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Kim W, Yiu CCY, Wang Y, Zhou W, Selomulya C. Toward Diverse Plant Proteins for Food Innovation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2408150. [PMID: 39119828 DOI: 10.1002/advs.202408150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2024] [Indexed: 08/10/2024]
Abstract
This review highlights the development of plant proteins from a wide variety of sources, as most of the research and development efforts to date have been limited to a few sources including soy, chickpea, wheat, and pea. The native structure of plant proteins during production and their impact on food colloids including emulsions, foams, and gels are considered in relation to their fundamental properties, while highlighting the recent developments in the production and processing technologies with regard to their impacts on the molecular properties and aggregation of the proteins. The ability to quantify structural, morphological, and rheological properties can provide a better understanding of the roles of plant proteins in food systems. The applications of plant proteins as dairy and meat alternatives are discussed from the perspective of food structure formation. Future directions on the processing of plant proteins and potential applications are outlined to encourage the generation of more diverse plant-based products.
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Affiliation(s)
- Woojeong Kim
- School of Chemical Engineering, UNSW, Sydney, NSW, 2052, Australia
| | | | - Yong Wang
- School of Chemical Engineering, UNSW, Sydney, NSW, 2052, Australia
| | - Weibiao Zhou
- Department of Food Science and Technology, National University of Singapore, Singapore, 117542, Singapore
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Srinivasan N, Thangavelu K, Sekar A, Sanjeev B, Uthandi S. Aspergillus caespitosus ASEF14, an oleaginous fungus as a potential candidate for biodiesel production using sago processing wastewater (SWW). Microb Cell Fact 2021; 20:179. [PMID: 34503534 PMCID: PMC8427899 DOI: 10.1186/s12934-021-01667-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Accepted: 08/25/2021] [Indexed: 11/10/2022] Open
Abstract
Background Oleaginous microorganisms are sustainable alternatives for the production of biodiesel. Among them, oleaginous fungi are known for their rapid growth, short life cycles, no light requirement, easy scalability, and the ability to grow in cheap organic resources. Among all the sources used for biodiesel production, industrial wastewater streams have been least explored. We used oleaginous fungi to decontaminate sago processing wastewater and produce biodiesel. Results Among the 15 isolates screened for lipid production and starch utilization using the Nile red staining assay and amylase plate screening, three isolates accumulated > 20% (w/w) of their dry cell mass as lipids. The isolate ASEF14 exhibited the highest lipid accumulation (> 40%) and was identified as Aspergillus caespitosus based on the 28S rRNA gene sequencing. The maximum lipid content of 54.4% in synthetic medium (SM) and 37.2% in sago processing wastewater (SWW) was produced by the strain. The Fourier-transform infrared (FTIR) spectroscopy of the fungal oil revealed the presence of functional peaks corresponding to major lipids. Principal component analysis (PCA) of the FTIR data revealed major changes in the fatty acid composition during the transition from the growth phase (Days 1–3) to the lipid accumulation phase (Days 4–7). The fatty acid methyl esters (FAME) analysis of fungal oil from SWW contained 43.82% and 9.62% of saturated and monounsaturated fatty acids, respectively. The composition and percentage of individual FAME derived from SWW were different from SM, indicating the effect of nutrient and fermentation time. The fuel attributes of the SM- and SWW-grown fungal biodiesel (kinematic viscosity, iodine value, cetane number, cloud and pour point, linolenic acid content, FA > 4 double bonds) met international (ASTM D6751, EN 14214) and national (IS 15607) biodiesel standards. In addition to biodiesel production, the strain removed various contaminants such as total solids (TS), total suspended solids (TSS), total dissolved solids (TDS), dissolved oxygen (DO), chemical oxygen demand (COD), biological oxygen demand (BOD), total nitrogen (TN), total phosphorus (TP), and cyanide up to 58.6%, 53.0%, 35.2%, 94.5%, 89.3%, 91.3%, 74.0%, 47.0%, and 53.84%, respectively, from SWW. Conclusion These findings suggested that A. caespitosus ASEF14 is a potential candidate with high lipid accumulating ability (37.27%), capable of using SWW as the primary growth medium. The medium and incubation time alter the FAME profile of this fungus. The physical properties of fungal oil were in accordance with the biodiesel standards. Moreover, it decontaminated SWW by reducing several polluting nutrients and toxicants. The fungal biodiesel produced by this cost-effective method could serve as an alternate path to meet global energy demand.
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Affiliation(s)
- Naganandhini Srinivasan
- Biocatalysts Laboratory, Deptartment of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, 641 003, India
| | - Kiruthika Thangavelu
- Department of Renewable Energy Engineering, Agricultural Engineering College & Research Institute, Tamil Nadu Agricultural University, Coimbatore, 641 003, India
| | - Ashika Sekar
- Biocatalysts Laboratory, Deptartment of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, 641 003, India
| | - B Sanjeev
- Biocatalysts Laboratory, Deptartment of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, 641 003, India
| | - Sivakumar Uthandi
- Biocatalysts Laboratory, Deptartment of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, 641 003, India.
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Tracking biochemical changes induced by iron loading in AML12 cells with synchrotron live cell, time-lapse infrared microscopy. Biochem J 2021; 478:1227-1239. [PMID: 33616158 DOI: 10.1042/bcj20200653] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 02/01/2021] [Accepted: 02/22/2021] [Indexed: 12/12/2022]
Abstract
Hepatocytes are essential for maintaining the homeostasis of iron and lipid metabolism in mammals. Dysregulation of either iron or lipids has been linked with serious health consequences, including non-alcoholic fatty liver disease (NAFLD). Considered the hepatic manifestation of metabolic syndrome, NAFLD is characterised by dysregulated lipid metabolism leading to a lipid storage phenotype. Mild to moderate increases in hepatic iron have been observed in ∼30% of individuals with NAFLD; however, direct observation of the mechanism behind this increase has remained elusive. To address this issue, we sought to determine the metabolic consequences of iron loading on cellular metabolism using live cell, time-lapse Fourier transform infrared (FTIR) microscopy utilising a synchrotron radiation source to track biochemical changes. The use of synchrotron FTIR is non-destructive and label-free, and allowed observation of spatially resolved, sub-cellular biochemical changes over a period of 8 h. Using this approach, we have demonstrated that iron loading in AML12 cells induced perturbation of lipid metabolism congruent with steatosis development. Iron-loaded cells had approximately three times higher relative ester carbonyl concentration compared with controls, indicating an accumulation of triglycerides. The methylene/methyl ratio qualitatively suggests the acyl chain length of fatty acids in iron-loaded cells increased over the 8 h period of monitoring compared with a reduction observed in the control cells. Our findings provide direct evidence that mild to moderate iron loading in hepatocytes drives de novo lipid synthesis, consistent with a role for iron in the initial hepatic lipid accumulation that leads to the development of hepatic steatosis.
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Mazarakis N, Vongsvivut J, Bambery KR, Ververis K, Tobin MJ, Royce SG, Samuel CS, Snibson KJ, Licciardi PV, Karagiannis TC. Investigation of molecular mechanisms of experimental compounds in murine models of chronic allergic airways disease using synchrotron Fourier-transform infrared microspectroscopy. Sci Rep 2020; 10:11713. [PMID: 32678217 PMCID: PMC7366655 DOI: 10.1038/s41598-020-68671-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 06/29/2020] [Indexed: 12/31/2022] Open
Abstract
The ovalbumin-induced (OVA) chronic allergic airways murine model is a well-established model for investigating pre-clinical therapies for chronic allergic airways diseases, such as asthma. Here, we examined the effects of several experimental compounds with potential anti-asthmatic effects including resveratrol (RV), relaxin (RLN), l-sulforaphane (LSF), valproic acid (VPA), and trichostatin A (TSA) using both a prevention and reversal model of chronic allergic airways disease. We undertook a novel analytical approach using focal plane array (FPA) and synchrotron Fourier-transform infrared (S-FTIR) microspectroscopic techniques to provide new insights into the mechanisms of action of these experimental compounds. Apart from the typical biological effects, S-FTIR microspectroscopy was able to detect changes in nucleic acids and protein acetylation. Further, we validated the reduction in collagen deposition induced by each experimental compound evaluated. Although this has previously been observed with conventional histological methods, the S-FTIR technique has the advantage of allowing identification of the type of collagen present. More generally, our findings highlight the potential utility of S-FTIR and FPA-FTIR imaging techniques in enabling a better mechanistic understanding of novel asthma therapeutics.
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Affiliation(s)
- Nadia Mazarakis
- Epigenomic Medicine Laboratory, Department of Diabetes, Central Clinical School, Monash University, Alfred Centre, 99 Commercial Road, Melbourne, VIC, 3004, Australia.,Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, VIC, 3010, Australia.,Murdoch Children's Research Institute, Melbourne, VIC, 3004, Australia
| | | | | | - Katherine Ververis
- Epigenomic Medicine Laboratory, Department of Diabetes, Central Clinical School, Monash University, Alfred Centre, 99 Commercial Road, Melbourne, VIC, 3004, Australia
| | - Mark J Tobin
- ANSTO Australian Synchrotron, Clayton, VIC, 3168, Australia
| | - Simon G Royce
- Department of Pharmacology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC, 3168, Australia
| | - Chrishan S Samuel
- Department of Pharmacology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC, 3168, Australia
| | - Kenneth J Snibson
- Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Paul V Licciardi
- Murdoch Children's Research Institute, Melbourne, VIC, 3004, Australia.,Department of Paediatrics, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Tom C Karagiannis
- Epigenomic Medicine Laboratory, Department of Diabetes, Central Clinical School, Monash University, Alfred Centre, 99 Commercial Road, Melbourne, VIC, 3004, Australia. .,Department of Clinical Pathology, University of Melbourne, Parkville, VIC, 3010, Australia.
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Chan KLA, Altharawi A, Fale P, Song CL, Kazarian SG, Cinque G, Untereiner V, Sockalingum GD. Transmission Fourier Transform Infrared Spectroscopic Imaging, Mapping, and Synchrotron Scanning Microscopy with Zinc Sulfide Hemispheres on Living Mammalian Cells at Sub-Cellular Resolution. APPLIED SPECTROSCOPY 2020; 74:544-552. [PMID: 32031010 DOI: 10.1177/0003702819898275] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Fourier transform infrared (FT-IR) spectroscopic imaging and microscopy of single living cells are established label-free technique for the study of cell biology. The constant driver to improve the spatial resolution of the technique is due to the diffraction limit given by infrared (IR) wavelength making subcellular study challenging. Recently, we have reported, with the use of a prototype zinc sulfide (ZnS) transmission cell made of two hemispheres, that the spatial resolution is improved by the factor of the refractive index of ZnS, achieving a λ/2.7 spatial resolution using the synchrotron-IR microscopy with a 36× objective with numerical aperture of 0.5. To refine and to demonstrate that the ZnS hemisphere transmission device can be translated to standard bench-top FT-IR imaging systems, we have, in this work, modified the device to achieve a more precise path length, which has improved the spectral quality of the living cells, and showed for the first time that the device can be applied to study live cells with three different bench-top FT-IR imaging systems. We applied focal plane array (FPA) imaging, linear array, and a synchrotron radiation single-point scanning method and demonstrated that in all cases, subcellular details of individual living cells can be obtained. Results have shown that imaging with the FPA detector can measure the largest area in a given time, while measurements from the scanning methods produced a smoother image. Synchrotron radiation single-point mapping produced the best quality image and has the flexibility to introduce over sampling to produce images of cells with great details, but it is time consuming in scanning mode. In summary, this work has demonstrated that the ZnS hemispheres can be applied in all three spectroscopic approaches to improve the spatial resolution without any modification to the existing microscopes.
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Affiliation(s)
- Ka Lung Andrew Chan
- Institute of Pharmaceutical Science, School of Cancer and Pharmaceutical Sciences, King's College London, UK
| | - Ali Altharawi
- Institute of Pharmaceutical Science, School of Cancer and Pharmaceutical Sciences, King's College London, UK
| | - Pedro Fale
- Faculty of Sciences, BioISI-Biosystems & Integrative Sciences Institute, University of Lisboa, Lisbon, Portugal
| | - Cai Li Song
- Department of Chemical Engineering, Imperial College London, London, UK
| | - Sergei G Kazarian
- Department of Chemical Engineering, Imperial College London, London, UK
| | | | - Valérie Untereiner
- Plateforme en Imagerie Cellulaire et Tissulaire (PICT), University of Reims Champagne-Ardenne, Reims, France
- University of Reims Champagne-Ardenne, Pharmacy, Reims, France
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Vongsvivut J, Pérez-Guaita D, Wood BR, Heraud P, Khambatta K, Hartnell D, Hackett MJ, Tobin MJ. Synchrotron macro ATR-FTIR microspectroscopy for high-resolution chemical mapping of single cells. Analyst 2019; 144:3226-3238. [DOI: 10.1039/c8an01543k] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Coupling synchrotron IR beam to an ATR element enhances spatial resolution suited for high-resolution single cell analysis in biology, medicine and environmental science.
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Affiliation(s)
| | | | - Bayden R. Wood
- Centre for Biospectroscopy
- Monash University
- Clayton
- Australia
| | - Philip Heraud
- Centre for Biospectroscopy
- Monash University
- Clayton
- Australia
- Department of Microbiology and Biomedicine Discovery Institute
| | - Karina Khambatta
- Curtin Institute for Functional Molecules and Interfaces
- School of Molecular and Life Sciences
- Curtin University
- Perth
- Australia
| | - David Hartnell
- Curtin Institute for Functional Molecules and Interfaces
- School of Molecular and Life Sciences
- Curtin University
- Perth
- Australia
| | - Mark J. Hackett
- Curtin Institute for Functional Molecules and Interfaces
- School of Molecular and Life Sciences
- Curtin University
- Perth
- Australia
| | - Mark J. Tobin
- Infrared Microspectroscopy (IRM) Beamline
- Australian Synchrotron
- Clayton
- Australia
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Chan KLA, Fale PLV, Atharawi A, Wehbe K, Cinque G. Subcellular mapping of living cells via synchrotron microFTIR and ZnS hemispheres. Anal Bioanal Chem 2018; 410:6477-6487. [PMID: 30032447 PMCID: PMC6132686 DOI: 10.1007/s00216-018-1245-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 06/25/2018] [Accepted: 07/04/2018] [Indexed: 11/13/2022]
Abstract
FTIR imaging is a label-free, non-destructive method valuably exploited in the study of the biological process in living cells. However, the long wavelength/low spatial resolution and the strong absorbance of water are still key constrains in the application of IR microscopy ex vivo. In this work, a new retrofit approach based on the use of ZnS hemispheres is introduced to significantly improve the spatial resolution on live cell FTIR imaging. By means of two high refractive index domes sandwiching the sample, a lateral resolution close to 2.2 μm at 6 μm wavelength has been achieved, i.e. below the theoretical diffraction limit in air and more than twice the improvement (to ~λ/2.7) from our previous attempt using CaF2 lenses. The ZnS domes also allowed an extended spectral range to 950 cm−1, in contrast to the cut-off at 1050 cm−1 using CaF2. In combination with synchrotron radiation source, microFTIR provides an improved signal-to-noise ratio through the circa 12 μm thin layer of medium, thus allowing detailed distribution of lipids, protein and nucleic acid in the surround of the nucleus of single living cells. Endoplasmic reticula were clearly shown based on the lipid ν(CH) and ν(C=O) bands, while the DNA was imaged based on the ν(PO2−) band highlighting the nucleus region. This work has also included a demonstration of drug (doxorubicin) in cell measurement to highlight the potential of this approach. Graphical abstract ![]()
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Affiliation(s)
- K L Andrew Chan
- Institute of Pharmaceutical Science, School of Cancer and Pharmaceutical Science, King's College London, London, SE1 9NH, UK.
| | - Pedro L V Fale
- Institute of Pharmaceutical Science, School of Cancer and Pharmaceutical Science, King's College London, London, SE1 9NH, UK.,Center of Chemistry and Biochemistry, Faculty of Sciences, University of Lisbon, 1749-016, Lisbon, Portugal
| | - Ali Atharawi
- Institute of Pharmaceutical Science, School of Cancer and Pharmaceutical Science, King's College London, London, SE1 9NH, UK
| | - Katia Wehbe
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, OX11 0DE, UK
| | - Gianfelice Cinque
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, OX11 0DE, UK
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Truong VK, Vongsvivut J, Geeganagamage NM, Tobin MJ, Luque P, Baulin V, Werner M, Maclaughlin S, Crawford RJ, Ivanova EP. Study of melanin localization in the mature male Calopteryx haemorrhoidalis damselfly wings. JOURNAL OF SYNCHROTRON RADIATION 2018; 25:874-877. [PMID: 29714199 DOI: 10.1107/s1600577518004460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 03/16/2018] [Indexed: 06/08/2023]
Abstract
Damselflies Calopteryx haemorrhoidalis exhibiting black wings are found in the western Mediterranean, Algeria, France, Italy, Spain and Monaco. Wing pigmentation is caused by the presence of melanin, which is involved in physiological processes including defence reactions, wound healing and sclerotization of the insect. Despite the important physiological roles of melanin, the presence and colour variation among males and females of the C. haemorrhoidalis species and the localization of the pigment within the wing membrane remain poorly understood. In this study, infrared (IR) microspectroscopy, coupled with the highly collimated synchrotron IR beam, was employed in order to identify the distribution of the pigments in the wings at a high spatial resolution. It was found that the melanin is localized in the procuticle of the C. haemorrhoidalis damselfly wings, distributed homogeneously within this layer, and not associated with the lipids of the epicuticle.
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Affiliation(s)
- Vi Khanh Truong
- Faculty of Science, Engineering and Technology, Swinburne University of Technology, PO Box 218, Hawthorn, VIC 3122, Australia
| | | | | | - Mark J Tobin
- Australian Synchrotron, 800 Blackburn Road, Clayton, VIC 3168, Australia
| | - Pere Luque
- Museu de les Terres de l'Ebre, 34 Gran Capità, 43870 Amposta, Spain
| | - Vladimir Baulin
- Departament d'Enginyeria Quimica, Universitat Rovira i Virgili, 26 Avinguda dels Paisos Catalans, 43007 Tarragona, Spain
| | - Marco Werner
- Departament d'Enginyeria Quimica, Universitat Rovira i Virgili, 26 Avinguda dels Paisos Catalans, 43007 Tarragona, Spain
| | | | - Russell J Crawford
- College of Science, Engineering and Health, RMIT University, Melbourne 3001, Victoria, Australia
| | - Elena P Ivanova
- Faculty of Science, Engineering and Technology, Swinburne University of Technology, PO Box 218, Hawthorn, VIC 3122, Australia
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Kosa G, Kohler A, Tafintseva V, Zimmermann B, Forfang K, Afseth NK, Tzimorotas D, Vuoristo KS, Horn SJ, Mounier J, Shapaval V. Microtiter plate cultivation of oleaginous fungi and monitoring of lipogenesis by high-throughput FTIR spectroscopy. Microb Cell Fact 2017; 16:101. [PMID: 28599651 PMCID: PMC5466753 DOI: 10.1186/s12934-017-0716-7] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 06/05/2017] [Indexed: 02/06/2023] Open
Abstract
Background Oleaginous fungi can accumulate lipids by utilizing a wide range of waste substrates. They are an important source for the industrial production of omega-6 polyunsaturated fatty acids (gamma-linolenic and arachidonic acid) and have been suggested as an alternative route for biodiesel production. Initial research steps for various applications include the screening of fungi in order to find efficient fungal producers with desired fatty acid composition. Traditional cultivation methods (shake flask) and lipid analysis (extraction-gas chromatography) are not applicable for large-scale screening due to their low throughput and time-consuming analysis. Here we present a microcultivation system combined with high-throughput Fourier transform infrared (FTIR) spectroscopy for efficient screening of oleaginous fungi. Results The microcultivation system enables highly reproducible fungal fermentations throughout 12 days of cultivation. Reproducibility was validated by FTIR and HPLC data. Analysis of FTIR spectral ester carbonyl peaks of fungal biomass offered a reliable high-throughput at-line method to monitor lipid accumulation. Partial least square regression between gas chromatography fatty acid data and corresponding FTIR spectral data was used to set up calibration models for the prediction of saturated fatty acids, monounsaturated fatty acids, polyunsaturated fatty acids, unsaturation index, total lipid content and main individual fatty acids. High coefficients of determination (R2 = 0.86–0.96) and satisfactory residual predictive deviation of cross-validation (RPDCV = 2.6–5.1) values demonstrated the goodness of these models. Conclusions We have demonstrated in this study, that the presented microcultivation system combined with rapid, high-throughput FTIR spectroscopy is a suitable screening platform for oleaginous fungi. Sample preparation for FTIR measurements can be automated to further increase throughput of the system. Electronic supplementary material The online version of this article (doi:10.1186/s12934-017-0716-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Gergely Kosa
- Faculty of Science and Technology, Norwegian University of Life Sciences, Postbox 5003, 1432, Ås, Norway.
| | - Achim Kohler
- Faculty of Science and Technology, Norwegian University of Life Sciences, Postbox 5003, 1432, Ås, Norway
| | - Valeria Tafintseva
- Faculty of Science and Technology, Norwegian University of Life Sciences, Postbox 5003, 1432, Ås, Norway
| | - Boris Zimmermann
- Faculty of Science and Technology, Norwegian University of Life Sciences, Postbox 5003, 1432, Ås, Norway
| | - Kristin Forfang
- Faculty of Science and Technology, Norwegian University of Life Sciences, Postbox 5003, 1432, Ås, Norway
| | | | | | - Kiira S Vuoristo
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Postbox 5003, 1432, Ås, Norway
| | - Svein Jarle Horn
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Postbox 5003, 1432, Ås, Norway
| | - Jerome Mounier
- Université de Brest, EA3882 Laboratoire Universitaire de Biodiversité et Ecologie Microbienne, IBSAM, ESIAB, Technopôle Brest Iroise, 29280, Plouzané, France
| | - Volha Shapaval
- Faculty of Science and Technology, Norwegian University of Life Sciences, Postbox 5003, 1432, Ås, Norway
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Pitfalls and promises in FTIR spectromicroscopy analyses to monitor iron-mediated DNA damage in sperm. Reprod Toxicol 2016; 61:39-46. [PMID: 26923261 DOI: 10.1016/j.reprotox.2016.02.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 02/01/2016] [Accepted: 02/19/2016] [Indexed: 01/06/2023]
Abstract
Many drugs, chemicals, and environmental factors can impair sperm functionality by inducing DNA damage, one of the important causes of reduced fertility potential. The use of vibrational spectromicroscopy represents a promising approach for monitoring DNA integrity in sperm, although some limitations exist, depending from the experimental conditions. Here, we report that when using FTIR spectromicroscopy to reveal oxidative stress mediated by Fenton's reaction on hydrated sperm samples, DNA damage interpretation is partially compromised by unexpected cell surface precipitates. The precipitates give a broad band in the 1150-1000cm(-1) infrared region, which partially covers one of the signatures of DNA (phosphate stretching bands), and are detected as iron and oxygen containing material when using XRF spectroscopy. On the other hand, the analyses further support the potential of FTIR spectromicroscopy to reveal cellular oxidative damage events such as lipid peroxidation, protein misfolding and aggregations, as well as DNA strain breaks.
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