Cellis is a company that develops therapeutic and diagnostic solutions with a focus on nanotechnology, oncology, and molecular biology. It exploits immune cells (mainly macrophages) loaded with a drug (MDC, macrophage-drug conjugate) as smart therapy targeting solid tumors. Using this technology, the company may deliver various anticancer compounds, such as radioisotopes, labels, drugs, and small molecules, and either treat or diagnose tumors.