Additionally, ALG.APV-527 enhanced primary immune cell-mediated killing of 5T4-expressing tumor cells...ALG. APV-527 is designed to elicit safe and efficacious 4-1BB-mediated antitumor activity in a range of 5T4-expressing tumor indications....ALG.APV-527 is a promising anti-cancer therapeutic for the treatment of a variety of 5T4-expressing solid tumors.