Abstract
Cell surface receptors, such as the CCR5 chemokine receptors, represent key determinants of the human immunodeficiency virus type 1 (HIV-1) entry into target cells. The CC-chemokine, RANTES (regulated upon activation, normal T-cell expressed and secreted), a ligand for CCR5, have been targeted to the lumen of endocytoplasmic reticulum (ER) using a KDEL (ER-retention signal) fusion termed RANTES-KDEL and this construct was found to prevent effectively transport of newly synthesized CCR5 to the cell surface. Lentiviral vectors have emerged as potent and versatile tools of gene transfer for basic and applied research are able to transduce nondividing cells and maintain sustained long-term expression of transgenes. For this reason, an HIV-based lentiviral vector expressing RANTES-KDEL, pLenti6/V5-R-K, was constructed and then cotransfected with the ViraPower Packaging Mix (pLP1, pLP2, and pLP/VSVG) into 293FT cells to produce a replication-incompetent lentivirus stock. The lentiviral stock was titrated using HeLa cells, and the expression of the gene of interest, RANTES, was detected by indirect immunofluorescence. Based on the above results, the lentiviral stock was transduced into CD34(+) human hematopoietic stem cells (hHSC) sep...Continue Reading
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