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Molecular Infectiology

Overview

 In our department, we intend to clarify the molecular mechanism of bacterial infection and its onset as well as biological defense and adjusting mechanisms and to apply them to the control and prophylaxis of various diseases associated with bacterial infection. At present, our department is characterized by extensive research into issues including pathological molecules produced by pathological bacteria (such as toxins), pathological changes in target cells attacked by them, and the consequent conditions of infected individuals, without inclining to a one-sided aspect of either pathogens or hosts. While our department has made a number of achievements by vigorously conducting cooperative studies with domestic and overseas universities and national research institutes, we are aggressively promoting cooperative studies with pharmaceutical-related companies and clinicians aiming to develop new technologies and drugs that apply the above knowledge to the prophylaxis and treatment of bacterial infections. With the recent emergence of new and reemerging infections, studies on pathological organisms, immunity against infection, infectious genetics, and genome-based drug discovery are again recognized as being important. However, there are only a few researchers in this field in Japan. Therefore, we consider the promotion of international research exchange activities in pathogenic microbiology and bacterial infectiology as well as the cultivation of excellent next-generation researchers, educators, and physicians as our important missions.

Associate Professor:
Takeshi Shimizu., Ph.D

TEL: +81-43-226-2048
FAX: +81-43-226-2049
e-mail: tshimizu●faculty.chiba-u.jp
URL: https://www.m.chiba-u.jp/dept/bacteriology/

※ Please change "●" mark to at-mark if you send emails.

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Research & Education

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  1. The study on the mode of action of Shiga toxin produced by EHEC
    --Molecular mechanism of toxin production and secretion
  2. The study on the mode of action of subtilase cytotoxin produced by Shiga toxin-producing E. coli
    --Molecular mechanism of cytotoxicity in vitro and in vivo
  3. The study on the mode of action of bacterial ADP-ribosylating toxins
  4. The study on the mode of action of new bacterial toxins
  5. The study on the inhibitor of new bacterial toxins
    --Effects of plant polyphenols on bacterial toxins
  6. The study on the detection system of new bacterial toxins

Recent Publications

  • Takeshi Shimizu; Manami Onuki; Shin Suzuki; Shinichiro Hirai; Eiji Yokoyama; Akio Matsumoto; Takashi Hamabata. 2021. Enhanced production of Shiga toxin 1 in enterohemorrhagic Escherichia coli by oxygen. Microbiology, 167:001122.
  • Takeshi Shimizu, Tohru Miyoshi-Akiyama, Kohei Ogura, Shota Murata, Shota Ishige, Kiyohiro Kai, Konosuke Mitsutsuka, Haruyoshi Tomita, Koichi Tanimoto, and Akio Matsumoto. 2020. Effect of sub-MICs of macrolides on the sensitivity of Pseudomonas aeruginosa to nitrosative stress: effectiveness against P. aeruginosa with and without multidrug resistance. Antimicrob. Agents Chemother., 64, e01180-20.
  • Takeshi Shimizu, Akio Matsumoto and Masatoshi Noda. 2019. Cooperative roles of NO-metabolizing enzymes to counteract nitrosative stress in enterohemorrhagic Escherichia coli. Infect. Immun., 87, e00334-19.
  • Kinnosuke Yahiro, Sayaka Nagasawa, Kimitoshi Ichimura, Hiroki Takeuchi, Kohei Ogura, Hiroyasu Tsutsuki, Takeshi Shimizu, Sunao Iyoda, Makoto Ohnishi, Hirotaro Iwase, Joel Moss & Masatoshi Noda. 2018. Mechanism of inhibition of Shiga-toxigenic Escherichia coli SubAB cytotoxicity by steroids and diacylglycerol analogues. Cell Death Discovery 4, 22