Tdp-43 Toxicity
Tdp-43 Toxicity - Related Videos
13:31
Novel Atomic Force Microscopy Based Biopanning for Isolation of Morphology Specific Reagents against TDP-43 Variants in Amyotrophic Lateral Sclerosis
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Cited by 17 •
2015
Using atomic force microscopy in combination with biopanning technology we created a negative and positive biopanning system to acquire antibodies against disease-specific protein variants present in any biological material, even at low concentrations. We were successful in obtaining antibodies to TDP-43 protein variants involved in Amyotrophic Lateral Sclerosis.
07:07
Measuring Glucose Uptake in Drosophila Models of TDP-43 Proteinopathy
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Cited by 3 •
2021
Glucose uptake is increased in Drosophila motor neurons affected by TAR DNA binding protein (TDP-43) proteinopathy, as indicated by a FRET-based, genetically encoded glucose sensor.
07:14
Optogenetic Phase Transition of TDP-43 in Spinal Motor Neurons of Zebrafish Larvae
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2022
We describe a protocol to induce phase transition of TAR DNA-binding protein 43 (TDP-43) by light in the spinal motor neurons using zebrafish as a model.
08:57
High-throughput Yeast Plasmid Overexpression Screen
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Cited by 12 •
2011
Here we describe a plasmid overexpression screen in Saccharomyces cerevisiae, using an arrayed plasmid library and a high-throughput yeast transformation protocol with a liquid handling robot.
09:20
Perturbing Endothelial Biomechanics via Connexin 43 Structural Disruption
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Cited by 6 •
2019
Here, we present a mechanics-based protocol to disrupt the gap junction connexin 43 and measure the subsequent impact this has on endothelial biomechanics via observation of tractions and intercellular stresses.
FAQs
A key feature is the simultaneous loss of TDP-43 activity in the nucleus and emergence of harmful effects in the cytoplasm. Reduced nuclear function can disrupt RNA processing, while cytoplasmic accumulation and aggregation can damage cells through toxic gain-of-function effects. Considering both processes is important because neuronal injury may reflect interacting deficits rather than a single abnormal activity.
Phosphorylated or ubiquitinated aggregates provide molecular evidence that TDP-43 has undergone disease-associated changes. Their presence helps researchers track abnormal protein behavior alongside its relocation from the nucleus to the cytoplasm. Studying these aggregate forms can therefore connect visible cellular pathology with impaired RNA regulation and neuronal dysfunction in models of amyotrophic lateral sclerosis and frontotemporal dementia.
Neuronal injury can arise from two linked changes: the protein no longer performs its normal nuclear role, and abnormal material accumulates in the cytoplasm. The balance between these loss-of-function and toxic gain-of-function effects may influence cellular vulnerability. This framework helps explain why TDP-43 toxicity is investigated as a mechanism affecting neuronal maintenance, rather than only as an aggregation phenomenon.
Experimental models allow researchers to examine how TDP-43 leaves the nucleus, accumulates in the cytoplasm, and forms disease-associated aggregates. They can also be used to evaluate consequences for RNA processing and neuronal function. These observations help clarify molecular mechanisms and provide a basis for exploring biomarkers or interventions aimed at limiting aggregation and protecting vulnerable neurons.
The overview identifies three broad intervention goals: preventing abnormal aggregation, restoring TDP-43 localization, and protecting vulnerable neurons. These approaches target different stages of the pathology, from the formation of harmful protein assemblies to the loss of normal nuclear activity and subsequent cellular damage. Comparing them may help determine which aspect of the process is most suitable for treatment development.
TDP-43 toxicity links abnormal protein behavior to two major neurodegenerative disorders, amyotrophic lateral sclerosis and frontotemporal dementia. Its study brings together protein localization, aggregation, RNA processing, and neuronal function. This combination makes the topic useful for understanding disease mechanisms while also supporting research into biomarkers and treatments that could address cellular changes associated with vulnerable neurons.