K
Koichi Hirata
Researcher at Sapporo Medical University
Publications - 735
Citations - 21379
Koichi Hirata is an academic researcher from Sapporo Medical University. The author has contributed to research in topics: Cancer & Breast cancer. The author has an hindex of 68, co-authored 717 publications receiving 18834 citations. Previous affiliations of Koichi Hirata include Showa University.
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Journal ArticleDOI
Gene-expression profiles of human tumor xenografts in nude mice treated orally with the EGFR tyrosine kinase inhibitor ZD1839.
Hitoshi Zembutsu,Yasuyuki Ohnishi,Yataro Daigo,Toyomasa Katagiri,Takefumi Kikuchi,Soji Kakiuchi,Chiyoko Nishime,Koichi Hirata,Yusuke Nakamura +8 more
TL;DR: The data obtained here should provide useful information on the molecular mechanism underlying clinical responses to EGFR-TKIs, aid the development of novel therapies for lung cancer, and potentially identify predictive molecular markers for sensitivity to ZD1839.
Journal ArticleDOI
Giant peritoneal loose body in the pelvic cavity: report of a case.
Hiroki Nomura,Fumitake Hata,Takahiro Yasoshima,Shinichi Kuwahara,Toru Naohara,Hidefumi Nishimori,Futoshi Nakajima,Y Yanai,Keisuke Ono,Koichi Hirata +9 more
TL;DR: A 63-year-old man who was asymptomatic underwent a routine medical examination, which revealed a tumor in the pelvic space, and a giant peritoneal loose body was found, made up of thick layers of fibrous tissue with a few cellular components, and necrotic fat tissue in the central position.
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ST6GALNAC1 plays important roles in enhancing cancer stem phenotypes of colorectal cancer via the Akt pathway.
Tadashi Ogawa,Yoshihiko Hirohashi,Aiko Murai,Toshihiko Nishidate,Kenji Okita,Liming Wang,Yuzuru Ikehara,Tetsuta Satoyoshi,Akihiro Usui,Terufumi Kubo,Munehide Nakastugawa,Takayuki Kanaseki,Tomohide Tsukahara,Goro Kutomi,Tomohisa Furuhata,Koichi Hirata,Noriyuki Sato,Toru Mizuguchi,Ichiro Takemasa,Toshihiko Torigoe +19 more
TL;DR: The results indicate that ST 6GALNAC1 has a role in the maintenance of CR-CSCs/CICs by activating the Akt pathway in cooperation with galectin-3 and that ST6GalNac1 (or STn antigen) might be a reasonable molecule for CSC/C IC-targeting therapy.
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Rheological properties of middle ear effusions from children with otitis media with effusion.
Yuichi Majima,Yasuo Sakakura,Takashi Matsubara,Yukiyoshi Hamaguchi,Koichi Hirata,Kazuhiko Takeuchi,Yasuro Miyoshi +6 more
TL;DR: Freshly harvested middle ear effusions were collected from children with otitis media with effusion and compared with transportability of the MEE on mucus-depleted frog palates to show there is a sharp increase in transport with increase in G′ up to 20 dyne/cm2, and at the higher value of G′there is a slow decrease in Transport with increasing G′.
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Cancer-associated oxidoreductase ERO1-α drives the production of VEGF via oxidative protein folding and regulating the mRNA level.
Tsutomu Tanaka,Tsutomu Tanaka,Goro Kutomi,Toshimitsu Kajiwara,Kazuharu Kukita,Vitaly Kochin,Takayuki Kanaseki,Tomohide Tsukahara,Yoshihiko Hirohashi,Toshihiko Torigoe,Yoshiharu Okamoto,Koichi Hirata,Noriyuki Sato,Yasuaki Tamura +13 more
TL;DR: A novel link between expression of ERO1-α and secretion of VEGF is established, providing new evidence for the effectiveness of E RO1- α-targeted therapy in patients with ERO 1-α-expressed cancer.