the present study was to evaluate retrospectively the serological diagnosis of HIV-1 in these 17 South African patients. Thirteen anti-HIV screening assays, including 7 rapid/simple test devices (RTDs), 4 enzyme-linked immunosorbent assays (EIAs) and 2 Western immunoblot assays were evaluated. Using commercial EIAs, 16 serum samples were HIV antibody-positive and these results were confirmed by Western immunoblot analysis. Serum from one terminal AIDS patient was found negative with all the serological tests. Some RTDs gave false negative antibody reactions on specimens from patients infected with subtype D strains. To investigate the false negative antibody reactions, the polymerase chain reaction (PCR) was used to amplify, clone and sequence proviral DNA from the immunodominant gp41 region from 7 of the HIV-1 strains. Two patients, both subtype D strains (D214 and D482) with false negative results in the RTDs, showed a significant amino acid substitution, i.e., substitution of a histidine residue for leucine at env position 607. It was concluded that although there were false negative RTD reactions on patients with HIV-1 subtype D strains, the commercial EIAs tested are sensitive and are able to detect patients infected with HIV-1 subtypes B, C and D that are present in South Africa.


Assuntos
Anticorpos Anti-HIV/sangue , Infecções por HIV/diagnóstico , HIV-1/imunologia , Kit de Reagentes para Diagnóstico , Complexo Relacionado com a AIDS/sangue , Complexo Relacionado com a AIDS/diagnóstico , Complexo Relacionado com a AIDS/epidemiologia , Síndrome da Imunodeficiência Adquirida/sangue , Síndrome da Imunodeficiência Adquirida/diagnóstico , Síndrome da Imunodeficiência Adquirida/epidemiologia , Sequência de Bases , Western Blotting/métodos , Estudos de Avaliação como Assunto , Variação Genética , Proteína gp41 do Envelope de HIV/genética , Infecções por HIV/sangue , Infecções por HIV/epidemiologia , HIV-1/classificação , HIV-1/genética , Humanos , Imunoensaio/métodos , Técnicas Imunoenzimáticas , Dados de Sequência Molecular , Reação em Cadeia da Polimerase , Reprodutibilidade dos Testes , África do Sul/epidemiologia , Especificidade da Espécie
13.
Clin Infect Dis ; 19(2): 327-8, 1994 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-7986909

RESUMO

We developed and evaluated an automated screening test for antibody to human immunodeficiency virus type 1 (HIV-1) using EDTA-2Na-treated whole blood and an extract of paper disk-absorbed dried whole blood from 60 hemophiliacs infected with HIV-1 and 210 diseased and healthy controls. The specificity and the sensitivity of this system were judged to be 100% with both the whole blood and the extract. This test allows measurement of HIV-1 antibody in whole blood and dried whole blood on a small paper disk and gives a result within 13 minutes; the system can process 150 samples per hour. Therefore, it may be useful at many testing sites, such as emergency departments, intensive care units, blood banks, and commercial laboratories, as well as for mail-order testing from remote areas and developing countries.


Assuntos
Sorodiagnóstico da AIDS/métodos , Complexo Relacionado com a AIDS/sangue , Síndrome da Imunodeficiência Adquirida/sangue , Anticorpos Anti-HIV/análise , HIV-1/imunologia , Hemofilia A/sangue , Complexo Relacionado com a AIDS/complicações , Síndrome da Imunodeficiência Adquirida/complicações , Autoanálise , Hemofilia A/complicações , Humanos , Imunoensaio/métodos , Medições Luminescentes , Sensibilidade e Especificidade
14.
Chem Biol Interact ; 91(2-3): 141-6, 1994 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-8194130

RESUMO

Neutrophils from asymptomatic HIV-infected patients have an increased Nitroblue tetrazolium (NBT) reduction, that is an increased production of oxygen radicals. Plasma from these patients can activate normal neutrophils to an increased NBT-reduction and the neutrophil activating factor thus seems to be mainly plasma bound. Further, the patients also have increased levels of plasma malondialdehyde and thus an increased lipid peroxidation. Plasma cysteine levels are low, a sign of increased consumption of antioxidants. Treatment of the asymptomatic HIV-infected patients with N-acetylcysteine corrected the plasma cysteine levels and had some beneficial effects, but did not inhibit the increased radical production by the neutrophils.


Assuntos
Acetilcisteína/uso terapêutico , Infecções por HIV/sangue , Neutrófilos/metabolismo , Superóxidos/sangue , Complexo Relacionado com a AIDS/sangue , Síndrome da Imunodeficiência Adquirida/sangue , Adulto , Cisteína/sangue , Feminino , Radicais Livres , Infecções por HIV/tratamento farmacológico , Humanos , Masculino , Oxirredução , Ensaios Clínicos Controlados Aleatórios como Assunto
15.
J Med Virol ; 43(1): 28-32, 1994 May.
Artigo em Inglês | MEDLINE | ID: mdl-7916032

RESUMO

A simple and rapid assay for the quantification of infectious HIV-1 in plasma was developed using short-term culture and DNA PCR. This method, called culture PCR, allows detection and quantification of infectious HIV-1 viraemia within 48 hours, and measures the number of infectious cell-free HIV-1 particles, expressed as culture PCR infectious doses (CPID/ml). 42 HIV infected subjects were assessed by this method. The titres obtained by CPID closely correlated with CD4+ count and clinical status. CPID titres had significant correlation with infectious virus titre determined by conventional limiting dilution tissue-culture methods. This culture-PCR technique permits rapid assessment of infectious plasma viraemia, and is comparable to longer culture based assay methods.


Assuntos
Complexo Relacionado com a AIDS/diagnóstico , Síndrome da Imunodeficiência Adquirida/diagnóstico , DNA Viral/sangue , Soropositividade para HIV/diagnóstico , HIV-1/isolamento & purificação , Reação em Cadeia da Polimerase/métodos , Viremia/diagnóstico , Complexo Relacionado com a AIDS/sangue , Síndrome da Imunodeficiência Adquirida/sangue , Sequência de Bases , Linfócitos T CD4-Positivos/imunologia , Células Cultivadas , Técnicas de Cultura/métodos , Primers do DNA , DNA Viral/isolamento & purificação , Proteína do Núcleo p24 do HIV/análise , Soropositividade para HIV/sangue , Humanos , Contagem de Leucócitos , Linfócitos/citologia , Dados de Sequência Molecular , Valor Preditivo dos Testes , Viremia/sangue
16.
Rom J Intern Med ; 32(2): 87-118, 1994.
Artigo em Inglês | MEDLINE | ID: mdl-7920333

RESUMO

Selective tropism of human immunodeficiency virus (HIV) for cells with CD4 receptors and especially for TH lymphocytes--key cells in hematopoiesis--has from the clinico-biologic point of view a great many hematologic manifestations of which knowledge is essential for a good diagnosis and treatment as well as for a judicious estimation of prognosis. Thus the study presents the hematologic entities specifically associated with HIV infection (such as ITP, NHML) as well as the hematologic entities associated with HIV infection without presenting a causal relationship with the latter. The study also discusses the quantitative and morphologic changes of peripheral blood and of bone marrow often enlightening for the disease and its complications. An important chapter in the study is devoted to the hematologic changes induced by the HIV infection therapy as well as by the manners of therapeutic approach to the complex hematologic problems raised by the disease.


Assuntos
Infecções por HIV/complicações , HIV-1 , Doenças Hematológicas/etiologia , Complexo Relacionado com a AIDS/sangue , Complexo Relacionado com a AIDS/complicações , Complexo Relacionado com a AIDS/diagnóstico , Síndrome da Imunodeficiência Adquirida/sangue , Síndrome da Imunodeficiência Adquirida/complicações , Síndrome da Imunodeficiência Adquirida/diagnóstico , Infecções por HIV/sangue , Infecções por HIV/diagnóstico , Doenças Hematológicas/sangue , Doenças Hematológicas/diagnóstico , Humanos , Linfoma Relacionado a AIDS/sangue , Linfoma Relacionado a AIDS/diagnóstico , Linfoma Relacionado a AIDS/etiologia
17.
Infection ; 22(2): 86-91, 1994.
Artigo em Inglês | MEDLINE | ID: mdl-7915256

RESUMO

In order to evaluate tolerance, toxicity, and in vivo antigenicity, 29 HIV-1-infected patients (eight with ARC and 21 with AIDS) were vaccinated with a synthetic peptide derived from the gp41 transmembrane protein of the HIV-1. This peptide had been coupled with 2.4 dinitrophenyl-Ficoll (F46), a T-cell independent adjuvant. The patients received a single intradeltoid injection of either 0.1 or 0.3 mg of F46. Five of the individuals with AIDS were boostered, four of them twice. Anti-F46 antibody titers were measured before vaccination, and on days 7, 14, 21, 28, 90, 180 and 270 after vaccination. Anti-F46 titers rose at least twofold over prestudy values in 10/21 individuals with AIDS and in 1/8 individuals with ARC at least once during the observation period. The overall response, however, consisted of only weak antibody production that was independent of the dose or patient characteristics. No signs of toxicity or of clinical progression related to the vaccination were observed in this phase I/II trial of a T-cell independent therapeutic vaccine.


Assuntos
Vacinas contra a AIDS/uso terapêutico , Complexo Relacionado com a AIDS/terapia , Síndrome da Imunodeficiência Adquirida/terapia , Adjuvantes Imunológicos/uso terapêutico , Antígenos/imunologia , Linfócitos T CD4-Positivos , Ficoll/análogos & derivados , Proteína gp41 do Envelope de HIV/imunologia , HIV-1 , Proteínas Recombinantes/uso terapêutico , Vacinas Sintéticas/uso terapêutico , Complexo Relacionado com a AIDS/sangue , Complexo Relacionado com a AIDS/imunologia , Síndrome da Imunodeficiência Adquirida/sangue , Síndrome da Imunodeficiência Adquirida/imunologia , Adulto , Feminino , Ficoll/imunologia , Anticorpos Anti-HIV/sangue , HIV-1/imunologia , Humanos , Imunização Secundária/métodos , Injeções Intramusculares , Contagem de Leucócitos , Masculino , Pessoa de Meia-Idade
18.
J Acquir Immune Defic Syndr (1988) ; 7(2): 109-15, 1994 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-8301523

RESUMO

Expression of tumor necrosis factor alpha (TNF alpha), interleukin 1 beta (IL-1 beta), and interleukin 6 (IL-6) was evaluated in unstimulated peripheral blood monocytes obtained from human immunodeficiency virus-positive (HIV+) individuals using a reverse transcription-polymerase chain reaction (RT-PCR) method. In all, 40 subjects were included--13 asymptomatic, 11 with ARC, seven with AIDS, and nine HIV- controls. Of the asymptomatic individuals, 85% were positive for TNF alpha and IL-1 beta compared with only 27% of the ARC and 42% of the AIDS patients. Expression of IL-6 message was observed in lesser proportions, with no significant differences among disease states. Quantitation of IL-1 beta and TNF alpha mRNA from the positive samples fell into two categories, low responders (six of 17), with < 5,000 copies of IL-1 beta and TNF alpha mRNA, and high responders (11 of 17), with > 5,000 copies per 10 pg of total cellular RNA. There was no correlation of mRNA detection or concentration with CD4+ cell number or beta 2-microglobulin levels. However, the levels of mRNA, but not its presence alone, were positively correlated with neopterin levels. The data show differential cytokine regulation in monocytes, observed as an increase in the expression of TNF alpha and IL-1 beta compared with IL-6 in HIV+ patients. Our report also emphasizes the utility of an RT-PCR system in analyzing multiple cytokine transcript levels in small amounts of clinical materials.


Assuntos
Regulação da Expressão Gênica , Infecções por HIV/imunologia , Interleucina-1/biossíntese , Interleucina-6/biossíntese , Monócitos/imunologia , Fator de Necrose Tumoral alfa/biossíntese , Complexo Relacionado com a AIDS/sangue , Complexo Relacionado com a AIDS/imunologia , Síndrome da Imunodeficiência Adquirida/sangue , Síndrome da Imunodeficiência Adquirida/imunologia , Relação CD4-CD8 , Infecções por HIV/sangue , Soropositividade para HIV/sangue , Soropositividade para HIV/imunologia , Humanos , Interleucina-1/genética , Interleucina-6/genética , Reação em Cadeia da Polimerase , RNA Mensageiro/análise , Análise de Regressão , Transcrição Gênica , Fator de Necrose Tumoral alfa/genética
19.
Antimicrob Agents Chemother ; 38(2): 260-7, 1994 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-7910722

RESUMO

GLQ223 is a highly purified single-chain ribosome-inactivating protein with selective effects against a variety of cells, including macrophages infected with human immunodeficiency virus. We evaluated the safety, pharmacokinetics, and immunologic effects of multiple doses of GLQ223 in 22 patients with AIDS or AIDS-related complex; CD4+ T-cell counts were between 100 and 350/mm3. GLQ223 was administered intravenously at doses of 8, 16, 24, 36, and 50 micrograms/kg of body weight; the drug was administered by constant infusion over 3 h to achieve a concentration in serum of 50 ng/ml; this concentration is known to be associated with anti-HIV effects in vitro. All patients reported a flu-like syndrome characterized by muscle and joint aches and an increase in creatinine kinase levels; symptoms were controlled easily. For patients who received 36 and 50 micrograms/kg, target concentrations in serum were achieved and an increase in CD4+ and CD8+ T cells was sustained; this sustained increase persisted for at least 28 days after the last infusion. beta 2-Microglobulin levels increased during the infusions and then declined when the infusions ended. Repeat infusions of GLQ223 were safe and relatively well tolerated. The target concentration of GLQ223 in serum was achieved and sustained. Our results suggest that GLQ223 may have activity in treating patients with human immunodeficiency virus infection.


Assuntos
Complexo Relacionado com a AIDS/tratamento farmacológico , Complexo Relacionado com a AIDS/metabolismo , Síndrome da Imunodeficiência Adquirida/tratamento farmacológico , Síndrome da Imunodeficiência Adquirida/metabolismo , Tricosantina/farmacocinética , Tricosantina/uso terapêutico , Complexo Relacionado com a AIDS/sangue , Síndrome da Imunodeficiência Adquirida/sangue , Adulto , Linfócitos T CD4-Positivos/citologia , Linfócitos T CD4-Positivos/efeitos dos fármacos , Relação Dose-Resposta a Droga , Humanos , Recém-Nascido , Infusões Intravenosas , Contagem de Leucócitos/efeitos dos fármacos , Pessoa de Meia-Idade , Tricosantina/efeitos adversos
20.
Endocr J ; 41(1): 13-8, 1994 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-7951546

RESUMO

A 46-year-old man was admitted because of hypotension and consciousness disturbance. He was a patient with hemophilia B, and diagnosed as having an AIDS-related complex 2 years prior to admission. On admission he had severe hyponatremia. Hormonal studies revealed that he had Addison's disease. Serum cytomegalovirus (CMV) antibody titers were high, and a CMV antigen was detected in his urine, which suggested CMV adrenalitis caused by an active CMV infection. After the administration of hydrocortisone and ganciclovir, his general clinical condition and biochemical test results were back to normal. However, the adrenal dysfunction was irreversible, despite the treatment with ganciclovir. With an increase in the number of AIDS patients, we have to consider adrenal insufficiency due to a CMV infection in patients with AIDS.


Assuntos
Complexo Relacionado com a AIDS/complicações , Doença de Addison/complicações , Infecções por Citomegalovirus/complicações , Complexo Relacionado com a AIDS/sangue , Complexo Relacionado com a AIDS/tratamento farmacológico , Doença de Addison/sangue , Doença de Addison/tratamento farmacológico , Hormônio Adrenocorticotrópico/sangue , Infecções por Citomegalovirus/sangue , Infecções por Citomegalovirus/tratamento farmacológico , Ganciclovir/uso terapêutico , Humanos , Hidrocortisona/uso terapêutico , Masculino , Pessoa de Meia-Idade
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...