Biophenotypic B/macrophage cells express COX-1 and up-regulate COX-2 expression and prostaglandin E(2) production in response to pro-inflammatory signals. - Graf,B.A.; Nazarenko,D.A.; Borrello,M.A.; Roberts,L.J.; Morrow,J.D.; Palis,J.; Phipps,R.P. (Eur J Immunol, 1999)