Leknes Ingvar L
Faculty of Engineering and Science, Sogn og Fjordane University College, N-6851, Sogndal, Norway.
Fish Shellfish Immunol. 2007 Oct;23(4):897-900. doi: 10.1016/j.fsi.2007.02.007. Epub 2007 Mar 7.
The localization and frequency of eosinophilic granule cells (EGCs) and endocytic cells in the intestinal wall of a teleost, pearl gouramy (Trichogaster leeri), a stomach-containing anabantid, are described. EGCs occurred in high numbers in lamina propria and epithelial layer throughout the entire intestine. They often embraced blood capillaries, but were unable to take up foreign ferritin, i.e. they seem not to play any blood cleansing role in this tissue. Only some of the EGCs granules reacted with Schmorl's solution, suggesting that they are at a different stage of development or of different types in these cells. The granule content is probably secreted close to the intestine blood stream where it may play important local immunological roles. The present results suggest that the number of intestinal EGCs can be high in teleosts even in species with a putative well-developed acid-based defence in the digestive tract. Also, endocytic cells capable of taking up and storing much foreign ferritin were frequently seen in this tissue; such cells may play significant cleansing and scavenger roles throughout the entire intestine in pearl gouramy.
描述了一种有胃的攀鲈科鱼类珍珠马甲（Trichogaster leeri）肠道壁中嗜酸性粒细胞（EGCs）和内吞细胞的定位及频率。在整个肠道的固有层和上皮层中，EGCs数量众多。它们常常环绕着毛细血管，但无法摄取外源铁蛋白，也就是说，它们似乎在该组织中不发挥任何血液净化作用。只有部分EGCs颗粒与施莫尔氏溶液发生反应，这表明这些细胞处于不同的发育阶段或属于不同类型。颗粒内容物可能在靠近肠道血流的位置分泌，在那里它可能发挥重要的局部免疫作用。目前的结果表明，即使在消化道中假定具有完善的酸碱防御机制的硬骨鱼类中，肠道EGCs的数量也可能很高。此外，在该组织中经常可以看到能够摄取和储存大量外源铁蛋白的内吞细胞；这类细胞可能在珍珠马甲的整个肠道中发挥重要的净化和清除作用。
