NCIt definition : Human ICOS wild-type allele is located in the vicinity of 2q33 and is approximately
25 kb in length. This allele, which encodes inducible T-cell costimulator protein,
plays a role in the modulation of T-cell mediated immunity. Mutation of the gene is
associated with common variable immunodeficiency type 1.;
NCIt note : Expression of the ICOS gene may enhance Th17 cell anti-tumor activity. (Sci Transl
Med 2010; 2: in press.);