APRIL is a cytokine that belongs to the TNF superfamily and binds to TACI and BCMA. It is implicated in the regulation of tumor cell growth, is involved in monocyte/macrophage-mediated immunological processes and functions as an important survival factor for plasmablasts and bone marrow plasma cells. - ELISA assay. Detects human APRIL in serum, plasma and cell culture supernatant. Colorimetric sandwich assay. Sample Type: Cell Culture Supernatant, Plasma, Serum. Range: 3.9 to 250pg/ml. Sensitivity: 1pg/ml. APRIL is a cytokine that belongs to the TNF superfamily and binds to TACI and BCMA. It is implicated in the regulation of tumor cell growth, is involved in monocyte/macrophage-mediated immunological processes and functions as an important survival factor for plasmablasts and bone marrow plasma cells.