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Di Foggia M, Taddei P, Boga C, Nocentini B, Micheletti G. Interactions between Damaged Hair Keratin and Juglone as a Possible Restoring Agent: A Vibrational and Scanning Electron Microscopy Study. Molecules 2024; 29:320. [PMID: 38257235 PMCID: PMC10819223 DOI: 10.3390/molecules29020320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 12/29/2023] [Accepted: 01/06/2024] [Indexed: 01/24/2024] Open
Abstract
Juglone, a quinonic compound present in walnut extracts, was proposed as a restoring agent for hair keratin treated with permanent or discoloration processes. The proposed mechanism of restoration by juglone involves the formation of a Michael adduct between the quinone and the thiol moieties of cysteine residues. To this purpose, the first part of the present paper involved the spectroscopic study of the product of the reaction between juglone and N-acetyl-L-cysteine as a model compound. IR spectroscopy and Scanning Electron Microscopy (SEM) monitored the chemical and morphological variations induced by applying juglone to hair keratin. In order to simulate the most common hair treatments (i.e., permanent and discoloration), juglone was applied to hair that had been previously treated with a reducing agent, i.e., methyl thioglycolate (MT) or with bleaching agents (based on hydrogen peroxide and persulfates) followed by sodium hydrogen sulfite. IR spectroscopy allowed us to monitor the formation of Michael adducts between juglone and cysteine residues: the Michael adducts' content was related to the cysteine content of the samples. In fact, MT and sodium hydrogen sulfite favored the reduction of the disulfide bonds and increased the content of free cysteine residues, which can react with juglone. SEM analyses confirmed the trend observed by IR spectroscopy since hair samples treated with juglone adopted a more regular hair surface and more imbricated scales, thus supporting the possible use of juglone as a restoring agent for damaged hair keratins.
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Affiliation(s)
- Michele Di Foggia
- Department of Biomedical and Neuromotor Sciences, Alma Mater Studiorum-Università di Bologna, Via Irnerio 48, 40126 Bologna, Italy;
| | - Paola Taddei
- Department of Biomedical and Neuromotor Sciences, Alma Mater Studiorum-Università di Bologna, Via Irnerio 48, 40126 Bologna, Italy;
| | - Carla Boga
- Department of Industrial Chemistry ‘Toso Montanari’, Alma Mater Studiorum-Università di Bologna, Via Piero Gobetti 85, 40129 Bologna, Italy; (C.B.); (G.M.)
| | | | - Gabriele Micheletti
- Department of Industrial Chemistry ‘Toso Montanari’, Alma Mater Studiorum-Università di Bologna, Via Piero Gobetti 85, 40129 Bologna, Italy; (C.B.); (G.M.)
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Ricciardi V, Lasalvia M, Perna G, Portaccio M, Delfino I, Lepore M, Capozzi V, Manti L. Vibrational spectroscopies for biochemical investigation of X-ray exposure effects on SH-SY5Y human neuroblastoma cells. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2023:10.1007/s00411-023-01035-2. [PMID: 37392215 DOI: 10.1007/s00411-023-01035-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 06/20/2023] [Indexed: 07/03/2023]
Abstract
Neuroblastoma is the most recurring cancer in childhood and adolescence. The SH-SY5Y neuroblastoma cell line is generally adopted for elaborating new therapeutical approaches and/or elaborating strategies for the prevention of central nervous system disturbances. In fact, it represents a valid model system for investigating in vitro the effects on the brain of X-ray exposure using vibrational spectroscopies that can detect early radiation-induced molecular alterations of potential clinical usefulness. In recent years, we dedicated significant efforts in the use of Fourier-transform and Raman microspectroscopy techniques for characterizing such radiation-induced effects on SH-SY5Y cells by examining the contributions from different cell components (DNA, proteins, lipids, and carbohydrates) to the vibrational spectra. In this review, we aim at revising and comparing the main results of our studies to provide a wide outlook of the latest outcomes and a framework for future radiobiology research using vibrational spectroscopies. A short description of our experimental approaches and data analysis procedures is also reported.
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Affiliation(s)
- Valerio Ricciardi
- Istituto Nazionale di Fisica Nucleare-Sezione di Napoli, 80100, Naples, Italy
| | - Maria Lasalvia
- Dipartimento di Medicina Clinica e Sperimentale, Università di Foggia, 71122, Foggia, Italy
- Istituto Nazionale di Fisica Nucleare-Sezione di Bari, 70100, Bari, Italy
| | - Giuseppe Perna
- Dipartimento di Medicina Clinica e Sperimentale, Università di Foggia, 71122, Foggia, Italy
- Istituto Nazionale di Fisica Nucleare-Sezione di Bari, 70100, Bari, Italy
| | - Marianna Portaccio
- Dipartimento di Medicina Sperimentale, Università della Campania "Luigi Vanvitelli", 80138, Naples, Italy
| | - Ines Delfino
- Dipartimento di Scienze Ecologiche e Biologiche, Università degli Studi della Tuscia, Viterbo, Italy.
| | - Maria Lepore
- Dipartimento di Medicina Sperimentale, Università della Campania "Luigi Vanvitelli", 80138, Naples, Italy
| | - Vito Capozzi
- Dipartimento di Medicina Clinica e Sperimentale, Università di Foggia, 71122, Foggia, Italy
- Istituto Nazionale di Fisica Nucleare-Sezione di Bari, 70100, Bari, Italy
| | - Lorenzo Manti
- Istituto Nazionale di Fisica Nucleare-Sezione di Napoli, 80100, Naples, Italy
- Dipartimento di Fisica "E. Pancini", Università degli Studi di Napoli "Federico II", 80100, Naples, Italy
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A Brief Review of FT-IR Spectroscopy Studies of Sphingolipids in Human Cells. BIOPHYSICA 2023. [DOI: 10.3390/biophysica3010011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
In recent years, sphingolipids have attracted significant attention due to their pivotal role in cellular functions and physiological diseases. A valuable tool for investigating the characteristics of sphingolipids can be represented via FT-IR spectroscopy, generally recognized as a very powerful technique that provides detailed biochemical information on the examined sample with the unique properties of sensitivity and accuracy. In the present paper, some fundamental aspects of sphingolipid components of human cells are summarized, and the most relevant articles devoted to the FT-IR spectroscopic studies of sphingolipids are revised. A short description of different FT-IR experimental approaches adopted for investigating sphingolipids is also given, with details about the most commonly used data analysis procedures. The present overview of FT-IR investigations, although not exhaustive, attests to the relevant role this vibrational technique has played in giving significant insight into many aspects of this fascinating class of lipids.
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Cansever Mutlu E, Kaya M, Küçük I, Ben-Nissan B, Stamboulis A. Exosome Structures Supported by Machine Learning Can Be Used as a Promising Diagnostic Tool. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7967. [PMID: 36431454 PMCID: PMC9693854 DOI: 10.3390/ma15227967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 10/23/2022] [Accepted: 11/02/2022] [Indexed: 06/16/2023]
Abstract
Principal component analysis (PCA) as a machine-learning technique could serve in disease diagnosis and prognosis by evaluating the dynamic morphological features of exosomes via Cryo-TEM-imaging. This hypothesis was investigated after the crude isolation of similarly featured exosomes derived from the extracellular vehicles (EVs) of immature dendritic cells (IDCs) JAWSII. It is possible to identify functional molecular groups by FTIR, but the unique physical and morphological characteristics of exosomes can only be revealed by specialized imaging techniques such as cryo-TEM. On the other hand, PCA has the ability to examine the morphological features of each of these IDC-derived exosomes by considering software parameters such as various membrane projections and differences in Gaussians, Hessian, hue, and class to assess the 3D orientation, shape, size, and brightness of the isolated IDC-derived exosome structures. In addition, Brownian motions from nanoparticle tracking analysis of EV IDC-derived exosomes were also compared with EV IDC-derived exosome images collected by scanning electron microscopy and confocal microscopy. Sodium-Dodecyl-Sulphate-Polyacrylamide-Gel-Electrophoresis (SDS-PAGE) was performed to separate the protein content of the crude isolates showing that no considerable protein contamination occurred during the crude isolation technique of IDC-derived-exosomes. This is an important finding because no additional purification of these exosomes is required, making PCA analysis both valuable and novel.
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Affiliation(s)
- Esra Cansever Mutlu
- College of Engineering and Physical Science, School of Metallurgy and Materials, Biomaterials Research Group, University of Birmingham, Birmingham B15 2TT, UK
- Department of Biomedical Engineering, Faculty of Engineering and Architecture, Beykent University, Sarıyer, 34398 İstanbul, Türkiye
| | - Mustafa Kaya
- Department of Biomedical Engineering, Faculty of Engineering and Architecture, Beykent University, Sarıyer, 34398 İstanbul, Türkiye
- Institute of Nanotechnology, Gebze Technical University, 41400 Gebze, Türkiye
| | - Israfil Küçük
- Institute of Nanotechnology, Gebze Technical University, 41400 Gebze, Türkiye
| | - Besim Ben-Nissan
- School of Life Sciences, Translational Biomaterials and Medicine Group, University of Technology Sydney, P.O. Box 123, Broadway, NSW 2007, Australia
| | - Artemis Stamboulis
- College of Engineering and Physical Science, School of Metallurgy and Materials, Biomaterials Research Group, University of Birmingham, Birmingham B15 2TT, UK
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Evaluation of Proton-Induced Biomolecular Changes in MCF-10A Breast Cells by Means of FT-IR Microspectroscopy. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12105074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Radiotherapy (RT) with accelerated beams of charged particles (protons and carbon ions), also known as hadrontherapy, is a treatment modality that is increasingly being adopted thanks to the several benefits that it grants compared to conventional radiotherapy (CRT) treatments performed by means of high-energy photons/electrons. Hence, information about the biomolecular effects in exposed cells caused by such particles is needed to better realize the underlying radiobiological mechanisms and to improve this therapeutic strategy. To this end, Fourier transform infrared microspectroscopy (μ-FT-IR) can be usefully employed, in addition to long-established radiobiological techniques, since it is currently considered a helpful tool for examining radiation-induced cellular changes. In the present study, MCF-10A breast cells were chosen to evaluate the effects of proton exposure using μ-FT-IR. They were exposed to different proton doses and fixed at various times after exposure to evaluate direct effects due to proton exposure and the kinetics of DNA damage repair. Irradiated and control cells were examined in transflection mode using low-e substrates that have been recently demonstrated to offer a fast and direct way to examine proton-exposed cells. The acquired spectra were analyzed using a deconvolution procedure and a ratiometric approach, both of which showed the different contributions of DNA, protein, lipid, and carbohydrate cell components. These changes were particularly significant for cells fixed 48 and 72 h after exposure. Lipid changes were related to variations in membrane fluidity, and evidence of DNA damage was highlighted. The analysis of the Amide III band also indicated changes that could be related to different enzyme contributions in DNA repair.
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Takahashi T. A highly resistant structure between the cuticle and the cortex of human hair III: Characterzation of the structure CARB. Int J Cosmet Sci 2021; 43:254-262. [PMID: 33527469 DOI: 10.1111/ics.12691] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/26/2021] [Accepted: 01/26/2021] [Indexed: 11/30/2022]
Abstract
OBJECTIVE It was previously reported that a highly resistant structure, which functions as a barrier against the penetration of dyes, is present at the interface between the cuticle and the cortex of human hair. That structure was named CARB, cuticle anchored resistant base. The goal of this study was to clarify the formation and composition of the structure CARB. METHODS Cuticular substructures were observed from the keratinized area of each hair to its root end. The positions where the CARB structure appeared were isolated, and the barrier ability before and after that structure was evaluated. The distributions of glycolipid and cystine were measured using a nano-IR and a transmission electron microscope (TEM). RESULTS Cuticular substructures were fully constructed several mm from the hair bulb of the hairs observed. The results show that keratinization at the distal side of the cuticle cell precedes that of the proximal side, and CARB is fully constructed last among the substructures. Glycolipid was preferentially distributed at CARB in the keratinized area. The cystine content of CARB is lower than that of the A-layer; however, it is slightly higher than that of the exocuticle and the inner layer. CONCLUSION These results demonstrate that CARB is produced in the final stage of keratinization of the cuticle layers. The rich contents of glycolipid and cystine might contribute to its resistant property.
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Affiliation(s)
- Toshie Takahashi
- R&D - Development Research, Kao Corporation, 2-1-3, Bunka, Sumida-ku, Tokyo, 131-8501, Japan
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FT-IR Transflection Micro-Spectroscopy Study on Normal Human Breast Cells after Exposure to a Proton Beam. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11020540] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Fourier transform infrared micro-spectroscopy (μ-FT-IR) is nowadays considered a valuable tool for investigating the changes occurring in human cells after exposure to ionizing radiation. Recently, considerable attention has been devoted to the use of this optical technique in the study of cells exposed to proton beams, that are being increasingly adopted in cancer therapy. Different experimental configurations are used for proton irradiation and subsequent spectra acquisition. To facilitate the use of μ-FT-IR, it may be useful to investigate new experimental approaches capable of speeding up and simplifying the irradiation and measurements phases. Here, we propose the use of low-e-substrates slides for cell culture, allowing the irradiation and spectra acquisition in transflection mode in a fast and direct way. In recent years, there has been a wide debate about the validity of these supports, but many researchers agree that the artifacts due to the presence of the electromagnetic standing wave effects are negligible in many practical cases. We investigated human normal breast cells (MCF-10 cell line) fixed immediately after the irradiation with graded proton radiation doses (0, 0.5, 2, and 4 Gy). The spectra obtained in transflection geometry showed characteristics very similar to those present in the spectra acquired in transmission geometry and confirm the validity of the chosen approach. The analysis of spectra indicates the occurrence of significant changes in DNA and lipids components of cells. Modifications in protein secondary structure are also evidenced.
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Kudo S, Nakashima S. Water retention capabilities of collagen, gelatin and peptide as studied by IR/QCM/RH system. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 241:118619. [PMID: 32622049 DOI: 10.1016/j.saa.2020.118619] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 06/10/2020] [Accepted: 06/13/2020] [Indexed: 06/11/2023]
Abstract
In this study, water retention properties of triple helix collagen, gelatin (separated single chains) and peptide (broken peptide fragments) were studied by using IR micro-spectroscopy equipped with a relative humidity (RH) control system and quartz crystal microbalance (QCM). Adsorbed water ratios (wt%) are found to be in the order of collagen, gelatin and peptide (at about RH = 60%, 22 wt% for collagen, 14 wt% for gelatin and 9 wt% for peptide). Free water molecules with longer H bonds are the major adsorbed water species for collagen, gelatin and peptide. IR band shifts and changes in normalized band areas of functional groups are generally larger for collagen than gelatin and peptide, indicating larger interactions of water molecules with functional groups such as aliphatic CH2, CH3, amides, COO- and C-O for collagen. Relations between normalized band areas show that water molecules are interacting with aliphatic CH species and C-O bonds of collagen. Since the fibril structures of collagen triple helices are reported to be cross-linked by sugars, water molecules can be attracted to polar C-O bonds of sugars linking collagen triple helices in fibrils and they are interacting with adjacent aliphatic CH side chains on the surface of fibrils.
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Affiliation(s)
- Sachie Kudo
- Department of Earth and Space Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan; Taki Chemical Co., Ltd., 346 Miyanishi, Harima-cho, Kako-gun, Hyogo 675-0145, Japan
| | - Satoru Nakashima
- Department of Earth and Space Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan; Faculty of Environmental and Urban Engineering, Kansai University, Yamate-cho 3-3-35, Suita-shi, Osaka 564-8680, Japan; Research Institute for Natural Environment, Science and Technology (RINEST), Tarumi-cho 3-6-32 Maison Esaka 1F, Suita-shi, Osaka 564-0062, Japan.
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An FTIR Microspectroscopy Ratiometric Approach for Monitoring X-ray Irradiation Effects on SH-SY5Y Human Neuroblastoma Cells. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10082974] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The ability of Fourier transform infrared (FTIR) spectroscopy in analyzing cells at a molecular level was exploited for investigating the biochemical changes induced in protein, nucleic acid, lipid, and carbohydrate content of cells after irradiation by graded X-ray doses. Infrared spectra from in vitro SH-SY5Y neuroblastoma cells following exposure to X-rays (0, 2, 4, 6, 8, 10 Gy) were analyzed using a ratiometric approach by evaluating the ratios between the absorbance of significant peaks. The spectroscopic investigation was performed on cells fixed immediately (t0 cells) and 24 h (t24 cells) after irradiation to study both the initial radiation-induced damage and the effect of the ensuing cellular repair processes. The analysis of infrared spectra allowed us to detect changes in proteins, lipids, and nucleic acids attributable to X-ray exposure. The ratiometric analysis was able to quantify changes for the protein, lipid, and DNA components and to suggest the occurrence of apoptosis processes. The ratiometric study of Amide I band indicated also that the secondary structure of proteins was significantly modified. The comparison between the results from t0 and t24 cells indicated the occurrence of cellular recovery processes. The adopted approach can provide a very direct way to monitor changes for specific cellular components and can represent a valuable tool for developing innovative strategies to monitor cancer radiotherapy outcome.
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Kudo S, Nakashima S. Changes in IR band areas and band shifts during water adsorption to lecithin and ceramide. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 228:117779. [PMID: 31732473 DOI: 10.1016/j.saa.2019.117779] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 09/20/2019] [Accepted: 11/08/2019] [Indexed: 06/10/2023]
Abstract
Adsorption of water to a phospholipid (lecithin) and a ceramide were studied by IR microspectroscopy equipped with a humidity control system and quartz crystal microbalance (QCM). The water weight ratios increase up to 12.2 wt% for lecithin and 1.2 wt% for ceramide at RH ~80%, with linear correlations with infrared OH (+NH) band areas. For lecithin, the 1230 cm-1 band (PO2-) and the 1735 cm-1 band (CO) shift to lower wavenumbers, while the 1060 cm-1 band (PO2-, POC) shift to higher wavenumber with RH. Band areas of phosphates (1230 and 1060 cm-1) increase with RH showing positive relations with the band area of bound water. Bound water molecules with shorter H bonds might be bound to these phosphate groups. Band areas of aliphatic CHs are negatively correlated with the increasing adsorption of free water. Free water molecules with longer H bonds might interact loosely with aliphatic chains of lecithin. For ceramide, only the 1045 cm-1 band (CO) shows a small red shift at higher RHs than 60%, indicating adsorption of bound water to CO bonds. Amounts of water molecules adsorbed to ceramide are very limited due to few adsorption of free water.
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Affiliation(s)
- Sachie Kudo
- Department of Earth and Space Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan; Taki Chemical Co., Ltd., 346 Miyanishi, Harima-cho, Kako-gun, Hyogo 675-0145, Japan
| | - Satoru Nakashima
- Department of Earth and Space Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan.
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Study of the conformational behaviour of trehalose mycolates by FT-IR spectroscopy. Chem Phys Lipids 2019; 223:104789. [DOI: 10.1016/j.chemphyslip.2019.104789] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 06/22/2019] [Accepted: 06/25/2019] [Indexed: 11/24/2022]
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12
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Gordon BR, Martin DE, Bambery KR, Motti CA. Chemical imaging of a Symbiodinium sp. cell using synchrotron infrared microspectroscopy: a feasibility study. J Microsc 2017; 270:83-91. [PMID: 29064560 DOI: 10.1111/jmi.12658] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 09/22/2017] [Indexed: 11/27/2022]
Abstract
The symbiotic relationship between corals and Symbiodinium spp. is the key to the success and survival of coral reef ecosystems the world over. Nutrient exchange and chemical communication between the two partners provides the foundation of this key relationship, yet we are far from a complete understanding of these processes. This is due, in part, to the difficulties associated with studying an intracellular symbiosis at the small spatial scales required to elucidate metabolic interactions between the two partners. This feasibility study, which accompanied a more extensive investigation of fixed Symbiodinium cells (data unpublished), examines the potential of using synchrotron radiation infrared microspectroscopy (SR-IRM) for exploring metabolite localisation within a single Symbiodinium cell. In doing so, three chemically distinct subcellular regions of a single Symbiodinium cell were established and correlated to cellular function based on assignment of diagnostic chemical classes.
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Affiliation(s)
- B R Gordon
- College of Public Health, Medical and Veterinary Science, James Cook University, Townsville, Queensland, Australia
| | - D E Martin
- Australian Synchrotron, Clayton, Victoria, Australia
| | - K R Bambery
- Australian Synchrotron, Clayton, Victoria, Australia
| | - C A Motti
- The Australian Institute of Marine Science, Cape Cleveland, Queensland, Australia
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Abstract
Lipids self-assemble into diverse supramolecular structures that exhibit thermotropic and/or lyotropic behavior. Lyotropic mesophases, where membranes conform to periodic minimal surfaces dividing two nonpenetrating aqueous subspaces, are arguably one of the most intriguing phases of lipid materials. Traditional 3D bicontinuous cubic lipid materials appear as a polycrystal of varying degrees of order. When exposed to water, the properties of the molecular building blocks of the membrane determine specific swelling limits setting the lattice dimensions at about 15 nm. This limited swelling severely impairs their application as delivery vehicles of large drugs or as matrices for guiding protein crystallization. We report the discovery of self-assembly strategies leading to the emergence of lipid bicontinuous single crystals with unprecedented swelling capacity. The conventional strategy to increase unit cell size is tweaking membrane composition to include charged building blocks, a process to achieve electrostatic-driven swelling. In this paper, we demonstrate that controlling self-assembly external conditions when coupled to membrane composition yields 3D bicontinuous cubic phases that swell up to lattice dimensions of 68 nm. Importantly, and contrary to what is perceived for soft lyotropic materials in general, the self-assembly methodology enables the development of large super-swelled monocrystals. Utilizing small-angle X-ray scattering and cryoelectron microscopy, we underpin three crucial factors dictating the stabilization of super-swelled lipid bicontinuous cubic single crystals: (i) organic solvent drying speed, (ii) membrane charge density, and (iii) polyethylene glycol-conjugated lipids amount.
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Sundaramoorthi K, Sethu G, Ethirajulu S, Raja Marthandam P. Efficacy of metformin in human single hair fibre by ATR-FTIR spectroscopy coupled with statistical analysis. J Pharm Biomed Anal 2017; 136:10-13. [DOI: 10.1016/j.jpba.2016.11.057] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 11/11/2016] [Accepted: 11/18/2016] [Indexed: 10/20/2022]
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15
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Takahashi T, Yoshida S. A highly resistant structure between cuticle and cortex of human hair. Int J Cosmet Sci 2016; 39:327-336. [DOI: 10.1111/ics.12380] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 11/03/2016] [Indexed: 11/26/2022]
Affiliation(s)
- T. Takahashi
- R&D - Development Research; Kao Corporation; 2-1-3, Bunka Sumida-ku Tokyo 131-8501 Japan
| | - S. Yoshida
- Department of Biomolecular Science; Faculty of Engineering; Gifu University; 1-1, Yanagido Gifu 501-1193 Japan
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16
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Takahashi T, Mamada A, Breakspear S, Itou T, Tanji N. Age-dependent changes in damage processes of hair cuticle. J Cosmet Dermatol 2015; 14:2-8. [DOI: 10.1111/jocd.12129] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/11/2014] [Indexed: 11/29/2022]
Affiliation(s)
- Toshie Takahashi
- R&D - Development Research - Hair Care Products Research; Kao Corporation; Tokyo Japan
- The United Graduate School of Drug Discovery and Medical Information Sciences; Gifu University; Gifu Japan
| | - Akira Mamada
- R&D - Development Research - Hair Care Products Research; Kao Corporation; Tokyo Japan
| | - Steven Breakspear
- R&D - Development Research - Hair Care Products Research; Kao Corporation; Tokyo Japan
| | - Takashi Itou
- R&D - Development Research - Hair Care Products Research; Kao Corporation; Tokyo Japan
| | - Noriyuki Tanji
- R&D - Development Research - Hair Care Products Research; Kao Corporation; Tokyo Japan
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