Concentrated RD114-pseudotyped MFGS-gp91phox vector achieves high levels of functional correction of the chronic granulomatous disease oxidase defect in NOD/SCID/beta -microglobulin-/- repopulating mobilized human peripheral blood CD34+ cells.
In previous studies amphotropic MFGS-gp91phox (murine onco-retrovirus vector) was used in a clinical trial of X-linked chronic granulomatous disease (X-CGD) gene therapy to achieve transient correction of oxidase activity in 0.1% of neutrophils. We later showed that transduced CD34+ peripheral blood stem cells (CD34+ PBSCs) from this trial transplanted into nonobese diabetic/severe combined immunodeficient (NOD/SCID) mice resulted in correction of only 2.5% of human neutrophils. However, higher rates of transduction into stem cells are required. In the current study we demonstrate that the same vector (MFGS-gp91phox) pseudo-typed with RD114 envelope in a 4-day culture/transduction regimen results in a 7-fold increase in correction of NOD/SCID mouse repopulating X-CGD CD34+ PBSCs (14%-22% corrected human neutrophils; human cell engraftment 13%-67%). This increase may result from high expression of receptor for RD114 that we demonstrate on CD34+CD38- stem cells. Using RD114-MFGS encoding cyan fluorescent protein to allow similar studies of normal CD34+ PBSCs, we show that progressively higher levels of gene marking of human neutrophils (67%-77%) can be achieved by prolongation of culture/transduction to 6 days, but with lower rates of human cell engraftment. Our data demonstrate the highest reported level of functional correction of any inherited metabolic disorder in human cells in vivo with the NOD/SCID mouse system using onco-retrovirus vector.
Brenner
Sebastian
S
Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bldg 10, Rm 11N112, 10 Center Dr, MSC 1886, Bethesda, MD 20892-1886, USA. sbrenner@nih.gov
Whiting-Theobald
Narda L
NL
Linton
Gilda F
GF
Holmes
Kevin L
KL
Anderson-Cohen
Mindy
M
Kelly
Patrick F
PF
Vanin
Elio F
EF
Pilon
André M
AM
Bodine
David M
DM
Horwitz
Mitchell E
ME
Malech
Harry L
HL
D000818:Animals; D018952:Antigens, CD34 / Q000096:biosynthesis; D005434:Flow Cytometry; D018014:Gene Transfer Techniques; D015316:Genetic Therapy / Q000379:methods; D005822:Genetic Vectors; D006105:Granulomatous Disease, Chronic / Q000235:genetics* / Q000628:therapy; D049452:Green Fluorescent Proteins; D006412:Hematopoietic Stem Cells; D006801:Humans; D008164:Luminescent Proteins / Q000378:metabolism; D008562:Membrane Glycoproteins / Q000235:genetics*; D051379:Mice; D016688:Mice, Inbred NOD; D016513:Mice, SCID; D009249:NADP / Q000378:metabolism; D000074662:NADPH Oxidase 2; D019255:NADPH Oxidases; D009504:Neutrophils / Q000378:metabolism; D010088:Oxidoreductases / Q000235:genetics*; D012333:RNA, Messenger / Q000378:metabolism; D012190:Retroviridae / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013234:Stem Cells / Q000378:metabolism; D013997:Time Factors; D019076:Transgenes; D014461:Ultracentrifugation; D001613:beta 2-Microglobulin / Q000235:genetics
D018952:Antigens, CD34; D008164:Luminescent Proteins; D008562:Membrane Glycoproteins; D012333:RNA, Messenger; D001613:beta 2-Microglobulin; D049452:Green Fluorescent Proteins; D009249:NADP; D010088:Oxidoreductases; C056558:CYBB protein, human; D000074662:NADPH Oxidase 2; D019255:NADPH Oxidases