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About
This study was originally designed as a multicenter, double-blind, randomized, parallel-group study, using a placebo control or amatuximab 5 milligrams per kilogram (mg/kg), administered weekly, designed to evaluate the safety and efficacy of amatuximab in combination with pemetrexed and cisplatin in participants with unresectable Malignant Pleural Mesothelioma (MPM) who have not received prior systemic therapy.
Per a business decision made by the Sponsor, participants who were randomized to amatuximab and were still on active treatment at the time of the protocol amendment may have consented to continue to receive weekly treatment with amatuximab until disease progression or intolerable toxicity at the discretion of the principal investigator. Participants randomized to placebo or who were in follow-up at the time of the amendment have been discontinued from the study.
Enrollment
Sex
Ages
Volunteers
Inclusion criteria
Are at least 18 years of age at the time of informed consent
Have confirmed diagnosis of MPM with the following characteristics:
Have measurable disease at Screening by computed tomography (CT) (or magnetic resonance imaging [MRI]) as defined by at least 1 lesion of greater than or equal to 1.5 cm in the longest diameter for a non-lymph node or greater than or equal to 1.5 cm in the short-axis diameter for a lymph node that is serially measurable according to the modified RECIST criteria
Have other significant medical conditions well-controlled and stable in the opinion of the investigator for at least 30 days prior to Day 1
Have an Eastern Cooperative Oncology Group (ECOG) Performance Status 0 or 1 at Screening
Have a life expectancy of at least 3 months, as estimated by the investigator
Have adequate organ reserve as determined by laboratory test results obtained within 2 weeks prior to Study Day 1 as indicated below:
Have a calculated serum creatinine clearance greater than or equal to 45 mL/min using the Cockcroft-Gault equation
Participants of childbearing potential must be surgically sterile or consent to use a highly effective method of contraception throughout the study period. All females will be considered to be of childbearing potential unless they are postmenopausal (amenorrheic for at least 12 consecutive months, in the appropriate age group, and without other known or suspected cause) or have been sterilized surgically (ie, bilateral tubal ligation, total hysterectomy, or bilateral oophorectomy, all with surgery at least 1 month before dosing). If a participant of childbearing potential is neither surgically sterile nor postmenopausal, highly effective contraceptive measures must start either prior to or at Screening and continue throughout the entire study period and for at least 6 months after the last dose of chemotherapy and at least 30 days after the last dose of Test Article (amatuximab or placebo) is administered (whichever is later). A highly effective method of contraception is defined as one that results in a low failure rate (that is, less than 1% per year) when used consistently and correctly. Periodic abstinence, the rhythm method, the withdrawal method, condoms, and diaphragms are not acceptable methods of contraception. Women of childbearing potential must also refrain from egg cell donation for 6 months after the final dose of investigational product
Male participants must have had a successful vasectomy (confirmed azoospermia) or they and their female partners must meet the criteria above (that is, not of childbearing potential or practicing highly effective contraception throughout the study period and for 6 months after discontinuation of chemotherapy and for 5 weeks after Test Article (amatuximab or placebo) discontinuation (whichever is later). No sperm donation is allowed during the study period and for 90 days after Test Article discontinuation
Be willing and able to provide written informed consent
Be willing and able to comply with all aspects of the protocol
Participants who were enrolled in the study and randomized to the amatuximab treatment arm may, at the discretion of the principle investigator (PI), consent to continue to receive amatuximab therapy until disease progression, intolerable toxicity, or withdraw of consent
Exclusion criteria
Have any history of the following:
Currently have mesothelioma of the sarcomatous type, mixed histologic disease, or have malignant peritoneal mesothelioma
Have confirmed presence of central nervous system metastases
Active viral hepatitis or active human immunodeficiency virus infection
Have evidence of any other serious systemic disease, including active bacterial or fungal infection, or any medical condition that, in the opinion of the investigator(s) could affect the participant's safety or interfere with the study assessments
Clinically significant heart disease (eg, congestive heart failure of New York Heart Association Class 3 or 4, angina not well controlled by medication, or myocardial infarction within 6 months)
Electrocardiogram (ECG) demonstrating clinically significant arrhythmias (Note: participants with chronic atrial arrhythmia, ie, atrial fibrillation or paroxysmal supraventricular tachycardia, are eligible). A clinically significant ECG abnormality, including a marked prolonged QT/QTc interval (eg, a repeated demonstration of a QTc interval of greater than 500 ms)
Have known intolerance to the Test Article (ie, documented hypersensitivity AE to prior monoclonal antibody therapy, or to amatuximab or any of its excipients)
Pregnant and/or lactating females are excluded; a negative beta-human chorionic gonadotropin [B-hCG]) is required during Screening, and a separate local assessment is required if a negative screening pregnancy test was obtained more than 72 hours before the first dose of Test Article
Have any medical or other condition that in the opinion of the investigator(s) would preclude the participant's participation in a clinical study
Are scheduled for debulking surgery during the study
Are currently enrolled in another clinical study or used any investigational drug or device within 30 days (or 5 x the half-life of the investigational drug/device, whichever is longer) preceding informed consent
Participants previously randomized to placebo
Participants who have not signed the updated informed consent form associated with this amendment 2
Participants who have radiographic or clinical disease progression or intolerable toxicity such that ongoing amatuximab treatment through this study is not appropriate
Primary purpose
Allocation
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Masking
124 participants in 2 patient groups
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Data sourced from clinicaltrials.gov
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