H Umesha Shetty

Summary

Affiliation: National Institutes of Health
Country: USA

Publications

  1. pmc Characterization of fast-decaying PET radiotracers solely through LC-MS/MS of constituent radioactive and carrier isotopologues
    H Umesha Shetty
    Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Building 10, Room B3 C351, 10 Center Drive, MSC 1003, Bethesda, MD, 20892 1003, USA
    EJNMMI Res 3:3. 2013
  2. pmc Radiodefluorination of 3-fluoro-5-(2-(2-[18F](fluoromethyl)-thiazol-4-yl)ethynyl)benzonitrile ([18F]SP203), a radioligand for imaging brain metabotropic glutamate subtype-5 receptors with positron emission tomography, occurs by glutathionylation in rat br
    H Umesha Shetty
    Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892 1003, USA
    J Pharmacol Exp Ther 327:727-35. 2008
  3. ncbi request reprint Identification and regional distribution in rat brain of radiometabolites of the dopamine transporter PET radioligand [11C]PE2I
    H Umesha Shetty
    PET Radiopharmaceutical Sciences, Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Building 10, Room B3 C351, MSC 1003, 10 Center Drive, Bethesda, MD 20892 1003, USA
    Eur J Nucl Med Mol Imaging 34:667-78. 2007
  4. ncbi request reprint Synthesis and evaluation of N-methyl and S-methyl 11C-labeled 6-methylthio-2-(4'-N,N-dimethylamino)phenylimidazo[1,2-a]pyridines as radioligands for imaging beta-amyloid plaques in Alzheimer's disease
    Lisheng Cai
    Molecular Imaging Branch and Clinical Brain Disorders Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland 20892, USA
    J Med Chem 51:148-58. 2008
  5. pmc Single-step high-yield radiosynthesis and evaluation of a sensitive 18F-labeled ligand for imaging brain peripheral benzodiazepine receptors with PET
    Emmanuelle Briard
    Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland 20892, USA
    J Med Chem 52:688-99. 2009
  6. ncbi request reprint Synthesis and evaluation in monkey of two sensitive 11C-labeled aryloxyanilide ligands for imaging brain peripheral benzodiazepine receptors in vivo
    Emmanuelle Briard
    Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland 20892, USA
    J Med Chem 51:17-30. 2008
  7. ncbi request reprint Synthesis and initial evaluation of [11C](R)-RWAY in monkey-a new, simply labeled antagonist radioligand for imaging brain 5-HT1A receptors with PET
    Julie A McCarron
    Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Building 10, B3 C346A, 10 Center Drive, Bethesda, MD 20892, USA
    Eur J Nucl Med Mol Imaging 34:1670-82. 2007
  8. ncbi request reprint PET imaging of the dopamine transporter with 18F-FECNT: a polar radiometabolite confounds brain radioligand measurements
    Sami S Zoghbi
    Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland 20892 0135, USA
    J Nucl Med 47:520-7. 2006
  9. pmc Effects of ketoconazole on the biodistribution and metabolism of [11C]loperamide and [11C]N-desmethyl-loperamide in wild-type and P-gp knockout mice
    Nicholas Seneca
    Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892, USA
    Nucl Med Biol 37:335-45. 2010
  10. ncbi request reprint Synthesis and evaluation of two 18F-labeled 6-iodo-2-(4'-N,N-dimethylamino)phenylimidazo[1,2-a]pyridine derivatives as prospective radioligands for beta-amyloid in Alzheimer's disease
    Lisheng Cai
    Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, 10 Center Drive, Bethesda, Maryland 20892, USA
    J Med Chem 47:2208-18. 2004

Detail Information

Publications10

  1. pmc Characterization of fast-decaying PET radiotracers solely through LC-MS/MS of constituent radioactive and carrier isotopologues
    H Umesha Shetty
    Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Building 10, Room B3 C351, 10 Center Drive, MSC 1003, Bethesda, MD, 20892 1003, USA
    EJNMMI Res 3:3. 2013
    ..abstract:..
  2. pmc Radiodefluorination of 3-fluoro-5-(2-(2-[18F](fluoromethyl)-thiazol-4-yl)ethynyl)benzonitrile ([18F]SP203), a radioligand for imaging brain metabotropic glutamate subtype-5 receptors with positron emission tomography, occurs by glutathionylation in rat br
    H Umesha Shetty
    Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892 1003, USA
    J Pharmacol Exp Ther 327:727-35. 2008
    ..Thus, glutathionylation at the 2-fluoromethyl group is responsible for the radiodefluorination of [(18)F]SP203 in rat. This study provides the first demonstration of glutathione-promoted radiodefluorination of a PET radioligand...
  3. ncbi request reprint Identification and regional distribution in rat brain of radiometabolites of the dopamine transporter PET radioligand [11C]PE2I
    H Umesha Shetty
    PET Radiopharmaceutical Sciences, Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Building 10, Room B3 C351, MSC 1003, 10 Center Drive, Bethesda, MD 20892 1003, USA
    Eur J Nucl Med Mol Imaging 34:667-78. 2007
    ..We aimed to determine the composition of radioactivity in rat brain after intravenous administration of the dopamine transporter radioligand, [(11)C]PE2I...
  4. ncbi request reprint Synthesis and evaluation of N-methyl and S-methyl 11C-labeled 6-methylthio-2-(4'-N,N-dimethylamino)phenylimidazo[1,2-a]pyridines as radioligands for imaging beta-amyloid plaques in Alzheimer's disease
    Lisheng Cai
    Molecular Imaging Branch and Clinical Brain Disorders Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland 20892, USA
    J Med Chem 51:148-58. 2008
    ..The ex vivo brain radiometabolites observed in rats have a peripheral origin. Overall, [ (11)C] 7 merits further evaluation in human subjects...
  5. pmc Single-step high-yield radiosynthesis and evaluation of a sensitive 18F-labeled ligand for imaging brain peripheral benzodiazepine receptors with PET
    Emmanuelle Briard
    Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland 20892, USA
    J Med Chem 52:688-99. 2009
    ..In rat, a low level radiometabolite of intermediate lipophilicity was identified as [18F]2-fluoro-N-(2-phenoxyphenyl)acetamide ([18F]11). [18F]9 is a promising radioligand for future imaging of PBR in living human brain...
  6. ncbi request reprint Synthesis and evaluation in monkey of two sensitive 11C-labeled aryloxyanilide ligands for imaging brain peripheral benzodiazepine receptors in vivo
    Emmanuelle Briard
    Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland 20892, USA
    J Med Chem 51:17-30. 2008
    ..11)C] 3 and [ (11)C] 10 are effective for imaging PBR in monkey brain. [ (11)C] 10 especially warrants further evaluation in human subjects...
  7. ncbi request reprint Synthesis and initial evaluation of [11C](R)-RWAY in monkey-a new, simply labeled antagonist radioligand for imaging brain 5-HT1A receptors with PET
    Julie A McCarron
    Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Building 10, B3 C346A, 10 Center Drive, Bethesda, MD 20892, USA
    Eur J Nucl Med Mol Imaging 34:1670-82. 2007
    ..We aimed to fulfill a need for a radioligand that may be simply labeled with carbon-11 for effective positron emission tomography (PET) imaging of brain 5-HT(1A) receptors...
  8. ncbi request reprint PET imaging of the dopamine transporter with 18F-FECNT: a polar radiometabolite confounds brain radioligand measurements
    Sami S Zoghbi
    Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland 20892 0135, USA
    J Nucl Med 47:520-7. 2006
    ....
  9. pmc Effects of ketoconazole on the biodistribution and metabolism of [11C]loperamide and [11C]N-desmethyl-loperamide in wild-type and P-gp knockout mice
    Nicholas Seneca
    Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892, USA
    Nucl Med Biol 37:335-45. 2010
    ..We aimed to test whether inhibition of CYP3A4 with ketoconazole might reduce the metabolism of [(11)C]loperamide and [(11)C]dLop in mice, and thereby improve the quality of these radiotracers...
  10. ncbi request reprint Synthesis and evaluation of two 18F-labeled 6-iodo-2-(4'-N,N-dimethylamino)phenylimidazo[1,2-a]pyridine derivatives as prospective radioligands for beta-amyloid in Alzheimer's disease
    Lisheng Cai
    Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, 10 Center Drive, Bethesda, Maryland 20892, USA
    J Med Chem 47:2208-18. 2004
    ....