CD40 belongs to the TNF-receptor superfamily and is essential in mediating a broad variety of immune and inflammatory responses including T cell-dependent immunoglobulin class switching, memory B cell development and germinal center formation. The interaction of CD40-CD40L is necessary for amyloid-beta-induced microglial activation, and thus is thought to be an early event in Alzheimer disease pathogenesis. CD40 is constitutively expressed by antigen presenting cells, including dendritic cells, B cells and macrophages. Consistent with its widespread expression on normal cells, CD40 is also expressed on a wide range of tumor cells, including non-Hodgkin's and Hodgkin's lymphomas, myeloma and some carcinomas including nasopharynx, bladder, cervix, kidney and ovary.
Biological Activity:
Blocks the binding of CD40L to CD40.
Sequence:
The Fc portion of human IgG1 is fused to the C-terminus of human CD40 (aa 21-193).
Storage and Stability:
Short-term Storage: +4 degrees C
Long-term Storage: -20 degrees C
Stable for at least 6 months after receipt when stored at -20 degrees C.
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