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- W4308402910 abstract "<h3>Background</h3> CD40 agonist mAbs can enhance the efficacy of checkpoint blockade in preclinical models and can functionally revive PD-1<sup>hi</sup> exhausted T cells. This Phase 1 study examined safety, clinical activity, and pharmacodynamics of CDX-1140 as monotherapy or in combination with other agents (NCT03329950). We now report the completed results from Part 3 of the study, combination with anti-PD-1 mAb pembrolizumab. <h3>Methods</h3> Patients with advanced solid tumors and documented disease progression on a single prior anti-PD-1/L1 based regimen were enrolled. In dose-escalation (DE) cohorts, CDX-1140 was administered at 0.72 mg/kg and 1.5 mg/kg. Expansion cohorts (EX) in non-small cell lung cancer (NSCLC) and squamous cell carcinoma of head and neck (SCCHN) evaluated CDX-1140 1.5 mg/kg. Treatment was q3w co-administered with pembrolizumab 200 mg in both DE and EX. <h3>Results</h3> 10 patients were treated in DE (renal cell carcinoma n=2, SSCHN n=2, n=1 for NSCLC, endometrial cancer, MSI<sup>hi</sup>-CRC, ocular melanoma, esophageal adenocarcinoma, MSI<sup>hi</sup>-cholangiocarcinoma) and 15 patients treated in EX; NSCLC (n=9) and SCCHN (n=6). The median number of prior regimens was 3. Treatment was generally well tolerated, with most treatment-related AEs (TRAE) being grade 1 or 2. The most frequent TRAE at the CDX-1140 1.5 mg/kg dose level (n=21) were arthralgia (62%), fatigue (62%), nausea (48%), diarrhea (48%), vomiting (43%), myalgia (43%), fever (38%), chills (38%), AST increase (38%), bilirubin increase (24%), ALT increase (19%), and cytokine release syndrome (CRS) (19%). Across Part 3, there was 1 complete response (CR) in a patient with oropharyngeal cancer (HPV<sup>+</sup> and PD-L1 status unknown); 9 additional patients had stable disease (SD), including 4 with SCCHN and 4 with NSCLC. The patient achieving CR received 4 prior regimens (including chemotherapy, pembrolizumab, and cetuximab), discontinued study therapy after 2 doses due to arthralgia (grade 3) and CRS (grade 2), and initially demonstrated a partial response that evolved into CR, with the response ongoing at 12+ months without further anti-tumor treatment. Of the 4 SCCHN with SD, 2 had target lesions shrinkage (-15% and -18%) and 2 had no change. One NSCLC patient has SD for 10+ months with a nadir in target lesions of -15%. Part 3 biomarker data will be presented. <h3>Conclusions</h3> CDX-1140 in combination with pembrolizumab had an acceptable safety profile. Evidence of clinical benefit was most evident in patients with SCCHN, all of whom had progressive disease on prior anti-PD-1/L1 based therapies. Further studies are warranted. <h3>Trial Registration </h3> NCT03329950 <h3>Ethics Approval</h3> The study was reviewed and approved by the following institutional review boards: Providence Health & Services Institutional Review Board for Earle A. Chiles Research Institute/Providence Cancer Institute; approval number/ID: PHS IRB #2017000532 WCG-IRB for Gabrail Cancer Center, Georgia Cancer Specialists, HonorHealth Research Institute, and Nebraska Cancer Specialists; approval number/ID: 20172645 Rhode Island Hospital IkRB#1 for Legorreta Cancer Center at Brown University/Rhode Island Hospital/Lifespan Cancer Center; approval number/ID: LS-P-Camp Office of Regulatory Affairs of the University of Pennsylvania for Hospital of the University of Pennsylvania; approval number/ID: UPCC 18917 Memorial Sloan Kettering Cancer Center Institutional Review Board/Privacy Board; approval number/ID: 18-225 Participants gave informed consent before taking part in the study." @default.
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- W4308402910 date "2022-11-01" @default.
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- W4308402910 title "596 Results from a phase 1 study of CDX-1140, a fully human anti-CD40 agonist monoclonal antibody (mAb), in combination with pembrolizumab" @default.
- W4308402910 doi "https://doi.org/10.1136/jitc-2022-sitc2022.0596" @default.
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