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Bow AJ, Rifkin RE, Priester C, Christopher CJ, Grzeskowiak RM, Hecht S, Adair SH, Mulon PY, Castro HF, Campagna SR, Anderson DE. Temporal metabolic profiling of bone healing in a caprine tibia segmental defect model. Front Vet Sci 2023; 9:1023650. [PMID: 36733424 PMCID: PMC9886884 DOI: 10.3389/fvets.2022.1023650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Accepted: 12/30/2022] [Indexed: 01/18/2023] Open
Abstract
Bone tissue engineering is an emerging field of regenerative medicine, with a wide array of biomaterial technologies and therapeutics employed. However, it is difficult to objectively compare these various treatments during various stages of tissue response. Metabolomics is rapidly emerging as a powerful analytical tool to establish broad-spectrum metabolic signatures for a target biological system. Developing an effective biomarker panel for bone repair from small molecule data would provide an objective metric to readily assess the efficacy of novel therapeutics in relation to natural healing mechanisms. In this study we utilized a large segmental bone defect in goats to reflect trauma resulting in substantial volumetric bone loss. Characterization of the native repair capacity was then conducted over a period of 12 months through the combination of standard (radiography, computed tomography, histology, biomechanics) data and ultra-high-performance liquid chromatography-high resolution mass spectrometry (UHPLC-HRMS) metabolic profiling. Standard metrics demonstrated that samples formed soft callus structures that later mineralized. Small molecule profiles showed distinct temporal patterns associated with the bone tissue repair process. Specifically, increased lactate and amino acid levels at early time points indicated an environment conducive to osteoblast differentiation and extracellular matrix formation. Citrate and pyruvate abundances increased at later time points indicating increasing mineral content within the defect region. Taurine, shikimate, and pantothenate distribution profiles appeared to represent a shift toward a more homeostatic remodeling environment with the differentiation and activity of osteoclasts offsetting the earlier deposition phases of bone repair. The generation of a comprehensive metabolic reference portfolio offers a potent mechanism for examining novel biomaterials and can serve as guide for the development of new targeted therapeutics to improve the rate, magnitude, and quality of bone regeneration.
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Affiliation(s)
- Austin J. Bow
- Department of Large Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Knoxville, TN, United States,*Correspondence: Austin J. Bow ✉
| | - Rebecca E. Rifkin
- Department of Large Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Knoxville, TN, United States
| | - Caitlin Priester
- Department of Animal Science, University of Tennessee, Knoxville, Knoxville, TN, United States
| | | | - Remigiusz M. Grzeskowiak
- Department of Large Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Knoxville, TN, United States
| | - Silke Hecht
- Department of Small Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Knoxville, TN, United States
| | - Steve H. Adair
- Department of Large Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Knoxville, TN, United States
| | - Pierre-Yves Mulon
- Department of Large Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Knoxville, TN, United States
| | - Hector F. Castro
- Department of Chemistry, University of Tennessee, Knoxville, Knoxville, TN, United States,Biological and Small Molecule Mass Spectrometry Core and the Department of Chemistry, University of Tennessee, Knoxville, Knoxville, TN, United States
| | - Shawn R. Campagna
- Department of Chemistry, University of Tennessee, Knoxville, Knoxville, TN, United States,Biological and Small Molecule Mass Spectrometry Core and the Department of Chemistry, University of Tennessee, Knoxville, Knoxville, TN, United States
| | - David E. Anderson
- University of Tennessee College of Veterinary Medicine, Knoxville, TN, United States,David E. Anderson ✉
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Priester C, MacDonald A, Dhar M, Bow A. Examining the Characteristics and Applications of Mesenchymal, Induced Pluripotent, and Embryonic Stem Cells for Tissue Engineering Approaches across the Germ Layers. Pharmaceuticals (Basel) 2020; 13:E344. [PMID: 33114710 PMCID: PMC7692540 DOI: 10.3390/ph13110344] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 10/15/2020] [Accepted: 10/20/2020] [Indexed: 12/13/2022] Open
Abstract
The field of regenerative medicine utilizes a wide array of technologies and techniques for repairing and restoring function to damaged tissues. Among these, stem cells offer one of the most potent and promising biological tools to facilitate such goals. Implementation of mesenchymal stem cells (MSCs), induced pluripotent stem cells (iPSCs), and embryonic stem cells (ESCs) offer varying advantages based on availability and efficacy in the target tissue. The focus of this review is to discuss characteristics of these three subset stem cell populations and examine their utility in tissue engineering. In particular, the development of therapeutics that utilize cell-based approaches, divided by germinal layer to further assess research targeting specific tissues of the mesoderm, ectoderm, and endoderm. The combinatorial application of MSCs, iPSCs, and ESCs with natural and synthetic scaffold technologies can enhance the reparative capacity and survival of implanted cells. Continued efforts to generate more standardized approaches for these cells may provide improved study-to-study variations on implementation, thereby increasing the clinical translatability of cell-based therapeutics. Coupling clinically translatable research with commercially oriented methods offers the potential to drastically advance medical treatments for multiple diseases and injuries, improving the quality of life for many individuals.
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Affiliation(s)
- Caitlin Priester
- Department of Animal Science, University of Tennessee, Knoxville, TN 37998, USA;
| | - Amber MacDonald
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee, 2407 River Drive, Knoxville, TN 37996, USA; (A.M.); (M.D.)
| | - Madhu Dhar
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee, 2407 River Drive, Knoxville, TN 37996, USA; (A.M.); (M.D.)
| | - Austin Bow
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee, 2407 River Drive, Knoxville, TN 37996, USA; (A.M.); (M.D.)
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Pathi B, Kinsey ST, Howdeshell ME, Priester C, McNeill RS, Locke BR. The formation and functional consequences of heterogeneous mitochondrial distributions in skeletal muscle. ACTA ACUST UNITED AC 2012; 215:1871-83. [PMID: 22573766 DOI: 10.1242/jeb.067207] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Diffusion plays a prominent role in governing both rates of aerobic metabolic fluxes and mitochondrial organization in muscle fibers. However, there is no mechanism to explain how the non-homogeneous mitochondrial distributions that are prevalent in skeletal muscle arise. We propose that spatially variable degradation with dependence on O(2) concentration, and spatially uniform signals for biogenesis, can account for observed distributions of mitochondria in a diversity of skeletal muscle. We used light and transmission electron microscopy and stereology to examine fiber size, capillarity and mitochondrial distribution in fish red and white muscle, fish white muscle that undergoes extreme hypertrophic growth, and four fiber types in mouse muscle. The observed distributions were compared with those generated using a coupled reaction-diffusion/cellular automata (CA) mathematical model of mitochondrial function. Reaction-diffusion analysis of metabolites such as oxygen, ATP, ADP and PCr involved in energy metabolism and mitochondrial function were considered. Coupled to the reaction-diffusion approach was a CA approach governing mitochondrial life cycles in response to the metabolic state of the fiber. The model results were consistent with the experimental observations and showed higher mitochondrial densities near the capillaries because of the sometimes steep gradients in oxygen. The present study found that selective removal of mitochondria in the presence of low prevailing local oxygen concentrations is likely the primary factor dictating the spatial heterogeneity of mitochondria in a diversity of fibers. The model results also suggest decreased diffusional constraints corresponding to the heterogeneous mitochondrial distribution assessed using the effectiveness factor, defined as the ratio of the reaction rate in the system with finite rates of diffusion to that in the absence of any diffusion limitation. Thus, the non-uniform distribution benefits the muscle fiber by increasing the energy status and increasing sustainable metabolic rates.
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Affiliation(s)
- B Pathi
- Department of Chemical and Biomedical Engineering, Florida State University, FAMU-FSU College of Engineering, Tallahassee, FL 32310, USA
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Abstract
ABSTRACTWe study the elastic strain relaxation in highly strained layers deposited on a [001] substrate induced by coherent 3D islanding. We first calculate the elastic strain distribution within several pyramidal 3D islands with different faces (the observed ones being usually [114] or [014]). For this, we use a valence force field (VFF) description. Our calculation includes interactions between islands, which appear to be a key parameter. We study how the shape of the island modifies the strain relaxation which is proved to vary within the island. Very simple considerations on surface tension indicate why pyramidal islands are the most stable.
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Létoublon A, Favre-Nicolin V, Renevier H, Proietti MG, Monat C, Gendry M, Marty O, Priester C. Strain, size, and composition of InAs quantum sticks embedded in InP determined via grazing incidence x-ray anomalous diffraction. Phys Rev Lett 2004; 92:186101. [PMID: 15169510 DOI: 10.1103/physrevlett.92.186101] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2003] [Indexed: 05/24/2023]
Abstract
We have used x-ray anomalous diffraction to recover the model-independent Fourier transform (x-ray structure factor) of InAs quantum sticklike islands embedded in InP. The average height of the quantum sticks, as deduced from the width of the structure factor profile, is 2.54 nm. The InAs out-of-plane deformation, relative to InP, is 6.1%. Diffraction anomalous fine structure provides evidence of pure InAs quantum sticks. Finite difference method calculations reproduce well the diffraction data, and give the strain along the growth direction. The chemical mixing at interfaces is also analyzed.
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Affiliation(s)
- A Létoublon
- Commissariat à l'Energie Atomique, Département de Recherche Fondamentale sur la Matière Condensée, SP2M/NRS, 17 rue des martyrs, 38054 Grenoble Cedex 9, France
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Grandidier B, Niquet YM, Legrand B, Nys JP, Priester C, Stievenard D, Gerard JM, Thierry-Mieg V. Imaging the wave-function amplitudes in cleaved semiconductor quantum boxes. Phys Rev Lett 2000; 85:1068-1071. [PMID: 10991476 DOI: 10.1103/physrevlett.85.1068] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/1999] [Indexed: 05/23/2023]
Abstract
We have investigated the electronic structure of the conduction band states in InAs quantum boxes embedded in GaAs. Using cross-sectional scanning tunneling microscopy and spectroscopy, we report the direct observation of standing wave patterns in the boxes at room temperature. Electronic structure calculation of similar cleaved boxes allows the identification of the standing waves pattern as the probability density of the ground and first excited states. Their spatial distribution in the (001) plane is significantly affected by the strain relaxation due to the cleavage of the boxes.
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Affiliation(s)
- B Grandidier
- Institut d'Electronique et de Microelectronique du Nord, IEMN, (CNRS, UMR 8520), Departement ISEN, 41 boulevard Vauban, 59046 Lille Cedex, France
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Jusserand B, Richards D, Allan G, Priester C, Etienne B. Spin orientation at semiconductor heterointerfaces. Phys Rev B Condens Matter 1995; 51:4707-4710. [PMID: 9979332 DOI: 10.1103/physrevb.51.4707] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Priester C, Foulon Y, Allan G. Role of localized interface states at type-II heterojunctions. Phys Rev B Condens Matter 1994; 49:2919-2922. [PMID: 10011131 DOI: 10.1103/physrevb.49.2919] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Bertho D, Boiron D, Simon A, Jouanin C, Priester C. Calculation of hydrostatic and uniaxial deformation potentials with a self-consistent tight-binding model for Zn-cation-based II-VI compounds. Phys Rev B Condens Matter 1991; 44:6118-6124. [PMID: 9998472 DOI: 10.1103/physrevb.44.6118] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Foulon Y, Priester C. Confinement and parallel-conduction effective mass in an ultrathin strained quantum-well system. Phys Rev B Condens Matter 1991; 44:5889-5892. [PMID: 9998436 DOI: 10.1103/physrevb.44.5889] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Priester C, Allan G, Lannoo M. Self-consistent band-edge deformation potentials in a tight-binding framework. Phys Rev B Condens Matter 1988; 38:13451-13452. [PMID: 9946336 DOI: 10.1103/physrevb.38.13451] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Priester C, Allan G, Lannoo M. Theoretical calculation of band-edge discontinuities near a strained heterojunction: Application to (In,Ga)As/GaAs. Phys Rev B Condens Matter 1988; 38:9870-9873. [PMID: 9945809 DOI: 10.1103/physrevb.38.9870] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Priester C, Allan G, Lannoo M. Band-edge deformation potentials in a tight-binding framework. Phys Rev B Condens Matter 1988; 37:8519-8522. [PMID: 9944209 DOI: 10.1103/physrevb.37.8519] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Lefebvre I, Lannoo M, Priester C, Allan G, Delerue C. Role of dangling bonds at Schottky barriers and semiconductor heterojunctions. Phys Rev B Condens Matter 1987; 36:1336-1339. [PMID: 9942958 DOI: 10.1103/physrevb.36.1336] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Haussy B, Priester C, Allan G, Lannoo M. Theoretical approach to heterojunction valence-band discontinuities: Case of a common anion. Phys Rev B Condens Matter 1987; 36:1105-1110. [PMID: 9942916 DOI: 10.1103/physrevb.36.1105] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Priester C, Allan G, Lannoo M. Theory of the chemical shift at relaxed (110) surfaces of III-V semiconductor compounds. Phys Rev Lett 1987; 58:1989-1991. [PMID: 10034591 DOI: 10.1103/physrevlett.58.1989] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Priester C, Allan G, Lannoo M. Tight-binding calculation of the band offset at the Ge-GaAs (110) interface using a local charge-neutrality condition. Phys Rev B Condens Matter 1986; 33:7386-7388. [PMID: 9938100 DOI: 10.1103/physrevb.33.7386] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Brum JA, Priester C, Allan G. Electric field dependence of the binding energy of shallow donors in GaAs-Ga1-xAlxAs quantum wells. Phys Rev B Condens Matter 1985; 32:2378-2381. [PMID: 9937311 DOI: 10.1103/physrevb.32.2378] [Citation(s) in RCA: 57] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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