G Kranz1, T Sycha, B Voller, G S Kranz, P Schnider, E Auff. 1. Department of Neurology, Medical University of Vienna, Währinger Gürtel 18-20, A-1090 Vienna, Austria. gottfried.kranz@meduniwien.ac.at
Abstract
BACKGROUND: Complete secondary therapy failure due to antibodies against botulinum toxin A (BoNT/A-ABs) may raise extensive treatment difficulties. We tested whether neutralizing BoNT/A-ABs can be detected in dystonic patients with good clinical responses to botulinum toxin A (BoNT/A) treatment. METHODS: We used the ninhydrin sweat test (NST) and the mouse diaphragm test (MDT) in 28 subjects. Of 119 dystonic patients who responded well to BoNT/A, we randomly selected 14 and compared the results of the NST and MDT with 14 healthy controls. RESULTS: Higher BoNT/A-AB titers correlated significantly with smaller anhidrotic areas. We found seven patients with borderline antibody (AB) values (MDT 0.4 to 0.8 mU/mL) with significantly smaller anhidrotic areas (NST) compared with healthy controls and AB-negative patients. Risk factors for smaller anhidrotic areas were short injection intervals but not prolonged exposure to BoNT/A or high injection doses. CONCLUSIONS: These data demonstrate that >40% of dystonic patients who respond well to botulinum toxin A (BoNT/A) show partial nonresponsiveness on the ninhydrin sweat test and have low titers of neutralizing BoNT/A antibodies.
BACKGROUND: Complete secondary therapy failure due to antibodies against botulinum toxin A (BoNT/A-ABs) may raise extensive treatment difficulties. We tested whether neutralizing BoNT/A-ABs can be detected in dystonicpatients with good clinical responses to botulinum toxin A (BoNT/A) treatment. METHODS: We used the ninhydrin sweat test (NST) and the mouse diaphragm test (MDT) in 28 subjects. Of 119 dystonicpatients who responded well to BoNT/A, we randomly selected 14 and compared the results of the NST and MDT with 14 healthy controls. RESULTS: Higher BoNT/A-AB titers correlated significantly with smaller anhidrotic areas. We found seven patients with borderline antibody (AB) values (MDT 0.4 to 0.8 mU/mL) with significantly smaller anhidrotic areas (NST) compared with healthy controls and AB-negative patients. Risk factors for smaller anhidrotic areas were short injection intervals but not prolonged exposure to BoNT/A or high injection doses. CONCLUSIONS: These data demonstrate that >40% of dystonicpatients who respond well to botulinum toxin A (BoNT/A) show partial nonresponsiveness on the ninhydrin sweat test and have low titers of neutralizing BoNT/A antibodies.
Authors: Maria Fiorella Contarino; Joost Van Den Dool; Yacov Balash; Kailash Bhatia; Nir Giladi; Johannes H Koelman; Annemette Lokkegaard; Maria J Marti; Miranda Postma; Maja Relja; Matej Skorvanek; Johannes D Speelman; Evelien Zoons; Joaquim J Ferreira; Marie Vidailhet; Alberto Albanese; Marina A J Tijssen Journal: Front Neurol Date: 2017-02-24 Impact factor: 4.003
Authors: Sebastian Torres; Mark Hamilton; Elena Sanches; Polina Starovatova; Elena Gubanova; Tatiana Reshetnikova Journal: Clin Cosmet Investig Dermatol Date: 2013-12-18