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GB1275 Monotherapy and in Combination With an Anti-PD1 Antibody in Patients With Specified Advanced Solid Tumors or in Combination With Standard of Care in Patients With Metastatic Pancreatic Adenocarcinoma

ABSTRACT: This first-in-human (FIH ) study is an open-label, multicenter study that consists of a Phase 1 Dose Escalation/Expansion phase of GB1275 monotherapy or in combination with Anti-PD-1 Antibody or in combination with Standard of Care in Patients with Metastatic Pancreatic Adenocarcinoma followed by a Phase 2 Basket Expansion phase in Patients with Specified Metastatic Solid Tumors

DISEASE(S): Adenocarcinoma,Phase 1: Advanced Solid Tumors, Metastatic Pancreatic Adenocarcinoma phase 2: Specified Metastatic Solid Tumors,Pancreatic Adenocarcinoma,Gastric Adenocarcinoma,Carcinoma,Triple Negative Breast Neoplasms,Small Cell Lung Carcinoma,Triple Negative Breast Cancer,Urothelial Carcinoma,Lung Neoplasms,Carcinoma, Squamous Cell,Squamous Cell Carcinoma Of Head And Neck,Gastroesophageal Junction Adenocarcinoma,Microsatellite Stable Colorectal Cancer,Nsclc,Esophageal Adenocarcinoma,Phase 1: Advanced Solid Tumors, Metastatic Pancreatic Adenocarcinomaphase 2: Specified Metastatic Solid Tumors,Non-small Cell Lung Cancer,Castration-resistant Prostate Cancer,Renal Cell Carcinoma,Small-cell Lung Cancer,Head And Neck Squamous Cell Carcinoma,Hepatocellular Carcinoma,Esophageal Squamous Cell Carcinoma

PROVIDER: 2314033 | ecrin-mdr-crc |

REPOSITORIES: ECRIN MDR

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Project description:PurposeAnti-programmed cell death protein 1 (PD1)±anti-cytotoxic T-lymphocyte associated protein 4 (CTLA4) immune checkpoint inhibitors (ICIs) are standard therapeutic options for metastatic melanoma. We assessed whether biologic subtype according to primary tumor type or genomic subtype can function as predictive biomarkers for anti-PD1±anti-CTLA4 ICI in patients with advanced melanoma.MethodsWe performed a single-center retrospective cohort analysis of patients who received anti-PD1±anti-CTLA4 ICI for advanced melanoma between 2012 and 2019. Primary tumor type, BRAF and NRAS mutation status, and other covariates were abstracted from chart review. Log-rank tests and multivariable Cox regression models were used to assess differences in clinical progression-free (cPFS) and overall survival (OS).ResultsWe identified 230 patients who received 249 lines of anti-PD1±anti-CTLA4 ICI for unresectable or metastatic disease. Of these patients, 74% were cutaneous, 11% mucosal, 8% unknown primary and 7% acral. BRAF and NRAS mutations were identified in 35% and 28% of patients, respectively. In multivariable analyses of the entire cohort, acral or mucosal primary tumor type, >3 metastatic sites, elevated LDH were predictive of shorter cPFS and OS. Combination ICI therapy was associated with longer cPFS (HR 0.57, 95% CI 0.38 to 0.86, p=0.007) and OS (HR 0.42, 95% CI 0.28 to 0.65, p<0.001). Combination ICI was significantly associated with longer OS in unknown primary and mucosal melanoma. There was a non-significant trend toward longer OS with anti-PD1+anti-CTLA4 in cutaneous melanoma, but not in acral melanoma. In multivariable analyses, combination ICI was associated with longer OS in NRAS (HR 0.24, 95% CI 0.10 to 0.62, p=0.003, n=69) and BRAF V600E/K (HR 0.47, 95% CI 0.24 to 0.90, p=0.024, n=86) mutant melanoma but not BRAF/NRAS wild-type (n=94) melanoma.ConclusionsIn our cohort, primary melanoma tumor type and genomic subtype were independent predictive markers of cPFS and OS for patients with metastatic melanoma receiving anti-PD1 ICI. Primary tumor type and genomic subtype-including NRAS-should be further evaluated in prospective clinical trials to determine their value as predictive markers. Biologic subtypes may facilitate clinical decision-making when recommending combination ICI treatment (anti-PD1±anti-CTLA4) versus anti-PD1 alone for patients with metastatic melanoma.

Dataset Information

GB1275 Monotherapy and in Combination With an Anti-PD1 Antibody in Patients With Specified Advanced Solid Tumors or in Combination With Standard of Care in Patients With Metastatic Pancreatic Adenocarcinoma

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