Persistence of Botulinum Neurotoxin a Subtypes 1-5 in Primary Rat Spinal Cord Cells
Overview
Affiliations
Botulinum neurotoxins (BoNTs) are the most poisonous substances known and cause the severe disease botulism. BoNTs have also been remarkably effective as therapeutics in treating many neuronal and neuromuscular disorders. One of the hallmarks of BoNTs, particularly serotype A, is its long persistence of 2-6 months in patients at concentrations as low as fM or pM. The mechanisms for this persistence are currently unclear. In this study we determined the persistence of the BoNT/A subtypes 1 through 5 in primary rat spinal neurons. Remarkably, the duration of intracellular enzymatic activity of BoNT/A1, /A2, /A4 and /A5 was shown to be at least 10 months. Conversely, the effects of BoNT/A3 were observed for up to ∼5 months. An intermittent dosing with BoNT/E showed intracellular activity of the shorter acting BoNT/E for 2-3 weeks, followed by reoccurrence and persistence of BoNT/A-induced SNAP-25 cleavage products.
Cryo-EM structure of the botulinum neurotoxin A/SV2B complex and its implications for translocation.
Khanppnavar B, Leka O, Pal S, Korkhov V, Kammerer R Nat Commun. 2025; 16(1):1224.
PMID: 39934119 PMC: 11814414. DOI: 10.1038/s41467-025-56304-z.
Potency Evaluations of Recombinant Botulinum Neurotoxin A1 Mutants Designed to Reduce Toxicity.
Viravathana P, Tepp W, Bradshaw M, Przedpelski A, Barbieri J, Pellett S Int J Mol Sci. 2024; 25(16).
PMID: 39201641 PMC: 11355004. DOI: 10.3390/ijms25168955.
The Degradation of Botulinum Neurotoxin Light Chains Using PROTACs.
Tsai Y, Kozar L, Mawi Z, Ichtchenko K, Shoemaker C, McNutt P Int J Mol Sci. 2024; 25(13).
PMID: 39000579 PMC: 11242356. DOI: 10.3390/ijms25137472.
Embracing the Versatility of Botulinum Neurotoxins in Conventional and New Therapeutic Applications.
Rasetti-Escargueil C, Palea S Toxins (Basel). 2024; 16(6).
PMID: 38922155 PMC: 11209287. DOI: 10.3390/toxins16060261.
A DARPin promotes faster onset of botulinum neurotoxin A1 action.
Leka O, Wu Y, Zanetti G, Furler S, Reinberg T, Marinho J Nat Commun. 2023; 14(1):8317.
PMID: 38110403 PMC: 10728214. DOI: 10.1038/s41467-023-44102-4.