MAIA Biotechnology Announces Strong Efficacy of THIO as Third-Line Treatment for Non-Small Cell Lung Cancer Patients
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Insights
The reported 38% overall response rate (ORR) for the combination of THIO and cemiplimab in third-line treatment of non-small cell lung cancer (NSCLC) represents a significant advancement in the therapeutic landscape for this patient group. Typically, NSCLC patients without targetable mutations who have progressed on checkpoint inhibitors and chemotherapy have limited treatment options, with historical response rates hovering around 6%. The substantial increase in ORR suggests that this new combination therapy could offer a meaningful clinical benefit. Furthermore, the focus on a first-in-class telomere-targeting agent indicates a novel mechanism of action that could potentially address the mechanisms of resistance encountered with current therapies.
From a research perspective, the early completion of enrollment in the THIO-101 trial underscores the medical community's interest in innovative treatments for NSCLC. The trial's design, which includes patients who have already failed standard treatments, targets a significant unmet need in oncology. The promising efficacy data, paired with a safety profile consistent with previous reports, positions THIO as a potential new standard of care, pending further validation in larger clinical trials. Additionally, the use of a telomere-targeting agent could open new avenues for research into cancer treatment resistance and personalized medicine.
For investors, MAIA Biotechnology's announcement could signal a positive shift in the company's valuation, given the high unmet medical need and the size of the NSCLC market. The impressive ORR, if sustained in larger trials, may lead to accelerated approval pathways and a strong competitive position in the oncology market. However, investors should consider the regulatory risks and the fact that the data is from a small sample size, which may not necessarily predict larger-scale trial outcomes. The potential for THIO to redefine the standard of care for NSCLC could lead to significant market share capture, but this is contingent on continued positive results and eventual regulatory approval.
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Combination THIO 180mg + cemiplimab achieved
38% overall response rate (ORR) in difficult-to-treat, third-line non-small cell lung cancer (NSCLC) -
ORR of
38% significantly exceeds standard of care ORR in NSCLC third-line in patients without a targetable mutation who progressed on checkpoint inhibitors and chemotherapy
As of January 8, 2024, overall response rate (ORR), characterized as partial or complete response to therapy, was
“As an impressive measure of efficacy, the strong response rate of
The efficacy evaluable population defined in the THIO-101 protocol considers all subjects who received at least one dose of THIO treatment and have at least one postbaseline tumor assessment (scans). Two third-line patients in the 180mg dose cohort did not have recorded scans at the data cutoff. Safety remained consistent with previous reports.
The Company recently announced early completion of enrollment in the THIO-101 trial. THIO-101 is expected to be the first completed clinical study of a telomere-targeting agent in the field of cancer drug discovery and treatment.
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.
About THIO-101, a Phase 2 Clinical Trial
THIO-101 is a multicenter, open-label, dose finding Phase 2 clinical trial. It is the first trial designed to evaluate THIO’s anti-tumor activity when followed by PD-(L)1 inhibition. The trial is testing the hypothesis that low doses of THIO administered prior to cemiplimab (Libtayo®) will enhance and prolong immune response in patients with advanced NSCLC who previously did not respond or developed resistance and progressed after first-line treatment regimen containing another checkpoint inhibitor. The trial design has two primary objectives: (1) to evaluate the safety and tolerability of THIO administered as an anticancer compound and a priming immune activator (2) to assess the clinical efficacy of THIO using Overall Response Rate (ORR) as the primary clinical endpoint. Treatment with cemiplimab (Libtayo®) followed by THIO has been generally well-tolerated to date in a heavily pre-treated population. For more information on this Phase II trial, please visit ClinicalTrials.gov using the identifier NCT05208944.
About MAIA Biotechnology, Inc.
MAIA is a targeted therapy, immuno-oncology company focused on the development and commercialization of potential first-in-class drugs with novel mechanisms of action that are intended to meaningfully improve and extend the lives of people with cancer. Our lead program is THIO, a potential first-in-class cancer telomere targeting agent in clinical development for the treatment of NSCLC patients with telomerase-positive cancer cells. For more information, please visit www.maiabiotech.com.
Forward Looking Statements
MAIA cautions that all statements, other than statements of historical facts contained in this press release, are forward-looking statements. Forward-looking statements are subject to known and unknown risks, uncertainties, and other factors that may cause our or our industry’s actual results, levels or activity, performance or achievements to be materially different from those anticipated by such statements. The use of words such as “may,” “might,” “will,” “should,” “could,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “project,” “intend,” “future,” “potential,” or “continue,” and other similar expressions are intended to identify forward looking statements. However, the absence of these words does not mean that statements are not forward-looking. For example, all statements we make regarding (i) the initiation, timing, cost, progress and results of our preclinical and clinical studies and our research and development programs, (ii) our ability to advance product candidates into, and successfully complete, clinical studies, (iii) the timing or likelihood of regulatory filings and approvals, (iv) our ability to develop, manufacture and commercialize our product candidates and to improve the manufacturing process, (v) the rate and degree of market acceptance of our product candidates, (vi) the size and growth potential of the markets for our product candidates and our ability to serve those markets, and (vii) our expectations regarding our ability to obtain and maintain intellectual property protection for our product candidates, are forward looking. All forward-looking statements are based on current estimates, assumptions and expectations by our management that, although we believe to be reasonable, are inherently uncertain. Any forward-looking statement expressing an expectation or belief as to future events is expressed in good faith and believed to be reasonable at the time such forward-looking statement is made. However, these statements are not guarantees of future events and are subject to risks and uncertainties and other factors beyond our control that may cause actual results to differ materially from those expressed in any forward-looking statement. Any forward-looking statement speaks only as of the date on which it was made. We undertake no obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events or otherwise, except as required by law. In this release, unless the context requires otherwise, “MAIA,” “Company,” “we,” “our,” and “us” refers to MAIA Biotechnology, Inc. and its subsidiaries.
1 Journal of Thoracic Oncology, Volume 4, Number 12, December 2009. *Note: no updated 3rd line NSCLC data in recent years.
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Investor Relations Contact
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Source: MAIA Biotechnology, Inc.
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