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Gokaltun A, Asik E, Byrne D, Yarmush ML, Usta OB. Supercooled preservation of cultured primary rat hepatocyte monolayers. Front Bioeng Biotechnol 2024; 12:1429412. [PMID: 39076209 PMCID: PMC11284110 DOI: 10.3389/fbioe.2024.1429412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2024] [Accepted: 06/27/2024] [Indexed: 07/31/2024] Open
Abstract
Supercooled preservation (SCP) is a technology that involves cooling a substance below its freezing point without initiating ice crystal formation. It is a promising alternative to prolong the preservation time of cells, tissues, engineered tissue products, and organs compared to the current practices of hypothermic storage. Two-dimensional (2D) engineered tissues are extensively used in in vitro research for drug screening and development and investigation of disease progression. Despite their widespread application, there is a lack of research on the SCP of 2D-engineered tissues. In this study, we presented the effects of SCP at -2 and -6°C on primary rat hepatocyte (PRH) monolayers for the first time and compared cell viability and functionality with cold storage (CS, + 4°C). We preserved PRH monolayers in two different commercially available solutions: Hypothermosol-FRS (HTS-FRS) and the University of Wisconsin (UW) with and without supplements (i.e., polyethylene glycol (PEG) and 3-O-Methyl-Α-D-Glucopyranose (3-OMG)). Our findings revealed that UW with and without supplements were inadequate for the short-term preservation of PRH monolayers for both SCP and CS with high viability, functionality, and monolayer integrity. The combination of supplements (PEG and 3-OMG) in the HTS-FRS solution outperformed the other groups and yielded the highest viability and functional capacity. Notably, PRH monolayers exhibited superior viability and functionality when stored at -2°C through SCP for up to 3 days compared to CS. Overall, our results demonstrated that SCP is a feasible approach to improving the short-term preservation of PRH monolayers and enables readily available 2D-engineered tissues to advance in vitro research. Furthermore, our findings provide insights into preservation outcomes across various biological levels, from cells to tissues and organs, contributing to the advancement of bioengineering and biotechnology.
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Affiliation(s)
- Aslihan Gokaltun
- 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 Chemical and Biological Engineering, Tufts University, Medford, MA, United States
- Department of Chemical Engineering, Hacettepe University, Ankara, Türkiye
| | - Eda Asik
- Shriners Hospitals for Children, Boston, MA, United States
- Department of Bioengineering, Hacettepe University, Ankara, Türkiye
| | - Delaney Byrne
- 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
| | - Martin L. Yarmush
- 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 Biomedical Engineering, Rutgers University, Newark, NJ, United States
| | - O. Berk Usta
- 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
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Bejaoui M, Slim C, Peralta C, Ben Abdennebi H. Effect of PERLA®, a new cold-storage solution, on oxidative stress injury and early graft function in rat kidney transplantation model. BMC Nephrol 2024; 25:62. [PMID: 38389057 PMCID: PMC10882783 DOI: 10.1186/s12882-024-03488-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 01/30/2024] [Indexed: 02/24/2024] Open
Abstract
BACKGROUND The composition of organ preservation solutions is crucial for maintaining graft integrity and early graft function after transplantation. The aim of this study is to compare new organ preservation solution PERLA® with the gold standard preservation solution University of Wisconsin (UW) regarding oxidative stress and early graft injury. METHODS In order to assess oxidative stress after cold storage, kidney grafts have been preserved for 18 h at 4° C in either UW solution or PERLA® solution and then assessed for oxidative stress injury (protocol 1). To assess kidney injuries and oxidative stress after reperfusion, rat kidneys were harvested, stored in cold UW or in PERLA® solutions for 18 h at 4 °C and then transplanted heterotopically for 6 h (protocol 2). PERLA® is a high Na+/low K+ solution including PEG-35 (1 g/L), trimetazidine (1 µM), carvedilol (10 µM) and tacrolimus (5 µM). RESULTS Our results showed that preservation of kidneys in PERLA® solution significantly attenuates oxidative stress parameters after cold storage and reperfusion. We found a significant decrease in oxidative damage indicators (MDA, CD and CP) and a significant increase in antioxidant indicators (GPx, GSH, CAT, SOD and PSH). Moreover, PERLA® solution decreased kidney injury after reperfusion (creatinine, LDH and uric acid). CONCLUSION PERLA® solution was more effective than UW storage solution in preserving rat's kidney grafts.
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Affiliation(s)
- Mohamed Bejaoui
- Laboratory of Human Genome and Multifactorial Diseases (LR12ES07), Faculty of Pharmacy, University of Monastir, Monastir, Tunisia
| | - Chérifa Slim
- Laboratory of Human Genome and Multifactorial Diseases (LR12ES07), Faculty of Pharmacy, University of Monastir, Monastir, Tunisia
| | - Carmen Peralta
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036, Barcelona, Spain
| | - Hassen Ben Abdennebi
- Laboratory of Human Genome and Multifactorial Diseases (LR12ES07), Faculty of Pharmacy, University of Monastir, Monastir, Tunisia.
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Combined Therapy with Simvastatin- and Coenzyme-Q10-Loaded Nanoparticles Upregulates the Akt-eNOS Pathway in Experimental Metabolic Syndrome. Int J Mol Sci 2022; 24:ijms24010276. [PMID: 36613727 PMCID: PMC9820291 DOI: 10.3390/ijms24010276] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/17/2022] [Accepted: 12/20/2022] [Indexed: 12/28/2022] Open
Abstract
In addition to their LDL-cholesterol-lowering effect, statins have pleiotropic beneficial effects on the cardiovascular system. However, long-term treatment with statins may be associated with serious side effects. With the aim to make statin therapy more effective, we studied the effects of simvastatin- and coenzyme-Q10-loaded polymeric nanoparticles on the lipid profile and nitric oxide (NO)/reactive oxygen species (ROS) balance in the heart and aorta of adult male obese Zucker rats. The rats were divided into an untreated group, a group treated with empty nanoparticles, and groups treated with simvastatin-, coenzyme Q10 (CoQ10)-, or a combination of simvastatin- and CoQ10-loaded nanoparticles (SIMV+CoQ10). After 6 weeks, the lipid profile in the plasma and the concentration of conjugated dienes in the liver were determined. Nitric oxide synthase (NOS) activity, Akt, endothelial NOS (eNOS), phosphorylated eNOS (p-eNOS), nicotinamide adenine dinucleotide phosphate (NADPH) oxidase, and nuclear factor kappaB (NF-kappaB) protein expressions were measured in the heart and aorta. All simvastatin, CoQ10, and SIMV+CoQ10 treatments decreased plasma LDL levels, but only the combined SIMV+CoQ10 treatment increased NOS activity and the expression of Akt, eNOS, and p-eNOS in both the heart and the aorta. Interestingly, NADPH oxidase in the heart and NF-kappaB protein expression in the aorta were decreased by all treatments, including nanoparticles alone. In conclusion, only combined therapy with SIMV- and CoQ10-loaded nanoparticles increased NOS activity and upregulated the Akt-eNOS pathway in obese Zucker rats, which may represent a promising tool for the treatment of cardiometabolic diseases.
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A Potential Route to Reduce Ischemia/Reperfusion Injury in Organ Preservation. Cells 2022; 11:cells11172763. [PMID: 36078175 PMCID: PMC9455584 DOI: 10.3390/cells11172763] [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: 06/13/2022] [Revised: 08/29/2022] [Accepted: 09/01/2022] [Indexed: 11/16/2022] Open
Abstract
The pathophysiological process of ischemia and reperfusion injury (IRI), an inevitable step in organ transplantation, causes important biochemical and structural changes that can result in serious organ damage. IRI is relevant for early graft dysfunction and graft survival. Today, in a global context of organ shortages, most organs come from extended criteria donors (ECDs), which are more sensitive to IRI. The main objective of organ preservation solutions is to protect against IRI through the application of specific, nonphysiological components, under conditions of no blood or oxygen, and then under conditions of metabolic reduction by hypothermia. The composition of hypothermic solutions includes osmotic and oncotic buffering components, and they are intracellular (rich in potassium) or extracellular (rich in sodium). However, above all, they all contain the same type of components intended to protect against IRI, such as glutathione, adenosine and allopurinol. These components have not changed for more than 30 years, even though our knowledge of IRI, and much of the relevant literature, questions their stability or efficacy. In addition, several pharmacological molecules have been the subjects of preclinical studies to optimize this protection. Among them, trimetazidine, tacrolimus and carvedilol have shown the most benefits. In fact, these drugs are already in clinical use, and it is a question of repositioning them for this novel use, without additional risk. This new strategy of including them would allow us to shift from cold storage solutions to cold preservation solutions including multitarget pharmacological components, offering protection against IRI and thus protecting today's more vulnerable organs.
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Bardallo RG, Company-Marin I, Folch-Puy E, Roselló-Catafau J, Panisello-Rosello A, Carbonell T. PEG35 and Glutathione Improve Mitochondrial Function and Reduce Oxidative Stress in Cold Fatty Liver Graft Preservation. Antioxidants (Basel) 2022; 11:antiox11010158. [PMID: 35052662 PMCID: PMC8772919 DOI: 10.3390/antiox11010158] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/11/2022] [Accepted: 01/13/2022] [Indexed: 02/05/2023] Open
Abstract
The need to meet the demand for transplants entails the use of steatotic livers, more vulnerable to ischemia-reperfusion (IR) injury. Therefore, finding the optimal composition of static cold storage (SCS) preservation solutions is crucial. Given that ROS regulation is a therapeutic strategy for liver IR injury, we have added increasing concentrations of PEG35 and glutathione (GSH) to the preservation solutions (IGL-1 and IGL-2) and evaluated the possible protection against energy depletion and oxidative stress. Fatty livers from obese Zücker rats were isolated and randomly distributed in the control (Sham) preserved (24 h at 4 °C) in IGL-0 (without PEG35 and 3 mmol/L GSH), IGL-1 (1 g/L PEG35, and 3 mmol/L GSH), and IGL-2 (5 g/L PEG35 and 9 mmol/L GSH). Energy metabolites (ATP and succinate) and the expression of mitochondrial oxidative phosphorylation complexes (OXPHOS) were determined. Mitochondrial carrier uncoupling protein 2 (UCP2), PTEN-induced kinase 1 (PINK1), nuclear factor-erythroid 2 related factor 2 (Nrf2), heme oxygenase-1 (HO-1), and the inflammasome (NLRP3) expressions were analyzed. As biomarkers of oxidative stress, protein oxidation (AOPP) and carbonylation (DNP derivatives), and lipid peroxidation (malondialdehyde (MDA)–thiobarbituric acid (TBA) adducts) were measured. In addition, the reduced and oxidized glutathione (GSH and GSSG) and enzymatic (Cu–Zn superoxide dismutase (SOD), CAT, GSH S-T, GSH-Px, and GSH-R) antioxidant capacities were determined. Our results showed that the cold preservation of fatty liver graft depleted ATP, accumulated succinate and increased oxidative stress. In contrast, the preservation with IGL-2 solution maintained ATP production, decreased succinate levels and increased OXPHOS complexes I and II, UCP2, and PINK-1 expression, therefore maintaining mitochondrial integrity. IGL-2 also protected against oxidative stress by increasing Nrf2 and HO-1 expression and GSH levels. Therefore, the presence of PEG35 in storage solutions may be a valuable option as an antioxidant agent for organ preservation in clinical transplantation.
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Affiliation(s)
- Raquel G. Bardallo
- Department of Cell Biology, Physiology and Immunology, Faculty of Biology, Universitat de Barcelona, 08028 Barcelona, Spain; (R.G.B.); (I.C.-M.)
| | - Idoia Company-Marin
- Department of Cell Biology, Physiology and Immunology, Faculty of Biology, Universitat de Barcelona, 08028 Barcelona, Spain; (R.G.B.); (I.C.-M.)
| | - Emma Folch-Puy
- Experimental Pathology Department, Institut d’Investigacions Biomèdiques de Barcelona—Consejo Superior de Investigaciones Científicas (IIBB-CSIC), 08036 Barcelona, Spain; (E.F.-P.); (J.R.-C.); (A.P.-R.)
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain
| | - Joan Roselló-Catafau
- Experimental Pathology Department, Institut d’Investigacions Biomèdiques de Barcelona—Consejo Superior de Investigaciones Científicas (IIBB-CSIC), 08036 Barcelona, Spain; (E.F.-P.); (J.R.-C.); (A.P.-R.)
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain
| | - Arnau Panisello-Rosello
- Experimental Pathology Department, Institut d’Investigacions Biomèdiques de Barcelona—Consejo Superior de Investigaciones Científicas (IIBB-CSIC), 08036 Barcelona, Spain; (E.F.-P.); (J.R.-C.); (A.P.-R.)
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain
| | - Teresa Carbonell
- Department of Cell Biology, Physiology and Immunology, Faculty of Biology, Universitat de Barcelona, 08028 Barcelona, Spain; (R.G.B.); (I.C.-M.)
- Correspondence:
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Polyethylene Glycol 35 (PEG35) Modulates Exosomal Uptake and Function. Polymers (Basel) 2020; 12:polym12123044. [PMID: 33353210 PMCID: PMC7766665 DOI: 10.3390/polym12123044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 11/23/2020] [Accepted: 12/16/2020] [Indexed: 01/08/2023] Open
Abstract
Polyethylene glycols (PEGs) are neutral polymers widely used in biomedical applications due to its hydrophilicity and biocompatibility. Exosomes are small vesicles secreted by nearly all cell types and play an important role in normal and pathological conditions. The purpose of this study was to evaluate the role of a 35-kDa molecular weight PEG (PEG35) on the modulation of exosome-mediated inflammation. Human macrophage-like cells THP-1, epithelial BICR-18, and CAPAN-2 cells were exposed to PEG35 prior to incubation with exosomes of different cellular origins. Exosome internalization was evaluated by confocal microscopy and flow cytometry. In another set of experiments, macrophages were treated with increasing concentrations of PEG35 prior to exposure with the appropriate stimuli: lipopolysaccharide, BICR-18-derived exosomes, or exosomes from acute pancreatitis-induced rats. Nuclear Factor Kappa B (NFκB) and Signal transducer and activator of transcription 3 (STAT3) activation and the expression levels of pro-inflammatory Interleukin 1β (IL1β) were determined. PEG35 administration significantly enhanced the internalization of exosomes in both macrophages and epithelial cells. Further, PEG35 ameliorated the inflammatory response induced by acute pancreatitis-derived exosomes by reducing the expression of IL1β and p65 nuclear translocation. Our results revealed that PEG35 promotes the cellular uptake of exosomes and modulates the pro-inflammatory effect of acute pancreatitis-derived vesicles through inhibition of NFκB, thus emphasizing the potential value of PEG35 as an anti-inflammatory agent for biomedical purposes.
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Legeai C, Durand L, Savoye E, Macher MA, Bastien O. Effect of preservation solutions for static cold storage on kidney transplantation outcomes: A National Registry Study. Am J Transplant 2020; 20:3426-3442. [PMID: 32400921 DOI: 10.1111/ajt.15995] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 03/25/2020] [Accepted: 04/22/2020] [Indexed: 01/25/2023]
Abstract
This study aimed to evaluate how 5 preservation solutions for static cold storage affected kidney transplant outcomes. It included all first single kidney transplants during 2010-2014 from donations after brain death in the French national transplant registry, excluding preemptive transplants and transplants of kidneys preserved with a hypothermic perfusion machine. The effects of each preservation solution on delayed graft function (DGF) and 1-year transplant failure were evaluated with hierarchical multivariable logistic regression models. The study finally included 7640 transplanted kidneys: 3473 (45.5%) preserved with Institut Georges Lopez-1 solution (IGL-1), 773 (10.1%) with University of Wisconsin solution, 731 (9.6%) with Solution de Conservation des Organes et Tissus (SCOT, organ and tissue preservation solution), 2215 (29.0%) with Celsior, and 448 (5.9%) with histidine-tryptophan-ketoglutarate. Primary nonfunction rates did not differ by solution. After adjustment for donor, recipient, and transplant characteristics, the DGF risk was significantly lower with IGL-1 than with all other solutions (odds ratio [OR] 0.55, 95% confidence interval [CI] 0.48-0.64). Conversely, SCOT was associated with a DGF risk significantly higher than the other solutions (OR 2.69, 95% CI 2.21-3.27) and triple that of IGL-1 (OR 3.37, 95% CI 2.72-4.16). One year after transplantation, the transplant failure rate did not differ significantly by preservation solution. The difference between the groups for 1-year mean creatinine clearance was not clinically relevant.
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Affiliation(s)
- Camille Legeai
- Organ and Tissue Procurement and Transplantation Department, Agence de la Biomédecine, Saint Denis La Plaine, France
| | - Louise Durand
- Organ and Tissue Procurement and Transplantation Department, Agence de la Biomédecine, Saint Denis La Plaine, France
| | - Emilie Savoye
- Organ and Tissue Procurement and Transplantation Department, Agence de la Biomédecine, Saint Denis La Plaine, France
| | - Marie-Alice Macher
- Organ and Tissue Procurement and Transplantation Department, Agence de la Biomédecine, Saint Denis La Plaine, France
| | - Olivier Bastien
- Organ and Tissue Procurement and Transplantation Department, Agence de la Biomédecine, Saint Denis La Plaine, France
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Ferrero-Andrés A, Panisello-Roselló A, Serafín A, Roselló-Catafau J, Folch-Puy E. Polyethylene Glycol 35 (PEG35) Protects against Inflammation in Experimental Acute Necrotizing Pancreatitis and Associated Lung Injury. Int J Mol Sci 2020; 21:ijms21030917. [PMID: 32019239 PMCID: PMC7036920 DOI: 10.3390/ijms21030917] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Accepted: 01/29/2020] [Indexed: 12/12/2022] Open
Abstract
Acute pancreatitis is an inflammatory disorder of the pancreas. Its presentation ranges from self-limiting disease to acute necrotizing pancreatitis (ANP) with multiorgan failure and a high mortality. Polyethylene glycols (PEGs) are non-immunogenic, non-toxic, and water-soluble chemicals composed of repeating units of ethylene glycol. The present article explores the effect of PEG35 administration on reducing the severity of ANP and associated lung injury. ANP was induced by injection of 5% sodium taurocholate into the biliopancreatic duct. PEG35 was administered intravenously either prophylactically or therapeutically. Three hours after ANP induction, pancreas and lung tissue samples and blood were collected and ANP severity was assessed. To evaluate the inflammatory response, gene expression of pro-inflammatory cytokines and chemokine and the changes in the presence of myeloperoxidase and adhesion molecule levels were determined in both the pancreas and the lung. To evaluate cell death, lactate dehydrogenase (LDH) activity and apoptotic cleaved caspase-3 localization were determined in plasma and in both the pancreatic and lung tissue respectively. ANP-associated local and systemic inflammatory processes were reduced when PEG35 was administered prophylactically. PEG35 pre-treatment also protected against acute pancreatitis-associated cell death. Notably, the therapeutic administration of PEG35 significantly decreased associated lung injury, even when the pancreatic lesion was equivalent to that in the untreated ANP-induced group. Our results support a protective role of PEG35 against the ANP-associated inflammatory process and identify PEG35 as a promising tool for the treatment of the potentially lethal complications of the disease.
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Affiliation(s)
- Ana Ferrero-Andrés
- Experimental Pathology Department, Institut d’Investigacions Biomèdiques de Barcelona-Consejo Superior de Investigaciones Científicas (IIBB-CSIC), Barcelona, 08036 Catalonia, Spain; (A.F.-A.); (A.P.-R.)
| | - Arnau Panisello-Roselló
- Experimental Pathology Department, Institut d’Investigacions Biomèdiques de Barcelona-Consejo Superior de Investigaciones Científicas (IIBB-CSIC), Barcelona, 08036 Catalonia, Spain; (A.F.-A.); (A.P.-R.)
| | - Anna Serafín
- PCB Animal Facility-Parc Científic de Barcelona, Barcelona, 08028 Catalonia, Spain;
| | - Joan Roselló-Catafau
- Experimental Pathology Department, Institut d’Investigacions Biomèdiques de Barcelona-Consejo Superior de Investigaciones Científicas (IIBB-CSIC), Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, 08036 Catalonia, Spain;
| | - Emma Folch-Puy
- Experimental Pathology Department, Institut d’Investigacions Biomèdiques de Barcelona-Consejo Superior de Investigaciones Científicas (IIBB-CSIC), Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, 08036 Catalonia, Spain;
- Correspondence: ; Tel.: +34-933-638-300 (ext. 357); Fax: +34-933-638-301
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Tian Y, Zhu H, Wu J, Wang S. Effect of improved preservation solution with methoxy polyethylene glycol succinimidyl propionate on rat cornea. Cell Tissue Bank 2018; 19:667-679. [PMID: 30069708 DOI: 10.1007/s10561-018-9719-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Accepted: 07/28/2018] [Indexed: 11/30/2022]
Abstract
To observe the effect of DMEM/F12 pegylated with methoxy polyethylene glycol succinimidyl propionate (mPEG-SPA) on the biophysical and immune characteristics of the rat cornea preserved in it. Corneal grafts were harvested from Wistar rat and preserved in the DMEM/F12 plus mPEG-SPA, DMEM/F12 without mPEG-SPA, and standard Optisol-GS solution at 4 °C for 14 days, referred as plus-PEG, minus-PEG, and Optisol grafts, respectively. The biophysical properties of those grafts, including transmittance, thickness, water content, and biomechanics were investigated. The survival of those grafts was observed in the high-risk corneal transplantation model. Transmittance and biomechanics did not show any differences among those grafts. Thickness and water content of plus-PEG grafts were slightly improved. Proliferation and activation of lymphocytes were lower while they were incubated with plus-PEG grafts, compared with minus-PEG grafts and Optisol grafts. The mean survival time was significantly prolonged in plus-PEG grafts. DMEM/F12 solution plus mPEG-SPA improved the survival of corneal grafts and maintained the comparative biophysical characteristics of them, compared with the standard preservation solution.
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Affiliation(s)
- Ying Tian
- The Third Affiliated Hospital, Guangzhou Medical University, Guangzhou, 510150, People's Republic of China
| | - Haifeng Zhu
- The First Hospital of Xi'an, Xi'an, 710000, People's Republic of China.,Shaanxi Provincial Institute of Ophthalmology, Xi'an, 710000, People's Republic of China.,Shaanxi Provincial Key Laboratory of Ophthalmology, Xi'an, 710000, People's Republic of China.,Clinical Research Center for Ophthalmologic Diseases of Shaanxi, Xi'an, 710000, People's Republic of China
| | - Jie Wu
- The First Hospital of Xi'an, Xi'an, 710000, People's Republic of China.,Shaanxi Provincial Institute of Ophthalmology, Xi'an, 710000, People's Republic of China.,Shaanxi Provincial Key Laboratory of Ophthalmology, Xi'an, 710000, People's Republic of China.,Clinical Research Center for Ophthalmologic Diseases of Shaanxi, Xi'an, 710000, People's Republic of China
| | - Shuangyong Wang
- The Third Affiliated Hospital, Guangzhou Medical University, Guangzhou, 510150, People's Republic of China.
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Casselbrant A, Söfteland JM, Hellström M, Malinauskas M, Oltean M. Luminal Polyethylene Glycol Alleviates Intestinal Preservation Injury Irrespective of Molecular Size. J Pharmacol Exp Ther 2018; 366:29-36. [DOI: 10.1124/jpet.117.247023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
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The Optimal PEG for Kidney Preservation: A Preclinical Porcine Study. Int J Mol Sci 2018; 19:ijms19020454. [PMID: 29401654 PMCID: PMC5855676 DOI: 10.3390/ijms19020454] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 12/26/2017] [Accepted: 01/29/2018] [Indexed: 01/12/2023] Open
Abstract
University of Wisconsin (UW) solution is not optimal for preservation of marginal organs. Polyethylene glycol (PEG) could improve protection. Similarly formulated solutions containing either 15 or 20 g/L PEG 20 kDa or 5, 15 and 30 g/L PEG 35 kDa were tested in vitro on kidney endothelial cells, ex vivo on preserved kidneys, and in vivo in a pig kidney autograft model. In vitro, all PEGs provided superior preservation than UW in terms of cell survival, adenosine triphosphate (ATP) production, and activation of survival pathways. Ex vivo, tissue injury was lower with PEG 20 kDa compared to UW or PEG 35 kDa. In vivo, function recovery was identical between UW and PEG 35 kDa groups, while PEG 20 kDa displayed swifter recovery. At three months, PEG 35 kDa 15 and 30 g/L animals had worse outcomes than UW, while 5 g/L PEG 35 kDa was similar. PEG 20 kDa was superior to both UW and PEG 35 kDa in terms of function and fibrosis development, with low activation of damage pathways. PEG 20 kDa at 15 g/L was superior to 20 g/L. While in vitro models did not discriminate between PEGs, in large animal models of transplantation we showed that PEG 20 kDa offers a higher level of protection than UW and that longer chains such as PEG 35 kDa must be used at low doses, such as found in Institut George Lopez (IGL1, 1g/L).
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Renal cold storage followed by transplantation impairs expression of key mitochondrial fission and fusion proteins. PLoS One 2017; 12:e0185542. [PMID: 28977005 PMCID: PMC5627902 DOI: 10.1371/journal.pone.0185542] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 09/14/2017] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND The majority of transplanted kidneys are procured from deceased donors which all require exposure to cold storage (CS) for successful transplantation. Unfortunately, this CS leads to renal and mitochondrial damage but, specific mitochondrial targets affected by CS remain largely unknown. The goal of this study is to determine whether pathways involved with mitochondrial fusion or fission, are disrupted during renal CS. METHODS Male Lewis rat kidneys were exposed to cold storage (CS) alone or cold storage combined with transplantation (CS/Tx). To compare effects induced by CS, kidney transplantation without CS exposure (autotransplantation; ATx) was also used. Mitochondrial function was assessed using high resolution respirometry. Expression of mitochondrial fusion and fission proteins were monitored using Western blot analysis. RESULTS CS alone (no Tx) reduced respiratory complex I and II activities along with reduced expression of the primary mitochondrial fission protein, dynamin related protein (DRP1), induced loss of the long form of Optic Atrophy Protein (OPA1), and altered the mitochondrial protease, OMA1, which regulates OPA1 processing. CS followed by Tx (CS/Tx) reduced complex I, II, and III activities, and induced a profound loss of the long and short forms of OPA1, mitofusin 1 (MFN1), and mitofusin 2 (MFN2) which all control mitochondrial fusion. In addition, expression of DRP1, along with its primary receptor protein, mitochondrial fission factor (MFF), were also reduced after CS/Tx. Interestingly, CS/Tx lead to aberrant higher molecular weight OMA1 aggregate expression. CONCLUSIONS Our results suggest that CS appears to involve activation of the OMA1, which could be a key player in proteolysis of the fusion and fission protein machinery following transplantation. These findings raise the possibility that impaired mitochondrial fission and fusion may be unrecognized contributors to CS induced mitochondrial injury and compromised renal graft function after transplantation.
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Lu J, Zhang Y, Zhu D, Wang J, Ye C, Zhang X, Cao H, Li L. Improvement of short-term hypothermic preservation of microencapsulated hepatocytes. Biotechnol Lett 2016; 38:909-17. [PMID: 26943346 DOI: 10.1007/s10529-016-2063-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 02/08/2016] [Indexed: 02/03/2023]
Abstract
OBJECTIVES To determine the optimal storage solution containing suitable protective agents for the preservation of microencapsulated hepatocytes at 4 °C as well as the optimum incubation time after hypothermic preservation. RESULTS L15 was the optimum solution for both maintaining microcapsule integrity and cell viability. Furthermore, 5 %(v/v) PEG (20 or 35 kDa) added to Leibovitz-15 medium was optimal for microencapsulated C3A cells, enhancing cell viability and liver-specific functions, including albumin and urea synthesis as well as CYP1A2 and CYP3A4 activities. The transcription levels of several CYP450-related genes were also dramatically increased in cells incubated in the optimal solution. Pre-incubation for 2 h was the optimal time for restoring favorable levels of CYP1A2 and CYP3A4 activities in microencapsulated C3A cells for short term, 2 day storage. CONCLUSIONS Leibovitz-15 medium supplemented with 5 % (v/v) PEG is a promising cold solution for microencapsulated hepatocytes at 4 °C, with an incubation of 2 h at 37 °C after hypothermic preservation being the best incubation duration for further cell application.
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Affiliation(s)
- Juan Lu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Yanhong Zhang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Danhua Zhu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Jie Wang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Chao Ye
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Xiaoqian Zhang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Hongcui Cao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Lanjuan Li
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, College of Medicine, Zhejiang University, Hangzhou, 310003, China.
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Polyethylene Glycol Preconditioning: An Effective Strategy to Prevent Liver Ischemia Reperfusion Injury. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:9096549. [PMID: 26981166 PMCID: PMC4770158 DOI: 10.1155/2016/9096549] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 10/29/2015] [Accepted: 11/02/2015] [Indexed: 02/06/2023]
Abstract
Hepatic ischemia reperfusion injury (IRI) is an inevitable clinical problem for liver surgery. Polyethylene glycols (PEGs) are water soluble nontoxic polymers that have proven their effectiveness in various in vivo and in vitro models of tissue injury. The present study aims to investigate whether the intravenous administration of a high molecular weight PEG of 35 kDa (PEG 35) could be an effective strategy for rat liver preconditioning against IRI. PEG 35 was intravenously administered at 2 and 10 mg/kg to male Sprague Dawley rats. Then, rats were subjected to one hour of partial ischemia (70%) followed by two hours of reperfusion. The results demonstrated that PEG 35 injected intravenously at 10 mg/kg protected efficiently rat liver against the deleterious effects of IRI. This was evidenced by the significant decrease in transaminases levels and the better preservation of mitochondrial membrane polarization. Also, PEG 35 preserved hepatocyte morphology as reflected by an increased F-actin/G-actin ratio and confocal microscopy findings. In addition, PEG 35 protective mechanisms were correlated with the activation of the prosurvival kinase Akt and the cytoprotective factor AMPK and the inhibition of apoptosis. Thus, PEG may become a suitable agent to attempt pharmacological preconditioning against hepatic IRI.
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15
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Protective Effect of Intravenous High Molecular Weight Polyethylene Glycol on Fatty Liver Preservation. BIOMED RESEARCH INTERNATIONAL 2015; 2015:794287. [PMID: 26543868 PMCID: PMC4620277 DOI: 10.1155/2015/794287] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 08/08/2015] [Accepted: 08/12/2015] [Indexed: 12/17/2022]
Abstract
Ischemia reperfusion injury (IRI) leads to significant tissue damage in liver surgery. Polyethylene glycols (PEGs) are water soluble nontoxic polymers that have proved their effectiveness against IRI. The objective of our study was to investigate the potential protective effects of intravenous administration of a high molecular weight PEG of 35 kDa (PEG 35) in steatotic livers subjected to cold ischemia reperfusion. In this study, we used isolated perfused rat liver model to assess the effects of PEG 35 intravenous administration after prolonged cold ischemia (24 h, 4°C) and after reperfusion (2 h, 37°C). Liver injury was measured by transaminases levels and mitochondrial damage was determined by confocal microscopy assessing mitochondrial polarization (after cold storage) and by measuring glutamate dehydrogenase activity (after reperfusion). Also, cell signaling pathways involved in the physiopathology of IRI were assessed by western blot technique. Our results show that intravenous administration of PEG 35 at 10 mg/kg ameliorated liver injury and protected the mitochondria. Moreover, PEG 35 administration induced a significant phosphorylation of prosurvival protein kinase B (Akt) and activation of cytoprotective factors e-NOS and AMPK. In conclusion, intravenous PEG 35 efficiently protects steatotic livers exposed to cold IRI.
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16
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Polyethylene glycol protects primary hepatocytes during supercooling preservation. Cryobiology 2015; 71:125-9. [PMID: 25936340 DOI: 10.1016/j.cryobiol.2015.04.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 04/13/2015] [Accepted: 04/27/2015] [Indexed: 11/20/2022]
Abstract
Cold storage (at 4°C) offers a compromise between the benefits and disadvantages of cooling. It allows storage of organs or cells for later use that would otherwise quickly succumb to warm ischemia, but comprises cold ischemia that, when not controlled properly, can result in severe damage as well by both similar and unique mechanisms. We hypothesized that polyethylene glycol (PEG) 35 kDa would ameliorate these injury pathways and improve cold primary hepatocyte preservation. We show that reduction of the storage temperature to below zero by means of supercooling, or subzero non-freezing, together with PEG supplementation increases the viable storage time of primary rat hepatocytes in University of Wisconsin (UW) solution from 1 day to 4 days. We find that the addition of 5% PEG 35 kDa to the storage medium prevents cold-induced lipid peroxidation and maintains hepatocyte viability and functionality during storage. These results suggest that PEG supplementation in combination with supercooling may enable a more optimized cell and organ preservation.
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17
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Puts CF, Berendsen TA, Bruinsma BG, Ozer S, Luitje M, Usta OB, Yarmush ML, Uygun K. Polyethylene glycol protects primary hepatocytes during supercooling preservation. Cryobiology 2015. [PMID: 25936340 DOI: 10.1016/jcryobiol.2015.04.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Cold storage (at 4°C) offers a compromise between the benefits and disadvantages of cooling. It allows storage of organs or cells for later use that would otherwise quickly succumb to warm ischemia, but comprises cold ischemia that, when not controlled properly, can result in severe damage as well by both similar and unique mechanisms. We hypothesized that polyethylene glycol (PEG) 35 kDa would ameliorate these injury pathways and improve cold primary hepatocyte preservation. We show that reduction of the storage temperature to below zero by means of supercooling, or subzero non-freezing, together with PEG supplementation increases the viable storage time of primary rat hepatocytes in University of Wisconsin (UW) solution from 1 day to 4 days. We find that the addition of 5% PEG 35 kDa to the storage medium prevents cold-induced lipid peroxidation and maintains hepatocyte viability and functionality during storage. These results suggest that PEG supplementation in combination with supercooling may enable a more optimized cell and organ preservation.
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Affiliation(s)
- C F Puts
- Center for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital and Harvard Medical School, USA
| | - T A Berendsen
- Center for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital and Harvard Medical School, USA
| | - B G Bruinsma
- Center for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital and Harvard Medical School, USA
| | - Sinan Ozer
- Center for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital and Harvard Medical School, USA
| | - Martha Luitje
- Center for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital and Harvard Medical School, USA
| | - O Berk Usta
- Center for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital and Harvard Medical School, USA
| | - M L Yarmush
- Center for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital and Harvard Medical School, USA; Department of Biomedical Engineering, Rutgers University, Piscataway, NJ, USA.
| | - K Uygun
- Center for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital and Harvard Medical School, USA.
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18
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Jain S, Keys D, Nydam T, Plenter RJ, Edelstein CL, Jani A. Inhibition of autophagy increases apoptosis during re-warming after cold storage in renal tubular epithelial cells. Transpl Int 2014; 28:214-23. [PMID: 25270002 DOI: 10.1111/tri.12465] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Revised: 06/26/2014] [Accepted: 09/21/2014] [Indexed: 01/10/2023]
Abstract
Prolonged cold storage and re-warming (CS/REW) of kidneys are risk factors for delayed graft function (DGF). Studies in renal tubular epithelial cells (RTECs) have determined apoptosis and autophagy in models of either cold storage (CS) or re-warming alone. The effect of both cold storage and re-warming on apoptosis and autophagy, in RTECS is not known and is relevant to DGF as the kidney is subjected to both CS and re-warming. We hypothesized that CS/REW of RTECs would induce autophagy that protects against apoptosis. In CS/REW, there was increased autophagic flux of RTECs. Autophagy inhibition using an Atg5 siRNA resulted in increased cleaved caspase-3 and increased apoptotic cells (on both morphology and annexin V staining) during CS/REW. The effect of autophagy inhibition on necrosis in RTECs is unknown. There were increased necrosis and caspase-1, a mediator of necrosis, during CS/REW, and the Atg5 siRNA had no effect on necrosis and caspase-1. In a kidney transplant model, there was an increase in LC3 II, a marker of autophagy, in kidneys transplanted after cold storage. In summary, autophagic flux is increased during CS/REW. Autophagy inhibition resulted in increased cleaved caspase-3 and increased apoptosis during CS/REW without an effect on necrosis or caspase-1. In conclusion, autophagy inhibition in RTECs after CS/REW induces apoptotic cell death and may be deleterious as a therapy to decrease DGF.
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Giraud S, Codas R, Hauet T, Eugene M, Badet L. Polyethylene glycols and organ protection against I/R injury. Prog Urol 2014; 24 Suppl 1:S37-43. [DOI: 10.1016/s1166-7087(14)70062-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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20
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Evaluation of Institut Georges Lopez-1 Preservation Solution in Pig Pancreas Transplantation. Transplantation 2014; 97:901-7. [PMID: 24646772 DOI: 10.1097/tp.0000000000000050] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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21
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Katayama M, Tsuchiaka S, Motegi T, Miyazaki M, Yamashita T, Shimamura S, Okamura Y, Uzuka Y. High-molecular-weight polyethylene glycol enhances hypothermic storage of feline kidney cells. J Vet Med Sci 2014; 76:923-6. [PMID: 24599064 PMCID: PMC4108781 DOI: 10.1292/jvms.13-0565] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Phosphate-buffered sucrose
(PBSc) solution is effective for short-term hypothermic preservation of tissue during
feline kidney transplantation. A high-molecular-weight polyethylene glycol (35,000 Da,
PEG35) reportedly enhanced the protective effects against cold-induced tubular injuries in
animal kidney transplantation models. We investigated the ability of PBSc solution
containing PEG35 to preserve cultured feline kidney cells using in vitro
WST-8 cell proliferation assays. PEG35 significantly improved cell viability during 24 hr
of cold preservation. PBSc containing 20 g/l PEG35 achieved an effect
almost equal to that of University of Wisconsin (UW) solution, the gold standard
preservation solution used in human clinical kidney transplantation, for up to 24 hr of
preservation. Our results suggest that PBSc containing PEG35 provides an excellent medium
for graft cold storage during feline kidney transplantation.
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Affiliation(s)
- Masaaki Katayama
- Division of Small Animal Surgery, Co-Department of Veterinary Medicine, Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka, Iwate 020-8550, Japan
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22
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Pucci Molineris M, Di Venanzio G, Mamprin ME, Mediavilla MG. Evaluation of the protection exerted by Pisum sativum Ferredoxin-NADP(H) Reductase against injury induced by hypothermia on Cos-7 cells. Cryobiology 2013; 67:76-83. [PMID: 23727065 DOI: 10.1016/j.cryobiol.2013.05.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2012] [Revised: 04/15/2013] [Accepted: 05/20/2013] [Indexed: 02/07/2023]
Abstract
Hypothermia is employed as a method to diminish metabolism rates and preserve tissues and cells. However, low temperatures constitute a stress that produces biochemical changes whose extension depends on the duration and degree of cold exposure and is manifested when physiological temperature is restored. For many cellular types, cold induces an oxidative stress that is dependent on the elevation of intracellular iron, damages macromolecules, and is prevented by the addition of iron chelators. Pisum sativum Ferredoxin-NADP(H) Reductase (FNR) has been implicated in protection from injury mediated by intracellular iron increase and successfully used to reduce oxidative damage on bacterial, plant and mammalian systems. In this work, FNR was expressed in Cos-7 cells; then, they were submitted to cold incubation and iron overload to ascertain whether this enzyme was capable of diminishing the harm produced by these challenges. Contrary to expected, FNR was not protective and even exacerbated the damage under certain circumstances. It was also found that the injury induced by hypothermia in Cos-7 cells presented both iron-dependent and iron-independent components of damage when cells were actively dividing but only iron-independent component when cells were in an arrested state. This is in agreement with previous findings which showed that iron-dependent damage is also an energy-dependent process.
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Affiliation(s)
- M Pucci Molineris
- Centro Binacional, Argentina-Italia de Investigaciones en Criobiología Clínica y Aplicada, Universidad Nacional de Rosario, Av Arijón 28 bis, 2000 Rosario, Argentina
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23
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Giraud S, Bon D, Neuzillet Y, Thuillier R, Eugene M, Hauet T, Barrou B. Concentration and chain length of polyethylene glycol in islet isolation solution: evaluation in a pancreatic islet transplantation model. Cell Transplant 2012; 21:2079-88. [PMID: 22507302 DOI: 10.3727/096368912x638928] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
To improve graft preservation and consequently reduce conservation injuries, the composition of preservation solution is of outmost importance. It was demonstrated that the colloid polyethylene glycol (PEG), used in SCOT solution, has protective effects on cell membranes and immunocamouflage properties. The aim of this study was to optimize the concentration and chain length of PEG to improve pancreatic islet preservation and outcome. In a model of murine islet allotransplantation, islets were isolated with SCOT containing various concentrations of PEG 20 kDa or 35 kDa. Better islet yield (IEQ) was obtained with SCO +PEG at 15-30 g/L versus other PEG concentrations and control CMRL-1066 + 1% BSA solution (p < 0.05). Allograft survival was better prolonged (up to 20 days) in the groups SCOT + PEG 20 kDa 10-30 g/L compared to PEG 35 kDa (less than 17.8 days) and to control solutions (less than 17.5 days). In terms of graft function recovery, the use of PEG 20 kDa 15-30 g/L induced no primary nonfunction and delayed graft function contrary to CMRL-1066 and other PEG solutions. The use of the extracellular-type solution SCOT containing PEG 20 kDa 15 g/L as colloid could be a new way to optimize graft integrity preservation and allograft outcome.
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Yandza T, Tauc M, Canioni D, Rogel-Gaillard C, Bernard G, Bernard A, Gugenheim J. Effect of polyethylene glycol in pig intestinal allotransplantation without immunosuppression. J Surg Res 2011; 176:621-8. [PMID: 22137987 DOI: 10.1016/j.jss.2011.10.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Revised: 10/01/2011] [Accepted: 10/13/2011] [Indexed: 12/17/2022]
Abstract
OBJECTIVES We evaluated whether IGL-1, a graft preservation solution containing polyethylene glycol, improves the outcome of small bowel grafts in comparison to the University of Wisconsin (UW) solution in a pig allotransplantation model. MATERIALS AND METHODS Seventeen pigs were randomly allocated to group 1 (n = 10; intestinal allotransplantation with IGL-1) and group 2 (n = 7; allotransplantation with UW). Pigs received no immunosuppression and were sacrificed on postoperative d (POD) 8. Intestinal specimens were obtained from the animal immediately before cold flushing (T0), 2 h after graft reperfusion (T1), and at sacrifice (T2). RESULTS Survival rate to POD 8 was 50% in group 1 compared with 16% in group 2 (P < 0.05); 62% of pigs in group 1 did not present any acute cellular rejection (ACR) compared to 16% in group 2 (P < 0.05). Severe ACR rate was 25% in group 1 and 66% in group 2 (P < 0.05). iNOS activity and intestinal caspase 3 levels increased significantly between T0 and T1 in group 1 compared to group 2 (P < 0.05). Cell necrosis increased significantly between TO and T1 in group 2 compared with group 1 (P < 0.05) whereas cell apoptosis was significantly higher at T1 compared with T0 in group 1 in comparison to group 2. CONCLUSIONS Our results show that IGL-1 improves intestinal graft viability as compared to UW solution, possibly by reducing graft immunogenicity and by favoring intestinal epithelial repair.
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Affiliation(s)
- Thierry Yandza
- Pôle Digestif, Unité de Support Nutritionnel et de Greffes Intestinales, 3ème B, Hôpital de, l'Archet 2, Centre Hospitalo-Universitaire de Nice, Nice, France.
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25
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Thuillier R, Dutheil D, Trieu MTN, Mallet V, Allain G, Rousselot M, Denizot M, Goujon JM, Zal F, Hauet T. Supplementation with a new therapeutic oxygen carrier reduces chronic fibrosis and organ dysfunction in kidney static preservation. Am J Transplant 2011; 11:1845-60. [PMID: 21875432 DOI: 10.1111/j.1600-6143.2011.03614.x] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Static preservation is currently the most widely used organ preservation strategy; however, decreased donor organ quality is impacting outcome negatively. M101 is an O₂ carrier with high-oxygen affinity and the capacity to function at low temperatures. We tested the benefits of M101 both in vitro, on cold preserved LLC-PK1, as well as in vivo, in a large white pig kidney autotransplantation model. In vitro, M101 supplementation reduced cold storage-induced cell death. In vivo, early follow-up demonstrated superiority of M101-supplemented solutions, lowering the peak of serum creatinine and increasing the speed of function recovery. On the longer term, supplementation with M101 reduced kidney inflammation levels and maintained structural integrity, particularly with University of Wisconsin (UW). At the end of the 3-month follow-up, M101 supplementation proved beneficial in terms of survival and function, as well as slowing the advance of interstitial fibrosis. We show that addition of M101 to classic organ preservation protocols with UW and Histidine-Tryptophane-Ketoglutarate, the two most widely used solutions worldwide in kidney preservation, provides significant benefits to grafts, both on early function recovery and outcome. Simple supplementation of the solution with M101 is easily translatable to the clinic and shows promises in terms of outcome.
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Affiliation(s)
- R Thuillier
- Inserm U927, Faculté de Médecine et Pharmacie, University of Poitiers, Poitiers, F86000, France
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Hypothermic kidney preservation: a remembrance of the past in the future? Curr Opin Organ Transplant 2011; 16:162-8. [DOI: 10.1097/mot.0b013e3283446b07] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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27
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Improving Long-Term Outcome in Allograft Transplantation: Role of Ionic Composition and Polyethylene Glycol. Transplantation 2011; 91:605-14. [DOI: 10.1097/tp.0b013e3182090fa3] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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28
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Contribution of large pig for renal ischemia-reperfusion and transplantation studies: the preclinical model. J Biomed Biotechnol 2011; 2011:532127. [PMID: 21403881 PMCID: PMC3051176 DOI: 10.1155/2011/532127] [Citation(s) in RCA: 125] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2010] [Revised: 12/21/2010] [Accepted: 01/03/2011] [Indexed: 01/08/2023] Open
Abstract
Animal experimentation is necessary to characterize human diseases and design adequate therapeutic interventions. In renal transplantation research, the limited number of in vitro models involves a crucial role for in vivo models and particularly for the porcine model. Pig and human kidneys are anatomically similar (characterized by multilobular structure in contrast to rodent and dog kidneys unilobular). The human proximity of porcine physiology and immune systems provides a basic knowledge of graft recovery and inflammatory physiopathology through in vivo studies. In addition, pig large body size allows surgical procedures similar to humans, repeated collections of peripheral blood or renal biopsies making pigs ideal for medical training and for the assessment of preclinical technologies. However, its size is also its main drawback implying expensive housing. Nevertheless, pig models are relevant alternatives to primate models, offering promising perspectives with developments of transgenic modulation and marginal donor models facilitating data extrapolation to human conditions.
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29
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Thuillier R, Renard C, Rogel-Gaillard C, Demars J, Milan D, Forestier L, Ouldmoulene A, Goujon JM, Badet L, Hauet T. Effect of polyethylene glycol-based preservation solutions on graft injury in experimental kidney transplantation. Br J Surg 2010; 98:368-78. [DOI: 10.1002/bjs.7332] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/23/2010] [Indexed: 12/12/2022]
Abstract
Abstract
Background
New preservation solutions are emerging, of various ionic compositions and with hydroxyethyl starch replaced by polymers such as polyethylene glycols (PEGs), offering the potential for ‘immunocamouflage’. This experimental study investigated which of three clinically available preservation protocols offered the best graft protection, based on epithelial-to-mesenchymal transition (EMT) and fibrosis.
Methods
Kidneys were preserved for 24 h at 4 °C with University of Wisconsin solution (UW) as standard, compared with solutions containing either 1 g/l PEG 35 kDa (Institute Georges Lopez solution, IGL) or 30g/l PEG 20 kDa (solution de conservation des organes et des tissus, SCOT). Animals were followed for up to 3 months and development of EMT, tubular atrophy and fibrosis was evaluated in comparison with sham-operated animals.
Results
Functional recovery was better in the SCOT group compared with the other groups. Chronic fibrosis, EMT and inflammation were observed in the UW and IGL groups, but limited in the SCOT group. Levels of profibrosis markers such as transforming growth factor β1, plasminogen activator inhibitor 1 and connective tissue growth factor were increased in IGL and UW groups compared with the SCOT group. Hypoxia-inducible factor (HIF) 1α and 2α expression was increased at 3 months in grafts preserved in UW and IGL, but detected transiently on day 14 when SCOT was used. Expression of HIF-regulated genes vascular endothelial growth factor and erythropoietin was increased in UW and IGL groups.
Conclusion
The choice of colloid and ionic content is paramount in providing long-term protection against chronic graft injury after renal transplantation. Preservation solutions based on PEGs may optimize graft quality.
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Affiliation(s)
- R Thuillier
- Institut National de la Santé et de la Recherche Médicale (INSERM) U927 and Université de Poitiers, Poitiers, France
- Centre Hospitalier Universitaire de Poitiers, Poitiers, France
- Fédération pour l'Étude de l'Ischémie Reperfusion en Transplantation (FLIRT), Poitiers, France
| | - C Renard
- Laboratoire de Radiobiologie et d'Étude du Génome, Unité Mixte de Recherche (UMR) 1061, Commissariat à l'Énergie Atomique-Institut National de la Recherche Agronomique (INRA), Jouy-en-Josas, France
| | - C Rogel-Gaillard
- Laboratoire de Radiobiologie et d'Étude du Génome, Unité Mixte de Recherche (UMR) 1061, Commissariat à l'Énergie Atomique-Institut National de la Recherche Agronomique (INRA), Jouy-en-Josas, France
| | - J Demars
- Laboratoire de Génétique Cellulaire, UMR 444, INRA, Castanet Tolosan, Limoges, France
| | - D Milan
- Laboratoire de Génétique Cellulaire, UMR 444, INRA, Castanet Tolosan, Limoges, France
| | - L Forestier
- Laboratoire de Génétique Moléculaire Animale, UMR 1061, Limoges, France
| | - A Ouldmoulene
- Laboratoire de Génétique Moléculaire Animale, UMR 1061, Limoges, France
| | - J M Goujon
- Institut National de la Santé et de la Recherche Médicale (INSERM) U927 and Université de Poitiers, Poitiers, France
| | - L Badet
- Institut National de la Santé et de la Recherche Médicale (INSERM) U927 and Université de Poitiers, Poitiers, France
- Fédération pour l'Étude de l'Ischémie Reperfusion en Transplantation (FLIRT), Poitiers, France
- Université Claude Bernard Lyon 1, Villeurbanne, France
- CENTAURE Network, Nantes, France
| | - T Hauet
- Centre Hospitalier Universitaire de Poitiers, Poitiers, France
- Fédération pour l'Étude de l'Ischémie Reperfusion en Transplantation (FLIRT), Poitiers, France
- Plateforme IBiSA, Génétique et Expérimentation en Productions Animales, INRA, Domaine du Magneraud, Surgères, France
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30
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Sainz M, Díaz P, Monza J, Borsani O. Heat stress results in loss of chloroplast Cu/Zn superoxide dismutase and increased damage to Photosystem II in combined drought-heat stressed Lotus japonicus. PHYSIOLOGIA PLANTARUM 2010; 140:46-56. [PMID: 20487374 DOI: 10.1111/j.1399-3054.2010.01383.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Drought and heat stress have been studied extensively in plants, but most reports involve analysis of response to only one of these stresses. Studies in which both stresses were studied in combination have less commonly been reported. We report the combined effect of drought and heat stress on Photosystem II (PSII) of Lotus japonicus cv. Gifu plants. Photochemistry of PSII was not affected by drought or heat stress alone, but the two stresses together decreased PSII activity as determined by fluorescence emission. Heat stress alone resulted in degradation of D1 and CP47 proteins, and D2 protein was also degraded by combined drought-heat stress. None of these proteins were degraded by drought stress alone. Drought alone induced accumulation of hydrogen peroxide but the drought-heat combination led to an increase in superoxide levels and a decrease in hydrogen peroxide levels. Furthermore, combined drought-heat stress was correlated with an increase in oxidative damage as determined by increased levels of thiobarbituric acid reactive substances. Heat also induced degradation of chloroplast Cu/Zn superoxide dismutase (SOD: EC 1.15.1.1) as shown by reduced protein levels and isozyme-specific SOD activity. Loss of Cu/Zn SOD and induction of catalase (CAT: EC 1.11.1.6) activity would explain the altered balance between hydrogen peroxide and superoxide in response to drought vs combined drought-heat stress. Degradation of PSII could thus be caused by the loss of components of chloroplast antioxidant defence systems and subsequent decreased function of PSII. A possible explanation for energy dissipation by L. japonicus under stress conditions is discussed.
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Affiliation(s)
- Martha Sainz
- Laboratorio de Bioquímica, Departamento de Biología Vegetal, Facultad de Agronomía, Universidad de la República, CP 12900, Montevideo, Uruguay
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Zaouali MA, Ben Abdennebi H, Padrissa-Altés S, Mahfoudh-Boussaid A, Roselló-Catafau J. Pharmacological strategies against cold ischemia reperfusion injury. Expert Opin Pharmacother 2010; 11:537-55. [PMID: 20163266 DOI: 10.1517/14656560903547836] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
IMPORTANCE OF THE FIELD Good organ preservation is a determinant of graft outcome after revascularization. The necessity of increasing the quality of organ preservation, as well as of extending cold storage time, has made it necessary to consider the use of pharmacological additives. AREAS COVERED IN THIS REVIEW The complex physiopathology of cold-ischemia-reperfusion (I/R) injury--and in particular cell death, mitochondrial injury and endoplasmic reticulum stress--are reviewed. Basic principles of the formulation of the different preservation solutions are discussed. WHAT THE READER WILL GAIN Current strategies and new trends in static organ preservation using additives such as trimetazidine, polyethylene glycols, melatonin, trophic factors and endothelin antagonists in solution are presented and discussed. The benefits and mechanisms responsible for enhancing organ protection against I/R injury are also discussed. Graft preservation was substantially improved when additives were added to the preservation solutions. TAKE HOME MESSAGE Enrichment of preservation solutions by additives is clinically useful only for short periods. For longer periods of cold ischemia, the use of such additives becomes insufficient because graft function deteriorates as a result of ischemia. In such conditions, the preservation strategy should be changed by the use of machine perfusion in normothermic conditions.
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Affiliation(s)
- Mohamed Amine Zaouali
- Experimental Hepatic Ischemia-Reperfusion Unit, Institut d'Investigacions Biomèdiques de Barcelona, CSIC-IDIBAPS, C/Rosselló 161, 7th floor, E-08036-Barcelona, Spain.
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Pochylski M, Gapiński J. Brillouin Scattering Study of Polyethylene Glycol/Water System below Crystallization Temperature. J Phys Chem B 2010; 114:2644-9. [DOI: 10.1021/jp910783j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Jacek Gapiński
- Faculty of Physics, Adam Mickiewicz University, Poznań, Poland
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Polymer therapeutics move into the sepsis space*. Crit Care Med 2010; 38:730-1. [DOI: 10.1097/ccm.0b013e3181c8958b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Schreinemachers M, Doorschodt B, Florquin S, Tolba R. Comparison of Preservation Solutions for Washout of Kidney Grafts: An Experimental Study. Transplant Proc 2009; 41:4072-9. [DOI: 10.1016/j.transproceed.2009.09.089] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2009] [Revised: 09/14/2009] [Accepted: 09/29/2009] [Indexed: 01/27/2023]
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Nishigaki T, Teramura Y, Suemori H, Iwata H. Cryopreservation of primate embryonic stem cells with chemically-defined solution without Me2SO. Cryobiology 2009; 60:159-64. [PMID: 19857481 DOI: 10.1016/j.cryobiol.2009.10.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2009] [Revised: 10/02/2009] [Accepted: 10/13/2009] [Indexed: 12/27/2022]
Abstract
Human embryonic stem (hES) cells are expected to be useful in the fields of regenerative medicine and tissue engineering due to their pluripotency. Therefore, it is necessary to establish highly efficient and reliable methods for the cryopreservation of hES cells. We have cryopreserved cynomolgus and human ES cells by the vitrification method, using a chemically-defined dimethyl sulfoxide (Me(2)SO)-free and serum-free medium composed of Euro-Collins solution as a base medium and 40% (v/v) ethylene glycol (EG) and 10% (w/v) polyethylene glycol (PEG) as cryoprotectants. When the vitrification and the cryoprotectants were combined, the recovery ratio of hES cells was 22.9+/-7.7%, compared to 0.4+/-0.2% when the conventional slow-freezing method was used. After the cryopreservation and thawing cycle, hES cells were easily cultured and expressed undifferentiated cell markers such as Nanog, Oct-4, SSEA-4, and alkaline phosphatase activity after several subculturing steps. We also found that the pluripotency of hES cells was maintained, as demonstrated by teratoma formation of ES cells transplanted into severe combined immunodeficient (SCID) mice. Thus, we conclude that we have successfully cryopreserved primate ES cells with high efficiency using a Me(2)SO-free, chemically-defined medium.
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Affiliation(s)
- Tatsuya Nishigaki
- Department of Reparative Materials, Institute for Frontier Medical Sciences, Kyoto University, Japan
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Saba H, Munusamy S, MacMillan-Crow LA. Cold Preservation Mediated Renal Injury: Involvement of Mitochondrial Oxidative Stress. Ren Fail 2009; 30:125-33. [DOI: 10.1080/08860220701813327] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Favreau F, Rossard L, Zhang K, Desurmont T, Manguy E, Belliard A, Fabre S, Liu J, Han Z, Thuillier R, Papadopoulos V, Hauet T. Expression and modulation of translocator protein and its partners by hypoxia reoxygenation or ischemia and reperfusion in porcine renal models. Am J Physiol Renal Physiol 2009; 297:F177-90. [PMID: 19386723 DOI: 10.1152/ajprenal.90422.2008] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Translocator protein (TSPO), formerly known as the peripheral-type benzodiazepine receptor, is an 18-kDa drug- and cholesterol-binding protein localized to the outer mitochondrial membrane and implicated in a variety of cell and mitochondrial functions. To determine the role of TSPO in ischemia-reperfusion injury (IRI), we used both in vivo and in vitro porcine models: an in vivo renal ischemia model where different conservation modalities were tested and an in vitro model where TSPO-transfected porcine proximal tubule LLC-PK(1) cells were exposed to hypoxia and oxidative stress. The expression of TSPO and its partners in steroidogenic cells, steroidogenic acute regulatory protein (StAR) and cytochrome P-450 side chain cleavage CYP11A1, as well as the impact of TSPO overexpression and exposure to TSPO ligands in vitro in hypoxia-ischemia conditions were investigated. Hypoxia induced caspase activation, reduction of ATP content, and LLC-PK(1) cell death. Transfection and overexpression of TSPO rescued the cells from the detrimental effects of hypoxia and reoxygenation. Moreover, TSPO overexpression was accompanied by a reduction of H(2)O(2)-induced necrosis. TSPO drug ligands did not affect TSPO-mediated functions. In vivo, TSPO expression was modulated by IRI and during regeneration particularly in proximal tubule cells, which do not express this protein at the basal level. Under the same conditions, StAR and CYP11A1 protein and gene expression was reduced without apparent relation to TSPO changes. Pregnenolone was identified and measured in the pig kidney. Pregnenolone synthesis was not affected by the experimental conditions used. Taken together, these results indicate that changes in TSPO expression in kidney regenerating tissue could be important for renal protection and maintenance of kidney function.
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Affiliation(s)
- Frederic Favreau
- Inserm, U927, Faculté de Médecine, Université de Poitiers, 86021 Poitiers Cedex, France
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Perrin H, Thaunat O, Malcus C, Badet L, Hennino A, Codas R, Touraine-Moulin F, Nicolas JF, Morelon E. Immunoprotection by polyethylene glycol in organ preservation solutions is not due to an immunomasking effect. Nephrol Dial Transplant 2009; 24:1682-5. [DOI: 10.1093/ndt/gfp044] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Dutheil D, Underhaug Gjerde A, Petit-Paris I, Mauco G, Holmsen H. Polyethylene glycols interact with membrane glycerophospholipids: is this part of their mechanism for hypothermic graft protection? J Chem Biol 2009; 2:39-49. [PMID: 19568791 DOI: 10.1007/s12154-009-0014-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2008] [Accepted: 01/08/2009] [Indexed: 02/08/2023] Open
Abstract
Polyethylene glycol (PEG), a high-molecular-weight colloid present in new organ preservation solutions, protects against cold ischemia injuries leading to better graft function of transplanted organs. This protective effect cannot be totally explained by immuno-camouflaging property or signaling-pathway modifications. Therefore, we sought for an alternative mechanism dependent on membrane fluidity. Using the Langmuir-Pockles technique, we show here that PEGs interacted with lipid monolayers of defined composition or constituted by a renal cell lipid extract. High-molecular-weight PEGs stabilized the lipid monolayer at low surface pressure. Paradoxically, at high surface pressure, PEGs destabilized the monolayers. Hypothermia reduced the destabilization of saturated monolayer whereas unsaturated monolayer remained unaffected. Modification of ionic strength and pH induced a stronger stabilizing effect of PEG 35,000 Da which could explain its reported higher effectiveness on cold-induced injuries during organ transplantation. This study sheds a new light on PEG protective effects during organ preservation different from all classical hypotheses.
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Abstract
Until recently, research on transplantation rejection and tolerance has been directed toward deciphering the mechanisms of the adaptive immune system. However, the emergence that the innate immune system, the body's first-line defense against pathogens, has a strong influence on adaptive immunity has galvanized interest in elucidating the interplay between these two arms of the immune system. The discovery of Toll-like receptors and the characterization of the cellular mediators involved in innate immunity have provided growing evidence that innate immunity affects the adaptive immune response. Emerging evidence has also shown that early "danger signals"' associated with ischemia-reperfusion injury or brain death contribute to innate immune activation, promoting rejection, and inhibiting tolerance induction. In addition, nonspecific stimuli such as increased donor age or patient disease may also serve to exert a synergistic influence on innate immune activation. Ultimately, controlling the events in innate immune activation may help drive tolerance induction and reduce the rate of rejection.
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Schreinemachers MCJM, Doorschodt BM, Florquin S, van den Bergh Weerman MA, Reitsma JB, Lai W, Sitzia M, Minor TM, Tolba RH, van Gulik TM. Improved preservation and microcirculation with POLYSOL after transplantation in a porcine kidney autotransplantation model. Nephrol Dial Transplant 2008; 24:816-24. [DOI: 10.1093/ndt/gfn559] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
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Abstract
The storage conditions of the donor kidney may influence the deleterious consequences of ischemia/reperfusion (IR), which remains a major source of complications in clinical practice. Delayed graft function (DGF), seen in 20% to 50% of transplanted cadaver kidneys, is a major risk factor affecting early and long-term graft survival, patient management, and costs of transplantation. Cold preservation plays a key role in this process and is based on hypothermia and high potassium solutions. In this review, the authors focused on the major molecular mechanisms of cold storage (CS) injury at the cellular level, which have been recently evidenced with modern biochemical and cell biologic methods. These newly uncovered aspects of cold preservation injury are often not fully addressed by preservation solutions in current clinical practice. The role of new molecules such as polyethylene glycol (PEG) is presented and their properties are analyzed in the organ preservation context. PEG improves organ function recovery and reduces inflammation and fibrosis development in several models. Because organs shortage is also a real public health problem, organs from non-heart beating donors or marginal donors are now used to expand pool of organs. As a consequence, the development of better organ preservation methods remains a major target and deserves scientific consideration.
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Maathuis MHJ, Ottens PJ, van Goor H, Zwaagstra JJ, Wiersema-Buist J, Schuurs TA, Ploeg RJ, Leuvenink HGD. Static cold storage preservation of ischemically damaged kidneys. a comparison between IGL-1 and UW solution. Transpl Int 2008; 21:473-82. [PMID: 18225993 DOI: 10.1111/j.1432-2277.2007.00634.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Especially in damaged organs, adequate organ preservation is critically important to maintain viability. Institut Georges Lopez-1 (IGL-1) is a new preservation solution, with an extracellular sodium/potassium ratio and polyethylene glycol as a colloid. The influence of warm and cold ischemia was evaluated in a rat Lewis-Lewis transplant model with a follow up of 14 days. Eight groups of donation after cardiac death donor kidneys were studied with warm ischemia of 0 and 15 min followed by 0- or 24-h cold storage (CS) preservation in IGL-1 or UW-CSS. Blood was collected daily during the first week and at day 14. Recipients were placed in metabolic cages at day 4 and 14 after transplantation allowing urine collection and adequate measurement of glomerular filtration rate. Focussing on inflammation, reactive oxygen species production, proximal tubule damage, proteinuria, histology, and renal function after transplantation we could not show any relevant difference between IGL-1 and UW-CSS. Furthermore, the combination of 15-min warm ischemia and by 24-h cold ischemia did not result in life sustaining kidney function after transplantation, irrespective of the used solution. In the present experiment, static CS preservation of ischemically damaged rat kidneys in either IGL-1 or UW-CSS rendered equal results after transplantation.
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Affiliation(s)
- Mark-Hugo J Maathuis
- University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
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Karhumäki P, Tiitinen SL, Turpeinen H, Parkkinen J. Inhibition of ERK1/2 activation by phenolic antioxidants protects kidney tubular cells during cold storage. Transplantation 2007; 83:948-53. [PMID: 17460567 DOI: 10.1097/01.tp.0000259249.24268.34] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Cold storage of tissues induces reactive oxygen species (ROS), which contribute to cell injury. We have compared different antioxidants in protection of renal tubular cells against hypothermia injury and studied their effect on cold-induced mitogen-activated protein (MAP) kinase activation. METHODS Cultured renal tubular epithelial cells (LLC-PK1) were stored in University of Wisconsin solution supplemented with compounds tested for 16 hr at 4 degrees C. Release of lactate dehydrogenase and cellular adenosine triphosphate were measured. Activation of MAP kinases was determined by Western blotting. Intracellular ROS were monitored with a fluorescent probe. RESULTS Cold storage resulted in a substantial loss of cell viability. The simple phenol butylated hydroxyanisol (BHA) most effectively prevented hypothermia-induced cell injury, whereas about 100-fold higher concentration of the polyphenol epigallocatechin gallate (EGCG) was needed, although EGCG most effectively scavenged intracellular ROS elicited by serum withdrawal. The MEK inhibitor U0126 and reduced nicotinamide adenine dinucleotide phosphate (NADPH) oxidase inhibitor diphenyleneiodonium effectively protected the cells against hypothermia injury. ERK1/2 was rapidly activated during chilling of the cells and this was inhibited by BHA but not by EGCG. CONCLUSION The results suggest that chilling of renal epithelial cells induces ROS generation by NADPH oxidase, which leads to rapid activation of the MEK-ERK1/2 cascade and initiation of cell injury. This can be prevented by antioxidants.
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Giraud S, Sebastien G, Claire B, Blandine C, Eugene M, Michel E, Debre P, Patrice D, Richard F, François R, Barrou B, Benoit B. A New Preservation Solution Increases Islet Yield and Reduces Graft Immunogenicity in Pancreatic Islet Transplantation. Transplantation 2007; 83:1397-400. [PMID: 17519794 DOI: 10.1097/01.tp.0000261636.16197.45] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The aim of the study was to test a new preservation solution containing polyethylene glycol (S.C.O.T. solution) as pancreatic islet isolation medium both to increase the islet yield and to prolong the allograft survival. In a model of islet transplantation in diabetic mouse, islets were isolated with S.C.O.T. in experimental groups and with Hank's balanced salt solution (HBSS) in control groups. The use of S.C.O.T. solution improved the islet yield (596+/-27 IEQ/pancreas) as compared to HBSS (456+/-11 IEQ/pancreas) (P<0.001). Allograft survival was prolonged in experimental group (17.3+/-4.3 days) versus controls (7.3+/-3.6 days) in a full mismatch combination (P<0.001) and in absence of recipient immunosuppression. The same prolongation (10 days) was also found in a strongly alloreactive transgenic combination. It is hypothesized that a transitory phenomenon of immunocamouflage of the graft surface antigens occurs, as shown by immunofluorescence studies. The use of this new solution could improve the results of islet transplantation in humans.
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Affiliation(s)
- Sebastien Giraud
- Université Pierre et Marie Curie-Paris6, UMR S543, Pitié Salpetrière, Paris, France
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