John D. Fryer

John D. Fryer, Ph.D., is a Professor of Neuroscience and Consultant in MCA Neuroscience at Mayo Clinic in Phoenix, Arizona. His research focuses on the molecular mechanisms of Alzheimer's disease, particularly the roles of genetic risk factors such as CLU, TREM2, and APOE in neuroinflammation, amyloid and tau pathology, and cerebrovascular dysfunction.

His research interests include:

• Pathogenesis of Alzheimer's disease
• Role of microglia and neuroinflammation
• Genetic risk factors in neurodegeneration
• Consequences of sepsis on cognitive decline
• Gut microbiome's influence on mood and cognition

Fryer's lab employs mouse genetic models and in vitro systems to investigate how high-fat diet and exercise alter the gut microbiome and impact anxiety and cognition. His work bridges molecular neuroscience with translational implications for patient care.

The recent articles from his lab demonstrate a strong focus on APOE4-related mechanisms, microglial function, cerebrovascular integrity, and TDP-43 pathology in ALS/FTD. These studies appear in leading journals such as Nature Immunology, Science, Neuron, and Nature Neuroscience, highlighting his contributions to understanding neuroimmune interactions and genetic drivers of neurodegeneration.

Fryer has not been explicitly listed as receiving scientific awards in the provided text.

He advises or collaborates with numerous researchers, though specific student names are not provided in the available information. His lab is actively involved in grant-funded research exploring fundamental mechanisms of brain diseases.

His laboratory investigates the intersection of immune function, genetics, and neural health, with ongoing projects on the gut-brain axis and post-sepsis cognitive impairment.