The effects of glutathione depletion on the biodistribution of Cu(PTSM) in rats

Amy Barnhart-Bott, Mark A. Green

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The tissue retention of radiocopper afforded by intravenous injection of the proposed blood flow imaging agent, 62Cu-labeled copper(II) pyruvaldehyde bis(N4-methylthiosemicarbazone) [Cu(PTSM)], is thought to result from reductive decomposition of the copper(II) complex by intracellular sulfhydryls (e.g. glutathione, GSH). To determine if the tissue uptake and retention of this tracer adequately measures perfusion in tissues containing altered GSH concentrations, the biodistribution of copper-67 labeled Cu(PTSM) was determined in GSH-depleted rats. Despite treatment to induce relatively large reductions in tissue GSH levels, it was found that only very small changes in the biodistribution of copper-labeled Cu(PTSM) occurred in the treated rats compared to untreated controls.

Original languageEnglish (US)
Pages (from-to)865-869
Number of pages5
JournalInternational Journal of Radiation Applications and Instrumentation.
Issue number8
StatePublished - 1991


ASJC Scopus subject areas

  • Medicine(all)

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