The antigen is MRP8, the epitope is suspected in the central portion of the peptide. Antigen distribution: Isolated cells: The antigen is found in granulocytes and monocytes but not in other blood cells. In cultured monocytes, maximum MRP8 is expressed after 3 - 4 days. Myeloid leukaemia stain positive. Tissue sections: MRP8 is found in a distinct subpopulation of inflammatory perivascular infiltrates of the myelo-monocytic lineage. Macrophages synthesise MRP8 increasingly during the late stages of inflammation. A low MRP8 (and high MRP- 14) expression by macrophages was also reported in granulomatous diseases such as tuberculosis and sarcoidis. In non-granulomatous chronic inflammatory diseases such as chronic rheumatoid arthritis or chronic rejection after allograft transplantation, MRP8 and MRP14 positive cells consist of different subpopulations. Specificity: Human: MRP8 in stimulated monocytes and macrophages in late phase or chronic inflammation. Other: The antibody reacts with bovine spleen but does not react with rat tissues. It shows a diffuse reaction with swine spleen.
Synonyms: S100A8, 60B8AG, CFAG, CAGA, Calgranulin A, Calgranulin-A, Calprotectin L1L subunit, Cystic fibrosis antigen, CGLA, L1Ag, NIF, p8, Protein S100-A8, MRP8, Urinary stone protein band A, CP-10, MA387, MRP-8