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Monaghan JF, Cullen D, Wynne C, Lyng FM, Meade AD. Effect of pre-analytical variables on Raman and FTIR spectral content of lymphocytes. Analyst 2023; 148:5422-5434. [PMID: 37750362 DOI: 10.1039/d3an00686g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/27/2023]
Abstract
The use of Fourier transform infrared (FTIR) and Raman spectroscopy (RS) for the analysis of lymphocytes in clinical applications is increasing in the field of biomedicine. The pre-analytical phase, which is the most vulnerable stage of the testing process, is where most errors and sample variance occur; however, it is unclear how pre-analytical variables affect the FTIR and Raman spectra of lymphocytes. In this study, we evaluated how pre-analytical procedures undertaken before spectroscopic analysis influence the spectral integrity of lymphocytes purified from the peripheral blood of male volunteers (n = 3). Pre-analytical variables investigated were associated with (i) sample preparation, (blood collection systems, anticoagulant, needle gauges), (ii) sample storage (fresh or frozen), and (iii) sample processing (inter-operator variability, time to lymphocyte isolation). Although many of these procedural pre-analytical variables did not alter the spectral signature of the lymphocytes, evidence of spectral effects due to the freeze-thaw cycle, in vitro culture inter-operator variability and the time to lymphocyte isolation was observed. Although FTIR and RS possess clinical potential, their translation into a clinical environment is impeded by a lack of standardisation and harmonisation of protocols related to the preparation, storage, and processing of samples, which hinders uniform, accurate, and reproducible analysis. Therefore, further development of protocols is required to successfully integrate these techniques into current clinical workflows.
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Affiliation(s)
- Jade F Monaghan
- School of Physics, Clinical and Optometric Sciences, Technological University Dublin, Central Quad, City Campus, Grangegorman, D07 XT95, Ireland.
- Radiation and Environmental Science Centre, Focas Research Institute, Technological University Dublin, Aungier Street, D02 HW71, Ireland
| | - Daniel Cullen
- School of Physics, Clinical and Optometric Sciences, Technological University Dublin, Central Quad, City Campus, Grangegorman, D07 XT95, Ireland.
- Radiation and Environmental Science Centre, Focas Research Institute, Technological University Dublin, Aungier Street, D02 HW71, Ireland
| | - Claire Wynne
- School of Biological, Health and Sports Sciences, Technological University Dublin, Central Quad, City Campus, Grangegorman, D07 XT95, Ireland
| | - Fiona M Lyng
- School of Physics, Clinical and Optometric Sciences, Technological University Dublin, Central Quad, City Campus, Grangegorman, D07 XT95, Ireland.
- Radiation and Environmental Science Centre, Focas Research Institute, Technological University Dublin, Aungier Street, D02 HW71, Ireland
| | - Aidan D Meade
- School of Physics, Clinical and Optometric Sciences, Technological University Dublin, Central Quad, City Campus, Grangegorman, D07 XT95, Ireland.
- Radiation and Environmental Science Centre, Focas Research Institute, Technological University Dublin, Aungier Street, D02 HW71, Ireland
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2
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Liu Y, Zhang Z, Chen LE, Bi KE, Yang J, Zhang B, Xin W. High Pressure Thermal Sterilization and ε-Polylysine Synergistically Inactivate Bacillus subtilis Spores by Damaging the Inner Membrane. J Food Prot 2022; 85:390-397. [PMID: 34788461 DOI: 10.4315/jfp-21-354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 11/14/2021] [Indexed: 11/11/2022]
Abstract
ABSTRACT This study was conducted to determine the sterilization effect of a combination of high pressure thermal sterilization (HPTS) and ε-polylysine (ε-PL) on Bacillus subtilis spores. The spores were treated with HPTS (550 MPa at 25, 65, and 75°C) and ε-PL at 0.1 and 0.3%. HPTS and ε-PL synergistically decreased the number of surviving spores and increased the release of the intracellular components in the spore suspension, with the maximal effects from treatment with 550 MPa at 75°C plus 0.3% ε-PL. Maximum fluidity and permeability of the cell inner membrane were observed with 550 MPa at 75°C plus 0.3% ε-PL. Changes in membrane lipids were detected from 3,000 to 2,800 cm-1 by Fourier transform infrared spectroscopy. The results provide new insights into the mechanism by which HPTS and ε-PL synergistically sterilize B. subtilis spores. HIGHLIGHTS
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Affiliation(s)
- Yue Liu
- School of Food and Wine Science, Ningxia University, Yinchuan, 750021, People's Republic of China
| | - Zhong Zhang
- School of Food and Wine Science, Ningxia University, Yinchuan, 750021, People's Republic of China
| | - L E Chen
- School of Food and Wine Science, Ningxia University, Yinchuan, 750021, People's Republic of China
| | - K E Bi
- School of Food and Wine Science, Ningxia University, Yinchuan, 750021, People's Republic of China
| | - Jie Yang
- School of Food and Wine Science, Ningxia University, Yinchuan, 750021, People's Republic of China
| | - Bianfei Zhang
- School of Food and Wine Science, Ningxia University, Yinchuan, 750021, People's Republic of China
| | - Weishan Xin
- School of Food and Wine Science, Ningxia University, Yinchuan, 750021, People's Republic of China
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3
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Nuez-Martínez M, Pedrosa L, Martinez-Rovira I, Yousef I, Diao D, Teixidor F, Stanzani E, Martínez-Soler F, Tortosa A, Sierra À, Gonzalez JJ, Viñas C. Synchrotron-Based Fourier-Transform Infrared Micro-Spectroscopy (SR-FTIRM) Fingerprint of the Small Anionic Molecule Cobaltabis(dicarbollide) Uptake in Glioma Stem Cells. Int J Mol Sci 2021; 22:9937. [PMID: 34576098 PMCID: PMC8466526 DOI: 10.3390/ijms22189937] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/07/2021] [Accepted: 09/10/2021] [Indexed: 12/16/2022] Open
Abstract
The anionic cobaltabis (dicarbollide) [3,3'-Co(1,2-C2B9H11)2]-, [o-COSAN]-, is the most studied icosahedral metallacarborane. The sodium salts of [o-COSAN]- could be an ideal candidate for the anti-cancer treatment Boron Neutron Capture Therapy (BNCT) as it possesses the ability to readily cross biological membranes thereby producing cell cycle arrest in cancer cells. BNCT is a cancer therapy based on the potential of 10B atoms to produce α particles that cross tissues in which the 10B is accumulated without damaging the surrounding healthy tissues, after being irradiated with low energy thermal neutrons. Since Na[o-COSAN] displays a strong and characteristic ν(B-H) frequency in the infrared range 2.600-2.500 cm-1, we studied the uptake of Na[o-COSAN] followed by its interaction with biomolecules and its cellular biodistribution in two different glioma initiating cells (GICs), mesenchymal and proneural respectively, by using Synchrotron Radiation-Fourier Transform Infrared (FTIR) micro-spectroscopy (SR-FTIRM) facilities at the MIRAS Beamline of ALBA synchrotron light source. The spectroscopic data analysis from the bands in the regions of DNA, proteins, and lipids permitted to suggest that after its cellular uptake, Na[o-COSAN] strongly interacts with DNA strings, modifies proteins secondary structure and also leads to lipid saturation. The mapping suggests the nuclear localization of [o-COSAN]-, which according to reported Monte Carlo simulations may result in a more efficient cell-killing effect compared to that in a uniform distribution within the entire cell. In conclusion, we show pieces of evidence that at low doses, [o-COSAN]- translocates GIC cells' membranes and it alters the physiology of the cells, suggesting that Na[o-COSAN] is a promising agent to BNCT for glioblastoma cells.
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Affiliation(s)
- Miquel Nuez-Martínez
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain; (M.N.-M.); (F.T.)
| | - Leire Pedrosa
- Laboratory of Experimental Oncological Neurosurgery, Neurosurgery Service, Hospital Clinic de Barcelona—FCRB, 08036 Barcelona, Spain; (L.P.); (D.D.); (J.J.G.)
| | - Immaculada Martinez-Rovira
- Ionizing Radiation Research Group (GRRI), Physics Department, Universitat Autònoma de Barcelona (UAB), Avinguda de l’Eix Central, Edifici C. Campus de la UAB, 08193 Cerdanyola del Vallès, Spain;
- ALBA-CELLS Synchrotron, MIRAS Beamline, Carrer de la Llum 2-26, 08290 Cerdanyola del Vallès, Spain;
| | - Ibraheem Yousef
- ALBA-CELLS Synchrotron, MIRAS Beamline, Carrer de la Llum 2-26, 08290 Cerdanyola del Vallès, Spain;
| | - Diouldé Diao
- Laboratory of Experimental Oncological Neurosurgery, Neurosurgery Service, Hospital Clinic de Barcelona—FCRB, 08036 Barcelona, Spain; (L.P.); (D.D.); (J.J.G.)
| | - Francesc Teixidor
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain; (M.N.-M.); (F.T.)
| | - Elisabetta Stanzani
- Laboratory of Pharmacology and Brain Pathology, IRCCS Humanitas Research Hospital, 20089 Rozzano, Italy;
| | - Fina Martínez-Soler
- Apoptosis and Cancer Unit, Department of Physiological Sciences, IDIBELL, Faculty of Medicine and Health Sciences, Universitat de Barcelona, 08907 L’Hospitalet del Llobregat, Spain; (F.M.-S.); (A.T.)
| | - Avelina Tortosa
- Apoptosis and Cancer Unit, Department of Physiological Sciences, IDIBELL, Faculty of Medicine and Health Sciences, Universitat de Barcelona, 08907 L’Hospitalet del Llobregat, Spain; (F.M.-S.); (A.T.)
| | - Àngels Sierra
- Laboratory of Experimental Oncological Neurosurgery, Neurosurgery Service, Hospital Clinic de Barcelona—FCRB, 08036 Barcelona, Spain; (L.P.); (D.D.); (J.J.G.)
| | - José Juan Gonzalez
- Laboratory of Experimental Oncological Neurosurgery, Neurosurgery Service, Hospital Clinic de Barcelona—FCRB, 08036 Barcelona, Spain; (L.P.); (D.D.); (J.J.G.)
| | - Clara Viñas
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain; (M.N.-M.); (F.T.)
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Akram Z, Aati S, Alrahlah A, Vohra F, Fawzy A. Longitudinal evaluation of clinical, spectral and tissue degradation biomarkers in progression of periodontitis among cigarette and electronic cigarette smokers. J Dent 2021; 109:103678. [PMID: 33895240 DOI: 10.1016/j.jdent.2021.103678] [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: 02/01/2021] [Revised: 04/16/2021] [Accepted: 04/19/2021] [Indexed: 10/21/2022] Open
Abstract
OBJECTIVES To longitudinally evaluate the periodontal parameters and MMP-8 and CTX (C-terminal crosslinked telopeptide of type I collagen) levels from diseased and healthy sites from cigarette and electronic cigarette (e-cig) smokers and characterize the gingival crevicular fluid (GCF) samples using Raman spectroscopy In addition, to longitudinally determine if MMP-8 and CTX are predictive factors for attachment loss in periodontitis sites. METHODS Sixty periodontally healthy and 60 periodontitis/diseased sites from 30 e-cig and 30 cigarette smokers were monitored at baseline, 3 months, and 6-months. GCF was sampled to study the MMP-8 and CTX concentrations using enzyme-linked immunosorbent assay. Infra-red absorption spectra of GCF were acquired at all time points and processed to identify key functional groups. RESULTS A significantly increased attachment loss was observed at 6 months for both smokers when compared with baseline (p < 0.01). This difference was significantly high for cigarette smokers compared with e-cig users (p < 0.01). MMP-8, CTX, smoking pack-years were significantly correlated with probing depth and clinical attachment loss among both e-cig and cigarette smokers. For MMP-8 and CTX, the periodontitis sites showed a statistically significant difference between e-cig and cigarette smokers at both 3- and 6 months follow-up. From baseline to 6 months follow-up, periodontitis sites from both groups showed higher spectral band intensities with deconvulations and Raman shifts for Amide I and Amide II peaks. CONCLUSION Cigarette smokers showed higher periodontal worsening than e-cig smokers. Smoking, MMP-8, CTX are prognostic factors for clinical attachment loss in cigarette and e-cig smokers. CLINICAL SIGNIFICANCE Data for Raman scattering and spectral information identifying collagen degradation among e-cig and cigarette smokers have been analyzed. This type of analysis proves a robust diagnostic and prognostic tool for periodontal diseases. Smoking, MMP-8, and CTX are prognostic factors for clinical attachment loss in cigarette and e-cig smokers.
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Affiliation(s)
- Zohaib Akram
- UWA Dental School, University of Western Australia, Nedlands, WA, 6009, Australia.
| | - Sultan Aati
- UWA Dental School, University of Western Australia, Nedlands, WA, 6009, Australia
| | - Ali Alrahlah
- Department of Restorative Dental Sciences, College of Dentistry, King Said University, Engineer Abdullah Bugshan Research Chair for Dental and Oral Rehabilitation, College Of Dentistry, Riyadh, Saudi Arabia
| | - Fahim Vohra
- Department of Prosthetic Dental Sciences, College Of Dentistry, King Said University; Engineer Abdullah Bugshan Research Chair for Dental and Oral Rehabilitation, College of Dentistry, Riyadh, Saudi Arabia
| | - Amr Fawzy
- UWA Dental School, University of Western Australia, Nedlands, WA, 6009, Australia
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Srivastava A, Karthick T, Joshi BD, Mishra R, Tandon P, Ayala AP, Ellena J. Spectroscopic (far or terahertz, mid-infrared and Raman) investigation, thermal analysis and biological activity of piplartine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 184:368-381. [PMID: 28538206 DOI: 10.1016/j.saa.2017.05.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 05/03/2017] [Accepted: 05/04/2017] [Indexed: 06/07/2023]
Abstract
Research in the field of medicinal plants including Piper species like long pepper (Piper longum L.- Piperaceae) is increasing all over the world due to its use in traditional and Ayurvedic medicine. Piplartine (piperlongumine, 5,6-dihydro-1-[(2E)-1-oxo-3-(3,4,5-trimethoxyphenyl)-2-propenyl]-2(1H)-pyridinone), a biologically active alkaloid/amide was isolated from the phytochemical investigations of Piper species, as long pepper. This alkaloid has cytotoxic, anti-fungal, anti-diabetic, anti-platelet aggregation, anti-tumoral, anxiolytic, anti-depressant, anti-leishmanial, and genotoxic activities, but, its anticancer property is the most promising and has been widely explored. The main purpose of the work is to present a solid state characterization of PPTN using thermal analysis and vibrational spectroscopy. Quantum mechanical calculations based on the density functional theory was also applied to investigate the molecular conformation and vibrational spectrum, which was compared with experimental results obtained by Raman scattering, far (terahertz) and mid-infrared adsorption spectroscopy. NBO analysis has been performed which predict that most intensive interactions in PPTN are the hyperconjugative interactions between n(1) N6 and π*(O1C7) having delocalization energy of 50.53kcal/mol, Topological parameters have been analyzed using 'AIM' analysis which governs the three bond critical points (BCPs), one di-hydrogen, and four ring critical points (RCPs). MEP surface has been plotted which forecast that the most negative region is associated with the electronegative oxygen atoms (sites for nucleophilic activity). Theoretically, to confirm that the title compound has anti-cancer, anti-diabetic and anti-platelet aggregation activities, it was analyzed by molecular docking interactions with the corresponding target receptors. The obtained values of H-bonding parameters and binding affinity prove that its anti-cancer activity is the more prominent than the other properties.
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Affiliation(s)
- Anubha Srivastava
- Department of Physics, University of Lucknow, University Road, Lucknow 226 007, Uttar Pradesh, India.
| | - T Karthick
- Department of Physics, University of Lucknow, University Road, Lucknow 226 007, Uttar Pradesh, India
| | - B D Joshi
- Department of Physics, Tribhuvan University, Siddhanath Sc. Campus, Nepal 10400, India; Departamento de Física, Universidade Federal do Ceará, C. P. 6030, 60.455-900 Fortaleza, CE, Brazil
| | - Rashmi Mishra
- Department of Physics, University of Lucknow, University Road, Lucknow 226 007, Uttar Pradesh, India; Department of Physics, Seth G.B. Podar College, Nawalgarh, Rajasthan, India
| | - Poonam Tandon
- Department of Physics, University of Lucknow, University Road, Lucknow 226 007, Uttar Pradesh, India.
| | - A P Ayala
- Departamento de Física, Universidade Federal do Ceará, C. P. 6030, 60.455-900 Fortaleza, CE, Brazil
| | - Javier Ellena
- Instituto de Física de São Carlos, Universidade de São Paulo, CP. 369, 13560-970, São Carlos, SP, Brazil
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Suryana M, Shanmugarajah JV, Maniam SM, Grenci G. Soft Lithographic Procedure for Producing Plastic Microfluidic Devices with View-ports Transparent to Visible and Infrared Light. J Vis Exp 2017. [PMID: 28872107 DOI: 10.3791/55884] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Infrared (IR) spectro-microscopy of living biological samples is hampered by the absorption of water in the mid-IR range and by the lack of suitable microfluidic devices. Here, a protocol for the fabrication of plastic microfluidic devices is demonstrated, where soft lithographic techniques are used to embed transparent Calcium Fluoride (CaF2) view-ports in connection with observation chamber(s). The method is based on a replica casting approach, where a polydimethylsiloxane (PDMS) mold is produced through standard lithographic procedures and then used as the template to produce a plastic device. The plastic device features ultraviolet/visible/infrared (UV/Vis/IR) -transparent windows made of CaF2 to allow for direct observation with visible and IR light. The advantages of the proposed method include: a reduced need for accessing a clean room micro-fabrication facility, multiple view-ports, an easy and versatile connection to an external pumping system through the plastic body, flexibility of the design, e.g., open/closed channels configuration, and the possibility to add sophisticated features such as nanoporous membranes.
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Affiliation(s)
- Mona Suryana
- Mechanobiology Institute (MBI), National University of Singapore
| | | | | | - Gianluca Grenci
- Mechanobiology Institute (MBI), National University of Singapore;
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7
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Matias MS, de Sousa BB, da Cunha Pereira DF, Dias EHV, Mamede CCN, de Queiroz MR, Silva ACA, Dantas NO, Soares AM, de Oliveira Costa J, de Oliveira F. BaltDC: purification, characterization and infrared spectroscopy of an antiplatelet DC protein isolated from Bothrops alternatus snake venom. J Venom Anim Toxins Incl Trop Dis 2017; 23:36. [PMID: 28775739 PMCID: PMC5534087 DOI: 10.1186/s40409-017-0126-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 07/12/2017] [Indexed: 12/29/2022] Open
Abstract
Background Snake venoms are a complex mixture of proteins, organic and inorganic compounds. Some of these proteins, enzymatic or non-enzymatic ones, are able to interact with platelet receptors, causing hemostatic disorders. The possible therapeutic potential of toxins with antiplatelet properties may arouse interest in the pharmacological areas. The present study aimed to purify and characterize an antiplatelet DC protein from Bothrops alternatus snake venom. Methods The protein, called BaltDC (DC protein from B. alternatus snake venom), was purified by a combination of ion-exchange chromatography on DEAE-Sephacel column and gel filtration on Sephadex G-75. The molecular mass was estimated by polyacrylamide gel electrophoresis in the presence of sodium dodecyl sulfate (SDS-PAGE). The amino acid sequence of the N-terminal region was carried out by Edman degradation method. Platelet aggregation assays were performed in human platelet-rich plasma (PRP). Infrared (IR) spectroscopy was used in order to elucidate the interactions between BaltDC and platelet membrane. Results BaltDC ran as a single protein band on SDS-PAGE and showed apparent molecular mass of 32 kDa under reducing or non-reducing conditions. The N-terminal region of the purified protein revealed the amino acid sequence IISPPVCGNELLEVGEECDCGTPENCQNECCDA, which showed identity with other snake venom metalloproteinases (SVMPs). BaltDC was devoid of proteolytic, hemorrhagic, defibrinating or coagulant activities, but it showed a specific inhibitory effect on platelet aggregation induced by ristocetin and epinephrine in PRP. IR analysis spectra strongly suggests that PO32− groups, present in BaltDC, form hydrogen bonds with the PO2− groups present in the non-lipid portion of the membrane platelets. Conclusions BaltDC may be of medical interest since it was able to inhibit platelet aggregation.
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Affiliation(s)
- Mariana Santos Matias
- Postgraduate Program in Genetics and Biochemistry, Institute of Genetics and Biochemistry, Federal University of Uberlândia (UFU), Uberlândia, MG Brazil
| | - Bruna Barbosa de Sousa
- Postgraduate Program in Genetics and Biochemistry, Institute of Genetics and Biochemistry, Federal University of Uberlândia (UFU), Uberlândia, MG Brazil.,National Institute of Science and Technology in Nanobiopharmaceutics (N-Biofar), Belo Horizonte, MG Brazil
| | - Déborah Fernanda da Cunha Pereira
- Postgraduate Program in Genetics and Biochemistry, Institute of Genetics and Biochemistry, Federal University of Uberlândia (UFU), Uberlândia, MG Brazil
| | - Edigar Henrique Vaz Dias
- Postgraduate Program in Genetics and Biochemistry, Institute of Genetics and Biochemistry, Federal University of Uberlândia (UFU), Uberlândia, MG Brazil
| | - Carla Cristine Neves Mamede
- Institute of Agricultural Sciences, Federal University of Uberlândia (UFU), Monte Carmelo, MG Brazil.,National Institute of Science and Technology in Nanobiopharmaceutics (N-Biofar), Belo Horizonte, MG Brazil
| | - Mayara Ribeiro de Queiroz
- National Institute of Science and Technology in Nanobiopharmaceutics (N-Biofar), Belo Horizonte, MG Brazil
| | | | | | - Andreimar Martins Soares
- Center for the Study of Biomolecules Applied to Health (CEBio), Oswaldo Cruz Foundation (Fiocruz - Rondônia) and Health Group, Federal University of Rondônia (UNIR), Porto Velho, RO Brazil.,University Center São Lucas (UniSL), Porto Velho, RO Brazil
| | - Júnia de Oliveira Costa
- Postgraduate Program in Genetics and Biochemistry, Institute of Genetics and Biochemistry, Federal University of Uberlândia (UFU), Uberlândia, MG Brazil.,Federal Institute of Education, Science and Technology of Triângulo Mineiro (IFTM), Campus Ituiutaba, Ituiutaba, MG Brazil
| | - Fábio de Oliveira
- Institute of Biomedical Sciences, Federal University of Uberlândia (UFU), Uberlândia, MG Brazil.,National Institute of Science and Technology in Nanobiopharmaceutics (N-Biofar), Belo Horizonte, MG Brazil
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Mihoubi W, Sahli E, Gargouri A, Amiel C. FTIR spectroscopy of whole cells for the monitoring of yeast apoptosis mediated by p53 over-expression and its suppression by Nigella sativa extracts. PLoS One 2017; 12:e0180680. [PMID: 28704406 PMCID: PMC5507515 DOI: 10.1371/journal.pone.0180680] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 06/19/2017] [Indexed: 01/06/2023] Open
Abstract
p53 over expression in yeast results in cell death with typical markers of apoptosis such as DNA fragmentation and phosphatidylserine externalization. We aimed to substitute/supplement classical fluorescent techniques (TUNEL, Annexin V, ROS detection) usually used to detect biochemical changes occurring during yeast apoptosis mediated by p53 over expression and the effect of anti-apoptotic purified molecules from Nigel (Nigella sativa) extracts on these same yeasts by the label free technique of FTIR spectroscopy. The comparison of the entire IR spectra highlighted clear modifications between apoptotic p53-expressing yeasts and normal ones. More precisely, DNA damage was detected by the decrease of band intensities at 1079 and 1048 cm-1. While phosphatidylserine exposure was followed by the increase of νsCH2 and νasCH2 bands of unsaturated fatty acids that were exhibited at 2855 and 2926 cm-1, and the appearance of the C = O ester functional group band at 1740 cm-1. In a second step, this FTIR approach was used to estimate the effect of a purified fraction of the Nigel extract. The modulation of band intensities specific to DNA and membrane status was in agreement with apoptosis supression in presence of the Nigel extracts. FTIR spectroscopy is thus proven to be a very reliable technique to monitor the apoptotic cell death in yeast and to be used as a means of evaluating the biomolecules effect on yeast survival.
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Affiliation(s)
- Wafa Mihoubi
- Laboratoire de Biotechnologie Moléculaire des Eucaryotes, Centre de Biotechnologie de Sfax, Sfax, Tunisia
- * E-mail:
| | - Emna Sahli
- Laboratoire de Biotechnologie Moléculaire des Eucaryotes, Centre de Biotechnologie de Sfax, Sfax, Tunisia
| | - Ali Gargouri
- Laboratoire de Biotechnologie Moléculaire des Eucaryotes, Centre de Biotechnologie de Sfax, Sfax, Tunisia
| | - Caroline Amiel
- Unité de Recherche Aliments Bioprocédés Toxicologie Environnements (UR ABTE) EA 4651, Université de Caen Normandie, Boulevard Maréchal Juin, Caen, France
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Terent'yeva YG, Yashchuk VM, Zaika LA, Snitserova OM, Losytsky MY. The manifestation of optical centers in UV-Vis absorption and luminescence spectra of white blood human cells. Methods Appl Fluoresc 2016; 4:044010. [PMID: 28192303 DOI: 10.1088/2050-6120/4/4/044010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A white blood human cells spectral investigation is presented. The aim of this series of experiments was to obtain and analyze the absorption and luminescence (fluorescence and phosphorescence) spectra at room temperature and at 78 K of newly isolated white blood human cells and their organelles. As a result the optical centers and possible biochemical components that form the studied spectra where identified. Also the differences between the spectra of abnormal cells (B-cell chronic lymphocytic leukemia BCLL) and normal ones were studied for the whole cells and individual organelles.
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10
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Barlev E, Zelig U, Bar O, Segev C, Mordechai S, Kapelushnik J, Nathan I, Flomen F, Kashtan H, Dickman R, Madhala-Givon O, Wasserberg N. A novel method for screening colorectal cancer by infrared spectroscopy of peripheral blood mononuclear cells and plasma. J Gastroenterol 2016; 51:214-21. [PMID: 26112122 DOI: 10.1007/s00535-015-1095-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Accepted: 06/04/2015] [Indexed: 02/04/2023]
Abstract
BACKGROUND Early detection of colorectal cancer (CRC) can reduce mortality and morbidity. Current screening methods include colonoscopy and stool tests, but a simple low-cost blood test would increase compliance. This preliminary study assessed the utility of analyzing the entire bio-molecular profile of peripheral blood mononuclear cells (PBMCs) and plasma using Fourier transform infrared (FTIR) spectroscopy for early detection of CRC. METHODS Blood samples were prospectively collected from 62 candidates for CRC screening/diagnostic colonoscopy or surgery for colonic neoplasia. PBMCs and plasma were separated by Ficoll gradient, dried on zinc selenide slides, and placed under a FTIR microscope. FTIR spectra were analyzed for biomarkers and classified by principal component and discriminant analyses. Findings were compared among diagnostic groups. RESULTS Significant changes in multiple bands that can serve as CRC biomarkers were observed in PBMCs (p = ~0.01) and plasma (p = ~0.0001) spectra. There were minor but statistically significant differences in both blood components between healthy individuals and patients with benign polyps. Following multivariate analysis, the healthy individuals could be well distinguished from patients with CRC, and the patients with benign polyps were mostly distributed as a distinct subgroup within the overlap region. Leave-one-out cross-validation for evaluating method performance yielded an area under the receiver operating characteristics curve of 0.77, with sensitivity 81.5% and specificity 71.4%. CONCLUSIONS Joint analysis of the biochemical profile of two blood components rather than a single biomarker is a promising strategy for early detection of CRC. Additional studies are required to validate our preliminary clinical results.
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Affiliation(s)
- Eyal Barlev
- Department of Surgery B, Rabin Medical Center, Beilinson Campus, Petach Tikva, Israel
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Udi Zelig
- Todos Medical Ltd, 1 HaMada St, 76703, Rehovot, Israel.
| | - Omri Bar
- Todos Medical Ltd, 1 HaMada St, 76703, Rehovot, Israel
| | - Cheli Segev
- Todos Medical Ltd, 1 HaMada St, 76703, Rehovot, Israel
| | - Shaul Mordechai
- Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Joseph Kapelushnik
- Pediatric Hemato-Oncology Unit, Soroka University Medical Center, Beer-Sheva, Israel
- Faculty of Medicine, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Ilana Nathan
- Department of Clinical Biochemistry, Ben-Gurion University of the Negev, Beer-Sheva, Israel
- Institute of Hematology, Soroka University Medical Center, Beer-Sheva, Israel
| | - Felix Flomen
- Todos Medical Ltd, 1 HaMada St, 76703, Rehovot, Israel
| | - Hanoch Kashtan
- Division of General Surgery, Rabin Medical Center, Beilinson Campus, Petach Tikva, Israel
| | - Ram Dickman
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
- Department of Gastroenterology, Rabin Medical Center, Beilinson Campus, Petach Tikva, Israel
| | - Osnat Madhala-Givon
- Department of Surgery B, Rabin Medical Center, Beilinson Campus, Petach Tikva, Israel
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Nir Wasserberg
- Department of Surgery B, Rabin Medical Center, Beilinson Campus, Petach Tikva, Israel
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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11
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Saeed A, Raouf GA, Nafee SS, Shaheen SA, Al-Hadeethi Y. Effects of Very Low Dose Fast Neutrons on Cell Membrane And Secondary Protein Structure in Rat Erythrocytes. PLoS One 2015; 10:e0139854. [PMID: 26436416 PMCID: PMC4593584 DOI: 10.1371/journal.pone.0139854] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Accepted: 09/17/2015] [Indexed: 11/19/2022] Open
Abstract
The effects of ionizing radiation on biological cells have been reported in several literatures. Most of them were mainly concerned with doses greater than 0.01 Gy and were also concerned with gamma rays. On the other hand, the studies on very low dose fast neutrons (VLDFN) are rare. In this study, we have investigated the effects of VLDFN on cell membrane and protein secondary structure of rat erythrocytes. Twelve female Wistar rats were irradiated with neutrons of total dose 0.009 Gy (241Am-Be, 0.2 mGy/h) and twelve others were used as control. Blood samples were taken at the 0, 4th, 8th, and 12th days postirradiation. Fourier transform infrared (FTIR) spectra of rat erythrocytes were recorded. Second derivative and curve fitting were used to analysis FTIR spectra. Hierarchical cluster analysis (HCA) was used to classify group spectra. The second derivative and curve fitting of FTIR spectra revealed that the most significant alterations in the cell membrane and protein secondary structure upon neutron irradiation were detected after 4 days postirradiation. The increase in membrane polarity, phospholipids chain length, packing, and unsaturation were noticed from the corresponding measured FTIR area ratios. This may be due to the membrane lipid peroxidation. The observed band shift in the CH2 stretching bands toward the lower frequencies may be associated with the decrease in membrane fluidity. The curve fitting of the amide I revealed an increase in the percentage area of α-helix opposing a decrease in the β-structure protein secondary structure, which may be attributed to protein denaturation. The results provide detailed insights into the VLDFN effects on erythrocytes. VLDFN can cause an oxidative stress to the irradiated erythrocytes, which appears clearly after 4 days postirradiation.
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Affiliation(s)
- A. Saeed
- Physics Department, Faculty of Science, King Abdulaziz University, Jeddah, KSA
- * E-mail:
| | - Gehan A. Raouf
- Biochemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, KSA
| | - Sherif S. Nafee
- Physics Department, Faculty of Science, King Abdulaziz University, Jeddah, KSA
| | - Salem A. Shaheen
- Physics Department, Faculty of Science, King Abdulaziz University, Jeddah, KSA
| | - Y. Al-Hadeethi
- Physics Department, Faculty of Science, King Abdulaziz University, Jeddah, KSA
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12
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Direct label-free measurement of the distribution of small molecular weight compound inside thick biological tissue using coherent Raman microspectroscopy. Sci Rep 2015; 5:13868. [PMID: 26353981 PMCID: PMC4564726 DOI: 10.1038/srep13868] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 08/07/2015] [Indexed: 02/01/2023] Open
Abstract
Distributions of small molecular weight (less than 300 Da) compounds inside biological tissue have been obscure because of the lack of appropriate methods to measure them. Although fluorescence techniques are widely used to characterise the localisation of large biomolecules, they cannot be easily applied to the cases with small molecule compounds. We used CARS spectroscopy to detect and identify a label-free small molecule compound. To facilitate detection in aqueous environment, we utilised time-resolved and phase-sensitive techniques to reduce non-resonant background generated from water. We applied this technique to detect small molecular weight compound, taurine, inside mouse cornea tissue immersed in taurine solution as an initial model experiment. We detected a Raman peak of taurine near wavenumber 1033 cm−1 inside cornea and successfully characterised its depth profile in the tissue. Our CARS spectra measurement can be a promising method to measure and visualise the distribution of small bio-related compounds in biological background without using any labeling, paving the way for new cell biological analysis in various disciplines.
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13
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Early detection of breast cancer using total biochemical analysis of peripheral blood components: a preliminary study. BMC Cancer 2015; 15:408. [PMID: 25975566 PMCID: PMC4455613 DOI: 10.1186/s12885-015-1414-7] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 05/05/2015] [Indexed: 11/23/2022] Open
Abstract
Background Most of the blood tests aiming for breast cancer screening rely on quantification of a single or few biomarkers. The aim of this study was to evaluate the feasibility of detecting breast cancer by analyzing the total biochemical composition of plasma as well as peripheral blood mononuclear cells (PBMCs) using infrared spectroscopy. Methods Blood was collected from 29 patients with confirmed breast cancer and 30 controls with benign or no breast tumors, undergoing screening for breast cancer. PBMCs and plasma were isolated and dried on a zinc selenide slide and measured under a Fourier transform infrared (FTIR) microscope to obtain their infrared absorption spectra. Differences in the spectra of PBMCs and plasma between the groups were analyzed as well as the specific influence of the relevant pathological characteristics of the cancer patients. Results Several bands in the FTIR spectra of both blood components significantly distinguished patients with and without cancer. Employing feature extraction with quadratic discriminant analysis, a sensitivity of ~90 % and a specificity of ~80 % for breast cancer detection was achieved. These results were confirmed by Monte Carlo cross-validation. Further analysis of the cancer group revealed an influence of several clinical parameters, such as the involvement of lymph nodes, on the infrared spectra, with each blood component affected by different parameters. Conclusion The present preliminary study suggests that FTIR spectroscopy of PBMCs and plasma is a potentially feasible and efficient tool for the early detection of breast neoplasms. An important application of our study is the distinction between benign lesions (considered as part of the non-cancer group) and malignant tumors thus reducing false positive results at screening. Furthermore, the correlation of specific spectral changes with clinical parameters of cancer patients indicates for possible contribution to diagnosis and prognosis.
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14
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Morato EM, Morais GR, Sato F, Medina AN, Svidzinski TIE, Baesso ML, Hernandes L. Morphological and Structural Changes in Lung Tissue Infected byParacoccidioides brasiliensis: FTIR Photoacoustic Spectroscopy and Histological Analysis. Photochem Photobiol 2013; 89:1170-5. [DOI: 10.1111/php.12110] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Accepted: 06/03/2013] [Indexed: 01/22/2023]
Affiliation(s)
- Edilaine M. Morato
- Department of Morphological Science; Universidade Estadual de Maringá; Maringá; PR; Brazil
| | - Gutierrez R. Morais
- Department of Physics; Universidade Estadual de Maringá; Maringá; PR; Brazil
| | - Francielle Sato
- Department of Physics; Universidade Estadual de Maringá; Maringá; PR; Brazil
| | - Antonio N. Medina
- Department of Physics; Universidade Estadual de Maringá; Maringá; PR; Brazil
| | | | - Mauro L. Baesso
- Department of Physics; Universidade Estadual de Maringá; Maringá; PR; Brazil
| | - Luzmarina Hernandes
- Department of Morphological Science; Universidade Estadual de Maringá; Maringá; PR; Brazil
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15
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Xiang X, Duarte PM, Lima JA, Santos VR, Gonçalves TD, Miranda TS, Liu KZ. Diabetes-associated periodontitis molecular features in infrared spectra of gingival crevicular fluid. J Periodontol 2013; 84:1792-800. [PMID: 23517510 DOI: 10.1902/jop.2013.120665] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND It has been established previously that infrared spectroscopy (IRS) can be used to identify periodontitis-specific molecular signatures in gingival crevicular fluid (GCF) and to confirm clinical diagnoses. This follow-up study is designed to assess whether this novel technique is also able to differentiate diseased from healthy sites in patients with diabetes mellitus (DM) by analyzing the molecular fingerprints embedded in the GCF. METHODS A total of 65 patients with DM with moderate-to-severe chronic periodontitis (CP) was recruited, and 15 individuals without DM (65 sites) without periodontal diseases were used as control. Clinical examination and GCF samples were taken from a total of 351 sites, including periodontitis (109), gingivitis (115), and healthy (127) sites. Corresponding absorption spectra of GCF samples were acquired and processed, and the relative contributions of key functional groups in the infrared spectra were identified and analyzed. The qualitative assessment of clinical relevance of these GCF spectra was interpreted with multivariate statistical analysis: linear discriminant analysis (LDA). RESULTS Spectral analysis revealed several molecular signatures representing vibrations in protein (amide I and II), lipid ester, and sugar moieties in the GCF of patients with DM with CP and non-DM controls. The diagnostic accuracy for distinction between healthy and CP sites in patients with DM determined by LDA of GCF spectra was 95.3% for the training set of samples and 87.5% for the validation set. Additional LDA of GCF spectra from healthy sites of non-DM controls and patients with DM revealed 100% diagnostic accuracy for the training set and 86.7% for the validation set. The regions robotically selected by LDA for the two analyses were slightly different in that first LDA identified major regions clustered with the side chain vibrations originating from protein and DNA contents, whereas the second was predominantly the glycation and protein components. CONCLUSION IRS is a feasible method to differentiate disease-specific molecular signatures in GCF in the presence of DM and to generate a complex biochemical profile of GCF to identify DM-specific spectral features.
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Affiliation(s)
- Xiaoming Xiang
- Medical Devices Portfolio, National Research Council of Canada, Winnipeg, MB
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16
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Bellisola G, Cinque G, Vezzalini M, Moratti E, Silvestri G, Redaelli S, Passerini CG, Wehbe K, Sorio C. Rapid recognition of drug-resistance/sensitivity in leukemic cells by Fourier transform infrared microspectroscopy and unsupervised hierarchical cluster analysis. Analyst 2013; 138:3934-45. [DOI: 10.1039/c2an36393c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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17
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Ramoji A, Neugebauer U, Bocklitz T, Foerster M, Kiehntopf M, Bauer M, Popp J. Toward a spectroscopic hemogram: Raman spectroscopic differentiation of the two most abundant leukocytes from peripheral blood. Anal Chem 2012; 84:5335-42. [PMID: 22721427 DOI: 10.1021/ac3007363] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first response to infection in the blood is mediated by leukocytes. As a result crucial information can be gained from a hemogram. Conventional methods such as blood smears and automated sorting procedures are not capable of recording detailed biochemical information of the different leukocytes. In this study, Raman spectroscopy has been applied to investigate the differences between the leukocyte subtypes which have been obtained from healthy donors. Raman imaging was able to visualize the same morphological features as standard staining methods without the need of any label. Unsupervised statistical methods such as principal component analysis and hierarchical cluster analysis were able to separate Raman spectra of the two most abundant leukocytes, the neutrophils and lymphocytes (with a special focus on CD4(+) T-lymphocytes). For the same cells a classification model was built to allow an automated Raman-based differentiation of the cell type in the future. The classification model could achieve an accuracy of 94% in the validation step and could predict the identity of unknown cells from a completely different donor with an accuracy of 81% when using single spectra and with an accuracy of 97% when using the majority vote from all individual spectra of the cell. This marks a promising step toward automated Raman spectroscopic blood analysis which holds the potential not only to assign the numbers of the cells but also to yield important biochemical information.
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Affiliation(s)
- Anuradha Ramoji
- Center for Sepsis Control and Care, Jena University Hospital, Jena, Germany
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18
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Zelig U, Mordechai S, Shubinsky G, Sahu RK, Huleihel M, Leibovitz E, Nathan I, Kapelushnik J. Pre-screening and follow-up of childhood acute leukemia using biochemical infrared analysis of peripheral blood mononuclear cells. Biochim Biophys Acta Gen Subj 2011; 1810:827-35. [DOI: 10.1016/j.bbagen.2011.06.010] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2011] [Revised: 06/13/2011] [Accepted: 06/15/2011] [Indexed: 01/17/2023]
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19
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Vahlsing T, Damm U, Kondepati VR, Leonhardt S, Brendel MD, Wood BR, Heise HM. Transmission infrared spectroscopy of whole blood--complications for quantitative analysis from leucocyte adhesion during continuous monitoring. JOURNAL OF BIOPHOTONICS 2010; 3:567-578. [PMID: 20449832 DOI: 10.1002/jbio.201000021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Infrared spectroscopy has been applied to analyse glucose and cellular components in whole blood with the aim of developing an online clinical diagnostic and monitoring modality. Leucocyte adsorption onto the CaF(2) windows was observed over a period of several hours under continuous blood flow using a transmission cell of 30 mum path length. This build-up of cellular material on the windows is responsible for diminishing the sample path length under the flow conditions chosen. The adsorption dynamics have been characterised and their impact on glucose monitoring is reported. For short-term monitoring (<2 hours) a standard error of prediction of 11 mg/dL with human citrated blood samples from three different subjects was achieved. Furthermore, the leucocyte build-up was also reported for porcine EDTA blood monitoring. Consequences and testing opportunities with regard to the first stages in the immune cell reaction to the exposure of body-foreign materials to anticoagulated whole blood are discussed.
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Affiliation(s)
- Thorsten Vahlsing
- Helmholtz-Institute for Biomedical Engineering, RWTH Aachen University, Aachen, Germany
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20
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Xiang XM, Liu KZ, Man A, Ghiabi E, Cholakis A, Scott DA. Periodontitis-specific molecular signatures in gingival crevicular fluid. J Periodontal Res 2010; 45:345-52. [PMID: 20337898 DOI: 10.1111/j.1600-0765.2009.01243.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND AND OBJECTIVE Periodontitis is currently diagnosed almost entirely on gross clinical manifestations that have been in situ for more than 50 years without significant improvement. The general objective of this study was, therefore, to evaluate whether mid-infrared spectroscopy can be used to identify disease-specific molecular alterations to the overall biochemical profile of tissues and body fluids. MATERIAL AND METHODS A total of 190 gingival crevicular fluid samples were obtained from periodontitis (n = 64), gingivitis (n = 61) and normal sites (n = 65). Corresponding infrared absorption spectra of gingival crevicular fluid samples were acquired and processed, and the relative contributions of key functional groups in the infrared spectra were analysed. The qualitative assessment of clinical relevance of these gingival crevicular fluid spectra was interpreted with the multivariate statistical analysis-linear discriminant analysis. RESULTS Using infrared spectroscopy, we have been able to identify four molecular signatures (representing vibrations in amide I, amide II/tyrosine rings and symmetric and asymmetric PO2- stretching vibrations of phosphodiester groups in DNA) in the gingival crevicular fluid of subjects with periodontitis or gingivitis and healthy control subjects that clearly demarcate healthy and diseased periodontal tissues. Furthermore, the diagnostic accuracy for distinction between periodontally healthy and periodontitis sites revealed by multivariate classification of gingival crevicular fluid spectra was 98.4% for a training set of samples and 93.1% for a validation set. CONCLUSION We have established that mid-infrared spectroscopy can be used to identify periodontitis-specific molecular signatures in gingival crevicular fluid and to confirm clinical diagnoses. Future longitudinal studies will assess whether mid-infrared spectroscopy represents a potential prognostic tool, recognized as key to advancement of periodontics.
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Affiliation(s)
- X M Xiang
- Institute for Biodiagnostics, National Research Council of Canada, Winnipeg, MB, Canada
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21
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Bellisola G, Della Peruta M, Vezzalini M, Moratti E, Vaccari L, Birarda G, Piccinini M, Cinque G, Sorio C. Tracking InfraRed signatures of drugs in cancer cells by Fourier Transform microspectroscopy. Analyst 2010; 135:3077-86. [DOI: 10.1039/c0an00509f] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Zelig U, Kapelushnik J, Moreh R, Mordechai S, Nathan I. Diagnosis of cell death by means of infrared spectroscopy. Biophys J 2009; 97:2107-14. [PMID: 19804743 DOI: 10.1016/j.bpj.2009.07.026] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2009] [Revised: 07/16/2009] [Accepted: 07/17/2009] [Indexed: 02/07/2023] Open
Abstract
Fourier transform infrared (FTIR) spectroscopy has been established as a fast spectroscopic method for biochemical analysis of cells and tissues. In this research we aimed to investigate FTIR's utility for identifying and characterizing different modes of cell death, using leukemic cell lines as a model system. CCRF-CEM and U937 leukemia cells were treated with arabinoside and doxorubicin apoptosis inducers, as well as with potassium cyanide, saponin, freezing-thawing, and H(2)O(2) necrosis inducers. Cell death mode was determined by various gold standard biochemical methods in parallel with FTIR-microscope measurements. Both cell death modes exhibit large spectral changes in lipid absorbance during apoptosis and necrosis; however, these changes are similar and thus cannot be used to distinguish apoptosis from necrosis. In contrast to the above confounding factor, our results reveal that apoptosis and necrosis can still be distinguished by the degree of DNA opaqueness to infrared light. Moreover, these two cell death modes also can be differentiated by their infrared absorbance, which relates to the secondary structure of total cellular protein. In light of these findings, we conclude that, because of its capacity to monitor multiple biomolecular parameters, FTIR spectroscopy enables unambiguous and easy analysis of cell death modes and may be useful for biochemical and medical applications.
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Affiliation(s)
- Udi Zelig
- Department of Biomedical Engineering, Ben Gurion University, Beer Sheva, Israel
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23
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Zwielly A, Gopas J, Brkic G, Mordechai S. Discrimination between drug-resistant and non-resistant human melanoma cell lines by FTIR spectroscopy. Analyst 2008; 134:294-300. [PMID: 19173052 DOI: 10.1039/b805223a] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
We investigated the ability of FTIR-microscopy to define spectral changes between drug-sensitive and drug-resistant human melanoma cells. As a model system, a resistant melanoma cell line (GAC) was selected with cisplatin from parental (GA) cells. Using Fourier transform infrared spectroscopy (FTIR) we investigated the ability to differentiate between the resistant variant derived from the sensitive parental cell line, in the absence of cisplatin. We determined and validated spectral parameters (biomarkers) that differentiated between the two cell lines. By applying the principal component analysis (PCA) model, we reduced the original data size to six principal components. We detected a significant and consistent increase in the cell's DNA/RNA ratio as well as an increase in the lipid/protein ratio in the resistant cells. These results strongly support the potential of developing FTIR microspectroscopy as a simple, reagent-free method for the identification of drug-resistant cells. Rapid detection of tumors resistant to a particular drug, should contribute to the ability of the physician to choose an effective treatment protocol.
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Affiliation(s)
- A Zwielly
- Department of Physics and the Cancer Research Center, Ben-Gurion University (BGU), Beer-Sheva, 84105, Israel
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24
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Wang L, Mizaikoff B. Application of multivariate data-analysis techniques to biomedical diagnostics based on mid-infrared spectroscopy. Anal Bioanal Chem 2008; 391:1641-54. [PMID: 18379763 DOI: 10.1007/s00216-008-1989-9] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2008] [Revised: 02/14/2008] [Accepted: 02/18/2008] [Indexed: 10/22/2022]
Abstract
The objective of this contribution is to review the application of advanced multivariate data-analysis techniques in the field of mid-infrared (MIR) spectroscopic biomedical diagnosis. MIR spectroscopy is a powerful chemical analysis tool for detecting biomedically relevant constituents such as DNA/RNA, proteins, carbohydrates, lipids, etc., and even diseases or disease progression that may induce changes in the chemical composition or structure of biological systems including cells, tissues, and bio-fluids. However, MIR spectra of multiple constituents are usually characterized by strongly overlapping spectral features reflecting the complexity of biological samples. Consequently, MIR spectra of biological samples are frequently difficult to interpret by simple data-analysis techniques. Hence, with increasing complexity of the sample matrix more sophisticated mathematical and statistical data analysis routines are required for deconvoluting spectroscopic data and for providing useful results from information-rich spectroscopic signals. A large body of work relates to the combination of multivariate data-analysis techniques with MIR spectroscopy, and has been applied by a variety of research groups to biomedically relevant areas such as cancer detection and analysis, artery diseases, biomarkers, and other pathologies. The reported results indeed reveal a promising perspective for more widespread application of multivariate data analysis in assisting MIR spectroscopy as a screening or diagnostic tool in biomedical research and clinical studies. While the authors do not mean to ignore any relevant contributions to biomedical analysis across the entire electromagnetic spectrum, they confine the discussion in this contribution to the mid-infrared spectral range as a potentially very useful, yet underutilized frequency region. Selected representative examples without claiming completeness will demonstrate a range of biomedical diagnostic applications with particular emphasis on the advantageous interaction between multivariate data analysis and MIR spectroscopy.
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Affiliation(s)
- Liqun Wang
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332-0400, USA
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