Botulinum neurotoxin-A does not spread to distant muscles after intragastric injection: A double-blind single-fiber electromyography study.
The purpose of this study was to perform a careful neurophysiological examination to identify subclinical signs of botulinum toxin spread distant to the injection site following intragastric injection for obesity treatment. Single-fiber electromyography of extensor digitorum communis and repetitive stimulation of abductor digiti minimi were performed before and 8 days after multiple intragastric injections of botulinum toxin A (Botox, 200 U per patient) or placebo. The study was performed in a randomized double-blind fashion. No patient in either group displayed results indicative of neuromuscular dysfunction either before or after the treatment. No significant change in muscle jitter was observed when comparing baseline with the after-treatment evaluation in either group, and no significant differences between groups were observed. After intragastric botulinum toxin injection no subclinical sign of distant spread was observed.
Osio
Maurizio
M
Clinica Neurologica, Università degli Studi di Milano, Luigi Sacco Hospital, via G.B. Grassi, 74, (IT)-20157 Milan, Italy. maurizio.osio@unimi.it
Mailland
Enrico
E
Muscia
Francesco
F
Nascimbene
Caterina
C
Vanotti
Alessandra
A
Bana
Cristina
C
Corsi
Fabio
F
Foschi
Diego
D
Mariani
Claudio
C
D000293:Adolescent; D000328:Adult; D000368:Aged; D019274:Botulinum Toxins, Type A / Q000494:pharmacology* / Q000627:therapeutic use; D004311:Double-Blind Method; D004576:Electromyography; D005260:Female; D006801:Humans; D007267:Injections; D008297:Male; D008875:Middle Aged; D018482:Muscle, Skeletal / Q000187:drug effects*; D009460:Neurologic Examination; D009498:Neurotoxins / Q000494:pharmacology / Q000627:therapeutic use; D009765:Obesity / Q000628:therapy*; D018579:Patient Selection; D016896:Treatment Outcome
D009498:Neurotoxins; D019274:Botulinum Toxins, Type A