論文 - 川上 純司
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Kaoru Karasawa, Eva Duchoslav, Lyle Burton, Junji Kawakami, Takashi Baba
Analytical Chemistry 95 ( 44 ) 16352 - 16358 2023年10月
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Mitochondrial Dynamics of Bcl-2 Family Proteins during 17-β-Estradiol-Induced Apoptosis Correlate with the Malignancy of Endometrial Cancer Cells 査読あり
Takahiro Yaguchi, Misaki Kameno, Hirofumi Taira, and Junji Kawakami
Biochemstry 62 ( 21 ) 3041 - 3049 2023年10月
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複数種の液体クロマトグラフ質量分析計を用いたモデル核酸医薬品の分析データの比較 査読あり
Kenji Hirose, Tokuyuki Yoshida, Maki Terasaki, Hiroshi Sezaki, Kaoru Karasawa, Noriyuki Iwasaki, Kentaro Takahara, Naomi Takiguchi, Mitsuaki Sekiguchi, Hirokazu Nankai, Emi Saito, Hideaki Sato, Takashi Osawa, Takao Yamaguchi, Kosuke Ito, Junji Kawakami, Satoshi Obika, and Takao Inoue
54 439 - 454 2023年10月
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Not all 2',4'-bridged modifications stabilize DNA/RNA duplexes 査読あり
Tomoka Akita, Elisa Tomita-Sudo, Shin Itoh, Nae Sakimoto, Takeshi Masuda, Akifumi Nakamura, Yoshiyuki Onishi, Makoto Koizumi Junji Kawakami
Nucleosides, Nucleotides & Nucleic Acids 2023年3月
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Toshiyuki Goto, Shuhei Torii, Aoi Kondo, Kazumasa Kanda, Junji Kawakami, Yosky Kataoka, Takahito Nishikata
Journal of Developmental Biology 10 ( 1 ) 10 - 10 2022年2月
出版者・発行元:MDPI AG
In many animal species, the body axis is determined by the relocalization of maternal determinants, organelles, or unique cell populations in a cytoskeleton-dependent manner. In the ascidian first cell cycle, the myoplasm, including mitochondria, endoplasmic reticulum (ER), and maternal mRNAs, move to the future posterior side concomitantly (called ooplasmic segregation or cytoplasmic and cortical reorganization). This translocation consists of first and second phases depending on the actin and microtubule, respectively. However, the transition from first to second phase, that is, translocation of myoplasmic components from microfilaments to microtubules, has been poorly investigated. In this study, we analyzed the relationship between these cytoskeletons and myoplasmic components during the first cell cycle and their role in morphogenesis by inhibitor experiments. Owing to our improved visualization techniques, there was unexpected F-actin accumulation at the vegetal pole during this transition period. When this F-actin was depolymerized, the microtubule structure was strongly affected, the myoplasmic components, including maternal mRNA, were mislocalized, and the anteroposterior axis formation was disordered. These results suggested the importance of F-actin during the first cell cycle and the existence of interactions between microfilaments and microtubules, implying the enigmatic mechanism of ooplasmic segregation. Solving this mystery leads us to an improved understanding of ascidian early development.
DOI: 10.3390/jdb10010010
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Miho Takagi-Sato, Koji Morita, Yoshiyuki Onishi, Yuuka Watahiki, Taku Ishigaki, Tomoka Akita, Erisa Tomita, Junji Kawakami, Makoto Koizumi
Nucleosides, Nucleotides & Nucleic Acids 39 ( 6 ) 838 - 852 2020年6月
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好熱性細菌および酵母菌による多段階培養発酵技術から得られた 発酵エキスの皮膚に対する有用性 査読あり
川野 大地, 廖 筝筝, 聶 菁, 伊達 朗, Eduardo Perez, Jose Fernandez, Corey Webb, Kristen Huber, Jeffry B. Stock, 川上 純司, 付 子華
日本香粧品学会誌 44 ( 3 ) 194 - 202 2020年
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Different reactivity of Sp and Rp isomers of phosphorothioate-modified oligonucleotides in a duplex structure 査読あり
Md Ariful Islam, Aki Fujisaka, Junji Kawakami, Takao Yamaguchi, Satoshi Obika
Bioorg. Med. Chem. Lett. 30 ( 14 ) 127166 - 127166 2020年
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Enhancement of exon skipping activity by reduction in the secondary structure content of LNA-based splice-switching oligonucleotides 査読あり
T. Shimo, K. Tachibana, Y. Kawawaki, Y. Watahiki, T. Ishigaki, Y. Nakatsuji, T. Hara, J. Kawakami and S. Obika
Chem. Commun. 55 6850 - 6853 2019年4月
共著
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Influence of intracellular environment on allosteric ribozyme activity
Misaki Kameno, Mika Sawada, Nae Sakimoto and Junji Kawakami
Proc. 44th Intl. Symp. Nucleic Acid Chemistry 178 - 179 2017年11月
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担当区分:筆頭著者
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Quantification of stabilization effect of co-solutes on RNA tertiary interaction
Natsumi Sasaki, Daisuke Miyoshi and Junji Kawakami
Proc. 44th Intl. Symp. Nucleic Acid Chemistry 174 - 175 2017年11月
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担当区分:筆頭著者
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Quantitative relationship between chemical properties and bioactivities of anti-microRNA oligonucleotides targeted to tumor-associated microRNA-21 査読あり
Koji Nagahama, Kenta Iseda, Daichi Kawano, Junji Kawakami
BIOCHIMIE 137 124 - 131 2017年6月
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担当区分:最終著者, 責任著者 出版者・発行元:ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
Synthetic anti-microRNA oligonucleotides (AMOs) are promising drug candidates to inactivate disease related microRNAs because of their sequence-specific binding to their targets and the variety of chemical modifications available. Over the last decade, the qualitative relationships between the chemical properties of AMOs and bioactivity (inactivation of their target miRNAs) have been studied to enhance their bioactivity. On the other hand, in real-world drug development, drugs must be designed case-by case, taking many factors into account. Thus, in order to design AMOs that target specific miRNA, understanding the quantitative relationship between the chemical properties of AMOs and inactivation of their target miRNA is necessary. Here, we aimed to find the specific quantitative relationship of AMOs targeted to tumor-associated miR-21 through direct comparison of their inactivation efficacies with systematically varied chemical properties, including sequence-specific binding affinity, nuclease resistance, and RNase H activation. As a result, we newly found the quantitative relationships; (1) sequence specific binding affinity of AMOs against miR-21 is the main determining factor for inactivation efficacy, (2) nuclease resistance of AMOs impacts their miR-21 inactivation efficacy acting cooperatively with the binding affinity, although nuclease resistance alone does not affect the miRNA inactivation efficacy, and (3) RNase H activation is unnecessary. This study also demonstrates the utility of the obtained relationship for the design of AMO-based drugs targeted to miR-21, through cell-based analyses. Thus, the obtained quantitative relationship would make it possible to predict the miR-21 inactivation efficacy of AMOs which are newly designed. (C) 2017 Elsevier B.V. and Societe Francaise de Biochimie et Biologie Moleculaire (SFBBM). All rights reserved.
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Quantitative relationship between chemical properties and bioactivities of anti-microRNA oligonucleotides targeted to tumor-associated microRNA-21 査読あり
Koji Nagahama, Kenta Iseda, Daichi Kawano, Junji Kawakami
Biochimie 137 124 - 131 2017年3月
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担当区分:筆頭著者
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Influence of intracellular environment on allosteric ribozyme activity
M. Kameno, M. Sawada, N. Sakimoto, J. Kawakami
Proc. 44th Intl. Symp. Nucleic Acid Chemistry 178 - 179 2017年
共著
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Quantification of stabilization effect of co-solutes on RNA tertiary interaction
N. Sasaki, D. Miyoshi, J. Kawakami
Proc. 44th Intl. Symp. Nucleic Acid Chemistry 174 - 175 2017年
共著
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Characterization of functional RNA to perform self-cleavage reaction under low pH condition
N. Sakimoto, M. Kameno, N. Sasaki, J. Kawakami
Proc. 43rd Intl. Symp. Nucleic Acid Chemistry 284 - 285 2016年9月
共著
担当区分:筆頭著者
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Discovery of a new function of curcumin which enhances its anticancer therapeutic potency 査読あり
Koji Nagahama, Tomoya Utsumi, Takayuki Kumano, Saeko Maekawa, Naho Oyama, Junji Kawakami
Scientific Reports 6 30962 2016年8月
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DOI: 10.1038/srep30962
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Characterization of functional RNA to perform self-cleavage reaction under low pH condition
N. Sakimoto, M. Kameno, N. Sasaki, J. Kawakami
Proc. 43rd Intl. Symp. Nucleic Acid Chemistry 284 - 285 2016年
共著
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Discovery of a new function of curcumin which enhances its anticancer therapeutic potency
K. Nagahama, T. Utsumi, T. Kumano, S. Maekawa, N. Oyama, J. Kawakami
Scientific Reports 6 30962 2016年
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Self-Assembling Polymer Micelle/Clay Nanodisk/Doxorubicin Hybrid Injectable Gels for Safe and Efficient Focal Treatment of Cancer 査読あり
Koji Nagahama, Daichi Kawano, Naho Oyama, Ayaka Takemoto, Takayuki Kumano, Junji Kawakami
BIOMACROMOLECULES 16 ( 3 ) 880 - 889 2015年3月
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出版者・発行元:AMER CHEMICAL SOC
The purpose of this study was to fabricate a safe and effective doxorubicin (DOX)-delivery system for focal cancer chemotherapy. A novel biodegradable injectable gel was developed through self-assembly of poly(D,L-lactide-co-glycolide)-b-poly(ethylene glycol)-b-poly(D,L-lactide-co-glycolide) (PLGA-PEG-PLGA) copolymer micelles, clay nanodisks (CNDs), and DOX. We discovered that DOX loaded in the hybrid gels acts as an anticancer drug and as a building block to organize new gel networks. Accordingly, long-term sustained release of DOX from hybrid injectable gels without initial burst release was achieved. Moreover, it was revealed that the DOX incorporated into gel networks controls its own release profile. This hybrid injectable gel is a self-controlled drug release system, which is a novel concept in controlled drug release. Importantly, a single injection of PLGA-PEG-PLGA/CND/DOX hybrid gel provides long-term sustained antitumor activity in vivo against human xenograft tumors in mice, suggesting the potential of hybrid gels as a valuable local DOX-delivery platform for cancer focal therapy.
DOI: 10.1021/bm5017805