Core Insights - TransCode Therapeutics is advancing its Phase 1a clinical trial of TTX-MC138, a first-in-class therapeutic candidate targeting microRNA-10b, which is believed to play a significant role in metastatic cancer progression [1][4][7] - The trial has treated 13 patients with doses ranging from 0.8 mg/kg to 4.8 mg/kg, with no significant safety issues reported [1][8] - Preliminary pharmacokinetic (PK) and pharmacodynamic (PD) data indicate a favorable profile for TTX-MC138, supporting its progression to the Phase 1b trial [2][3] Company Overview - TransCode Therapeutics focuses on RNA therapeutics for treating metastatic diseases, utilizing its proprietary TTX nanoparticle platform [7] - The lead candidate, TTX-MC138, aims to inhibit microRNA-10b, a biomarker associated with metastasis [7] Clinical Trial Details - The Phase 1 clinical trial is designed as a multicenter, open-label, dose-escalation and dose-expansion study to evaluate the safety and tolerability of TTX-MC138 in patients with various metastatic solid cancers [5] - The trial consists of an initial dose-escalation stage followed by a dose-expansion stage, with the primary objective of assessing safety and tolerability [5] Treatment Progress - Eight patients are currently receiving ongoing treatment, with two patients demonstrating stable disease after seven months of treatment [2][8] - The trial has shown a predictable dose-response relationship in PK data, with evidence of target engagement for miR-10b in 5 out of 6 patients analyzed [2][8]

Core Insights - TransCode Therapeutics has initiated treatment for the first patient in Cohort 4 of its Phase I clinical trial for TTX-MC138, a therapeutic candidate targeting microRNA-10b, which is associated with metastatic cancer [1][3] - The trial has shown no significant safety or dose-limiting toxicities among the ten patients treated so far, with seven remaining on study for continued treatment [2][8] - The ongoing analysis of pharmacokinetic and pharmacodynamic data suggests that TTX-MC138 aligns with preclinical results, indicating a promising safety profile [2][4] Company Overview - TransCode Therapeutics is focused on developing RNA therapeutics to treat metastatic diseases, utilizing its proprietary TTX nanoparticle platform [7] - TTX-MC138 is the lead candidate designed to inhibit microRNA-10b, which is believed to drive metastatic disease [4][7] - The company aims to address challenges in RNA delivery to unlock therapeutic access to various genetic targets relevant for cancer treatment [9] Clinical Trial Details - The Phase 1 clinical trial is a multicenter, open-label, dose-escalation and dose-expansion study aimed at evaluating the safety and tolerability of TTX-MC138 in patients with metastatic solid cancers [5] - The trial consists of an initial dose-escalation phase followed by a dose-expansion phase, with the primary objective of assessing safety and tolerability [5] - Cohort 4's treatment is expected to provide insights for dose expansion and initial evidence of clinical activity as the trial progresses [3][5]

Table of Contents As filed with the U.S. Securities and Exchange Commission on February 1, 2023. Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 TRANSCODE THERAPEUTICS, INC. (Exact name of Registrant as specified in its charter) Delaware 2834 81-1065054 (State or other jurisdiction of (Primary Standard Industrial (I.R.S. Employer incorporation or organization) Classification Code Number) Identifica ...