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Gauthier A, Tlili L, Battu S, Le Moan C, Ploy MC, Lalloue F, Bégaud G, Barraud O. Sedimentation field-flow fractionation for rapid phenotypic antimicrobial susceptibility testing: a pilot study. J Antimicrob Chemother 2024:dkae132. [PMID: 38708644 DOI: 10.1093/jac/dkae132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 04/16/2024] [Indexed: 05/07/2024] Open
Abstract
BACKGROUND The increase in antibiotic resistance is a major public health issue. The development of rapid antimicrobial susceptibility testing (AST) methods is becoming a priority to ensure early and appropriate antibiotic therapy. OBJECTIVES To evaluate sedimentation field-flow fractionation (SdFFF) as a method for performing AST in less than 3 h. METHODS SdFFF is based on the detection of early biophysical changes in bacteria, using a chromatographic-type technology. One hundred clinical Escherichia coli strains were studied. A calibrated bacterial suspension was incubated for 2 h at 37°C in the absence (untreated) or presence (treated) of five antibiotics used at EUCAST breakpoint concentrations. Bacterial suspensions were then injected into the SdFFF machine. For each E. coli isolate, retention times and elution profiles of antibiotic-treated bacteria were compared with retention times and elution profiles of untreated bacteria. Algorithms comparing retention times and elution profiles were used to determine if the strain was susceptible or resistant. Performance evaluation was done according to CLSI and the ISO standard 20776-2:2021 with broth microdilution used as the reference method. RESULTS AST results from SdFFF were obtained in less than 3 h. SdFFF showed high categorical agreement (99.8%), sensitivity (99.5%) and specificity (100.0%) with broth microdilution. Results for each antimicrobial were also in agreement with the ISO 20776-2 recommendations, with sensitivity and specificity of ≥95.0%. CONCLUSIONS This study showed that SdFFF can be used as a rapid, accurate and reliable phenotypic AST method with a turnaround time of less than 3 h.
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Affiliation(s)
- Audrey Gauthier
- Inserm, CHU Limoges, RESINFIT, UMR 1092, University of Limoges, 87000 Limoges, France
- Inserm, CHU Limoges, CAPTuR, UMR 1308, University of Limoges, 87000 Limoges, France
- DAMOCLES Diagnostics, 87000 Limoges, France
| | - Linda Tlili
- Inserm, CHU Limoges, RESINFIT, UMR 1092, University of Limoges, 87000 Limoges, France
| | - Serge Battu
- Inserm, CHU Limoges, CAPTuR, UMR 1308, University of Limoges, 87000 Limoges, France
- DAMOCLES Diagnostics, 87000 Limoges, France
| | - Coline Le Moan
- Inserm, CHU Limoges, CAPTuR, UMR 1308, University of Limoges, 87000 Limoges, France
| | - Marie-Cécile Ploy
- Inserm, CHU Limoges, RESINFIT, UMR 1092, University of Limoges, 87000 Limoges, France
| | - Fabrice Lalloue
- Inserm, CHU Limoges, CAPTuR, UMR 1308, University of Limoges, 87000 Limoges, France
| | - Gaëlle Bégaud
- Inserm, CHU Limoges, CAPTuR, UMR 1308, University of Limoges, 87000 Limoges, France
- DAMOCLES Diagnostics, 87000 Limoges, France
| | - Olivier Barraud
- Inserm, CHU Limoges, RESINFIT, UMR 1092, University of Limoges, 87000 Limoges, France
- DAMOCLES Diagnostics, 87000 Limoges, France
- CHU Limoges, Inserm, CIC1435, 87000 Limoges, France
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Auger C, Brunel A, Darbas T, Akil H, Perraud A, Bégaud G, Bessette B, Christou N, Verdier M. Extracellular Vesicle Measurements with Nanoparticle Tracking Analysis: A Different Appreciation of Up and Down Secretion. Int J Mol Sci 2022; 23:ijms23042310. [PMID: 35216426 PMCID: PMC8875573 DOI: 10.3390/ijms23042310] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 02/11/2022] [Accepted: 02/15/2022] [Indexed: 12/17/2022] Open
Abstract
As is the case with most eucaryotic cells, cancer cells are able to secrete extracellular vesicles (EVs) as a communication means towards their environment and surrounding cells. EVs are represented by microvesicles and smaller vesicles called exosomes, which are known for their involvement in cancer aggressiveness. The release of such EVs requires the intervention of trafficking-associated proteins, mostly represented by the RAB-GTPases family. In particular, RAB27A is known for its role in addressing EVs-to-be secreted towards the the plasma membrane. In this study, shRNAs targeting RAB27A were used in colorectal (CRC) and glioblastoma (GB) cell lines in order to alter EVs secretion. To study and monitor EVs secretion in cell lines’ supernatants, nanoparticle tracking analysis (NTA) was used through the NanoSight NS300 device. Since it appeared that NanoSight failed to detect the decrease in the EVs secretion, we performed another approach to drop EVs secretion (RAB27A-siRNA, indomethacin, Nexihnib20). Similar results were obtained i.e., no variation in EVs concentration. Conversely, NTA allowed us to monitor EVs up-secretion following rotenone treatment or hypoxia conditions. Therefore, our data seemed to point out the insufficiency of using only this technique for the assessment of EVs secretion decrease.
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Affiliation(s)
- Clément Auger
- UMR Inserm 1308, CAPTuR, Faculty of Medicine, University of Limoges, 2 rue du Dr. Marcland, 87025 Limoges, France; (C.A.); (A.B.); (T.D.); (A.P.); (G.B.); (B.B.); (N.C.)
| | - Aude Brunel
- UMR Inserm 1308, CAPTuR, Faculty of Medicine, University of Limoges, 2 rue du Dr. Marcland, 87025 Limoges, France; (C.A.); (A.B.); (T.D.); (A.P.); (G.B.); (B.B.); (N.C.)
| | - Tiffany Darbas
- UMR Inserm 1308, CAPTuR, Faculty of Medicine, University of Limoges, 2 rue du Dr. Marcland, 87025 Limoges, France; (C.A.); (A.B.); (T.D.); (A.P.); (G.B.); (B.B.); (N.C.)
- Service d’Oncologie, CHU of Limoges, 2 rue Martin Luther King, 87025 Limoges, France
| | - Hussein Akil
- UMR CNRS 7276/INSERM U1262, Faculté de Médecine, Université de Limoges, 2 rue du Martin Luther King, 87025 Limoges, France;
| | - Aurélie Perraud
- UMR Inserm 1308, CAPTuR, Faculty of Medicine, University of Limoges, 2 rue du Dr. Marcland, 87025 Limoges, France; (C.A.); (A.B.); (T.D.); (A.P.); (G.B.); (B.B.); (N.C.)
- Endocrine, General and Digestive Surgery Department, CHU of Limoges, 2 rue Martin Luther King, 87042 Limoges, France
| | - Gaëlle Bégaud
- UMR Inserm 1308, CAPTuR, Faculty of Medicine, University of Limoges, 2 rue du Dr. Marcland, 87025 Limoges, France; (C.A.); (A.B.); (T.D.); (A.P.); (G.B.); (B.B.); (N.C.)
- Laboratoire de Chimie Analytique, Faculté de Medecine & Pharmacie, 87025 Limoges, France
| | - Barbara Bessette
- UMR Inserm 1308, CAPTuR, Faculty of Medicine, University of Limoges, 2 rue du Dr. Marcland, 87025 Limoges, France; (C.A.); (A.B.); (T.D.); (A.P.); (G.B.); (B.B.); (N.C.)
| | - Niki Christou
- UMR Inserm 1308, CAPTuR, Faculty of Medicine, University of Limoges, 2 rue du Dr. Marcland, 87025 Limoges, France; (C.A.); (A.B.); (T.D.); (A.P.); (G.B.); (B.B.); (N.C.)
- Endocrine, General and Digestive Surgery Department, CHU of Limoges, 2 rue Martin Luther King, 87042 Limoges, France
| | - Mireille Verdier
- UMR Inserm 1308, CAPTuR, Faculty of Medicine, University of Limoges, 2 rue du Dr. Marcland, 87025 Limoges, France; (C.A.); (A.B.); (T.D.); (A.P.); (G.B.); (B.B.); (N.C.)
- Correspondence:
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Brunel A, Bégaud G, Auger C, Durand S, Battu S, Bessette B, Verdier M. Autophagy and Extracellular Vesicles, Connected to rabGTPase Family, Support Aggressiveness in Cancer Stem Cells. Cells 2021; 10:1330. [PMID: 34072080 PMCID: PMC8227744 DOI: 10.3390/cells10061330] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 05/20/2021] [Accepted: 05/24/2021] [Indexed: 12/22/2022] Open
Abstract
Even though cancers have been widely studied and real advances in therapeutic care have been made in the last few decades, relapses are still frequently observed, often due to therapeutic resistance. Cancer Stem Cells (CSCs) are, in part, responsible for this resistance. They are able to survive harsh conditions such as hypoxia or nutrient deprivation. Autophagy and Extracellular Vesicles (EVs) secretion are cellular processes that help CSC survival. Autophagy is a recycling process and EVs secretion is essential for cell-to-cell communication. Their roles in stemness maintenance have been well described. A common pathway involved in these processes is vesicular trafficking, and subsequently, regulation by Rab GTPases. In this review, we analyze the role played by Rab GTPases in stemness status, either directly or through their regulation of autophagy and EVs secretion.
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Lacroix A, Deluche E, Zhang LY, Dalmay C, Mélin C, Leroy J, Babay M, Morand Du Puch C, Giraud S, Bessette B, Bégaud G, Saada S, Lautrette C, Pothier A, Battu S, Lalloué F. A New Label-Free Approach to Glioblastoma Cancer Stem Cell Sorting and Detection. Anal Chem 2019; 91:8948-8957. [PMID: 31179686 DOI: 10.1021/acs.analchem.9b00913] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Cancer stem cells (CSCs) play critical roles in cancer, making them important targets for new diagnostic and therapeutic approaches. Since CSCs are heterogeneous and not abundant in tumors, and few specific markers for these cells currently exist, new methods to isolate and characterize them are required. To address this issue, we developed a new label-free methodology to isolate, enrich, and identify CSCs from an heterogeneous tumor cell subpopulation using a cell sorting method (sedimentation field flow fractionation, SdFFF) and a biosensor as a detector. Enrichment was optimized using an original protocol and U87-MG glioblastoma cells cultured in a normal (N) or defined (D) medium (± fetal bovine serum, FBS) under normoxic (N, pO2 = 20%) or hypoxic (H, pO2 < 2%) conditions to obtain four cell populations: NN, NH, DN, and DH. After elution of CSCs via SdFFF using the hyperlayer mode (inertial elution mode for micrometer-sized species), we isolated eight subpopulations with distinct CSC contents based on phenotypical and functional properties, ranging from NN F1 with a lower CSC content to DH F3 with a higher CSC content. Reflecting biological differences, the intrinsic intracellular dielectric permittivity increased from NN to DH conditions. The largest difference in electromagnetic signature was observed between NN F1 and DH F3, in which the CSC content was lowest and highest, respectively. The results demonstrate that microwave dielectric spectroscopy can be used to reliably and efficiently distinguish stem cell characteristics. This new instrumental and methodological approach is an important innovation that allows both enrichment and detection of CSCs, opening the door to novel diagnostic and therapeutic approaches.
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Affiliation(s)
- Aurélie Lacroix
- EA3842- CAPTuR, GEIST, Faculté de Médecine , Université de Limoges , 2 rue du Dr Marcland , 87025 Limoges Cedex , France
| | - Elise Deluche
- EA3842- CAPTuR, GEIST, Faculté de Médecine , Université de Limoges , 2 rue du Dr Marcland , 87025 Limoges Cedex , France.,Department of Medical Oncology , Limoges University Hospital , 2 rue Martin Luther King , 87042 Limoges , France
| | - Ling Yan Zhang
- XLIM-UMR CNRS 7252 , Université de Limoges , 123, avenue Albert Thomas , 87060 Limoges Cedex , France
| | - Claire Dalmay
- XLIM-UMR CNRS 7252 , Université de Limoges , 123, avenue Albert Thomas , 87060 Limoges Cedex , France
| | - Carole Mélin
- EA3842- CAPTuR, GEIST, Faculté de Médecine , Université de Limoges , 2 rue du Dr Marcland , 87025 Limoges Cedex , France
| | - Jonathan Leroy
- XLIM-UMR CNRS 7252 , Université de Limoges , 123, avenue Albert Thomas , 87060 Limoges Cedex , France
| | - Meissa Babay
- XLIM-UMR CNRS 7252 , Université de Limoges , 123, avenue Albert Thomas , 87060 Limoges Cedex , France
| | | | | | - Barbara Bessette
- EA3842- CAPTuR, GEIST, Faculté de Médecine , Université de Limoges , 2 rue du Dr Marcland , 87025 Limoges Cedex , France
| | - Gaëlle Bégaud
- EA3842- CAPTuR, GEIST, Faculté de Médecine , Université de Limoges , 2 rue du Dr Marcland , 87025 Limoges Cedex , France
| | - Sofiane Saada
- EA3842- CAPTuR, GEIST, Faculté de Médecine , Université de Limoges , 2 rue du Dr Marcland , 87025 Limoges Cedex , France
| | | | - Arnaud Pothier
- XLIM-UMR CNRS 7252 , Université de Limoges , 123, avenue Albert Thomas , 87060 Limoges Cedex , France
| | - Serge Battu
- EA3842- CAPTuR, GEIST, Faculté de Médecine , Université de Limoges , 2 rue du Dr Marcland , 87025 Limoges Cedex , France
| | - Fabrice Lalloué
- EA3842- CAPTuR, GEIST, Faculté de Médecine , Université de Limoges , 2 rue du Dr Marcland , 87025 Limoges Cedex , France
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Bessette B, Durand K, Giraud S, Bégaud G, Mathonnet M, Lalloué F. Decrease in Fas-induced apoptosis by the γ-secretase inhibitor is dependent on p75(NTR) in a glioblastoma cell line. Exp Ther Med 2012; 3:873-877. [PMID: 22969985 DOI: 10.3892/etm.2012.480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Accepted: 01/17/2012] [Indexed: 11/06/2022] Open
Abstract
p75(NTR), a member of the tumor necrosis factor superfamily, plays a key role in numerous physiological processes, including cell survival or apoptosis. Yet, the associated signaling pathways remain poorly understood. Similar to Notch, γ-secretase cleavage is implicated in the p75(NTR) signaling pathway leading to nuclear translocation of the intracellular domain and cell death. Fas receptor activation was found to promote cell death apoptosis in several cell lines. The goal of this study was to determine the respective role of p75(NTR) and Notch in the resistance to Fas-induced apoptosis in the U-87 MG glioblastoma cell line. Using the γ-secretase inhibitor, we investigated the modulation of Fas-induced apoptosis dependent on p75(NTR)-Fas receptor interaction. Whereas the U-87 MG cells expressed the Fas receptor at the cell membrane, apoptosis induced by Fas activation was decreased by the γ-secretase inhibitor. These data suggest that γ-secretase is implicated in p75(NTR) and Fas interaction leading to cell death signaling.
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Affiliation(s)
- Barbara Bessette
- University of Limoges, EA3842, 'Cellular Homeostasis and Pathology', Faculty of Medicine, 87025 Limoges Cedex
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