iTeos Announces New Data for its Anti-TIGIT Antibody, EOS-448, at the American Society of Hematology Annual Meeting and TIGIT Therapies Digital Summit 2021

• Data from preclinical studies in collaboration with Fred Hutchinson Cancer Research Center will be presented at ASH and provide strong rationale for use of EOS-448 as a single agent and in combination with an immunomodulatory drug in patients with multiple myeloma
  
• Preclinical data shared at TIGIT Therapies Digital Summit highlight evidence for multifaceted mechanism of action of EOS-448

Excerpt from the Press Release:

CAMBRIDGE, Mass. and GOSSELIES, Belgium, Dec. 09, 2021 (GLOBE NEWSWIRE) — iTeos Therapeutics, Inc. (Nasdaq: ITOS), a clinical-stage biopharmaceutical company pioneering the discovery and development of a new generation of highly differentiated immuno-oncology therapeutics for patients, today announced the presentation of new preclinical data for its anti-TIGIT monoclonal antibody, EOS-448, at the 63rd American Society of Hematology (ASH) Annual Meeting & Exposition and the TIGIT Therapies Digital Summit 2021.

“The data we presented this week at the TIGIT Therapies Digital Summit provide further evidence of the multifaceted mechanism of our high affinity, potent anti-TIGIT monoclonal antibody, EOS-448. We presented preclinical data showing activation of immune stimulatory cells is dependent on activating via FcγR, and also show clinically that this activation is translating to depletion of immunosuppressive cells. Furthermore, the upcoming data presentations at ASH demonstrate the synergistic effect of combining an FcγR active anti-TIGIT antibody with an IMiD in a preclinical model of multiple myeloma and provide strong rationale for our ongoing Phase 1/2 trial in this difficult to treat cancer,” said Michel Detheux, Ph.D., president and chief executive officer of iTeos. “These results underscore our enthusiasm for EOS-448 as a potential therapy capable of harnessing the immune system to help improve outcomes for patients with advanced, aggressive cancers. We look forward to progressing our clinical development plan in 2022 in both multiple myeloma and solid tumors with several combinations.” 

ASH 2021:

The Combination of Anti-Tigit and Lenalidomide Promotes Synergistic Myeloma-Specific Immunity after ASCT
Presented by: Simone A. Minnie, Ph.D., Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA
Abstract #: 154087

Preclinical data demonstrating the efficacy of a mouse surrogate EOS-448 as a single agent and in combination with an immunomodulatory imide drug (IMiD) in a preclinical model of multiple myeloma was presented by our collaborator at the Fred Hutchinson Cancer Research Center. The Fc-enabled anti-TIGIT monoclonal antibody elicited effective control of multiple myeloma disease progression, while an Fc-disabled version was inactive, indicating the importance of engaging the FcγR. Furthermore, the Fc-enabled anti-TIGIT antibody demonstrated synergistic activity when combined with an IMiD, a class of drugs that has previously shown clinical activity in multiple myeloma.

TIG-007: Study of EOS884448/GSK4428859A Alone, and in Combination with Iberdomide with or without Dexamethasone, in Participants with Relapsed or Refractory Multiple Myeloma

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