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Yastrebova ES, Nekrasov VM, Gilev KV, Gisich AV, Abubakirova OA, Strokotov DI, Chernyshev AV, Karpenko AA, Maltsev VP. Erythrocyte lysis and angle-resolved light scattering measured by scanning flow cytometry result to 48 indices quantifying a gas exchange function of the human organism. Cytometry A 2023; 103:39-53. [PMID: 35349217 DOI: 10.1002/cyto.a.24554] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 03/21/2022] [Accepted: 03/25/2022] [Indexed: 01/20/2023]
Abstract
Molecular/cell level of gas exchange function assumes the accurate measurement of erythrocyte characteristics and rate constants concerning to molecules involved into the CO2 /O2 transport. Unfortunately, common hematology analyzers provide the measurement of eight indices of erythrocytes only and say little about erythrocyte morphology and nothing about rate constants of cellular function. The aim of this study is to demonstrate the ability of the Scanning Flow Cytometer (SFC) in the complete morphological analysis of mature erythrocytes and characterization of erythrocyte function via measurement of lysing kinetics. With this study we are introducing 48 erythrocyte indices. To provide the usability of application of the SFC in clinical diagnosis, we formed four categories of indices which are as follows: content/concentration (9 indices), morphology (26 indices), age (5 indices), and function (8 indices). The erythrocytes of 39 healthy volunteers were analyzed with the SFC to fix the first-ever reference intervals for the new indices introduced. The essential measurable reliability of the presented method is expressed in terms of errors of characteristics of single erythrocytes retrieved from the solution of the inverse light-scattering problem and errors of parameters retrieved from the fitting of the experimental kinetics by molecular-kinetics model of erythrocyte lysis.
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Affiliation(s)
- Ekaterina S Yastrebova
- Cytometry and Biokinetics, Voevodsky Institute of Chemical Kinetics and Combustion, Novosibirsk, Russian Federation
| | - Vyacheslav M Nekrasov
- Cytometry and Biokinetics, Voevodsky Institute of Chemical Kinetics and Combustion, Novosibirsk, Russian Federation
| | - Konstantin V Gilev
- Cytometry and Biokinetics, Voevodsky Institute of Chemical Kinetics and Combustion, Novosibirsk, Russian Federation
| | - Alla V Gisich
- Cytometry and Biokinetics, Voevodsky Institute of Chemical Kinetics and Combustion, Novosibirsk, Russian Federation
| | - Olga A Abubakirova
- Department of Vascular and Hybrid Surgery, State Research Institute of Circulation Pathology, Novosibirsk, Russian Federation
| | - Dmitry I Strokotov
- Cytometry and Biokinetics, Voevodsky Institute of Chemical Kinetics and Combustion, Novosibirsk, Russian Federation
| | - Andrey V Chernyshev
- Cytometry and Biokinetics, Voevodsky Institute of Chemical Kinetics and Combustion, Novosibirsk, Russian Federation
| | - Andrey A Karpenko
- Department of Vascular and Hybrid Surgery, State Research Institute of Circulation Pathology, Novosibirsk, Russian Federation
| | - Valeri P Maltsev
- Cytometry and Biokinetics, Voevodsky Institute of Chemical Kinetics and Combustion, Novosibirsk, Russian Federation.,Physical department, Novosibirsk State University, Novosibirsk, Russian Federation
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Benefits of the consumption of Brazil nut ( Bertholletia excelsa) extract in male reproductive parameters of streptozotocin-induced diabetic rats. J Diabetes Metab Disord 2020; 19:187-196. [PMID: 32550168 DOI: 10.1007/s40200-020-00490-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Accepted: 01/05/2020] [Indexed: 12/20/2022]
Abstract
Objective The objective of this study was to evaluate the effects of intake of Brazil nut extract (BN) or sodium selenite solution on reproductive parameters of male diabetic animals. Methods A total of 48 Wistar rats were distributed into six groups: diabetes (n = 8); diabetes and Brazil nut extract (n = 8); diabetes and sodium selenite (Na2SeO3) (n = 8); Brazil nut extract (n = 8); sodium selenite (n = 8) and control (n = 8). A single dose of streptozotocin (65 mg/kg) was injected intravenously to the rats to induce diabetes. BN or Na2SeO3 were administered by gavage for 56 days. Results The diabetes caused critical alterations on body mass gain, reproductive parameters and antioxidant capacity. Treatments with both BN or Na2SeO3 were able to increase significantly the glutathione peroxidase and the daily sperm production, both in diabetic (p < 0.01 and p < 0.05) and in healthy animals (p < 0.01 and p < 0.05). Conclusion The Brazil nut extract and sodium selenite were able to improve some reproductive parameters of diabetic rats. Moreover, we could infer that this effect is probably due to the natural selenium content of the BN.
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Remigante A, Morabito R, Marino A. Natural Antioxidants Beneficial Effects on Anion Exchange through Band 3 Protein in Human Erythrocytes. Antioxidants (Basel) 2019; 9:antiox9010025. [PMID: 31888111 PMCID: PMC7022719 DOI: 10.3390/antiox9010025] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 12/23/2019] [Accepted: 12/24/2019] [Indexed: 01/06/2023] Open
Abstract
Band 3 protein (B3p) exchanging Cl− and HCO3− through erythrocyte membranes is responsible for acid balance, ion distribution and gas exchange, thus accounting for homeostasis of both erythrocytes and entire organisms. Moreover, since B3p cross links with the cytoskeleton and the proteins underlying the erythrocyte membrane, its function also impacts cell shape and deformability, essential to adaptation of erythrocyte size to capillaries for pulmonary circulation. As growing attention has been directed toward this protein in recent years, the present review was conceived to report the most recent knowledge regarding B3p, with specific regard to its anion exchange capability under in vitro oxidative conditions. Most importantly, the role of natural antioxidants, i.e., curcumin, melatonin and Mg2+, in preventing detrimental oxidant effects on B3p is considered.
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Yastrebova ES, Konokhova AI, Strokotov DI, Karpenko AA, Maltsev VP, Chernyshev AV. Proposed Dynamics of CDB3 Activation in Human Erythrocytes by Nifedipine Studied with Scanning Flow Cytometry. Cytometry A 2019; 95:1275-1284. [PMID: 31750613 DOI: 10.1002/cyto.a.23918] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 09/25/2019] [Accepted: 10/01/2019] [Indexed: 12/16/2022]
Abstract
Nifedipine is calcium channels and pumps blocker widely used in medicine. However, mechanisms of nifedipine action in blood are not clear. In particular, the influence of nifedipine on erythrocytes is far from completely understood. In this work, applying scanning flow cytometry, we observed experimentally for the first time the dynamics behind a significant increase of HCO3 - /Cl- transmembrane exchange rate of CDB3 (main anion exchanger, AE1, Band 3, SLC4A1) of human erythrocytes in the presence of nifedipine in blood. It was found that the rate of CDB3 activation is not limited by the rate of nifedipine binding and/or Ca2+ transport. In order to explain the experimental data, we suggested a kinetic model assuming that the rate of CDB3 activation is limited by the dynamics of the balance between two intracellular processes (1) the activation of CDB3 limited by its interaction with intracellular Ca2+ , and (2) the spontaneous deactivation of CDB3. Thus the use of scanning flow cytometry allowed to clarify quantitatively the molecular kinetic mechanism of nifedipine action on human erythrocytes. In particular, the efficiency (~30) and rates of activation (~0.3 min-1 ) and deactivation (~10-3 min-1 ) of CDB3 in human erythrocytes was evaluated for two donors. © 2019 International Society for Advancement of Cytometry.
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Affiliation(s)
- Ekaterina S Yastrebova
- Voevodsky Institute of Chemical Kinetics and Combustion, Institutskaya 3, Novosibirsk, 630090, Russia.,Novosibirsk State University, Pirogova 2, Novosibirsk, 630090, Russia.,Meshalkin National Medical Research Center, Ministry of Health of Russian Federation, Rechkunovskaya 15, 630055, Novosibirsk, Russia
| | - Anastasiya I Konokhova
- Voevodsky Institute of Chemical Kinetics and Combustion, Institutskaya 3, Novosibirsk, 630090, Russia.,Meshalkin National Medical Research Center, Ministry of Health of Russian Federation, Rechkunovskaya 15, 630055, Novosibirsk, Russia
| | - Dmitry I Strokotov
- Voevodsky Institute of Chemical Kinetics and Combustion, Institutskaya 3, Novosibirsk, 630090, Russia.,Novosibirsk State Medical University, Krasny Prospect 52, Novosibirsk, 630091, Russia
| | - Andrei A Karpenko
- Meshalkin National Medical Research Center, Ministry of Health of Russian Federation, Rechkunovskaya 15, 630055, Novosibirsk, Russia
| | - Valeri P Maltsev
- Voevodsky Institute of Chemical Kinetics and Combustion, Institutskaya 3, Novosibirsk, 630090, Russia.,Novosibirsk State University, Pirogova 2, Novosibirsk, 630090, Russia.,Novosibirsk State Medical University, Krasny Prospect 52, Novosibirsk, 630091, Russia
| | - Andrei V Chernyshev
- Voevodsky Institute of Chemical Kinetics and Combustion, Institutskaya 3, Novosibirsk, 630090, Russia.,Novosibirsk State University, Pirogova 2, Novosibirsk, 630090, Russia
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The crystal structure of the regulatory domain of the human sodium-driven chloride/bicarbonate exchanger. Sci Rep 2017; 7:12131. [PMID: 28935959 PMCID: PMC5608694 DOI: 10.1038/s41598-017-12409-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 09/06/2017] [Indexed: 12/12/2022] Open
Abstract
The sodium-driven chloride/bicarbonate exchanger (NDCBE) is essential for maintaining homeostatic pH in neurons. The crystal structure at 2.8 Å resolution of the regulatory N-terminal domain of human NDCBE represents the first crystal structure of an electroneutral sodium-bicarbonate cotransporter. The crystal structure forms an equivalent dimeric interface as observed for the cytoplasmic domain of Band 3, and thus establishes that the consensus motif VTVLP is the key minimal dimerization motif. The VTVLP motif is highly conserved and likely to be the physiologically relevant interface for all other members of the SLC4 family. A novel conserved Zn2+-binding motif present in the N-terminal domain of NDCBE is identified and characterized in vitro. Cellular studies confirm the Zn2+ dependent transport of two electroneutral bicarbonate transporters, NCBE and NBCn1. The Zn2+ site is mapped to a cluster of histidines close to the conserved ETARWLKFEE motif and likely plays a role in the regulation of this important motif. The combined structural and bioinformatics analysis provides a model that predicts with additional confidence the physiologically relevant interface between the cytoplasmic domain and the transmembrane domain.
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