https://wikimd.org/index.php?action=history&feed=atom&title=BatrachotoxinBatrachotoxin - Revision history2026-04-26T21:46:29ZRevision history for this page on the wikiMediaWiki 1.44.2https://wikimd.org/index.php?title=Batrachotoxin&diff=5896459&oldid=prevPrab: CSV import2024-06-11T04:07:45Z<p>CSV import</p>
<p><b>New page</b></p><div>[[File:Batrachotoxin-skeleton-based-on-xtal-3D-st.png|thumb|Batrachotoxin-skeleton-based-on-xtal-3D-st.png]] [[File:Batrachotoxin-based-on-xtal-3D-bs.png|thumb|left|Batrachotoxin-based-on-xtal-3D-bs.png]] '''Batrachotoxin''' is a potent [[neurotoxin]] and [[steroid]]al [[alkaloid]] found in certain species of [[frogs]], [[birds]], and [[beetles]]. It is one of the most toxic naturally occurring substances known and is primarily found in the skin of [[poison dart frogs]] of the genus ''[[Phyllobates]]'', such as ''[[Phyllobates terribilis]]''.<br />
<br />
==Chemical Structure and Properties==<br />
Batrachotoxin is a [[steroid]]al alkaloid with a complex structure that includes a [[pyrrole]] ring. Its molecular formula is C31H42N2O6. The toxin is highly lipophilic, allowing it to easily integrate into cell membranes.<br />
<br />
==Mechanism of Action==<br />
Batrachotoxin exerts its toxic effects by binding to and irreversibly opening [[voltage-gated sodium channels]] in [[nerve]] and [[muscle]] cells. This action prevents the channels from closing, leading to a continuous influx of [[sodium ions]] and resulting in persistent [[depolarization]] of the affected cells. This disrupts normal [[nerve signal]] transmission and can lead to [[paralysis]] and [[cardiac arrest]].<br />
<br />
==Sources==<br />
===Frogs===<br />
The primary source of batrachotoxin is the skin of certain [[poison dart frogs]], particularly those in the genus ''[[Phyllobates]]''. These frogs secrete the toxin as a defense mechanism against predators.<br />
<br />
===Birds===<br />
Batrachotoxin is also found in some species of [[birds]] from the genus ''[[Pitohui]]'' and ''[[Ifrita]]''. These birds acquire the toxin through their diet, which includes toxic [[beetles]].<br />
<br />
===Beetles===<br />
Certain species of [[beetles]] in the family [[Melyridae]] are known to contain batrachotoxin. These beetles are believed to be the original source of the toxin for both frogs and birds.<br />
<br />
==Toxicity==<br />
Batrachotoxin is extremely toxic, with an estimated [[lethal dose]] (LD50) of 2-7 µg/kg in humans. The toxin can cause severe [[cardiotoxicity]] and [[neurotoxicity]], leading to symptoms such as [[muscle paralysis]], [[respiratory failure]], and [[death]].<br />
<br />
==Uses==<br />
Due to its high toxicity, batrachotoxin has no known therapeutic uses. However, it is of interest in [[neurobiological research]] for studying the function of sodium channels and the mechanisms of [[neurotoxicity]].<br />
<br />
==Safety and Handling==<br />
Extreme caution is required when handling batrachotoxin. Protective equipment and proper laboratory protocols must be followed to prevent accidental exposure.<br />
<br />
==Related Pages==<br />
* [[Neurotoxin]]<br />
* [[Poison dart frog]]<br />
* [[Voltage-gated sodium channel]]<br />
* [[Phyllobates terribilis]]<br />
* [[Pitohui]]<br />
* [[Ifrita]]<br />
* [[Melyridae]]<br />
<br />
==Categories==<br />
[[Category:Neurotoxins]]<br />
[[Category:Steroidal alkaloids]]<br />
[[Category:Poison dart frogs]]<br />
[[Category:Bird toxins]]<br />
[[Category:Beetle toxins]]<br />
<br />
{{Neurotoxin-stub}}</div>Prab