1
|
Du XX, Todorov P, Isachenko E, Sanchez R, Uribe P, Rahimi G, Mallmann P, Isachenko V. Model of micro-metastases of breast cancer cells in ovarian tissue: Cryopreservation of ZR-75-1 and MDA-MB-231 cells with increased speed of warming increases malignancy. Cryobiology 2024; 116:104910. [PMID: 38777075 DOI: 10.1016/j.cryobiol.2024.104910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 04/16/2024] [Accepted: 05/19/2024] [Indexed: 05/25/2024]
Abstract
In medicine, ovarian tissue cryopreservation exists for fertility preservation of cancer patients. In fact, ovarian tissue frozen for subsequent thawing and re-transplantation can be contaminated with cancer cells. Therefore, investigations on the effect of cryopreservation on the post-thawed viability of such cells are relevant. Speed of warming is a key parameter of cell cryopreservation. However, the data about comparative viability of cancer cells cryopreserved with different parameters of warming are limited. The aim of our investigations was to assess the malignancy of cryopreserved cancer cells after conventional cooling followed by relatively slow and quick speed of warming. In vitro cultured breast cancer cells of lines ZR-75-1 and MD0MD-231 in form of compacted fragments (as a model of solid tumors) were frozen following a protocol usually used for freezing of ovarian tissue (6 % ethylene glycol+6 % glycerol+0.15 M sucrose, -0.3 °C/min). Cells were warmed by two routine regimes of warming: at 37 °C ("slow" warming) and 100 °C ("quick" warming). Biological properties of cells were investigated: viability, proliferation rate, 2D- and 3D-migration, transmembrane movement and invasion. Quick warming at 100 °C in comparison with slow warming at 37 °C exhibited significantly higher cell survival for MDA-MB-231 cells: 70.1 % vs. 63.2 % and for ZR-75-1 86.8 % vs. 82.9 %, respectively. The cell motility including 2D movement and 3D transmembrane migration were higher after quick thawing at 100 °C. Invasive abilities of cells after cryopreservation were higher than that of fresh (non-treated cells). Both thawing regimes showed a similar rate of cell proliferation. Cryopreservation procedures, and especially this one with quick thawing, increase malignancy of ZR-75-1 and MDA-MB-231 breast cancer cells and risk of metastasis.
Collapse
Affiliation(s)
- Xin-Xin Du
- Research Group for Reproductive Medicine, IVF-Laboratory and Department of Gynecology, Medical Faculty, University of Cologne, Cologne, Germany.
| | - Plamen Todorov
- Institute of Biology and Immunology of Reproduction, Bulgarian Academy of Sciences (BAS), Sofia, Bulgaria.
| | - Evgenia Isachenko
- Research Group for Reproductive Medicine, IVF-Laboratory and Department of Gynecology, Medical Faculty, University of Cologne, Cologne, Germany.
| | - Raul Sanchez
- Temuco University de la Frontera, Temuco, Chile.
| | - Pamela Uribe
- Temuco University de la Frontera, Temuco, Chile.
| | - Gohar Rahimi
- Research Group for Reproductive Medicine, IVF-Laboratory and Department of Gynecology, Medical Faculty, University of Cologne, Cologne, Germany; Medizinisches Versorgungszentrum AMEDES für IVF- und Pränatalmedizin in Köln GmbH, Cologne, Germany.
| | - Peter Mallmann
- Research Group for Reproductive Medicine, IVF-Laboratory and Department of Gynecology, Medical Faculty, University of Cologne, Cologne, Germany.
| | - Volodimir Isachenko
- Research Group for Reproductive Medicine, IVF-Laboratory and Department of Gynecology, Medical Faculty, University of Cologne, Cologne, Germany.
| |
Collapse
|
2
|
Deck LT, Shardt N, El-Bakouri I, Isenrich FN, Marcolli C, deMello AJ, Mazzotti M. Monitoring Aqueous Sucrose Solutions Using Droplet Microfluidics: Ice Nucleation, Growth, Glass Transition, and Melting. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:6304-6316. [PMID: 38494636 DOI: 10.1021/acs.langmuir.3c03798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
Freezing and freeze-drying processes are commonly used to extend the shelf life of drug products and to ensure their safety and efficacy upon use. When designing a freezing process, it is beneficial to characterize multiple physicochemical properties of the formulation, such as nucleation rate, crystal growth rate, temperature and concentration of the maximally freeze-concentrated solution, and melting point. Differential scanning calorimetry has predominantly been used in this context but does have practical limitations and is unable to quantify the kinetics of crystal growth and nucleation. In this work, we introduce a microfluidic technique capable of quantifying the properties of interest and use it to investigate aqueous sucrose solutions of varying concentration. Three freeze-thaw cycles were performed on droplets with 75-μm diameters at cooling and warming rates of 1 °C/min. During each cycle, the visual appearance of the droplets was optically monitored as they experienced nucleation, crystal growth, formation of the maximally freeze-concentrated solution, and melting. Nucleation and crystal growth manifested as increases in droplet brightness during the cooling phase. Heating was associated with a further increase as the temperature associated with the maximally freeze-concentrated solution was approached. Heating beyond the melting point corresponded to a decrease in brightness. Comparison with the literature confirmed the accuracy of the new technique while offering new visual data on the maximally freeze-concentrated solution. Thus, the microfluidic technique presented here may serve as a complement to differential scanning calorimetry in the context of freezing and freeze-drying. In the future, it could be applied to a plethora of mixtures that undergo such processing, whether in pharmaceutics, food production, or beyond.
Collapse
Affiliation(s)
- Leif-Thore Deck
- Institute of Energy and Process Engineering, ETH Zurich, Zurich 8092, Switzerland
| | - Nadia Shardt
- Institute for Atmospheric and Climate Science, ETH Zurich, Zurich 8092, Switzerland
- Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), Trondheim 7491, Norway
| | - Imad El-Bakouri
- Institute of Energy and Process Engineering, ETH Zurich, Zurich 8092, Switzerland
| | - Florin N Isenrich
- Institute for Chemical and Bioengineering, ETH Zurich, Zurich 8092, Switzerland
| | - Claudia Marcolli
- Institute for Atmospheric and Climate Science, ETH Zurich, Zurich 8092, Switzerland
| | - Andrew J deMello
- Institute for Chemical and Bioengineering, ETH Zurich, Zurich 8092, Switzerland
| | - Marco Mazzotti
- Institute of Energy and Process Engineering, ETH Zurich, Zurich 8092, Switzerland
| |
Collapse
|
3
|
Ashrafi E, Sauvageau D, Elliott JW. Effects of different cryopreservation parameters on the differences between trypan blue and fluorescent SYTO 13/GelRed assays. Cryobiology 2024:104883. [PMID: 38452848 DOI: 10.1016/j.cryobiol.2024.104883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 01/30/2024] [Accepted: 03/05/2024] [Indexed: 03/09/2024]
Abstract
Post-thaw cell viability assessment is very important in cryopreservation because it is the main assessment method used to optimize the cryopreservation protocols for each cell type; hence, having standardized accurate, quick, and reliable assays for post-thaw cell viability measurements is of utmost importance. The trypan blue exclusion assay and nucleic-acid-binding fluorescence-based assays are two different methods for cell viability assessment. Both assays identify cells with damaged membranes by whether they let a compound enter the cell. In this study, these two assays are compared in the context of cryopreservation and the impacts of important cryopreservation parameters on the differences in measurements are investigated. H9c2 myoblasts were cryopreserved with different freezing protocols. Cell membrane integrities were measured immediately after thaw as well as after cryoprotectant removal by a hemocytometer-based trypan blue dye exclusion assay and a dual fluorometric SYTO 13/GelRed assay; and the results were compared. This study quantifies how i) the absence or presence of different cryoprotectants, ii) different cell-cryoprotectant incubation conditions, and iii) the presence or removal of cryoprotectants after thaw affect the differences between these two viability assays.
Collapse
Affiliation(s)
- Elham Ashrafi
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, Canada
| | - Dominic Sauvageau
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, Canada
| | - JanetA 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.
| |
Collapse
|
4
|
Pakhomov O, Shevchenko N, Chernobai N, Prokopiuk V, Yershov S, Bozhok G. Open-source hardware- and software-based cryomicroscopy system for investigation of phase transitions in cryobiological research. J Microsc 2024; 293:71-85. [PMID: 38093667 DOI: 10.1111/jmi.13253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 11/08/2023] [Accepted: 12/11/2023] [Indexed: 12/20/2023]
Abstract
The development of inexpensive equipment adapted for the study of a specific biological object is very important for cryobiology. In the presented work, we have proposed a simple system for microscopy utilising open-source platform Arduino. Testing this system showed that it had sufficient sensitivity to determine the physical processes occurring in a cryopreserved sample such as intra- and extracellular water crystallisation and salt eutectic. Utilising this system, we investigated the mechanisms of cryoprotection and cryodamage of testis interstitial cells (ICs) in cryoprotective media, which included cryoprotective agents such as dimethyl sulphoxide (Me2 SO), as well as foetal bovine serum or polymers (dextran, hydroxyethyl starch and polyethylene glycol). It was shown that a serum-/xeno-free medium that included 0.7 M Me2 SO and 100 mg/mL dextran was able to reduce intracellular water crystallisation in cells, change the structure of extracellular ice, and reduce salt eutectic and recrystallisation. All these effects correlated with better IC survival after cryopreservation in the medium. This medium is potentially less toxic as it has lower concentrations of Me2 SO compared to serum-containing media developed for cryopreservation of testicular cells. This would pave a way for the creation of nontoxic serum-free compositions that does not require removal before use of cryopreserved living cells for laboratory practice or in clinics.
Collapse
Affiliation(s)
- Oleksandr Pakhomov
- Department of Cryoendocrinology, Institute for Problems of Cryobiology and Cryomedicine, National Academy of Sciences of Ukraine, Kharkiv, Ukraine
| | - Nadiia Shevchenko
- Department of Cryoendocrinology, Institute for Problems of Cryobiology and Cryomedicine, National Academy of Sciences of Ukraine, Kharkiv, Ukraine
| | - Nadiia Chernobai
- Department of Cryoendocrinology, Institute for Problems of Cryobiology and Cryomedicine, National Academy of Sciences of Ukraine, Kharkiv, Ukraine
| | - Volodymyr Prokopiuk
- Department of Cryoendocrinology, Institute for Problems of Cryobiology and Cryomedicine, National Academy of Sciences of Ukraine, Kharkiv, Ukraine
| | - Serhii Yershov
- Department of Cryoendocrinology, Institute for Problems of Cryobiology and Cryomedicine, National Academy of Sciences of Ukraine, Kharkiv, Ukraine
| | - Galyna Bozhok
- Department of Cryoendocrinology, Institute for Problems of Cryobiology and Cryomedicine, National Academy of Sciences of Ukraine, Kharkiv, Ukraine
| |
Collapse
|
5
|
Pei C, Todorov P, Cao M, Kong Q, Isachenko E, Rahimi G, Mallmann-Gottschalk N, Uribe P, Sanchez R, Isachenko V. Comparative Transcriptomic Analyses for the Optimization of Thawing Regimes during Conventional Cryopreservation of Mature and Immature Human Testicular Tissue. Int J Mol Sci 2023; 25:214. [PMID: 38203385 PMCID: PMC10778995 DOI: 10.3390/ijms25010214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 12/15/2023] [Accepted: 12/19/2023] [Indexed: 01/12/2024] Open
Abstract
Cryopreservation of human testicular tissue, as a key element of anticancer therapy, includes the following stages: saturation with cryoprotectants, freezing, thawing, and removal of cryoprotectants. According to the point of view existing in "classical" cryobiology, the thawing mode is the most important consideration in the entire process of cryopreservation of any type of cells, including cells of testicular tissue. The existing postulate in cryobiology states that any frozen types of cells must be thawed as quickly as possible. The technologically maximum possible thawing temperature is 100 °C, which is used in our technology for the cryopreservation of testicular tissue. However, there are other points of view on the rate of cell thawing, according to how thawing should be carried out at physiological temperatures. In fact, there are morphological and functional differences between immature (from prepubertal patients) and mature testicular tissue. Accordingly, the question of the influence of thawing temperature on both types of tissues is relevant. The purpose of this study is to explore the transcriptomic differences of cryopreserved mature and immature testicular tissue subjected to different thawing methods by RNA sequencing. Collected and frozen testicular tissue samples were divided into four groups: quickly (in boiling water at 100 °C) thawed cryopreserved mature testicular tissue (group 1), slowly (by a physiological temperature of 37 °C) thawed mature testicular tissue (group 2), quickly thawed immature testicular tissue (group 3), and slowly thawed immature testicular tissue (group 4). Transcriptomic differences were assessed using differentially expressed genes (DEG), the Kyoto Encyclopedia of Genes and Genomes (KEGG), gene ontology (GO), and protein-protein interaction (PPI) analyses. No fundamental differences in the quality of cells of mature and immature testicular tissue after cryopreservation were found. Generally, thawing of mature and immature testicular tissue was more effective at 100 °C. The greatest difference in the intensity of gene expression was observed in ribosomes of cells thawed at 100 °C in comparison with cells thawed at 37 °C. In conclusion, an elevated speed of thawing is beneficial for frozen testicular tissue.
Collapse
Affiliation(s)
- Cheng Pei
- Department of Obstetrics and Gynecology, Medical Faculty, Cologne University, 50931 Cologne, Germany; (C.P.); (Q.K.); (E.I.); (N.M.-G.)
| | - Plamen Todorov
- Institute of Biology and Immunology of Reproduction of Bulgarian Academy of Sciences (BAS), 1113 Sofia, Bulgaria;
| | - Mengyang Cao
- Department of Obstetrics and Gynecology, Medical Faculty, Cologne University, 50931 Cologne, Germany; (C.P.); (Q.K.); (E.I.); (N.M.-G.)
| | - Qingduo Kong
- Department of Obstetrics and Gynecology, Medical Faculty, Cologne University, 50931 Cologne, Germany; (C.P.); (Q.K.); (E.I.); (N.M.-G.)
| | - Evgenia Isachenko
- Department of Obstetrics and Gynecology, Medical Faculty, Cologne University, 50931 Cologne, Germany; (C.P.); (Q.K.); (E.I.); (N.M.-G.)
| | - Gohar Rahimi
- Department of Obstetrics and Gynecology, Medical Faculty, Cologne University, 50931 Cologne, Germany; (C.P.); (Q.K.); (E.I.); (N.M.-G.)
- Medizinisches Versorgungszentrum AMEDES für IVF- und Pränatalmedizin in Köln GmbH, 50968 Cologne, Germany
| | - Nina Mallmann-Gottschalk
- Department of Obstetrics and Gynecology, Medical Faculty, Cologne University, 50931 Cologne, Germany; (C.P.); (Q.K.); (E.I.); (N.M.-G.)
| | - Pamela Uribe
- Center of Excellence in Translational Medicine, Scientific and Technological Bioresource Nucleus (CEMT-BIOREN), Temuco 4810296, Chile; (P.U.); (R.S.)
- Department of Internal Medicine, Faculty of Medicine, Universidad de la Frontera, Temuco 4811230, Chile
| | - Raul Sanchez
- Center of Excellence in Translational Medicine, Scientific and Technological Bioresource Nucleus (CEMT-BIOREN), Temuco 4810296, Chile; (P.U.); (R.S.)
- Department of Preclinical Sciences, Faculty of Medicine, Universidad de la Frontera, Temuco 4811230, Chile
| | - Volodimir Isachenko
- Department of Obstetrics and Gynecology, Medical Faculty, Cologne University, 50931 Cologne, Germany; (C.P.); (Q.K.); (E.I.); (N.M.-G.)
| |
Collapse
|
6
|
Kim M, Yoon HY. The biomechanical and biological effect of supercooling on cortical bone allograft. J Vet Sci 2023; 24:e79. [PMID: 37904641 PMCID: PMC10694378 DOI: 10.4142/jvs.23183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 09/04/2023] [Accepted: 09/13/2023] [Indexed: 11/01/2023] Open
Abstract
BACKGROUND The need for a storage method capable of preserving the intrinsic properties of bones without using toxic substances has always been raised. Supercooling is a relatively recently introduced preservation method that meets this need. Supercooling refers to the phenomenon of liquid in which the temperature drops below its freezing point without solidifying or crystallizing. OBJECTIVES The purpose of this study was to identify the preservation efficiency and applicability of the supercooling technique as a cortical bone allograft storage modality. METHODS The biomechanical effects of various storage methods, including deep freezing, cryopreservation, lyophilization, glycerol preservation, and supercooling, were evaluated with the three-point banding test, axial compression test, and electron microscopy. Additionally, cortical bone allografts were applied to the radial bone defect in New Zealand White rabbits to determine the biological effects. The degree of bone union was assessed with postoperative clinical signs, radiography, micro-computed tomography, and biomechanical analysis. RESULTS The biomechanical properties of cortical bone grafts preserved using glycerol and supercooling method were found to be comparable to those of normal bone while also significantly stronger than deep-frozen, cryopreserved, and lyophilized bone grafts. Preclinical research performed in rabbit radial defect models revealed that supercooled and glycerol-preserved bone allografts exhibited significantly better bone union than other groups. CONCLUSIONS Considering the biomechanical and biological superiority, the supercooling technique could be one of the optimal preservation methods for cortical bone allografts. This study will form the basis for a novel application of supercooling as a bone material preservation technique.
Collapse
Affiliation(s)
- MuYoung Kim
- Department of Small Animal Clinical Sciences, University of Florida College of Veterinary Medicine, Gainesville, FL 32611, United States of America
| | - Hun-Young Yoon
- Department of Veterinary Surgery, College of Veterinary Medicine, Konkuk University, Seoul 05029, Korea
- KU Center for Animal Blood Medical Science, Konkuk University, Seoul 05029, Korea.
| |
Collapse
|
7
|
Berkane Y, Hayau J, Filz von Reiterdank I, Kharga A, Charlès L, Mink van der Molen AB, Coert JH, Bertheuil N, Randolph MA, Cetrulo CL, Longchamp A, Lellouch AG, Uygun K. Supercooling: A Promising Technique for Prolonged Organ Preservation in Solid Organ Transplantation, and Early Perspectives in Vascularized Composite Allografts. FRONTIERS IN TRANSPLANTATION 2023; 2:1269706. [PMID: 38682043 PMCID: PMC11052586 DOI: 10.3389/frtra.2023.1269706] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Accepted: 09/29/2023] [Indexed: 05/01/2024]
Abstract
Ex-vivo preservation of transplanted organs is undergoing spectacular advances. Machine perfusion is now used in common practice for abdominal and thoracic organ transportation and preservation, and early results are in favor of substantially improved outcomes. It is based on decreasing ischemia-reperfusion phenomena by providing physiological or sub-physiological conditions until transplantation. Alternatively, supercooling techniques involving static preservation at negative temperatures while avoiding ice formation have shown encouraging results in solid organs. Here, the rationale is to decrease the organ's metabolism and need for oxygen and nutrients, allowing for extended preservation durations. The aim of this work is to review all advances of supercooling in transplantation, browsing the literature for each organ. A specific objective was also to study the initial evidence, the prospects, and potential applications of supercooling preservation in Vascularized Composite Allotransplantation (VCA). This complex entity needs a substantial effort to improve long-term outcomes, marked by chronic rejection. Improving preservation techniques is critical to ensure the favorable evolution of VCAs, and supercooling techniques could greatly participate in these advances.
Collapse
Affiliation(s)
- Yanis Berkane
- Vascularized Composite Allotransplantation Laboratory, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
- Shriners Children’s Boston, Harvard Medical School, Boston, MA, United States
- Department of Plastic, Reconstructive and Aesthetic Surgery, Hôpital Sud, CHU Rennes, University of Rennes, Rennes, France
- MOBIDIC, UMR INSERM 1236, Rennes University Hospital, Rennes, France
| | - Justine Hayau
- Division of Plastic Surgery, Lausanne University Hospital, Lausanne, Switzerland
| | - Irina Filz von Reiterdank
- Vascularized Composite Allotransplantation Laboratory, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
- Shriners Children’s Boston, Harvard Medical School, Boston, MA, United States
- Department of Plastic, Reconstructive and Hand Surgery, University Medical Center Utrecht, Utrecht, Netherlands
- Center for Engineering for Medicine and Surgery, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Anil Kharga
- Shriners Children’s Boston, Harvard Medical School, Boston, MA, United States
- Center for Engineering for Medicine and Surgery, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Laura Charlès
- Vascularized Composite Allotransplantation Laboratory, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
- Shriners Children’s Boston, Harvard Medical School, Boston, MA, United States
| | - Abele B. Mink van der Molen
- Department of Plastic, Reconstructive and Hand Surgery, University Medical Center Utrecht, Utrecht, Netherlands
| | - J. Henk Coert
- Department of Plastic, Reconstructive and Hand Surgery, University Medical Center Utrecht, Utrecht, Netherlands
| | - Nicolas Bertheuil
- Department of Plastic, Reconstructive and Aesthetic Surgery, Hôpital Sud, CHU Rennes, University of Rennes, Rennes, France
- MOBIDIC, UMR INSERM 1236, Rennes University Hospital, Rennes, France
| | - Mark A. Randolph
- Vascularized Composite Allotransplantation Laboratory, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
- Shriners Children’s Boston, Harvard Medical School, Boston, MA, United States
| | - Curtis L. Cetrulo
- Vascularized Composite Allotransplantation Laboratory, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
- Shriners Children’s Boston, Harvard Medical School, Boston, MA, United States
| | - Alban Longchamp
- Shriners Children’s Boston, Harvard Medical School, Boston, MA, United States
- Center for Engineering for Medicine and Surgery, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
- Department of Vascular Surgery, Lausanne University Hospital, Lausanne, Switzerland
- Center for Transplant Sciences, Massachusetts General Hospital, Boston, MA, United States
| | - Alexandre G. Lellouch
- Vascularized Composite Allotransplantation Laboratory, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
- Shriners Children’s Boston, Harvard Medical School, Boston, MA, United States
| | - Korkut Uygun
- Shriners Children’s Boston, Harvard Medical School, Boston, MA, United States
- Center for Engineering for Medicine and Surgery, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
- Center for Transplant Sciences, Massachusetts General Hospital, Boston, MA, United States
| |
Collapse
|
8
|
Lin H, Xu Y, Guan W, Zhao S, Li X, Zhang C, Blecker C, Liu J. The importance of supercooled stability for food during supercooling preservation: a review of mechanisms, influencing factors, and control methods. Crit Rev Food Sci Nutr 2023:1-15. [PMID: 37667834 DOI: 10.1080/10408398.2023.2248515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
Supercooling can preserve food in its original fresh state below its ice point temperature without freezing. However, the supercooled state is unstable in thermodynamics, state breakdown can occur at any moment, resulting in irregular and larger ice crystals formation, leading to food tissue damage, and loss of quality and nutrients. While the effectiveness of supercooling preservation has been verified in the lab and pilot scale tests, the stability of the supercooled state of food remains an open question, posing a limitation for larger industrial-scale application of supercooling preservation. Based on this background, this review presents the instability mechanisms of supercooling preservation and summarizes the factors such as food properties (e.g., material size, food components, specific surface area, and surface roughness) and preservation circumstances (e.g., cooling rate, temperature variation, and mechanical disturbance) that influence the stability of the supercooled state of food. The review also discusses novel techniques for enhancing the supercooling capacity and their limitations (e.g., precise temperature control and magnetic field). Further studies are necessary to comprehensively evaluate the effects of influence factors and supercooling technologies on supercooling, realizing the true sense of 'no-crystal' food products under subzero temperature preservation conditions in commercial applications.
Collapse
Affiliation(s)
- Hengxun Lin
- Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
- Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium
| | - Ying Xu
- Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Wenqiang Guan
- Tianjin Key Laboratory of Food Biotechnology, Tianjin University of Commerce, Tianjin, China
| | - Songsong Zhao
- Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce, Tianjin, China
| | - Xia Li
- Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Chunhui Zhang
- Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
| | | | - Jiqian Liu
- Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
| |
Collapse
|
9
|
Mutsenko V, Anastassopoulos E, Zaragotas D, Simaioforidou A, Tarusin D, Lauterboeck L, Sydykov B, Brunotte R, Brunotte K, Rozanski C, Petrenko AY, Braslavsky I, Glasmacher B, Gryshkov O. Monitoring of freezing patterns within 3D collagen-hydroxyapatite scaffolds using infrared thermography. Cryobiology 2023:S0011-2240(23)00007-X. [PMID: 37062517 DOI: 10.1016/j.cryobiol.2023.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 02/02/2023] [Accepted: 02/05/2023] [Indexed: 04/18/2023]
Abstract
The importance of cryopreservation in tissue engineering is unceasingly increasing. Preparation, cryopreservation, and storage of tissue-engineered constructs (TECs) at an on-site location offer a convenient way for their clinical application and commercialization. Partial freezing initiated at high sub-zero temperatures using ice-nucleating agents (INAs) has recently been applied in organ cryopreservation. It is anticipated that this freezing technique may be efficient for the preservation of both scaffold mechanical properties and cell viability of TECs. Infrared thermography is an instrumental method to monitor INAs-mediated freezing of various biological entities. In this paper, porous collagen-hydroxyapatite (HAP) scaffolds were fabricated and characterized as model TECs, whereas infrared thermography was proposed as a method for monitoring the crystallization-related events on their partial freezing down to -25 °C. Intra- and interscaffold latent heat transmission were descriptively evaluated. Nucleation, freezing points as well as the degree of supercooling and duration of crystallization were calculated based on inspection of respective thermographic curves. Special consideration was given to the cryoprotective agent (CPA) composition (Snomax®, crude leaf extract from Hippophae rhamnoides, dimethyl sulfoxide (Me2SO) and recombinant type-III antifreeze protein (AFP)) and freezing conditions ('in air' or 'in bulk CPA'). For CPAs without ice nucleation activity, thermographic measurements demonstrated that the supercooling was significantly milder in the case of scaffolds present in a CPA solution compared to that without them. This parameter (ΔT, °C) altered with the following tendency: 10 Me2SO (2.90 ± 0.54 ('in air') vs. 7.71 ± 0.43 ('in bulk CPA', P < 0.0001)) and recombinant type-III AFP, 0.5 mg/ml (2.65 ± 0.59 ('in air') vs. 7.68 ± 0.34 ('in bulk CPA', P < 0.0001)). At the same time, in CPA solutions with ice nucleation activity the least degree of supercooling and the longest crystallization duration (Δt, min) for scaffolds frozen 'in air' were documented for crude leaf homogenate (CLH) from Hippophae rhamnoides (1.57 ± 0.37 °C and 21.86 ± 2.93 min compared to Snomax, 5 μg/ml (2.14 ± 0.33 °C and 23.09 ± 0.05), respectively). The paper offers evidence that infrared thermography provides insightful information for monitoring partial freezing events in TECs when using different freezing containers, CPAs and conditions. This may further TEC-specific cryopreservation and optimization of CPA compositions with slow-nucleating properties.
Collapse
Affiliation(s)
- Vitalii Mutsenko
- Institute for Multiphase Processes, Leibniz University Hannover, Garbsen, Germany; Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Hannover, Germany.
| | | | - Dimitris Zaragotas
- Department of Agricultural Engineering Technologists, TEI Thessaly, Larissa, Greece
| | | | - Dmytro Tarusin
- Institute for Problems of Cryobiology and Cryomedicine, National Academy of Sciences of Ukraine, Kharkiv, Ukraine
| | - Lothar Lauterboeck
- Institute for Multiphase Processes, Leibniz University Hannover, Garbsen, Germany; Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Hannover, Germany
| | - Bulat Sydykov
- Institute for Multiphase Processes, Leibniz University Hannover, Garbsen, Germany
| | - Ricarda Brunotte
- Institute for Multiphase Processes, Leibniz University Hannover, Garbsen, Germany
| | - Kai Brunotte
- Institute of Forming Technology and Forming Machines, Leibniz University Hannover, Garbsen, Germany
| | - Corinna Rozanski
- Institute of Building Materials Science, Leibniz University Hannover, Hannover, Germany
| | - Alexander Y Petrenko
- Institute for Problems of Cryobiology and Cryomedicine, National Academy of Sciences of Ukraine, Kharkiv, Ukraine
| | - Ido Braslavsky
- The Robert H. Smith Faculty of Agriculture, Food, and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Birgit Glasmacher
- Institute for Multiphase Processes, Leibniz University Hannover, Garbsen, Germany; Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Hannover, Germany
| | - Oleksandr Gryshkov
- Institute for Multiphase Processes, Leibniz University Hannover, Garbsen, Germany; Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Hannover, Germany
| |
Collapse
|
10
|
Daily MI, Whale TF, Kilbride P, Lamb S, John Morris G, Picton HM, Murray BJ. A highly active mineral-based ice nucleating agent supports in situ cell cryopreservation in a high throughput format. J R Soc Interface 2023; 20:20220682. [PMID: 36751925 PMCID: PMC9905984 DOI: 10.1098/rsif.2022.0682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023] Open
Abstract
Cryopreservation of biological matter in microlitre scale volumes of liquid would be useful for a range of applications. At present, it is challenging because small volumes of water tend to supercool, and deep supercooling is known to lead to poor post-thaw cell viability. Here, we show that a mineral ice nucleator can almost eliminate supercooling in 100 µl liquid volumes during cryopreservation. This strategy of eliminating supercooling greatly enhances cell viability relative to cryopreservation protocols with uncontrolled ice nucleation. Using infrared thermography, we demonstrate a direct relationship between the extent of supercooling and post-thaw cell viability. Using a mineral nucleator delivery system, we open the door to the routine cryopreservation of mammalian cells in multiwell plates for applications such as high throughput toxicology testing of pharmaceutical products and regenerative medicine.
Collapse
Affiliation(s)
- Martin I. Daily
- Institute of Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK
| | - Thomas F. Whale
- Department of Chemistry, University of Warwick, Gibbet Hill, Coventry CV4 7AL, UK
| | | | | | | | - Helen M. Picton
- Discovery and Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, School of Medicine, University of Leeds, Leeds LS2 9JT, UK
| | - Benjamin J. Murray
- Institute of Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK
| |
Collapse
|
11
|
Song M, Park J, Jeon J, Ha YG, Cho YR, Koo HJ, Kim W, Bae H. Application of poly (vinyl alcohol)-cryogels to immobilizing nitrifiers: Enhanced tolerance to shear stress-induced destruction and viability control. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 855:158835. [PMID: 36122708 DOI: 10.1016/j.scitotenv.2022.158835] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 09/13/2022] [Accepted: 09/14/2022] [Indexed: 06/15/2023]
Abstract
The hardness of poly (vinyl alcohol)-cryogels (PVA-CGs) was improved under three parameter conditions: 7.5 %-12.5 % PVA, 1-5 freezing-thawing cycles (FTCs), and the addition of 0 %-10 % glycerol as a cryoprotectant. This study investigated the effects of shear stress-induced destruction (SSID) on mechanical strength by inducing rapid erosion with a high frictional force. Tolerance to SSID (Tol-SSID) exhibited different sensitivities and trends depending on the above three fabrication parameters. The measured Tol-SSID exhibited consistent and inconsistent trends with tensile strength and swelling, respectively. Tol-SSID evaluation provides new insights into the practically meaningful mechanical strength of PVA-CGs against strong friction, which simulates extreme shear stress in a bioreactor. A PVA-CG with a PVA concentration of 10 % and in two FTCs resulted in Tol-SSID and tensile strength of 88.3 % and 0.59 kPa, respectively. Here, 5 % glycerol was added to maintain the bacterial respiration activity of immobilized nitrifiers of 0.097 mg-O2/g-VSS·min and survival of 88.6 %. The continuous mode of nitrification using the optimized PVA-CG for 10 days resulted in an ammonia removal rate of 0.2173 kg-N/m3·d, which is an improvement over cases without glycerol addition: 0.1426 and 0.1472 kg-N/m3·d for PVA-CGs in two and three FTCs, respectively.
Collapse
Affiliation(s)
- Minsu Song
- Department of Civil and Environmental Engineering, Pusan National University, 63 Busandeahak-ro, Geumjeong-Gu, Busan 46241, Republic of Korea
| | - Jihye Park
- Department of Civil and Environmental Engineering, Pusan National University, 63 Busandeahak-ro, Geumjeong-Gu, Busan 46241, Republic of Korea
| | - Junbeom Jeon
- Department of Civil and Environmental Engineering, Pusan National University, 63 Busandeahak-ro, Geumjeong-Gu, Busan 46241, Republic of Korea; Institute for Environment and Energy, Pusan National University, 63 Busandeahak-ro, Geumjeong-Gu, Busan 46241, Republic of Korea
| | - Yun-Geun Ha
- School of Materials Science and Engineering, Pusan National University, 63 Busandeahak-ro, Geumjeong-Gu, Busan 46241, Republic of Korea
| | - Young-Rae Cho
- School of Materials Science and Engineering, Pusan National University, 63 Busandeahak-ro, Geumjeong-Gu, Busan 46241, Republic of Korea
| | - Hyung-Jun Koo
- Department of Chemical and Biomolecular Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Republic of Korea
| | - Woong Kim
- Department of Environmental Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Hyokwan Bae
- Department of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan 44919, Republic of Korea; Graduate School of Carbon Neutrality, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea.
| |
Collapse
|
12
|
Sosso GC, Sudera P, Backes AT, Whale TF, Fröhlich-Nowoisky J, Bonn M, Michaelides A, Backus EHG. The role of structural order in heterogeneous ice nucleation. Chem Sci 2022; 13:5014-5026. [PMID: 35655890 PMCID: PMC9067566 DOI: 10.1039/d1sc06338c] [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: 11/15/2021] [Accepted: 04/07/2022] [Indexed: 01/10/2023] Open
Abstract
The freezing of water into ice is a key process that is still not fully understood. It generally requires an impurity of some description to initiate the heterogeneous nucleation of the ice crystals. The molecular structure, as well as the extent of structural order within the impurity in question, both play an essential role in determining its effectiveness. However, disentangling these two contributions is a challenge for both experiments and simulations. In this work, we have systematically investigated the ice-nucleating ability of the very same compound, cholesterol, from the crystalline (and thus ordered) form to disordered self-assembled monolayers. Leveraging a combination of experiments and simulations, we identify a “sweet spot” in terms of the surface coverage of the monolayers, whereby cholesterol maximises its ability to nucleate ice (which remains inferior to that of crystalline cholesterol) by enhancing the structural order of the interfacial water molecules. These findings have practical implications for the rational design of synthetic ice-nucleating agents. The freezing of water into ice is still not fully understood. Here, we investigate the role of structural disorder within the biologically relevant impurities that facilitate this fundamental phase transition.![]()
Collapse
Affiliation(s)
- Gabriele C Sosso
- Department of Chemistry, University of Warwick Gibbet Hill Road Coventry CV4 7AL UK
| | - Prerna Sudera
- Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany
| | - Anna T Backes
- Max Planck Institute for Chemistry Hahn-Meitner-Weg 1 55128 Mainz Germany
| | - Thomas F Whale
- Department of Chemistry, University of Warwick Gibbet Hill Road Coventry CV4 7AL UK
| | | | - Mischa Bonn
- Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany
| | - Angelos Michaelides
- Yusuf Hamied Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Ellen H G Backus
- Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany.,Department of Physical Chemistry, University of Vienna Währingerstrasse 42 1090 Wien Austria
| |
Collapse
|
13
|
Direct Evidence of Ice Crystallization Inhibition by Dielectric Relaxation of Hydrated Ions. MATERIALS 2021; 14:ma14226975. [PMID: 34832375 PMCID: PMC8618217 DOI: 10.3390/ma14226975] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/12/2021] [Accepted: 11/15/2021] [Indexed: 12/14/2022]
Abstract
In this paper, the inhibition effect of an alternative current (AC) electric field on ice crystallization in 0.9 wt % NaCl aqueous solution was confirmed thermodynamically with characterization. An innovative experimental and analytical method, combining differential scanning calorimeter (DSC) measurement with an externally applied electric field was created by implanting microelectrodes in a sample crucible. It was found that the ice crystallization, including pure ice and salty ice, was obviously inhibited after field cooling with an external AC electric field in a frequency range of 100 k-10 MHz, and the crystallization ratio was related to frequency. Compared with non-field cooling, the crystallization ratio of ice crystals was reduced to less than 20% when E = 57.8 kV/m and f = 1 MHz. The dielectric spectrum results show that this inhibition effect of an alternating electric field on ice crystal growth is closely related to the dielectric relaxation process of hydrated ions.
Collapse
|
14
|
Cryopreservation of NK and T Cells Without DMSO for Adoptive Cell-Based Immunotherapy. BioDrugs 2021; 35:529-545. [PMID: 34427899 DOI: 10.1007/s40259-021-00494-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/28/2021] [Indexed: 10/20/2022]
Abstract
Dimethylsufoxide (DMSO) being universally used as a cryoprotectant in clinical adoptive cell-therapy settings to treat hematological malignancies and solid tumors is a growing concern, largely due to its broad toxicities. Its use has been associated with significant clinical side effects-cardiovascular, neurological, gastrointestinal, and allergic-in patients receiving infusions of cell-therapy products. DMSO has also been associated with altered expression of natural killer (NK) and T-cell markers and their in vivo function, not to mention difficulties in scaling up DMSO-based cryoprotectants, which introduce manufacturing challenges for autologous and allogeneic cellular therapies, including chimeric antigen receptor (CAR)-T and CAR-NK cell therapies. Interest in developing alternatives to DMSO has resulted in the evaluation of a variety of sugars, proteins, polymers, amino acids, and other small molecules and osmolytes as well as modalities to efficiently enable cellular uptake of these cryoprotectants. However, the DMSO-free cryopreservation of NK and T cells remains difficult. They represent heterogeneous cell populations that are sensitive to freezing and thawing. As a result, clinical use of cryopreserved cell-therapy products has not moved past the use of DMSO. Here, we present the state of the art in the development and use of cryopreservation options that do not contain DMSO toward clinical solutions to enable the global deployment of safer adoptively transferred cell-based therapies.
Collapse
|
15
|
The Advantage of the Supercooling Storage Method for Transplantable Sources: Human Umbilical Vessel Endothelial Cells and Mouse Skin Grafts. Transplant Proc 2021; 53:1756-1761. [PMID: 34006379 DOI: 10.1016/j.transproceed.2021.03.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Accepted: 03/17/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND The safety and efficacy of preserving transplantable tissue depends on multiple factors including temperature, length of preservation, and types of solvent. Supercooling storage, in which the preservation temperature goes below the freezing point without actual freezing of the tissue, has the potential to substantially extend the preservation time of cells, tissues, and organs. Herein we studied the effect of supercooling storage on preserving the viability of transplantable biomaterials. METHODS Human umbilical vein endothelial cells (HUVECs) and mouse dorsal skin grafts were stored at 2 different temperature (4°C and -4°C). The viability of these tissues was assessed using trypan blue exclusion assay, tetrazolium salt (WST-8) assay, and proliferating cell nuclear antigen immunohistochemistry analysis at various time points. RESULTS Over time, the viability of HUVECs and mouse skin grafts decreased in each group and at both storage temperatures. The viability of HUVECs, evaluated with trypan blue exclusion assay and WST-8 assay, was better preserved during supercooled storage (-4°C) compared with refrigerated storage (4°C). Mouse skin grafts preserved under supercooled conditions showed less damage and a higher level of proliferating cell nuclear antigen expression. CONCLUSION Among various preservation techniques, supercooling storage is 1 option to maintain optimal conditions for an increased organ transplantation success rate. To maximize preservation effectiveness, further investigations into the optimal supercooling temperatures, storage solvents, and cell protectants for various cells, tissues, and organs are needed.
Collapse
|
16
|
Cryopreservation of Mesenchymal Stem Cells Using Medical Grade Ice Nucleation Inducer. Int J Mol Sci 2020; 21:ijms21228579. [PMID: 33203028 PMCID: PMC7696797 DOI: 10.3390/ijms21228579] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 10/21/2020] [Accepted: 10/29/2020] [Indexed: 01/14/2023] Open
Abstract
Mesenchymal stem cells (MSCs) can differentiate into multiple different tissue lineages and have favourable immunogenic potential making them an attractive prospect for regenerative medicine. As an essential part of the manufacturing process, preservation of these cells whilst maintaining potential is of critical importance. An uncontrolled area of storage remains the rate of change of temperature during freezing and thawing. Controlled-rate freezers attempted to rectify this; however, the change of phase from liquid to solid introduces two extreme phenomena; a rapid rise and a rapid fall in temperature in addition to the intended cooling rate (normally -1 °C/min) as a part of the supercooling event in cryopreservation. Nucleation events are well known to initiate the freezing transition although their active use in the form of ice nucleation devices (IND) are in their infancy in cryopreservation. This study sought to better understand the effects of ice nucleation and its active instigation with the use of an IND in both a standard cryotube with MSCs in suspension and a high-throughput adhered MSC 96-well plate set-up. A potential threshold nucleation temperature for best recovery of dental pulp MSCs may occur around -10 °C and for larger volume cell storage, IND and fast thaw creates the most stable process. For adhered cells, an IND with a slow thaw enables greatest metabolic activity post-thaw. This demonstrates a necessity for a medical grade IND to be used in future regenerative medicine manufacturing with the parameters discussed in this study to create stable products for clinical cellular therapies.
Collapse
|
17
|
Kang T, Hoptowit R, Jun S. Effects of an oscillating magnetic field on ice nucleation in aqueous iron‐oxide nanoparticle dispersions during supercooling and preservation of beef as a food application. J FOOD PROCESS ENG 2020. [DOI: 10.1111/jfpe.13525] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Taiyoung Kang
- Department of Molecular Biosciences and Bioengineering University of Hawaii at Manoa Honolulu Hawaii USA
| | - Raymond Hoptowit
- Department of Molecular Biosciences and Bioengineering University of Hawaii at Manoa Honolulu Hawaii USA
| | - Soojin Jun
- Department of Human Nutrition, Food and Animal Sciences University of Hawaii at Manoa Honolulu Hawaii USA
| |
Collapse
|
18
|
In-cell destabilization of a homodimeric protein complex detected by DEER spectroscopy. Proc Natl Acad Sci U S A 2020; 117:20566-20575. [PMID: 32788347 DOI: 10.1073/pnas.2005779117] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The complexity of the cellular medium can affect proteins' properties, and, therefore, in-cell characterization of proteins is essential. We explored the stability and conformation of the first baculoviral IAP repeat (BIR) domain of X chromosome-linked inhibitor of apoptosis (XIAP), BIR1, as a model for a homodimer protein in human HeLa cells. We employed double electron-electron resonance (DEER) spectroscopy and labeling with redox stable and rigid Gd3+ spin labels at three representative protein residues, C12 (flexible region), E22C, and N28C (part of helical residues 26 to 31) in the N-terminal region. In contrast to predictions by excluded-volume crowding theory, the dimer-monomer dissociation constant K D was markedly higher in cells than in solution and dilute cell lysate. As expected, this increase was partially recapitulated under conditions of high salt concentrations, given that conserved salt bridges at the dimer interface are critically required for association. Unexpectedly, however, also the addition of the crowding agent Ficoll destabilized the dimer while the addition of bovine serum albumin (BSA) and lysozyme, often used to represent interaction with charged macromolecules, had no effect. Our results highlight the potential of DEER for in-cell study of proteins as well as the complexities of the effects of the cellular milieu on protein structures and stability.
Collapse
|
19
|
Impact of Processing Factors on Quality of Frozen Vegetables and Fruits. FOOD ENGINEERING REVIEWS 2020. [DOI: 10.1007/s12393-020-09216-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
AbstractIn this paper I review the production of frozen vegetables and fruits from a chain perspective. I argue that the final quality of the frozen product still can be improved via (a) optimization of the complete existing production chain towards quality, and/or (b) introduction of some promising novel processing technology. For this optimization, knowledge is required how all processing steps impact the final quality. Hence, first I review physicochemical and biochemical processes underlying the final quality, such as water holding capacity, ice crystal growth and mechanical damage. Subsequently, I review how each individual processing step impacts the final quality via these fundamental physicochemical and biochemical processes. In this review of processing steps, I also review the potential of novel processing technologies. The results of our literature review are summarized via a causal network, linking processing steps, fundamental physicochemical and biochemical processes, and their correlation with final product quality. I conclude that there is room for optimization of the current production chains via matching processing times with time scales of the fundamental physicochemical and biochemical processes. Regarding novel processing technology, it is concluded in general that they are difficult to implement in the context of existing production chains. I do see the potential for novel processing technology combined with process intensification, incorporating the blanching pretreatment—but which involves quite a change of the production chain.
Collapse
|
20
|
Ros E, Encina M, González F, Contreras R, Luz-Crawford P, Khoury M, Acevedo JP. Single cell migration profiling on a microenvironmentally tunable hydrogel microstructure device that enables stem cell potency evaluation. LAB ON A CHIP 2020; 20:958-972. [PMID: 31990283 DOI: 10.1039/c9lc00988d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Cell migration is a key function in a myriad of physiological events and disease conditions. Efficient, quick and descriptive profiling of migration behaviour in response to different treatments or conditions is highly desirable in a series of applications, ranging from fundamental studies of the migration mechanism to drug discovery and cell therapy. This investigation applied the use of methacrylamide gelatin (GelMA) to microfabricate migration lanes based on GelMA hydrogel with encapsulated migration stimuli and structural stability under culture medium conditions, providing the possibility of tailoring the microenvironment during cell-based assays. The actual device provides 3D topography, cell localization and a few step protocol, allowing the quick evaluation and quantification of individual migrated distances of a cell sample by an ImageJ plugin for automated microscopy processing. The detailed profiling of migration behaviour given by the new device has demonstrated a broader assay sensitivity compared to other migration assays and higher versatility to study cell migration in different settings of applications. In this study, parametric information extracted from the migration profiling was successfully used to develop predictive models of immunosuppressive cell function that could be applied as a potency test for mesenchymal stem cells.
Collapse
Affiliation(s)
- Enrique Ros
- Cells for Cells, Santiago, Chile and Consorcio Regenero, Chilean Consortium for Regenerative Medicine, Santiago, Chile
| | - Matías Encina
- Cells for Cells, Santiago, Chile and Consorcio Regenero, Chilean Consortium for Regenerative Medicine, Santiago, Chile
| | - Fabián González
- Cells for Cells, Santiago, Chile and Consorcio Regenero, Chilean Consortium for Regenerative Medicine, Santiago, Chile
| | - Rafael Contreras
- Laboratorio de Inmunología Celular y Molecular, Centro de Investigación Biomédica, Facultad de Medicina, Universidad de los Andes, Santiago, Chile
| | - Patricia Luz-Crawford
- Laboratorio de Inmunología Celular y Molecular, Centro de Investigación Biomédica, Facultad de Medicina, Universidad de los Andes, Santiago, Chile
| | - Maroun Khoury
- Cells for Cells, Santiago, Chile and Consorcio Regenero, Chilean Consortium for Regenerative Medicine, Santiago, Chile and Laboratory of Nano-Regenerative Medicine, Faculty of Medicine, Universidad de los Andes, Santiago, Chile.
| | - Juan Pablo Acevedo
- Cells for Cells, Santiago, Chile and Consorcio Regenero, Chilean Consortium for Regenerative Medicine, Santiago, Chile and Laboratory of Nano-Regenerative Medicine, Faculty of Medicine, Universidad de los Andes, Santiago, Chile.
| |
Collapse
|
21
|
Daily MI, Whale TF, Partanen R, Harrison AD, Kilbride P, Lamb S, Morris GJ, Picton HM, Murray BJ. Cryopreservation of primary cultures of mammalian somatic cells in 96-well plates benefits from control of ice nucleation. Cryobiology 2020; 93:62-69. [PMID: 32092295 PMCID: PMC7191264 DOI: 10.1016/j.cryobiol.2020.02.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 02/19/2020] [Accepted: 02/20/2020] [Indexed: 12/12/2022]
Abstract
Cryopreservation of mammalian cells has to date typically been conducted in cryovials, but there are applications where cryopreservation of primary cells in multiwell plates would be advantageous. However excessive supercooling in the small volumes of liquid in each well of the multiwell plates is inevitable without intervention and tends to result in high and variable cell mortality. Here, we describe a technique for cryopreservation of adhered primary bovine granulosa cells in 96-well plates by controlled rate freezing using controlled ice nucleation. Inducing ice nucleation at warm supercooled temperatures (less than 5 °C below the melting point) during cryopreservation using a manual seeding technique significantly improved post-thaw recovery from 29.6% (SD = 8.3%) where nucleation was left uncontrolled to 57.7% (9.3%) when averaged over 8 replicate cultures (p < 0.001). Detachment of thawed cells was qualitatively observed to be more prevalent in wells which did not have ice nucleation control which suggests cryopreserved cell monolayer detachment may be a consequence of deep supercooling. Using an infra-red thermography technique we showed that many aliquots of cryoprotectant solution in 96-well plates can supercool to temperatures below −20 °C when nucleation is not controlled, and also that the freezing temperatures observed are highly variable despite stringent attempts to remove contaminants acting as nucleation sites. We conclude that successful cryopreservation of cells in 96-well plates, or any small volume format, requires control of ice nucleation.
Collapse
Affiliation(s)
- Martin I Daily
- Institute of Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK.
| | - Thomas F Whale
- Institute of Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK
| | - Riitta Partanen
- Discovery and Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, School of Medicine, University of Leeds, Leeds, LS2 9JT, UK
| | - Alexander D Harrison
- Institute of Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK
| | - Peter Kilbride
- Asymptote Ltd (GE Healthcare), Sovereign House, Cambridge, CB24 9BZ, UK
| | - Stephen Lamb
- Asymptote Ltd (GE Healthcare), Sovereign House, Cambridge, CB24 9BZ, UK
| | - G John Morris
- Asymptote Ltd (GE Healthcare), Sovereign House, Cambridge, CB24 9BZ, UK
| | - Helen M Picton
- Discovery and Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, School of Medicine, University of Leeds, Leeds, LS2 9JT, UK
| | - Benjamin J Murray
- Institute of Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK
| |
Collapse
|
22
|
Nakagawa H, Oyama T. Molecular Basis of Water Activity in Glycerol-Water Mixtures. Front Chem 2019; 7:731. [PMID: 31737605 PMCID: PMC6839025 DOI: 10.3389/fchem.2019.00731] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 10/14/2019] [Indexed: 12/11/2022] Open
Abstract
Water activity (Aw) is a reliable indication of the microbial growth, enzymatic activity, preservation, and quality of foods. However, a molecular basis of Aw is still under debate in multiple related disciplines. Glycerol-water mixtures can provide a variation of Aws by controlling the ratio of glycerol and water. In this study, the molecular basis of Aw was examined by using differential scanning calorimetry (DSC), attenuated total reflection Fourier-transform infrared spectroscopy (ATR-IR), and incoherent quasi-elastic neutron scattering (IQENS) based on moisture sorption isotherms of glycerol-water mixtures. Three regions were identified and classified based on DSC results. DSC showed that bulk-like water existed at Aw > ≈ 0.7 at 27°C. Hydrogen bonding related molecular vibrations were analyzed by ATR-IR, which indicated that the OH stretching in water molecules is significantly different for Aw > ≈ 0.7. Translational diffusive and/or rotational motions in time and space analyzed by IQENS appeared when Aw > ≈ 0.7, and are correlated with hydrogen bonding related local vibrational dynamics in the glycerol-water mixtures. More importantly, Aw values of glycerol-water mixtures can be explained by the hydrogen bonding network and molecular dynamics of water in the solution. We discuss the implications of Aw in the preservation of food at the molecular level.
Collapse
Affiliation(s)
- Hiroshi Nakagawa
- Hierarchical Structure Research Group, Materials Science Research Center, Japan Atomic Energy Agency, Ibaraki, Japan
| | | |
Collapse
|
23
|
Fischer G, Handler M, Johnston PR, Baumgarten D. Impedance and conductivity of bovine myocardium during freezing and thawing at slow rates - implications for cardiac cryo-ablation. Med Eng Phys 2019; 74:89-98. [PMID: 31570217 DOI: 10.1016/j.medengphy.2019.09.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 09/12/2019] [Accepted: 09/16/2019] [Indexed: 01/19/2023]
Abstract
Increasing impedance during freezing might be a valuable marker for guiding cardiac cryo-ablation. We provide model based insights on how decreasing temperature below the freezing point of tissue relates to the percentage of frozen water. Furthermore, we provide experimental data for comparing this percentage with the increase in impedance. Measurements were performed on a bovine tissue sample at frequencies between 5 and 80 kHz. Slow cooling and heating rates were applied to minimize temperature gradients in the myocardial sample and to allow accurate assessment of the freezing point. Computer simulation was applied to link impedance with temperature dependent conductivities. The osmotic virial equation was used to estimate the percentage of frozen water. Measurements identified the freezing point at -0.6 ∘C. At -5 ∘C, impedance rose by more than a factor of ten compared to that at the freezing point and the percentage of frozen water was estimated as being 89%. At -49 ∘C impedance had increased by up to three orders of magnitude and ice formation was most pronounced in the extracellular space. Progressive ice formation in tissue is reflected by a large increase in impedance, and impedance increases monotonically with the percentage of frozen water. Its analysis allows for experimental assessment of factors relevant to cell death. Solid ice contributes to the rupture of the micro-vasculature, while phase shifts reflect concentration differences between extra- and intracellular space driving osmotic water transfer across cell membranes.
Collapse
Affiliation(s)
- G Fischer
- Institute of Electrical and Biomedical Engineering, UMIT - Private University for Health Sciences, Medical Informatics and Technology, Eduard-Wallnoefer-Zentrum 1, Hall in Tyrol 6060, Austria; AFreeze GmbH, Innsbruck, Austria.
| | - M Handler
- Institute of Electrical and Biomedical Engineering, UMIT - Private University for Health Sciences, Medical Informatics and Technology, Eduard-Wallnoefer-Zentrum 1, Hall in Tyrol 6060, Austria; School of Environment and Science, Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan, Queensland, Australia
| | - P R Johnston
- School of Environment and Science, Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan, Queensland, Australia
| | - D Baumgarten
- Institute of Electrical and Biomedical Engineering, UMIT - Private University for Health Sciences, Medical Informatics and Technology, Eduard-Wallnoefer-Zentrum 1, Hall in Tyrol 6060, Austria; Institute of Electrical and Biomedical Engineering, Technische Universität Ilmenau, Ilmenau, Germany
| |
Collapse
|
24
|
Fujisawa R, Mizuno M, Katano H, Otabe K, Ozeki N, Tsuji K, Koga H, Sekiya I. Cryopreservation in 95% serum with 5% DMSO maintains colony formation and chondrogenic abilities in human synovial mesenchymal stem cells. BMC Musculoskelet Disord 2019; 20:316. [PMID: 31279341 PMCID: PMC6612159 DOI: 10.1186/s12891-019-2700-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 06/27/2019] [Indexed: 12/23/2022] Open
Abstract
Background Synovial mesenchymal stem cells (MSCs) are an attractive cell source for cartilage and meniscus regeneration. The optimum cryopreservation medium has not been determined, but dimethylsulfoxide (DMSO) should be excluded, if possible, because of its toxicity. The purposes of our study were to examine the possible benefits of higher concentrations of serum and the effectiveness of 100% serum (without DMSO) for the cryopreservation of synovial MSCs. Methods Human synovium was harvested from the knees of four donors with osteoarthritis during total knee arthroplasty. Synovial MSCs (8 × 105 cells) were suspended in 400 μL medium and used as a Time 0 control. The same number of synovial MSCs was also suspended in 400 μL α-MEM medium containing 10% fetal bovine serum (FBS) (5% DMSO, and 1% antibiotic), 95% FBS (and 5% DMSO), or 100% FBS (no DMSO) and cryopreserved at − 80 °C for 7 days. After thawing, the cell suspensions (1.5 μL; 3 × 103 cells) were cultured in 60 cm2 dishes for 14 days for colony formation assays. Additional 62.5 μL samples of cell suspensions (1.25 × 105 cells) were added to tubes and cultured for 21 days for chondrogenesis assays. Results Colony numbers were significantly higher in the Time 0 and 95% FBS groups than in the 10% FBS group (n = 24). Colony numbers were much lower in the 100% FBS group than in the other three groups. The cell numbers per dish reflected the colony numbers. Cartilage pellet weights were significantly heavier in the 95% FBS group than in the 10% FBS group, whereas no difference was observed between the Time 0 and the 95% FBS groups (n = 24). No cartilage pellets formed at all in the 100% FBS group. Conclusion Synovial MSCs cryopreserved in 95% FBS with 5% DMSO maintained their colony formation and chondrogenic abilities to the same levels as observed in the cells before cryopreservation. Synovial MSCs cryopreserved in 100% FBS lost their colony formation and chondrogenic abilities. Electronic supplementary material The online version of this article (10.1186/s12891-019-2700-3) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Ryota Fujisawa
- Center for Stem Cell and Regenerative Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Mitsuru Mizuno
- Center for Stem Cell and Regenerative Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Hisako Katano
- Center for Stem Cell and Regenerative Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Koji Otabe
- Center for Stem Cell and Regenerative Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Nobutake Ozeki
- Center for Stem Cell and Regenerative Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Kunikazu Tsuji
- Department of Cartilage Regeneration, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hideyuki Koga
- Department of Joint Surgery and Sports Medicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Ichiro Sekiya
- Center for Stem Cell and Regenerative Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan.
| |
Collapse
|
25
|
Poisson JS, Acker JP, Briard JG, Meyer JE, Ben RN. Modulating Intracellular Ice Growth with Cell-Permeating Small-Molecule Ice Recrystallization Inhibitors. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:7452-7458. [PMID: 30119611 DOI: 10.1021/acs.langmuir.8b02126] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Ice formation remains central to our understanding of the effects of low temperatures on the biological response of cells and tissues. The formation of ice inside of cells and the net increase in crystal size due to recrystallization during thawing is associated with a loss of cell viability during cryopreservation. Because small-molecule ice recrystallization inhibitors (IRIs) can control the growth of extracellular ice, we sought to investigate the ability of two aryl-glycoside-based IRIs to permeate into cells and control intracellular ice recrystallization. An interrupted graded freezing technique was used to evaluate the IRI permeation into human red blood cells (RBCs) and mitigate cell damage during freezing and thawing. The effect of IRIs on the intracellular growth of ice crystals in human umbilical vein endothelial cells (HUVECs) was visualized in real time under different thawing conditions using fluorescence cryomicroscopy. Adding an aryl glycoside to 15% glycerol significantly increased post-thaw RBC integrity by up to 55% during slow cooling compared with the 15%-glycerol-only control group. The characteristics of the cryobiological behavior of the RBCs subjected to the interrupted graded freezing suggest that the aryl-glycoside-based IRI is internalized into the RBCs. HUVECs treated with the IRIs were shown to retain a large number of small ice crystals during warming to high subzero temperatures and demonstrated a significant inhibition of intracellular ice recrystallization. Under slow thawing conditions, the aryl glycoside IRI p-bromophenyl-β-d-glucoside was shown to be most effective at inhibiting intracellular ice recrystallization. We demonstrate that IRIs are capable of internalizing into cells, altering the cryobiological response of cells to slow and rapid freezing and controlling intracellular ice recrystallization during freezing. We conclude that IRIs have tremendous potential as cryoprotectants for the preservation of cells and tissues at high subzero temperatures.
Collapse
Affiliation(s)
- Jessica S Poisson
- Department of Chemistry and Biomolecular Sciences , University of Ottawa , Ottawa , Ontario K1N 6N5 , Canada
| | - Jason P Acker
- Canadian Blood Services , Centre for Innovation , Edmonton , Alberta T6G 2R8 , Canada
- Department of Laboratory Medicine and Pathology , University of Alberta , Edmonton , Alberta T6G 2R3 , Canada
| | - Jennie G Briard
- Department of Chemistry and Biomolecular Sciences , University of Ottawa , Ottawa , Ontario K1N 6N5 , Canada
| | - Julia E Meyer
- Department of Chemistry and Biomolecular Sciences , University of Ottawa , Ottawa , Ontario K1N 6N5 , Canada
| | - Robert N Ben
- Department of Chemistry and Biomolecular Sciences , University of Ottawa , Ottawa , Ontario K1N 6N5 , Canada
| |
Collapse
|
26
|
Yui H, Morisaku T, Suzuki A. Vibrational spectroscopic study on the phase transition of water in nanospaces and at interfaces. SURF INTERFACE ANAL 2018. [DOI: 10.1002/sia.6599] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hiroharu Yui
- Department of Chemistry, Faculty of Science; Tokyo University of Science; Tokyo 162-8601 Japan
- Water Frontier Science and Technology Research Center; Research Institute for Science and Technology, Tokyo University of Science; Tokyo 162-8601 Japan
| | - Toshinori Morisaku
- Water Frontier Science and Technology Research Center; Research Institute for Science and Technology, Tokyo University of Science; Tokyo 162-8601 Japan
| | - Akira Suzuki
- Department of Chemistry, Faculty of Science; Tokyo University of Science; Tokyo 162-8601 Japan
| |
Collapse
|
27
|
Rutt T, Eskandari N, Zhurova M, Elliott JAW, McGann LE, Acker JP, Nychka JA. Thermal expansion of substrate may affect adhesion of Chinese hamster fibroblasts to surfaces during freezing. Cryobiology 2018; 86:134-139. [PMID: 30312591 DOI: 10.1016/j.cryobiol.2018.10.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 10/01/2018] [Accepted: 10/08/2018] [Indexed: 12/22/2022]
Abstract
Despite success in cryopreservation of cells in suspension, cryopreservation of cells in monolayers is still challenging. One of the major problems is detachment of the cells from the substrate which occurs during cryopreservation. We hypothesized that this detachment may be due to a mismatch in the coefficient of linear thermal expansion αL between glass and the frozen cell layer which manifests as residual stress and stress relaxation. This mismatch results in a difference between the thermal expansion of ice and glass as they undergo temperature changes. Rinzl plastic coverslips were selected as a possible substitute for glass because Rinzl has an αL (60 × 10-6/K) similar to that of ice (51 × 10-6/K) whereas glass has a much lower αL (5 × 10-6/K). V79-4 Chinese hamster fibroblasts were cultured on both glass and Rinzl coverslips until confluent and the area of coverage was measured before and after freezing at -9 °C. The glass coverslips showed significant loss of cells (coverage = 77.9 ± 8.0%) compared with Rinzl (coverage = 97.9 ± 1.4%). We concluded that Rinzl coverslips may improve cell attachment in future monolayer cryopreservation experiments.
Collapse
Affiliation(s)
- Taylor Rutt
- Chemical and Materials Engineering, University of Alberta, Edmonton, AB, Canada
| | - Nasim Eskandari
- Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - Maria Zhurova
- Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - Janet A W Elliott
- Chemical and Materials Engineering, University of Alberta, Edmonton, AB, Canada; Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - Locksley E McGann
- Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - Jason P Acker
- Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - John A Nychka
- Chemical and Materials Engineering, University of Alberta, Edmonton, AB, Canada.
| |
Collapse
|
28
|
Sultana T, Lee J, Park J, Lee S. Supercooling Storage for the Transplantable Sources From the Rat and the Rabbit: A Preliminary Report. Transplant Proc 2018; 50:1178-1182. [DOI: 10.1016/j.transproceed.2018.01.046] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 01/22/2018] [Indexed: 12/31/2022]
|
29
|
Gastal G, Alves B, Alves K, Paiva S, de Tarso S, Ishak G, Bashir S, Gastal E. Effects of Cryoprotectant Agents on Equine Ovarian Biopsy Fragments in Preparation for Cryopreservation. J Equine Vet Sci 2017. [DOI: 10.1016/j.jevs.2016.03.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
30
|
Weng L, Tessier SN, Smith K, Edd JF, Stott SL, Toner M. Bacterial Ice Nucleation in Monodisperse D2O and H2O-in-Oil Emulsions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:9229-36. [PMID: 27495973 PMCID: PMC5501280 DOI: 10.1021/acs.langmuir.6b02212] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Ice nucleation is of fundamental significance in many areas, including atmospheric science, food technology, and cryobiology. In this study, we investigated the ice-nucleation characteristics of picoliter-sized drops consisting of different D2O and H2O mixtures with and without the ice-nucleating bacteria Pseudomonas syringae. We also studied the effects of commonly used cryoprotectants such as ethylene glycol, propylene glycol, and trehalose on the nucleation characteristics of D2O and H2O mixtures. The results show that the median freezing temperature of the suspension containing 1 mg/mL of a lyophilized preparation of P. syringae is as high as -4.6 °C for 100% D2O, compared to -8.9 °C for 100% H2O. As the D2O concentration increases every 25% (v/v), the profile of the ice-nucleation kinetics of D2O + H2O mixtures containing 1 mg/mL Snomax shifts by about 1 °C, suggesting an ideal mixing behavior of D2O and H2O. Furthermore, all of the cryoprotectants investigated in this study are found to depress the freezing phenomenon. Both the homogeneous and heterogeneous freezing temperatures of these aqueous solutions depend on the water activity and are independent of the nature of the solute. These findings enrich our fundamental knowledge of D2O-related ice nucleation and suggest that the combination of D2O and ice-nucleating agents could be a potential self-ice-nucleating formulation. The implications of self-nucleation include a higher, precisely controlled ice seeding temperature for slow freezing that would significantly improve the viability of many ice-assisted cryopreservation protocols.
Collapse
Affiliation(s)
- Lindong Weng
- Center for Engineering in Medicine, BioMEMS Resource Center, Harvard Medical School, Boston, Massachusetts 02129, United States
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, United States
| | - Shannon N. Tessier
- Center for Engineering in Medicine, BioMEMS Resource Center, Harvard Medical School, Boston, Massachusetts 02129, United States
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, United States
- Shriners Hospital for Children, Boston, Massachusetts 02114, United States
| | - Kyle Smith
- Center for Engineering in Medicine, BioMEMS Resource Center, Harvard Medical School, Boston, Massachusetts 02129, United States
| | - Jon F. Edd
- Center for Engineering in Medicine, BioMEMS Resource Center, Harvard Medical School, Boston, Massachusetts 02129, United States
| | - Shannon L. Stott
- Center for Engineering in Medicine, BioMEMS Resource Center, Harvard Medical School, Boston, Massachusetts 02129, United States
- Massachusetts General Hospital Cancer Center, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02129, United States
- Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, United States
| | - Mehmet Toner
- Center for Engineering in Medicine, BioMEMS Resource Center, Harvard Medical School, Boston, Massachusetts 02129, United States
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, United States
- Shriners Hospital for Children, Boston, Massachusetts 02114, United States
- Corresponding Author:
| |
Collapse
|
31
|
Marquez-Curtis LA, Sultani AB, McGann LE, Elliott JA. Beyond membrane integrity: Assessing the functionality of human umbilical vein endothelial cells after cryopreservation. Cryobiology 2016; 72:183-90. [DOI: 10.1016/j.cryobiol.2016.05.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Revised: 05/06/2016] [Accepted: 05/11/2016] [Indexed: 10/21/2022]
|
32
|
Reardon AJF, Elliott JAW, McGann LE. Investigating membrane and mitochondrial cryobiological responses of HUVEC using interrupted cooling protocols. Cryobiology 2015; 71:306-17. [PMID: 26254036 DOI: 10.1016/j.cryobiol.2015.08.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 07/23/2015] [Accepted: 08/03/2015] [Indexed: 11/26/2022]
Abstract
The success of cryopreservation protocols is largely based on membrane integrity assessments after thawing, since membrane integrity can be considered to give an upper limit in assessment of cell viability and the plasma membrane is considered to be a primary site of cryoinjury. However, the exposure of cells to conditions associated with low temperatures can induce injury to cellular structure and function that may not be readily identified by membrane integrity alone. Interrupted cooling protocols (including interrupted slow cooling without a hold time (graded freezing), and interrupted rapid cooling with a hold time (two-step freezing)), can yield important information about cryoinjury by separating the damage that occurs upon cooling to (and possibly holding at) a critical intermediate temperature range from the damage that occurs upon plunging to the storage temperature (liquid nitrogen). In this study, we used interrupted cooling protocols in the absence of cryoprotectant to investigate the progression of damage to human umbilical vein endothelial cells (HUVEC), comparing an assessment of membrane integrity with a mitochondrial polarization assay. Additionally, the membrane integrity response of HUVEC to interrupted cooling was investigated as a function of cooling rate (for interrupted slow cooling) and hold time (for interrupted rapid cooling). A key finding of this work was that under slow cooling conditions which resulted in a large number of membrane intact cells immediately post thaw, mitochondria are predominantly in a non-functional depolarized state. This study, the first to look directly at mitochondrial polarization throughout interrupted cooling profiles and a detailed study of HUVEC response, highlights the complexity of the progression of cell damage, as the pattern and extent of cell injury throughout the preservation process differs by injury site.
Collapse
Affiliation(s)
- Anthony J F Reardon
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - 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.
| | - Locksley E McGann
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| |
Collapse
|