Bacterial Neurotoxins
Bacterial Neurotoxins - Related Videos
15:05
Functional Evaluation of Biological Neurotoxins in Networked Cultures of Stem Cell-derived Central Nervous System Neurons
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Cited by 9 •
2015
A custom protocol is described to differentiate mouse ES cells into defined populations of highly pure neurons exhibiting functioning synapses and emergent network behavior. Electrophysiological analysis demonstrates the loss of synaptic transmission following exposure to botulinum neurotoxin serotypes /A-/G and tetanus neurotoxin.
12:25
Isolation and Quantification of Botulinum Neurotoxin From Complex Matrices Using the BoTest Matrix Assays
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Cited by 5 •
2014
The BoTest Matrix botulinum neurotoxin (BoNT) detection assays rapidly purify and quantify BoNT from a range of sample matrices. Here, we present a protocol for the detection and quantification of BoNT from both solid and liquid matrices and demonstrate the assay with BOTOX, tomatoes, and milk.
10:30
A High-throughput-compatible FRET-based Platform for Identification and Characterization of Botulinum Neurotoxin Light Chain Modulators
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Cited by 4 •
2013
The botulinum neurotoxin type A light chain (BoNT/A LC) is a metalloprotease that enters motor neurons, cleaves its substrate SNAP-25, and disrupts neurotransmission, thereby resulting in flaccid paralysis. Utilizing a high-throughput-compatible FRET-based assay, large libraries of small molecules can be screened for their impact on BoNT/A LC enzymatic activity.
14:10
A High Content Imaging Assay for Identification of Botulinum Neurotoxin Inhibitors
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Cited by 3 •
2014
Botulinum neurotoxin is one of the most potent toxins among Category-A biothreat agents, yet a post-exposure therapeutic is not available. The high content imaging approach is a powerful methodology for identifying novel inhibitors as it enables multiparameter screening using biologically relevant motor neurons, the primary target of this toxin.
05:21
Bacterial Transformation - Student Protocol
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2019
Bacterial Transformation ExpandIMPORTANT: In addition to wearing the appropriate personal protective equipment, be sure to take care to keep your face away from suspension cultures, and to avoid inhaling reagents. Do not touch your face while performing the experiment. Always wash your hands before and after every experiment. When you are ready to safely begin, check to make sure you have a tube or tubes of competent E. coli cells in your ice bucket. Then, transfer 50 µL from one of these tubes...
FAQs
The outcome depends on which neural function a toxin disrupts. Interference with neurotransmitter release at synapses can impair communication between nerve cells, whereas altered ion-channel activity can disturb electrical signaling. Toxins that enter cells and damage neurons may produce more direct cellular injury. These target differences help explain why bacterial neurotoxins can cause paralysis, sensory disturbances, or other neurological symptoms.
Neurotransmitter release allows neurons to communicate across synapses, the junctions between nerve cells. When a toxin blocks this process, affected neural signals cannot pass normally even if the cells remain present. Studying this mechanism connects a molecular event to impaired nervous-system function and helps explain how toxin exposure can result in paralysis or other neurological changes.
Ion channels regulate electrical activity in neurons, so changing their activity can disturb signaling without necessarily requiring direct structural injury to the cell. By contrast, a toxin that enters cells and damages neurons affects the cells themselves. This distinction matters because the site and type of disruption influence which tissues are affected and what neurological symptoms develop.
Their specific molecular targets make bacterial neurotoxins useful for investigating nervous-system physiology and host-pathogen interactions. Researchers can relate toxin activity to disrupted synaptic communication, altered ion-channel behavior, or neuronal damage, then apply that knowledge to toxin-mediated disease. This work supports medical efforts to recognize, diagnose, and treat neurological effects associated with bacterial infections.
Understanding how these toxins affect neural tissues helps connect neurological symptoms with a possible toxin-mediated cause. Knowledge of their targets and effects can support diagnosis, while the same mechanistic information informs treatment strategies. Because the consequences vary with the affected tissue and molecular process, studying the toxin provides context for interpreting paralysis, sensory disturbances, and related symptoms.
Some bacterial neurotoxins can inform the development of neurotoxin-based medicines when their effects are carefully controlled. Their defined actions on neural communication or other cellular targets provide a basis for considering therapeutic use rather than viewing them only as causes of disease. Biology research is therefore important for determining how toxin mechanisms might be applied safely and deliberately in medicine.