PubMed Health⌕ Search

Biomedical subjects

A Lafeuillade

Publications and source records attributed to A Lafeuillade.

At least 55 records · Page 3Linked to original sources
PubMed1994

Comparison of viral burden and phenotype of HIV-1 isolates from lymph nodes and blood.

OBJECTIVE: To compare the viral burden and the biological phenotype of HIV-1 isolates obtained from lymphoid node mononuclear cells (LNMC) and peripheral blood mononuclear cells (PBMC) in 11 HIV-infected patients. METHODS: Viral burden was quantified by cocultivating LNMC and PBMC from HIV-infected patients with PBMC from seronegative donors. For each patient, LNMC and PBMC isolates were characterized in terms of susceptibility to neutralizing antibodies, syncytium-inducing capacity and sensitivity to zidovudine. RESULTS: Our data show that: (1) viral burden was 1.73 log higher in LNMC than PBMC in patients with persistent generalized lymphadenopathy and only 0.37 log higher in patients with AIDS-related complex; (2) five out of 11 LNMC bulk isolates were phenotypically distinct from autologous PBMC isolates; (3) in three patients, the autologous serum neutralized the PBMC isolates but not the LNMC isolates. CONCLUSIONS: These results suggest that the relatively high level of HIV-1 replication in lymph nodes may favour the emergence of viruses exhibiting specific phenotypes, including neutralization escape variants. The existence of viral variants in lymphoid tissue at all stages of HIV infection may elucidate certain aspects of the pathogenesis of HIV-1 infection.

Acquired Immunodeficiency Syndrome↗
PubMed1994

[Myasthenic syndrome disclosing Hodgkin disease].

A case of myasthenia associated with Hodgkin's disease with probable invasion of the thymus is reported. Five cases of association between lymphomatous thymoma and myasthenia (2 Hodgkin's thymomas and 3 non-Hodgkin's lymphomatous thymomas) have previously been reported. Myasthenia healed after the lymphoma was treated. This association raises pathogenic problems in the 3 cases of non-Hodgkin's thymoma where invasion of the thymus erased all its normal structure.

Adult↗
PubMed1994

Correlation between surrogate markers, viral load, and disease progression in HIV-1 infection.

Surrogate markers generally used for observation of patients infected with human immunodeficiency virus (HIV) and their plasma and cellular viral load were assayed in a series of 40 patients before initiation of zidovudine therapy. Plasma viremia was positive in 62.5% of patients and was statistically correlated with clinical stage, CD4+ T cell count, CD8+ T cell count, beta 2-microglobulin level, neopterin level, and immunoglobulin A level. Cellular viremia was positive in 95% of patients and was correlated with clinical stage, CD4+ T cell count, beta 2-microglobulin, neopterin levels, and disease progression during the following months. A discordance was found between p24 antigenemia, even after acid dissociation of immune complexes, and plasma viremia. In fact, p24 antigenemia was correlated with only biological markers of immune activation as beta 2-microglobulin and neopterin levels. The measurement of anti-p24 antibodies did not appear discriminative in our staging. Plasma viremia, like CD4+ T cell count, reflects the patient's status at the time of assessment. Cellular viremia could be more informative for the prediction of future clinical progression.

Adult↗
PubMed1992

[HIV cofactors in the course of AIDS].

The responsibility of HIV in the occurrence of AIDS is definitely established, but "cofactors" are strongly suspected to intervene, which would explain the difference courses followed by the disease in one patient or the other. Some of these cofactors are related to the host or result from his behaviour. Thus, age at the time of HIV acquisition and the patient's HLA group are associated with differences in the speed of progression towards AIDS. Attitudes that lead to reexposure to the virus by the sexual or intravenous routes shorten the duration of the asymptomatic phase. Other cofactors are environmental in nature. Among the infectious agents, cytomegalovirus and some mycoplasmas have been the object of the most through studies. The responsibility of some physicochemical substances, such as cocaine, vitamin D and corticosteroids, acting as cofactors of increasing severity, mostly rests on data obtained in vitro and need clinical confirmation in man. However, the study of cofactors already seems to be a promising line of research aimed at understanding AIDS and hence its therapeutic approach.

AIDS-Related Opportunistic Infections↗