NCT02427646

Kinematic-guided BoNT-A Treatment for ET and PD Tremor

Use of Kinematic Assessment of Hand Tremor Pre- and Post- Treatment With Botulinum Toxin Type A in Essential Tremor and Parkinson Disease

• Status: Unknown
• Phase: Phase 2
• Study type: Interventional
• Enrollment: 54 (actual)
• Sponsor: Western University, Canada · Academic / Other
• Sex: All
• Age: 18 Years – 80 Years
• Healthy volunteers: Not accepted

Summary

The present study attempts to fill a critical knowledge gap of BoNT A in tremor management by studying the efficacy of IncobotulinumtoxinA (Xeomin®) injection for hand tremor in essential tremor and idiopathic Parkinson disease using data regarding composition of tremor obtained through sophisticated, yet clinically accessible multi-sensor based kinematic information.

Detailed description

Current pharmacological agents used to treat Parkinson disease (PD) tremor and essential tremor (ET) provide suboptimal benefit and are commonly associated with significant adverse effects. Botulinum toxin type A (BoNT-A) has been shown to be effective for wrist tremor though functionally bothersome muscle weakness frequently occurs. This is the longest study to date demonstrating that BoNT-A therapy coupled with kinematic guidance can provide efficacious outcomes for upper limb tremor with minimized unwanted weakness. A total of 28 PD and 24 ET participants with bothersome, disabling tremor, received six serial BoNT-A treatments every 16 weeks starting at week 0 with a follow-up visit 6 weeks following a treatment, totaling 96 weeks. Clinical scales, including Fahn-Tolosa-Marin tremor rating scale (FTM), and sensor-based tremor assessments were conducted at each visit. Kinematics was utilized to identify which arm muscles contributed to the tremulous movements and the experienced injector used clinical expertise in determining BoNT-A dosages. Following BoNT-A treatment, clinical ratings of tremor severity and functional ability (FTM) showed significant improvements following the first treatment which was maintained up to week 96 in PD and ET. Kinematics detected a significant reduction in PD and ET tremor amplitudes by 70% and 76% over the treatment course, respectively. By objectively distinguishing tremulous muscles and tremor severity, adverse effects were limited to mild perceived weakness by participants in injected muscles during follow-ups. Following the fourth treatment, BoNT-A dosages in flexor and extensor wrist muscles and biceps were reduced for those experiencing residual weakness which ultimately did not interfere with tremor relief or arm function. Kinematics is an objective method that can aid clinicians in assessing and determining optimal BoNT-A parameters to alleviate both PD and ET tremor. BoNT-A injections are tolerable and effective when focal therapy regimens are determined and optimized kinematically over a long-term

Conditions

• Tremor

Interventions

Type	Name	Description
DRUG	BoNT-A	A serotype of botulinum toxins that has specificity for cleavage of SYNAPTOSOMAL-ASSOCIATED PROTEIN 25 (SNAP-25). BoNT-A's pharmacological action is to inhibit the release of acetylcholine from the neuromuscular junction. BoNT-A peripherally applied using optimal parameters by intramuscular injections to treat tremor in the most bothersome upper extremity every 16 weeks over 96 weeks. The study will be extended for those participants who benefited and will receive treatment every 12 weeks over 96 weeks. BoNT-A dose will range from 50-300 U per arm.

Timeline

• Start date: 2011-10-01
• Primary completion: 2015-04-01
• Completion: 2020-06-01
• First posted: 2015-04-28
• Last updated: 2019-08-20
• Results posted: 2019-08-20