title: Functional profile of S100A4-deficient T cells.
abstract: The protein S100A4 is best known for its significant role in promoting motility and invasive capacity of cancer cells. Since S100A4 expression has been reported also in T cells, we analyzed its potential role in T cell motility and inflammation. Using S100a4(+/Gfp) mice, we show here that S100A4 is exclusively expressed by memory T cells of CD4(+) or CD8(+) subpopulations, predominantly of the effector memory T cell subtype. However, the protein was not required for in vitro memory T cell migration toward gradients of the inflammatory chemokine CXCL10. Moreover, T cell memory response was normal in S100A4-deficient mice and lack of S100a4 gene expression did not induce any defect in promoting the development of protective immunity or inflammatory reactions leading to autoimmunity. Taken together, our results demonstrate that S100A4 activity is dispensable for T cell motility/migration and inflammatory potential.
authors.affiliation: Institute for Medical Immunology Université Libre de Bruxelles (ULB) Gosselies Belgium.
authors.forename: Kathleen
authors.initials: K
authors.lastname: Weatherly
authors.affiliation: Institute for Medical Immunology Université Libre de Bruxelles (ULB) Gosselies Belgium.
authors.forename: Marie
authors.initials: M
authors.lastname: Bettonville
authors.affiliation: Institute for Medical Immunology Université Libre de Bruxelles (ULB) Gosselies Belgium.
authors.forename: David
authors.initials: D
authors.lastname: Torres
authors.affiliation: Institute for Medical Immunology Université Libre de Bruxelles (ULB) Gosselies Belgium.
authors.forename: Arnaud
authors.initials: A
authors.lastname: Kohler
authors.affiliation: Institute for Medical Immunology Université Libre de Bruxelles (ULB) Gosselies Belgium.
authors.forename: Stanislas
authors.initials: S
authors.lastname: Goriely
authors.affiliation: Institute for Medical Immunology Université Libre de Bruxelles (ULB) Gosselies Belgium.
authors.forename: Michel Y
authors.initials: MY
authors.lastname: Braun
keywords: Ca‐binding protein; T cell; inflammation; motility