1
|
Kaźmierczak T, Męczarska K, Lachowicz-Wiśniewska S, Cyboran-Mikołajczyk S, Oszmiański J, Bonarska-Kujawa D. Protective Effect of Polyphenolic Extracts from Hippophae rhamnoides L. and Reynoutria japonica Houtt. on Erythrocyte Membrane. Molecules 2024; 29:3090. [PMID: 38999046 PMCID: PMC11243633 DOI: 10.3390/molecules29133090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2024] [Revised: 06/23/2024] [Accepted: 06/26/2024] [Indexed: 07/14/2024] Open
Abstract
Sea buckthorn and Japanese knotweed are known in many traditional medicine systems to be a great source of bioactive substances. This research aims to compare the bioactivity and protective effects of the phenolic extracts of leaves from sea buckthorn and roots and leaves from the Japanese knotweed on erythrocytes. The polyphenol composition of the extract was analyzed using UPLC-PDA-ESI-MS/MS. The extracts' toxicity and impact on the erythrocytes' osmotic fragility were measured spectrophotometrically. The antioxidant activity was determined based on the inhibition of oxidation of erythrocytes and their membrane induced by 2,2'-Azobis(2-methylpropionamidine) dihydrochloride (AAPH),measured spectrophotometrically and using fluorimetry. To find the possible mechanism of the extracts' action, extract-modified cells were observed under a microscope, and the potential localization of the extract's phytochemical composition was checked using fluorescent probes. The results showed that the used extracts are not toxic to erythrocytes, increase their osmotic resistance, and successfully protect them against free radicals. Extract components localize on the outer part of the membrane, where they can scavenge the free radicals from the environment. Altogether, the presented extracts can greatly protect living organisms against free radicals and can be used to support the treatment of diseases caused by excess free radicals.
Collapse
Affiliation(s)
- Teresa Kaźmierczak
- Department of Physics and Biophysics, The Faculty of Biotechnology and Food Sciences, Wrocław University of Environmental and Life Sciences, Norwida Str. 25, 50-375 Wrocław, Poland
| | - Katarzyna Męczarska
- Department of Physics and Biophysics, The Faculty of Biotechnology and Food Sciences, Wrocław University of Environmental and Life Sciences, Norwida Str. 25, 50-375 Wrocław, Poland
| | | | - Sylwia Cyboran-Mikołajczyk
- Department of Physics and Biophysics, The Faculty of Biotechnology and Food Sciences, Wrocław University of Environmental and Life Sciences, Norwida Str. 25, 50-375 Wrocław, Poland
| | - Jan Oszmiański
- Departament of Fruit, Vegetable and Plant Nutraceutical Technology, The Faculty of Biotechnology and Food Sciences, Wrocław University of Environmental and Life Sciences, Chełmońskiego Str. 37, 51-630 Wroclaw, Poland
| | - Dorota Bonarska-Kujawa
- Department of Physics and Biophysics, The Faculty of Biotechnology and Food Sciences, Wrocław University of Environmental and Life Sciences, Norwida Str. 25, 50-375 Wrocław, Poland
| |
Collapse
|
2
|
Min Q, Gao Y, Wang Y. Bioelectricity in dental medicine: a narrative review. Biomed Eng Online 2024; 23:3. [PMID: 38172866 PMCID: PMC10765628 DOI: 10.1186/s12938-023-01189-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 12/05/2023] [Indexed: 01/05/2024] Open
Abstract
BACKGROUND Bioelectric signals, whether exogenous or endogenous, play crucial roles in the life processes of organisms. Recently, the significance of bioelectricity in the field of dentistry is steadily gaining greater attention. OBJECTIVE This narrative review aims to comprehensively outline the theory, physiological effects, and practical applications of bioelectricity in dental medicine and to offer insights into its potential future direction. It attempts to provide dental clinicians and researchers with an electrophysiological perspective to enhance their clinical practice or fundamental research endeavors. METHODS An online computer search for relevant literature was performed in PubMed, Web of Science and Cochrane Library, with the keywords "bioelectricity, endogenous electric signal, electric stimulation, dental medicine." RESULTS Eventually, 288 documents were included for review. The variance in ion concentration between the interior and exterior of the cell membrane, referred to as transmembrane potential, forms the fundamental basis of bioelectricity. Transmembrane potential has been established as an essential regulator of intercellular communication, mechanotransduction, migration, proliferation, and immune responses. Thus, exogenous electric stimulation can significantly alter cellular action by affecting transmembrane potential. In the field of dental medicine, electric stimulation has proven useful for assessing pulp condition, locating root apices, improving the properties of dental biomaterials, expediting orthodontic tooth movement, facilitating implant osteointegration, addressing maxillofacial malignancies, and managing neuromuscular dysfunction. Furthermore, the reprogramming of bioelectric signals holds promise as a means to guide organism development and intervene in disease processes. Besides, the development of high-throughput electrophysiological tools will be imperative for identifying ion channel targets and precisely modulating bioelectricity in the future. CONCLUSIONS Bioelectricity has found application in various concepts of dental medicine but large-scale, standardized, randomized controlled clinical trials are still necessary in the future. In addition, the precise, repeatable and predictable measurement and modulation methods of bioelectric signal patterns are essential research direction.
Collapse
Affiliation(s)
- Qingqing Min
- Department of Endodontics, Wuxi Stomatology Hospital, Wuxi, 214000, China
| | - Yajun Gao
- Department of Endodontics, Wuxi Stomatology Hospital, Wuxi, 214000, China
| | - Yao Wang
- Department of Implantology, Wuxi Stomatology Hospital, Wuxi, 214000, China.
| |
Collapse
|
3
|
Sarkar P, Chattopadhyay A. Membrane Dipole Potential: An Emerging Approach to Explore Membrane Organization and Function. J Phys Chem B 2022; 126:4415-4430. [PMID: 35696090 DOI: 10.1021/acs.jpcb.2c02476] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Biological membranes are complex organized molecular assemblies of lipids and proteins that provide cells and membrane-bound intracellular organelles their individual identities by morphological compartmentalization. Membrane dipole potential originates from the electrostatic potential difference within the membrane due to the nonrandom arrangement (orientation) of amphiphile and solvent (water) dipoles at the membrane interface. In this Feature Article, we will focus on the measurement of dipole potential using electrochromic fluorescent probes and highlight interesting applications. In addition, we will focus on ratiometric fluorescence microscopic imaging technique to measure dipole potential in cellular membranes, a technique that can be used to address novel problems in cell biology which are otherwise difficult to address using available approaches. We envision that membrane dipole potential could turn out to be a convenient tool in exploring the complex interplay between membrane lipids and proteins and could provide novel insights in membrane organization and function.
Collapse
Affiliation(s)
- Parijat Sarkar
- CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India
| | | |
Collapse
|
4
|
Energy absorption of human red blood cells and conductivity of the cytoplasm influenced by temperature. Biophys Chem 2021; 273:106578. [PMID: 33774523 DOI: 10.1016/j.bpc.2021.106578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Revised: 03/09/2021] [Accepted: 03/12/2021] [Indexed: 11/22/2022]
Abstract
The energy absorbed into tissues is known as the specific energy absorption (SAR) which is dependent on conductivity of the tissue. We calculated cytoplasmic conductivity of human red blood cell (HRBC) using the intracellular ionic concentrations and the Debye-Hückel-Onsager relation. The overall concentration is determined by cell volume and cell water content. The calculated HRBC conductivity at 25 o C was σc,25 = 0.5566 ± 0.0146 S m-1, ±SE). It is exponentially related to temperature: Q10 ≈ 1.866. At 37 o C, the calculated SAR value is 1.6 W kg-1 using a linear temperature compensation of conductivity. However, if using a biologically realistic non-linear temperature compensated conductivity, the SAR is ≈ 2.62 ± 0.05 W kg-1. The relationship between SAR and temperature increase is not straightforward. Since there is a wide variance in cellular ionic and water perfusion rates more tissue-specific SAR limits which consider temperature-related factors would be valuable.
Collapse
|
5
|
Melzak KA, Spouge JL, Boecker C, Kirschhöfer F, Brenner-Weiss G, Bieback K. Hemolysis Pathways during Storage of Erythrocytes and Inter-Donor Variability in Erythrocyte Morphology. Transfus Med Hemother 2021; 48:39-47. [PMID: 33708051 DOI: 10.1159/000508711] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 05/03/2020] [Indexed: 01/10/2023] Open
Abstract
Background Red blood cells (RBCs) stored for transfusions can lyse over the course of the storage period. The lysis is traditionally assumed to occur via the formation of spiculated echinocyte forms, so that cells that appear smoother are assumed to have better storage quality. We investigate this hypothesis by comparing the morphological distribution to the hemolysis for samples from different donors. Methods Red cell concentrates were obtained from a regional blood bank quality control laboratory. Out of 636 units processed by the laboratory, we obtained 26 high hemolysis units and 24 low hemolysis units for assessment of RBC morphology. The association between the morphology and the hemolysis was tested with the Wilcoxon-Mann-Whitney U test. Results Samples with high stomatocyte counts (p = 0.0012) were associated with increased hemolysis, implying that cells can lyse via the formation of stomatocytes. Conclusion RBCs can lyse without significant echinocyte formation. Lower degrees of spiculation are not a good indicator of low hemolysis when RBCs from different donors are compared.
Collapse
Affiliation(s)
- Kathryn A Melzak
- Institute of Functional Interfaces, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - John L Spouge
- National Center for Biotechnology Information, National Institutes of Health USA, Bethesda, Maryland, USA
| | - Clemens Boecker
- Institute of Functional Interfaces, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - Frank Kirschhöfer
- Institute of Functional Interfaces, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - Gerald Brenner-Weiss
- Institute of Functional Interfaces, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - Karen Bieback
- Institute for Transfusion Medicine and Immunology, Flowcore Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| |
Collapse
|
6
|
Balach MM, Casale CH, Campetelli AN. Erythrocyte plasma membrane potential: past and current methods for its measurement. Biophys Rev 2019; 11:995-1005. [PMID: 31741171 DOI: 10.1007/s12551-019-00603-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 10/28/2019] [Indexed: 01/08/2023] Open
Abstract
The plasma membrane functions both as a natural insulator and a diffusion barrier to the movement of ions. A wide variety of proteins transport and pump ions to generate concentration gradients that result in voltage differences, while ion channels allow ions to move across the membrane down those gradients. Plasma membrane potential is the difference in voltage between the inside and the outside of a biological cell, and it ranges from ~- 3 to ~- 90 mV. Most of the most significant discoveries in this field have been made in excitable cells, such as nerve and muscle cells. Nevertheless, special attention has been paid to some events controlled by changes in membrane potential in non-excitable cells. The origins of several blood disorders, for instance, are related to disturbances at the level of plasma membrane in erythrocytes, the structurally simplest red blood cells. The high simplicity of erythrocytes, in particular, made them perfect candidates for the electrophysiological studies that laid the foundations for understanding the generation, maintenance, and roles of membrane potential. This article summarizes the methodologies that have been used during the past decades to determine Δψ in red blood cells, from seminal microelectrodes, through the use of nuclear magnetic resonance or lipophilic radioactive ions to quantify intra and extracellular ions, to continuously renewed fluorescent potentiometric dyes. We have attempted to highlight the advantages and disadvantages of each methodology, as well as to provide a description of the technical aspects involved.
Collapse
Affiliation(s)
- Melisa M Balach
- INBIAS-CONICET, Ruta Nacional 36, Km 601, Río Cuarto, Cordoba, Argentina.,Departamento de Biología Molecular, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional 36, Km 601, Río Cuarto, Cordoba, Argentina
| | - Cesar H Casale
- INBIAS-CONICET, Ruta Nacional 36, Km 601, Río Cuarto, Cordoba, Argentina.,Departamento de Biología Molecular, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional 36, Km 601, Río Cuarto, Cordoba, Argentina
| | - Alexis N Campetelli
- INBIAS-CONICET, Ruta Nacional 36, Km 601, Río Cuarto, Cordoba, Argentina. .,Departamento de Biología Molecular, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional 36, Km 601, Río Cuarto, Cordoba, Argentina.
| |
Collapse
|
7
|
Ichikawa J, Koshino I, Arashiki N, Nakamura F, Komori M. Changes in Erythrocyte Morphology at Initiation of Cardiopulmonary Bypass Without Blood Transfusion Were Not Associated With Less Deformability During Cardiac Surgery. J Cardiothorac Vasc Anesth 2019; 33:2960-2967. [DOI: 10.1053/j.jvca.2019.03.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Revised: 03/12/2019] [Accepted: 03/14/2019] [Indexed: 11/11/2022]
|
8
|
Geekiyanage NM, Balanant MA, Sauret E, Saha S, Flower R, Lim CT, Gu Y. A coarse-grained red blood cell membrane model to study stomatocyte-discocyte-echinocyte morphologies. PLoS One 2019; 14:e0215447. [PMID: 31002688 PMCID: PMC6474605 DOI: 10.1371/journal.pone.0215447] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 04/02/2019] [Indexed: 02/02/2023] Open
Abstract
An improved red blood cell (RBC) membrane model is developed based on the bilayer coupling model (BCM) to accurately predict the complete sequence of stomatocyte-discocyte-echinocyte (SDE) transformation of a RBC. The coarse-grained (CG)-RBC membrane model is proposed to predict the minimum energy configuration of the RBC from the competition between lipid-bilayer bending resistance and cytoskeletal shear resistance under given reference constraints. In addition to the conventional membrane surface area, cell volume and bilayer-leaflet-area-difference constraints, a new constraint: total-membrane-curvature is proposed in the model to better predict RBC shapes in agreement with experimental observations. A quantitative evaluation of several cellular measurements including length, thickness and shape factor, is performed for the first time, between CG-RBC model predicted and three-dimensional (3D) confocal microscopy imaging generated RBC shapes at equivalent reference constraints. The validated CG-RBC membrane model is then employed to investigate the effect of reduced cell volume and elastic length scale on SDE transformation, to evaluate the RBC deformability during SDE transformation, and to identify the most probable RBC cytoskeletal reference state. The CG-RBC membrane model can predict the SDE shape behaviour under diverse shape-transforming scenarios, in-vitro RBC storage, microvascular circulation and flow through microfluidic devices.
Collapse
Affiliation(s)
- Nadeeshani Maheshika Geekiyanage
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
| | - Marie Anne Balanant
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
- Research & Development, Australian Red Cross Blood Service, Brisbane, Queensland, Australia
| | - Emilie Sauret
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
| | - Suvash Saha
- University of Technology Sydney (UTS), Ultimo, New South Wales, Australia
| | - Robert Flower
- Research & Development, Australian Red Cross Blood Service, Brisbane, Queensland, Australia
| | - Chwee Teck Lim
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore, Singapore
- Biomedical Institute for Global Health Research and Technology, National University of Singapore, Singapore
- Mechanobiology Institute, National University of Singapore, Singapore
| | - YuanTong Gu
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
| |
Collapse
|
9
|
Urbina A, Godoy-Silva R, Hoyos M, Camacho M. Acute hydrodynamic damage induced by SPLITT fractionation and centrifugation in red blood cells. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1020:53-61. [DOI: 10.1016/j.jchromb.2016.03.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 03/03/2016] [Accepted: 03/19/2016] [Indexed: 01/23/2023]
|
10
|
Sarkar P, Chattopadhyay A. Micellar dipole potential is sensitive to sphere-to-rod transition. Chem Phys Lipids 2015; 195:34-8. [PMID: 26616562 DOI: 10.1016/j.chemphyslip.2015.11.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Revised: 11/16/2015] [Accepted: 11/17/2015] [Indexed: 12/31/2022]
Abstract
Structural transitions involving shape changes play an important role in cellular physiology. Charged micelles offer a convenient model system in which structural transitions can be suitably induced by increasing the ionic strength of the medium. In this paper, we have explored sphere-to-rod transition in charged micelles of SDS and CTAB by monitoring micellar dipole potential using the dual wavelength ratiometric approach utilizing the potential-sensitive membrane probe di-8-ANEPPS. Our results show that micellar dipole potential is sensitive to sphere-to-rod transition in charged micelles. Micellar dipole potential exhibited increase with increasing ionic strength (salt), irrespective of the nature of micellar charge, implying considerable dipolar reorganization underlying structural transitions. We interpret the increase in dipole potential due to sphere-to-rod transition because of an increase in the population of confined (nonrandom) dipoles induced by micellar organizational change. This is due to the fact that dipole potential arises due to the nonrandom arrangement of micellar dipoles and water molecules at the micelle interface. Our results constitute one of the first reports describing drastic dipolar reorganization due to micellar shape (and size) change. We envision that dipole potential measurements could provide novel insights into micellar processes that are associated with dipolar reorganization.
Collapse
Affiliation(s)
- Parijat Sarkar
- CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India
| | | |
Collapse
|
11
|
Structural modification of H histo-blood group antigen. BLOOD TRANSFUSION = TRASFUSIONE DEL SANGUE 2014; 13:143-9. [PMID: 25369604 DOI: 10.2450/2014.0033-14] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Accepted: 06/17/2014] [Indexed: 11/21/2022]
|
12
|
Omarova EO, Antonenko YN. Inhibition of oxidative hemolysis in erythrocytes by mitochondria-targeted antioxidants of SkQ series. BIOCHEMISTRY (MOSCOW) 2014; 79:139-45. [DOI: 10.1134/s0006297914020072] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
13
|
|
14
|
Moore T, Sorokulova I, Pustovyy O, Globa L, Pascoe D, Rudisill M, Vodyanoy V. Microscopic evaluation of vesicles shed by erythrocytes at elevated temperatures. Microsc Res Tech 2013; 76:1163-70. [DOI: 10.1002/jemt.22280] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2013] [Revised: 07/20/2013] [Accepted: 07/29/2013] [Indexed: 01/10/2023]
Affiliation(s)
| | - Iryna Sorokulova
- Department of Anatomy; Physiology, and Pharmacology; College of Veterinary Medicine, Auburn University; Auburn; Alabama; 36849
| | - Oleg Pustovyy
- Department of Anatomy; Physiology, and Pharmacology; College of Veterinary Medicine, Auburn University; Auburn; Alabama; 36849
| | - Ludmila Globa
- Department of Anatomy; Physiology, and Pharmacology; College of Veterinary Medicine, Auburn University; Auburn; Alabama; 36849
| | - David Pascoe
- School of Kinesiology; College of Education, Auburn University; Auburn; Alabama; 36849
| | - Mary Rudisill
- School of Kinesiology; College of Education, Auburn University; Auburn; Alabama; 36849
| | - Vitaly Vodyanoy
- Department of Anatomy; Physiology, and Pharmacology; College of Veterinary Medicine, Auburn University; Auburn; Alabama; 36849
| |
Collapse
|
15
|
NMR q-space analysis of canonical shapes of human erythrocytes: stomatocytes, discocytes, spherocytes and echinocytes. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2012; 42:3-16. [PMID: 22644501 DOI: 10.1007/s00249-012-0822-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Revised: 04/23/2012] [Accepted: 05/05/2012] [Indexed: 10/28/2022]
Abstract
q-Space plots obtained experimentally using pulsed field-gradient stimulated echo (PGSTE) nuclear magnetic resonance (NMR) spectroscopy from water diffusing in red blood cells (RBCs) of different canonical (distinct variant) morphologies have "signature" features. The experimental q-space plots from suspensions of stomatocytes, echinocytes and spherocytes generated chemically had no diffraction features; in contrast a sample of blood from a patient with hereditary spherocytosis showed diffraction minima. To understand the forms of q-space plots, mathematical/geometrical models of discocytes, stomatocytes, echinocytes and spherocytes were used as restricting boundaries in simulations of water diffusion with Monte Carlo random walks. These simulations indicated that diffusion-diffraction minima are expected for each of the cell shapes considered. The absence of diffusion-diffraction minima in stomatocytes generated by dithiothreitol treatment was surmised to be due to non-alignment of the cells with the magnetic field of the NMR spectrometer. Differential interference contrast microscopy images of the chemically generated spherocyte and echinocyte suspensions showed them to be heterogeneous in cell shape. Therefore, we concluded that the shape heterogeneity caused the loss of the diffusion-diffraction features, which were observed in the more homogeneous sample from a patient with hereditary spherocytosis, and in the simulations of homogeneous cell suspensions. This understanding of factors that affect q-space plots from RBC suspensions will assist morphological studies of other cell and tissue types.
Collapse
|
16
|
Chaudhuri A, Haldar S, Chattopadhyay A. Structural transition in micelles: novel insight into microenvironmental changes in polarity and dynamics. Chem Phys Lipids 2012; 165:497-504. [DOI: 10.1016/j.chemphyslip.2011.09.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Revised: 09/15/2011] [Accepted: 09/16/2011] [Indexed: 01/23/2023]
|
17
|
Nogueira DR, Mitjans M, Infante MR, Vinardell MP. The role of counterions in the membrane-disruptive properties of pH-sensitive lysine-based surfactants. Acta Biomater 2011; 7:2846-56. [PMID: 21421083 DOI: 10.1016/j.actbio.2011.03.017] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2010] [Revised: 02/04/2011] [Accepted: 03/15/2011] [Indexed: 12/29/2022]
Abstract
Surfactants are among the most versatile and widely used excipients in pharmaceuticals. This versatility, together with their pH-responsive membrane-disruptive activity and low toxicity, could also enable their potential application in drug delivery systems. Five anionic lysine-based surfactants which differ in the nature of their counterion were studied. Their capacity to disrupt the cell membrane was examined under a range of pH values, concentrations and incubation times, using a standard hemolysis assay as a model for endosomal membranes. The surfactants showed pH-sensitive hemolytic activity and improved kinetics at the endosomal pH range. Low concentrations resulted in negligible hemolysis at physiological pH and high membrane lytic activity at pH 5.4, which is in the range characteristic of late endosomes. With increasing concentration, the surfactants showed an enhanced capacity to lyse cell membranes, and also caused significant membrane disruption at physiological pH. This observation indicates that, at high concentrations, surfactant behavior is independent of pH. The mechanism of surfactant-mediated membrane destabilization was addressed, and scanning electron microscopy studies were also performed to evaluate the effects of the compounds on erythrocyte morphology as a function of pH. The in vitro cytotoxicity of the surfactants was assessed by MTT and NRU assays with the 3T3 cell line. The influence of different types of counterion on hemolytic activity and the potential applications of these surfactants in drug delivery are discussed. The possibility of using pH-sensitive surfactants for endosome disruption could hold great promise for intracellular drug delivery systems in future therapeutic applications.
Collapse
Affiliation(s)
- D R Nogueira
- Departament de Fisiologia, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII s/n, E-08028 Barcelona, Spain
| | | | | | | |
Collapse
|
18
|
Erythrocyte morphological states, phases, transitions and trajectories. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2010; 1798:1767-78. [DOI: 10.1016/j.bbamem.2010.05.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2010] [Revised: 04/19/2010] [Accepted: 05/07/2010] [Indexed: 11/20/2022]
|
19
|
Chaudhuri A, Haldar S, Chattopadhyay A. Organization and dynamics in micellar structural transition monitored by pyrene fluorescence. Biochem Biophys Res Commun 2009; 390:728-32. [DOI: 10.1016/j.bbrc.2009.10.037] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2009] [Accepted: 10/08/2009] [Indexed: 11/28/2022]
|
20
|
Low concentration of extracellular hemoglobin affects shape of RBC in low ion strength sucrose solution. Bioelectrochemistry 2009; 75:19-25. [DOI: 10.1016/j.bioelechem.2008.12.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2008] [Revised: 12/19/2008] [Accepted: 12/29/2008] [Indexed: 11/21/2022]
|
21
|
Dubovskii PV, Volynsky PE, Polyansky AA, Karpunin DV, Chupin VV, Efremov RG, Arseniev AS. Three-dimensional structure/hydrophobicity of latarcins specifies their mode of membrane activity. Biochemistry 2008; 47:3525-33. [PMID: 18293934 DOI: 10.1021/bi702203w] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Latarcins, linear peptides from the Lachesana tarabaevi spider venom, exhibit a broad-spectrum antimicrobial activity, likely acting on the bacterial cytoplasmic membrane. We study their spatial structures and interaction with model membranes by a combination of experimental and theoretical methods to reveal the structure-activity relationship. In this work, a 26 amino acid peptide, Ltc1, was investigated. Its spatial structure in detergent micelles was determined by (1)H nuclear magnetic resonance (NMR) and refined by Monte Carlo simulations in an implicit water-octanol slab. The Ltc1 molecule was found to form a straight uninterrupted amphiphilic helix comprising 8-23 residues. A dye-leakage fluorescent assay and (31)P NMR spectroscopy established that the peptide does not induce the release of fluorescent marker nor deteriorate the bilayer structure of the membranes. The voltage-clamp technique showed that Ltc1 induces the current fluctuations through planar membranes when the sign of the applied potential coincides with the one across the bacterial inner membrane. This implies that Ltc1 acts on the membranes via a specific mechanism, which is different from the carpet mode demonstrated by another latarcin, Ltc2a, featuring a helix-hinge-helix structure with a hydrophobicity gradient along the peptide chain. In contrast, the hydrophobic surface of the Ltc1 helix is narrow-shaped and extends with no gradient along the axis. We have also disclosed a number of peptides, structurally homologous to Ltc1 and exhibiting similar membrane activity. This indicates that the hydrophobic pattern of the Ltc1 helix and related antimicrobial peptides specifies their activity mechanism. The latter assumes the formation of variable-sized lesions, which depend upon the potential across the membrane.
Collapse
Affiliation(s)
- Peter V Dubovskii
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, 16/10 Miklukho-Maklaya Str., Moscow 117997, Russia.
| | | | | | | | | | | | | |
Collapse
|
22
|
Arora-Sharawat A, Chattopadhyay A. Effect of structural transition of the host assembly on dynamics of a membrane-bound tryptophan analogue. Biophys Chem 2007; 129:172-80. [PMID: 17590497 DOI: 10.1016/j.bpc.2007.05.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2007] [Revised: 05/25/2007] [Accepted: 05/28/2007] [Indexed: 11/19/2022]
Abstract
Tryptophan octyl ester (TOE) represents an important model for membrane-bound tryptophan residues. In this article, we have explored the effect of sphere-to-rod transition of sodium dodecyl sulfate micelles on the dynamics of the membrane-bound tryptophan analogue, TOE, utilizing a combination of fluorescence spectroscopic approaches which include red edge excitation shift (REES). Our results show that REES and fluorescence spectroscopic parameters such as lifetime, anisotropy and acrylamide quenching of micelle-bound TOE are sensitive to the change in micellar organization accompanied by the sphere-to-rod transition.
Collapse
|
23
|
Betz T, Bakowsky U, Müller MR, Lehr CM, Bernhardt I. Conformational change of membrane proteins leads to shape changes of red blood cells. Bioelectrochemistry 2007; 70:122-6. [PMID: 16713378 DOI: 10.1016/j.bioelechem.2006.03.019] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2005] [Indexed: 11/26/2022]
Abstract
High-resolution atomic force microscopy (AFM) allows a new insight into the surface of mammalian cells. Using the human red blood cell (RBC) as a model, we have demonstrated an important correlation between the conformation of membrane proteins measured from the external face of the cell and the cell shape.
Collapse
Affiliation(s)
- Thomas Betz
- Laboratory of Biophysics, Saarland University, P.O. Box 151150, 66041 Saarbrücken, Germany
| | | | | | | | | |
Collapse
|
24
|
Muñoz San Martín S, Sebastián JL, Sancho M, Alvarez G. Modeling normal and altered human erythrocyte shapes by a new parametric equation: Application to the calculation of induced transmembrane potentials. Bioelectromagnetics 2006; 27:521-7. [PMID: 16715527 DOI: 10.1002/bem.20234] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
We present simple parametric equations in terms of Jacobi elliptic functions that provide a realistic model of abnormal variations in size which maintain the biconcave shape of a normal erythrocyte (anisocytosis) and abnormal variations in shape which maintain the original volume of the erythrocyte (poikilocytosis), as well as continuous deformations from the normal to the altered shapes. We illustrate our results with parameterizations of microcytes, macrocytes, and stomatocytes, and we apply these parameterizations to the numerical calculation of the induced transmembrane voltage in microcytes, macrocytes, and stomatocytes exposed to an external electromagnetic field of 1800 MHz.
Collapse
Affiliation(s)
- S Muñoz San Martín
- Departamento de Física Aplicada III, Facultad de Ciencias Físicas, Universidad Complutense, Madrid, Spain.
| | | | | | | |
Collapse
|
25
|
Rawat SS, Kelkar DA, Chattopadhyay A. Effect of structural transition of the host assembly on dynamics of an ion channel peptide: a fluorescence approach. Biophys J 2005; 89:3049-58. [PMID: 16100280 PMCID: PMC1366802 DOI: 10.1529/biophysj.105.060798] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Structural transition can be induced in charged micelles by increasing the ionic strength of the medium. We have monitored the organization and dynamics of the functionally important tryptophan residues of gramicidin in spherical and rod-shaped sodium dodecyl sulfate micelles utilizing a combination of wavelength-selective fluorescence and related fluorescence approaches. Our results show that tryptophans in gramicidin, present in the single-stranded beta(6.3) conformation, experience slow solvent relaxation giving rise to red edge excitation shift in spherical and rod-shaped micelles. In addition, changes in fluorescence polarization with increasing excitation or emission wavelength reinforce that the gramicidin tryptophans are localized in motionally restricted regions of these micelles. Fluorescence quenching experiments using acrylamide as a quencher of tryptophan fluorescence show that there is reduced water penetration in rod-shaped micelles. Taken together, we show that gramicidin conformation and dynamics is sensitive to the salt-induced structural transition in charged micelles. In addition, these results demonstrate that deformation of the host assembly could modulate protein conformation and dynamics.
Collapse
Affiliation(s)
- Satinder S Rawat
- Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India
| | | | | |
Collapse
|
26
|
Muñoz S, Sebastián JL, Sancho M, Miranda JM. Transmembrane voltage induced on altered erythrocyte shapes exposed to RF fields. Bioelectromagnetics 2004; 25:631-3. [PMID: 15515030 DOI: 10.1002/bem.20065] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
In this article, the transmembrane voltage induced on erythrocyte, codocyte, ovalocyte and spherocyte cell models exposed to a linearly polarised electromagnetic plane wave of frequency 1800 MHz is calculated. For this purpose, a finite element (FE) numerical technique with adaptive meshing is used. The results show that the value of the induced voltage on the original erythrocyte shape is higher than the one observed on the rest of the altered cell geometries studied. The erythrocyte shape and the membrane electric permittivity are shown to play a fundamental role on the values of the induced transmembrane voltage.
Collapse
Affiliation(s)
- S Muñoz
- Departamento de Fíisica Aplicada III, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, Madrid, Spain.
| | | | | | | |
Collapse
|
27
|
Tachev KD, Danov KD, Kralchevsky PA. On the mechanism of stomatocyte–echinocyte transformations of red blood cells: experiment and theoretical model. Colloids Surf B Biointerfaces 2004; 34:123-40. [PMID: 15261082 DOI: 10.1016/j.colsurfb.2003.12.011] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2003] [Indexed: 10/26/2022]
Abstract
This study represents an attempt to achieve a better understanding of the stomatocyte-echinocyte transition in the shape of red blood cells. We determined experimentally the index of cell shape at various ionic strengths and osmolarities for native and trypsin-treated human erythrocytes. For every given composition of the outer phase, we calculated the ionic strength in the cells and the transmembrane electric potential using a known theoretical model. Next, we described theoretically the electric double layers formed on both sides of the cell membrane, and derived expressions for the tensions of the two membrane leaflets. Taking into account that the cell-shape index depends on the tension difference between the two leaflets, we fitted the experimental data with the constructed physicochemical model. The model, which agrees well with the experiment, indicates that the tension difference between the two leaflets is governed by the different adsorptions of counterions at the two membrane surfaces, rather than by the direct contribution of the electric double layers to the membrane tension. Thus, with the rise of the ionic strength, the counterion adsorption increases stronger at the outer leaflet, whose stretching surface pressure becomes greater, and whose area expands relative to that of the inner leaflet. Hence, there is no contradiction between the bilayer-couple hypothesis and the electric double layer theory, if the latter is upgraded to account for the effect of counterion-adsorption on the membrane tension. The developed quantitative model can be applied to predict the shape index of cells upon a stomatocyte-discocyte-echinocyte transformation at varying composition of the outer medium.
Collapse
Affiliation(s)
- K D Tachev
- Department of Functional Biology, Faculty of Natural Sciences, University of Shumen, 9712 Shumen, Bulgaria
| | | | | |
Collapse
|
28
|
Mukhopadhyay R, Lim H W G, Wortis M. Echinocyte shapes: bending, stretching, and shear determine spicule shape and spacing. Biophys J 2002; 82:1756-72. [PMID: 11916836 PMCID: PMC1301974 DOI: 10.1016/s0006-3495(02)75527-6] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
We study the shapes of human red blood cells using continuum mechanics. In particular, we model the crenated, echinocytic shapes and show how they may arise from a competition between the bending energy of the plasma membrane and the stretching/shear elastic energies of the membrane skeleton. In contrast to earlier work, we calculate spicule shapes exactly by solving the equations of continuum mechanics subject to appropriate boundary conditions. A simple scaling analysis of this competition reveals an elastic length Lambda(el), which sets the length scale for the spicules and is, thus, related to the number of spicules experimentally observed on the fully developed echinocyte.
Collapse
Affiliation(s)
- Ranjan Mukhopadhyay
- Department of Physics, Simon Fraser University Burnaby, British Columbia, V5A 1S6 Canada.
| | | | | |
Collapse
|
29
|
Abstract
Two ideas explain the mechanism of shape regulation: the lipid bilayer coupled theory and the protein network scaffold theory. Recently, several important articles have been published on the former theory. However, many phenomena argue against the theory, including behavior of ghosts and triton shells, various types of manipulation of proteins, and fixation of the shape by the addition of large reagents outside the cell. Moreover, hereditary spherocytosis shows normal, uneven distribution of phospholipids, and hereditary and artificial defects of a membrane protein show spherocytes or elliptocytes. The liquid state of the lipid layer does not seem to support the shape or mechanical characteristics. On the other hand, all of these phenomena argue for the protein network scaffold theory. Characteristics of each protein and interactions among proteins are now being clarified, but this theory and the author's own ideas still lack decisive evidence.
Collapse
Affiliation(s)
- Makoto Nakao
- Professor Emeritus, Tokyo Medical and Dental University, School of Medicine, Tokyo, Japan.
| |
Collapse
|
30
|
Chang SH, Low PS. Regulation of the glycophorin C-protein 4.1 membrane-to-skeleton bridge and evaluation of its contribution to erythrocyte membrane stability. J Biol Chem 2001; 276:22223-30. [PMID: 11294862 DOI: 10.1074/jbc.m100604200] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The band 3-ankyrin-spectrin bridge and the glycophorin C-protein 4.1-spectrin/actin bridge constitute the two major tethers between the erythrocyte membrane and its spectrin skeleton. Although a structural requirement for the band 3-ankyrin bridge is well established, the contribution of the glycophorin C-protein 4.1 bridge to red cell function remains to be defined. In order to explore this latter bridge further, we have identified and/or characterized five stimuli that sever the linkage in intact erythrocytes and have examined the impact of this rupture on membrane mechanical properties. We report here that elevation of cytosolic 2,3-bisphosphoglycerate, an increase in intracellular Ca(2+), removal of cell O(2), a decrease in intracellular pH, and activation of erythrocyte protein kinase C all promote dissociation of protein 4.1 from glycophorin C, leading to reduced retention of glycophorin C in detergent-extracted spectrin/actin skeletons. Significantly, where mechanical studies could be performed, we also observe that rupture of the membrane-to-skeleton bridge has little or no impact on the mechanical properties of the cell, as assayed by ektacytometry and nickel mesh filtration. We, therefore, suggest that, although regulation of the glycophorin C-protein 4.1-spectrin/actin bridge likely occurs physiologically, the role of the tether and the associated regulatory changes remain to be established.
Collapse
Affiliation(s)
- S H Chang
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, USA
| | | |
Collapse
|
31
|
Gedde MM, Yang E, Huestis WH. Resolution of the paradox of red cell shape changes in low and high pH. BIOCHIMICA ET BIOPHYSICA ACTA 1999; 1417:246-53. [PMID: 10082800 DOI: 10.1016/s0005-2736(99)00007-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The molecular basis of cell shape regulation in acidic pH was investigated in human erythrocytes. Intact erythrocytes maintain normal shape in the cell pH range 6.3-7.9, but invaginate at lower pH values. However, consistent with predicted pH-dependent changes in the erythrocyte membrane skeleton, isolated erythrocyte membranes evaginate in acidic pH. Moreover, intact cells evaginate at pH greater than 7.9, but isolated membranes invaginate in this condition. Labeling with the hydrophobic, photoactivatable probe 5-[125I]iodonaphthyl-1-azide demonstrated pH-dependent hydrophobic insertion of an amphitropic protein into membranes of intact cells but not into isolated membranes. Based on molecular weight and on reconstitution experiments using stripped inside-out vesicles, the most likely candidate for the variably labeled protein is glyceraldehyde-3-phosphate dehydrogenase. Resealing of isolated membranes reconstituted both the shape changes and the hydrophobic labeling profile seen in intact cells. This observation appears to resolve the paradox of the contradictory pH dependence of shape changes of intact cells and isolated membranes. In intact erythrocytes, the demonstrated protein-membrane interaction would oppose pH-dependent shape effects of the spectrin membrane skeleton, stabilizing cell shape in moderately abnormal pH. Stabilization of erythrocyte shape in moderately acidic pH may prevent inappropriate red cell destruction in the spleen.
Collapse
Affiliation(s)
- M M Gedde
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA.
| | | | | |
Collapse
|
32
|
Glaser R. Does the transmembrane potential (Deltapsi) or the intracellular pH (pHi) control the shape of human erythrocytes? Biophys J 1998; 75:569-70. [PMID: 9649420 PMCID: PMC1299732 DOI: 10.1016/s0006-3495(98)77547-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
|
33
|
|