Core Insights - Immutep Limited, a late-stage immunotherapy company, announced that three abstracts for clinical trials of its MHC Class II agonist, eftilagimod alfa, have been accepted for presentation at the ESMO Congress 2025 in Berlin, Germany [1][2]. Group 1: Clinical Trials and Presentations - A Proffered Paper oral presentation will detail results from the EFTISARC-NEO Phase II trial in resectable soft tissue sarcoma, scheduled for October 19, 2025 [2]. - Data from the INSIGHT-003 Phase I trial in first-line non-small cell lung cancer (1L NSCLC) will be presented as a poster on October 18, 2025 [2]. - An abstract on the pivotal TACTI-004 Phase III trial in 1L NSCLC has been accepted for a Trials in Progress ePoster presentation [2]. Group 2: Company Overview - Immutep is focused on developing novel immunotherapies for cancer and autoimmune diseases, particularly leveraging the LAG-3 pathway to stimulate or suppress immune responses [4]. - The company aims to provide innovative treatment options and maximize shareholder value through its diversified product portfolio [4].

Core Insights - Immutep Limited's investigator-initiated EFTISARC-NEO Phase II trial has successfully met its primary endpoint, demonstrating a significant increase in tumour hyalinization/fibrosis in patients with resectable soft tissue sarcoma (STS) when treated with eftilagimod alfa (efti) combined with radiotherapy and KEYTRUDA® [1][7]. Company Overview - Immutep is a late-stage biotechnology company focused on developing innovative immunotherapies for cancer and autoimmune diseases, particularly leveraging the Lymphocyte Activation Gene-3 (LAG-3) pathway [7]. - The company is pioneering the understanding and advancement of therapeutics related to LAG-3, aiming to provide novel treatment options for patients and maximize shareholder value [7]. Trial Details - The EFTISARC-NEO trial showed a median of 50% tumour hyalinization/fibrosis in a preliminary analysis of 21 patients, significantly exceeding the prespecified median of 35% [3]. - The trial is primarily funded by a grant from the Polish government, with a total enrollment of 40 patients completed in January 2025 [3][4]. Medical Significance - Tumour hyalinization/fibrosis serves as an early surrogate endpoint linked to improved overall survival and recurrence-free survival in STS patients [2]. - STS is classified as an orphan disease with a high unmet medical need and poor prognosis, with an estimated 13,520 new cases and 5,420 deaths in the U.S. in 2025 [4]. Eftilagimod Alfa (efti) Profile - Efti is a proprietary soluble LAG-3 protein and MHC Class II agonist that stimulates both innate and adaptive immunity, enhancing the immune response against cancer [5]. - Efti is under evaluation for various solid tumours, including non-small cell lung cancer and head and neck squamous cell carcinoma, and has received Fast Track designation from the FDA for certain indications [6].