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Alzheimer's Disease: Overview01:26

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Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
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Neuroinflammation in Alzheimer disease.

Michael T Heneka1, Wiesje M van der Flier2, Frank Jessen3

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Immune processes are key in Alzheimer disease pathogenesis. Understanding these mechanisms, genetics, and lifestyle factors is crucial for developing new treatments targeting neuroinflammation.

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Area of Science:

  • Neuroscience
  • Immunology
  • Genetics

Background:

  • Alzheimer disease (AD) is the most common neurodegenerative disorder.
  • Immune system activation (innate and adaptive) plays a significant role in AD pathogenesis.
  • AD has a long preclinical phase where immune mechanisms drive disease progression.

Purpose of the Study:

  • To review the cell types and pathological mechanisms involved in Alzheimer disease development.
  • To explore the influence of genetics and lifestyle factors on AD pathogenesis.
  • To discuss emerging therapeutic strategies targeting neuroinflammation in AD.

Main Methods:

  • Review of experimental, epidemiological, neuropathological, and genetic studies.
  • Analysis of immune cell types and pathological pathways in AD.
  • Examination of genetic and lifestyle influences on disease progression.

Main Results:

  • Evidence strongly implicates immune processes in Alzheimer disease.
  • Genetics and lifestyle factors modulate immune responses in AD.
  • Neuroinflammation is a critical driver of AD spread and progression.

Conclusions:

  • A precise understanding of immune cells and mechanisms in AD is essential for effective treatment development.
  • Targeting neuroinflammation represents a promising therapeutic avenue for Alzheimer disease.
  • New treatments focusing on neuroinflammation are entering clinical trials.