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International Affairs Students Current Students Alumni Faculty/Staff Careers--> TOHOKU UNIVERSITYCREATING GLOBAL EXCELLENCE Search 日本語 Contact Tohoku University --> About Facts & Figures Facilities Organization Chart History President's Message Top Global University Project Designated National University Global Network Promotional Videos Academics Undergraduate Graduate Courses in English Exchange Programs Summer Programs Double Degree Programs Academic Calendar Syllabus Admissions Undergraduate Admissions Graduate Admissions Fees and Expenses Financial Aid Research Feature Highlights Research Releases University Research News Research Institutes Visitor Research Center Research Profiles Academic Research Staff Campus Life International Support Office IT Services Facilities Dining & Shops Campus Bus Clubs & Circles News University News Research--> Arts & Culture Health & Sports Campus & Community Press Release--> International Visit Alumni Careers Events Exhibits Music Special Event Lecture Alumni--> Map & Directions Campus Maps & Bus--> Facilities Map--> TOHOKUUNIVERSITY About Academics Admissions Research Campus Life News Events International Affairs Students Current Students Alumni Faculty/Staff Promotional Videos Subscribe to our Newsletter Map & Directions Contact Jobs & Vacancies Emergency Information Site Map 日本語 Close Home Research News Simplifying the Way Cell Proliferation is Monitored in Mice Research News Simplifying the Way Cell Proliferation is Monitored in Mice 2023-12-14 Observing cell proliferation in living animals for a long period requires collecting and analyzing animal organs at multiple points in time. This cumbersome process requires an abundance of resources, including animals. Now, a research group has developed a genetically modified mouse where the proliferation of intended cells in the body can be monitored over time, and with high sensitivity. This simple and cost-effective monitoring method requires only a small amount of blood to be drawn. "Our genetically modified mouse produces a protein called luciferase and releases it into the blood," points out Associate Professor Junta Imai from the Department of Metabolism and Diabetes within Tohoku University's Graduate School of Medicine. "Luciferase is released into the bloodstream when the targeted cells undergo proliferation and we could collect small blood samples from the mice to measure luciferase levels, enabling real-time detection of cell proliferation within the body." Successful generation of mice in which the intended cell proliferation can be monitored by measuring the amount of luciferase secreted into the blood. ©Junta Imai et al. This innovative method can also be genetically modified to observe the proliferation of various types of intended cells. First, Imai and his colleagues, including Assistant Professor Hiroto Sugawara and Professor Hideki Katagiri of the Tohoku University Graduate School of Medicine, subjected the mice to monitoring for the proliferation of liver cells. When the liver is partially removed, the remaining liver cells reportedly proliferate. Therefore, blood samples were taken from the mice after partial removal of the liver and further monitored for proliferation of liver cells. This approach allows changes in liver cell proliferation to be monitored with very high sensitivity. Successful continuous monitoring of changes in liver cell proliferation after partial liver removal in mice by collecting very small blood samples. ©Junta Imai et al. Next, the research group monitored the proliferation of pancreatic β cells, insulin-producing cells that occupy the body in very small numbers. The group's previous study showed that neural signals cause β-cell proliferation. Putting this into practice, the group stimulated β-cell proliferation in the mice with neural signals and then observed over time. Changes in β-cell proliferation were thereby monitored with high sensitivity. These results indicate that the method can detect the proliferation of even small cell populations. Furthermore, cells from these mice were found to potentially be applicable in the search for agents that increase cell proliferation. "These methods are highly anticipated to facilitate the development of treatments for many diseases, such as curative agents for diabetes that increase insulin-producing cells and drugs that inhibit the growth of cancer cells, while making optimally effective use of limited experimental resources," adds Imai. The study was published in the international journal Nature Communications and was supported by the Japan Science and Technology Agency, JST, [Moonshot R&D] as well as by the Japan Agency for Medical Research and Development, AMED (AMED-PRIME). A) Successful continuous monitoring of changes in pancreatic β cell proliferation induced by nerve stimulation in mice by collecting very small blood samples. (B) Beta-cell proliferation detected by the newly-developed method correlates strongly with β-cell proliferation detected by conventional methods using pancreatic specimens. ©Junta Imai et al. Publication Details: Title: A highly sensitive strategy for monitoring real-time proliferation of targeted cell types in vivoAuthors: Hiroto Sugawara, Junta Imai, Junpei Yamamoto, Tomohito Izumi, Yohei Kawana, Akira Endo, Masato Kohata, Junro Seike, Haremaru Kubo, Hiroshi Komamura, Yuichiro Munakata, Yoichiro Asai, Shinichiro Hosaka, Shojiro Sawada, Shinjiro Kodama, Kei Takahashi, Keizo Kaneko, and Hideki KatagiriJournal: Nature CommunicationsDOI: 10.1038/s41467-023-38897-5 Press release in Japanese Contact: Junta Imai, Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine Email: imaimed.tohoku.ac.jpWebsite: http://www.diabetes.med.tohoku.ac.jp/ --> Archives 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 Page Top About Tohoku University Academics Admissions Research Campus Life News Events International Affairs Students Alumni Promotional Videos Subscribe to our Newsletter Map & Directions Contact Tohoku University Jobs & Vacancies Emergency Information Site Map Privacy Policy Media Enquiries Parent & Family Support Public Facilities Contact Tohoku University