Gerard D Schellenberg

Gerard D Schellenberg is a Professor of Pathology and Laboratory Medicine at the University of Pennsylvania Perelman School of Medicine, with graduate affiliations in Genomics and Computational Biology and Neuroscience. His research focuses on the genetic architecture of Alzheimer's disease and related neurodegenerative disorders, particularly through large-scale genomic studies and neuropathological correlations.

Education:

• B.S. in Biochemistry (minor: Cell Biology), University of California at Riverside, 1973
• Ph.D. in Biochemistry (minor: Cell Biology), University of California at Riverside, 1978
• NIH Post Doctoral Fellowship, National Institute of Health, 1980-1982
• Senior Research Fellow positions at University of Washington departments (1978-1983)

Dr. Schellenberg's research program centers on identifying genetic risk factors for Alzheimer's disease through genome-wide association studies (GWAS), whole-genome sequencing, and multi-omics integration. His work emphasizes population diversity, with significant contributions to understanding genetic risk in African American cohorts and sex-specific effects in neurodegeneration. Key focus areas include tauopathies, TDP-43 pathology, and the role of immune-related genes in disease progression. He has pioneered studies on progranulin mutations and their variable phenotypic expression across neurodegenerative conditions.

Recent publications reveal a strong trajectory toward multi-ethnic genetic studies, with emphasis on Alzheimer's disease genetics in underrepresented populations, sex differences in cognitive resilience, and novel risk genes like MGMT and DCDC2. His team integrates neuropathological data with genomic findings to establish causal mechanisms, frequently publishing in high-impact journals like Nature Genetics and Alzheimer's & Dementia.

Key Scientific Contributions:

• Leadership in the Alzheimer's Disease Sequencing Project (ADSP) expanding ethnic diversity in genetics research
• Development of the Alzheimer's Disease Variant Portal (ADVP) for harmonized genetic data
• Pioneering work on APOE-ε4 modifying loci in African ancestry populations
• Identification of sex-specific genetic predictors for memory maintenance

Dr. Schellenberg directs genomic research initiatives that bridge basic science with clinical neuropathology. His laboratory maintains extensive collaborations with neuropathology cores for autopsy-confirmed diagnoses and leverages multi-ethnic cohorts to address health disparities in dementia research. Current work focuses on elucidating how genetic variants influence tau and TDP-43 pathology across diverse populations, with implications for precision medicine approaches to neurodegenerative diseases.