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Blood, 1 April 2007, Vol. 109, No. 7, pp. 2982-2984. Prepublished online as a Blood First Edition Paper on December 5, 2006; DOI 10.1182/blood-2006-06-022178.
Submitted June 12, 2006
Institute for Virology, University of Duisburg-Essen, Essen, Germany * Corresponding author; email: ulf.dittmer{at}uni-essen.de.
Adoptive T-cell therapy in cancer or chronic viral infections is often impeded by the development of functional impairment of the transferred cells. To overcome this therapeutic limitation we combined adoptive transfer of naive, virus-specific CD8+ T-cell with immunostimulative CpG oligodeoxynucleotides (ODN) in mice chronically infected with Friend retrovirus. The CpG-ODN co-injection prevented the T-cells from developing functional defects in IFNgamma and granzyme production and degranulation of cytotoxic molecules. Thus, the transferred T-cells were able to reduce chronic viral loads when combined with CpG-ODN. This strategy provides a new approach for developing successful adoptive T-cell therapy against chronic infections.
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