TransCode Therapeutics (RNAZ) announced that the Safety Review Committee, or SRC, monitoring its Phase 1 clinical trial has unanimously approved opening of the third cohort of patients based on its favorable review of Cohort 2 safety data. The therapeutic candidate being evaluated, TTX-MC138, is TransCode’s lead candidate designed to inhibit microRNA-10b, or miR-10b, a microRNA critical to the emergence and progression of many metastatic cancers. The dose administered to the third cohort will be approximately double the dose administered to the second cohort. Several patients in the first and second cohort remain on study for continued treatment. No significant safety or dose limiting toxicities have been reported. Analysis of Cohort 1 data for pharmacokinetic, or PK, and pharmacodynamic, or PD, activity is ongoing and to date suggests that TTX-MC138 demonstrates a PK/PD profile consistent with preclinical results and results from the previous Phase 0 clinical trial. Specifically, results from Cohort 1 confirmed the Phase 0 observation that TTX-MC138 shows evidence of pharmacodynamic activity in the presence of high baseline expression of miR-10b, reaching a 66% inhibition at 24 hours after infusion. Additionally, the concentration of TTX-MC138 in blood plasma as a function of dose in humans was found to be higher than achieved in nonclinical studies, suggesting a favorable pharmacokinetic profile.
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