Search

Your search keyword '"Florent, Isabelle"' showing total 94 results
Start Over Author "Florent, Isabelle"
94 results on '"Florent, Isabelle"'

51. Redescription of Dicyemennea eledones (Wagener, 1857) (Phylum Dicyemida) from Eledone cirrhosa (Lamarck, 1798) (Mollusca: Cephalopoda: Octopoda)

Author

Bichet, Marion, Touquet, Bastien, Gonzalez, Virginie, Meissner, Markus, Tardieux, Isabelle, Souidenne, Dhikra, Florent, Isabelle, Dellinger, Marc, Romdhane, Mohamed Salah, Grellier, Philippe, Furuya, Hidetaka, Molécules de Communication et Adaptation des Micro-organismes (MCAM), Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS), Institut Cochin (IC UM3 (UMR 8104 / U1016)), Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), École pratique des hautes études (EPHE), Institut Cochin (UMR_S567 / UMR 8104), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Descartes - Paris 5 (UPD5), Institute of Biomedical and Life Sciences, University of Glasgow, Molécules de Communication et Adaptation des Micro-Organismes (MCAM), National Institute of Agronomy of Tunisia, University of Carthage (INAT), Osaka University [Osaka], Université Paris sciences et lettres (PSL), and Muséum national d'Histoire naturelle (MNHN)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
0106 biological sciences, Tunisia, [SDV]Life Sciences [q-bio], Octopodiformes, Zoology, [SDV.BID]Life Sciences [q-bio]/Biodiversity, [SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics, Phylogenetics and taxonomy, 010603 evolutionary biology, 01 natural sciences, Species Specificity, RNA, Ribosomal, 18S, Animals, DNA Barcoding, Taxonomic, 14. Life underwater, Mollusca, Dicyemida, ComputingMilieux_MISCELLANEOUS, Vermiform, biology, Phylum, 010604 marine biology & hydrobiology, Genetic Variation, biology.organism_classification, Invertebrates, Cephalopod, Eledone, [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology, Animal ecology, Parasitology, Taxonomy (biology), France
Abstract

Dicyemids are common parasites found in the kidneys of many cephalopods. Species identification previously relied on old species descriptions containing considerable confusions, casting doubt on taxonomy and identification. Detailed morphological description and genotyping of all developmental stages are required for an exact taxonomy. To this end, we undertook the redescription of the dicyemid Dicyemennea eledones (Wagener, 1857), infecting the cephalopod Eledone cirrhosa (Lamarck). Samples were collected off Concarneau in the Bay of Biscay, France, and off La Goulette in the Gulf of Tunis, Tunisia. Dicyemennea eledones is a large species, with adults reaching c.7,000 μm in length. The vermiform stages are characterised by having 23 peripheral cells, a conical calotte and an axial cell that extends to the base of the propolar cells. An anterior abortive axial cell is present in vermiform embryos. Infusoriform embryos consist of 37 cells; a single nucleus is present in each urn cell and the refringent bodies, which were not always seen, are possibly liquid. For the first time, an 18S rDNA sequence is generated for D. eledones, illustrating genetic differences with the other dicyemid 18S rDNA sequences available in databases. This sequence can now be used for D. eledones barcoding, making the identification of the species easier and more reliable.

Published
2016
Full Text
View/download PDF

52. Open Source Drug Discovery with the Malaria Box Compound Collection for Neglected Diseases and Beyond

Author

Phillips, Margaret A., Van Voorhis, Wesley C., Adams, John H., Adelfio, Roberto, Ahyong, Vida, Akabas, Myles H., Alano, Pietro, Alday, Aintzane, Alsibaee, Aishah, Alzualde, Ainhoa, Andrews, Katherine T., Avery, Simon V., Avery, Vicky M., Ayong, Lawrence, Baker, Mark, Baker, Stephen, Ben Mamoun, Choukri, Bhatia, Sangeeta, Bickle, Quentin, Bounaadja, Lotfi, Bowling, Tana, Boucher, Lauren E., Boyom, Fabrice F., Brea, Jose, Brennan, Marian, Burton, Audrey, Caffrey, Conor R., Camarda, Grazia, Carrasquilla, Manuela, Carter, Dee, Belen Cassera, Maria, Chih-Chien Cheng, Ken, Chindaudomsate, Worathad, Chubb, Anthony, Colon, Beatrice L., Corbett, Yolanda, Crowther, Gregory J., Cowan, Noemi, Le Dang, Na, Delves, Michael, DeRisi, Joseph L., Du, Alan Y., Duffy, Sandra, Abd El-Salam El-Sayed, Shimaa, Ferdig, Michael T., Fidock, David A., Florent, Isabelle, Fokou, Patrick V. T., Galstian, Ani, Gamo, Francisco Javier, Gokool, Suzanne, Gold, Ben, Golub, Todd, Goldgof, Gregory M., Guha, Rajarshi, Guiguemde, W. Armand, Gural, Nil, Guy, R. Kiplin, Hansen, Michael A. E., Hanson, Kirsten K., Hemphill, Andrew, Hooft van Huijsduijnen, Rob, Horii, Takaaki, Horrocks, Paul, Hughes, Tyler B., Huston, Christopher, Igarashi, Ikuo, Ingram-Sieber, Katrin, Itoe, Maurice A., Jadhav, Ajit, Naranuntarat Jensen, Amornrat, Jensen, Laran T., Jiang, Rays H.Y., Kaiser, Annette, Keiser, Jennifer, Ketas, Thomas, Kicka, Sebastien, Kim, Sunyoung, Kirk, Kiaran, Kumar, Vidya P., Kyle, Dennis E., Lafuente, Maria Jose, Landfear, Scott, Lee, Nathan, Lee, Sukjun, Lehane, Adele M., Li, Fengwu, Little, David, Liu, Liqiong, Loza, Maria I., Lubar, Aristea, Lucantoni, Leonardo, Lucet, Isabelle, Maes, Louis, Mancama, Dalu, Mansour, Nuha R., March, Sandra, McGowan, Sheena, Medina Vera, Iset, Meister, Stephan, Mercer, Luke, Mestres, Jordi, Mfopa, Alvine N., Misra, Raj N., Moon, Seunghyun, Moore, John P., Morais Rodrigues da Costa, Francielly, Muriana, Arantza, Nakazawa Hewitt, Stephen, Nare, Bakela, Nathan, Carl, Narraidoo, Nathalie, Nawaratna, Sujeevi, Ojo, Kayode K., Ortiz, Diana, Panic, Gordana, Papadatos, George, Parapini, Silvia, Patra, Kailash, Pham, Ngoc, Prats, Sarah, Plouffe, David M., Poulsen, Sally-Ann, Pradhan, Anupam, Quevedo, Celia, Quinn, Ronald J., Rice, Christopher A., Abdo Rizk, Mohamed, Ruecker, Andrea, St. Onge, Robert, Salgado Ferreira, Rafaela, Samra, Jasmeet, Robinett, Natalie G., Schlecht, Ulrich, Schmitt, Marjorie, Silva Villela, Filipe, Silvestrini, Francesco, Sinden, Robert, Smith, Dennis A., Soldati, Thierry, Stamm, Serge Maximilian, Sullivan, David J., Sullivan, William, Suresh, Sundari, Suzuki, Brian M., Suzuki, Yo, Swamidass, S. Joshua, Taramelli, Donatella, Tchokouaha, Lauve R.Y., Theron, Anjo, Thomas, David, Tonissen, Kathryn F., Townson, Simon, Tripathi, Abhai K., Trofimov, Valentin, Udenze, Kenneth O., Ullah, Imran, Vallieres, Cindy, Vigil, Edgar, Vinetz, Joseph M., Voong Vinh, Phat, Vu, Hoan, Watanabe, Nao-aki, Weatherby, Kate, White, Pamela M., Wilks, Andrew F., Winzeler, Elizabeth A., Wojcik, Edward, Wree, Melanie, Wu, Wesley, Yokoyama, Naoaki, Zollo, Paul H. A., Abla, Nada, Blasco, Benjamin, Burrows, Jeremy, Leroy, Didier, Spangenberg, Thomas, Wells, Timothy, and Willis, Paul A.

Abstract

A major cause of the paucity of new starting points for drug discovery is the lack of interaction between academia and industry. Much of the global resource in biology is present in universities, whereas the focus of medicinal chemistry is still largely within industry. Open source drug discovery, with sharing of information, is clearly a first step towards overcoming this gap. But the interface could especially be bridged through a scale-up of open sharing of physical compounds, which would accelerate the finding of new starting points for drug discovery. The Medicines for Malaria Venture Malaria Box is a collection of over 400 compounds representing families of structures identified in phenotypic screens of pharmaceutical and academic libraries against the Plasmodium falciparum malaria parasite. The set has now been distributed to almost 200 research groups globally in the last two years, with the only stipulation that information from the screens is deposited in the public domain. This paper reports for the first time on 236 screens that have been carried out against the Malaria Box and compares these results with 55 assays that were previously published, in a format that allows a meta-analysis of the combined dataset. The combined biochemical and cellular assays presented here suggest mechanisms of action for 135 (34%) of the compounds active in killing multiple life-cycle stages of the malaria parasite, including asexual blood, liver, gametocyte, gametes and insect ookinete stages. In addition, many compounds demonstrated activity against other pathogens, showing hits in assays with 16 protozoa, 7 helminths, 9 bacterial and mycobacterial species, the dengue fever mosquito vector, and the NCI60 human cancer cell line panel of 60 human tumor cell lines. Toxicological, pharmacokinetic and metabolic properties were collected on all the compounds, assisting in the selection of the most promising candidates for murine proof-of-concept experiments and medicinal chemistry programs. The data for all of these assays are presented and analyzed to show how outstanding leads for many indications can be selected. These results reveal the immense potential for translating the dispersed expertise in biological assays involving human pathogens into drug discovery starting points, by providing open access to new families of molecules, and emphasize how a small additional investment made to help acquire and distribute compounds, and sharing the data, can catalyze drug discovery for dozens of different indications. Another lesson is that when multiple screens from different groups are run on the same library, results can be integrated quickly to select the most valuable starting points for subsequent medicinal chemistry efforts.

Published
2016

55. Open Source Drug Discovery with the Malaria Box Compound Collection for Neglected Diseases and Beyond

Author

Institute for Medical Engineering and Science, Harvard University--MIT Division of Health Sciences and Technology, Bhatia, Sangeeta N, Van Voorhis, Wesley C., Adams, John H., Adelfio, Roberto, Ahyong, Vida, Akabas, Myles H., Alano, Pietro, Alday, Aintzane, Yesmalie, Alemán Resto, Alsibaee, Aishah, Alzualde, Ainhoa, Andrews, Katherine T., Avery, Simon V., Avery, Vicky M., Ayong, Lawrence, Baker, Mark, Baker, Stephen, Ben Mamoun, Choukri, Bickle, Quentin, Bounaadja, Lotfi, Bowling, Tana, Bosch, Jürgen, Boucher, Lauren E., Boyom, Fabrice F., Brea, Jose, Brennan, Marian, Burton, Audrey, Caffrey, Conor R., Camarda, Grazia, Carrasquilla, Manuela, Carter, Dee, Cassera, Maria Belen, Ken, Chih-Chien Cheng, Chindaudomsate, Worathad, Chubb, Anthony, Colon, Beatrice L., Colón-López, Daisy D., Corbett, Yolanda, Crowther, Gregory J., Cowan, Noemi, D’Alessandro, Sarah, Le Dang, Na, Delves, Michael, DeRisi, Joseph L., Du, Alan Y., Duffy, Sandra, Abd El-Salam El-Sayed, Shimaa, Ferdig, Michael T., Fernández Robledo, José A., Fidock, David A., Florent, Isabelle, Fokou, Patrick V. T., Galstian, Ani, Gamo, Francisco Javier, Gokool, Suzanne, Gold, Ben, Golub, Todd, Goldgof, Gregory M., Guha, Rajarshi, Guiguemde, W. Armand, Gural, Nil, Guy, R. Kiplin, Hansen, Michael A. E., Hanson, Kirsten K., Hemphill, Andrew, Hooft van Huijsduijnen, Rob, Horii, Takaaki, Horrocks, Paul, Hughes, Tyler B., Huston, Christopher, Igarashi, Ikuo, Ingram-Sieber, Katrin, Itoe, Maurice A., Jadhav, Ajit, Naranuntarat Jensen, Amornrat, Jensen, Laran T., Jiang, Rays H. Y., Kaiser, Annette, Keiser, Jennifer, Ketas, Thomas, Kicka, Sebastien, Kim, Sunyoung, Kirk, Kiaran, Kumar, Vidya P., Kyle, Dennis E., Lafuente, Maria Jose, Landfear, Scott, Lee, Nathan, Lee, Sukjun, Lehane, Adele M., Li, Fengwu, Little, David, Liu, Liqiong, Llinás, Manuel, Loza, Maria I., Lubar, Aristea, Lucantoni, Leonardo, Lucet, Isabelle, Maes, Louis, Mancama, Dalu, Mansour, Nuha R., March, Sandra, McGowan, Sheena, Medina Vera, Iset, Meister, Stephan, Mercer, Luke, Mestres, Jordi, Mfopa, Alvine N., Misra, Raj N., Moon, Seunghyun, Moore, John P., Morais Rodrigues da Costa, Francielly, Müller, Joachim, Muriana, Arantza, Nakazawa Hewitt, Stephen, Nare, Bakela, Nathan, Carl, Narraidoo, Nathalie, Nawaratna, Sujeevi, Ojo, Kayode K., Ortiz, Diana, Panic, Gordana, Papadatos, George, Parapini, Silvia, Patra, Kailash, Pham, Ngoc, Prats, Sarah, Plouffe, David M., Poulsen, Sally-Ann, Pradhan, Anupam, Quevedo, Celia, Quinn, Ronald J., Rice, Christopher A., Ruecker, Andrea, St. Onge, Robert, Salgado Ferreira, Rafaela, Samra, Jasmeet, Robinett, Natalie G., Schlecht, Ulrich, Schmitt, Marjorie, Silva Villela, Filipe, Silvestrini, Francesco, Sinden, Robert, Smith, Dennis A., Soldati, Thierry, Spitzmüller, Andreas, Stamm, Serge Maximilian, Sullivan, David J., Sullivan, William, Suresh, Sundari, Suzuki, Brian M., Suzuki, Yo, Swamidass, S. Joshua, Taramelli, Donatella, Tchokouaha, Lauve R. Y., Theron, Anjo, Thomas, David, Tonissen, Kathryn F., Townson, Simon, Tripathi, Abhai K., Trofimov, Valentin, Udenze, Kenneth O., Ullah, Imran, Vallieres, Cindy, Vigil, Edgar, Vinetz, Joseph M., Voong Vinh, Phat, Vu, Hoan, Watanabe, Nao-aki, Weatherby, Kate, White, Pamela M., Wilks, Andrew F., Winzeler, Elizabeth A., Wojcik, Edward, Wree, Melanie, Wu, Wesley, Yokoyama, Naoaki, Zollo, Paul H. A., Abla, Nada, Blasco, Benjamin, Burrows, Jeremy, Laleu, Benoît, Leroy, Didier, Spangenberg, Thomas, Wells, Timothy, Willis, Paul A., Institute for Medical Engineering and Science, Harvard University--MIT Division of Health Sciences and Technology, Bhatia, Sangeeta N, Van Voorhis, Wesley C., Adams, John H., Adelfio, Roberto, Ahyong, Vida, Akabas, Myles H., Alano, Pietro, Alday, Aintzane, Yesmalie, Alemán Resto, Alsibaee, Aishah, Alzualde, Ainhoa, Andrews, Katherine T., Avery, Simon V., Avery, Vicky M., Ayong, Lawrence, Baker, Mark, Baker, Stephen, Ben Mamoun, Choukri, Bickle, Quentin, Bounaadja, Lotfi, Bowling, Tana, Bosch, Jürgen, Boucher, Lauren E., Boyom, Fabrice F., Brea, Jose, Brennan, Marian, Burton, Audrey, Caffrey, Conor R., Camarda, Grazia, Carrasquilla, Manuela, Carter, Dee, Cassera, Maria Belen, Ken, Chih-Chien Cheng, Chindaudomsate, Worathad, Chubb, Anthony, Colon, Beatrice L., Colón-López, Daisy D., Corbett, Yolanda, Crowther, Gregory J., Cowan, Noemi, D’Alessandro, Sarah, Le Dang, Na, Delves, Michael, DeRisi, Joseph L., Du, Alan Y., Duffy, Sandra, Abd El-Salam El-Sayed, Shimaa, Ferdig, Michael T., Fernández Robledo, José A., Fidock, David A., Florent, Isabelle, Fokou, Patrick V. T., Galstian, Ani, Gamo, Francisco Javier, Gokool, Suzanne, Gold, Ben, Golub, Todd, Goldgof, Gregory M., Guha, Rajarshi, Guiguemde, W. Armand, Gural, Nil, Guy, R. Kiplin, Hansen, Michael A. E., Hanson, Kirsten K., Hemphill, Andrew, Hooft van Huijsduijnen, Rob, Horii, Takaaki, Horrocks, Paul, Hughes, Tyler B., Huston, Christopher, Igarashi, Ikuo, Ingram-Sieber, Katrin, Itoe, Maurice A., Jadhav, Ajit, Naranuntarat Jensen, Amornrat, Jensen, Laran T., Jiang, Rays H. Y., Kaiser, Annette, Keiser, Jennifer, Ketas, Thomas, Kicka, Sebastien, Kim, Sunyoung, Kirk, Kiaran, Kumar, Vidya P., Kyle, Dennis E., Lafuente, Maria Jose, Landfear, Scott, Lee, Nathan, Lee, Sukjun, Lehane, Adele M., Li, Fengwu, Little, David, Liu, Liqiong, Llinás, Manuel, Loza, Maria I., Lubar, Aristea, Lucantoni, Leonardo, Lucet, Isabelle, Maes, Louis, Mancama, Dalu, Mansour, Nuha R., March, Sandra, McGowan, Sheena, Medina Vera, Iset, Meister, Stephan, Mercer, Luke, Mestres, Jordi, Mfopa, Alvine N., Misra, Raj N., Moon, Seunghyun, Moore, John P., Morais Rodrigues da Costa, Francielly, Müller, Joachim, Muriana, Arantza, Nakazawa Hewitt, Stephen, Nare, Bakela, Nathan, Carl, Narraidoo, Nathalie, Nawaratna, Sujeevi, Ojo, Kayode K., Ortiz, Diana, Panic, Gordana, Papadatos, George, Parapini, Silvia, Patra, Kailash, Pham, Ngoc, Prats, Sarah, Plouffe, David M., Poulsen, Sally-Ann, Pradhan, Anupam, Quevedo, Celia, Quinn, Ronald J., Rice, Christopher A., Ruecker, Andrea, St. Onge, Robert, Salgado Ferreira, Rafaela, Samra, Jasmeet, Robinett, Natalie G., Schlecht, Ulrich, Schmitt, Marjorie, Silva Villela, Filipe, Silvestrini, Francesco, Sinden, Robert, Smith, Dennis A., Soldati, Thierry, Spitzmüller, Andreas, Stamm, Serge Maximilian, Sullivan, David J., Sullivan, William, Suresh, Sundari, Suzuki, Brian M., Suzuki, Yo, Swamidass, S. Joshua, Taramelli, Donatella, Tchokouaha, Lauve R. Y., Theron, Anjo, Thomas, David, Tonissen, Kathryn F., Townson, Simon, Tripathi, Abhai K., Trofimov, Valentin, Udenze, Kenneth O., Ullah, Imran, Vallieres, Cindy, Vigil, Edgar, Vinetz, Joseph M., Voong Vinh, Phat, Vu, Hoan, Watanabe, Nao-aki, Weatherby, Kate, White, Pamela M., Wilks, Andrew F., Winzeler, Elizabeth A., Wojcik, Edward, Wree, Melanie, Wu, Wesley, Yokoyama, Naoaki, Zollo, Paul H. A., Abla, Nada, Blasco, Benjamin, Burrows, Jeremy, Laleu, Benoît, Leroy, Didier, Spangenberg, Thomas, Wells, Timothy, and Willis, Paul A.

Abstract

A major cause of the paucity of new starting points for drug discovery is the lack of interaction between academia and industry. Much of the global resource in biology is present in universities, whereas the focus of medicinal chemistry is still largely within industry. Open source drug discovery, with sharing of information, is clearly a first step towards overcoming this gap. But the interface could especially be bridged through a scale-up of open sharing of physical compounds, which would accelerate the finding of new starting points for drug discovery. The Medicines for Malaria Venture Malaria Box is a collection of over 400 compounds representing families of structures identified in phenotypic screens of pharmaceutical and academic libraries against the Plasmodium falciparum malaria parasite. The set has now been distributed to almost 200 research groups globally in the last two years, with the only stipulation that information from the screens is deposited in the public domain. This paper reports for the first time on 236 screens that have been carried out against the Malaria Box and compares these results with 55 assays that were previously published, in a format that allows a meta-analysis of the combined dataset. The combined biochemical and cellular assays presented here suggest mechanisms of action for 135 (34%) of the compounds active in killing multiple life-cycle stages of the malaria parasite, including asexual blood, liver, gametocyte, gametes and insect ookinete stages. In addition, many compounds demonstrated activity against other pathogens, showing hits in assays with 16 protozoa, 7 helminths, 9 bacterial and mycobacterial species, the dengue fever mosquito vector, and the NCI60 human cancer cell line panel of 60 human tumor cell lines. Toxicological, pharmacokinetic and metabolic properties were collected on all the compounds, assisting in the selection of the most promising candidates for murine proof-of-concept experiments and medicinal chemis

Published
2017

56. Deconjugated Bile Salts Produced by Extracellular Bile-Salt Hydrolase-Like Activities from the Probiotic Lactobacillus johnsonii La1 Inhibit Giardia duodenalis In vitro Growth

Author

Travers, Marie-agnes, Sow, Cisse, Zirah, Severine, Deregnaucourt, Christiane, Chaouch, Soraya, Queiroz, Rayner M. L., Charneau, Sebastien, Allain, Thibault, Florent, Isabelle, Grellier, Philippe, Travers, Marie-agnes, Sow, Cisse, Zirah, Severine, Deregnaucourt, Christiane, Chaouch, Soraya, Queiroz, Rayner M. L., Charneau, Sebastien, Allain, Thibault, Florent, Isabelle, and Grellier, Philippe

Abstract

Giardiasis, currently considered a neglected disease, is caused by the intestinal protozoan parasite Giardia duodenalis and is widely spread in human as well as domestic and wild animals. The lack of appropriate medications and the spread of resistant parasite strains urgently call for the development of novel therapeutic strategies. Host microbiota or certain probiotic strains have the capacity to provide some protection against giardiasis. By combining biological and biochemical approaches, we have been able to decipher a molecular mechanism used by the probiotic strain Lactobacillus johnsonii La1 to prevent Giardia growth in vitro. We provide evidence that the supernatant of this strain contains active principle(s) not directly toxic to Giardia but able to convert non-toxic components of bile into components highly toxic to Giardia. By using bile acid profiling, these components were identified as deconjugated bile-salts. A bacterial bile-salt-hydrolase of commercial origin was able to mimic the properties of the supernatant. Mass spectrometric analysis of the bacterial supernatant identified two of the three bile-salt-hydrolases encoded in the genome of this probiotic strain. These observations document a possible mechanism by which L. johnsonii La1, by secreting, or releasing BSH-like activity(ies) in the vicinity of replicating Giardia in an environment where bile is present and abundant, can fight this parasite. This discovery has both fundamental and applied outcomes to fight giardiasis, based on local delivery of deconjugated bile salts, enzyme deconjugation of bile components, or natural or recombinant probiotic strains that secrete or release such deconjugating activities in a compartment where both bile salts and Giardia are present.

Published
2016
Full Text
View/download PDF

57. Open Source Drug Discovery with the Malaria Box Compound Collection for Neglected Diseases and Beyond

Author

Van Voorhis, Wesley C., Adams, John H., Adelfio, Roberto, Ahyong, Vida, Akabas, Myles H., Alano, Pietro, Alday, Aintzane, Resto, Yesmalie Aleman, Alsibaee, Aishah, Alzualde, Ainhoa, Andrews, Katherine T., Avery, Simon V., Avery, Vicky M., Ayong, Lawrence, Baker, Mark, Baker, Stephen, Ben Mamoun, Choukri, Bhatia, Sangeeta, Bickle, Quentin, Bounaadja, Lotfi, Bowling, Tana, Bosch, Juergen, Boucher, Lauren E., Boyom, Fabrice F., Brea, Jose, Brennan, Marian, Burton, Audrey, Caffrey, Conor R., Camarda, Grazia, Carrasquilla, Manuela, Carter, Dee, Cassera, Maria B., Cheng, Ken Chih-Chien, Chindaudomsate, Worathad, Chubb, Anthony, Colon, Beatrice L., Colon-Lopez, Daisy D., Corbett, Yolanda, Crowther, Gregory J., Cowan, Noemi, D'Alessandro, Sarah, Le Dang, Na, Delves, Michael, DeRisi, Joseph L., Du, Alan Y., Duffy, Sandra, El-Sayed, Shimaa Abd El-Salam, Ferdig, Michael T., Robledo, Jose A. Fernandez, Fidock, David A., Florent, Isabelle, Fokou, Patrick V. T., Galstian, Ani, Javier Gamo, Francisco, Gokool, Suzanne, Gold, Ben, Golub, Todd, Goldgof, Gregory M., Guha, Rajarshi, Guiguemde, W. Armand, Gural, Nil, Guy, R. Kiplin, Hansen, Michael A. E., Hanson, Kirsten K., Hemphill, Andrew, van Huijsduijnen, Rob Hooft, Horii, Takaaki, Horrocks, Paul, Hughes, Tyler B., Huston, Christopher, Igarashi, Ikuo, Ingram-Sieber, Katrin, Itoe, Maurice A., Jadhav, Ajit, Jensen, Amornrat Naranuntarat, Jensen, Laran T., Jiang, Rays H. Y., Kaiser, Annette, Keiser, Jennifer, Ketas, Thomas, Kicka, Sebastien, Kim, Sunyoung, Kirk, Kiaran, Kumar, Vidya P., Kyle, Dennis E., Jose Lafuente, Maria, Landfear, Scott, Lee, Nathan, Lee, Sukjun, Lehane, Adele M., Li, Fengwu, Little, David, Liu, Liqiong, Llinas, Manuel, Loza, Maria I., Lubar, Aristea, Lucantoni, Leonardo, Lucet, Isabelle, Maes, Louis, Mancama, Dalu, Mansour, Nuha R., March, Sandra, McGowan, Sheena, Vera, Iset Medina, Meister, Stephan, Mercer, Luke, Mestres, Jordi, Mfopa, Alvine N., Misra, Raj N., Moon, Seunghyun, Moore, John P., Rodrigues da Costa, Francielly Morais, Mueller, Joachim, Muriana, Arantza, Hewitt, Stephen Nakazawa, Nare, Bakela, Nathan, Carl, Narraidoo, Nathalie, Nawaratna, Sujeevi, Ojo, Kayode K., Ortiz, Diana, Panic, Gordana, Papadatos, George, Parapini, Silvia, Patra, Kailash, Ngoc Pham, Prats, Sarah, Plouffe, David M., Poulsen, Sally-Ann, Pradhan, Anupam, Quevedo, Celia, Quinn, Ronald J., Rice, Christopher A., Rizk, Mohamed Abdo, Ruecker, Andrea, St Onge, Robert, Ferreira, Rafaela Salgado, Samra, Jasmeet, Robinett, Natalie G., Schlecht, Ulrich, Schmitt, Marjorie, Villela, Filipe Silva, Silvestrini, Francesco, Sinden, Robert, Smith, Dennis A., Soldati, Thierry, Spitzmueller, Andreas, Stamm, Serge Maximilian, Sullivan, David J., Sullivan, William G., Suresh, Sundari, Suzuki, Brian M., Suzuki, Yo, Swamidass, S. Joshua, Taramelli, Donatella, Tchokouaha, Lauve R. Y., Theron, Anjo, Thomas, David, Tonissen, Kathryn F., Townson, Simon, Tripathi, Abhai K., Trofimov, Valentin, Udenze, Kenneth O., Ullah, Imran, Vallieres, Cindy, Vigil, Edgar, Vinetz, Joseph M., Phat Voong Vinh, Hoan Vu, Watanabe, Nao-aki, Weatherby, Kate, White, Pamela M., Wilks, Andrew F., Winzeler, Elizabeth A., Wojcik, Edward, Wree, Melanie, Wu, Wesley, Yokoyama, Naoaki, Zollo, Paul H. A., Abla, Nada, Blasco, Benjamin, Burrows, Jeremy, Laleu, Benoit, Leroy, Didier, Spangenberg, Thomas, Wells, Timothy, Willis, Paul A., Van Voorhis, Wesley C., Adams, John H., Adelfio, Roberto, Ahyong, Vida, Akabas, Myles H., Alano, Pietro, Alday, Aintzane, Resto, Yesmalie Aleman, Alsibaee, Aishah, Alzualde, Ainhoa, Andrews, Katherine T., Avery, Simon V., Avery, Vicky M., Ayong, Lawrence, Baker, Mark, Baker, Stephen, Ben Mamoun, Choukri, Bhatia, Sangeeta, Bickle, Quentin, Bounaadja, Lotfi, Bowling, Tana, Bosch, Juergen, Boucher, Lauren E., Boyom, Fabrice F., Brea, Jose, Brennan, Marian, Burton, Audrey, Caffrey, Conor R., Camarda, Grazia, Carrasquilla, Manuela, Carter, Dee, Cassera, Maria B., Cheng, Ken Chih-Chien, Chindaudomsate, Worathad, Chubb, Anthony, Colon, Beatrice L., Colon-Lopez, Daisy D., Corbett, Yolanda, Crowther, Gregory J., Cowan, Noemi, D'Alessandro, Sarah, Le Dang, Na, Delves, Michael, DeRisi, Joseph L., Du, Alan Y., Duffy, Sandra, El-Sayed, Shimaa Abd El-Salam, Ferdig, Michael T., Robledo, Jose A. Fernandez, Fidock, David A., Florent, Isabelle, Fokou, Patrick V. T., Galstian, Ani, Javier Gamo, Francisco, Gokool, Suzanne, Gold, Ben, Golub, Todd, Goldgof, Gregory M., Guha, Rajarshi, Guiguemde, W. Armand, Gural, Nil, Guy, R. Kiplin, Hansen, Michael A. E., Hanson, Kirsten K., Hemphill, Andrew, van Huijsduijnen, Rob Hooft, Horii, Takaaki, Horrocks, Paul, Hughes, Tyler B., Huston, Christopher, Igarashi, Ikuo, Ingram-Sieber, Katrin, Itoe, Maurice A., Jadhav, Ajit, Jensen, Amornrat Naranuntarat, Jensen, Laran T., Jiang, Rays H. Y., Kaiser, Annette, Keiser, Jennifer, Ketas, Thomas, Kicka, Sebastien, Kim, Sunyoung, Kirk, Kiaran, Kumar, Vidya P., Kyle, Dennis E., Jose Lafuente, Maria, Landfear, Scott, Lee, Nathan, Lee, Sukjun, Lehane, Adele M., Li, Fengwu, Little, David, Liu, Liqiong, Llinas, Manuel, Loza, Maria I., Lubar, Aristea, Lucantoni, Leonardo, Lucet, Isabelle, Maes, Louis, Mancama, Dalu, Mansour, Nuha R., March, Sandra, McGowan, Sheena, Vera, Iset Medina, Meister, Stephan, Mercer, Luke, Mestres, Jordi, Mfopa, Alvine N., Misra, Raj N., Moon, Seunghyun, Moore, John P., Rodrigues da Costa, Francielly Morais, Mueller, Joachim, Muriana, Arantza, Hewitt, Stephen Nakazawa, Nare, Bakela, Nathan, Carl, Narraidoo, Nathalie, Nawaratna, Sujeevi, Ojo, Kayode K., Ortiz, Diana, Panic, Gordana, Papadatos, George, Parapini, Silvia, Patra, Kailash, Ngoc Pham, Prats, Sarah, Plouffe, David M., Poulsen, Sally-Ann, Pradhan, Anupam, Quevedo, Celia, Quinn, Ronald J., Rice, Christopher A., Rizk, Mohamed Abdo, Ruecker, Andrea, St Onge, Robert, Ferreira, Rafaela Salgado, Samra, Jasmeet, Robinett, Natalie G., Schlecht, Ulrich, Schmitt, Marjorie, Villela, Filipe Silva, Silvestrini, Francesco, Sinden, Robert, Smith, Dennis A., Soldati, Thierry, Spitzmueller, Andreas, Stamm, Serge Maximilian, Sullivan, David J., Sullivan, William G., Suresh, Sundari, Suzuki, Brian M., Suzuki, Yo, Swamidass, S. Joshua, Taramelli, Donatella, Tchokouaha, Lauve R. Y., Theron, Anjo, Thomas, David, Tonissen, Kathryn F., Townson, Simon, Tripathi, Abhai K., Trofimov, Valentin, Udenze, Kenneth O., Ullah, Imran, Vallieres, Cindy, Vigil, Edgar, Vinetz, Joseph M., Phat Voong Vinh, Hoan Vu, Watanabe, Nao-aki, Weatherby, Kate, White, Pamela M., Wilks, Andrew F., Winzeler, Elizabeth A., Wojcik, Edward, Wree, Melanie, Wu, Wesley, Yokoyama, Naoaki, Zollo, Paul H. A., Abla, Nada, Blasco, Benjamin, Burrows, Jeremy, Laleu, Benoit, Leroy, Didier, Spangenberg, Thomas, Wells, Timothy, and Willis, Paul A.

Abstract

A major cause of the paucity of new starting points for drug discovery is the lack of interaction between academia and industry. Much of the global resource in biology is present in universities, whereas the focus of medicinal chemistry is still largely within industry. Open source drug discovery, with sharing of information, is clearly a first step towards overcoming this gap. But the interface could especially be bridged through a scale-up of open sharing of physical compounds, which would accelerate the finding of new starting points for drug discovery. The Medicines for Malaria Venture Malaria Box is a collection of over 400 compounds representing families of structures identified in phenotypic screens of pharmaceutical and academic libraries against the Plasmodium falciparum malaria parasite. The set has now been distributed to almost 200 research groups globally in the last two years, with the only stipulation that information from the screens is deposited in the public domain. This paper reports for the first time on 236 screens that have been carried out against the Malaria Box and compares these results with 55 assays that were previously published, in a format that allows a meta-analysis of the combined dataset. The combined biochemical and cellular assays presented here suggest mechanisms of action for 135 (34%) of the compounds active in killing multiple life-cycle stages of the malaria parasite, including asexual blood, liver, gametocyte, gametes and insect ookinete stages. In addition, many compounds demonstrated activity against other pathogens, showing hits in assays with 16 protozoa, 7 helminths, 9 bacterial and mycobacterial species, the dengue fever mosquito vector, and the NCI60 human cancer cell line panel of 60 human tumor cell lines. Toxicological, pharmacokinetic and metabolic properties were collected on all the compounds, assisting in the selection of the most promising candidates for murine proof-of-concept experiments and medicinal chemis

Published
2016
Full Text
View/download PDF

58. Open Source Drug Discovery with the Malaria Box Compound Collection for Neglected Diseases and Beyond

Author

Biochemistry, Center for Drug Discovery, Van Voorhis, Wesley C., Adams, John H., Adelfio, Roberto, Ahyong, Vida, Akabas, Myles H., Alano, Pietro, Alday, Aintzane, Resto, Yesmalie Aleman, Alsibaee, Aishah, Alzualde, Ainhoa, Andrews, Katherine T., Avery, Simon V., Avery, Vicky M., Ayong, Lawrence, Baker, Mark, Baker, Stephen, Ben Mamoun, Choukri, Bhatia, Sangeeta, Bickle, Quentin, Bounaadja, Lotfi, Bowling, Tana, Bosch, Juergen, Boucher, Lauren E., Boyom, Fabrice F., Brea, Jose, Brennan, Marian, Burton, Audrey, Caffrey, Conor R., Camarda, Grazia, Carrasquilla, Manuela, Carter, Dee, Cassera, Maria B., Cheng, Ken Chih-Chien, Chindaudomsate, Worathad, Chubb, Anthony, Colon, Beatrice L., Colon-Lopez, Daisy D., Corbett, Yolanda, Crowther, Gregory J., Cowan, Noemi, D'Alessandro, Sarah, Le Dang, Na, Delves, Michael, DeRisi, Joseph L., Du, Alan Y., Duffy, Sandra, El-Sayed, Shimaa Abd El-Salam, Ferdig, Michael T., Robledo, Jose A. Fernandez, Fidock, David A., Florent, Isabelle, Fokou, Patrick V. T., Galstian, Ani, Javier Gamo, Francisco, Gokool, Suzanne, Gold, Ben, Golub, Todd, Goldgof, Gregory M., Guha, Rajarshi, Guiguemde, W. Armand, Gural, Nil, Guy, R. Kiplin, Hansen, Michael A. E., Hanson, Kirsten K., Hemphill, Andrew, van Huijsduijnen, Rob Hooft, Horii, Takaaki, Horrocks, Paul, Hughes, Tyler B., Huston, Christopher, Igarashi, Ikuo, Ingram-Sieber, Katrin, Itoe, Maurice A., Jadhav, Ajit, Jensen, Amornrat Naranuntarat, Jensen, Laran T., Jiang, Rays H. Y., Kaiser, Annette, Keiser, Jennifer, Ketas, Thomas, Kicka, Sebastien, Kim, Sunyoung, Kirk, Kiaran, Kumar, Vidya P., Kyle, Dennis E., Jose Lafuente, Maria, Landfear, Scott, Lee, Nathan, Lee, Sukjun, Lehane, Adele M., Li, Fengwu, Little, David, Liu, Liqiong, Llinas, Manuel, Loza, Maria I., Lubar, Aristea, Lucantoni, Leonardo, Lucet, Isabelle, Maes, Louis, Mancama, Dalu, Mansour, Nuha R., March, Sandra, McGowan, Sheena, Vera, Iset Medina, Meister, Stephan, Mercer, Luke, Mestres, Jordi, Mfopa, Alvine N., Misra, Raj N., Moon, Seunghyun, Moore, John P., Rodrigues da Costa, Francielly Morais, Mueller, Joachim, Muriana, Arantza, Hewitt, Stephen Nakazawa, Nare, Bakela, Nathan, Carl, Narraidoo, Nathalie, Nawaratna, Sujeevi, Ojo, Kayode K., Ortiz, Diana, Panic, Gordana, Papadatos, George, Parapini, Silvia, Patra, Kailash, Ngoc Pham, Prats, Sarah, Plouffe, David M., Poulsen, Sally-Ann, Pradhan, Anupam, Quevedo, Celia, Quinn, Ronald J., Rice, Christopher A., Rizk, Mohamed Abdo, Ruecker, Andrea, St Onge, Robert, Ferreira, Rafaela Salgado, Samra, Jasmeet, Robinett, Natalie G., Schlecht, Ulrich, Schmitt, Marjorie, Villela, Filipe Silva, Silvestrini, Francesco, Sinden, Robert, Smith, Dennis A., Soldati, Thierry, Spitzmueller, Andreas, Stamm, Serge Maximilian, Sullivan, David J., Sullivan, William G., Suresh, Sundari, Suzuki, Brian M., Suzuki, Yo, Swamidass, S. Joshua, Taramelli, Donatella, Tchokouaha, Lauve R. Y., Theron, Anjo, Thomas, David, Tonissen, Kathryn F., Townson, Simon, Tripathi, Abhai K., Trofimov, Valentin, Udenze, Kenneth O., Ullah, Imran, Vallieres, Cindy, Vigil, Edgar, Vinetz, Joseph M., Phat Voong Vinh, Hoan Vu, Watanabe, Nao-aki, Weatherby, Kate, White, Pamela M., Wilks, Andrew F., Winzeler, Elizabeth A., Wojcik, Edward, Wree, Melanie, Wu, Wesley, Yokoyama, Naoaki, Zollo, Paul H. A., Abla, Nada, Blasco, Benjamin, Burrows, Jeremy, Laleu, Benoit, Leroy, Didier, Spangenberg, Thomas, Wells, Timothy, Willis, Paul A., Biochemistry, Center for Drug Discovery, Van Voorhis, Wesley C., Adams, John H., Adelfio, Roberto, Ahyong, Vida, Akabas, Myles H., Alano, Pietro, Alday, Aintzane, Resto, Yesmalie Aleman, Alsibaee, Aishah, Alzualde, Ainhoa, Andrews, Katherine T., Avery, Simon V., Avery, Vicky M., Ayong, Lawrence, Baker, Mark, Baker, Stephen, Ben Mamoun, Choukri, Bhatia, Sangeeta, Bickle, Quentin, Bounaadja, Lotfi, Bowling, Tana, Bosch, Juergen, Boucher, Lauren E., Boyom, Fabrice F., Brea, Jose, Brennan, Marian, Burton, Audrey, Caffrey, Conor R., Camarda, Grazia, Carrasquilla, Manuela, Carter, Dee, Cassera, Maria B., Cheng, Ken Chih-Chien, Chindaudomsate, Worathad, Chubb, Anthony, Colon, Beatrice L., Colon-Lopez, Daisy D., Corbett, Yolanda, Crowther, Gregory J., Cowan, Noemi, D'Alessandro, Sarah, Le Dang, Na, Delves, Michael, DeRisi, Joseph L., Du, Alan Y., Duffy, Sandra, El-Sayed, Shimaa Abd El-Salam, Ferdig, Michael T., Robledo, Jose A. Fernandez, Fidock, David A., Florent, Isabelle, Fokou, Patrick V. T., Galstian, Ani, Javier Gamo, Francisco, Gokool, Suzanne, Gold, Ben, Golub, Todd, Goldgof, Gregory M., Guha, Rajarshi, Guiguemde, W. Armand, Gural, Nil, Guy, R. Kiplin, Hansen, Michael A. E., Hanson, Kirsten K., Hemphill, Andrew, van Huijsduijnen, Rob Hooft, Horii, Takaaki, Horrocks, Paul, Hughes, Tyler B., Huston, Christopher, Igarashi, Ikuo, Ingram-Sieber, Katrin, Itoe, Maurice A., Jadhav, Ajit, Jensen, Amornrat Naranuntarat, Jensen, Laran T., Jiang, Rays H. Y., Kaiser, Annette, Keiser, Jennifer, Ketas, Thomas, Kicka, Sebastien, Kim, Sunyoung, Kirk, Kiaran, Kumar, Vidya P., Kyle, Dennis E., Jose Lafuente, Maria, Landfear, Scott, Lee, Nathan, Lee, Sukjun, Lehane, Adele M., Li, Fengwu, Little, David, Liu, Liqiong, Llinas, Manuel, Loza, Maria I., Lubar, Aristea, Lucantoni, Leonardo, Lucet, Isabelle, Maes, Louis, Mancama, Dalu, Mansour, Nuha R., March, Sandra, McGowan, Sheena, Vera, Iset Medina, Meister, Stephan, Mercer, Luke, Mestres, Jordi, Mfopa, Alvine N., Misra, Raj N., Moon, Seunghyun, Moore, John P., Rodrigues da Costa, Francielly Morais, Mueller, Joachim, Muriana, Arantza, Hewitt, Stephen Nakazawa, Nare, Bakela, Nathan, Carl, Narraidoo, Nathalie, Nawaratna, Sujeevi, Ojo, Kayode K., Ortiz, Diana, Panic, Gordana, Papadatos, George, Parapini, Silvia, Patra, Kailash, Ngoc Pham, Prats, Sarah, Plouffe, David M., Poulsen, Sally-Ann, Pradhan, Anupam, Quevedo, Celia, Quinn, Ronald J., Rice, Christopher A., Rizk, Mohamed Abdo, Ruecker, Andrea, St Onge, Robert, Ferreira, Rafaela Salgado, Samra, Jasmeet, Robinett, Natalie G., Schlecht, Ulrich, Schmitt, Marjorie, Villela, Filipe Silva, Silvestrini, Francesco, Sinden, Robert, Smith, Dennis A., Soldati, Thierry, Spitzmueller, Andreas, Stamm, Serge Maximilian, Sullivan, David J., Sullivan, William G., Suresh, Sundari, Suzuki, Brian M., Suzuki, Yo, Swamidass, S. Joshua, Taramelli, Donatella, Tchokouaha, Lauve R. Y., Theron, Anjo, Thomas, David, Tonissen, Kathryn F., Townson, Simon, Tripathi, Abhai K., Trofimov, Valentin, Udenze, Kenneth O., Ullah, Imran, Vallieres, Cindy, Vigil, Edgar, Vinetz, Joseph M., Phat Voong Vinh, Hoan Vu, Watanabe, Nao-aki, Weatherby, Kate, White, Pamela M., Wilks, Andrew F., Winzeler, Elizabeth A., Wojcik, Edward, Wree, Melanie, Wu, Wesley, Yokoyama, Naoaki, Zollo, Paul H. A., Abla, Nada, Blasco, Benjamin, Burrows, Jeremy, Laleu, Benoit, Leroy, Didier, Spangenberg, Thomas, Wells, Timothy, and Willis, Paul A.

Abstract

A major cause of the paucity of new starting points for drug discovery is the lack of interaction between academia and industry. Much of the global resource in biology is present in universities, whereas the focus of medicinal chemistry is still largely within industry. Open source drug discovery, with sharing of information, is clearly a first step towards overcoming this gap. But the interface could especially be bridged through a scale-up of open sharing of physical compounds, which would accelerate the finding of new starting points for drug discovery. The Medicines for Malaria Venture Malaria Box is a collection of over 400 compounds representing families of structures identified in phenotypic screens of pharmaceutical and academic libraries against the Plasmodium falciparum malaria parasite. The set has now been distributed to almost 200 research groups globally in the last two years, with the only stipulation that information from the screens is deposited in the public domain. This paper reports for the first time on 236 screens that have been carried out against the Malaria Box and compares these results with 55 assays that were previously published, in a format that allows a meta-analysis of the combined dataset. The combined biochemical and cellular assays presented here suggest mechanisms of action for 135 (34%) of the compounds active in killing multiple life-cycle stages of the malaria parasite, including asexual blood, liver, gametocyte, gametes and insect ookinete stages. In addition, many compounds demonstrated activity against other pathogens, showing hits in assays with 16 protozoa, 7 helminths, 9 bacterial and mycobacterial species, the dengue fever mosquito vector, and the NCI60 human cancer cell line panel of 60 human tumor cell lines. Toxicological, pharmacokinetic and metabolic properties were collected on all the compounds, assisting in the selection of the most promising candidates for murine proof-of-concept experiments and medicinal chemis

Published
2016

60. Deconjugated Bile Salts Produced by Extracellular Bile-Salt Hydrolase-Like Activities from the Probiotic Lactobacillus johnsonii La1 Inhibit Giardia duodenalis In vitro Growth

Author

Travers, Marie-Agnès, primary, Sow, Cissé, additional, Zirah, Séverine, additional, Deregnaucourt, Christiane, additional, Chaouch, Soraya, additional, Queiroz, Rayner M. L., additional, Charneau, Sébastien, additional, Allain, Thibault, additional, Florent, Isabelle, additional, and Grellier, Philippe, additional

Published
2016
Full Text
View/download PDF

63. Advances in Antimalarial Drug Evaluation and New Targets for Antimalarials

Author

Florent Isabelle, Deregnaucourt Christiane, Grellier Philippe, Molécules de Communication et Adaptation des Micro-organismes (MCAM), and Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Drug, 0303 health sciences, biology, 030306 microbiology, business.industry, media_common.quotation_subject, Anopheles, Severe disease, Disease, biology.organism_classification, medicine.disease, Plasmodium, 3. Good health, 03 medical and health sciences, [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology, Malaria transmission, Environmental health, parasitic diseases, Protozoa, Medicine, business, ComputingMilieux_MISCELLANEOUS, Malaria, 030304 developmental biology, media_common
Abstract

Parasitic infections due to the protozoa Plasmodium are responsible for malaria, a severe disease that still caused about 225 million cases and 781,000 human deaths in 2009, despite the efforts developed during the last decade to fight this disease (Alonso et al., 2011). The international funding allocated to antimalarial strategies has increased regularly since 2003 from about 0.3 billions to 1.7 billion dollars in 2009 (Collier, 2009), allowing many countries to undertake or strengthen effective fights against the parasite, the disease and the vectors. Nonetheless, more than half of the world population still lives in area where there is a risk of malaria transmission. The difficulty in fighting malaria is that five species of Plasmodium, namely P. ovale, P. malariae, P. vivax, P. falciparum and P. knowlesi (until recently considered as a nonhuman primate parasite) transmitted by over 30 species of Anopheles female mosquitoes are known to cause human malaria. The most virulent, P. falciparum, is responsible for severe clinical malaria and death. Furthermore, an increasing prevalence of resistance of vectors to insecticides, and of parasites to the standard antimalarial drugs has been observed for decades.

Published
2012
Full Text
View/download PDF

64. Probiotics for the Control of Parasites: An Overview

Author

Travers, Marie-Agnès, Florent, Isabelle, Kohl, Linda, and Grellier, Philippe

Subjects
Article Subject
Abstract

Probiotics are defined as live organisms, which confer benefits to the host. Their efficiency was demonstrated for the treatment of gastrointestinal disorders, respiratory infections, and allergic symptoms, but their use is mostly limited to bacterial and viral diseases. During the last decade, probiotics as means for the control of parasite infections were reported covering mainly intestinal diseases but also some nongut infections, that are all of human and veterinary importance. In most cases, evidence for a beneficial effect was obtained by studies using animal models. In a few cases, cellular interactions between probiotics and pathogens or relevant host cells were also investigated using in vitro culture systems. However, molecular mechanisms mediating the beneficial effects are as yet poorly understood. These studies indicate that probiotics might indeed provide a strain-specific protection against parasites, probably through multiple mechanisms. But more unravelling studies are needed to justify probiotic utilisation in therapeutics.

Published
2011
Full Text
View/download PDF

70. Nouveaux triterpènes à activité antiplasmodiale isolés des feuilles de Neoboutonia macrocalyx L., une plante consommée par les chimpanzés du parc national de Kibale (Ouganda)

Author

Namukobe, Jane, primary, Kiremire, Bernard T, additional, Byamukama, Robert, additional, Kasenene, John M, additional, Dumontet, Vincent, additional, Guéritte, Françoise, additional, Krief, Sabrina, additional, Florent, Isabelle, additional, and Kabasa, John D, additional

Published
2013
Full Text
View/download PDF

76. A Plasmodium falciparum FcB1-schizont-EST collection providing clues to schizont specific gene structure and polymorphism

Author

Florent, Isabelle, primary, Porcel, Betina M, additional, Guillaume, Elodie, additional, Da Silva, Corinne, additional, Artiguenave, François, additional, Maréchal, Eric, additional, Bréhélin, Laurent, additional, Gascuel, Olivier, additional, Charneau, Sébastien, additional, Wincker, Patrick, additional, and Grellier, Philippe, additional

Published
2009
Full Text
View/download PDF

80. Corrigendum to: Cloning of Plasmodium falciparum protein disulfide isomerase homologue by affinity purification using the antiplasmodial inhibitor 1,4-bis{3-[N -(cyclohexyl methyl)amino]propyl}piperazine

Author

Florent, Isabelle, primary, Mouray, Elisabeth, additional, Ali, Fouad Dali, additional, Drobecq, Hervé, additional, Girault, Sophie, additional, Schrével, Joseph, additional, Sergheraert, Christian, additional, and Grellier, Philippe, additional

Published
2001
Full Text
View/download PDF

82. Antimalarial screening via large-scale purification of Plasmodium falciparum Ca2+- ATPase 6 and in vitro studies.

Author

David ‐ Bosne, Stéphanie, Florent, Isabelle, Lund ‐ Winther, Anne ‐ Marie, Hansen, John B., Buch ‐ Pedersen, Morten, Machillot, Paul, Maire, Marc, and Jaxel, Christine

Subjects
*ANTIMALARIALS, *PLASMODIUM falciparum, *CALCIUM channels, *ADENOSINE triphosphatase, *MALARIA, *MALARIA vaccines, *ENZYME kinetics
Abstract

The most severe form of human malaria is caused by the parasite Plasmodium falciparum. Despite the current need, there is no effective vaccine and parasites are becoming resistant to most of the antimalarials available. Therefore, there is an urgent need to discover new drugs from targets that have not yet suffered from drug pressure with the aim of overcoming the problem of new emerging resistance. Membrane transporters, such as P. falciparum Ca2+- ATPase 6 ( Pf ATP6), the P. falciparum sarcoplasmic/endoplasmic reticulum Ca2+- ATPase ( SERCA), have been proposed as potentially good antimalarial targets. The present investigation focuses on: (a) the large-scale purification of Pf ATP6 for maintenance of its enzymatic activity; (b) screening for Pf ATP6 inhibitors from a compound library; and (c) the selection of the best inhibitors for further tests on P. falciparum growth in vitro. We managed to heterologously express in yeast and purify an active form of Pf ATP6 as previously described, although in larger amounts. In addition to some classical SERCA inhibitors, a chemical library of 1680 molecules was screened. From these, we selected a pool of the 20 most potent inhibitors of Pf ATP6, presenting half maximal inhibitory concentration values in the range 1-9 μ m. From these, eight were chosen for evaluation of their effect on P. falciparum growth in vitro, and the best compound presented a half maximal inhibitory concentration of ~ 2 μ m. We verified the absence of an inhibitory effect of most of the compounds on mammalian SERCA1a, representing a potential advantage in terms of human toxicity. The present study describes a multidisciplinary approach allowing the selection of promising Pf ATP6-specific inhibitors with good antimalarial activity. [ABSTRACT FROM AUTHOR]

Published
2013
Full Text
View/download PDF

85. Integrative taxonomy confirms that Gregarina garnhamiand G. acridiorum(Apicomplexa, Gregarinidae), parasites of Schistocerca gregariaand Locusta migratoria(Insecta, Orthoptera), are distinct species

Author

Florent, Isabelle, Chapuis, Marie Pierre, Labat, Amandine, Boisard, Julie, Leménager, Nicolas, Michel, Bruno, Desportes-Livage, Isabelle, Florent, Isabelle, Chapuis, Marie Pierre, Labat, Amandine, Boisard, Julie, Leménager, Nicolas, Michel, Bruno, and Desportes-Livage, Isabelle

Abstract

Orthoptera are infected by about 60 species of gregarines assigned to the genus GregarinaDufour, 1828. Among these species, Gregarina garnhamiCanning, 1956 from Schistocerca gregaria(Forsskål, 1775) was considered by Lipa et al. in 1996 to be synonymous with Gregarina acridiorum(Léger 1893), a parasite of several orthopteran species including Locusta migratoria(Linné, 1758). Here, a morphological study and molecular analyses of the SSU rDNA marker demonstrate that specimens of S. gregariaand specimens of L. migratoriaare infected by two distinct Gregarinaspecies, G. garnhamiand G. acridiorum,respectively. Validation of the species confirms that molecular analyses provide useful taxonomical information. Phenotypic plasticity was clearly observed in the case of G. garnhami: the morphology of its trophozoites, gamonts and syzygies varied according to the geographical location of S. gregariaand the subspecies infected.

Published
2021
Full Text
View/download PDF

86. Open source drug discovery with the malaria box compound collection for neglected diseases and beyond

Author

Van Voorhis, Wesley C., Adams, John H., Adelfio, Roberto, Ahyong, Vida, Akabas, Myles H., Alano, Pietro, Alday, Aintzane, Alemán Resto, Yesmalie, Alsibaee, Aishah, Alzualde, Ainhoa, Andrews, Katherine T., Avery, Simon V., Avery, Vicky M., Ayong, Lawrence, Baker, Mark, Baker, Stephen, Ben Mamoun, Choukri, Bhatia, Sangeeta, Bickle, Quentin, Bounaadja, Lotfi, Bowling, Tana, Bosch, Jürgen, Boucher, Lauren E., Boyom, Fabrice F., Brea, Jose, Brennan, Marian, Burton, Audrey, Caffrey, Conor R., Camarda, Grazia, Carrasquilla, Manuela, Carter, Dee, Belen Cassera, Maria, Chih-Chien Cheng, Ken, Chindaudomsate, Worathad, Chubb, Anthony, Colon, Beatrice L., Colón-López, Daisy D., Corbett, Yolanda, Crowther, Gregory J., Cowan, Noemi, D'Alessandro, Sarah, Le Dang, Na, Delves, Michael, DeRisi, Joseph L., Du, Alan Y., Duffy, Sandra, Abd El-Salam El-Sayed, Shimaa, Ferdig, Michael T., Fernández Robledo, José A., Fidock, David A., Florent, Isabelle, Fokou, Patrick V. T., Galstian, Ani, Gamo, Francisco Javier, Gokool, Suzanne, Gold, Ben, Golub, Todd, Goldgof, Gregory M., Guha, Rajarshi, Guiguemde, W. Armand, Gural, Nil, Guy, R. Kiplin, Hansen, Michael A. E., Hanson, Kirsten K., Hemphill, Andrew, Hooft van Huijsduijnen, Rob, Horii, Takaaki, Horrocks, Paul, Hughes, Tyler B., Huston, Christopher, Igarashi, Ikuo, Ingram-Sieber, Katrin, Itoe, Maurice A., Jadhav, Ajit, Naranuntarat Jensen, Amornrat, Jensen, Laran T., Jiang, Rays H. Y., Kaiser, Annette, Keiser, Jennifer, Ketas, Thomas, Kicka, Sebastien, Kim, Sunyoung, Kirk, Kiaran, Kumar, Vidya P., Kyle, Dennis E., Lafuente, Maria Jose, Landfear, Scott, Lee, Nathan, Lee, Sukjun, Lehane, Adele M., Li, Fengwu, Little, David, Liu, Liqiong, Llinás, Manuel, Loza, Maria I., Lubar, Aristea, Lucantoni, Leonardo, Lucet, Isabelle, Maes, Louis, Mancama, Dalu, Mansour, Nuha R., March, Sandra, McGowan, Sheena, Medina Vera, Iset, Meister, Stephan, Mercer, Luke, Mestres, Jordi, Mfopa, Alvine N., Misra, Raj N., Moon, Seunghyun, Moore, John P., Morais Rodrigues da Costa, Francielly, Müller, Joachim, Muriana, Arantza, Nakazawa Hewitt, Stephen, Nare, Bakela, Nathan, Carl, Narraidoo, Nathalie, Nawaratna, Sujeevi, Ojo, Kayode K., Ortiz, Diana, Panic, Gordana, Papadatos, George, Parapini, Silvia, Patra, Kailash, Pham, Ngoc, Prats, Sarah, Plouffe, David M., Poulsen, Sally-Ann, Pradhan, Anupam, Quevedo, Celia, Quinn, Ronald J., Rice, Christopher A., Abdo Rizk, Mohamed, Ruecker, Andrea, St Onge, Robert, Salgado Ferreira, Rafaela, Samra, Jasmeet, Robinett, Natalie G., Schlecht, Ulrich, Schmitt, Marjorie, Silva Villela, Filipe, Silvestrini, Francesco, Sinden, Robert, Smith, Dennis A., Soldati, Thierry, Spitzmüller, Andreas, Stamm, Serge Maximilian, Sullivan, David J., Sullivan, William, Suresh, Sundari, Suzuki, Brian M., Suzuki, Yo, Swamidass, S. Joshua, Taramelli, Donatella, Tchokouaha, Lauve R. Y., Theron, Anjo, Thomas, David, Tonissen, Kathryn F., Townson, Simon, Tripathi, Abhai K., Trofimov, Valentin, Udenze, Kenneth O., Ullah, Imran, Vallieres, Cindy, Vigil, Edgar, Vinetz, Joseph M., Voong Vinh, Phat, Vu, Hoan, Watanabe, Nao-Aki, Weatherby, Kate, White, Pamela M., Wilks, Andrew F., Winzeler, Elizabeth A., Wojcik, Edward, Wree, Melanie, Wu, Wesley, Yokoyama, Naoaki, Zollo, Paul H. A., Abla, Nada, Blasco, Benjamin, Burrows, Jeremy, Laleu, Benoît, Leroy, Didier, Spangenberg, Thomas, Wells, Timothy, and Willis, Paul A.

Subjects
3. Good health

87. MOESM1 of Selective inhibition of PfA-M1, over PfA-M17, by an amino-benzosuberone derivative blocks malaria parasites development in vitro and in vivo

Author

Bounaadja, Lotfi, Schmitt, Marjorie, SĂŠbastien Albrecht, Mouray, Elisabeth, CĂŠline Tarnus, and Florent, Isabelle

Subjects
3. Good health
Abstract

Additional file 1. In vitro and in vivo profile of compound T5. Description of data: The data, detailed in this additional file, comprises a summary table for T5 pharmacokinetic properties, followed by descriptions of the various corresponding assays.

88. MOESM1 of Selective inhibition of PfA-M1, over PfA-M17, by an amino-benzosuberone derivative blocks malaria parasites development in vitro and in vivo

Author

Bounaadja, Lotfi, Schmitt, Marjorie, SĂŠbastien Albrecht, Mouray, Elisabeth, CĂŠline Tarnus, and Florent, Isabelle

Subjects
3. Good health
Abstract

Additional file 1. In vitro and in vivo profile of compound T5. Description of data: The data, detailed in this additional file, comprises a summary table for T5 pharmacokinetic properties, followed by descriptions of the various corresponding assays.

89. Metallopeptidases of Toxoplasma gondii: in silicoidentification and gene expression

Author

Escotte-Binet, Sandie, Huguenin, Antoine, Aubert, Dominique, Martin, Anne-Pascaline, Kaltenbach, Matthieu, Florent, Isabelle, and Villena, Isabelle

Abstract

Metallopeptidases are a family of proteins with domains that remain highly conserved throughout evolution. These hydrolases require divalent metal cation(s) to activate the water molecule in order to carry out their catalytic action on peptide bonds by nucleophilic attack. Metallopeptidases from parasitic protozoa, including Toxoplasma, are investigated because of their crucial role in parasite biology. In the present study, we screened the T. gondiidatabase using PFAM motifs specific for metallopeptidases in association with the MEROPS peptidase Database (release 10.0). In all, 49 genes encoding proteins with metallopeptidase signatures were identified in the Toxoplasmagenome. An Interpro Search enabled us to uncover their domain/motif organization, and orthologs with the highest similarity by BLAST were used for annotation. These 49 Toxoplasmametallopeptidases clustered into 15 families described in the MEROPS database. Experimental expression analysis of their genes in the tachyzoite stage revealed transcription for all genes studied. Further research on the role of these peptidases should increase our knowledge of basic Toxoplasmabiology and provide opportunities to identify novel therapeutic targets. This type of study would also open a path towards the comparative biology of apicomplexans.

Published
2018
Full Text
View/download PDF

90. Diversity of apostome ciliates, Chromidinaspp. (Oligohymenophorea, Opalinopsidae), parasites of cephalopods of the Mediterranean Sea

Author

Souidenne, Dhikra, Florent, Isabelle, Dellinger, Marc, Justine, Jean Lou, Romdhane, Mohamed Salah, Furuya, Hidetaka, and Grellier, Philippe

Abstract

Chromidinaspp. are enigmatic apostome ciliates (Oligohymenophorea, Opalinopsidae) that parasitise the renal and pancreatic appendages of cephalopods. Only four species have been described, among which only three have been formally named. No DNA sequence has been reported so far. To investigate Chromidinaspp. diversity, we sampled cephalopods in the Mediterranean Sea off Tunis, Tunisia, and identified two distinct Chromidinaspp. in two different host species: Loligo vulgarisand Sepia officinalis. From haematoxylin-stained slides, we described morphological traits for these parasitic species and compared them to previous descriptions. We also re-described the morphology of Chromidina elegans(Foettinger, 1881) from Chatton and Lwoff’s original materials and designated a neohapantotype and paraneohapantotypes for this species. We describe a new species, Chromidina chattoniSouidenne, Florent and Grellier n. sp., found in L. vulgarisoff Tunisia, and evidence for a probable novel species, found in S. officinalisoff Tunisia, although this latter species presents similarities to some morphological stages previously described for Chromidina corteziHochberg, 1971. We amplified, for the first time, an 18S rDNA marker for these two Chromidinaspecies. Phylogenetic analysis supports the association of Chromidinawithin apostome ciliates. Genetic distance analysis between 18S rDNA sequences of representative apostomes indicates Pseudocolliniaas the most closely related genus to Chromidina.

Published
2016
Full Text
View/download PDF

92. Discovery of a Noncompetitive Open-Flap Selective Inhibitor of Plasmepsin II with Antiplasmodial Activity.

Author

Valiente PA, Guerra Y, Wolf MG, Pascual I, Rudiño-Piñera E, Florent I, Pons T, and Groenhof G

Subjects
Humans, HEK293 Cells, Protozoan Proteins antagonists & inhibitors, Protozoan Proteins metabolism, Protozoan Proteins chemistry, Drug Discovery, Protein Conformation, Protease Inhibitors pharmacology, Protease Inhibitors chemistry, Aspartic Acid Endopeptidases antagonists & inhibitors, Aspartic Acid Endopeptidases metabolism, Antimalarials pharmacology, Antimalarials chemistry, Molecular Dynamics Simulation, Plasmodium falciparum drug effects, Plasmodium falciparum enzymology
Abstract

Here, we predicted that Plasmepsin II (PlmII) can explore open-flap conformations not sampled for human aspartic proteases: Cathepsin D, Renin, and Pepsin were used in molecular dynamics simulations. We combined 24 independent (50 ns) MD runs to improve the conformational sampling of each system. We discovered two PlmII noncompetitive selective inhibitors: SPB07935 and RH01201, with K i values in the μM range by targeting the open-flap conformations. Both compounds did not inhibit human Cathepsin D (hCatD) at high concentrations. We predicted that SPB07935 and RH01201 bind stably to the flap cryptic pocket, keeping this hairpin in an open or semiopen conformation along the MD simulations, respectively. Significantly, SPB07935 inhibited the P . falciparum chloroquine-resistant strain FcB1 growth in vitro, with an IC 50 value of 8 μM while having a lower toxicity for HEK-293 human cells (CC 50 = 189 μM).

Published
2025
Full Text
View/download PDF

93. Comparative Time-Scale Gene Expression Analysis Highlights the Infection Processes of Two Amoebophrya Strains.

Author

Farhat S, Florent I, Noel B, Kayal E, Da Silva C, Bigeard E, Alberti A, Labadie K, Corre E, Aury JM, Rombauts S, Wincker P, Guillou L, and Porcel BM

Abstract

Understanding factors that generate, maintain, and constrain host-parasite associations is of major interest to biologists. Although little studied, many extremely virulent micro-eukaryotic parasites infecting microalgae have been reported in the marine plankton. This is the case for Amoebophrya , a diverse and highly widespread group of Syndiniales infecting and potentially controlling dinoflagellate populations. Here, we analyzed the time-scale gene expression of a complete infection cycle of two Amoebophrya strains infecting the same host (the dinoflagellate Scrippsiella acuminata ), but diverging by their host range (one infecting a single host, the other infecting more than one species). Over two-thirds of genes showed two-fold differences in expression between at least two sampled stages of the Amoebophrya life cycle. Genes related to carbohydrate metabolism as well as signaling pathways involving proteases and transporters were overexpressed during the free-living stage of the parasitoid. Once inside the host, all genes related to transcription and translation pathways were actively expressed, suggesting the rapid and extensive protein translation needed following host-cell invasion. Finally, genes related to cellular division and components of the flagellum organization were overexpressed during the sporont stage. In order to gain a deeper understanding of the biological basis of the host-parasitoid interaction, we screened proteins involved in host-cell recognition, invasion, and protection against host-defense identified in model apicomplexan parasites. Very few of the genes encoding critical components of the parasitic lifestyle of apicomplexans could be unambiguously identified as highly expressed in Amoebophrya . Genes related to the oxidative stress response were identified as highly expressed in both parasitoid strains. Among them, the correlated expression of superoxide dismutase/ascorbate peroxidase in the specialist parasite was consistent with previous studies on Perkinsus marinus defense. However, this defense process could not be identified in the generalist Amoebophrya strain, suggesting the establishment of different strategies for parasite protection related to host specificity.

Published
2018
Full Text
View/download PDF

94. Bile Salt Hydrolase Activities: A Novel Target to Screen Anti- Giardia Lactobacilli?

Author

Allain T, Chaouch S, Thomas M, Travers MA, Valle I, Langella P, Grellier P, Polack B, Florent I, and Bermúdez-Humarán LG

Abstract

Giardia duodenalis is a protozoan parasite responsible for giardiasis, a disease characterized by intestinal malabsorption, diarrhea and abdominal pain in a large number of mammal species. Giardiasis is one of the most common intestinal parasitic diseases in the world and thus a high veterinary, and public health concern. It is well-established that some probiotic bacteria may confer protection against this parasite in vitro and in vivo and we recently documented the implication of bile-salt hydrolase (BSH)-like activities from strain La1 of Lactobacillus johnsonii as mediators of these effects in vitro . We showed that these activities were able to generate deconjugated bile salts that were toxic to the parasite. In the present study, a wide collection of lactobacilli strains from different ecological origins was screened to assay their anti-giardial effects. Our results revealed that the anti-parasitic effects of some of the strains tested were well-correlated with the expression of BSH-like activities. The two most active strains in vitro , La1 and Lactobacillus gasseri CNCM I-4884, were then tested for their capacity to influence G. duodenalis infection in a suckling mice model. Strikingly, only L. gasseri CNCM I-4884 strain was able to significantly antagonize parasite growth with a dramatic reduction of the trophozoites load in the small intestine. Moreover, this strain also significantly reduced the fecal excretion of Giardia cysts after 5 days of treatment, which could contribute to blocking the transmission of the parasite, in contrast of La1 where no effect was observed. This study represents a step toward the development of new prophylactic strategies to combat G. duodenalis infection in both humans and animals.

Published
2018
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results