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Malignant Pleural MesotheliomaPhase 1NCT04897022

A Study of Pembrolizumab and Radiation Therapy in People With Mesothelioma

A Phase 1 study testing Pembrolizumab and IMPRINT in people with Malignant Pleural Mesothelioma, run by Memorial Sloan Kettering Cancer Center at 7 sites in United States.

Active, not recruiting

Under way, not looking for participants. Everyone needed has enrolled. The study is still running.

Official record
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Trial summary

The purpose of this study is to find out whether IMPRINT in combination with pembrolizumab is a safe treatment for people with malignant pleural mesothelioma (MPM).The highest dose of IMPRINT that causes few or mild side effects when given in combination with pembrolizumab will be found. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Malignant Pleural Mesothelioma
What is being tested?
Pembrolizumab and IMPRINT
Could I receive a placebo?
No, everyone receives an active treatment
How many people
7 participants
Where
7 sitesUnited States
Study dates
10 Aug 2021to Aug 2026
Phase
Phase 1
Are there results?
Not yet: the study is under way

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

  • Pathologically confirmed diagnosis of malignant pleural mesothelioma
  • Unresectable per thoracic surgeon assessment
  • At least one prior line of systemic therapy. Note: Patients who were on prior immunotherapy are eligible.
  • ECOG 0-1
  • PFTs: DLCO >40% predicted, FEV1 >50% predicted
  • Male/female participants who are at least 18 years of age on the day of signing informed consent
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  • Disease outside the ipsilateral thorax allowed as long as it has either been treated definitively and been stable for 6 months
  • Male participants:
  • A male participant must agree to use a contraception as detailed in Appendix 1 of this protocol during the treatment period and for at least 30 days, corresponding to time needed to eliminate any study treatment(s) (pembrolizumab and or any active comparator/combination) plus an additional 120 days (a spermatogenesis cycle) for study treatments with evidence of genotoxicity at any dose after the last dose of study treatment and refrain from donating sperm during this period.
  • Female participants:
  • A female participant is eligible to participate if she is not pregnant (see Appendix 1), not breastfeeding, and at least one of the following conditions applies:
  • Not a woman of childbearing potential (WOCBP) as defined in Appendix 1 OR
  • A WOCBP who agrees to follow the contraceptive guidance in Appendix 1 during the treatment period and for at least 120 days (corresponding to time needed to eliminate any study treatment(s) (pembrolizumab and or any active comparator/combination) plus 30 days (a menstruation cycle) for study treatments with risk of genotoxicity after the last dose of study treatment.
  • The participant (or legally authorized representative if applicable) provides written informed consent for the trial.
  • Have a ECOG performance status of 0 to 1. Evaluation of ECOG is to be performed within 30 days prior to the date of allocation.
  • Have adequate organ function as defined in the following table (Table 1). Specimens must be collected within 45 days prior to the start of study treatment.
  • Table 1: Adequate Organ Function Laboratory Values
  • System: Hematological Absolute neutrophil count (ANC) ≥ 1.5 K/mcL Platelets ≥ 100 K/mcL Hemoglobin ≥ 9.0 g/dL
  • System: Renal Creatinine OR Measured or calculated^b creatinine clearance (GFR can also be used in place of creatinine or CrCl): ≤ 1.5 x ULN OR ≥ 30 mL/min for participant with creatinine levels >1.5 x institutional ULN
  • System: Hepatic Total bilirubin: ≤ 1.5 x ULN OR direct bilirubin ≤ ULN for participants with total bilirubin levels >1.5 x ULN AST (SGOT) and ALT (SGPT): ≤ 2.5 x ULN (≤ 5 x ULN for participants with liver metastases)
  • ALT (SGPT)=alanine aminotransferase (serum glutamic pyruvic transaminase); AST (SGOT)=aspartate aminotransferase (serum glutamic oxaloacetic transaminase); GFR=glomerular filtration rate; ULN=upper limit of normal. Criteria must be met without erythropoietin dependency and without packed red blood cell (pRBC) transfusion within last 2 weeks.
  • ^b: Creatinine clearance (CrCl) should be calculated per institutional standard.
  • Note: This table includes eligibility-defining laboratory value requirements for treatment; laboratory value requirements should be adapted according to local regulations and guidelines for the administration of specific chemotherapies.

Who cannot join

  • Newly diagnosed MPM
  • Prior thoracic radiation therapy or intrapleural therapy
  • Bulky disease in the fissure preventing IMPRINT
  • Serious infection, concurrent active malignancies, or other serious medical illness
  • Has received prior therapy with an anti-PD-1, anti-PD-L1, or anti-PD-L2 agent or with an agent directed to another stimulatory or co-inhibitory T-cell receptor (eg, CTLA-4, OX-40, CD137) within 4 weeks prior to study Day 1 or has not recovered (i.e., ≥ Grade 1 at baseline) from adverse events due to a previously administered agent
  • Has received a live vaccine within 30 days prior to the first dose of study drug. Examples of live vaccines include, but are not limited to, the following: measles, mumps, rubella, varicella/zoster (chicken pox), yellow fever, rabies, Bacillus Calmette-Guérin (BCG), and typhoid vaccine. Seasonal influenza vaccines for injection are generally killed virus vaccines and are allowed; however, intranasal influenza vaccines (eg, FluMist®) are live attenuated vaccines and are not allowed.
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  • Is currently participating in or has participated in a study of an investigational agent or has used an investigational device within 4 weeks prior to the first dose of study treatment.
  • Note: Participants who have entered the follow-up phase of an investigational study may participate as long as it has been 4 weeks after the last dose of the previous investigational agent.
  • Has a diagnosis of immunodeficiency or is receiving chronic systemic steroid therapy (in dosing exceeding 10 mg daily of prednisone equivalent) or any other form of immunosuppressive therapy within 7 days prior to the first dose of study drug.
  • Has a known additional malignancy that is progressing or has required active treatment within the past 2 years. Note: Participants with basal cell carcinoma of the skin, squamous cell carcinoma of the skin, or carcinoma in situ (e.g. breast carcinoma, cervical cancer in situ) that have undergone potentially curative therapy are not excluded. Low grade malignancies not requiring active treatment are not excluded.
  • Has known active CNS metastases and/or carcinomatous meningitis. Participants with previously treated brain metastases may participate provided they are radiologically stable, i.e. without evidence of progression, clinically stable and without requirement of steroid treatment for at least 14 days prior to first dose of study treatment.
  • Has severe hypersensitivity (≥ Grade 3) to pembrolizumab and/or any of its excipients.
  • Has active autoimmune disease that has required systemic treatment in the past 2 years (i.e. with use of disease modifying agents, corticosteroids or immunosuppressive drugs). Replacement therapy (eg., thyroxine, insulin, or physiologic corticosteroid replacement therapy for adrenal or pituitary insufficiency, etc.) is not considered a form of systemic treatment.
  • Has a history of (non-infectious) pneumonitis that required steroids or has current pneumonitis.
  • Has a known history of Human Immunodeficiency Virus (HIV).
  • Has a known history of Hepatitis B (defined as Hepatitis B surface antigen [HBsAg] reactive) or known active Hepatitis C virus (defined as HCV RNA [qualitative] is detected) infection.
  • Has a known history of active TB (Bacillus Tuberculosis).
  • Has a history or current evidence of any condition, therapy, or laboratory abnormality that might confound the results of the study, interfere with the subject's participation for the full duration of the study, or is not in the best interest of the subject to participate, in the opinion of the treating investigator.
  • Has known psychiatric or substance abuse disorders that would interfere with cooperation with the requirements of the trial.
  • Is pregnant or breastfeeding, or expecting to conceive or father children within the projected duration of the study, starting with the screening visit through 120 days after the last dose of trial treatment.
  • Has undergone major surgery <4 weeks from starting pembrolizumab.

Trial locations and contacts

7 sites in 1 country.

7 sites in 1 country

United States7 sites

  • Memorial Sloan Kettering Basking Ridge (Limited protocol activities)

    Basking Ridge, New Jersey, 07920

  • Memorial Sloan Kettering Suffolk- Commack (Limited Protocol Activities)

    Commack, New York, 11725

  • Memorial Sloan Kettering Westchester (Limited Protocol Activities)

    Harrison, New York, 10604

  • Memorial Sloan Kettering Monmouth (Limited Protocol Activities)

    Middletown, New Jersey, 07748

  • Memorial Sloan Kettering Bergen (Limited Protocol Activities)

    Montvale, New Jersey, 07645

  • Memorial Sloan Kettering Cancer Center

    New York, New York, 10065

  • Memorial Sloan Kettering Nassau (Limited protocol activities)

    Rockville Centre, New York, 11553

Other trials in United States

About this study

Official title: Phase I Dose Escalation and Local Control Study of Pembrolizumab + Intensity-Modulated Pleural Radiation Therapy (IMPRINT) for Malignant Pleural Mesothelioma

The purpose of this study is to find out whether IMPRINT in combination with pembrolizumab is a safe treatment for people with malignant pleural mesothelioma (MPM).The highest dose of IMPRINT that causes few or mild side effects when given in combination with pembrolizumab will be found. Once the highest safe dose of IMPRINT is found, it will be tested in combination with pembrolizumab in future participants to see whether the combination may be an effective treatment for MPM.

Being tested
Pembrolizumab, IMPRINT
Keywords
malignant pleural mesothelioma, MPM, intensity-modulated pleural radiation therapy, IMPRINT, Pembrolizumab, 21-197, Memorial Sloan Kettering Cancer Center
Medical subject headings
Mesothelioma, Malignant

What participants receive

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

  • PembrolizumabDrug

    Fixed dose of pembrolizumab 200mg IV q3 weeks

  • IMPRINTRadiation

    Also called intensity-modulated pleural radiation therapy

    The starting radiation dose will consist of 400cGy x5 fractions. Doses will be escalated by 100cGy per fraction (i.e. 400cGy, 500cGy, 600cGy) for a total of 3 dose levels. The MTD will be evaluated using a modified Continuous Reassessment Method. Dose limiting toxicities (DLTs) are defined as any treatment-related non-hematologic toxicity with a CTCAE v5 Grade ≥3 or grade ≥2 pneumonitis that requires use of steroids occurring after the start of IMPRINT through the first 3 months after the last fraction.

Study groups in NCT04897022
Study groupRoleWhat they receive
Participants with malignant pleural mesothelioma (MPM)ExperimentalParticipants will be diagnosed with malignant pleural mesothelioma and be deemed unresectable per thoracic surgeon assessment
Receives: Drug: Pembrolizumab; Radiation: IMPRINT

What is being measured

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

  1. Maximum Tolerated Dose (MTD) of IMPRINT

    The first primary objective of this study is to determine the MTD of IMPRINT among the three candidate doses: 400cGy x5 fractions, 500cGy x5 fractions and 600cGy x5 fractions. These dose levels will be evaluated using a modified Continuous Reassessment Method (CRM) starting with the lowest dose level 400cGy x5 fractions. Determined by the first 12 participants enrolled to the study.

    Measured: 6 months

Timeline

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

  1. First posted21 May 2021
  2. Study start10 Aug 2021
  3. Primary completionAug 2026 (estimated)
  4. Study completionAug 2026 (estimated)

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
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
7 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04897022
Sponsor's protocol ID
21-197
Status last verified
Mar 2026
First submitted
18 May 2021
Last updated
12 Mar 2026
Results posted
No
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
Yes: Memorial Sloan Kettering Cancer Center supports the international committee of medical journal editors (ICMJE) and the ethical obligation of responsible sharing of data from clinical trials. The protocol summary, a statistical summary, and informed consent form will be made available on clinicaltrials.gov when required as a condition of Federal awards, other agreements supporting the research and/or as otherwise required. Requests for deidentified individual participant data can be made beginning 12 months after publication and for up to 36 months post publication. Deidentified individual participant data reported in the manuscript will be shared under the terms of a Data Use Agreement and may only be used for approved proposals. Requests may be made to: crdatashare@mskcc.org.

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing Pembrolizumab and IMPRINT in people with Malignant Pleural Mesothelioma, run by Memorial Sloan Kettering Cancer Center at 7 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 23 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: under way, not looking for participants, as of the sponsor's last update on 12 Mar 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 7 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?

This study is still under way. Results are not available in the source record yet.

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?

Maximum Tolerated Dose (MTD) of IMPRINT (time frame: 6 months). 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 NCT04897022.

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 12 Mar 2026.

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