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Articles by Colin L. Masters
Total Records ( 3 ) for Colin L. Masters
  Mary D. Naylor , Jason H. Karlawish , Steven E. Arnold , Ara S. Khachaturian , Zaven S. Khachaturian , Virginia M.-Y. Lee , Matthew Baumgart , Sube Banerjee , Cornelia Beck , Kaj Blennow , Ron Brookmeyer , Kurt R. Brunden , Kathleen C. Buckwalter , Meryl Comer , Kenneth Covinsky , Lynn Friss Feinberg , Giovanni Frisoni , Colin Green , Renato Maia Guimaraes , Lisa P. Gwyther , Franz F. Hefti , Michael Hutton , Claudia Kawas , David M. Kent , Lewis Kuller , Kenneth M. Langa , Robert W. Mahley , Katie Maslow , Colin L. Masters , Diane E. Meier , Peter J. Neumann , Steven M. Paul , Ronald C. Petersen , Mark A. Sager , Mary Sano , Dale Schenk , Holly Soares , Reisa A. Sperling , Sidney M. Stahl , Vivianna van Deerlin , Yaakov Stern , David Weir , David A. Wolk and John Q. Trojanowski
  To address the pending public health crisis due to Alzheimer‘s disease (AD) and related neurodegenerative disorders, the Marian S. Ware Alzheimer Program at the University of Pennsylvania held a meeting entitled "State of the Science Conference on the Advancement of Alzheimer's Diagnosis, Treatment and Care," on June 21-22, 2012. The meeting comprised four workgroups focusing on Biomarkers; Clinical Care and Health Services Research; Drug Development; and Health Economics, Policy, and Ethics. The workgroups shared, discussed, and compiled an integrated set of priorities, recommendations, and action plans, which are presented in this article.
  Maria C. Carrillo , Christopher C. Rowe , Cassandra Szoeke , Colin L. Masters , David Ames , Tim O’Meara , S. Lance Macaulay , Andrew Milner , Kathryn A. Ellis , Paul Maruff , Stephanie R. Rainey- Smith , Ralph N. Martins , Lisa J. Bain and Richard J. Head
  Alzheimer's disease (AD) is an epidemic facing the entire world. Increased knowledge gained during the past 25 years indicates that AD falls along a clinical and neuropathological spectrum represented as a continuum that extends from preclinical disease in which there are no symptoms, through early symptomatic phases, and finally to AD dementia. The Alzheimer's research community recognizes that imaging, body fluids, and cognitive biomarkers contribute to enhanced diagnostic confidence for AD. There has also been emerging consensus regarding the use of AD biomarkers in clinical trials. The use of biomarkers in clinical trials and practice is hampered by the lack of standardization. In response to the emerging need for standardization, an international meeting of AD researchers was held in Melbourne, Australia, in March 2012 to bring together key researchers, clinicians, industry, and regulatory stakeholders with the aim of generating consensus on standardization and validation of cognitive, imaging, and fluid biomarkers, as well as lifestyle parameters used in research centers worldwide.
  Paul S. Donnelly , Aphrodite Caragounis , Tai Du , Katrina M. Laughton , Irene Volitakis , Robert A. Cherny , Robyn A. Sharples , Andrew F. Hill , Qiao-Xin Li , Colin L. Masters , Kevin J. Barnham and Anthony R. White
  Copper and zinc play important roles in Alzheimer disease pathology with recent reports describing potential therapeutics based on modulation of metal bioavailability. We examined the ability of a range of metal bis(thiosemicarbazonato) complexes (MII(btsc), where M = CuII or ZnII) to increase intracellular metal levels in Chinese hamster ovary cells overexpressing amyloid precursor protein (APP-CHO) and the subsequent effect on extracellular levels of amyloid-β peptide (Aβ). The CuII(btsc) complexes were engineered to be either stable to both a change in oxidation state and dissociation of metal or susceptible to intracellular reduction and dissociation of metal. Treatment of APP-CHO cells with stable complexes resulted in elevated levels of intracellular copper with no effect on the detected levels of Aβ. Treatment with complexes susceptible to intracellular reduction increased intracellular copper levels but also resulted in a dose-dependent reduction in the levels of monomeric Aβ. Treatment with less stable ZnII(btsc) complexes increased intracellular zinc levels with a subsequent dose-dependent depletion of monomeric Aβ levels. The increased levels of intracellular bioavailable copper and zinc initiated a signaling cascade involving activation of phosphoinositol 3-kinase and c-Jun N-terminal kinase. Inhibition of these enzymes prevented Aβ depletion induced by the MII(btsc) complexes. Inhibition of metalloproteases also partially restored Aβ levels, implicating metal-driven metalloprotease activation in the extracellular monomeric Aβ depletion. However, a role for alternative metal-induced Aβ metabolism has not been ruled out. These studies demonstrate that MII(btsc) complexes have potential for Alzheimer disease therapy.
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