Provided are compounds of Formula Y-Z: The compounds target plexin domain containing 2 (PLXDC2). The compounds can be used to treat conditions such as inflammatory or immune-mediated diseases, diabetes, infectious diseases, and cancers. The compounds can be used to treat such specific conditions as systemic lupus erythematosus, rheumatoid arthritis, multiple sclerosis, autoimmune encephalitis, diabetic nephropathy, diabetic retinopathy, psoriasis, and inflammatory bowel disease, among other conditions.