Clinical Research Directory

Testing the Safety of the Combination of Anti-Cancer Drugs CX-5461 (Pidnarulex) and Trastuzumab Deruxtecan (T-DXd) for Human Epidermal Growth Factor Receptor 2 (HER2)-Positive Solid Tumors and Breast Cancer

This phase I trial tests the safety, side effects, and best dose of pidnarulex in combination with trastuzumab deruxtecan in treating patients with breast cancer and other solid tumors that express varying levels of a protein called HER2 and that has spread from where it first started (primary site) to other places in the body (metastatic), that cannot be removed by surgery (unresectable), or that has spread to nearby tissue or lymph nodes (locally advanced). Pidnarulex is an enzyme inhibitor that causes cell death and prevents tumor cell growth. Trastuzumab deruxtecan is in a class of medications called antibody-drug conjugates. It is composed of a monoclonal antibody, called trastuzumab, linked to a chemotherapy drug, called deruxtecan. Trastuzumab attaches to HER2 positive tumor cells in a targeted way and delivers deruxtecan to kill them. Giving pidnarulex in combination with trastuzumab deruxtecan may be safe, tolerable and/or effective in treating patients with metastatic, unresectable, or locally advanced HER2-expressing breast cancer or other solid tumors.

Ribociclib, Tucatinib, and Trastuzumab for the Treatment of HER2 Positive Breast Cancer

This phase Ib/II trial studies the side effects and best dose of ribociclib, tucatinib, and trastuzumab for the treatment of HER2 positive breast cancer that has spread to other parts of the body (metastatic), and then compares the effect of ribociclib, tucatinib, trastuzumab with or without fulvestrant to docetaxel, carboplatin, trastuzumab, and pertuzumab (standard of care) for the treatment of early stage breast cancer before surgery (neoadjuvant therapy). Ribociclib and tucatinib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Trastuzumab is a form of targeted therapy because it attaches itself to specific molecules (receptors) on the surface of tumor cells, known as HER2 receptors. When trastuzumab attaches to HER2 receptors, the signals that tell the cells to grow are blocked and the tumor cell may be marked for destruction by the body's immune system. Pertuzumab is a monoclonal antibody that may interfere with the ability of tumor cells to grow and spread. Estrogen can cause the growth of breast tumor cells. Fulvestrant blocks the use of estrogen by the tumor cells. Chemotherapy drugs, such as docetaxel and carboplatin, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Giving ribociclib, tucatinib, and trastuzumab with or without fulvestrant before surgery may make the tumor smaller and may reduce the amount of normal tissue that needs to be removed.