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Abstract #3316

Sex dimorphism in early Alzheimer’s pathology: Brain connectivity and Behavior in AppNL-F/MAPT double knock-in mice

Inès Ben Abdallah1,2, Marion Sourty1, Mary Mondino1, Laetitia Degiorgis1, Julien Lamy1, Vincent Noblet1, Marion Rame1, Cristiana Pistono2, Aminé Isik2, Marie-Dominique Marinutti2, Céline Héraud2, Hiroki Sasaguri3, Shoko Hashimoto3, Takashi Saito3, Takaomi Saido3, Chantal Mathis2, and Laura Harsan1,4
1ICube, Université de Strasbourg-CNRS, Strasbourg, France, 2LNCA, Université de Strasbourg-CNRS, Strasbourg, France, 3RIKEN Center for Brain Science, 2-1 Hirosawa, Wako-city, Saitama, Japan, 4Department of Biophysics and Nuclear Medicine, University Hospital of Strasbourg, Strasbourg, France

Synopsis

Keywords: Alzheimer's Disease, fMRI (resting state), PreclinicalMRI is a unique tool to study the complexity of functional and structural communication in the brain. To explore the brain architecture of a mouse model of Alzheimer's Disease and highlight sex-dimorphism in the emergence of AD-like signs, we used a recent mouse model, the APPNL-F/MAPT double knock-in (dKI). In preclinical imaging, we used resting-state graph theory approaches in a longitudinal study associated with behavioral evaluation. Functional connectivity of perirhinal, dorsal-hippocampus and midbrain nodes were implicated in early memory impairments in dKI female mice. Interestingly, perirhinal-cortex and dorsal-hippocampus are key regions for object-place associative memory and long-term object-recognition.

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