大鼠胃壁内毛细淋巴管的超微结构  

ULTRASTRUCTURE OF THE INTRAMURAL LYMPH CAPILLARIES OF THE STOMACH IN THE RAT

作　　者：韩铭达 王云祥[2] 赵玲辉[2] 隋广智[1] 

机构地区：[1]齐齐哈尔医学院解剖学教研室 [2]哈尔滨医科大学解剖学教研室,哈尔滨150086

出　　处：《解剖学报》1992年第2期129-133,共5页Acta Anatomica Sinica

基　　金：国家自然科学基金

摘　　要：本文应用电镜方法研究大鼠胃壁内毛细淋巴管的超微结构特点,并做了图像定量分析。结果发现,胃壁内毛细淋巴管的超微结构与其他器官的相似,具有一般毛细淋巴管的超微结构特点。胃毛细淋巴管内皮细胞间的连接方式有3种,即端端连接(1.8％),重叠连接(73.2％)和插入连接(25.0％)。其中伴有粘着装置的占14.3％,开放连接占3.5％。胃毛细淋巴管内皮细胞内也有质膜小泡,但与心、肝、肾及甲状腺毛细淋巴管内皮细胞的小泡相比,其平均直径较小,向管腔内、外开放和贴附于管腔内、外的较少,其体密度和数密度较低,而在胞质中游离的较多。本文认为,在组织液和大分子物质转运途径中,大鼠胃壁内毛细淋巴管内皮细胞可能以内皮细胞间连接所形成的通道为主,但其小泡系统也起一定作用。The intramural lymph capillaries of the stomach in the rat were studied by electron microscopy in order to obtain information regarding to their ultrastracture and the possible mechanisms of lymph formation. These analyses were performed with aid of the medical image analysis system. Ultrastructurally, the lymph capillaries of the stomach were similar to those described in other organs. The endothelial lining was thin, non-fenestrated and no pericytes, and lacked a continuous basal lamina. The cytoplasmic organelles including mitochondria, rough endoplasmic reticulum, lysosomes and vesicles were observed. 56 intercellular junctions were examined. Three morphological types of them were seen, i. e. end to end, overlapping and interdigitating types. Of these, 1.8% were of the end to end type, 73.2% were the overlapping type (7.3% with junctional complexes) and 25% were interdigitating type. Open junctions (>30nm) accounted for 3.5% of these contacts. The mean maximum diameter of the vesicles was 49.4 nm, the volume density was 0.023 and profile density was 36. The distribution of the vesicles was as following: 29.1% opened onto or touched the abluminal membrane, 44,9% without visible connection to either surfaces, 26% opened onto or touched the luminal membrane. It was concluded that the mechanism of lymph formation in the stomach seems to be different from that of those organs such as heart, liver, kidney and thyroid. The present study suggested that the intercellular pathway may act as the primary route for lymph formation and macromolecule transportation, and the intracytoplasmic vesicular system may also play certain role in the transport of macromolecules.

关 键 词：胃毛细淋巴管 超微结构 大鼠 

分 类 号：R329.444[医药卫生—人体解剖和组织胚胎学]