Tetrodotoxin Application
Tetrodotoxin Application - Related Videos
04:31
Testing Monosynaptic Connections Using Tetrodotoxin and Tetrodotoxin-Resistant Sodium Channels
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2025
This video demonstrates testing monosynaptic connections using a transgenic fly. The fly has tetrodotoxin-resistant sodium channels and red light-activated channels in its presynaptic neurons, which are optogenetically excited to transmit signals to postsynaptic neurons.
03:20
Microinjection of Tetrodotoxin into the Brain of an Awake Female Rat to Inhibit Ovulation
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2025
Source: Silva, C. et al. Unraveling the Role of Discrete Areas of the Rat Brain in the Regulation of Ovulation through Reversible Inactivation by Tetrodotoxin Microinjections. J. Vis. Exp. (2020)This video demonstrates the protocol for microinjection of tetrodotoxin (TTX) into the hypothalamus of a freely moving rat to transiently inhibit neuronal activity, suppress gonadotropin-releasing hormone secretion, and prevent ovulation.
09:55
Examining Monosynaptic Connections in Drosophila Using Tetrodotoxin Resistant Sodium Channels
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Cited by 8 •
2018
This article features a method to test the monosynaptic connections between neurons by employing tetrodotoxin and the tetrodotoxin-resistant sodium channel, NaChBac.
11:04
Unraveling the Role of Discrete Areas of the Rat Brain in the Regulation of Ovulation through Reversible Inactivation by Tetrodotoxin Microinjections
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2020
This protocol describes the construction of a low-cost microinjection system, its stereotaxic implantation into deep-brain structures and the procedure for timed microinjections of tetrodotoxin in awake and unrestrained rats. The goal is to reveal the participation of hypothalamic structures in the regulation of ovulation by inhibiting their neural activity.
FAQs
The blockade suppresses electrical signaling without directly destroying the affected excitable cell, allowing researchers to compare responses during neural inhibition and after signaling returns. This distinction is important when interpreting changes in immune activity, inflammation, or pain, because an observed effect can be linked more specifically to loss of neural input rather than irreversible injury to the experimental system.
Tetrodotoxin binds to the outer pore of voltage-gated sodium channels and prevents sodium influx through the channel. Without that inward current, the membrane cannot depolarize normally, so action-potential propagation stops. This channel-level action provides a way to interrupt electrical communication in excitable cells while preserving the broader cellular system for subsequent analysis.
Tetrodotoxin application targets neural signaling rather than directly acting on immune cells or pathogens. Investigators can therefore examine whether a measured inflammatory or host response changes when neuronal activity is interrupted. This comparison helps distinguish effects caused by neuroimmune communication from effects produced directly by immune mechanisms, microbial processes, or interactions between them.
Researchers introduce a controlled neural blockade and then assess the relevant immune, inflammatory, pain-related, or host-pathogen response under reduced electrical signaling. Because the effect is reversible, experimental designs can compare conditions with signaling present and inhibited. The resulting contrast helps identify outcomes that depend on neuronal activity rather than merely coinciding with it.
This approach is useful when researchers want to test whether neuronal activity influences immune responses or inflammation. Applying the blockade provides an experimental comparison in which neural input is reduced while the surrounding biological context remains available for observation. Changes between control and inhibited conditions can reveal the contribution of neuroimmune communication to the response being studied.
In infection research, neural blockade can help determine whether neuronal signaling contributes to host interactions with pathogens. Investigators can examine responses with electrical communication inhibited and compare them with responses in which signaling remains active. This design helps separate neural contributions from processes driven directly by the immune system or by the microbe, clarifying mechanisms of host response.