Frontotemporal-TDP and LATE Neurocognitive Disorders: A Pathophysiological and Genetic Approach

Area of Science:

• Neuroscience
• Genetics
• Pathology

Background:

• Frontotemporal lobar degeneration (FTLD) is a leading cause of dementia in individuals under 65.
• Frontotemporal-TDP, a subtype of FTLD, involves TDP-43 protein aggregation in the brain, causing neuronal degeneration and cognitive decline.
• Limbic age-related encephalopathy (LATE) affects the limbic system, impacting memory and emotions, and may share pathogenic pathways with FTLD.

Purpose of the Study:

• To explore the potential overlap in pathogenic processes between FTLD and LATE.
• To investigate the role of transactive response DNA-binding protein 43 (TDP-43) pathology in LATE.
• To understand the genetic factors contributing to both FTLD and LATE.

Main Methods:

• Review of emerging research on FTLD and LATE.
• Analysis of studies investigating TDP-43 protein aggregation.
• Examination of genetic mutations and variants associated with these neurodegenerative diseases.

Main Results:

• Evidence suggests a potential overlap in the underlying pathology of FTLD and LATE, with TDP-43 pathology observed in some LATE cases.
• Genetic factors, including mutations in GRN and C9orf72, are implicated in FTLD.
• Specific genetic variants are associated with an increased risk of LATE.

Conclusions:

• Understanding the shared TDP-43 pathology and genetic links between FTLD and LATE is crucial.
• These insights can inform the development of targeted therapeutic strategies for both conditions.
• Further research into the genetic underpinnings of these neurodegenerative diseases is warranted.