Timothy J. Hohman

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.

Sep 20, 2024 | nature.com | Shannon L. Risacher |Paula J Bice |Jared Brosch |Kelley Faber |Martin R Farlow |Tatiana Foroud | +29 more

AbstractDetermining the genetic architecture of Alzheimer’s disease pathologies can enhance mechanistic understanding and inform precision medicine strategies. Here, we perform a genome-wide association study of cortical tau quantified by positron emission tomography in 3046 participants from 12 independent studies. The CYP1B1-RMDN2 locus is associated with tau deposition.

Aug 13, 2024 | nature.com | Michael Duggan |Pyry N Sipilä |Joni V Lindbohm |Yifei Lu |Christos Davatzikos |Guray Erus | +7 more

AbstractInfections have been associated with the incidence of Alzheimer disease and related dementias, but the mechanisms responsible for these associations remain unclear. Using a multicohort approach, we found that influenza, viral, respiratory, and skin and subcutaneous infections were associated with increased long-term dementia risk. These infections were also associated with region-specific brain volume loss, most commonly in the temporal lobe.

Feb 7, 2024 | nature.com | Jonas Rybnicek |Earvin Tio |Timothy J. Hohman |Julie Schneider |Yanling Wang |Daniel Felsky

AbstractChanges in high-affinity nicotinic acetylcholine receptors are intricately connected to neuropathology in Alzheimer’s Disease (AD). Protective and cognitive-enhancing roles for the nicotinic α5 subunit have been identified, but this gene has not been closely examined in the context of human aging and dementia.