Detection of ICOS in Mouse Splenocytes by Flow Cytometry. Mouse splenocytes treated with 1 μg/mL Concanavalin A for 3 days were stained with Rat Anti-Mouse ICOS PE‑conjugated Monoclonal Antibody (Catalog # FAB168P, filled histogram) or isotype control antibody (Catalog # IC013P, open histogram). View our protocol for Staining Membrane-associated Proteins.
Preparation and Storage
The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage
Protect from light. Do not freeze.
12 months from date of receipt, 2 to 8 °C as supplied.
Mouse ICOS (Inducible Co-Stimulator), also known as AILIM (Activiation-Inducible Lymphocyte Immunomediatory Molecule) and CRP-1 (CD28-Related Protein-1), is a member of the CD28 family of immune costimulatory receptors. Other family members are CD28, CTLA-4 and PD-1. Mouse ICOS is a homodimeric type I transmembrane protein consisting of 200 amino acids (aa) with a putative 20 aa signal sequence, a 122 aa extracellular domain, a 23 aa transmembrane region, and a 35 aa cytoplasmic domain. ICOS shares approximately 39% aa similarity with CD28 and CTLA-4. Mouse and human ICOS share approximately 72% aa identity. ICOS is expressed on most CD45RO+ cells. ICOS expression is upregulated within approximately 24-48 hours of activation on Th primed cells. B7-H2, a member of the B7 family of costimulatory ligands, has been identified as the ICOS ligand. The B7-H2/ICOS interaction appears to play roles in T cell dependent B cell activation and Th differentiation.
Coyle, A.J. and J.C. Gutierrez-Ramos (2001) Nat. Immunol. 2:203.
Mages, H.W. et al. (2000) Eur. J. Immunol. 30:1040.
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