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Botulinum toxin

Botulinum toxin A
Cartoon representation of Botulinum toxin. PDB entry 3BTA
Clinical data
Routes of
administration
IM (approved), SC, intradermal, into glands
ATC code
Legal status
Legal status
Identifiers
CAS Number
DrugBank
ChemSpider
  • none
Chemical and physical data
Formula C6760H10447N1743O2010S32
Molar mass 150 kg/mol (150,000 g/mol)
 NYesY (what is this?)  
Bontoxilysin
Identifiers
EC number 3.4.24.69
Databases
IntEnz IntEnz view
BRENDA BRENDA entry
ExPASy NiceZyme view
KEGG KEGG entry
MetaCyc metabolic pathway
PRIAM profile
PDB structures RCSB PDB PDBe PDBsum
Gene Ontology AmiGO / EGO

Botulinum toxin (BTX) is a neurotoxic protein produced by the bacterium Clostridium botulinum and related species. It prevents the release of the neurotransmitter acetylcholine from axon endings at the neuromuscular junction and thus causes flaccid paralysis. Infection with the bacterium causes the disease botulism. The toxin is also used commercially in medicine, cosmetics, and research.

Botulinum is the most acutely lethal toxin known, with an estimated human median lethal dose (LD50) of 1.3–2.1 ng/kg intravenously or intramuscularly and 10–13 ng/kg when inhaled. The U.S. Food and Drug Administration requires a boxed warning stating that when locally administered the toxin may spread from the injection site to other areas of the body, causing botulism. The warning was the result of deaths associated with its uses.

There are seven types of botulinum toxin, named type A–G. Type A and B are capable of causing disease in humans, and are also used commercially and medically. Types C–G are less common; types E and F can cause disease in humans, while the other types cause disease in other animals. Botulinum toxin types A and B are used in medicine to treat various muscle spasms and diseases characterized by overactive muscle. The commercial form is marketed under the brand name Botox, among others. Botox is made by Allergan.

Botulinum toxin is used to treat a number of problems.

Botulinum toxin is used to treat a number of disorders characterized by overactive muscle movement, including post-stroke spasticity, post-spinal cord injury spasticity, spasms of the head and neck,eyelid,vagina, limbs, jaw, and vocal cords. Similarly, botulinum toxin is used to relax clenching of muscles, including those of the oesophagus,jaw,lower urinary tract and bladder, or clenching of the anus which can exacerbate anal fissure. It may also be used for improper eye alignment.


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Wikipedia

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