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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Cellular orchestrated biomineralization of crystalline composites on implant surfaces by the eastern oyster, Crassostrea virginica (Gmelin, 1791)
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Cellular orchestrated biomineralization of crystalline composites on implant surfaces by the eastern oyster, Crassostrea virginica (Gmelin, 1791)

机译：东部牡蛎Crassostrea virginica对植入物表面的晶体复合材料进行细胞精心安排的生物矿化作用（Gmelin，1791年）

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摘要

The phylum Mollusca is unmatched in the mastery of cellular-engineered shell microstructures, producing shells that are visually elegant, structurally complex and fracture resistant. Shell formation in the eastern oyster, Crassostrea virginica is a process that involves both hemocytes (blood cells) and the outer mantle epithelial cells (OME). This study reports the secretion of an extracellular matrix (ECM) and cellular activity during shell layer formation by observing folia and prismatic development on different metal alloy surfaces (Ti6Al4V titanium, 7075-T6 aluminum, and 316 L stainless steel) implanted under the OME. During prism formation, a close association was observed between the ECM surrounding the prisms, the OME, and hemocytes. The prismatic ECM walls appeared to originate from the OME surface and were auto-fluorescent. During folia formation, an initial infiltration response of hemocytes to the implant surface was observed followed by the formation of a thin translucent ECM membrane onto which exosome-like vesicles, some containing crystals, deposited. These structures progressively organized into well-defined folia mineral. It is proposed that molluscan shell is formed through a series of coordinated events involving cells and cell products whereby both organic and mineral phases are secreted, organized, and simultaneously formed. The coordination of cells and cell products for shell synthesis opens a new realm of cellular control not previously explored in shell formation. (C) 2014 Elsevier B.V. All rights reserved.
机译：软体动物门在细胞工程化的外壳微观结构方面无与伦比，可生产出外观精美，结构复杂且抗断裂的外壳。东部牡蛎Crassostrea virginica的壳形成过程涉及血细胞（血液细胞）和地幔上皮细胞（OME）。这项研究通过观察在OME下植入的不同金属合金表面（Ti6Al4V钛，7075-T6铝和316 L不锈钢）上的叶片和棱柱形发展，报道了壳层形成过程中细胞外基质（ECM）的分泌和细胞活动。在棱柱形成期间，观察到棱柱周围的ECM，OME和血细胞之间存在紧密的联系。棱柱形ECM壁似乎起源于OME表面，并且是自发荧光的。在叶形成过程中，观察到血细胞对植入物表面的初始浸润反应，随后形成了薄的半透明ECM膜，在其上沉积了外泌体样小泡，其中一些含有晶体。这些结构逐渐组织成明确的叶片矿物。提出软体动物壳是通过一系列协调的事件形成的，这些事件涉及细胞和细胞产物，从而有机，矿物质相被分泌，组织和同时形成。细胞和细胞产物用于壳合成的协调开辟了细胞控制的新领域，该领域以前没有在壳形成中探索。 （C）2014 Elsevier B.V.保留所有权利。

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