Pembrolizumab + Idelalisib for Lung Cancer Study

This is a phase 1b/2 study to determine the safety and effectiveness of the combination of pembrolizumab and idelalisib in NSCLC patients whose disease has stopped responding to immune therapy. This study is being done to see if adding another immune modulator (idelalisib) to standard pembrolizumab will increase response rates, compared to the response seen with pembrolizumab alone.

This is a phase 1b/2 study to determine the safety and effectiveness of the combination of pembrolizumab and idelalisib in NSCLC patients whose disease has stopped responding to immune therapy. Pembrolizumab is an anti-PD-1 immunotherapy that is given intravenously and is approved for treatment of malignant NSCLC. Idelalisib is the first-in-class oral PI3K-δ inhibitor that is approved for treatment of certain forms of leukemia and lymphoma.

Immune checkpoint inhibitors (such as anti-PD-1) are effective in treating NSCLC as a single agent, but overall response isn't optimal; overall response rates (ORR) are only \~20% on average. The goal of this study is to see whether combining standard therapy with additional immune modulators will increase response rates, compared to the response seen with pembrolizumab monotherapy.

Eligibility Criteria:
All subjects must have documented metastatic or recurrent NSCLC from biopsy. They must have failed or progressed on platinum-based chemotherapy (e.g. cisplatin, carboplatin) as well as immune checkpoint inhibitor therapy (e.g nivolumab or pembrolizumab). Patients with EGFR/ALK mutations/translocations must have failed or progressed on small molecule inhibitor therapies (e.g. erlotinib, afatinib, etc.).

Inclusion Criteria:

* Have at least one measurable lesion
* Have an ECOG Performance Status of 1 or less
* Demonstrate adequate organ function as defined in the protocol.
* Female subjects of childbearing potential must have a negative pregnancy test before starting treatment; they must also be willing to use two methods of birth control or abstain from heterosexual activity for the duration of the study.
* Male subjects must agree to use an adequate method of contraception starting with the first dose of study therapy through the duration of the study.

Exclusion Criteria:

* Is currently receiving study drug in another trial; or has participated in an investigational drug study within 3 weeks of the first dose of treatment.
* Is within 3 weeks of most recent chemotherapy.
* Has a history of hypersensitivity to pembrolizumab or idelalisib, or any of their excipients.
* Has known active central nervous system (CNS) metastases and/or carcinomatous meningitis. Subjects with previously treated, stable, brain metastases may participate; carcinomatous meningitis is excluded regardless of clinical stability.
* Has known history of non-infectious pneumonitis that required steroid use or has current pneumonitis.
* Has a known history of active TB (Bacillus Tuberculosis)
* Has active autoimmune disease that has required treatment; known history of Human Immunodeficiency Virus (HIV); known active Hepatitis B or Hepatitis C.
* Has an active infection requiring systemic therapy.
* Is pregnant or breastfeeding, or expecting to conceive or father children within the projected duration of the trial