【摘要】 本文采用醛诱发荧光的荧光组织化学方法,首先定位小强荧光细胞,在电子显微镜下观察它们的超微结构。心脏的小强荧光细胞体积小,胞质含大量两种不同电子密度的颗粒泡。它们的线粒体丰富,每个沿核水平切面有20个线粒体;高尔基复合体发达,每组为4～7个扁囊构成;粗面内质网一般呈单独扁囊,散布在胞质。小强荧光细胞与胆碱能神经末梢形成传入性突触,相邻小强荧光细胞常形成粘合斑结构和相嵌联结。它们相邻的毛细血管,多为有孔型毛细细管。它们在相邻细胞之间、邻近血管和细胞间隙部位有胞吐现象。结果提示,这种细胞可能以内分泌或旁分泌方式,起局部调节作用。更多还原

【Abstract】 By means of the fluorescent histochemistry the small intense fluorescent (SIF) cells of the rat heart were identified under the fluorescent microscope, then the tissue containing these cells were prapared for electron microscopy. Ultrastracturally SIF cells were small in size and contained a lot of granules which can be distinguished into two types of electric density, and abundant number of mitocondria which appeared about 20 in each section of SIF cell at the nuclear level, and a large Golgi complex which consisted of 4-7 cisternae arranging in paralled array and some vesicles. Many single cisternae of rough endoplasmic reticulum were distributed in their cytoplasm. Adhesion zones and interdigitated processes were often observed between two SIF cells. Cholinergic nerves formed afferent synapses with SIF cells. SIF cells often occured near fenetrated capillaries. We found that the core of the granulated vesicles of some SIF cells were released into the perivascular space. These results indicated that SIF cells of the rat heart may have a local regulatory fnuction either as endocrinal or paracrinal cells.更多还原