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Sexton B, Han Y, Dal-Fabbro R, Xu J, Kaigler D, Bottino MC. The role of fibroblast growth factor-2 in modulating the differentiation of periodontal ligament and alveolar bone-derived stem cells. Arch Oral Biol 2024; 165:106027. [PMID: 38870610 DOI: 10.1016/j.archoralbio.2024.106027] [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] [Received: 12/11/2023] [Revised: 06/05/2024] [Accepted: 06/07/2024] [Indexed: 06/15/2024]
Abstract
OBJECTIVE This study examined how range concentrations of Fibroblast Growth Factor-2 (FGF-2) influence the differentiation and activity of human-derived periodontal ligament (hPDLSCs) and alveolar bone-derived stem cells (haBMSCs). DESIGN hPDLSCs and haBMSCs were cultured with varying concentrations of FGF-2 (0, 1, 2.5, 5, 10, 20 ng/mL) and monitored for osteogenic differentiation through alkaline phosphatase (ALP) activity and quantification of gene expression (qRT-PCR) for osteogenesis markers. Additionally, alizarin red staining and a hydroxyproline colorimetric assay evaluated and quantified osteogenic matrix mineralization and collagen deposition. Statistical analyses were performed using one-way ANOVA or two-way ANOVA for multiple comparisons between groups. RESULTS At low FGF-2 concentrations, hPDLSCs differentiated toward an osteogenic lineage, whereas higher concentrations of FGF-2 inhibited osteogenesis and promoted fibroblastic differentiation. The effect of FGF-2 at the lowest concentration tested (1 ng/mL) led to significantly higher ALP activity than osteogenically induced positive controls at early time points and equivalent RUNX2 expression at early and later time points. FGF-2 supplementation of haBMSC cultures was sufficient, at all concentrations, to increase ALP activity at an earlier time point. Mineralization of haBMSC cultures increased significantly within 5-20 ng/mL FGF-2 concentrations under basal growth media conditions (α-minimal essential medium supplemented with 15 % fetal bovine serum and 1 % penicillin/streptomycin). CONCLUSIONS FGF-2 has a dual capacity in promoting osteogenic and fibroblastic differentiation within hPDLSCs contingent upon the dosage and timing of administration, alongside supporting osteogenic differentiation in haBMSCs. These findings underscore the need for precision growth factors dosing when considering the design of biomaterials for periodontal regeneration.
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Affiliation(s)
- Benjamin Sexton
- Department of Biologic and Materials Science, School of Dentistry, University of Michigan, Ann Arbor, MI, United States
| | - Yuanyuan Han
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, United States
| | - Renan Dal-Fabbro
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, United States
| | - Jinping Xu
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, United States
| | - Darnell Kaigler
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, United States; Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI, United States
| | - Marco C Bottino
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, United States; Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI, United States.
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Lim S, Kim C, Jafari S, Park J, Garcia SS, Demer JL. Postmortem Digital Image Correlation and Finite Element Modeling Demonstrate Posterior Scleral Deformations during Optic Nerve Adduction Tethering. Bioengineering (Basel) 2024; 11:452. [PMID: 38790319 PMCID: PMC11117839 DOI: 10.3390/bioengineering11050452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/25/2024] [Accepted: 04/28/2024] [Indexed: 05/26/2024] Open
Abstract
Postmortem human eyes were subjected to optic nerve (ON) traction in adduction and elevated intraocular pressure (IOP) to investigate scleral surface deformations. We incrementally adducted 11 eyes (age 74.1 ± 9.3 years, standard deviation) from 26° to 32° under normal IOP, during imaging of the posterior globe, for analysis by three-dimensional digital image correlation (3D-DIC). In the same eyes, we performed uniaxial tensile testing in multiple regions of the sclera, ON, and ON sheath. Based on individual measurements, we analyzed eye-specific finite element models (FEMs) simulating adduction and IOP loading. Analysis of 3D-DIC showed that the nasal sclera up to 1 mm from the sheath border was significantly compressed during adduction. IOP elevation from 15 to 30 mmHg induced strains less than did adduction. Tensile testing demonstrated ON sheath stiffening above 3.4% strain, which was incorporated in FEMs of adduction tethering that was quantitatively consistent with changes in scleral deformation from 3D-DIC. Simulated IOP elevation to 30 mmHg did not induce scleral surface strains outside the ON sheath. ON tethering in incremental adduction from 26° to 32° compressed the nasal and stretched the temporal sclera adjacent to the ON sheath, more so than IOP elevation. The effect of ON tethering is influenced by strain stiffening of the ON sheath.
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Affiliation(s)
- Seongjin Lim
- Department of Ophthalmology, Stein Eye Institute, Los Angeles, CA 90095, USA; (S.L.); (S.J.); (J.P.); (S.S.G.)
| | - Changzoo Kim
- Department of Ophthalmology, Kosin University, Busan 49267, Republic of Korea;
| | - Somaye Jafari
- Department of Ophthalmology, Stein Eye Institute, Los Angeles, CA 90095, USA; (S.L.); (S.J.); (J.P.); (S.S.G.)
| | - Joseph Park
- Department of Ophthalmology, Stein Eye Institute, Los Angeles, CA 90095, USA; (S.L.); (S.J.); (J.P.); (S.S.G.)
| | - Stephanie S. Garcia
- Department of Ophthalmology, Stein Eye Institute, Los Angeles, CA 90095, USA; (S.L.); (S.J.); (J.P.); (S.S.G.)
| | - Joseph L. Demer
- Department of Ophthalmology, Stein Eye Institute, Los Angeles, CA 90095, USA; (S.L.); (S.J.); (J.P.); (S.S.G.)
- Neuroscience Interdepartmental Program, University of California, Los Angeles, CA 90095, USA
- Department of Neurology, University of California, Los Angeles, CA 90095, USA
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA
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Djalali-Cuevas A, Rettel M, Stein F, Savitski M, Kearns S, Kelly J, Biggs M, Skoufos I, Tzora A, Prassinos N, Diakakis N, Zeugolis DI. Macromolecular crowding in human tenocyte and skin fibroblast cultures: A comparative analysis. Mater Today Bio 2024; 25:100977. [PMID: 38322661 PMCID: PMC10846491 DOI: 10.1016/j.mtbio.2024.100977] [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] [Received: 10/04/2023] [Revised: 12/22/2023] [Accepted: 01/24/2024] [Indexed: 02/08/2024] Open
Abstract
Although human tenocytes and dermal fibroblasts have shown promise in tendon engineering, no tissue engineered medicine has been developed due to the prolonged ex vivo time required to develop an implantable device. Considering that macromolecular crowding has the potential to substantially accelerate the development of functional tissue facsimiles, herein we compared human tenocyte and dermal fibroblast behaviour under standard and macromolecular crowding conditions to inform future studies in tendon engineering. Basic cell function analysis made apparent the innocuousness of macromolecular crowding for both cell types. Gene expression analysis of the without macromolecular crowding groups revealed expression of tendon related molecules in human dermal fibroblasts and tenocytes. Protein electrophoresis and immunocytochemistry analyses showed significantly increased and similar deposition of collagen fibres by macromolecular crowding in the two cell types. Proteomics analysis demonstrated great similarities between human tenocyte and dermal fibroblast cultures, as well as the induction of haemostatic, anti-microbial and tissue-protective proteins by macromolecular crowding in both cell populations. Collectively, these data rationalise the use of either human dermal fibroblasts or tenocytes in combination with macromolecular crowding in tendon engineering.
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Affiliation(s)
- Adrian Djalali-Cuevas
- Laboratory of Animal Science, Nutrition and Biotechnology, School of Agriculture, University of Ioannina, Arta, Greece
- School of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
- Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Charles Institute of Dermatology, Conway Institute of Biomolecular & Biomedical Research and School of Mechanical & Materials Engineering, University College Dublin (UCD), Dublin, Ireland
| | - Mandy Rettel
- Proteomics Core Facility, European Molecular Biology Laboratory (EMBL), Heidelberg, Germany
| | - Frank Stein
- Proteomics Core Facility, European Molecular Biology Laboratory (EMBL), Heidelberg, Germany
| | - Mikhail Savitski
- Proteomics Core Facility, European Molecular Biology Laboratory (EMBL), Heidelberg, Germany
| | | | - Jack Kelly
- Galway University Hospital, Galway, Ireland
| | - Manus Biggs
- Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, University of Galway, Galway, Ireland
| | - Ioannis Skoufos
- Laboratory of Animal Science, Nutrition and Biotechnology, School of Agriculture, University of Ioannina, Arta, Greece
| | - Athina Tzora
- Laboratory of Animal Science, Nutrition and Biotechnology, School of Agriculture, University of Ioannina, Arta, Greece
| | - Nikitas Prassinos
- School of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Nikolaos Diakakis
- School of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Dimitrios I. Zeugolis
- Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Charles Institute of Dermatology, Conway Institute of Biomolecular & Biomedical Research and School of Mechanical & Materials Engineering, University College Dublin (UCD), Dublin, Ireland
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Malhotra R, Gautam D, Mukherjee K, Mukherjee S, Swamy AM, Rai A, Goyal A, Chawla A. Alternating Layers of Morselized Allograft and Injectable Ceramic Bone Graft Substitute in Acetabular Reconstruction: A Novel 'Sandwich' Technique. Arthroplast Today 2023; 22:101150. [PMID: 37358964 PMCID: PMC10285088 DOI: 10.1016/j.artd.2023.101150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 03/09/2023] [Accepted: 04/23/2023] [Indexed: 06/28/2023] Open
Abstract
Background Impaction of morselized allograft is an appealing procedure for addressing the bone defects. However, concerns remain about its suitability for massive defects. We used a novel "sandwich" technique by impacting the morselized allograft in layers with an intervening layer of injectable bone graft substitute for restoring bone defects during acetabular reconstruction in total hip arthroplasties. Methods From August 2015 to June 2017, 17 revisions, 4 rerevisions, and 3 complex primary total hip arthroplasties were operated by this novel technique. Postoperatively, serial X-rays were evaluated at regular intervals. Clinical and functional outcomes were assessed by the Harris hip score. To examine if introducing an injectable bone substitute into allograft stock increased its load-bearing capability, simulated mechanical testing using Synbone samples was conducted in the laboratory. Results The mean Harris hip score significantly improved from 54.6 preoperatively to 86.8 at the latest follow-up. Graft incorporation was seen in all the cases. There was no evidence of component migration or loosening as compared to the X-rays at 3 weeks and 3 months in all the cases. With revision of component as end point, the survivorship was 100% at 82 months. The mechanical testing reported a higher capability of allograft samples when compared to those without bone substitutes. Conclusions Our data confirms that the use of the "sandwich" technique is a reliable option for major acetabular reconstruction. Early weight bearing is a significant value addition, and short-term results confirm good clinical and functional outcome. Longer follow-up is necessary to assess the status of the construct in the long term.
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Affiliation(s)
- Rajesh Malhotra
- Department of Orthopedics, All India Institute of Medical Sciences, New Delhi, Delhi, India
| | | | - Kaushik Mukherjee
- Department of Mechanical Engineering, Indian Institute of Technology, Delhi, New Delhi, India
| | - Sudipto Mukherjee
- Department of Mechanical Engineering, Indian Institute of Technology, Delhi, New Delhi, India
| | - Arun Manjunatha Swamy
- Department of Orthopedics, All India Institute of Medical Sciences, New Delhi, Delhi, India
| | - Alok Rai
- Department of Orthopedics, All India Institute of Medical Sciences, New Delhi, Delhi, India
| | - Ajay Goyal
- Department of Mechanical Engineering, Indian Institute of Technology, Delhi, New Delhi, India
- Institute of Design, Nirma University, Ahmedabad, Gujarat, India
| | - Anoop Chawla
- Department of Mechanical Engineering, Indian Institute of Technology, Delhi, New Delhi, India
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5
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Grilo GA, Cakir SN, Shaver PR, Iyer RP, Whitehead K, McClung JM, Vahdati A, de Castro Brás LE. Collagen matricryptin promotes cardiac function by mediating scar formation. Life Sci 2023; 321:121598. [PMID: 36963720 PMCID: PMC10120348 DOI: 10.1016/j.lfs.2023.121598] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 03/07/2023] [Accepted: 03/15/2023] [Indexed: 03/26/2023]
Abstract
AIMS A peptide mimetic of a collagen-derived matricryptin (p1159) was shown to reduce left ventricular (LV) dilation and fibrosis after 7 days delivery in a mouse model of myocardial infarction (MI). This suggested p1159 long-term treatment post-MI could have beneficial effects and reduce/prevent adverse LV remodeling. This study aimed to test the potential of p1159 to reduce adverse cardiac remodeling in a chronic MI model and to elucidate p1159 mode-of-action. MATERIALS AND METHODS Using a permanent occlusion MI rodent model, animals received p1159 or vehicle solution up to 28 days. We assessed peptide treatment effects on scar composition and structure and on systolic function. To assess peptide effects on scar vascularization, a cohort of mice were injected with Griffonia simplicifolia isolectin-B4. To investigate p1159 mode-of-action, LV fibroblasts from naïve animals were treated with increasing doses of p1159. KEY FINDINGS Matricryptin p1159 significantly improved systolic function post-MI (2-fold greater EF compared to controls) by reducing left ventricular dilation and inducing the formation of a compliant and organized infarct scar, which promoted LV contractility and preserved the structural integrity of the heart. Specifically, infarcted scars from p1159-treated animals displayed collagen fibers aligned parallel to the epicardium, to resist circumferential stretching, with reduced levels of cross-linking, and improved tissue perfusion. In addition, we found that p1159 increases cardiac fibroblast migration by activating RhoA pathways via the membrane receptor integrin α4. SIGNIFICANCE Our data indicate p1159 treatment reduced adverse LV remodeling post-MI by modulating the deposition, arrangement, and perfusion of the fibrotic scar.
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Affiliation(s)
- Gabriel A Grilo
- Department of Physiology, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, United States of America
| | - Sirin N Cakir
- Department of Physiology, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, United States of America
| | - Patti R Shaver
- Department of Physiology, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, United States of America
| | - Rugmani P Iyer
- Department of Physiology, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, United States of America
| | - Kaitlin Whitehead
- Department of Physiology, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, United States of America
| | - Joseph M McClung
- Department of Physiology, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, United States of America; Department of Cardiovascular Sciences, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, United States of America; East Carolina Diabetes and Obesity Institute, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, United States of America
| | - Ali Vahdati
- Department of Engineering, East Carolina University, Greenville, NC 27858, United States of America
| | - Lisandra E de Castro Brás
- Department of Physiology, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, United States of America; Department of Cardiovascular Sciences, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, United States of America.
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Azmi AF, Yahya MAAM, Azhar NA, Ibrahim N, Ghafar NA, Ghani NAA, Nizar MAM, Yunus SSM, Singh TKL, Law JX, Ng SL. In Vitro Cell Proliferation and Migration Properties of Oral Mucosal Fibroblasts: A Comparative Study on the Effects of Cord Blood- and Peripheral Blood-Platelet Lysate. Int J Mol Sci 2023; 24:ijms24065775. [PMID: 36982842 PMCID: PMC10058190 DOI: 10.3390/ijms24065775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 03/07/2023] [Accepted: 03/13/2023] [Indexed: 03/30/2023] Open
Abstract
Cord blood-platelet lysate (CB-PL), containing growth factors such as a platelet-derived growth factor, has a similar efficacy to peripheral blood-platelet lysate (PB-PL) in initiating cell growth and differentiation, which makes it a unique alternative to be implemented into oral ulceration healing. This research study aimed to compare the effectiveness of CB-PL and PB-PL in promoting oral wound closure in vitro. Alamar blue assay was used to determine the optimal concentration of CB-PL and PB-PL in enhancing the proliferation of human oral mucosal fibroblasts (HOMF). The percentage of wound closure was measured using the wound-healing assay for CB-PL and PB-PL at the optimal concentration of 1.25% and 0.3125%, respectively. The gene expressions of cell phenotypic makers (Col. I, Col. III, elastin and fibronectin) were determined via qRT-PCR. The concentrations of PDGF-BB were quantified using ELISA. We found that CB-PL was as effective as PB-PL in promoting wound-healing and both PL were more effective compared to the control (CTRL) group in accelerating the cell migration in the wound-healing assay. The gene expressions of Col. III and fibronectin were significantly higher in PB-PL compared to CB-PL. The PDGF-BB concentration of PB-PL was the highest and it decreased after the wound closed on day 3. Therefore, we concluded that PL from both sources can be a beneficial treatment for wound-healing, but PB-PL showed the most promising wound-healing properties in this study.
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Affiliation(s)
- Arief Faisal Azmi
- Department of Craniofacial Diagnostics and Biosciences, Faculty of Dentistry, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur 50300, Malaysia
| | - Mohammad Amirul Asyraff Mohd Yahya
- Department of Craniofacial Diagnostics and Biosciences, Faculty of Dentistry, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur 50300, Malaysia
| | - Nur Ain Azhar
- Department of Craniofacial Diagnostics and Biosciences, Faculty of Dentistry, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur 50300, Malaysia
| | - Norliwati Ibrahim
- Department of Craniofacial Diagnostics and Biosciences, Faculty of Dentistry, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur 50300, Malaysia
| | - Norzana Abd Ghafar
- Department of Anatomy, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Bandar Tun Razak, Cheras, Kuala Lumpur 56000, Malaysia
| | - Nur Azurah Abdul Ghani
- Department of Obstetrics and Gynaecology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Bandar Tun Razak, Cheras, Kuala Lumpur 56000, Malaysia
| | - Muhammad Aiman Mohd Nizar
- Department of Craniofacial Diagnostics and Biosciences, Faculty of Dentistry, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur 50300, Malaysia
| | - Siti Salmiah Mohd Yunus
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur 50300, Malaysia
| | - Tashveender Kaur Lakhbir Singh
- Department of Craniofacial Diagnostics and Biosciences, Faculty of Dentistry, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur 50300, Malaysia
| | - Jia-Xian Law
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Bandar Tun Razak, Cheras, Kuala Lumpur 56000, Malaysia
| | - Sook-Luan Ng
- Department of Craniofacial Diagnostics and Biosciences, Faculty of Dentistry, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur 50300, Malaysia
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7
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Ji XL, Zhang HH, Han SY. A piecewise constitutive model for collagen fiber tissues. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2022; 33:39. [PMID: 35482256 PMCID: PMC9050773 DOI: 10.1007/s10856-022-06660-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Accepted: 03/31/2022] [Indexed: 06/14/2023]
Abstract
Inspired by Meyers et al. (Science, 2013), a piecewise model is established so as to individually predict both the heel region and the linear region of stress-strain curve. When the piecewise model satisfactorily predicts the experimental data, the constitutive parameters are precisely identified with definite physical significances. Along with this piecewise guideline, a complete constitutive model can be established for the whole stress-strain curve of collagen fiber tissues with the failure region as well. Graphical abstract.
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Affiliation(s)
- X L Ji
- School of Civil Engineering and Architecture, Nanchang Hangkong University, Nanchang, Jiangxi, 330063, PR China
- State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an, Shaanxi, 710049, PR China
| | - H H Zhang
- School of Civil Engineering and Architecture, Nanchang Hangkong University, Nanchang, Jiangxi, 330063, PR China.
| | - S Y Han
- School of Civil Engineering and Architecture, Nanchang Hangkong University, Nanchang, Jiangxi, 330063, PR China
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Souza RBD, Kawahara EI, Farinha-Arcieri LE, Gyuricza IG, Neofiti-Papi B, Miranda-Rodrigues M, Teixeira MBCG, Fernandes GR, Lemes RB, Reinhardt DP, Gouveia CH, Pereira LV. Hyperkyphosis is not dependent on bone mass and quality in the mouse model of Marfan syndrome. Bone 2021; 152:116073. [PMID: 34171513 DOI: 10.1016/j.bone.2021.116073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 06/10/2021] [Accepted: 06/20/2021] [Indexed: 11/24/2022]
Abstract
Marfan syndrome (MFS) is an autosomal dominant disease affecting cardiovascular, ocular and skeletal systems. It is caused by mutations in the fibrillin-1 (FBN1) gene, leading to structural defects of connective tissue and increased activation of TGF-β. Angiotensin II (ang-II) is involved in TGF-β activity and in bone mass regulation. Inhibition of TGF-β signaling by blockage of the ang-II receptor 1 (AT1R) via losartan administration leads to improvement of cardiovascular and pulmonary phenotypes, but has no effect on skeletal phenotype in the haploinsufficient mouse model of MFS mgR, suggesting a distinct mechanism of pathogenesis in the skeletal system. Here we characterized the skeletal phenotypes of the dominant-negative model for MFS mgΔlpn and tested the effect of inhibition of ang-II signaling in improving those phenotypes. As previously shown, heterozygous mice present hyperkyphosis, however we now show that only males also present osteopenia. Inhibition of ang-II production by ramipril minimized the kyphotic deformity, but had no effect on bone microstructure in male mutant animals. Histological analysis revealed increased thickness of the anterior longitudinal ligament (ALL) of the spine in mutant animals (25.8 ± 6.3 vs. 29.7 ± 7.7 μm), coupled with a reduction in type I (164.1 ± 8.7 vs. 139.0 ± 4.4) and increase in type III (86.5 ± 10.2 vs. 140.4 ± 5.6) collagen in the extracellular matrix of this ligament. In addition, we identified in the MFS mice alterations in the erector spinae muscles which presented thinner muscle fibers (1035.0 ± 420.6 vs. 655.6 ± 239.5 μm2) surrounded by increased area of connective tissue (58.17 ± 6.52 vs. 105.0 ± 44.54 μm2). Interestingly, these phenotypes were ameliorated by ramipril treatment. Our results reveal a sex-dependency of bone phenotype in MFS, where females do not present alterations in bone microstructure. More importantly, they indicate that hyperkyphosis is not a result of osteopenia in the MFS mouse model, and suggest that incompetent spine ligaments and muscles are responsible for the development of that phenotype.
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Affiliation(s)
- Rodrigo Barbosa de Souza
- Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP 05508-090, Brazil
| | - Elisa Ito Kawahara
- Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP 05508-090, Brazil
| | - Luis Ernesto Farinha-Arcieri
- Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP 05508-090, Brazil
| | - Isabela Gerdes Gyuricza
- Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP 05508-090, Brazil
| | - Bianca Neofiti-Papi
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP 05508-000, Brazil
| | - Manuela Miranda-Rodrigues
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP 05508-000, Brazil
| | | | - Gustavo Ribeiro Fernandes
- Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP 05508-090, Brazil
| | - Renan Barbosa Lemes
- Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP 05508-090, Brazil
| | - Dieter P Reinhardt
- Faculty of Medicine and Health Sciences and Faculty of Dentistry, McGill University, Montreal, Canada
| | - Cecília Helena Gouveia
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP 05508-000, Brazil
| | - Lygia V Pereira
- Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP 05508-090, Brazil.
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9
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Clark-Patterson GL, Roy S, Desrosiers L, Knoepp LR, Sen A, Miller KS. Role of fibulin-5 insufficiency and prolapse progression on murine vaginal biomechanical function. Sci Rep 2021; 11:20956. [PMID: 34697337 PMCID: PMC8546087 DOI: 10.1038/s41598-021-00351-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 08/31/2021] [Indexed: 02/04/2023] Open
Abstract
The vagina plays a critical role in supporting the pelvic organs and loss of support leads to pelvic organ prolapse. It is unknown what microstructural changes influence prolapse progression nor how decreased elastic fibers contributes to vaginal remodeling and smooth muscle contractility. The objective for this study was to evaluate the effect of fibulin-5 haploinsufficiency, and deficiency with progressive prolapse on the biaxial contractile and biomechanical function of the murine vagina. Vaginas from wildtype (n = 13), haploinsufficient (n = 13), and deficient mice with grade 1 (n = 9) and grade 2 or 3 (n = 9) prolapse were explanted for biaxial contractile and biomechanical testing. Multiaxial histology (n = 3/group) evaluated elastic and collagen fiber microstructure. Western blotting quantified protein expression (n = 6/group). A one-way ANOVA or Kruskal-Wallis test evaluated statistical significance. Pearson's or Spearman's test determined correlations with prolapse grade. Axial contractility decreased with fibulin-5 deficiency and POP (p < 0.001), negatively correlated with prolapse grade (ρ = - 0.80; p < 0.001), and positively correlated with muscularis elastin area fraction (ρ = - 0.78; p = 0.004). Circumferential (ρ = 0.71; p < 0.001) and axial (ρ = 0.69; p < 0.001) vaginal wall stresses positively correlated with prolapse grade. These findings demonstrated that fibulin-5 deficiency and prolapse progression decreased vaginal contractility and increased vaginal wall stress. Future work is needed to better understand the processes that contribute to prolapse progression in order to guide diagnostic, preventative, and treatment strategies.
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Affiliation(s)
| | - Sambit Roy
- Department of Animal Sciences, Reproductive and Developmental Sciences Program, Michigan State University, East Lansing, 48824, USA
| | - Laurephile Desrosiers
- Department of Female Pelvic Medicine and Reconstructive Surgery, University of Queensland Ochsner Clinical School, New Orleans, 70121, USA
| | - Leise R Knoepp
- Department of Female Pelvic Medicine and Reconstructive Surgery, University of Queensland Ochsner Clinical School, New Orleans, 70121, USA
| | - Aritro Sen
- Department of Animal Sciences, Reproductive and Developmental Sciences Program, Michigan State University, East Lansing, 48824, USA
| | - Kristin S Miller
- Department of Biomedical Engineering, Tulane University, New Orleans, 70118, USA.
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10
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Xie WQ, He M, He YQ, Yu DJ, Jin HF, Yu F, Li YS. The effects of posterior cruciate ligament rupture on the biomechanical and histological characteristics of the medial collateral ligament: an animal study. J Orthop Surg Res 2021; 16:330. [PMID: 34020667 PMCID: PMC8139104 DOI: 10.1186/s13018-021-02443-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Accepted: 04/22/2021] [Indexed: 12/23/2022] Open
Abstract
Background To investigate the effect of complete rupture of the posterior cruciate ligament (PCL) on the biomechanics and histology of the medial collateral ligament (MCL). Materials and methods Seventy-two male rabbits were randomly divided into two groups: the ruptured group was treated with complete PCL amputation, while the intact group was only subjected to PCL exposure without amputation. Eighteen rabbits were randomly sacrificed at 8, 16, 24, and 40 weeks after the operation, and their specimens were processed for mechanical tensile testing, nano-indentation experiments, hematoxylin-eosin (HE) staining, and picrosirius-polarization staining. Results There was no significant difference in the length and maximum displacement of the MCL between the ruptured group and the intact group at each time point. The maximum load of the ruptured group was significantly smaller than that of the intact group at 40 W. The elastic modulus and micro-hardness of the ruptured group increased significantly at 24 W and decreased significantly at 40 W. At 16 W and 24 W after PCL rupture, the number of type I collagen fibers and type III collagen fibers in the MCL of the ruptured group was significantly increased compared with that of the intact group. While the type I collagen fibers of the ruptured group were significantly decreased compared with the intact group at 40 W, there was no significant difference in type III collagen fibers between the ruptured group and the intact group. Conclusion PCL rupture has no significant effect on the mechanical and histological properties of MCL in a short period of time under physiological loading, but the histological and mechanical properties of MCL decrease with time.
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Affiliation(s)
- Wen-Qing Xie
- Department of Orthopaedics, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Miao He
- Department of Orthopaedics, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Yu-Qiong He
- Department of Orthopaedics, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Deng-Jie Yu
- Department of Orthopaedics, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Hong-Fu Jin
- Department of Orthopaedics, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Fang Yu
- Department of Orthopaedics, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China. .,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China.
| | - Yu-Sheng Li
- Department of Orthopaedics, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China. .,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China.
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11
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Dopamine receptor D3 agonist (Pramipexole) reduces morphine-induced cardiac fibrosis. Biochem Biophys Res Commun 2020; 529:1080-1085. [PMID: 32819568 DOI: 10.1016/j.bbrc.2020.06.137] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 06/25/2020] [Indexed: 01/30/2023]
Abstract
Morphine is routinely used for pain management in heart failure patients. However, extended morphine exposure associates with major adverse cardiovascular events. Reports link the dopamine receptor D2-family with morphine-induced nociception modulation. This study first assessed whether morphine induces cardiac remodeling in healthy mice, then whether DRD3 agonist (DRD3ag, D2-family member) adjunct therapy prevents morphine-induced cardiac remodeling. Mice received morphine (2 mg/kg/day i. p.) for 7 days (D7) and were either euthanized at D7 or kept 7 more days without morphine (i.e. withdrawal period, D8-D14): G1, morphine; G2, morphine/DRD3ag; G3, morphine + withdrawal; G4, morphine/DRD3ag + withdrawal; G5, morphine + withdrawal/DRD3ag. A separate cohort of animals were used as naïve tissues. We evaluated functional and molecular parameters of cardiac remodeling. Although we did not observe significant differences in systolic function, morphine induced both interstitial fibrosis and cardiomyocyte hypertrophy. Interestingly, DRD3ag abolished these effects. Compared to naïve tissues, collagen 1 increased after withdrawal in G3 and G4 and collagen 3 increased in G1-G4 but at higher levels in G1 and G2. Only G5 did not show collagen differences compared to naïve, suggesting DRD3ag treatment during withdrawal may be beneficial and prevent morphine-induced fibrosis. Smad2/3 phosphorylation increased during withdrawal, indicating a likely upstream pathway for the observed morphine-induced fibrosis. Overall, our data suggest that DRD3ag adjunct therapy decreases morphine-induced adverse cardiac remodeling.
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12
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Paré F, Tardif G, Fahmi H, Ouhaddi Y, Pelletier JP, Martel-Pelletier J. In vivo protective effect of adipsin-deficiency on spontaneous knee osteoarthritis in aging mice. Aging (Albany NY) 2020; 12:2880-2896. [PMID: 32012117 PMCID: PMC7041762 DOI: 10.18632/aging.102784] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 01/18/2020] [Indexed: 12/12/2022]
Abstract
The adipokine adipsin is an emerging mediator of human osteoarthritis (OA) progression. Here, we investigated its in vivo role in the development of spontaneous OA in aging mice. We compared articular knee joint morphology, histology in knee cartilage, synovial membrane, subchondral bone, meniscus, and anterior cruciate ligament (ACL); and chondrogenesis in the ACL from adipsin-deficient (Df-/-) and wild-type (Df+/+) 20-week- and 20-month-old mice. Serum levels of a panel of adipokines, inflammatory factors, and metalloproteases known to be implicated in OA were investigated. Data first revealed that the early manifestation of OA appeared in the ACL of 20-week-old mice, progressing to severe alterations in the 20 month-old wild-type mice. Further results demonstrated that adipsin-deficiency protected the articular tissues from spontaneous OA progression and triggered significantly higher serum levels of the adipokines adiponectin and FGF-21 while lowering levels of the inflammatory factor interleukin 6 (IL-6) in both young and old mice. This work further underlines the clinical relevance of adipsin as a novel therapeutic approach of human OA. Moreover, this study shows the potential beneficial effect of the adipokine FGF-21 against OA, and provides support for this factor to be a new biomarker and/or target of primary OA therapeutic avenues.
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Affiliation(s)
- Frédéric Paré
- Osteoarthritis Research Unit, University of Montreal Hospital Research Centre (CRCHUM), Montréal, Québec, Canada
| | - Ginette Tardif
- Osteoarthritis Research Unit, University of Montreal Hospital Research Centre (CRCHUM), Montréal, Québec, Canada
| | - Hassan Fahmi
- Osteoarthritis Research Unit, University of Montreal Hospital Research Centre (CRCHUM), Montréal, Québec, Canada
| | - Yassine Ouhaddi
- Osteoarthritis Research Unit, University of Montreal Hospital Research Centre (CRCHUM), Montréal, Québec, Canada
| | - Jean-Pierre Pelletier
- Osteoarthritis Research Unit, University of Montreal Hospital Research Centre (CRCHUM), Montréal, Québec, Canada
| | - Johanne Martel-Pelletier
- Osteoarthritis Research Unit, University of Montreal Hospital Research Centre (CRCHUM), Montréal, Québec, Canada
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13
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A constitutive relation for the tissue composed of type-I collagen fibers under uniaxial tension. J Mech Behav Biomed Mater 2019; 97:222-228. [DOI: 10.1016/j.jmbbm.2019.05.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 04/10/2019] [Accepted: 05/17/2019] [Indexed: 02/04/2023]
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14
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Stamenov N, Yordanova P, Dimitrov D, Telbiyska M, Stefanov M. The Epiligament: Structure, Postnatal Development and Role in Ligament Healing. Cureus 2019; 11:e4836. [PMID: 31403021 PMCID: PMC6682335 DOI: 10.7759/cureus.4836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
While much is known about the ligament, the precise morphology and function of the thin layer of connective tissue lining its surface, termed the epiligament, have not been fully studied yet. Herein, we aimed at reviewing the recent findings on the structural and functional significance of the epiligament in both animal models and human tissue. The epiligament is made up of various connective tissue cells such as fibroblasts, fibrocytes, mast cells, and adipocytes and contains a number of neurovascular bundles. Arrangement of collagen fibers in the epiligament is rather chaotic, in multiple directions, which allows for greater mobility and resistance to stress. Differences in the collagen content and types of enzymes of the group of matrix metalloproteinases between the epiligament and the underlying ligament tissue have been reported and are reviewed herein. While the ligament tissue mainly contains collagen type I, the epiligament is also rich in collagen types III and V. As suggested by a number of studies, the epiligament plays a key role in ligament repair as a donor of cells and matrix metalloproteinases, particularly matrix metalloproteinase-2 and 9, which are essential for scar tissue remodeling. In conclusion, future studies will likely reveal additional functional aspects of the epiligament, which may allow scientists to devise more suitable treatment strategies for damaged ligaments in a world where injuries resulting from sports activities or daily routine have long merited their due attention.
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Affiliation(s)
- Nikola Stamenov
- Anatomy, Histology, and Embryology, Medical University of Sofia, Sofia, BGR
| | | | | | | | - Mark Stefanov
- Anatomy, Histology, and Embryology, Medical University of Sofia, Sofia, BGR
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15
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Schmidt EC, Chin M, Aoyama JT, Ganley TJ, Shea KG, Hast MW. Mechanical and Microstructural Properties of Native Pediatric Posterior Cruciate and Collateral Ligaments. Orthop J Sports Med 2019; 7:2325967118824400. [PMID: 30775386 PMCID: PMC6362518 DOI: 10.1177/2325967118824400] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Background: Although anterior cruciate ligament (ACL) tears have received the most
attention, the medial collateral ligament (MCL) is thought to be the most
commonly injured knee ligament overall. The lateral collateral ligament
(LCL) and posterior collateral ligament (PCL) are less frequently
compromised but can be involved in severe multiligament injuries. The
paucity of information on the native properties of these ligaments in the
pediatric population hinders the overall optimization of treatment for these
injuries. Purpose: To characterize the mechanical and microstructural properties of pediatric
MCLs, LCLs, and PCLs using a rare cadaveric cohort (mean age, 9.2
years). Study Design: Descriptive laboratory study. Methods: MCLs, LCLs, and PCLs were harvested from 5 fresh-frozen pediatric knee
specimens (3 male, 2 female) and were subjected to a tensile loading
protocol. A subset of contralateral tissues from a single donor was analyzed
using bright-field, polarized light, and transmission electron microscopy to
measure collagen fiber morphology. Results: The pediatric MCL exhibited values for ultimate stress (11.7 ± 6.7 MPa),
ultimate strain (18.2% ± 6.8%), and the Young modulus (93.7 ± 56.5 MPa) that
were similar to values for the LCL (11.4 ± 11.5 MPa, 27.7% ± 12.9%, and 64.4
± 76.6 MPa, respectively). The PCL demonstrated decreased ultimate stress
(4.2 ± 1.8 MPa), increased ultimate strain (28.8% ± 11.9%), and a decreased
Young modulus (19.8 ± 10.4 MPa) when compared with the MCL and LCL. All 3
ligaments had similar mean crimp wavelengths (MCL, 32.8 ± 3.6 µm; LCL, 27.2
± 3.5 µm; PCL, 25.8 ± 3.5 µm) and collagen fibril diameters (MCL, 88.0 ±
26.0 nm; LCL, 93.3 ± 34.6 nm; PCL, 90.9 ± 34.0 nm); however, the fibril
distribution profiles exhibited different modalities. Conclusion: The pediatric MCL and LCL possessed similar mechanical properties, while the
pediatric PCL was weaker but capable of withstanding higher amounts of
strain. All 3 of these pediatric structures were weaker than what has been
reported in studies with adult cohorts. Clinical Relevance: Results from this study can be considered preliminary mechanical and
microstructural data for healthy pediatric collateral and posterior cruciate
ligaments that can be used to guide further laboratory and clinical
research.
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Affiliation(s)
- Elaine C Schmidt
- Biedermann Laboratory for Orthopaedic Research, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Matthew Chin
- Biedermann Laboratory for Orthopaedic Research, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Julien T Aoyama
- Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Theodore J Ganley
- Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Kevin G Shea
- Department of Orthopaedic Surgery, Stanford University, Stanford, California, USA
| | - Michael W Hast
- Biedermann Laboratory for Orthopaedic Research, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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Schmidt EC, Chin M, Aoyama JT, Ganley TJ, Shea KG, Hast MW. Mechanical and Microstructural Properties of Pediatric Anterior Cruciate Ligaments and Autograft Tendons Used for Reconstruction. Orthop J Sports Med 2019; 7:2325967118821667. [PMID: 30719479 PMCID: PMC6348523 DOI: 10.1177/2325967118821667] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Over the past several decades, there has been a steady increase in pediatric anterior cruciate ligament (ACL) tears, particularly in young female basketball and soccer players. Because allograft tissue for pediatric ACL reconstruction (ACLR) has shown high rates of failure, autograft tissue may be the best option for ACLR in this population. However, differences in the structure and mechanical behavior of these tissues are not clear. PURPOSE To characterize the mechanical and microstructural properties in pediatric ACLs and autograft tissues using a rare cadaveric cohort (mean age, 9.2 years). STUDY DESIGN Descriptive laboratory study. METHODS ACLs, patellar tendons, quadriceps tendons, semitendinosus tendons, and iliotibial bands (ITBs) were harvested from 5 fresh-frozen pediatric knee specimens (3 male, 2 female) and subjected to a tensile loading protocol. A subset of contralateral tissues was analyzed using bright-field, polarized light, and transmission electron microscopy. RESULTS Patellar tendons exhibited values for ultimate stress (5.2 ± 3.1 MPa), ultimate strain (35.3% ± 12.5%), and the Young modulus (27.0 ± 8.8 MPa) that were most similar to the ACLs (5.2 ± 2.2 MPa, 31.4% ± 9.9%, and 23.6 ± 15.5 MPa, respectively). Semitendinosus tendons and ITBs were stronger but less compliant than the quadriceps or patellar tendons. ITBs exhibited crimp wavelengths (27.0 ± 2.9 μm) and collagen fibril diameters (67.5 ± 19.5 nm) that were most similar to the ACLs (24.4 ± 3.2 μm and 65.3 ± 19.9 nm, respectively). CONCLUSION The mechanical properties of the patellar tendon were almost identical to those of the ACL. The ITB exhibited increased strength and a similar microstructure to the native ACL. These findings are not entirely congruent with studies examining adult tissues. CLINICAL RELEVANCE These results can be used to inform further clinical research. In particular, they justify a further examination of the biomechanical and microstructural properties of the ITB in the context of its role as an autograft tissue in pediatric ACL reconstruction.
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Affiliation(s)
- Elaine C. Schmidt
- Biedermann Laboratory for Orthopaedic Research, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Matthew Chin
- Biedermann Laboratory for Orthopaedic Research, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Julien T. Aoyama
- Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | | | - Kevin G. Shea
- Department of Orthopaedic Surgery, Stanford University, Stanford, California, USA
| | - Michael W. Hast
- Biedermann Laboratory for Orthopaedic Research, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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Adıgüzel C, Saygılı Yılmaz ES, Arlıer S, Seyfettinoğlu S, Söker G, Uysal G, Yücel O, Sivaslıoğlu A. The importance of uterosacral ligament anatomy in overactive bladder: A preliminary study. Turk J Obstet Gynecol 2018; 15:65-69. [PMID: 29662719 PMCID: PMC5894539 DOI: 10.4274/tjod.73669] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 02/03/2018] [Indexed: 12/20/2022] Open
Abstract
Objective: To evaluate whether uterosacral ligament (USL) thickness measured using magnetic resonance imaging (MRI) was associated with overactive bladder (OAB) in otherwise healthy women. Materials and Methods: The study comprised 27 women with OAB and 27 healthy women (control group) who were followed up at the Obstetrics and Gynecology Department of a tertiary referral center. All subjects were evaluated using pelvic MRI to determine the transverse USL thickness. These measurements were compared between the two groups. p values less than 0.05 were considered statistically significant. Results: The mean age of women in the OAB and control groups were 43.88±9.36 years and 39.92±5.36 years, respectively. The mean body mass index in the OAB group was 29.77±4.82 kg/m2 and 27.49±3.44 kg/m2 in the control group. In the comparison of Pelvic Organ Prolapse Quantification system stages between the groups, no statistically significant relationship was determined. In the OAB group, the mean right USL thickness was 2.04±0.34 mm, and the mean left USL was 2.04±0.52 mm. In the control group, the mean right USL thickness was 2.17±0.47 mm, and the mean left USL was 2.09±0.51 mm. There were no statistically significant differences in terms of USL thickness between the OAB and control groups (p>0.05). Conclusion: No previous studies have been identified in the literature that have investigated the relationship between USL thicknesses and urinary incontinence. In the present study, no significant relationship could be demonstrated between right and left USL thicknesses of the OAB and control groups. This was a preliminary study, and further research with larger sample sizes is required to reach a final conclusion.
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Affiliation(s)
- Cevdet Adıgüzel
- Adana Numune Training and Research Hospital, Clinic of Obstetrics and Gynecology, Adana, Turkey
| | | | - Sefa Arlıer
- Adana Numune Training and Research Hospital, Clinic of Obstetrics and Gynecology, Adana, Turkey
| | - Sevtap Seyfettinoğlu
- Adana Numune Training and Research Hospital, Clinic of Obstetrics and Gynecology, Adana, Turkey
| | - Gökhan Söker
- Adana Numune Training and Research Hospital, Clinic of Radiology, Adana, Turkey
| | - Gülsüm Uysal
- Adana Numune Training and Research Hospital, Clinic of Obstetrics and Gynecology, Adana, Turkey
| | - Oğuz Yücel
- Adana Numune Training and Research Hospital, Clinic of Obstetrics and Gynecology, Adana, Turkey
| | - Akın Sivaslıoğlu
- Muğla Sıtkı Koçman University Faculty of Medicine, Department of Obstetrics and Gynecology, Muğla, Turkey
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18
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Local distribution of collagen fibers determines crack initiation site and its propagation direction during aortic rupture. Biomech Model Mechanobiol 2017; 17:577-587. [DOI: 10.1007/s10237-017-0979-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 10/31/2017] [Indexed: 12/29/2022]
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19
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Sugita S, Matsumoto T. Multiphoton microscopy observations of 3D elastin and collagen fiber microstructure changes during pressurization in aortic media. Biomech Model Mechanobiol 2016; 16:763-773. [PMID: 27878400 DOI: 10.1007/s10237-016-0851-9] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 10/31/2016] [Indexed: 01/15/2023]
Abstract
Elastin and collagen fibers play important roles in the mechanical properties of aortic media. Because knowledge of local fiber structures is required for detailed analysis of blood vessel wall mechanics, we investigated 3D microstructures of elastin and collagen fibers in thoracic aortas and monitored changes during pressurization. Using multiphoton microscopy, autofluorescence images from elastin and second harmonic generation signals from collagen were acquired in media from rabbit thoracic aortas that were stretched biaxially to restore physiological dimensions. Both elastin and collagen fibers were observed in all longitudinal-circumferential plane images, whereas alternate bright and dark layers were observed along the radial direction and were recognized as elastic laminas (ELs) and smooth muscle-rich layers (SMLs), respectively. Elastin and collagen fibers are mainly oriented in the circumferential direction, and waviness of collagen fibers was significantly higher than that of elastin fibers. Collagen fibers were more undulated in longitudinal than in radial direction, whereas undulation of elastin fibers was equibiaxial. Changes in waviness of collagen fibers during pressurization were then evaluated using 2-dimensional fast Fourier transform in mouse aortas, and indices of waviness of collagen fibers decreased with increases in intraluminal pressure. These indices also showed that collagen fibers in SMLs became straight at lower intraluminal pressures than those in EL, indicating that SMLs stretched more than ELs. These results indicate that deformation of the aorta due to pressurization is complicated because of the heterogeneity of tissue layers and differences in elastic properties of ELs, SMLs, and surrounding collagen and elastin.
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Affiliation(s)
- Shukei Sugita
- Biomechanics Laboratory, Department of Mechanical Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, 466-8555, Japan.
| | - Takeo Matsumoto
- Biomechanics Laboratory, Department of Mechanical Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, 466-8555, Japan.
- Department of Mechanical Science and Engineering, Graduate School of Engineering, Nagoya University, Nagoya, Japan.
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Dragoni M, Farsetti P, Vena G, Bellini D, Maglione P, Ippolito E. Ponseti Treatment of Rigid Residual Deformity in Congenital Clubfoot After Walking Age. J Bone Joint Surg Am 2016; 98:1706-1712. [PMID: 27869621 DOI: 10.2106/jbjs.16.00053] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND There is no established treatment for rigid residual deformity of congenital clubfoot (CCF) after walking age. Soft-tissue procedures, osseous procedures, and external fixation have been performed with unpredictable results. We applied the Ponseti method to patients with this condition in order to improve the outcomes of treatment. METHODS We retrospectively reviewed the cases of 44 patients (68 feet) with congenital clubfoot whose mean age (and standard deviation) at treatment was 4.8 ± 1.6 years. All patients had been previously treated in other institutions by various conservative and surgical protocols. Residual deformity was evaluated using the International Clubfoot Study Group Score (ICFSGS), and stiffness was rated by the number of casts needed for deformity correction. Ponseti manipulation and cast application was performed. Equinus was usually treated with percutaneous heel-cord surgery, while the cavus deformity was treated with percutaneous fasciotomy when needed. Tibialis anterior tendon transfer (TATT) was performed in patients over 3 years old. At the time of follow-up, the results were evaluated using the ICFSGS. RESULTS Before treatment, 12 feet were graded as fair and 56, as poor. Two to 4 casts were applied, with each cast worn for 4 weeks. Stiffness was moderate (2 casts) in 23 feet, severe (3 casts) in 30 feet, and very severe (4 casts) in 15 feet. Percutaneous heel-cord surgery was performed in 28 feet; open posterior release, in 5 feet; plantar fasciotomy, in 30 feet; and TATT, in 60 feet. The mean length of follow-up was 4.9 ± 1.8 years. Eight feet had an excellent result; 49 feet, a good result; and 11 feet, a fair result. No patient had pain. All of the feet showed significant improvement. CONCLUSIONS Ponseti treatment with TATT, which was performed in 88% of the feet, was effective, and satisfactory results were achieved in 84% of the feet. At the time of follow-up, no patient showed an abnormal gait, all feet were plantigrade and flexible, but 2 feet (2.9%) had relapsed. LEVEL OF EVIDENCE Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.
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Affiliation(s)
- Massimiliano Dragoni
- Departments of Clinical Science and Translational Medicine (M.D. and G.V.) and Orthopaedics and Traumatology (P.F., D.B., and E.I.), University of Rome "Tor Vergata," Rome, Italy
| | - Pasquale Farsetti
- Departments of Clinical Science and Translational Medicine (M.D. and G.V.) and Orthopaedics and Traumatology (P.F., D.B., and E.I.), University of Rome "Tor Vergata," Rome, Italy
| | - Giuseppe Vena
- Departments of Clinical Science and Translational Medicine (M.D. and G.V.) and Orthopaedics and Traumatology (P.F., D.B., and E.I.), University of Rome "Tor Vergata," Rome, Italy
| | - Diego Bellini
- Departments of Clinical Science and Translational Medicine (M.D. and G.V.) and Orthopaedics and Traumatology (P.F., D.B., and E.I.), University of Rome "Tor Vergata," Rome, Italy
| | - Pierluigi Maglione
- Orthopaedic Unit, Department of Surgery and Transplant Center, Bambino Gesù Children's Hospital, Fiumicino, Italy
| | - Ernesto Ippolito
- Departments of Clinical Science and Translational Medicine (M.D. and G.V.) and Orthopaedics and Traumatology (P.F., D.B., and E.I.), University of Rome "Tor Vergata," Rome, Italy
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21
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Wan C, Hao Z, Wen S. The effect of healing in the medial collateral ligament of human knee joint: A three-dimensional finite element analysis. Proc Inst Mech Eng H 2016; 230:867-875. [DOI: 10.1177/0954411916656662] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The medial collateral ligament (MCL) is one of the main ligaments that provide knee joint with major restraints against valgus, internal, and external torque loads. The MCL injury most frequently occurs near its femoral attachment but can be healed spontaneously. Hence, the usual clinical treatment for MCL injury is conservative therapy with early controlled rehabilitation motion. However, the effect of the variations in the healing conditions of the MCL portion (i.e. near the femoral insertion) is still unclear. In this study, finite element tibiofemoral joint models with three different MCL healing conditions were analyzed under six kinds of joint loads, such as 10 and 20 N·m valgus tibial torques, 5 and 10 N·m internal tibial torques, and 5 and 10 N·m external tibial torques. The three healing conditions corresponded to the early, medium, and final (i.e. healthy) stages of the healing period, respectively. It was found that different MCL healing conditions greatly affected the main joint kinematics under valgus tibial torques, but neither the reaction force nor stress results of the MCL. The peak strain values in the MCL healing portion changed greatly under all the six loads. Moreover, all the joint kinematics, strain results, and reaction force of the MCL at the medium stage were similar to those in the healthy joint, that is, at the final healing stage. These imply that the partially healed MCL might be enough for providing the restraints for knee joints and would not lead to some high strains occurring in the MCL.
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Affiliation(s)
- Chao Wan
- Institute of Biomechanics and Medical Engineering, Department of Engineering Mechanics, Tsinghua University, Beijing, China
- State Key Laboratory of Tribology, Tsinghua University, Beijing, China
| | - Zhixiu Hao
- State Key Laboratory of Tribology, Tsinghua University, Beijing, China
| | - Shizhu Wen
- State Key Laboratory of Tribology, Tsinghua University, Beijing, China
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Lindsey ML, Iyer RP, Zamilpa R, Yabluchanskiy A, DeLeon-Pennell KY, Hall ME, Kaplan A, Zouein FA, Bratton D, Flynn ER, Cannon PL, Tian Y, Jin YF, Lange RA, Tokmina-Roszyk D, Fields GB, de Castro Brás LE. A Novel Collagen Matricryptin Reduces Left Ventricular Dilation Post-Myocardial Infarction by Promoting Scar Formation and Angiogenesis. J Am Coll Cardiol 2016; 66:1364-74. [PMID: 26383724 DOI: 10.1016/j.jacc.2015.07.035] [Citation(s) in RCA: 106] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 06/24/2015] [Accepted: 07/14/2015] [Indexed: 12/15/2022]
Abstract
BACKGROUND Proteolytically released extracellular matrix (ECM) fragments, matricryptins, are biologically active and play important roles in wound healing. Following myocardial infarction (MI), collagen I, a major component of cardiac ECM, is cleaved by matrix metalloproteinases (MMPs). OBJECTIVES This study identified novel collagen-derived matricryptins generated post-MI that mediate remodeling of the left ventricle (LV). METHODS Recombinant collagen Ia1 was used in MMPs cleavage assays, the products were analyzed by mass spectrometry for identification of cleavage sites. C57BL6/J mice were given MI and animals were treated either with vehicle control or p1158/59 matricryptin. Seven days post-MI, LV function and parameters of LV remodeling were measured. Levels of p1158/59 were also measured in plasma of MI patients and healthy controls. RESULTS In situ, MMP-2 and -9 generate a collagen Iα1 C-1158/59 fragment, and MMP-9 can further degrade it. The C-1158/59 fragment was identified post-MI, both in human plasma and mouse LV, at levels that inversely correlated to MMP-9 levels. We synthesized a peptide beginning at the cleavage site (p1158/59, amino acids 1159 to 1173) to investigate its biological functions. In vitro, p1158/59 stimulated fibroblast wound healing and robustly promoted angiogenesis. In vivo, early post-MI treatment with p1158/59 reduced LV dilation at day 7 post-MI by preserving LV structure (p < 0.05 vs. control). The p1158/59 stimulated both in vitro and in vivo wound healing by enhancing basement membrane proteins, granulation tissue components, and angiogenic factors. CONCLUSIONS Collagen Iα1 matricryptin p1158/59 facilitates LV remodeling post-MI by regulating scar formation through targeted ECM generation and stimulation of angiogenesis.
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Affiliation(s)
- Merry L Lindsey
- Mississippi Center for Heart Research, Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi; San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center, San Antonio, Texas; Research Service, G.V. (Sonny) Montgomery Veterans Affairs Medical Center, Jackson, Mississippi
| | - Rugmani Padmanabhan Iyer
- Mississippi Center for Heart Research, Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi; San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center, San Antonio, Texas
| | - Rogelio Zamilpa
- San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center, San Antonio, Texas
| | - Andriy Yabluchanskiy
- Mississippi Center for Heart Research, Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi; San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center, San Antonio, Texas
| | - Kristine Y DeLeon-Pennell
- Mississippi Center for Heart Research, Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi; San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center, San Antonio, Texas
| | - Michael E Hall
- Division of Cardiology and Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi
| | - Abdullah Kaplan
- Mississippi Center for Heart Research, Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi; San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center, San Antonio, Texas
| | - Fouad A Zouein
- Mississippi Center for Heart Research, Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi; San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center, San Antonio, Texas
| | - Dustin Bratton
- Mississippi Center for Heart Research, Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi; San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center, San Antonio, Texas
| | - Elizabeth R Flynn
- Mississippi Center for Heart Research, Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi; San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center, San Antonio, Texas
| | - Presley L Cannon
- Mississippi Center for Heart Research, Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi; San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center, San Antonio, Texas
| | - Yuan Tian
- Mississippi Center for Heart Research, Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi; San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center, San Antonio, Texas
| | - Yu-Fang Jin
- San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center, San Antonio, Texas; Department of Electrical and Computer Engineering, University of Texas at San Antonio, San Antonio, Texas
| | - Richard A Lange
- San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center, San Antonio, Texas; Paul L. Foster School of Medicine, Texas Tech University Health Science Center, El Paso, Texas
| | - Dorota Tokmina-Roszyk
- San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center, San Antonio, Texas; Florida Atlantic University, Department of Chemistry and Biochemistry, Jupiter, Florida
| | - Gregg B Fields
- San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center, San Antonio, Texas; Florida Atlantic University, Department of Chemistry and Biochemistry, Jupiter, Florida
| | - Lisandra E de Castro Brás
- Mississippi Center for Heart Research, Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi; San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center, San Antonio, Texas; Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, North Carolina.
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23
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Wan C, Hao Z, Tong L, Lin J, Li Z, Wen S. An update on the constitutive relation of ligament tissues with the effects of collagen types. J Mech Behav Biomed Mater 2015; 50:255-67. [DOI: 10.1016/j.jmbbm.2015.06.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 06/01/2015] [Accepted: 06/15/2015] [Indexed: 12/26/2022]
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