Aderbasib, also known as INCB007839, is an orally bioavailable low nanomolar hydroxamate-based inhibitor of the ADAM (A Disintegrin And Metalloprotease) family of multifunctional membrane-bound proteins with potential antineoplastic activity. Aderbasib represses the metalloproteinase "sheddase" activities of ADAM10 and ADAM17, which may result in the inhibition of tumor cell proliferation. In preclinical studies, Aderbasib with lapatinib prevented the growth of HER-2/neu–positive BT474-SC1 human breast cancer xenografts in vivo. Aderbasib was being developed by Incyte as a potential adjunctive treatment for metastatic breast cancer. Aderbasib in combination with trastuzumab increased the response rate in HER2 positive metastatic breast cancer patients with advanced disease, relative to historical controls (50% versus 15–35%). INC7839 also improved progression-free survival in a subset of the patients expressing the p95 fragment of HER2. Aderbasib development was halted in 2011 after positive findings from Phase II trials were contradicted by further research. Aderbasib is currently being tested in combination with rituximab for diffuse large B cell non-Hodgkin lymphoma.