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Unresectable Pleural or Peritoneal Malignant MesotheliomaPhase 2TremelimumabNCT01843374

Randomized, Double-blind Study Comparing Tremelimumab to Placebo in Subjects With Unresectable Malignant Mesothelioma

A Phase 2 study testing Tremelimumab in people with Unresectable Pleural or Peritoneal Malignant Mesothelioma, run by MedImmune LLC at 104 sites in 19 countries.

Active, not recruiting

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

Official record
Search all trials

Trial summary

This is a Phase 2b, randomized, double-blind, parallel-group study. Subjects with unresectable pleural or peritoneal malignant mesothelioma will be randomized in a 2:1 ratio to receive either tremelimumab or placebo. Approximately 564 subjects will be enrolled at study centers in multiple countries. Read more about this study

Who is it for?
Ages 18 to 99 years
What is being tested?
Tremelimumab
Type of treatment
Injection or infusion
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
571 participants
Where
104 sitesin 19 countries
Study dates
17 May 2013to 31 May 2027
Phase
Phase 2
Are there results?
Yes, posted in the registrySummary in the doctors' view

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 to 99 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Histologically and/or cytologically confirmed pleural or peritoneal malignant mesothelioma;
  • Disease not amenable to curative surgery;
  • Age 18 and over at the time of consent;
  • ECOG Performance status 0-1;
  • Progressed after previous receipt of 1-2 prior systemic treatments for advanced disease that included a first-line pemetrexed (or anti-folate)-based regimen in combination with platinum agent.
  • Recovered from all toxicities associated with prior treatment, to acceptable baseline status, or a NCI CTCAE Grade of 0 or 1, except for toxicities not considered a safety risk,
Show all 12Show fewer
  • Measurable diseaseby modified RECIST for pleural mesothelioma or RECIST v1.1 for peritoneal mesothelioma;
  • Adequate bone marrow, hepatic, and renal function determined within 14 days prior to randomization defined as:
  • Negative screening test results for human immunodeficiency virus (HIV), hepatitis A, B and C.
  • Written informed consent and any locally required authorization (eg, HIPAA in the USA, EU Data Privacy Directive authorization in the EU) obtained from the subject/legal representative prior to performing any protocol- related procedures, including screening evaluations;
  • Females of childbearing potential who are sexually active with a nonsterilized male partner must use a highly effective method of contraception for 28 days prior to the first dose of investigational product, and must agree to continue using such precautions for 6 months after the final dose of investigational product; cessation of contraception after this point should be discussed with a responsible physician.
  • Nonsterilized males who are sexually active with a female partner of childbearing potential must use a highly effective method of contraception from Days 1 through 90 post last dose. In addition, they must refrain from sperm donation for 90 days after the final dose of investigational product.

Who cannot join

  • Subjects who failed more than 2 prior systemic treatment regimens for advanced malignant mesothelioma;
  • Received any prior mAb against CTLA-4, programmed cell death 1 (PD1) or programmed cell death 1 ligand 1 (PD-L1);
  • History of chronic inflammatory or autoimmune disease with symptomatic disease within the last 3 years prior to randomization.
  • Active, untreated central nervous system (CNS) metastasis
  • Any serious uncontrolled medical disorder or active infection that would impair the subject's ability to receive investigational product;
  • History of other malignancy unless the subject has been disease-free for at least 3 years;
Show all 19Show fewer
  • Pregnant or breast feeding at time of consent;
  • Any condition that would prohibit the understanding or rendering of information and consent and compliance with the requirements of this protocol;
  • Active or history of diverticulitis;
  • Active or history of inflammatory bowel disease, irritable bowel disease, celiac disease or other serious gastrointestinal chronic conditions associated with diarrhea. Active or history of systemic lupus erythematosus or granulomatosis with polyangiitis;
  • History of sarcoidosis syndrome;
  • Currently receiving systemic corticosteroids or other immunosuppressive medications or has a medical condition that requires the chronic use of corticosteroids.
  • Subjects should not be vaccinated with live attenuated vaccines within one month prior to starting tremelimumab treatment;
  • The last dose of prior chemotherapy or radiation therapy was received less than 2 weeks prior to randomization;
  • Any unresolved toxicity NCI CTCAE Grade ≥ 2 from previous anticancer therapy with the exception of vitiligo and alopecia;
  • Any condition that, in the opinion of the investigator, would interfere with evaluation of the investigational product or interpretation of subject safety or study results;
  • Concurrent enrollment in another clinical study or receipt of an investigational product within the last 4 weeks
  • Employees of the study site directly involved with the conduct of the study, or immediate family members of any such individuals;
  • Subjects with a history of hypersensitivity to compounds of similar biologic composition to tremelimumab or any constituent of the product.

Trial locations and contacts

104 sites in 19 countries.

104 sites in 19 countries

United States21 sites
  • Research Site

    Augusta, Georgia, 30912

  • Research Site

    Baltimore, Maryland, 21201

  • Research Site

    Baltimore, Maryland, 21231

  • Research Site

    Canton, Ohio, 44710

  • Research Site

    Chicago, Illinois, 60637

  • Research Site

    Dallas, Texas, 75390

  • Research Site

    Durham, North Carolina, 27710

  • Research Site

    Houston, Texas, 77030

  • Research Site

    La Jolla, California, 92093

  • Research Site

    Los Angeles, California, 90025

  • Research Site

    Minneapolis, Minnesota, 55445

  • Research Site

    New Haven, Connecticut, 06511

  • Research Site

    New York, New York, 10065

  • Research Site

    Newark, Delaware, 19718

  • Research Site

    Peoria, Illinois, 61615

  • Research Site

    Philadelphia, Pennsylvania, 19104

  • Research Site

    Rochester, New York, 14642

  • Research Site

    San Francisco, California, 94143

  • Research Site

    Santa Monica, California, 90404

  • Research Site

    Scottsdale, Arizona, 85259

  • Research Site

    Tampa, Florida, 33612

Other trials in United States

Italy12 sites
  • Research Site

    Alessandria, 15100

  • Research Site

    Aviano, 33081

  • Research Site

    Bergamo, 24125

  • Research Site

    Bologna, 40138

  • Research Site

    Candiolo, 10060

  • Research Site

    Genova, 16132

  • Research Site

    Meldola, 47014

  • Research Site

    Milan, 20133

  • Research Site

    Orbassano, 10043

  • Research Site

    Padova, 35128

  • Research Site

    Rozzano, 20089

  • Research Site

    Siena, 53100

Other trials in Italy

Australia10 sites
  • Research Site

    Adelaide, 5000

  • Research Site

    Auchenflower, 4066

  • Research Site

    Box Hill, 3128

  • Research Site

    Chermside, 4032

  • Research Site

    East Bentleigh, 3165

  • Research Site

    Gosford, 2250

  • Research Site

    Heidelberg, 3084

  • Research Site

    Nedlands, 6009

  • Research Site

    Saint Leonards, 2065

  • Research Site

    Waratah, 2298

Other trials in Australia

Germany10 sites
  • Research Site

    Berlin, 13125

  • Research Site

    Esslingen a.N., 73730

  • Research Site

    Freiburg im Breisgau, 79106

  • Research Site

    Gauting, 82131

  • Research Site

    Großhansdorf, 22927

  • Research Site

    Hamburg, 21075

  • Research Site

    Hemer, 58675

  • Research Site

    Karlsruhe, 76137

  • Research Site

    Löwenstein, 74245

  • Research Site

    Lübeck, 23538

Other trials in Germany

United Kingdom9 sites
  • Research Site

    Leeds, LS9 7TF

  • Research Site

    Leicester, LE1 5WW

  • Research Site

    London, EC1A 7BE

  • Research Site

    London, SE1 9RT

  • Research Site

    Maidstone, ME16 9QQ

  • Research Site

    Manchester, M23 9LT

  • Research Site

    Metropolitan Borough of Wirral, CH63 4JY

  • Research Site

    Plymouth, PL6 8DH

  • Research Site

    Southampton, SO16 6YD

Other trials in United Kingdom

France7 sites
  • Research Site

    Caen, 14076

  • Research Site

    Le Mans, 72037

  • Research Site

    Lille, 59037

  • Research Site

    Nice, 06189

  • Research Site

    Rennes, 35033

  • Research Site

    Toulouse, 31059

  • Research Site

    Villejuif, 94805

Other trials in France

Spain5 sites
  • Research Site

    Barcelona, 08035

  • Research Site

    Donostia / San Sebastian, 20014

  • Research Site

    Madrid, 28040

  • Research Site

    Sabadell (Barcelona), 08208

  • Research Site

    Seville, 41013

Other trials in Spain

Poland4 sites
  • Research Site

    Gdansk, 80-952

  • Research Site

    Poznan, 60-693

  • Research Site

    Szczecin, 70-891

  • Research Site

    Warsaw, 02-781

Other trials in Poland

South Korea4 sites
  • Research Site

    Jeonnam, 58128

  • Research Site

    Seoul, 03722

  • Research Site

    Seoul, 05505

  • Research Site

    Seoul, 06351

Other trials in South Korea

Belgium3 sites
  • Research Site

    Edegem, 2650

  • Research Site

    Ghent, 9000

  • Research Site

    Leuven, 3000

Other trials in Belgium

Netherlands3 sites
  • Research Site

    Breda, 4818 CK

  • Research Site

    Eindhoven, 5623EJ

  • Research Site

    Rotterdam, 3015 GD

Other trials in Netherlands

Russia3 sites
  • Research Site

    Moscow, 115478

  • Research Site

    Nizhny Novgorod, 603006

  • Research Site

    Saint Petersburg, 197022

Other trials in Russia

South Africa3 sites
  • Research Site

    Kraaifontein, 7570

  • Research Site

    Pretoria, 0081

  • Research Site

    Pretoria, 0181

Other trials in South Africa

Sweden3 sites
  • Research Site

    Linköping, 58185

  • Research Site

    Lund, 22185

  • Research Site

    Umeå, SE90185

Other trials in Sweden

Canada2 sites
  • Research Site

    Sainte-Foy, Quebec, G1V 4G5

  • Research Site

    Toronto, Ontario, M5G 2M9

Other trials in Canada

Hungary2 sites
  • Research Site

    Gyöngyös - Mátraháza, 3200

  • Research Site

    Törökbálint, 2045

Other trials in Hungary

Denmark1 site
  • Research Site

    Copenhagen, 2100

Other trials in Denmark

Israel1 site
  • Research Site

    Beersheba, 84101

Other trials in Israel

Romania1 site
  • Research Site

    Craiova, 200385

Other trials in Romania

About this study

Official title: A Phase 2b, Randomized, Double-blind Study Comparing Tremelimumab to Placebo in Second- or Third-line Treatment of Subjects With Unresectable Pleural or Peritoneal Malignant Mesothelioma

This is a Phase 2b, randomized, double-blind, parallel-group study. Subjects with unresectable pleural or peritoneal malignant mesothelioma will be randomized in a 2:1 ratio to receive either tremelimumab or placebo. Approximately 564 subjects will be enrolled at study centers in multiple countries. The study consists of a screening period, a treatment period, a 90-day follow-up period for safety, and a long-term survival follow-up period.

Read the detailed description

This is a Phase 2b, randomized, double-blind, parallel-group study. Subjects with unresectable pleural or peritoneal malignant mesothelioma will be randomized in a 2:1 ratio to receive either tremelimumab or placebo.

Randomization will be stratified by EORTC status (low-risk vs high-risk), line of therapy (second vs third), and anatomical site (pleural vs peritoneal). This study plans to use the EORTC to stratify subjects into high or low risk groups in order to ensure balanced randomization to the different treatment groups. For subjects in whom pemetrexed was contraindicated or not tolerated or not an approved therapy (eg, peritoneal mesothelioma), prior therapy with a first-line platinum-based regimen is required. Approximately 564 subjects will be enrolled at study centers in multiple countries.

The study consists of a screening period, a treatment period, a 90-day follow-up period for safety, and a long-term survival follow-up period.

Being tested
Tremelimumab, Placebo
Keywords
tremelimumab, pleural, peritoneal, malignant mesothelioma, CTLA-4
Medical subject headings
Mesothelioma, Malignant, Diabetes Mellitus, Insulin-Dependent, 12

What participants receive

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

  • TremelimumabDrug

    Tremelimumab is to be administered as an IV solution, followed by observation.

  • PlaceboDrug

    Placebo is to be administered as an IV solution, followed by observation.

Study groups in NCT01843374
Study groupRoleWhat they receive
TremelimumabExperimentalTremelimumab
Receives: Drug: Tremelimumab
PlaceboPlacebo comparatorPlacebo
Receives: Drug: Placebo

What is being measured

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

  1. Overall Survival (OS)

    Overall survival (OS) by treatment arm

    Measured: 3 years.

Secondary outcomes (9)
  1. OS Rate at 18 Months by Treatment Arm

    The percentage of patients still alive at 18 months

    Measured: 18 months

  2. Progression-free Survival by Treatment Arm

    Progression-free survival will be measured from randomization to the first documentation of disease progression or death due to any cause, whichever occurs first. Progression is defined using the modified Response Evaluation Criteria in Solid Tumours (RECIST) for pleural mesothelioma or RECIST v1.1 for peritoneal mesothelioma and assessed by computed tomography (CT) or magnetic resonance imaging (MRI), as a 20% increase in the sum of the longest diameter of target lesions, or a measurable increase in a non-target lesion, or the appearance of new lesions.

    Measured: Time from randomization to disease progression or death, whichever occurs first, assessed up to 3 years.

  3. Overall Response Rate by Treatment Arm

    Overall response rate is defined as the proportion of participants with confirmed CR or PR per the modified Response Evaluation Criteria in Solid Tumours (RECIST) for pleural mesothelioma or RECIST v1.1 for peritoneal mesothelioma and assessed by computed tomography (CT) or magnetic resonance imaging (MRI). Complete Response (CR) corresponds to disappearance of all target lesions, and Partial Response (PR), >=30% decrease in the sum of the longest diameter of target lesions. Overall Response (OR) = CR + PR.

    Measured: Time from randomization to best response to treatment, assessed up to 3 years.

  4. Duration of Response by Treatment Arm

    Duration of response will be defined as the duration from the first documentation of complete response (CR), partial response (PR) to the first documented disease progression.

    Measured: Duration of response from the first documentation of objcetive response (confirmed CR or PR) to the first documented disease progression, assessed up to 14 weeks after the initial response.

  5. Disease Control Rate by Treatment Arm

    Disease control rate (DCR) is defined as the proportion of participants with best response of complete response (CR), partial response (PR), or stable disease (SD) of ≥ 12 weeks duration

    Measured: Time from randomization to disease progression or death, whichever occurs first, assessed up to 3 years.

  6. Durable Disease Control Rate by Treatment Arm

    Durable disease control rate (DDCR) is defined as the percentage of participants with best response of complete response (CR), partial response (PR), or stable disease (SD) of ≥ 6 months duration

    Measured: Time from randomization to disease progression or death, whichever occurs first, assessed up to 3 years.

  7. Number of Participants Reporting Any Adverse Event

    Any untoward medical occurrence in a patient or clinical investigation participants administered a pharmaceutical product and which does not necessarily have a causal relationship with this treatment.

    Measured: Day 1- 90 days post dose

  8. Number of Participants Reporting Any Serious Adverse Events

    Measured: Day 1 to 90 days post dose

  9. Number of Participants With Positive Anti-drug Antibodies

    The immunogenicity titer is reported for samples confirmed positive for the presence of anti tremelimumab antibodies.

    Measured: Week 5

Timeline

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

  1. First posted30 Apr 2013 (estimated)
  2. Study start17 May 2013
  3. Primary completion24 Jan 2016
  4. Study completion31 May 2027 (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 2
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
571 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT01843374
Sponsor's protocol ID
D4880C00003
Other IDs
2012-003524-21
Acronym
Tremelimumab
Status last verified
Jun 2026
First submitted
22 Apr 2013
Last updated
27 Jul 2026
Data monitoring committee
Yes
Individual data sharing
Yes: Qualified researchers can request access to anonymized individual patient-level data from AstraZeneca group of companies sponsored clinical trials via the request portal. All request will be evaluated as per the AZ disclosure commitment: https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure

Publications

  • Baverel P, Roskos L, Tatipalli M, Lee N, Stockman P, Taboada M, Vicini P, Horgan K, Narwal R. Exposure-Response Analysis of Overall Survival for Tremelimumab in Unresectable Malignant Mesothelioma: The Confounding Effect of Disease Status. Clin Transl Sci. 2019 Sep;12(5):450-458. doi: 10.1111/cts.12633. Epub 2019 Apr 12.

    PubMed 30883000
  • Maio M, Scherpereel A, Calabro L, Aerts J, Perez SC, Bearz A, Nackaerts K, Fennell DA, Kowalski D, Tsao AS, Taylor P, Grosso F, Antonia SJ, Nowak AK, Taboada M, Puglisi M, Stockman PK, Kindler HL. Tremelimumab as second-line or third-line treatment in relapsed malignant mesothelioma (DETERMINE): a multicentre, international, randomised, double-blind, placebo-controlled phase 2b trial. Lancet Oncol. 2017 Sep;18(9):1261-1273. doi: 10.1016/S1470-2045(17)30446-1. Epub 2017 Jul 17.

    PubMed 28729154

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Tremelimumab in people with Unresectable Pleural or Peritoneal Malignant Mesothelioma, run by MedImmune LLC at 104 sites in 19 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 12 inclusion and 19 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 27 Jul 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 104 sites in United States, Italy, Australia, Germany, United Kingdom and 14 more countries. 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 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

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

Are results available for this study?

Yes. Results are posted in the registry (first posted 17 Aug 2017). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

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?

Overall Survival (OS) (time frame: 3 years.). 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 NCT01843374, which also lists 2 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 27 Jul 2026.

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