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Duchenne Muscular DystrophyPhase 3TAMDMDNCT03354039

Tamoxifen in Duchenne Muscular Dystrophy

A Phase 3 study testing Tamoxifen in people with Duchenne Muscular Dystrophy, run by University Hospital, Basel, Switzerland at 11 sites in 6 countries.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

A randomised, double blind, placebo controlled, 48-week clinical trial with a core population (group A) of 79 ambulant 6.5 to 12 years old Duchenne's muscular dystrophy (DMD) patients that are under stable standard treatment of care with glucocorticoids. Read more about this study

Who is it for?
Ages 78 months to 16 years, men only
Conditions the study is for
Duchenne Muscular Dystrophy
What is being tested?
Tamoxifen
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
93 participants
Where
11 sitesin 6 countries
Study dates
12 Jun 2018to 18 Oct 2022
Phase
Phase 3
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 78 months to 16 years
  • Men only
  • No healthy volunteers
  • Child

Who may be able to join

  • Group A (ambulant patients)
  • Documented diagnosis of DMD by mutation analysis in the dystrophin gene or by substantially reduced levels of dystrophin protein (i.e. absent or <5% of normal) on Western blot or immunostaining
  • Stable treatment with glucocorticoids >6 months (no significant change in dosage (>0.2mg/kg)) at screening; dosing adaptations according to weight change are allowed
  • Male gender
  • 6.5 to 12 years of age at time of screening
  • weight >20kg
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  • ambulant patients
  • able to walk at least 350 meters in 6 minute walking distance test without assistance at screening
  • MFM D1 subdomain of the MFM scale >40% at screening
  • Ability to provide informed consent and to comply with study requirements
  • Patients harbouring a nonsense mutation treatable with the approved drug ataluren should be under stable ataluren treatment for at least 3 months or in case of nontolerance being off ataluren treatment for at least 3 months before screening
  • Group B (non-ambulant patients)
  • Documented diagnosis of DMD by mutation analysis in the dystrophin gene or by substantially reduced levels of dystrophin protein (i.e. absent or <5% of normal) on Western blot or immunostaining
  • Not using glucocorticoids for >6 months
  • Male gender
  • Non-ambulant patients (walking distance less than 10 meters)
  • 10 to 16 years of age at time of screening
  • Ability to provide informed consent and to comply with study requirements
  • Open label extension
  • Recent participation and completion of TAMDMD study

Who cannot join

  • Known individual hypersensitivity or allergy to tamoxifen or other ingredients/excipients of IMP
  • Female gender
  • Use of tamoxifen or testosterone within the last 3 months
  • Known or suspected malignancy
  • Other chronic disease or clinically relevant limitation of renal, liver or heart function
  • Known or suspected non-compliance
Show all 21Show fewer
  • Any injury which may impact functional testing, e.g. upper or lower limb fracture
  • Planned or expected spinal fusion surgery during the study period (as judged by the Investigator; i.e. due to rapid progressing scoliosis), previous spinal fusion surgery is allowed if it took place more than 6 months prior to screening.
  • Inability to follow the procedures of the study, e.g. due to language problems, psychological disorders of the participant/parents (as judged by the investigator)
  • Concomitant participation in any other interventional trial (and up to 3 months prior to screening)
  • Use of CYP2D6 inhibitors or of CYP3A4 inducers (apart from glucocorticoids), platelet aggregation inhibitors and coumarin-type anti-coagulants
  • Use of drugs metabolized by CYP2C9, such as phenprocoumon, phenytoin, warfarin, celecoxib, fluvastatin, ginko biloba, St. John's wort and sulfamethoxazol
  • Galactosemia (lack of galactose-1-phosphat-uridylyltransferase or UDP-galactose-4-epimerase or galactokinase; Fanconi-Bickel-syndrome); congenital lack of lactase; glucose-galactose malabsorption
  • Presence of one or more of the following eye disorders: cataract, retinopathia, optic neuropathy, alteration of the cornea
  • Presence of one or more of the following laboratory abnormalities: anaemia, thrombocytopenia, leukopenia, neutropenia or agranulocytosis
  • Group A:
  • Glucocorticoid naïve patients
  • Start of glucocorticoid treatment or change in dosage <6 month prior to screening (dosing adaptations according to weight change are allowed)
  • Group B:
  • Glucocorticoid treated patients or patients that stopped glucocorticoid treatment <6 month prior to screening
  • Assisted ventilation of any kind necessary

Trial locations and contacts

11 sites in 6 countries.

11 sites in 6 countries

United Kingdom3 sites
  • Royal Hospital for Children

    Glasgow, G51 4TF

  • The Leeds Teaching Hospitals NHS Trust

    Leeds, LS9 7TF

  • Alder Hey Children's Hospital

    Liverpool, L12 2AP

Other trials in United Kingdom

France2 sites
  • Hôpitaux Raymond Poincaré

    Garches, 92380

  • Hôpital de Hautepierre

    Strasbourg, 67098

Other trials in France

Germany2 sites
  • DRK Klinik Berlin Westend

    Berlin, 14050

  • Universitätsklinikum Essen

    Essen, 45147

Other trials in Germany

Spain2 sites
  • Hospital Sant Joan de Déu. UB

    Esplugues de Llobregat, Barcelona, 08950

  • Hospital Universitario Virgen del Rocío

    Seville, 41013

Other trials in Spain

Netherlands1 site
  • Radboud umc

    Nijmegen, 6525

Other trials in Netherlands

Switzerland1 site
  • University Children's Hospital Basel

    Basel, 4031

Other trials in Switzerland

About this study

Official title: Tamoxifen in Duchenne Muscular Dystrophy: A Multicenter, Randomised, Double-blind, Placebo-controlled, Phase 3 Safety and Efficacy 48-week Trial

A randomised, double blind, placebo controlled, 48-week clinical trial with a core population (group A) of 79 ambulant 6.5 to 12 years old Duchenne's muscular dystrophy (DMD) patients that are under stable standard treatment of care with glucocorticoids. Furthermore, the investigators plan to include 6-20 non-ambulant patients who do not receive glucocorticoids (as parallel group B), 10 to 16 years old, to obtain efficacy and safety data in a broader DMD population. All patients will receive 20 mg of tamoxifen (TAM) or placebo once daily during 48 weeks.

An open label extension (OLE) trial for participants of the TAMDMD main study will be performed. All TAMDMD patients on TAM or placebo are offered to enter this OLE.

Read the detailed description

This is a 48-week multicentre, parallel, randomised, double-blind, placebo controlled phase 3 safety and efficacy trial. There are two treatment arms: Tamoxifen (verum) and placebo (control), with treatment allocation of 1:1.

The investigators plan to screen at least 79 and to enroll at least 71 ambulant DMD patients aged between 6.5 and 12 years (group A) and 6 - 20 non-ambulant DMD patients aged between 10 and 16 years (group B). In order to reach statistical power, 60 ambulant patients (group A) need to complete the trial. Treatment with 20 mg Tamoxifen once daily will be given for the total trial duration of 48 weeks.

Only patients with glucocorticoids (standard treatment of care) will be included in group A (ambulant patients) and only non-glucocorticoid users in group B. At baseline as well as at the end of the study clinical, laboratory, and MRI measurements will be performed. These include the Motor Function Measure (MFM) scale, timed function tests, the 6 minute walking distance, quantitative muscle testing (QMT) and quantitative thigh muscle MRI, questionnaires. A physical examination, an ECG, vital signs as well as safety laboratory blood analyses will be performed at every visit. Furthermore, an x-ray of the hand and a dual energy x-ray absorptiometry (DEXA)-scan will be performed at baseline and at the end of the study.

An open label extension (OLE) trial for participants of the TAMDMD main study will be performed. All TAMDMD patients on TAM or placebo are offered to enter this OLE. All OLE patients will receive 20 mg of TAM daily during 48 weeks. The same study specific assessments as in the double-blind randomized phase will be performed during the OLE phase

Being tested
Tamoxifen, Matching placebo
Keywords
DMD
Medical subject headings
Muscular Dystrophy, Duchenne

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • TamoxifenDrug

    DMD patients randomised to verum will receive 20 mg (0.6mg/kg) of Tamoxifen daily. Treatment will be given for the total period of 48 weeks.

  • Matching placeboDrug

    Patients randomised to placebo will be administered matching placebo. Treatment will be given for the total period of 48 weeks.

Study groups in NCT03354039
Study groupRoleWhat they receive
Tamoxifen 20 mg once dailyExperimentalDMD patients randomised to verum will receive 20 mg (0.6mg/kg) of TAM daily.
Receives: Drug: Tamoxifen
Matching placebo once dailyPlacebo comparatorPatients randomised to placebo will be administered matching placebo.
Receives: Drug: Matching placebo

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Reduction of disease progression

    To test if tamoxifen treatment, compared to placebo, reduces the progression of the disease in 6.5-12 years old ambulant DMD patients (Group A) by at least 50% (using the MFM D1 subscore as primary clinical endpoint).

    Measured: Baseline to week 48

Secondary outcomes (9)
  1. Muscle function measured by D2 MFM subscore

    D2 MFM subscore from baseline to week 48 under TAM treatment compared to placebo.

    Measured: Baseline to week 48

  2. Muscle function measured by D3 MFM subscore

    D3 MFM subscore from baseline to week 48 under TAM treatment compared to placebo.

    Measured: Baseline to week 48

  3. Muscle function measured by North Star Ambulatory Assessment

    North Star Ambulatory Assessment from baseline to week 48 under TAM treatment compared to placebo.

    Measured: Baseline to week 48

  4. Muscle function measured by proximal upper limb function

    Proximal upper limb function from baseline to week 48 under TAM treatment compared to placebo.

    Measured: Baseline to week 48

  5. Muscle function measured by 6 minute walking distance in meter

    6 minute walking distance in meter from baseline to week 48 under TAM treatment compared to placebo.

    Measured: Baseline to week 48

  6. Muscle function measured by 10 meter walking time in seconds

    10 meter walking time in seconds from baseline to week 48 under TAM treatment compared to placebo.

    Measured: Baseline to week 48

  7. Muscle function measured by time to rise from lying on the floor / supine up in seconds

    time to rise from lying on the floor / supine up in seconds from baseline to week 48 under TAM treatment compared to placebo.

    Measured: Baseline to week 48

  8. Muscle force measured by quantitative muscle testing (using Myogrip)

    Quantitative muscle testing (using Myogrip) from baseline to week 48 under TAM treatment compared to placebo.

    Measured: Baseline to week 48

  9. Muscle Degeneration measured by MRI

    Quantitative muscle MRI including muscle fat fraction (MFF) and T2 times of thigh muscles visualised by MRI from baseline to week 48 under TAM treatment compared to placebo.

    Measured: Baseline to week 48

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted27 Nov 2017
  2. Study start12 Jun 2018
  3. Primary completion25 Jul 2022
  4. Study completion18 Oct 2022

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
93 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03354039
Sponsor's protocol ID
TAMDMD
Acronym
TAMDMD
Status last verified
Dec 2022
First submitted
10 Oct 2017
Last updated
20 Dec 2022
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No

Publications

  • Zwingli G, Putananickal N, Schmidt S, Nagy S, Rubino-Nacht D, Schaedelin S, Amthor H, Childs AM, Deconinck N, Horrocks I, Houwen-van Opstal S, Laugel V, Lopez Lobato M, Nascimento Osorio A, Schara-Schmidt U, Spinty S, von Moers A, Lawrence F, Hafner P, Dorchies OM, Fischer D, Henzi BC. Safety and Efficacy of Tamoxifen in Patients with Duchenne muscular dystrophy: open Label Extension of TAMDMD Trial. Neuromuscul Disord. 2026 Apr;61:106366. doi: 10.1016/j.nmd.2026.106366. Epub 2026 Feb 1.

    PubMed 41691937
  • Henzi BC, Putananickal N, Schmidt S, Nagy S, Rubino-Nacht D, Schaedelin S, Amthor H, Childs AM, Deconinck N, Horrocks I, Houwen-van Opstal S, Laugel V, Lobato ML, Osorio AN, Schara-Schmidt U, Spinty S, von Moers A, Lawrence F, Hafner P, Dorchies OM, Fischer D. Safety and efficacy of tamoxifen in non-ambulant patients with Duchenne muscular dystrophy: a multicentre, randomised, double-blind, placebo-controlled, phase 3 trial (TAMDMD Group B). Neuromuscul Disord. 2025 Feb;47:105275. doi: 10.1016/j.nmd.2025.105275. Epub 2025 Jan 16.

    PubMed 39879732
  • Henzi BC, Schmidt S, Nagy S, Rubino-Nacht D, Schaedelin S, Putananickal N, Stimpson G; North Star Consortium; Amthor H, Childs AM, Deconinck N, de Groot I, Horrocks I, Houwen-van Opstal S, Laugel V, Lopez Lobato M, Madruga Garrido M, Nascimento Osorio A, Schara-Schmidt U, Spinty S, von Moers A, Lawrence F, Hafner P, Dorchies OM, Fischer D. Safety and efficacy of tamoxifen in boys with Duchenne muscular dystrophy (TAMDMD): a multicentre, randomised, double-blind, placebo-controlled, phase 3 trial. Lancet Neurol. 2023 Oct;22(10):890-899. doi: 10.1016/S1474-4422(23)00285-5.

    PubMed 37739572
  • Nagy S, Hafner P, Schmidt S, Rubino-Nacht D, Schadelin S, Bieri O, Fischer D. Tamoxifen in Duchenne muscular dystrophy (TAMDMD): study protocol for a multicenter, randomized, placebo-controlled, double-blind phase 3 trial. Trials. 2019 Nov 21;20(1):637. doi: 10.1186/s13063-019-3740-6.

    PubMed 31752977

Questions about this trial

What is this clinical trial studying?

A Phase 3 study testing Tamoxifen in people with Duchenne Muscular Dystrophy, run by University Hospital, Basel, Switzerland at 11 sites in 6 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 20 inclusion and 21 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 20 Dec 2022. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 11 sites in United Kingdom, France, Germany, Spain, Netherlands and 1 more country. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Reduction of disease progression (time frame: Baseline to week 48). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT03354039, which also lists 4 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 20 Dec 2022.

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