Intracellular expression of antibody fragments directed against HIV reverse transcriptase prevents HIV infection in vitro

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Abstract
We have tested a novel strategy of intracellular immunization to block human immunodeficiency virus (HIV) infection. The expression of a specific antibody within a cell was achieved by transduction of genes that encode for immunoglobulin chains with specificity to viral reverse transcriptase. We demonstrated that inhibition of this enzyme makes cells resistant to HIV infection by blocking an early stage of viral replication. If high efficiency transduction with a stable vector into lymphohaematopoietic stem cells or mature lymphocytes can be achieved, gene transfer-mediated intracellular immunization might be a feasible treatment strategy in AIDS.

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