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TerminatedNCT03837457PRISMUpdated Nov 19, 2020

PRISM: Efficacy and Safety of Cobomarsen (MRG-106) in Subjects With Mycosis Fungoides Who Have Completed the SOLAR Study

A Phase 2 interventional study of Cobomarsen in Cutaneous T-Cell Lymphoma/Mycosis Fungoides, sponsored by miRagen Therapeutics, Inc.. Terminated at 9 sites in 3 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2020-11-19.

Sponsored by miRagen Therapeutics, Inc. · Phase 2, Interventional, and Treatment

Why this study was terminated
Study no longer needed because eligible subjects may receive treatment with cobomarsen in a crossover arm of the SOLAR clinical trial (NCT03713320)

From the registry’s dates

  • Primary completion was Jul 2020, 6 years 3 months ago, and no results have been posted to the registry.
Phase
Phase 2
Study type
Interventional
Enrollment
8
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Study summary

The main objective of this clinical trial is to study the efficacy and safety of cobomarsen (also known as MRG-106) for the treatment of cutaneous T-cell lymphoma (CTCL), mycosis fungoides (MF) subtype in subjects who have confirmed disease progression following treatment with vorinostat in the SOLAR clinical study (MRG106-11-201). Cobomarsen is designed to inhibit the activity of a molecule called miR-155 that may be important to the growth and survival of MF cancer cells.

The effects of treatment will be measured based on changes in skin lesion severity, disease-associated symptoms, and quality of life, as well as the length of time that the subject's disease remains stable or improved, without evidence of disease progression. The safety and tolerability of cobomarsen will be assessed based on the frequency and severity of observed side effects.

Read the detailed description

Study Design:

Up to 60 subjects are expected to be enrolled after discontinuation from the SOLAR clinical study (MRG106-11-201). Cobomarsen will be administered in the clinic by 2-hr intravenous infusion on Days 1, 3, 5 and 8, and weekly thereafter. Treatment will continue until the subject becomes intolerant, develops clinically significant side effects, progresses, or the trial is terminated.

02

Conditions studied

  • Cutaneous T-Cell Lymphoma/Mycosis Fungoides

Keywords

  • PRISM
  • Cutaneous T-cell Lymphoma
  • CTCL
  • Mycosis Fungoides
  • Lymphoma
  • Lymphoma, T-cell
  • Lymphoma, T-cell, cutaneous
  • Lymphoma, Non-Hodgkin
  • Lymphoproliferative Disorders
  • Lymphatic Diseases
  • Immunoproliferative Disorders
  • Immune System Diseases
  • Neoplasms
  • MicroRNAs
03

In context

Mycosis Fungoides

447 studies on the registry are indexed under Mycosis Fungoides; 42 are open to participants now.

This study's enrollment of 8 is below the median of 34 across 321 interventional studies indexed under Mycosis Fungoides.

Browse Mycosis Fungoides studies →

Lead sponsor

miRagen Therapeutics, Inc. is the lead sponsor of 6 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Eligibility criteria

Key Inclusion Criteria:

  • Must have participated in the comparator arm of the SOLAR clinical trial and completed the study (confirmed disease progression).

Key Exclusion Criteria:

  • Sézary syndrome or mycosis fungoides with B2 involvement, defined as documented history of B2 and/or B2 staging at screening.
  • Evidence of large cell transformation.
  • Visceral involvement related to MF at screening.
  • Unresolved toxicities from prior vorinostat treatment, defined as having not resolved to v5.0 grade 0 or 1.
  • Any CTCL systemic therapy after completion of the SOLAR study and prior to Day 1 for PRISM.
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

CTCAE grade

The US National Cancer Institute’s scale of how severe an adverse event is — any unwanted medical event during a study, such as a symptom, an illness or an abnormal test result, whether or not a treatment caused it. Whether it did is judged separately.

1
Mild.
2
Moderate.
3
Severe.
4
Life-threatening.
5
Death due to the event.

“Side effects of earlier treatment resolved to grade 1 or less” means they have settled to mild or gone.

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
8 participants (actual)

Study arms

  • Experimental
    Cobomarsen

    Drug: Cobomarsen

Interventions

  • At least weekly intravenous infusions of cobomarsen (282 mg) throughout study treatment period

    Also known as: MRG-106

06

What researchers measure

Primary outcomes

  1. Proportion of subjects achieving an objective response of at least 4 months duration (ORR4)

    Based on composite global response criteria including radiological imaging, flow cytometry, and the modified Severity Weighted Assessment Tool (mSWAT).

    Time frame: Up to approximately 36 months (estimated study duration)

Secondary outcomes

  1. Progression-free survival

    Time from date of first dose of cobomarsen until the date of earliest documented progression or death from any cause.

    Time frame: Up to approximately 36 months (estimated study duration)

  2. Pruritis Numerical Rating Scale

    Measures the patient's degree of itch related to mycosis fungoides based on an 11-point scale (from 0-10), with 0 being no itch and 10 being worst imaginable itch.

    Time frame: Daily for up to 6 months, then weekly up to approximately 36 months (estimated study duration)

  3. Skindex-29 Dermatological Survey

    Measures the effects of skin disease on quality of life based on a 30-item questionnaire. The patient's responses are transformed to a linear scale from 0 to 100 and averaged to determine a subscore in three domains (Symptoms, Emotions and Functioning), as well as a total score. Lower scores indicate a lesser degree of skin disease interference with quality of life.

    Time frame: Monthly, up to approximately 36 months (estimated study duration)

  4. Pain Numerical Rating Scale

    Measures the patient's intensity of pain related to mycosis fungoides based on an 11-point scale (from 0-10), with 0 being no pain and 10 being worst imaginable pain.

    Time frame: Daily, for up to 6 months, then weekly up to approximately 36 months (estimated study duration)

  5. Difference in drug tolerability by Patient Impression of Treatment Side Effects

    Time frame: Weekly, up to approximately 36 months (estimated study duration)

  6. Duration of composite global response for responding subjects

    Time frame: Up to approximately 36 months (estimated study duration)

  7. Complete response rate

    Based on composite global response criteria including radiological imaging, flow cytometry, and mSWAT.

    Time frame: Up to approximately 36 months (estimated study duration)

  8. Skin disease severity based on modified Severity-weighted Assessment Tool (mSWAT)

    Measures skin disease severity based on the percentage of skin within each body region with patches, plaques, or tumors. Total scores are calculated by adding the total percent for each category of lesion (patch, plaque, or tumor) and multiplying by a weighting factor. Weighted subtotals are added together to obtain the total score. Lower scores indicate a lower degree of skin disease severity.

    Time frame: Monthly, up to approximately 36 months (estimated study duration)

  9. Time to progression

    Time from date of first dose of cobomarsen until the earliest date of confirmed progression.

    Time frame: Up to approximately 36 months (estimated study duration)

  10. Overall survival

    Time from date of first dose of cobomarsen until the date of death from any cause.

    Time frame: Up to approximately 36 months (estimated study duration)

  11. Number of participants with treatment-related adverse events as assessed by CTCAE v5.0

    Time frame: Up to approximately 36 months (estimated study duration)

  12. Plasma concentration of cobomarsen

    Sparse pharmacokinetic samples will be collected to monitor for accumulation of cobomarsen.

    Time frame: Day 1, Day 29 and monthly or every other month thereafter until End of Treatment visit, up to approximately 36 months (estimated study duration)

Other outcomes

  1. Number of participants with anti-drug antibody generation

    Time frame: Up to approximately 36 months (estimated study duration)

07

Study locations

9 sites
  • Mayo Clinic Hospital
    Phoenix, Arizona 85054, United States
  • Dana-Farber Cancer Institute
    Boston, Massachusetts 02215, United States
  • Washington University School of Medicine
    Saint Louis, Missouri 63108, United States
  • The Ohio State University and Wexner Medical Center
    Columbus, Ohio 43210, United States
  • University of Washington/Seattle Cancer Care Alliance
    Seattle, Washington 98109, United States
  • University Hospital Leuven
    Leuven, B3000, Belgium
  • Hopital Saint Andre, CHU de Bordeaux
    Bordeaux, 33076, France
  • Hopital Saint-Louis
    Paris, 75475, France
  • Hopital Charles Nicolle, CHU de Rouen
    Rouen, 76031, France
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Nov 19, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03837457
Lead sponsor
miRagen Therapeutics, Inc.
Responsible party
Sponsor
First posted
Feb 12, 2019
Start date
Oct 1, 2019
Primary completion
Jul 24, 2020
Completion
Jul 27, 2020
Last update
Nov 19, 2020

Study contacts

Diana M. Escolar, MD, FAAN
study director · miRagen Therapeutics, Inc.

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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