Publications by authors named "Koichi Takeya"

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Synthesis of pisiferic acid analogues and their anti-adipogenic effect in 3T3-L1 adipocytes.
Ayako Oshika, Sayumi Ono, Haruka Iwano, Manami Toda, Risa Obayashi, Koichi Takeya

Bioorg Med Chem Lett· December 2025

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Synthesis of Antitumor Bicyclic Hexapeptide RA-VII Analogues Possessing an Aromatic Amino Acid at Residue 2.
Katsuaki Kitahara, Hatsumi Mizushima, Keiichiro Ogura, Motoki Kato, Haruhiko Fukaya, Koichi Takeya

J Org Chem· November 2024

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Kamebakaurin Suppresses Antigen-Induced Mast Cell Activation by Inhibition of FcεRI Signaling Pathway.
Haruka Asai, Koichi Kato, Mayu Miyasaka, Kaho Hatsukawa, Nanami Murakami, Koichi Takeya

Int Arch Allergy Immunol· September 2024

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Synthesis of 1-O-acyl- and 1-oxo-kamebanin analogues and their cytotoxic activity.
Yutaka Aoyagi, Kaori Tomita, Asumi Kobayashi, Akari Nakamura, Yuki Fujii, Koichi Takeya

Bioorg Med Chem Lett· February 2023

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Semisynthesis of Antitrypanosomal p-Quinone Analog Possesing the Komaroviquinone Pharmacophore.
Yutaka Aoyagi, Koji Fujiwara, Yoshinao Takahashi, Reiko Yano, Yukio Hitotsuyanagi, Koichi Takeya

Chem Pharm Bull (Tokyo)· April 2022

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Garcinielliptone G from Induces Apoptosis in Acute Leukemia Cells.
YoungSook Yun, Mariko Shioura, Yukio Hitotsuyanagi, Satoshi Yotsumoto, Yuji Takahashi, Koichi Takeya

Molecules· April 2021

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RA-XXV and RA-XXVI, Bicyclic Hexapeptides from Rubia cordifolia L.: Structure, Synthesis, and Conformation.
Yukio Hitotsuyanagi, Masahito Hirai, Masumi Odagiri, Miho Komine, Tomoyo Hasuda, Koichi Takeya

Chem Asian J· January 2019

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1O, 20O-diacetyl kamebakaurin protects against acetaminophen-induced hepatotoxicity in mice.
Hiroki Yoshioka, Tsunemasa Nonogaki, Hiroyuki Ohnishi, Nobuyuki Fukuishi, Masae Yoshikawa, Koichi Takeya

Biomed Res· December 2018

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Methyl dehydroabietate counters high fat diet-induced insulin resistance and hepatic steatosis by modulating peroxisome proliferator-activated receptor signaling in mice.
Hiroki Yoshioka, Yuki Mizuno, Tomohiro Yamaguchi, Yoshimi Ichimaru, Koichi Takeya

Biomed Pharmacother· March 2018

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Suppressive effect of kamebakaurin on acetaminophen-induced hepatotoxicity by inhibiting lipid peroxidation and inflammatory response in mice.
Hiroki Yoshioka, Yutaka Aoyagi, Nobuyuki Fukuishi, Ming-Yu Gui, Yong-Ri Jin, Koichi Takeya

Pharmacol Rep· October 2017

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RA-dimer B, a New Dimeric RA-series Cyclopeptide Incorporating Two Different Types of Cycloisodityrosine Units, from Rubia cordifolia L.
Yukio Hitotsuyanagi, Takayuki Tsuchiya, Masako Ohata, Ayaka Yoshida, Haruhiko Fukaya, Koichi Takeya

Chem Asian J· December 2016

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Absolute structures of stemona-lactam S and tuberostemospiroline, alkaloids from stemona tuberosa.
Haruhiko Fukaya, Yukio Hitotsuyanagi, Yutaka Aoyagi, Zhu Shu, Katsuko Komatsu, Koichi Takeya

Chem Pharm Bull (Tokyo)· May 2014

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The current status of tailor-made medicine with molecular biomarkers for patients with clear cell renal cell carcinoma.
Sunao Shoji, Mayura Nakano, Haruhiro Sato, Xian Yang Tang, Yoshiyuki Robert Osamura, Koichi Takeya

Clin Exp Metastasis· January 2014

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Semisynthesis of salviandulin E analogues and their antitrypanosomal activity.
Yutaka Aoyagi, Koji Fujiwara, Akira Yamazaki, Naoko Sugawara, Reiko Yano, Koichi Takeya

Bioorg Med Chem Lett· January 2014

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Aza-cycloisodityrosine analogue of RA-VII, an antitumor bicyclic hexapeptide.
Yukio Hitotsuyanagi, Akihiro Miyazawa, Taka-aki Hinosawa, Yoshie Nakagawa, Tomoyo Hasuda, Koichi Takeya

Bioorg Med Chem Lett· December 2013

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Conformational folding of mycobacterial methoxy- and ketomycolic acids facilitated by α-methyl trans-cyclopropane groups rather than cis-cyclopropane units.
Masumi Villeneuve, Mizuo Kawai, Kieko Horiuchi, Motoko Watanabe, Yutaka Aoyagi, Koichi Takeya

Microbiology (Reading)· November 2013

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Goniolandrene A and B from Goniothalamus macrophyllus.
Norkamilah Abdullah, Hamidah Sahibul-Anwar, Sharinah Ideris, Tomoyo Hasuda, Yukio Hitotsuyanagi, Koichi Takeya

Fitoterapia· July 2013

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Value of metastin receptor immunohistochemistry in predicting metastasis after radical nephrectomy for pT1 clear cell renal cell carcinoma.
Sunao Shoji, Mayura Nakano, Tetsuro Tomonaga, Hakushi Kim, Kazuya Hanai, Koichi Takeya

Clin Exp Metastasis· June 2013

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Abietane diterpenoids and a sesquiterpene pyridine alkaloid from Euonymus lutchuensis.
Yasunori Inaba, Tomoyo Hasuda, Yukio Hitotsuyanagi, Yutaka Aoyagi, Naoko Fujikawa, Koichi Takeya

J Nat Prod· June 2013

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Synthesis of [Tyr-5-Ψ(CH2NMe)-Tyr-6]RA-VII, a reduced peptide bond analogue of RA-VII, an antitumor bicyclic hexapeptide.
Tomoyo Hasuda, Yukio Hitotsuyanagi, Mitsuyuki Shinada, Koichi Takeya

Bioorg Med Chem Lett· April 2012

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Isolation, structure determination, and synthesis of allo-RA-V and neo-RA-V, RA-series bicyclic peptides from Rubia cordifolia L.
Yukio Hitotsuyanagi, Masumi Odagiri, Saori Kato, Jun-ichi Kusano, Tomoyo Hasuda, Koichi Takeya

Chemistry· March 2012

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Monoclonal antibodies from Rubia cordifolia against antitumor cyclohexapeptide deoxybouvardin and their use in immunoassay.
Tomoyo Hasuda, Yukio Hitotsuyanagi, Koichi Takeya

Hybridoma (Larchmt)· February 2012

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Cyclization vs. cyclization/dimerization in o-amidostilbene radical cation cascade reactions: the amide question.
Chin Hui Kee, Azhar Ariffin, Khalijah Awang, Ibrahim Noorbatcha, Koichi Takeya

Molecules· August 2011

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Semisynthesis of triptolide analogues: effect of γ-lactone and C-14 substituents on cytotoxic activities.
Yutaka Aoyagi, Yukio Hitotsuyanagi, Tomoyo Hasuda, Haruhiko Fukaya, Koichi Takeya

Bioorg Med Chem Lett· May 2011

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Synthesis of rabdokunmin C analogues and their inhibitory effect on NF-κB activation.
Yutaka Aoyagi, Yoshiyuki Adachi, Kei Ozawa, Chihiro Yokomizo, Ming-Yu Gui, Koichi Takeya

Bioorg Med Chem· April 2011

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