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Morphological characteristics and proliferation of keratocytes cultured under simulated microgravity.

机译:模拟微重力下培养的角膜细胞的形态特征和增殖。

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This study probed the changes of keratocytes cultured under simulated microgravity. Keratocytes were isolated from rabbit corneas using collagenase digestion method. Cells were seeded in a 55-mL capacity high-aspect-ratio vessel (HARV) of rotary cell culture system (RCCS) at a density of 1 x 10(4) cells/mL. Dehydrated bovine acellular corneal stroma (5 x 5 x 1 mm, n = 30) was used as a carrier for keratocyte culture. Rotational speed was set at 15, 20, and 30 rpm in the first, second, and third week of culture, respectively. Histological evaluation showed that keratocytes in simulated microgravity culture grew into carriers, but those under conventional gravity grew on the surface of carriers. Scanning electron microscopic evaluation showed that after 19 days in culture, keratocytes on the carriers were spherical and spread in the spaces among the collagen fibers. Cells were dendritic or spindle shaped, and they developed many foot processes linked with surrounding cells. The absorbance values of the simulated microgravity group were significantly higher (P < 0.01) than that of the conventional group from 10 to 19 days of culture. The RCCS obviously enhanced the proliferation of rabbit keratocytes and facilitated the cells' growth into or on the dehydrated bovine acellular corneal stroma. Cells showed more natural morphology.
机译:这项研究探讨了模拟微重力下培养的角膜细胞的变化。使用胶原酶消化法从兔角膜分离出角质形成细胞。将细胞以1 x 10(4)个细胞/ mL的密度播种在旋转细胞培养系统(RCCS)的55mL容量的高纵横比容器(HARV)中。脱水的牛无细胞角膜基质(5 x 5 x 1 mm,n = 30)用作角膜细胞培养的载体。在培养的第一,第二和第三周,转速分别设置为15、20和30 rpm。组织学评估表明,模拟微重力培养中的角膜细胞生长为载体,而常规重力作用下的角膜细胞生长在载体表面。扫描电子显微镜评估显示,培养19天后,载体上的角膜细胞呈球形,并散布在胶原纤维之间。细胞呈树突状或纺锤形,并发展出许多与周围细胞相关的足突。在培养10到19天时,模拟微重力组的吸光度值显着高于常规组(P <0.01)。 RCCS明显增强了兔角膜细胞的增殖,并促进了细胞在脱水的牛脱细胞角膜基质中或在其上的生长。细胞表现出更自然的形态。

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