Study of MHB088C in Participants With Advanced or Metastatic Solid Tumors

This study is the first-in-human (FIH) trial of MHB088C, which contains two parts: dose escalation (part one) and dose expansion (part two). Part one: Dose Escalation Study of MHB088C Monotherapy in Participants with Advanced or Metastatic Malignant Solid Tumors The dose escalation part is an open-label, multi-center study in which the eligible participants with advanced or metastatic solid tumors will be enrolled to receive MHB088C monotherapy to assess the safety and tolerability of MHB088C in participants with advanced or metastatic solid tumors, to determine the maximum tolerated dose (MTD) of MHB088C, and to assess its pharmacokinetic profile and preliminary efficacy. The dose expansion part is an open-label, multi-center, multi-cohort expansion study in which participants with advanced or metastatic solid tumors of some predefined cancer types will be enrolled to receive MHB088C monotherapy. Participants with same types of solid tumors will be randomised into different selected dose groups and will be treated with the corresponding dose. This study is designed to assess the preliminary efficacy and safety of MHB088C monotherapy in participants with some types of advanced or metastatic solid tumors, so as to determine the recommended phase 2 dose (RP2D); and to assess the immunogenicity and pharmacokinetic profiles of MHB088C.