Hub Disruption and Alzheimer's Disease Severity
Author Information
Author(s): Tu Jiaxin Cindy, Millar Peter R., Strain Jeremy F., Eck Andrew, Adeyemo Babatunde, Snyder Abraham Z., Daniels Alisha, Karch Celeste, Huey Edward D., McDade Eric, Day Gregory S., Yakushev Igor, Hassenstab Jason, Morris John, Llibre-Guerra Jorge J., Ibanez Laura, Jucker Mathias, Mendez Patricio Chrem, Perrin Richard J., Benzinger Tammie L. S., Jack Clifford R. Jr., Betzel Richard, Ances Beau M., Eggebrecht Adam T., Gordon Brian A., Wheelock Muriah D.
Primary Institution: Washington University in St. Louis
Hypothesis
Hub disruption is an early-emerging phenomenon that intensifies with disease progression in autosomal dominant Alzheimer's disease.
Conclusion
The study found that hub disruption in brain connectivity increases with the severity of dementia in Alzheimer's disease and can be detected up to 12 years before clinical symptoms appear.
Supporting Evidence
- Hubs in the brain are more vulnerable to damage in Alzheimer's disease.
- Disruptions in connectivity can be detected before clinical symptoms appear.
- Hub disruption correlates with cognitive decline in Alzheimer's disease.
- Functional connectivity changes are linked to amyloid deposition.
Takeaway
The brain's important connection points, called hubs, get disrupted as Alzheimer's disease gets worse, and we can see these changes even before people start showing symptoms.
Methodology
The study analyzed functional connectivity in individuals with autosomal dominant Alzheimer's disease, comparing mutation carriers and non-carriers across different stages of dementia.
Potential Biases
The sample may not represent older populations, as participants were relatively young.
Limitations
The study sample was biased towards participants with less severe symptoms due to increased head motion in more severe cases.
Participant Demographics
Participants included 122 mutation carriers and 85 non-carrier family members, with ages ranging from 18 to 69 years.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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