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Crisol M, Wu K, Congdon B, Skene-Arnold TD, Laouar L, Elliott JAW, Jomha NM. Chondrocyte Viability of Particulated Porcine Articular Cartilage Is Maintained in Tissue Storage After Cryoprotectant Exposure, Vitrification, and Tissue Warming. Cartilage 2024; 15:139-146. [PMID: 37148124 DOI: 10.1177/19476035221118656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/07/2023] Open
Abstract
OBJECTIVE Vitrification of articular cartilage (AC) is a promising technique which may enable long-term tissue banking of AC allografts. We previously developed a 2-step, dual-temperature, multi-cryoprotectant agent (CPA) loading protocol to cryopreserve particulated AC (1 mm3 cubes). Furthermore, we also determined that the inclusion of ascorbic acid (AA) effectively mitigates CPA toxicity in cryopreserved AC. Prior to clinical translation, chondrocytes must remain viable after tissue re-warming and before transplantation. However, the effects of short-term hypothermic storage of particulated AC after vitrification and re-warming are not documented. This study evaluated the chondrocyte viability of post-vitrified particulated AC during a 7-day tissue storage period at 4 °C. We hypothesized that porcine particulated AC could be stored for up to 7 days after successful vitrification without significant loss of cell viability, and these results would be enhanced when cartilage is incubated in storage medium supplemented with clinical grade AA. DESIGN Three experimental groups were examined at 5 time points: a fresh control (only incubated in medium), a vitrified - AA group, and a vitrified + AA group (N = 7). RESULTS There was a mild decline in cell viability but both treatment groups maintained a viability of greater than 80% viable cells which is acceptable for clinical translation. CONCLUSION We determined that particulated AC can be stored for up to 7 days after successful vitrification without a clinically significant decline in chondrocyte viability. This information can be used to guide tissue banks regarding the implementation of AC vitrification to increase cartilage allograft availability.
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Affiliation(s)
- Mary Crisol
- Department of Surgery, University of Alberta, Edmonton, AB, Canada
| | - Kezhou Wu
- Department of Surgery, University of Alberta, Edmonton, AB, Canada
- Sports Medicine Centre, Department of Orthopedic Surgery, First Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong, China
| | - Barry Congdon
- Department of Surgery, University of Alberta, Edmonton, AB, Canada
| | | | - Leila Laouar
- Department of Surgery, University of Alberta, Edmonton, AB, Canada
| | - Janet A W Elliott
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, Canada
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - Nadr M Jomha
- Department of Surgery, University of Alberta, Edmonton, AB, Canada
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2
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Desai B, Assid E, Jacobs G, Dasgupta A, Williams G, Choate WS, Montgomery S, Godshaw B, Suri M, Jones D. Viable cartilage allograft outperforms existing treatments for focal knee cartilage defects. Knee Surg Sports Traumatol Arthrosc 2024; 32:636-644. [PMID: 38391111 DOI: 10.1002/ksa.12074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 01/19/2024] [Indexed: 02/24/2024]
Abstract
PURPOSE Viable cartilage allograft (VCA) is a cartilage tissue matrix that contains cryopreserved viable allogeneic cartilage fibres. This study aimed to assess safety and benefits in treating focal knee cartilage defects with VCA. We hypothesized that VCA is a safe single-stage procedure in isolated chondral defects. METHOD In vitro analysis, in vivo studies and a prospective case series were performed. VCA was evaluated in a goat cartilage repair model. Symptomatic International Cartilage Repair Society grade 3/4A lesions of the femoral condyle or patella were implanted with VCA. International Knee Documentation Committee (IKDC), Knee injury and Osteoarthritis Outcome (KOOS) subscales, Lysholm, Short Form-12, Visual Analog Scale and pain frequency levels were assessed. Radiographic and magnetic resonance imaging (MRI) was performed at regular intervals postoperatively. Data were analysed by statisticians to determine the power and significance of the results. RESULTS The goat study confirmed that VCA is effective for cartilage repair. Twenty patients were implanted; the mean age was 28.1 (16-56), the mean body mass index (BMI) was 27.9 ± 5.6 and the mean follow-up was 24.1 months (range = 12.0-36.0 months). Lesions were in either the femoral condyle (7) or patella (13). Lesion sizes ranged from 1.5 to 6.0 cm2 (mean = 4.58 cm2 ). Outcome scores improved from preoperative baseline (POB): IKDC (78.2), Lysholm (89.0), KOOS: Pain (95.8), Symptoms (86.3), ADL (87.8), Sports (85.0) and QOL (75.0). MRI imaging demonstrated excellent osteochondral allograft assimilation. Second-look arthroscopy (two patients) demonstrated complete fill and incorporation (Brittberg scores 11/12). Functional scores were maintained at 24 (M): IKDC (86.24 ± 17.2), Lysholm (87.23 ± 15.0), KOOS: Pain (91.72 ± 17.3), Symptoms (84.92 ± 16.1), ADLs (93.80 ± 16.1), Sports (84.45 ± 27.7), QOL (81.30 ± 20.8). CONCLUSION VCA is an off-the-shelf, single-stage, conformable allogeneic graft that treats chondral defects with no additional fixation. Preclinical and short-term prospective clinical studies show that VCA can safely treat chondral defects with potential advantages to existing options. LEVEL OF EVIDENCE Level IV study.
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Affiliation(s)
- Bhumit Desai
- Ochsner Medical Center, Department of Orthopaedic Surgery, New Orleans, Louisiana, USA
| | - Eric Assid
- Ochsner Medical Center, Department of Orthopaedic Surgery, New Orleans, Louisiana, USA
- Ochsner Sports Medicine Institute, University of Queensland, Ochsner Clinical School, New Orleans, Louisiana, USA
| | - Graylin Jacobs
- Ochsner Sports Medicine Institute, University of Queensland, Ochsner Clinical School, New Orleans, Louisiana, USA
| | - Anouska Dasgupta
- MTF (Musculoskeletal Transplant Foundation) Biologics, Edison, New Jersey, USA
| | - Gerard Williams
- Howard University Orthopaedic Hospital, Washington, District of Columbia, USA
| | - Walter Stephen Choate
- Ochsner Medical Center, Department of Orthopaedic Surgery, New Orleans, Louisiana, USA
- Ochsner Sports Medicine Institute, University of Queensland, Ochsner Clinical School, New Orleans, Louisiana, USA
| | - Scott Montgomery
- Ochsner Medical Center, Department of Orthopaedic Surgery, New Orleans, Louisiana, USA
- Ochsner Sports Medicine Institute, University of Queensland, Ochsner Clinical School, New Orleans, Louisiana, USA
| | - Brian Godshaw
- Ochsner Medical Center, Department of Orthopaedic Surgery, New Orleans, Louisiana, USA
- Ochsner Sports Medicine Institute, University of Queensland, Ochsner Clinical School, New Orleans, Louisiana, USA
| | - Misty Suri
- Ochsner Medical Center, Department of Orthopaedic Surgery, New Orleans, Louisiana, USA
- Ochsner Sports Medicine Institute, University of Queensland, Ochsner Clinical School, New Orleans, Louisiana, USA
| | - Deryk Jones
- Ochsner Medical Center, Department of Orthopaedic Surgery, New Orleans, Louisiana, USA
- Ochsner Sports Medicine Institute, University of Queensland, Ochsner Clinical School, New Orleans, Louisiana, USA
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3
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Nascimento MB, Moura YBF, Oliveira REM, Borges AA, Oliveira MF, Luna FO, Attademo FLN, Pereira AF. Influence of Intracellular Cryoprotectants on the Conservation of Dermal Somatic Tissues Derived from Antillean Manatees ( Trichechus manatus manatus Linnaeus, 1758). Biopreserv Biobank 2023; 21:483-492. [PMID: 36459125 DOI: 10.1089/bio.2022.0044] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Cryopreservation of somatic tissue has been studied as a tool for the knowledge and conservation of endangered species, such as Antillean manatees. The use of vitrification protocols is an important step in the establishment of biological banks. To decrease the damage caused by this technique, a reduction in the concentration of cryoprotectants has been proposed. Therefore, we aimed to evaluate combinations and concentrations of intracellular cryoprotectants for the conservation of somatic tissues derived from Antillean manatees. Dulbecco's modified Eagle's medium, F-12 composed of 10% fetal bovine serum and 0.25 M sucrose, was supplemented with 3.0 M ethylene glycol (EG) plus 3.0 M dimethyl sulfoxide (DMSO), or 1.5 M EG plus 1.5 M DMSO or 3.0 M EG or 3.0 M DMSO, to produce four solutions for solid-surface vitrification. Noncryopreserved tissues were used as the controls. After warming, tissues derived from four Antillean manatees were evaluated for ultrastructure, histology, and in vitro culture. No differences were observed among the cryopreserved and noncryopreserved tissues in terms of ultrastructure. The dermis thickness of the cryopreserved fragments in solutions containing 3.0 M EG plus 3.0 M DMSO, 3.0 M EG, and 3.0 DMSO was similar to that of the control. Moreover, cryopreservation with 3.0 M EG plus 3.0 M DMSO maintained tissue proliferative capacity potential evaluated by quantification of nucleolar organizing regions. Nevertheless, none of the cryopreserved fragments were able to maintain the number of fibroblasts and the collagen percentage as compared with that of the noncryopreserved fragments. Also, none of the cryopreserved fragments in the different solutions were able to produce cells in vitro. In summary, even reducing the concentration of intracellular cryoprotectants as well as their association did not guarantee the maintenance of cells after in vitro culture. Further studies are needed to optimize the cryopreservation protocols in Antillean manatee somatic tissues.
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Affiliation(s)
- Matheus B Nascimento
- Department of Biosciences, Laboratory of Animal Biotechnology, Laboratory of Applied Animal Morphophysiology, Federal Rural University of Semi-Arid (UFERSA), Mossoro, Brazil
| | - Yasmin B F Moura
- Department of Biosciences, Laboratory of Animal Biotechnology, Laboratory of Applied Animal Morphophysiology, Federal Rural University of Semi-Arid (UFERSA), Mossoro, Brazil
| | - Radan E M Oliveira
- Department of Animal Sciences, Laboratory of Applied Animal Morphophysiology, Federal Rural University of Semi-Arid (UFERSA), Mossoro, Brazil
| | - Alana A Borges
- Department of Biosciences, Laboratory of Animal Biotechnology, Laboratory of Applied Animal Morphophysiology, Federal Rural University of Semi-Arid (UFERSA), Mossoro, Brazil
| | - Moacir F Oliveira
- Department of Animal Sciences, Laboratory of Applied Animal Morphophysiology, Federal Rural University of Semi-Arid (UFERSA), Mossoro, Brazil
| | - Fábia O Luna
- National Center for Research and Conservation of Aquatic Mammals by Chico Mendes Institute for Biodiversity Conservation, Santos, Brazil
| | - Fernanda L N Attademo
- National Center for Research and Conservation of Aquatic Mammals by Chico Mendes Institute for Biodiversity Conservation, Santos, Brazil
- Laboratory of Behavior and Conservation Ecology, Department of Zoology, Recife, Brazil
| | - Alexsandra F Pereira
- Department of Biosciences, Laboratory of Animal Biotechnology, Laboratory of Applied Animal Morphophysiology, Federal Rural University of Semi-Arid (UFERSA), Mossoro, Brazil
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Amini M, Benson JD. Technologies for Vitrification Based Cryopreservation. Bioengineering (Basel) 2023; 10:bioengineering10050508. [PMID: 37237578 DOI: 10.3390/bioengineering10050508] [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: 01/24/2023] [Revised: 03/08/2023] [Accepted: 03/30/2023] [Indexed: 05/28/2023] Open
Abstract
Cryopreservation is a unique and practical method to facilitate extended access to biological materials. Because of this, cryopreservation of cells, tissues, and organs is essential to modern medical science, including cancer cell therapy, tissue engineering, transplantation, reproductive technologies, and bio-banking. Among diverse cryopreservation methods, significant focus has been placed on vitrification due to low cost and reduced protocol time. However, several factors, including the intracellular ice formation that is suppressed in the conventional cryopreservation method, restrict the achievement of this method. To enhance the viability and functionality of biological samples after storage, a large number of cryoprotocols and cryodevices have been developed and studied. Recently, new technologies have been investigated by considering the physical and thermodynamic aspects of cryopreservation in heat and mass transfer. In this review, we first present an overview of the physiochemical aspects of freezing in cryopreservation. Secondly, we present and catalog classical and novel approaches that seek to capitalize on these physicochemical effects. We conclude with the perspective that interdisciplinary studies provide pieces of the cryopreservation puzzle to achieve sustainability in the biospecimen supply chain.
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Affiliation(s)
- Mohammad Amini
- Department of Biology, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada
| | - James D Benson
- Department of Biology, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada
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Shajib MS, Futrega K, Franco RAG, McKenna E, Guillesser B, Klein TJ, Crawford RW, Doran MR. Method for manufacture and cryopreservation of cartilage microtissues. J Tissue Eng 2023; 14:20417314231176901. [PMID: 37529249 PMCID: PMC10387698 DOI: 10.1177/20417314231176901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 05/04/2023] [Indexed: 08/03/2023] Open
Abstract
The financial viability of a cell and tissue-engineered therapy may depend on the compatibility of the therapy with mass production and cryopreservation. Herein, we developed a method for the mass production and cryopreservation of 3D cartilage microtissues. Cartilage microtissues were assembled from either 5000 human bone marrow-derived stromal cells (BMSC) or 5000 human articular chondrocytes (ACh) each using a customized microwell platform (the Microwell-mesh). Microtissues rapidly accumulate homogenous cartilage-like extracellular matrix (ECM), making them potentially useful building blocks for cartilage defect repair. Cartilage microtissues were cultured for 5 or 10 days and then cryopreserved in 90% serum plus 10% dimethylsulfoxide (DMSO) or commercial serum-free cryopreservation media. Cell viability was maximized during thawing by incremental dilution of serum to reduce oncotic shock, followed by washing and further culture in serum-free medium. When assessed with live/dead viability dyes, thawed microtissues demonstrated high viability but reduced immediate metabolic activity relative to unfrozen control microtissues. To further assess the functionality of the freeze-thawed microtissues, their capacity to amalgamate into a continuous tissue was assess over a 14 day culture. The amalgamation of microtissues cultured for 5 days was superior to those that had been cultured for 10 days. Critically, the capacity of cryopreserved microtissues to amalgamate into a continuous tissue in a subsequent 14-day culture was not compromised, suggesting that cryopreserved microtissues could amalgamate within a cartilage defect site. The quality ECM was superior when amalgamation was performed in a 2% O2 atmosphere than a 20% O2 atmosphere, suggesting that this process may benefit from the limited oxygen microenvironment within a joint. In summary, cryopreservation of cartilage microtissues is a viable option, and this manipulation can be performed without compromising tissue function.
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Affiliation(s)
- Md. Shafiullah Shajib
- School of Biomedical Science, Faculty of Health, Queensland University of Technology, Brisbane, QLD, Australia
- Centre for Biomedical Technologies, School of Mechanical, Medical, and Process Engineering, Faculty of Engineering, Queensland University of Technology, Brisbane, QLD, Australia
- Translational Research Institute, Brisbane, QLD, Australia
| | - Kathryn Futrega
- Centre for Biomedical Technologies, School of Mechanical, Medical, and Process Engineering, Faculty of Engineering, Queensland University of Technology, Brisbane, QLD, Australia
- Translational Research Institute, Brisbane, QLD, Australia
- National Institute of Dental and Craniofacial Research, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA
| | - Rose Ann G Franco
- Centre for Biomedical Technologies, School of Mechanical, Medical, and Process Engineering, Faculty of Engineering, Queensland University of Technology, Brisbane, QLD, Australia
- Translational Research Institute, Brisbane, QLD, Australia
| | - Eamonn McKenna
- Centre for Biomedical Technologies, School of Mechanical, Medical, and Process Engineering, Faculty of Engineering, Queensland University of Technology, Brisbane, QLD, Australia
- Translational Research Institute, Brisbane, QLD, Australia
| | - Bianca Guillesser
- School of Biomedical Science, Faculty of Health, Queensland University of Technology, Brisbane, QLD, Australia
- Centre for Biomedical Technologies, School of Mechanical, Medical, and Process Engineering, Faculty of Engineering, Queensland University of Technology, Brisbane, QLD, Australia
- Translational Research Institute, Brisbane, QLD, Australia
| | - Travis J Klein
- Centre for Biomedical Technologies, School of Mechanical, Medical, and Process Engineering, Faculty of Engineering, Queensland University of Technology, Brisbane, QLD, Australia
| | - Ross W Crawford
- Centre for Biomedical Technologies, School of Mechanical, Medical, and Process Engineering, Faculty of Engineering, Queensland University of Technology, Brisbane, QLD, Australia
| | - Michael R Doran
- School of Biomedical Science, Faculty of Health, Queensland University of Technology, Brisbane, QLD, Australia
- Centre for Biomedical Technologies, School of Mechanical, Medical, and Process Engineering, Faculty of Engineering, Queensland University of Technology, Brisbane, QLD, Australia
- Translational Research Institute, Brisbane, QLD, Australia
- National Institute of Dental and Craniofacial Research, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA
- Mater Research Institute – University of Queensland, Brisbane, QLD, Australia
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6
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Yong KW, Wu K, Elliott JAW, Jomha NM. The effect of sucrose supplementation on chondrocyte viability in porcine articular cartilage following vitrification. Cryobiology 2022; 109:53-61. [PMID: 36155184 DOI: 10.1016/j.cryobiol.2022.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 09/14/2022] [Accepted: 09/17/2022] [Indexed: 02/05/2023]
Abstract
Vitrification can extend the banking life of articular cartilage (AC) and improve osteochondral transplantation success. Current vitrification protocols require optimization to enable them to be implemented in clinical practice. Sucrose as a non-permeating cryoprotective agent (CPA) and clinical grade chondroitin sulfate (CS) and ascorbic acid (AA) as antioxidants were investigated for their ability to improve a current vitrification protocol for AC. The aim of this study was to assess the impact of sucrose and CS/AA supplementation on post-warming chondrocyte viability in vitrified AC. Porcine osteochondral dowels were randomly vitrified and warmed with one established protocol (Protocol 1) and seven modified protocols (Protocols 2-8) followed by chondrocyte viability assessment. Sucrose supplementation in both vitrification and warming media (Protocol 4) resulted in significantly higher (p = 0.018) post-warming chondrocyte viability compared to the protocol without sucrose (Protocol 1). There was no significant difference (p = 0.298) in terms of post-warming chondrocyte viability between sucrose-supplemented DMEM + CS solution (Protocol 4) and Unisol-CV (UCV) + CS (Protocol 6) solution. Clinical grade CS and AA contributed to similar post-warming chondrocyte viability to previous studies using research grade CS and AA, indicating their suitability for clinical use. The addition of an initial step (step 0) to reduce the initial concentration of CPAs to minimize osmotic effects did not enhance chondrocyte viability in the superficial layer of AC. In conclusion, sucrose-supplemented DMEM + clinical grade CS (Protocol 4) could be an ideal protocol to be investigated for future use in clinical applications involving vitrified AC.
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Affiliation(s)
- Kar Wey Yong
- Department of Surgery, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB, T6G 2B7, Canada
| | - Kezhou Wu
- Department of Surgery, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB, T6G 2B7, Canada
- Department of Orthopedic Surgery, First Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong, China
| | - Janet A W Elliott
- Department of Chemical and Materials Engineering, Faculty of Engineering, University of Alberta, Edmonton, AB, T6G 1H9, Canada; Department of Laboratory Medicine and Pathology, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB, T6G 2R7, Canada
| | - Nadr M Jomha
- Department of Surgery, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB, T6G 2B7, Canada
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7
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Clark S, Jomha NM, Elliott JAW. Modeling the Simultaneous Transport of Multiple Cryoprotectants into Articular Cartilage Using a Triphasic Model. J Phys Chem B 2022; 126:9566-9579. [PMID: 36351190 PMCID: PMC9707523 DOI: 10.1021/acs.jpcb.2c05736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 10/12/2022] [Indexed: 11/10/2022]
Abstract
Cryopreserving articular cartilage by vitrification can increase the availability of tissue for osteochondral allograft transplantation to treat cartilage defects. Developing well-optimized vitrification protocols can be supported by mathematical modeling to reduce the amount of trial-and-error experimentation needed. Fick's law has been used to model cryoprotectant diffusion, but it assumes ideal, dilute solution behavior, neglects water movement, and assumes diffusion of each cryoprotectant is independent of the presence of other cryoprotectants. The modified triphasic model addresses some of these shortcomings by accounting for water movement and the nonideal, nondilute nature of cryoprotectant vitrification solutions. However, it currently only exists for solutions containing a single cryoprotectant. As such, we extend the modified triphasic model to include two permeating cryoprotectants so that simultaneous diffusion occurring in vitrification protocols can be more accurately modeled. Using previously published experimental data, we determine suitable values for the fitting parameters of the new model. We then model a successful vitrification protocol for particulated cartilage cubes by calculating concentration, freezing point, vitrifiability, and strain profiles at the end of each loading step. We observe that Fick's law consistently underestimates cryoprotectant concentration throughout the cartilage compared to the modified triphasic model, leading to an underestimation of tissue vitrifiability. We additionally observe that simultaneous diffusion of cryoprotectants increases the permeation rate of each individual cryoprotectant, which Fick's law fails to consider. This suggests that using the two-cryoprotectant modified triphasic model to develop vitrification protocols could reduce excess exposure to cryoprotectants and improve preserved tissue outcomes.
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Affiliation(s)
- Shannon Clark
- Department
of Chemical and Materials Engineering, University
of Alberta, Edmonton, AlbertaT6G 1H9, Canada
| | - Nadr M. Jomha
- Department
of Surgery, University of Alberta, Edmonton, AlbertaT6G 2B7, Canada
| | - Janet A. W. Elliott
- Department
of Chemical and Materials Engineering, University
of Alberta, Edmonton, AlbertaT6G 1H9, Canada
- Department
of Laboratory Medicine and Pathology, University
of Alberta, Edmonton, AlbertaT6G 1C9, Canada
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8
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Wu K, Yong KW, Ead M, Sommerfeldt M, Skene-Arnold TD, Westover L, Duke K, Laouar L, Elliott JA, Jomha NM. Vitrified Particulated Articular Cartilage for Joint Resurfacing: A Swine Model. Am J Sports Med 2022; 50:3671-3680. [PMID: 36259633 PMCID: PMC9630855 DOI: 10.1177/03635465221123045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 07/12/2022] [Indexed: 02/05/2023]
Abstract
BACKGROUND The use of particulated articular cartilage for repairing cartilage defects has been well established, but its use is currently limited by the availability and short shelf life of donor cartilage. Vitrification is an ice-free cryopreservation technology at ultralow temperatures for tissue banking. An optimized vitrification protocol has been developed for particulated articular cartilage; however, the equivalency of the long-term clinical efficacy of vitrified particulated articular cartilage compared with fresh articular cartilage has not yet been determined. HYPOTHESIS The repair effect of vitrified particulated cartilage from pigs would be equivalent to or better than that of fresh particulated cartilage stored at 4°C for 21 days. STUDY DESIGN Controlled laboratory study. METHODS A total of 19 pigs were randomly divided into 3 experimental groups: fresh particulated cartilage group (n = 8), vitrified particulated cartilage group (n = 8), and negative control group (no particulated cartilage in the defect; n = 3). An additional pig was used as the initial cartilage donor for the first set of surgical procedures. Pigs were euthanized after 6 months to obtain femoral condyles, and the contralateral condyle was used as the positive (no defect) control. Samples were evaluated for gross morphology using the Outerbridge and Osteoarthritis Research Society International (OARSI) scoring systems, histology (safranin O, collagen type I/II, DAPI), and chondrocyte viability using live-dead membrane integrity staining. RESULTS There were no infections after surgery, and all 19 pigs were followed for the duration of the study. The OARSI grades for the fresh and vitrified particulated cartilage groups were 2.44 ± 1.35 and 2.00 ± 0.80, respectively, while the negative control group was graded significantly higher at 4.83 ± 0.29. Analysis of histological and fluorescent staining demonstrated that the fresh and vitrified particulated cartilage groups had equivalent regeneration within cartilage defects, with similar cell viability and densities and expression of proteoglycans and collagen type I/II. CONCLUSION The implantation of fresh or vitrified particulated cartilage resulted in the equivalent repair of focal cartilage defects when evaluated at 6 months after surgery. CLINICAL RELEVANCE The vitrification of particulated cartilage is a viable option for long-term storage for cartilage tissue banking and could greatly increase the availability of donor tissue for transplantation.
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Affiliation(s)
- Kezhou Wu
- Sports Medicine Center, First
Affiliated Hospital, Shantou University Medical College, Shantou, China
- Department of Surgery, University of
Alberta, Edmonton, Alberta, Canada
| | - Kar Wey Yong
- Department of Surgery, University of
Alberta, Edmonton, Alberta, Canada
| | - Maha Ead
- Department of Mechanical Engineering,
University of Alberta, Edmonton, Alberta, Canada
| | - Mark Sommerfeldt
- Department of Surgery, University of
Alberta, Edmonton, Alberta, Canada
| | | | - Lindsey Westover
- Department of Mechanical Engineering,
University of Alberta, Edmonton, Alberta, Canada
| | - Kajsa Duke
- Department of Mechanical Engineering,
University of Alberta, Edmonton, Alberta, Canada
| | - Leila Laouar
- Department of Surgery, University of
Alberta, Edmonton, Alberta, Canada
| | - Janet A.W. Elliott
- Department of Chemical and Materials
Engineering, University of Alberta, Edmonton, Alberta, Canada
- Department of Laboratory Medicine and
Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - Nadr M. Jomha
- Department of Surgery, University of
Alberta, Edmonton, Alberta, Canada
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9
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Biomolecular Pathways of Cryoinjuries in Low-Temperature Storage for Mammalian Specimens. Bioengineering (Basel) 2022; 9:bioengineering9100545. [PMID: 36290513 PMCID: PMC9598205 DOI: 10.3390/bioengineering9100545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/26/2022] [Accepted: 09/30/2022] [Indexed: 11/22/2022] Open
Abstract
Low-temperature preservation could effectively extend in vitro storage of biological materials due to delayed or suspended cellular metabolism and decaying as illustrated by the Arrhenius model. It is widely used as an enabling technology for a variety of biomedical applications such as cell therapeutics, assisted reproductive technologies, organ transplantation, and mRNA medicine. Although the technology to minimize cryoinjuries of mammalian specimens during preservation has been advanced substantially over past decades, mammalian specimens still suffer cryoinjuries under low-temperature conditions. Particularly, the molecular mechanisms underlying cryoinjuries are still evasive, hindering further improvement and development of preservation technologies. In this paper, we systematically recapitulate the molecular cascades of cellular injuries induced by cryopreservation, including apoptosis, necroptosis, ischemia-reperfusion injury (IRI). Therefore, this study not only summarizes the impact of low-temperature preservations on preserved cells and organs on the molecular level, but also provides a molecular basis to reduce cryoinjuries for future exploration of biopreservation methods, materials, and devices.
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10
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He J, Wine I, Wu K, Sevick J, Laouar L, Jomha NM, Westover L. Effect of vitrification on mechanical properties of porcine articular cartilage. Proc Inst Mech Eng H 2022; 236:1521-1527. [PMID: 36169308 PMCID: PMC9574425 DOI: 10.1177/09544119221122066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 08/08/2022] [Indexed: 02/05/2023]
Abstract
Articular cartilage (AC) injuries do not heal primarily and large lesions progress to degenerative osteoarthritis. Osteochondral allograft transplantation is an effective surgical treatment but is limited by the lack of donor tissue availability. Fresh allografts can be stored hypothermically up to 28-45 days after which the tissue is no longer viable for transplantation. Vitrification is a method of cryopreservation with the potential to extend the storage time of AC. A specific protocol has been demonstrated to preserve high chondrocyte viability; however, its effect on various mechanical properties of the extracellular matrix (ECM) remains unknown and is the focus of this initial study. Porcine AC was subject to a defined vitrification protocol, using fresh and frozen samples as positive and negative controls, respectively; n = 20 for all three groups. Unconfined compression testing was used to assess mechanical properties of the tissue under rapid load, stress relaxation, and equilibrium conditions. The stress relaxation time constants (modeled with a 2-term Prony series) τ1 and τ2 were significantly lower for frozen (p = 0.014, p < 0.001) and vitrified (p = 0.009, p = 0.003) tissue compared to fresh, with no differences between frozen and vitrified samples (p = 0.848 and 0.105 for τ1 and τ2, respectively). These values indicate that frozen and vitrified samples relaxed more rapidly than fresh, which may suggest altered matrix composition and permeability post-treatment. These results represent the initial study in our experimental path to evaluate differences in mechanical properties of vitrified tissues.
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Affiliation(s)
- Jenny He
- Department of Surgery, University of Alberta, Edmonton, AB,
Canada
| | - Itai Wine
- Department of Civil and Environmental Engineering, University of
Alberta, Edmonton, AB, Canada
| | - Kezhou Wu
- Department of Surgery, University of Alberta, Edmonton, AB,
Canada
- Department of Orthopedic Surgery, First Affiliated Hospital, Shantou
University Medical College, Shantou, Guangdong, China
| | - Johnathan Sevick
- Department of Surgery, University of Alberta, Edmonton, AB,
Canada
| | - Leila Laouar
- Department of Surgery, University of Alberta, Edmonton, AB,
Canada
| | - Nadr M Jomha
- Department of Surgery, University of Alberta, Edmonton, AB,
Canada
| | - Lindsey Westover
- Department of Mechanical Engineering, University of Alberta,
Edmonton, AB, Canada
- Lindsey Westover, Department of Mechanical
Engineering, University of Alberta, 9211 116 Street NW, 10-371 D-ICE Building,
Edmonton, AB T6G 1H9, Canada.
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11
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Chen CM, Chen YC, Wang JY, Chen CF, Chao KY, Wu PK, Chen WM. A Cryoprotectant-Gel Composite Designed to Preserve Articular Cartilage during Frozen Osteoarticular Autograft Reconstruction for Malignant Bone Tumors: An Animal-Based Study. Cartilage 2022; 13:19476035221109228. [PMID: 35979907 PMCID: PMC9393690 DOI: 10.1177/19476035221109228] [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] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE We designed a highly adhesive cryoprotectant-gel composite (CGC), based on regular liquid-form cryoprotectant base (CB), aiming to protect cartilage tissue during frozen osteoarticular autograft reconstruction for high-grade sarcoma around the joint. This study aimed to evaluate its effectiveness in rat and porcine distal femur models. DESIGN Fresh articular cartilage samples harvested from distal rat and porcine femurs were divided into 4 test groups: untreated control group, liquid nitrogen (LN) freezing group, LN freezing group pretreated with CB (CB group), and LN freezing group pretreated with CGC (CGC group). Microscopic and macroscopic evaluation of cartilage condition, TUNEL (terminal deoxynucleotidyl transferase dUTP nick end labeling) assay, and apoptotic protein analysis of chondrocytes were performed to confirm our results. RESULTS In the rat model, CGC could prevent articular cartilage from roughness and preserve more proteoglycans when compared with the LN freezing and CB groups. Western blot analysis showed CGC could prevent cartilage from LN-induced apoptosis supported by caspase-3/8 apoptotic signaling cascade. Macroscopically, we observed CGC could reduce both articular clefting and loss of articular luminance after freezing in the porcine model. In both models, CGC could reduce articular chondrocytes from degeneration. Fewer TUNEL-positive apoptotic and more viable chondrocytes in cartilage tissue were observed in the CGC group in our animal models. CONCLUSION Our study proved that CGC could effectively prevent cartilage surface and chondrocytes from cryoinjury after LN freezing. Freezing articular cartilage surrounded with high concentration of CGC can be a better alternative to preserve articular cartilage during limb salvage surgery for malignant bone tumor.
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Affiliation(s)
- Chao-Ming Chen
- Department of Orthopaedic &
Traumatology, Taipei Veterans General Hospital, Taipei City, Taiwan,Therapeutical and Research Center of
Musculoskeletal Tumor, Taipei Veterans General Hospital, Taipei City, Taiwan,Institute of Clinical Medicine, School
of Medicine, National Yang Ming Chiao Tung University, Hsinchu, Taiwan,Department of Orthopaedic, School of
Medicine, National Yang Ming Chiao Tung University, Hsinchu, Taiwan
| | - Yi-Chun Chen
- Department of Orthopaedic &
Traumatology, Taipei Veterans General Hospital, Taipei City, Taiwan,Therapeutical and Research Center of
Musculoskeletal Tumor, Taipei Veterans General Hospital, Taipei City, Taiwan
| | - Jir-You Wang
- Department of Orthopaedic &
Traumatology, Taipei Veterans General Hospital, Taipei City, Taiwan,Therapeutical and Research Center of
Musculoskeletal Tumor, Taipei Veterans General Hospital, Taipei City, Taiwan,Institute of Traditional Medicine,
School of Medicine, National Yang Ming Chiao Tung University, Hsinchu, Taiwan
| | - Cheng-Fong Chen
- Department of Orthopaedic &
Traumatology, Taipei Veterans General Hospital, Taipei City, Taiwan,Therapeutical and Research Center of
Musculoskeletal Tumor, Taipei Veterans General Hospital, Taipei City, Taiwan,Department of Orthopaedic, School of
Medicine, National Yang Ming Chiao Tung University, Hsinchu, Taiwan
| | - Kuang-Yu Chao
- Department of Orthopaedic &
Traumatology, Taipei Veterans General Hospital, Taipei City, Taiwan,Therapeutical and Research Center of
Musculoskeletal Tumor, Taipei Veterans General Hospital, Taipei City, Taiwan
| | - Po-Kuei Wu
- Department of Orthopaedic &
Traumatology, Taipei Veterans General Hospital, Taipei City, Taiwan,Therapeutical and Research Center of
Musculoskeletal Tumor, Taipei Veterans General Hospital, Taipei City, Taiwan,Department of Orthopaedic, School of
Medicine, National Yang Ming Chiao Tung University, Hsinchu, Taiwan,Po-Kuei Wu, Department of Orthopaedic &
Traumatology, Taipei Veterans General Hospital, 201, Section 2, Shih-Pai Road,
Taipei City 112, Taiwan.
| | - Wei-Ming Chen
- Department of Orthopaedic &
Traumatology, Taipei Veterans General Hospital, Taipei City, Taiwan,Therapeutical and Research Center of
Musculoskeletal Tumor, Taipei Veterans General Hospital, Taipei City, Taiwan,Department of Orthopaedic, School of
Medicine, National Yang Ming Chiao Tung University, Hsinchu, Taiwan
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12
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Crisol M, Yong KW, Wu K, Laouar L, Elliott JAW, Jomha NM. Effectiveness of Clinical-Grade Chondroitin Sulfate and Ascorbic Acid in Mitigating Cryoprotectant Toxicity in Porcine Articular Cartilage. Biopreserv Biobank 2022; 20:401-408. [PMID: 34647812 DOI: 10.1089/bio.2021.0083] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
High concentrations of cryoprotective agents (CPAs) are required to achieve successful vitrification of articular cartilage; however, CPA cytotoxicity causes chondrocyte death. To reduce CPA toxicity, supplementation with research-grade additives, in particular chondroitin sulfate (CS) and ascorbic acid (AA), have previously been shown to improve chondrocyte recovery and metabolic function after exposure to CPAs at hypothermic conditions. However, it is necessary to evaluate the pharmaceutical equivalent clinical grade of these additives to facilitate the supplementation of additives into future vitrification protocols, which will be designed for vitrifying human articular cartilage in tissue banks. We sought to investigate the effectiveness of clinical-grade CS, AA, and N-acetylcysteine (NAC) in mitigating toxicity to chondrocytes during CPA exposure and removal, and determine whether a combination of two additives would further improve chondrocyte viability. We hypothesized that clinical-grade additives would exert chondroprotective effects comparable to those of research-grade additives, and that this protective effect would be enhanced if two additives were combined when compared with a single additive. The results indicated that both clinical-grade and research-grade additives significantly improved cell viability (p < 0.10) compared with the negative control (CPA with no additives). CS, AA, and NAC+AA increased cell viability significantly (p < 0.10) compared with the negative control. However, NAC, NAC+CS, and CS+AA did not improve cell viability when compared with the negative control (p > 0.10). We demonstrated that supplementation with clinical-grade CS or AA significantly improved chondrocyte viability in porcine cartilage subjected to high CPA concentrations, whereas supplementation with clinical-grade NAC did not benefit chondrocyte viability. Supplementation with clinical-grade additives in CPA solutions can mitigate CPA toxicity, which will be important in translating previously developed effective protocols for the vitrification of articular cartilage to human tissue banks.
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Affiliation(s)
- Mary Crisol
- Department of Surgery, University of Alberta, Edmonton, Alberta, Canada
| | - Kar Wey Yong
- Department of Surgery, University of Alberta, Edmonton, Alberta, Canada
| | - Kezhou Wu
- Department of Surgery, University of Alberta, Edmonton, Alberta, Canada
- Department of Orthopedic Surgery, First Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong, China
| | - Leila Laouar
- Department of Surgery, University of Alberta, Edmonton, Alberta, Canada
| | - Janet A W Elliott
- Department of Chemical and Materials Engineering and University of Alberta, Edmonton, Alberta, Canada
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - Nadr M Jomha
- Department of Surgery, University of Alberta, Edmonton, Alberta, Canada
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13
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Modelling and experimental studies on mass transport of multiple cryoprotective agents in articular cartilage. Cryobiology 2022; 108:57-66. [DOI: 10.1016/j.cryobiol.2022.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 07/14/2022] [Accepted: 07/14/2022] [Indexed: 11/22/2022]
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14
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Marquez-Curtis LA, Dai XQ, Hang Y, Lam JY, Lyon J, Manning Fox JE, McGann LE, MacDonald PE, Kim SK, Elliott JAW. Cryopreservation and post-thaw characterization of dissociated human islet cells. PLoS One 2022; 17:e0263005. [PMID: 35081145 PMCID: PMC8791532 DOI: 10.1371/journal.pone.0263005] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 01/06/2022] [Indexed: 12/22/2022] Open
Abstract
The objective of this study is to optimize the cryopreservation of dissociated islet cells and obtain functional cells that can be used in single-cell transcriptome studies on the pathology and treatment of diabetes. Using an iterative graded freezing approach we obtained viable cells after cooling in 10% dimethyl sulfoxide and 6% hydroxyethyl starch at 1°C/min to -40°C, storage in liquid nitrogen, rapid thaw, and removal of cryoprotectants by serial dilution. The expression of epithelial cell adhesion molecule declined immediately after thaw, but recovered after overnight incubation, while that of an endocrine cell marker (HPi2) remained high after cryopreservation. Patch-clamp electrophysiology revealed differences in channel activities and exocytosis of various islet cell types; however, exocytotic responses, and the biophysical properties of voltage-gated Na+ and Ca2+ channels, are sustained after cryopreservation. Single-cell RNA sequencing indicates that overall transcriptome and crucial exocytosis genes are comparable between fresh and cryopreserved dispersed human islet cells. Thus, we report an optimized procedure for cryopreserving dispersed islet cells that maintained their membrane integrity, along with their molecular and functional phenotypes. Our findings will not only provide a ready source of cells for investigating cellular mechanisms in diabetes but also for bio-engineering pseudo-islets and islet sheets for modeling studies and potential transplant applications.
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Affiliation(s)
- Leah A. Marquez-Curtis
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - Xiao-Qing Dai
- Department of Pharmacology and the Alberta Diabetes Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Yan Hang
- Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA, United States of America
- Stanford Diabetes Research Center, Stanford University School of Medicine, Stanford, CA, United States of America
| | - Jonathan Y. Lam
- Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA, United States of America
| | - James Lyon
- Department of Pharmacology and the Alberta Diabetes Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Jocelyn E. Manning Fox
- Department of Pharmacology and the Alberta Diabetes Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Locksley E. McGann
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - Patrick E. MacDonald
- Department of Pharmacology and the Alberta Diabetes Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Seung K. Kim
- Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA, United States of America
- Stanford Diabetes Research Center, Stanford University School of Medicine, Stanford, CA, United States of America
- Endocrinology Division, Department of Medicine, Stanford University School of Medicine, Stanford, CA, United States of America
| | - Janet A. W. Elliott
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
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15
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Abstract
OBJECTIVE Successful preservation of articular cartilage will increase the availability of osteochondral allografts to treat articular cartilage defects. We compared the effects of 2 methods for storing cartilage tissues using 10-mm diameter osteochondral dowels or femoral condyles at -196°C: (a) storage with a surrounding vitrification solution versus (b) storage without a surrounding vitrification solution. We investigated the effects of 2 additives (chondroitin sulfate and ascorbic acid) for vitrification of articular cartilage. DESIGN Healthy porcine stifle joints (n = 11) from sexually mature pigs were collected from a slaughterhouse within 6 hours after slaughtering. Dimethyl sulfoxide, ethylene glycol, and propylene glycol were permeated into porcine articular cartilage using an optimized 7-hour 3-step cryoprotectant permeation protocol. Chondrocyte viability was assessed by a cell membrane integrity stain and chondrocyte metabolic function was assessed by alamarBlue assay. Femoral condyles after vitrification were assessed by gross morphology for cartilage fractures. RESULTS There were no differences in the chondrocyte viability (~70%) of 10-mm osteochondral dowels after vitrification with or without the surrounding vitrification solution. Chondrocyte viability in porcine femoral condyles was significantly higher after vitrification without the surrounding vitrification solution (~70%) compared to those with the surrounding vitrification solution (8% to 36%). Moreover, articular cartilage fractures were not seen in femoral condyles vitrified without surrounding vitrification solution compared to fractures seen in condyles with surrounding vitrification solution. CONCLUSIONS Vitrification of femoral condyle allografts can be achieved by our optimized approach. Removing the surrounding vitrification solution is advantageous for vitrification outcomes of large size osteochondral allografts.
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Affiliation(s)
- Kezhou Wu
- Division of Orthopedic Surgery,
Department of Surgery, University of Alberta, Edmonton, Alberta, Canada
- Department of Orthopedic Surgery, First
Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong,
China
| | - Leila Laouar
- Division of Orthopedic Surgery,
Department of Surgery, University of Alberta, Edmonton, Alberta, Canada
| | - Janet A. W. Elliott
- Department of Chemical and Materials
Engineering, University of Alberta, Edmonton, Alberta, Canada
- Department of Laboratory Medicine and
Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - Nadr M. Jomha
- Division of Orthopedic Surgery,
Department of Surgery, University of Alberta, Edmonton, Alberta, Canada
- Nadr M. Jomha, 2D2.32 WMC, Division of
Orthopedic Surgery, Department of Surgery, University of Alberta Hospital,
Edmonton, Alberta, Canada T6G 2B7.
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16
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Wu K, Shardt N, Laouar L, Elliott JAW, Jomha NM. Vitrification of particulated articular cartilage via calculated protocols. NPJ Regen Med 2021; 6:15. [PMID: 33741977 PMCID: PMC7979917 DOI: 10.1038/s41536-021-00123-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Accepted: 02/01/2021] [Indexed: 02/05/2023] Open
Abstract
Preserving viable articular cartilage is a promising approach to address the shortage of graft tissue and enable the clinical repair of articular cartilage defects in articulating joints, such as the knee, ankle, and hip. In this study, we developed two 2-step, dual-temperature, multicryoprotectant loading protocols to cryopreserve particulated articular cartilage (cubes ~1 mm3 in size) using a mathematical approach, and we experimentally measured chondrocyte viability, metabolic activity, cell migration, and matrix productivity after implementing the designed loading protocols, vitrification, and warming. We demonstrated that porcine and human articular cartilage cubes can be successfully vitrified and rewarmed, maintaining high cell viability and excellent cellular function. The vitrified particulated articular cartilage was stored for a period of 6 months with no significant deterioration in chondrocyte viability and functionality. Our approach enables high-quality long-term storage of viable articular cartilage that can alleviate the shortage of grafts for use in clinically repairing articular cartilage defects.
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Affiliation(s)
- Kezhou Wu
- Department of Surgery, University of Alberta, Edmonton, AB, Canada
- Department of Orthopedic Surgery, First Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong, China
| | - Nadia Shardt
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, Canada
| | - Leila Laouar
- Department of Surgery, University of Alberta, Edmonton, AB, Canada
| | - Janet A W Elliott
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, Canada.
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada.
| | - Nadr M Jomha
- Department of Surgery, University of Alberta, Edmonton, AB, Canada.
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17
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Numerical Modeling of Heat and Mass Transfer during Cryopreservation Using Interval Analysis. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app11010302] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In the paper, the numerical analysis of heat and mass transfer proceeding in an axially symmetrical articular cartilage sample subjected to the cryopreservation process is presented. In particular, a two-dimensional (axially symmetrical) model with imprecisely defined parameters is considered. The base of the heat transfer model is given by the interval Fourier equation and supplemented by initial boundary conditions. The phenomenon of cryoprotectant transport (Me2SO) through the extracellular matrix is described by the interval mass transfer equation. The liquidus-tracking (LT) method is used to control the temperature, which avoids the formation of ice regardless of the cooling and warming rates. In the LT process, the temperature decreases/increases gradually during addition/removal of the cryoprotectant, and the articular cartilage remains on or above the liquidus line so that no ice forms, independent of the cooling/warming rate. The discussed problem is solved using the interval finite difference method with the rules of directed interval arithmetic. Examples of numerical computations are presented in the final part of the paper. The obtained results of the numerical simulation are compared with the experimental results, realized for deterministically defined parameters.
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18
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Meneghel J, Kilbride P, Morris GJ. Cryopreservation as a Key Element in the Successful Delivery of Cell-Based Therapies-A Review. Front Med (Lausanne) 2020; 7:592242. [PMID: 33324662 PMCID: PMC7727450 DOI: 10.3389/fmed.2020.592242] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 10/23/2020] [Indexed: 12/24/2022] Open
Abstract
Cryopreservation is a key enabling technology in regenerative medicine that provides stable and secure extended cell storage for primary tissue isolates and constructs and prepared cell preparations. The essential detail of the process as it can be applied to cell-based therapies is set out in this review, covering tissue and cell isolation, cryoprotection, cooling and freezing, frozen storage and transport, thawing, and recovery. The aim is to provide clinical scientists with an overview of the benefits and difficulties associated with cryopreservation to assist them with problem resolution in their routine work, or to enable them to consider future involvement in cryopreservative procedures. It is also intended to facilitate networking between clinicians and cryo-researchers to review difficulties and problems to advance protocol optimization and innovative design.
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Affiliation(s)
- Julie Meneghel
- Asymptote, Cytiva, Danaher Corporation, Cambridge, United Kingdom
| | - Peter Kilbride
- Asymptote, Cytiva, Danaher Corporation, Cambridge, United Kingdom
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19
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Rorick CB, Mitchell JA, Bledsoe RH, Floren ML, Wilkins RM. Cryopreserved, Thin, Laser-Etched Osteochondral Allograft maintains the functional components of articular cartilage after 2 years of storage. J Orthop Surg Res 2020; 15:521. [PMID: 33176819 PMCID: PMC7659100 DOI: 10.1186/s13018-020-02049-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 10/28/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Despite improvements in treatment options and techniques, articular cartilage repair continues to be a challenge for orthopedic surgeons. This study provides data to support that the 2-year Cryopreserved, Thin, Laser-Etched Osteochondral Allograft (T-LE Allograft) embodies the necessary viable cells, protein signaling, and extracellular matrix (ECM) scaffold found in fresh cartilage in order to facilitate a positive clinical outcome for cartilage defect replacement and repair. METHODS Viability testing was performed by digestion of the graft, and cells were counted using a trypan blue assay. Growth factor and ECM protein content was quantified using biochemical assays. A fixation model was introduced to assess tissue outgrowth capability and cellular metabolic activity in vitro. Histological and immunofluorescence staining were employed to confirm tissue architecture, cellular outgrowth, and presence of ECM. The effects of the T-LE Allograft to signal bone marrow-derived mesenchymal stem cell (BM-MSC) migration and chondrogenic differentiation were evaluated using in vitro co-culture assays. Immunogenicity testing was completed using flow cytometry analysis of cells obtained from digested T-LE Allografts and fresh articular cartilage. RESULTS Average viability of the T-LE Allograft post-thaw was found to be 94.97 ± 3.38%, compared to 98.83 ± 0.43% for fresh articular cartilage. Explant studies from the in vitro fixation model confirmed the long-term viability and proliferative capacity of these chondrocytes. Growth factor and ECM proteins were quantified for the T-LE Allograft revealing similar profiles to fresh articular cartilage. Cellular signaling of the T-LE Allograft and fresh articular cartilage both exhibited similar outcomes in co-culture for migration and differentiation of BM-MSCs. Flow cytometry testing confirmed the T-LE Allograft is immune-privileged as it is negative for immunogenic markers and positive for chondrogenic markers. CONCLUSIONS Using our novel, proprietary cryopreservation method, the T-LE Allograft, retains excellent cellular viability, with native-like growth factor and ECM composition of healthy cartilage after 2 years of storage at - 80 °C. The successful cryopreservation of the T-LE Allograft alleviates the limited availably of conventionally used fresh osteochondral allograft (OCA), by providing a readily available and simple to use allograft solution. The results presented in this paper supports clinical data that the T-LE Allograft can be a successful option for repairing chondral defects.
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Affiliation(s)
- Carolyn B Rorick
- Innovation Department, AlloSource, 6278 S Troy Circle, Centennial, CO, 80111, USA.
| | - Jordyn A Mitchell
- Innovation Department, AlloSource, 6278 S Troy Circle, Centennial, CO, 80111, USA
| | - Ruth H Bledsoe
- Innovation Department, AlloSource, 6278 S Troy Circle, Centennial, CO, 80111, USA
| | - Michael L Floren
- Innovation Department, AlloSource, 6278 S Troy Circle, Centennial, CO, 80111, USA
| | - Ross M Wilkins
- Innovation Department, AlloSource, 6278 S Troy Circle, Centennial, CO, 80111, USA
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20
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Han Z, Sharma A, Gao Z, Carlson TW, O’Sullivan MG, Finger EB, Bischof JC. Diffusion Limited Cryopreservation of Tissue with Radiofrequency Heated Metal Forms. Adv Healthc Mater 2020; 9:e2000796. [PMID: 32875732 PMCID: PMC7879698 DOI: 10.1002/adhm.202000796] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 07/15/2020] [Indexed: 01/25/2023]
Abstract
Cryopreserved tissues are increasingly needed in biomedical applications. However, successful cryopreservation is generally only reported for thin tissues (≤1 mm). This work presents several innovations to reduce cryoprotectant (CPA) toxicity and improve tissue cryopreservation, including 1) improved tissue warming rates through radiofrequency metal form and field optimization and 2) an experimentally verified predictive model to optimize CPA loading and rewarming to reduce toxicity. CPA loading is studied by microcomputed tomography (µCT) imaging, rewarming by thermal measurements, and modeling, and viability is measured after loading and/or cryopreservation by alamarBlue and histology. Loading conditions for three common CPA cocktails (6, 8.4, and 9.3 m) are designed, and then fast cooling and metal forms rewarming (up to 2000 °C min-1 ) achieve ≥90% viability in cryopreserved 1-2 mm arteries with various CPAs. Despite high viability by alamarBlue, histology shows subtle changes after cryopreservation suggesting some degree of cell damage especially in the central portions of thicker arteries up to 2 mm. While further studies are needed, these results show careful CPA loading and higher metal forms warming rates can help reduce CPA loading toxicity and improve outcomes from cryopreservation in tissues while also offering new protocols to preserve larger tissues ≥1 mm in thickness.
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Affiliation(s)
- Zonghu Han
- Department of Mechanical Engineering, University of Minnesota, 111 Church St. Minneapolis, MN, 55455, USA
| | - Anirudh Sharma
- Department of Mechanical Engineering, University of Minnesota, 111 Church St. Minneapolis, MN, 55455, USA
| | - Zhe Gao
- Department of Mechanical Engineering, University of Minnesota, 111 Church St. Minneapolis, MN, 55455, USA
| | - Timothy W. Carlson
- Department of Veterinary Population Medicine, Comparative Pathology Shared Resource, Masonic Cancer Center, University of Minnesota, 1988 Fitch Avenue, Saint Paul, MN 55108, USA
| | - M. Gerard O’Sullivan
- Department of Veterinary Population Medicine, Comparative Pathology Shared Resource, Masonic Cancer Center, University of Minnesota, 1988 Fitch Avenue, Saint Paul, MN 55108, USA
| | - Erik B. Finger
- Department of Surgery, University of Minnesota, 420 Delaware Street SE, Minneapolis, MN 55455, USA
| | - John C. Bischof
- Department of Mechanical Engineering, Department of Biomedical Engineering, University of Minnesota, 111 Church St. Minneapolis, MN, 55455, USA
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21
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Crisol M, Wu K, Laouar L, Elliott JAW, Jomha NM. Antioxidant additives reduce reactive oxygen species production in articular cartilage during exposure to cryoprotective agents. Cryobiology 2020; 96:114-121. [PMID: 32777334 DOI: 10.1016/j.cryobiol.2020.07.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 07/18/2020] [Accepted: 07/20/2020] [Indexed: 02/07/2023]
Abstract
High concentrations of cryoprotective agents (CPA) are required during articular cartilage cryopreservation but these CPAs can be toxic to chondrocytes. Reactive oxygen species have been linked to cell death due to oxidative stress. Addition of antioxidants has shown beneficial effects on chondrocyte survival and functions after cryopreservation. The objectives of this study were to investigate (1) oxidative stress experienced by chondrocytes and (2) the effect of antioxidants on cellular reactive oxygen species production during articular cartilage exposure to high concentrations of CPAs. Porcine cartilage dowels were exposed to a multi-CPA solution supplemented with either 0.1 mg/mL chondroitin sulfate or 2000 μM ascorbic acid, at 4 °C for 180 min (N = 7). Reactive oxygen species production was measured with 5 μM dihydroethidium, a fluorescent probe that targets reactive oxygen species. The cell viability was quantified with a dual cell membrane integrity stain containing 6.25 μM Syto 13 + 9 μM propidium iodide using confocal microscopy. Supplementation of CPA solutions with chondroitin sulfate or ascorbic acid resulted in significantly lower dihydroethidium counts (p < 0.01), and a lower decrease in the percentage of viable cells (p < 0.01) compared to the CPA-treated group without additives. These results indicated that reactive oxygen species production is induced when articular cartilage is exposed to high CPA concentrations, and correlated with the amount of dead cells. Both chondroitin sulfate and ascorbic acid treatments significantly reduced reactive oxygen species production and improved chondrocyte viability when articular cartilage was exposed to high concentrations of CPAs.
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Affiliation(s)
- Mary Crisol
- Department of Surgery, University of Alberta, Edmonton, AB, Canada
| | - Kezhou Wu
- Department of Surgery, University of Alberta, Edmonton, AB, Canada; Department of Orthopedic Surgery, First Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong, China
| | - Leila Laouar
- Department of Surgery, University of Alberta, Edmonton, AB, Canada
| | - Janet A W Elliott
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, Canada; Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - Nadr M Jomha
- Department of Surgery, University of Alberta, Edmonton, AB, Canada.
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22
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Yong KW, Laouar L, Elliott JAW, Jomha NM. Review of non-permeating cryoprotectants as supplements for vitrification of mammalian tissues. Cryobiology 2020; 96:1-11. [PMID: 32910946 DOI: 10.1016/j.cryobiol.2020.08.012] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 08/28/2020] [Accepted: 08/28/2020] [Indexed: 12/30/2022]
Abstract
Vitrification of mammalian tissues is important in the areas of human assisted reproduction, animal reproduction, and regenerative medicine. Non-permeating cryoprotectants (CPAs), particularly sucrose, are increasingly used in conjunction with permeating CPAs for vitrification of mammalian tissues. Combining non-permeating and permeating CPAs was found to further improve post-thaw viability and functionalities of vitrified mammalian tissues, showing the potential applications of such tissues in various clinical and veterinary settings. With the rising demand for the use of non-permeating CPAs in vitrification of mammalian tissues, there is a strong need for a timely and comprehensive review on the supplemental effects of non-permeating CPAs toward vitrification outcomes of mammalian tissues. In this review, we first discuss the roles of non-permeating CPAs including sugars and high molecular weight polymers in vitrification. We then summarize the supplemental effects of non-permeating CPAs on viability and functionalities of mammalian embryos, and ovarian, testicular, articular cartilage, tracheal, and kidney tissues following vitrification. Lastly, challenges associated with the use of non-permeating CPAs in vitrification of mammalian tissues are briefly discussed.
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Affiliation(s)
- Kar Wey Yong
- Department of Surgery, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB, T6G 2B7, Canada
| | - Leila Laouar
- Department of Surgery, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB, T6G 2B7, Canada
| | - Janet A W Elliott
- Department of Chemical and Materials Engineering, Faculty of Engineering, University of Alberta, Edmonton, AB, T6G 1H9, Canada; Department of Laboratory Medicine and Pathology, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB, T6G 2R7, Canada
| | - Nadr M Jomha
- Department of Surgery, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB, T6G 2B7, Canada.
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23
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Costa CA, Borges AA, Nascimento MB, Aquino LV, Silva AR, Oliveira MF, Pereira AF. Effects of Vitrification Techniques on the Somatic Tissue Preservation of Agouti (Dasyprocta leporina Linnaeus, 1758). Biopreserv Biobank 2020; 18:165-170. [DOI: 10.1089/bio.2019.0109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Cibelle A.S. Costa
- Laboratory of Animal Biotechnology, Federal Rural University of Semi-Arid, Mossoró, Brazil
| | - Alana A. Borges
- Laboratory of Animal Biotechnology, Federal Rural University of Semi-Arid, Mossoró, Brazil
| | - Matheus B. Nascimento
- Laboratory of Animal Biotechnology, Federal Rural University of Semi-Arid, Mossoró, Brazil
| | - Leonardo V.C. Aquino
- Laboratory of Animal Biotechnology, Federal Rural University of Semi-Arid, Mossoró, Brazil
| | - Alexandre R. Silva
- Laboratory of Animal Biotechnology, Federal Rural University of Semi-Arid, Mossoró, Brazil
| | - Moacir F. Oliveira
- Laboratory of Animal Biotechnology, Federal Rural University of Semi-Arid, Mossoró, Brazil
| | - Alexsandra F. Pereira
- Laboratory of Animal Biotechnology, Federal Rural University of Semi-Arid, Mossoró, Brazil
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24
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Advances in cartilage repair: The influence of inorganic clays to improve mechanical and healing properties of antibacterial Gellan gum-Manuka honey hydrogels. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 108:110444. [DOI: 10.1016/j.msec.2019.110444] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 10/31/2019] [Accepted: 11/15/2019] [Indexed: 12/15/2022]
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25
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Shardt N, Chen Z, Yuan SC, Wu K, Laouar L, Jomha NM, Elliott JAW. Using engineering models to shorten cryoprotectant loading time for the vitrification of articular cartilage. Cryobiology 2020; 92:180-188. [PMID: 31952947 DOI: 10.1016/j.cryobiol.2020.01.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 01/13/2020] [Indexed: 02/05/2023]
Abstract
Osteochondral allograft transplantation can treat full thickness cartilage and bone lesions in the knee and other joints, but the lack of widespread articular cartilage banking limits the quantity of cartilage available for size and contour matching. To address the limited availability of cartilage, vitrification can be used to store harvested joint tissues indefinitely. Our group's reported vitrification protocol [Biomaterials 33 (2012) 6061-6068] takes 9.5 h to load cryoprotectants into intact articular cartilage on bone and achieves high cell viability, but further optimization is needed to shorten this protocol for clinical use. Herein, we use engineering models to calculate the spatial and temporal distributions of cryoprotectant concentration, solution vitrifiability, and freezing point for each step of the 9.5-h protocol. We then incorporate the following major design choices for developing a new shorter protocol: (i) all cryoprotectant loading solution concentrations are reduced, (ii) glycerol is removed as a cryoprotectant, and (iii) an equilibration step is introduced to flatten the final cryoprotectant concentration profiles. We also use a new criterion-the spatially and temporally resolved prediction of solution vitrifiability-to assess whether a protocol will be successful instead of requiring that each cryoprotectant individually reaches a certain concentration. A total cryoprotectant loading time of 7 h is targeted, and our new 7-h protocol is predicted to achieve a level of vitrifiability comparable to the proven 9.5-h protocol throughout the cartilage thickness.
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Affiliation(s)
- Nadia Shardt
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, T6G 1H9, Canada
| | - Zhirong Chen
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, T6G 1H9, Canada
| | - Shuying Claire Yuan
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, T6G 1H9, Canada
| | - Kezhou Wu
- Department of Surgery, University of Alberta, Edmonton, T6G 2B7, Canada; Department of Orthopedic Surgery, First Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong, China
| | - Leila Laouar
- Department of Surgery, University of Alberta, Edmonton, T6G 2B7, Canada
| | - Nadr M Jomha
- Department of Surgery, University of Alberta, Edmonton, T6G 2B7, Canada
| | - Janet A W Elliott
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, T6G 1H9, Canada; Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, T6G 2R7, Canada.
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26
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Wu K, Shardt N, Laouar L, Chen Z, Prasad V, Elliott JAW, Jomha NM. Comparison of three multi-cryoprotectant loading protocols for vitrification of porcine articular cartilage. Cryobiology 2020; 92:151-160. [PMID: 31917159 DOI: 10.1016/j.cryobiol.2020.01.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 01/02/2020] [Indexed: 02/05/2023]
Abstract
Vitrification is a cryopreservation technique for the long-term storage of viable tissue, but the success of this technique relies on multiple factors. In 2012, our group published a working vitrification protocol for intact human articular cartilage and reported promising chondrocyte recovery after using a four-step multi-cryoprotectant (CPA) loading method that required 570 min. However, this protocol requires further optimization for clinical practice. Herein, we compared three multi-step CPA loading protocols to investigate their impact on chondrocyte recovery after vitrification of porcine articular cartilage on a bone base, including our previous four-step protocol (original: 570 min), and two shorter three-step protocols (optimized: 420 min, and minimally vitrifiable: 310 min). Four different CPAs were used including glycerol, dimethyl sulfoxide, ethylene glycol and propylene glycol. As vitrification containers, two conical tubes (50 ml and 15 ml) were evaluated for their heat transfer impact on chondrocyte recovery after vitrification. Osteochondral dowels were cored into two diameters of 10.0 mm and 6.9 mm with an approximately 10-mm thick bone base, and then allocated into the twelve experimental groups based on CPA loading protocol, osteochondral dowel size, and vitrification container size. After vitrification at -196 °C and tissue warming and CPA removal, samples in all groups were assessed for both chondrocyte viability and metabolic activity. The optimized protocol proposed based on mathematical modelling resulted in similar chondrocyte recovery to our original protocol and it was 150 min shorter. Furthermore, this study illustrated the role of CPA permeation (dowel size) and heat transfer (container size) on vitrification protocol outcome.
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Affiliation(s)
- Kezhou Wu
- Department of Surgery, University of Alberta, Edmonton, Alberta, Canada; Department of Orthopedic Surgery, First Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong, China
| | - Nadia Shardt
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada
| | - Leila Laouar
- Department of Surgery, University of Alberta, Edmonton, Alberta, Canada
| | - Zhirong Chen
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada
| | - Vinay Prasad
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada
| | - Janet A W Elliott
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada; Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - Nadr M Jomha
- Department of Surgery, University of Alberta, Edmonton, Alberta, Canada.
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27
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Numerical solution of inward solidification of a dilute ternary solution towards a semi-permeable spherical cell. Math Biosci 2019; 316:108240. [PMID: 31465730 DOI: 10.1016/j.mbs.2019.108240] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 04/09/2019] [Accepted: 08/22/2019] [Indexed: 11/23/2022]
Abstract
Modeling a cell's response to encroaching ice has informed the development of cryopreservation protocols for four decades. It has been well documented that knowledge of the cellular state as a function of media and cooling rate faciliate informed cryopreservation protocol design and explain mechanisms of damage. However, previous efforts have neglected the interaction between solutes and the encroaching ice front and their effects on the cell state. To address this, here we examine the cryobiologically relevant setting of a spherically-symmetric model of a biological cell separated by a ternary fluid mixture from an encroaching solid-liquid interface. The cell and liquid regions contain cell membrane impermeable intracellular and extracellular salts, respectively, a cell membrane permeable solute commonly used in cryopreservation protocols known as a cryoprotective agent (CPA), and water as a membrane permeable solvent. As cooling and solidification proceed the extracellular chemical environment evolves and leads to mass transport across the cell membrane. Consequently, both the solidification front and the cell membrane are free boundaries whose dynamics are coupled through transport processes in the solid, liquid and cell regions. We describe a numerical procedure to solve this coupled free-boundary problem based on a domain transformation and method of lines approach. We also investigate how the thermal and chemical states inside the cell are influenced by different cooling protocols at the external boundary. Finally, we observe that the previously unaccounted-for partial solute rejection at the advancing solid-liquid interface increases the CPA and salt concentrations in the extracellular liquid as a function of the interface speed and segregation coefficients, suggesting that previous model predictions of the cell state during cryopreservation were inaccurate.
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28
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Wu K, Laouar L, Dong R, Elliott JAW, Jomha NM. Evaluation of five additives to mitigate toxicity of cryoprotective agents on porcine chondrocytes. Cryobiology 2019; 88:98-105. [PMID: 30826335 DOI: 10.1016/j.cryobiol.2019.02.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 01/22/2019] [Accepted: 02/25/2019] [Indexed: 02/05/2023]
Abstract
Cryoprotective agents (CPAs) are used in cryopreservation protocols to achieve vitrification. However, the high CPA concentrations required to vitrify a tissue such as articular cartilage are a major drawback due to their cellular toxicity. Oxidation is one factor related to CPA toxicity to cells and tissues. Addition of antioxidants has proven to be beneficial to cell survival and cellular functions after cryopreservation. Investigation of additives for mitigating cellular CPA toxicity will aid in developing successful cryopreservation protocols. The current work shows that antioxidant additives can reduce the toxic effect of CPAs on porcine chondrocytes. Our findings showed that chondroitin sulphate, glucosamine, 2,3,5,6-tetramethylpyrazine and ascorbic acid improved chondrocyte cell survival after exposure to high concentrations of CPAs according to a live-dead cell viability assay. In addition, similar results were seen when additives were added during CPA removal and articular cartilage sample incubation post CPA exposure. Furthermore, we found that incubation of articular cartilage in the presence of additives for 2 days improved chondrocyte recovery compared with those incubated for 4 days. The current results indicated that the inclusion of antioxidant additives during exposure to high concentrations of CPAs is beneficial to chondrocyte survival and recovery in porcine articular cartilage and provided knowledge to improve vitrification protocols for tissue banking of articular cartilage.
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Affiliation(s)
- Kezhou Wu
- Department of Surgery, University of Alberta, Edmonton, Alberta, T6G 2B7, Canada; Department of Orthopaedic Surgery, First Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong, 515300, China
| | - Leila Laouar
- Department of Surgery, University of Alberta, Edmonton, Alberta, T6G 2B7, Canada
| | - Rachael Dong
- Department of Surgery, University of Alberta, Edmonton, Alberta, T6G 2B7, Canada
| | - Janet A W Elliott
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada; Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, T6G 2R7, Canada
| | - Nadr M Jomha
- Department of Surgery, University of Alberta, Edmonton, Alberta, T6G 2B7, Canada.
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29
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Vangsness CT, Higgs G, Hoffman JK, Farr J, Davidson PA, Milstein F, Geraghty S. Implantation of a Novel Cryopreserved Viable Osteochondral Allograft for Articular Cartilage Repair in the Knee. J Knee Surg 2018; 31:528-535. [PMID: 28738433 PMCID: PMC6053312 DOI: 10.1055/s-0037-1604138] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Restoration and repair of articular cartilage injuries remain a challenge for orthopaedic surgeons. The standard first-line treatment of articular cartilage lesions is marrow stimulation; however, this procedure can often result in the generation of fibrous repair cartilage rather than the biomechanically superior hyaline cartilage. Marrow stimulation is also often limited to smaller lesions, less than 2 cm2. Larger lesions may require implantation of a fresh osteochondal allograft, though a short shelf life, size-matched donor requirements, potential challenges of bone healing, limited availability, and the relatively high price limit the wide use of this therapeutic approach. We present a straightforward, single-stage surgical technique of a novel reparative and restorative approach for articular cartilage repair with the implantation of a cryopreserved viable osteochondral allograft (CVOCA). The CVOCA contains full-thickness articular cartilage and a thin layer of subchondral bone, and maintains the intact native cartilage architecture with viable chondrocytes, growth factors, and extracellular matrix proteins to promote articular cartilage repair. We report the results of a retrospective case series of three patients who presented with articular cartilage lesions more than 2 cm2 and were treated with the CVOCA using the presented surgical technique. Patients were followed up to 2 years after implantation of the CVOCA and all three patients had satisfactory outcomes without adverse events. Controlled randomized studies are suggested for evaluation of CVOCA efficacy, safety, and long-term outcomes.
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Affiliation(s)
- C. Thomas Vangsness
- Department of Orthopaedic Surgery, Keck School of Medicine, University of Southern California, Los Angeles, California,Address for correspondence C. Thomas Vangsness Jr., MD Department of Orthopaedic Surgery, University of Southern CaliforniaKeck School of Medicine, 1520 San Pablo St, Suite 2000, Los Angeles, CA 90033
| | - Geoffrey Higgs
- Department of Orthopaedic Surgery and Sports Medicine, OrthoCare Institute, Lumin Health, Plano, Texas
| | - James K. Hoffman
- Department of Orthopaedic Surgery, Coordinated Health, Bethlehem, Pennsylvania
| | - Jack Farr
- Cartilage Restoration Center of Indiana, OrthoIndy Hospital, Indianapolis, Indiana,Department of Orthopedic Surgery, Indiana University School of Medicine, Indianapolis, Indiana
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30
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Giwa S, Lewis JK, Alvarez L, Langer R, Roth AE, Church GM, Markmann JF, Sachs DH, Chandraker A, Wertheim JA, Rothblatt M, Boyden ES, Eidbo E, Lee WPA, Pomahac B, Brandacher G, Weinstock DM, Elliott G, Nelson D, Acker JP, Uygun K, Schmalz B, Weegman BP, Tocchio A, Fahy GM, Storey KB, Rubinsky B, Bischof J, Elliott JAW, Woodruff TK, Morris GJ, Demirci U, Brockbank KGM, Woods EJ, Ben RN, Baust JG, Gao D, Fuller B, Rabin Y, Kravitz DC, Taylor MJ, Toner M. The promise of organ and tissue preservation to transform medicine. Nat Biotechnol 2017; 35:530-542. [PMID: 28591112 PMCID: PMC5724041 DOI: 10.1038/nbt.3889] [Citation(s) in RCA: 298] [Impact Index Per Article: 42.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 04/28/2017] [Indexed: 02/06/2023]
Abstract
The ability to replace organs and tissues on demand could save or improve millions of lives each year globally and create public health benefits on par with curing cancer. Unmet needs for organ and tissue preservation place enormous logistical limitations on transplantation, regenerative medicine, drug discovery, and a variety of rapidly advancing areas spanning biomedicine. A growing coalition of researchers, clinicians, advocacy organizations, academic institutions, and other stakeholders has assembled to address the unmet need for preservation advances, outlining remaining challenges and identifying areas of underinvestment and untapped opportunities. Meanwhile, recent discoveries provide proofs of principle for breakthroughs in a family of research areas surrounding biopreservation. These developments indicate that a new paradigm, integrating multiple existing preservation approaches and new technologies that have flourished in the past 10 years, could transform preservation research. Capitalizing on these opportunities will require engagement across many research areas and stakeholder groups. A coordinated effort is needed to expedite preservation advances that can transform several areas of medicine and medical science.
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Affiliation(s)
- Sebastian Giwa
- Organ Preservation Alliance, NASA Research Park, Moffett Field, California, USA
- Sylvatica Biotech, Inc., Charleston, South Carolina, USA
- Ossium Health, San Francisco, California, USA
| | - Jedediah K Lewis
- Organ Preservation Alliance, NASA Research Park, Moffett Field, California, USA
| | - Luis Alvarez
- Regenerative Biology Research Group, Cancer and Developmental Biology Laboratory, National Cancer Institute, Bethesda, Maryland, USA
- Walter Reed National Military Medical Center, Bethesda, Maryland, USA
- Department of Chemistry and Life Science, United States Military Academy, West Point, New York, USA
| | - Robert Langer
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Alvin E Roth
- Department of Economics, Stanford University, Stanford, California, USA
| | - George M Church
- Department of Genetics, Harvard Medical School, Boston, Massachusetts, USA
| | - James F Markmann
- Division of Transplant Surgery, Department of Surgery, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - David H Sachs
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, New York, USA
| | - Anil Chandraker
- American Society of Transplantation, Mt. Laurel, New Jersey, USA
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Jason A Wertheim
- American Society of Transplant Surgeons, Arlington Virginia, USA
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | | | - Edward S Boyden
- MIT Media Lab and McGovern Institute, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Elling Eidbo
- Association of Organ Procurement Organizations, Vienna, Virginia, USA
| | - W P Andrew Lee
- Department of Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Bohdan Pomahac
- Department of Surgery, Division of Plastic Surgery, Brigham and Women's Hospital/Harvard Medical School, Boston, Massachusetts, USA
| | - Gerald Brandacher
- Department of Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - David M Weinstock
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts, USA
| | - Gloria Elliott
- Department of Mechanical Engineering and Engineering Science, University of North Carolina at Charlotte, Charlotte, North Carolina, USA
| | - David Nelson
- Department of Transplant Medicine, Nazih Zuhdi Transplant Institute, Integris Baptist Medical Center, Oklahoma City, Oklahoma, USA
| | - Jason P Acker
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
- Society for Cryobiology, Baltimore, Maryland, USA
| | - Korkut Uygun
- Department of Surgery, Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Boris Schmalz
- Organ Preservation Alliance, NASA Research Park, Moffett Field, California, USA
- Max Planck Institute of Psychiatry, Munich, Germany
| | - Brad P Weegman
- Organ Preservation Alliance, NASA Research Park, Moffett Field, California, USA
- Sylvatica Biotech, Inc., Charleston, South Carolina, USA
| | - Alessandro Tocchio
- Organ Preservation Alliance, NASA Research Park, Moffett Field, California, USA
- Department of Radiology, Stanford School of Medicine, Stanford, California, USA
| | - Greg M Fahy
- 21st Century Medicine, Fontana, California, USA
| | - Kenneth B Storey
- Institute of Biochemistry, Carleton University, Ottawa, Ontario, Canada
| | - Boris Rubinsky
- Department of Mechanical Engineering, University of California Berkeley, Berkeley, California, USA
| | - John Bischof
- Department of Mechanical Engineering, University of Minnesota, Minneapolis, Minnesota, USA
| | - Janet A W Elliott
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada
| | - Teresa K Woodruff
- Division of Obstetrics and Gynecology-Reproductive Science in Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | | | - Utkan Demirci
- Department of Radiology, Stanford School of Medicine, Stanford, California, USA
- Department of Electrical Engineering (by courtesy), Stanford, California, USA
| | | | - Erik J Woods
- Ossium Health, San Francisco, California, USA
- Society for Cryobiology, Baltimore, Maryland, USA
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Robert N Ben
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - John G Baust
- Department of Biological Sciences, Binghamton University, State University of New York, Binghamton, New York, USA
| | - Dayong Gao
- Society for Cryobiology, Baltimore, Maryland, USA
- Department of Mechanical Engineering, University of Washington, Seattle, Washington, USA
| | - Barry Fuller
- Division of Surgery &Interventional Science, University College Medical School, Royal Free Hospital Campus, London, UK
| | - Yoed Rabin
- Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania, USA
| | | | - Michael J Taylor
- Sylvatica Biotech, Inc., Charleston, South Carolina, USA
- Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania, USA
- Department of Surgery, University of Arizona, Tucson, Arizona, USA
| | - Mehmet Toner
- Department of Surgery, Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
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31
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Elliott GD, Wang S, Fuller BJ. Cryoprotectants: A review of the actions and applications of cryoprotective solutes that modulate cell recovery from ultra-low temperatures. Cryobiology 2017; 76:74-91. [DOI: 10.1016/j.cryobiol.2017.04.004] [Citation(s) in RCA: 180] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 04/07/2017] [Accepted: 04/16/2017] [Indexed: 02/08/2023]
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32
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Kilbride P, Morris GJ. Viscosities encountered during the cryopreservation of dimethyl sulphoxide systems. Cryobiology 2017; 76:92-97. [PMID: 28414045 DOI: 10.1016/j.cryobiol.2017.04.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2017] [Revised: 04/01/2017] [Accepted: 04/13/2017] [Indexed: 11/27/2022]
Abstract
This study determined the viscous conditions experienced by cells in the unfrozen freeze concentrated channels between ice crystals in slow cooling protocols. This was examined for both the binary Me2SO-water and the ternary Me2SO-NaCl-water systems. Viscosity increases from 6.9 ± 0.1 mPa s at -14.4 ± 0.3 °C to 958 ± 27 mPa s at -64.3 ± 0.4 °C in the binary system, and up to 55387 ± 1068 mPa s at -75 ± 0.5 °C in the ternary (10% Me2SO, 0.9% NaCl by weight) solution were seen. This increase in viscosity limits molecular diffusion, reducing adsorption onto the crystal plane. These viscosities are significantly lower than observed in glycerol based systems and so cells in freeze concentrated channels cooled to between -60 °C and -75 °C will reside in a thick fluid not a near-solid state as is often assumed. In addition, the viscosities experienced during cooling of various Me2SO based vitrification solutions is determined to below -70 °C, as is the impact which additional solutes exert on viscosity. These data show that additional solutes in a cryopreservation system cause disproportionate increases in viscosity. This in turn impacts diffusion rates and mixing abilities of high concentrations of cryoprotectants, and have applications to understanding the fundamental cooling responses of cells to Me2SO based cryopreservation solutions.
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Affiliation(s)
- P Kilbride
- Asymptote Ltd., St John's Innovation Centre, Cowley Road, Cambridge, CB4 0WS, United Kingdom.
| | - G J Morris
- Asymptote Ltd., St John's Innovation Centre, Cowley Road, Cambridge, CB4 0WS, United Kingdom
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33
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Conservation of somatic tissue derived from collared peccaries (Pecari tajacu Linnaeus, 1758) using direct or solid-surface vitrification techniques. Cytotechnology 2017; 69:643-654. [PMID: 28260212 DOI: 10.1007/s10616-017-0074-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Accepted: 12/16/2016] [Indexed: 12/11/2022] Open
Abstract
Cryopreservation of somatic tissue can be applied in biodiversity conservation, especially for wild species as collared peccary. We aimed to evaluate the effect of vitrification techniques of ear tissue of collared peccary [direct vitrification in cryovials (DVC) or solid-surface vitrification (SSV)] on the layers of epidermis and dermis by conventional histology and cell ability during the in vitro culture. Thus, both the vitrification methods were able to maintain normal patterns of the epidermis as the cornea and granular layers, furthermore the intercellular space and dermal-epidermal junction of the spinous layer when compared to fresh control. Nevertheless, DVC and SSV percentage of normality decreased in the morphological integrity of cytoplasm (37.5 and 25.0%) of spinous layer, respectively, as compared to the fresh fragments (100%, p < 0.05). Moreover, other differences between the fresh control (100%) and DVC tissues were verified in the intra-epidermal cleavage of the spinous (37.5%) and basal (37.5%) layers. In general, DVC and SSV techniques were efficient for the recovery of the somatic cells according to most of the evaluated parameters for the in vitro culture (p > 0.05). In addition, only at time of 72 h (D3), in the growth curve, DVC fragments showed a reduced cell concentration than fresh control. In conclusion, SSV was found to be a more efficient method for vitrifying collared peccary skin tissue when compared to DVC. These results are relevant for the tissue cryopreservation from collared peccary and could also be useful for mammals with phylogenetic relationships.
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Hahn J, Laouar L, Elliott JAW, Korbutt GS, Jomha NM. The effect of additive compounds on glycerol-induced damage to human chondrocytes. Cryobiology 2017; 75:68-74. [PMID: 28192075 DOI: 10.1016/j.cryobiol.2017.02.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 02/05/2017] [Accepted: 02/08/2017] [Indexed: 12/26/2022]
Abstract
High concentrations of cryoprotective agents are required for cryopreservation techniques such as vitrification. Glycerol is a common cryoprotective agent used in cryopreservation protocols but this agent is toxic at high concentrations. This work is an attempt to mitigate the toxic effects of high concentrations of glycerol on intact chondrocytes in human knee articular cartilage from total knee arthroplasty patients by simultaneous exposure to glycerol and a variety of additive compounds. The resulting cell viability in the cartilage samples as measured by membrane integrity staining showed that, in at least one concentration or in combination, all of the tested additive compounds (tetramethylpyrazine, ascorbic acid, chondroitin sulphate, glucosamine sulphate) were able to reduce the deleterious effects of glycerol exposure when examination of membrane integrity took place on a delayed time frame. The use of additive compounds to reduce cryoprotectant toxicity in articular cartilage may help improve cell recovery after cryopreservation.
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Affiliation(s)
- Joshua Hahn
- Department of Surgery, University of Alberta Hospital, 2D2.28 WMC, 8440-112St, Edmonton, Alberta T6G 2B7, Canada.
| | - Leila Laouar
- Department of Surgery, University of Alberta Hospital, 2D2.28 WMC, 8440-112St, Edmonton, Alberta T6G 2B7, Canada.
| | - Janet A W Elliott
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada; Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta T6G 2B7, Canada.
| | - Gregory S Korbutt
- Department of Surgery, University of Alberta Hospital, 2D2.28 WMC, 8440-112St, Edmonton, Alberta T6G 2B7, Canada.
| | - Nadr M Jomha
- Department of Surgery, University of Alberta Hospital, 2D2.28 WMC, 8440-112St, Edmonton, Alberta T6G 2B7, Canada.
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Broeren MGA, de Vries M, Bennink MB, van Lent PLEM, van der Kraan PM, Koenders MI, Thurlings RM, van de Loo FAJ. Functional Tissue Analysis Reveals Successful Cryopreservation of Human Osteoarthritic Synovium. PLoS One 2016; 11:e0167076. [PMID: 27870898 PMCID: PMC5117761 DOI: 10.1371/journal.pone.0167076] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 11/08/2016] [Indexed: 12/29/2022] Open
Abstract
Osteoarthritis (OA) is a degenerative joint disease affecting cartilage and is the most common form of arthritis worldwide. One third of OA patients have severe synovitis and less than 10% have no evidence of synovitis. Moreover, synovitis is predictive for more severe disease progression. This offers a target for therapy but more research on the pathophysiological processes in the synovial tissue of these patients is needed. Functional studies performed with synovial tissue will be more approachable when this material, that becomes available by joint replacement surgery, can be stored for later use. We set out to determine the consequences of slow-freezing of human OA synovial tissue. Therefore, we validated a method that can be applied in every routine laboratory and performed a comparative study of five cryoprotective agent (CPA) solutions. To determine possible deleterious cryopreservation-thaw effects on viability, the synovial tissue architecture, metabolic activity, RNA quality, expression of cryopreservation associated stress genes, and expression of OA characteristic disease genes was studied. Furthermore, the biological activity of the cryopreserved tissue was determined by measuring cytokine secretion induced by the TLR ligands lipopolysaccharides and Pam3Cys. Compared to non frozen synovium, no difference in cell and tissue morphology could be identified in the conditions using the CS10, standard and CryoSFM CPA solution for cryopreservation. However, we observed significantly lower preservation of tissue morphology with the Biofreeze and CS2 media. The other viability assays showed trends in the same direction but were not sensitive enough to detect significant differences between conditions. In all assays tested a clearly lower viability was detected in the condition in which synovium was frozen without CPA solution. This detailed analysis showed that OA synovial tissue explants can be cryopreserved while maintaining the morphology, viability and phenotypical response after thawing, offering enhanced opportunities for human in vitro studies.
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Affiliation(s)
- Mathijs G. A. Broeren
- Experimental Rheumatology, Department of Rheumatology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Marieke de Vries
- Experimental Rheumatology, Department of Rheumatology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Miranda B. Bennink
- Experimental Rheumatology, Department of Rheumatology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Peter L. E. M. van Lent
- Experimental Rheumatology, Department of Rheumatology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Peter M. van der Kraan
- Experimental Rheumatology, Department of Rheumatology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Marije I. Koenders
- Experimental Rheumatology, Department of Rheumatology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Rogier M. Thurlings
- Experimental Rheumatology, Department of Rheumatology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Fons A. J. van de Loo
- Experimental Rheumatology, Department of Rheumatology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, the Netherlands
- * E-mail:
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Hiemer B, Genz B, Jonitz-Heincke A, Pasold J, Wree A, Dommerich S, Bader R. Devitalisation of human cartilage by high hydrostatic pressure treatment: Subsequent cultivation of chondrocytes and mesenchymal stem cells on the devitalised tissue. Sci Rep 2016; 6:33747. [PMID: 27671122 PMCID: PMC5037397 DOI: 10.1038/srep33747] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 08/31/2016] [Indexed: 01/08/2023] Open
Abstract
The regeneration of cartilage lesions still represents a major challenge. Cartilage has a tissue-specific architecture, complicating recreation by synthetic biomaterials. A novel approach for reconstruction is the use of devitalised cartilage. Treatment with high hydrostatic pressure (HHP) achieves devitalisation while biomechanical properties are remained. Therefore, in the present study, cartilage was devitalised using HHP treatment and the potential for revitalisation with chondrocytes and mesenchymal stem cells (MSCs) was investigated. The devitalisation of cartilage was performed by application of 480 MPa over 10 minutes. Effective cellular inactivation was demonstrated by the trypan blue exclusion test and DNA quantification. Histology and electron microscopy examinations showed undamaged cartilage structure after HHP treatment. For revitalisation chondrocytes and MSCs were cultured on devitalised cartilage without supplementation of chondrogenic growth factors. Both chondrocytes and MSCs significantly increased expression of cartilage-specific genes. ECM stainings showed neocartilage-like structure with positive AZAN staining as well as collagen type II and aggrecan deposition after three weeks of cultivation. Our results showed that HHP treatment caused devitalisation of cartilage tissue. ECM proteins were not influenced, thus, providing a scaffold for chondrogenic differentiation of MSCs and chondrocytes. Therefore, using HHP-treated tissue might be a promising approach for cartilage repair.
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Affiliation(s)
- B. Hiemer
- Rostock University Medical Center, Department of Orthopaedics, Biomechanics and Implant Technology Research Laboratory, Doberaner Strasse 142, 18057 Rostock, Germany
| | - B. Genz
- Rostock University Medical Center, Department of Otorhinolaryngology, Doberaner Strasse 137–139, 18057 Rostock, Germany
| | - A. Jonitz-Heincke
- Rostock University Medical Center, Department of Orthopaedics, Biomechanics and Implant Technology Research Laboratory, Doberaner Strasse 142, 18057 Rostock, Germany
| | - J. Pasold
- Rostock University Medical Center, Department of Orthopaedics, Biomechanics and Implant Technology Research Laboratory, Doberaner Strasse 142, 18057 Rostock, Germany
| | - A. Wree
- Rostock University Medical Center, Department of Anatomy, Gertrudenstraße 9, 18057 Rostock, Germany
| | - S. Dommerich
- Charité Berlin University Medical Center, Department of Otorhinolaryngology, Chariteplatz 1, 10117 Berlin, Germany
| | - R. Bader
- Rostock University Medical Center, Department of Orthopaedics, Biomechanics and Implant Technology Research Laboratory, Doberaner Strasse 142, 18057 Rostock, Germany
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Shardt N, Al-Abbasi KK, Yu H, Jomha NM, McGann LE, Elliott JAW. Cryoprotectant kinetic analysis of a human articular cartilage vitrification protocol. Cryobiology 2016; 73:80-92. [PMID: 27221520 DOI: 10.1016/j.cryobiol.2016.05.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 05/19/2016] [Accepted: 05/20/2016] [Indexed: 11/17/2022]
Abstract
We recently published a protocol to vitrify human articular cartilage and a method of cryoprotectant removal in preparation for transplantation. The current study's goal was to perform a cryoprotectant kinetic analysis and theoretically shorten the procedure used to vitrify human articular cartilage. First, the loading of the cryoprotectants was modeled using Fick's law of diffusion, and this information was used to predict the kinetics of cryoprotectant efflux after the cartilage sample had been warmed. We hypothesized that diffusion coefficients obtained from the permeation of individual cryoprotectants into porcine articular cartilage could be used to provide a reasonable prediction of the cryoprotectant loading and of the combined cryoprotectant efflux from vitrified human articular cartilage. We tested this hypothesis with experimental efflux measurements. Osteochondral dowels from three patients were vitrified, and after warming, the articular cartilage was immersed in 3 mL X-VIVO at 4 °C in two consecutive solutions, each for 24 h, with the solution osmolality recorded at various times. Measured equilibrium values agreed with theoretical values within a maximum of 15% for all three samples. The results showed that diffusion coefficients for individual cryoprotectants determined from experiments with 2-mm thick porcine cartilage can be used to approximate the rate of efflux of the combined cryoprotectants from vitrified human articular cartilage of similar thickness. Finally, Fick's law of diffusion was used in a computational optimization to shorten the protocol with the constraint of maintaining the theoretical minimum cryoprotectant concentration needed to achieve vitrification. The learning provided by this study will enable future improvements in tissue vitrification.
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Affiliation(s)
- Nadia Shardt
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton T6G 1H9, Canada
| | | | - Hana Yu
- Department of Surgery, University of Alberta, Edmonton T6G 2B7, Canada
| | - Nadr M Jomha
- Department of Surgery, University of Alberta, Edmonton T6G 2B7, Canada
| | - Locksley E McGann
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton T6G 2R7, Canada
| | - Janet A W Elliott
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton T6G 1H9, Canada; Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton T6G 2R7, Canada.
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Mickevicius T, Pockevicius A, Kucinskas A, Gudas R, Maciulaitis J, Noreikaite A, Usas A. Impact of storage conditions on electromechanical, histological and histochemical properties of osteochondral allografts. BMC Musculoskelet Disord 2015; 16:314. [PMID: 26497227 PMCID: PMC4619008 DOI: 10.1186/s12891-015-0776-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Accepted: 10/15/2015] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Osteochondral allograft transplantation has a good clinical outcome, however, there is still debate on optimization of allograft storage protocol. Storage temperature and nutrient medium composition are the most critical factors for sustained biological activity of grafts before implantation. In this study, we performed a time-dependent in vitro experiment to investigate the effect of various storage conditions on electromechanical, histological and histochemical properties of articular cartilage. METHODS Osteochondral grafts derived from goat femoral condyles were frozen at -70 °C or stored at 4 °C and 37 °C in the medium supplemented with or without insulin-like growth factor-1 (IGF-1). After 14 and 28 days the cartilage samples were quantitatively analysed for electromechanical properties, glycosaminoglycan distribution, histological structure, chondrocyte viability and apoptosis. The results were compared between the experimental groups and correlations among different evaluation methods were determined. RESULTS Storage at -70 °C and 37 °C significantly deteriorated cartilage electromechanical, histological and histochemical properties. Storage at 4 °C maintained the electromechanical quantitative parameter (QP) and glycosaminoglycan expression near the normal levels for 14 days. Although hypothermic storage revealed reduced chondrocyte viability and increased apoptosis, these parameters were superior compared with the storage at -70 °C and 37 °C. IGF-1 supplementation improved the electromechanical QP, chondrocyte viability and histological properties at 37 °C, but the effect lasted only 14 days. Electromechanical properties correlated with the histological grading score (r = 0.673, p < 0.001), chondrocyte viability (r = -0.654, p < 0.001) and apoptosis (r = 0.416, p < 0.02). In addition, apoptosis correlated with glycosaminoglycan distribution (r = -0.644, p < 0.001) and the histological grading score (r = 0.493, p = 0.006). CONCLUSIONS Our results indicate that quality of allografts is better preserved at currently established 4 °C storage temperature. Storage at -70 °C or at 37 °C is unable to maintain cartilage function and metabolic activity. IGF-1 supplementation at 37 °C can enhance chondrocyte viability and improve electromechanical and histological properties of the cartilage, but the impact persists only 14 days. The correlations between cartilage electromechanical quantitative parameter (QP) and metabolic activity were detected. Our findings indicate that non-destructive assessment of cartilage by Arthro-BST is a simple and reliable method to evaluate allograft quality, and could be routinely used before implantation.
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Affiliation(s)
- Tomas Mickevicius
- Department of Orthopaedics and Traumatology, Hospital of Lithuanian University of Health Sciences Kaunas Clinics, Kaunas, Lithuania
| | - Alius Pockevicius
- Pathology Center, Department of Infectious Diseases, Veterinary Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Audrius Kucinskas
- Large Animal Clinic, Veterinary Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Rimtautas Gudas
- Department of Orthopaedics and Traumatology, Hospital of Lithuanian University of Health Sciences Kaunas Clinics, Kaunas, Lithuania
- Institute of Sports, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Justinas Maciulaitis
- Department of Orthopaedics and Traumatology, Hospital of Lithuanian University of Health Sciences Kaunas Clinics, Kaunas, Lithuania
- Institute of Sports, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Aurelija Noreikaite
- Institute of Physiology and Pharmacology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Arvydas Usas
- Institute of Physiology and Pharmacology, Lithuanian University of Health Sciences, Kaunas, Lithuania.
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Abstract
High levels of penetrating cryoprotectants (CPAs) can eliminate ice formation during cryopreservation of cells, tissues, and organs to cryogenic temperatures. But CPAs become increasingly toxic as concentration increases. Many strategies have been attempted to overcome the problem of eliminating ice while minimizing toxicity, such as attempting to optimize cooling and warming rates, or attempting to optimize time of adding individual CPAs during cooling. Because strategies currently used are not adequate, CPA toxicity remains the greatest obstacle to cryopreservation. CPA toxicity stands in the way of cryogenic cryopreservation of human organs, a procedure that has the potential to save many lives. This review attempts to describe what is known about CPA toxicity, theories of CPA toxicity, and strategies to reduce CPA toxicity. Critical analysis and suggestions are also included.
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Li S, Yang X, Tang S, Zhang X, Feng Z, Cui S. Repair of massively defected hemi-joints using demineralized osteoarticular allografts with protected cartilage. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:227. [PMID: 26319778 DOI: 10.1007/s10856-015-5557-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Accepted: 08/06/2015] [Indexed: 06/04/2023]
Abstract
Surgical replacement of massively defected joints necessarily relies on osteochondral grafts effective to both of bone and cartilage. Demineralized bone matrix (DBM) retains the osteoconductivity but destroys viable chondrocytes in the cartilage portion essential for successful restoration of defected joints. This study prepared osteochondral grafts of DBM with protected cartilage. Protected cartilage portions was characterized by cellular and molecular biology and the grafts were allogenically used for grafting. Protected cartilage showed similar histomorphological structure and protected proteins estimated by total proteins and cartilage specific proteins as in those of fresh controls when DBMs were generated in bone portions. Such grafts were successfully used for simultaneously repair of bone and cartilage in massively defected osteoarticular joints within 16 weeks post-surgery. These results present an allograft with clinical potential for simultaneous restoration of bone and cartilage in defected joints.
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Affiliation(s)
- Siming Li
- Guangzhou Institute of Traumatic Surgery, The Fourth Affiliated Hospital, Jinan University School of Medicine, 396 Tongfu Zhonglu Road, Haizhu District, Guangzhou, 510220, Guangdong Province, People's Republic of China,
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Weng L, Elliott GD. Dynamic and thermodynamic characteristics associated with the glass transition of amorphous trehalose-water mixtures. Phys Chem Chem Phys 2015; 16:11555-65. [PMID: 24803351 DOI: 10.1039/c3cp55418j] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The glass transition temperature Tg of biopreservative formulations is important for predicting the long-term storage of biological specimens. As a complementary tool to thermal analysis techniques, which are the mainstay for determining Tg, molecular dynamics simulations have been successfully applied to predict the Tg of several protectants and their mixtures with water. These molecular analyses, however, rarely focused on the glass transition behavior of aqueous trehalose solutions, a subject that has attracted wide scientific attention via experimental approaches. Important behavior, such as hydrogen-bonding dynamics and self-aggregation has yet to be explored in detail, particularly below, or in the vicinity of, Tg. Using molecular dynamics simulations of several dynamic and thermodynamic properties, this study reproduced the supplemented phase diagram of trehalose-water mixtures (i.e., Tg as a function of the solution composition) based on experimental data. The structure and dynamics of the hydrogen-bonding network in the trehalose-water systems were also analyzed. The hydrogen-bonding lifetime was determined to be an order of magnitude higher in the glassy state than in the liquid state, while the constitution of the hydrogen-bonding network exhibited no noticeable change through the glass transition. It was also found that trehalose molecules preferred to form small, scattered clusters above Tg, but self-aggregation was substantially increased below Tg. The average cluster size in the glassy state was observed to be dependent on the trehalose concentration. Our findings provided insights into the glass transition characteristics of aqueous trehalose solutions as they relate to biopreservation.
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Affiliation(s)
- Lindong Weng
- Department of Mechanical Engineering and Engineering Sciences, University of North Carolina at Charlotte, Charlotte, NC 28223, U.S.A.
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Grondin M, Chow-Shi-Yée M, Ouellet F, Averill-Bates DA. Wheat enolase demonstrates potential as a non-toxic cryopreservation agent for liver and pancreatic cells. Biotechnol J 2015; 10:801-10. [DOI: 10.1002/biot.201400562] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 01/28/2015] [Accepted: 03/04/2015] [Indexed: 11/08/2022]
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Approaches to preserve human osteochondral allografts. Cell Tissue Bank 2014; 16:425-31. [PMID: 25479814 DOI: 10.1007/s10561-014-9486-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Accepted: 12/02/2014] [Indexed: 10/24/2022]
Abstract
Osteochondral defects may progress to osteoarthritis. Many attempts have been developed to overcome this issue, including osteochondral autografts and allografts. The goal of this study was to develop a new protocol for storage of human osteochondral allografts. Osteochondral plugs were randomly allocated in the following groups: control, immediate freezing up to -70 °C, cooling at 4 °C, and storage at 37 °C. Samples from the cooling at 4 °C and storage at 37 °C groups were stored in tubes containing medium plus human albumin and analyzed after 1, 3, and 14 days. The frozen groups' samples were cryopreserved for 1 year in cryotubes containing medium only (FM), medium plus human albumin (FA), and medium plus human albumin and glucose (FG) and were then analyzed. Analysis involved histological study with hematoxylin-eosin and Safranin O and a modified Live/Dead assay. In samples stored both at 37 and 4 °C, analysis showed statistically significant higher cellular mortality at 14 days compared to 1 and 3 days, but mortality in the 4 °C group was lower. In the freezing protocols, the FA group showed less cellular mortality than the FM and FG groups. Cooling at 4 °C offers better preservation capacity than storage at 37 °C, but both offer the capacity for preservation for 14 days. Adding human albumin to the storage medium is useful in reducing cellular mortality in samples frozen for 1 year.
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Kim B, Nam B, Lee K, Jo Y, Nemeno J, Yang W, Lee S, Kim H, Jang I, Takebe T, Lee J. Effect of Preservation Conditions on Cartilage Tissue for Cell Transplantation. Transplant Proc 2014; 46:1139-44. [DOI: 10.1016/j.transproceed.2013.11.125] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Accepted: 11/07/2013] [Indexed: 10/25/2022]
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Chen JL, Duan L, Zhu W, Xiong J, Wang D. Extracellular matrix production in vitro in cartilage tissue engineering. J Transl Med 2014; 12:88. [PMID: 24708713 PMCID: PMC4233628 DOI: 10.1186/1479-5876-12-88] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Accepted: 03/31/2014] [Indexed: 11/18/2022] Open
Abstract
Cartilage tissue engineering is arising as a technique for the repair of cartilage lesions in clinical applications. However, fibrocartilage formation weakened the mechanical functions of the articular, which compromises the clinical outcomes. Due to the low proliferation ability, dedifferentiation property and low production of cartilage-specific extracellular matrix (ECM) of the chondrocytes, the cartilage synthesis in vitro has been one of the major limitations for obtaining high-quality engineered cartilage constructs. This review discusses cells, biomaterial scaffolds and stimulating factors that can facilitate the cartilage-specific ECM production and accumulation in the in vitro culture system. Special emphasis has been put on the factors that affect the production of ECM macromolecules such as collagen type II and proteoglycans in the review, aiming at providing new strategies to improve the quality of tissue-engineered cartilage.
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Affiliation(s)
| | | | | | | | - Daping Wang
- Shenzhen Key Laboratory of Tissue Engineering, Shenzhen Second People's Hospital (The First Affiliated Hospital of Shenzhen University), Shenzhen 518035, Guangdong Province, China.
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Ménard AL, Soulisse C, Raymond P, Londono I, Villemure I. Effect of Cold Storage and Freezing on the Biomechanical Properties of Swine Growth Plate Explants. J Biomech Eng 2014; 136:1789869. [DOI: 10.1115/1.4026231] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Accepted: 12/13/2013] [Indexed: 11/08/2022]
Abstract
Ex vivo biomechanical testing of growth plate samples provides essential information about its structural and physiological characteristics. Experimental limitations include the preservation of the samples since working with fresh tissues involves significant time and transportation costs. Little information is available on the storage of growth plate explants. The aim of this study was to determine storage conditions that could preserve growth plate biomechanical properties. Porcine ulnar growth plate explants (n = 5 per condition) were stored at either 4 °C for periods of 1, 2, 3, and 6 days or frozen at −20 °C with slow or rapid sample thawing. Samples were tested using stress relaxation tests under unconfined compression to assess five biomechanical parameters. The maximum compressive stress (σmax) and the equilibrium stress (σeq) were directly extracted from the experimental curves, while the fibril-network reinforced biphasic model was used to obtain the matrix modulus (Em), the fibril modulus (Ef), and the permeability (k). No significant changes were observed in σeq and Em in any of the tested storage conditions. Significant decreases and increases, respectively, were observed in σmax and k in the growth plate samples refrigerated for more than 48 h and in the frozen samples, when compared with the fresh samples. The fibril modulus Ef of all stored samples was significantly reduced compared to the fresh samples. These results indicate that the storage of growth plates in a humid chamber at 4 °C for a maximum of 48 h is the condition that minimizes the effects on the measured biomechanical parameters, with only Ef significantly reduced. Refrigerating growth plate explants for less than 48 h maintains their maximal stress, equilibrium stress, matrix modulus, and permeability. However, cold storage at 4 °C for more than 48 h and freezing storage at −20 °C significantly alter the biomechanical response of growth plate samples. Appropriate growth plate sample storage will be beneficial to save time and reduce transportation costs to pick up fresh samples.
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Affiliation(s)
- Anne-Laure Ménard
- Dept. of Mechanical Engineering, École Polytechnique of Montreal, P.O. Box 6079, Station “Centre-Ville,” Montréal, Québec H3C 3A7, Canada
- Sainte-Justine University Hospital Center, 3175 Côte-Ste-Catherine Road, Montréal, Québec H3T 1C5, Canada e-mail:
| | - Candice Soulisse
- Dept. of Mechanical Engineering, École Polytechnique of Montreal, P.O. Box 6079, Station “Centre-Ville,” Montréal, Québec H3C 3A7, Canada
- Sainte-Justine University Hospital Center, 3175 Côte-Ste-Catherine Road, Montréal, Québec H3T 1C5, Canada e-mail:
| | - Pascale Raymond
- Dept. of Mechanical Engineering, École Polytechnique of Montreal, P.O. Box 6079, Station “Centre-Ville,” Montréal, Québec H3C 3A7, Canada
- Sainte-Justine University Hospital Center, 3175 Côte-Ste-Catherine Road, Montréal, Québec H3T 1C5, Canada e-mail:
| | - Irène Londono
- Sainte-Justine University Hospital Center, 3175 Côte-Ste-Catherine Road, Montréal, Québec H3T 1C5, Canada e-mail:
| | - Isabelle Villemure
- Dept. of Mechanical Engineering, École Polytechnique of Montreal, P.O. Box 6079, Station “Centre-Ville,” Montréal, Québec H3C 3A7, Canada
- Sainte-Justine University Hospital Center, 3175 Côte-Ste-Catherine Road, Montréal, Québec H3T 1C5, Canada e-mail:
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