PMID: 7540864Mar 1, 1995Paper

Lymphocytes infiltrating the CNS during inflammation display a distinctive phenotype and bind to VCAM-1 but not to MAdCAM-1

International Immunology
Britta EngelhardtEugene C Butcher

Abstract

The nature of inflammatory lymphocytes recruited to the CNS has been studied in a model of chronic inflammation. Injection of killed Corynebacterium parvum into the cortex of the mouse brain produces a circumscribed inflammatory cellular infiltrate around the injection site, and recruited mononuclear inflammatory cells (IC) can be isolated for flow cytometric analysis. The majority of IC were T cells. In comparison with the predominant naive population of mesenteric lymph node T cells, IC T cells express much higher levels of CD44, LFA-1 and ICAM-1, and lower levels of CD45RB, features commonly associated with memory (previously activated) cells. In addition, in contrast to the L-selectin+ alpha 6-integrinlow phenotype of naive lymph node T cells, IC T cells lacked L-selectin and were alpha 6-integrin-. Mac-1, recently proposed as another marker of memory T cell differentiation, was not displayed by IC T cells, suggesting that Mac-1 expression may be heterogeneous among memory T cell subsets. A subset of mesenteric lymph node (MLN) T cells, probably representing activated T cells undergoing the naive to memory transition, but not of IC T cells, expressed high levels of alpha 6-, beta 7- and alpha E-integrin. IC and MLN naive T ...Continue Reading

Citations

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