Transposable elements as new players in neurodegenerative diseases

Area of Science:

• Genetics
• Neuroscience
• Molecular Biology

Background:

• Neurodegenerative diseases (NDs) share common pathological features, but their molecular mechanisms remain largely unknown.
• Transposable elements (TEs), previously considered non-functional DNA, are increasingly implicated in ND pathogenesis.
• Aging, a major risk factor for NDs, is associated with the failure of mechanisms that suppress TEs.

Purpose of the Study:

• To explore the role of transposable elements (TEs) as pathogenic factors in neurodegenerative diseases.
• To investigate the link between aging, TE derepression, and neurodegeneration.
• To identify TEs as potential therapeutic targets for neuroprotection.

Main Methods:

• Review of existing literature on TEs, aging, and neurodegenerative diseases.
• Analysis of evidence linking TE activation to neurodegenerative pathologies.
• Exploration of potential mechanisms by which TEs contribute to neuronal dysfunction.

Main Results:

• TEs are derepressed with age due to the failure of epigenetic silencing mechanisms like heterochromatinization.
• Pathogenic proteins associated with NDs (e.g., tau, TDP-43) may regulate TE expression.
• TE activation can lead to DNA damage, genomic instability, altered gene expression, and neuroinflammation, all hallmarks of aging and NDs.

Conclusions:

• Transposable elements represent an underappreciated contributor to both brain aging and neurodegeneration.
• Inhibiting TE activity may offer a novel therapeutic strategy for neuroprotection.
• Further research into TE function in the nervous system is warranted.