Conversion to Dysport in CD

June 29, 2022 updated by: Mandar Jog, Western University, Canada

Conversion and Optimization of Dysport for Cervical Dystonia

The first line of therapy for cervical dystonia patients is botulinum toxin injections, however injection parameter determination and optimization are challenging for physicians to do. In addition, some patients receiving this treatment long-term experience short duration of relief. Thus, Dysport (Ipsen Biopharmaceuticals), another BoNT-A formulation, may increase the duration of clinical benefit. The objective of this study is to compare the wearing off time of their original BoNT-A formulation (same injection parameters for at least 3 cycles) and the optimized treatment of Dysport (after 2 injection cycles). Ideally, the clinical benefits should last 2.5 - 3 months as injections are administered every 3 months. Conversion to Dysport will be conducted and optimization of Dysport dosing will be done using our sensor-technology assessment. It is unclear whether there are differences in the neurophysiological effects between BoNT-A formulations, such as blocking spinal afferent signals from proprioceptive mechanoreceptors of the injected muscles contributing to CD or the modulation of cortical activity [8]. The underlying pathophysiology of impaired motor control in CD is theorized to be caused by abnormal somatosensory processing that affects proprioceptive and tactile function [8]. By altering the processing of proprioceptive signals from the muscles to the cortical somatosensory-motor areas, proprioceptive perception can be modulated and possibly normalize activity of the somatosensory-motor areas in CD. Thus, it is hypothesized that BoNT-A may indirectly modulate these cortical pathways and Dysport may have a longer modulatory effect to produce a longer lasting clinical response.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Active, not recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
33

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Canada
    • Ontario
      • London, Ontario, Canada, N6A 5A5
        • London Health Sciences Centre

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years to 85 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Patients with cervical dystonia
  • Patients experiencing early waning off (benefit for up to 8 weeks) of their current BoNT-A treatment (stable for at least 3 treatments)
  • Only those that want to switch to Dysport will be included.
  • No prior exposure to Dysport
  • Able to come for multiple visits
  • Patient's injection parameters are stable for ≥3 cycles
  • Patient can provide written consent

Exclusion Criteria:

  • Unable to come for study visits

    1. Receiving BoNT-A for other indications (e.g. upper limb tremor)
    2. if you have a history of seizures.
    3. Pregnancy or Nursing: If you are pregnant then you ARE NOT ELIGIBLE FOR THIS STUDY. Please notify the research team if you are presently pregnant or if you are attempting to become pregnant or if you become pregnant at any time during the course of the study. A researcher will ask you about pregnancy at every study visit. If you are nursing, you ARE NOT ELIGIBLE FOR THIS STUDY. Please notify the researcher. Results from a pregnancy test will confirm your pregnancy status.
    4. Other Muscle/Nerve diseases: If you have a disease called Myasthenia Gravis or Amyotrophic Lateral Sclerosis (ALS or Lou Gehrig's disease) then you ARE NOT ELIGIBLE FOR THIS STUDY. Please notify the research team if you have these conditions.
    5. Previous side effects to botulinum toxin: If you have had a previous allergic reaction or side effect to botulinum toxin then you MAY NOT BE ELIGIBLE FOR THIS STUDY. Pease notify the research team if you have had a previous reaction/side effects from injection of botulinum toxin.
    6. Myotomy or denervation surgery: If you have had previous surgery for a myotomy or denervation of the neck or shoulder region then you ARE NOT ELIGIBLE FOR THIS STUDY. Please notify the research team if you have ever had these surgeries.
    7. allergy to cow's milk protein

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Other: Dysport
Single arm study, all participants will receive Dysport injections
Drug: Dysport Injectable Product
Dysport injections optimized using kinematics
Other Names:
  • abobotulinumtoxinA

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
waning effect
Time Frame: within 12 weeks of treatment
telephone call report of when participant perceives benefit of treatment is wearing off
within 12 weeks of treatment

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
objective measures of CD severity
Time Frame: 4-weeks and 12-weeks post-treatment
Kinematic sensor technology is used to measure CD symptoms (neck pulling and/or tremor). Sensors coupled with computer-assisted analysis can measure degrees of deviation from neutral head/neck position and angular root mean square tremor/dystonic jerks amplitude in each plane of motion (vertical, lateral, rotational).
4-weeks and 12-weeks post-treatment
changes in TMS measures
Time Frame: 4-weeks and 12-weeks post-treatment
changes in brain activity (inhibitory and excitatory pathways) using paired pulse TMS. Using established techniques
4-weeks and 12-weeks post-treatment
visual-motor performance
Time Frame: 4-weeks and 12-weeks post-treatment
speed, reaction time and accuracy in completing upper limb target reaching choice tasks using a robotic haptic device
4-weeks and 12-weeks post-treatment

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Western University, Canada

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
June 1, 2020

Primary Completion (Anticipated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
October 1, 2022

Study Completion (Anticipated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
October 1, 2022

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
February 12, 2020

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
February 12, 2020

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
February 17, 2020

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
July 5, 2022

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 29, 2022

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
June 1, 2022

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 115308

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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