1
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Zalomova LV, Fesenko EE. FBS-based cryoprotective compositions for effective cryopreservation of gut microbiota and key intestinal microorganisms. BMC Res Notes 2024; 17:168. [PMID: 38898515 PMCID: PMC11188276 DOI: 10.1186/s13104-024-06836-2] [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: 10/12/2023] [Accepted: 06/17/2024] [Indexed: 06/21/2024] Open
Abstract
OBJECTIVE The need for innovative techniques to preserve microbiota for extended periods, while maintaining the species composition and quantitative balance of the bacterial community, is becoming increasingly important. To address this need, we propose an efficient approach to cryopreserve human gut microbiota using a two-component cryoprotective composition comprising fetal bovine serum (FBS) and 5% dimethyl sulfoxide (DMSO). Fetal serum is a commonly utilized component in the freezing media for eukaryotic cells, however, its effects on prokaryotic cells have not been extensively researched. RESULTS In our study, we demonstrated the high efficiency of using a two-component cryoprotective medium, FBS + 5% DMSO, for cryopreservation of human gut microbiota using three different methods. According to the obtained results, the intact donor microbiota was preserved at a level of 85 ± 4% of the initial composition based on fluorescent analysis using the LIVE/DEAD test. No differences in survival were observed when comparing with pure DMSO and FBS media. The photometric measurement method for growth of aerobic bacteria (A. johnsoni), facultative anaerobes (E. coli, E. faecalis), microaerophilic (L. plantarum), and obligate anaerobic bacterial cultures (E. barkeri, B. breve) also demonstrated high viability rates of 94-98% in the two-component protective medium, reaching intact control levels. However, for anaerobic microflora representatives, serum proved to be a more suitable cryoprotectant. Also, we demonstrated that using cryoprotective media with 50-75% FBS content is enough to preserve a significant level of bacterial cell viability, from an economic standpoint.
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Affiliation(s)
- Lyubov V Zalomova
- Institute of Cell Biophysics PSCBR RAS, Moscow Region, Institutskaya Str., 3, Pushchino, 142290, Russia.
| | - Eugeny E Fesenko
- Institute of Cell Biophysics PSCBR RAS, Moscow Region, Institutskaya Str., 3, Pushchino, 142290, Russia
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2
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Patel M, Vernon B, Jeong B. Low-Molecular-Weight PEGs for Cryopreservation of Stem Cell Spheroids. Biomater Res 2024; 28:0037. [PMID: 38845843 PMCID: PMC11156479 DOI: 10.34133/bmr.0037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Accepted: 05/05/2024] [Indexed: 06/09/2024] Open
Abstract
Stem cell spheroids (SCSs) are a valuable tool in stem cell research and regenerative medicine. SCSs provide a platform for stem cell behavior in a more biologically relevant context with enhanced cell-cell communications. In this study, we investigated the recovery of SCSs after cryopreservation at -196 °C for 7 days. Prior to cryopreservation, the SCSs were preincubated for 0 h (no preincubation), 2 h, 4 h, and 6 h at 37 °C in the presence of low-molecular-weight poly(ethylene glycol) (PEG) with molecular weights of 200, 400, and 600 Da. The recovery rate of SCSs was markedly affected by both the PEG molecular weight and the preincubation time. Specifically, when SCSs were preincubated with a PEG200 solution for 2 to 6 h, it significantly enhanced the recovery rate of the SCSs. Internalization of PEG200 through simple diffusion into the SCSs may be the cryoprotective mechanism. The PEG200 diffuses into the SCSs, which not only suppresses osmotic pressure development inside the cell but also inhibits ice formation. The recovered SCSs demonstrated both fusibility and capabilities for proliferation and differentiation comparable to SCSs recovered after dimethyl sulfoxide 10% cryopreservation. This study indicates that PEG200 serves as an effective cryoprotectant for SCSs. A simple preincubation procedure in the presence of the polymer greatly improves the recovery rate of SCSs from cryopreservation.
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Affiliation(s)
- Madhumita Patel
- Department of Chemistry and Nanoscience,
Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Brent Vernon
- School of Biological and Health Systems Engineering,
Arizona State University, Tempe, AZ 85287-9709, USA
| | - Byeongmoon Jeong
- Department of Chemistry and Nanoscience,
Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
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3
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Kostelnik CJ, Crouse KJ, Goldsmith JD, Eberth JF. Impact of cryopreservation on elastomuscular artery mechanics. J Mech Behav Biomed Mater 2024; 154:106503. [PMID: 38522154 DOI: 10.1016/j.jmbbm.2024.106503] [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: 01/19/2024] [Revised: 03/04/2024] [Accepted: 03/08/2024] [Indexed: 03/26/2024]
Abstract
Low temperatures slow or halt undesired biological and chemical processes, protecting cells, tissues, and organs during storage. Cryopreservation techniques, including controlled media exchange and regulated freezing conditions, aim to mitigate the physical consequences of freezing. Dimethyl sulfoxide (DMSO), for example, is a penetrating cryoprotecting agent (CPA) that minimizes ice crystal growth by replacing intracellular water, while polyvinyl alcohol (PVA) is a nonpenetrating CPA that prevents recrystallization during thawing. Since proteins and ground substance dominate the passive properties of soft biological tissues, we studied how different freezing rates, storage temperatures, storage durations, and the presence of cryoprotecting agents (5% [v/v] DMSO + 1 mg/mL PVA) impact the histomechanical properties of the internal thoracic artery (ITA), a clinically relevant blood vessel with both elastic and muscular characteristics. Remarkably, biaxial mechanical analyses failed to reveal significant differences among the ten groups tested, suggesting that mechanical properties are virtually independent of the cryopreservation technique. Scanning electron microscopy revealed minor CPA-independent delamination in rapidly frozen samples, while cryoprotected ITAs had better post-thaw viability than their unprotected counterparts using methyl thiazole-tetrazolium (MTT) metabolic assays, especially when frozen at a controlled rate. These results can be used to inform ongoing and future studies in vascular engineering, physiology, and mechanics.
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Affiliation(s)
- Colton J Kostelnik
- Department of Aerospace Engineering and Engineering Mechanics, The University of Texas at Austin, Austin, TX, USA; Biomedical Engineering Program, University of South Carolina, Columbia, SC, USA
| | - Kiersten J Crouse
- Mechanical Engineering Department, University of South Carolina, Columbia, SC, USA
| | - Jackson D Goldsmith
- Mechanical Engineering Department, University of South Carolina, Columbia, SC, USA
| | - John F Eberth
- Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA, USA.
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4
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Marton HL, Bhatt A, Sagona AP, Kilbride P, Gibson MI. Screening of Hydrophilic Polymers Reveals Broad Activity in Protecting Phages during Cryopreservation. Biomacromolecules 2024; 25:413-424. [PMID: 38124388 PMCID: PMC10777348 DOI: 10.1021/acs.biomac.3c01042] [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: 09/28/2023] [Revised: 12/01/2023] [Accepted: 12/01/2023] [Indexed: 12/23/2023]
Abstract
Bacteriophages have many biotechnological and therapeutic applications, but as with other biologics, cryopreservation is essential for storage and distribution. Macromolecular cryoprotectants are emerging for a range of biologics, but the chemical space for polymer-mediated phage cryopreservation has not been explored. Here we screen the cryoprotective effect of a panel of polymers against five distinct phages, showing that nearly all the tested polymers provide a benefit. Exceptions were poly(methacrylic acid) and poly(acrylic acid), which can inhibit phage-infection with bacteria, making post-thaw recovery challenging to assess. A particular benefit of a polymeric cryopreservation formulation is that the polymers do not function as carbon sources for the phage hosts (bacteria) and hence do not interfere with post-thaw measurements. This work shows that phages are amenable to protection with hydrophilic polymers and opens up new opportunities for advanced formulations for future phage therapies and to take advantage of the additional functionality brought by the polymers.
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Affiliation(s)
- Huba L. Marton
- Department
of Chemistry, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Apoorva Bhatt
- School
of Biosciences, University of Birmingham, Birmingham, B15 2TT, United Kingdom
- Institute
of Microbiology and Infection, University
of Birmingham, Birmingham, B15 2TT, United
Kingdom
| | - Antonia P. Sagona
- School
of Life Sciences, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Peter Kilbride
- Asymptote,
Cytiva, Chivers Way, Cambridge CB24 9BZ, United Kingdom
| | - Matthew I. Gibson
- Department
of Chemistry, University of Warwick, Coventry, CV4 7AL, United Kingdom
- Warwick
Medical School, University of Warwick, Coventry, CV4 7AL, United Kingdom
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
- Manchester
Institute of Biotechnology, University of
Manchester, 131 Princess
Street, Manchester, M1
7DN, United Kingdom
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5
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Jiang P, Li Q, Liu B, Liang W. Effect of cryoprotectant-induced intracellular ice formation and crystallinity on bactria during cryopreservation. Cryobiology 2023; 113:104786. [PMID: 37863380 DOI: 10.1016/j.cryobiol.2023.104786] [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: 04/06/2023] [Revised: 10/13/2023] [Accepted: 10/16/2023] [Indexed: 10/22/2023]
Abstract
Cryopreservation is widely used for the long-term storage of bacteria. Glycerol is one of the traditional cryoprotectants used widely to prevent cryoinjury during the cryopreservation of bacteria,although it may be toxic to the cells. To overcome these issues, synthetic antifreeze polymers are also used as cryoprotectants to inhibit ice formation. In the study, we compared the performance of various antifreeze synthetic polymers including poly(vinyl alcohol) (PVA), poly(vinylpyrrolidone), poly(ethylene glycol), and dextran with glycerol, among which PVA performed best on decreasing the ice growth rate.The impacts of glycerol, trehalose, combined with PVA on the survival of S. thermophilus were also explored. Notably,. S. thermophilus stored in 100 mg/mL trehalose and 1 mg/mL PVA +50 mg/mL trehalose combo showed significantly enhanced survival when compared with those in traditional cryoprotectant (20% [v/v] glycerol), which achieved the survival percentage of only 41.03 ± 0.09%. The effects of the freezing temperature and crystallinity on the survival of S. thermophilus were elucidated.
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Affiliation(s)
- Pei Jiang
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qin Li
- Department of Obstetrics and Gynecology, Shanghai Changhai Hospital, Shanghai, China
| | - Baolin Liu
- Institute of Biothermal and Technology, University of Shanghai for Science and Technology, Shanghai, China
| | - Wei Liang
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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6
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Zihan S, Lu L, Tao W, Bolin Z, Hongfei Z. Starch nanoparticles as a new ice crystal nucleator in Lactobacillus bulgaricus CICC 6097 cryoprotection. Int J Biol Macromol 2023; 251:126395. [PMID: 37595719 DOI: 10.1016/j.ijbiomac.2023.126395] [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: 04/17/2023] [Revised: 05/22/2023] [Accepted: 08/15/2023] [Indexed: 08/20/2023]
Abstract
This work aimed at studying the cryoprotective effect of starch nanoparticles (SNPs) as ice nucleators on Lactobacillus bulgaricus CICC 6097 and exploring the protective mechanism. SNPs with a diameter of 363 nm were obtained, which possessed special properties to enhance ice nucleation and blunt ice crystals edges, and can be wrapped around the surface of bacteria form a protective barrier, thus maintaining the integrity of cell membranes and improving the survivability of L. bulgaricus CICC 6097 from 36.09% to 75.56%. However, SNCs solution formed ice crystals with obvious spikes during freezing, which was harmful to bacteria survival. Therefore, SNPs addition is a possible strategy for increasing viable cell counts during freezing. To the best of our knowledge, this report is the first to demonstrate the cryoprotective effect of ice nucleator on lactic acid bacteria.
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Affiliation(s)
- Sun Zihan
- College of Biological Science & Biotechnology, Beijing Key Laboratory of Forest Food Processing and Safety, Beijing Forestry University, Beijing 100083, China
| | - Liu Lu
- College of Biological Science & Biotechnology, Beijing Key Laboratory of Forest Food Processing and Safety, Beijing Forestry University, Beijing 100083, China
| | - Wang Tao
- College of Biological Science & Biotechnology, Beijing Key Laboratory of Forest Food Processing and Safety, Beijing Forestry University, Beijing 100083, China
| | - Zhang Bolin
- College of Biological Science & Biotechnology, Beijing Key Laboratory of Forest Food Processing and Safety, Beijing Forestry University, Beijing 100083, China
| | - Zhao Hongfei
- College of Biological Science & Biotechnology, Beijing Key Laboratory of Forest Food Processing and Safety, Beijing Forestry University, Beijing 100083, China.
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7
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Dissanayake R, Combita D, Ahmed M. Enhanced Cryopreservation Efficacies of Ice Recrystallization Inhibiting Nanogels. ACS APPLIED MATERIALS & INTERFACES 2023; 15:45689-45700. [PMID: 37729594 DOI: 10.1021/acsami.3c10369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/22/2023]
Abstract
Development of new cryopreservation technologies holds significant potential to revolutionize the fields of cell culture, tissue engineering, assisted reproduction, and transfusion medicine. The current gold standard small-cell permeating cryopreservation agents (CPAs) demonstrate promising cryopreservation efficacies but are cytotoxic and immunogenic at the concentrations required for cryopreservation applications. In comparison, new cell impermeable CPAs of nanodimensions demonstrate outstanding potential to overcome the drawbacks of existing CPAs. In this study, we report the synthesis of vitamin B5 analogous methacrylamide (B5AMA)-incorporated nanogels as a potential solution to address the commonly observed limitations of existing CPAs. The stimuli-responsive poly(B5AMA) nanogels prepared by radical polymerization demonstrated significant ice recrystallization inhibition efficacies and showed either superior or comparable cryopreservation efficacies compared to the traditional cryoprotectant DMSO/glycerol in both eukaryotic and prokaryotic cells.
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Affiliation(s)
- Ranga Dissanayake
- Department of Chemistry, University of Prince Edward Island 550 University Ave. Charlottetown, Prince Edward C1A 4P3, Canada
| | - Diego Combita
- Department of Chemistry, University of Prince Edward Island 550 University Ave. Charlottetown, Prince Edward C1A 4P3, Canada
| | - Marya Ahmed
- Department of Chemistry, University of Prince Edward Island 550 University Ave. Charlottetown, Prince Edward C1A 4P3, Canada
- Faculty of Sustainable Design Engineering, University of Prince Edward Island 550 University Ave. Charlottetown, Prince Edward C1A 4P3, Canada
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8
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Guo N, Song Y, Yan J, Jiang M, Xu Y, Li Z, Wei Q. The Effect of Cryopreservation on the Survival of Nocardia farcinica and Yersinia pestis vaccine strains. Biopreserv Biobank 2023; 21:397-406. [PMID: 36126300 DOI: 10.1089/bio.2022.0049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Pathogenic microorganisms are valuable biological resources, closely related to biosecurity, human health, environmental protection, and renewable energy. It is very important to properly preserve the microbial resources by methods to maintain the purity, viability, and integrity, and to avoid prolonged degradation. The present work aims to explore the cryopreservation technology of Nocardia farcinica (Gram-positive bacteria) and Yersinia pestis vaccine strains (Gram-negative bacteria). The effects of cryoprotectants (CPAs), freezing temperature, and freeze-thaw cycles on the two bacteria in the cryopreservation process were studied. The results showed that the addition of CPAs (glycerol, propylene glycol, sucrose, glucose, l-carnitine, l-proline, and skim milk) significantly enhanced the survival rates of the N. farcinica and Y. pestis vaccine strains. However, high concentrations of CPAs can produce biochemical toxicity in the two pathogens. The utilization of composite CPAs not only reduced the toxicity but also improved the survival rates of samples during cryopreservation. The optimal composite CPA for N. farcinica is 0.292 M sucrose, 0.62 M l-carnitine, and 2.82 M glycerol. The optimal composite CPA for Y. pestis is 0.62 M l-carnitine, 8.46 M glycerin, and 0.292 M sucrose. The results showed that the quality of the strains stored at -80°C and -196°C was better. For the case of freeze-thaw cycles, the two pathogens have different degrees of reduction, and the survival rate of Y. pestis decreased more than that of N. farcinica. The uniform distribution of bacteria in CPAs can form uniform nucleation sites in the solution system, which is beneficial to the cryopreservation of strains, as can be seen from the experimental results from a differential scanning calorimeter. This study may provide a reference for better preservation of precious natural biological resources of pathogenic microorganisms.
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Affiliation(s)
- Ning Guo
- Institute of Biothermal Science & Technology, University of Shanghai for Science and Technology, Shanghai, China
| | - Yang Song
- National Pathogen Resource Center (NPRC), Chinese Center for Disease Control and Prevention, Beijing, China
| | - Jianing Yan
- Institute of Biothermal Science & Technology, University of Shanghai for Science and Technology, Shanghai, China
| | - Mengnan Jiang
- National Pathogen Resource Center (NPRC), Chinese Center for Disease Control and Prevention, Beijing, China
| | - Yi Xu
- Institute of Biothermal Science & Technology, University of Shanghai for Science and Technology, Shanghai, China
| | - Zhenjun Li
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Qiang Wei
- National Pathogen Resource Center (NPRC), Chinese Center for Disease Control and Prevention, Beijing, China
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9
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Das Mahanta D, Brown DR, Pezzotti S, Han S, Schwaab G, Shell MS, Havenith M. Local solvation structures govern the mixing thermodynamics of glycerol-water solutions. Chem Sci 2023; 14:7381-7392. [PMID: 37416713 PMCID: PMC10321518 DOI: 10.1039/d3sc00517h] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 06/12/2023] [Indexed: 07/08/2023] Open
Abstract
Glycerol is a major cryoprotective agent and is widely used to promote protein stabilization. By a combined experimental and theoretical study, we show that global thermodynamic mixing properties of glycerol and water are dictated by local solvation motifs. We identify three hydration water populations, i.e., bulk water, bound water (water hydrogen bonded to the hydrophilic groups of glycerol) and cavity wrap water (water hydrating the hydrophobic moieties). Here, we show that for glycerol experimental observables in the THz regime allow quantification of the abundance of bound water and its partial contribution to the mixing thermodynamics. Specifically, we uncover a 1 : 1 connection between the population of bound waters and the mixing enthalpy, which is further corroborated by the simulation results. Therefore, the changes in global thermodynamic quantity - mixing enthalpy - are rationalized at the molecular level in terms of changes in the local hydrophilic hydration population as a function of glycerol mole fraction in the full miscibility range. This offers opportunities to rationally design polyol water, as well as other aqueous mixtures to optimize technological applications by tuning mixing enthalpy and entropy based on spectroscopic screening.
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Affiliation(s)
- Debasish Das Mahanta
- Lehrstuhl für Physikalische Chemie II, Ruhr-Universität Bochum 44780 Bochum Germany
- Department of Physics, Technische Universität Dortmund 44227 Dortmund Germany
| | - Dennis Robinson Brown
- Department of Chemical Engineering, University of California Santa Barbara California 93106-5080 USA
| | - Simone Pezzotti
- Lehrstuhl für Physikalische Chemie II, Ruhr-Universität Bochum 44780 Bochum Germany
| | - Songi Han
- Department of Chemical Engineering, University of California Santa Barbara California 93106-5080 USA
- Department of Chemistry and Biochemistry, University of California Santa Barbara California 93106-9510 USA
| | - Gerhard Schwaab
- Lehrstuhl für Physikalische Chemie II, Ruhr-Universität Bochum 44780 Bochum Germany
| | - M Scott Shell
- Department of Chemical Engineering, University of California Santa Barbara California 93106-5080 USA
| | - Martina Havenith
- Lehrstuhl für Physikalische Chemie II, Ruhr-Universität Bochum 44780 Bochum Germany
- Department of Physics, Technische Universität Dortmund 44227 Dortmund Germany
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10
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Farag H, Peters B. Engulfment Avalanches and Thermal Hysteresis for Antifreeze Proteins on Supercooled Ice. J Phys Chem B 2023. [PMID: 37294871 DOI: 10.1021/acs.jpcb.3c01089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Antifreeze proteins (AFPs) bind to the ice-water surface and prevent ice growth at temperatures below 0 °C through a Gibbs-Thomson effect. Each adsorbed AFP creates a metastable depression on the surface that locally resists ice growth, until ice engulfs the AFP. We recently predicted the susceptibility to engulfment as a function of AFP size, distance between AFPs, and supercooling [ J. Chem. Phys. 2023, 158, 094501]. For an ensemble of AFPs adsorbed on the ice surface, the most isolated AFPs are the most susceptible, and when an isolated AFP gets engulfed, its former neighbors become more isolated and more susceptible to engulfment. Thus, an initial engulfment event can trigger an avalanche of subsequent engulfment events, leading to a sudden surge of unrestrained ice growth. This work develops a model to predict the supercooling at which the first engulfment event will occur for an ensemble of randomly distributed AFP pinning sites on an ice surface. Specifically, we formulate an inhomogeneous survival probability that accounts for the AFP coverage, the distribution of AFP neighbor distances, the resulting ensemble of engulfment rates, the ice surface area, and the cooling rate. We use the model to predict thermal hysteresis trends and compare with experimental data.
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Affiliation(s)
- Hossam Farag
- Nuclear, Plasma, and Radiological Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Baron Peters
- Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
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11
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William N, Mangan S, Ben RN, Acker JP. Engineered Compounds to Control Ice Nucleation and Recrystallization. Annu Rev Biomed Eng 2023; 25:333-362. [PMID: 37104651 DOI: 10.1146/annurev-bioeng-082222-015243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
One of the greatest concerns in the subzero storage of cells, tissues, and organs is the ability to control the nucleation or recrystallization of ice. In nature, evidence of these processes, which aid in sustaining internal temperatures below the physiologic freezing point for extended periods of time, is apparent in freeze-avoidant and freeze-tolerant organisms. After decades of studying these proteins, we now have easily accessible compounds and materials capable of recapitulating the mechanisms seen in nature for biopreser-vation applications. The output from this burgeoning area of research can interact synergistically with other novel developments in the field of cryobiology, making it an opportune time for a review on this topic.
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Affiliation(s)
- Nishaka William
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada;
| | - Sophia Mangan
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Rob N Ben
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Jason P Acker
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada;
- Innovation and Portfolio Management, Canadian Blood Services, Edmonton, Alberta, Canada
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12
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Burkey AA, Ghousifam N, Hillsley AV, Brotherton ZW, Rezaeeyazdi M, Hatridge TA, Harris DT, Sprague WW, Sandoval BE, Rosales AM, Rylander MN, Lynd NA. Synthesis of Poly(allyl glycidyl ether)-Derived Polyampholytes and Their Application to the Cryopreservation of Living Cells. Biomacromolecules 2023; 24:1475-1482. [PMID: 36780271 DOI: 10.1021/acs.biomac.2c01488] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
Through the postpolymerization modification of poly(allyl glycidyl ether) (PAGE), a functionalizable polyether with a poly(ethylene oxide) backbone, we engineered a new class of highly tunable polyampholyte materials. These polyampholytes can be synthesized to have several useful properties, including low cytotoxicity and pH-responsive coacervate formation. In this study, we used PAGE-based polyampholytes (PAGE-PAs) for the cryopreservation of mammalian cell suspensions. Typically, dimethyl sulfoxide (DMSO) is the cryoprotectant used for preserving mammalian cells, but DMSO suffers from key drawbacks including toxicity and difficult post-thaw removal that motivates the development of new materials and methods. Toxicity and post-thaw survival were dependent on PAGE-PA composition with the highest immediate post-thaw survival for normal human dermal fibroblasts occurring for the least toxic PAGE-PA at a cation/anion ratio of 35:65. With low toxicity, the PAGE-PA concentration could be increased in order to increase immediate post-thaw survival of the immortalized mouse embryonic fibroblasts (NIH/3T3). While immediate post-thaw viability was achieved using only the PAGE-PAs, long-term cell survival was low, highlighting the challenges involved with the design of cryoprotective polyampholytes. An environment utilizing both PAGE-PAs and DMSO in a cryoprotective solution offered promising post-thaw viabilities exceeding 70%, with long-term metabolic activities comparable to unfrozen cells.
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Affiliation(s)
- Aaron A Burkey
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Neda Ghousifam
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Alexander V Hillsley
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Zachary W Brotherton
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Mahboobeh Rezaeeyazdi
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Taylor A Hatridge
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Dale T Harris
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - William W Sprague
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Brittany E Sandoval
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Adrianne M Rosales
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- Center for Dynamics and Control of Materials, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Marissa Nichole Rylander
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Nathaniel A Lynd
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- Center for Dynamics and Control of Materials, The University of Texas at Austin, Austin, Texas 78712, United States
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13
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Farag H, Peters B. Free energy barriers for anti-freeze protein engulfment in ice: Effects of supercooling, footprint size, and spatial separation. J Chem Phys 2023; 158:094501. [PMID: 36889941 DOI: 10.1063/5.0131983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Anti-freeze proteins (AFPs) protect organisms at freezing conditions by attaching to the ice surface and arresting its growth. Each adsorbed AFP locally pins the ice surface, resulting in a metastable dimple for which the interfacial forces counteract the driving force for growth. As supercooling increases, these metastable dimples become deeper, until metastability is lost in an engulfment event where the ice irreversibly swallows the AFP. Engulfment resembles nucleation in some respects, and this paper develops a model for the "critical profile" and free energy barrier for the engulfment process. Specifically, we variationally optimize the ice-water interface and estimate the free energy barrier as a function of the supercooling, the AFP footprint size, and the distance to neighboring AFPs on the ice surface. Finally, we use symbolic regression to derive a simple closed-form expression for the free energy barrier as a function of two physically interpretable, dimensionless parameters.
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Affiliation(s)
- Hossam Farag
- Nuclear, Plasma, and Radiological Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Baron Peters
- Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
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14
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Chen X, Wu J, Yang F, Zhou M, Wang R, Huang J, Rong Y, Liu J, Wang S. New insight into the mechanism by which antifreeze peptides regulate the physiological function of Streptococcus thermophilus subjected to freezing stress. J Adv Res 2023; 45:127-140. [PMID: 35599106 PMCID: PMC10006524 DOI: 10.1016/j.jare.2022.05.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 04/14/2022] [Accepted: 05/03/2022] [Indexed: 11/20/2022] Open
Abstract
INTRODUCTION Antifreeze peptides regulate the physiological functions of frozen cells and even their apoptosis; however, the mechanisms by which antifreeze peptides regulate these processes remain unclear, although the interactions between cell membranes and ice are well known to be important in this process. OBJECTIVES Our study aims to investigate how antifreeze peptides regulate cell physiological functions during the freezing process. METHODS We investigated the cryoprotective effect of rsfAFP on the physiological functions of S. thermophilus under freezing stress by measuring cellular metabolism activity, intracellular enzyme activity, cell membrane characterization, and cell apoptosis. The mechanism by which rsfAFP impacts S. thermophilus physiological functions under freezing stress was investigated using multispectral techniques and cryo-TEM. RESULTS We show that a recombinant antifreeze peptide (rsfAFP) interacts with the extracellular capsular polysaccharides and peptidoglycan of Streptococcus thermophilus and ice to cover the outer layer of the membrane, forming a dense protective layer that regulates the molecular structure of extracellular ice crystals, which results in reduced extracellular membrane damage, depressed apoptosis and increased intracellular metabolic activity. This interaction mechanism was indicated by the fact that S. thermophilus better maintained its permeability barrier, membrane fluidity, membrane structural integrity, and cytoplasmic membrane potential during freezing stress with rsfAFP treatment. CONCLUSION These results provide new insights into the mechanism by which rsfAFP regulates frozen cellphysiological functionsand apoptosis under freezing stress.
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Affiliation(s)
- Xu Chen
- School of Mechanical Science & Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Jinhong Wu
- Department of Food Science and Engineering, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Fujia Yang
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Mi Zhou
- Department of Food Science and Engineering, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Ruibin Wang
- Instrumental Analysis Center, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jianlian Huang
- Key Laboratory of Refrigeration and Conditioning Aquatic Products Processing of Ministry of Agriculture and Rural Affairs, Xiamen 361022, China
| | - Yuzhi Rong
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, China
| | - Jianhua Liu
- International Faculty of Applied Technology, Yibin University, Yibin, Sichuan 644000, China
| | - Shaoyun Wang
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian 350108, China.
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15
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Patel M, Park JK, Jeong B. Rediscovery of poly(ethylene glycol)s as a cryoprotectant for mesenchymal stem cells. Biomater Res 2023; 27:17. [PMID: 36803669 PMCID: PMC9942331 DOI: 10.1186/s40824-023-00356-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 02/15/2023] [Indexed: 02/22/2023] Open
Abstract
BACKGROUND A medium containing dimethyl sulfoxide (DMSO) (10% v/v) is most widely used for cell cryopreservation at -196 °C. However, residual DMSO consistently raises concerns because of its toxicity; thus, its complete removal process is required. METHOD As biocompatible polymers approved by the Food and Drug Administration for various biomedical applications for humans, poly(ethylene glycol)s (PEGs) with various molecular weights (400, 600, 1 K, 1.5 K, 5 K, 10 K, and 20 K Da) were studied as a cryoprotectant of mesenchymal stem cells (MSCs). Considering the cell permeability difference of PEGs depending on their molecular weight, the cells were preincubated for 0 h (no incubation), 2 h, and 4 h at 37 °C in the presence of PEGs at 10 wt.% before cryopreservation at -196 °C for 7 days. Then, cell recovery was assayed. RESULTS We found that low molecular weight PEGs (400 and 600 Da) exhibit excellent cryoprotecting properties by 2 h preincubation, whereas intermediate molecular weight PEGs (1 K, 1.5 K, and 5 K Da) exhibit their cryoprotecting properties without preincubation. High molecular weight PEGs (10 K and 20 K Da) were ineffective as cryoprotectants for MSCs. Studies on ice recrystallization inhibition (IRI), ice nucleation inhibition (INI), membrane stabilization, and intracellular transport of PEGs suggest that low molecular weight PEGs (400 and 600 Da) exhibit excellent intracellular transport properties, and thus the internalized PEGs during preincubation contribute to the cryoprotection. Intermediate molecular weight PEGs (1 K, 1.5 K, and 5 K Da) worked by extracellular PEGs through IRI, INI, as well as partly internalized PEGs. High molecular weight PEGs (10 K and 20 K Da) killed the cells during preincubation and were ineffective as cryoprotectants. CONCLUSIONS PEGs can be used as cryoprotectants. However, the detailed procedures, including preincubation, should consider the effect of the molecular weight of PEGs. The recovered cells well proliferated and underwent osteo/chondro/adipogenic differentiation similar to the MSCs recovered from the traditional DMSO 10% system.
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Affiliation(s)
- Madhumita Patel
- grid.255649.90000 0001 2171 7754Department of Chemistry and Nanoscience, Ewha Womans University, 52 Ewhayeodae-Gil, Seodaemun-Gu, Seoul, 03760 Korea
| | - Jin Kyung Park
- grid.255649.90000 0001 2171 7754Department of Chemistry and Nanoscience, Ewha Womans University, 52 Ewhayeodae-Gil, Seodaemun-Gu, Seoul, 03760 Korea
| | - Byeongmoon Jeong
- Department of Chemistry and Nanoscience, Ewha Womans University, 52 Ewhayeodae-Gil, Seodaemun-Gu, Seoul, 03760, Korea.
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16
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Wang Z, Valenzuela C, Wu J, Chen Y, Wang L, Feng W. Bioinspired Freeze-Tolerant Soft Materials: Design, Properties, and Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2201597. [PMID: 35971186 DOI: 10.1002/smll.202201597] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 07/12/2022] [Indexed: 06/15/2023]
Abstract
In nature, many biological organisms have developed the exceptional antifreezing ability to survive in extremely cold environments. Inspired by the freeze resistance of these organisms, researchers have devoted extensive efforts to develop advanced freeze-tolerant soft materials and explore their potential applications in diverse areas such as electronic skin, soft robotics, flexible energy, and biological science. Herein, a comprehensive overview on the recent advancement of freeze-tolerant soft materials and their emerging applications from the perspective of bioinspiration and advanced material engineering is provided. First, the mechanisms underlying the freeze tolerance of cold-enduring biological organisms are introduced. Then, engineering strategies for developing antifreezing soft materials are summarized. Thereafter, recent advances in freeze-tolerant soft materials for different technological applications such as smart sensors and actuators, energy harvesting and storage, and cryogenic medical applications are presented. Finally, future challenges and opportunities for the rapid development of bioinspired freeze-tolerant soft materials are discussed.
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Affiliation(s)
- Zhiyong Wang
- School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, China
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, 117583, Singapore
| | - Cristian Valenzuela
- School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, China
| | - Jianhua Wu
- School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, China
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Yuanhao Chen
- School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, China
| | - Ling Wang
- School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, China
- Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China
| | - Wei Feng
- School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, China
- Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China
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17
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Pesenti T, Zhu C, Gonzalez-Martinez N, Tomás RMF, Gibson MI, Nicolas J. Degradable Polyampholytes from Radical Ring-Opening Copolymerization Enhance Cellular Cryopreservation. ACS Macro Lett 2022; 11:889-894. [PMID: 35766585 PMCID: PMC9301905 DOI: 10.1021/acsmacrolett.2c00298] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Macromolecular cryoprotectants based on polyampholytes are showing promise as supplemental cryoprotectants alongside conventional DMSO-based freezing. Here we exploit radical ring-opening (ter)polymerization to access ester-containing cryoprotective polyampholytes, which were shown to be degradable. Using a challenging cell monolayer cryopreservation model, the degradable polyampholytes were found to enhance post-thaw recovery when supplemented into DMSO. This demonstrates that degradable macromolecular cryoprotectants can be developed for application in biotechnology and biomedicine.
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Affiliation(s)
- Théo Pesenti
- Université
Paris-Saclay, CNRS, Institut
Galien Paris-Saclay, 92296 Châtenay-Malabry, France
| | - Chen Zhu
- Université
Paris-Saclay, CNRS, Institut
Galien Paris-Saclay, 92296 Châtenay-Malabry, France
| | - Natalia Gonzalez-Martinez
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, CV4 7AL, Coventry, U.K.
- Division
of Biomedical Sciences, Warwick Medical School, University of Warwick, Gibbet Hill Road, CV4 7AL, Coventry, U.K.
| | - Ruben M. F. Tomás
- Division
of Biomedical Sciences, Warwick Medical School, University of Warwick, Gibbet Hill Road, CV4 7AL, Coventry, U.K.
| | - Matthew I. Gibson
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, CV4 7AL, Coventry, U.K.
- Division
of Biomedical Sciences, Warwick Medical School, University of Warwick, Gibbet Hill Road, CV4 7AL, Coventry, U.K.
| | - Julien Nicolas
- Université
Paris-Saclay, CNRS, Institut
Galien Paris-Saclay, 92296 Châtenay-Malabry, France
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18
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Sepulveda-Medina PI, Wang C, Li R, Fukuto M, Vogt BD. Influence of the Nature of Aliphatic Hydrophobic Physical Crosslinks on Water Crystallization in Copolymer Hydrogels. J Phys Chem B 2022; 126:5544-5554. [PMID: 35833757 DOI: 10.1021/acs.jpcb.2c02438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The local environment within a hydrogel influences the properties of water, including the propensity for ice crystallization. Water-swollen amphiphilic copolymers produce tunable nanoscale environments, which are defined by hydrophobic associations, for the water molecules. Here, the antifreeze properties for equilibrium-swollen amphiphilic copolymers with a common hydrophilic component, hydroxyethyl acrylate (HEA), but associated through crystalline (octadecyl acrylate, ODA) or rubbery (ethylhexyl acrylate, EHA) hydrophobic segments, are examined. Differences in the efficacy of the associations can be clearly enunciated from compositional solubility limits for the copolymers in water (<2.6 mol % ODA vs ≤14 mol % EHA), and these differences can be attributed to the strength of the association. The equilibrium-swollen HEA-ODA copolymers are viscoelastic solids, while the swollen HEA-EHA copolymers are viscoelastic liquids. Cooling these swollen copolymers to nearly 200 K induces some crystallization of the water, where the fraction of water frozen depends on the details of the nanostructure. Decreasing the mean free path of water by increasing the ODA composition from 10 to 25 mol % leads to fractionally more unfrozen water (66-87%). The swollen HEA-EHA copolymers only marginally inhibit ice (<13%) except with 45 mol % EHA, where nearly 60% of the water remains amorphous on cooling to 200 K. In general, the addition of the EHA leads to less effective ice inhibition than analogous covalently crosslinked HEA hydrogels (19.9 ± 1.8%). These results illustrate that fluidity of confining surfaces can provide pathways for critical nuclei to form and crystal growth to proceed.
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Affiliation(s)
- Pablo I Sepulveda-Medina
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, United States
| | - Chao Wang
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, United States
| | - Ruipeng Li
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Masafumi Fukuto
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Bryan D Vogt
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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19
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A novel exopolysaccharide produced by Zygosaccharomyces rouxii with cryoprotective and freeze-drying protective activities. Food Chem 2022; 392:133304. [PMID: 35636192 DOI: 10.1016/j.foodchem.2022.133304] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 04/29/2022] [Accepted: 05/22/2022] [Indexed: 02/08/2023]
Abstract
In the present work, a novel exopolysaccharide EPS-3791 was extracted and purified from a salt-tolerant yeast, Zygosaccharomyces rouxii. Structural analyses showed that EPS-3791 was composed of galactose, glucose and mannose in a molar ration of 1.00: 4.25: 13.30 with a molecular weight of 64.412 kDa. Fourier transform infrared spectroscopy manifested the main functional groups, α- and β- configurations. Methylated analysis indicated T-Manp-(1→, →2)-Glcp-(1 → and → 2,6)-Manp-(1 → were the main linkages. 800 MHz nuclear magnetic resonance spectroscopy demonstrated the EPS-3791 structure of a novel main chain and branched chain. Atomic force microscope and scanning electron microscope revealed a homogeneous and uniform porous structure. In addition, EPS-3791 was proven to have cryoprotective and freeze-drying protective effects on Lactococcus lactis, and exhibited better protective performance than that of trelahose during freeze-drying of L. lactis, suggesting that EPS-3791 could be developed into cryoprotectant or lyoprotectant applied in food industry.
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20
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Delesky EA, Srubar WV. Ice-binding proteins and bioinspired synthetic mimics in non-physiological environments. iScience 2022; 25:104286. [PMID: 35573196 PMCID: PMC9097698 DOI: 10.1016/j.isci.2022.104286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Elizabeth A. Delesky
- Materials Science and Engineering Program, University of Colorado Boulder, Boulder, CO 80309, USA
| | - Wil V. Srubar
- Materials Science and Engineering Program, University of Colorado Boulder, Boulder, CO 80309, USA
- Department of Civil, Environmental and Architectural Engineering, University of Colorado Boulder, ECOT 441 UCB 428, Boulder, CO 80309, USA
- Corresponding author
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21
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Preparation, Characterization, and Mechanism of Antifreeze Peptides from Defatted Antarctic Krill ( Euphausia superba) on Lactobacillus rhamnosus. Molecules 2022; 27:molecules27092771. [PMID: 35566118 PMCID: PMC9104330 DOI: 10.3390/molecules27092771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 04/17/2022] [Accepted: 04/20/2022] [Indexed: 11/17/2022] Open
Abstract
Defatted Antarctic krill powder is the main by-product in the manufacturing of krill oil. Exploring a high value-added approach for utilizing this protein-rich material has received much attention in research and industry. Given this, the preparation and primary characterization of antifreeze peptides from defatted Antarctic krill (AKAPs) were carried out in this study. The cryoprotective effect of AKAPs on Lactobacillus rhamnosus ATCC7469 was also investigated. The results showed that Protamex was the optimum protease for AKAP preparation from defatted Antarctic krill. AKAPs were found to be rich in short peptides, with the MW ranging from 600 to 2000 Da (69.2%). An amino acid composition analysis showed that AKAPs were rich in glutamic acid (18.71%), aspartic acid (12.19%), leucine (7.87%), and lysine (7.61%). After freezing, the relative survival rate of Lactobacillus rhamnosus in the 1.0 mg/mL AKAP-treated group (96.83%) was significantly higher than in the saline group (24.12%) (p < 0.05). AKAPs also retarded the loss of acidifying activity of L. rhamnosus after freezing. AKAPs showed even better cryoprotective activity than three commercial cryoprotectants (sucrose, skim milk, and glycerol). In addition, AKAPs significantly alleviated the decrease in β-galactosidase and lactic dehydrogenase activities of L. rhamnosus (p < 0.05). Furthermore, AKAPs effectively protected the integrity of L. rhamnosus cell membranes from freezing damage and alleviated the leakage of intracellular substances. These findings demonstrate that AKAPs can be a potential cryoprotectant for preserving L. rhamnosus, providing a new way to use defatted Antarctic krill.
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22
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Antifreeze Peptides Preparation from Tilapia Skin and Evaluation of Its Cryoprotective Effect on Lacticaseibacillus rhamnosus. Foods 2022; 11:foods11060857. [PMID: 35327279 PMCID: PMC8953377 DOI: 10.3390/foods11060857] [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: 02/23/2022] [Revised: 03/14/2022] [Accepted: 03/16/2022] [Indexed: 02/04/2023] Open
Abstract
Antifreeze peptides can protect cell membranes and maintain the cell viability of probiotics under cold stress. Given this, antifreeze peptides were prepared from tilapia processing byproducts of tilapia skin by enzymolysis using the response surface methodology (RSM) method. The cryoprotective effects on Lacticaseibacillus rhamnosus ATCC7469 were investigated. Trypsin was selected as the protease for tilapia skin hydrolysis. The optimal hydrolysis conditions consisted of the amount of enzyme (2200 U/g), solid–liquid ratio (1:10, w/v), reaction temperature (49 °C), and reaction time (6.8 h), and the relative survival rate of L. rhamnosus reached 98.32%. Molecular weight (Mw) distribution and peptide sequences of the antifreeze peptides prepared from tilapia skin (APT) under the optimal conditions were analyzed. APT significantly reduced the leakage of extracellular proteins and protected β-galactosidase and lactate dehydrogenase activities of L. rhamnosus. Compared with the saline group, scanning electron microscopy (SEM) observation showed that cells had a more normal, smooth, and entire surface under the protection of APT. These findings indicate that APT can be a new cryoprotectant in preserving probiotics.
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23
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Zhang P, Zou R, Wu S, Meyer LA, Wang J, Kraus T. Gold Nanoprobes Exploring the Ice Structure in the Aqueous Dispersion of Poly(Ethylene Glycol)-Gold Hybrid Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:2460-2466. [PMID: 35167305 DOI: 10.1021/acs.langmuir.1c02783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Ice structures and their formation process are fundamentally important to cryobiology, geoscience, and physical chemistry. In this work, we synthesized gold nanoprobes by grafting water-soluble polyethylene glycol (PEG) onto spherical gold nanoparticles and analyzed the structure of ice formation in the vicinity of the resulting hybrid PEG-Au nanoparticles (AuPEGNPs). Temperature-dependent in situ small-angle X-ray scattering (SAXS) indicated that AuPEGNPs, like PEG, caused the formation of bulk spherulite ice. Unlike for PEG, we observed the formation of lamellar ice with a periodicty of 4.6 nm, which is thermodynamically less stable than the bulk form. The lamellar ice formed after AuPEGNP agglomeration during cooling at -19 °C, and it remained during subsequent heating from -20 to -11 °C and melted at around -10 °C, far below the melting temperature of bulk ice. We explain different effects of AuPEGNP and free PEG on ice formation by the topological differences. The highly concentrated PEG chains on the agglomerated Au cores lead to the formation of PEG-hydrates that assemble into lamellar ice with a periodicity of 4.6 nm.
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Affiliation(s)
- Peng Zhang
- State Key Laboratory of Optoelectronic Materials and Technologies, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Ruike Zou
- State Key Laboratory of Optoelectronic Materials and Technologies, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Shuwang Wu
- Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Lars-Arne Meyer
- INM-Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | - Jianjun Wang
- Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Tobias Kraus
- INM-Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
- Colloid and Interface Chemistry, Saarland University, Campus D2 2, 66123 Saarbrücken, Germany
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24
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Chen X, Wu J, Li X, Yang F, Huang D, Huang J, Wang S, Guyonnet V. Snow flea antifreeze peptide for cryopreservation of lactic acid bacteria. NPJ Sci Food 2022; 6:10. [PMID: 35115563 PMCID: PMC8813996 DOI: 10.1038/s41538-022-00128-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 01/10/2022] [Indexed: 01/10/2023] Open
Abstract
Cryogenic machining is one of the most commonly used techniques for processing and preserving in food industry, and traditional antifreeze agents cannot regulate the mechanical stress damage caused by ice crystals formed during recrystallization or thawing. In this study, we successfully developed an express system of a novel recombinant snow flea antifreeze peptide (rsfAFP), which has significant ice recrystallization inhibition ability, thermal hysteresis activity and alters ice nucleation, thus regulating extracellular ice crystal morphology and recrystallization. We showed that rsfAFP improved the survival rate, acid-producing ability, freezing stability, and cellular metabolism activity of Streptococcus thermophilus. We further showed that rsfAFP interacts with the membrane and ice crystals to cover the outer layer of cells, forming a dense protective layer that maintains the physiological functions of S. thermophilus under freezing stress. These findings provide the scientific basis for using rsfAFP as an effective antifreeze agent for lactic acid bacteria cryopreservation or other frozen food.
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Affiliation(s)
- Xu Chen
- College of Biological Science and Engineering, Fuzhou University, 350108, Fuzhou, Fujian, China.,College of Chemical Engineering, Fuzhou University, 350108, Fuzhou, Fujian, China
| | - Jinhong Wu
- Department of Food Science and Engineering, School of Agriculture and Biology, Shanghai Jiao Tong University, 200240, Shanghai, China
| | - Xiaozhen Li
- College of Biological Science and Engineering, Fuzhou University, 350108, Fuzhou, Fujian, China
| | - Fujia Yang
- College of Biological Science and Engineering, Fuzhou University, 350108, Fuzhou, Fujian, China.,College of Chemical Engineering, Fuzhou University, 350108, Fuzhou, Fujian, China
| | - Dan Huang
- Fujian Provincial Key Laboratory of Frozen Processed Aquatic Products, 361022, Xiamen, China.,Fujian Anjoy Food Co. Ltd, 361022, Xiamen, China
| | - Jianlian Huang
- Fujian Provincial Key Laboratory of Frozen Processed Aquatic Products, 361022, Xiamen, China.,Fujian Anjoy Food Co. Ltd, 361022, Xiamen, China
| | - Shaoyun Wang
- College of Biological Science and Engineering, Fuzhou University, 350108, Fuzhou, Fujian, China.
| | - Vincent Guyonnet
- FFI Consulting Ltd, 2488 Lyn Road, Brockville, ON, K6V 5T3, Canada
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25
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Tessier SN, Haque O, Pendexter CA, Cronin SEJ, Hafiz EOA, Weng L, Yeh H, Markmann JF, Taylor MJ, Fahy GM, Toner M, Uygun K. The role of antifreeze glycoprotein (AFGP) and polyvinyl alcohol/polyglycerol (X/Z-1000) as ice modulators during partial freezing of rat livers. FRONTIERS IN PHYSICS 2022; 10:1033613. [PMID: 37151819 PMCID: PMC10161798 DOI: 10.3389/fphy.2022.1033613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Introduction The current liver organ shortage has pushed the field of transplantation to develop new methods to prolong the preservation time of livers from the current clinical standard of static cold storage. Our approach, termed partial freezing, aims to induce a thermodynamically stable frozen state at high subzero storage temperatures (-10°C to -15°C), while simultaneously maintaining a sufficient unfrozen fraction to limit ice-mediated injury. Methods and results Using glycerol as the main permeating cryoprotectant agent, this research first demonstrated that partially frozen rat livers showed similar outcomes after thawing from either -10°C or -15°C with respect to subnormothermic machine perfusion metrics. Next, we assessed the effect of adding ice modulators, including antifreeze glycoprotein (AFGP) or a polyvinyl alcohol/polyglycerol combination (X/Z-1000), on the viability and structural integrity of partially frozen rat livers compared to glycerol-only control livers. Results showed that AFGP livers had high levels of ATP and the least edema but suffered from significant endothelial cell damage. X/Z-1000 livers had the highest levels of ATP and energy charge (EC) but also demonstrated endothelial damage and post-thaw edema. Glycerol-only control livers exhibited the least DNA damage on Terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) staining but also had the lowest levels of ATP and EC. Discussion Further research is necessary to optimize the ideal ice modulator cocktail for our partial-freezing protocol. Modifications to cryoprotective agent (CPA) combinations, including testing additional ice modulators, can help improve the viability of these partially frozen organs.
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Affiliation(s)
- Shannon N. Tessier
- Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
- Shriners Hospitals for Children, Boston, MA, United States
| | - Omar Haque
- Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
- Shriners Hospitals for Children, Boston, MA, United States
- Department of Surgery, Beth Israel Deaconess Medical Center, Boston, MA, United States
- Department of Surgery, Division of Transplantation, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Casie A. Pendexter
- Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
- Shriners Hospitals for Children, Boston, MA, United States
| | - Stephanie E. J. Cronin
- Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
- Shriners Hospitals for Children, Boston, MA, United States
| | - Ehab O. A. Hafiz
- Department of Electron Microscopy Research, Theodor Bilharz Research Institute, Giza, Egypt
| | - Lindong Weng
- Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
- Shriners Hospitals for Children, Boston, MA, United States
| | - Heidi Yeh
- Department of Surgery, Division of Transplantation, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - James F. Markmann
- Department of Surgery, Division of Transplantation, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Michael J. Taylor
- Sylvatica Biotech Inc, North Charleston, SC, United States
- Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA, United States
| | | | - Mehmet Toner
- Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
- Shriners Hospitals for Children, Boston, MA, United States
- CORRESPONDENCE: Mehmet Toner, , Korkut Uygun,
| | - Korkut Uygun
- Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
- Shriners Hospitals for Children, Boston, MA, United States
- CORRESPONDENCE: Mehmet Toner, , Korkut Uygun,
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26
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Gao S, Zhu K, Zhang Q, Niu Q, Chong J, Ren L, Yuan X. Development of Icephilic ACTIVE Glycopeptides for Cryopreservation of Human Erythrocytes. Biomacromolecules 2021; 23:530-542. [PMID: 34965723 DOI: 10.1021/acs.biomac.1c01372] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Ice formation and recrystallization exert severe impairments to cellular cryopreservation. In light of cell-damaging washing procedures in the current glycerol approach, many researches have been devoted to the development of biocompatible cryoprotectants for optimal bioprotection of human erythrocytes. Herein, we develop a novel ACTIVE glycopeptide of saccharide-grafted ε-poly(L-lysine), that can be credited with adsorption on membrane surfaces, cryopreservation with trehalose, and icephilicity for validity of human erythrocytes. Then, by Borch reductive amination or amidation, glucose, lactose, maltose, maltotriose, or trehalose was tethered to ε-polylysine. The synthesized ACTIVE glycopeptides with intrinsic icephilicity could localize on the membrane surface of human erythrocytes and improve cryopreservation with trehalose, so that remarkable post-thaw cryosurvival of human erythrocytes was achieved with a slight variation in cell morphology and functions. Human erythrocytes (∼50% hematocrit) in cryostores could maintain high cryosurvival above 74%, even after plunged in liquid nitrogen for 6 months. Analyses of differential scanning calorimetry, Raman spectroscopy, and dynamic ice shaping suggested that this cryopreservation protocol combined with the ACTIVE glycopeptide and trehalose could enhance the hydrogen bond network in nonfrozen solutions, resulting in inhibition of recrystallization and growth of ice. Therefore, the ACTIVE glycopeptide can be applied as a trehalose-associated "chaperone", providing a new way to serve as a candidate in glycerol-free human erythrocyte cryopreservation.
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Affiliation(s)
- Shuhui Gao
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Kongying Zhu
- Analysis and Measurement Center, Tianjin University, Tianjin 300072, China
| | - Qifa Zhang
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Qingjing Niu
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | | | - Lixia Ren
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Xiaoyan Yuan
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
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27
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Kamat K, Naullage PM, Molinero V, Peters B. Diffusion Attachment Model for Long Helical Antifreeze Proteins to Ice. Biomacromolecules 2021; 23:513-519. [PMID: 34928587 DOI: 10.1021/acs.biomac.1c01247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Some of the most potent antifreeze proteins (AFPs) are approximately rigid helical structures that bind with one side in contact with the ice surface at specific orientations. These AFPs take random orientations in solution; however, most orientations become sterically inaccessible as the AFP approaches the ice surface. The effect of these inaccessible orientations on the rate of adsorption of AFP to ice has never been explored. Here, we present a diffusion-controlled theory of adsorption kinetics that accounts for these orientational restrictions to predict a rate constant for adsorption (kon, in m/s) as a function of the length and width of the AFP molecules. We find that kon decreases with length and diameter of the AFP and is almost proportional to the inverse of the area of the binding surface. We demonstrate that the restricted orientations create an entropic barrier to AFP adsorption, which we compute to be approximately 7 kBT for most AFPs and up to 9 kBT for Maxi, the largest known AFP. We compare the entropic resistance 1/kon to resistances for diffusion through boundary layers and across typical distances in the extracellular matrix and find that these entropic and diffusion resistances could become comparable in the small confined spaces of biological environments.
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Affiliation(s)
- Kartik Kamat
- Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Pavithra M Naullage
- Department of Chemistry, The University of Utah, Salt Lake City, Utah 84112, United States
| | - Valeria Molinero
- Department of Chemistry, The University of Utah, Salt Lake City, Utah 84112, United States
| | - Baron Peters
- Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.,Department of Chemistry and Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
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28
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Marton HL, Styles KM, Kilbride P, Sagona AP, Gibson MI. Polymer-Mediated Cryopreservation of Bacteriophages. Biomacromolecules 2021; 22:5281-5289. [PMID: 34846863 PMCID: PMC8672357 DOI: 10.1021/acs.biomac.1c01187] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 11/06/2021] [Indexed: 12/11/2022]
Abstract
Bacteriophages (phages, bacteria-specific viruses) have biotechnological and therapeutic potential. To apply phages as pure or heterogeneous mixtures, it is essential to have a robust mechanism for transport and storage, with different phages having very different stability profiles across storage conditions. For many biologics, cryopreservation is employed for long-term storage and cryoprotectants are essential to mitigate cold-induced damage. Here, we report that poly(ethylene glycol) can be used to protect phages from cold damage, functioning at just 10 mg·mL-1 (∼1 wt %) and outperforms glycerol in many cases, which is a currently used cryoprotectant. Protection is afforded at both -20 and -80 °C, the two most common temperatures for frozen storage in laboratory settings. Crucially, the concentration of the polymer required leads to frozen solutions at -20 °C, unlike 50% glycerol (which results in liquid solutions). Post-thaw recoveries close to 100% plaque-forming units were achieved even after 2 weeks of storage with this method and kill assays against their bacterial host confirmed the lytic function of the phages. Initial experiments with other hydrophilic polymers also showed cryoprotection, but at this stage, the exact mechanism of this protection cannot be concluded but does show that water-soluble polymers offer an alternative tool for phage storage. Ice recrystallization inhibiting polymers (poly(vinyl alcohol)) were found to provide no additional protection, in contrast to their ability to protect proteins and microorganisms which are damaged by recrystallization. PEG's low cost, solubility, well-established low toxicity/immunogenicity, and that it is fit for human consumption at the concentrations used make it ideal to help translate new approaches for phage therapy.
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Affiliation(s)
- Huba L. Marton
- Department
of Chemistry, University of Warwick, Coventry CV4 7AL, U.K.
| | - Kathryn M. Styles
- School
of Life Sciences, University of Warwick, Coventry CV4 7AL, U.K.
| | - Peter Kilbride
- Asymptote,
Cytiva, Chivers Way, Cambridge CB24 9BZ, U.K.
| | - Antonia P. Sagona
- School
of Life Sciences, University of Warwick, Coventry CV4 7AL, U.K.
| | - Matthew I. Gibson
- Department
of Chemistry, University of Warwick, Coventry CV4 7AL, U.K.
- Warwick
Medical School, University of Warwick, Coventry CV4 7AL, U.K.
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29
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Lee TW, Lee GW, An S, Seong KY, Lee JS, Yang SY. Enhanced Cellular Cryopreservation by Biopolymer-Associated Suppression of RhoA/ROCK Signaling Pathway. MATERIALS 2021; 14:ma14206056. [PMID: 34683648 PMCID: PMC8540109 DOI: 10.3390/ma14206056] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/05/2021] [Accepted: 10/09/2021] [Indexed: 12/14/2022]
Abstract
With increasing demands on long-term storage of cells, cryopreservation of cells is gaining more importance in cell-based research and applications. Dimethyl sulfoxide (DMSO) is a commonly used chemical cryoprotectant, providing increased cell survival during the freezing process. However, its use is limited in clinical applications due to its low biocompatibility above cryogenic temperatures. Herein, we present a new approach for reducing the use of DMSO in cryopreservation by using biodegradable hyaluronic acids (HAs). By adding HAs into cryoprotectant media containing a low concentration of DMSO, higher cell viability and cell proliferation rate were observed upon thawing after cryopreservation. The HA-supplemented cryopreservation media did not reduce the size of the ice crystal, which significantly influenced cell viability during cell freezing, but decreased the Ras homolog family member A (RhoA)/Rho-associated protein kinase (ROCK) signaling pathway related to apoptosis. The cell-interactive cryoprotectants containing HA can be applied to the development of a new cryoprotectant that reduces the adverse effect of DMSO.
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Affiliation(s)
- Tae Wook Lee
- Department of Biomaterials Science (BK21 Four Program), Life and Industry Convergence Institute, Pusan National University, Miryang 50463, Korea; (T.W.L.); (G.W.L.); (S.A.); (K.-Y.S.)
| | - Gyeong Won Lee
- Department of Biomaterials Science (BK21 Four Program), Life and Industry Convergence Institute, Pusan National University, Miryang 50463, Korea; (T.W.L.); (G.W.L.); (S.A.); (K.-Y.S.)
| | - Seonyeong An
- Department of Biomaterials Science (BK21 Four Program), Life and Industry Convergence Institute, Pusan National University, Miryang 50463, Korea; (T.W.L.); (G.W.L.); (S.A.); (K.-Y.S.)
| | - Keum-Yong Seong
- Department of Biomaterials Science (BK21 Four Program), Life and Industry Convergence Institute, Pusan National University, Miryang 50463, Korea; (T.W.L.); (G.W.L.); (S.A.); (K.-Y.S.)
| | - Jong Soo Lee
- Department of Ophthalmology, College of Medicine, Pusan National University, Busan 49241, Korea
- Medical Research Institute, Pusan National University Hospital, Busan 49241, Korea
- Correspondence: (J.S.L.); (S.Y.Y.)
| | - Seung Yun Yang
- Department of Biomaterials Science (BK21 Four Program), Life and Industry Convergence Institute, Pusan National University, Miryang 50463, Korea; (T.W.L.); (G.W.L.); (S.A.); (K.-Y.S.)
- Correspondence: (J.S.L.); (S.Y.Y.)
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30
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Mehdipour M, Daghigh-Kia H, Najafi A, Martínez-Pastor F. Type III antifreeze protein (AFP) improves the post-thaw quality and in vivo fertility of rooster spermatozoa. Poult Sci 2021; 100:101291. [PMID: 34217904 PMCID: PMC8260870 DOI: 10.1016/j.psj.2021.101291] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 05/18/2021] [Accepted: 05/21/2021] [Indexed: 01/08/2023] Open
Abstract
Antifreeze proteins (AFP) have the potential for improving sperm cryopreservation. We have applied Type III antifreeze protein (AFP3) on the cryopreservation of spermatozoa from broiler breeder roosters, aiming to enhance post-thawing quality and fertility. Semen was extended at 37°C in Lake's extender containing AFP3 at 0.01, 0.1, 1, 5, and 10 µg/mL (no AFP3 as control). Post-thawing sperm assessment included sperm motility (CASA), morphology, membrane functionality by hypoosmotic swelling test (HOST), lipoperoxidation as malondialdehyde (MDA) production, and sperm viability, early apoptosis (phosphatidylserine exposure as annexin V-positive staining in viable spermatozoa), and mitochondrial activity by flow cytometry. Fertility was assessed after artificial insemination (30 hens/treatment). Total and progressive motility, membrane functionality, and mitochondrial activity increased in 0.1 and 1 µg/mL AFP, compared to control and other concentrations, whereas apoptosis was significantly lower. VAP, VSL, and viability were significantly higher for 1 µg/mL AFP3 than with the other treatments except for 0.1 µg/mL (which was not always significantly different from the control or other concentrations), and with abnormal forms being significantly lower. The proportion of fertilized and hatched eggs was also higher for 1 µg/mL AFP3, with 0.1 µg/mL also showing significantly higher results than the control, and no differences with other concentrations). In conclusion, 1 µg/mL AFP3 could improve the post-thawing results of rooster spermatozoa frozen in Lake's extender. According to our results, concentrations between 1 and 0.1 µg/mL could be similarly efficient.
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Affiliation(s)
- Mahdieh Mehdipour
- Department of Animal Science, College of Agriculture, University of Tabriz, Tabriz, Iran
| | - Hossein Daghigh-Kia
- Department of Animal Science, College of Agriculture, University of Tabriz, Tabriz, Iran.
| | - Abouzar Najafi
- Department of Animal and Poultry Science, College of Aburaihan, University of Tehran, Tehran, Iran
| | - Felipe Martínez-Pastor
- Institute of Animal Health and Cattle Development (INDEGSAL) and Department of Molecular Biology (Cell Biology), University of León, León 24071, Spain
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31
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Zalomova LV, Reshetnikov DA, Ugraitskaya SV, Mezhevikina LM, Zagainova AV, Makarov VV, Yudin SM, Fesenko EE. Fetal Serum in Combination with 5% Dimethyl Sulfoxide Efficiently Protects the Human Gut Microbiota during Cryopreservation in Liquid Nitrogen. Biophysics (Nagoya-shi) 2021. [DOI: 10.1134/s0006350921040230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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32
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Murray A, Congdon TR, Tomás RMF, Kilbride P, Gibson MI. Red Blood Cell Cryopreservation with Minimal Post-Thaw Lysis Enabled by a Synergistic Combination of a Cryoprotecting Polyampholyte with DMSO/Trehalose. Biomacromolecules 2021; 23:467-477. [PMID: 34097399 PMCID: PMC7612374 DOI: 10.1021/acs.biomac.1c00599] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
![]()
From trauma wards
to chemotherapy, red blood cells are essential
in modern medicine. Current methods to bank red blood cells typically
use glycerol (40 wt %) as a cryoprotective agent. Although highly
effective, the deglycerolization process, post-thaw, is time-consuming
and results in some loss of red blood cells during the washing procedures.
Here, we demonstrate that a polyampholyte, a macromolecular cryoprotectant,
synergistically enhances ovine red blood cell cryopreservation in
a mixed cryoprotectant system. Screening of DMSO and trehalose mixtures
identified optimized conditions, where cytotoxicity was minimized
but cryoprotective benefit maximized. Supplementation with polyampholyte
allowed 97% post-thaw recovery (3% hemolysis), even under extremely
challenging slow-freezing and -thawing conditions. Post-thaw washing
of the cryoprotectants was tolerated by the cells, which is crucial
for any application, and the optimized mixture could be applied directly
to cells, causing no hemolysis after 1 h of exposure. The procedure
was also scaled to use blood bags, showing utility on a scale relevant
for application. Flow cytometry and adenosine triphosphate assays
confirmed the integrity of the blood cells post-thaw. Microscopy confirmed
intact red blood cells were recovered but with some shrinkage, suggesting
that optimization of post-thaw washing could further improve this
method. These results show that macromolecular cryoprotectants can
provide synergistic benefit, alongside small molecule cryoprotectants,
for the storage of essential cell types, as well as potential practical
benefits in terms of processing/handling.
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Affiliation(s)
- Alex Murray
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K
| | - Thomas R Congdon
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K
| | - Ruben M F Tomás
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K.,Warwick Medical School, University of Warwick, Coventry CV4 7AL, U.K
| | | | - Matthew I Gibson
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K.,Warwick Medical School, University of Warwick, Coventry CV4 7AL, U.K
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33
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Sepulveda-Medina PI, Tyagi M, Wang C, Vogt BD. Water dynamics within nanostructured amphiphilic statistical copolymers from quasielastic neutron scattering. J Chem Phys 2021; 154:154903. [PMID: 33887940 DOI: 10.1063/5.0045341] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Understanding the properties of water under either soft or hard confinement has been an area of great interest, but nanostructured amphiphilic polymers that provide a secondary confinement have garnered significantly less attention. Here, a series of statistical copolymers of 2-hydroxyethyl acrylate (HEA) and 2-(N-ethylperfluorooctane sulfonamido)ethyl methacrylate (FOSM) are swollen to equilibrium in water to form nanostructured physically cross-linked hydrogels to probe the effect of soft confinement on the dynamics of water. Changing the composition of the copolymer from 10 to 21 mol. % FOSM decreases the average size of the assembled FOSM cross-link, but also the spacing between the cross-links in the hydrogels with the mean distance between the FOSM aggregates decreasing from 3.9 to 2.7 nm. The dynamics of water within the hydrogels were assessed with quasielastic neutron scattering. These hydrogels exhibit superior performance for inhibition of water crystallization on supercooling in comparison to analogous hydrogels with different hydrophilic copolymer chemistries. Despite the lower water crystallinity, the self-diffusion coefficient for these hydrogels from the copolymers of HEA and FOSM decreases precipitously below 260 K, which is a counter to the nearly temperature invariant water dynamics reported previously with an analogous hydrogel [Wiener et al., J. Phys. Chem. B 120, 5543 (2016)] that exhibits nearly temperature invariant dynamics to 220 K. These results point to chemistry dependent dynamics of water that is confined within amphiphilic hydrogels, where the interactions of water with the hydrophilic segments can qualitatively alter the temperature dependent dynamics of water in the supercooled state.
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Affiliation(s)
| | - Madhusudan Tyagi
- Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - Chao Wang
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, USA
| | - Bryan D Vogt
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, USA
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34
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Chen J, Qiu T, Guo L, He L, Li X. Topology Reliable LCST-Type Behavior of ABA Triblock Polymer and Influence on Water Condensation and Crystallization. Macromol Rapid Commun 2021; 42:e2100024. [PMID: 33768621 DOI: 10.1002/marc.202100024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 02/15/2021] [Indexed: 01/26/2023]
Abstract
As a kind of smart material, thermoresponsive hydrogels are widely investigated and applied in many fields. Due to the limitation of the freezing temperature of the water, it is a challenge to further broaden their sol-gel transition temperature (Tgel ) range, especially below 0 °C. Herein, the lower critical solution temperature type of amphiphilic ABA triblock copolymers, synthesized via two-step reversible addition-fragmentation chain transfer (RAFT) polymerization is demonstrated. The hydrophilic A-block and the hydrophobic B-block are composed of poly(N,N-dimethylacrylamide) (PDMAA) and poly(diacetone acrylamide) (PDAAM), respectively. The degree of polymerization (DP) of both A-block and B-block shows a significant influence on the Tgel of triblock copolymer dispersion. By changing the length of these two blocks or physically blending these copolymers dispersions, the Tgel can be well adjusted in a temperature range from 45 to -10 °C. Moreover, When the Tgel is higher than 4 °C, the triblock copolymer coatings show a good anti-fogging property. And when the Tgel is around or lower than the freezing temperature of the water, aqueous dispersions of the triblock copolymer have an ice recrystallization inhibition activity, resulting in the decrease of average maximum grain size (MLGS) of ice crystal.
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Affiliation(s)
- Jing Chen
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Teng Qiu
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Longhai Guo
- Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Lifan He
- Beijing Engineering Research Center of Synthesis and Application of Waterborne Polymer, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Xiaoyu Li
- Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
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35
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The atomistic details of the ice recrystallisation inhibition activity of PVA. Nat Commun 2021; 12:1323. [PMID: 33637764 PMCID: PMC7910567 DOI: 10.1038/s41467-021-21717-z] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 02/05/2021] [Indexed: 01/31/2023] Open
Abstract
Understanding the ice recrystallisation inhibition (IRI) activity of antifreeze biomimetics is crucial to the development of the next generation of cryoprotectants. In this work, we bring together molecular dynamics simulations and quantitative experimental measurements to unravel the microscopic origins of the IRI activity of poly(vinyl)alcohol (PVA)-the most potent of biomimetic IRI agents. Contrary to the emerging consensus, we find that PVA does not require a "lattice matching" to ice in order to display IRI activity: instead, it is the effective volume of PVA and its contact area with the ice surface which dictates its IRI strength. We also find that entropic contributions may play a role in the ice-PVA interaction and we demonstrate that small block co-polymers (up to now thought to be IRI-inactive) might display significant IRI potential. This work clarifies the atomistic details of the IRI activity of PVA and provides novel guidelines for the rational design of cryoprotectants.
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36
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Guo N, Wei Q, Xu Y. Optimization of cryopreservation of pathogenic microbial strains. JOURNAL OF BIOSAFETY AND BIOSECURITY 2020. [DOI: 10.1016/j.jobb.2020.11.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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37
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Fayter AE, Hasan M, Congdon TR, Kontopoulou I, Gibson MI. Ice recrystallisation inhibiting polymers prevent irreversible protein aggregation during solvent-free cryopreservation as additives and as covalent polymer-protein conjugates. Eur Polym J 2020; 140:110036. [PMID: 33311718 PMCID: PMC7709485 DOI: 10.1016/j.eurpolymj.2020.110036] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 09/11/2020] [Accepted: 09/15/2020] [Indexed: 01/11/2023]
Abstract
Protein storage and transport is essential to deliver therapies (biologics), enzymes for biotechnological applications, and underpins fundamental structural and molecular biology. To enable proteins to be stored and transported it is often essential to freeze them, requiring cryoprotectants such as glycerol or trehalose. Here we explore the mechanisms by which poly(vinyl alcohol), PVA, a potent ice recrystallisation inhibitor protects proteins during freeze/thaw to enable solvent-free cryopreservation with a focus on comparing mixing, verses polymer-protein conjugation. A panel of poly(vinyl alcohol)s are investigated including commercial, well-defined (from RAFT), and PVA-protein conjugates, to map out PVA's efficacy. Enzymatic activity recovery of lactate dehydrogenase was found to correlate with post-thaw aggregation state (less aggregated protein had greater activity), which was modulated by PVA's ice recrystallisation inhibition activity. This macromolecular cryoprotectant matched the performance of glycerol, but at lower additive concentrations (as low as 1 mg.mL-1). It was also demonstrated that storage at -20 °C, rather than -80 °C was possible using PVA as a cryoprotectant, which is not possible with glycerol storage. A second protein, green-fluorescent protein (GFP), was used to enable screening of molecular weight effects and to obtain PVA-GFP bioconjugates. It was observed that covalent attachment of RAFT-derived PVA showed superior cryoprotectant activity compared to simple mixing of the polymer and protein. These results show that PVA is a real alternative to solvent-based protein storage with potential in biotechnology, food and therapeutics. PVA is already approved for many biomedical applications, is low cost and available on a large scale, making it an ideal cryoprotectant formulation enhancer.
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Affiliation(s)
- Alice E.R. Fayter
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK
| | - Muhammad Hasan
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK
| | - Thomas R. Congdon
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK
| | | | - Matthew I. Gibson
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK
- Warwick Medical School, University of Warwick, Coventry CV4 7AL, UK
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38
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Chen X, Wu J, Cai X, Wang S. Production, structure–function relationships, mechanisms, and applications of antifreeze peptides. Compr Rev Food Sci Food Saf 2020; 20:542-562. [DOI: 10.1111/1541-4337.12655] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 09/10/2020] [Accepted: 09/21/2020] [Indexed: 12/13/2022]
Affiliation(s)
- Xu Chen
- College of Biological Science and Technology Fuzhou University Fuzhou Fujian China
- College of Chemical Engineering Fuzhou University Fuzhou Fujian China
| | - Jinhong Wu
- Department of Food Science and Engineering School of Agriculture and Biology Shanghai Jiao Tong University Shanghai China
| | - Xixi Cai
- College of Biological Science and Technology Fuzhou University Fuzhou Fujian China
| | - Shaoyun Wang
- College of Biological Science and Technology Fuzhou University Fuzhou Fujian China
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39
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William N, Acker JP. Cryoprotectant-dependent control of intracellular ice recrystallization in hepatocytes using small molecule carbohydrate derivatives. Cryobiology 2020; 97:123-130. [PMID: 33007287 DOI: 10.1016/j.cryobiol.2020.09.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 09/25/2020] [Accepted: 09/28/2020] [Indexed: 12/17/2022]
Abstract
To promote the recovery of cells that undergo intracellular ice formation (IIF), it is imperative that the recrystallization of intracellular ice is minimized. Hepatocytes are more prone to IIF than most mammalian cells, and thus we assessed the ability of novel small molecule carbohydrate-based ice recrystallization inhibitors (IRIs) to permeate and function within hepatocytes. HepG2 monolayers were treated with N-(4-chlorophenyl)-d-gluconamide (IRI 1), N-(2-fluorophenyl)-d-gluconamide (IRI 2), or para-methoxyphenyl-β-D-glycoside (IRI 3) and fluorescent cryomicroscopy was used for real time visualization of intracellular ice recrystallization. Both IRI 2 and IRI 3 reduced rates of intracellular recrystallization, whereas IRI 1 did not. IRI 2 and IRI 3, however, demonstrated a marked reduction in efficiency in the presence of the most frequently used permeating cryoprotectants (CPAs): glycerol, propylene glycol (PG), dimethyl sulfoxide (DMSO), and ethylene glycol (EG). Nevertheless, IRI 3 reduced rates of intracellular recrystallization relative to CPA-only controls in the presence of glycerol, PG, and DMSO. Interestingly, IRI preparation in trehalose, a commonly used non-permeating CPA, did not impact the activity of IRI 3. However, trehalose did increase the activity of IRI 1 while decreasing that of IRI 2. While this study suggests that each of these compounds could prove relevant in hepatocyte cryopreservation protocols where IIF would be prominent, CPA-mediated modulation of intracellular IRI activity is apparent and warrants further investigation.
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Affiliation(s)
- Nishaka William
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, T6G 2R3, Canada.
| | - Jason P Acker
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, T6G 2R3, Canada; Centre for Innovation, Canadian Blood Services, 8249 114th Street, Edmonton, AB, T6G 2R8, Canada.
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40
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Qin K, Eschenbrenner C, Ginot F, Dedovets D, Coradin T, Deville S, Fernandes FM. Unveiling Cells' Local Environment during Cryopreservation by Correlative In Situ Spatial and Thermal Analyses. J Phys Chem Lett 2020; 11:7730-7738. [PMID: 32841035 DOI: 10.1021/acs.jpclett.0c01729] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Cryopreservation is the only fully established procedure to extend the lifespan of living cells and tissues, a key to activities spanning from fundamental biology to clinical practice. Despite its prevalence and impact, the central aspects of cryopreservation, such as the cell's physicochemical environment during freezing, remain elusive. Here we address that question by coupling in situ microscopic directional freezing to visualize cells and their surroundings during freezing with the freezing-medium phase diagram. We extract the freezing-medium spatial distribution in cryopreservation, providing a tool to describe the cell vicinity at any point during freezing. We show that two major events define the cells' local environment over time: the interaction with the moving ice front and the interaction with the vitreous moving front, a term we introduce here. Our correlative strategy may be applied to cells relevant to clinical research and practice and may help in the design of new cryoprotective media based on local physicochemical cues.
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Affiliation(s)
- Kankan Qin
- Sorbonne Université, UMR 7574, Laboratoire de Chimie de la Matière Condensée de Paris, F-75005 Paris, France
| | - Corentin Eschenbrenner
- Sorbonne Université, UMR 7574, Laboratoire de Chimie de la Matière Condensée de Paris, F-75005 Paris, France
| | - Felix Ginot
- Laboratoire de Synthèse et Fonctionnalisation des Céramiques, UMR 3080 CNRS/Saint-Gobain CREE, Saint-Gobain Research Provence, 84300 Cavaillon, France
| | - Dmytro Dedovets
- Laboratoire de Synthèse et Fonctionnalisation des Céramiques, UMR 3080 CNRS/Saint-Gobain CREE, Saint-Gobain Research Provence, 84300 Cavaillon, France
| | - Thibaud Coradin
- Sorbonne Université, UMR 7574, Laboratoire de Chimie de la Matière Condensée de Paris, F-75005 Paris, France
| | - Sylvain Deville
- Laboratoire de Synthèse et Fonctionnalisation des Céramiques, UMR 3080 CNRS/Saint-Gobain CREE, Saint-Gobain Research Provence, 84300 Cavaillon, France
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, 69622 Villeurbanne, France
| | - Francisco M Fernandes
- Sorbonne Université, UMR 7574, Laboratoire de Chimie de la Matière Condensée de Paris, F-75005 Paris, France
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41
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Zalomova LV, Reshetnikov DA, Ugraitskaya SV, Mezhevikina LM, Zagainova AV, Makarov VV, Yudin SM, Fesenko (Jr.) EE. The Efficiency of the Preservation of Human Gut Microbiota in Liquid Nitrogen Depending on the Composition of the Cryoprotective Medium. Biophysics (Nagoya-shi) 2020. [DOI: 10.1134/s000635092005022x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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42
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Mousazadehkasin M, Tsavalas JG. Insights into Design of Biomimetic Glycerol-Grafted Polyol-Based Polymers for Ice Nucleation/Recrystallization Inhibition and Thermal Hysteresis Activity. Biomacromolecules 2020; 21:4626-4637. [DOI: 10.1021/acs.biomac.0c00907] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Mohammad Mousazadehkasin
- Department of Chemistry, University of New Hampshire, Durham, New Hampshire 03824, United States
| | - John G. Tsavalas
- Department of Chemistry, University of New Hampshire, Durham, New Hampshire 03824, United States
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43
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Liu W, Huang Z, He X, Jiang P, Huo X, Lu Z, Liu B. Impacts of trehalose and l-proline on the thermodynamic nonequilibrium phase change and thermal properties of normal saline. Cryobiology 2020; 96:92-98. [PMID: 32745484 DOI: 10.1016/j.cryobiol.2020.07.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/27/2020] [Accepted: 07/27/2020] [Indexed: 11/29/2022]
Abstract
Understanding the phase change behavior and thermal properties of cryoprotective agents (CPAs) in biological solutions is essential for enhancing the success of cryopreservation and biobanking. In this study, the phase change behavior and thermal properties of normal saline added with trehalose or l-proline were investigated using differential scanning calorimeter (DSC) and cryomicroscope during freezing and warming. The addition of trehalose or l-proline can eliminate the eutectic formation in normal saline. Trehalose had significantly lower latent heat release than l-proline does at a high concentration of 1 M (P < 0.05), while unfrozen water content of trehalose is significantly lower than that of l-proline at all the concentrations (P < 0.05). It was also found that addition of 0.2 M, 0.3 M and 1 M trehalose can achieve partial vitrification in normal saline and that the glass transition temperature rises along with the increase in concentrations of trehalose. However, no vitrification was observed in normal saline with l-proline at any concentrations. Besides, rates of ice crystal growth in normal saline added with trehalose are slower than those in normal saline with l-proline at the same concentrations. These results suggest that both trehalose and l-proline can act as CPAs by avoiding eutectic formation and inhibiting ice formation in normal saline for cell cryopreservation. It could be useful for CPA selection and designing in the future.
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Affiliation(s)
- Wei Liu
- Institute of Biothermal and Technology, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Zhiyong Huang
- Institute of Biothermal and Technology, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Xiaowen He
- Origincell Technology Group Co, Shanghai, 201203, China.
| | - Pei Jiang
- Institute of Biothermal and Technology, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Xiaoyue Huo
- Institute of Biothermal and Technology, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Zekang Lu
- Institute of Biothermal and Technology, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Baolin Liu
- Institute of Biothermal and Technology, University of Shanghai for Science and Technology, Shanghai, 200093, China.
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44
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Burkey AA, Hillsley A, Harris DT, Baltzegar JR, Zhang DY, Sprague WW, Rosales AM, Lynd NA. Mechanism of Polymer-Mediated Cryopreservation Using Poly(methyl glycidyl sulfoxide). Biomacromolecules 2020; 21:3047-3055. [DOI: 10.1021/acs.biomac.0c00392] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Aaron A. Burkey
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas, United States
| | - Alexander Hillsley
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas, United States
| | - Dale T. Harris
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas, United States
| | - Jacob R. Baltzegar
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas, United States
| | - Diana Y. Zhang
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas, United States
| | - William W. Sprague
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas, United States
| | - Adrianne M. Rosales
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas, United States
| | - Nathaniel A. Lynd
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas, United States
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45
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Georgiou PG, Kontopoulou I, Congdon TR, Gibson MI. Ice recrystallisation inhibiting polymer nano-objects via saline-tolerant polymerisation-induced self-assembly. MATERIALS HORIZONS 2020; 8:1883-1887. [PMID: 33692903 PMCID: PMC7116880 DOI: 10.1039/d0mh00354a] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Chemical tools to modulate ice formation/growth have great (bio)-technological value, with ice binding/antifreeze proteins being exciting targets for biomimetic materials. Here we introduce polymer nanomaterials that are potent inhibitors of ice recrystallisation using polymerisation-induced self-assembly (PISA), employing a poly(vinyl alcohol) graft macromolecular chain transfer agent (macro-CTA). Crucially, engineering the core-forming block with diacetone acrylamide enabled PISA to be conducted in saline, whereas poly(2-hydroxypropyl methacrylate) cores led to coagulation. The most active particles inhibited ice growth as low as 0.5 mg mL-1, and were more active than the PVA stabiliser block alone, showing that the dense packing of this nanoparticle format enhanced activity. This provides a unique route towards colloids capable of modulating ice growth.
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Affiliation(s)
| | | | | | - Matthew I. Gibson
- Department of Chemistry, University of Warwick, CV4 7AL, UK
- Warwick Medical School, University of Warwick, CV4 7AL, UK
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46
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Demonstration of the cryoprotective properties of the fucose-containing polysaccharide FucoPol. Carbohydr Polym 2020; 245:116500. [PMID: 32718611 DOI: 10.1016/j.carbpol.2020.116500] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 05/19/2020] [Accepted: 05/20/2020] [Indexed: 11/21/2022]
Abstract
We report the cryoprotective potential of FucoPol, a fucose-containing bacterial exopolysaccharide produced by Enterobacter A47. In vitro cryopreservation assays of Vero, Saos-2, HFFF2 and C2C12 cell lines exposed to a validated non-cytotoxic 2.5 mg/mL FucoPol concentration demonstrated a consistent post-thaw metabolic viability increase. Calorimetric analysis showed a non-colligative, FucoPol concentration-dependent increase of the freezing point (Tf), with minimal change in melting point (Tm). Freezing point variation was corroborated by Polarized Optical Microscopy studies, also showing a reduction of ice crystal dimensions. Its proven shear-thinning behaviour and polyanionicity favour interactivity between the polysaccharide and the water-ice interface, resulting in ice growth inhibition. These findings demonstrate FucoPol's high promise as a bio-based, biodegradable approach to be implemented into cryopreservation formulations.
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47
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Wang Z, Yang B, Chen Z, Liu D, Jing L, Gao C, Li J, He Z, Wang J. Bioinspired Cryoprotectants of Glucose-Based Carbon Dots. ACS APPLIED BIO MATERIALS 2020; 3:3785-3791. [DOI: 10.1021/acsabm.0c00376] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Zhanhui Wang
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Bin Yang
- The Sixth Affiliated Hospital; Department of Biomedical Engineering, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou 511436, China
| | - Zhuo Chen
- School of Materials Science & Engineering, Department of Materials Physics & Chemistry, Beijing Institute of Technology, Beijing 100081, China
| | - Dan Liu
- School of Materials Science & Engineering, Department of Materials Physics & Chemistry, Beijing Institute of Technology, Beijing 100081, China
| | - Lihong Jing
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Chong Gao
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Jian Li
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Zhiyuan He
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Jianjun Wang
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100190, China
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48
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Xiang H, Yang X, Ke L, Hu Y. The properties, biotechnologies, and applications of antifreeze proteins. Int J Biol Macromol 2020; 153:661-675. [PMID: 32156540 DOI: 10.1016/j.ijbiomac.2020.03.040] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 03/04/2020] [Accepted: 03/06/2020] [Indexed: 01/30/2023]
Abstract
By natural selection, organisms evolve different solutions to cope with extremely cold weather. The emergence of an antifreeze protein gene is one of the most momentous solutions. Antifreeze proteins possess an importantly functional ability for organisms to survive in cold environments and are widely found in various cold-tolerant species. In this review, we summarize the origin of antifreeze proteins, describe the diversity of their species-specific properties and functions, and highlight the related biotechnology on the basis of both laboratory tests and bioinformatics analysis. The most recent advances in the applications of antifreeze proteins are also discussed. We expect that this systematic review will contribute to the comprehensive knowledge of antifreeze proteins to readers.
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Affiliation(s)
- Hong Xiang
- Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, People's Republic of China.; CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institutes of Advanced Technology
| | - Xiaohu Yang
- Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, People's Republic of China.; CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institutes of Advanced Technology
| | - Lei Ke
- Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, People's Republic of China.; CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institutes of Advanced Technology
| | - Yong Hu
- Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, People's Republic of China.; CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institutes of Advanced Technology.
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49
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Naullage PM, Molinero V. Slow Propagation of Ice Binding Limits the Ice-Recrystallization Inhibition Efficiency of PVA and Other Flexible Polymers. J Am Chem Soc 2020; 142:4356-4366. [DOI: 10.1021/jacs.9b12943] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pavithra M. Naullage
- Department of Chemistry, The University of Utah, Salt Lake City, Utah 84112-0850, United States
| | - Valeria Molinero
- Department of Chemistry, The University of Utah, Salt Lake City, Utah 84112-0850, United States
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50
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Stubbs C, Bailey TL, Murray K, Gibson MI. Polyampholytes as Emerging Macromolecular Cryoprotectants. Biomacromolecules 2020; 21:7-17. [PMID: 31418266 PMCID: PMC6960013 DOI: 10.1021/acs.biomac.9b01053] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 08/15/2019] [Indexed: 11/29/2022]
Abstract
Cellular cryopreservation is a platform technology which underpins cell biology, biochemistry, biomaterials, diagnostics, and the cold chain for emerging cell-based therapies. This technique relies on effective methods for banking and shipping to avoid the need for continuous cell culture. The most common method to achieve cryopreservation is to use large volumes of organic solvent cryoprotective agents which can promote either a vitreous (ice free) phase or dehydrate and protect the cells. These methods are very successful but are not perfect: not all cell types can be cryopreserved and recovered, and the cells do not always retain their phenotype and function post-thaw. This Perspective will introduce polyampholytes as emerging macromolecular cryoprotective agents and demonstrate they have the potential to impact a range of fields from cell-based therapies to basic cell biology and may be able to improve, or replace, current solvent-based cryoprotective agents. Polyampholytes have been shown to be remarkable (mammalian cell) cryopreservation enhancers, but their mechanism of action is unclear, which may include membrane protection, solvent replacement, or a yet unknown protective mechanism, but it seems the modulation of ice growth (recrystallization) may only play a minor role in their function, unlike other macromolecular cryoprotectants. This Perspective will discuss their synthesis and summarize the state-of-the-art, including hypotheses of how they function, to introduce this exciting area of biomacromolecular science.
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Affiliation(s)
- Christopher Stubbs
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Trisha L. Bailey
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Kathryn Murray
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Matthew I. Gibson
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
- Warwick
Medical School, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
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