Glutaminyl-peptide cyclotransferase-like protein (QPCTL) is a modulator of CD47-SIRPα binding and can be targeted to achieve antitumor responses through myeloid checkpoint blockade. At the recent ESMO meeting in Madrid, researchers from Insilico Medicine Inc. reported the preclinical characterization of ISM-8207, a QPCTL inhibitor with activity against triple-negative breast cancer (TNBC) and diffuse large B-cell lymphoma (DLBCL).