ClinicalTrials.gg
CompletedNCT03288480Updated Apr 26, 2022

A Phase 1/2a Dose-Finding Study of PT-112 in Patients With Relapsed or Refractory Multiple Myeloma

A Phase 1 interventional study of PT-112 in Multiple Myeloma, sponsored by Promontory Therapeutics Inc.. Completed at 7 sites in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2022-04-26.

Sponsored by Promontory Therapeutics Inc. · Phase 1, Interventional, and Treatment

From the registry’s dates

  • Primary completion was Sep 2020, 6 years 1 month ago, and no results have been posted to the registry.
Phase
Phase 1
Study type
Interventional
Enrollment
24
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Study summary

Study PT-112-102, a multicenter, open-label dose-finding and pharmacokinetic study of PT-112 in patients with relapsed or refractory multiple myeloma.

This is designed as a two-part study. In the first part of the study, cohorts of three patients (expanded to six patients in the event of a dose-limiting toxicity) will receive escalating doses of PT-112 until the MTD is reached, based on tolerability observed during the first 28 days of treatment. In the second part of the study, an expansion cohort of 14 patients will be treated at the recommended dose to confirm the tolerability of treatment and evaluate evidence of treatment efficacy.

02

Conditions studied

  • Multiple Myeloma

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03

In context

Multiple Myeloma

3,760 studies on the registry are indexed under Multiple Myeloma; 769 are open to participants now.

This study's enrollment of 24 is below the median of 41 across 3,005 interventional studies indexed under Multiple Myeloma.

Browse Multiple Myeloma studies →

Lead sponsor

Promontory Therapeutics Inc. is the lead sponsor of 3 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:

  1. Previously diagnosed with MM requiring treatment based on IMWG diagnostic criteria;
  2. MM after adequate exposure to and therapeutic response (following IMWG response criteria) to at least one with one or more active agents, including alkylating drugs, , immunomodulatory drugs (IMiD: thalidomide, lenalidomide, pomalidomide), proteasome inhibitors (bortezomib, cartilzomib), and monoclonal antibodies (daratumumab, elotuzumab, ixazomab);
  3. Evaluable MM with at least one of the following: (a) serum monoclonal component ≥ 0.5 g/dL; or (b) Bence Jones (BJ) proteinuria ≥ 200 mg/24h; or (c) measurable plasmacytoma (not previously irradiated); or (d) involved serum free light chain ≥ 10 mg/dL with an abnormal free light chain ratio;
  4. Performance Status (PS) 0-2;
  5. > 3 months;
  6. At least 2 weeks (or 5 half-lives, whichever is longer) wash-out since the end of previously administered experimental therapy (6 weeks if previous nitrosourea containing regimen) or 2 weeks for standard-of-care regimens. Concurrent corticosteroids are allowed provided they are administered at an equivalent prednisone dose of ≤ 10 mg/day, as prediction or blood products only;
  7. Recovery from non-hematologic toxic effects of prior therapy to grade ≤ 1 (except alopecia) by Version 4.03;
  8. Adequate bone marrow (BM), renal, hepatic and metabolic function.

Key Exclusion Criteria:

  1. Any of the following concomitant diseases/conditions:

    • History or presence of myocardial infarction, valvular heart disease, or congestive heart failure within the last 12 months;
    • Unstable cardiac dysrhythmias or persistent prolongation of the interval (QTc) (Fridericia) to >480 msec for males or >500 msec for females, based on at screening (patients with stable atrial fibrillation on treatment are allowed provided they do not meet any other cardiac or prohibited drug exclusion criterion);
    • Presence of current angina;
    • Active uncontrolled infection;
    • Morphological or cytological features of myelodysplasia and/or post-chemotherapy aplasia on BM assessment;
    • Myopathy > grade 2 or any clinical situation that causes significant and persistent elevation of CPK (>2.5 x in two different determinations performed one week apart);
    • Peripheral neuropathy > grade 1, except for grade 2 without limitations on instrumental daily life activities;
    • POEMS syndrome or active plasma cell leukemia;
    • Chronic (GVHD) or on therapy for the control of GVHD;
    • History or presence within the last 3 months of Deep Vein Thrombosis (DVT) or a pulmonary embolism (PE);- Uncontrolled ;
    • Uncontrolled disease-related metabolic disorder (e.g., hypercalcemia);
    • Acute or chronic infections requiring systemic therapy, including, among others:
    • active infection requiring systemic therapy;
    • history of testing positive to (HIV) or known acquired immunodeficiency syndrome;
    • virus (HBV) or virus (HCV) infection at screening (positive HBV surface antigen or HCV RNA if anti-HCV antibody screening test is positive);
    • active tuberculosis (history of exposure or history of positive TB test with presence of clinical symptoms, physical or radiographic finding);
    • Any other major illness that, in the Investigator's judgment, may substantially increase the risk associated with the patient's participation in this study;
  2. History of prior other than those previously treated with a curative intent more than 5 years ago and without relapse (any tumor) or basal cell skin cancer, in situ cervical cancer, superficial bladder cancer, or high grade intestinal polyps treated adequately, regardless of the disease-free interval;
  3. Prior irradiation to > 30% of BM reserves (including total body irradiation), regardless of the ;
  4. High dose chemotherapy followed by stem cell transplantation within 90 days prior to initiating study treatment;
  5. Bisphosphonate treatment within 7 days prior to initiating study treatment (while on study, bisphosphonates can be administered only once a month, between Days 18 to 21 of the 28-day treatment cycle)
Terms in these criteria, in plain language(19)

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.

Relapsed and refractory

Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.

Line of therapy

A line of therapy is one course of treatment, which may combine several drugs. First-line is the first course given; second-line follows when that stops working or is not tolerated.

“Two prior lines” means two courses that count separately under the study’s rules — not simply two drugs. Ask the study team if you are unsure how yours are counted.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

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.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

QT and QTc

On an ECG, the QT interval is the time the heart’s lower chambers take to activate electrically and recover in each beat. QTc is that time adjusted for heart rate (QTcF by Fridericia’s formula, QTcB by Bazett’s). Some medicines lengthen it, and a long QTc can raise the risk of a dangerous heart rhythm.

The study may name a correction formula and a limit in milliseconds, often around 450–480.

ECG (electrocardiogram)

A recording of the heart’s electrical activity, taken with stickers on the chest, arms and legs. It takes a few minutes and does not hurt.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

GVHD (graft-versus-host disease)

After a transplant from a donor, the donor’s immune cells attack the recipient’s body, often the skin, gut or liver.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

Leptomeningeal disease

Cancer that has spread to the leptomeninges, the thin layers covering the brain and spinal cord, and the fluid between them. It is not the same as brain metastases.

Criteria often treat it separately, and many studies leave it out even where treated brain metastases are allowed.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

Washout period

A planned gap after a treatment, so that its effects can lessen before the study treatment or a study assessment. Ask the study team and the doctor who prescribed it before changing any medicine.

Allogeneic and autologous transplant

Stem cell (bone marrow) transplants. Allogeneic uses cells from a donor; autologous uses your own cells, collected earlier and given back.

05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
24 participants (actual)

Study arms

  • Other
    PT-112

    This is a single arm study of PT-112, which is administered to patients with relapsed or refractory MM

    Drug: PT-112

Interventions

  • DrugPT-112

    This is a single arm study

06

What researchers measure

Primary outcomes

  1. Recommended dose (RD) of PT-112 for further studies in patients with relapsed or refractory multiple myeloma (MM)

    Time frame: 18 months

Secondary outcomes

  1. Peak Plasma Concentration (Cmax)

    Time frame: 18 months

  2. Area under the plasma concentration versus time curve (AUC)

    Time frame: 18 months

  3. Dose-limiting toxicities (DLTs)

    Time frame: 18 months

  4. Number of patients with Adverse Events (AEs)

    Characterization of the type, incidence, severity, duration, reversibility and relationship to treatment of adverse events (AEs), and effects on vital signs and laboratory parameters.

    Time frame: 18 months

  5. Tumor response, including assessment of minimal residual disease, according to the International Myeloma Working Group (IMWG) response criteria

    Time frame: 18 months

  6. Duration of response

    Time frame: 18 months

  7. Progression free survival

    Time frame: 18 months

  8. Relationship between sensitivity/response to treatment and disease status including cytogenetic biomarkers

    Time frame: 18 months

07

Study locations

7 sites
  • Mayo Clinic Cancer Center
    Phoenix, Arizona 85054, United States
  • Rocky Mountain Cancer Centers
    Denver, Colorado 80220, United States
  • Mayo Clinic Cancer Center
    Jacksonville, Florida 32224, United States
  • Mayo Clinic Cancer Center
    Rochester, Minnesota 55905, United States
  • Rutgers Cancer Institute of New Jersey
    New Brunswick, New Jersey 08903, United States
  • University of Pennsylvania
    Philadelphia, Pennsylvania 19104, United States
  • Texas Oncology San Antonio Medical Center
    San Antonio, Texas 78240, United States
08

References and documents

Individual participant data

Plan to share: Undecided

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 Apr 26, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03288480
Lead sponsor
Promontory Therapeutics Inc.
Responsible party
Sponsor
First posted
Sep 20, 2017
Start date
Dec 15, 2017
Primary completion
Sep 30, 2020
Completion
Mar 1, 2021
Last update
Apr 26, 2022

Study contacts

Leif Bergsagel, MD
principal investigator · Mayo Clinic

Oversight

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

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This study is completed, as verified in Apr 2022. You cannot join it, but the record below documents what was studied.

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Studies of the drug tested here: Imifoplatin

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