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Melczer M, Jiménez Lamana J, Justo-Vega A, Hanser O, Ndaw S, Lobinski R. Multielement analysis of single red blood cells by single cell - inductively coupled plasma tandem mass spectrometry. Talanta 2024; 267:125226. [PMID: 37742394 DOI: 10.1016/j.talanta.2023.125226] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 08/23/2023] [Accepted: 09/19/2023] [Indexed: 09/26/2023]
Abstract
A method for the analysis of essential metals (Fe, Cu, Mg, and Zn) and non-metals (P, S) in single red blood cells was developed by single cell (SC)-ICP-MS. The use of a triple quadrupole configuration (MS/MS) enabled an effective elimination of polyatomic interferences, which affect the accuracy of ICP-MS analysis using a single quadrupole mass analyzer. Fixation with glutaraldehyde for at least 90 days was developed to improve the quantification of elements in a single red blood cell. The experimental conditions were optimized while special attention was paid to the residence time of analytes in the plasma. Addition of a surfactant (0.05% (v/v) Tween80®) improved quantification of elements in fixed red blood cells. The detection limits obtained by SC-ICP-MS/MS were lower than for ICP-MS, especially for S and P (3 fg and 1.7 fg. cell-1 instead of 163 and 6.3 fg. cell-1, respectively).
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Affiliation(s)
- Mathieu Melczer
- French Research and Safety Institute for the Prevention of Occupational Accidents and Diseases (INRS), Toxicology and Biomonitoring Division, 1 Rue Morvan, F-54519, Vandoeuvre les Nancy, France.
| | - Javier Jiménez Lamana
- Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS, Institute of Analytical and Physical Chemistry for Environment and Materials (IPREM-UMR5254), 64053, Pau, France
| | - Ana Justo-Vega
- Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS, Institute of Analytical and Physical Chemistry for Environment and Materials (IPREM-UMR5254), 64053, Pau, France; Group of Trace Elements, Spectroscopy and Speciation (GETEE), Materials Institute (iMATUS), Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Chemistry, University of Santiago de Compostela, Avda das Ciencias, s/n, 15782, Santiago de Compostela, Spain
| | - Ogier Hanser
- French Research and Safety Institute for the Prevention of Occupational Accidents and Diseases (INRS), Toxicology and Biomonitoring Division, 1 Rue Morvan, F-54519, Vandoeuvre les Nancy, France
| | - Sophie Ndaw
- French Research and Safety Institute for the Prevention of Occupational Accidents and Diseases (INRS), Toxicology and Biomonitoring Division, 1 Rue Morvan, F-54519, Vandoeuvre les Nancy, France
| | - Ryszard Lobinski
- Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS, Institute of Analytical and Physical Chemistry for Environment and Materials (IPREM-UMR5254), 64053, Pau, France; Chair of Analytical Chemistry, Faculty of Chemistry, Warsaw University of Technology, ul. Noakowskiego 3, 00-664, Warswawa, Poland
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Hu Y, Liu X, Liu F, Xie J, Zhu Q, Tan S. Trehalose in Biomedical Cryopreservation-Properties, Mechanisms, Delivery Methods, Applications, Benefits, and Problems. ACS Biomater Sci Eng 2023; 9:1190-1204. [PMID: 36779397 DOI: 10.1021/acsbiomaterials.2c01225] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
Cells and tissues are the foundation of translational medicine. At present, one of the main technological obstacles is their preservation for long-term usage while maintaining adequate viability and function. Optimized storage techniques must be developed to make them safer to use in the clinic. Cryopreservation is the most common long-term preservation method to maintain the vitality and function of cells and tissues. But, the formation of ice crystals in cells and tissues is considered to be the main mechanism that could harm cells and tissues during freezing and thawing. To reduce the formation of ice crystals, cryoprotective agents (CPAs) must be added to the cells and tissues to achieve the cryoprotective effect. However, conventional cryopreservation of cells and tissues often needs to use toxic organic solvents as CPAs. As a result, cryopreserved cells and tissues may need to go through a time-consuming washing process to remove CPAs for further applications in translational medicine, and multiple valuable cells are potentially lost or killed. Currently, trehalose has been researched as a nontoxic CPA due to its cryoprotective ability and stability during cryopreservation. Nevertheless, trehalose is a nonpermeable CPA, and the lack of an effective intracellular trehalose delivery method has become the main obstacle to its use in cryopreservation. This article illustrated the properties, mechanisms, delivery methods, and applications of trehalose, summarized the benefits and limits of trehalose, and summed up the findings and research direction of trehalose in biomedical cryopreservation.
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Affiliation(s)
- Yuying Hu
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Xiangjian Liu
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Fenglin Liu
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Jingxian Xie
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Qubo Zhu
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Songwen Tan
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
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Exploring the application and mechanism of sodium hyaluronate in cryopreservation of red blood cells. Mater Today Bio 2021; 12:100156. [PMID: 34825160 PMCID: PMC8603211 DOI: 10.1016/j.mtbio.2021.100156] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 11/04/2021] [Accepted: 11/09/2021] [Indexed: 01/02/2023] Open
Abstract
The cryopreservation of red blood cells (RBCs) is essential for transfusion therapy and maintaining the inventory of RBCs units. The existing cryoprotectants (CPAs) have many defects, and the search for novel CPAs is becoming a research hotspot. Sodium hyaluronate (SH) is polymerized from sodium glucuronate and N-acetylglucosamine, which has good water binding capacity and biocompatibility. Herein, we reported for the first time that under the action of medium molecular weight sodium hyaluronate (MSH), the thawed RBCs recovery increased from 33.1 ± 5.8% to 63.2 ± 3.5%. In addition, RBCs functions and properties were maintained normally, and the residual MSH could be removed by direct washing. When MSH was used with a very low concentration (5% v/v) of glycerol (Gly), the thawed RBCs recovery could be increased to 92.3 ± 4.6%. In general, 40% v/v Gly was required to achieve similar efficiency. A mathematical model was used to compare the performance of MSH, PVA and trehalose in cryopreservation, and MSH showed the best efficiency. It was found that MSH could periodically regulate the content of intracellular water through the “reservoir effect” to reduce the damages during freezing and thawing. Moreover, MSH could inhibit ice recrystallization when combined with RBCs. The high viscosity and strong water binding capacity of MSH was also conducive to reducing the content of ice. This works points out a new direction for cryopreservation of RBCs and may promote transfusion therapy in clinic. MSH improved the RBCs recovery in cryopreservation. MSH can be removed directly after thawing. The properties and functions of RBCs were protected by MSH. High RBCs recovery is found using MSH with 5% v/v glycerol. The mathematical model is studied for the cryopreservation. The mechanism is proposed for cryopreservation using MSH.
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El-Marakby SM, Selim NS, Desouky OS, Ashry HA, Sallam AM. Radio-mitigation effect of poly-MVA after exposure to an acute dose of gamma radiation. JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE 2018. [DOI: 10.1016/j.jtusci.2015.06.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Seham M. El-Marakby
- Biophysics Lab, Radiation Physics Department, National Center for Radiation Research and Technology (NCRRT), AEA, P.O. Box 29, Madinat Nasr, Cairo, Egypt
| | - Nabila S. Selim
- Biophysics Lab, Radiation Physics Department, National Center for Radiation Research and Technology (NCRRT), AEA, P.O. Box 29, Madinat Nasr, Cairo, Egypt
| | - Omar S. Desouky
- Biophysics Lab, Radiation Physics Department, National Center for Radiation Research and Technology (NCRRT), AEA, P.O. Box 29, Madinat Nasr, Cairo, Egypt
| | - Hoda A. Ashry
- Biophysics Lab, Radiation Physics Department, National Center for Radiation Research and Technology (NCRRT), AEA, P.O. Box 29, Madinat Nasr, Cairo, Egypt
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Zemlianskykh NG. The Effects of Cryoprotective Substances on the Mechanical Stability and Geometric Parameters of Human Erythrocytes. Biophysics (Nagoya-shi) 2018. [DOI: 10.1134/s0006350918010219] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Stefanic M, Ward K, Tawfik H, Seemann R, Baulin V, Guo Y, Fleury JB, Drouet C. Apatite nanoparticles strongly improve red blood cell cryopreservation by mediating trehalose delivery via enhanced membrane permeation. Biomaterials 2017. [DOI: 10.1016/j.biomaterials.2017.06.018] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Elliott GD, Wang S, Fuller BJ. Cryoprotectants: A review of the actions and applications of cryoprotective solutes that modulate cell recovery from ultra-low temperatures. Cryobiology 2017; 76:74-91. [DOI: 10.1016/j.cryobiol.2017.04.004] [Citation(s) in RCA: 180] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 04/07/2017] [Accepted: 04/16/2017] [Indexed: 02/08/2023]
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Abstract
High levels of penetrating cryoprotectants (CPAs) can eliminate ice formation during cryopreservation of cells, tissues, and organs to cryogenic temperatures. But CPAs become increasingly toxic as concentration increases. Many strategies have been attempted to overcome the problem of eliminating ice while minimizing toxicity, such as attempting to optimize cooling and warming rates, or attempting to optimize time of adding individual CPAs during cooling. Because strategies currently used are not adequate, CPA toxicity remains the greatest obstacle to cryopreservation. CPA toxicity stands in the way of cryogenic cryopreservation of human organs, a procedure that has the potential to save many lives. This review attempts to describe what is known about CPA toxicity, theories of CPA toxicity, and strategies to reduce CPA toxicity. Critical analysis and suggestions are also included.
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Hyono A, Yonezawa T, Kawai K, Abe S, Fujihara M, Azuma H, Wakamoto S. SEM observation of the live morphology of human red blood cells under high vacuum conditions using a novel RTIL. SURF INTERFACE ANAL 2014. [DOI: 10.1002/sia.5471] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Atsushi Hyono
- Division of Materials Science and Engineering, Faculty of Engineering; Hokkaido University; Kita 13, Nishi 8, Kita-ku Sapporo 060-8628 Japan
| | - Tetsu Yonezawa
- Division of Materials Science and Engineering, Faculty of Engineering; Hokkaido University; Kita 13, Nishi 8, Kita-ku Sapporo 060-8628 Japan
| | - Koji Kawai
- Miyoshi Oil and Fat Co., Ltd.; 4-66-1 Horikiri, Katsushika-ku Tokyo 124-8510 Japan
| | - Shigeaki Abe
- Graduate School of Dental Medicine; Hokkaido University; Kita 13, Nishi 7, Kita-ku Sapporo 060-8586 Japan
| | - Mitsuhiro Fujihara
- Japanese Red Cross; Hokkaido Block Blood Center; 2-1-20 Nijuyonken 2jou, Nishi-ku Sapporo 060-0802 Japan
| | - Hiroshi Azuma
- Department of Pediatrics; Asahikawa Medical University; Higashi 2-1-1-1, Midorigaoka Asahikawa 078-8510 Japan
| | - Shinobu Wakamoto
- Japanese Red Cross; Hokkaido Block Blood Center; 2-1-20 Nijuyonken 2jou, Nishi-ku Sapporo 060-0802 Japan
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Zhao H, Wang J, Cao Z, Lei J. Anticlotting membrane based on polypropylene grafted by biocompatible monomers under UV irradiation. J Appl Polym Sci 2011. [DOI: 10.1002/app.34461] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Lemos GSD, Márquez-Bernardes LF, Arvelos LR, Paraíso LF, Penha-Silva N. Influence of Glucose Concentration on the Membrane Stability of Human Erythrocytes. Cell Biochem Biophys 2011; 61:531-7. [DOI: 10.1007/s12013-011-9235-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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12
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Desouky OS, Selim NS, Elbakrawy EM, Rezk RA. Impact evaluation of α-lipoic acid in gamma-irradiated erythrocytes. Radiat Phys Chem Oxf Engl 1993 2011. [DOI: 10.1016/j.radphyschem.2010.09.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Changes in the intracellular Ca2+ content in human red blood cells in the presence of glycerol. Bioelectrochemistry 2008; 73:151-4. [DOI: 10.1016/j.bioelechem.2008.04.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2008] [Revised: 04/21/2008] [Accepted: 04/24/2008] [Indexed: 11/27/2022]
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Penha-Silva N, Arvelos L, Cunha C, Aversi-Ferreira T, Gouvêa-e-Silva L, Garrote-Filho M, Finotti C, Bernardino-Neto M, de Freitas Reis F. Effects of glycerol and sorbitol on the thermal dependence of the lysis of human erythrocytes by ethanol. Bioelectrochemistry 2008; 73:23-9. [DOI: 10.1016/j.bioelechem.2008.04.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2007] [Revised: 03/27/2008] [Accepted: 04/04/2008] [Indexed: 10/22/2022]
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15
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Effects of glycerol on the thermal dependence of the stability of human erythrocytes. J Bioenerg Biomembr 2007; 39:341-7. [DOI: 10.1007/s10863-007-9092-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2007] [Accepted: 05/15/2007] [Indexed: 10/22/2022]
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Bootsveld A, Degenhardt R, Kamp D, Haest CWM. On the mechanism of drug-induced acceleration of phospholipid translocation in the human erythrocyte membrane. Mol Membr Biol 2004; 21:315-22. [PMID: 15513739 DOI: 10.1080/09687860400003917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Small amphiphilic compounds (M(r)<200 Da) such as anaesthetics and hexane derivatives with different polar groups produced a concentration-dependent acceleration of the slow passive transbilayer movement of NBD-labelled phosphatidylcholine in the human erythrocyte membrane. Above a threshold concentration characteristic for each compound, the flip rate gradually increased at increasing concentrations in the medium. For compound concentrations required to produce a defined flip acceleration, corresponding membrane concentrations were estimated using reported octanol/water partition coefficients. The effective threshold membrane concentrations (50-150 mmol l(-1)) varied in the order: hexylamine>isoflurane=hexanoic acid>hexanol=chloroform>hexanethiol=1,1,2,2-tetrachloroethane>chlorohexane. Apolar hexane, which mainly distributes in the apolar membrane core, was much less effective and supersaturating concentrations were required to enhance flip. Localization of the drug at the lipid-water interface seems to be required for flip acceleration. Such a localization may increase the lateral pressure in this region and the bilayer curvature stress with concomitant decrease of order and rigidity at the interface. This unspecific bilayer perturbation is proposed to enhance the probability of formation of hydrophobic defects in the bilayer, facilitating penetration of the polar head group of the phospholipid into the apolar membrane core.
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Fahy GM, Wowk B, Wu J, Paynter S. Improved vitrification solutions based on the predictability of vitrification solution toxicity. Cryobiology 2004; 48:22-35. [PMID: 14969679 DOI: 10.1016/j.cryobiol.2003.11.004] [Citation(s) in RCA: 193] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2003] [Accepted: 11/18/2003] [Indexed: 11/23/2022]
Abstract
Long-term preservation of complex engineered tissues and organs at cryogenic temperatures in the absence of ice has been prevented to date by the difficulty of discovering combinations of cryoprotectants that are both sufficiently non-toxic and sufficiently stable to allow viability to be maintained and ice formation to be avoided during slow cooling to the glass transition temperature and subsequent slow rewarming. A new theory of the origin of non-specific cryoprotectant toxicity was shown to account, in a rabbit renal cortical slice model, for the toxicities of 20 vitrification solutions and to permit the design of new solutions that are dramatically less toxic than previously known solutions for diverse biological systems. Unfertilized mouse ova vitrified with one of the new solutions were successfully fertilized and regained 80% of the absolute control (untreated) rate of development to blastocysts, whereas ova vitrified in VSDP, the best previous solution, developed to blastocysts at a rate only 30% of that of controls. Whole rabbit kidneys perfused at -3 degrees C with another new solution at a concentration of cryoprotectant (8.4M) that was previously 100% lethal at this temperature exhibited no damage after transplantation and immediate contralateral nephrectomy. It appears that cryoprotectant solutions that are composed to be at the minimum concentrations needed for vitrification at moderate cooling rates are toxic in direct proportion to the average strength of water hydrogen bonding by the polar groups on the permeating cryoprotectants in the solution. Vitrification solutions that are based on minimal perturbation of intracellular water appear to be superior and provide new hope that the successful vitrification of natural organs as well as tissue engineered or clonally produced organ and tissue replacements can be achieved.
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Affiliation(s)
- Gregory M Fahy
- 21st Century Medicine, Inc., 10844 Edison Court, Rancho Cucamonga, CA 91730, USA.
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Nagasaka Y, Ishii F. Interaction between erythrocytes from three different animals and emulsions prepared with various lecithins and oils. Colloids Surf B Biointerfaces 2001; 22:141-147. [PMID: 11451660 DOI: 10.1016/s0927-7765(01)00148-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The hemolysis of various animal erythrocytes in emulsions prepared with various emulsifying agents (lecithins) and oils was examined. In the emulsions stabilized with different emulsifying agents, the degree of hemolysis increased in the order soybean lecithin<egg yolk lecithin<hydrogenated egg yolk lecithin<hydrogenated soybean lecithin. In the emulsions stabilized with phospholipids with different iodine values that describe the degree of unsaturation in the fatty acyl groups of phospholipids, the percentage hemolysis decreased with increasing iodine value. In addition, in emulsions prepared with various triglycerides as the oil phase the percentage hemolysis increased with increasing triglyceride acyl chain length. The percentage hemolysis of the different animal erythrocytes increased in the order sheep<rabbit<guinea pig according to phosphatidylcholine contents in erythrocyte membrane of each animal. These results suggested that hemolysis caused by the interaction between erythrocytes and emulsions was involved in phospholipid dispersal such as liposome-like vesicles in the water phase, and was dependent on the phosphatidylcholine contents in both the emulsions and the erythrocyte membrane. Moreover, sphingomyelin in the erythrocyte membrane was found to be an important component for stabilization of erythrocyte membranes against hemolysis induced by intravenous fat or lipid emulsions.
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Affiliation(s)
- Y Nagasaka
- Department of Pharmaceutical Sciences, Meiji Pharmaceutical University, 2-522-1 Noshio Kiyose, 204-8588, Tokyo, Japan
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García DA, Quiroga S, Perillo MA. Flunitrazepam partitioning into natural membranes increases surface curvature and alters cellular morphology. Chem Biol Interact 2000; 129:263-77. [PMID: 11137065 DOI: 10.1016/s0009-2797(00)00254-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
In recent studies, we showed that flunitrazepam (FNTZ) and other benzodiazepines interact with artificial phospholipid membranes locating at the polar head group region, inducing a membrane expansion, reducing the molecular packing and reorganising molecular dipoles. In the present paper we investigated the possibility that those phenomena could be transduced into changes in the curvature of membranes from natural origin. Hence we studied the effect of FNTZ on cellular morphology using human erythrocyte as a natural assay system. Shape changes of erythrocytes were evaluated by light microscopy and expressed as a morphological index (MI). FNTZ induced echinocytosis in a time-dependent manner with MI values significantly higher than those of control (without drug) or DMSO (vehicle) samples. Lidocaine, a local anesthetic known to induce stomatocytosis by incorporating in the inner monolayer, counterbalanced the concentration-dependent FNTZ crenating effects. FNTZ induced protective effects, compared with control and DMSO, against time-dependent hemolysis. Hypotonic-induced hemolysis, was also lowered by FNTZ in a concentration-dependent manner. Both antihemolytic effects suggested a drug-induced membrane expansion allowing a greater increase in cell volume before lysis. In such a complex system like a cell, curvature changes triggered by drug partitioning towards the plasma membrane, might be an indirect effect exerted through modifications of ionic-gradients or by affecting cytoskeleton-membrane linkage. In spite of that, the curvature changes can be interpreted as a mechanism suitable to relieve the tension generated initially by drug incorporation into the bilayer and may be the resultant of the dynamic interactions of many molecular fluxes leading to satisfy the spontaneous membrane curvature.
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Affiliation(s)
- D A García
- Cátedra de Química Biológica, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Av. Vélez Sarsfield 299, 5000, Córdoba, Argentina
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Wowk B, Darwin M, Harris SB, Russell SR, Rasch CM. Effects of solute methoxylation on glass-forming ability and stability of vitrification solutions. Cryobiology 1999; 39:215-27. [PMID: 10600255 DOI: 10.1006/cryo.1999.2203] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The effects of replacing hydroxyl groups with methoxyl (OCH(3)) groups in the polyols ethylene glycol (EG), propylene glycol (PG), glycerol, and threitol were studied by differential scanning calorimetry (DSC) during cooling of aqueous solutions to -150 degrees C and subsequent rewarming. For 35% (w/w) PG, 40% EG, and 45% glycerol, a single substitution of a terminal hydroxyl group with a methoxyl group reduced the critical cooling rate necessary to avoid ice on cooling (vitrify) from approximately 500 to 50 degrees C/min. This reduction was approximately equivalent to increasing the parent polyol concentration by 5% (w/w). The critical warming rate calculated to avoid formation of ice on rewarming (devitrification) was also reduced by methoxyl substitution, typically by a factor of 10(4) for dilute solutions. Double methoxylation (replacement of both terminal hydroxyls) tended to result in hydrate formation, making these compounds less interesting. An exception was threitol, for which substituting both terminal hydroxyls by methoxyls reduced the critical rewarming rate of a 50% solution by a factor of 10(7) without any hydrate formation. These glass-forming and stability properties of methoxylated compounds, combined with their low viscosity, enhanced permeability, and high glass transition temperatures, make them interesting candidate cryoprotective agents for cryopreservation by vitrification or freezing. Copyright 1999 Academic Press.
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Affiliation(s)
- B Wowk
- 21st Century Medicine, Inc., 10844 Edison Court, Rancho Cucamonga, California, 91730, USA
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Dumaswala UJ, Wilson MJ, José T, Daleke DL. Effect of a glycerol-containing hypotonic medium on erythrocyte phospholipid asymmetry and aminophospholipid transport during storage. BIOCHIMICA ET BIOPHYSICA ACTA 1997; 1330:265-73. [PMID: 9408180 DOI: 10.1016/s0005-2736(97)00157-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Previous studies from our laboratory have shown that under blood bank storage conditions red blood cell (RBC) ATP and lipid content were better maintained in a glycerol-containing hypotonic experimental additive solution (EAS 25) than in the conventional storage medium Adsol. The objective of this study was to determine the mechanism of the protective effect of EAS 25, by measuring transmembrane phospholipid asymmetry and the membrane integrity of stored RBCs. Split units of packed RBCs were stored in either EAS 25 or Adsol. RBCs were analyzed after 0, 42, and 84 days and vesicles shed from stored RBCs were analyzed after 84 days of storage. Phospholipid asymmetry was measured by phospholipase A2 digestion (RBCs) and activation of the prothrombinase complex (RBCs, vesicles). RBC membrane exhibited a significantly greater (P < 0.01) amount of phosphatidylethanolamine externalized after storage in Adsol than in EAS 25 (44.3% +/- 11.7 vs. 25.3% +/- 5.7, respectively). Prothrombin converting activities in RBCs were significantly lower than in shed vesicles (P < 0.001) suggesting the presence of phosphatidylserine in the outer monolayer of vesicle, but not in RBC membranes. The rates of inwardly-directed aminophospholipid transport in RBCs decreased by 50% and glutathione levels decreased by approximately 50% in both media. RBC cholesterol and phospholipid content of stored RBCs remained significantly greater (P < 0.01) in EAS 25 than in Adsol. The results indicate that despite comparable reduction in the rate of aminophospholipid transport and reduced GSH concentrations, RBC phospholipid asymmetry was better maintained during storage in EAS 25 than in Adsol. The data suggest that glycerol in the hypotonic EAS helps preserve RBC lipid organization and membrane integrity during storage.
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Affiliation(s)
- U J Dumaswala
- Research Department, Hoxworth Blood Center, University of Cincinnati Medical Center, OH 45267-0055, USA.
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