RIKEN Center for Life Science Technologies


  • Research

    Latest publications from CLST.
  • News

    Awards, agreements, and other news.
  • Events

    Upcoming and past events including seminars, symposiums, open days.

For Public

To let you know about our research, this area contains 4 types of information about CLST; “Article”, “Videos”, “Event” and “Study”.
At “Article”, you can read articles on interviews and lectures, and you can enjoy the videos about CLST at “Videos”. If you want to meet and talk directly with the researcher, “Visit” give you some information of such events. You can find more difficult contents to know about our research deeply at “Study”.
  • Article
  • Event
  • Videos
  • Study


Development of Novel PET probe for detecting bone metastatic tumor with thymidine analogs

Cancer spreads to the everywhere in whole body along with time, which makes it difficult to fundamental treatment. Therefore, the early detection, diagnosis and treatment of cancer are strongly demanded. Abnormally high proliferative activity is a prominent feature of tumor cells, therefore, its non-invasive measurements using several thymidine analogs labeled with positron-emitting nuclei, such as 11C and 18F by positron emission tomography (PET) are thought to be useful for the early detection of cancer in human.

We have tried to evaluate whether that 11C-labeled AZT and d4T, which are known as thymidine analogs and anti-HIV drugs, are useful for PET tumor imaging and we found that the [11C]AZT were remarkably accumulated in tumor. Interestingly, we also observed that [11C]AZT showed low accumulation in the normal proliferative tissues, such as bone and intestine. Since most of thymidine analog PET probes are known to accumulate in normal proliferative tissue, [11C]AZT could be useful to detect not only the bone tumor but also bone metastasis. We look forward to the clinical application of [11C]AZT.

Figure 2

Article Information:
Tahara T, Zhang Z, Ohno M, Hirao Y, Hosaka N, Doi H, Suzuki M, Onoe H.
“A novel 11C-labeled thymidine analog, [11C]AZT, for tumor imaging by positron emission tomography”
EJNMMI Research 2015, 5:45. doi: 10.1186/s13550-015-0124-0. Epub 2015 Sep 4.

Related labs

CLST was reorganized into three centers according to the RIKEN 4th Medium-Term Plan from April 1, 2018.