Novel matrix metalloproteinase inhibitor [18F]marimastat-aryltrifluoroborate as a probe for in vivo positron emission tomography imaging in cancer

Cancer Res. 2010 Oct 1;70(19):7562-9. doi: 10.1158/0008-5472.CAN-10-1584. Epub 2010 Aug 20.

Abstract

Matrix metalloproteinases (MMP), strongly associated pathogenic markers of cancer, have undergone extensive drug development programs. Marimastat, a noncovalent MMP inhibitor, was conjugated with FITC to label cellular metalloproteinase cancer targets in MDA-MB-231 cells in vitro. Punctate localization of active transmembrane MMP14 was observed. For molecular-targeted positron emission tomography imaging of syngeneic 67NR murine mammary carcinoma in vivo, marimastat was (18)F-labeled using a shelf-stable arylboronic ester conjugate as a captor for aqueous [(18)F]fluoride in a novel, rapid one-step reaction at ambient temperature. [(18)F]Marimastat-aryltrifluoroborate localized to the tumors, with labeling being blocked in control animals first loaded with >10-fold excess unlabeled marimastat. The labeled drug cleared primarily via the hepatobiliary and gastrointestinal tract, with multiple animals imaged in independent experiments, confirming the ease of this new labeling strategy.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Borates / chemistry
  • Breast Neoplasms / diagnostic imaging*
  • Breast Neoplasms / enzymology
  • Cell Line, Tumor
  • Enzyme Inhibitors* / chemistry
  • Female
  • Fluorine Radioisotopes* / chemistry
  • Humans
  • Hydroxamic Acids* / chemistry
  • Isoenzymes
  • Isotope Labeling / methods
  • Mammary Neoplasms, Experimental / diagnostic imaging*
  • Mammary Neoplasms, Experimental / enzymology
  • Matrix Metalloproteinase Inhibitors*
  • Mice
  • Mice, Inbred BALB C
  • Positron-Emission Tomography / methods
  • Radiopharmaceuticals* / chemical synthesis

Substances

  • Borates
  • Enzyme Inhibitors
  • Fluorine Radioisotopes
  • Hydroxamic Acids
  • Isoenzymes
  • Matrix Metalloproteinase Inhibitors
  • Radiopharmaceuticals
  • marimastat
  • fluoroboric acid