Biologically active oligodeoxyribonucleotides. Part 11: The least phosphate-modification of quadruplex-forming hexadeoxyribonucleotide TGGGAG, bearing 3′- and 5′-end-modification, with anti-HIV-1 activity
Identifieur interne : 001298 ( Istex/Checkpoint ); précédent : 001297; suivant : 001299Biologically active oligodeoxyribonucleotides. Part 11: The least phosphate-modification of quadruplex-forming hexadeoxyribonucleotide TGGGAG, bearing 3′- and 5′-end-modification, with anti-HIV-1 activity
Auteurs : Makoto Koizumi [Japon] ; Rika Koga [Japon] ; Hitoshi Hotoda [Japon] ; Toshinori Ohmine [Japon] ; Hidehiko Furukawa [Japon] ; Toshinori Agatsuma [Japon] ; Takashi Nishigaki [Japon] ; Koji Abe [Japon] ; Toshiyuki Kosaka [Japon] ; Shinya Tsutsumi [Japon] ; Junko Sone [Japon] ; Masakatsu Kaneko [Japon] ; Satoshi Kimura [Japon] ; Kaoru Shimada [Japon]Source :
- Bioorganic & Medicinal Chemistry [ 0968-0896 ] ; 1998.
English descriptors
- Teeft :
Abstract
Abstract: We have found that a hexadeoxyribonucleotide (5′TGGGAG3′, R-95288), Koizumi, M. et al. Bioorganic & Medicinal Chemistry, 1997, 5, 2235, bearing a 3,4-dibenzyloxybenzyl (3,4-DBB) group at the 5′-end and a 2-hydroxyethylphosphate at the 3′-end, has high anti-HIV-1 activity and the least cytotoxicity in vitro and in vivo. In order to synthesize more potent hexadeoxyribonucleotides, we substituted phosphodiester (PO) bonds in the 6-mer with the least phosphorothioate (PS), phosphoramidate (PN), or methylphosphonate (PMe) bonds. When more than two PN or PMe bonds were introduced into a 6-mer, the phosphate-modified 6-mers had weak or no anti-HIV-1 activity, in spite of quadruplex structure formation. However, when PS bonds were substituted for PO bonds, anti-HIV-1 activity of their 6-mers did not dramatically decrease, compared with compounds substituted with PN or PMe bonds. The results suggest that the formation of a quadruplex structure is not always sufficient for anti-HIV-1 activity of the 6-mer, and that net negative charges derived from PO or PS bonds in the quadruplex are important for anti-HIV-1 activity. Moreover, among various phosphate-modified ODNs, we found that the anti-HIV-1 activity of ODN PS7 with only one PS bond was the same as that of R-95288, both having a high stability in human plasma.
Graphicgr1
Url:
DOI: 10.1016/S0968-0896(98)80021-7
Affiliations:
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<front><div type="abstract" xml:lang="en">Abstract: We have found that a hexadeoxyribonucleotide (5′TGGGAG3′, R-95288), Koizumi, M. et al. Bioorganic & Medicinal Chemistry, 1997, 5, 2235, bearing a 3,4-dibenzyloxybenzyl (3,4-DBB) group at the 5′-end and a 2-hydroxyethylphosphate at the 3′-end, has high anti-HIV-1 activity and the least cytotoxicity in vitro and in vivo. In order to synthesize more potent hexadeoxyribonucleotides, we substituted phosphodiester (PO) bonds in the 6-mer with the least phosphorothioate (PS), phosphoramidate (PN), or methylphosphonate (PMe) bonds. When more than two PN or PMe bonds were introduced into a 6-mer, the phosphate-modified 6-mers had weak or no anti-HIV-1 activity, in spite of quadruplex structure formation. However, when PS bonds were substituted for PO bonds, anti-HIV-1 activity of their 6-mers did not dramatically decrease, compared with compounds substituted with PN or PMe bonds. The results suggest that the formation of a quadruplex structure is not always sufficient for anti-HIV-1 activity of the 6-mer, and that net negative charges derived from PO or PS bonds in the quadruplex are important for anti-HIV-1 activity. Moreover, among various phosphate-modified ODNs, we found that the anti-HIV-1 activity of ODN PS7 with only one PS bond was the same as that of R-95288, both having a high stability in human plasma.</div>
<div type="abstract">Graphicgr1 </div>
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<name sortKey="Koizumi, Makoto" sort="Koizumi, Makoto" uniqKey="Koizumi M" first="Makoto" last="Koizumi">Makoto Koizumi</name>
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<name sortKey="Tsutsumi, Shinya" sort="Tsutsumi, Shinya" uniqKey="Tsutsumi S" first="Shinya" last="Tsutsumi">Shinya Tsutsumi</name>
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