On February 27, 2025 MAIA Biotechnology, Inc., (NYSE American: MAIA) ("MAIA", the "Company"), a clinical-stage biopharmaceutical company developing targeted immunotherapies for cancer, reported plans to initiate a Phase 3 pivotal trial in 2025, named THIO-104, to evaluate the efficacy of THIO administered in sequence with a checkpoint inhibitor (CPI) in third-line non-small cell lung cancer (NSCLC) patients who are resistant to checkpoint inhibitors and chemotherapy (Press release, MAIA Biotechnology, FEB 27, 2025, View Source [SID1234650730]). The multicenter, open-label, pivotal Phase 3 trial is designed to provide a direct comparison to chemotherapy in a 1:1 randomization of up to 300 patients.
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"THIO has consistently and substantially outperformed standard treatment options in our THIO-101 Phase 2 trial to date. THIO-104 will give us direct comparative data from a randomized study in patients in third line of treatment," said Vlad Vitoc, M.D., CEO of MAIA. "We expect that the results from this study will further illuminate THIO’s unmatched benefits for advanced stage NSCLC patients.
"Our initiation of THIO-104 will mark an important milestone along our goal for THIO’s FDA commercial approval," Dr. Vitoc added.
MAIA expects to begin enrolling patients in THIO-104 in the second half of 2025 in select countries in Asia, Europe and in the U.S.
The primary endpoint of the clinical trial is overall survival for THIO sequenced with a CPI compared to investigator’s choice of chemotherapy in a third line setting. The secondary endpoints include disease control rate, overall response rate, duration of response, progression-free survival and safety.
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 third line of treatment for NSCLC for patients that are resistant to checkpoint inhibitors and chemotherapy.