TransCode Therapeutics Announces eIND Submission to US FDA for Planned First-in-Human Clinical Trial in Patients with Advanced Solid Tumors

TransCode Therapeutics, Inc. (NASDAQ: RNAZ), the RNA oncology company committed to more effectively treating cancer using RNA therapeutics, announced today that it has submitted an exploratory Investigational New Drug (eIND) application to the U.S. Food and Drug Administration (FDA) for a planned First-in-Human Phase 0 clinical trial.

The planned clinical trial is to evaluate TransCode’s lead therapeutic candidate, TTX-MC138, in cancer patients with advanced solid tumors. ​TTX-MC138 is designed to inhibit the pro-metastatic RNA, microRNA-10b, described as the master regulator of metastasis in a number of advanced solid tumors. TransCode believes that TTX-MC138 could be used as a treatment for many of these cancers.

“We are very excited to take this next step in the development of TTX-MC138 which we hope will bring us closer to introducing this first of its kind treatment for metastatic disease,” said TransCode’s Chief Executive Officer and co-founder, Michael Dudley. “We are hopeful that the study conducted under the eIND will demonstrate successful delivery of our lead therapeutic candidate to metastatic lesions in patients with advanced solid tumors. The delivery of oligonucleotide therapeutics to sites other than the liver has remained a significant challenge for decades. Overcoming this challenge would represent an unprecedented step in unlocking therapeutic access to a variety of well documented genetic targets involved in a range of cancers and beyond.”

The company believes that TTX-MC138 has the potential to produce regression without recurrence in a range of cancers, including breast, pancreatic, ovarian and colon cancer, glioblastomas and others. In multiple preclinical murine models of triple-negative breast cancer (TNBC), treatment with low-dose chemotherapy and TTX-MC138 eliminated pre-existing local metastases in 100% of treated animals representative of stage II/III metastatic cancer. In a more aggressive model representative of stage IV metastatic cancer, treatment with low-dose chemotherapy and TTX-MC138 resulted in elimination of distant metastases in 65% of animals treated. In a murine model of pancreatic adenocarcinoma, TTX-MC138, administered as monotherapy, resulted in complete responses, manifested as regression without recurrence, in 40% of treated animals. In addition to murine models of cancer, TTX-MC138 was successfully delivered and demonstrated preliminary efficacy in a case study of spontaneous feline mammary carcinoma.

TransCode’s Chief Technology Officer and co-founder, Dr. Zdravka Medarova, said, “Demonstrating the feasibility of delivering TTX-MC138 to malignant lesions in humans could unlock the potential of a wide array of RNA-targeted therapeutics, since the TTX platform permits a modular drug design, centered around the same delivery vehicle but with different payloads in terms of the sequence, design, and mechanism of action of the nucleic acid that is being delivered.”

A Phase 0 clinical trial is an exploratory study conducted under an Investigational New Drug application. Exploratory IND studies usually involve very limited human exposure to a therapeutic candidate; their primary purpose is to evaluate the candidate’s safety and mechanism of action. In TransCode’s planned clinical trial, up to 12 patients will be given a single dose of radiolabeled TTX-MC138 followed by noninvasive positron emission tomography-magnetic resonance imaging (PET-MRI). The trial is intended to quantify the amount of radiolabeled TTX-MC138 delivered to metastatic lesions and the pharmacokinetics and biodistribution of the therapeutic candidate in cancer patients. The trial could yield critical data regarding therapeutic dose, timing, and potential safety and could inform later stage clinical trials. This trial is not intended to demonstrate any therapeutic effect.

The eIND application includes data, reports and overview summaries of numerous studies that characterize the pharmacology, pharmacokinetics, and toxicology of the clinical trial version of TTX-MC138 both in vitro and in vivo. Additionally, the application describes the chemistry, manufacturing, and control (CMC) production of the drug substance and drug product to be used in the trial. The main purpose of the eIND application is to provide FDA with extensive nonclinical data supporting an acceptable safety profile of a therapeutic candidate to be administered to humans. The FDA is expected to review this application and determine the acceptability of the data before TransCode can begin dosing patients. As with FDA review of Investigational New Drug (IND) applications submitted for Phase 1 clinical trials, an eIND becomes effective 30 days after receipt by the FDA unless FDA, within the 30-day time period, raises concerns or questions about the content of the eIND or clinical trial design.

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