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Acher O, Aleksanyan A, Thieffry A. Confocal Raman microscope with versatile dual polarization snapshot acquisition. OPTICS EXPRESS 2022; 30:46734-46748. [PMID: 36558618 DOI: 10.1364/oe.473360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 11/17/2022] [Indexed: 06/17/2023]
Abstract
In this paper we propose a new strategy towards simultaneous co- and cross-polarized measurements of Raman spectra in a confocal microscope. One of the advantages of this strategy is that it is immune to polarization-dependent efficiency of diffraction gratings. It is shown via linear angle-resolved and circular polarization measurements that the accuracy of these snapshot polarization measurements on solid and liquid samples are in good agreement with available models and data. The interest of simultaneous acquisition of the total Raman response and the degree of polarization is discussed as well.
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Laramée AW, Lanthier C, Pellerin C. Raman Investigation of the Processing Structure Relations in Individual Poly(ethylene terephthalate) Electrospun Fibers. APPLIED SPECTROSCOPY 2022; 76:51-60. [PMID: 34643130 PMCID: PMC8750136 DOI: 10.1177/00037028211049242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 08/22/2021] [Indexed: 06/13/2023]
Abstract
*These authors contributed equally.Electrospun fibers often exhibit enhanced properties at reduced diameters, a characteristic now widely attributed to a high molecular orientation of the polymer chains along the fiber axis. A parameter that can affect the molecular organization is the type of collector onto which fibers are electrospun. In this work, we use polarized confocal Raman spectromicroscopy to determine the incidence of the three most common types of collectors on the molecular orientation and structure in individual fibers of a broad range of diameters. Poly(ethylene terephthalate) is used as a model system for fibers of weakly crystalline polymers. A clear correlation emerges between the choice of collector, the induced molecular orientation, the fraction of trans conformers, and the degree of crystallinity within fibers. Quantitative structural information gathered by Raman contributes to a general description of the mechanism of action of the collectors based on the additional strain they exert on the forming fibers.
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Assessing the Molecular Specificity and Orientation Sensitivity of Infrared, Raman, and Vibrational Sum-Frequency Spectra. Symmetry (Basel) 2020. [DOI: 10.3390/sym13010042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Linear programming was used to assess the ability of polarized infrared absorption, Raman scattering, and visible–infrared sum-frequency generation to correctly identify the composition of a mixture of molecules adsorbed onto a surface in four scenarios. The first two scenarios consisted of a distribution of species where the polarity of the orientation distribution is known, both with and without consideration of an arbitrary scaling factor between candidate spectra and the observed spectra of the mixture. The final two scenarios have repeated the tests, but assuming that the polarity of the orientation is unknown, so the symmetry-breaking attributes of the second-order nonlinear technique are required. The results indicate that polarized Raman spectra are more sensitive to orientation and molecular identity than the other techniques. However, further analysis reveals that this sensitivity is not due to the high-order angle dependence of Raman, but is instead attributed to the number of unique projections that can be measured in a polarized Raman experiment.
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Wang Z, Sun B, Lu X, Wang C, Su Z. Molecular Orientation in Individual Electrospun Nanofibers Studied by Polarized AFM–IR. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01778] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Zeqian Wang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- University of Science and Technology of China, Hefei 230026, P. R. China
| | - Bolun Sun
- Alan G. MacDiarmid Institute, Jilin University, Changchun 130012, P. R. China
| | - Xiaofeng Lu
- Alan G. MacDiarmid Institute, Jilin University, Changchun 130012, P. R. China
| | - Ce Wang
- Alan G. MacDiarmid Institute, Jilin University, Changchun 130012, P. R. China
| | - Zhaohui Su
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- University of Science and Technology of China, Hefei 230026, P. R. China
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Richard-Lacroix M, Umuhire KN, Lister E, Pellerin C, Badia A. Selective Isotopic Labeling Resolves the Gel-to-Fluid Phase Transitions of the Individual Leaflets of a Planar-Supported Phospholipid Bilayer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:9912-9922. [PMID: 31277548 DOI: 10.1021/acs.langmuir.9b00747] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Knowledge of the thermotropic phase behavior of solid-supported bilayer lipid assemblies is essential to mimick the molecular organization and lateral fluidity of cell membranes. The gel-to-fluid phase transitions in a homologous series of single phospholipid bilayers supported on planar silicon substrates were investigated by temperature-controlled atomic force microscopy and attenuated total reflection infrared spectroscopy to obtain complementary information at the mesoscopic and molecular scales. Symmetric bilayers of dipalmitoylphosphatidylcholine (DPPC) and vertically asymmetric bilayers composed of a leaflet of DPPC and another of acyl-chain-deuterated DPPC (DPPC-d62) were prepared by the Langmuir-Blodgett technique. The selective deuteration of one of the bilayer leaflets enabled the simultaneous monitoring by IR spectroscopy of the acyl chain melting in each leaflet via the spectrally isolated CH2 and CD2 stretching vibrations. Two gel-to-fluid transitions were discerned for both the symmetric and asymmetric bilayers in ultrapure water. The deuterium isotope effect observed in free-standing membranes was maintained for the supported bilayers. IR spectroscopy revealed that the melting of one leaflet promotes the disordering of the acyl chains in the adjacent one. The findings suggest that the two leaflet phase transitions do not evolve in isolation. This work sheds insight into the nature of leaflet-leaflet interactions and the thermodynamic properties of surface-confined phospholipid bilayers.
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Affiliation(s)
- Marie Richard-Lacroix
- Département de chimie, Centre québécois sur les matériaux fonctionnels , Université de Montréal , C.P. 6128, succursale Centre-ville , Montréal , QC H3C 3J7 , Canada
| | - Kayiganwa Natyvella Umuhire
- Département de chimie, Centre québécois sur les matériaux fonctionnels , Université de Montréal , C.P. 6128, succursale Centre-ville , Montréal , QC H3C 3J7 , Canada
| | - Eugénie Lister
- Département de chimie, Centre québécois sur les matériaux fonctionnels , Université de Montréal , C.P. 6128, succursale Centre-ville , Montréal , QC H3C 3J7 , Canada
| | - Christian Pellerin
- Département de chimie, Centre québécois sur les matériaux fonctionnels , Université de Montréal , C.P. 6128, succursale Centre-ville , Montréal , QC H3C 3J7 , Canada
| | - Antonella Badia
- Département de chimie, Centre québécois sur les matériaux fonctionnels , Université de Montréal , C.P. 6128, succursale Centre-ville , Montréal , QC H3C 3J7 , Canada
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Kida T, Hiejima Y, Nitta KH. Rheo-Raman Spectroscopic Study on Uniaxial Deformation Behavior of High-Density Polyethylene Solids with Various Molecular Weight Distributions. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02740] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Takumitsu Kida
- Department of Chemical and Materials Science, Kanazawa University, Kakuma Campus, Kanazawa 920-1192, Japan
| | - Yusuke Hiejima
- Department of Chemical and Materials Science, Kanazawa University, Kakuma Campus, Kanazawa 920-1192, Japan
| | - Koh-hei Nitta
- Department of Chemical and Materials Science, Kanazawa University, Kakuma Campus, Kanazawa 920-1192, Japan
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KIDA T, HIEJIMA Y, NITTA KH. Raman Spectroscopic Study of Microscopic Deformation Behavior of Crystalline Polyolefin Solids. KOBUNSHI RONBUNSHU 2018. [DOI: 10.1295/koron.2018-0029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Takumitsu KIDA
- Division of Natural System, Graduate School of Natural Science & Technology, Kanazawa University
| | - Yusuke HIEJIMA
- School of Frontier Engineering, College of Science and Engineering, Kanazawa University
| | - Koh-hei NITTA
- School of Frontier Engineering, College of Science and Engineering, Kanazawa University
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Papkov D, Pellerin C, Dzenis YA. Polarized Raman Analysis of Polymer Chain Orientation in Ultrafine Individual Nanofibers with Variable Low Crystallinity. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01869] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
| | - Christian Pellerin
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
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Kida T, Hiejima Y, Nitta KH. Rheo-Raman spectroscopic study of microscopic deformation behavior for ultra-low-density polyethylene. POLYM INT 2018. [DOI: 10.1002/pi.5533] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Takumitsu Kida
- Department of Chemical and Materials Science; Kanazawa University, Kakuma; Kanazawa Japan
| | - Yusuke Hiejima
- Department of Chemical and Materials Science; Kanazawa University, Kakuma; Kanazawa Japan
| | - Koh-hei Nitta
- Department of Chemical and Materials Science; Kanazawa University, Kakuma; Kanazawa Japan
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Dionne J, Lefèvre T, Bilodeau P, Lamarre M, Auger M. A quantitative analysis of the supercontraction-induced molecular disorientation of major ampullate spider silk. Phys Chem Chem Phys 2018; 19:31487-31498. [PMID: 29159351 DOI: 10.1039/c7cp05739c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Spider silks exhibit remarkable properties, among which the so-called supercontraction, a physical phenomenon by which fibers undergo a longitudinal shrinkage and a radial swelling when exposed to water. The process is marked by a significant decrease in chain orientation resulting from plasticisation of the amorphous phase. Despite several studies that determined the Hermans orientation function, more quantitative data are required to be able to describe theoretically the macroscopic water-induced shrinkage from molecular reorganization. Here, we have examined the supercontraction of the major ampullate silk single fibers of Nephila clavipes (Nc) and Araneus diadematus (Ad) using polarized Raman spectromicroscopy. We determined the order parameters, the orientation distribution and the secondary structure content. Our data suggest that supercontraction induces a slight increase in β-sheet content, consistently with previous works. The β-sheet orientation is slightly affected by supercontraction compared to that of the amorphous phase, which becomes almost isotropic with shrinkage. Despite an initially lower orientation level, the Ad fiber shows a larger orientation decrease than Nc, consistently with its higher shrinkage amplitude. Although they share similar trends, absolute values of the orientation parameters from this work differ from those found in the literature. We took advantage of having determined the distribution of orientation to estimate the amplitude of shrinkage from changes in macromolecular size resulting from molecular disorientation. Our calculations show that more realistic models are needed to correlate molecular reorientation/refolding to macroscopic shrinkage. This work also underlines that more accurate data relative to molecular orientation are necessary.
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Affiliation(s)
- J Dionne
- Département de chimie, Regroupement québécois de Recherche sur la Fonction, l'Ingénierie et les Applications des Protéines (PROTEO), Centre de Recherche sur les Matériaux Avancés (CERMA), Centre Québécois sur les Matériaux Fonctionnels (CQMF), Université Laval, Pavillon Alexandre-Vachon, QC G1V 0A6, Canada.
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Richard-Lacroix M, Borozenko K, Pellerin C, Bazuin CG. Bridging the Gap between the Mesoscopic 2D Order–Order Transition and Molecular-Level Reorganization in Dot-Patterned Block Copolymer Monolayers. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01980] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Marie Richard-Lacroix
- Département de chimie,
Centre de recherche sur les matériaux auto−assemblés
(CRMAA/CSACS), Université de Montréal, C.P. 6128, succursale Centre-Ville, Montréal, QC, Canada H3C 3J7
| | - Kateryna Borozenko
- Département de chimie,
Centre de recherche sur les matériaux auto−assemblés
(CRMAA/CSACS), Université de Montréal, C.P. 6128, succursale Centre-Ville, Montréal, QC, Canada H3C 3J7
| | - Christian Pellerin
- Département de chimie,
Centre de recherche sur les matériaux auto−assemblés
(CRMAA/CSACS), Université de Montréal, C.P. 6128, succursale Centre-Ville, Montréal, QC, Canada H3C 3J7
| | - C. Geraldine Bazuin
- Département de chimie,
Centre de recherche sur les matériaux auto−assemblés
(CRMAA/CSACS), Université de Montréal, C.P. 6128, succursale Centre-Ville, Montréal, QC, Canada H3C 3J7
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Sereda V, Ralbovsky NM, Vasudev MC, Naik RR, Lednev IK. Polarized Raman Spectroscopy for Determining the Orientation of di-D-phenylalanine Molecules in a Nanotube. JOURNAL OF RAMAN SPECTROSCOPY : JRS 2016; 47:1056-1062. [PMID: 27795612 PMCID: PMC5079532 DOI: 10.1002/jrs.4884] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Self-assembly of short peptides into nanostructures has become an important strategy for the bottom-up fabrication of nanomaterials. Significant interest to such peptide-based building blocks is due to the opportunity to control the structure and properties of well-structured nanotubes, nanofibrils, and hydrogels. X-ray crystallography and solution NMR, two major tools of structural biology, have significant limitations when applied to peptide nanotubes because of their non-crystalline structure and large weight. Polarized Raman spectroscopy was utilized for structural characterization of well-aligned D-Diphenylalanine nanotubes. The orientation of selected chemical groups relative to the main axis of the nanotube was determined. Specifically, the C-N bond of CNH3+groups is oriented parallel to the nanotube axis, the peptides' carbonyl groups are tilted at approximately 54° from the axis and the COO- groups run perpendicular to the axis. The determined orientation of chemical groups allowed the understanding of the orientation of D-diphenylalanine molecule that is consistent with its equilibrium conformation. The obtained data indicate that there is only one orientation of D-diphenylalanine molecules with respect to the nanotube main axis.
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Affiliation(s)
- Valentin Sereda
- Department of Chemistry, University at Albany, SUNY, 1400 Washington Avenue, Albany, NY 12222, United States
| | - Nicole M. Ralbovsky
- Department of Chemistry, University at Albany, SUNY, 1400 Washington Avenue, Albany, NY 12222, United States
| | - Milana C. Vasudev
- Department of Bioengineering, University of Massachusetts Dartmouth, 285 Old Westport Road, Dartmouth MA 02747, United States
| | - Rajesh R. Naik
- Soft Matter Materials Branch, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, Dayton, Ohio 45433, United States
| | - Igor K. Lednev
- Department of Chemistry, University at Albany, SUNY, 1400 Washington Avenue, Albany, NY 12222, United States
- Corresponding author: , Phone: (518) 591 8863, Fax: (518) 442-3462
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Dionne J, Lefèvre T, Auger M. Major Ampullate Spider Silk with Indistinguishable Spidroin Dope Conformations Leads to Different Fiber Molecular Structures. Int J Mol Sci 2016; 17:E1353. [PMID: 27548146 PMCID: PMC5000749 DOI: 10.3390/ijms17081353] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 08/11/2016] [Accepted: 08/15/2016] [Indexed: 11/17/2022] Open
Abstract
To plentifully benefit from its properties (mechanical, optical, biological) and its potential to manufacture green materials, the structure of spider silk has to be known accurately. To this aim, the major ampullate (MA) silk of Araneus diadematus (AD) and Nephila clavipes (NC) has been compared quantitatively in the liquid and fiber states using Raman spectromicroscopy. The data show that the spidroin conformations of the two dopes are indistinguishable despite their specific amino acid composition. This result suggests that GlyGlyX and GlyProGlyXX amino acid motifs (X = Leu, Glu, Tyr, Ser, etc.) are conformationally equivalent due to the chain flexibility in the aqueous environment. Species-related sequence specificity is expressed more extensively in the fiber: the β-sheet content is lower and width of the orientation distribution of the carbonyl groups is broader for AD (29% and 58°, respectively) as compared to NC (37% and 51°, respectively). β-Sheet content values are close to the proportion of polyalanine segments, suggesting that β-sheet formation is mainly dictated by the spidroin sequence. The extent of molecular alignment seems to be related to the presence of proline (Pro) that may decrease conformational flexibility and inhibit chain extension and alignment upon drawing. It appears that besides the presence of Pro, secondary structure and molecular orientation contribute to the different mechanical properties of MA threads.
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Affiliation(s)
- Justine Dionne
- Regroupement québécois de Recherche sur la Fonction, l'Ingénierie et les Applications des Protéines (PROTEO), Centre de Recherche sur les Matériaux Avancés (CERMA), Centre Québécois sur les Matériaux Fonctionnels (CQMF), Département de Chimie, Université Laval, Pavillon Alexandre-Vachon, Ville de Québec, QC G1V 0A6, Canada.
| | - Thierry Lefèvre
- Regroupement québécois de Recherche sur la Fonction, l'Ingénierie et les Applications des Protéines (PROTEO), Centre de Recherche sur les Matériaux Avancés (CERMA), Centre Québécois sur les Matériaux Fonctionnels (CQMF), Département de Chimie, Université Laval, Pavillon Alexandre-Vachon, Ville de Québec, QC G1V 0A6, Canada.
| | - Michèle Auger
- Regroupement québécois de Recherche sur la Fonction, l'Ingénierie et les Applications des Protéines (PROTEO), Centre de Recherche sur les Matériaux Avancés (CERMA), Centre Québécois sur les Matériaux Fonctionnels (CQMF), Département de Chimie, Université Laval, Pavillon Alexandre-Vachon, Ville de Québec, QC G1V 0A6, Canada.
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Richard-Lacroix M, Pellerin C. Orientation and Partial Disentanglement in Individual Electrospun Fibers: Diameter Dependence and Correlation with Mechanical Properties. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00994] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Marie Richard-Lacroix
- Département de chimie
and Centre for Self-Assembled Chemical Structures, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Christian Pellerin
- Département de chimie
and Centre for Self-Assembled Chemical Structures, Université de Montréal, Montréal, QC H3C 3J7, Canada
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Chen J, Xiao HJ, Qi T, Chen DL, Long HM, Liu SH. Rare earths exposure and male infertility: the injury mechanism study of rare earths on male mice and human sperm. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:2076-2086. [PMID: 25167826 DOI: 10.1007/s11356-014-3499-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Accepted: 08/20/2014] [Indexed: 06/03/2023]
Abstract
The weight; testis/body coefficient; levels of LDH, SDH, SODH, G-6PD, and testosterone; cell cycle; and cell apoptosis of the male mice were influenced after being treated with 200 mg/[kg/day] of rare earths suspension for 3 weeks. The "Raman fingerprints" of the human sperm DNA exposed to 0.040 mg/ml CeCl3 were very different from those of the untreated; the Raman bands at 789 cm(-1) (backbone phosphodiester), PO4 backbone at 1,094 cm(-1), methylene deformation mode at 1,221 cm(-1), methylene deformation mode at 1,485 cm(-1), and amide II at 1,612 cm(-1), of which intensities and shifts were changed, might be the diagnostic biomarkers or potential therapeutic targets. The injury mechanism might be that the rare earths influence the oxidative stress and blood testosterone barrier, tangle the big biomolecule concurrently, which might cause the testicular cells and vascular system disorder and/or dysfunction, and at the same time change the physical and chemical properties of the sperm directly.
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Affiliation(s)
- Jun Chen
- Department of Infertility and Sexual Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, 510631, China
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Kida T, Oku T, Hiejima Y, Nitta KH. Deformation mechanism of high-density polyethylene probed by in situ Raman spectroscopy. POLYMER 2015. [DOI: 10.1016/j.polymer.2014.12.030] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Antioxidative protective effect of icariin on the FeSO4/H 2O 2-damaged human sperm based on confocal raman micro-spectroscopy. ACTA ACUST UNITED AC 2014; 34:755-760. [PMID: 25318889 DOI: 10.1007/s11596-014-1348-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 07/25/2014] [Indexed: 01/08/2023]
Abstract
Oxidative stress is implicated in male infertility and significantly higher reactive oxygen species are detected in 25% of infertile males. Although different agents of various alternative medicines, including traditional Chinese medicine, have been tried with varying success, evidence remains limited on whether and how much herbs or supplements might help increase the anti-oxidant ability of the sperm. This study examined the anti-oxidative effects of icariin, a flavonoid isolated from Herba Epimedii, on the human sperm. We prepared the FeSO4/H2O2-damaged human sperms, which were co-cultured with icariin in vitro, and then observed the changes of the sperm by employing Raman micro-spectroscopy. The results showed that Raman mapping with a 514 nm excitation laser allowed clear differentiation of the nucleus, neck, and, in particular, the mitochondria-rich middle piece of a human sperm cell. The effect of icariin on different organelles of the sperm was quantified by localized spectral Raman signatures obtained within milli-seconds, and icariin could keep the "Raman fingerprint" of the human sperm the same as the control groups, suggesting that icariin could protect the human sperm from being damaged by FeSO4/H2O2. Icariin may serve as a tonifying and replenishing agent of herbal origin for enhancing reproductive functions.
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Chen DL, Li N, Lin L, Long HM, Lin H, Chen J, Zhang HM, Zeng CC, Liu SH. Confocal mirco-Raman spectroscopic analysis of the antioxidant protection mechanism of the oligosaccharides extracted from Morinda officinalis on human sperm DNA. JOURNAL OF ETHNOPHARMACOLOGY 2014; 153:119-24. [PMID: 24503037 DOI: 10.1016/j.jep.2014.01.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Revised: 12/03/2013] [Accepted: 01/18/2014] [Indexed: 05/27/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVENCE Male infertility is a stressful and frustrating problem for the society, but a number of male infertility treatments are available as traditional Chinese medicine strategies which have been tried with variable success, while evidence is still limited on whether-or how much-herbs or supplements might help increase fertility, so the aim of this study was to investigate if the oligosaccharides extracted from Morinda officialis, a Chinese herb, is the active constituents to the fertility. MATERIALS AND METHODS In this study, we prepared the H2O2-demaged human sperm, cocultured with the oligosaccharides in vitro, then observed the changes of the DNA using confocal micro-Raman spectroscopy, and comparative analysis the differences of the spectra of different treated groups. RESULTS The results showed that the oligosaccharides extracted from Morinda officialis can keep the "Raman fingerprints" of the human sperm DNA almost the same as those of the control groups, but very different from the H2O2-induced groups, especially the intensity of bands at 787, 993, 1094, 1254, 1340, 1376, 1421, 1443, 1487, 1577 and 1662cm(-1) which could be as potential targets for the drugs finding, and further principal component analysis was successfully used to classify the Raman spectra of normal control and model groups. CONCLUSION This results suggested that the oligosaccharides can protect the DNA of human sperm from being damaged by H2O2, and which was one of the active constituents of Morinda officialis on treating infertility. It was also demonstrated that Morinda officialis as a tonifying and replenishing natural herb medicine can be used to enhance reproductive functions, and the Raman spectroscopy could be an applicable technology for screening active components in vitro from herbs.
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Affiliation(s)
- Di-Ling Chen
- Southern Institute of Pharmaceutical Research, South China Normal University, Guangzhou, Guangdong 510631, People׳s Republic of China
| | - Ning Li
- Southern Institute of Pharmaceutical Research, South China Normal University, Guangzhou, Guangdong 510631, People׳s Republic of China
| | - Li Lin
- College of Chinese Materia Medical, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, People׳s Republic of China
| | - He-ming Long
- Department of Oncology, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi 341000, People׳s Republic of China
| | - Hui Lin
- College of Chinese Materia Medical, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, People׳s Republic of China
| | - Jun Chen
- Department of Infertility and Sexual Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510631, People׳s Republic of China
| | - He-Ming Zhang
- Southern Institute of Pharmaceutical Research, South China Normal University, Guangzhou, Guangdong 510631, People׳s Republic of China.
| | - Chang-chun Zeng
- School of Basic Medical Sciences, Guilin Medical University, Guilin, Guangxi 541004, People׳s Republic of China.
| | - Song-Hao Liu
- Southern Institute of Pharmaceutical Research, South China Normal University, Guangzhou, Guangdong 510631, People׳s Republic of China
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Makowski AJ, Pence IJ, Uppuganti S, Zein-Sabatto A, Huszagh MC, Mahadevan-Jansen A, Nyman JS. Polarization in Raman spectroscopy helps explain bone brittleness in genetic mouse models. JOURNAL OF BIOMEDICAL OPTICS 2014; 19:117008. [PMID: 25402627 PMCID: PMC4240742 DOI: 10.1117/1.jbo.19.11.117008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Accepted: 10/22/2014] [Indexed: 06/04/2023]
Abstract
Raman spectroscopy (RS) has been extensively used to characterize bone composition. However, the link between bone biomechanics and RS measures is not well established. Here, we leveraged the sensitivity of RS polarization to organization, thereby assessing whether RS can explain differences in bone toughness in genetic mouse models for which traditional RS peak ratios are not informative. In the selected mutant mice - activating transcription factor 4 (ATF4) or matrix metalloproteinase 9 (MMP9) knock-outs - toughness is reduced but differences in bone strength do not exist between knock-out and corresponding wild-type controls. To incorporate differences in the RS of bone occurring at peak shoulders, a multivariate approach was used. Full spectrum principal components analysis of two paired, orthogonal bone orientations (relative to laser polarization) improved genotype classification and correlation to bone toughness when compared to traditional peak ratios. When applied to femurs from wild-type mice at 8 and 20 weeks of age, the principal components of orthogonal bone orientations improved age classification but not the explanation of the maturation-related increase in strength. Overall, increasing polarization information by collecting spectra from two bone orientations improves the ability of multivariate RS to explain variance in bone toughness, likely due to polarization sensitivity to organizational changes in both mineral and collagen.
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Affiliation(s)
- Alexander J. Makowski
- Tennessee Valley Healthcare System, Department of Veterans Affairs, Nashville, Tennessee 27212, United States
- Vanderbilt University, Department of Biomedical Engineering, Nashville, Tennessee 37232, United States
- Vanderbilt University, Vanderbilt Center for Bone Biology, Nashville, Tennessee 37232, United States
- Vanderbilt University, Department of Orthopaedic Surgery and Rehabilitation, Nashville, Tennessee 37232, United States
| | - Isaac J. Pence
- Vanderbilt University, Department of Biomedical Engineering, Nashville, Tennessee 37232, United States
| | - Sasidhar Uppuganti
- Vanderbilt University, Department of Orthopaedic Surgery and Rehabilitation, Nashville, Tennessee 37232, United States
| | - Ahbid Zein-Sabatto
- Vanderbilt University, Department of Biomedical Engineering, Nashville, Tennessee 37232, United States
| | - Meredith C. Huszagh
- Vanderbilt University, Department of Biomedical Engineering, Nashville, Tennessee 37232, United States
| | - Anita Mahadevan-Jansen
- Vanderbilt University, Department of Biomedical Engineering, Nashville, Tennessee 37232, United States
| | - Jeffry S. Nyman
- Tennessee Valley Healthcare System, Department of Veterans Affairs, Nashville, Tennessee 27212, United States
- Vanderbilt University, Department of Biomedical Engineering, Nashville, Tennessee 37232, United States
- Vanderbilt University, Vanderbilt Center for Bone Biology, Nashville, Tennessee 37232, United States
- Vanderbilt University, Department of Orthopaedic Surgery and Rehabilitation, Nashville, Tennessee 37232, United States
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Chen DL, Zhang P, Lin L, Shuai O, Zhang HM, Liu SH, Wang JY. Protective effect of Bajijiasu against β-amyloid-induced neurotoxicity in PC12 cells. Cell Mol Neurobiol 2013; 33:837-50. [PMID: 23812758 DOI: 10.1007/s10571-013-9950-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 06/07/2013] [Indexed: 02/06/2023]
Abstract
Beta-amyloid peptide (Aβ), a major protein component of senile plaques associated with Alzheimer's disease (AD), is also directly neurotoxic. Mitigation of Aβ-induced neurotoxicity is thus a possible therapeutic approach to delay or prevent onset and progression of AD. This study evaluated the protective effect of Bajijiasu (β- D-fructofuranosyl (2-2) β- D-fructofuranosyl), a dimeric fructose isolated from the Chinese herb Radix Morinda officinalis, on Aβ-induced neurotoxicity in pheochromocytoma (PC12) cells. Bajijiasu alone had no endogenous neurotoxicity up to 200 μM. Brief pretreatment with 10-40 μM Bajijiasu (2 h) significantly reversed the reduction in cell viability induced by subsequent 24 h exposure to Aβ25-35 (21 μM) as measured by MTT and LDH assays, and reduced Aβ25-35-induced apoptosis as indicated by reduced annexin V-EGFP staining. Bajijiasu also decreased the accumulation of intracellular reactive oxygen species and the lipid peroxidation product malondialdehyde in PC12 cells, upregulated expression of glutathione reductase and superoxide dismutase, prevented depolarization of the mitochondrial membrane potential (Ψm), and blocked Aβ25-35-induced increases in [Ca(2+)] i . Furthermore, Bajijiasu reversed Aβ25-35-induced changes in the expression levels of p21, CDK4, E2F1, Bax, NF-κB p65, and caspase-3. Bajijiasu is neuroprotective against Aβ25-35-induced neurotoxicity in PC12 cells, likely by protecting against oxidative stress and ensuing apoptosis.
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Affiliation(s)
- Di-Ling Chen
- Southern Institute of Pharmaceutical Research, South China Normal University, Guangzhou, People's Republic of China
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Richard-Lacroix M, Pellerin C. Accurate New Method for Molecular Orientation Quantification Using Polarized Raman Spectroscopy. Macromolecules 2013. [DOI: 10.1021/ma400955u] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Marie Richard-Lacroix
- Département de chimie
and Centre for Self-Assembled Chemical Structures, Université de Montréal, Montréal, QC, H3C 3J7, Canada
| | - Christian Pellerin
- Département de chimie
and Centre for Self-Assembled Chemical Structures, Université de Montréal, Montréal, QC, H3C 3J7, Canada
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