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Navarrete Á, Varela P, López M, García-Herrera CM, Celentano DJ, Krause B. Characterization of the active response of a guinea pig carotid artery. Front Bioeng Biotechnol 2022; 10:924019. [PMID: 36091433 PMCID: PMC9458959 DOI: 10.3389/fbioe.2022.924019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 07/15/2022] [Indexed: 11/13/2022] Open
Abstract
This work presents a characterization of the active response of the carotid artery of guinea pig fetuses through a methodology that encompasses experiments, modeling and numerical simulation. To this end, the isometric contraction test is carried out in ring samples subjected to different levels of KCl concentrations and pre-stretching. Then, a coupled mechanochemical model, aimed at describing the smooth cell behavior and its influence on the passive and active mechanical response of the vascular tissue, is calibrated from the experimental measurements. Due to the complex stress and strain fields developed in the artery, a finite element numerical simulation of the test is performed to fit the model parameters, where those related to the phosphorylation and dephosphorylation activity along with the load-bearing capacity of the myosin cross-bridges are found to be the most predominant when sensitizing the active response. The main strengths of the model are associated with the prediction of the stationary state of the active mechanical response of the tissue through a realistic description of the mechanochemical process carried out at its cellular level.
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Affiliation(s)
- Álvaro Navarrete
- Departamento de Ingeniería Mecánica, Universidad de Santiago de Chile, Santiago, Chile
| | - Pablo Varela
- Departamento de Ingeniería Mecánica, Universidad de Santiago de Chile, Santiago, Chile
| | - Miguel López
- Departamento de Ingeniería Mecánica, Universidad de Santiago de Chile, Santiago, Chile
| | - Claudio M. García-Herrera
- Departamento de Ingeniería Mecánica, Universidad de Santiago de Chile, Santiago, Chile
- *Correspondence: Claudio M. García-Herrera,
| | - Diego J. Celentano
- Departamento de Ingeniería Mecánica y Metalúrgica, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Bernardo Krause
- Instituto de Ciencias de la Salud, Universidad de O’Higgins, Rancagua, Chile
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Fraser D, Nguyen T, Kotelsky A, Lee W, Buckley M, Benoit DSW. Hydrogel Swelling-Mediated Strain Induces Cell Alignment at Dentin Interfaces. ACS Biomater Sci Eng 2022; 8:3568-3575. [PMID: 35793542 PMCID: PMC9364318 DOI: 10.1021/acsbiomaterials.2c00566] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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Cell and tissue alignment
is a defining feature of periodontal
tissues. Therefore, the development of scaffolds that can guide alignment
of periodontal ligament cells (PDLCs) relative to tooth root (dentin)
surfaces is highly relevant for periodontal tissue engineering. To
control PDLC alignment adjacent to the dentin surface, poly(ethylene
glycol) (PEG)-based hydrogels were explored as a highly tunable matrix
for encapsulating cells and directing their activity. Specifically,
a composite system consisting of dentin blocks, PEG hydrogels, and
PDLCs was created to control PDLC alignment through hydrogel swelling.
PDLCs in composites with minimal hydrogel swelling showed random alignment
adjacent to dentin blocks. In direct contrast, the presence of hydrogel
swelling resulted in PDLC alignment perpendicular to the dentin surface,
with the degree and extension of alignment increasing as a function
of swelling. Replicating this phenomenon with different molds, block
materials, and cells, together with predictive modeling, indicated
that PDLC alignment was primarily a biomechanical response to swelling-mediated
strain. Altogether, this study describes a novel method for inducing
cell alignment adjacent to stiff surfaces through applied strain and
provides a model for the study and engineering of periodontal and
other aligned tissues.
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Affiliation(s)
- David Fraser
- Eastman Institute for Oral Health, Department of Periodontology, University of Rochester Medical Center, Rochester, New York 14620, United States.,Translational Biomedical Science, University of Rochester Medical Center, Rochester, New York 14642, United States
| | - Tram Nguyen
- Department of Biomedical Engineering, University of Rochester, Rochester, New York 14627, United States
| | - Alexander Kotelsky
- Department of Biomedical Engineering, University of Rochester, Rochester, New York 14627, United States
| | - Whasil Lee
- Department of Biomedical Engineering, University of Rochester, Rochester, New York 14627, United States.,Department of Pharmacology & Physiology, University of Rochester Medical Center, Rochester, New York 14642, United States.,Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York 14642, United States
| | - Mark Buckley
- Department of Biomedical Engineering, University of Rochester, Rochester, New York 14627, United States.,Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York 14642, United States
| | - Danielle S W Benoit
- Department of Biomedical Engineering, University of Rochester, Rochester, New York 14627, United States.,Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York 14642, United States.,Department of Chemical Engineering, University of Rochester, Rochester, New York 14627, United States.,Materials Science Program, University of Rochester, Rochester, New York 14627, United States
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Atifeh SM, Davey K, Sadeghi H, Darvizeh R, Darvizeh A. Organic and inorganic equivalent models for analysis of red blood cell mechanical behaviour. J Mech Behav Biomed Mater 2021; 124:104868. [PMID: 34624833 DOI: 10.1016/j.jmbbm.2021.104868] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 09/18/2021] [Accepted: 09/26/2021] [Indexed: 10/20/2022]
Abstract
Experimental investigation into the mechanical response of red blood cells is presently impeded with the main impediments being the micro dimensions involved and ethical issues associated with in vivo testing. The widely employed alternative approach of computational modelling suffers from its own inherent limitations being reliant on precise constitutive and boundary information. Moreover, and somewhat critically, numerical computational models themselves are required to be validated by means of experimentation and hence suffer similar impediments. An alternative experimental approach is examined in this paper involving large-scale equivalent models manufactured principally from inorganic, and to lesser extent organic, materials. Although there presently exists no known method providing the means to investigate the mechanical response of red blood cells using scaled models simultaneously having different dimensions and materials, the present paper aims to develop a scaled framework based on the new finite-similitude theory that has appeared in the recent open literature. Computational models are employed to test the effectiveness of the proposed method, which in principle can provide experimental solution methods to a wide range of practical applications including the design of red-blood cell nanorobots and drug delivery systems. By means of experimentally validated numerical experiments under impact loading it is revealed that although exact prediction is not achieved good accuracy can nevertheless be obtained. Furthermore, it is demonstrated how the proposed approach for first time provides a means to relate models at different scales founded on different constitutive equations.
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Affiliation(s)
- Seid Mohammad Atifeh
- Faculty of Mechanical Engineering, University of Guilan, P.O. Box 3756, Rasht, Iran
| | - Keith Davey
- Department of Mechanical, Aerospace and Civil Engineering, The University of Manchester, UK
| | - Hamed Sadeghi
- Faculty of Mechanical Engineering, University of Guilan, P.O. Box 3756, Rasht, Iran
| | - Rooholamin Darvizeh
- Department of Mechanical, Aerospace and Civil Engineering, The University of Manchester, UK.
| | - Abolfazl Darvizeh
- Faculty of Mechanical Engineering, University of Guilan, P.O. Box 3756, Rasht, Iran
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