Feb 17, 2020

Induction Of Chronic Stress Reveals An Interplay Of Stress Granules And TDP-43 Pathological Aggregates In Human ALS Fibroblasts And iPSC-Neurons

bioRxiv
Antonia RattiClaudia Colombrita

Abstract

Amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD) are fatal neurodegenerative diseases characterized by the presence of neuropathological aggregates of phosphorylated TDP-43 (P-TDP-43). The RNA-binding protein TDP-43 is also a component of stress granules (SG), cytoplasmic foci forming to arrest translation under sub-lethal stress conditions. Although commonly considered as distinct structures, a link between SG and pathological TDP-43 inclusions may occur despite evidence that TDP-43 pathology directly arises from SG is still under debate. Primary fibroblasts and iPSC-derived neurons (iPSC-N) from ALS patients carrying mutations in TARDBP (n=3) and C9ORF72 (n=3) genes and from healthy controls (n=3) were exposed to oxidative stress by sodium arsenite. SG formation and cell response to stress was evaluated and quantified by immunofluorescence and electron microscopy analyses. We found that, not only an acute, but also a chronic oxidative insult, better mimicking a persistent condition of stress as in neurodegeneration, is able to induce SG formation in primary fibroblasts and iPSC-N. Importantly, only upon chronic stress, we observed TDP-43 recruitment into SG and the formation of distinct P-TDP-43 aggregate...Continue Reading

  • References
  • Citations

References

  • We're still populating references for this paper, please check back later.
  • References
  • Citations

Citations

  • This paper may not have been cited yet.

Mentioned in this Paper

Evaluation
Amyotrophic Lateral Sclerosis
Protein TDP-43
Structure of Suprageniculate Nucleus
Size
Induced Pluripotent Stem Cells
Focal
Neurodegenerative Disorders
TARDBP
Poisoning/Injury

Related Feeds

Astrocytes and Neurodegeneration

Astrocytes are important for the health and function of the central nervous system. When these cells stop functioning properly, either through gain of function or loss of homeostatic controls, neurodegenerative diseases can occur. Here is the latest research on astrocytes and neurodegeneration.

Autophagy & Model Organisms

Autophagy is a cellular process that allows degradation by the lysosome of cytoplasmic components such as proteins or organelles. Here is the latest research on autophagy & model organisms

ALS: Therapies

Amyotrophic Lateral Sclerosis (ALS), also known as motor neuron disease, is associated with the death of neurons that control voluntary muscles. Discover the latest research on ALS therapies here.

Autophagy & Disease

Autophagy is an important cellular process for normal physiology and both elevated and decreased levels of autophagy are associated with disease. Here is the latest research.

ALS

Amyotrophic Lateral Sclerosis (ALS), also known as motor neuron disease, is associated with the death of neurons that control voluntary muscles. Discover the latest research on ALS here.

ALS - Phenotypes

Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disorder characterized by muscle weakness. Here is the latest research investigating phenotypes associated with this genetically heterogeneous disorder.

BioRxiv & MedRxiv Preprints

BioRxiv and MedRxiv are the preprint servers for biology and health sciences respectively, operated by Cold Spring Harbor Laboratory. Here are the latest preprint articles (which are not peer-reviewed) from BioRxiv and MedRxiv.

ALS - Pathogenic Mechanisms

Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disorder characterized by muscle weakness. Here is the latest research investigating pathogenic mechanisms that underlie this genetically heterogeneous disorder.