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Tahir D, Davoust B, Almeras L, Berenger JM, Varloud M, Parola P. Anti-feeding and insecticidal efficacy of a topical administration of dinotefuran-pyriproxyfen-permethrin spot-on (Vectra® 3D) on mice against Stegomyia albopicta (= Aedes albopictus). Med Vet Entomol 2017; 31:351-357. [PMID: 28714540 DOI: 10.1111/mve.12243] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 03/06/2017] [Accepted: 03/24/2017] [Indexed: 06/07/2023]
Abstract
An ectoparasiticide combining three active ingredients [dinotefuran, permethrin and pyriproxyfen (DPP)] was used in mice in an experiment designed to evaluate its anti-feeding and insecticidal efficacy against Stegomyia albopicta (= Aedes albopictus) (Diptera: Culicidae) mosquitoes. Twenty-two adult mice were randomly allocated into two groups consisting of an untreated control group and a DPP-treated group. Mice were exposed individually for 1 h to a mean ± standard deviation of 27 ± 2 starved female mosquitoes on days 1, 7, 14, 21 and 28 post-treatment. At the end of the exposure (1 h), mosquitoes were assessed for immediate survival and engorgement status. Additionally, live mosquitoes in both groups were incubated separately and observed for mortality at 24 h after the end of the exposure. The anti-feeding efficacy of DPP after the 1-h exposure period was 99.2, 100, 98.0, 89.3 and 87.4% at 1, 7, 14, 21 and 28 days, respectively. Levels of insecticidal efficacy evaluated at 1 h and 24 h after exposure on days 1, 7, 14, 21 and 28 were 36.7, 28.9, 30.8, 23.1 and 11.9%, and 68.4, 45.0, 43.3, 37.9 and 19.9%, respectively. Based on the mouse model, the present study demonstrates that the DPP combination has significant anti-feeding and insecticidal efficacy against S. albopicta for at least 4 weeks.
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Affiliation(s)
- D Tahir
- Unité de Recherche en Maladies Infectieuses et Tropicales Emergentes (URMITE), Aix-Marseille Université, UM63, Centre National de la Recherche Scientifique (CNRS) 7278, Institut de Recherche pour le Développement (IRD) 198 (Dakar), Institut National de la Santé et de la Recherche Médicale (INSERM) 1095, Assistance-Publique Hôpitaux de Marseille (AP-HM) Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
| | - B Davoust
- Unité de Recherche en Maladies Infectieuses et Tropicales Emergentes (URMITE), Aix-Marseille Université, UM63, Centre National de la Recherche Scientifique (CNRS) 7278, Institut de Recherche pour le Développement (IRD) 198 (Dakar), Institut National de la Santé et de la Recherche Médicale (INSERM) 1095, Assistance-Publique Hôpitaux de Marseille (AP-HM) Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
| | - L Almeras
- Unité de Recherche en Maladies Infectieuses et Tropicales Emergentes (URMITE), Aix-Marseille Université, UM63, Centre National de la Recherche Scientifique (CNRS) 7278, Institut de Recherche pour le Développement (IRD) 198 (Dakar), Institut National de la Santé et de la Recherche Médicale (INSERM) 1095, Assistance-Publique Hôpitaux de Marseille (AP-HM) Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
- Unité de Parasitologie et Entomologie, Département des Maladies Infectieuses, Institut de Recherche Biomédicale des Armées, Marseille, France
| | - J M Berenger
- Unité de Recherche en Maladies Infectieuses et Tropicales Emergentes (URMITE), Aix-Marseille Université, UM63, Centre National de la Recherche Scientifique (CNRS) 7278, Institut de Recherche pour le Développement (IRD) 198 (Dakar), Institut National de la Santé et de la Recherche Médicale (INSERM) 1095, Assistance-Publique Hôpitaux de Marseille (AP-HM) Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
| | - M Varloud
- Ceva Santé Animale SA, Libourne, France
| | - P Parola
- Unité de Recherche en Maladies Infectieuses et Tropicales Emergentes (URMITE), Aix-Marseille Université, UM63, Centre National de la Recherche Scientifique (CNRS) 7278, Institut de Recherche pour le Développement (IRD) 198 (Dakar), Institut National de la Santé et de la Recherche Médicale (INSERM) 1095, Assistance-Publique Hôpitaux de Marseille (AP-HM) Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
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Nebbak A, El Hamzaoui B, Berenger JM, Bitam I, Raoult D, Almeras L, Parola P. Comparative analysis of storage conditions and homogenization methods for tick and flea species for identification by MALDI-TOF MS. Med Vet Entomol 2017; 31:438-448. [PMID: 28722283 DOI: 10.1111/mve.12250] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 03/21/2017] [Accepted: 04/20/2017] [Indexed: 06/07/2023]
Abstract
Ticks and fleas are vectors for numerous human and animal pathogens. Controlling them, which is important in combating such diseases, requires accurate identification, to distinguish between vector and non-vector species. Recently, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) was applied to the rapid identification of arthropods. The growth of this promising tool, however, requires guidelines to be established. To this end, standardization protocols were applied to species of Rhipicephalus sanguineus (Ixodida: Ixodidae) Latreille and Ctenocephalides felis felis (Siphonaptera: Pulicidae) Bouché, including the automation of sample homogenization using two homogenizer devices, and varied sample preservation modes for a period of 1-6 months. The MS spectra were then compared with those obtained from manual pestle grinding, the standard homogenization method. Both automated methods generated intense, reproducible MS spectra from fresh specimens. Frozen storage methods appeared to represent the best preservation mode, for up to 6 months, while storage in ethanol is also possible, with some caveats for tick specimens. Carnoy's buffer, however, was shown to be less compatible with MS analysis for the purpose of identifying ticks or fleas. These standard protocols for MALDI-TOF MS arthropod identification should be complemented by additional MS spectrum quality controls, to generalize their use in monitoring arthropods of medical interest.
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Affiliation(s)
- A Nebbak
- Aix Marseille Université, Unité de Recherche en Maladies Infectieuses et Tropicales Emergentes (URMITE), UM63, CNRS 7278, IRD 198 (Dakar, Sénégal), Inserm 1095, Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
- Laboratoire de Biodiversité et Environnement: Interactions génomes, Faculté des Sciences Biologiques, Université des Sciences et de la Technologie Houari Boumediene (USTHB), Bab Ezzouar, Algeria
| | - B El Hamzaoui
- Aix Marseille Université, Unité de Recherche en Maladies Infectieuses et Tropicales Emergentes (URMITE), UM63, CNRS 7278, IRD 198 (Dakar, Sénégal), Inserm 1095, Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
| | - J-M Berenger
- Aix Marseille Université, Unité de Recherche en Maladies Infectieuses et Tropicales Emergentes (URMITE), UM63, CNRS 7278, IRD 198 (Dakar, Sénégal), Inserm 1095, Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
| | - I Bitam
- Aix Marseille Université, Unité de Recherche en Maladies Infectieuses et Tropicales Emergentes (URMITE), UM63, CNRS 7278, IRD 198 (Dakar, Sénégal), Inserm 1095, Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
- Laboratoire de Biodiversité et Environnement: Interactions génomes, Faculté des Sciences Biologiques, Université des Sciences et de la Technologie Houari Boumediene (USTHB), Bab Ezzouar, Algeria
| | - D Raoult
- Aix Marseille Université, Unité de Recherche en Maladies Infectieuses et Tropicales Emergentes (URMITE), UM63, CNRS 7278, IRD 198 (Dakar, Sénégal), Inserm 1095, Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
| | - L Almeras
- Aix Marseille Université, Unité de Recherche en Maladies Infectieuses et Tropicales Emergentes (URMITE), UM63, CNRS 7278, IRD 198 (Dakar, Sénégal), Inserm 1095, Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
- Unité de Parasitologie et Entomologie, Département des Maladies Infectieuses, Institut de Recherche Biomédicale des Armées, Marseille, France
| | - P Parola
- Aix Marseille Université, Unité de Recherche en Maladies Infectieuses et Tropicales Emergentes (URMITE), UM63, CNRS 7278, IRD 198 (Dakar, Sénégal), Inserm 1095, Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
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Tahir D, Davoust B, Varloud M, Berenger JM, Raoult D, Almeras L, Parola P. Assessment of the anti-feeding and insecticidal effects of the combination of dinotefuran, permethrin and pyriproxyfen (Vectra ® 3D) against Triatoma infestans on rats. Med Vet Entomol 2017; 31:132-139. [PMID: 27862092 DOI: 10.1111/mve.12206] [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] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Revised: 07/21/2016] [Accepted: 07/24/2016] [Indexed: 06/06/2023]
Abstract
This study, based on the rat model, was designed to explore the anti-feeding and insecticidal efficacy of a topical ectoparasiticide, dinotefuran-permethrin-pyriproxyfen (DPP), against Triatoma infestans (Hemiptera: Reduviidae), a vector of Trypanosoma cruzi (Trypanosomatida: Trypanosomatidae), for which dogs are domestic reservoir hosts. Twenty rats were divided into two equal groups: untreated and treated. Each rat was exposed under sedation to 16 T. infestans of mixed life stages for 1 h on days 1, 7, 14, 21 and 28 post-treatment. The anti-feeding and insecticidal effects of DPP were estimated after 1 h of exposure. Insecticidal efficacy was also assessed after incubation of the insects for 24 h post-exposure. Anti-feeding efficacy was 96.7, 84.7, 80.5, 81.5 and 42.6% on days 1, 7, 14, 21 and 28, respectively. Insecticidal efficacy evaluated at 1 and 24 h after exposure on days 1, 7, 14, 21 and 28 was 100, 91.2, 82.5, 80.0 and 29.1, and 100, 100, 100, 96.0 and 49.9%, respectively. This study demonstrates that a single administration of DPP spot-on treatment at a dose equivalent to the minimal recommended dose in rats has a powerful effect against T. infestans starting from day 1 that lasts for at least 3 weeks.
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Affiliation(s)
- D Tahir
- Unité de Recherche en Maladies Infectieuses et Tropicales Emergentes (URMITE), UM63, Centre National de la Recherche Scientifique (CNRS) 7278, Institut de Recherche pour le Développement (IRD) 198 (Dakar), Institut National de la Santé et de la Recherche Médicale (INSERM) 1095, Aix-Marseille University, Marseille, France
| | - B Davoust
- Unité de Recherche en Maladies Infectieuses et Tropicales Emergentes (URMITE), UM63, Centre National de la Recherche Scientifique (CNRS) 7278, Institut de Recherche pour le Développement (IRD) 198 (Dakar), Institut National de la Santé et de la Recherche Médicale (INSERM) 1095, Aix-Marseille University, Marseille, France
| | - M Varloud
- Ceva Santé Animale SA, Libourne, France
| | - J-M Berenger
- Unité de Recherche en Maladies Infectieuses et Tropicales Emergentes (URMITE), UM63, Centre National de la Recherche Scientifique (CNRS) 7278, Institut de Recherche pour le Développement (IRD) 198 (Dakar), Institut National de la Santé et de la Recherche Médicale (INSERM) 1095, Aix-Marseille University, Marseille, France
| | - D Raoult
- Unité de Recherche en Maladies Infectieuses et Tropicales Emergentes (URMITE), UM63, Centre National de la Recherche Scientifique (CNRS) 7278, Institut de Recherche pour le Développement (IRD) 198 (Dakar), Institut National de la Santé et de la Recherche Médicale (INSERM) 1095, Aix-Marseille University, Marseille, France
| | - L Almeras
- Unité de Recherche en Maladies Infectieuses et Tropicales Emergentes (URMITE), UM63, Centre National de la Recherche Scientifique (CNRS) 7278, Institut de Recherche pour le Développement (IRD) 198 (Dakar), Institut National de la Santé et de la Recherche Médicale (INSERM) 1095, Aix-Marseille University, Marseille, France
| | - P Parola
- Unité de Recherche en Maladies Infectieuses et Tropicales Emergentes (URMITE), UM63, Centre National de la Recherche Scientifique (CNRS) 7278, Institut de Recherche pour le Développement (IRD) 198 (Dakar), Institut National de la Santé et de la Recherche Médicale (INSERM) 1095, Aix-Marseille University, Marseille, France
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Tahir D, Davoust B, Varloud M, Berenger JM, Raoult D, Almeras L, Parola P. Assessment of the anti-feeding and insecticidal effects of the combination of dinotefuran, permethrin and pyriproxyfen (Vectra® 3D) against Triatoma infestans on rats. Int J Infect Dis 2016. [DOI: 10.1016/j.ijid.2016.11.372] [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: 10/20/2022] Open
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Fontaine A, Pascual A, Diouf I, Bakkali N, Bourdon S, Fusai T, Rogier C, Almeras L. Mosquito salivary gland protein preservation in the field for immunological and biochemical analysis. Parasit Vectors 2011; 4:33. [PMID: 21385450 PMCID: PMC3068118 DOI: 10.1186/1756-3305-4-33] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Accepted: 03/08/2011] [Indexed: 12/17/2022] Open
Abstract
Mosquito salivary proteins are involved in several biological processes that facilitate their blood feeding and have also been reported to elicit an IgG response in vertebrates. A growing number of studies have focused on this immunological response for its potential use as a biological marker of exposure to arthropod bites. As mosquito saliva collection is extremely laborious and inefficient, most research groups prefer to work on mosquito salivary glands (SGs). Thus, SG protein integrity is a critical factor in obtaining meaningful data from immunological and biochemical analysis. Current methodologies rely on an immediate freezing of SGs after their collection. However, the maintenance of samples in a frozen environment can be hard to achieve in field conditions. In this study, SG proteins from two mosquito species (Aedes aegypti and Anopheles gambiae s.s.) stored in different media for 5 days at either +4°C or room temperature (RT) were evaluated at the quantitative (i.e., ELISA) and qualitative (i.e., SDS-PAGE and immunoblotting) levels. Our results indicated that PBS medium supplemented with an anti-protease cocktail seems to be the best buffer to preserve SG antigens for 5 days at +4°C for ELISA analysis. Conversely, cell-lysis buffer (Urea-Thiourea-CHAPS-Tris) was best at preventing protein degradation both at +4°C and RT for further qualitative analysis. These convenient storage methods provide an alternative to freezing and are expected to be applicable to other biological samples collected in the field.
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Affiliation(s)
- A Fontaine
- Unité de Recherche en Biologie et Épidémiologie Parasitaires-UMR6236-IFR48, Antenne Marseille de l'Institut de Recherche Biomédicale des Armées, Le Pharo, BP 60109, 13 262 Marseille Cedex 07, France
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Almeras L, Orlandi-Pradines E, Fontaine A, Villard C, Boucomont E, de Senneville LD, Baragatti M, Pascual A, Pradines B, Corre-Catelin N, Pages F, Reiter P, Rogier C, Fusai T. Sialome Individuality BetweenAedes aegyptiColonies. Vector Borne Zoonotic Dis 2009; 9:531-41. [DOI: 10.1089/vbz.2008.0056] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- L. Almeras
- Unité de recherche en biologie et en épidémiologie parasitaire, Institut de Médecine Tropicale du Service de Santé des Armées (IMTSSA): Marseille-Armées, France
| | - E. Orlandi-Pradines
- Unité de recherche en biologie et en épidémiologie parasitaire, Institut de Médecine Tropicale du Service de Santé des Armées (IMTSSA): Marseille-Armées, France
| | - A. Fontaine
- Unité de recherche en biologie et en épidémiologie parasitaire, Institut de Médecine Tropicale du Service de Santé des Armées (IMTSSA): Marseille-Armées, France
| | - C. Villard
- Plateau Proteomique Timone, Université Aix-Marseille II; Marseille, France
| | - E. Boucomont
- Unité de recherche en biologie et en épidémiologie parasitaire, Institut de Médecine Tropicale du Service de Santé des Armées (IMTSSA): Marseille-Armées, France
| | - L. Denis de Senneville
- Unité de recherche en biologie et en épidémiologie parasitaire, Institut de Médecine Tropicale du Service de Santé des Armées (IMTSSA): Marseille-Armées, France
| | - M. Baragatti
- Unité de recherche en biologie et en épidémiologie parasitaire, Institut de Médecine Tropicale du Service de Santé des Armées (IMTSSA): Marseille-Armées, France
| | - A. Pascual
- Unité de recherche en biologie et en épidémiologie parasitaire, Institut de Médecine Tropicale du Service de Santé des Armées (IMTSSA): Marseille-Armées, France
| | - B. Pradines
- Unité de recherche en biologie et en épidémiologie parasitaire, Institut de Médecine Tropicale du Service de Santé des Armées (IMTSSA): Marseille-Armées, France
| | - N. Corre-Catelin
- Institut Pasteur, Insects and Infectious Diseases Unit; Paris, France
| | - F. Pages
- Unité d'Entomologie Médicale, Institut de Médecine Tropicale du Service de Santé des Armées (IMTSSA); Marseille-Armées, France
| | - P. Reiter
- Institut Pasteur, Insects and Infectious Diseases Unit; Paris, France
| | - C. Rogier
- Unité de recherche en biologie et en épidémiologie parasitaire, Institut de Médecine Tropicale du Service de Santé des Armées (IMTSSA): Marseille-Armées, France
| | - T. Fusai
- Unité de recherche en biologie et en épidémiologie parasitaire, Institut de Médecine Tropicale du Service de Santé des Armées (IMTSSA): Marseille-Armées, France
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Almeras L, Briolant S, Orlandi-Pradines E, Fontaine A, Henry M, Bogreau H, Pradines B, Rogier C, Fusai T. [Proteomic analysis and parasitosis: principles and applications]. Med Trop (Mars) 2007; 67:188-96. [PMID: 17691442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
O'Farrel described a method allowing two-dimensional (2D) protein separation more than 30 years ago. Since then the original technique has made enormous progress. This progress has been accompanied by advances in mass spectrometry technology as well as various genome-sequencing programs. Today 2D electrophoresis has become the workhorse of proteomics, allowing resolution of complex structures containing thousands of proteins and providing a global view of the state of a proteome. This article presents the different steps and limitations of proteomic analysis: preparation of biological material, 2D electrophoresis, protein detection systems, and available tools for protein identification. Alternative proteomic approaches to 2D electrophoresis are also presented. A few applications are described as examples to illustrate the utility of proteomic analysis for studying the mechanisms underlying virulence, resistance to antimalarial therapies and immune response against pathologic agents.
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Affiliation(s)
- L Almeras
- L'Unite de Recherche en Biologie et Epidimiologie Parasitaires de l'Institut de Médecine Tropicale du Service de Santé des Armées de Marseille
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Eyles D, Almeras L, Benech P, Patatian A, Mackay-Sim A, McGrath J, Féron F. Developmental vitamin D deficiency alters the expression of genes encoding mitochondrial, cytoskeletal and synaptic proteins in the adult rat brain. J Steroid Biochem Mol Biol 2007; 103:538-45. [PMID: 17293106 DOI: 10.1016/j.jsbmb.2006.12.096] [Citation(s) in RCA: 126] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Epidemiology has highlighted the links between season of birth, latitude and the prevalence of brain disorders such as multiple sclerosis and schizophrenia. In line with these data, we have hypothesized that "imprinting" with low prenatal vitamin D could contribute to the risk of these two brain disorders. Previously, we have shown that transient developmental hypovitaminosis D induces permanent changes in adult nervous system. The aim of this study was to examine the impact of prenatal hypovitaminosis D on gene expression in the adult rat brain. Vitamin D deficient female rats were mated with undeprived males and the offspring were fed with a control diet after birth. At Week 10, gene expression in the progeny's brain was compared with control animals using Affymetrix gene microarrays. Prenatal hypovitaminosis D causes a dramatic dysregulation of several biological pathways including oxidative phosphorylation, redox balance, cytoskeleton maintenance, calcium homeostasis, chaperoning, post-translational modifications, synaptic plasticity and neurotransmission. A computational analysis of these data suggests that impaired synaptic network may be a consequence of mitochondrial dysfunction. Since disruptions of mitochondrial metabolism have been associated with both multiple sclerosis and schizophrenia, developmental vitamin D deficiency may be a heuristic animal model for the study of these two brain diseases.
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Affiliation(s)
- D Eyles
- Queensland Centre for Mental Health Research, The Park Centre for Mental Health, Wacol, QLD 4076, Australia
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Briolant S, Almeras L, Fusai T, Rogier C, Pradines B. [Cyclines and malaria]. Med Trop (Mars) 2007; 67:86-96. [PMID: 17506281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The emergence and rapid spread of Plasmodium falciparum resistance to various antimalarials compounds is gradually reducing the clinician's options for treating malaria and for adapting prophylaxis to each traveler and destination. In this context doxycycline is an increasingly useful alternative except in individuals with contraindications, mainly children under the age of eight and pregnant women. Already used successfully in association with quinine for treatment of malaria in areas with multiresistance, doxycline has also proven to be effective and well tolerated for prophylaxis of malaria. No resistance to doxycycline has been observed to date. Most reported prophylactic failures have been related to poor compliance during the month following return from the endemic zone. The mechanisms of action of doxycycline on the parasite are still unclear. Identification of the molecular targets of doxycycline would open the way for the design of more active structural analogues with longer half-life.
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Affiliation(s)
- S Briolant
- Unité de Recherche en Biologie et Epidémiologie Parasitaires, Institut de Médecine Tropicale du Service de Santé des Armées, Bd Charles Livon, BP 46, Le Pharo, 13998 Marseille Armies, France
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Rogier C, Orlandi-Pradines E, Fusaï T, Pradines B, Briolant S, Almeras L. [Malaria vaccines: prospects and reality]. Med Mal Infect 2006; 36:414-22. [PMID: 16949781 DOI: 10.1016/j.medmal.2006.05.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2006] [Accepted: 05/19/2006] [Indexed: 11/15/2022]
Abstract
The development of a malaria vaccine has been accelerating in the last ten years. The number of clinical trials has increased and some malaria antigens have been tested in endemic areas. No potential vaccine has yet shown sufficient and lasting efficacy to justify its inclusion in a public health program. However, trials have unambiguously shown that some level of anti-malaria clinical immunity can be achieved by vaccination, both in experimental and in field conditions. Advances in malaria vaccine development are presented.
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Affiliation(s)
- C Rogier
- Unité de recherche en biologie et épidémiologie parasitaires, institut de médecine tropicale du service de santé des armées, Le Pharo, BP 46, 13998 Marseille-Armées, France.
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11
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Dubucquoi S, de Seze J, Lefranc D, Almeras L, Dutoit V, Prin L, Vermersch P. Interferon beta in multiple sclerosis: relationship between sustained serum IgG levels and clinical outcome. J Neuroimmunol 2002; 129:232. [PMID: 12161040 DOI: 10.1016/s0165-5728(02)00204-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
We investigated the effects of interferon beta-1a (IFN beta-1a) on specific response towards two immunodominant MBP peptides and on global production of IgG. We evaluated 54 sera from multiple sclerosis (MS) patients at baseline and 1 year after treatment. We did not observe any modification of immune response to the MBP peptides but we noted a significant decrease in mean IgG concentrations in patients with progression of the disease but not in stable patients. These results suggest that IFN beta1a restores or maintains a beneficial immune response.
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Affiliation(s)
- S Dubucquoi
- Department of Immunology, CHRU of LILLE, 1 place de Verdun, 59045 cedex, Lille, France.
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Lefranc D, Dubucquoi S, Almeras L, De Seze J, Tourvieille B, Dussart P, Aubert JP, Vermersch P, Prin L. Molecular analysis of endogenous retrovirus HRES-1: identification of frameshift mutations in region encoding putative 28-kDa autoantigen. Biochem Biophys Res Commun 2001; 283:437-44. [PMID: 11327721 DOI: 10.1006/bbrc.2001.4814] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A possible involvement of HTLV-1-related endogenous sequence 1 (HRES-1) in autoimmune diseases has been recently reported. In primate cells, PCRs and RT-PCRs using specific primers reveal the presence and the transcription of gag-related sequences. However antisera generated against selected HRES-1 peptides failed to detect a 28-kDa protein deduced from the translated gag ORF and described previously. Such discordant results led us to perform DNA cloning and sequencing of LTR- and gag-related nucleotidic fragments. Repeated sequence analyses on distinct samples revealed frameshift mutations in the gag and LTR ORFs. Our sequence analyses detected a stop codon in the gag-related ORF, which is inconsistent with the expression of a 28-kDa protein. Instead of the two ORFs previously found, our gag-related region contained three ORFs. One of them demonstrated higher nucleotidic and peptidic homologies with the p19 gag of HTLV-I. However, the molecular analyses of our new sequence did not show evidence of potent translation capacities.
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Affiliation(s)
- D Lefranc
- Department of Immunology-EA2686, Pôle Recherche, Place de Verdun, Lille Cedex, 59045, France.
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