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Yoshida T, Sakura T, Shimizu K, Kimura S, Iwasaki T, Kanazawa T, Morimatsu H. Carboxyhemoglobin and Methemoglobin Levels and Hemolysis in Children Undergoing Cardiac Surgery With Cardiopulmonary Bypass. ASAIO J 2023; 69:1099-1105. [PMID: 37788481 DOI: 10.1097/mat.0000000000002044] [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: 10/05/2023] Open
Abstract
Hemolysis is a complication of cardiopulmonary bypass (CPB). Carboxyhemoglobin (COHb) and methemoglobin (MetHb) were suggested as potential hemolysis biomarkers. This retrospective study was based on a prospective registry aimed to determine the association of COHb and MetHb levels with hemolysis in pediatric patients <4 years old who underwent cardiac surgery with CPB. Plasma-free hemoglobin (PFH), COHb, and MetHb levels were measured before CPB; every 30 minutes during CPB; and on postoperative days 1, 2, and 3. Patients were classified into hemolysis and nonhemolysis groups based on the maximum PFH levels during CPB. A total of 193 patients were included. No significant difference was observed in the maximum COHb levels during CPB (COHb CPB ) between the hemolysis and nonhemolysis groups (1.2% [interquartile range {IQR} 0.9-1.4%] vs. 1.1% [IQR: 0.9-1.4%]; p = 0.17). The maximum MetHb levels during CPB (MetHb CPB ) were significantly higher in the hemolysis group than in the nonhemolysis group (1.3% [IQR: 1.1-1.5%] vs. 1.2% [IQR: 1.0-1.4%]; p = 0.007). Areas under the receiver operating curves of COHb CPB and MetHb CPB were 0.557 (95% confidence interval: 0.475-0.640) and 0.615 (95% confidence interval: 0.535-0.695), respectively. Therefore, the predictive ability of both hemolysis biomarkers during CPB is limited.
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Affiliation(s)
- Tsubasa Yoshida
- From the Department of Anesthesiology and Resuscitology, Okayama University Hospital, Okayama, Japan
- Department of Anesthesiology and Resuscitology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Takanobu Sakura
- From the Department of Anesthesiology and Resuscitology, Okayama University Hospital, Okayama, Japan
| | - Kazuyoshi Shimizu
- From the Department of Anesthesiology and Resuscitology, Okayama University Hospital, Okayama, Japan
| | - Satoshi Kimura
- From the Department of Anesthesiology and Resuscitology, Okayama University Hospital, Okayama, Japan
| | - Tatsuo Iwasaki
- From the Department of Anesthesiology and Resuscitology, Okayama University Hospital, Okayama, Japan
| | - Tomoyuki Kanazawa
- From the Department of Anesthesiology and Resuscitology, Okayama University Hospital, Okayama, Japan
| | - Hiroshi Morimatsu
- From the Department of Anesthesiology and Resuscitology, Okayama University Hospital, Okayama, Japan
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Banerjee A, Dey T, Majumder R, Bhattacharya T, Dey S, Bandyopadhyay D, Chattopadhyay A. Oleic acid prevents erythrocyte death by preserving haemoglobin and erythrocyte membrane proteins. Free Radic Biol Med 2023; 202:17-33. [PMID: 36965537 DOI: 10.1016/j.freeradbiomed.2023.03.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 03/11/2023] [Accepted: 03/20/2023] [Indexed: 03/27/2023]
Abstract
Haemolysis of erythrocytes upon exposure to haemato-toxic phenylhydrazine (PHZ), makes it an experimental model of anaemia and a partial model of β-thalassaemia, where oxidative stress (OS) was identified as principal causative factor. Oleic acid (OA) was evidenced to ameliorate such stress with antioxidative potential. Erythrocytes were incubated in vitro using 1 mM PHZ, 0.06 nM OA. Erythrocyte membrane protein densities and haemoglobin (Hb) status were examined. Any interaction of Hb with PHZ/OA was checked by calorimetric and spectroscopic analysis using pure molecules. Occurrence of erythrocyte apoptosis and involvement of free iron in all groups were evaluated. PHZ exposure to erythrocytes results in OS with subsequent apoptosis as evidenced from increased lipid peroxidation and translocation of phosphatidylserine in outer membrane. Preservations of erythrocyte cytoskeletal architecture and membrane bound enzyme activity were found in presence of OA. Moreover, both heme and globin of Hb was examined to be conserved by OA. Presence of OA, impeded apoptosis also, possibly by thwarting Hb breakdown followed by free iron release and consequent free radical generation. Additionally, direct sequential binding of OA with PHZ endorsed another protective mechanism of OA toward erythrocytes. OA affords protection to erythrocytes by conserving its major components and prevents haemolysis which projects OA as a haemato-protective agent. Apart from combating PHZ toxicity, anti-apoptotic action of OA strongly suggests its usage in anaemia and β-thalassaemia patients to curb irreversible erythrocyte breakdown. This research strongly recommends OA in pure form or from dietary sources as a therapeutic against haemolytic disorders.
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Affiliation(s)
- Adrita Banerjee
- Department of Physiology, Vidyasagar College, 39, Sankar Ghosh Lane, Kolkata, 700006, India; Oxidative Stress and Free Radical Biology Laboratory, Department of Physiology, University of Calcutta, 92, APC Road, Kolkata, 700009, India
| | - Tiyasa Dey
- Oxidative Stress and Free Radical Biology Laboratory, Department of Physiology, University of Calcutta, 92, APC Road, Kolkata, 700009, India
| | - Romit Majumder
- Department of Physiology, Vidyasagar College, 39, Sankar Ghosh Lane, Kolkata, 700006, India; Oxidative Stress and Free Radical Biology Laboratory, Department of Physiology, University of Calcutta, 92, APC Road, Kolkata, 700009, India
| | - Tuhin Bhattacharya
- Department of Physiology, University of Calcutta, 92, APC Road, Kolkata, 700009, India
| | - Sanjit Dey
- Department of Physiology, University of Calcutta, 92, APC Road, Kolkata, 700009, India
| | - Debasish Bandyopadhyay
- Oxidative Stress and Free Radical Biology Laboratory, Department of Physiology, University of Calcutta, 92, APC Road, Kolkata, 700009, India.
| | - Aindrila Chattopadhyay
- Department of Physiology, Vidyasagar College, 39, Sankar Ghosh Lane, Kolkata, 700006, India.
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Merlo A, Losserand S, Yaya F, Connes P, Faivre M, Lorthois S, Minetti C, Nader E, Podgorski T, Renoux C, Coupier G, Franceschini E. Influence of storage and buffer composition on the mechanical behavior of flowing red blood cells. Biophys J 2023; 122:360-373. [PMID: 36476993 PMCID: PMC9892622 DOI: 10.1016/j.bpj.2022.12.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 10/17/2022] [Accepted: 12/01/2022] [Indexed: 12/12/2022] Open
Abstract
On-chip study of blood flow has emerged as a powerful tool to assess the contribution of each component of blood to its overall function. Blood has indeed many functions, from gas and nutrient transport to immune response and thermal regulation. Red blood cells play a central role therein, in particular through their specific mechanical properties, which directly influence pressure regulation, oxygen perfusion, or platelet and white cell segregation toward endothelial walls. As the bloom of in-vitro studies has led to the apparition of various storage and sample preparation protocols, we address the question of the robustness of the results involving cell mechanical behavior against this diversity. The effects of three conservation media (EDTA, citrate, and glucose-albumin-sodium-phosphate) and storage time on the red blood cell mechanical behavior are assessed under different flow conditions: cell deformability by ektacytometry, shape recovery of cells flowing out of a microfluidic constriction, and cell-flipping dynamics under shear flow. The impact of buffer solutions (phosphate-buffered saline and density-matched suspension using iodixanol/Optiprep) are also studied by investigating individual cell-flipping dynamics, relative viscosity of cell suspensions, and cell structuration under Poiseuille flow. Our results reveal that storing blood samples up to 7 days after withdrawal and suspending them in adequate density-matched buffer solutions has, in most experiments, a moderate effect on the overall mechanical response, with a possible rapid evolution in the first 3 days after sample collection.
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Affiliation(s)
- Adlan Merlo
- GDR MECABIO, France; Institut de Mécanique des Fluides de Toulouse (IMFT), Université de Toulouse, CNRS, Toulouse, France; Biomechanics and Bioengineering Laboratory (UMR 7338), Université de Technologie de Compiègne - CNRS, Compiègne, France
| | - Sylvain Losserand
- GDR MECABIO, France; Université Grenoble Alpes, CNRS, LIPhy, Grenoble, France
| | - François Yaya
- GDR MECABIO, France; Université Grenoble Alpes, CNRS, LIPhy, Grenoble, France
| | - Philippe Connes
- GDR MECABIO, France; Team 'Vascular Biology and Red Blood Cell', Laboratoire Interuniversitaire de Biologie de la Motricité (LIBM) EA7424, Université Claude Bernard Lyon 1, Université de Lyon, Villeurbanne, France; Laboratoire d'Excellence du Globule Rouge (Labex GR-Ex), PRES Sorbonne, Paris, France
| | - Magalie Faivre
- GDR MECABIO, France; University Lyon, CNRS, INSA Lyon, Ecole Centrale de Lyon, Université Claude Bernard Lyon 1, CPE Lyon, INL, UMR5270, Villeurbanne, France
| | - Sylvie Lorthois
- GDR MECABIO, France; Institut de Mécanique des Fluides de Toulouse (IMFT), Université de Toulouse, CNRS, Toulouse, France
| | - Christophe Minetti
- Aero Thermo Mechanics CP 165/43, Université libre de Bruxelles, Brussels, Belgium
| | - Elie Nader
- GDR MECABIO, France; Team 'Vascular Biology and Red Blood Cell', Laboratoire Interuniversitaire de Biologie de la Motricité (LIBM) EA7424, Université Claude Bernard Lyon 1, Université de Lyon, Villeurbanne, France; Laboratoire d'Excellence du Globule Rouge (Labex GR-Ex), PRES Sorbonne, Paris, France
| | - Thomas Podgorski
- GDR MECABIO, France; Université Grenoble Alpes, CNRS, LIPhy, Grenoble, France; Université Grenoble Alpes, CNRS, Grenoble INP, LRP, Grenoble, France
| | - Céline Renoux
- GDR MECABIO, France; Team 'Vascular Biology and Red Blood Cell', Laboratoire Interuniversitaire de Biologie de la Motricité (LIBM) EA7424, Université Claude Bernard Lyon 1, Université de Lyon, Villeurbanne, France; Laboratoire d'Excellence du Globule Rouge (Labex GR-Ex), PRES Sorbonne, Paris, France; Service de biochimie et biologie moléculaire, Hospices Civils de Lyon, Lyon, France
| | - Gwennou Coupier
- GDR MECABIO, France; Université Grenoble Alpes, CNRS, LIPhy, Grenoble, France.
| | - Emilie Franceschini
- GDR MECABIO, France; Aix-Marseille University, CNRS, Centrale Marseille, LMA, Turing Center for Living Systems, Marseille, France.
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Fernando CA, Dissanayake DT, Hewamana UI, Rathnaweera S, Samanthilake WA, Tudugala R, Jayasekara KB, Kuruppu K. Alternative methods for calculating percentage haemolysis of red cell concentrates in peripheral blood banks in Sri Lanka. Afr J Lab Med 2023; 12:1987. [PMID: 36873291 PMCID: PMC9982517 DOI: 10.4102/ajlm.v12i1.1987] [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: 06/16/2022] [Accepted: 11/17/2022] [Indexed: 02/25/2023] Open
Abstract
Background Haemolysis - one of the major limiting factors of red cell concentrate quality - must be measured as a quality-monitoring requirement. According to international quality standards, percentage haemolysis must be monitored in 1.0% of red cell concentrates produced monthly and maintained under 0.8%. Objective This study assessed three alternative methods for determining plasma haemoglobin concentration in peripheral blood banks that lack a plasma or low haemoglobin photometer - the gold-standard method - in Sri Lanka. Methods A standard haemolysate was prepared using an unexpired whole blood pack of normal haemoglobin concentration. A concentration series from 0.1 g/dL to 1.0 g/dL was prepared by diluting portions of standard haemolysate with saline. The alternative methods, namely visual haemoglobin colour scale, spectrophotometric calibration graph, and standard haemolysate capillary tube comparison, were designed using this concentration series and were used to test red cell concentrates received at the Quality Control Department of the National Blood Center, Sri Lanka, from February 2021 to May 2021. Results A strong correlation was observed between the haemoglobin photometer method and the alternative methods (R = ~0.9). Based on the linear regression model, the standard haemolysate capillary tube comparison method was the best of the three alternative methods (R 2 = 0.974). Conclusion All three alternative methods are recommended for use in peripheral blood banks. The standard haemolysate capillary tube comparison method was the best model.
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Affiliation(s)
- Caroline A Fernando
- Department of Medical Laboratory Sciences, Faculty of Allied Health Sciences, General Sir John Kotelawala Defence University, Werahera, Sri Lanka
| | - Deklanji T Dissanayake
- Department of Medical Laboratory Sciences, Faculty of Allied Health Sciences, General Sir John Kotelawala Defence University, Werahera, Sri Lanka
| | - Uththara I Hewamana
- Department of Medical Laboratory Sciences, Faculty of Allied Health Sciences, General Sir John Kotelawala Defence University, Werahera, Sri Lanka
| | - Shyamini Rathnaweera
- Department of Medical Laboratory Sciences, Faculty of Allied Health Sciences, General Sir John Kotelawala Defence University, Werahera, Sri Lanka
| | | | - Ranga Tudugala
- Department of Radiography and Radiotherapy, Faculty of Allied Health Sciences, General Sir John Kotelawala Defence University, Werahera, Sri Lanka
| | - Kithsiri B Jayasekara
- Department of Medical Laboratory Sciences, Faculty of Allied Health Sciences, General Sir John Kotelawala Defence University, Werahera, Sri Lanka
| | - Kumudu Kuruppu
- Department of Quality Management, National Blood Center, Narahenpita, Sri Lanka
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Jacob SS, Lukose J, Bankapur A, Mithun N, Vani Lakshmi R, Acharya M, Rao P, Kamath A, Baby PM, Rao RK, Chidangil S. Micro-Raman spectroscopy study of optically trapped erythrocytes in malaria, dengue and leptospirosis infections. Front Med (Lausanne) 2022; 9:858776. [PMID: 36275819 PMCID: PMC9582609 DOI: 10.3389/fmed.2022.858776] [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: 01/20/2022] [Accepted: 09/13/2022] [Indexed: 11/13/2022] Open
Abstract
Malaria, dengue and leptospirosis are three tropical infectious diseases that present with severe hematological derangement causing significant morbidity and mortality, especially during the seasonal monsoons. During the course of these infectious diseases, circulating red blood cells are imperiled to the direct ill-effects of the infectious pathogen in the body as well as to the pro-inflammatory cytokines generated as a consequence of the infection. RBCs when exposed to such inflammatory and/or pathogenic milieu are susceptible to injuries such as RBC programmed eryptosis or RBC programmed necrosis. This research aimed to explore the Raman spectra of live red cells that were extracted from patients infected with malaria, dengue, and leptospirosis. Red cells were optically trapped and micro-Raman probed using a 785 nm Diode laser. RBCs from samples of all three diseases displayed Raman signatures that were significantly altered from the normal/healthy. Distinct spectral markers that were common across all the four groups were obtained from various standardized multivariate analytical methods. Following comprehensive examination of multiple studies, we propose these spectral wavenumbers as "Raman markers of RBC injury." Findings in our study display that anemia-triggering infections can inflict variations in the healthy status of red cells, easily identifiable by selectively analyzing specific Raman markers. Additionally, this study also highlights relevant statistical tools that can be utilized to study Raman spectral data from biological samples which could help identify the very significant Raman peaks from the spectral band. This approach of RBC analysis can foster a better understanding of red cell behavior and their alterations exhibited in health and disease.
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Affiliation(s)
- Sanu Susan Jacob
- Department of Physiology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India,*Correspondence: Sanu Susan Jacob,
| | - Jijo Lukose
- Department of Atomic and Molecular Physics, Centre of Excellence for Biophotonics, Manipal Academy of Higher Education, Manipal, India
| | - Aseefhali Bankapur
- Department of Atomic and Molecular Physics, Centre of Excellence for Biophotonics, Manipal Academy of Higher Education, Manipal, India
| | - N. Mithun
- Department of Atomic and Molecular Physics, Centre of Excellence for Biophotonics, Manipal Academy of Higher Education, Manipal, India
| | - R. Vani Lakshmi
- Department of Data Science, Prasanna School of Public Health, Manipal Academy of Higher Education, Manipal, India
| | - Mahendra Acharya
- Department of Atomic and Molecular Physics, Centre of Excellence for Biophotonics, Manipal Academy of Higher Education, Manipal, India
| | - Pragna Rao
- Department of Biochemistry, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India
| | - Asha Kamath
- Department of Data Science, Prasanna School of Public Health, Manipal Academy of Higher Education, Manipal, India
| | - Prathap M. Baby
- Department of Physiology, Melaka Manipal Medical College, Manipal Academy of Higher Education, Manipal, India
| | - Raghavendra K. Rao
- Department of Physiology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India
| | - Santhosh Chidangil
- Department of Atomic and Molecular Physics, Centre of Excellence for Biophotonics, Manipal Academy of Higher Education, Manipal, India
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6
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Lucas IT, Bazin D, Daudon M. Raman opportunities in the field of pathological calcifications. CR CHIM 2022. [DOI: 10.5802/crchim.110] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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7
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Vardaki MZ, Georg Schulze H, Serrano K, Blades MW, Devine DV, F B Turner R. Assessing the quality of stored red blood cells using handheld Spatially Offset Raman spectroscopy with multisource correlation analysis. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 276:121220. [PMID: 35395462 DOI: 10.1016/j.saa.2022.121220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 03/23/2022] [Accepted: 03/29/2022] [Indexed: 06/14/2023]
Abstract
In this work we employ Spatially Offset Raman Spectroscopy (SORS) to non-invasively identify storage-related changes in red blood cell concentrate (RCC) in-situ within standard plastic transfusion bags. To validate the measurements, we set up a parallel study comparing both bioanalytical data (obtained by blood-gas analysis, hematology analysis and spectrophotometric assays), and Raman spectrometry data from the same blood samples. We then employ Multisource Correlation Analysis (MuSCA) to correlate the different types of data in RCC. Our analysis confirmed a strong correlation of glucose, methemoglobin and oxyhemoglobin with their respective bioassay values in RCC units. Finally, by combining MuSCA with k-means clustering, we assessed changes in all Raman wavenumbers during cold storage in both RCC Raman data from the current study and parallel RCC supernatant Raman data previously acquired from the same units. Direct RCC quality monitoring during storage, would help to establish a basis for improved inventory management of blood products in blood banks and hospitals based on analytical data.
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Affiliation(s)
- Martha Z Vardaki
- Institute of Chemical Biology, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, Athens 11635, Greece
| | - H Georg Schulze
- Monte do Tojal, Caixa Postal 128, Hortinhas, Terena 7250-069, Portugal
| | - Katherine Serrano
- Department of Pathology and Laboratory Medicine, The University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC V6 T 2B5, Canada; Centre for Blood Research, The University of British Columbia, 2350 Health Sciences Mall, Vancouver, BC V6 T 1Z3, Canada; Centre for Innovation, Canadian Blood Services
| | - Michael W Blades
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, BC V6 T 1Z1, Canada
| | - Dana V Devine
- Department of Pathology and Laboratory Medicine, The University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC V6 T 2B5, Canada; Centre for Blood Research, The University of British Columbia, 2350 Health Sciences Mall, Vancouver, BC V6 T 1Z3, Canada; Centre for Innovation, Canadian Blood Services
| | - Robin F B Turner
- Michael Smith Laboratories, The University of British Columbia, 2185 East Mall, Vancouver, BC V6 T 1Z4, Canada; Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, BC V6 T 1Z1, Canada; Department of Electrical and Computer Engineering, The University of British Columbia, 2332 Main Mall, Vancouver, BC V6 T 1Z4, Canada
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8
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HBOC-301 in Porcine Kidney Normothermic Machine Perfusion and the Effect of Vitamin C on Methemoglobin Formation. Antioxidants (Basel) 2022; 11:antiox11071329. [PMID: 35883821 PMCID: PMC9311674 DOI: 10.3390/antiox11071329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 06/30/2022] [Accepted: 07/05/2022] [Indexed: 11/30/2022] Open
Abstract
Normothermic machine perfusion (NMP) of kidneys in combination with an optimized perfusate composition may increase donor organ preservation quality, especially in the case of marginal donor grafts. Optimization of currently employed perfusates is still a subject of present research. Due to the advantages of being cell-free, easy to store, and having minimal antigenicity, hemoglobin-based oxygen carriers, such as HBOC-301 (Oxyglobin®, Hemoglobin Oxygen Therapeutics LLC, Souderton, PA, USA), offer an alternative to the commonly used perfusates based on packed red blood cells (pRBC). As previously described, using HBOC results in formation of methemoglobin (metHb) as an adverse effect, inducing hypoxic conditions during the perfusion. As a potential counterpart to metHb formation, the application of the antioxidant ascorbic acid (VitC) is of high interest. Therefore, this study was conducted in four experimental groups, to compare the effect of NMP with (1) HBOC or (3) pRBC, and additionally examine a beneficial effect of VitC in both groups (2) HBOC + VitC and (4) pRBC + VitC. All groups were subjected to NMP for 6 h at a pressure of 75 mmHg. Kidneys in the HBOC groups had a significantly lower renal blood flow and increasing intrarenal resistance, with reduced renal function in comparison to the pRBC groups, as demonstrated by significantly lower creatinine clearance and higher fractional sodium excretion rates. Clinical chemistry markers for tissue damage (LDH, lactate) were higher in the HBOC groups, whereas no significant histological differences were observed. Although the application of VitC decreased oxidative stress levels, it was not able to significantly increase the outcome parameters mentioned above in either group. This study demonstrated that HBOC-301 is inferior to pRBCs in our porcine kidney NMP model, independent of additional VitC administration. Oxidative stress and fragmentation of the hemoglobin polymers could be detected as a possible reason for these results, hence further research, focusing on the use of cell-free oxygen carriers that do not exhibit this complex of issues, is required.
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9
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Alix JJP, Plesia M, Hool SA, Coldicott I, Kendall CA, Shaw PJ, Mead RJ, Day JC. Fibre optic Raman spectroscopy for the evaluation of disease state in Duchenne muscular dystrophy: an assessment using the mdx model and human muscle. Muscle Nerve 2022; 66:362-369. [PMID: 35762576 PMCID: PMC9541045 DOI: 10.1002/mus.27671] [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: 10/14/2021] [Revised: 06/22/2022] [Accepted: 06/26/2022] [Indexed: 12/04/2022]
Abstract
Introduction/Aims Raman spectroscopy is an emerging technique for the evaluation of muscle disease. In this study we evaluate the ability of in vivo intramuscular Raman spectroscopy to detect the effects of voluntary running in the mdx model of Duchenne muscular dystrophy (DMD). We also compare mdx data with muscle spectra from human DMD patients. Methods Thirty 90‐day‐old mdx mice were randomly allocated to an exercised group (48‐hour access to a running wheel) and an unexercised group (n = 15 per group). In vivo Raman spectra were collected from both gastrocnemius muscles and histopathological assessment subsequently performed. Raman data were analyzed using principal component analysis–fed linear discriminant analysis (PCA‐LDA). Exercised and unexercised mdx muscle spectra were compared with human DMD samples using cosine similarity. Results Exercised mice ran an average of 6.5 km over 48 hours, which induced a significant increase in muscle necrosis (P = .03). PCA‐LDA scores were significantly different between the exercised and unexercised groups (P < .0001) and correlated significantly with distance run (P = .01). Raman spectra from exercised mice more closely resembled human spectra than those from unexercised mice. Discussion Raman spectroscopy provides a readout of the biochemical alterations in muscle in both the mdx mouse and human DMD muscle.
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Affiliation(s)
- James J P Alix
- Sheffield Institute for Translational Neuroscience, University of Sheffield.,Neuroscience Institute, University of Sheffield
| | - Maria Plesia
- Sheffield Institute for Translational Neuroscience, University of Sheffield
| | - Sarah A Hool
- Sheffield Institute for Translational Neuroscience, University of Sheffield
| | - Ian Coldicott
- Sheffield Institute for Translational Neuroscience, University of Sheffield
| | | | - Pamela J Shaw
- Sheffield Institute for Translational Neuroscience, University of Sheffield.,Neuroscience Institute, University of Sheffield
| | - Richard J Mead
- Sheffield Institute for Translational Neuroscience, University of Sheffield.,Neuroscience Institute, University of Sheffield
| | - John C Day
- Interface Analysis Centre, School of Physics, University of Bristol
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10
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Point-of-Care Testing Blood Coagulation Detectors Using a Bio-Microfluidic Device Accompanied by Raman Spectroscopy. COATINGS 2022. [DOI: 10.3390/coatings12070893] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
An efficient technique was developed for the detection of human blood coagulation using a bio-microfluidic device based on Raman spectra [...]
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11
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Nikelshparg EI, Baizhumanov AA, Bochkova ZV, Novikov SM, Yakubovsky DI, Arsenin AV, Volkov VS, Goodilin EA, Semenova AA, Sosnovtseva O, Maksimov GV, Brazhe NA. Detection of Hypertension-Induced Changes in Erythrocytes by SERS Nanosensors. BIOSENSORS 2022; 12:32. [PMID: 35049660 PMCID: PMC8773528 DOI: 10.3390/bios12010032] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 01/04/2022] [Accepted: 01/05/2022] [Indexed: 05/14/2023]
Abstract
Surface-enhanced Raman spectroscopy (SERS) is a promising tool that can be used in the detection of molecular changes triggered by disease development. Cardiovascular diseases (CVDs) are caused by multiple pathologies originating at the cellular level. The identification of these deteriorations can provide a better understanding of CVD mechanisms, and the monitoring of the identified molecular changes can be employed in the development of novel biosensor tools for early diagnostics. We applied plasmonic SERS nanosensors to assess changes in the properties of erythrocytes under normotensive and hypertensive conditions in the animal model. We found that spontaneous hypertension in rats leads (i) to a decrease in the erythrocyte plasma membrane fluidity and (ii) to a decrease in the mobility of the heme of the membrane-bound hemoglobin. We identified SERS parameters that can be used to detect pathological changes in the plasma membrane and submembrane region of erythrocytes.
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Affiliation(s)
- Evelina I. Nikelshparg
- Department of Biophysics, Biological Faculty, Moscow State University, 119991 Moscow, Russia; (A.A.B.); (Z.V.B.); (G.V.M.)
| | - Adil A. Baizhumanov
- Department of Biophysics, Biological Faculty, Moscow State University, 119991 Moscow, Russia; (A.A.B.); (Z.V.B.); (G.V.M.)
| | - Zhanna V. Bochkova
- Department of Biophysics, Biological Faculty, Moscow State University, 119991 Moscow, Russia; (A.A.B.); (Z.V.B.); (G.V.M.)
| | - Sergey M. Novikov
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology (MIPT), 141700 Dolgoprudny, Russia; (S.M.N.); (D.I.Y.); (A.V.A.); (V.S.V.)
| | - Dmitry I. Yakubovsky
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology (MIPT), 141700 Dolgoprudny, Russia; (S.M.N.); (D.I.Y.); (A.V.A.); (V.S.V.)
| | - Aleksey V. Arsenin
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology (MIPT), 141700 Dolgoprudny, Russia; (S.M.N.); (D.I.Y.); (A.V.A.); (V.S.V.)
| | - Valentyn S. Volkov
- Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology (MIPT), 141700 Dolgoprudny, Russia; (S.M.N.); (D.I.Y.); (A.V.A.); (V.S.V.)
| | - Eugene A. Goodilin
- Faculty of Materials Sciences, Moscow State University, 119991 Moscow, Russia; (E.A.G.); (A.A.S.)
- Department of Chemistry, Moscow State University, 119991 Moscow, Russia
| | - Anna A. Semenova
- Faculty of Materials Sciences, Moscow State University, 119991 Moscow, Russia; (E.A.G.); (A.A.S.)
| | - Olga Sosnovtseva
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark;
| | - Georgy V. Maksimov
- Department of Biophysics, Biological Faculty, Moscow State University, 119991 Moscow, Russia; (A.A.B.); (Z.V.B.); (G.V.M.)
- Department of Physical Material Engineering, Federal State Autonomous Educational Institution of Higher Education “National Research Technological University “MISiS”, 119049 Moscow, Russia
| | - Nadezda A. Brazhe
- Department of Biophysics, Biological Faculty, Moscow State University, 119991 Moscow, Russia; (A.A.B.); (Z.V.B.); (G.V.M.)
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12
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Martin M, Perez-Guaita D, Wood BR. ATR-FTIR spectroscopy as a quality control system for monitoring the storage of blood products. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:5756-5763. [PMID: 34816272 DOI: 10.1039/d1ay01242h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Blood screening is a fundamental part of disease diagnosis and monitoring health. Attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy offers an innovative solution to streamlining the process, especially for multianalyte detection in aqueous samples. However, samples always undergo a storage phase before they are processed for testing and blood transfusion. In this study, we investigated the effect of standard storage procedures on the macromolecular composition of whole blood, and plasma collected in blood tubes for diagnostic purposes and initial screening of blood products. Periphery blood samples were collected from 10 volunteers and then stored for 14 days at 4 °C. Samples were stored as isolated plasma and whole blood to provide three different datasets, namely: (1) plasma stored independently, (2) plasma stored with other blood components and (3) whole blood. ATR-FTIR spectra of aqueous blood were acquired every 24 h from the time of collection on a portable ATR-FTIR spectrophotometer to monitor the evolution of the macromolecular composition in each blood component. Principal component analysis (PCA), partial least squares regression (PLS-R) and multi-curve resolution alternate least squares (MCR-ALS) models were built to study changes in the spectra with the storage time and identify the key bands. Isolated plasma stored without red blood cells (RBCs) showed no changes over the 14 day period indicating limited degradation. By contrast, plasma stored with the other blood components showed visual and spectroscopic signs of degradation including increasing lipid bands and the amide I and II bands from haemoglobin (Hb). Ideally, for the application of IR spectroscopy in blood diagnostics and for initial screening of blood products, whole blood and isolated red blood cells can be stored for a maximum of 4 days at 4 °C in lithium-heparin anticoagulant tubes prior to spectral analysis before any signs of degradation. Isolated plasma, on the other hand, can be stored for much longer periods and shows no evidence of degradation in the spectra after 14 days.
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Affiliation(s)
- Miguela Martin
- Centre for Biospectroscopy, Monash University, Clayton, 3800, Victoria, Australia.
| | - David Perez-Guaita
- Department of Analytical Chemistry, University of Valencia, Burjassot, Spain
| | - Bayden R Wood
- Centre for Biospectroscopy, Monash University, Clayton, 3800, Victoria, Australia.
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13
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Soysal KB, Parlatan S, Mastanzade M, Ozbalak M, Yenerel MN, Unlu MB, Basar G, Parlatan U. Raman tweezers as an alternative diagnostic tool for paroxysmal nocturnal hemoglobinuria. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:3963-3969. [PMID: 34528949 DOI: 10.1039/d1ay01116b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Paroxysmal nocturnal hemoglobinuria (PNH) is a rare disease characterized by hemolysis of red blood cells (RBC) and venous thrombosis. The gold standard method for the diagnosis of this disease is flow cytometry. Here, we propose a combined optical tweezers and Raman spectral (Raman tweezers) approach to analyze blood samples from volunteers with or without PNH conditions. Raman spectroscopy is a well-known method for investigating a material's chemical structure and is also used in molecular analysis of biological compounds. In this study, we trap individual RBCs found in whole blood samples drawn from PNH patients and the control group. Evaluation of the Raman spectra of these cells by band component analysis and machine learning shows a significant difference between the two groups. The specificity and the sensitivity of the training performed by support vector machine (SVM) analysis were found to be 81.8% and 78.3%, respectively. This study shows that an immediate and high accuracy test result is possible for PNH disease by employing Raman tweezers and machine learning.
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Affiliation(s)
| | - Seyma Parlatan
- Istinye University, Vocational School of Health Services, Istanbul, Turkey
| | - Metban Mastanzade
- Istanbul University Istanbul Faculty of Medicine, Hematology, Istanbul, Turkey
| | - Murat Ozbalak
- Istanbul University Istanbul Faculty of Medicine, Hematology, Istanbul, Turkey
| | | | | | - Gunay Basar
- Istanbul Technical University, Physics Engineering, Istanbul, Turkey
| | - Ugur Parlatan
- Bogazici University, Department of Physics, Istanbul, Turkey
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14
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Livshits L, Barshtein G, Arbell D, Gural A, Levin C, Guizouarn H. Do We Store Packed Red Blood Cells under "Quasi-Diabetic" Conditions? Biomolecules 2021; 11:biom11070992. [PMID: 34356616 PMCID: PMC8301930 DOI: 10.3390/biom11070992] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 06/21/2021] [Accepted: 07/01/2021] [Indexed: 01/28/2023] Open
Abstract
Red blood cell (RBC) transfusion is one of the most common therapeutic procedures in modern medicine. Although frequently lifesaving, it often has deleterious side effects. RBC quality is one of the critical factors for transfusion efficacy and safety. The role of various factors in the cells’ ability to maintain their functionality during storage is widely discussed in professional literature. Thus, the extra- and intracellular factors inducing an accelerated RBC aging need to be identified and therapeutically modified. Despite the extensively studied in vivo effect of chronic hyperglycemia on RBC hemodynamic and metabolic properties, as well as on their lifespan, only limited attention has been directed at the high sugar concentration in RBCs storage media, a possible cause of damage to red blood cells. This mini-review aims to compare the biophysical and biochemical changes observed in the red blood cells during cold storage and in patients with non-insulin-dependent diabetes mellitus (NIDDM). Given the well-described corresponding RBC alterations in NIDDM and during cold storage, we may regard the stored (especially long-stored) RBCs as “quasi-diabetic”. Keeping in mind that these RBC modifications may be crucial for the initial steps of microvascular pathogenesis, suitable preventive care for the transfused patients should be considered. We hope that our hypothesis will stimulate targeted experimental research to establish a relationship between a high sugar concentration in a storage medium and a deterioration in cells’ functional properties during storage.
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Affiliation(s)
- Leonid Livshits
- Red Blood Cell Research Group, Institute of Veterinary Physiology, Vetsuisse Faculty, University of Zürich, CH-8057 Zurich, Switzerland;
| | - Gregory Barshtein
- Biochemistry Department, The Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91905, Israel
- Correspondence: ; Tel.: +972-2-6758309
| | - Dan Arbell
- Pediatric Surgery Department, Hadassah Hebrew University Medical Center, Jerusalem 91120, Israel;
| | - Alexander Gural
- Department of Hematology, Hadassah Hebrew University Medical Center, Jerusalem 91120, Israel;
| | - Carina Levin
- Pediatric Hematology Unit, Emek Medical Center, Afula 1834111, Israel;
- The Ruth and Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Hélène Guizouarn
- Institut de Biologie Valrose, Université Côte d’Azur, CNRS, Inserm, 28 Av. Valrose, 06100 Nice, France;
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15
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Verma T, Majumdar S, Yadav S, Ahmed SM, Umapathy S, Nandi D. Cell-free hemoglobin is a marker of systemic inflammation in mouse models of sepsis: a Raman spectroscopic study. Analyst 2021; 146:4022-4032. [PMID: 34032232 DOI: 10.1039/d1an00066g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Sepsis is a life-threatening condition caused by heightened host immune responses post infection. Despite intensive research, most of the existing diagnostic methods remain non-specific, labour-intensive, time-consuming or are not sensitive enough for rapid and timely diagnosis of the onset and progression of sepsis. The present work was undertaken to explore the potential of Raman spectroscopy to identify the biomarkers of sepsis in a label-free and minimally invasive manner using different mouse models of inflammation. The sera of BALB/c mice infected with Salmonella Typhimurium reveal extensive hemolysis, as indicated by the Raman bands that are characteristic of the porphyrin ring of hemoglobin (668, 743, 1050, 1253 and 1397 cm-1) which increase in a kinetic manner. These markers are also observed in a lipopolysaccharide-induced endotoxic shock model, but not in a thioglycollate-induced sterile peritonitis model. These data demonstrate that hemolysis is a signature of systemic, but not localised, inflammation. To further validate our observations, sepsis was induced in the nitric oxide synthase 2 (Nos2-/-) deficient strain which is more sensitive to infection. Interestingly, Nos2-/- mice exhibit a higher degree of hemolysis than C57BL/6 mice. Sepsis-induced hemolysis was also confirmed using resonance Raman spectroscopy with 442 nm excitation which demonstrated a pronounced increase in the resonant Raman bands at 670 and 1350 cm-1 in sera of the infected mice. This is the first study to identify inflammation-induced hemolysis in mouse models of sepsis using Raman spectral signatures for hemoglobin. The possible implications of this method in detecting hemolysis in different inflammatory pathologies, such as the ongoing COVID-19 pandemic, are discussed.
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Affiliation(s)
- Taru Verma
- Centre for BioSystems Science and Engineering, Indian Institute of Science, Bangalore, India.
| | - Shamik Majumdar
- Department of Biochemistry, Indian Institute of Science, Bangalore, India
| | - Shikha Yadav
- Department of Biochemistry, Indian Institute of Science, Bangalore, India
| | - Syed Moiz Ahmed
- Department of Biochemistry, Indian Institute of Science, Bangalore, India
| | - Siva Umapathy
- Centre for BioSystems Science and Engineering, Indian Institute of Science, Bangalore, India. and Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, India
| | - Dipankar Nandi
- Centre for BioSystems Science and Engineering, Indian Institute of Science, Bangalore, India. and Department of Biochemistry, Indian Institute of Science, Bangalore, India
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16
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Pan T, Lu D, Xin H, Li B. Biophotonic probes for bio-detection and imaging. LIGHT, SCIENCE & APPLICATIONS 2021; 10:124. [PMID: 34108445 PMCID: PMC8190087 DOI: 10.1038/s41377-021-00561-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 05/10/2021] [Accepted: 05/21/2021] [Indexed: 05/08/2023]
Abstract
The rapid development of biophotonics and biomedical sciences makes a high demand on photonic structures to be interfaced with biological systems that are capable of manipulating light at small scales for sensitive detection of biological signals and precise imaging of cellular structures. However, conventional photonic structures based on artificial materials (either inorganic or toxic organic) inevitably show incompatibility and invasiveness when interfacing with biological systems. The design of biophotonic probes from the abundant natural materials, particularly biological entities such as virus, cells and tissues, with the capability of multifunctional light manipulation at target sites greatly increases the biocompatibility and minimizes the invasiveness to biological microenvironment. In this review, advances in biophotonic probes for bio-detection and imaging are reviewed. We emphatically and systematically describe biological entities-based photonic probes that offer appropriate optical properties, biocompatibility, and biodegradability with different optical functions from light generation, to light transportation and light modulation. Three representative biophotonic probes, i.e., biological lasers, cell-based biophotonic waveguides and bio-microlenses, are reviewed with applications for bio-detection and imaging. Finally, perspectives on future opportunities and potential improvements of biophotonic probes are also provided.
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Affiliation(s)
- Ting Pan
- Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China
| | - Dengyun Lu
- Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China
| | - Hongbao Xin
- Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China.
| | - Baojun Li
- Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China.
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17
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López-Canizales AM, Angulo-Molina A, Garibay-Escobar A, Silva-Campa E, Mendez-Rojas MA, Santacruz-Gómez K, Acosta-Elías M, Castañeda-Medina B, Soto-Puebla D, Álvarez-Bajo O, Burgara-Estrella A, Pedroza-Montero M. Nanoscale Changes on RBC Membrane Induced by Storage and Ionizing Radiation: A Mini-Review. Front Physiol 2021; 12:669455. [PMID: 34149450 PMCID: PMC8213202 DOI: 10.3389/fphys.2021.669455] [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: 02/19/2021] [Accepted: 05/10/2021] [Indexed: 11/25/2022] Open
Abstract
The storage lesions and the irradiation of blood cellular components for medical procedures in blood banks are events that may induce nanochanges in the membrane of red blood cells (RBCs). Alterations, such as the formation of pores and vesicles, reduce flexibility and compromise the overall erythrocyte integrity. This review discusses the alterations on erythrocytic lipid membrane bilayer through their characterization by confocal scanning microscopy, Raman, scanning electron microscopy, and atomic force microscopy techniques. The interrelated experimental results may address and shed light on the correlation of biomechanical and biochemical transformations induced in the membrane and cytoskeleton of stored and gamma-irradiated RBC. To highlight the main advantages of combining these experimental techniques simultaneously or sequentially, we discuss how those outcomes observed at micro- and nanoscale cell levels are useful as biomarkers of cell aging and storage damage.
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Affiliation(s)
| | - Aracely Angulo-Molina
- Departamento de Ciencias Químico-Biológicas, Universidad de Sonora, Hermosillo, Mexico
| | | | - Erika Silva-Campa
- Departamento de Investigación en Física, Universidad de Sonora, Hermosillo, Mexico
| | - Miguel A. Mendez-Rojas
- Departamento de Ciencias Químico-Biológicas, Universidad de las Américas, Puebla, Mexico
| | | | - Mónica Acosta-Elías
- Departamento de Investigación en Física, Universidad de Sonora, Hermosillo, Mexico
| | | | - Diego Soto-Puebla
- Departamento de Investigación en Física, Universidad de Sonora, Hermosillo, Mexico
| | - Osiris Álvarez-Bajo
- Departamento de Investigación en Física, Universidad de Sonora, Hermosillo, Mexico
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18
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Lenzi E, Dinarelli S, Longo G, Girasole M, Mussi V. Multivariate analysis of mean Raman spectra of erythrocytes for a fast analysis of the biochemical signature of ageing. Talanta 2021; 221:121442. [PMID: 33076067 DOI: 10.1016/j.talanta.2020.121442] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 07/16/2020] [Accepted: 07/19/2020] [Indexed: 12/12/2022]
Abstract
Ageing of red blood cells (RBC) is a physiological process, fundamental to ensure a proper blood homeostasis that, in vivo, balances the production of new cells and the removal of senescent erythrocytes. A detailed characterization at the cellular level of the progression of the ageing phenomenon can reveal biological, biophysical and biochemical fingerprints for diseases related to misbalances of the cell turnover and for blood pathologies. We applied Principal Components Analysis (PCA) to mean Raman spectra of single cells at different ageing times to rapidly highlight subtle spectral differences associated with conformational and biochemical modifications. Our results demonstrate a two-step ageing process characterized by a first phase in which proteins plays a relevant role, followed by a further cellular evolution driven by alterations in the membrane lipid contribution. Moreover, we used the same approach to directly analyse relevant spectral effects associated to reduction in Haemoglobin oxygenation level and membrane fluidity induced by the ageing. The method is robust and effective, allowing to classify easily the studied cells based on their age and morphology, and consequently to evaluate the biological quality of a blood sample.
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Affiliation(s)
- E Lenzi
- Physics Department, University of Rome Tor Vergata, Rome, Italy
| | - S Dinarelli
- Institute of Structure of Matter, National Research Council, Rome, Italy
| | - G Longo
- Institute of Structure of Matter, National Research Council, Rome, Italy
| | - M Girasole
- Institute of Structure of Matter, National Research Council, Rome, Italy
| | - V Mussi
- Institute of Microelectronics and Microsystems, National Research Council, Rome, Italy.
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19
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Sebastian JA, Kolios MC, Acker JP. Emerging use of machine learning and advanced technologies to assess red cell quality. Transfus Apher Sci 2020; 59:103020. [PMID: 33246838 DOI: 10.1016/j.transci.2020.103020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Improving blood product quality and patient outcomes is an accepted goal in transfusion medicine research. Thus, there is an urgent need to understand the potential adverse effects on red blood cells (RBCs) during pre-transfusion storage. Current assessment techniques of these degradation events, termed "storage lesions", are subjective, labor-intensive, and complex. Here we describe emerging technologies that assess the biochemical, biophysical, and morphological characteristics of RBC storage lesions. Of these emerging techniques, machine learning (ML) has shown potential to overcome the limitations of conventional RBC assessment methods. Our previous work has shown that neural networks can extract chronological progressions of morphological changes in RBCs during storage without human input. We hypothesize that, with broader training and testing of multivariate data (e.g., varying donor factors and manufacturing methods), ML can further our understanding of clinical transfusion outcomes in multiple patient groups.
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Affiliation(s)
- Joseph A Sebastian
- Institute of Biomedical Engineering, University of Toronto, 164 College St., Toronto, Ontario, M5S 3G9, Canada; Translational Biology and Engineering Program, Ted Rogers Center for Heart Research, 661 University Avenue, Toronto, ON, M5G 1X8, Canada.
| | - Michael C Kolios
- Department of Physics, Ryerson University, 350 Victoria St., Toronto, Ontario, M5B 2K3, Canada; Institute of Biomedical Engineering, Science and Technology (iBEST), A Partnership Between Ryerson University and St. Michael's Hospital, 209 Victoria St, Toronto, Ontario, M5B 1T8, Canada; Keenan Research Centre for Biomedical Science, Li Ka Shing Knowledge Institute, St. Michael's Hospital, 209 Victoria St., Toronto, Ontario, M5B 1T8, Canada.
| | - Jason P Acker
- Centre for Innovation, Canadian Blood Services, 8249-114 St., Edmonton, Alberta, T6G 2R8, Canada; Department of Laboratory Medicine and Pathology, University of Alberta, 8249-114 St., Edmonton, Alberta, T6G 2R8, Canada.
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20
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Gautam R, Peoples D, Jansen K, O'Connor M, Thomas G, Vanga S, Pence IJ, Mahadevan-Jansen A. Feature Selection and Rapid Characterization of Bloodstains on Different Substrates. APPLIED SPECTROSCOPY 2020; 74:1238-1251. [PMID: 32519560 DOI: 10.1177/0003702820937776] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Establishing the precise timeline of a crime can be challenging as current analytical techniques used suffer from many limitations and are destructive to the body fluids encountered at crime scenes. Raman spectroscopy has demonstrated excellent potential in forensic science as it provides direct information about the structural and molecular changes without the need for processing or extracting samples. However, its current applicability is limited to pure body fluids, as signals from the substrate underlying these fluids greatly influence the current models used for age estimation. In this study, we utilized Raman spectroscopy to identify selective spectral markers that delineate the bloodstain age in the presence of interfering signals from the substrate. The pure bloodstains and the bloodstains on the substrate were aged for two weeks at 21 ± 2 ℃ in the dark. Least absolute shrinkage and selection operator (LASSO) regression was employed to guide the feature selection in the presence of interference from substrates to accurately predict the bloodstain age. Substrate-specific regression models guided by an automated feature selection algorithm yielded low values of predictive root mean square error (0.207, 0.204, 0.222 h in logarithmic scale) and high R2 (0.924, 0.926, 0.913) on test data consisting of blood spectra on floor tile, facial tissue, and linoleum-polymer substrates, respectively. This framework for an automated feature selection algorithm relies entirely on pure bloodstain spectra to train substrate-specific models for estimating the age of composite (blood on substrate) spectra. The model can thus be easily applied to any new composite spectra and is highly scalable to new environments. This study demonstrates that Raman spectroscopy coupled with LASSO could serve as a reliable and nondestructive technique to determine the age of bloodstains on any surface while aiding forensic investigations in real-world scenarios.
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Affiliation(s)
- Rekha Gautam
- Department of Biomedical Engineering, 5718Vanderbilt University, Nashville, USA
| | - Deandra Peoples
- Department of Biomedical Engineering, 5718Vanderbilt University, Nashville, USA
| | - Kiana Jansen
- Department of Biomedical Engineering, 5718Vanderbilt University, Nashville, USA
| | - Maggie O'Connor
- Department of Biomedical Engineering, 5718Vanderbilt University, Nashville, USA
| | - Giju Thomas
- Department of Biomedical Engineering, 5718Vanderbilt University, Nashville, USA
| | | | - Isaac J Pence
- Department of Biomedical Engineering, 5718Vanderbilt University, Nashville, USA
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21
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Jacob SS, Bankapur A, Barkur S, Acharya M, Chidangil S, Rao P, Kamath A, Lakshmi RV, Baby PM, Rao RK. Micro-Raman Spectroscopy Analysis of Optically Trapped Erythrocytes in Jaundice. Front Physiol 2020; 11:821. [PMID: 32754052 PMCID: PMC7366392 DOI: 10.3389/fphys.2020.00821] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Accepted: 06/19/2020] [Indexed: 12/31/2022] Open
Abstract
Derangements in bilirubin metabolism and/or dysfunctions in the hepato-biliary system lead to the unhealthy buildup of bilirubin in blood, resulting in jaundice. During the course of this disorder, circulating red cells are invariably subjected to toxic effects of serum bilirubin and an array of inflammatory compounds. This study aimed to investigate the vibrational spectroscopy of live red cells in jaundice using micro-Raman spectroscopy combined with optical-trap. Red cells from blood samples of healthy volunteers and patients with jaundice were optically immobilized and micro-Raman probed using a 785 nm diode laser. Raman signatures from red cells in jaundice exhibited significant variations from the normal and the spectral-markers were obtained from multivariate analytical methods. This research gives insightful views on how different pathologies can act as "stress-milieus" for red cells in circulation, possibly impeding their normal functions and also exasperating anemia. Raman spectroscopy, an emerging bio-analytical technique, is sensitive in detecting molecular-conformations in situ, at cellular-levels and in real-time. This study could pave way in understanding fundamental red cell behavior in different diseases by analyzing Raman markers.
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Affiliation(s)
- Sanu Susan Jacob
- Department of Physiology, Kasturba Medical College-Manipal, Manipal Academy of Higher Education, Manipal, India
| | - Aseefhali Bankapur
- Department of Atomic and Molecular Physics, Centre of Excellence for Biophotonics, Manipal Academy of Higher Education, Manipal, India
| | - Surekha Barkur
- Department of Atomic and Molecular Physics, Centre of Excellence for Biophotonics, Manipal Academy of Higher Education, Manipal, India
| | - Mahendra Acharya
- Department of Atomic and Molecular Physics, Centre of Excellence for Biophotonics, Manipal Academy of Higher Education, Manipal, India
| | - Santhosh Chidangil
- Department of Atomic and Molecular Physics, Centre of Excellence for Biophotonics, Manipal Academy of Higher Education, Manipal, India
| | - Pragna Rao
- Department of Biochemistry, Kasturba Medical College-Manipal, Manipal Academy of Higher Education, Manipal, India
| | - Asha Kamath
- Department of Data Science, Prasanna School of Public Health, Manipal Academy of Higher Education, Manipal, India
| | - R. Vani Lakshmi
- Department of Data Science, Prasanna School of Public Health, Manipal Academy of Higher Education, Manipal, India
| | - Prathap M. Baby
- Department of Physiology, Melaka Manipal Medical College, Manipal Academy of Higher Education, Manipal, India
| | - Raghavendra K. Rao
- Department of Physiology, Kasturba Medical College-Manipal, Manipal Academy of Higher Education, Manipal, India
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22
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Lukose J, Shastry S, Mithun N, Mohan G, Ahmed A, Chidangil S. Red blood cells under varying extracellular tonicity conditions: an optical tweezers combined with micro-Raman study. Biomed Phys Eng Express 2020; 6:015036. [PMID: 33438624 DOI: 10.1088/2057-1976/ab6e1a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Extracellular tonicity has a significant influence on human red blood cell deformation capability. Advancements in the area of laser physics and optical trapping have opened up a plethora of applications for understanding cell structure and dynamics. Here, Raman Tweezers technique was employed to investigate the impact of extracellular tonicity by exposing human red blood cells to both hypertonic and hypotonic intravenous fluids. Heme aggregation was observed in hypertonic saline solution, accompanied with damage in membrane protein. Loss of intracellular hemoglobin in hypotonic solution was evident from the decrease in porphyrin breathing mode present at 752 cm-1. Oxygen binding to the central iron in the red blood cell heme was also affected under both hyper/hypo tonicity conditions. Morphological deviation of discocytes to echinocytes/spherocytes were also evident from quantitative phase imaging. Principal component analysis have showed clear differentiation of samples in order to classify the control erythrocytes and the tonicity stressed erythrocytes. Present study has also demonstrated the application of Raman Tweezers spectroscopy as a potential tool for probing red blood cell under different stress conditions.
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Affiliation(s)
- Jijo Lukose
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka-576104., India
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23
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Shaine ML, Premasiri WR, Ingraham HM, Andino R, Lemler P, Brodeur AN, Ziegler LD. Surface enhanced Raman scattering for robust, sensitive detection and confirmatory identification of dried bloodstains. Analyst 2020; 145:6097-6110. [DOI: 10.1039/d0an01132k] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
785 nm SERS spectra provide rapid, sensitive confirmatory identification of dried bloodstains due to a ferric, high spin heme moiety.
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Affiliation(s)
- M. L. Shaine
- Program in Biomedical Forensic Sciences
- Boston University School of Medicine
- Boston
- USA
| | - W. R. Premasiri
- Department of Chemistry
- 590 Commonwealth Ave
- Boston University
- Boston
- USA
| | - H. M. Ingraham
- Department of Chemistry
- 590 Commonwealth Ave
- Boston University
- Boston
- USA
| | - R. Andino
- Department of Chemistry
- 590 Commonwealth Ave
- Boston University
- Boston
- USA
| | - P. Lemler
- Department of Chemistry
- 590 Commonwealth Ave
- Boston University
- Boston
- USA
| | - A. N. Brodeur
- Program in Biomedical Forensic Sciences
- Boston University School of Medicine
- Boston
- USA
| | - L. D. Ziegler
- Department of Chemistry
- 590 Commonwealth Ave
- Boston University
- Boston
- USA
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24
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Jeon HJ, Qureshi MM, Lee SY, Chung E. Optofluidic laser speckle image decorrelation analysis for the assessment of red blood cell storage. PLoS One 2019; 14:e0224036. [PMID: 31639179 PMCID: PMC6805004 DOI: 10.1371/journal.pone.0224036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 10/03/2019] [Indexed: 11/24/2022] Open
Abstract
Red blood cells (RBCs) undergo irreversible biochemical and morphological changes during storage, contributing to the hemorheological changes of stored RBCs, which causes deterioration of microvascular perfusion in vivo. In this study, a home-built optofluidic system for laser speckle imaging of flowing stored RBCs through a transparent microfluidic channel was employed. The speckle decorrelation time (SDT) provides a quantitative measure of RBC changes, including aggregation in the microchannel. The SDT and relative light transmission intensity of the stored RBCs were monitored for 42 days. In addition, correlations between the decorrelation time, RBC flow speed through the channel, and relative light transmission intensity were obtained. The SDT of stored RBCs increased as the storage duration increased. The SDTs of the RBCs stored for 21 days did not significantly change. However, for the RBCs stored for over 35 days, the SDT increased significantly from 1.26 ± 0.27 ms to 6.12 ± 1.98 ms. In addition, we measured the relative light transmission intensity and RBC flow speed. As the RBC storage time increased, the relative light transmission intensity increased, whereas the RBC flow speed decreased in the microchannel. The optofluidic laser speckle image decorrelation time provides a quantitative measure of assessing the RBC condition during storage. Laser speckle image decorrelation analysis may serve as a convenient assay to monitor the property changes of stored RBCs.
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Affiliation(s)
- Hee-Jae Jeon
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea
| | - Muhammad Mohsin Qureshi
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea
| | - Seung Yeob Lee
- Department of Laboratory Medicine, Chonnam National University Hospital, Gwangju, Korea
| | - Euiheon Chung
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea
- * E-mail:
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25
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da Silva WR, Silveira L, Fernandes AB. Diagnosing sickle cell disease and iron deficiency anemia in human blood by Raman spectroscopy. Lasers Med Sci 2019; 35:1065-1074. [PMID: 31637552 DOI: 10.1007/s10103-019-02887-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Accepted: 09/23/2019] [Indexed: 12/18/2022]
Abstract
This work proposed the diagnosis of iron deficiency anemia (IDA) and sickle cell disease (SCD) in human blood caused by iron deficiency and hemoglobin S (HbS), which are among the most common anemias, by means of Raman spectroscopy. Whole blood samples from patients diagnosed with IDA and HbS, as well as from normal subjects (HbA), were obtained and submitted to Raman spectroscopy (830 nm, 150 mW, 400-1800 cm-1 spectral range, 4 cm-1 resolution). Difference spectra of IDA-HbA showed spectral features of hemoglobin with less intensity in the IDA, whereas the difference spectra of SCD-HbA showed spectral features of deoxyhemoglobin increased and of oxyhemoglobin decreased in SCD. An exploratory analysis by principal components analysis (PCA) showed that the peaks referred to oxy- and deoxyhemoglobin markedly differentiated SCD and HbA, as well as the increased amount of hemoglobin features in the SCD group, suggesting increased erythropoiesis. The IDA group showed hemoglobin features with lower intensities as well as peaks referred to the iron bonding to the porphyrin ring with reduced intensities when compared to the HbA. Discriminant analysis based on partial least squares (PLS-DA) and PCA (PCA-DA) showed that the IDA and SCD anemias could be discriminated from the HbA spectra with 95.0% and 93.8% of accuracy, for the PLS and PCA respectively, with sensitivity/specificity of 93.8%/95.7% for the PLS-DA model. The iron depletion and the sickling of erythrocytes could be identified by Raman spectroscopy and a spectral model based on PLS accurately discriminated these IDA and SCD samples from the normal HbA.
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Affiliation(s)
| | - Landulfo Silveira
- Center for Innovation Technology and Education-CITE, Universidade Anhembi Morumbi-UAM, Estr. Dr. Altino Bondensan, 500, São José dos Campos, SP, 12247-016, Brazil.
| | - Adriana Barrinha Fernandes
- Center for Innovation Technology and Education-CITE, Universidade Anhembi Morumbi-UAM, Estr. Dr. Altino Bondensan, 500, São José dos Campos, SP, 12247-016, Brazil
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26
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Gautam R, Xiang Y, Lamstein J, Liang Y, Bezryadina A, Liang G, Hansson T, Wetzel B, Preece D, White A, Silverman M, Kazarian S, Xu J, Morandotti R, Chen Z. Optical force-induced nonlinearity and self-guiding of light in human red blood cell suspensions. LIGHT, SCIENCE & APPLICATIONS 2019; 8:31. [PMID: 30886708 PMCID: PMC6414597 DOI: 10.1038/s41377-019-0142-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 02/21/2019] [Accepted: 02/22/2019] [Indexed: 05/23/2023]
Abstract
Osmotic conditions play an important role in the cell properties of human red blood cells (RBCs), which are crucial for the pathological analysis of some blood diseases such as malaria. Over the past decades, numerous efforts have mainly focused on the study of the RBC biomechanical properties that arise from the unique deformability of erythrocytes. Here, we demonstrate nonlinear optical effects from human RBCs suspended in different osmotic solutions. Specifically, we observe self-trapping and scattering-resistant nonlinear propagation of a laser beam through RBC suspensions under all three osmotic conditions, where the strength of the optical nonlinearity increases with osmotic pressure on the cells. This tunable nonlinearity is attributed to optical forces, particularly the forward-scattering and gradient forces. Interestingly, in aged blood samples (with lysed cells), a notably different nonlinear behavior is observed due to the presence of free hemoglobin. We use a theoretical model with an optical force-mediated nonlocal nonlinearity to explain the experimental observations. Our work on light self-guiding through scattering bio-soft-matter may introduce new photonic tools for noninvasive biomedical imaging and medical diagnosis.
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Affiliation(s)
- Rekha Gautam
- Department of Physics and Astronomy, San Francisco State University, San Francisco, CA 94132 USA
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37240 USA
| | - Yinxiao Xiang
- Department of Physics and Astronomy, San Francisco State University, San Francisco, CA 94132 USA
- MOE Key Lab of Weak-Light Nonlinear Photonics, TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin, 300457 China
| | - Josh Lamstein
- Department of Physics and Astronomy, San Francisco State University, San Francisco, CA 94132 USA
| | - Yi Liang
- Department of Physics and Astronomy, San Francisco State University, San Francisco, CA 94132 USA
- Guangxi Key Lab for Relativistic Astrophysics, Guangxi Colleges and Universities Key Lab of Novel Energy Materials and Related Technology, School of Physical Science and Technology, Guangxi University, Nanning, Guangxi 530004 China
| | - Anna Bezryadina
- Department of Physics and Astronomy, San Francisco State University, San Francisco, CA 94132 USA
- Department of Physics and Astronomy, California State University Northridge, Northridge, CA 91330 USA
| | - Guo Liang
- Department of Physics and Astronomy, San Francisco State University, San Francisco, CA 94132 USA
| | - Tobias Hansson
- Institut National de la Recherche Scientifique, Université du Québec, Varennes, QC J3X 1S2 Canada
- Department of Physics, Chemistry and Biology, Linköping University, Linköping, SE-581 83 Sweden
| | - Benjamin Wetzel
- Institut National de la Recherche Scientifique, Université du Québec, Varennes, QC J3X 1S2 Canada
- School of Mathematical and Physical Sciences, University of Sussex, Sussex House, Falmer, Brighton, BN1 9RH UK
| | - Daryl Preece
- Department of Biomedical Engineering, University of California Irvine, Irvine, CA USA
| | - Adam White
- Department of Physics and Astronomy, San Francisco State University, San Francisco, CA 94132 USA
| | - Matthew Silverman
- Clinical Laboratory Science Program, San Francisco State University, San Francisco, CA 94132 USA
| | - Susan Kazarian
- Clinical Laboratory Science Program, San Francisco State University, San Francisco, CA 94132 USA
| | - Jingjun Xu
- MOE Key Lab of Weak-Light Nonlinear Photonics, TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin, 300457 China
| | - Roberto Morandotti
- Institut National de la Recherche Scientifique, Université du Québec, Varennes, QC J3X 1S2 Canada
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Tech. of China, Chengdu, 610054 China
- ITMO University, Saint Petersburg, 197101 Russia
| | - Zhigang Chen
- Department of Physics and Astronomy, San Francisco State University, San Francisco, CA 94132 USA
- MOE Key Lab of Weak-Light Nonlinear Photonics, TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin, 300457 China
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27
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Gautam R, Oh JY, Patel RP, Dluhy RA. Non-invasive analysis of stored red blood cells using diffuse resonance Raman spectroscopy. Analyst 2018; 143:5950-5958. [PMID: 30035796 PMCID: PMC6279605 DOI: 10.1039/c8an01135d] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A method to acquire the Raman spectra of sub-surface components using diffusely focused radiation in a microscope sampling configuration is described. This procedure generates Raman scattering at various sample depths by producing a converging beam at the back aperture of the objective lens. This method requires illumination of the sample with a defocused laser, while simultaneously increasing the number of CCD pixels that are binned along the spatial axis of the detector. We applied this diffuse sampling method to the analysis of stored red blood cells (RBCs). During storage, biochemical changes to RBCs occur (the "storage lesion"). However, there are no existing non-invasive methods to assess this. We evaluated the instrumental parameters needed to maximize the diffusely scattered signal, including pixel binning, slit width, and bandwidth. We demonstrated the effectiveness of this diffuse resonance Raman spectroscopy (DRRS) method by detecting RBCs through a blood bag segment (1 mm wall thickness). We directly compared the DRRS method to the more common stand-off Raman spectroscopy (SORS) method using both 633 nm and 785 nm excitation. Time-dependent DRRS spectra were used in a multivariate model for classification of RBCs in polymer segments by storage age. Young (6-8 day) RBCs were differentiated from old (35-40) RBCs with 100% sensitivity and 98.5% selectivity. These data indicated that DRRS is a promising, non-invasive technique for acquiring the spectra of sub-surface components, and is particularly applicable when the underlying sample can be resonantly enhanced.
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Affiliation(s)
- Rekha Gautam
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
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28
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Vardaki MZ, Atkins CG, Schulze HG, Devine DV, Serrano K, Blades MW, Turner RFB. Raman spectroscopy of stored red blood cell concentrate within sealed transfusion blood bags. Analyst 2018; 143:6006-6013. [DOI: 10.1039/c8an01509k] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Spectral information relevant to the quality of stored blood can be obtained in situ through sealed blood transfusion bags using a commercially available instrument.
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Affiliation(s)
- M. Z. Vardaki
- Michael Smith Laboratories
- The University of British Columbia
- Vancouver
- Canada V6 T 1Z4
| | - C. G. Atkins
- Michael Smith Laboratories
- The University of British Columbia
- Vancouver
- Canada V6 T 1Z4
- Department of Chemistry
| | - H. G. Schulze
- Michael Smith Laboratories
- The University of British Columbia
- Vancouver
- Canada V6 T 1Z4
| | - D. V. Devine
- Department of Pathology and Laboratory Medicine
- The University of British Columbia
- Vancouver
- Canada V6 T 2B5
- Centre for Blood Research
| | - K. Serrano
- Department of Pathology and Laboratory Medicine
- The University of British Columbia
- Vancouver
- Canada V6 T 2B5
- Centre for Blood Research
| | - M. W. Blades
- Department of Chemistry
- The University of British Columbia
- Vancouver
- Canada V6 T 1Z1
| | - R. F. B. Turner
- Michael Smith Laboratories
- The University of British Columbia
- Vancouver
- Canada V6 T 1Z4
- Department of Chemistry
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