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Leukocyte extract reduces HIV replication and modulates cellular factors involved in HIV infection: therapeutic meant
© Fernandez-Ortega et al; licensee BioMed Central Ltd. 2010
Published: 8 November 2010
The development of antiretroviral therapies to combat human immunodeficiency virus (HIV) infection has resulted in a decrease in morbidity and mortality associated with the acquired immunodeficiency syndrome (AIDS). Despite these therapeutic advances, problems of drug resistance, latent viral reservoirs, and drug induced toxic effects that compromise effective viral control point to the need for new classes of anti-HIV drugs with different modes of action. Dialyzable Leukocyte Extract (DLE) is a low molecular weight dialyzable material obtained from human leukocytes. A clinical trial of six years of follow-up was carried out using a DLE preparation in asymptomatic HIV patients. Twenty-eight percent of the untreated individual showed disease progression, while only progressed to AIDS 7% of DLE-treated patients. These results indicate that DLE delays disease progression. However, the molecular basis supporting this effect remained unknown.
Purpose of the study
To demonstrate anti-HIV activity in DLE and show DLE modulation on cellular factors involved in HIV replication.
Using an in vitro infection model on MT4 cell line we study the effect of DLE on HIV replication. We study the effect of DLE on important cellular factors like NFkB, Sp1 and TNF in MT4 cells or peripheral blood mononuclear cells.
Summary of results
DLE effect on cellular factors involved in HIV replication correlates with DLE inhibitory effect on HIV in vitro replication. The inhibition of HIV replication observed with DLE treatment could be mediated by inhibition of transcription factors that may promote replication of HIV. Also, it could be mediated or potentiated by modulation TNF and others endogenous factors involved in HIV replication. These finding could support the use of DLE on HIV patients.
This article is published under license to BioMed Central Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.