Document Detail

Manipulation of the cytoplasmic and transmembrane domains alters cell surface levels of the coxsackie-adenovirus receptor and changes the efficiency of adenovirus infection.
MedLine Citation:
PMID:  11177539     Owner:  NLM     Status:  MEDLINE    
Expression of the coxsackie-adenovirus receptor (CAR) is a critical determinant in cellular susceptibility to infection with adenovirus-based gene transfer vectors. This study is focused on the hypothesis that manipulation of the cytoplasmic tail and transmembrane regions of CAR can be used to change cell surface levels of CAR and, consequently, to alter the efficiency of Ad-mediated gene transfer. To accomplish this, Flag-tagged ([F]) human CAR ([F]CAR), [F]tailless-CAR (lacking the cytoplasmic tail), and [F]GPI-CAR (containing a GPI lipid anchor instead of the transmembrane and cytoplasmic regions) were exogenously expressed in CHO cells. Analysis of (125)I-labeled anti-Flag antibody binding to transfected cells revealed that [F]tailless-CAR and [F]GPI-CAR were expressed on the cell surface in 1.8- to 2.5-fold higher amounts than [F]CAR, while the total expression levels were similar. Infection with replication-deficient adenovirus encoding beta-galactosidase (Ad-betagal) demonstrated 1.5- to 2-fold higher levels of transgene expression in CHO cells expressing [F]tailless-CAR or [F]GPI-CAR, respectively, compared with cells containing [F]CAR. The form of CAR expressed did not affect the transport of fluorescent Cy3-Ad particles from the cell surface to the nuclear region. These observations indicate that transduction of target cells by Ad vectors can be optimized by increasing cell surface levels of CAR through functional deletion of the tail and membrane protein domains.
W van't Hof; R G Crystal
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Human gene therapy     Volume:  12     ISSN:  1043-0342     ISO Abbreviation:  Hum. Gene Ther.     Publication Date:  2001 Jan 
Date Detail:
Created Date:  2001-02-22     Completed Date:  2001-04-05     Revised Date:  2011-07-01    
Medline Journal Info:
Nlm Unique ID:  9008950     Medline TA:  Hum Gene Ther     Country:  United States    
Other Details:
Languages:  eng     Pagination:  25-34     Citation Subset:  IM    
Division of Pulmonary and Critical Care Medicine, Weill Medical College of Cornell University, New York, NY 10021, USA.
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MeSH Terms
Adenoviridae / physiology*
Adenoviridae Infections / metabolism*
CHO Cells / metabolism
COS Cells
DNA Primers / chemistry,  classification
Enterovirus / physiology*
Fluorescent Dyes / diagnostic use
Gene Transfer Techniques
Genetic Vectors
Glycosylphosphatidylinositols / metabolism
Peptides / metabolism
Phosphatidylinositol Diacylglycerol-Lyase
RNA, Messenger / analysis
Receptors, Virus / metabolism*
Type C Phospholipases / pharmacology
beta-Galactosidase / genetics
Grant Support
Reg. No./Substance:
0/CXADR-like membrane protein; 0/DNA Primers; 0/Fluorescent Dyes; 0/Glycosylphosphatidylinositols; 0/Peptides; 0/RNA, Messenger; 0/Receptors, Virus; 98849-88-8/FLAG peptide; EC 3.1.4.-/Type C Phospholipases; EC; EC Diacylglycerol-Lyase

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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