Wallow I H, Burnside B
Invest Ophthalmol Vis Sci. 1980 Dec;19(12):1433-41.
The contractile protein actin was identified within retinal capillary pericytes and endothelial cells. In capillary cross-sections, circumferential pericyte processes showed numerous parallel bundles of actin filaments forming a cap over the adjacent endothelial cells. The latter contained few actin filaments but a considerable number of intermediate filaments. Pericytes and endothelial cells communicated via gaps in the adluminal basal lamina. These special anatomic relationships are interpreted as evidence for a contractile role of retinal capillary pericytes and against a contractile role of retinal capillary endothelial cells
在视网膜毛细血管周细胞和内皮细胞中发现了收缩蛋白肌动蛋白。在毛细血管横切面上，周细胞的环形突起显示出许多平行排列的肌动蛋白丝束，在相邻的内皮细胞上形成一个帽状结构。内皮细胞含有少量肌动蛋白丝，但有相当数量的中间丝。周细胞和内皮细胞通过管腔侧基膜上的间隙进行沟通。这些特殊的解剖学关系被解释为视网膜毛细血管周细胞具有收缩作用的证据，而视网膜毛细血管内皮细胞不具有收缩作用。
