Immune-Onc Therapeutics to Present Preclinical Data for IO-108, a Novel Antagonist Antibody Targeting LILRB2 (ILT4) in Solid Tumors, at SITC 2020

Nov. 9, 2020 13:00 UTC



PALO ALTO, Calif.--(BUSINESS WIRE)-- Immune-Onc Therapeutics, Inc. (“Immune-Onc”), a clinical-stage cancer immunotherapy company, will present preclinical data evaluating IO-108, a novel antagonist antibody targeting the myeloid checkpoint Leukocyte Immunoglobulin-Like Receptor B2 (LILRB2, also known as ILT4) for the treatment of solid tumors, at The Society for Immunotherapy of Cancer (SITC) 35th Anniversary Annual Meeting & Pre-Conference Programs (SITC 2020). The full meeting takes place virtually November 9-14, 2020.

The poster (Abstract #686) titled, “Preclinical Characterization of a Novel Therapeutic Antibody Targeting LILRB2”, will be presented on Thursday, Nov. 12, from 4:50-5:20 p.m. EST and on Saturday, Nov. 14, from 1-1:30 p.m. EST.

“Immune-Onc’s unique scientific insights in myeloid cell checkpoints, with a particular focus on the Leukocyte Immunoglobulin-Like Receptor subfamily B (LILRB), have led to a promising and differentiated immunotherapy pipeline,” said Charlene Liao, Ph.D., co-founder and CEO of Immune-Onc. “The preclinical data to be presented at SITC demonstrate the exciting potential of IO-108, a novel therapeutic agent targeting LILRB2. We look forward to advancing IO-108 into the clinic in 2021 to evaluate its safety and efficacy in patients with solid tumors.”

IO-108 binds to LILRB2 with high affinity and specificity and blocks the interaction of LILRB2 with ligands that are involved in cancer-associated immune suppression including HLA-G, ANGPTLs and SEMA4A. In assays with primary cells, IO-108 enhances pro-inflammatory activation of immune cells and induces differentiation of monocytes into activated dendritic cells. In ex vivo functional studies with samples from solid tumor patients, IO-108 reprograms immune suppressive myeloid cells to a pro-inflammatory phenotype, thereby enhancing T-cell activation. Together these data suggest that IO-108 has potential therapeutic benefit in solid tumors not responsive to T-cell checkpoint inhibitors. The company plans to file an Investigational New Drug (IND) application for IO-108 with the U.S. Food and Drug Administration in Q2 2021.


LILRB2, also known as ILT4, is expressed mostly on myeloid cells, including monocytes, dendritic cells, macrophages, and neutrophils. In solid tumors, interaction of LILRB2 with tumor microenvironment (TME) relevant ligands, including HLA-G, ANGPTLs, and SEMA4A, makes myeloid cells pro-tumorigenic (tolerating or promoting tumor growth) and promotes tumor immune evasion.


Immune-Onc Therapeutics, Inc. (“Immune-Onc”) is a clinical-stage cancer immunotherapy company dedicated to the discovery and development of novel myeloid checkpoint inhibitors for cancer patients. Headquartered in Palo Alto, California, Immune-Onc has assembled a diverse team with deep expertise in drug development and proven track records of success at leading biotechnology companies.

The company aims to translate unique scientific insights in myeloid cell biology and immune inhibitory receptors to discover and develop first-in-class biotherapeutics that disarm immune suppression in the tumor microenvironment. Immune-Onc has a promising pipeline with a current focus on targeting the Leukocyte Immunoglobulin-Like Receptor subfamily B (LILRB) of myeloid checkpoints. The company has strategic research collaborations with The University of Texas, Albert Einstein College of Medicine, and Memorial Sloan Kettering Cancer Center, and has invested in proprietary models, assays and tools to interrogate the biology and translate this cutting-edge research into the development of novel therapies.

Immune-Onc’s lead program IO-202, a first-in-class antibody targeting LILRB4 (also known as ILT3), is being developed to treat acute myeloid leukemia (AML) and other cancers. IO-202 is the first T-cell activator for AML. In September 2020, Immune-Onc initiated a Phase I trial evaluating IO-202 in blood cancers, AML and chronic myelomonocytic leukemia (CMML). The company plans to evaluate IO-202 in solid tumors and in other forms of blood cancer in the near future. In addition to IO-202, Immune-Onc’s pipeline includes IO-108, an antibody targeting LILRB2 (also known as ILT4) in the IND-enabling stage of development. Additional preclinical candidates focused on myeloid checkpoints include an anti-LAIR1 antibody and multiple undisclosed programs for solid tumors and hematologic malignancies. For more information, please visit and follow us on Twitter and LinkedIn.


Tara Cooper
The Grace Communication Group


Source: Immune-Onc Therapeutics, Inc.

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