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- W2022843764 abstract "Atherosclerotic lesions develop in the arterial intima. Among the leukocytes that accumulate in advanced atherosclerotic plaques, CD8 T cells play a quantitatively important role. They may be involved in disease progression and plaque destabilization, leading to plaque rupture or erosion. These events finally precipitate cardiovascular events. Therefore, we wished to determine the accessibility of the human arterial wall, particularly the arterial intima, for CD8-positive, cytotoxic T lymphocytes. We quantified the number of CD8-positive T cells in the arterial wall using human arterial tissue microarrays. The conditions for efficient cytotoxic T-lymphocyte migration into the arterial wall were determined in an in vitro tissue invasion assay. The invasion pattern of resting or activated cytotoxic T-lymphocyte clones was morphometrically analyzed by confocal microscopy. CD8 T cells represented up to 50% of the lymphocytes in advanced atherosclerotic lesions. Resting CD8-positive cytotoxic T lymphocytes were able to migrate into the arterial intima when it was affected by advanced lesions but not at the earliest stages of the disease. After T-cell receptor and/or proinflammatory cytokine activation, cytotoxic T lymphocytes migrated efficiently into the arterial intima, even in the healthy or mildly affected sites. This in vitro tissue invasion assay mimics conditions under which effector cytotoxic T lymphocytes migrate into the arterial wall to reach similar cell densities as observed in arterial tissue sections from autopsies. Interference with T-cell activation may be important to inhibit cytotoxic T-lymphocyte invasion into the unaffected, healthy artery but may not prevent cytotoxic T-lymphocyte invasion into arteries that are severely affected by atherosclerotic lesions." @default.
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- W2022843764 date "2008-12-01" @default.
- W2022843764 modified "2023-10-16" @default.
- W2022843764 title "Requirements for CD8 T-cell migration into the human arterial wall" @default.
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- W2022843764 doi "https://doi.org/10.1016/j.humpath.2008.04.018" @default.
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