This invention relates to an immunoconjugate comprising interleukin-4 (IL4) and two antibody molecules which bind an extra-cellular matrix component associated with neoplastic growth, angiogenesis, and/or tissue remodelling, such as the A1 domain of tenascin C or the ED-A or ED-B isoforms of fibronectin. The antibody molecules may be positioned at the N and C terminals of the IL4. The immunoconjugate may be useful in the treatment of cancer, inflammatory autoimmune disease and other disease characterised by expression of an extra-cellular matrix component associated with neoplastic growth, angiogenesis, and/or tissue remodelling.
