Cell interactions influence the pattern of biomineralization in the Ilyanassa obsoleta (Mollusca) embryo.
Cell interactions influence the pattern of biomineralization in the Ilyanassa obsoleta (Mollusca) embryo.
复制标题
细胞相互作用影响 Ilyanassa obsoleta（软体动物）胚胎中的生物矿化模式。
DOI：
10.1002/aja.1001950305
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
McCain,ER
中科院分区：
文献类型：
--
作者：
McCain,ER
Ilyanassa obsoletalarvae有两个含碳酸钙的器官，壳和静泡，它们来自5个微细胞（2a, 2c, 2d, 3c, 3d）。“内壳”，一种异常的内部碳酸钙团块，以前在正常诱导壳和静泡的细胞被移除时被观察到。本研究利用多细胞缺失来研究这些产生碳酸钙的前体如何控制生物矿化模式，无论是在外壳、静泡还是内壳中。结果表明，内壳细胞仅来源于这五种细胞中的任何一种。然而，内壳产生的频率在数量上存在差异，这取决于哪些细胞以及多少细胞被删除。一般来说，由于去除了一些产生碳酸钙的细胞，当外壳或静泡的产生减少时，内壳被沉积下来。内壳的存在可以最好地解释为一个或多个细胞被删除后这五个细胞之间相互作用改变的结果。电子衍射和透射电镜显示，内壳在结构和晶体形态上都不同于普通壳，也可以由静泡前体产生。因此，缺失和电子显微镜数据都支持这样的解释，即当细胞之间的细胞通讯被破坏时，内壳的发育是由产生壳和静泡的细胞控制的。©1993 Wiley‐Liss, Inc。
Ilyanassa obsoletalarvae have two calcium carbonate‐containing organs, shell and statocyst, which are derived from five micromere cells (2a, 2c, 2d, 3c, 3d). “Internal shell,” an abnormal, internal calcium carbonate mass, was previously observed when cells which normally induce shell and statocyst were removed. This study utilizes multiple‐cell deletions to examine how these calcium carbonate‐producing precursors control the pattern of biomineralization, whether it is in external shell, statocyst, or internal shell. It was demonstrated that internal shell was solely derived from any of these five cells. However, there was a quantitative difference in the frequency of internal shell production depending upon which cells, as well as how many, are deleted. In general, when external shell or statocyst production was diminished, as the result of removing several of the calcium carbonate‐producing cells, internal shell was deposited instead. The presence of internal shell can best be explained as the result of altered interactions between these five cells after one or more have been deleted. Electron diffraction and transmission electron microscopy show that internal shell differs from normal shell in both structure and crystal morphology and it can also be produced by statocyst precursors. Thus, both the deletion and electron microscopy data support the interpretation that the development of internal shell is controlled by shell‐ and statocyst‐producing cells when the cell communication between these cells is disrupted. © 1993 Wiley‐Liss, Inc.