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TransCode Therapeutics Successfully Completes Phase 1a Clinical Trial, Reports Safety and Stabilization Data for TTX-MC138 in Metastatic Cancer

Key Takeaway: TransCode Therapeutics has successfully completed its Phase 1a clinical trial for TTX-MC138, demonstrating safety and durable disease stabilization in metastatic cancer patients. The trial met its primary endpoint with no dose-limiting toxicities. Following these promising results, the company plans to advance TTX-MC138 into Phase 2a development, focusing on ctDNA-positive colorectal cancer.
Price reaction · baseline $5.285 (2026-06-02 close) · hit after-hours · 1 other RNAZ headline(s) in the window, move may be shared
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Market Sentiment Analysis

POSITIVE FACTORS

  • No dose-limiting toxicities reported.
  • Durable disease stabilization observed in patients.
  • Advancement to Phase 2 development confirmed.

BiopharmaWatch Analysis

From our catalyst data and publicly available data · not financial advice
Cash runway
~5 mo
High dilution risk
Lead asset
TTX-MC138
Phase 1 · Advanced Solid Tumor

Full Press Release Details

TransCode reports no dose-limiting toxicities, durable disease stabilization in metastatic patients; advances to Phase 2 development in ctDNA-positive cancers using next-generation RNA therapeutics.
BOSTON,June 3, 2026/PRNewswire/ -- TransCode Therapeutics, Inc. (NASDAQ:RNAZ) a clinical stage company pioneering immuno-oncology and RNA for the treatment of high risk and advanced cancer, today announced further results of the Phase 1a dose escalation clinical trial. The trial met its primary endpoint of safety, with positive tolerability, combined with disease stabilization in multiple patients, and the absence of dose-limiting toxicities with its lead therapeutic candidate TTX-MC138. TTX-MC138, an investigational inhibitor of the key metastatic driver, microRNA-10b, has shown durable disease control. These findings support advancing TTX-MC138 into Phase 2a clinical development to assess efficacy in patients with circulating tumor DNA (ctDNA) positive colorectal cancer following curative–intent therapy.

Frequently Asked Questions

What were the results of the Phase 1a trial for TTX-MC138?

The Phase 1a trial showed no dose-limiting toxicities and durable disease stabilization.

What is TTX-MC138 targeting?

TTX-MC138 targets microRNA-10b, a key driver of metastasis in cancer.

What is the next step for TTX-MC138?

TTX-MC138 will advance to Phase 2a clinical development for ctDNA-positive cancers.

What type of cancer is TTX-MC138 being developed for?

TTX-MC138 is being developed for metastatic cancer, specifically colorectal cancer.

Last updated: Jun 3, 2026