Solid-state NMR study of discrete environments of bone mineral nanoparticles using phosphorus-31 relaxation
| Autor: | Dariusz Chmielewski, Agnieszka Kaflak, Waclaw Kolodziejski |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Health
Toxicology and Mutagenesis Osteoporosis Biomedical Engineering Mineralogy chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences General Biochemistry Genetics and Molecular Biology Apatite Artificial Intelligence medicine Phosphorus-31 NMR spectroscopy General Pharmacology Toxicology and Pharmaceutics Bone mineral General Immunology and Microbiology biology Chemistry General Neuroscience Phosphorus General Medicine 021001 nanoscience & nanotechnology medicine.disease 0104 chemical sciences Osteopenia Solid-state nuclear magnetic resonance visual_art visual_art.visual_art_medium Osteocalcin biology.protein 0210 nano-technology General Agricultural and Biological Sciences Biomedical engineering |
| Zdroj: | Journal of Applied Biomedicine. 14:321-330 |
| ISSN: | 1214-0287 1214-021X |
| DOI: | 10.1016/j.jab.2016.07.001 |
| Popis: | Bone mineral nanoparticles, residing between collagenous fibres, contain a crystalline apatite core (CAC) covered by an amorphous hydrated surface layer (AHSL). The main objectives of this work were to characterize the nanoparticles of human bone mineral and their discrete CAC and AHSL regions and relate this information to bone diseases. This pilot study involved 18 postmenopausal women suffering from osteoarthritis together with osteoporosis or osteopenia. Trabecular tissue specimens were acquired from the femoral intertrochanteric region during total hip arthroplasty. The specimens of whole bone were examined by 31P solid-state NMR (ssNMR) to measure the concentration ratio of phosphorus in the AHSL and CAC locations, together with their 31P linewidths and spin-lattice relaxation times. It was found that the AHSL region of the studied specimens contained 13–24% apatite phosphorus. The magnitude, hydration and structural order of AHSL and CAC were dependent on the progress of the pertinent diseases. Thus, the 31P ssNMR spectroscopy can be used ex vivo to selectively analyse the discrete nanoapatite environments in whole bone specimens and possibly assist in postoperative medical diagnostics. |
| Databáze: | OpenAIRE |
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