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首页> 外文期刊>Nature immunology >The endothelial protein PLVAP in lymphatics controls the entry of lymphocytes and antigens into lymph nodes
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The endothelial protein PLVAP in lymphatics controls the entry of lymphocytes and antigens into lymph nodes

机译:淋巴管中的内皮蛋白PLVAP控制着淋巴细胞和抗原进入淋巴结

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In the lymphatic sinuses of draining lymph nodes, soluble lymph-borne antigens enter the reticular conduits in a size-selective manner and lymphocytes transmigrate to the parenchyma. The molecular mechanisms that control these processes are unknown. Here we unexpectedly found that PLVAP, a prototypic endothelial protein of blood vessels, was synthesized in the sinus-lining lymphatic endothelial cells covering the distal conduits. In PLVAP-deficient mice, both small antigens and large antigens entered the conduit system, and the transmigration of lymphocytes through the sinus floor was augmented. Mechanistically, the filtering function of the lymphatic sinus endothelium was dependent on diaphragms formed by PLVAP fibrils in transendothelial channels. Thus, in the lymphatic sinus, PLVAP forms a physical sieve that regulates the parenchymal entry of lymphocytes and soluble antigens.
机译:在引流淋巴结的淋巴窦中,可溶性淋巴传播的抗原以大小选择的方式进入网状导管,并且淋巴细胞迁移到实质。控制这些过程的分子机制尚不清楚。在这里,我们出乎意料地发现,血管的原型内皮蛋白PLVAP是在覆盖远端导管的窦内衬淋巴内皮细胞中合成的。在缺乏PLVAP的小鼠中,小抗原和大抗原均进入导管系统,并且淋巴细胞通过窦底的转运增加。从机理上讲,淋巴窦内皮细胞的过滤功能取决于跨内皮通道中PLVAP原纤维形成的隔膜。因此,在淋巴窦中,PLVAP形成了一个物理筛子,可调节淋巴细胞和可溶性抗原的实质进入。

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