Modulation of immunostimulatory activity of CpG oligonucleotides by site-specific deletion of nucleobases |
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Authors: | Yu D Kandimalla E R Zhao Q Cong Y Agrawal S |
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Institution: | Hybridon, Inc., 345 Vassar Street, Cambridge, MA 02139, USA. |
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Abstract: | The effect of nucleobase deletion in the 3'- or the 5'-flanking sequence to a CpG-motif on immunostimulatory activity of CpG-containing oligonucleotides was examined by cell proliferation, secretion of IL-12 and IL-6 in mouse spleen cell cultures, and by spleen enlargement in mice. Deletion of one or two nucleobases in the 3'-flanking sequence to a CpG-motif at certain positions did not affect immunostimulatory activity, while similar deletions in the 5'-flanking sequence increased immunostimulatory activity compared with the parent oligo. |
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