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Abstract #4049

Longitudinal brain MRI and tauPET provide novel insights for Alzheimer’s Disease trial planning

Michal R Tomaszewski1, Yuchuan Wang1, Bradley T Christian2, Sterling C Johnson3, Christopher C Rowe4, W Joseph Herring1, and Eric D Hostetler1
1Translational Imaging, Merck & Co., Inc., West Point, PA, United States, 2Department of Medical Physics, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI, United States, 3Department of Medicine, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI, United States, 4Department of Nuclear Medicine and Centre for PET, Austin Health, Heidelberg, Australia

Synopsis

Keywords: Alzheimer's Disease, Alzheimer's Disease, Drug Discovery

Motivation: Anatomical MRI plays an important role in Alzheimer’s Disease drug trials, yet the information it provides may not be fully utilized.

Goal(s): Regional brain volume and its atrophy in conjunction with amyloid- and tau-PET can provide valuable information about disease progression and treatment response.

Approach: Local brain atrophy was quantified and correlated with PET biomarkers.

Results: Significant correlation was reported between atrophy and baseline tau-PET in the medial-temporal region as well as robust associations with disease stage and amyloid burden. These findings can be used to understand disease development and therefore capture modulation in pathology with anti-tau and other therapies in trials.

Impact: Understanding the relationships between brain volumetrics, disease severity and tau burden, including significant correlation between medial-temporal atrophy and tauPET presented in this study allows for efficient measurement of treatment response in AD trials.

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