Route of lymphocyte migration through the high endothelial venule (HEV) in human palatine tonsil

被引:22
作者
Indrasingh, I [1 ]
Chandi, G [1 ]
Vettivel, S [1 ]
机构
[1] Christian Med Coll & Hosp, Dept Anat, Vellore 632002, Tamil Nadu, India
关键词
high endothelial venule; human; palatine tonsil; lymphocyte; migration;
D O I
10.1016/S0940-9602(02)80040-1
中图分类号
R602 [外科病理学、解剖学]; R32 [人体形态学];
学科分类号
100101 ;
摘要
Eleven palatine tonsils were collected from subjects who underwent tonsillectomy in Christian Medical College Hospital and the route of migration of lymphocytes through the high endothelial vessel was studied under EM. In the interendothelial route, migration of a lymphocyte through HEV wall began with the adhesion of a lymphocyte to the surface of endothelial cells by means of a short cytoplasmic projection in the vicinity of intercellular space. The projection extended into the cleft between adjacent endothelial cells. The lymphocyte migrated through HEV by diapedesis. After the lymphocyte had traversed the interendothelial space, it occupied the subendothelial space. In the transendothelial route, migration of a lymphocyte through HEV was initiated by adherence of the lymphocyte to the endothelial cell. The adherent lymphocyte compressed or invaginated into the cytoplasm of the endothelial cell, entered the endothelial cell, was completely enclosed within the endothelial cell cytoplasm, and emerged from the endothelial cell to occupy the subendothelial space. Evidence is presented from static transmission electron microscopic pictures for the migration of lymphocytes by both interendothelial and transendothelial routes through the high endothelial venule.
引用
收藏
页码:77 / 84
页数:8
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