Classes of biologics delivered by local biomaterial-based delivery strategies. (A) Antibody-based treatments are used to interfere with signaling of inflammatory cytokines such as IL-6 and TNFα. (B) Chemokines, such as CCL22, CXCL12 and CCL1, can be delivered to generate a chemotactic gradient capable of recruiting regulatory T cells to a specific site of interest. (C) Various cytokines can be delivered to drive differentiation of immature or tolerogenic dendritic cell subtypes (colony-stimulating factors), increase regulatory immune responses (interleukins), induce apoptosis of autoreactive immune cells (TNF family) or generate regulatory T cells (TGFβ1).