Cluster of Differentiation 4 (CD4) is a membrane glycoprotein expressed in T helper cells, monocytes, macrophages, granulocytes, and dendritic cells, and is a receptor of human immunodeficiency virus (HIV). CD4 staining is used for identifying lymphoproliferative disorders. Since the majority of peripheral T-cell lymphomas arise from the T helper cell subset, CD4 expression can be found in most forms of T-cell lymphomas as well as anaplastic large T-cell lymphomas and mycosis fungoides. Since CD4 may be aberrantly expressed in neoplastic T-lymphocytes, a panel of markers may be used to identify such tumours. CD4(+) CD25(+) T-cells are reported to exert immunosuppression, which is commonly observed in various types of cancers, including non-small cell lung cancer and cancers of the breast, prostate, and ovary.
Host
Rabbit
Isotype
IgG
Species
Human
Clone No
IHC535
Buffer
Tris Buffer pH7.6 with BSA, and sodium azide as preservative