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Rifflet A, Filali S, Chenau J, Simon S, Fenaille F, Junot C, Carniel E, Becher F. Quantification of low abundance Yersinia pestis markers in dried blood spots by immuno-capture and quantitative high-resolution targeted mass spectrometry. Eur J Mass Spectrom (Chichester) 2019; 25:268-277. [PMID: 31096787 DOI: 10.1177/1469066718795978] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Plague, caused by the bacterium Yersinia pestis, is still present in several countries worldwide. Besides, Y. pestis has been designated as Tier 1 agent, the highest rank of bioterrorism agents. In this context, reliable diagnostic methods are of great importance. Here, we have developed an original workflow based upon dried blood spot for simplified sampling of clinical specimens, and specific immuno-mass spectrometry monitoring of Y. pestis biomarkers. Targeted proteins were selectively enriched from dried blood spot extracts by multiplex immunocapture using antibody-coated magnetic beads. After accelerated on-beads digestion, proteotypic peptides were monitored by multiplex LC-MS/MS through the parallel reaction monitoring mode. The DBS-IC-MS assay was designed to quantify both F1 and LcrV antigens, although 10-fold lower sensitivity was observed with LcrV. The assay was successfully validated for F1 with a lower limit of quantification at 5 ng·mL-1 in spiked blood, corresponding to only 0.1 ng on spots. In vivo quantification of F1 in blood and organ samples was demonstrated in the mouse model of pneumonic plague. The new assay could help to simplify the laboratory confirmation of positive point of care F1 dipstick.
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Affiliation(s)
- Aline Rifflet
- 1 Service de Pharmacologie et d'Immunoanalyse (SPI), CEA, INRA, Université Paris-Saclay, Gif sur Yvette, France
| | - Sofia Filali
- 2 Yersinia Research Unit, Institut Pasteur, Paris, France
| | - Jérôme Chenau
- 1 Service de Pharmacologie et d'Immunoanalyse (SPI), CEA, INRA, Université Paris-Saclay, Gif sur Yvette, France
| | - Stéphanie Simon
- 1 Service de Pharmacologie et d'Immunoanalyse (SPI), CEA, INRA, Université Paris-Saclay, Gif sur Yvette, France
| | - François Fenaille
- 1 Service de Pharmacologie et d'Immunoanalyse (SPI), CEA, INRA, Université Paris-Saclay, Gif sur Yvette, France
| | - Christophe Junot
- 1 Service de Pharmacologie et d'Immunoanalyse (SPI), CEA, INRA, Université Paris-Saclay, Gif sur Yvette, France
| | | | - François Becher
- 1 Service de Pharmacologie et d'Immunoanalyse (SPI), CEA, INRA, Université Paris-Saclay, Gif sur Yvette, France
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Chenau J, Fenaille F, Simon S, Filali S, Volland H, Junot C, Carniel E, Becher F. Detection of Yersinia pestis in Complex Matrices by Intact Cell Immunocapture and Targeted Mass Spectrometry. Methods Mol Biol 2017; 1600:69-83. [PMID: 28478558 DOI: 10.1007/978-1-4939-6958-6_7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We describe an immunoaffinity-liquid chromatography-tandem mass spectrometry (immuno-LC-MS/MS) protocol for the direct (i.e., without prior culture), sensitive and specific detection of Yersinia pestis in complex matrices. Immunoaffinity enables isolation and concentration of intact bacterial cells from food and environmental samples. After protein extraction and digestion, suitable proteotypic peptides corresponding to three Y. pestis-specific protein markers (murine toxine, plasminogen activator and pesticin) are monitored by targeted LC-MS/MS using the selected reaction monitoring (SRM) mode. This immuno-LC-MS/MS assay has a limit of detection of 2 × 104 CFU/mL in milk or tap water, and 4.5 × 105 CFU in 10 mg of soil.
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Affiliation(s)
- Jérôme Chenau
- CEA, iBiTec-S, Service de Pharmacologie et d'Immunoanalyse, Bât. 136, 91191, Gif-sur-Yvette, France
| | - François Fenaille
- CEA, iBiTec-S, Service de Pharmacologie et d'Immunoanalyse, Bât. 136, 91191, Gif-sur-Yvette, France
| | - Stéphanie Simon
- CEA, iBiTec-S, Service de Pharmacologie et d'Immunoanalyse, Bât. 136, 91191, Gif-sur-Yvette, France
| | - Sofia Filali
- Institut Pasteur, Unité de Recherche Yersinia, Paris, France
| | - Hervé Volland
- CEA, iBiTec-S, Service de Pharmacologie et d'Immunoanalyse, Bât. 136, 91191, Gif-sur-Yvette, France
| | - Christophe Junot
- CEA, iBiTec-S, Service de Pharmacologie et d'Immunoanalyse, Bât. 136, 91191, Gif-sur-Yvette, France
| | | | - François Becher
- CEA, iBiTec-S, Service de Pharmacologie et d'Immunoanalyse, Bât. 136, 91191, Gif-sur-Yvette, France.
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Guinet F, Avé P, Filali S, Huon C, Savin C, Huerre M, Fiette L, Carniel E. Dissociation of Tissue Destruction and Bacterial Expansion during Bubonic Plague. PLoS Pathog 2015; 11:e1005222. [PMID: 26484539 PMCID: PMC4615631 DOI: 10.1371/journal.ppat.1005222] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Accepted: 09/22/2015] [Indexed: 01/14/2023] Open
Abstract
Activation and/or recruitment of the host plasmin, a fibrinolytic enzyme also active on extracellular matrix components, is a common invasive strategy of bacterial pathogens. Yersinia pestis, the bubonic plague agent, expresses the multifunctional surface protease Pla, which activates plasmin and inactivates fibrinolysis inhibitors. Pla is encoded by the pPla plasmid. Following intradermal inoculation, Y. pestis has the capacity to multiply in and cause destruction of the lymph node (LN) draining the entry site. The closely related, pPla-negative, Y. pseudotuberculosis species lacks this capacity. We hypothesized that tissue damage and bacterial multiplication occurring in the LN during bubonic plague were linked and both driven by pPla. Using a set of pPla-positive and pPla-negative Y. pestis and Y. pseudotuberculosis strains in a mouse model of intradermal injection, we found that pPla is not required for bacterial translocation to the LN. We also observed that a pPla-cured Y. pestis caused the same extensive histological lesions as the wild type strain. Furthermore, the Y. pseudotuberculosis histological pattern, characterized by infectious foci limited by inflammatory cell infiltrates with normal tissue density and follicular organization, was unchanged after introduction of pPla. However, the presence of pPla enabled Y. pseudotuberculosis to increase its bacterial load up to that of Y. pestis. Similarly, lack of pPla strongly reduced Y. pestis titers in LNs of infected mice. This pPla-mediated enhancing effect on bacterial load was directly dependent on the proteolytic activity of Pla. Immunohistochemistry of Pla-negative Y. pestis-infected LNs revealed extensive bacterial lysis, unlike the numerous, apparently intact, microorganisms seen in wild type Y. pestis-infected preparations. Therefore, our study demonstrates that tissue destruction and bacterial survival/multiplication are dissociated in the bubo and that the primary action of Pla is to protect bacteria from destruction rather than to alter the tissue environment to favor Y. pestis propagation in the host. The hallmark of bubonic plague, a disease that ravaged Medieval Europe and is still prevalent in several countries, is the bubo, a highly inflammatory and painful lymph node, which is characterized by high concentrations of bacteria within a severely damaged organ. Yersinia pestis, the causative agent, expresses a surface protease, Pla, critical to the development of bubonic plague. This multitarget protease has the potential to activate the fibrinolytic pathway and to promote destruction of extracellular protein networks within tissues. Hence, it was expected that Pla was responsible for the tissue destructions of the bubo, and consequently, for bacterial propagation and virulence. However, we found, using various engineered Yersinia strains in a mouse model of bubonic plague, that Pla proteolytic activity was dispensable for lymph node alteration, but was required to achieve high bacterial loads in the organ. Further analysis showed that Pla is essential for preventing the bacteria from being destroyed in the host. Therefore, the role of Pla as a virulence factor is to protect Y. pestis survival and integrity in the host, rather than to assist its spread through tissue destruction.
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Affiliation(s)
- Françoise Guinet
- Unité de Recherche Yersinia, Institut Pasteur, Paris, France
- * E-mail: (FG); (EC)
| | - Patrick Avé
- Unité d’Histopathologie Humaine et Modèles Animaux, Institut Pasteur, Paris, France
| | - Sofia Filali
- Unité de Recherche Yersinia, Institut Pasteur, Paris, France
| | - Christèle Huon
- Unité de Recherche Yersinia, Institut Pasteur, Paris, France
| | - Cyril Savin
- Unité de Recherche Yersinia, Institut Pasteur, Paris, France
| | - Michel Huerre
- Unité de Recherche et d’Expertise d’Histotechnologie et Pathologie, Institut Pasteur, Paris, France
| | - Laurence Fiette
- Unité d’Histopathologie Humaine et Modèles Animaux, Institut Pasteur, Paris, France
| | - Elisabeth Carniel
- Unité de Recherche Yersinia, Institut Pasteur, Paris, France
- * E-mail: (FG); (EC)
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Tall ML, Diouf E, Filali S, Sauvinet V, Laleye D, Dhelens C, Salmon D, Gabert L, Nugue G, Sandre-Balester C, Berger F, Pirot F, Pivot C. [Injectable hospital preparation of valine labeled with the carbon 13 and nitrogen 15 (5 mg/mL) for a clinical trial on the brain tumor metabolism: Pharmaceutical control of active pharmaceutical ingredient and stability study of the finished product]. Ann Pharm Fr 2015; 73:361-77. [PMID: 25747724 DOI: 10.1016/j.pharma.2015.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 01/28/2015] [Accepted: 02/02/2015] [Indexed: 10/23/2022]
Abstract
INTRODUCTION The L-Valine labeled (L-[U-(13)C,(15)N] Val) is a stable isotopic tracer administered by parenteral route within the framework of a new clinical research program concerning the brain tumor metabolism. To meet regulatory requirements and have ready to use solution with an expiration date, a pharmaceutical control of active pharmaceutical ingredient followed by stability study of hospital preparation were realised. MATERIALS AND METHODS After the pharmaceutical control of the L-[U-(13)C,(15)N] Val, the hospital preparation was prepared according to the good manufacturing preparation. Prepared bottles were stored at 5°C±3°C and 25°C±2°C for six months. The stability of the preparation was determined by physico-chemical controls (pH, osmolality, sub-visible particles, L-[U-(13)C,(15)N] Val concentration, sodium concentration, isotopic enrichment) and microbiological (bacterial endotoxin and sterility). RESULTS Concentrations of L-[U-(13)C, (15)N] Val and sodium does not significantly decrease during the stability study. In parallel, no change in pH and osmolality were highlighted. Isotopic enrichment higher than 99.9% reflected the stability of labeling of L-valine molecule. The sub-visible particles, the bacterial endotoxin and sterility were in accordance with the European Pharmacopoeia attesting limpidity, apyrogenicity and sterility of this injectable preparation. DISCUSSION AND CONCLUSION The stability of this hospital preparation of L-[U-(13)C, (15)N] Val has been demonstrated for six months at 5°C±3°C and 25°C±2°C, ensuring a parenteral administration as part of the clinical trial.
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Affiliation(s)
- M L Tall
- Pharmacie, groupement hospitalier Édouard-Herriot, plateforme Fripharm, 5, place d'Arsonval, 69437 Lyon cedex 03, France.
| | - E Diouf
- Pharmacie, groupement hospitalier Édouard-Herriot, plateforme Fripharm, 5, place d'Arsonval, 69437 Lyon cedex 03, France
| | - S Filali
- Pharmacie, groupement hospitalier Édouard-Herriot, plateforme Fripharm, 5, place d'Arsonval, 69437 Lyon cedex 03, France
| | - V Sauvinet
- Centre de recherche en nutrition humaine, Rhône Alpes, centre européen nutrition santé, groupement hospitalier Sud, 165, chemin du Grand-Revoyet, 69495 Pierre-Bénite cedex, France
| | - D Laleye
- Pharmacie, groupement hospitalier Édouard-Herriot, plateforme Fripharm, 5, place d'Arsonval, 69437 Lyon cedex 03, France
| | - C Dhelens
- Pharmacie, groupement hospitalier Édouard-Herriot, plateforme Fripharm, 5, place d'Arsonval, 69437 Lyon cedex 03, France
| | - D Salmon
- Pharmacie, groupement hospitalier Édouard-Herriot, plateforme Fripharm, 5, place d'Arsonval, 69437 Lyon cedex 03, France; Laboratoire de recherche et développement de pharmacie galénique industrielle, faculté de pharmacie, EA 4169 « fonctions physiologiques et pathologiques de la barrière cutanée », université Claude-Bernard Lyon 1, 8, avenue Rockefeller, 69373 Lyon cedex 08, France
| | - L Gabert
- Centre de recherche en nutrition humaine, Rhône Alpes, centre européen nutrition santé, groupement hospitalier Sud, 165, chemin du Grand-Revoyet, 69495 Pierre-Bénite cedex, France
| | - G Nugue
- Centre de recherche biomédicale Edmond-J.-Safra, 17, rue des Martyrs, 38054 Grenoble cedex 9, France; Institut de recherche biomédicale des armées, BP 73, 91223 Brétigny/Orge cedex, France
| | - C Sandre-Balester
- Centre de recherche biomédicale Edmond-J.-Safra, 17, rue des Martyrs, 38054 Grenoble cedex 9, France; Centre hospitalier universitaire de Grenoble, CS 10217, 38043 Grenoble cedex 9, France
| | - F Berger
- Centre de recherche biomédicale Edmond-J.-Safra, 17, rue des Martyrs, 38054 Grenoble cedex 9, France; Centre hospitalier universitaire de Grenoble, CS 10217, 38043 Grenoble cedex 9, France
| | - F Pirot
- Pharmacie, groupement hospitalier Édouard-Herriot, plateforme Fripharm, 5, place d'Arsonval, 69437 Lyon cedex 03, France; Laboratoire de recherche et développement de pharmacie galénique industrielle, faculté de pharmacie, EA 4169 « fonctions physiologiques et pathologiques de la barrière cutanée », université Claude-Bernard Lyon 1, 8, avenue Rockefeller, 69373 Lyon cedex 08, France
| | - C Pivot
- Pharmacie, groupement hospitalier Édouard-Herriot, plateforme Fripharm, 5, place d'Arsonval, 69437 Lyon cedex 03, France
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Tall ML, Lehmann S, Diouf E, Gérard C, Filali S, Gabelle A, Hirtz C, Gabert L, Sauvinet V, Pirot F, Pivot C. [Injectable preparation of labeled leucine with the carbon 13 for a clinical research program on the Alzheimer disease: pharmaceutical control of raw materials and the finished product and stability study]. Ann Pharm Fr 2015; 73:43-59. [PMID: 25577016 DOI: 10.1016/j.pharma.2014.06.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 05/30/2014] [Accepted: 06/09/2014] [Indexed: 11/18/2022]
Abstract
INTRODUCTION The L-leucine labeled (L-[U-(13)C] Leu) is a stable isotopic tracer administered by parenteral route within the framework of a new clinical research program concerning the diagnosis of the Alzheimer's disease. To meet regulatory requirements and have ready to use solution with an expiration date, a pharmaceutical control of raw materials and the finished product followed by a stability study were realised. MATERIALS AND METHOD After the pharmaceutical control of raw materials, the solution of L-[U-(13)C] Leu was prepared according to the good practices preparation. Prepared bottles were stored for 1 year of a share in a climatic chamber (25 °C±2 °C) and the other in a refrigerator (5 °C±3 °C). To assess stability, the physicochemical controls (pH, osmolality, sub-visible particles, L-[U-(13)C] Leu concentration, sodium concentration, isotopic enrichment) and microbiological (bacterial endotoxin and sterility) were performed at regular intervals for 1 year. RESULTS Neither significant decrease of L-[U-(13)C] Leu concentration and sodium concentration nor pH and osmolality variation were observed for 1 year. Isotopic enrichment higher than 99.9% reflected the stability of labelling of L-leucine molecule. The sub-visible particles, the bacterial endotoxin and sterility were in accordance with the European pharmacopoeia attesting limpidity, apyrogenicity and sterility of this injectable preparation. DISCUSSION AND CONCLUSION The injectable preparation of L-[U-(13)C] Leu was stable after 1 year for two preservation conditions, ensuring to safety for administration for human within the framework of this clinical research.
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Affiliation(s)
- M L Tall
- Service pharmaceutique, groupement hospitalier Édouard-Herriot, 5, place d'Arsonval, 69437 Lyon cedex 03, France.
| | - S Lehmann
- Laboratoire de biochimie - protéomique clinique, hôpital St-Éloi, centre hospitalo universitaire de Montpellier, 80, avenue Augustin-Fliche, 34295 Montpellier, France
| | - E Diouf
- Service pharmaceutique, groupement hospitalier Édouard-Herriot, 5, place d'Arsonval, 69437 Lyon cedex 03, France
| | - C Gérard
- Service pharmaceutique, groupement hospitalier Édouard-Herriot, 5, place d'Arsonval, 69437 Lyon cedex 03, France
| | - S Filali
- Service pharmaceutique, groupement hospitalier Édouard-Herriot, 5, place d'Arsonval, 69437 Lyon cedex 03, France
| | - A Gabelle
- Laboratoire de biochimie - protéomique clinique, hôpital St-Éloi, centre hospitalo universitaire de Montpellier, 80, avenue Augustin-Fliche, 34295 Montpellier, France
| | - C Hirtz
- Laboratoire de biochimie - protéomique clinique, hôpital St-Éloi, centre hospitalo universitaire de Montpellier, 80, avenue Augustin-Fliche, 34295 Montpellier, France
| | - L Gabert
- Centre de recherche en nutrition humaine, Rhône-Alpes & centre européen nutrition santé, groupement hospitalier Sud, 165, chemin du Grand-Revoyet, 69495 Pierre-Bénite cedex, France
| | - V Sauvinet
- Centre de recherche en nutrition humaine, Rhône-Alpes & centre européen nutrition santé, groupement hospitalier Sud, 165, chemin du Grand-Revoyet, 69495 Pierre-Bénite cedex, France
| | - F Pirot
- Service pharmaceutique, groupement hospitalier Édouard-Herriot, 5, place d'Arsonval, 69437 Lyon cedex 03, France; Laboratoire de recherche et développement de pharmacie galénique industrielle, faculté de pharmacie, EA 4169 « fonctions physiologiques et pathologiques de la barrière cutanée », université Claude-Bernard Lyon 1, 8, avenue Rockefeller, 69373 Lyon cedex 08, France
| | - C Pivot
- Service pharmaceutique, groupement hospitalier Édouard-Herriot, 5, place d'Arsonval, 69437 Lyon cedex 03, France
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Tall ML, Salmon D, Diouf E, Drai J, Filali S, Lépilliez V, Pioche M, Laleye D, Dhelens C, Ponchon T, Pivot C, Pirot F. [Aseptic process validation and stability study of an injectable preparation of fructose (5%)-glycerol (10%) as part of a hospital clinical research program on endoscopic curative treatment for early epithelial neoplastic lesions of the gastrointestinal tract]. Ann Pharm Fr 2014; 73:139-49. [PMID: 25745945 DOI: 10.1016/j.pharma.2014.09.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 09/05/2014] [Accepted: 09/05/2014] [Indexed: 01/15/2023]
Abstract
INTRODUCTION As part of a hospital clinical research program on endoscopic curative treatment for early epithelial neoplastic lesions of the gastrointestinal tract, a new hospital sterile and non-pyrogenic preparation of fructose (5%)-glycerol (10%) was realized. Under pharmaceutical legislation, the provision of this hospital preparation involves of aseptic process validation and achieve a stability study. MATERIALS AND METHODS After the aseptic process validation with Mediafill Test, the preparation was made under aseptic conditions associated with a sterilizing filtration according to the good practices preparation. Prepared flexible bags (100mL of solution) were stored for one year in a climatic chamber (25±2°C). To assess stability, the physicochemical controls (fructose concentration, glycerol concentration, hydroxy-methyl-5 furfural [5-HMF] concentration, sodium concentration, pH measure, osmolality and sub-visible particles count) and microbiological (bioburden, bacterial endotoxin and sterility) were performed at regular intervals for one year. RESULTS Neither significant decrease of fructose concentration, glycerol concentration and sodium concentration nor pH, 5-HMF, osmolality variations out of specifications were observed for one year. The sub-visible particles count, the bacterial endotoxin and sterility were in accordance with the European pharmacopoeia attesting limpidity, apyrogenicity and sterility of this injectable preparation. DISCUSSION AND CONCLUSION The hospital preparation was stable over one year at 25±2°C, ensuring safe administration in humans within the framework of this clinical research.
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Affiliation(s)
- M L Tall
- Service pharmaceutique, plateforme FRIPHARM, groupement hospitalier Edouard Herriot, 5, place d'Arsonval, 69437 Lyon cedex 03, France.
| | - D Salmon
- Service pharmaceutique, plateforme FRIPHARM, groupement hospitalier Edouard Herriot, 5, place d'Arsonval, 69437 Lyon cedex 03, France; Laboratoire de recherche et développement de pharmacie galénique industrielle, faculté de pharmacie, EA 4169 « fonctions physiologiques et pathologiques de la barrière cutanée », université Claude-Bernard Lyon 1, 8, avenue Rockefeller, 69373 Lyon cedex 08, France
| | - E Diouf
- Service pharmaceutique, plateforme FRIPHARM, groupement hospitalier Edouard Herriot, 5, place d'Arsonval, 69437 Lyon cedex 03, France
| | - J Drai
- Laboratoire de biochimie, centre hospitalier Lyon-Sud, hospices civils de Lyon, 69495 Pierre-Bénite, France; Inserm U1060, laboratoire CarMeN, université Claude Bernard Lyon-1, 69921 Oullins, France
| | - S Filali
- Service pharmaceutique, plateforme FRIPHARM, groupement hospitalier Edouard Herriot, 5, place d'Arsonval, 69437 Lyon cedex 03, France
| | - V Lépilliez
- Service d'hépato-gastro-entérologie, groupement hospitalier Édouard-Herriot, 5, place d'Arsonval, 69437 Lyon cedex 03, France
| | - M Pioche
- Service d'hépato-gastro-entérologie, groupement hospitalier Édouard-Herriot, 5, place d'Arsonval, 69437 Lyon cedex 03, France
| | - D Laleye
- Service pharmaceutique, plateforme FRIPHARM, groupement hospitalier Edouard Herriot, 5, place d'Arsonval, 69437 Lyon cedex 03, France
| | - C Dhelens
- Service pharmaceutique, plateforme FRIPHARM, groupement hospitalier Edouard Herriot, 5, place d'Arsonval, 69437 Lyon cedex 03, France
| | - T Ponchon
- Service d'hépato-gastro-entérologie, groupement hospitalier Édouard-Herriot, 5, place d'Arsonval, 69437 Lyon cedex 03, France
| | - C Pivot
- Service pharmaceutique, plateforme FRIPHARM, groupement hospitalier Edouard Herriot, 5, place d'Arsonval, 69437 Lyon cedex 03, France
| | - F Pirot
- Service pharmaceutique, plateforme FRIPHARM, groupement hospitalier Edouard Herriot, 5, place d'Arsonval, 69437 Lyon cedex 03, France; Laboratoire de recherche et développement de pharmacie galénique industrielle, faculté de pharmacie, EA 4169 « fonctions physiologiques et pathologiques de la barrière cutanée », université Claude-Bernard Lyon 1, 8, avenue Rockefeller, 69373 Lyon cedex 08, France
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Chenau J, Fenaille F, Simon S, Filali S, Volland H, Junot C, Carniel E, Becher F. Detection of Yersinia pestis in environmental and food samples by intact cell immunocapture and liquid chromatography-tandem mass spectrometry. Anal Chem 2014; 86:6144-52. [PMID: 24847944 DOI: 10.1021/ac501371r] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Yersinia pestis is the causative agent of bubonic and pneumonic plague, an acute and often fatal disease in humans. In addition to the risk of natural exposure to plague, there is also the threat of a bioterrorist act, leading to the deliberate spread of the bacteria in the environment or food. We report here an immuno-liquid chromatography-tandem mass spectrometry (immuno-LC-MS/MS) method for the direct (i.e., without prior culture), sensitive, and specific detection of Y. pestis in such complex samples. In the first step, a bottom-up proteomics approach highlighted three relevant protein markers encoded by the Y. pestis-specific plasmids pFra (murine toxin) and pPla (plasminogen activator and pesticin). Suitable proteotypic peptides were thoroughly selected to monitor the three protein markers by targeted MS using the selected reaction monitoring (SRM) mode. Immunocapture conditions were optimized for the isolation and concentration of intact bacterial cells from complex samples. The immuno-LC-SRM assay has a limit of detection of 2 × 10(4) CFU/mL in milk or tap water, which compares well with those of state-of-the-art immunoassays. Moreover, we report the first direct detection of Y. pestis in soil, which could be extremely useful in confirming Y. pestis persistence in the ground.
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Affiliation(s)
- Jérôme Chenau
- Service de Pharmacologie et d'Immunoanalyse, Institut de Biologie et de Technologies de Saclay (iBiTec-S), Commissariat à l'Énergie Atomique et aux Énergies Alternatives (CEA) , 91191 Gif-sur-Yvette, France
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Filali S, Denis I, Dietemann J, Neyron de Meons C, Thibaudin D, Alamartine E, Nuiry O. Comparaison des performances des membranes d’hémodialyse au cours d’une procédure d’appel d’offres. Nephrol Ther 2013. [DOI: 10.1016/j.nephro.2013.07.297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Simon S, Demeure C, Lamourette P, Filali S, Plaisance M, Créminon C, Volland H, Carniel E. Fast and simple detection of Yersinia pestis applicable to field investigation of plague foci. PLoS One 2013; 8:e54947. [PMID: 23383008 PMCID: PMC3558477 DOI: 10.1371/journal.pone.0054947] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Accepted: 12/19/2012] [Indexed: 01/14/2023] Open
Abstract
Yersinia pestis, the plague bacillus, has a rodent-flea-rodent life cycle but can also persist in the environment for various periods of time. There is now a convenient and effective test (F1-dipstick) for the rapid identification of Y. pestis from human patient or rodent samples, but this test cannot be applied to environmental or flea materials because the F1 capsule is mostly produced at 37°C. The plasminogen activator (PLA), a key virulence factor encoded by a Y. pestis-specific plasmid, is synthesized both at 20°C and 37°C, making it a good candidate antigen for environmental detection of Y. pestis by immunological methods. A recombinant PLA protein from Y. pestis synthesized by an Escherichia coli strain was used to produce monoclonal antibodies (mAbs). PLA-specific mAbs devoid of cross-reactions with other homologous proteins were further cloned. A pair of mAbs was selected based on its specificity, sensitivity, comprehensiveness, and ability to react with Y. pestis strains grown at different temperatures. These antibodies were used to develop a highly sensitive one-step PLA-enzyme immunoassay (PLA-EIA) and an immunostrip (PLA-dipstick), usable as a rapid test under field conditions. These two PLA-immunometric tests could be valuable, in addition to the F1-disptick, to confirm human plague diagnosis in non-endemic areas (WHO standard case definition). They have the supplementary advantage of allowing a rapid and easy detection of Y. pestis in environmental and flea samples, and would therefore be of great value for surveillance and epidemiological investigations of plague foci. Finally, they will be able to detect natural or genetically engineered F1-negative Y. pestis strains in human patients and environmental samples.
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Affiliation(s)
- Stéphanie Simon
- CEA Saclay, iBiTec-S, Service de Pharmacologie et d'Immunoanalyse, Laboratoire d'Etudes et de Recherches en Immunoanalyse, Gif sur Yvette, France.
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