Manabe T, Ikeda H
Anat Rec. 1986 Sep;216(1):55-9. doi: 10.1002/ar.1092160110.
The type II pneumocytes of guinea pigs were studied with a transmission electron microscope. It was shown that 5-20% of type II cells contained filamentary tubular inclusions. No reports of similar structures in type II cells of any species have been found in the literature to date. These inclusions measured 90 nm in diameter, varying up to 3 micron in length, and were generally present in the basal and lateral portions of the cells with a close association to the lamellar bodies. They were usually straight but could be curved and tended to aggregate into parallel stacks. In cross-sections, these filamentary tubular inclusions were surrounded by a thickened unit membrane and were composed of microfilaments arranged in circular fashion around a central core. In longitudinal sections, they consisted of rod-like bodies with three lines of filaments. The possible function of the filamentary tubular inclusions is also discussed.
用透射电子显微镜对豚鼠的Ⅱ型肺细胞进行了研究。结果表明，5%至20%的Ⅱ型细胞含有丝状管状内含物。迄今为止，在文献中尚未发现任何物种的Ⅱ型细胞中有类似结构的报道。这些内含物直径为90纳米，长度可达3微米不等，通常存在于细胞的基部和侧面，与板层小体密切相关。它们通常是直的，但也可能是弯曲的，并且倾向于聚集成平行的束状。在横切面上，这些丝状管状内含物被一层增厚的单位膜所包围，由围绕中心核心呈圆形排列的微丝组成。在纵切面上，它们由带有三排细丝的杆状体组成。还讨论了丝状管状内含物的可能功能。
