Pembrolizumab and Hypofractionated Radiation Therapy for the Treatment of Mucosal Melanoma

Official title

Adjuvant Pembrolizumab and Hypofractionated Radiation Therapy for the Treatment of Mucosal Melanoma

Overview

This is an open-label, single center, one cohort, non-randomized, phase II study. The aim is to evaluate the efficacy and safety of the combination of hypofractionated radiotherapy (HRT) and pembrolizumab on local tumor control in mucosal melanoma patients. Treatment effect will be compared with historical radiation therapy-alone control data.

Interventions

• Drug Pembrolizumab
  Pembrolizumab is commercially available
• Radiation Hypofractionated radiation therapy
  It is preferred to leave at least 48 hours between fractions. Daily imaging to verify accurate set-up is mandatory.

Primary outcome measures

• Local tumor control rate [Time frame: 1 year after completion of treatment (estimated to be 2 years)]

Secondary outcome measures (5)

• Number of treatment-related grade 3 or greater adverse events [Time frame: Baseline through 90 days after end of treatment (estimated to be 15 months)]
• Number of treatment discontinuations due to treatment-related adverse events [Time frame: Through end of treatment (estimated to be 1 year)]
• Relapse-free survival (RFS) [Time frame: At 3 years after completion of treatment (estimated to be 4 years)]
• Distant metastasis-free survival [Time frame: At 3 years after completion of treatment (estimated to be 4 years)]
• Overall survival [Time frame: At 3 years after completion of treatment (estimated to be 4 years)]

Eligibility criteria

Inclusion criteria

• Histologically or cytologically confirmed mucosal melanoma that has undergone surgical resection. Patient must not have received prior radiation therapy within the area of interest.
• At least 16 years of age.
• Eastern Cooperative Oncology Group (ECOG) performance status ≤ 2 (Karnofsky ≥ 70%)
• Normal bone marrow and organ function as defined below:

• Absolute neutrophil count ≥ 1,200/mcL
• Platelets ≥ 100,000/mcL
• Total bilirubin ≤ 1.5 x institutional upper limit of normal (IULN)
• AST(SGOT)/ALT(SGPT) ≤ 3.0 x IULN
• Creatinine clearance > 30 mL/min by Cockcroft-Gault
• The effects of pembrolizumab on the developing human fetus are unknown. For this reason, women of childbearing potential and men must agree to use adequate contraception (hormonal or barrier method of birth control, abstinence) prior to study entry, for the duration of study participation, and 6 months after last dose of pembrolizumab. Should a woman become pregnant or suspect she is pregnant while participating in this study, she must inform her treating physician immediately. Men treated or enrolled on this protocol must also agree to use adequate contraception prior to the study, for the duration of the study, and 6 months after last dose of pembrolizumab.
• Ability to understand and willingness to sign an IRB approved written informed consent document (or that of legally authorized representative, if applicable).

Exclusion criteria

• A history of other malignancy with the exception of malignancies for which all treatment was completed at least 2 years before registration and the patient has no evidence of disease.
• Received radiation therapy within the area of interest.
• Currently receiving any other investigational agents.
• Metastatic disease.
• A history of allergic reactions attributed to compounds of similar chemical or biologic composition to pembrolizumab or other agents used in the study.
• Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, or cardiac arrhythmia.
• Has a diagnosis of immunodeficiency or is receiving systemic steroid therapy or any other form of immunosuppressive therapy within 7 days prior to the first dose of study treatment. The use of up to 10 mg/day of prednisone or equivalent is approved and does not exclude the patient from the trial.
• Active autoimmune disease that has required systemic treatment in past 2 years (i.e., with use of disease modifying agents, > 10 mg of prednisone per day, or immunosuppressive drugs). Replacement therapy (e.g., thyroxine, insulin, or physiologic corticosteroid replacement therapy for adrenal or pituitary insufficiency, etc.) is not considered a form of systemic treatment. The use of up to 10 mg/day of prednisone or equivalent is approved and does not exclude the patient from the trial.
• Has a history of (non-infectious) pneumonitis/Interstitial lung disease that required maintenance steroids (>10 mg of prednisone) or current pneumonitis/interstitial lung disease.
• Has received a live vaccine or live-attenuated vaccination within 30 days of planned treatment start. Administration of killed vaccines is allowed.
• Pregnant and/or breastfeeding. Women of childbearing potential must have a negative pregnancy test within 14 days of study entry.
• Patients with HIV are eligible unless their CD4+ T-cell counts are < 350 cells/mcL or they have a history of AIDS-defining opportunistic infection within the 12 months prior to registration. Concurrent treatment with effective ART according to DHHS treatment guidelines is recommended.

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: No

Study design

Allocation

N/A

Model

Single group

Masking

Open label

Primary purpose

Treatment

Study locations

United States · 1 center

• Washington University School of Medicine — St Louis

Identifiers

NCT: NCT04318717 · 202003124

Primary sources (government registries)

• ClinicalTrials.gov (US NIH)

View this study on ClinicalTrials.gov ↗