On October 30, 2025 Calidi Biotherapeutics, Inc. (NYSE American: CLDI) ("Calidi" or the "Company"), a clinical-stage biotechnology company pioneering the development of systemically delivered, targeted genetic medicines, reported the presentation of new data on its first therapeutic candidate from its RedTail platform, CLD-401, at the Society of Immunotherapy for Cancer (SITC) (Free SITC Whitepaper) Annual Meeting.
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CLD-401 is a tumor-tropic oncolytic virus designed to home to metastatic sites after systemic administration, replicate only in tumors cells, induce an immune priming event at the tumor site, and express high levels of IL-15 superagonist, a potent cytokine that induces NK and T-cell responses to the tumor, in the tumor microenvironment (TME).
"The RedTail platform represents a major advance in virotherapy and genetic medicines," said Antonio F. Santidrian, PhD, Chief Scientific Officer and Head of Technical Operations at Calidi. "RedTail allows for systemically administered genetic medicines that avoid immune clearance, are tropic for tumor cells, induce tumor lysis and immunologically prime the TME, and can deliver a genetic payload."
"In our syngeneic models, CLD-401 can reach metastatic sites when administered systemically where it can destroy tumor cells through a novel mechanism that also induces an immune priming effect," added Eric Poma, PhD, Chief Executive Officer. "CLD-401 builds on these mechanisms by also delivering high levels of IL-15 superagonist to the TME to activate a potent T-cell and NK cell response to the tumor."
Calidi is currently conducting IND-enabling studies for CLD-401 and anticipates submitting an Investigational New Drug (IND) application by the end of 2026. The company is also actively pursuing strategic partnerships to accelerate clinical development and broaden the impact of its RedTail platform.
CLD-401 Presentation
Meeting: SITC (Free SITC Whitepaper) 40th Anniversary Annual Meeting, November 7–9, 2025, National Harbor, MD
Title: In Situ Tumor Delivery of IL-15 Superagonist via RedTail Gene Therapy Achieves Durable Tumor Clearance
Abstract Number: 1175
Presentation Time: Friday, November 7, 2025, 12:15–1:45 PM and 5:35–7:00 PM
(Press release, Calidi Biotherapeutics, OCT 30, 2025, View Source [SID1234657145])