On October 15, 2024 MAIA Biotechnology, Inc., (NYSE American: MAIA) ("MAIA", the "Company"), a clinical-stage biopharmaceutical company developing targeted immunotherapies for cancer, reported that an abstract related to the company’s second generation of proprietary telomere-targeting THIO prodrugs has been accepted for poster presentation during the upcoming 36th EORTC-NCI-AACR (Free EORTC-NCI-AACR Whitepaper) Symposium on Molecular Targets and Cancer Therapeutics, taking place October 23-25, 2024, in Barcelona, Spain (Press release, MAIA Biotechnology, OCT 15, 2024, View Source [SID1234647218]). The Symposium is hosted by the European Organisation for Research and Treatment of Cancer (EORTC), the National Cancer Institute (NCI) and the American Association for Cancer Research (AACR) (Free AACR Whitepaper).

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MAIA will present the results of preclinical studies for its new THIO-based prodrugs, designated as MAIA-2021-20 and MAIA-2022-12, which are lipid-conjugated compounds derived from THIO. These second-generation compounds belong to a new chemical class of molecules called telomere targeting divalent dinucleotides. These preclinical studies were designed to evaluate the efficacy of the new molecules alone and in combination with or without immune checkpoint-blocking antibodies (anti-PD-L1).

MAIA’s Chief Scientific Officer Sergei Gryaznov, Ph.D. commented, "Our presentation will demonstrate that treatment with each of the prodrugs studied was highly efficacious and was shown to overcome immunotherapy resistance. Our results have shown marked activity in advanced tumors and resulted in tumor growth inhibition in preclinical models of lung cancer, colorectal carcinoma, melanoma and hepatocellular carcinoma. We are actively working to advance these candidates toward clinical development."

Presentation details:

Title:

New Dual-Pharmacophore Dinucleotide Prodrugs as Potent Telomere Targeting Anticancer Molecules

Abstract number:

ENA24-0044

Session title:

New Drugs

Date and time:

Wednesday, October 23, 2024, at noon CEST

Presenting author:

Ilgen Mender, Ph.D., Director of Biology Research, MAIA Biotechnology

Poster access:

MAIA’s poster will be available at maiabiotech.com/publications on October 23, 2024

MAIA has designed and evaluated more than 80 THIO-like compounds to date and has submitted three U.S. patent applications for its second-generation telomere targeting agents.

About THIO

THIO (6-thio-dG or 6-thio-2’-deoxyguanosine) is a first-in-class investigational telomere-targeting agent currently in clinical development to evaluate its activity in Non-Small Cell Lung Cancer (NSCLC). Telomeres, along with the enzyme telomerase, play a fundamental role in the survival of cancer cells and their resistance to current therapies. The modified nucleotide 6-thio-2’-deoxyguanosine (THIO) induces telomerase-dependent telomeric DNA modification, DNA damage responses, and selective cancer cell death. THIO-damaged telomeric fragments accumulate in cytosolic micronuclei and activates both innate (cGAS/STING) and adaptive (T-cell) immune responses. The sequential treatment with THIO followed by PD-(L)1 inhibitors resulted in profound and persistent tumor regression in advanced, in vivo cancer models by induction of cancer type–specific immune memory. THIO is presently developed as a second or later line of treatment for NSCLC for patients that have progressed beyond the standard-of-care regimen of existing checkpoint inhibitors.