First-in-Human Study of TAK-280 in Participants With Solid Tumors

This study consists of 2 phases: Dose-escalation and cohort-expansion phase. Dose-escalation phase: The purpose of the dose-escalation phase is to generate data to characterize the initial safety and tolerability profile of TAK-280 and determine the 2 recommended doses for expansion (RDEs) of TAK-280 to be administered during the cohort-expansion phase. Cohort-Expansion Phase: The cohort expansion phase will be conducted in 3 indications. Only in 1 selected indication participants will be randomized 1:1 to receive either TAK-280 high dose or low dose. In the remaining 2 indications to be studied in the cohort-expansion phase, participants will receive only one dose level of TAK-280.