Coding and non-coding RNA expression in NSC34 cells following TDP-43 depletion and mutant TDP-43 M337V expression.

Area of Science:

• Neuroscience
• Molecular Biology
• Genetics

Background:

• Neurodegenerative disorders (NDDs), including amyotrophic lateral sclerosis (ALS) and frontotemporal lobar degeneration (FTLD), are linked to abnormal cytoplasmic aggregation of TAR DNA-binding protein 43 (TDP-43).
• TDP-43 normally functions in the nucleus, regulating RNA processing and metabolism. Its mislocalization and dysfunction are implicated in NDD pathogenesis.
• Understanding how TDP-43 alterations affect RNA is key to deciphering disease mechanisms in ALS and related TDP-43 proteinopathies.

Purpose of the Study:

• To investigate the impact of TDP-43 depletion and the M337V mutation on RNA profiles in a motor neuron model.
• To generate transcriptomics datasets for comprehensive analysis of gene expression changes in NSC34 motor neuron-like cells.
• To identify cellular pathways and regulatory networks affected by TDP-43 dysfunction.

Main Methods:

• Utilized RNA interference (RNAi) to knock down TDP-43 expression in NSC34 cells.
• Overexpressed the ALS-associated TDP-43 M337V mutation in NSC34 cells.
• Performed next-generation sequencing on enriched small and large RNA transcripts from treated cells.

Main Results:

• Generated transcriptomics datasets detailing RNA changes due to TDP-43 knockdown and M337V mutant overexpression.
• Enabled differential gene expression analysis to identify affected cellular pathways.
• Facilitated the study of non-coding RNAs and the construction of gene regulatory networks.

Conclusions:

• The generated data serve as a valuable resource for understanding TDP-43's role in motor neuron biology and NDDs.
• Analysis of these datasets can reveal critical cellular pathways disrupted by TDP-43 loss-of-function or mutation.
• Insights into coding and non-coding RNA interplay in TDP-43 related gene regulation can be gained.