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MyelofibrosisPhase 1NCT03373877

Evaluation of Ruxolitinib in Combination With PU-H71 for Treatment of Myelofibrosis

A Phase 1 study testing PU-H71 and Ruxolitinib in people with Myelofibrosis and Primary Myelofibrosis, run by Samus Therapeutics, Inc. at 10 sites in United States.

Terminated

Stopped early. The study ended before it was planned to and will not resume.

Official record
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Trial summary

This is a multicenter 2-part, Phase 1b study designed to assess the safety, tolerability, pharmacokinetics (PK) and preliminary efficacy of PU-H71 in subjects taking concomitant ruxolitinib. The first part (Dose Escalation) will employ a standard 3+3 dose escalation design to determine Maximum Tolerated Dose (MTD). Read more about this study

Who is it for?
Ages 18 years and older
What is being tested?
PU-H71 and Ruxolitinib
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
4 participants
Where
10 sitesUnited States
Study dates
24 May 2018to 10 Mar 2020
Phase
Phase 1
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 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Subject has a confirmed diagnosis of myelofibrosis, including PMF, post-PV MF, and post-ET MF.
  • Subject has been receiving ruxolitinib therapy for intermediate or high-risk myelofibrosis for >6 months prior to enrollment with no more than 1 dose reduction of ruxolitinib in the 2-8 weeks prior to enrollment and a stable daily dose ≥5 mg twice daily (BID) >2 months prior to enrollment.
  • Subject has MF with evidence of persistent disease despite ruxolitinib monotherapy treatment, consisting of:
  • Persistent or worsening disease-related symptoms, including but not limited to fatigue, pruritus, night sweats, early satiety, and other symptoms as determined by a MPN-SAF TSS score of >20 points; AND
  • Documented splenomegaly of at least 5 cm below the costal margin as measured on inspiration by physical exam.
  • Subject has an Eastern Cooperative Oncology Group performance status of 0-2.
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  • Acceptable pre-study organ function during screening defined as:
  • Absolute neutrophil count (ANC) ≥ 1000/uL
  • Hemoglobin (hgb) ≥ 8.0 g/dL (may be supported with transfusion)
  • Platelets (plt) ≥ 75,000/uL
  • AST/SGOT and ALT/SGPT ≤2 x Upper Limit of Normal (ULN)
  • Direct serum bilirubin ≤ 1.5 x ULN
  • Creatinine clearance >50 mL/min/1.73 m2 based on Cockcroft Gault equation.

Who cannot join

  • Subject has known active liver disease, including viral hepatitis or cirrhosis.
  • Subject has known or suspected HIV or other active infections requiring acute or chronic treatment with systemic antibiotics. Conditions requiring topical antibiotics are acceptable.
  • Subject has a QTcF > 480 ms (corrected) in the screening or baseline ECG.
  • Subject has left ventricular ejection fraction (LVEF) ≤ 50%, or below institution's lower limit of normal (whichever is lower) by echocardiogram (ECHO) or multigated acquisition (MUGA) scan.
  • Subject has a history (or family history) of long QT syndrome.
  • Subject has coronary artery disease with an ischemic event within 6 months prior to enrollment.
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  • Subject has a permanent cardiac pacemaker.
  • Subject has history of a second primary malignancy within the past 2 year except for the following (if appropriately treated and considered cured): stage I endometrial, surgically treated cervical or prostate carcinoma, and non-melanoma skin cancer.
  • Subject has significant uncontrolled medical condition within 6 months prior to enrollment, as determined by the investigator.
  • Subject has concurrent participation in any interventional studies within 14 days of first dose of study drug.
  • Subject has uncontrolled diabetes mellitus, in the judgment of the Principal Investigator.
  • Subject has an active ocular condition that in the opinion of the investigator may alter visual acuity during the course of the study (i.e., ocular inflammatory disease etc.) or a history or anticipation of major ocular surgery (including cataract extraction, intraocular surgery, etc.) during the study.

Trial locations and contacts

10 sites in 1 country.

10 sites in 1 country

United States10 sites
  • University of Michigan

    Ann Arbor, Michigan, 48109

  • Cleveland Clinic - Taussig Cancer Institute

    Cleveland, Ohio, 44195

  • Karmanos Cancer Institute

    Detroit, Michigan, 48201

  • Duke University Medical Center

    Durham, North Carolina, 27710

  • MD Anderson Cancer Center

    Houston, Texas, 77030

  • Yale Cancer Center

    New Haven, Connecticut, 06511

  • Ochsner Clinic Foundation

    New Orleans, Louisiana, 70121

  • University of Nebraska Medical Center

    Omaha, Nebraska, 68198

  • Abramson Cancer Center - University of Pennsylvania

    Philadelphia, Pennsylvania, 19104

  • Mays Cancer Center UT Health San Antonio

    San Antonio, Texas, 78229-3900

Other trials in United States

About this study

Official title: A Phase Ib Study of Ruxolitinib in Combination With PU-H71 for the Treatment of Subjects With Primary Myelofibrosis (PMF), Post-Polycythemia Vera MF (Post-PV MF), and Post-EssentialThrombocythemia MF (Post-ET MF)

This is a multicenter 2-part, Phase 1b study designed to assess the safety, tolerability, pharmacokinetics (PK) and preliminary efficacy of PU-H71 in subjects taking concomitant ruxolitinib. The first part (Dose Escalation) will employ a standard 3+3 dose escalation design to determine Maximum Tolerated Dose (MTD). The second part of the study (Dose Confirmation) will confirm the recommended Phase 2 dose (RP2D) in an expanded population.

Read the detailed description

This is a multicenter 2-part, Phase 1b study designed to assess the safety, tolerability, PK and preliminary efficacy of PU-H71 (dihydrochloride salt) in subjects taking concomitant ruxolitinib. The first part (Dose Escalation) will employ a standard 3+3 dose escalation design to determine MTD. The second part of the study (Dose Confirmation) will confirm the RP2D in an expanded population.

Up to 30 subjects who have active disease despite having received a minimum of 6 months of ruxolitinib therapy (including last 2 months at a daily dose of ≥5 mg twice daily and no more than one dose reduction 2-8 weeks prior to the baseline visit)stable dose will be enrolled to evaluate the safety, PK, and MTD of IV PU-H71 administered in combination ruxolitinib. Four ascending dose levels are planned. The planned dose levels of PU-H71 are 225 mg/m2, 300 mg/m2, 400 mg/m2, and 600 mg/m2. Additional dosing cohorts may be added at the discretion of the Safety Review Committee (SRC).

Following a 28-day screening period, eligible subjects will receive PU-H71 once weekly intravenously for three consecutive weeks, followed by one week off on a 28-day cycle (D1, D8, D15, every 28 days). Ruxolitinib will be administered twice daily per the package insert at the stable dose the subject had been receiving prior to enrolling in the study.

Subjects will have pk samples taken and ECGs performed at various time points throughout the study. Subjects will have safety evaluations including physical examinations, vital signs, laboratory assessments, and AE reporting. If deemed necessary, additional safety measurements will be performed at the discretion of the Investigator or the SRC.

Subjects will be treated until disease progression, DLT, death, or study termination.

At each dose level, a 3+3 dose escalation design will be employed. If none of the initial 3 subjects in the cohort experience a DLT within the first cycle, a new cohort of 3 subjects will be treated at the next higher dose level. If 1 of the 3 subjects in a cohort experiences a DLT, then 3 additional subjects will be treated at the same dose level as described under Dose Limiting Toxicities.

Once the MTD has been determined in the dose escalation portion of the study, up to 15 patients may be enrolled for further evaluation of safety, PK, and preliminary clinical activity in a dose confirmation phase.

A safety review committee (SRC) will assess the safety, tolerability, and available PK information collected for each dose level, decide whether to proceed to the next cohort, and determine the dose for the cohort.

Being tested
PU-H71, Ruxolitinib
Medical subject headings
Primary Myelofibrosis

What participants receive

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

  • PU-H71Drug

    PU-H71 treatments will be administered by IV infusion on days 1, 8, and 15 of each 28-day cycle.

  • RuxolitinibDrug

    Also called Jakafi

    Dosing will be in accordance with current package insert and dose subject was on during study entry.

Study groups in NCT03373877
Study groupRoleWhat they receive
Dose 1: PU-H71 225 mg/m2 + ruxolitinibExperimentalCohort 1
Receives: Drug: PU-H71; Drug: Ruxolitinib
Dose 2: PU-H71 300 mg/m2 + ruxolitinibExperimentalCohort 2
Receives: Drug: PU-H71; Drug: Ruxolitinib
Dose 3: PU-H71 400 mg/m2 + ruxolitinibExperimentalCohort 3
Receives: Drug: PU-H71; Drug: Ruxolitinib
Dose 4: PU-H71 600 mg/m2 + ruxolitinibExperimentalCohort 4
Receives: Drug: PU-H71; Drug: Ruxolitinib

What is being measured

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

  1. Incidence of adverse events

    Safety of PU-H71 in combination with ruxolitinib as assessed by the incidence and severity of adverse events (AEs) and serious AEs as determined by the NCI CTCAE v4.03.

    Measured: 12 months

  2. Maximum Tolerated Dose of PU-H71 (MTD)

    MTD as assessed by the occurrences of dose limiting toxicities of PU-H71 in combination with ruxolitinib. The MTD will be defined as the dose that does not exceed an acceptable threshold of toxicity.

    Measured: 7 months

  3. Recommended Phase 2 Dose of PU-H71 (RP2D)

    The RP2D is the dose with an acceptable risk/benefit ratio that warrant study in future trials

    Measured: 12 months

  4. Pharmacokinetic profile of PU-H71: Area under the plasma concentration versus time curve (AUC)

    Area under the plasma concentration versus time curve (AUC)

    Measured: 12 months

  5. Pharmacokinetic profile of PU-H71: Trough plasma concentration (Cmin)

    Trough plasma concentration (Cmin)

    Measured: 12 months

  6. Pharmacokinetic profile of PU-H71: Peak plasma concentration (Cmax)

    Peak plasma concentration (Cmax)

    Measured: 12 months

  7. Pharmacokinetic profile of PU-H71: Time to maximum plasma concentration (Tmax)

    Time to maximum plasma concentration (Tmax)

    Measured: 12 months

  8. Pharmacokinetic profile of PU-H71: Plasma half-life (T1/2)

    Plasma half-life (T1/2)

    Measured: 12 months

Secondary outcomes (3)
  1. Treatment Response

    Treatment response is to be evaluated using the revised IWG-MRT response criteria.

    Measured: 12 months

  2. Symptom Burden Assessment

    The symptomatic burden will be serially evaluated using the MPN-SAF TSS.

    Measured: 12 months

  3. Biological Markers

    Assess the effects of treatment on biological markers of the disease (i.e., bone marrow histology; JAK2V617F, CALR, or MPLW515L/K allele burden; cytogenetic response; serum cytokine profiles; and other biomarkers of disease activity).

    Measured: 12 months

Timeline

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

  1. First posted14 Dec 2017
  2. Study start24 May 2018
  3. Primary completion17 Oct 2019
  4. Study completion10 Mar 2020

Why it stopped: Samus is focusing all of their efforts in myelofibrosis on the new oral formulation of PU-H71.

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 1
Primary purpose
Treatment
Allocation
Non-randomised
Intervention model
Sequential
Masking
None (open label)
Enrolment
4 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03373877
Sponsor's protocol ID
PU-H71-01-002
Status last verified
Nov 2022
First submitted
29 Nov 2017
Last updated
15 Nov 2022
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing PU-H71 and Ruxolitinib in people with Myelofibrosis and Primary Myelofibrosis, run by Samus Therapeutics, Inc. at 10 sites in United States.

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 13 inclusion and 12 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: stopped early, as of the sponsor's last update on 15 Nov 2022. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 10 sites in United States. 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. 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 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

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 was stopped early (reason given: Samus is focusing all of their efforts in myelofibrosis on the new oral formulation of PU-H71.). Results are not available in the source record.

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?

Incidence of adverse events (time frame: 12 months). The study lists 8 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
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 15 Nov 2022.

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