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  • Title: The migration of lymphocytes and polymorphonuclear leukocytes across the endothelial wall of the absorbing peripheral lymphatic vessel.
    Author: Azzali G, Orlandini G, Gatti R.
    Journal: J Submicrosc Cytol Pathol; 1990 Oct; 22(4):543-9. PubMed ID: 2282640.
    Abstract:
    We studied the process of transendothelial migration of lymphocytes and polymorphonuclear leukocytes in the absorbing peripheral lymphatic vessels of small intestine and urinary bladder, under normal conditions, lymphatic stasis and prolonged fast. By ultrathin serial sections and three-dimensional models we found that lymphocytes and leukocytes share a common migration pathway from the interstitium into the lumen of the lymphatic vessel, namely 'the intraendothelial channel'. The migratory process of these cells occurs in several steps: approach to the endothelial wall, entry and run along the channel and finally coming out into lymphatic lumen. Our findings are compared with those concerning lymphatics in pathological conditions and blood vessels. Further considerations concern the possible mechanisms underlying this kind of transendothelial migration.
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