Disulfide‐Unit Conjugation Enables Ultrafast Cytosolic Internalization of Antisense DNA and siRNA

…, S Kawaguchi, K Nakamoto, F Tomoike… - Angewandte …, 2019 - Wiley Online Library
Abstract Development of intracellular delivery methods for antisense DNA and siRNA is
important. Previously reported methods using liposomes or receptor‐ligands take several hours …

Phosphorothioate modification of mRNA accelerates the rate of translation initiation to provide more efficient protein synthesis

…, K Takebuchi, F Hashiya, F Tomoike… - Angewandte Chemie …, 2020 - Wiley Online Library
Messenger RNAs (mRNAs) with phosphorothioate modification (PS‐mRNA) to the phosphate
site of A, G, C, and U with all 16 possible combinations were prepared, and the translation …

A covalent G-site inhibitor for glutathione S-transferase Pi (GSTP 1-1)

Y Shishido, F Tomoike, Y Kimura, K Kuwata… - Chemical …, 2017 - pubs.rsc.org
We herein report the first covalent G-site-binding inhibitor for GST, GS-ESF (1), which
irreversibly inhibited the GSTP1-1 function. LC-MS/MS and X-ray structure analyses of the …

A Covalent Inhibitor for Glutathione S‐Transferase Pi (GSTP1‐1) in Human Cells

Y Shishido, F Tomoike, K Kuwata, H Fujikawa… - …, 2019 - Wiley Online Library
Glutathione S‐transferase π (GSTP 1‐1 ) is overexpressed in many types of cancer and is
involved in drug resistance. Therefore, GSTP 1‐1 is an important target in cancer therapy, and …

Intracellular build-up RNAi with single-strand circular RNAs as siRNA precursors

…, Z Shu, M Ito, N Abe, K Nakamoto, F Tomoike… - Chemical …, 2020 - pubs.rsc.org
We herein report a new approach for RNA interference, so-called “build-up RNAi” approach,
where single-strand circular RNAs with a photocleavable unit or disulfide moiety were used …

Chemically synthesized circular RNAs with phosphoramidate linkages enable rolling circle translation

…, N Abe, G Tsuji, Y Kimura, F Tomoike… - Chemical …, 2020 - pubs.rsc.org
Circular RNA without a stop codon enables rolling circle translation. To produce circular
RNAs, we carried out one-pot chemical synthesis of circular RNA from RNA fragments with the …

RNA imaging by chemical probes

F Tomoike, H Abe - Advanced Drug Delivery Reviews, 2019 - Elsevier
Sequence-specific detection of intracellular RNA is one of the most important approaches to
understand life phenomena. However, it is difficult to detect RNA in living cells because of …

N6-methyl adenosine in siRNA evades immune response without reducing RNAi activity

A Imaeda, F Tomoike, M Hayakawa… - … and Nucleic Acids, 2019 - Taylor & Francis
siRNA is a powerful method to suppress specific gene expression and has recently been
utilized for molecular biology as well as medicine. However, introduction of dsRNA stimulates …

A Single Amino Acid Limits the Substrate Specificity of Thermus thermophilus Uridine-Cytidine Kinase to Cytidine

F Tomoike, N Nakagawa, S Kuramitsu, R Masui - Biochemistry, 2011 - ACS Publications
The salvage pathways of nucleotide biosynthesis are more diverse and are less well
understood as compared with de novo pathways. Uridine-cytidine kinase (UCK) is the rate-limiting …

Repetitive formation of optically-observable planar lipid bilayers by rotating chambers on a microaperture

F Tomoike, T Tonooka, T Osaki, S Takeuchi - Lab on a Chip, 2016 - pubs.rsc.org
Optical observation of a planar lipid bilayer is an effective method of lipid bilayer
characterization. However, previous methods for optically observable lipid bilayer formation are …