Biodistribution and metabolism of [N-methyl-11C]m-hydroxyephedrine in the rat

M P Law, S Osman, R J Davenport, V J Cunningham, V W Pike, P G Camici

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Biodistribution and metabolism of [N-methyl-11C]m-hydroxyephedrine ([11C]mHED), an analogue of noradrenaline, were assessed in rats. Pretreatment with desipramine, an uptake blocker, reduced uptake of radioactivity in myocardium but not in lung, liver, kidney, and muscle. Brain uptake was negligible. HPLC showed six radioactive metabolites in plasma and liver but none in myocardium. Co-injection of unlabelled mHED or metaraminol with [11C]mHED demonstrated no difference between the in vivo binding potentials for mHED and metaraminol in myocardium.
Original languageEnglish
Pages (from-to)417-24
Number of pages8
JournalNuclear Medicine and Biology
Issue number5
Publication statusPublished - 1997



  • Animals
  • Carbon Radioisotopes
  • Desipramine
  • Dose-Response Relationship, Drug
  • Ephedrine
  • Male
  • Myocardium
  • Rats
  • Rats, Sprague-Dawley
  • Tissue Distribution

Cite this

Law, M. P., Osman, S., Davenport, R. J., Cunningham, V. J., Pike, V. W., & Camici, P. G. (1997). Biodistribution and metabolism of [N-methyl-11C]m-hydroxyephedrine in the rat. Nuclear Medicine and Biology, 24(5), 417-24.