Andrew J. Saykin

Nov 6, 2024 | nature.com | Duygu Tosun |Meryl A. Butters |Andrew J. Saykin |Arthur W. Toga |Clifford R. Jack

AbstractThis study was conducted to clarify patterns of cortico-limbic volume abnormalities in late life depression (LLD) relative to non-depressed (ND) adults matched for amyloid β (Aβ) deposition and to evaluate the relationship of volume abnormalities with cognitive performance. Participants included 116 LLD and 226 ND. Classification accuracy of LLD status was estimated using area under the receiver operator characteristic curve.

Oct 8, 2024 | nature.com | Yuriko Katsumata |Steven A. Claas |Bernardo Aguzzoli Heberle |Madeline Page |Timothy J. Hohman |Shubhabrata Mukherjee | +6 more

AbstractGenome-wide association studies (GWAS) have identified >80 Alzheimer’s disease and related dementias (ADRD)-associated genetic loci. However, the clinical outcomes used in most previous studies belie the complex nature of underlying neuropathologies.

Oct 4, 2024 | nature.com | Junhao Wen |Ilya M. Nasrallah |Guray Erus |Jingxuan Bao |Andrew J. Saykin |Timothy J. Hohman | +11 more

AbstractAlzheimer’s disease (AD) is associated with heterogeneous atrophy patterns. We employed a semi-supervised representation learning technique known as Surreal-GAN, through which we identified two latent dimensional representations of brain atrophy in symptomatic mild cognitive impairment (MCI) and AD patients: the “diffuse-AD” (R1) dimension shows widespread brain atrophy, and the “MTL-AD” (R2) dimension displays focal medial temporal lobe (MTL) atrophy.

Jun 20, 2024 | nature.com | Özkan İş |Xue Wang |Joseph S. Reddy |Yuhao Min |Elanur Yilmaz |Prabesh Bhattarai | +19 more

AbstractTo uncover molecular changes underlying blood-brain-barrier dysfunction in Alzheimer’s disease, we performed single nucleus RNA sequencing in 24 Alzheimer’s disease and control brains and focused on vascular and astrocyte clusters as main cell types of blood-brain-barrier gliovascular-unit. The majority of the vascular transcriptional changes were in pericytes.