Synthesis of ENA nucleotides and ENA oligonucleotides

K Morita, M Koizumi - Current Protocols in Nucleic Acid …, 2018 - Wiley Online Library
O, 4′‐C‐Ethylene‐bridged nucleic acid (ENA) is a sugar‐modified oligonucleotide with an
ethylene bridge between the 2′‐oxygen and 4′‐carbon of ribose. ENA not only has as …

2′-O, 4′-C-Ethylene-bridged nucleic acids (ENATM) as next-generation antisense and antigene agents

M Koizumi - Biological and Pharmaceutical Bulletin, 2004 - jstage.jst.go.jp
Novel 2-O, 4-C-ethylene nucleosides have been synthesized as building blocks for
antisense and antigene oligonucleotides. 2-O, 4-C-Ethylene-bridged nucleic acids (ENATM) …

Synthesis and properties of 2′-O, 4′-C-ethylene-bridged nucleic acids (ENA) as effective antisense oligonucleotides

K Morita, M Takagi, C Hasegawa, M Kaneko… - Bioorganic & medicinal …, 2003 - Elsevier
Novel bicyclo nucleosides, 2′-O, 4′-C-ethylene nucleosides and 2′-O, 4′-C-propylene
nucleosides, were synthesized as building blocks for antisense oligonucleotides to further …

2′-O, 4′-C-ethylene-bridged nucleic acids (ENA): highly nuclease-resistant and thermodynamically stable oligonucleotides for antisense drug

K Morita, C Hasegawa, M Kaneko, S Tsutsumi… - Bioorganic & Medicinal …, 2002 - Elsevier
To develop antisense oligonucleotides, novel nucleosides, 2′-O, 4′-C-ethylene
nucleosides and their corresponding phosphoramidites, were synthesized as building …

An improved synthesis of 2′-O,4′-C-ethylene nucleic acid (ENA) and thermodynamic studies of duplex formation containing the guanosine ENA unit

M Takagi-Sato, K Morita, Y Onishi… - … Nucleotides & Nucleic …, 2020 - Taylor & Francis
Abstract Oligonucleotides containing 2′-O, 4′-C-ethylene nucleic acids (ENA) have been
proven highly effective for antisense therapeutics. 2′-O, 4′-C-Ethyleneguanosine and its …

2′-O, 4′-C-Ethylene-bridged nucleic acids (ENA) with nuclease-resistance and high affnity for RNA

K Morita, C Hasegawa, M Kaneko… - Nucleic acids …, 2001 - academic.oup.com
Abstract Novel nucleosides, 2′-O, 4′-C-ethylene nucleosides and their corresponding
phosphoramidites, were synthesized as building blocks for antisense oligonucleotides. The …

Fine-Tuning of ENA® Gapmers as Antisense Oligonucleotides for Sequence-Specific Inhibition

M Takagi-Sato, S Tokuhiro, R Kawaida… - …, 2007 - liebertpub.com
For gene validation and the development of oligonucleotide agents, 2′-O, 4′-C-ethylene-
bridged nucleic acid (ENA) antisense gapmers are widely available. An in vitro Escherichia …

Down-regulation of VEGF mRNA expression by 2′-O,4′-C-ethylene-bridged nucleic acid (ENA) antisense oligonucleotides and investigation of non-target gene …

K Morita, K Yamate, S Kurakata, K Abe… - Nucleic Acids …, 2002 - academic.oup.com
We studied the properties of 2′-O, 4′-C-ethylene-bridged nucleic acid (ENA)
oligonucleotides as antisense molecules. Compared to a phosphorothioate (PS) DNA and …

Synthesis and Properties of Oligonucleotides Containing 2′‐O,4′‐C‐Ethylene‐Bridged 5‐Methyluridine with Exocyclic Methylene and Methyl Groups in the Bridge

Y Ito, K Nishida, N Tsutsui, Y Fuchi… - European Journal of …, 2021 - Wiley Online Library
Abstract Novel 2′‐O, 4′‐C‐ethylene‐bridged nucleic acid (ENA) analogs with exocyclic
methylene and (R)‐methyl groups at the 6′‐position were synthesized. The obtained 6 …

Synthesis and properties of fully-modified 4′-selenoRNA, an endonuclease-resistant RNA analog

M Ota, H Takahashi, Y Nogi, Y Kagotani… - Bioorganic & Medicinal …, 2022 - Elsevier
A large number of chemically modified oligonucleotides (ONs) have been developed for
RNA-based technologies. In most modified RNAs, the characteristic 2′-hydroxyl (2′-OH) …