title: CEACAM1-S: the virtues of alternative splicing in gut immunity.
abstract: Immunoglobulin A (IgA) is the main intestinal antibody. In this issue of Immunity, Chen et al. (2012) show that intestinal T cells enhance protective IgA responses by expressing a short isoform of the CEACAM1 protein.
authors.affiliation: The Immunology Institute, Department of Medicine, Mount Sinai School of Medicine, New York, NY, USA.
authors.forename: Alejo
authors.initials: A
authors.lastname: Chorny
authors.forename: Andrea
authors.initials: A
authors.lastname: Cerutti