Immune checkpoint blockade has improved outcomes across tumor types; little is known about the efficacy of these agents in rare tumors. We report the results of the (nonpancreatic) neuroendocrine neoplasm cohort of SWOG S1609 dual anti-CTLA-4 and anti-PD-1 blockade in rare tumors (DART).Experimental Design: We performed a prospective, openlabel, multicenter phase II clinical trial of ipilimumab plus nivolumab across multiple rare tumor cohorts, with the (nonpancreatic) neuroendocrine cohort reported here. Response assessment by grade was not prespecified. The primary endpoint was overall response rate [ORR; RECIST v1.1; complete response (CR) and partial response (PR)]; secondary endpoints included progression-free survival (PFS), overall survival (OS), stable disease >6 months, and toxicity.Results: Thirty-two eligible patients received therapy; 18 (56%) had high-grade disease. Most common primary sites were gastrointestinal (47%; N ¼ 15) and lung (19%; N ¼ 6). The overall ORR was 25% [95% confidence interval (CI) 13-64%; CR, 3%, N ¼ 1; PR, 22%, N ¼ 7]. Patients with high-grade neuroendocrine carcinoma had an ORR of 44% (8/18 patients) versus 0% in low/ intermediate grade tumors (0/14 patients; P ¼ 0.004). The 6-month PFS was 31% (95% CI, 19%-52%); median OS was 11 months (95% CI, 6-¥). The most common toxicities were hypothyroidism (31%), fatigue (28%), and nausea (28%), with alanine aminotransferase elevation (9%) as the most common grade 3/4 immune-related adverse event, and no grade 5 events.Conclusions: Ipilimumab plus nivolumab demonstrated a 44% ORR in patients with nonpancreatic high-grade neuroendocrine carcinoma, with 0% ORR in low/intermediate grade disease.

SUMMARY Importance KRAS mutations are very common in pancreatic cancer, but directly targeting the KRAS protein has thus far been unsuccessful. The aim of this trial was to block the MEK and PI3K/AKT pathways downstream of the KRAS protein as an alternate treatment strategy to slow cancer growth and prolong survival. This was the first cooperative group trial to evaluate this strategy using molecularly targeted oral combination therapy for the treatment of chemotherapy refractory pancreatic cancer. Objective SWOG S1115 was a randomized phase 2 study of selumetinib and MK-2206 versus modified FOLFOX in patients who failed gemcitabine-based therapy. Design, Setting, and Participants Between September 2012 and May 2014, 137 patients with metastatic pancreatic adenocarcinoma who failed gemcitabine-based chemotherapy were randomized to selumetinib plus MK-2206 or mFOLFOX. Patients were randomized in a 1:1 fashion and stratified according to duration of prior systemic therapy and presence of liver metastases. Interventions Patients received selumetinib 100 mg orally per day plus MK-2206 135 mg orally once per week or mFOLFOX (oxaliplatin 85 mg/m2 intravenous and 5-fluorouracil 2,400 mg/m2 intravenous infusion over 46–48 hours) on days 1 and 15 with each cycle being 28 days. Main Outcomes and Measures The primary endpoint of the study was overall survival. Secondary objectives included evaluating toxicities, objective tumor response and progression free survival (PFS). Results Median OS was shorter in the experimental arm (3.9 vs 6.7 months, HR=1.37, p=0.15). PFS was also inferior in the experimental arm (HR=1.61, p=0.02). One vs five patients had a partial response and 12 vs 14 patients had stable disease in the selumetinib plus MK-2206 arm versus (vs) mFOLFOX. Grade 3 or higher toxicities were observed in 39 patients treated with selumetinib and MK-2206 vs 23 patients treated with mFOLFOX. More patients on the experimental arm discontinued therapy due to adverse events, as well. Conclusions and Relevance Although, dual targeting of MEK and PI3K/AKT pathways downstream of KRAS by selumetinib plus MK-2206 did not improve overall survival in patients who failed gemcitabine-based chemotherapy, this was the first randomized prospective evaluation of mFOLFOX in the U.S. population which showed comparable results to CONKO-003 and PANCREOX. Trial Registration ClinicalTrials.gov, number NCT01658943

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PURPOSE Resistance to immune checkpoint inhibition (ICI) in advanced non–small-cell lung cancer (NSCLC) represents a major unmet need. Combining ICI with vascular endothelial growth factor (VEGF)/VEGF receptor inhibition has yielded promising results in multiple tumor types. METHODS In this randomized phase II Lung-MAP nonmatch substudy (S1800A), patients ineligible for a biomarker-matched substudy with NSCLC previously treated with ICI and platinum-based chemotherapy and progressive disease at least 84 days after initiation of ICI were randomly assigned to receive ramucirumab plus pembrolizumab (RP) or investigator's choice standard of care (SOC: docetaxel/ramucirumab, docetaxel, gemcitabine, and pemetrexed). With a goal of 130 eligible patients, the primary objective was to compare overall survival (OS) using a one-sided 10% level using the better of a standard log-rank (SLR) and weighted log-rank (WLR; G[rho = 0, gamma = 1]) test. Secondary end points included objective response, duration of response, investigator-assessed progression-free survival, and toxicity. RESULTS Of 166 patients enrolled, 136 were eligible (69 RP; 67 SOC). OS was significantly improved with RP (hazard ratio [80% CI]: 0.69 [0.51 to 0.92]; SLR one-sided P = .05; WLR one-sided P = .15). The median (80% CI) OS was 14.5 (13.9 to 16.1) months for RP and 11.6 (9.9 to 13.0) months for SOC. OS benefit for RP was seen in most subgroups. Investigator-assessed progression-free survival (hazard ratio [80% CI]: 0.86 [0.66 to 1.14]; one-sided SLR, P = .25 and .14 for WLR) and response rates (22% RP v 28% SOC, one-sided P = .19) were similar between arms. Grade ≥ 3 treatment-related adverse events occurred in 42% of patients in the RP group and 60% on SOC. CONCLUSION This randomized phase II trial demonstrated significantly improved OS with RP compared with SOC in patients with advanced NSCLC previously treated with ICI and chemotherapy. The safety was consistent with known toxicities of both drugs. These data warrant further evaluation.