Why Alzheimer’s Disease Targets Some Cells First: A Clue in the Anterior Hypothalamus

A comprehensive characterization of Alzheimer’s pathology in the human master circadian rhythm clock, identifying molecular drivers that confer selective neuronal vulnerability to tau accumulation, integrated with spatial omics in rigorously curated human postmortem tissue.

Alzheimer’s disease damages some brain cells early while sparing others, but the reasons remain unclear. This project focuses on the hypothalamus, a tiny neuromodulatory subcortical region that regulates sleep, mood, and hormones, functions that are often disrupted in the early stages of Alzheimer’s. Using advanced mapping of human brain tissue at the gene expression level, we will study how support human brain cells and the cellular microenvironment shape which neurons survive or degenerate, paving the way for precision treatments that improve daily life beyond memory loss.

This project is innovative in three ways. First, it investigates the human suprachiasmatic nucleus (SCN), the brain’s master circadian clock, an understudied region in patients despite circadian dysfunction being an early feature of Alzheimer’s, leveraging well-curated human postmortem tissues. Second, it establishes the SCN and neighboring hypothalamic nuclei as a unique subcortical model of selective neuronal vulnerability, where adjacent neuronal populations display distinct susceptibility to tau pathology. Third, by integrating quantitative neuropathology with spatial transcriptomics, it will define cellular responses to early tau-driven neurodegeneration and neuronal resilience.

This research addresses a major unmet need in Alzheimer’s disease by identifying mechanisms underlying selective neuronal vulnerability in sleep- and circadian-regulating circuits. By examining neuron–glia interactions and autophagy pathways, it may uncover a therapeutic strategy to slow neurodegeneration and improve symptoms that affect patients’ quality of life. Scientifically, it establishes the human hypothalamus as a novel subcortical model of selective vulnerability and provides a mechanistic framework linking neuronal fate to local cellular environments, generating resources relevant to AD and related tauopathies.