骨化模型的骨化模式,teleost和哺乳动物模型:化软骨与骨基质对比
Ugo E Pazzaglia1,2, Marcella Reguzzoni2, Chiara Milanese3
1DSMC, University of Brescia, Brescia, Italy.
Microscopy research and technique
|July 26, 2023
概括
巴托伊德拉贾星座表现出独特的骨化,与哺乳动物和远模型不同. 它的软骨仍然没有重塑,含有更高的水分和无形的生物酸盐,支持无血管组织中的冠状细胞存活.
科学领域:
- 对比的骨生物学 骨生物学
- 生物矿物化 生物矿物化
- 脊椎动物的古生物学
背景情况:
- 骨矿化对于运动至关重要,因为它会使移动元素变硬.
- 内分体骨化是哺乳动物骨发育的模型.
- 石软骨的化呈现了骨矿化的一个替代模型.
研究的目的:
- 为了比较Raja asterias的骨石化模式与哺乳动物 (Homo sapiens) 和远方动物 (Xiphias gladius) 的内分离体骨化.
- 为了研究R. asterias中化软骨的物理化学特性.
- 了解不同骨矿化策略的进化影响.
主要方法:
- 组织学和组织化学.
- 扫描电子显微镜与能量分散式X射线分析 (SEM/EDAX)
- 热重力测量分析 (TGA),微分扫描热量测量 (DSC) 和富里埃变换红外光谱 (FTIR) 技术.
主要成果:
- 与Homo sapiens和Xiphias gladius骨相比,Raja asterias的化软骨显示出更高的水含量和更无形的生物酸盐.
- 与内分泌骨化不同,骨被骨所取代,R. asterias的软骨在整个生命中保持不重塑.
- R. asterias 呈现较低的矿物质结晶度和较高的无形原比例,促进间歇性液体扩散和无血管组织中的冠状细胞存活.
结论:
- 拉贾·阿斯特里亚斯采用一种独特的骨化策略,其特点是持久的,未经改造的化软骨,具有独特的物理化学性质.
- 这种不同的策略允许在缺乏血管或管道系统的化基质中保持和生长.
- 这些发现提供了关于骨矿化从到四肢的进化适应的见解,可能支持机械状态理论或有机/无机相变.
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