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CD163 Primary Antibodies

CD163

Human non-hodgkins lymphoma: immunohistochemical staining for CD163 using PA0090. Note intense membrane staining of macrophages amongst lymphocytes. Paraffin section.
Human non-hodgkins lymphoma: immunohistochemical staining for CD163 using PA0090. Note intense membrane staining of macrophages amongst lymphocytes. Paraffin section.

Antigen Background

The CD163 molecule is a type I membrane protein also known as M130 antigen, Ber-Mac3, Ki-M8 or SM4. CD163 protein is restricted in its expression to the monocytic/macrophage lineage. It is reported to be present on all circulating monocytes and most tissue macrophages except those found in the mantle zone and germinal centers of lymphoid follicles, interdigitating reticulum cells and Langerhans cells. In addition, multi-nucleated cells within inflammatory lesions are reported not to express CD163 protein. The protein is upregulated by glucocorticoids and downregulated by the immunosuppressant cyclosporin A and by phorbol esters, while lipopolysaccharide, an inflammatory mediator, has no influence on expression. It has been proposed that a specific release mechanism of soluble CD163 antigen by human monocytes may play an important role in modulating inflammatory processes.


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