Transduction of primitive human marrow and cord blood-derived hematopoietic progenitor cells with adeno-associated virus vectors.

Important note: Information in this article was accurate in 1999. The state of the art may have changed since the publication date.

Transduction of primitive human marrow and cord blood-derived hematopoietic progenitor cells with adeno-associated virus vectors.

Blood. 1999 Mar 15;93(6):1882-94. Unique Identifier : AIDSLINE MED/99168976
Chatterjee S; Li W; Wong CA; Fisher-Adams G; Lu D; Guha M; Macer JA; Forman SJ; Wong KK Jr; Division of Pediatrics, Department of Hematology and Bone Marrow; Transplantation, City of Hope National Medical Center, Duarte,; CA, USA. schatterjee@coh.org

Abstract: We evaluated the capacity of adeno-associated virus (AAV) vectors to transduce primitive human myeloid progenitor cells derived from marrow and cord blood in long-term cultures and long-term culture-initiating cell (LTC-IC) assays. Single-colony analyses showed that AAV vectors transduced CD34(+) and CD34(+)38(-) clonogenic cells in long-term culture. Gene transfer was readily observed in LTC-ICs derived from 5-, 8-, and 10-week cultures. Recombinant AAV (rAAV) transduction was observed in every donor analyzed, although a wide range of gene transfer frequencies (5% to 100%) was noted. AAV transduction of LTC-ICs was stable, with week-8 and -10 LTC-ICs showing comparable or better transduction relative to week-5 LTC-ICs. Fluorescence in situ hybridization (FISH) analyses performed to determine the fate of AAV vectors in transduced cells showed that 9% to 28% of CD34(+) and CD34(+)38(-) cells showed stable vector integration as evidenced by chromosome-associated signals in metaphase spreads. Comparisons of interphase and metaphase FISH suggested that a fraction of cells also contained episomal vector at early time points after transduction. Despite the apparent loss of the episomal forms with continued culture, the number of metaphases containing integrated vector genomes remained stable long term. Transgene transcription and placental alkaline phosphatase (PLAP) expression was observed in CD34(+), CD34(+)38(-) LTC-ICs in the absence of selective pressure. These results suggest that primitive myeloid progenitors are amenable to genetic modification with AAV vectors.

Keywords: JOURNAL ARTICLE Alkaline Phosphatase/GENETICS Antigens, CD34/ANALYSIS Bone Marrow Cells/*METABOLISM Cells, Cultured Dependovirus/*GENETICS Gene Expression *Gene Transfer *Genetic Vectors Granulocytes Hematopoietic Stem Cells/*METABOLISM Human HIV Long Terminal Repeat/GENETICS In Situ Hybridization, Fluorescence Macrophages Placenta/ENZYMOLOGY RNA, Antisense Support, U.S. Gov't, P.H.S. Time Factors Transcription, Genetic
990630
A9960996

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