Insights into T-cell dysfunction in Alzheimer's disease.

Area of Science:

• Neuroimmunology
• Immunology
• Neuroscience

Background:

• T cells are crucial for adaptive immunity but are dysfunctional in Alzheimer's disease (AD).
• Neuroinflammation significantly modulates AD pathogenesis, with aberrant T cells contributing indirectly through proinflammatory mediators and glial cell crosstalk.
• The mechanisms behind T-cell abnormalities in AD are multifactorial and linked to AD risk factors and pathological hallmarks.

Purpose of the Study:

• To review how Alzheimer's disease (AD) risk factors modulate T-cell activation.
• To examine the association between T cells and pathological AD hallmarks.
• To provide a comprehensive view for developing therapeutic strategies for AD.

Main Methods:

• Literature review of studies on T cells, AD risk factors, and AD pathology.
• Analysis of the interplay between immune responses and AD pathogenesis.
• Synthesis of current understanding of T-cell modulation in AD.

Main Results:

• AD risk factors, including Apolipoprotein E (ApoE), amyloid-beta (Aβ), secretase enzymes, Tau protein, and neuroinflammation, are linked to altered T-cell activation.
• T cells are associated with key pathological hallmarks of AD, suggesting a role in disease progression.
• Dysfunctional T cells contribute to neuroinflammation via interactions with glial cells.

Conclusions:

• Understanding the modulation of T cells by AD risk factors is critical for comprehending AD pathogenesis.
• Targeting T-cell dysfunction presents a potential therapeutic avenue for Alzheimer's disease.
• Further research into the T-cell-AD relationship can inform novel treatment strategies.