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Journal of Virology, September 2001, p. 8864-8867, Vol. 75, No. 18
Division of Human Biology, Fred Hutchinson
Cancer Research Center, Seattle, Washington 98109
Received 22 March 2001/Accepted 19 June 2001
Jaagsiekte sheep retrovirus (JSRV) replicates in the lungs of sheep
and causes the secretion of copious lung fluid containing the virus.
Adaptation of JSRV to infection and replication in the lung and its
apparent resistance to the denaturing activity of lung fluid suggest
that vectors based on JSRV would be useful for gene therapy targeted to
the lung. We show here that a retrovirus vector bearing the JSRV Env is
stable during treatment with lung surfactant while an otherwise
identical vector bearing an amphotropic Env is inactivated.
Furthermore, the JSRV vector was stable during centrifugation, allowing
facile vector concentration, and showed no loss of activity after six
freeze-thaw cycles. However, the JSRV vector was inactivated by
standard disinfectants, indicating that JSRV vectors pose no unusual
safety risk related to their improved stability under other conditions.
0022-538X/01/$04.00+0 DOI: 10.1128/JVI.75.18.8864-8867.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Jaagsiekte Sheep Retrovirus Env Protein Stabilizes Retrovirus
Vectors against Inactivation by Lung Surfactant, Centrifugation,
and Freeze-Thaw Cycling
*
Corresponding author. Mailing address: Fred Hutchinson
Cancer Research Center, 1100 Fairview Ave. N., Room C2-105, Seattle, WA
98109-1024. Phone: (206) 667-2890. Fax: (206) 667-6523. E-mail: dmiller{at}fhcrc.org.
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