1
|
Chakraborty S, Peak KE, Gleghorn JP, Carroll TJ, Varner VD. Quantifying Spatial Patterns of Tissue Stiffness Within the Embryonic Mouse Kidney. Methods Mol Biol 2024; 2805:171-186. [PMID: 39008182 DOI: 10.1007/978-1-0716-3854-5_12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
Biophysical factors, including changes in mechanical stiffness, have been shown to influence the morphogenesis of developing organs. There is a lack of experimental techniques, however, that can probe the mechanical properties of embryonic tissues-especially those which are not mechanically or optically accessible, such as the visceral organs of the developing mouse embryo. Here, using the embryonic kidney as a model system, we describe a method to use microindentation to quantify tissue-level regional differences in the mechanical properties of an embryonic organ. This technique is generalizable and can be used to quantify patterns of tissue stiffness within other developing organ systems. Going forward, these data will enable new experimental studies of the role of biophysical cues during organogenesis.
Collapse
Affiliation(s)
- Somdutta Chakraborty
- Department of Bioengineering, University of Texas at Dallas, Richardson, TX, USA
| | - Kara E Peak
- Department of Bioengineering, University of Texas at Dallas, Richardson, TX, USA
| | - Jason P Gleghorn
- Department of Biomedical Engineering, University of Delaware, Newark, DE, USA
| | - Thomas J Carroll
- Department of Molecular Biology, UT Southwestern Medical Center, Dallas, TX, USA
- Department of Internal Medicine, Division of Nephrology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Victor D Varner
- Department of Bioengineering, University of Texas at Dallas, Richardson, TX, USA.
- Department of Biomedical Engineering, UT Southwestern Medical Center, Dallas, TX, USA.
| |
Collapse
|
2
|
Lashkarinia SS, Coban G, Banu Siddiqui H, Hwai Yap C, Pekkan K. Embryonic aortic arch material properties obtained by optical coherence tomography-guided micropipette aspiration. J Biomech 2023; 146:111392. [PMID: 36473286 DOI: 10.1016/j.jbiomech.2022.111392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 11/04/2022] [Accepted: 11/16/2022] [Indexed: 11/22/2022]
Abstract
It is challenging to determine the in vivo material properties of a very soft, mesoscale arterial vesselsof size ∼ 80 to 120 μm diameter. This information is essential to understand the early embryonic cardiovascular development featuring rapidly evolving dynamic microstructure. Previous research efforts to describe the properties of the embryonic great vessels are very limited. Our objective is to measure the local material properties of pharyngeal aortic arch tissue of the chick-embryo during the early Hamburger-Hamilton (HH) stages, HH18 and HH24. Integrating the micropipette aspiration technique with optical coherence tomography (OCT) imaging, a clear vision of the aspirated arch geometry is achieved for an inner pipette radius of Rp = 25 μm. The aspiration of this region is performed through a calibrated negatively pressurized micro-pipette. A computational finite element model is developed to model the nonlinear behaviour of the arch structure by considering the geometry-dependent constraints. Numerical estimations of the nonlinear material parameters for aortic arch samples are presented. The exponential material nonlinearity parameter (a) of aortic arch tissue increases statistically significantly from a = 0.068 ± 0.013 at HH18 to a = 0.260 ± 0.014 at HH24 (p = 0.0286). As such, the aspirated tissue length decreases from 53 μm at HH18 to 34 μm at HH24. The calculated NeoHookean shear modulus increases from 51 Pa at HH18 to 93 Pa at HH24 which indicates a statistically significant stiffness increase. These changes are due to the dynamic changes of collagen and elastin content in the media layer of the vessel during development.
Collapse
Affiliation(s)
- S Samaneh Lashkarinia
- Department of Mechanical Engineering, Koc University, Istanbul, Turkey; Department of Bioengineering, Imperial College London, UK
| | - Gursan Coban
- Department of Mechanical Engineering, Istinye University, Turkey
| | | | - Choon Hwai Yap
- Department of Bioengineering, Imperial College London, UK
| | - Kerem Pekkan
- Department of Mechanical Engineering, Koc University, Istanbul, Turkey.
| |
Collapse
|
3
|
Tikenoğulları OZ, Costabal FS, Yao J, Marsden A, Kuhl E. How viscous is the beating heart?: Insights from a computational study. COMPUTATIONAL MECHANICS 2022; 70:565-579. [PMID: 37274842 PMCID: PMC10237084 DOI: 10.1007/s00466-022-02180-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 04/08/2022] [Indexed: 06/07/2023]
Abstract
Understanding tissue rheology is critical to accurately model the human heart. While the elastic properties of cardiac tissue have been extensively studied, its viscous properties remain an issue of ongoing debate. Here we adopt a viscoelastic version of the classical Holzapfel Ogden model to study the viscous timescales of human cardiac tissue. We perform a series of simulations and explore stress-relaxation curves, pressure-volume loops, strain profiles, and ventricular wall strains for varying viscosity parameters. We show that the time window for model calibration strongly influences the parameter identification. Using a four-chamber human heart model, we observe that, during the physiologically relevant time scales of the cardiac cycle, viscous relaxation has a negligible effect on the overall behavior of the heart. While viscosity could have important consequences in pathological conditions with compromised contraction or relaxation properties, we conclude that, for simulations within the physiological range of a human heart beat, we can reasonably approximate the human heart as hyperelastic.
Collapse
Affiliation(s)
- Oğuz Ziya Tikenoğulları
- Department of Mechanical Engineering · Stanford University · Stanford, California, United States
| | - Francisco Sahli Costabal
- Department of Mechanical and Metallurgical Engineering and Institute for Biological and Medical Engineering · Pontificia Universidad Catolica de Chile, Chile
| | - Jiang Yao
- Dassault Systèmes Simulia Corporation · Johnston, Rhode Island, United States
| | - Alison Marsden
- Departments of Pediatrics and Bioengineering · Stanford University · Stanford, California, United States
| | - Ellen Kuhl
- Department of Mechanical Engineering · Stanford University · Stanford, California, United States
| |
Collapse
|
4
|
Liu W, Labus KM, Ahern M, LeBar K, Avazmohammadi R, Puttlitz CM, Wang Z. Strain-Dependent Stress Relaxation Behavior of Healthy Right Ventricular Free Wall. Acta Biomater 2022; 152:290-299. [PMID: 36030049 DOI: 10.1016/j.actbio.2022.08.043] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 07/31/2022] [Accepted: 08/17/2022] [Indexed: 11/01/2022]
Abstract
The increasing evidence of stress-strain hysteresis in large animal or human myocardium calls for extensive characterizations of the passive viscoelastic behavior of the myocardium. Several recent studies have investigated and modeled the viscoelasticity of the left ventricle while the right ventricle (RV) viscoelasticity remains poorly understood. Our goal was to characterize the biaxial viscoelastic behavior of RV free wall (RVFW) using two modeling approaches. We applied both quasi-linear viscoelastic (QLV) and nonlinear viscoelastic (NLV) theories to experimental stress relaxation data from healthy adult ovine. A three-term Prony series relaxation function combined with an Ogden strain energy density function were used in the QLV modeling, while a power-law formulation was adopted in the NLV approach. The ovine RVFW exhibited an anisotropic and strain-dependent viscoelastic behavior relative to anatomical coordinates, and the NLV model showed a higher capacity in predicting strain-dependent stress relaxation than the QLV model. From the QLV fitting, the relaxation term associated with the largest time constant played the dominant role in the overall relaxation behavior at all strains from early to late diastole, whereas the term associated with the smallest time constant was pronounced only at low strains at early diastole. From the NLV fitting, the parameters showed a nonlinear dependence on the strain. Overall, our study characterized the anisotropic, nonlinear viscoelasticity to capture the elastic and viscous resistances of the RVFW during diastole. These findings deepen our understanding of RV myocardium dynamic mechanical properties. STATEMENT OF SIGNIFICANCE: Although significant progress has been made to understand the passive elastic behavior of the right ventricle free wall (RVFW), its viscoelastic behavior remains poorly understood. In this study, we originally applied both quasi-linear viscoelastic (QLV) and nonlinear viscoelastic (NLV) models to published experimental data from healthy ovine RVFW. Our results revealed an anisotropic and strain-dependent viscoelastic behavior of the RVFW. The parameters from the NLV fitting showed nonlinear relationships with the strain, and the NLV model showed a higher capacity in predicting strain-dependent stress relaxation than the QLV model. These findings characterize the anisotropic, nonlinear viscoelasticity of RVFW to fully capture the total (elastic and viscous) resistance that is critical to diastolic function.
Collapse
Affiliation(s)
- Wenqiang Liu
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO, 80523, USA
| | - Kevin M Labus
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, 80523, USA
| | - Matt Ahern
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO, 80523, USA; Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, 80523, USA
| | - Kristen LeBar
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, 80523, USA
| | - Reza Avazmohammadi
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843, USA; J. Mike Walker '66 Department of Mechanical Engineering, Texas A&M University, College Station, TX, 77843, USA; Department of Cardiovascular Sciences, Houston Methodist Academic Institute, Houston, TX, 77030, USA
| | - Christian M Puttlitz
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO, 80523, USA; Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, 80523, USA
| | - Zhijie Wang
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO, 80523, USA; Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, 80523, USA.
| |
Collapse
|
5
|
Siddiqui HB, Dogru S, Lashkarinia SS, Pekkan K. Soft-Tissue Material Properties and Mechanogenetics during Cardiovascular Development. J Cardiovasc Dev Dis 2022; 9:jcdd9020064. [PMID: 35200717 PMCID: PMC8876703 DOI: 10.3390/jcdd9020064] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 01/22/2022] [Accepted: 01/28/2022] [Indexed: 12/17/2022] Open
Abstract
During embryonic development, changes in the cardiovascular microstructure and material properties are essential for an integrated biomechanical understanding. This knowledge also enables realistic predictive computational tools, specifically targeting the formation of congenital heart defects. Material characterization of cardiovascular embryonic tissue at consequent embryonic stages is critical to understand growth, remodeling, and hemodynamic functions. Two biomechanical loading modes, which are wall shear stress and blood pressure, are associated with distinct molecular pathways and govern vascular morphology through microstructural remodeling. Dynamic embryonic tissues have complex signaling networks integrated with mechanical factors such as stress, strain, and stiffness. While the multiscale interplay between the mechanical loading modes and microstructural changes has been studied in animal models, mechanical characterization of early embryonic cardiovascular tissue is challenging due to the miniature sample sizes and active/passive vascular components. Accordingly, this comparative review focuses on the embryonic material characterization of developing cardiovascular systems and attempts to classify it for different species and embryonic timepoints. Key cardiovascular components including the great vessels, ventricles, heart valves, and the umbilical cord arteries are covered. A state-of-the-art review of experimental techniques for embryonic material characterization is provided along with the two novel methods developed to measure the residual and von Mises stress distributions in avian embryonic vessels noninvasively, for the first time in the literature. As attempted in this review, the compilation of embryonic mechanical properties will also contribute to our understanding of the mature cardiovascular system and possibly lead to new microstructural and genetic interventions to correct abnormal development.
Collapse
Affiliation(s)
- Hummaira Banu Siddiqui
- Department of Mechanical Engineering, Koc University, Istanbul 34450, Turkey; (H.B.S.); (S.D.); (S.S.L.)
| | - Sedat Dogru
- Department of Mechanical Engineering, Koc University, Istanbul 34450, Turkey; (H.B.S.); (S.D.); (S.S.L.)
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
| | - Seyedeh Samaneh Lashkarinia
- Department of Mechanical Engineering, Koc University, Istanbul 34450, Turkey; (H.B.S.); (S.D.); (S.S.L.)
- Department of Bioengineering, Imperial College London, London SW7 2BX, UK
| | - Kerem Pekkan
- Department of Mechanical Engineering, Koc University, Istanbul 34450, Turkey; (H.B.S.); (S.D.); (S.S.L.)
- Correspondence: ; Tel.: +90-(533)-356-3595
| |
Collapse
|
6
|
Shewale B, Dubois N. Of form and function: Early cardiac morphogenesis across classical and emerging model systems. Semin Cell Dev Biol 2021; 118:107-118. [PMID: 33994301 PMCID: PMC8434962 DOI: 10.1016/j.semcdb.2021.04.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 04/27/2021] [Accepted: 04/28/2021] [Indexed: 12/31/2022]
Abstract
The heart is the earliest organ to develop during embryogenesis and is remarkable in its ability to function efficiently as it is being sculpted. Cardiac heart defects account for a high burden of childhood developmental disorders with many remaining poorly understood mechanistically. Decades of work across a multitude of model organisms has informed our understanding of early cardiac differentiation and morphogenesis and has simultaneously opened new and unanswered questions. Here we have synthesized current knowledge in the field and reviewed recent developments in the realm of imaging, bioengineering and genetic technology and ex vivo cardiac modeling that may be deployed to generate more holistic models of early cardiac morphogenesis, and by extension, new platforms to study congenital heart defects.
Collapse
Affiliation(s)
- Bhavana Shewale
- Department of Cell, Developmental and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Mindich Child Health and Development Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Nicole Dubois
- Department of Cell, Developmental and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Mindich Child Health and Development Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
| |
Collapse
|
7
|
Siami M, Jahani K, Rezaee M. Identifying the parameters of viscoelastic model for a gel-type material as representative of cardiac muscle in dynamic tests. Proc Inst Mech Eng H 2021; 235:1205-1216. [PMID: 34137313 DOI: 10.1177/09544119211025868] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
In this paper, mechanical parameters of a calf heart muscle are identified and a gel-type material as the representative of the cardiac muscle in dynamic tests is introduced. The motivation of this study is to introduce a replacement material of the heart muscle to use in experimental studies of the leadless pacemaker. A particular test setup is developed to capture the experimental data based on the stress relaxation test method where its outputs are time histories of the force and displacement. The standard linear solid model is used for mathematical modeling of the heart muscle sample and a gel-type material specimen namely α-gel. Five tests with different strain history (13.6%,17.1%,20.6%22.4%and,23.8%) are performed by regarding and disregarding the influence of the initial ramp of the loading. The mechanical parameters of the standard linear solid model were identified with precise curve fitting. Consideration of the initial ramp significantly influences the consequences and they are so close to their experimental counterparts. The identified parameters of the standard linear solid model by regarding the influence of the initial ramp for the gel-type material are within an acceptable range for the viscoelastic properties of the calf heart tissue. These results show that the gel-type material has the potential to represent the cardiac muscle in the leadless pacemaker experimental studies. Dynamic mechanical analysis is used to characterize the dynamic viscoelastic properties for the gel by utilizing the identified parameters with taking into account the initial ramp in the frequency domain. Results show that Storage modulus, Loss modulus, and Loss tangent are strongly frequency-dependent especially at low-frequency around the heartbeat frequency range (0-2 Hz).
Collapse
Affiliation(s)
- Majid Siami
- Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran
| | - Kamal Jahani
- Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran
| | - Mousa Rezaee
- Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran
| |
Collapse
|
8
|
Gendernalik A, Zebhi B, Ahuja N, Garrity D, Bark D. In Vivo Pressurization of the Zebrafish Embryonic Heart as a Tool to Characterize Tissue Properties During Development. Ann Biomed Eng 2020; 49:834-845. [PMID: 32959136 DOI: 10.1007/s10439-020-02619-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 09/10/2020] [Indexed: 12/31/2022]
Abstract
Cardiac morphogenesis requires an intricate orchestration of mechanical stress to sculpt the heart as it transitions from a straight tube to a multichambered adult heart. Mechanical properties are fundamental to this process, involved in a complex interplay with function, morphology, and mechanotransduction. In the current work, we propose a pressurization technique applied to the zebrafish atrium to quantify mechanical properties of the myocardium under passive tension. By further measuring deformation, we obtain a pressure-stretch relationship that is used to identify constitutive models of the zebrafish embryonic cardiac tissue. Two-dimensional results are compared with a three-dimensional finite element analysis based on reconstructed embryonic heart geometry. Through these steps, we found that the myocardium of zebrafish results in a stiffness on the order of 10 kPa immediately after the looping stage of development. This work enables the ability to determine how these properties change under normal and pathological heart development.
Collapse
Affiliation(s)
- Alex Gendernalik
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO, USA
| | - Banafsheh Zebhi
- Department of Mechanical Engineering, Colorado State University, Room 304 Scott Building, 1374 Campus Delivery, Fort Collins, CO, 80523-1374, USA
| | - Neha Ahuja
- Department of Biology, Colorado State University, Fort Collins, CO, USA
| | - Deborah Garrity
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO, USA.,Department of Biology, Colorado State University, Fort Collins, CO, USA
| | - David Bark
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO, USA. .,Department of Mechanical Engineering, Colorado State University, Room 304 Scott Building, 1374 Campus Delivery, Fort Collins, CO, 80523-1374, USA. .,Department of Pediatrics, University of Colorado, Aurora, CO, USA. .,Department of Pediatrics, Washington University in St. Louis, St. Louis, MO, USA.
| |
Collapse
|
9
|
Propp A, Gizzi A, Levrero-Florencio F, Ruiz-Baier R. An orthotropic electro-viscoelastic model for the heart with stress-assisted diffusion. Biomech Model Mechanobiol 2020; 19:633-659. [PMID: 31630280 PMCID: PMC7105452 DOI: 10.1007/s10237-019-01237-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 10/09/2019] [Indexed: 12/21/2022]
Abstract
We propose and analyse the properties of a new class of models for the electromechanics of cardiac tissue. The set of governing equations consists of nonlinear elasticity using a viscoelastic and orthotropic exponential constitutive law, for both active stress and active strain formulations of active mechanics, coupled with a four-variable phenomenological model for human cardiac cell electrophysiology, which produces an accurate description of the action potential. The conductivities in the model of electric propagation are modified according to stress, inducing an additional degree of nonlinearity and anisotropy in the coupling mechanisms, and the activation model assumes a simplified stretch-calcium interaction generating active tension or active strain. The influence of the new terms in the electromechanical model is evaluated through a sensitivity analysis, and we provide numerical validation through a set of computational tests using a novel mixed-primal finite element scheme.
Collapse
Affiliation(s)
- Adrienne Propp
- Mathematical Institute, University of Oxford, A. Wiles Building, Woodstock Road, Oxford, OX2 6GG United Kingdom
| | - Alessio Gizzi
- Nonlinear Physics and Mathematical Modeling Laboratory, Department of Engineering, University Campus Bio-Medico, Rome, Italy
| | | | - Ricardo Ruiz-Baier
- Mathematical Institute, University of Oxford, A. Wiles Building, Woodstock Road, Oxford, OX2 6GG United Kingdom
- Laboratory of Mathematical Modelling, Institute of Personalised Medicine, Sechenov University, Moscow, Russian Federation
| |
Collapse
|
10
|
Mandrycky CJ, Williams NP, Batalov I, El-Nachef D, de Bakker BS, Davis J, Kim DH, DeForest CA, Zheng Y, Stevens KR, Sniadecki NJ. Engineering Heart Morphogenesis. Trends Biotechnol 2020; 38:835-845. [PMID: 32673587 DOI: 10.1016/j.tibtech.2020.01.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 01/21/2020] [Accepted: 01/23/2020] [Indexed: 12/22/2022]
Abstract
Recent advances in stem cell biology and tissue engineering have laid the groundwork for building complex tissues in a dish. We propose that these technologies are ready for a new challenge: recapitulating cardiac morphogenesis in vitro. In development, the heart transforms from a simple linear tube to a four-chambered organ through a complex process called looping. Here, we re-examine heart tube looping through the lens of an engineer and argue that the linear heart tube is an advantageous starting point for tissue engineering. We summarize the structures, signaling pathways, and stresses in the looping heart, and evaluate approaches that could be used to build a linear heart tube and guide it through the process of looping.
Collapse
Affiliation(s)
- Christian J Mandrycky
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA; Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - Nisa P Williams
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA; Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - Ivan Batalov
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA; Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - Danny El-Nachef
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA; Department of Pathology, University of Washington, Seattle, WA, USA
| | - Bernadette S de Bakker
- Clinical Anatomy and Embryology, Department of Medical Biology, AMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Jennifer Davis
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA; Department of Bioengineering, University of Washington, Seattle, WA, USA; Department of Pathology, University of Washington, Seattle, WA, USA
| | - Deok-Ho Kim
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA; Department of Bioengineering, University of Washington, Seattle, WA, USA; Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD 21205, USA; Department of Medicine/Cardiology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Cole A DeForest
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA; Department of Bioengineering, University of Washington, Seattle, WA, USA; Department of Chemical Engineering, University of Washington, Seattle, WA, USA
| | - Ying Zheng
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA; Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - Kelly R Stevens
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA; Department of Bioengineering, University of Washington, Seattle, WA, USA; Department of Pathology, University of Washington, Seattle, WA, USA
| | - Nathan J Sniadecki
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA; Department of Bioengineering, University of Washington, Seattle, WA, USA; Department of Mechanical Engineering, University of Washington, Seattle, WA, USA.
| |
Collapse
|
11
|
Marrese M, Antonovaite N, Nelemans BK, Smit TH, Iannuzzi D. Micro-indentation and optical coherence tomography for the mechanical characterization of embryos: Experimental setup and measurements on chicken embryos. Acta Biomater 2019; 97:524-534. [PMID: 31377425 DOI: 10.1016/j.actbio.2019.07.056] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 07/29/2019] [Accepted: 07/30/2019] [Indexed: 10/26/2022]
Abstract
The investigation of the mechanical properties of embryos is expected to provide valuable information on the phenomenology of morphogenesis. It is thus believed that, by mapping the viscoelastic features of an embryo at different stages of growth, it may be possible to shed light on the role of mechanics in embryonic development. To contribute to this field, we present a new instrument that can determine spatiotemporal distributions of mechanical properties of embryos over a wide area and with unprecedented accuracy. The method relies on combining ferrule-top micro-indentation, which provides local measurements of viscoelasticity, with Optical Coherence Tomography, which can reveal changes in tissue morphology and help the user identify the indentation point. To prove the working principle, we have collected viscoelasticity maps of fixed and live HH11-HH12 chicken embryos. Our study shows that the instrument can reveal correlations between tissue morphology and mechanical behavior. STATEMENT OF SIGNIFICANCE: Local mechanical properties of soft biological tissue play a crucial role in several biological processes, including cell differentiation, cell migration, and body formation; therefore, measuring tissue properties at high resolution is of great interest in biology and tissue engineering. To provide an efficient method for the biomechanical characterization of soft biological tissues, we introduce a new tool in which the combination of non-invasive Optical Coherence Tomography imaging and depth-controlled indentation measurements allows one to map the viscoelastic properties of biological tissue and investigate correlations between local mechanical features and tissue morphology with unprecedented resolution.
Collapse
|
12
|
Schroer A, Pardon G, Castillo E, Blair C, Pruitt B. Engineering hiPSC cardiomyocyte in vitro model systems for functional and structural assessment. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2019; 144:3-15. [PMID: 30579630 PMCID: PMC6919215 DOI: 10.1016/j.pbiomolbio.2018.12.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Revised: 09/24/2018] [Accepted: 12/04/2018] [Indexed: 02/06/2023]
Abstract
The study of human cardiomyopathies and the development and testing of new therapies has long been limited by the availability of appropriate in vitro model systems. Cardiomyocytes are highly specialized cells whose internal structure and contractile function are sensitive to the local microenvironment and the combination of mechanical and biochemical cues they receive. The complementary technologies of human induced pluripotent stem cell (hiPSC) derived cardiomyocytes (CMs) and microphysiological systems (MPS) allow for precise control of the genetics and microenvironment of human cells in in vitro contexts. These combined systems also enable quantitative measurement of mechanical function and intracellular organization. This review describes relevant factors in the myocardium microenvironment that affect CM structure and mechanical function and demonstrates the application of several engineered microphysiological systems for studying development, disease, and drug discovery.
Collapse
Affiliation(s)
- Alison Schroer
- Departments of Mechanical Engineering and Bioengineering, Stanford University, Stanford, CA, 94305, USA.
| | - Gaspard Pardon
- Departments of Mechanical Engineering and Bioengineering, Stanford University, Stanford, CA, 94305, USA
| | - Erica Castillo
- Departments of Mechanical Engineering and Bioengineering, Stanford University, Stanford, CA, 94305, USA; Department of Mechanical Engineering, University of California at Santa Barbara, USA
| | - Cheavar Blair
- Departments of Mechanical Engineering and Bioengineering, Stanford University, Stanford, CA, 94305, USA; Department of Mechanical Engineering, University of California at Santa Barbara, USA
| | - Beth Pruitt
- Departments of Mechanical Engineering and Bioengineering, Stanford University, Stanford, CA, 94305, USA; Department of Mechanical Engineering, University of California at Santa Barbara, USA
| |
Collapse
|
13
|
Fassina L, Rozzi G, Rossi S, Scacchi S, Galetti M, Lo Muzio FP, Del Bianco F, Colli Franzone P, Petrilli G, Faggian G, Miragoli M. Cardiac kinematic parameters computed from video of in situ beating heart. Sci Rep 2017; 7:46143. [PMID: 28397830 PMCID: PMC5387404 DOI: 10.1038/srep46143,10.1038/srep46143] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 03/13/2017] [Indexed: 04/01/2024] Open
Abstract
Mechanical function of the heart during open-chest cardiac surgery is exclusively monitored by echocardiographic techniques. However, little is known about local kinematics, particularly for the reperfused regions after ischemic events. We report a novel imaging modality, which extracts local and global kinematic parameters from videos of in situ beating hearts, displaying live video cardiograms of the contraction events. A custom algorithm tracked the movement of a video marker positioned ad hoc onto a selected area and analyzed, during the entire recording, the contraction trajectory, displacement, velocity, acceleration, kinetic energy and force. Moreover, global epicardial velocity and vorticity were analyzed by means of Particle Image Velocimetry tool. We validated our new technique by i) computational modeling of cardiac ischemia, ii) video recordings of ischemic/reperfused rat hearts, iii) videos of beating human hearts before and after coronary artery bypass graft, and iv) local Frank-Starling effect. In rats, we observed a decrement of kinematic parameters during acute ischemia and a significant increment in the same region after reperfusion. We detected similar behavior in operated patients. This modality adds important functional values on cardiac outcomes and supports the intervention in a contact-free and non-invasive mode. Moreover, it does not require particular operator-dependent skills.
Collapse
Affiliation(s)
- Lorenzo Fassina
- Dipartimento di Ingegneria Industriale e dell’Informazione, Università degli Studi di Pavia, Via Ferrata 1, 27100 Pavia, Italy
- Centre for Health Technologies (C.H.T.), Università degli Studi di Pavia, Via Ferrata 1, 27100 Pavia, Italy
| | - Giacomo Rozzi
- Dipartimento di Medicina e Chirurgia, Università degli Studi di Parma, Via Gramsci 14, 43124 Parma, Italy
- Dipartimento di Cardiochirurgia, Università degli Studi di Verona, Ospedale Borgo Trento, P.le Stefani 1, 37126 Verona, Italy
| | - Stefano Rossi
- Dipartimento di Medicina e Chirurgia, Università degli Studi di Parma, Via Gramsci 14, 43124 Parma, Italy
- CERT, Centro di Eccellenza per la Ricerca Tossicologica, INAIL-exISPESL, Università degli Studi di Parma, Via Gramsci 14, 43124 Parma, Italy
| | - Simone Scacchi
- Dipartimento di Matematica, Università degli Studi di Milano, Via Saldini 50, 20133 Milano, Italy
| | - Maricla Galetti
- CERT, Centro di Eccellenza per la Ricerca Tossicologica, INAIL-exISPESL, Università degli Studi di Parma, Via Gramsci 14, 43124 Parma, Italy
| | - Francesco Paolo Lo Muzio
- Dipartimento di Medicina e Chirurgia, Università degli Studi di Parma, Via Gramsci 14, 43124 Parma, Italy
| | - Fabrizio Del Bianco
- Dipartimento di Ingegneria Industriale e dell’Informazione, Università degli Studi di Pavia, Via Ferrata 1, 27100 Pavia, Italy
- Centre for Health Technologies (C.H.T.), Università degli Studi di Pavia, Via Ferrata 1, 27100 Pavia, Italy
| | - Piero Colli Franzone
- Dipartimento di Matematica, Università degli Studi di Pavia, Via Ferrata 1, 27100 Pavia, Italy
| | - Giuseppe Petrilli
- Dipartimento di Cardiochirurgia, Università degli Studi di Verona, Ospedale Borgo Trento, P.le Stefani 1, 37126 Verona, Italy
| | - Giuseppe Faggian
- Dipartimento di Cardiochirurgia, Università degli Studi di Verona, Ospedale Borgo Trento, P.le Stefani 1, 37126 Verona, Italy
| | - Michele Miragoli
- Dipartimento di Medicina e Chirurgia, Università degli Studi di Parma, Via Gramsci 14, 43124 Parma, Italy
- CERT, Centro di Eccellenza per la Ricerca Tossicologica, INAIL-exISPESL, Università degli Studi di Parma, Via Gramsci 14, 43124 Parma, Italy
- Humanitas Clinical and Research Center, Via Manzoni 56, 20090 Rozzano, Italy
- Institute of Genetic and Biomedical Research, National Research Council, Via Manzoni 56, 20090 Rozzano, Italy
| |
Collapse
|
14
|
Fassina L, Rozzi G, Rossi S, Scacchi S, Galetti M, Lo Muzio FP, Del Bianco F, Colli Franzone P, Petrilli G, Faggian G, Miragoli M. Cardiac kinematic parameters computed from video of in situ beating heart. Sci Rep 2017; 7:46143. [PMID: 28397830 PMCID: PMC5387404 DOI: 10.1038/srep46143] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 03/13/2017] [Indexed: 12/21/2022] Open
Abstract
Mechanical function of the heart during open-chest cardiac surgery is exclusively monitored by echocardiographic techniques. However, little is known about local kinematics, particularly for the reperfused regions after ischemic events. We report a novel imaging modality, which extracts local and global kinematic parameters from videos of in situ beating hearts, displaying live video cardiograms of the contraction events. A custom algorithm tracked the movement of a video marker positioned ad hoc onto a selected area and analyzed, during the entire recording, the contraction trajectory, displacement, velocity, acceleration, kinetic energy and force. Moreover, global epicardial velocity and vorticity were analyzed by means of Particle Image Velocimetry tool. We validated our new technique by i) computational modeling of cardiac ischemia, ii) video recordings of ischemic/reperfused rat hearts, iii) videos of beating human hearts before and after coronary artery bypass graft, and iv) local Frank-Starling effect. In rats, we observed a decrement of kinematic parameters during acute ischemia and a significant increment in the same region after reperfusion. We detected similar behavior in operated patients. This modality adds important functional values on cardiac outcomes and supports the intervention in a contact-free and non-invasive mode. Moreover, it does not require particular operator-dependent skills.
Collapse
Affiliation(s)
- Lorenzo Fassina
- Dipartimento di Ingegneria Industriale e dell'Informazione, Università degli Studi di Pavia, Via Ferrata 1, 27100 Pavia, Italy.,Centre for Health Technologies (C.H.T.), Università degli Studi di Pavia, Via Ferrata 1, 27100 Pavia, Italy
| | - Giacomo Rozzi
- Dipartimento di Medicina e Chirurgia, Università degli Studi di Parma, Via Gramsci 14, 43124 Parma, Italy.,Dipartimento di Cardiochirurgia, Università degli Studi di Verona, Ospedale Borgo Trento, P.le Stefani 1, 37126 Verona, Italy
| | - Stefano Rossi
- Dipartimento di Medicina e Chirurgia, Università degli Studi di Parma, Via Gramsci 14, 43124 Parma, Italy.,CERT, Centro di Eccellenza per la Ricerca Tossicologica, INAIL-exISPESL, Università degli Studi di Parma, Via Gramsci 14, 43124 Parma, Italy
| | - Simone Scacchi
- Dipartimento di Matematica, Università degli Studi di Milano, Via Saldini 50, 20133 Milano, Italy
| | - Maricla Galetti
- CERT, Centro di Eccellenza per la Ricerca Tossicologica, INAIL-exISPESL, Università degli Studi di Parma, Via Gramsci 14, 43124 Parma, Italy
| | - Francesco Paolo Lo Muzio
- Dipartimento di Medicina e Chirurgia, Università degli Studi di Parma, Via Gramsci 14, 43124 Parma, Italy
| | - Fabrizio Del Bianco
- Dipartimento di Ingegneria Industriale e dell'Informazione, Università degli Studi di Pavia, Via Ferrata 1, 27100 Pavia, Italy.,Centre for Health Technologies (C.H.T.), Università degli Studi di Pavia, Via Ferrata 1, 27100 Pavia, Italy
| | - Piero Colli Franzone
- Dipartimento di Matematica, Università degli Studi di Pavia, Via Ferrata 1, 27100 Pavia, Italy
| | - Giuseppe Petrilli
- Dipartimento di Cardiochirurgia, Università degli Studi di Verona, Ospedale Borgo Trento, P.le Stefani 1, 37126 Verona, Italy
| | - Giuseppe Faggian
- Dipartimento di Cardiochirurgia, Università degli Studi di Verona, Ospedale Borgo Trento, P.le Stefani 1, 37126 Verona, Italy
| | - Michele Miragoli
- Dipartimento di Medicina e Chirurgia, Università degli Studi di Parma, Via Gramsci 14, 43124 Parma, Italy.,CERT, Centro di Eccellenza per la Ricerca Tossicologica, INAIL-exISPESL, Università degli Studi di Parma, Via Gramsci 14, 43124 Parma, Italy.,Humanitas Clinical and Research Center, Via Manzoni 56, 20090 Rozzano, Italy.,Institute of Genetic and Biomedical Research, National Research Council, Via Manzoni 56, 20090 Rozzano, Italy
| |
Collapse
|
15
|
Gültekin O, Sommer G, Holzapfel GA. An orthotropic viscoelastic model for the passive myocardium: continuum basis and numerical treatment. Comput Methods Biomech Biomed Engin 2016; 19:1647-64. [PMID: 27146848 DOI: 10.1080/10255842.2016.1176155] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
This study deals with the viscoelastic constitutive modeling and the respective computational analysis of the human passive myocardium. We start by recapitulating the locally orthotropic inner structure of the human myocardial tissue and model the mechanical response through invariants and structure tensors associated with three orthonormal basis vectors. In accordance with recent experimental findings the ventricular myocardial tissue is assumed to be incompressible, thick-walled, orthotropic and viscoelastic. In particular, one spring element coupled with Maxwell elements in parallel endows the model with viscoelastic features such that four dashpots describe the viscous response due to matrix, fiber, sheet and fiber-sheet fragments. In order to alleviate the numerical obstacles, the strictly incompressible model is altered by decomposing the free-energy function into volumetric-isochoric elastic and isochoric-viscoelastic parts along with the multiplicative split of the deformation gradient which enables the three-field mixed finite element method. The crucial aspect of the viscoelastic formulation is linked to the rate equations of the viscous overstresses resulting from a 3-D analogy of a generalized 1-D Maxwell model. We provide algorithmic updates for second Piola-Kirchhoff stress and elasticity tensors. In the sequel, we address some numerical aspects of the constitutive model by applying it to elastic, cyclic and relaxation test data obtained from biaxial extension and triaxial shear tests whereby we assess the fitting capacity of the model. With the tissue parameters identified, we conduct (elastic and viscoelastic) finite element simulations for an ellipsoidal geometry retrieved from a human specimen.
Collapse
Affiliation(s)
- Osman Gültekin
- Institute of Biomechanics, Graz University of Technology, Graz, Austria
| | - Gerhard Sommer
- Institute of Biomechanics, Graz University of Technology, Graz, Austria
| | | |
Collapse
|
16
|
Measuring the micromechanical properties of embryonic tissues. Methods 2015; 94:120-8. [PMID: 26255132 DOI: 10.1016/j.ymeth.2015.08.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 07/21/2015] [Accepted: 08/04/2015] [Indexed: 01/06/2023] Open
Abstract
Local mechanical properties play an important role in directing embryogenesis, both at the cell (differentiation, migration) and tissue level (force transmission, organ formation, morphogenesis). Measuring them is a challenge as embryonic tissues are small (μm to mm) and soft (0.1-10 kPa). We describe here how glass fiber cantilevers can be fabricated, calibrated and used to apply small forces (0.1-10 μN), measure contractile activity and assess the bulk tensile elasticity of embryonic tissue. We outline how pressure (hydrostatic or osmotic) can be applied to embryonic tissue to quantify stiffness anisotropy. These techniques can be assembled at low cost and with a minimal amount of equipment. We then present a protocol to prepare tissue sections for local elasticity and adhesion measurements using the atomic force microscope (AFM). We compare AFM nanoindentation maps of native and formaldehyde fixed embryonic tissue sections and discuss how the local elastic modulus obtained by AFM compares to that obtained with other bulk measurement methods. We illustrate all of the techniques presented on the specific example of the chick embryonic digestive tract, emphasizing technical issues and common pitfalls. The main purpose of this report is to make these micromechanical measurement techniques accessible to a wide community of biologists and biophysicists.
Collapse
|
17
|
Trubelja A, MacArthur JW, Sarver JJ, Cohen JE, Hung G, Shudo Y, Fairman AS, Patel J, Edwards BB, Damrauer SM, Hiesinger W, Atluri P, Woo YJ. Bioengineered stromal cell-derived factor-1α analogue delivered as an angiogenic therapy significantly restores viscoelastic material properties of infarcted cardiac muscle. J Biomech Eng 2015; 136:1876662. [PMID: 24860865 DOI: 10.1115/1.4027731] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Indexed: 11/08/2022]
Abstract
Ischemic heart disease is a major health problem worldwide, and current therapies fail to address microrevascularization. Previously, our group demonstrated that the sustained release of novel engineered stromal cell-derived factor 1-a analogue (ESA) limits infarct spreading, collagen deposition, improves cardiac function by promoting angiogenesis in the region surrounding the infarct, and restores the tensile properties of infarcted myocardium. In this study, using a well-established rat model of ischemic cardiomyopathy, we describe a novel and innovative method for analyzing the viscoelastic properties of infarcted myocardium. Our results demonstrate that, compared with a saline control group, animals treated with ESA have significantly improved myocardial relaxation rates, while reducing the transition strain, leading to restoration of left ventricular mechanics.
Collapse
|
18
|
Chopra A, Murray ME, Byfield FJ, Mendez MG, Halleluyan R, Restle DJ, Raz-Ben Aroush D, Galie PA, Pogoda K, Bucki R, Marcinkiewicz C, Prestwich GD, Zarembinski TI, Chen CS, Puré E, Kresh JY, Janmey PA. Augmentation of integrin-mediated mechanotransduction by hyaluronic acid. Biomaterials 2014; 35:71-82. [PMID: 24120037 PMCID: PMC3930571 DOI: 10.1016/j.biomaterials.2013.09.066] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Accepted: 09/20/2013] [Indexed: 12/26/2022]
Abstract
Changes in tissue and organ stiffness occur during development and are frequently symptoms of disease. Many cell types respond to the stiffness of substrates and neighboring cells in vitro and most cell types increase adherent area on stiffer substrates that are coated with ligands for integrins or cadherins. In vivo cells engage their extracellular matrix (ECM) by multiple mechanosensitive adhesion complexes and other surface receptors that potentially modify the mechanical signals transduced at the cell/ECM interface. Here we show that hyaluronic acid (also called hyaluronan or HA), a soft polymeric glycosaminoglycan matrix component prominent in embryonic tissue and upregulated during multiple pathologic states, augments or overrides mechanical signaling by some classes of integrins to produce a cellular phenotype otherwise observed only on very rigid substrates. The spread morphology of cells on soft HA-fibronectin coated substrates, characterized by formation of large actin bundles resembling stress fibers and large focal adhesions resembles that of cells on rigid substrates, but is activated by different signals and does not require or cause activation of the transcriptional regulator YAP. The fact that HA production is tightly regulated during development and injury and frequently upregulated in cancers characterized by uncontrolled growth and cell movement suggests that the interaction of signaling between HA receptors and specific integrins might be an important element in mechanical control of development and homeostasis.
Collapse
Affiliation(s)
- Anant Chopra
- Dept. of Cardiothoracic Surgery, Drexel Univ. College of Med, Philadelphia, PA, USA; Dept. of Bioengineering, Univ. of Pennsylvania, Philadelphia, PA, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|