A Study of TAK-188 in Adults With Advanced or Spreading Solid Tumors

TAK-188 is a new medicine that targets a protein called CCR8, which is found on the surface of certain cells (Tregs) inside tumors. These cells can weaken the body's ability to fight cancer. TAK-188 may help to remove these Tregs. Removing these Tregs may allow more cancer-fighting cells (CD8+ T cells) to attack the tumor and potentially stop tumors from growing. In this study, researchers want to learn if TAK-188 can help the body's immune system better fight cancer in adults with advanced cancers which have not gotten better with regular treatments. The main aims of this study are to check if TAK-188 is safe in adults with advanced or spreading (metastatic) solid tumors, if participants tolerate the treatment with TAK-188 and to learn if TAK-188 works well in adults with certain advanced cancers after their previous treatments didn't work. Participants may receive TAK-188 for up to 1 year. Their health will be monitored after the treatment has ended for up to another year.