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Journal of Virology, December 1998, p. 9514-9525, Vol. 72, No. 12
CNRS UMR1582/Rhône Poulenc
Gencell/IGR1 and
Service
d'Expérimentation Animale,
Received 23 February 1998/Accepted 20 August 1998
The efficiency of adenovirus-mediated gene transfer is now well
established. However, the cellular and the humoral immune responses
triggered by vector injection lead to the rapid elimination of the
transduced cells and preclude any efficient readministration. The
present investigation focuses on the role of tumor necrosis factor
alpha (TNF-
0022-538X/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
Efficient, Repeated Adenovirus-Mediated Gene Transfer in Mice
Lacking both Tumor Necrosis Factor Alpha and Lymphotoxin
), a proinflammatory cytokine, and the related cytokine
lymphotoxin
(LT
), in mounting an immune reaction against recombinant adenovirus vectors. After gene transfer in the liver, mice
genetically deficient for both cytokines
(TNF-
/LT
/
), in comparison with normal mice,
presented a weak acute-phase inflammatory reaction, a reduction in
cellular infiltrates in the liver, and a severely impaired T-cell
proliferative response to both Adenoviral and transgene product
antigens. Moreover, we observed a strong reduction in the humoral
response to the vector and the transgene product, with a drastic
reduction of anti-adenovirus immunoglobulin A and G antibody isotypes.
In addition, the reduction in antibody response observed in
TNF-
/LT
/
and TNF-
/LT
+/
mice
versus TNF-
/LT
+/+ mice links antibody levels to
TNF-
/LT
gene dosage. Due to the absence of neutralizing
antibodies, the TNF-
/LT
knockout mice successfully express a
second gene transduced by a second vector injection. The discovery of
the pivotal role played by TNF-
in controlling the antibody response
against adenovirus will allow more efficient adenovirus-based
strategies for gene therapy to be proposed.
*
Corresponding author. Mailing address: Laboratoire de
Vectorologie et Transfert de Gènes, UMR1582 CNRS/Rhône
Poulenc Gencell/IGR, Institut Gustave Roussy PR2, 39 rue Camille
Desmoulins, 94805 Villejuif Cedex, France. Phone: (33) 1 42 11 50 82. Fax: (33) 1 42 11 52 45. E-mail: benihoud{at}igr.fr.
Journal of Virology, December 1998, p. 9514-9525, Vol. 72, No. 12
0022-538X/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
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