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- W1972464872 abstract "The F240 human monoclonal antibody specifically recognizes the disulfide loop-bonded immunodominant epitope of gp41 spanning residues 592–606 and expressed broadly on HIV-1 primary isolates. Despite broad reactivity with native virions and HIV-infected cells, the antibody fails to neutralize infection. However, cytoplasmic expression of single-chain antibody (scFv) directed against gp41 of HIV-1 provides a rationale means to inhibit the maturation of envelope protein. The variable regions of the heavy chain and light chain of human monoclonal antibody were amplified by PCR and linked by a 15 amino acid (GGSGS)3 linker in an orientation of VL-linker-VH and retroviral expression vectors were constructed to simultaneously express F240 scFv and eGFP to facilitate selection of scFv-producing cells. Incorporation of a human immunoglobulin signal sequence directed secretion of the F240 scFv (s-scFv) while an otherwise identical vector lacked this sequence (scFv) resulting in intracellular expression of scFv. Transduced human CD4+ H9 T cells were challenged with HIV. While both secreted and nonsecreted F240 scFv inhibited viral production, secretory F240 scFv was more potent. Thus, this novel approach to direct expression of a nonneutralizing scFv using the Ig signal sequence suggests that targeted therapy using antibodies to conserved, highly expressed epitopes may result in a decrease in viral production due to a reduction of viral assembly and/or transport and expression." @default.
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- W1972464872 date "2005-10-01" @default.
- W1972464872 modified "2023-10-18" @default.
- W1972464872 title "Human Single-Chain Antibodies Inhibit Replication of Human Immunodeficiency Virus Type 1 (HIV-1)" @default.
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- W1972464872 doi "https://doi.org/10.1089/aid.2005.21.876" @default.
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