Sugar modified nucleosides and oligonucleotides

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United States of America Patent

PATENT NO 5681940
SERIAL NO

08333545

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A number of modified nucleosides are disclosed composed of modified sugar moieties which contain substituents at C1 and C4 positions, or branched substituents at C3 and C5 positions of deoxyribose or ribose. Each nucleoside is converted to or properly protected and then converted to the corresponding phosphoramidites. These phosphoramidites are used to assemble oligonucleotides in which there is at least one forenoted nucleosides. These sugar modified oligonucleotides have the potential to be used as antisense therapies since they are expected to enhance nuclease resistance and cellular uptake while they maintain sequence-specificity and affinity to nucleic acid targets in vitro or in vivo.

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Patent Owner(s)

Patent OwnerAddress
MDRNA INC3830 MONTE VILLA PARKWAY BOTHELL WA 98021

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ramasamy, Kandasamy Laguna Hills, CA 13 528
Seifert, Wilfried E La Jolla, CA 2 111
Wang, Guangyi Irvine, CA 90 3414

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