Pembrolizumab and Afatinib in Patients With Non-small Cell Lung Cancer With Resistance to Erlotinib

Inclusion Criteria

• Incurable, advanced or metastatic/recurrent non-small cell lung cancer with EGFR activating mutations (exon 19 del, exon 21 L858R, L861Q, G718X); who have radiologic and/or clinically progressive disease on erlotinib at any point during the patient's cancer treatment as determined by the Investigator
• Be willing and able to provide written informed consent for the trial
• Have a life expectancy of at least 3 months
• Have measurable disease based on Response Evaluation Criteria in Solid Tumors (RECIST) 1.1
• Adequate archival tissue for determination of EGFR-mutation status and PD-L1 status with a leftover cell block (or equivalent) for additional immune correlates from a tumor lesion biopsied in the last 60 days that has not been previously irradiated occurring: 1) after progression on erlotinib and no intervening systemic treatment between biopsy and initiation of MK-3475 and afatinib or amenable to repeat biopsy
• Have a performance status of 0 or 1 on the Eastern Cooperative Oncology Group (ECOG) (Zubrod) performance scale
• Be willing to consent for biopsy at baseline (if inadequate archival tissue per inclusion criteria above) and an on treatment biopsy; have a tumor in a location that in the opinion of the investigator that is amenable to biopsy or have provided tissue for PD-L1 and other biomarker analysis from a newly obtained (within 60 days) formalin fixed tumor tissue from a recent biopsy of a tumor lesion not previously irradiated; no systemic antineoplastic therapy may be administered between the PD- L1 biopsy and initiating study medication; fine needle aspirates are not acceptable; needle or excisional biopsies, or resected tissue is required; the tissue sample must be received by the central vendor (Labcorp) and evaluated for adequacy prior to starting therapy
• There is no limit to the number of prior treatments for this phase I trial
• Absolute neutrophil count (ANC) >= 1,500/mcL
• Platelets >= 100,000/mcL
• Hemoglobin >= 9 g/dL or >= 5.6 mmol/L
• Serum creatinine OR measured or calculated creatinine clearance (glomerular filtration rate [GFR] can also be used in place of creatinine or creatinine clearance [CrCl]) = = 60 mL/min for subject with creatinine levels > 1.5 x institutional ULN
• Creatinine clearance should be calculated per institutional standard
• Serum total bilirubin = 1 year
• Male subjects should agree to use an adequate method of contraception starting with the first dose of study therapy through 120 days after the last dose of study therapy

Exclusion Criteria

• Is currently participating in or has participated in a study of an investigational agent or using an investigational device within 4 weeks of the first dose of treatment
• 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 trial treatment
• Has had a prior monoclonal antibody within 4 weeks prior to study day 1 or who has not recovered (i.e., =< grade 1 or at baseline) from adverse events due to agents administered more than 4 weeks earlier; denosumab is allowed as long as not < 1 week prior to study day 1 and not administered on day of MK-3475 infusion
• Has had prior chemotherapy or targeted small molecule therapy within 2 weeks prior to study day 1 or who has not recovered (i.e., =< grade 1 or at baseline) from adverse events due to a previously administered agent
• Note: subjects with =< grade 2 neuropathy are an exception to this criterion and may qualify for the study
• Note: if subject received major surgery, they must have recovered adequately from the toxicity and/or complications from the intervention prior to starting therapy
• Has a known additional malignancy that is progressing or requires active treatment; exceptions include basal cell carcinoma of the skin, squamous cell carcinoma of the skin, or in situ cervical cancer that has undergone potentially curative therapy
• Has know