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Koichi Takeya

Koichi Takeya

D-Index & Metrics

Chemistry

D-Index
65
Citations
13036
World Ranking
7781
National Ranking
518

Overview

Koichi Takeya is affiliated with the University of Tokyo in Japan. Their research primarily spans the fields of biochemistry, genetics, molecular biology, and medicine. Within these domains, Takeya has contributed to studies in molecular biology, pharmacology, biochemistry, plant science, and complementary and alternative medicine.

The scientist's work focuses on various topics related to natural compounds and their biological properties. Key research themes include the biological activity of diterpenoids and biflavonoids, synthesis of organic compounds, traditional and medicinal uses of Annonaceae plants, natural compound pharmacology studies, traditional Chinese medicine analysis, phytochemistry and biological activities, and natural product bioactivities and synthesis.

Takeya has authored publications in a range of scientific journals, with frequent appearances in:

  • Tetrahedron Letters
  • Bioorganic & Medicinal Chemistry Letters
  • Molecules
  • Heterocycles
  • Chemical and Pharmaceutical Bulletin

Recent published works by Takeya include:

  • "Structures of bicyclic hexapeptides RA-XXVII and RA-XXVIII from Rubia cordifolia L." (2024, Tetrahedron Letters)
  • "Garcinielliptone G from Garcinia subelliptica Induces Apoptosis in Acute Leukemia Cells" (2021, Molecules)
  • "Five New Highly Oxidized Neoclerodane Diterpenes, Salvileucalins E-I from Salvia leucantha" (2020, Heterocycles)
  • "Semisynthesis of Antitrypanosomal p-Quinone Analog Possesing the Komaroviquinone Pharmacophore" (2022, Chemical and Pharmaceutical Bulletin)
  • "Antitumor Agents. 282. 2'-(R)-O-Acetylglaucarubinone, a Quassinoid from Odyendyea gabonensis As a Potential Anti-Breast and Anti-Ovarian Cancer Agent" (2020, UNC Libraries)

Takeya frequently collaborates with several researchers, including Yukio Hitotsuyanagi, Yutaka Aoyagi, Reiko Yano, Haruhiko Fukaya, and Tomoyo Hasuda. The collaboration network indicates sustained partnerships within the field.

Best Publications

  • Structure–cytotoxic activity relationship for the toad poison bufadienolides

    Yoshiaki Kamano;Ayano Kotake;Hirofumi Hashima;Masuo Inoue

  • Studies on a Novel Anthraquinone and Its Glycosides isolated from Rubia cordifolia and R. akane

    Hideji Itokawa;Kazuhiko Mihara;Koichi Takeya

  • Antitumor principles from Ginkgo biloba L.

    Hider Itokawa;Nobuo Totsuka;Keisuke Nakahara;Koichi Takeya

  • Anthraquinones, Naphthohydroquinones and Naphthohydroquinone Dimers from Rubia cordifolia and Their Cytotoxic Activity

    Hideji Itokawa;Zedan Z. Ibraheim;Ya-Fang Qiao;Koichi Takeya

  • Isoflavanones from the heartwood of Swartzia polyphylla and their antibacterial activity against cariogenic bacteria.

    Kenji Osawa;Hideyuki Yasuda;Takashi Maruyama;Hiroshi Morita

  • Cytotoxic Quassinoids and Tirucallane-Type Triterpenes from the Woods of Eurycoma longifolia.

    Hideji Itokawa;Etsuko Kishi;Hiroshi Morita;Koichi Takeya

  • QSAR evaluation of the Ch'an Su and related bufadienolides against the colchicine-resistant primary liver carcinoma cell line PLC/PRF/5(1).

    Yoshiaki Kamano;Ayano Yamashita;Toshihiko Nogawa;Hiroshi Morita

  • Studies on the antitumor cyclic hexapeptides obtained from Rubiae radix.

    Hideji Itokawa;Koichi Takeya;Kazuhiko Mihara;Noboru Mori

  • Cytotoxic flavonoids from Vitex agnus-castus

    Chieko Hirobe;Zhi-Sheng Qiao;Koichi Takeya;Hideji Itokawa

  • Structural and conformational studies of [Ile7] and [Leu7]surfactins from Bacillus subtilis natto.

    Hideji Itokawa;Toshihiko Miyashita;Hiroshi Morita;Koichi Takeya

  • Cytotoxic aromatic triterpenes from Maytenus ilicifolia and Maytenus chuchuhuasca.

    O Shirota;H Morita;K Takeya;H Itokawa

  • Diarylheptanoids from the Rhizomes of Curcuma xanthorrhiza and Alpinia officinarum

    Shin-Ichi Uehara;Ichiro Yasuda;Kazuyuki Akiyama;Hiroshi Morita

  • Cytotoxic diterpenes from the rhizomes of Hedychium coronarium.

    H. Itokawa;H. Morita;I. Katou;K. Takeya

  • Studies on the Antitumor Bisabolane Sesquiterpenoids Isolated from Curcuma xanthorrhiza

    Hideji Itokawa;Fusayoshi Hirayama;Kazuko Funakoshi;Koichi Takeya

  • Cyclolinopeptides B - E, new cyclic peptides from Linum usitatissimum

    Hiroshi Morita;Akira Shishido;Teruki Matsumoto;Hideji Itokawa

  • Triterpenes fromMaytenus ilicifolia

    Hideji Itokawa;Osamu Shirota;Hiroshi Ikuta;Hiroshi Morita

  • Antitumour principles from Alpinia galanga.

    Hideji Itokawa;Hiroshi Morita;Takayoshi Sumitomo;Nobuo Totsuka

  • Squalene derivatives from Eurycoma longifolia

    Hiroshi Morita;Etsuko Kishi;Koichi Takeya;Hideji Itokawa

  • 4-Aza-2,3-dehydro-4-deoxypodophyllotoxins: simple aza-podophyllotoxin analogues possessing potent cytotoxicity.

    Yukio Hitotsuyanagi;Masamoto Fukuyo;Kyoko Tsuda;Masatsugu Kobayashi

  • Structures of Amides from Asiasarum heterotropoides MAEK. var. mandshuricum MAEK.

    Ichiro Yasuda;Koichi Takeya;Hideji Itokawa

Frequent Co-Authors

Hideji Itokawa
Hideji Itokawa University of Tokyo
Hiroshi Morita
Hiroshi Morita Hoshi University
Yoichi Iitaka
Yoichi Iitaka University of Tokyo
Khalijah Awang
Khalijah Awang University of Malaya
Yuji Matsumoto
Yuji Matsumoto Nara Institute of Science and Technology
Kentaro Yamaguchi
Kentaro Yamaguchi Tokushima Bunri University
George R. Pettit
George R. Pettit Arizona State University
Jun'ichi Kobayashi
Jun'ichi Kobayashi Hokkaido University
Hiroaki Saito
Hiroaki Saito University of Tokyo
David E. Minnikin
David E. Minnikin University of Birmingham

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