Vascular cell adhesion molecule-1 mRNA is expressed in immune-mediated and ischemic injury of the rat nervous system
- PMID: 8862137
- DOI: 10.1016/s0165-5728(96)00109-9
Vascular cell adhesion molecule-1 mRNA is expressed in immune-mediated and ischemic injury of the rat nervous system
Abstract
In this study we used nonradioactive in situ hybridization for the cellular localization of vascular cell adhesion molecule-1 (VCAM-1) mRNA in immune-mediated, ischemic and degenerative diseases of the rat nervous system. In the acute phase of experimental autoimmune encephalomyelitis and neuritis VCAM-1 mRNA was expressed not only on the luminal surface of inflamed vessels but also in perivascular cells suggesting a functional role of VCAM-1 in both endothelial adhesion and local restimulation of autoantigen-specific T cells. Accordingly, perivascular T cell accumulation was most pronounced at sites of local VCAM-1 mRNA expression. In addition, VCAM-1 mRNA was detected in the border zone around photochemically induced cerebral infarcts which is the predeliction site of T cell infiltration and expression of immune activation markers during the first week after ischemia. VCAM-1 mRNA was absent from the center of the infarcts as well as axotomized central and peripheral nerves undergoing Wallerian degeneration. These data indicate that VCAM-1-mediated adhesion processes are involved in immune-mediated and ischemic diseases of the nervous system but not in T cell-independent macrophage recruitment during Wallerian degeneration.
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