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Efficient gene transfer into hematopoietic cells by a retargeting adenoviral vector system with a chimeric fiber of adenovirus serotype 5 and 11p.

Abstract：

OBJECTIVE:Adenoviral vectors (Ad) were widely used in gene therapy and study of gene function, but the commonly used serotype 5 adenovirus-based vectors (Ad5) could poorly transduce hematopoietic cells because of low expression of viral receptors on these cells. To overcome this limitation, we developed a retargeting adenovector with a chimeric fiber of Ad5 and Ad11p (Ad5F11p) and evaluated its gene transfer ability in hematopoietic cells. MATERIALS AND METHODS:An Ad11p fiber pseudotyped Ad5 vector was generated by modifying the fiber gene of pAdEasy-1 backbone plasmid. Ad5F11p-GFP encoding enhanced green fluorescence protein (GFP) gene was transferred into human leukemic cell lines, primary leukemic cells, and CD34(+) hematopoietic cells. The gene transduction efficiency was determined by fluorescence-activated cell sorting assay. RESULTS:More than 90% of U937 or K562 cells could be infected by Ad5F11p-GFP at a moderate multiplicity of infection (MOI). Ad5F11p-GFP is also significantly more effective than control Ad5-GFP in infection of primary myeloid leukemic cells. At 200 MOI, GFP-positive percentages of Ad5F11p-GFP transduced myeloid leukemic cells range from 10.58% to 92.63% with a median of 28.65%. Ad5F11p-GFP could transduce about 50% human hematopoietic stem/progenitor (CD34(+)) cells, while Ad5-GFP could transduce <15% at 200 MOI. CD46 was reported to be the receptor of Ad11p. Our data suggest that CD46 participates in the process of Ad5F11p-GFP infection but is not the unique molecule determining its gene transfer efficiency of host cells. CONCLUSION:We established a retargeting adenovector system, which could infect hematopoietic cells effectively and would benefit research work on Ad tropism.

journal_name

Exp Hematol

journal_title

Experimental hematology

authors

Lu ZZ,Ni F,Hu ZB,Wang L,Wang H,Zhang QW,Huang WR,Wu CT,Wang LS

doi

10.1016/j.exphem.2006.05.005

subject

Has Abstract

pub_date

2006-09-01 00:00:00

pages

1171-82

issue

eissn

0301-472X

issn

1873-2399

pii

S0301-472X(06)00316-X

journal_volume

pub_type

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Efficient gene transfer into hematopoietic cells by a retargeting adenoviral vector system with a chimeric fiber of adenovirus serotype 5 and 11p.