Department of Rheumatology, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary.
Supervisory Authority for Regulatory Affairs, Geological Survey, 1143 Budapest, Hungary.
Int J Mol Sci. 2024 Oct 5;25(19):10733. doi: 10.3390/ijms251910733.
Some studies have used physical techniques for the assessment of bone structure and composition. However, very few studies applied multiple techniques, such as those described below, at the same time. The aim of our study was to determine the chemical and mineralogical/organic composition of bovine tibial bone samples using geophysical/geochemical reference techniques. X-ray diffraction (XRD), thermogravimetry (TG), Fourier-transform infrared spectrometry with attenuated total reflectance accessory (FTIR-ATR), inductively coupled mass spectrometry (ICP-MS) and inductively coupled optical emission spectrometry (ICP-OES) were applied to measure the organic and inorganic composition of 14 bovine bone samples. In addition, peripheral quantitative CT (QCT) was used to assess BMD in these bones. We were able to define the total composition of the studied bone samples. ICP-OES and ICP-MS techniques were used to determine the major and trace element composition. The X-ray analysis could detect inorganic crystalline compounds of bones, such as bioapatite, and its degree of ordering, indicating whether the bones belong to a younger or older individual. The total volatile content of the samples was calculated using TG and resulted in about 35 weight% (wt%). This, together with the 65 wt% total resulting from the chemical analysis (i.e., inorganic components), yielded a total approaching 100 wt%. As a large portion of the volatile content (HO, CO, etc.) was liberated from the organic components and, subordinately, from bioapatite, it could be concluded that the volatile-to-solid ratio of the examined bone samples was ~35:65. The FTIR-ATR analysis revealed that the organic portion consists of collagens containing amide groups, as their typical bands (OH, CH, CO, NC) were clearly identified in the infrared spectra. Numerous parameters of bone composition correlated with BMD as determined by QCT. In conclusion, we performed a complex evaluation of bovine bones to test multiple geophysical/geochemical techniques in bone research in association with QCT bone densitometry. From a medical point of view, the composition of the studied bones could be reliably examined by these methods.
一些研究已经使用物理技术来评估骨结构和组成。然而,很少有研究同时应用多种技术,如下所述。我们的研究目的是使用地球物理/地球化学参考技术来确定牛胫骨骨样本的化学和矿物/有机组成。X 射线衍射 (XRD)、热重分析 (TG)、傅里叶变换衰减全反射附件红外光谱 (FTIR-ATR)、电感耦合质谱 (ICP-MS) 和电感耦合光学发射光谱 (ICP-OES) 用于测量 14 个牛骨样本的有机和无机组成。此外,外周定量 CT (QCT) 用于评估这些骨骼的 BMD。我们能够定义研究骨样本的总组成。ICP-OES 和 ICP-MS 技术用于确定主要和微量元素组成。X 射线分析可以检测骨中的无机结晶化合物,如生物磷灰石及其有序度,指示骨骼属于年轻个体还是年老个体。使用 TG 计算样品的总挥发性含量,结果约为 35wt%(重量%)。这与化学分析(即无机成分)得出的 65wt%总含量相结合,得出总含量接近 100wt%。由于大部分挥发性成分(HO、CO 等)从有机成分中释放出来,其次从生物磷灰石中释放出来,可以得出结论,所检查的骨样本的挥发性-固体比约为 35:65。FTIR-ATR 分析表明,有机部分由含有酰胺基团的胶原蛋白组成,因为其典型带(OH、CH、CO、NC)在红外光谱中清晰识别。骨组成的许多参数与 QCT 确定的 BMD 相关。总之,我们对牛骨进行了复杂的评估,以测试与 QCT 骨密度测定相关的多种地球物理/地球化学技术在骨研究中的应用。从医学角度来看,这些方法可以可靠地检查研究骨的组成。
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