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Synytsya A, Janstová D, Šmidová M, Synytsya A, Petrtýl J. Evaluation of IR and Raman spectroscopic markers of human collagens: Insides for indicating colorectal carcinogenesis. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 296:122664. [PMID: 36996519 DOI: 10.1016/j.saa.2023.122664] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 02/26/2023] [Accepted: 03/21/2023] [Indexed: 06/19/2023]
Abstract
Vibrational spectroscopic methods are widely used in the molecular diagnostics of carcinogenesis. Collagen, a component of connective tissue, plays a special role as a biochemical marker of pathological changes in tissues. The vibrational bands of collagens are very promising to distinguish between normal colon tissue, benign and malignant colon polyps. Differences in these bands indicate changes in the amount, structure, conformation and the ratio between the individual structural forms (subtypes) of this protein. The screening of specific collagen markers of colorectal carcinogenesis was carried out based on the FTIR and Raman (λex 785 nm) spectra of colon tissue samples and purified human collagens. It was found that individual types of human collagens showed significant differences in their vibrational spectra, and specific spectral markers were found for them. These collagen bands were assigned to specific vibrations in the polypeptide backbone, amino acid side chains and carbohydrate moieties. The corresponding spectral regions for colon tissues and colon polyps were investigated for the contribution of collagen vibrations. Mentioned spectral differences in collagen spectroscopic markers could be of interest for early ex vivo diagnosis of colorectal carcinoma if combine vibrational spectroscopy and colonoscopy.
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Affiliation(s)
- Alla Synytsya
- Department of Analytical Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic.
| | - Daniela Janstová
- Department of Analytical Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Miroslava Šmidová
- Department of Analytical Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Andriy Synytsya
- Department of Carbohydrates and Cereals, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Jaromír Petrtýl
- 4th Internal Clinic-Gastroenterology and Hepatology, 1(st) Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, U Nemocnice 2, 128 00 Prague 2, Czech Republic
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Leskovar T, Zupanič Pajnič I, Jerman I. Dealing with minor differences in bone matrix: can spectra follow the DNA preservation? AUST J FORENSIC SCI 2021. [DOI: 10.1080/00450618.2021.1948102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Tamara Leskovar
- Centre for Interdisciplinary Research in Archaeology, Department of Archaeology, Faculty of Arts, University of Ljubljana, Ljubljana, Slovenia
| | - Irena Zupanič Pajnič
- Institute of Forensic Medicine, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Ivan Jerman
- Department for Materials Chemistry, National Institute of Chemistry, Ljubljana, Slovenia
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Bakir G, Girouard BE, Wiens R, Mastel S, Dillon E, Kansiz M, Gough KM. Orientation Matters: Polarization Dependent IR Spectroscopy of Collagen from Intact Tendon Down to the Single Fibril Level. Molecules 2020; 25:molecules25184295. [PMID: 32961663 PMCID: PMC7571167 DOI: 10.3390/molecules25184295] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 09/04/2020] [Accepted: 09/17/2020] [Indexed: 01/30/2023] Open
Abstract
Infrared (IR) spectroscopy has been used for decades to study collagen in mammalian tissues. While many changes in the spectral profiles appear under polarized IR light, the absorption bands are naturally broad because of tissue heterogeneity. A better understanding of the spectra of ordered collagen will aid in the evaluation of disorder in damaged collagen and in scar tissue. To that end, collagen spectra have been acquired with polarized far-field (FF) Fourier Transform Infrared (FTIR) imaging with a Focal Plane Array detector, with the relatively new method of FF optical photothermal IR (O-PTIR), and with nano-FTIR spectroscopy based on scattering-type scanning near-field optical microscopy (s-SNOM). The FF methods were applied to sections of intact tendon with fibers aligned parallel and perpendicular to the polarized light. The O-PTIR and nano-FTIR methods were applied to individual fibrils of 100–500 nm diameter, yielding the first confirmatory and complementary results on a biopolymer. We observed that the Amide I and II bands from the fibrils were narrower than those from the intact tendon, and that both relative intensities and band shapes were altered. These spectra represent reliable profiles for normal collagen type I fibrils of this dimension, under polarized IR light, and can serve as a benchmark for the study of collagenous tissues.
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Affiliation(s)
- Gorkem Bakir
- Department of Chemistry, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; (G.B.); (B.E.G.); (R.W.)
| | - Benoit E. Girouard
- Department of Chemistry, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; (G.B.); (B.E.G.); (R.W.)
| | - Richard Wiens
- Department of Chemistry, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; (G.B.); (B.E.G.); (R.W.)
| | - Stefan Mastel
- neaspec GmbH, Eglfinger Weg 2, 85540 Munich-Haar, Germany;
| | - Eoghan Dillon
- Photothermal Spectroscopy Corp., 325 Chapala St, Santa Barbara, CA 93101, USA; (E.D.); (M.K.)
| | - Mustafa Kansiz
- Photothermal Spectroscopy Corp., 325 Chapala St, Santa Barbara, CA 93101, USA; (E.D.); (M.K.)
| | - Kathleen M. Gough
- Department of Chemistry, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; (G.B.); (B.E.G.); (R.W.)
- Correspondence:
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Lorenz L, Kusebauch U, Moroder L, Wachtveitl J. Temperature- and Photocontrolled Unfolding/Folding of a Triple-Helical Azobenzene-Stapled Collagen Peptide Monitored by Infrared Spectroscopy. Chemphyschem 2016; 17:1314-20. [DOI: 10.1002/cphc.201501103] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 01/22/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Lisa Lorenz
- Institute of Physical and Theoretical Chemistry; Goethe University Frankfurt; Max-von-Laue-Str. 7 60438 Frankfurt Germany
- Institute of Biophysics; Goethe University Frankfurt; Max-von-Laue-Str. 1 60438 Frankfurt Germany
| | - Ulrike Kusebauch
- Max-Planck-Institute for Biochemistry; Am Klopferspitz 18a 85152 Martinsried Germany
- Institute for Systems Biology; 401 Terry Ave North Seattle Washington 98109 USA
| | - Luis Moroder
- Max-Planck-Institute for Biochemistry; Am Klopferspitz 18a 85152 Martinsried Germany
| | - Josef Wachtveitl
- Institute of Physical and Theoretical Chemistry; Goethe University Frankfurt; Max-von-Laue-Str. 7 60438 Frankfurt Germany
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Diaconescu R, Simionescu BC, David G. Control and prediction of degradation of biopolymer based hydrogels with poly(ɛ-caprolactone) subunits. Int J Biol Macromol 2014; 71:147-54. [DOI: 10.1016/j.ijbiomac.2014.04.053] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 04/04/2014] [Accepted: 04/25/2014] [Indexed: 11/15/2022]
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6
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Liu H, Jiao Z, Guo S. Effect of Epigallocatechin Gallate on the Properties of Gelatin. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2014. [DOI: 10.1080/10942912.2013.784329] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Balhui C, David G, Drobota M, Musteata VE. Dielectric Characterization of Biopolymer/Poly(ϵ-Caprolactone) Hydrogels. INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION 2014. [DOI: 10.1080/1023666x.2014.879632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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8
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Potential application of Raman spectroscopy for determining burial duration of skeletal remains. Anal Bioanal Chem 2011; 401:2511-8. [DOI: 10.1007/s00216-011-5338-z] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2011] [Revised: 08/11/2011] [Accepted: 08/14/2011] [Indexed: 01/25/2023]
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Chys P, Gielens C, Meersman F. FTIR 2D correlation spectroscopy of α1 and α2 fractions of an alkali-pretreated gelatin. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2011; 1814:318-25. [DOI: 10.1016/j.bbapap.2010.10.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2010] [Revised: 09/24/2010] [Accepted: 10/04/2010] [Indexed: 10/19/2022]
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Affiliation(s)
- E P Paschalis
- Ludwig Boltzmann Institute of Osteology, Hanusch Hospital of WGKK and AUVA Trauma Centre Meidling, 4th Medical Department, Hanusch Hospital, 1140 Vienna, Austria.
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Ohkawa K, Hayashi S, Kameyama N, Yamamoto H, Yamaguchi M, Kimoto S, Kurata S, Shinji H. Synthesis of Collagen-Like Sequential Polypeptides Containing O
-Phospho-L
-Hydroxyproline and Preparation of Electrospun Composite Fibers for Possible Dental Application. Macromol Biosci 2008; 9:79-92. [DOI: 10.1002/mabi.200800122] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Srivastava S, Srivastava S, Srivastava S, Shukla M, Gupta VD. Vibrational Dynamics ofl‐Proline‐l‐Hydroxyproline: A Fragment of Collagen. J MACROMOL SCI B 2008. [DOI: 10.1080/00222340802118259] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
| | | | | | - Monika Shukla
- b Department of Physics , Integral University , Lucknow, India
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Rocha-Mendoza I, Yankelevich DR, Wang M, Reiser KM, Frank CW, Knoesen A. Sum frequency vibrational spectroscopy: the molecular origins of the optical second-order nonlinearity of collagen. Biophys J 2007; 93:4433-44. [PMID: 17766339 PMCID: PMC2098726 DOI: 10.1529/biophysj.107.111047] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2007] [Accepted: 08/14/2007] [Indexed: 11/18/2022] Open
Abstract
The molecular origins of second-order nonlinear effects in type I collagen fibrils have been identified with sum-frequency generation vibrational spectroscopy. The dominant contributing molecular groups are: 1), the methylene groups associated with a Fermi resonance between the fundamental symmetric stretch and the bending overtone of methylene; and 2), the carbonyl and peptide groups associated with the amide I band. The noncentrosymmetrically aligned methylene groups are characterized by a distinctive tilt relative to the axis perpendicular to the main axis of the collagen fiber, a conformation producing a strong achiral contribution to the second-order nonlinear effect. In contrast, the stretching vibration of the carbonyl groups associated with the amide I band results in a strong chiral contribution to the optical second-order nonlinear effect. The length scale of these chiral effects ranges from the molecular to the supramolecular.
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Affiliation(s)
- Israel Rocha-Mendoza
- Department of Electrical and Computer Engineering, University of California, Davis, California, USA
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Southern D, Lutz G, Bracilovic A, West P, Spevak M, Camacho NP, Doty S. Histological and molecular structure characterization of annular collagen after intradiskal electrothermal annuloplasty. HSS J 2006; 2:49-54. [PMID: 18751846 PMCID: PMC2504111 DOI: 10.1007/s11420-005-0126-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The mechanism of pain relief of intradiskal electrothermal annuloplasty (IDET) in the treatment of lumbar diskogenic pain is uncertain. Theories include sealing of annular fissures via collagen denaturation and contraction. Prior studies offer conflicting qualitative data on the ability of IDET to denature collagen. The objective of the present study is to evaluate IDET treatment effect on annular collagen using quantitative data supplied by Fourier-transform infrared imaging spectroscopy. The posterior annulus of disks (n = 3) from an intact human cadaveric spine at room temperature were treated with two different radiothermal catheters using standard intradiskal electrothermal annuloplasty (IDET) heating protocols. Disks were dissected free with catheters in place and fixed in formalin. Channels created by the catheters were marked and catheters were removed. Tissue samples of treated areas adjacent to the channels and internal control areas from the same disk were stained for light microscopy and placed on barium sulfate windows for Fourier transform infrared imaging spectroscopy (FT-IRIS) analysis. Treated areas showed evidence of disruption in the fibrillar organization of annular collagen by light microscopy compared to intact stroma from control areas. Quantitative FT-IRIS analysis compared ratios of wavenumber regions known to be sensitive to collagen denaturation. Mean values for the ratios amide II/1,338 cm(-1) (137.21 +/- 25.84 treated, 76.94 +/- 16.77 control) and 1,640/1,660 cm(-1) (0.98 +/- 0.03 treated, 0.89 +/- 0.03 control) were significantly different between treated and control samples (p < 0.001), indicating a breakdown in collagen integrity. Separate analysis by catheter type suggests that catheter design may impact treatment effect.
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Affiliation(s)
- Daniel Southern
- Physiatry Department, Hospital for Special Surgery, 535 East 70th Street, New York, NY 10021 USA
| | - Gregory Lutz
- Physiatry Department, Hospital for Special Surgery, 535 East 70th Street, New York, NY 10021 USA
| | - Ana Bracilovic
- Physiatry Department, Hospital for Special Surgery, 535 East 70th Street, New York, NY 10021 USA
| | - Paul West
- Research Division, Mineralized Tissues Section, Hospital for Special Surgery, New York, NY USA
| | - Mila Spevak
- Research Division, Mineralized Tissues Section, Hospital for Special Surgery, New York, NY USA
| | - Nancy Pleshko Camacho
- Research Division, Mineralized Tissues Section, Hospital for Special Surgery, New York, NY USA
| | - Stephen Doty
- Research Division, Microscopy Core Facility, Hospital for Special Surgery, New York, NY USA
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Eugénio S, Sivakumar M, Vilar R, Rego AM. Characterisation of dentin surfaces processed with KrF excimer laser radiation. Biomaterials 2005; 26:6780-7. [PMID: 15949843 DOI: 10.1016/j.biomaterials.2005.03.047] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2004] [Accepted: 03/24/2005] [Indexed: 11/18/2022]
Abstract
In the present work, the surface microtexture and chemical changes induced in human dentin by laser processing with KrF excimer laser radiation using fluences ranging from 0.5 to 20 J/cm2 were studied by SEM, XPS and FTIR. Two distinct behaviours were observed in the evolution of surface topography. In some samples, the laser-treated surface remained flat, independently of the fluence used. It was covered by a layer formed of redeposited ablation particles, which occluded the dentinal apertures. In other samples the surface topography depended on radiation fluence. When the fluence was lower than 1 J/cm2, preferential removal of intertubular dentin occurs, producing a columnar structure in which the columns are essentially formed of peritubular material. If the fluence exceeded 1 J/cm2 the processed surface was flat and covered with resolidified material. Despite these topographic changes, the dentin was not significantly affected by the laser treatment. The observed behaviour can be explained by differences in the constitution of dentin.
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Affiliation(s)
- Sónia Eugénio
- Departamento de Engenharia de Materiais, Instituto Superior Técnico, 1049-001 Lisboa, Portugal
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Bachmann L, Diebolder R, Hibst R, Zezell DM. Changes in chemical composition and collagen structure of dentine tissue after erbium laser irradiation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2005; 61:2634-9. [PMID: 16043057 DOI: 10.1016/j.saa.2004.09.026] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2004] [Revised: 09/29/2004] [Accepted: 09/30/2004] [Indexed: 05/03/2023]
Abstract
Erbium laser radiation has a great affinity for the water molecule, which is present in quantity in biological hard tissues. The objective of this work is to identify chemical changes by infrared spectroscopy of irradiated dentine by an Er:YAG-2.94 microm laser. The irradiation was performed with fluences between 0.365 and 1.94 J/cm2. For the infrared analysis a Fourier transform infrared spectrometer was used. After the irradiation were observed: loss of water, alteration of the structure and composition of the collagen, and increase of the OH- radical. These alterations can be identified by a decrease in intensity of the water band between 2800-3800 cm(-1), OH- band at 3575 cm(-1) and bands ascribed to organic matrix between 2800-3400 cm(-1) and 1100-1400 cm(-1).
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Affiliation(s)
- Luciano Bachmann
- Centro de Lasers e Aplicações CLA Instituto de Pesquisas Energéticas e Nucleares IPEN/CNEN-SP, Avenue Lineu Prestes, 2242 Cidade Universitária, 05508-900 São Paulo, SP, Brazil.
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West PA, Torzilli PA, Chen C, Lin P, Camacho NP. Fourier transform infrared imaging spectroscopy analysis of collagenase-induced cartilage degradation. JOURNAL OF BIOMEDICAL OPTICS 2005; 10:14015. [PMID: 15847596 DOI: 10.1117/1.1854131] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Collagenase treatment of cartilage serves as an in vitro model of the pathological collagen degradation that occurs in the disease osteoarthritis (OA). Fourier transform infrared imaging spectroscopic (FT-IRIS) analysis of collagenase-treated cartilage is performed to elucidate the molecular origin of the spectral changes previously found at the articular surface of human OA cartilage. Bovine cartilage explants are treated with 0.1% collagenase for 0, 15, or 30 min. In situ collagen cleavage is assessed using immunofluorescent staining with an antibody specific for broken type II collagen. The FT-IRIS analysis of the control and treated specimens mirrors the differences previously found between normal and OA cartilage using an infrared fiber optic probe (IFOP). With collagenase treatment, the amide II/1338 cm(-1) area ratio increases while the 1238 cm(-1)/1227 cm(-1) peak ratio decreases. In addition, polarized FT-IRIS demonstrates a more random orientation of the collagen fibrils that correlate spatially with the immunofluorescent-determined regions of broken type II collagen. We can therefore conclude that the spectral changes observed in the collagenase-treated cartilage, and similarly in OA cartilage, arise from changes in collagen structure. These findings support the use of mid-infrared spectral analysis, in particular the minimally invasive IFOP, as potential techniques for the diagnosis and management of degenerative joint diseases such as osteoarthritis.
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Affiliation(s)
- P A West
- Hospital for Special Surgery, Research Division, 535 East 70th Street, New York, New York 10021, USA.
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West PA, Bostrom MPG, Torzilli PA, Camacho NP. Fourier transform infrared spectral analysis of degenerative cartilage: an infrared fiber optic probe and imaging study. APPLIED SPECTROSCOPY 2004; 58:376-381. [PMID: 15104805 DOI: 10.1366/000370204773580194] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A preliminary investigation into the diagnostic potential of an infrared fiber optic probe (IFOP) for evaluating degenerative human articular cartilage is described. Twelve arthritic human tibial plateaus obtained during arthroplasty were analyzed using the IFOP. Infrared spectra were obtained from IFOP contact with articular surface sites visually graded normal or degraded (Collins Scale grade 1 and grade 3, respectively). Comparisons of infrared spectral parameters (peak heights and areas) were made to elucidate spectral indicators of surface degeneration. IFOP spectral analysis revealed subtle but consistent changes between grades 1 and 3 sites. Infrared absorbance bands arising from type II collagen were observed to change with degradation. More degraded tissues exhibited increased amide II (1590-1480 cm(-1))/1338 cm(-1) area ratio (p=0.034) and decreased 1238/1227 cm(-1) peak ratio (p = 0.017); similar changes were seen with Fourier transform infrared imaging spectroscopy (FT-IRIS) analysis. Grades 1 and 3 cartilage showed consistent spectral differences in the amide II, III, and 1338 cm(-1) regions that are likely related to type II collagen degradation that accompanies cartilage degeneration. These results suggest that it may be possible to monitor subtle changes related to early cartilage degeneration, allowing for IFOP use during arthroscopy for in situ determination of cartilage integrity.
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Affiliation(s)
- P A West
- Research Division, The Hospital for Special Surgery, 535 E 70th Street, New York, New York 10021, USA.
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Paschalis EP, Verdelis K, Doty SB, Boskey AL, Mendelsohn R, Yamauchi M. Spectroscopic characterization of collagen cross-links in bone. J Bone Miner Res 2001; 16:1821-8. [PMID: 11585346 DOI: 10.1359/jbmr.2001.16.10.1821] [Citation(s) in RCA: 364] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Collagen is the most abundant protein of the organic matrix in mineralizing tissues. One of its most critical properties is its cross-linking pattern. The intermolecular cross-linking provides the fibrillar matrices with mechanical properties such as tensile strength and viscoelasticity. In this study, Fourier transform infrared (FTIR) spectroscopy and FTIR imaging (FTIRI) analyses were performed in a series of biochemically characterized samples including purified collagen cross-linked peptides, demineralized bovine bone collagen from animals of different ages, collagen from vitamin B6-deficient chick homogenized bone and their age- and sex-matched controls, and histologically stained thin sections from normal human iliac crest biopsy specimens. One region of the FTIR spectrum of particular interest (the amide I spectral region) was resolved into its underlying components. Of these components, the relative percent area ratio of two subbands at approximately 1660 cm(-1) and approximately 1690 cm(-1) was related to collagen cross-links that are abundant in mineralized tissues (i.e., pyridinoline [Pyr] and dehydrodihydroxylysinonorleucine [deH-DHLNL]). This study shows that it is feasible to monitor Pyr and DHLNL collagen cross-links spatial distribution in mineralized tissues. The spectroscopic parameter established in this study may be used in FTIRI analyses, thus enabling the calculation of relative Pyr/DHLNL amounts in thin (approximately 5 microm) calcified tissue sections with a spatial resolution of approximately 7 microm.
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Affiliation(s)
- E P Paschalis
- Mineralized Tissues Section, Hospital for Special Surgery, New York, New York 10021, USA
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Peptides as Models for Understanding Protein Folding. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s1569-2558(08)60486-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Kamińska A, Sionkowska A. Photochemical transformations in collagen in the presence of β-carotene. J Photochem Photobiol A Chem 1996. [DOI: 10.1016/1010-6030(95)04278-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
Collagens can be distinguished from other proteins based on their triple-helical structure. Synthetic peptide models have been developed to better understand the triple helix structurally and to evaluate the triple helix as a recognition element for biological processes. Associated triple-helical peptides were first designed and assembled by solid-phase methodology in the late 1960s. Such peptides were used for triple-helical structural characterization by CD, nmr, and ir spectroscopies, and x-ray crystallography, and for studying the structural preferences of hydroxylases. In the late 1970s, methods were developed for covalently linking the three strands of triple-helical peptides. One benefit of "branched" peptides was the enhancement of triple-helical thermal stability. The incorporation of specific collagen sequences into thermally stable synthetic triple helices in the early 1990s has allowed for the mechanistic investigation of collagen-mediated cell adhesion and platelet aggregation. In time, discriminatory therapeutics may result from the continued exploration and further understanding of the biological effects of collagen primary, secondary, and tertiary structures via triple-helical peptide models.
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Affiliation(s)
- G B Fields
- Department of Laboratory Medicine, University of Minnesota, Minneapolis 55455, USA
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Abstract
Polarized Fourier transform infrared microscopy (FT-IRM) was used to assess the orientation of mineral and matrix components of the normally calcified turkey leg tendon. Two groups of tendon, < 16 weeks of age (young) and > 60 weeks of age (old), were analyzed. Linear sequences from calcified, non-calcified, and transitional regions of the tendons were examined. Spectra collected in the "parallel polarization" mode were acquired with the electric vector of the infrared radiation parallel to the collagen fiber axis whereas spectra collected in the "perpendicular polarization" mode were acquired with the electric vector of the infrared radiation perpendicular to this axis. The v2 carbonate (850-890 cm-1) and v1, v3 phosphate (900-1180 cm-1) contours of the tendon mineral as well as the collagen amide I, II, and III bands of the extracellular matrix all displayed marked dichroism. The CO3(2-) ions substituted for PO4(3-) (878 cm-1, type B substitution) in the tendon mineral displayed parallel dichroism while the CO3(2-) ions substituted for OH (871 cm-1, type A substitution) in the tendon mineral displayed perpendicular dichroism. These orientational effects for both sites of carbonate substitution were greater in the older animals. The polarization properties of the v1, v3 phosphate contour were analyzed by use of an empirical anisotropy parameter (A), the value of which monitors the degree of orientation. This index significantly increased in the older animals indicating that aging produces a more highly oriented mineral. The amide I, II, and III contours of the collagen extracellular matrix also exhibited marked dichroism. The amide I component exhibits perpendicular dichroism while the amide II and III components exhibit parallel dichroism. The current study demonstrates the ability of polarized FT-IRM to assess the orientation of the mineral and matrix components of calcified tissue at the microscopic level.
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Affiliation(s)
- S J Gadaleta
- Department of Chemistry, Newark College of Arts and Sciences, Rutgers University, New Jersey 07102, USA
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Fields CG, Lovdahl CM, Miles AJ, Hagen VL, Fields GB. Solid-phase synthesis and stability of triple-helical peptides incorporating native collagen sequences. Biopolymers 1993; 33:1695-707. [PMID: 8241428 DOI: 10.1002/bip.360331107] [Citation(s) in RCA: 88] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A generally applicable solid-phase methodology has been developed for the synthesis of triple-helical polypeptides incorporating native collagen sequences. Three nascent peptide chains are C-terminal linked through one N alpha-amino and two N epsilon-amino groups of Lys, while repeating Gly-Pro-Hyp triplets induce triple helicity. Different protecting group strategies, including several three-dimensionally orthogonal schemes, have been utilized for the synthesis of four homotrimeric triple-helical polypeptides (THPs) of 79-124 residues, three of which incorporate native type IV collagen sequences. Highly efficient assemblies were achieved by 9-fluorenylmethoxycarbonyl (Fmoc) N alpha-amino group protection, in situ 2-(1H-benzotriazole-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate mediated couplings, and 1,8-diazabicyclo [5.4.0] undec-7-ene mediated Fmoc group removal. THPs were characterized by Edman degradation sequencing, size-exclusion chromatography, mass spectrometry, reversed-phase high performance liquid chromatography, and CD spectroscopy. THP thermal stabilities ranged from 35 to 59 degrees C, with chain length and Hyp content being the influential factors. Melting temperatures and van't Hoff enthalpies for peptide triple-helical denaturation could be correlated well to Hyp content. The THP synthetic protocol developed here will allow for the study of both structure and biological activity of specific collagen sequences in homotrimeric and heterotrimeric forms.
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Affiliation(s)
- C G Fields
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis 55455
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Lazarev YA, Grishkovsky BA, Khromova TB, Lazareva AV, Grechishko VS. Bound water in the collagen-like triple-helical structure. Biopolymers 1992; 32:189-95. [PMID: 1637993 DOI: 10.1002/bip.360320209] [Citation(s) in RCA: 61] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The ir amide bands of the triple-helical polytripeptides and collagens upon hydration of films are investigated. On the basis of our assignment of the amide I components, the formation of hydrogen bonds between the peptide backbone and structural water is studied. The C1O1--HOH hydrogen bonds are found more ordered than the C3O3--HOH hydrogen bonds. The specific incorporation of water in the triple helix is followed by multistep conformational changes and by increasing of the interpeptide hydrogen-bond strength. The formation of the polypeptide hydrate structure depending on the amino acid composition and the chain length is examined.
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Affiliation(s)
- Y A Lazarev
- Institute of Cell Biophysics, Academy of Sciences of the USSR, Pushchino, Moscow Region
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Payne KJ, Veis A. Fourier transform IR spectroscopy of collagen and gelatin solutions: deconvolution of the amide I band for conformational studies. Biopolymers 1988; 27:1749-60. [PMID: 3233328 DOI: 10.1002/bip.360271105] [Citation(s) in RCA: 398] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Jodaikin A, Weiner S, Perl-Treves D, Traub W, Termine J. Developing enamel matrix proteins: a conformation study of enamelins and amelogenins. Int J Biol Macromol 1987. [DOI: 10.1016/0141-8130(87)90046-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lazarev YA, Grishkovsky BA, Khromova TB. Amide I band of IR spectrum and structure of collagen and related polypeptides. Biopolymers 1985; 24:1449-78. [PMID: 4041546 DOI: 10.1002/bip.360240804] [Citation(s) in RCA: 123] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Diem M, Bhatnagar RS, Druyan ME, Renugopalakrishnan V. Solution-phase Raman-spectroscopic studies on synthetic collagen analogs: prolyl-prolyl-glycine and (prolyl-prolyl-glycine). Biopolymers 1984; 23:2955-61. [PMID: 6525410 DOI: 10.1002/bip.360231218] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Inouye K, Kobayashi Y, Kyogoku Y, Kishida Y, Sakakibara S, Prockop DJ. Synthesis and physical properties of (hydroxyproline-proline-glycine)10: hydroxyproline in the X-position decreases the melting temperature of the collagen triple helix. Arch Biochem Biophys 1982; 219:198-203. [PMID: 7181510 DOI: 10.1016/0003-9861(82)90149-7] [Citation(s) in RCA: 95] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Roth W, Heidemann E. Triple helix coil transition of a blockpolymer with the sequence Boc-(Gly-Pro-Pro)5-(Gly-Pro-Leu)5-(Gly-Pro-Pro)5-NH2. INTERNATIONAL JOURNAL OF PEPTIDE AND PROTEIN RESEARCH 1981; 17:527-30. [PMID: 7309357 DOI: 10.1111/j.1399-3011.1981.tb02024.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Lazarev YA, Terpugov EL. Effect of water on the structure of bacteriorhodopsin and photochemical processes in purple membranes. BIOCHIMICA ET BIOPHYSICA ACTA 1980; 590:324-38. [PMID: 7378392 DOI: 10.1016/0005-2728(80)90203-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Visible and infrared spectra of bacteriorhodopsin films under different humidities at room and low temperatures are investigated. On dehydration of purple membranes at room temperatures an additional chromophore state with the absorption band at 506 nm is revealed. The photocycle of purple membranes in the dry state is devoid of the 550 nm intermediate and involves the long-lived intermediate at 412 nm. As water is removed, the 550 nm intermediate becomes undetectable. The analysis of the infrared spectra shows that dehydration does not affect the ordering of the main network of the interpeptide hydrogen bonds which stabilizes the alpha-helical conformation (slightly distorted in the intial humid dark- and light-adapted state); light adaptation (cis-trans isomerization) of bacteriorhodopsin results in an increase of sorbed water in purple membranes. Dehydration of purple membranes decreases the reaction rate of cis-trans isomerization.
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