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Olaparib in People With Malignant Mesothelioma

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT03531840
Recruitment Status : Recruiting
First Posted : May 22, 2018
Last Update Posted : October 19, 2020
Information provided by (Responsible Party):
National Institutes of Health Clinical Center (CC) ( National Cancer Institute (NCI) )

Brief Summary:


The drug olaparib may stop cancer cells from fixing damage to their DNA. It has been approved to treat certain cancers in people that were born with a mutation in the BRCA gene. It has not been approved for treating mesothelioma. But some people with mesothelioma have mutations in a gene, BAP1 related to BRCA. Researchers want to see if olaparib can work in patients with mutations in this gene. They also want to see if works on mutations in other genes or patients without any mutations. They want to see if olaparib causes mesothelioma tumors to shrink.


To study the effect of olaparib on mesothelioma.


People ages 18 and older with malignant mesothelioma that has already been treated


Participants will be screened with

Sample of tumor tissue or fluid

Medical history

Physical exam

Blood, heart, and urine tests

Scans and x-rays

Participants will give blood and tissue samples. These will be genetically tested.

The study will be done in 21-day cycles.

Participants will take tables of the study drug 2 times each day. They will get information on what food and drugs to avoid during the study. They will get information about birth control. They will keep a diary of doses and symptoms.

Participants will have blood and urine tests and scans every few weeks.

Participants will be told any important genetic testing results.

Participants will stay in the study until their disease gets worse or the participant or their doctor chooses to stop it.

About 30 days after stopping the study drug, participants will have a follow-up visit. They will have a medical history, physical exam, blood tests, and scans.

Some participants will continue to have scans every 6 weeks.


Condition or disease Intervention/treatment Phase
Mesothelioma Drug: Olaparib Phase 2

Detailed Description:


  • Malignant mesothelioma is an invasive and often fatal neoplasm that arises from mesothelium that lines several organs.
  • Recent studies have identified germline mutations in the gene encoding BRCA1 associated protein-1 (BAP1) which can predispose to mesothelioma
  • In addition to mesothelioma, germline BAP1 mutations confer increased susceptibility for the development of several other tumors including uveal melanoma, cutaneous melanoma, renal cell cancers and possibly other cancers
  • In addition to BAP1, we found several novel germline variants that have previously not been associated with risk of developing mesothelioma.
  • As evidenced by recent data derived from ovarian and prostate cancer patients, mutations in DNA repair genes can define subgroups of cancer patients with distinct vulnerabilities to DNA damage response inhibitors.
  • Olaparib is a PARP inhibitor indicated as monotherapy in patients with deleterious or suspected deleterious germline BRCA mutated
  • Both established and patient derived mesothelioma cell lines with mutated DNA repair genes are sensitive to olaparib.


-Determine the efficacy with respect to objective response rate of olaparib in patients with malignant mesothelioma based on somatic or germline mutation status of DNA repair genes


  • Patients must have progressive, histologically or cytologically confirmed malignant mesothelioma.
  • Age greater than or equal to 18 years
  • Patients must have received prior platinum and pemetrexed based therapies
  • Adequate organ and bone marrow function


  • This is a phase II, single center study of olaparib in subjects with malignant mesothelioma
  • All subjects will take olaparib by mouth twice daily until disease progression or intolerable side effects
  • Subjects will be assessed for safety (continuously) and efficacy (every 6 weeks)
  • Subjects will be analyzed in 3 separate comparison groups according to their mutation status

    • Comparison Group 1: Patients with a germline mutation in DNA repair genes
    • Comparison Group 2: Patients with BAP1 somatic mutations
    • Comparison Group 3: Patients with neither germline mutations nor BAP 1 somatic mutations
  • Up to 30 evaluable subjects will be enrolled

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 40 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Phase II Study of Olaparib in Subjects With Malignant Mesothelioma
Actual Study Start Date : July 11, 2018
Actual Primary Completion Date : December 4, 2019
Estimated Study Completion Date : December 31, 2020

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Mesothelioma
Drug Information available for: Olaparib

Arm Intervention/treatment
Experimental: 1/Olaparib
Twice daily oral olaparib
Drug: Olaparib
all subjects will take olaparib by mouth twice per day until disease progression or unacceptable toxicity

Primary Outcome Measures :
  1. objective response rate [ Time Frame: 6 months after enrollment of last patient ]
    Percentage of subjects overall who experienced partial or complete response. Percentage of subjects with germline DNA repair mutation who experienced partial or complete response. Percentage of subjects with BAP1 somatic mutations who experienced partial or complete response. Percentage of subjects with neither germline DNA repair mutations nor somatic BAP1 mutations who experienced partial or complete response.

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   18 Years to 99 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
  • Patients must have histologically or cytologically malignant mesothelioma confirmed by the NCI Laboratory of Pathology. Patients with pleural, peritoneal, pericardial or tunica vaginalis mesothelioma are eligible.
  • Archival tumor samples must be available and sufficient for diagnostic and genetic testing; if archival sample insufficient for testing, subject must have lesions amenable to biopsy and be willing to undergo biopsy.
  • Patients must have measurable disease.
  • Patients must have progressive disease at study entry
  • Patients must have received prior platinum and pemetrexed based therapies. Response to platinum is not an eligibility criterion for enrollment.
  • Age greater than or equal to 18 years. Because no dosing or adverse event data are currently available on the use of olaparib in patients <18 years of age, children are excluded from this study, but may be eligible for future pediatric trials.
  • ECOG performance status less than or equal to 1.
  • Patients must have a life expectancy of greater than or equal to 16 weeks
  • Patients must have adequate organ and marrow function less than or equal to 5days prior to C1D1 as defined below:

    • leukocytes greater than or equal to 3,000/mcL
    • absolute neutrophil count greater than or equal to greater than or equal to 1,500/mcL without growth factor support
    • platelets greater than or equal to 100,000/mcL
    • hemoglobin greater than or equal to 10 g/dL with no blood transfusion in the past 28 days
    • total bilirubin less than or equal to 1.5 x ULN (unless Gilbert s Disease)
    • AST(SGOT)/ALT(SGPT) less than or equal to 2.5 X institutional upper limit of normal (less than or equal to 5X ULN in the presence of liver metastases)
    • creatinine clearance greater than or equal to 51 mL/min (calculated using the -Cockcroft-Gault formula.
  • Pre-clinical data indicate that olaparib can have adverse effects on embryofetal survival and development. It is further not known whether olaparib or its metabolites are found in seminal fluid. For these reasons:
  • Women of childbearing potential and their partners, who are sexually active, must agree to the use of 2 highly effective forms of contraception in combination (male condom plus one other method or must totally/truly abstain from any form of sexual intercourse. This should be started from the signing of the informed consent, throughout their participation in the study and for at least 1 month after the last dose of olaparib.
  • Male patients must use a condom during treatment and for 3 months after the last dose of olaparib when having sexual intercourse with a pregnant woman or with a woman of childbearing potential. Female partners of male patients should also use a highly effective form of contraception if they are of childbearing potential. Male patients should not donate sperm throughout the period of taking olaparib and for 3 months following the last dose of olaparib.
  • Acceptable birth control methods:

    • Total sexual abstinence i.e., refrain from any form of sexual intercourse in line with the patients usual and/or preferred lifestyle. Abstinence must be for the total duration of the study treatment and for at least 1month (for female patients) or 3 months (for male patients) after the last dose of study treatment. Periodic abstinence (e.g., calendar ovulation, symptothermal, post-ovulation methods) and withdrawal are not acceptable methods of contraception.
    • Vasectomised sexual partner PLUS male condom. With participant assurance that partner received post-vasectomy confirmation of azoospermia.
    • Tubal occlusion PLUS male condom
    • Intrauterine Device PLUS male condom. Provided coils are copper-banded.
    • Etonogestrel implants (e.g., Implanon , Norplant ) PLUS male condom
    • Normal and low dose combined oral pills PLUS male condom
    • Hormonal shot or injection (e.g., Depo-Provera) PLUS male condom
    • Intrauterine system device (e.g., levonorgestrel-releasing intrauterine system -Mirena ) PLUS male condom
    • Norelgestromin/ethinyl estradiol transdermal system PLUS male condom
    • Intravaginal device (e.g., ethinyl estradiol and etonogestrel) PLUS male condom
    • Cerazette (desogestrel) PLUS male condom. Cerazette is currently the only highly efficacious progesterone based pill.
  • Ability of subject to understand and the willingness to sign a written informed consent document.


  • Patients who are receiving any other investigational agents.
  • Patients who have received any previous treatment with a PARP inhibitor, including olaparib.
  • Patients receiving any systemic chemotherapy or radiotherapy (except for palliative reasons) within 3 weeks prior to study treatment
  • Patients with other malignancy documented as occurring within the last 1 year except: adequately treated nonmelanoma skin cancer, curatively treated in situ cancer of the cervix, ductal carcinoma in situ (DCIS), Stage 1, grade 1 endometrial carcinoma, or other solid tumors includinglymphomas (without bone marrow involvement) documented as curatively treated or under control for greater than or equal to 1 year.
  • Patients with features suggestive of MDS/AML on peripheral blood smear.
  • Patients with symptomatic uncontrolled brain metastases. A scan to confirm the absence of brain metastases is not required. The patient can receive a stable dose of corticosteroids before and during the study as long as these were started at least 4 weeks prior to treatment. Patients with spinal cord compression unless considered to have received definitive treatment for this and evidence of clinically stable disease for 28 days.
  • History of allergic reactions or hypersensitivity attributed to compounds of similar chemical or biologic composition to olaparib or its excipients.
  • Patients who have had a whole blood transfusion within 120 days prior to enrollment. (Packed red blood cells and platelet transfusions are acceptable)
  • Patients with persistent toxicities (greater than or equal to CTCAE grade 2) with the exception of alopecia,caused by previous cancer therapy
  • Concomitant use of known strong or moderate CYP3A inhibitors (e.g. itraconazole, telithromycin, clarithromycin, protease inhibitors boosted with ritonavir or cobicistat, indinavir, saquinavir, nelfinavir, boceprevir, telaprevir) or moderate CYP3A inhibitors (e.g. ciprofloxacin, erythromycin, diltiazem, fluconazole, verapamil). The required washout period prior to starting olaparib is 2 weeks.
  • Concomitant use of known strong CYP3A inducers (e.g. phenobarbital, enzalutamide, phenytoin, rifampicin, rifabutin, rifapentine, carbamazepine, nevirapine and St John s Wort) or moderate CYP3A inducers (e.g. bosentan, efavirenz, modafinil). The required washout period prior to starting olaparib is 5 weeks for enzalutamide or phenobarbital and 3 weeks for other agents.
  • Resting ECG with QTcF > 470 msec on 2 or more time points within a 24-hour period or family history of long QT syndrome
  • Patients that have had major surgery within 2 weeks of starting study treatment and patients must have recovered from any effects of any major surgery.
  • Patients unable to swallow orally administered medication and patients with gastrointestinal disorders likely to interfere with absorption of the study medication.
  • Patients considered a poor medical risk due to a serious, uncontrolled medical disorder, non-malignant systemic disease or active, uncontrolled infection. Examples include, but are not limited to, uncontrolled ventricular arrhythmia, recent (within 3 months) myocardial infarction, uncontrolled major seizure disorder, unstable spinal cord compression, superior vena cava syndrome, extensive interstitial bilateral lung disease on High Resolution Computed Tomography (HRCT) scan or any psychiatric disorder that prohibits obtaining informed consent.
  • Pregnant women are excluded from this study because olaparib has the potential for teratogenic or abortifacient effects. Women must either be post-menopausal or must have a negative pregnancy test (urine or serum) less than or equal to 28 days prior to enrollment and confirmed on day 1 of cycle 1 of study therapy. Postmenopausal is defined as:

Amenorrheic for 1 year or more following cessation of exogenous hormonaltreatments

Luteinizing hormone (LH) and Follicle stimulating hormone (FSH) levels in the post-menopausal range for women under 50 years of age

radiation-induced oophorectomy with last menses >1 year ago

chemotherapy-induced menopause with >1-year interval since last menses

surgical sterilisation (bilateral oophorectomy or hysterectomy)

  • Because there is an unknown but potential risk for adverse events in nursing infants secondary to treatment of the mother with olaparib, breastfeeding should be discontinued if the mother is treated with olaparib.
  • Immunocompromised patients are excluded.
  • Patients who are known to be serologically positive for human immunodeficiency virus (HIV). This includes HIV patients on antiretroviral therapy due to the potential for pharmacokinetic interactions with olaparib.
  • Patients with known active hepatitis (i.e. Hepatitis B or C) due to risk of transmitting the infection through blood or other body fluids
  • Previous allogeneic hematopoietic stem cell transplant, allogeneic bone marrow transplant or double umbilical cord blood transplant (duCBT)

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT03531840

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Contact: Cathy I Wagner, R.N. (240) 858-3159

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United States, Maryland
National Institutes of Health Clinical Center Recruiting
Bethesda, Maryland, United States, 20892
Contact: For more information at the NIH Clinical Center contact National Cancer Institute Referral Office    888-624-1937      
Sponsors and Collaborators
National Cancer Institute (NCI)
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Principal Investigator: Raffit Hassan, M.D. National Cancer Institute (NCI)
Additional Information:
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Responsible Party: National Cancer Institute (NCI) Identifier: NCT03531840    
Other Study ID Numbers: 180097
First Posted: May 22, 2018    Key Record Dates
Last Update Posted: October 19, 2020
Last Verified: July 14, 2020

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by National Institutes of Health Clinical Center (CC) ( National Cancer Institute (NCI) ):
DNA Mismatch Repair
Additional relevant MeSH terms:
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Neoplasms, Glandular and Epithelial
Neoplasms by Histologic Type
Neoplasms, Mesothelial
Poly(ADP-ribose) Polymerase Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Antineoplastic Agents