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- W3204696140 abstract "All the available botulinum type A neurotoxins for clinical uses are of A1 subtype. We developed a subtype A2 low molecular weight (150kD) neurotoxin (A2NTX), with less spread and faster entry into the motor nerve terminal than A1 in vitro and in vivo. Preliminary clinical studies showed its efficacy superior to A1 toxins. We conducted an open study exploring its safety and tolerability profile in comparison with A1LL (onabotulinumtoxinA) and low molecular weight (150kD) A1 neurotoxin (A1NTX). Those who had been using A1LL (n=90; 50-360 mouse LD50 units) or A1NTX (n=30; 50-580 units) were switched to A2NTX (n=120; 25-600 units) from 2010 till 2018 (number of sessions ~ 27, cumulative doses ~11,640 units per patient). Adverse events for A2NTX included weakness (n=1, ascribed to alcoholic polyneuropathy), dysphagia (1), local weakness (4), spread to other muscles (1), whereas those for A1LL or A1NTX comprised weakness (n=2, A1NTX), dysphagia (8), ptosis (6), local weakness (7) and spread to other muscles (15). After injections, 89 out of 120 patients preferred A2NTX to A1 for the successive sessions. The present study demonstrated that A2NTX had the clinical safety up to the dose of 500 units, and was well tolerated compared to A1 toxins." @default.
- W3204696140 created "2021-10-11" @default.
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- W3204696140 date "2021-10-07" @default.
- W3204696140 modified "2023-09-24" @default.
- W3204696140 title "Clinical Safety and Tolerability of A2NTX, a Novel Low Molecular Weight Neurotoxin Derived From Botulinum Toxin Subtype A2, in Comparison with Subtype A1 Toxins" @default.
- W3204696140 doi "https://doi.org/10.20944/preprints202110.0121.v1" @default.
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