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Wang H, Zhang J, Xu Y, Mi H, Yi S, Gao R, Li X, Li J. Effects of chickpea protein-stabilized Pickering emulsion on the structure and gelling properties of hairtail fish myosin gel. Food Chem 2023; 417:135821. [PMID: 36934711 DOI: 10.1016/j.foodchem.2023.135821] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 02/14/2023] [Accepted: 02/27/2023] [Indexed: 03/09/2023]
Abstract
The effects of different amount (0-12%) of chickpea protein-stabilized Pickering emulsion (CPE) on the gelling properties, intermolecular interactions, microstructure, and physicochemical stability of hairtail fish myosin gels were investigated. The myosin gel with 6%-9% CPE demonstrated significantly higher viscoelasticity, gel strength, hardness, water-holding capacity and whiteness, compared to the control (P < 0.05). In addition, Raman spectroscopy showed that CPE changed the microenvironment of the myosin, which promoted the changes in protein secondary structures, disulfide bond conformation and the local environments of the composite gels. The addition of 6%-9% CPE also enhanced the disulfide bond and hydrophobic interaction of myosin gels which induced more compact gel network structures. Furthermore, CPE improved the lipid oxidative stability and freeze-thaw stability of myosin gel. The results indicated that CPE could improve the gelling properties of myosin, making it a potential new additive and lipid substitute for the development of new emulsion gel products.
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Affiliation(s)
- Huinan Wang
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Jiaxin Zhang
- College of Food Science and Technology, Bohai University, National R&D Branch Center of Surimi and Surimi Products Processing, Jinzhou, 121013, China
| | - Yongxia Xu
- College of Food Science and Technology, Bohai University, National R&D Branch Center of Surimi and Surimi Products Processing, Jinzhou, 121013, China
| | - Hongbo Mi
- College of Food Science and Technology, Bohai University, National R&D Branch Center of Surimi and Surimi Products Processing, Jinzhou, 121013, China
| | - Shumin Yi
- College of Food Science and Technology, Bohai University, National R&D Branch Center of Surimi and Surimi Products Processing, Jinzhou, 121013, China
| | - Ruichang Gao
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China
| | - Xuepeng Li
- College of Food Science and Technology, Bohai University, National R&D Branch Center of Surimi and Surimi Products Processing, Jinzhou, 121013, China.
| | - Jianrong Li
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China; College of Food Science and Technology, Bohai University, National R&D Branch Center of Surimi and Surimi Products Processing, Jinzhou, 121013, China.
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Preliminary Investigation on the Relationship between Raman Spectra of Beef and Metmyoglobin and Metmyoglobin Reductase Activity. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:4117261. [PMID: 36277003 PMCID: PMC9584682 DOI: 10.1155/2022/4117261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/07/2022] [Accepted: 09/19/2022] [Indexed: 11/23/2022]
Abstract
A hand-held Raman spectroscopic device was used as a rapid nondestructive testing device to predict the metmyoglobin (MetMb) and metmyoglobin reductase activity (MRA) values on the surface layer of fresh beef. Longissimus dorsi muscles were from 10 young bulls (Holstein-Friesian) from two different cattle farms (group A = 5 and B = 5). The Raman spectra of 100 samples were correlated with the MetMb and MRA values using partial least squares regression (PLSR). Two groups could be discriminated, and the separate correlation models were better than the joint correlation model for the fresh beef. The coefficients of determination are R2 = 0.81 (group A) and R2 = 0.87 (group B) for MetMb and R2 = 0.80 (group A) and R2 = 0.85 (group B) for MRA. The results show the usefulness of Raman spectra in predicting the inner traits such as MetMb and MRA during meat storage. In conclusion, it is feasible to determine the MetMb and MRA values by Raman spectroscopy. Color is an important indicator of beef freshness and can vary depending on the age, sex, and breed of the cow. They play a very important role in human nutrition. The color of meat is an important indicator of meat freshness, and many researchers are already investigating the causes of color changes. The research was conducted in this environment.
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Huang JY, Jones OG, Zhang BY. Interactions of Casein and Carrageenan with Whey during Pasteurization and Their Effects on Protein Deposition. FOOD AND BIOPRODUCTS PROCESSING 2022. [DOI: 10.1016/j.fbp.2022.06.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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4
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Insight into the mechanism of myosin-fibrin gelation induced by non-disulfide covalent cross-linking. Food Res Int 2022; 156:111168. [DOI: 10.1016/j.foodres.2022.111168] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 03/15/2022] [Accepted: 03/16/2022] [Indexed: 11/19/2022]
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5
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Gieroba B, Sroka-Bartnicka A, Kazimierczak P, Kalisz G, Lewalska-Graczyk A, Vivcharenko V, Nowakowski R, Pieta IS, Przekora A. Spectroscopic studies on the temperature-dependent molecular arrangements in hybrid chitosan/1,3-β-D-glucan polymeric matrices. Int J Biol Macromol 2020; 159:911-921. [PMID: 32445816 DOI: 10.1016/j.ijbiomac.2020.05.155] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 05/16/2020] [Accepted: 05/18/2020] [Indexed: 12/14/2022]
Abstract
Chitosan/1,3-β-D-glucan matrices have been recently used in various biomedical applications. Within this study, the structural changes in hybrid polysaccharide chitosan/1,3-β-D-glucan matrices cross-linked at 70 °C and 80 °C were detected with Attenuated Total Reflection Fourier Transform Infrared spectroscopy (ATR FT-IR) and Raman spectroscopy enabled thorough insights into molecular structure of studied biomaterials, whereas X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) provided their surface characteristics with confirmation of their effective and non-destructive properties. There are temperature-dependent differences in the chemical interactions between 1,3-β-D-glucan units and N-glucosamine in chitosan, resulting in surface polarity changes. The second order derivatives and deconvolution revealed the alterations in the secondary structure of studied matrices, along with different sized grain-like structures revealed by AFM. Since surface physicochemical properties of biomaterials have great impact on cell behavior, abovementioned techniques may allow to optimize and modify the preparation of polymeric matrices with desired features.
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Affiliation(s)
- Barbara Gieroba
- Department of Biopharmacy, Medical University of Lublin, Chodzki 4a, 20-093 Lublin, Poland
| | - Anna Sroka-Bartnicka
- Department of Biopharmacy, Medical University of Lublin, Chodzki 4a, 20-093 Lublin, Poland; Department of Genetics and Microbiology, Maria Curie-Sklodowska University, Akademicka 19, 20-033 Lublin, Poland.
| | - Paulina Kazimierczak
- Chair and Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodzki 1, 20-093 Lublin, Poland
| | - Grzegorz Kalisz
- Department of Biopharmacy, Medical University of Lublin, Chodzki 4a, 20-093 Lublin, Poland
| | - Agnieszka Lewalska-Graczyk
- Institute of Physical Chemistry Polish Academy of Sciences, ul. Marcina Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Vladyslav Vivcharenko
- Chair and Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodzki 1, 20-093 Lublin, Poland
| | - Robert Nowakowski
- Institute of Physical Chemistry Polish Academy of Sciences, ul. Marcina Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Izabela S Pieta
- Institute of Physical Chemistry Polish Academy of Sciences, ul. Marcina Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Agata Przekora
- Chair and Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodzki 1, 20-093 Lublin, Poland.
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Gaifulina R, Maher AT, Kendall C, Nelson J, Rodriguez-Justo M, Lau K, Thomas GM. Label-free Raman spectroscopic imaging to extract morphological and chemical information from a formalin-fixed, paraffin-embedded rat colon tissue section. Int J Exp Pathol 2016; 97:337-350. [PMID: 27581376 PMCID: PMC5061758 DOI: 10.1111/iep.12194] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 05/04/2016] [Indexed: 12/19/2022] Open
Abstract
Animal models and archived human biobank tissues are useful resources for research in disease development, diagnostics and therapeutics. For the preservation of microscopic anatomical features and to facilitate long-term storage, a majority of tissue samples are denatured by the chemical treatments required for fixation, paraffin embedding and subsequent deparaffinization. These aggressive chemical processes are thought to modify the biochemical composition of the sample and potentially compromise reliable spectroscopic examination useful for the diagnosis or biomarking. As a result, spectroscopy is often conducted on fresh/frozen samples. In this study, we provide an extensive characterization of the biochemical signals remaining in processed samples (formalin fixation and paraffin embedding, FFPE) and especially those originating from the anatomical layers of a healthy rat colon. The application of chemometric analytical methods (unsupervised and supervised) was shown to eliminate the need for tissue staining and easily revealed microscopic features consistent with goblet cells and the dense populations of cells within the mucosa, principally via strong nucleic acid signals. We were also able to identify the collagenous submucosa- and serosa- as well as the muscle-associated signals from the muscular regions and blood vessels. Applying linear regression analysis to the data, we were able to corroborate this initial assignment of cell and tissue types by confirming the biological origin of each layer by reference to a subset of authentic biomolecular standards. Our results demonstrate the potential of using label-free Raman microspectroscopy to obtain superior imaging contrast in FFPE sections when compared directly to conventional haematoxylin and eosin (H&E) staining.
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Affiliation(s)
- Riana Gaifulina
- Department of Cell and Developmental Biology, University College London, London, UK
| | - Andrew Thomas Maher
- Department of Cell and Developmental Biology, University College London, London, UK
- CoMPLEX, University College London, London, UK
| | - Catherine Kendall
- Biophotonics Research Unit, Gloucestershire Royal Hospital, Gloucester, UK
| | - James Nelson
- Department of Statistical Science, University College London, London, UK
| | | | - Katherine Lau
- Spectroscopy Products Division, Renishaw Plc, Wotton-under-Edge, UK
| | - Geraint Mark Thomas
- Department of Cell and Developmental Biology, University College London, London, UK.
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7
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Harris M, Cilwa K, Elster EA, Potter BK, Forsberg JA, Crane NJ. Pilot study for detection of early changes in tissue associated with heterotopic ossification: moving toward clinical use of Raman spectroscopy. Connect Tissue Res 2015; 56:144-52. [PMID: 25738521 DOI: 10.3109/03008207.2015.1013190] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Over 60% of combat-wounded patients develop heterotopic ossification (HO). Nearly 33% of them require surgical excision for symptomatic lesions, a procedure that is both fraught with complications and can delay or regress functional rehabilitation. Relative medical contraindications limit widespread use of conventional means of primary prophylaxis, such as nonspecific nonsteroidal anti-inflammatory medications and radiotherapy. Better methods for risk stratification are needed to both mitigate the risk of current means of primary prophylaxis as well as to evaluate novel preventive strategies currently in development. We asked whether Raman spectral changes, measured ex vivo, could be associated with histologic evidence of the earliest signs of HO formation and substance P (SP) expression in tissue biopsies from the wounds of combat casualties. In this pilot study, we compared normal muscle tissue, injured muscle tissue, very early HO lesions (< 16 d post-injury), early HO lesions (> 16 d post-injury) and mature HO lesions. The Raman spectra of these tissues demonstrate clear differences in the Amide I and III spectral regions of HO lesions compared to normal tissue, denoted by changes in the Amide I band center (p < 0.01) and the 1340/1270 cm(-1) (p < 0.05) band area and band height ratios. SP expression in the HO lesions appears to peak between 16 and 30 d post-injury, as determined by SP immunohistochemistry of corresponding tissue sections, potentially indicating optimal timing for administration of therapeutics. Raman spectroscopy may therefore prove a useful, non-invasive and early diagnostic modality to detect HO formation before it becomes evident either clinically or radiographically.
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Affiliation(s)
- Mitchell Harris
- Department of Surgery, Uniformed Services University of Health Science , Bethesda, MD , USA
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9
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Crane NJ, Polfer E, Elster EA, Potter BK, Forsberg JA. Raman spectroscopic analysis of combat-related heterotopic ossification development. Bone 2013; 57:335-42. [PMID: 24012700 DOI: 10.1016/j.bone.2013.08.026] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 08/21/2013] [Accepted: 08/23/2013] [Indexed: 11/17/2022]
Abstract
Over 60% of our severely combat-injured patient population develops radiographically apparent heterotopic ossification. Nearly a third of these require surgical excision of symptomatic lesions, a procedure that is fraught with complications, and delays or regresses functional rehabilitation in many cases. Unfortunately, for the combat injured, medical contraindications and logistical limitations limit widespread use of conventional means of primary prophylaxis. Better means of risk stratification are needed to both mitigate the risk of current means of primary prophylaxis as well as to evaluate novel preventive strategies currently in development. We asked whether Raman spectral changes, measured ex vivo, correlated with histologic evidence of the earliest signs of HO formation using tissue biopsies from the wounds of combat casualties. In doing so, we compared normal muscle tissue to injured muscle tissue, unmineralized HO tissue, and mineralized HO tissue. The Raman spectra of these tissues demonstrate clear differences in the amide I and amide III spectral regions of HO tissue compared to normal tissue, denoted by changes in the 1640/1445cm(-1)(p<0.01), and 1340/1270cm(-1) (p<0.01) band area ratios (BARs). Additionally, analysis of the bone mineral in HO by Raman spectroscopy appears capable of determining bone maturity by measuring both the 945/960cm(-1) and the 1070/1445cm(-1) BARs. Raman may therefore prove a useful, non-invasive, and early diagnostic modality to detect HO formation prior to it becoming evident clinically or radiographically. This technique could ostensibly be utilized as a non-invasive means to risk stratify individual wounds at a time thought to be amenable to various means of primary prophylaxis.
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Affiliation(s)
- Nicole J Crane
- Department of Regenerative Medicine, Naval Medical Research Center, Silver Spring, MD, USA; Department of Surgery, Uniformed Services University of Health Science, Bethesda, MD, USA.
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10
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Schmidt H, Scheier R, Hopkins DL. Preliminary investigation on the relationship of Raman spectra of sheep meat with shear force and cooking loss. Meat Sci 2013; 93:138-43. [DOI: 10.1016/j.meatsci.2012.08.019] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2011] [Revised: 05/03/2012] [Accepted: 08/23/2012] [Indexed: 10/28/2022]
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11
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Schmidt H, Sowoidnich K, Kronfeldt HD. A prototype hand-held Raman sensor for the in situ characterization of meat quality. APPLIED SPECTROSCOPY 2010; 64:888-894. [PMID: 20719051 DOI: 10.1366/000370210792081028] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
As a tool for the in situ characterization of meat quality, a hand-held Raman sensor head using an excitation wavelength of 671 nm was developed. A microsystem-based external cavity diode laser module was integrated into the sensor head and attached to a Raman probe, which is equipped with lens optics for excitation and signal collection as well as a Raman filter stage for Rayleigh rejection. The Raman signal was guided by an optical fiber to the detection unit, which was in the initial phase a laboratory spectrometer with a charge-coupled device (CCD) detector. The laser and the sensor head were characterized in terms of stability and performance for in situ Raman investigations. Raman spectra of meat were obtained with 35 mW within 5 seconds or less, ensuring short measuring times for the hand-held device. In a series of measurements with raw and packaged pork meat, the Raman sensor head was shown to detect microbial spoilage on the meat surface, even through the packaging foil.
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Affiliation(s)
- Heinar Schmidt
- Technische Universität Berlin, Institut für Optik und Atomare Physik, Hardenbergstr. 36, D-10623 Berlin, Germany.
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12
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Application of Diode-Laser Raman Spectroscopy for In situ Investigation of Meat Spoilage. FOOD BIOPROCESS TECH 2010. [DOI: 10.1007/s11947-010-0360-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Herrero AM. Raman spectroscopy for monitoring protein structure in muscle food systems. Crit Rev Food Sci Nutr 2008; 48:512-23. [PMID: 18568857 DOI: 10.1080/10408390701537385] [Citation(s) in RCA: 217] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Raman spectroscopy offers structural information about complex solid systems such as muscle food proteins. This spectroscopic technique is a powerful and a non-invasive method for the study of protein changes in secondary structure, mainly quantified, analysing the amide I (1650-1680 cm(- 1)) and amide III (1200-1300 cm(- 1)) regions and C-C stretching band (940 cm(- 1)), as well as modifications in protein local environments (tryptophan residues, tyrosil doublet, aliphatic aminoacids bands) of muscle food systems. Raman spectroscopy has been used to determine structural changes in isolated myofibrillar and connective tissue proteins by the addition of different compounds and by the effect of the conservation process such as freezing and frozen storage. It has been also shown that Raman spectroscopy is particularly useful for monitoring in situ protein structural changes in muscle food during frozen storage. Besides, the possibilities of using protein structural changes of intact muscle to predict the protein functional properties and the sensory attributes of muscle foods have been also investigated. In addition, the application of Raman spectroscopy to study changes in the protein structure during the elaboration of muscle food products has been demonstrated.
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Affiliation(s)
- Ana M Herrero
- Departamento Nutrición, Bromatologia y Tecnologia de los Alimentos, Facultad de Veterinaria, Universidad Complutense, Madrid, Spain.
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Herrero A, Cambero M, Ordóñez J, de la Hoz L, Carmona P. Raman spectroscopy study of the structural effect of microbial transglutaminase on meat systems and its relationship with textural characteristics. Food Chem 2008; 109:25-32. [DOI: 10.1016/j.foodchem.2007.12.003] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2007] [Revised: 11/07/2007] [Accepted: 12/04/2007] [Indexed: 10/22/2022]
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Inya-Agha O, Klauke N, Davies T, Smith G, Cooper JM. Spectroscopic Probing of Dynamic Changes during Stimulation and Cell Remodeling in the Single Cardiac Myocyte. Anal Chem 2007; 79:4581-7. [PMID: 17511420 DOI: 10.1021/ac0622476] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Optical microscopy, involving both fluorescence imaging and confocal Raman microspectroscopy, was used to visualize single, isolated, electrically active heart muscle cells. For example, short-term, dynamic changes in Raman bands during the contraction cycle, as well as persistent band changes during structural remodeling (microscopic rearrangements of cellular structures) in culture over longer periods of time, were obtained from the cellular content (sarcoplasm) of the heart cells. The results of the short-term studies, collected during electrical stimulation, showed dynamic changes in the Raman amide I band intensity, which occurred in phase with changes in cell length during cardiomyocyte contraction. The longer term studies of quiescent cardiomyocytes in culture over 3 days revealed a progressive and sustained increase in the intensity of the amide I band. Over the same period of culture, a decrease in the number of t-tubules (invaginations of the cell membrane, sarcolemma, which ensure the spreading of the action potential into the bulk of the sarcoplasm) was observed using confocal z-sections of the fluorescently labeled sarcolemma. The ability to measure both short-term dynamic changes associated with stimulated contraction and longer term persistent remodeling in the structure of intracellular macromolecules is valuable for assessing the physiological state of the cell, in real time.
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Affiliation(s)
- O Inya-Agha
- Department of Electronics, University of Glasgow, Glasgow G12 8LT, Scotland
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Koljenović S, Bakker Schut TC, Wolthuis R, de Jong B, Santos L, Caspers PJ, Kros JM, Puppels GJ. Tissue characterization using high wave number Raman spectroscopy. JOURNAL OF BIOMEDICAL OPTICS 2005; 10:031116. [PMID: 16229641 DOI: 10.1117/1.1922307] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Raman spectroscopy is a powerful diagnostic tool, enabling tissue identification and classification. Mostly, the so-called fingerprint (approximately 400-1800 cm(-1)) spectral region is used. In vivo application often requires small flexible fiber-optic probes, and is hindered by the intense Raman signal that is generated in the fused silica core of the fiber. This necessitates filtering of laser light, which is guided to the tissue, and of the scattered light collected from the tissue, leading to complex and expensive designs. Fused silica has no Raman signal in the high wave number region (2400-3800 cm(-1)). This enables the use of a single unfiltered fiber to guide laser light to the tissue and to collect scattered light in this spectral region. We show, by means of a comparison of in vitro Raman microspectroscopic maps of thin tissue sections (brain tumors, bladder), measured both in the high wave number region and in the fingerprint region, that essentially the same diagnostic information is obtained in the two wave number regions. This suggests that for many clinical applications the technological hurdle of designing and constructing suitable fiber-optic probes may be eliminated by using the high wave number region and a simple piece of standard optical fiber.
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Affiliation(s)
- S Koljenović
- Erasmus Medical Center, Center for Optical Diagnostics and Therapy, Rotterdam, The Netherlands
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Koljenović S, Bakker Schut TC, van Meerbeeck JP, Maat APWM, Burgers SA, Zondervan PE, Kros JM, Puppels GJ. Raman microspectroscopic mapping studies of human bronchial tissue. JOURNAL OF BIOMEDICAL OPTICS 2004; 9:1187-1197. [PMID: 15568939 DOI: 10.1117/1.1805555] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Characterization of the biochemical composition of normal bronchial tissue is a prerequisite for understanding the biochemical changes that accompany histological changes during lung cancer development. In this study, 12 Raman microspectroscopic mapping experiments are performed on frozen sections of normal bronchial tissue. Pseudocolor Raman images are constructed using principal component analysis and K-means cluster analysis. Subsequent comparison of Raman images with histologic evaluation of stained sections enables the identification of the morphologic origin (e.g., bronchial mucus, epithelium, fibrocollagenous stroma, smooth muscle, glandular tissue, and cartilage) of the spectral features. Raman spectra collected from the basal side of epithelium consistently show higher DNA contributions and lower lipid contributions when compared with superficial epithelium spectra. Spectra of bronchial mucus reveal a strong signal contribution of lipids, predominantly triolein. These spectra are almost identical to the spectra obtained from submucosal glands, which suggests that the bronchial mucus is mainly composed of gland secretions. Different parts of fibrocollagenous tissue are distinguished by differences in spectral contributions from collagen and actin/myosin. Cartilage is identified by spectral contributions of glycosaminoglycans and collagen. As demonstrated here, in situ analysis of the molecular composition of histologic structures by Raman microspectroscopic mapping creates powerful opportunities for increasing our fundamental understanding of tissue organization and function. Moreover, it provides a firm basis for further in vitro and in vivo investigations of the biochemical changes that accompany pathologic transformation of tissue.
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Affiliation(s)
- Senada Koljenović
- Erasmus Medical Center Rotterdam, Department of General Surgery, Laboratory of Intensive Care Research and Optical Spectroscopy, Rotterdam, The Netherlands
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18
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Ikeda S, Li-Chan EC. Raman spectroscopy of heat-induced fine-stranded and particulate β-lactoglobulin gels. Food Hydrocoll 2004. [DOI: 10.1016/j.foodhyd.2003.07.003] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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19
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Ikeda S. Heat-induced gelation of whey proteins observed by rheology, atomic force microscopy, and Raman scattering spectroscopy. Food Hydrocoll 2003. [DOI: 10.1016/s0268-005x(03)00033-x] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Ogawa M, Nakamura S, Horimoto Y, An H, Tsuchiya T, Nakai S. Raman spectroscopic study of changes in fish actomyosin during setting. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 1999; 47:3309-3318. [PMID: 10552651 DOI: 10.1021/jf9813079] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Actomyosins (AMs) isolated from tilapia, lemon sole, ling cod, and rock fish were heated at 40 degrees C, and structural changes in AMs were investigated using Raman spectroscopy to elucidate low-temperature gelling phenomenon, that is, "setting", of surimi. The following conformational transitions were observed in lemon sole, ling cod, and rock fish gels during setting: a slow unfolding of alpha-helix and exposure of hydrophobic amino acid residues occurring in long-time incubation at 40 degrees C, thereby forming hydrophobic interactions among AM molecules. In addition, the most frequent conformation in disulfide bonds was gauche-gauche-trans (g-g-t) form in the set gel. On the other hand, tilapia AM did not form a gel with heating at 40 degrees C, its alpha-helical structure in the myosin being far more stable than that of the other species. The heat resistance of the tight alpha-helix may prevent the gelation of tilapia AM. It is, therefore, likely that the unfolding of the alpha-helix of myosin is a prerequisite for gelation of AM during setting.
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Affiliation(s)
- M Ogawa
- Food, Nutrition and Health, Faculty of Agricultural Sciences, University of British Columbia, Vancouver, Canada
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21
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Pézolet M, Pigeon M, Ménard D, Caillé JP. Raman spectroscopy of cytoplasmic muscle fiber proteins. Orientational order. Biophys J 1988; 53:319-25. [PMID: 3349128 PMCID: PMC1330200 DOI: 10.1016/s0006-3495(88)83109-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
The polarized Raman spectra of glycerinated and intact single muscle fibers of the giant barnacle were obtained. These spectra show that the conformation-sensitive amide I, amide III, and C-C stretching vibrations give Raman bands that are stronger when the electric field of both the incident and scattered radiation is parallel to the fiber axis (Izz). The detailed analysis of the amide I band by curve fitting shows that approximately 50% of the alpha-helical segments of the contractile proteins are oriented along the fiber axis, which is in good agreement with the conformation and composition of muscle fiber proteins. Difference Raman spectroscopy was also used to highlight the Raman bands attributed to the oriented segments of the alpha-helical proteins. The difference spectrum, which is very similar to the spectrum of tropomyosin, displays amide I and amide III bands at 1,645 and 1,310 cm-1, respectively, the bandwidth of the amide I line being characteristic of a highly alpha-helical biopolymer with a small dispersion of dihedral angles. A small dichroic effect was also observed for the band due to the CH2 bending mode at 1,450 cm-1 and on the 1,340 cm-1 band. In the C-C stretching mode region, two bands were detected at 902 and 938 cm-1 and are both assigned to the alpha-helical conformation.
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Affiliation(s)
- M Pézolet
- Département de Chimie, Faculté des Sciences et de Génie, Université Laval, Sainte-Foy, Québec, Canada
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