2004
DOI: 10.1002/ana.20098
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Clinical impact of antibody formation to botulinum toxin A in children

Abstract: We studied the clinical impact of neutralizing antibodies to botulinum toxin A that occurred during long-term treatment of children between 1993 and 2001. Antibodies were found in high titers in 35 of 110 (31.8%) samples from individual patients. Antibody formation correlated with secondary nonresponse (p < 0.001). The most significant risk factors for antibody formation were the frequency of treatments (p = 0.0001) and the injection of a higher weight-adapted maximum dose per treatment (p = 0.001).

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Cited by 63 publications
(46 citation statements)
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“…Recently, a modified constraint-induced therapy [21,22] has yielded promising results as a therapy with hemiplegic adolescents and adults with CP and combination of these two modalities remains to be assessed. Further, repeated injections beginning at the age of 3 may be expensive or may lead to non-responsiveness due to the formation of antibodies [23], thus emphasizing the need to combine the BTXA treatment with other methods (i.e. splints, orthoses, casts).…”
Section: Discussionmentioning
confidence: 99%
“…Recently, a modified constraint-induced therapy [21,22] has yielded promising results as a therapy with hemiplegic adolescents and adults with CP and combination of these two modalities remains to be assessed. Further, repeated injections beginning at the age of 3 may be expensive or may lead to non-responsiveness due to the formation of antibodies [23], thus emphasizing the need to combine the BTXA treatment with other methods (i.e. splints, orthoses, casts).…”
Section: Discussionmentioning
confidence: 99%
“…However, the lack of tachyphylaxis in our study and in the other published repeated dose studies [22,23] suggests that NAB formation is not a serious problem. Risk factors for the formation of NAB are a high BTX-A dose and short injection intervals [25]. For the detrusor, relatively long injection intervals are important in reducing the risk of NAB formation.…”
Section: Discussionmentioning
confidence: 99%
“…In children undergoing BoNT treatment in the 90s up to 30% were reported to develop antibodies. 35 Although higher dosages per session have recently been administered to children with CP, secondary non-response due to the presence of antibodies is no longer experienced as a clinically relevant problem due to the use of reformulated BoNT. 21,24 This is in line with reports that have demonstrated reduced antigenicity of the reformulated preparation in adults with cervical dystonia.…”
Section: Section 8 Botulinum Toxin Therapy Continuation or Discontinumentioning
confidence: 99%