- Novel neurotrophin-1/B cell-stimulating factor-3: a cytokine of the IL-6 family. Senaldi, G., Varnum, B.C., Sarmiento, U., Starnes, C., Lile, J., Scully, S., Guo, J., Elliott, G., McNinch, J., Shaklee, C.L., Freeman, D., Manu, F., Simonet, W.S., Boone, T., Chang, M.S. Proc. Natl. Acad. Sci. U.S.A. (1999)