• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2022 Fiscal Year Annual Research Report

New strategy of diagnostic imaging probes prior to administrating molecular target drugs

Research Project

Project/Area Number 20K16722
Research InstitutionKanazawa University

Principal Investigator

Effendi Nurmaya  金沢大学, 新学術創成研究機構, 研究協力員 (60842911)

Project Period (FY) 2021-11-01 – 2023-03-31
KeywordsImaging / Osimertinib / Peptide / EGFR / PDGFRb / TKI / NSCLC
Outline of Annual Research Achievements

Tyrosine kinase receptors (TKRs) are transmembrane proteins consisting of the extracellular domain for ligand binding and the intracellular part for signaling. Platelet-derived growth factor receptor β (PDGFRβ) and Epidermal growth factor receptor (EGFR) are the subfamilies of RTKs. Seven radiotracers, 67Ga-DOTA-linker-IPLPPPRRPFFK peptides, were synthesized. Their feasibility as PDGFRb imaging agents were evaluated in vitro and in vivo. [67Ga]Ga-DOTA-EG2-IPLPPPRRPFFK and [67Ga]Ga-DOTA-EG4-IPLPPPRRPFFK showed promising results than others. Two radiohalogenated Osimertinib, 125I-Osimertinib & 77Br-Osimertinib, were synthesized. Their feasibilities as imaging agents of NSCLC with L858R/T790M mutation were evaluated in vitro and in vivo. Their accumulation in tumors was higher than in blood and muscle. However, the accumulations of [125I]I-Osimertinib and [77Br]Br-Osimertinib in the lung were much higher than those in the tumors, which can interfere with the visualization of the mutation status of the NSCLC patients. Therefore, structural modification of radiohalogenated Osimertinib is still needed. To visualize EFGR with L858R/T790M mutation, a novel probe peptide-osimertinib-conjugated compound containing an enzyme-cleavable linker is currently being synthesized and evaluated.

  • Research Products

    (1 results)

All 2022

All Journal Article (1 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Development of Radiohalogenated Osimertinib Derivatives as Imaging Probes for Companion Diagnostics of Osimertinib2022

    • Author(s)
      Mishiro Kenji、Nishii Ryuichi、Sawazaki Izumi、Sofuku Tomoki、Fuchigami Takeshi、Sudo Hitomi、Effendi Nurmaya、Makino Akira、Kiyono Yasushi、Shiba Kazuhiro、Taki Junichi、Kinuya Seigo、Ogawa Kazuma
    • Journal Title

      Journal of Medicinal Chemistry

      Volume: 65 Pages: 1835~1847

    • DOI

      10.1021/acs.jmedchem.1c01211

    • Int'l Joint Research

URL: 

Published: 2024-12-25  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi