CD33 CD33 molecule - randycrew

[ArchivalUser]

CD33 is a 67-kDa transmembrane glycoprotein that contains one V-set and one C2-set Ig-like domain6. It is a biomarker and therapeutic target for acute myeloid leukemia (AML). The recruitment of SHP-1 and SHP-2 by CD33 results in inhibition of tyrosine phosphorylation and Ca2+ mobilization. CD33 expression is assumed to be restricted to the myeloid lineage of immune cells. Thus, it is highly expressed on myeloid-committed cells of the bone marrow and circulating monocytes. CD33 expression is down-regulated to low levels on peripheral granulocytes and resident macrophages, and it is constitutive on DC. This expression pattern suggests a role of CD33 on myeloid differentiation and cellular function of monocyte and DC
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