John, There are several sources of antibody specific for Factor VIII but the data regarding cross-reactivity of these antibodies with other species is sometimes contradictory. DAKO sells a polyclonal rabbit anti-human Factor VIII-related antigen and they state that it demonstrates cross-reactivity with pig. I have used this antibody in an immunoperoxidase stain of porcine endothelial cells and it did not work. I'm not sure if this is because the antibody is not cross-reactive or if factor VIII is not expressed on the cultured cells. The literature suggests either case may be true. The only other source of anti-human Factor VIII that is cross-reactive with pig is Biomeda (Foster, CA). I do not have any personal experience with this antibody but I did find a reference to its use in demonstrating Factor VIII on cultured pig endothelial cells (Cardiovasc. Res. 1995. Dec; 30(6): 841-7). I do not know of any moab's that are cross-reactive. Hope this helps. Robert Schmitt LLUMC Immunology Center ______________________________ Reply Separator _________________________________ Subject: Pig moab's Author: jcknapp@bellsouth.net at InterNetMailMC Date: 3/29/97 2:06 PM Flowers-Help! An investigator at my center is trying to find antibodies for flow to pig Factor VIII and CD56(N-CAM). We looked through all of our catalogs as well as the linscott's directory and came up blank. Does anybody out there know of a source or of moab's to other species for these two antigens that are cross-reactive to pig? Thanks in Advance. John Knapp Diabetes Research Institute University of Miami Miami, Florida, USA
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