Abstract
Lacrimal glands (LG) possess both transient and stationary lymphocyte populations, distinct from those in peripheral lymphoid sites, which regulate and effect humoral and cell-mediated immune responses contributing to the protection of ocular surfaces.1,2 Further, lacrimal glands are sites of lymphocytic infiltration in inflammatory disorders such as Sjögren’s syndrome. Earlier work has established that rat lacrimal gland lymphocytes display a distinct phenotypic profile compared to nonmucosal lymphoid tissues.3,4 Of particular interest is the presence of lymphocytes expressing Thy-1, which, in the rat, is found on immature B and T lymphocytes in bone marrow and thymus5,6 as well as on their recently released progeny in the periphery. The Thy-1 molecule is lost with increasing maturity.7,8 In the case of T cells, developmental stages, including immature recent thymic emigrants (RTE), mature common peripheral T cells (CPT), and activated T cells that have recently encountered antigen, can be identified on the basis of size and expression of Thy-1 and CD45RC.7,8
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O’Sullivan, N.L., Skandera, C.A., Montgomery, P.C. (1998). Rat Lacrimal Glands Contain Activated and Resting Mature T Cells, Recent Thymic Emigrants, and Possibly Extrathymic Populations. In: Sullivan, D.A., Dartt, D.A., Meneray, M.A. (eds) Lacrimal Gland, Tear Film, and Dry Eye Syndromes 2. Advances in Experimental Medicine and Biology, vol 438. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-5359-5_83
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DOI: https://doi.org/10.1007/978-1-4615-5359-5_83
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