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- W2040256536 abstract "As we celebrate the bicentennial of the isolation of morphine by Sertürner, opioids continue to dominate major sectors of the analgesic market worldwide. The pharmaceutical industry stands to benefit greatly from molecular imaging in preclinical and early clinical trials of new or improved opioid drugs. At this juncture, it seems fitting to summarize the past twenty or so years of research on molecular imaging of the opioid system from the viewpoint of drug discovery and development. Opioid receptors were first imaged in human volunteers by positron emission tomography (PET) in 1984. Now, quantitative PET imaging of the major opioid receptor types (μ, δ, κ) is possible in the brain and peripheral organs of healthy persons and patient populations. Radioligands are under development for single photon emission computed tomography (SPECT) of opioid receptors as well. These functional, nuclear imaging techniques can trace the fate of radiolabeled molecules directly, but non-invasively, and allow precise pharmacokinetic and pharmacodynamic measurements. Molecular imaging provides unique data that can aid in selecting the best drug candidates, determining optimal dosing regimens, clearing regulatory hurdles and lowering risks of failure. Using a historical perspective, this review touches on opioid receptors as drug targets, and focuses on the status and use of radiotracers for opioid receptor PET and SPECT. Selected studies are discussed to illustrate the power of molecular imaging for facilitating opioid drug discovery and development. Keywords: Opioid receptor, PET, SPECT, diprenorphine, naltrindole, carfentanil, carbon-11, iodine-123" @default.
- W2040256536 created "2016-06-24" @default.
- W2040256536 creator A5018939644 @default.
- W2040256536 date "2007-01-01" @default.
- W2040256536 modified "2023-09-26" @default.
- W2040256536 title "PET and SPECT Imaging of the Opioid System: Receptors, Radioligands and Avenues for Drug Discovery and Development" @default.
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