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de Guzman RC, Meer AS, Mathews AA, Israel AR, Moses MT, Sams CM, Deegan DB. Reduced fibrous capsule elastic fibers from biologic ECM-enveloped CIEDs in minipigs, supported with a novel compression mechanics model. Biomed Mater Eng 2022:BME221488. [PMID: 36617774 DOI: 10.3233/bme-221488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND Fibrous capsules (Fb) in response to cardiovascular implantable electronic devices (CIEDs), including a pacemaker (P) system, can produce patient discomfort and difficulties in revision surgery due partially to their increased compressive strength, previously linked to elevated tissue fibers. OBJECTIVE A preliminary study to quantify structural proteins, determine if biologic extracellular matrix-enveloped CIEDs (PECM) caused differential Fb properties, and to implement a realistic mechanical model. METHODS Retrieved Fb (-P and -PECM) from minipigs were subjected to biomechanical (shear oscillation and uniaxial compression) and histological (collagen I and elastin) analyses. RESULTS Fb-PECM showed significant decreases compared to Fb-P in: low strain-loss modulus (390 vs. 541 Pa) across angular frequencies, high strain-compressive elastic modulus (1043 vs. 2042 kPa), and elastic fiber content (1.92 vs. 3.15 μg/mg tissue). Decreases in elastin were particularly noted closer to the implant's surface (Fb-PECM = 71% vs. Fb-P = 143% relative to dermal elastin at mid-tangential sections) and verified with a solid mechanics hyperelasticity with direction-dependent fiber viscoelasticity compression simulation (r2 ≥ 98.9%). CONCLUSIONS The biologic envelope composed of decellularized porcine small intestine submucosa ECM for CIEDs promoted fibrous tissues with less elastic fibers. Novel compression modeling analyses directly correlated this singular reduction to more desirable subcutaneous tissue mechanics.
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Affiliation(s)
- Roche C de Guzman
- Bioengineering Program, Department of Engineering, Hofstra University, Hempstead, NY, USA
| | - Allison S Meer
- Bioengineering Program, Department of Engineering, Hofstra University, Hempstead, NY, USA.,Department of Biology, Hofstra University, Hempstead, NY, USA
| | - Aidan A Mathews
- Bioengineering Program, Department of Engineering, Hofstra University, Hempstead, NY, USA.,Department of Biology, Hofstra University, Hempstead, NY, USA
| | - Atara R Israel
- Bioengineering Program, Department of Engineering, Hofstra University, Hempstead, NY, USA
| | - Michael T Moses
- Bioengineering Program, Department of Engineering, Hofstra University, Hempstead, NY, USA
| | - Clarence M Sams
- Bioengineering Program, Department of Engineering, Hofstra University, Hempstead, NY, USA
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In Vitro Evaluation of the Influence of Substrate Mechanics on Matrix-Assisted Human Chondrocyte Transplantation. J Funct Biomater 2020; 11:jfb11010005. [PMID: 31963629 PMCID: PMC7151603 DOI: 10.3390/jfb11010005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 01/09/2020] [Accepted: 01/15/2020] [Indexed: 11/25/2022] Open
Abstract
Matrix-assisted chondrocyte transplantation (MACT) is of great interest for the treatment of patients with cartilage lesions. However, the roles of the matrix properties in modulating cartilage tissue integration during MACT recovery have not been fully understood. The objective of this study was to uncover the effects of substrate mechanics on the integration of implanted chondrocyte-laden hydrogels with native cartilage tissues. To this end, agarose hydrogels with Young’s moduli ranging from 0.49 kPa (0.5%, w/v) to 23.08 kPa (10%) were prepared and incorporated into an in vitro human cartilage explant model. The hydrogel-cartilage composites were cultivated for up to 12 weeks and harvested for evaluation via scanning electron microscopy, histology, and a push-through test. Our results demonstrated that integration strength at the hydrogel-cartilage interface in the 1.0% (0.93 kPa) and 2.5% (3.30 kPa) agarose groups significantly increased over time, whereas hydrogels with higher stiffness (>8.78 kPa) led to poor integration with articular cartilage. Extensive sprouting of extracellular matrix in the interfacial regions was only observed in the 0.5% to 2.5% agarose groups. Collectively, our findings suggest that while neocartilage development and its integration with native cartilage are modulated by substrate elasticity, an optimal Young’s modulus (3.30 kPa) possessed by agarose hydrogels is identified such that superior quality of tissue integration is achieved without compromising tissue properties of implanted constructs.
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Yang J, Dong Y, Wang J, Chen C, Zhu Y, Wu Y, Zhang P, Chen T, Zhou W, Wu P, Thanh NTK, Ngoc Quyên Trân, Chen J, Chen S. Hydroxypropylcellulose Coating to Improve Graft-to-Bone Healing for Anterior Cruciate Ligament Reconstruction. ACS Biomater Sci Eng 2019; 5:1793-1803. [PMID: 33405554 DOI: 10.1021/acsbiomaterials.8b01145] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Jianjun Yang
- Department of Orthopaedics, Tenth People’s Hospital of Tongji University, Shanghai 200072, People’s Republic of China
| | - Yu Dong
- Fudan University Sports Medicine Center and Department of Sports Medicine and Arthroscopy Surgery, Huashan Hospital, Fudan University, Shanghai 200040, People’s Republic of China
| | - Jianguang Wang
- Department of Orthopaedics, Tenth People’s Hospital of Tongji University, Shanghai 200072, People’s Republic of China
| | - Chen Chen
- Sports Medicine Center, Shanghai Six People’s Hospital and Six People’s Hospital Affiliated with Shanghai Jiaotong University, Shanghai 200233, People’s Republic of China
| | - Yuchang Zhu
- Department of Orthopaedics, Tenth People’s Hospital of Tongji University, Shanghai 200072, People’s Republic of China
| | - Yang Wu
- Fudan University Sports Medicine Center and Department of Sports Medicine and Arthroscopy Surgery, Huashan Hospital, Fudan University, Shanghai 200040, People’s Republic of China
| | - Peng Zhang
- Fudan University Sports Medicine Center and Department of Sports Medicine and Arthroscopy Surgery, Huashan Hospital, Fudan University, Shanghai 200040, People’s Republic of China
| | - Tianwu Chen
- Fudan University Sports Medicine Center and Department of Sports Medicine and Arthroscopy Surgery, Huashan Hospital, Fudan University, Shanghai 200040, People’s Republic of China
| | - Weifeng Zhou
- Department of Orthopaedics, Cixi People’s Hospital and Cixi Hospital Affiliated with Wenzhou Medical University, Ningbo 315300, People’s Republic of China
| | - Peiyi Wu
- Key Laboratory of Molecular Engineering of Polymers of Ministry of Education, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, Shanghai 200433, People’s Republic of China
| | - Nguyen T. K. Thanh
- Biophysics Group, Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
| | - Ngoc Quyên Trân
- Institute of Applied Materials Science, Vietnam Academy Science and Technology, Ho Chi Minh City, 700000, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, 700000, Vietnam
| | - Jun Chen
- Fudan University Sports Medicine Center and Department of Sports Medicine and Arthroscopy Surgery, Huashan Hospital, Fudan University, Shanghai 200040, People’s Republic of China
| | - Shiyi Chen
- Fudan University Sports Medicine Center and Department of Sports Medicine and Arthroscopy Surgery, Huashan Hospital, Fudan University, Shanghai 200040, People’s Republic of China
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Zone-specific integrated cartilage repair using a scaffold-free tissue engineered construct derived from allogenic synovial mesenchymal stem cells: Biomechanical and histological assessments. J Biomech 2015; 48:4101-4108. [PMID: 26549765 DOI: 10.1016/j.jbiomech.2015.10.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 09/22/2015] [Accepted: 10/10/2015] [Indexed: 02/08/2023]
Abstract
The purpose of the present study was to investigate the zone-specific integration properties of articular cartilage defects treated in vivo with scaffold-free three-dimensional tissue-engineered constructs (TECs) derived from allogenic synovial mesenchymal stem cells (MSCs) in a porcine model. The TEC derived from the synovial MSCs was implanted into chondral defects in the medial femoral condyle of the knee. The integration boundary of repair tissue with the adjacent host cartilage was morphologically and biomechanically evaluated at 6 months post-implantation. Histological assessments showed that the repair tissue in each zone was well integrated with the adjacent host cartilage, with an apparent secure continuity of the extracellular matrix. There were no significant differences in histological scores between the integration boundary and the center of the repair tissue at every zone. Nonetheless, in all the specimens subjected to mechanical testing, failure occurred at the integration boundary. The average tensile strength of the integration boundary vs normal cartilage was 0.6 vs 4.9, 3.0 vs 12.6, and 5.5 vs 12.8MPa at the superficial, middle, and deep layers, respectively. Thus, these results indicate the most fragile point in the repair tissue remained at the integration boundary in spite of the apparent secure tissue continuity and equivalent histological quality with the center of the repair tissue. Such tissue vulnerability at the surface integration boundary could affect the long-term durability of the tissue repair, and thus, special consideration will be needed in the post-operative rehabilitation programming to enhance the longevity of such repair tissues in response to normal knee loading.
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Engineered cartilaginous tubes for tracheal tissue replacement via self-assembly and fusion of human mesenchymal stem cell constructs. Biomaterials 2015; 52:452-62. [PMID: 25818451 DOI: 10.1016/j.biomaterials.2015.01.073] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 01/22/2015] [Accepted: 01/25/2015] [Indexed: 01/14/2023]
Abstract
There is a critical need to engineer a neotrachea because currently there are no long-term treatments for tracheal stenoses affecting large portions of the airway. In this work, a modular tracheal tissue replacement strategy was developed. High-cell density, scaffold-free human mesenchymal stem cell-derived cartilaginous rings and tubes were successfully generated through employment of custom designed culture wells and a ring-to-tube assembly system. Furthermore, incorporation of transforming growth factor-β1-delivering gelatin microspheres into the engineered tissues enhanced chondrogenesis with regard to tissue size and matrix production and distribution in the ring- and tube-shaped constructs, as well as luminal rigidity of the tubes. Importantly, all engineered tissues had similar or improved biomechanical properties compared to rat tracheas, which suggests they could be transplanted into a small animal model for airway defects. The modular, bottom up approach used to grow stem cell-based cartilaginous tubes in this report is a promising platform to engineer complex organs (e.g., trachea), with control over tissue size and geometry, and has the potential to be used to generate autologous tissue implants for human clinical applications.
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Abstract
Many technologies that underpin tissue engineering as a research field were developed with the aim of producing functional human cartilage in vitro. Much of our practical experience with three-dimensional cultures, tissue bioreactors, scaffold materials, stem cells, and differentiation protocols was gained using cartilage as a model system. Despite these advances, however, generation of engineered cartilage matrix with the composition, structure, and mechanical properties of mature articular cartilage has not yet been achieved. Currently, the major obstacles to synthesis of clinically useful cartilage constructs are our inability to control differentiation to the extent needed, and the failure of engineered and host tissues to integrate after construct implantation. The aim of this chapter is to distil from the large available body of literature the seminal approaches and experimental techniques developed for cartilage tissue engineering and to identify those specific areas requiring further research effort.
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Affiliation(s)
- Pauline M Doran
- Faculty of Science, Engineering and Technology, Swinburne University of Technology, 218, Hawthorn, Melbourne, VIC, 3122, Australia.
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