- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05195775
Tadalafil as Adjuvant Therapy for DMD
January 30, 2024 updated by: University of Florida
Tadalafil as an Adjuvant to Therapy for Duchenne Muscular Dystrophy
This project will assess the vascular responsiveness in leg muscles of boys with Duchenne muscular dystrophy (DMD) to one single dose of tadalafil, a common vasodilator drug, using non-invasive techniques (MRI or Doppler ultrasound) and exercise testing.
These findings will provide proof of concept for a subsequent intervention study to demonstrate efficacy of longer-term tadalafil to counter sympathetic vasoconstriction and slow disease progression in DMD.
It will also inform whether a group of patients do not respond to the drug.
Study Overview
Status
Recruiting
Conditions
Intervention / Treatment
Detailed Description
This project will target up to 25 ambulatory boys with DMD aged 7-13 years.
Because the vascular impact of tadalafil is immediate, we will confirm that the drug target is valid target in lower extremities by assessing the change in post-exercise microvascular perfusion using Blood Oxygen Level-Dependent (BOLD) MRI or change in post-exercise hyperemia using Doppler ultrasonography.
We will also assess the functional impact of the drug through exercise testing.
Patients will be randomized to undergo the above-mentioned assessments with or without the study drug on two separate visits.
Time function tests, MRI-based fat fraction and inflammation measurements will also be obtained in all patients, thus characterizing disease severity and provide a sampling of information on whether a subset of patients do not respond to the drug.
This information may be used to inform future trials as to the appropriate target population for PDE5i as well as account for potential failures in a previously published phase 3 clinical trial.
Study Type
Interventional
Enrollment (Estimated)
25
Phase
- Phase 2
- Phase 3
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
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Florida
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Gainesville, Florida, United States, 32610
- Recruiting
- University of Florida
-
Contact:
- Tanja Taivassalo
- Phone Number: 352-294-8748
- Email: ttaivassalo@ufl.edu
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Principal Investigator:
- Tanja Taivassalo
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-
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
Ages Eligible for Study
7 years to 13 years (Child)
Accepts Healthy Volunteers
No
Description
Inclusion Criteria:
- Diagnosis of DMD confirmed by 1) clinical history with features before the age of five, 2) physical examination, 3) elevated serum creatine kinase level and 4) absence of dystrophin expression, as determined by immunostaining or Western blot (<2%) and/or DNA confirmation of dystrophin mutation.
- Minimum entry age of 7.0 years
- Ambulatory
Exclusion Criteria:
- Older than 13.0 years of age
- Contraindication to an MR examination (e.g. aneurysm clip, severe claustrophobia, magnetic implants)
- Presence of unstable medical problems
- Presence of a secondary condition that impacts muscle function or muscle metabolism (e.g. myasthenia gravis, endocrine disorder, mitochondrial disease)
- Contraindications to Tadalafil (use of nitrates, alpha-adrenergic blockers, other PDE5A inhibitors)
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: Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Tadalafil plus BOLD-MRI (Schedule A)
The intervention is the same as in Schedule B; this arm will use BOLD-MRI as the technique to monitor drug impact on skeletal muscle.
|
Patient will be randomized to one dose of 0.6 mg/kg tadalafill on one of two study visits.
On both visits, assessments (MRI, exercise testing, clinical function) will be performed 3 hours after time of dosing.
Other Names:
Patient will be randomized to one dose of 0.6 mg/kg tadalafill on one of two study visits.
On both visits, assessments (Doppler US, exercise testing, clinical function) will be performed 3 hours after time of dosing.
Other Names:
|
Experimental: Tadalafil plus Doppler ultrasound (Schedule B)
The intervention is the same as in Schedule A; this arm will use Doppler ultrasound as the technique to monitor drug impact on skeletal muscle.
|
Patient will be randomized to one dose of 0.6 mg/kg tadalafill on one of two study visits.
On both visits, assessments (MRI, exercise testing, clinical function) will be performed 3 hours after time of dosing.
Other Names:
Patient will be randomized to one dose of 0.6 mg/kg tadalafill on one of two study visits.
On both visits, assessments (Doppler US, exercise testing, clinical function) will be performed 3 hours after time of dosing.
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in post-contractile BOLD response after tadalafil dosing
Time Frame: MRI will be done 3 hours after dosing/no-dosing on two separate study visits
|
MRI technique to measure microvascular function in skeletal muscle
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MRI will be done 3 hours after dosing/no-dosing on two separate study visits
|
Change in post-exercise hyperemia after tadalafil dosing
Time Frame: Doppler ultrasound will be done 3 hours after dosing/no-dosing on two separate study visits
|
Doppler ultrasound will be used to measure blood flow
|
Doppler ultrasound will be done 3 hours after dosing/no-dosing on two separate study visits
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in submaximal exercise capacity after tadalafil dosing
Time Frame: Cycle testing will be done 4 hours after dosing/no-dosing on two separate study visits
|
incremental cardiopulmonary exercise testing on cycle ergometer will be performed to measure heart rate and parameters of exercise performance.
|
Cycle testing will be done 4 hours after dosing/no-dosing on two separate study visits
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Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Principal Investigator: Tanja Taivassalo, University of Florida
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)
December 14, 2021
Primary Completion (Estimated)
October 20, 2024
Study Completion (Estimated)
January 20, 2025
Study Registration Dates
First Submitted
January 4, 2022
First Submitted That Met QC Criteria
January 4, 2022
First Posted (Actual)
January 19, 2022
Study Record Updates
Last Update Posted (Estimated)
January 31, 2024
Last Update Submitted That Met QC Criteria
January 30, 2024
Last Verified
January 1, 2024
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
- Nervous System Diseases
- Genetic Diseases, Inborn
- Genetic Diseases, X-Linked
- Musculoskeletal Diseases
- Muscular Diseases
- Neuromuscular Diseases
- Muscular Disorders, Atrophic
- Muscular Dystrophies
- Muscular Dystrophy, Duchenne
- Molecular Mechanisms of Pharmacological Action
- Vasodilator Agents
- Urological Agents
- Enzyme Inhibitors
- Phosphodiesterase Inhibitors
- Phosphodiesterase 5 Inhibitors
- Tadalafil
Other Study ID Numbers
- IRB202102391
- OCR41391 (Other Identifier: UF OnCore)
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
Yes
Studies a U.S. FDA-regulated device product
No
product manufactured in and exported from the U.S.
Yes
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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