A total of four dose groups (0.25 × 10^10 colony forming unit, 1 × 10^10 colony forming unit, 5 × 10^10 colony forming unit, and 12.5 × 10^10 colony forming unit) are pre-designed for this study in patients with advanced malignant solid tumors, with three subjects in each dose group in a 3+3 dose escalation design.
This study is a multicenter, open-label, dose-escalation Phase I clinical trial designed to evaluate the safety, tolerability, pharmacokinetic characteristics and preliminary efficacy of live bacterium MNC-168 as a single oral agent in subjects with advanced malignant solid tumors. To explore the changes of biomarkers and intestinal flora related to curative effect, mechanism of action, safety and/or pathological mechanism.