Use of oncoretroviral vectors in gene therapy for hemoglobinopathies has been impeded by low titer vectors, genetic instability, and poor expression. Fifteen self-inactivating (SIN) lentiviral vectors using 4 erythroid promoters in combination with 4 erythroid enhancers with or without the woodchuck hepatitis virus postregulatory element (WPRE) were generated using the enhanced green fluorescent protein as a reporter gene. Vectors with high erythroid-specific expression in cell lines were tested in primary human CD34(+) cells and in vivo in the murine bone marrow (BM) transplantation model. Vectors containing the ankyrin-1 promoter showed high-level expression and stable proviral transmission. Two vectors containing the ankyrin-1 promoter and 2 erythroid enhancers (HS-40 plus GATA-1 or HS-40 plus 5-aminolevulinate synthase intron 8  enhancers) and WPRE expressed at levels higher than the HS2/beta -promoter vector in bulk unilineage erythroid cultures and individual erythroid blast-forming units derived from human BM CD34+ cells. Sca1(+)/lineage(-) Ly5.1 mouse hematopoietic cells, transduced with these 2 ankyrin-1 promoter vectors, were injected into lethally irradiated Ly5.2 recipients. Eleven weeks after transplantation, high-level expression was seen from both vectors in blood (63%-89% of red blood cells) and erythroid cells in BM (70%-86% engraftment), compared with negligible expression in myeloid and lymphoid lineages in blood, BM, spleen, and thymus (0%-4%). The 18/HS-40-containing vector encoding a hybrid human beta/gamma -globin gene led to 43% to 113% human gamma -globin expression/copy of the mouse alpha -globin gene. Thus, modular use of erythroid-specific enhancers/promoters and WPRE in SIN-lentiviral vectors led to Identification of high-titer, stably transmitted vectors with high-level erythroid-specific expression for gene therapy of red cell diseases.
|Anno di pubblicazione:||2001|
|Titolo:||High-level erythroid-specific gene expression in primary human and murine hematopoietic cells with self-inactivating lentiviral vectors|
|Autore/i:||F. Moreau-Gaudry; P. Xia; G. Jiang; NP Perelman; G. Bauer; J. Ellis; KH Surinya; F. Mavilio; CK Shen; P. Malik|
|Codice identificativo ISI:||WOS:000171855900012|
|Codice identificativo Scopus:||2-s2.0-0035525735|
|Tipologia||Articolo su rivista|
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