1
|
Li L, Li H, Wang Q, Xue Y, Dai Y, Dong Y, Shao M, Lyu F. Hydroxyapatite Nanoparticles Promote the Development of Bone Microtissues for Accelerated Bone Regeneration by Activating the FAK/Akt Pathway. ACS Biomater Sci Eng 2024. [PMID: 38848471 DOI: 10.1021/acsbiomaterials.4c00574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2024]
Abstract
Scaffold-free bone microtissues differentiated from mesenchymal stem cell (MSC) spheroids offer great potential for bottom-up bone tissue engineering as a direct supply of cells and osteogenic signals. Many biomaterials or biomolecules have been incorporated into bone microtissues to enhance their osteogenic abilities, but these materials are far from clinical approval. Here, we aimed to incorporate hydroxyapatite (HAP) nanoparticles, an essential component of bone matrix, into MSC spheroids to instruct their osteogenic differentiation into bone microtissues and further self-organization into bone organoids with a trabecular structure. Furthermore, the biological interaction between HAP nanoparticles and MSCs and the potential molecular mechanisms in the bone development of MSC spheroids were investigated by both in vitro and in vivo studies. As a result, improved cell viability and osteogenic abilities were observed for the MSC spheroids incorporated with HAP nanoparticles at a concentration of 30 μg/mL. HAP nanoparticles could promote the sequential expression of osteogenic markers (Runx2, Osterix, Sclerostin), promote the expression of bone matrix proteins (OPN, OCN, and Collagen I), promote the mineralization of the bone matrix, and thus promote the bone development of MSC spheroids. The differentiated bone microtissues could further self-organize into linear, lamellar, and spatial bone organoids with trabecular structures. More importantly, adding FAK or Akt inhibitors could decrease the level of HAP-induced osteogenic differentiation of bone microtissues. Finally, excellent new bone regeneration was achieved after injecting bone microtissues into cranial bone defect models, which could also be eliminated by the Akt inhibitor. In conclusion, HAP nanoparticles could promote the development of bone microtissues by promoting the osteogenic differentiation of MSCs and the formation and mineralization of the bone matrix via the FAK/Akt pathway. The bone microtissues could act as individual ossification centers and self-organize into macroscale bone organoids, and in this meaning, the bone microtissues could be called microscale bone organoids. Furthermore, the bone microtissues revealed excellent clinical perspectives for injectable cellular therapies for bone defects.
Collapse
Affiliation(s)
- Linli Li
- Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai 200040, China
- Department of Orthopedics, Shanghai Fifth People's Hospital, Fudan University, Shanghai 200240, China
| | - Hailong Li
- Department of Orthopedics, Shanghai Fifth People's Hospital, Fudan University, Shanghai 200240, China
| | - Qi Wang
- Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Yitong Xue
- Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Yuan Dai
- Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Youhai Dong
- Department of Orthopedics, Shanghai Fifth People's Hospital, Fudan University, Shanghai 200240, China
| | - Minghao Shao
- Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Feizhou Lyu
- Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai 200040, China
- Department of Orthopedics, Shanghai Fifth People's Hospital, Fudan University, Shanghai 200240, China
| |
Collapse
|
2
|
San Martín Molina I, Fratini M, Campi G, Burghammer M, Grünewald TA, Salo RA, Narvaez O, Aggarwal M, Tohka J, Sierra A. A multiscale tissue assessment in a rat model of mild traumatic brain injury. J Neuropathol Exp Neurol 2022; 82:71-83. [PMID: 36331507 PMCID: PMC9764078 DOI: 10.1093/jnen/nlac100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Diffusion tensor imaging (DTI) has demonstrated the potential to assess the pathophysiology of mild traumatic brain injury (mTBI) but correlations of DTI findings and pathological changes in mTBI are unclear. We evaluated the potential of ex vivo DTI to detect tissue damage in a mild mTBI rat model by exploiting multiscale imaging methods, histology and scanning micro-X-ray diffraction (SμXRD) 35 days after sham-operation (n = 2) or mTBI (n = 3). There were changes in DTI parameters rostral to the injury site. When examined by histology and SμXRD, there was evidence of axonal damage, reduced myelin density, gliosis, and ultrastructural alterations in myelin that were ongoing at the experimental time point of 35 days postinjury. We assessed the relationship between the 3 imaging modalities by multiple linear regression analysis. In this analysis, DTI and histological parameters were moderately related, whereas SμXRD parameters correlated weakly with DTI and histology. These findings suggest that while DTI appears to distinguish tissue changes at the microstructural level related to the loss of myelinated axons and gliosis, its ability to visualize alterations in myelin ultrastructure is limited. The use of several imaging techniques represents a novel approach to reveal tissue damage and provides new insights into mTBI detection.
Collapse
Affiliation(s)
| | - Michela Fratini
- Institute of Nanotechnology-CNR c/o Physics Department, Sapienza University of Rome, Rome, Italy,IRCCS Fondazione Santa Lucia, Rome, Italy
| | | | | | - Tilman A Grünewald
- European Synchrotron Radiation Facility, Grenoble Cedex, France,Aix-Marseille Université, CNRS, Centrale Marseille, Institut Fresnel, Marseille, France
| | - Raimo A Salo
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Omar Narvaez
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Manisha Aggarwal
- Russell H. Morgan Department of Radiology and Radiological Science, John Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jussi Tohka
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Alejandra Sierra
- Send correspondence to: Alejandra Sierra, PhD, A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland (Kuopio Campus), PO Box 1627, Neulaniementie 2, FI-70211 Kuopio, Finland; E-mail:
| |
Collapse
|
3
|
Chen M, Gao L, Sheng W, Wang S, Yang F. Numerical iteration method to reduce the surface shape error of a bendable mirror in synchrotron radiation. APPLIED OPTICS 2022; 61:2096-2102. [PMID: 35297901 DOI: 10.1364/ao.451088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 02/11/2022] [Indexed: 06/14/2023]
Abstract
X-ray mirrors with high focusing performance are extensively used in the synchrotron radiation field. Especially for vertical reflecting bendable mirrors, many elements such as gravity, extended parts used for the bending mechanism, etc., usually affect the surface shape precision. There are no effective methods to remove all these errors at this point. However, an iteration method can be adopted to solve this problem. In this paper, a novel, to the best of our knowledge, iteration method on decreasing the error between the practice surface shape and the desired one is proposed. Not only can the precision of the surface shape be realized by this method, but also computational efficiency. Errors induced by gravity can be compensated for by an analytical method, while errors caused by the extended parts should be eliminated by a numerical method. Therefore, two main kinds of errors-gravity and parts of clamping-can be removed by iteration. Some examples are presented to illustrate the advantages of this method by comparison with the regular one.
Collapse
|
4
|
Du T, Niu Y, Jia Z, Liu Y, Qiao A, Yang H, Niu X. Orthophosphate and alkaline phosphatase induced the formation of apatite with different multilayered structures and mineralization balance. NANOSCALE 2022; 14:1814-1825. [PMID: 35037677 DOI: 10.1039/d1nr06016c] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Mineralized collagen is a natural organic-inorganic composite. The combination of organic collagen and inorganic apatite to form different nanostructures is the key to producing bone substitutes with biomechanical properties that are as identical to normal bone as possible. However, the formation of apatite with different nanostructures during collagen mineralization is unexplored. Here, pyrophosphate (Pyro-P), as an important hydrolysate of adenosine triphosphate in the body, was introduced to prepare mineralized collagen under the regulation of alkaline phosphatase (ALP) and orthophosphate (Ortho-P). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) results showed that mineralized collagen, which combined with different crystallinities and multilayered structured apatite, was successfully prepared. A combination of ion chromatography (IC), Fourier transform infrared (FTIR) spectroscopy, circular dichroism (CD), and thermogravimetry (TG) analyses revealed the crucial role of Ortho-P in the formation of multilayered flower-shaped apatite with different crystallinities and in the maintenance of mineralization balance. Mineralization balance is of great significance for maintaining normal bone morphology during bone regeneration. Overall, our results provide a promising method to produce new bone substitute materials for the repair of large bone defects and a deeper insight into the mechanisms of biomineralization.
Collapse
Affiliation(s)
- Tianming Du
- Beijing International Science and Technology Cooperation Base for Intelligent Physiological Measurement and Clinical Transformation, Department of Biomedical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China.
| | - Yumiao Niu
- Beijing International Science and Technology Cooperation Base for Intelligent Physiological Measurement and Clinical Transformation, Department of Biomedical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China.
| | - Zhenzhen Jia
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China.
| | - Youjun Liu
- Beijing International Science and Technology Cooperation Base for Intelligent Physiological Measurement and Clinical Transformation, Department of Biomedical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China.
| | - Aike Qiao
- Beijing International Science and Technology Cooperation Base for Intelligent Physiological Measurement and Clinical Transformation, Department of Biomedical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China.
| | - Haisheng Yang
- Beijing International Science and Technology Cooperation Base for Intelligent Physiological Measurement and Clinical Transformation, Department of Biomedical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China.
| | - Xufeng Niu
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China.
| |
Collapse
|
5
|
Nanoscale Phase Separation of Incommensurate and Quasi-Commensurate Spin Stripes in Low Temperature Spin Glass of La2−xSrxNiO4. CONDENSED MATTER 2021. [DOI: 10.3390/condmat6040045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
While spin striped phases in La2−xSrxNiO4+y for 0.25 < x < 0.33 are the archetypal case of a 1D spin density wave (SDW) phase in doped antiferromagnetic strongly correlated perovskites, few information is available on the SDW spatial organization. In this context, we have measured the spatial variation of the wave vector of the SDW reflection profile by scanning micro X-ray diffractions with a coherent beam. We obtained evidence of a SDW order–disorder transition by lowering a high temperature phase (T > 50 K) to a low temperature phase (T < 50 K). We have identified quasi-commensurate spin stripe puddles in the ordered phase at 50 < T < 70 K, while the low temperature spin glassy phase presents a nanoscale phase separation of T = 30 K, with the coexistence of quasi-commensurate and incommensurate spin stripe puddles assigned to the interplay of quantum frustration and strong electronic correlations.
Collapse
|
6
|
Functional Nanoscale Phase Separation and Intertwined Order in Quantum Complex Materials. CONDENSED MATTER 2021. [DOI: 10.3390/condmat6040040] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Nanoscale phase separation (NPS), characterized by particular types of correlated disorders, plays an important role in the functionality of high-temperature superconductors (HTS). Our results show that multiscale heterogeneity is an essential ingredient of quantum functionality in complex materials. Here, the interactions developing between different structural units cause dynamical spatiotemporal conformations with correlated disorder; thus, visualizing conformational landscapes is fundamental for understanding the physical properties of complex matter and requires advanced methodologies based on high-precision X-ray measurements. We discuss the connections between the dynamical correlated disorder at nanoscale and the functionality in oxygen-doped perovskite superconducting materials.
Collapse
|
7
|
Di Santo R, Romanò S, Mazzini A, Jovanović S, Nocca G, Campi G, Papi M, De Spirito M, Di Giacinto F, Ciasca G. Recent Advances in the Label-Free Characterization of Exosomes for Cancer Liquid Biopsy: From Scattering and Spectroscopy to Nanoindentation and Nanodevices. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1476. [PMID: 34199576 PMCID: PMC8230295 DOI: 10.3390/nano11061476] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/24/2021] [Accepted: 05/27/2021] [Indexed: 12/26/2022]
Abstract
Exosomes (EXOs) are nano-sized vesicles secreted by most cell types. They are abundant in bio-fluids and harbor specific molecular constituents from their parental cells. Due to these characteristics, EXOs have a great potential in cancer diagnostics for liquid biopsy and personalized medicine. Despite this unique potential, EXOs are not yet widely applied in clinical settings, with two main factors hindering their translational process in diagnostics. Firstly, conventional extraction methods are time-consuming, require large sample volumes and expensive equipment, and often do not provide high-purity samples. Secondly, characterization methods have some limitations, because they are often qualitative, need extensive labeling or complex sampling procedures that can induce artifacts. In this context, novel label-free approaches are rapidly emerging, and are holding potential to revolutionize EXO diagnostics. These methods include the use of nanodevices for EXO purification, and vibrational spectroscopies, scattering, and nanoindentation for characterization. In this progress report, we summarize recent key advances in label-free techniques for EXO purification and characterization. We point out that these methods contribute to reducing costs and processing times, provide complementary information compared to the conventional characterization techniques, and enhance flexibility, thus favoring the discovery of novel and unexplored EXO-based biomarkers. In this process, the impact of nanotechnology is systematically highlighted, showing how the effectiveness of these techniques can be enhanced using nanomaterials, such as plasmonic nanoparticles and nanostructured surfaces, which enable the exploitation of advanced physical phenomena occurring at the nanoscale level.
Collapse
Affiliation(s)
- Riccardo Di Santo
- Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Roma, Italy; (R.D.S.); (S.R.); (A.M.); (G.N.); (M.P.); (F.D.G.)
| | - Sabrina Romanò
- Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Roma, Italy; (R.D.S.); (S.R.); (A.M.); (G.N.); (M.P.); (F.D.G.)
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica Del Sacro Cuore, 00168 Roma, Italy
| | - Alberto Mazzini
- Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Roma, Italy; (R.D.S.); (S.R.); (A.M.); (G.N.); (M.P.); (F.D.G.)
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica Del Sacro Cuore, 00168 Roma, Italy
| | - Svetlana Jovanović
- “Vinča” Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia;
| | - Giuseppina Nocca
- Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Roma, Italy; (R.D.S.); (S.R.); (A.M.); (G.N.); (M.P.); (F.D.G.)
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Gaetano Campi
- Rome International Centre Materials Science Superstripes RICMASS, via dei Sabelli 119A, 00185 Rome, Italy;
- Institute of Crystallography, CNR, via Salaria Km 29. 300, Monterotondo Stazione, 00016 Roma, Italy
| | - Massimiliano Papi
- Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Roma, Italy; (R.D.S.); (S.R.); (A.M.); (G.N.); (M.P.); (F.D.G.)
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica Del Sacro Cuore, 00168 Roma, Italy
| | - Marco De Spirito
- Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Roma, Italy; (R.D.S.); (S.R.); (A.M.); (G.N.); (M.P.); (F.D.G.)
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica Del Sacro Cuore, 00168 Roma, Italy
| | - Flavio Di Giacinto
- Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Roma, Italy; (R.D.S.); (S.R.); (A.M.); (G.N.); (M.P.); (F.D.G.)
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica Del Sacro Cuore, 00168 Roma, Italy
| | - Gabriele Ciasca
- Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Roma, Italy; (R.D.S.); (S.R.); (A.M.); (G.N.); (M.P.); (F.D.G.)
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica Del Sacro Cuore, 00168 Roma, Italy
| |
Collapse
|
8
|
Bertolotti F, Carmona FJ, Dal Sasso G, Ramírez-Rodríguez GB, Delgado-López JM, Pedersen JS, Ferri F, Masciocchi N, Guagliardi A. On the amorphous layer in bone mineral and biomimetic apatite: A combined small- and wide-angle X-ray scattering analysis. Acta Biomater 2021; 120:167-180. [PMID: 32438109 DOI: 10.1016/j.actbio.2020.04.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 04/04/2020] [Accepted: 04/13/2020] [Indexed: 01/02/2023]
Abstract
The occurrence of an amorphous calcium phosphate layer covering the crystalline apatite core has been suggested to be an intrinsic feature of both bone mineral and synthetic biomimetic analogs. However, an exahustive quantitative picture of the amorphous-crystalline relationship in these materials is still missing. Here, we present a multiple scale modelling that combines small-angle X-ray scattering (SAXS) and synchrotron wide-angle X-ray total scattering (WAXTS) analyses to investigate the amorphous-crystalline spatial interplay in bone sample and biomimetic carbonated nano-apatites. SAXS analysis indicates the presence of a single morphology consisting of tiny nanoplates (NPLs) and provides a measure of their thickness (falling in the 3-5 nm range). WAXTS analysis was performed by developing atomistic models of apatite NPLs incorporating lattice strain, mostly attributed to the carbonate content, and calculating the X-ray patterns using the Debye Scattering Equation. Upon model optimization, the size and strain parameters of the crystalline platelets were derived and the amorphous component, co-existing with the crystalline one, separated and quantified (in the 23-33 wt% range). Notably, the thickness of the apatite core was found to exhibit nearly null (bone) or minor (< 0.5 nm, biomimetic samples) deviations from that of the entire NPLs, suggesting that the amorphous material remains predominantly distributed along the lateral sides of the NPLs, in a core-crown-like arrangement. The lattice strain analysis indicates a significant stiffness along the c axis, which is comparable in bone and synthetic samples, and larger deformations in the other directions. STATEMENT OF SIGNIFICANCE: Current models of bone mineral and biomimetic nanoapatites suggest the occurrence of an amorphous layer covering the apatitic crystalline nanoplates in a core-shell arrangement. By combining X-ray scattering techniques in the small and wide angle regions, we propose a joint atomic-to-nanometre scale modelling to investigate the amorphous-crystalline interplay within the nanoplates. Estimates are extracted for the thickness of the entire nanoplates and the crystalline core, together with the quantification of the amorphous fraction and apatite lattice strain. Based on the thickness matching, the location of the amorphous material mostly along the edges of the nanoplates is inferred, with a vanishing or very thin layer in the thickness direction, suggesting a core-crown-like arrangement, with possible implications on the mineral surface reactivity.
Collapse
Affiliation(s)
- Federica Bertolotti
- Department of Science and High Technology and To.Sca.Lab, University of Insubria, Via Valleggio 11, I-22100 Como, Italy
| | - Francisco J Carmona
- Department of Science and High Technology and To.Sca.Lab, University of Insubria, Via Valleggio 11, I-22100 Como, Italy
| | - Gregorio Dal Sasso
- Institute of Crystallography and To.Sca.Lab, Consiglio Nazionale delle Ricerche, Via Valleggio 11, I-22100 Como, Italy
| | - Gloria B Ramírez-Rodríguez
- Department of Science and High Technology and To.Sca.Lab, University of Insubria, Via Valleggio 11, I-22100 Como, Italy; Department of Inorganic Chemistry, University of Granada, Av. Fuentenueva S/N, E-18071 Granada, Spain
| | - José Manuel Delgado-López
- Department of Inorganic Chemistry, University of Granada, Av. Fuentenueva S/N, E-18071 Granada, Spain
| | - Jan Skov Pedersen
- Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus, Denmark
| | - Fabio Ferri
- Department of Science and High Technology and To.Sca.Lab, University of Insubria, Via Valleggio 11, I-22100 Como, Italy
| | - Norberto Masciocchi
- Department of Science and High Technology and To.Sca.Lab, University of Insubria, Via Valleggio 11, I-22100 Como, Italy.
| | - Antonietta Guagliardi
- Institute of Crystallography and To.Sca.Lab, Consiglio Nazionale delle Ricerche, Via Valleggio 11, I-22100 Como, Italy.
| |
Collapse
|
9
|
Mazzini A, Palermo F, Pagliei V, Romanò S, Papi M, Zimatore G, Falsini B, Rizzo S, De Spirito M, Ciasca G, Minnella AM. A time-dependent study of nano-mechanical and ultrastructural properties of internal limiting membrane under ocriplasmin treatment. J Mech Behav Biomed Mater 2020; 110:103853. [PMID: 32501223 DOI: 10.1016/j.jmbbm.2020.103853] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 04/06/2020] [Accepted: 05/05/2020] [Indexed: 01/22/2023]
Abstract
Vitreomacular traction (VMT) syndrome has only been surgically treated for a long time. Recently, enzymatic vitreolysis with ocriplasmin has emerged as a possible option to release VMT and, in some cases, close full thickness macular holes (FTMHs). Despite its clinical relevance, gathering information about the ocriplasmin-induced alterations of the Inner Limiting Membrane (ILM) of the retina in a clinical study is a complex task, mainly because of the inter-individual variability among patients. To obtain more insights into the mechanism underlying the drug action, we studied in-vitro the mechanical and morphological changes of the ILM using Atomic Force Microscopy (AFM). To this aim, we measured the ILM average Young's modulus (YM), hysteresis (H) and adhesion work (A) over time under ocriplasmin treatment. Our data unveil a time-dependent increase in the membrane YM of 19% of its initial value, along with changes in its adhesive and dissipative behavior. Such modifications well correlate with the morphological alterations detected in the AFM imaging mode. Taken all together, the results here presented provide more insights into the mechanism underlying the ocriplasmin action in-vivo, suggesting that it is only able to alter the top-most layer of the vitreal side of the membrane, not compromising the inner ILM structure.
Collapse
Affiliation(s)
- Alberto Mazzini
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, Roma, Italy; Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italy
| | - Francesca Palermo
- Consiglio Nazionale delle Ricerche, Istituto di Nanotecnologia (NANOTEC), Roma, Italy; Dipartimento di Fisica, Università della Calabria, Arcavacata di Rende (CS), Italy
| | - Valeria Pagliei
- Department of Biotechnological and Applied Clinical Science, University of L'Aquila, L'Aquila, Italy
| | - Sabrina Romanò
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, Roma, Italy
| | - Massimiliano Papi
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, Roma, Italy; Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italy
| | | | - Benedetto Falsini
- Istituto di Oftalmologia, Università Cattolica del Sacro Cuore, Roma, Italy
| | - Stanislao Rizzo
- Istituto di Oftalmologia, Università Cattolica del Sacro Cuore, Roma, Italy
| | - Marco De Spirito
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, Roma, Italy; Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italy.
| | - Gabriele Ciasca
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, Roma, Italy; Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italy.
| | | |
Collapse
|
10
|
Di Gioacchino M, Bianconi A, Burghammer M, Ciasca G, Bruni F, Campi G. Myelin basic protein dynamics from out-of-equilibrium functional state to degraded state in myelin. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1862:183256. [PMID: 32145283 DOI: 10.1016/j.bbamem.2020.183256] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 02/28/2020] [Accepted: 03/02/2020] [Indexed: 01/15/2023]
Abstract
Living matter is a quasi-stationary out-of-equilibrium system; in this physical condition, structural fluctuations at nano- and meso-scales are needed to understand the physics behind its biological functionality. Myelin has a simple ultrastructure whose fluctuations show correlated disorder in its functional out-of-equilibrium state. However, there is no information on the relationship between this correlated disorder and the dynamics of the intrinsically disordered Myelin Basic Protein (MBP) which is expected to influence the membrane structure and overall functionality. In this work, we have investigated the role of this protein structural dynamics in the myelin ultrastructure fluctuations in various conditions, by using synchrotron Scanning micro X Ray Diffraction and Small Angle X ray Scattering. We have induced the crossover from out-of-equilibrium functional state to in-equilibrium degeneration changing the pH to values far from physiological condition. The observed compression of the cytosolic layer thickness probes that the intrinsic large MBP fluctuations preserve the cytosol structure also in the degraded state. Thus, the transition of myelin ultrastructure from correlated to uncorrelated disordered state, is principally affected by the deformation of the membrane and extracellular domain.
Collapse
Affiliation(s)
- Michael Di Gioacchino
- Dipartimento di Scienze, Università degli Studi Roma Tre, Via della Vasca Navale 84, 00146 Roma, Italy; Institute of Crystallography, CNR, via Salaria, Km 29.300, 00015 Monterotondo, Roma, Italy; Rome International Center for Materials Science Superstripes (RICMASS), Via dei Sabelli 119A, 00185 Roma, Italy.
| | - Antonio Bianconi
- Institute of Crystallography, CNR, via Salaria, Km 29.300, 00015 Monterotondo, Roma, Italy; Rome International Center for Materials Science Superstripes (RICMASS), Via dei Sabelli 119A, 00185 Roma, Italy; National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409 Moscow, Russia
| | - Manfred Burghammer
- European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, BP220, 38043 Grenoble Cedex, France
| | - Gabriele Ciasca
- Physics Institute, Catholic University of Sacred Heart, Largo F. Vito 1, 00168 Rome, Italy
| | - Fabio Bruni
- Dipartimento di Scienze, Università degli Studi Roma Tre, Via della Vasca Navale 84, 00146 Roma, Italy
| | - Gaetano Campi
- Institute of Crystallography, CNR, via Salaria, Km 29.300, 00015 Monterotondo, Roma, Italy
| |
Collapse
|
11
|
Šupová M. The Significance and Utilisation of Biomimetic and Bioinspired Strategies in the Field of Biomedical Material Engineering: The Case of Calcium Phosphat-Protein Template Constructs. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E327. [PMID: 31936830 PMCID: PMC7013803 DOI: 10.3390/ma13020327] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 01/03/2020] [Accepted: 01/07/2020] [Indexed: 02/07/2023]
Abstract
This review provides a summary of recent research on biomimetic and bioinspired strategies applied in the field of biomedical material engineering and focusing particularly on calcium phosphate-protein template constructs inspired by biomineralisation. A description of and discussion on the biomineralisation process is followed by a general summary of the application of the biomimetic and bioinspired strategies in the fields of biomedical material engineering and regenerative medicine. Particular attention is devoted to the description of individual peptides and proteins that serve as templates for the biomimetic mineralisation of calcium phosphate. Moreover, the review also presents a description of smart devices including delivery systems and constructs with specific functions. The paper concludes with a summary of and discussion on potential future developments in this field.
Collapse
Affiliation(s)
- Monika Šupová
- Department of Composites and Carbon Materials, Institute of Rock Structure and Mechanics, The Czech Academy of Sciences, V Holešovičkách 41, 182 09 Prague, Czech Republic
| |
Collapse
|
12
|
The NATO project: nanoparticle-based countermeasures for microgravity-induced osteoporosis. Sci Rep 2019; 9:17141. [PMID: 31748575 PMCID: PMC6868153 DOI: 10.1038/s41598-019-53481-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 10/23/2019] [Indexed: 12/20/2022] Open
Abstract
Recent advances in nanotechnology applied to medicine and regenerative medicine have an enormous and unexploited potential for future space and terrestrial medical applications. The Nanoparticles and Osteoporosis (NATO) project aimed to develop innovative countermeasures for secondary osteoporosis affecting astronauts after prolonged periods in space microgravity. Calcium- and Strontium-containing hydroxyapatite nanoparticles (nCa-HAP and nSr-HAP, respectively) were previously developed and chemically characterized. This study constitutes the first investigation of the effect of the exogenous addition of nCa-HAP and nSr-HAP on bone remodeling in gravity (1 g), Random Positioning Machine (RPM) and onboard International Space Station (ISS) using human bone marrow mesenchymal stem cells (hBMMSCs). In 1 g conditions, nSr-HAP accelerated and improved the commitment of cells to differentiate towards osteoblasts, as shown by the augmented alkaline phosphatase (ALP) activity and the up-regulation of the expression of bone marker genes, supporting the increased extracellular bone matrix deposition and mineralization. The nSr-HAP treatment exerted a protective effect on the microgravity-induced reduction of ALP activity in RPM samples, and a promoting effect on the deposition of hydroxyapatite crystals in either ISS or 1 g samples. The results indicate the exogenous addition of nSr-HAP could be potentially used to deliver Sr to bone tissue and promote its regeneration, as component of bone substitute synthetic materials and additive for pharmaceutical preparation or food supplementary for systemic distribution.
Collapse
|
13
|
Ciasca G, Pagliei V, Minelli E, Palermo F, Nardini M, Pastore V, Papi M, Caporossi A, De Spirito M, Minnella AM. Nanomechanical mapping helps explain differences in outcomes of eye microsurgery: A comparative study of macular pathologies. PLoS One 2019; 14:e0220571. [PMID: 31390353 PMCID: PMC6685617 DOI: 10.1371/journal.pone.0220571] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 07/18/2019] [Indexed: 12/31/2022] Open
Abstract
Many ocular diseases are associated with an alteration of the mechanical and the material properties of the eye. These mechanically-related diseases include macular hole and pucker, two ocular conditions due to the presence of abnormal physical tractions acting on the retina. A complete relief of these tractions can be obtained through a challenging microsurgical procedure, which requires the mechanical peeling of the internal limiting membrane of the retina (ILM). In this paper, we provide the first comparative study of the nanoscale morphological and mechanical properties of the ILM in macular hole and macular pucker. Our nanoscale elastic measurements unveil a different bio-mechanical response of the ILM in the two pathologies, which correlates well to significant differences occurring during microsurgery. The results here presented pave the way to the development of novel dedicated microsurgical protocols based on the material ILM properties in macular hole or pucker. Moreover, they contribute to clarify why, despite a common aetiology, a patient might develop one disease or the other, an issue which is still debated in literature.
Collapse
Affiliation(s)
- Gabriele Ciasca
- Fondazione Policlinico A. Gemelli IRCCS, Roma, Italia
- Istituto di Fisica, Università Cattolica del Sacro Cuore, Roma, Italia
- * E-mail: (GC); (MDS)
| | - Valeria Pagliei
- Fondazione Policlinico A. Gemelli IRCCS, Roma, Italia
- Istituto di Oftalmologia, Università Cattolica del Sacro Cuore, Roma, Italia
| | - Eleonora Minelli
- Fondazione Policlinico A. Gemelli IRCCS, Roma, Italia
- Istituto di Fisica, Università Cattolica del Sacro Cuore, Roma, Italia
| | - Francesca Palermo
- Fondazione Policlinico A. Gemelli IRCCS, Roma, Italia
- Istituto di Fisica, Università Cattolica del Sacro Cuore, Roma, Italia
| | - Matteo Nardini
- Fondazione Policlinico A. Gemelli IRCCS, Roma, Italia
- Istituto di Fisica, Università Cattolica del Sacro Cuore, Roma, Italia
| | - Valentina Pastore
- Department of Medical Science, Neuroscience and Sense Organs, Eye Clinic, University of Bari “A. Moro”, Bari, Italy
| | - Massimiliano Papi
- Fondazione Policlinico A. Gemelli IRCCS, Roma, Italia
- Istituto di Fisica, Università Cattolica del Sacro Cuore, Roma, Italia
| | - Aldo Caporossi
- Fondazione Policlinico A. Gemelli IRCCS, Roma, Italia
- Istituto di Oftalmologia, Università Cattolica del Sacro Cuore, Roma, Italia
| | - Marco De Spirito
- Fondazione Policlinico A. Gemelli IRCCS, Roma, Italia
- Istituto di Fisica, Università Cattolica del Sacro Cuore, Roma, Italia
- * E-mail: (GC); (MDS)
| | - Angelo Maria Minnella
- Fondazione Policlinico A. Gemelli IRCCS, Roma, Italia
- Istituto di Oftalmologia, Università Cattolica del Sacro Cuore, Roma, Italia
| |
Collapse
|
14
|
Efficient Spatial Sampling for AFM-Based Cancer Diagnostics: A Comparison between Neural Networks and Conventional Data Analysis. CONDENSED MATTER 2019. [DOI: 10.3390/condmat4020058] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Atomic force microscopy (AFM) in spectroscopy mode receives a lot of attention because of its potential in distinguishing between healthy and cancer tissues. However, the AFM translational process in clinical practice is hindered by the fact that it is a time-consuming technique in terms of measurement and analysis time. In this paper, we attempt to address both issues. We propose the use of neural networks for pattern recognition to automatically classify AFM force–distance (FD) curves, with the aim of avoiding curve-fitting with the Sneddon model or more complicated ones. We investigated the applicability of this method to the classification of brain cancer tissues. The performance of the classifier was evaluated with receiving operating characteristic (ROC) curves for the approach and retract curves separately and in combination with each other. Although more complex and comprehensive models are required to demonstrate the general applicability of the proposed approach, preliminary evidence is given for the accuracy of the results, and arguments are presented to support the possible applicability of neural networks to the classification of brain cancer tissues. Moreover, we propose a possible strategy to shorten measurement times based on the estimation of the minimum number of FD curves needed to classify a tissue with a confidence level of 0.005. Taken together, these results have the potential to stimulate the design of more effective protocols to reduce AFM measurement times and to get rid of curve-fitting, which is a complex and time-consuming issue that requires experienced staff with a strong data-analysis background.
Collapse
|
15
|
Qasim M, Chae DS, Lee NY. Advancements and frontiers in nano-based 3D and 4D scaffolds for bone and cartilage tissue engineering. Int J Nanomedicine 2019; 14:4333-4351. [PMID: 31354264 PMCID: PMC6580939 DOI: 10.2147/ijn.s209431] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 05/06/2019] [Indexed: 01/23/2023] Open
Abstract
Given the enormous increase in the risks of bone and cartilage defects with the rise in the aging population, the current treatments available are insufficient for handling this burden, and the supply of donor organs for transplantation is limited. Therefore, tissue engineering is a promising approach for treating such defects. Advances in materials research and high-tech optimized fabrication of scaffolds have increased the efficiency of tissue engineering. Electrospun nanofibrous scaffolds and hydrogel scaffolds mimic the native extracellular matrix of bone, providing a support for bone and cartilage tissue engineering by increasing cell viability, adhesion, propagation, and homing, and osteogenic isolation and differentiation, vascularization, host integration, and load bearing. The use of these scaffolds with advanced three- and four-dimensional printing technologies has enabled customized bone grafting. In this review, we discuss the different approaches used for cartilage and bone tissue engineering.
Collapse
Affiliation(s)
- Muhammad Qasim
- Department of BioNano Technology, Gachon University, Seongnam-si, Gyeonggi-do13120, Republic of Korea
| | - Dong Sik Chae
- Department of Orthopedic Surgery, International St. Mary’s Hospital, Catholic Kwandong University College of Medicine, Incheon, Republic of Korea
| | - Nae Yoon Lee
- Department of BioNano Technology, Gachon University, Seongnam-si, Gyeonggi-do13120, Republic of Korea
| |
Collapse
|
16
|
Mastrogiacomo M, Campi G, Cancedda R, Cedola A. Synchrotron radiation techniques boost the research in bone tissue engineering. Acta Biomater 2019; 89:33-46. [PMID: 30880235 DOI: 10.1016/j.actbio.2019.03.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 03/08/2019] [Accepted: 03/13/2019] [Indexed: 01/15/2023]
Abstract
X-ray Synchrotron radiation-based techniques, in particular Micro-tomography and Micro-diffraction, were exploited to investigate the structure of bone deposited in vivo within a porous ceramic scaffold. Bone formation was studied by implanting Mesenchymal Stem Cell (MSC) seeded ceramic scaffolds in a mouse model. Osteoblasts derived from the seeded MSC and from differentiation of cells migrated within the scaffold together with the blood vessels, deposited within the scaffold pores an organic collagenous matrix on which a precursor mineral amorphous liquid-phase, containing Ca++ and PO4-- crystallized filling the gaps between the collagen molecules. Histology offered a valid instrument to investigate the engineered tissue structure, but, unfortunately, limited itself to a macroscopic analysis. The evolution of the X-ray Synchrotron radiation-based techniques and the combination of micro X-ray diffraction with X-ray phase-contrast imaging enabled to study the dynamic of the structural and morphological changes occurring during the new bone deposition, biomineralization and vascularization. In fact, the unique features of Synchrotron radiation, is providing the high spatial resolution probe which is necessary for the study of complex materials presenting heterogeneity from micron-scale to meso- and nano-scale. Indeed, this is the occurrence in the heterogeneous and hierarchical bone tissue where an organic matter, such as the collagenous matrix, interacts with mineral nano-crystals to generate a hybrid multiscale biomaterial with unique physical properties. In this framework, the use of advanced synchrotron radiation techniques allowed to understand and to clarify fundamental aspects of the bone formation process within the bioceramic, i.e. biomineralization and vascularization, including to obtain deeper knowledge on bone deposition, mineralization and reabsorption in different health, aging and pathological conditions. In this review we present an overview of the X-ray Synchrotron radiation techniques and we provide a general outlook of their applications on bone Tissue Engineering, with a focus on our group work. STATEMENT OF SIGNIFICANCE: Synchrotron Radiation techniques for Tissue Engineering In this review we report recent applications of X-ray Synchrotron radiation-based techniques, in particular Microtomography and Microdiffraction, to investigations on the structure of ceramic scaffolds and bone tissue regeneration. Tissue engineering has made significant advances in bone regeneration by proposing the use of mesenchymal stem cells in combination with various types of scaffolds. The efficacy of the biomaterials used to date is not considered optimal in terms of resorbability and bone formation, resulting in a poor vascularization at the implant site. The review largely based on our publications in the last ten years could help the study of the regenerative model proposed. We also believe that the new imaging technologies we describe could be a starting point for the development of additional new techniques with the final aim of transferring them to the clinical practice.
Collapse
|
17
|
Evolution of Complexity in Out-of-Equilibrium Systems by Time-Resolved or Space-Resolved Synchrotron Radiation Techniques. CONDENSED MATTER 2019. [DOI: 10.3390/condmat4010032] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Out-of-equilibrium phenomena are attracting high interest in physics, materials science, chemistry and life sciences. In this state, the study of structural fluctuations at different length scales in time and space are necessary to achieve significant advances in the understanding of the structure-functionality relationship. The visualization of patterns arising from spatiotemporal fluctuations is nowadays possible thanks to new advances in X-ray instrumentation development that combine high-resolution both in space and in time. We present novel experimental approaches using high brilliance synchrotron radiation sources, fast detectors and focusing optics, joint with advanced data analysis based on automated statistical, mathematical and imaging processing tools. This approach has been used to investigate structural fluctuations in out-of-equilibrium systems in the novel field of inhomogeneous quantum complex matter at the crossing point of technology, physics and biology. In particular, we discuss how nanoscale complexity controls the emergence of high-temperature superconductivity (HTS), myelin functionality and formation of hybrid organic-inorganic supramolecular assembly. The emergent complex geometries, opening novel venues to quantum technology and to the development of quantum physics of living systems, are discussed.
Collapse
|
18
|
Campi G, Di Gioacchino M, Poccia N, Ricci A, Burghammer M, Ciasca G, Bianconi A. Nanoscale Correlated Disorder in Out-of-Equilibrium Myelin Ultrastructure. ACS NANO 2018; 12:729-739. [PMID: 29281257 DOI: 10.1021/acsnano.7b07897] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Ultrastructural fluctuations at nanoscale are fundamental to assess properties and functionalities of advanced out-of-equilibrium materials. We have taken myelin as a model of supramolecular assembly in out-of-equilibrium living matter. Myelin sheath is a simple stable multilamellar structure of high relevance and impact in biomedicine. Although it is known that myelin has a quasi-crystalline ultrastructure, there is no information on its fluctuations at nanoscale in different states due to limitations of the available standard techniques. To overcome these limitations, we have used scanning micro X-ray diffraction, which is a unique non-invasive probe of both reciprocal and real space to visualize statistical fluctuations of myelin order of the sciatic nerve of Xenopus laevis. The results show that the ultrastructure period of the myelin is stabilized by large anticorrelated fluctuations at nanoscale, between hydrophobic and hydrophilic layers. The ratio between the total thickness of hydrophilic and hydrophobic layers defines the conformational parameter, which describes the different states of myelin. Our key result is that myelin in its out-of-equilibrium functional state fluctuates point-to-point between different conformations showing a correlated disorder described by a Levy distribution. As the system approaches the thermodynamic equilibrium in an aged state, the disorder loses its correlation degree and the structural fluctuation distribution changes to Gaussian. In a denatured state at low pH, it changes to a completely disordered stage. Our results aim to clarify the degradation mechanism in biological systems by associating these states with ultrastructural dynamic fluctuations at nanoscale.
Collapse
Affiliation(s)
- Gaetano Campi
- Institute of Crystallography, CNR , via Salaria, Km 29.300, 00015 Monterotondo Roma, Italy
| | - Michael Di Gioacchino
- Institute of Crystallography, CNR , via Salaria, Km 29.300, 00015 Monterotondo Roma, Italy
- Rome International Center for Materials Science Superstripes (RICMASS) , Via dei Sabelli 119A, 00185 Roma, Italy
- Department of Science, Nanoscience section, Roma Tre University , Via della Vasca Navale 84, 00146 Roma, Italy
| | - Nicola Poccia
- Department of Physics, Harvard University , Cambridge, Massachusetts 02138, United States
| | - Alessandro Ricci
- Rome International Center for Materials Science Superstripes (RICMASS) , Via dei Sabelli 119A, 00185 Roma, Italy
| | - Manfred Burghammer
- European Synchrotron Radiation Facility , 6 Rue Jules Horowitz, BP220, 38043 Grenoble Cedex, France
| | - Gabriele Ciasca
- Physics Institute, Catholic University of Sacred Heart , Largo F. Vito 1, 00168 Rome, Italy
| | - Antonio Bianconi
- Institute of Crystallography, CNR , via Salaria, Km 29.300, 00015 Monterotondo Roma, Italy
- Rome International Center for Materials Science Superstripes (RICMASS) , Via dei Sabelli 119A, 00185 Roma, Italy
- National Research Nuclear University MEPhI (Moscow Engineering Physics Institute) , Kashirskoe shosse 31, 115409 Moscow, Russia
| |
Collapse
|
19
|
Campi G, Cristofaro F, Pani G, Fratini M, Pascucci B, Corsetto PA, Weinhausen B, Cedola A, Rizzo AM, Visai L, Rea G. Heterogeneous and self-organizing mineralization of bone matrix promoted by hydroxyapatite nanoparticles. NANOSCALE 2017; 9:17274-17283. [PMID: 29090300 DOI: 10.1039/c7nr05013e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The mineralization process is crucial to the load-bearing characteristics of the bone extracellular matrix. In this work, we have studied the spatiotemporal dynamics of mineral deposition by human bone marrow mesenchymal stem cells differentiating toward osteoblasts promoted by the presence of exogenous hydroxyapatite nanoparticles. At the molecular level, the added nanoparticles positively modulated the expression of bone-specific markers and enhanced calcified matrix deposition during osteogenic differentiation. The nucleation, growth and spatial arrangement of newly deposited hydroxyapatite nanocrystals have been evaluated using scanning micro X-ray diffraction and scanning micro X-ray fluorescence. As leading results, we have found the emergence of a complex scenario where the spatial organization and temporal evolution of the process exhibit heterogeneous and self-organizing dynamics. At the same time the possibility of controlling the differentiation kinetics, through the addition of synthetic nanoparticles, paves the way to empower the generation of more structured bone scaffolds in tissue engineering and to design new drugs in regenerative medicine.
Collapse
Affiliation(s)
- G Campi
- Institute of Crystallography - CNR, via Salaria Km 29.300, 00015, Monterotondo Roma, Italy.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Correlated Disorder in Myelinated Axons Orientational Geometry and Structure. CONDENSED MATTER 2017. [DOI: 10.3390/condmat2030029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
21
|
Kim D, Lee B, Thomopoulos S, Jun YS. In Situ Evaluation of Calcium Phosphate Nucleation Kinetics and Pathways during Intra- and Extrafibrillar Mineralization of Collagen Matrices. CRYSTAL GROWTH & DESIGN 2016; 16:5359-5366. [PMID: 27891066 PMCID: PMC5120680 DOI: 10.1021/acs.cgd.6b00864] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
We revealed that nucleation sites within collagen fibrils determined pathways for calcium phosphate (CaP) nucleation and its transformation, from amorphous species to crystalline plates, during the biomineralization process. Using in situ small-angle X-ray scattering (SAXS), we examined the nucleation and growth of CaP within collagen matrices and elucidated how a nucleation inhibitor, polyaspartic acid (pAsp), governs mineralization kinetics and pathways at multiple length scales. Mineralization without pAsp led initially to spherical aggregates of CaP in the entire extrafibrillar spaces. With time, the spherical aggregates transformed into plates at the outermost surface of the collagen matrix, preventing intrafibrillar mineralization inside. However, mineralization with pAsp led directly to the formation of intrafibrillar CaP plates with a spatial distribution gradient through the depth of the matrix. The results illuminate mineral nucleation kinetics and real-time nanoparticle distributions within organic matrices in solutions containing body fluid components. Because the macroscale mechanical properties of collagen matrices depend on their mineral content, phase, and arrangement at the nanoscale, this study contributes to better design and fabrication of biomaterials for regenerative medicine.
Collapse
Affiliation(s)
- Doyoon Kim
- Department of Energy, Environmental & Chemical Engineering, Washington University, St. Louis, Missouri 63130, United States
| | - Byeongdu Lee
- X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Stavros Thomopoulos
- Department of Orthopedic Surgery, Columbia University, New York, New York 10032-3072, United States
| | - Young-Shin Jun
- Department of Energy, Environmental & Chemical Engineering, Washington University, St. Louis, Missouri 63130, United States
| |
Collapse
|
22
|
Zhu S, Gu Z, Hu Y, Dan W, Xiong S. Evaluation of alginate dialdehyde as a suitable crosslinker on modifying porcine acellular dermal matrix: The aggregation of collagenous fibers. J Appl Polym Sci 2016. [DOI: 10.1002/app.43550] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shichen Zhu
- College of Food Science and Technology and MOE Key Laboratory of Environment Correlative Dietology; Huazhong Agricultural University; No.1 Shizishan Street, Hongshan District Wuhan Hubei 430070 China
- The Sub Center (Wuhan) of National Technology and R&D of Staple Freshwater Fish Processing; Wuhan 430070 China
| | - Zhipeng Gu
- Department of Biomedical Engineering, School of Engineering; Sun Yat-sen University, Xiaoguwei Island, Panyu District; Guangzhou 510006 China
| | - Yang Hu
- College of Food Science and Technology and MOE Key Laboratory of Environment Correlative Dietology; Huazhong Agricultural University; No.1 Shizishan Street, Hongshan District Wuhan Hubei 430070 China
- The Sub Center (Wuhan) of National Technology and R&D of Staple Freshwater Fish Processing; Wuhan 430070 China
| | - Weihua Dan
- Department of Biomass Chemistry and Engineering; Sichuan University; No.24 South Section 1, Yihuan Road Chengdu Sichuan 610065 China
| | - Shanbai Xiong
- College of Food Science and Technology and MOE Key Laboratory of Environment Correlative Dietology; Huazhong Agricultural University; No.1 Shizishan Street, Hongshan District Wuhan Hubei 430070 China
- The Sub Center (Wuhan) of National Technology and R&D of Staple Freshwater Fish Processing; Wuhan 430070 China
| |
Collapse
|