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Signaling through the T cell antigen receptor is essential for the formation of regulatory T (Treg) cells in the thymus and for their involvement in antigen-directed suppression of immune responses. Using a conditional null allele of the gene encoding p56Lck we show here that T cell antigen recepto...
ORGANISM(S): Mus musculus 
Mutations in both RAS and the PTEN/PIK3CA/AKT signaling module are found in the same human tumors. PIK3CA and AKT are downstream effectors of RAS, and the selective advantage conferred by mutation of two genes in the same pathway is unclear. Based on a comparative molecular analysis, we show that ac...
ORGANISM(S): Homo sapiens 
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