Harpoon Therapeutics Inc. provided updated interim monotherapy data from 71 patients in its phase I/II trial testing HPN-328 in small-cell lung cancer (SCLC) and other neuroendocrine tumor types in a poster at the European Society of Medical Oncology Congress (ESMO). Wall Street immediately began comparing the compound, which takes aim at delta-like ligand 3 (DLL3) with a similar prospect from Amgen Inc. that recently yielded promising results.