3T3-CD40L is a mouse fibroblast cell line that secretes mouse CD40L. 3T3-CD40L cells can be co-cultured with B cells to aid B cell expansion [1]. Reference : [1] J. Huang, N. A. Doria-Rose, N. S. Longo, L. Laub, C.-L. Lin, E. Turk, B. H. Kang, S. A. Migueles, R. T. Bailer, J. R. Mascola, M. Connors, Isolation of Human Monoclonal Antibodies from Peripheral Blood B Cells. Nat. Protoc. 8, 1907-1915 (2013).
