Scholarlink

Purpose <p>This study aimed to develop and evaluate 5-[¹⁸F]F-αMe-3BPA, a novel PET probe designed as a theranostic partner for 5F-αMe-3[¹⁰B]BPA in Boron Neutron Capture Therapy (BNCT). The goal was to address limitations of the clinically used BPA/[¹⁸F]FBPA pair, including poor water solubility, limited LAT1 specificity, and suboptimal diagnostic performance, thereby improving tumor-selective drug delivery and enabling accurate prediction of therapeutic biodistribution through structure-matched PET/BNCT.</p> Methods <p>LAT1 dependency was tested in vitro using cancer cell lines with differential LAT1 expression. In vivo biodistribution of both therapeutic agents and their ¹⁸F-labeled analogs were assessed in xenograft mouse models. Radiosynthesis of 5-[¹⁸F]F-αMe-3BPA was achieved via copper-catalyzed nucleophilic radiofluorination. PET/CT imaging compared tumor visualization with [¹⁸F]FBPA. Co-injection studies (5-[¹⁸F]F-αMe-3BPA/5F-αMe-3BPA and [¹⁸F]FBPA/BPA) quantitatively evaluated concordance between ¹⁸F radioactivity and boron concentrations across tissues.</p> Results <p>5F-αMe-3BPA uptake in cancer cells was strictly LAT1-dependent. In LAT1-high T3M-4 xenografts, its tumor-to-muscle boron ratio (22) far exceeded BPA (3.4). 5-[¹⁸F]F-αMe-3BPA was synthesized successfully and achieved a tumor-to-muscle ratio of 29 versus 5.3 for [¹⁸F]FBPA. PET imaging showed clear, high-contrast visualization of T3M-4 tumors, with co-injection confirming strong concordance between PET probe and therapeutic agent biodistribution.</p> Conclusion <p>The 5-[¹⁸F]F-αMe-3BPA/5F-αMe-3[¹⁰B]BPA theranostic pair demonstrates high LAT1 specificity, low normal tissue uptake, and strong pharmacokinetic alignment, enabling accurate prediction of therapeutic boron delivery for BNCT. Furthermore, 5-[¹⁸F]F-αMe-3BPA shows promise as a dedicated LAT1 imaging probe for advancing LAT1-targeted therapies.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

A LAT1-selective PET tracer, 5-[¹⁸F]F-αMe-3BPA, as a companion to its structurally matched ¹⁰B analog in boron neutron capture therapy

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月18日

查看全文
  • Naoya Kondo,
  • Fuko Hirano,
  • Yasukazu Kanai,
  • Kensuke Suzuki,
  • Anna Miyazaki,
  • Takashi Temma

摘要

Purpose

This study aimed to develop and evaluate 5-[¹⁸F]F-αMe-3BPA, a novel PET probe designed as a theranostic partner for 5F-αMe-3[¹⁰B]BPA in Boron Neutron Capture Therapy (BNCT). The goal was to address limitations of the clinically used BPA/[¹⁸F]FBPA pair, including poor water solubility, limited LAT1 specificity, and suboptimal diagnostic performance, thereby improving tumor-selective drug delivery and enabling accurate prediction of therapeutic biodistribution through structure-matched PET/BNCT.

Methods

LAT1 dependency was tested in vitro using cancer cell lines with differential LAT1 expression. In vivo biodistribution of both therapeutic agents and their ¹⁸F-labeled analogs were assessed in xenograft mouse models. Radiosynthesis of 5-[¹⁸F]F-αMe-3BPA was achieved via copper-catalyzed nucleophilic radiofluorination. PET/CT imaging compared tumor visualization with [¹⁸F]FBPA. Co-injection studies (5-[¹⁸F]F-αMe-3BPA/5F-αMe-3BPA and [¹⁸F]FBPA/BPA) quantitatively evaluated concordance between ¹⁸F radioactivity and boron concentrations across tissues.

Results

5F-αMe-3BPA uptake in cancer cells was strictly LAT1-dependent. In LAT1-high T3M-4 xenografts, its tumor-to-muscle boron ratio (22) far exceeded BPA (3.4). 5-[¹⁸F]F-αMe-3BPA was synthesized successfully and achieved a tumor-to-muscle ratio of 29 versus 5.3 for [¹⁸F]FBPA. PET imaging showed clear, high-contrast visualization of T3M-4 tumors, with co-injection confirming strong concordance between PET probe and therapeutic agent biodistribution.

Conclusion

The 5-[¹⁸F]F-αMe-3BPA/5F-αMe-3[¹⁰B]BPA theranostic pair demonstrates high LAT1 specificity, low normal tissue uptake, and strong pharmacokinetic alignment, enabling accurate prediction of therapeutic boron delivery for BNCT. Furthermore, 5-[¹⁸F]F-αMe-3BPA shows promise as a dedicated LAT1 imaging probe for advancing LAT1-targeted therapies.