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FT-IR Spectral Signature of Sensitive and Multidrug-Resistant Osteosarcoma Cell-Derived Extracellular Nanovesicles. Cells 2022; 11:cells11050778. [PMID: 35269400 PMCID: PMC8909163 DOI: 10.3390/cells11050778] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 02/16/2022] [Accepted: 02/21/2022] [Indexed: 02/07/2023] Open
Abstract
Osteosarcoma (OS) is the most common primary bone cancer in children and adolescents. Despite aggressive treatment regimens, the outcome is unsatisfactory, and multidrug resistance (MDR) is a pivotal process in OS treatment failure. OS-derived extracellular vesicles (EVs) promote drug resistance to chemotherapy and target therapy through different mechanisms. The aim of this study was to identify subpopulations of osteosarcoma-EVs by Fourier transform infrared spectroscopy (FT-IR) to define a specific spectral signature for sensitive and multidrug-resistant OS-derived EVs. EVs were isolated from sensitive and MDR OS cells as well as from mesenchymal stem cells by differential centrifugation and ultracentrifugation. EVs size, morphology and protein expression were characterized. FT-IR/ATR of EVs spectra were acquired in the region of 400–4000 cm−1 (resolution 4 cm−1, 128 scans). The FT-IR spectra obtained were consistently different in the EVs compared to cells from which they originate. A specific spectral signature, characterized by a shift and a new band (1601 cm−1), permitted to clearly distinguish EVs isolated by sensitive and multidrug-resistant OS cells. Our data suggest that FT-IR spectroscopy allows to characterize and define a specific spectral signature for sensitive and MDR OS-derived EVs.
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Gao Y, Huo X, Dong L, Sun X, Sai H, Wei G, Xu Y, Zhang Y, Wu J. Fourier transform infrared microspectroscopy monitoring of 5-fluorouracil-induced apoptosis in SW620 colon cancer cells. Mol Med Rep 2014; 11:2585-91. [PMID: 25503826 PMCID: PMC4337715 DOI: 10.3892/mmr.2014.3088] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2014] [Accepted: 11/07/2014] [Indexed: 11/23/2022] Open
Abstract
Colon cancer is associated with a high incidence and a poor prognosis. The aim of the present study was to determine whether Fourier transform infrared (FTIR) microspectroscopy can be used to monitor the chemotherapy drug-induced apoptosis of SW620 colon cancer cells. The 50% inhibitory concentration (IC50) of 5-fluorouracil (5-FU), the main chemotherapeutic agent used for the treatment of colorectal cancer, was determined as the inhibition of growth of the SW620 cells using an MTT assay. Cell starvation and 5-FU treatment synergized to arrest the cells in the G1 and S phases of the cell cycle. FTIR combined with fluorescence activated cell sorting (FACS) analysis were used to analyze the SW620 cells following treatment with 5-FU for 12, 24 and 48 h. The apoptotic cells had several spectral characteristics. The relative peak intensity ratio (I1740/I1460) was significantly increased (P<0.05), the I1740/I1460 ratio, associated with a band of amino acid residues at 1,410 cm−1 was significantly increased at the early and late phases of cell death (P<0.05), the peaks at 1,240 cm−1 increased in wave number, a band at 1,040 cm−1, associated with polysaccharides, appeared at 24 and 48 h and then moved to a higher wave number and the I1040/I1460 ratio increased at the late stage of apoptosis. These results demonstrated that FTIR can be used as a label-free technique to monitor cancer cell apoptosis and to understand the spectral fingerprints of apoptotic cells. This suggested that FTIR spectral features have potential as a powerful tool to monitor cancer cell apoptosis.
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Affiliation(s)
- Yanfeng Gao
- Department of Anesthesiology, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Xiongwei Huo
- Department of General Surgery, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Liu Dong
- Department of General Surgery, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Xuejun Sun
- Department of General Surgery, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - He Sai
- Department of General Surgery, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Guangbing Wei
- Department of General Surgery, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Yizhuang Xu
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P.R. China
| | - Yuanfu Zhang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P.R. China
| | - Jinguang Wu
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P.R. China
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Long X, Nasse MJ, Ma Y, Qi L. From synthetic to biogenic Mg-containing calcites: a comparative study using FTIR microspectroscopy. Phys Chem Chem Phys 2012; 14:2255-63. [DOI: 10.1039/c2cp22453d] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Batard E, Jamme F, Villette S, Jacqueline C, de la Cochetière MF, Caillon J, Réfrégiers M. Diffusion of ofloxacin in the endocarditis vegetation assessed with synchrotron radiation UV fluorescence microspectroscopy. PLoS One 2011; 6:e19440. [PMID: 21559378 PMCID: PMC3084860 DOI: 10.1371/journal.pone.0019440] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2011] [Accepted: 03/28/2011] [Indexed: 11/18/2022] Open
Abstract
The diffusion of antibiotics in endocarditis vegetation bacterial masses has not
been described, although it may influence the efficacy of antibiotic therapy in
endocarditis. The objective of this work was to assess the diffusion of
ofloxacin in experimental endocarditis vegetation bacterial masses using
synchrotron-radiation UV fluorescence microspectroscopy. Streptococcal
endocarditis was induced in 5 rabbits. Three animals received an unique IV
injection of 150 mg/kg ofloxacin, and 2 control rabbits were left untreated. Two
fluorescence microscopes were coupled to a synchrotron beam for excitation at
275 nm. A spectral microscope collected fluorescence spectra between 285 and 550
nm. A second, full field microscope was used with bandpass filters at
510–560 nm. Spectra of ofloxacin-treated vegetations presented higher
fluorescence between 390 and 540 nm than control. Full field imaging showed that
ofloxacin increased fluorescence between 510 and 560 nm. Ofloxacin diffused into
vegetation bacterial masses, although it accumulated in their immediate
neighborhood. Fluorescence images additionally suggested an ofloxacin
concentration gradient between the vegetation peripheral and central areas. In
conclusion, ofloxacin diffuses into vegetation bacterial masses, but it
accumulates in their immediate neighborhood. Synchrotron radiation UV
fluorescence microscopy is a new tool for assessment of antibiotic diffusion in
the endocarditis vegetation bacterial masses.
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Affiliation(s)
- Eric Batard
- Université de Nantes, EA3826 Thérapeutiques cliniques et expérimentales des infections, Nantes, France.
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Batard E, Jamme F, Montassier E, Bertrand D, Caillon J, Potel G, Dumas P. Synchrotron radiation infrared microspectroscopy to assess the activity of vancomycin against endocarditis vegetation bacteria. J Microbiol Methods 2011; 85:235-8. [PMID: 21447359 DOI: 10.1016/j.mimet.2011.03.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2011] [Revised: 03/16/2011] [Accepted: 03/21/2011] [Indexed: 11/26/2022]
Abstract
Infrared microspectroscopy was used to show that vancomycin alters infrared spectra of endocarditis vegetation bacteria, and that vancomycin effects on bacterial biochemical contents are unevenly distributed between peripheral and central areas of bacterial masses. Infrared microspectroscopy is useful to study the activity of antibacterial agents against bacteria in tissues.
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Affiliation(s)
- Eric Batard
- Université de Nantes, EA3826 Thérapeutiques cliniques et expérimentales des infections, Nantes, France.
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