Neurotoxins
Neurotoxins - Related Videos
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.
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.
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.
02:31
Recording of Induced Seizures through Electroencephalography in Freely Moving Rat Pups
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2025
The video demonstrates the recording of electroencephalogram (EEG) signals from seizure-induced rat pups. Take a freely moving pup implanted with electrodes connected to a data acquisition system. A neurotoxin is administered to induce epileptic seizures, and the resulting electrical bursting activity is monitored using the EEG signal.
FAQs
Neurotoxins can interfere with neuronal signaling at several molecular points rather than through one universal pathway. They may block ion channels, change neurotransmitter release, overstimulate receptors, inhibit receptor activity, or impair axonal transport. These disruptions can weaken synaptic communication and, when sufficiently severe, compromise neuronal survival. The affected target helps determine the resulting pattern of dysfunction.
Blocking an ion channel or altering neurotransmitter release can disturb the processes that support communication between neurons. These mechanisms are pharmacologically useful because they connect a toxin’s molecular target with a measurable change in synaptic function. Comparing them helps researchers determine whether dysfunction primarily involves channel activity, chemical signaling, or both.
Receptor overstimulation and receptor inhibition disturb signaling in opposite directions. Excessive receptor activity can drive abnormally strong neuronal responses, whereas reduced receptor activity can suppress or weaken normal communication. Studying both patterns helps pharmacologists relate receptor behavior to neuronal dysfunction and distinguish excessive signaling from insufficient signaling when interpreting neurotoxin effects.
Axonal transport supports movement along the neuron and is therefore important for maintaining neuronal function. When a neurotoxin impairs this process, communication within the neuron can be disrupted even if the initial effect does not occur at the synapse. This mechanism broadens pharmacological analysis beyond synaptic signaling and helps explain effects that may threaten neuronal survival.
Pharmacology uses neurotoxins as mechanistic probes because their actions can reveal how neurons signal and respond to injury. Studying these disruptions supports the development of diagnostic tools and treatments by linking molecular effects with changes in neuronal function. Neurotoxin research therefore contributes to both basic investigation of the nervous system and translational pharmacology.
Controlled use of botulinum neurotoxin illustrates how a toxic mechanism can be adapted for treatment. Its effects can be applied to reduce abnormal muscle activity and pain, showing that pharmacological value depends on controlled use and a defined therapeutic objective. This example connects neurotoxin research with treatment development while emphasizing the importance of mechanism-focused application.