Frontotemporal dementia, Pick's disease.

Area of Science:

• Neuroscience
• Molecular Biology
• Genetics

Background:

• Frontotemporal dementia (FTD), previously known as Pick's disease, is a significant cause of dementia, particularly early-onset forms.
• FTD represents 12-15% of all dementias and 30-50% of early-onset cases.
• Clinical presentations are diverse, including behavioral and language impairments, as well as extrapyramidal syndromes like corticobasal degeneration (CBD) and progressive supranuclear palsy (PSP).

Purpose of the Study:

• To summarize recent advancements in the molecular biology of frontotemporal dementia (FTD).
• To highlight the convergence of different clinical presentations of FTD based on affected brain regions.
• To discuss the genetic underpinnings and proteinopathies associated with FTD.

Main Methods:

• Review of recent scientific literature on FTD molecular biology.
• Analysis of genetic mutations (e.g., tau, progranulin) and proteinopathies (TDP-43, FUS).
• Correlation of clinical phenotypes with neuropathological findings.

Main Results:

• A majority of FTD cases involve TDP-43 proteinopathies, with a growing number identified as FUS proteinopathies, often shared with Amyotrophic Lateral Sclerosis (ALS).
• Less than half of FTD cases are tauopathies.
• Mutations in genes such as tau and progranulin on Chromosome 17 (Ch-17) provide insights into molecular mechanisms.

Conclusions:

• Recent molecular discoveries, particularly TDP-43 and FUS proteinopathies, offer potential pharmacological targets for FTD treatment.
• Understanding the molecular basis of FTD is crucial for developing effective therapies.
• A glossary is provided to aid in comprehending the complex terminology associated with FTD research.