K
Keiji Ogura
Researcher at University of Tokyo
Publications - 99
Citations - 6199
Keiji Ogura is an academic researcher from University of Tokyo. The author has contributed to research in topics: Helicobacter pylori & Cancer. The author has an hindex of 42, co-authored 98 publications receiving 5922 citations. Previous affiliations of Keiji Ogura include Washington University in St. Louis.
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Journal ArticleDOI
Characteristic difference of hepatocellular carcinoma between hepatitis B‐ and C‐ viral infection in Japan
Yasushi Shiratori,Shuichiro Shiina,Masatoshi Imamura,Naoya Kato,Fumihiko Kanai,Takahito Okudaira,Takuivia Teratani,Gohichi Tohgo,Nobuo Toda,Makoto Ohashi,Keiji Ogura,Yasuro Niwa,Takao Kawabe,Masao Omata +13 more
TL;DR: HCC was found at early stage among the patients receiving periodic medical checkups beforehand, and the prognosis of these HCC patients was significantly better than those who did not receive checkups, which means periodical screening naturally improves prognosis.
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Outcomes of endoscopic submucosal dissection for colorectal epithelial neoplasms in 200 consecutive cases.
Mitsuhiro Fujishiro,Naohisa Yahagi,Naomi Kakushima,Shinya Kodashima,Yosuke Muraki,Satoshi Ono,Nobutake Yamamichi,Ayako Tateishi,Masashi Oka,Keiji Ogura,Takao Kawabe,Masao Ichinose,Masao Omata +12 more
TL;DR: ESD is applicable in the colorectum with promising results, however, when considering the risks and benefits, piecemeal endoscopic resection or coloreCTal resection might be more appropriate for some subgroups of large flat neoplasms or those with submucosal fibrosis.
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Endoscopic submucosal dissection of esophageal squamous cell neoplasms.
Mitsuhiro Fujishiro,Naohisa Yahagi,Naomi Kakushima,Shinya Kodashima,Yosuke Muraki,Satoshi Ono,Nobutake Yamamichi,Ayako Tateishi,Yasuhito Shimizu,Masashi Oka,Keiji Ogura,Takao Kawabe,Masao Ichinose,Masao Omata +13 more
TL;DR: The ESD is applicable to the esophagus with promising results, but notification of risk is essential.
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Virulence factors of Helicobacter pylori responsible for gastric diseases in Mongolian gerbil.
Keiji Ogura,Shin Maeda,Masafumi Nakao,Takeshi Watanabe,Mayumi Tada,Toshimasa Kyutoku,Haruhiko Yoshida,Yasushi Shiratori,Masao Omata +8 more
TL;DR: In this paper, the role of two genes, vacA and cagE, in the gastric pathogenesis induced by H. pylori using a long-term (62 wk) animal model was examined.
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Major virulence factors, VacA and CagA, are commonly positive in Helicobacter pylori isolates in Japan
Shin Maeda,Keiji Ogura,Hideo Yoshida,Fumihiko Kanai,Tsuneo Ikenoue,Naoya Kato,Yasushi Shiratori,Masao Omata +7 more
TL;DR: Most H pylori isolates in Japan are positive for vacuolating cytotoxin and CagA, and thus these virulence factors cannot be used as markers to discern the risk of developing serious gastroduodenal pathologies in the hosts.