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Vincent M, Boubakri H, Gasser M, Hay AE, Herrera-Belaroussi A. What contribution of plant immune responses in Alnus glutinosa-Frankia symbiotic interactions? Symbiosis 2023. [DOI: 10.1007/s13199-022-00889-2] [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: 01/25/2023]
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Guégan M, Martin E, Tran Van V, Fel B, Hay AE, Simon L, Butin N, Bellvert F, Haichar FEZ, Valiente Moro C. Mosquito sex and mycobiota contribute to fructose metabolism in the Asian tiger mosquito Aedes albopictus. Microbiome 2022; 10:138. [PMID: 36038937 PMCID: PMC9425969 DOI: 10.1186/s40168-022-01325-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 12/23/2021] [Accepted: 07/11/2022] [Indexed: 05/31/2023]
Abstract
BACKGROUND Plant floral nectars contain natural sugars such as fructose, which are a primary energy resource for adult mosquitoes. Despite the importance of carbohydrates for mosquito metabolism, a limited knowledge is available about the pathways involved in sugar assimilation by mosquitoes and their associated microbiota. To this end, we used 13C-metabolomic and stable isotope probing approaches coupled to high-throughput sequencing to reveal fructose-related mosquito metabolic pathways and the dynamics of the active gut microbiota following fructose ingestion. RESULTS Our results revealed significant differences in metabolic pathways between males and females, highlighting different modes of central carbon metabolism regulation. Competitive and synergistic interactions of diverse fungal taxa were identified within the active mycobiota following fructose ingestion. In addition, we identified potential cross-feeding interactions between this. Interestingly, there is a strong correlation between several active fungal taxa and the presence of fructose-derived metabolites. CONCLUSIONS Altogether, our results provide novel insights into mosquito carbohydrate metabolism and demonstrate that dietary fructose as it relates to mosquito sex is an important determinant of mosquito metabolism; our results also further highlight the key role of active mycobiota interactions in regulating the process of fructose assimilation in mosquitoes. This study opens new avenues for future research on mosquito-microbiota trophic interactions related to plant nectar-derived sugars. Video abstract.
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Affiliation(s)
- Morgane Guégan
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622, Villeurbanne, France
| | - Edwige Martin
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622, Villeurbanne, France
| | - Van Tran Van
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622, Villeurbanne, France
| | - Benjamin Fel
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622, Villeurbanne, France
| | - Anne-Emmanuelle Hay
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622, Villeurbanne, France
| | - Laurent Simon
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622, Villeurbanne, France
| | - Noémie Butin
- MetaboHUB-MetaToul, National Infrastructure of Metabolomics and Fluxomics, Toulouse, France
- TBI, Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France
| | - Floriant Bellvert
- MetaboHUB-MetaToul, National Infrastructure of Metabolomics and Fluxomics, Toulouse, France
- TBI, Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France
| | - Feth El Zahar Haichar
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622, Villeurbanne, France
- INSA-Lyon, Université Claude Bernard Lyon 1, CNRS, UMR5240, Microbiologie, Adaptation, Pathogénie, Université Lyon, 10 rue Raphaël Dubois, 69622, Villeurbanne, France
| | - Claire Valiente Moro
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622, Villeurbanne, France.
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Girard M, Martin E, Vallon L, Raquin V, Bellet C, Rozier Y, Desouhant E, Hay AE, Luis P, Valiente Moro C, Minard G. Microorganisms Associated with Mosquito Oviposition Sites: Implications for Habitat Selection and Insect Life Histories. Microorganisms 2021; 9:1589. [PMID: 34442667 PMCID: PMC8401263 DOI: 10.3390/microorganisms9081589] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 07/08/2021] [Accepted: 07/21/2021] [Indexed: 01/03/2023] Open
Abstract
Mosquitoes are considered one of the most important threats worldwide due to their ability to vector pathogens. They are responsible for the transmission of major pathogens such as malaria, dengue, zika, or chikungunya. Due to the lack of treatments or prophylaxis against many of the transmitted pathogens and an increasing prevalence of mosquito resistance to insecticides and drugs available, alternative strategies are now being explored. Some of these involve the use of microorganisms as promising agent to limit the fitness of mosquitoes, attract or repel them, and decrease the replication and transmission of pathogenic agents. In recent years, the importance of microorganisms colonizing the habitat of mosquitoes has particularly been investigated since they appeared to play major roles in their development and diseases transmission. In this issue, we will synthesize researches investigating how microorganisms present within water habitats may influence breeding site selection and oviposition strategies of gravid mosquito females. We will also highlight the impact of such microbes on the fate of females' progeny during their immature stages with a specific focus on egg hatching, development rate, and larvae or pupae survival.
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Affiliation(s)
- Maxime Girard
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622 Villeurbanne, France; (M.G.); (E.M.); (L.V.); (V.R.); (A.-E.H.); (P.L.); (C.V.M.)
| | - Edwige Martin
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622 Villeurbanne, France; (M.G.); (E.M.); (L.V.); (V.R.); (A.-E.H.); (P.L.); (C.V.M.)
| | - Laurent Vallon
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622 Villeurbanne, France; (M.G.); (E.M.); (L.V.); (V.R.); (A.-E.H.); (P.L.); (C.V.M.)
| | - Vincent Raquin
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622 Villeurbanne, France; (M.G.); (E.M.); (L.V.); (V.R.); (A.-E.H.); (P.L.); (C.V.M.)
| | - Christophe Bellet
- Entente Interdépartementale Rhône-Alpes pour la Démoustication, F-73310 Chindrieux, France; (C.B.); (Y.R.)
| | - Yves Rozier
- Entente Interdépartementale Rhône-Alpes pour la Démoustication, F-73310 Chindrieux, France; (C.B.); (Y.R.)
| | - Emmanuel Desouhant
- Univ. Lyon, Université Claude Bernard Lyon 1, Laboratoire de Biométrie et de Biologie Evolutive, UMR CNRS 5558, VetAgro Sup, F-69622 Villeurbanne, France;
| | - Anne-Emmanuelle Hay
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622 Villeurbanne, France; (M.G.); (E.M.); (L.V.); (V.R.); (A.-E.H.); (P.L.); (C.V.M.)
| | - Patricia Luis
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622 Villeurbanne, France; (M.G.); (E.M.); (L.V.); (V.R.); (A.-E.H.); (P.L.); (C.V.M.)
| | - Claire Valiente Moro
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622 Villeurbanne, France; (M.G.); (E.M.); (L.V.); (V.R.); (A.-E.H.); (P.L.); (C.V.M.)
| | - Guillaume Minard
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622 Villeurbanne, France; (M.G.); (E.M.); (L.V.); (V.R.); (A.-E.H.); (P.L.); (C.V.M.)
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Zaabat N, Hay AE, Michalet S, Skandrani I, Chekir-Ghedira L, Dijoux-Franca MG, Akkal S. Chemical Composition, Antioxidant, Genotoxique and Antigenotoxic Potentials of Phlomis Bovei De Noé Aerial Parts. Iran J Pharm Res 2020; 19:282-291. [PMID: 32922487 PMCID: PMC7462515 DOI: 10.22037/ijpr.2019.15197.12938] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In the present work, chemical investigation of the aerial parts of Phlomisbovei de Noé an endemic species from Algeria, led to the isolation and identification of seven known compounds including five flavones glycosides: Chrysoeriol 7-O-(3’’-(E et Z)-p-coumaroyl)-β-glucoside (1), terniflorin (apigenin-7-O-(6’’-E-p-coumaroyl)glucoside) (3), apigenin-7-O-(6’’-(5’’’-methoxy-coumaryl) glucoside (4), apigenin 7-O-(3″-p-coumaryl)glucoside(5), hispidulin-7-O-glucuronide (6) and two cinnamic acid derivatives: p-coumaric acid methyl ester (E et Z) (2), chlorogenic acid (7). Compound 4 is described for the first time in the species bovei de Noé, the genus Phlomis and the Lamiaceae family. Structures elucidation was performed by comprehensive 1D and 2D NMR analyses, mass spectrometry and by comparison with literature data. Some pure compounds and extracts have been evaluated for their antioxidant activities through different methods: DPPH and ABTS assays as well as CUPRAC assay. Genotoxic and antigenotoxic activities of pure compounds were also evaluated in-vitro on Escherichia coli PQ37 cells by the SOS Chromotest.
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Affiliation(s)
- Nabila Zaabat
- UMR 5557 CNRS-UCBL - Ecologie Microbienne, Université Lyon 1, Villeurbanne, France.,Département de Chimie, Laboratoire de Recherche en Phytochimie et Analyse Physicochimique, Université Mentouri, Constantine, Algeria
| | - Anne-Emmanuelle Hay
- UMR 5557 CNRS-UCBL - Ecologie Microbienne, Université Lyon 1, Villeurbanne, France
| | - Serge Michalet
- UMR 5557 CNRS-UCBL - Ecologie Microbienne, Université Lyon 1, Villeurbanne, France
| | - Inès Skandrani
- Laboratoire de Biologie Moléculaire et Cellulaire, Faculté de Médecine Dentaire de Monastir, Tunisia
| | - Leila Chekir-Ghedira
- Laboratoire de Biologie Moléculaire et Cellulaire, Faculté de Médecine Dentaire de Monastir, Tunisia
| | | | - Salah Akkal
- Département de Chimie, Laboratoire de Recherche en Phytochimie et Analyse Physicochimique, Université Mentouri, Constantine, Algeria
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Hay AE, Herrera-Belaroussi A, Rey M, Fournier P, Normand P, Boubakri H. Feedback Regulation of N Fixation in Frankia-Alnus Symbiosis Through Amino Acids Profiling in Field and Greenhouse Nodules. Mol Plant Microbe Interact 2020; 33:499-508. [PMID: 31916486 DOI: 10.1094/mpmi-10-19-0289-r] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Symbiosis established between actinorhizal plants and Frankia spp., which are nitrogen-fixing actinobacteria, promotes nodule organogenesis, the site of metabolic exchange. The present study aimed to identify amino acid markers involved in Frankia-Alnus interactions by comparing nodules and associated roots from field and greenhouse samples. Our results revealed a high level of citrulline in all samples, followed by arginine (Arg), aspartate (Asp), glutamate (Glu), γ-amino-n-butyric acid (GABA), and alanine (Ala). Interestingly, the field metabolome approach highlighted more contrasted amino acid patterns between nodules and roots compared with greenhouse samples. Indeed, 12 amino acids had a mean relative abundance significantly different between field nodule and root samples, against only four amino acids in greenhouse samples, underlining the importance of developing "ecometabolome" approaches. In order to monitor the effects on Frankia cells (respiration and nitrogen fixation activities) of amino acid with an abundance pattern evocative of a role in symbiosis, in-vitro assays were performed by supplementing them in nitrogen-free cultures. Amino acids had three types of effects: i) those used by Frankia as nitrogen source (Glu, Gln, Asp), ii) amino acids stimulating both nitrogen fixation and respiration (e.g., Cit, GABA, Ala, valine, Asn), and iii) amino acids triggering a toxic effect (Arg, histidine). In this paper, a N-metabolic model was proposed to discuss how the host plant and bacteria modulate amino acids contents in nodules, leading to a fine regulation sustaining high bacterial nitrogen fixation.
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Affiliation(s)
- Anne-Emmanuelle Hay
- Université de Lyon, F-69361, Lyon, France, Université Claude Bernard Lyon 1, CNRS, UMR 5557, INRA UMR1418, Ecologie Microbienne, F-69622, Villeurbanne, France
- Université Claude Bernard Lyon 1, CNRS, UMR 5557, INRA UMR1418, Ecologie Microbienne, Centre d'Etude des Substances Naturelles
| | - Aude Herrera-Belaroussi
- Université de Lyon, F-69361, Lyon, France, Université Claude Bernard Lyon 1, CNRS, UMR 5557, INRA UMR1418, Ecologie Microbienne, F-69622, Villeurbanne, France
| | - Marjolaine Rey
- Université de Lyon, F-69361, Lyon, France, Université Claude Bernard Lyon 1, CNRS, UMR 5557, INRA UMR1418, Ecologie Microbienne, F-69622, Villeurbanne, France
- Université Claude Bernard Lyon 1, CNRS, UMR 5557, INRA UMR1418, Ecologie Microbienne, Centre d'Etude des Substances Naturelles
| | - Pascale Fournier
- Université de Lyon, F-69361, Lyon, France, Université Claude Bernard Lyon 1, CNRS, UMR 5557, INRA UMR1418, Ecologie Microbienne, F-69622, Villeurbanne, France
| | - Philippe Normand
- Université de Lyon, F-69361, Lyon, France, Université Claude Bernard Lyon 1, CNRS, UMR 5557, INRA UMR1418, Ecologie Microbienne, F-69622, Villeurbanne, France
| | - Hasna Boubakri
- Université de Lyon, F-69361, Lyon, France, Université Claude Bernard Lyon 1, CNRS, UMR 5557, INRA UMR1418, Ecologie Microbienne, F-69622, Villeurbanne, France
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Guégan M, Tran Van V, Martin E, Minard G, Tran FH, Fel B, Hay AE, Simon L, Barakat M, Potier P, Haichar FEZ, Valiente Moro C. Who is eating fructose within the Aedes albopictus gut microbiota? Environ Microbiol 2020; 22:1193-1206. [PMID: 31943686 DOI: 10.1111/1462-2920.14915] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 12/20/2019] [Accepted: 01/08/2020] [Indexed: 12/18/2022]
Abstract
The Asian tiger mosquito Aedes albopictus is a major public health concern because of its invasive success and its ability to transmit pathogens. Given the low availability of treatments against mosquito-borne diseases, vector control remains the most suitable strategy. The methods used thus far are becoming less effective, but recent strategies have emerged from the study of mosquito-associated microorganisms. Although the role of the microbiota in insect biology does not require further proof, much remains to be deciphered in mosquitoes, especially the contribution of the microbiota to host nutrient metabolism. Mosquitoes feed on plant nectar, composed of mostly fructose. We used stable isotope probing to identify bacteria and fungi assimilating fructose within the gut of Ae. albopictus. Mosquitoes were fed a 13 C-labelled fructose solution for 24 h. Differences in the active microbial community according to the sex of mosquitoes were highlighted. The bacterium Lelliottia and the fungi Cladosporium and Aspergillus dominated the active microbiota in males, whereas the bacterium Ampullimonas and the yeast Cyberlindnera were the most active in females. This study is the first to investigate trophic interactions between Ae. albopictus and its microbiota, thus underscoring the importance of the microbial component in nectar feeding in mosquitoes.
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Affiliation(s)
- Morgane Guégan
- Laboratoire d'Ecologie Microbienne, UMR CNRS 5557, Univ Lyon, Université Claude Bernard Lyon 1, UMR INRA, 1418, Villeurbanne, France
| | - Van Tran Van
- Laboratoire d'Ecologie Microbienne, UMR CNRS 5557, Univ Lyon, Université Claude Bernard Lyon 1, UMR INRA, 1418, Villeurbanne, France
| | - Edwige Martin
- Laboratoire d'Ecologie Microbienne, UMR CNRS 5557, Univ Lyon, Université Claude Bernard Lyon 1, UMR INRA, 1418, Villeurbanne, France
| | - Guillaume Minard
- Laboratoire d'Ecologie Microbienne, UMR CNRS 5557, Univ Lyon, Université Claude Bernard Lyon 1, UMR INRA, 1418, Villeurbanne, France
| | - Florence-Hélène Tran
- Laboratoire d'Ecologie Microbienne, UMR CNRS 5557, Univ Lyon, Université Claude Bernard Lyon 1, UMR INRA, 1418, Villeurbanne, France
| | - Benjamin Fel
- Laboratoire d'Ecologie Microbienne, UMR CNRS 5557, Univ Lyon, Université Claude Bernard Lyon 1, UMR INRA, 1418, Villeurbanne, France.,Université de Lyon, Université Lyon 1, CNRS, UMR 5557, Ecologie Microbienne, CESN Centre d'Etude des Substances Naturelles, 43 Bd du 11 novembre 1918, 69622, Villeurbanne Cedex, France
| | - Anne-Emmanuelle Hay
- Laboratoire d'Ecologie Microbienne, UMR CNRS 5557, Univ Lyon, Université Claude Bernard Lyon 1, UMR INRA, 1418, Villeurbanne, France.,Université de Lyon, Université Lyon 1, CNRS, UMR 5557, Ecologie Microbienne, CESN Centre d'Etude des Substances Naturelles, 43 Bd du 11 novembre 1918, 69622, Villeurbanne Cedex, France
| | - Laurent Simon
- UMR 5023 LEHNA, CNRS, Univ Lyon, Université Claude Bernard Lyon 1, Université Lyon 1, ENTPE, Villeurbanne, France
| | - Mohamed Barakat
- Laboratory for Microbial Ecology of the Rhizosphere and Extreme Environment, CNRS, UMR 7265 BIAM, CEA, Aix Marseille University, Saint-Paul-lès-Durance, France
| | - Patrick Potier
- Laboratoire d'Ecologie Microbienne, UMR CNRS 5557, Univ Lyon, Université Claude Bernard Lyon 1, UMR INRA, 1418, Villeurbanne, France
| | - Feth El Zahar Haichar
- Laboratoire d'Ecologie Microbienne, UMR CNRS 5557, Univ Lyon, Université Claude Bernard Lyon 1, UMR INRA, 1418, Villeurbanne, France
| | - Claire Valiente Moro
- Laboratoire d'Ecologie Microbienne, UMR CNRS 5557, Univ Lyon, Université Claude Bernard Lyon 1, UMR INRA, 1418, Villeurbanne, France
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Cheung WY, Kornelsen EA, Mittmann N, Leighl NB, Cheung M, Chan KK, Bradbury PA, Ng RCH, Chen BE, Ding K, Pater JL, Tu D, Hay AE. The economic impact of the transition from branded to generic oncology drugs. ACTA ACUST UNITED AC 2019; 26:89-93. [PMID: 31043808 DOI: 10.3747/co.26.4395] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background Economic evaluations are an integral component of many clinical trials. Costs used in those analyses are based on the prices of branded drugs when they first enter the market. The effect of genericization on the cost-effectiveness (ce) or cost-utility (cu) of an intervention is unknown because economic analyses are rarely updated using the costs of generic drugs. Methods We re-examined the ce or cu of regimens previously evaluated in Canadian Cancer Trials Group (cctg) studies that included prospective economic evaluations and where genericization has occurred or is anticipated in Canada. We incorporated the new costs of generic drugs to characterize changes in ce or cu. We also determined acceptable cost levels of generic drugs that would make regimens reimbursable in a publicly funded health care system. Results The four randomized controlled trials included (representing 1979 patients) were cctg br.10 (early lung cancer, adjuvant vinorelbine-cisplatin vs. observation, n = 172), cctg br.21 (metastatic lung cancer, erlotinib vs. placebo, n = 731), cctg co.17 (metastatic colon cancer, cetuximab vs. best supportive care, n = 557), and cctg ly.12 (relapsed or refractory lymphoma, gemcitabine-dexamethasone-cisplatin vs. cytarabine-dexamethasone-cisplatin, n = 619). Since the initial publication of those trials, the genericization of vinorelbine, erlotinib, cetuximab, and cisplatin has taken place or is expected in Canada. Costs of generics improved the ces and cus of treatment significantly. For example, genericization of erlotinib ($1460.25 per 30 days) resulted in an incremental cost-effectiveness ratio (icer) of $45,746 per life-year gained compared with $94,638 for branded erlotinib. Likewise, genericization of cetuximab ($275.80 per 100 mg) produced an icer of $261,126 per quality-adjusted life-year (qaly) gained compared with $299,613 for branded cetuximab. Decreases in the cost of generic cetuximab to $129.39 and $63.51 would further improve the icer to $150,000 and $100,000 per QALY respectively. Conclusions Genericization of a costly oncology drug can modify the ce and cu of a regimen significantly. Failure to revisit economic analyses with the costs of generics could be a missed opportunity for funding bodies to optimize value-based allocation of health care resources. At current levels, the costs of generics might not be sufficiently low to sustain publicly funded health care systems.
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Affiliation(s)
| | | | | | | | - M Cheung
- University of Toronto, Toronto, ON
| | - K K Chan
- University of Toronto, Toronto, ON
| | | | - R C H Ng
- University of Toronto, Toronto, ON
| | - B E Chen
- Queen's University, Kingston, ON
| | - K Ding
- Queen's University, Kingston, ON
| | | | - D Tu
- Queen's University, Kingston, ON
| | - A E Hay
- Queen's University, Kingston, ON
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Davison K, Chen BE, Kukreti V, Couban S, Benger A, Berinstein NL, Kaizer L, Desjardins P, Mangel J, Zhu L, Djurfeldt MS, Hay AE, Shepherd LE, Crump M. Treatment outcomes for older patients with relapsed/refractory aggressive lymphoma receiving salvage chemotherapy and autologous stem cell transplantation are similar to younger patients: a subgroup analysis from the phase III CCTG LY.12 trial. Ann Oncol 2017; 28:622-627. [PMID: 27993811 DOI: 10.1093/annonc/mdw653] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Background High-dose therapy and autologous stem cell transplantation (ASCT) is often considered for older patients (age >60 years) with relapsed/refractory aggressive lymphomas. Although registry data support the safety and potential efficacy of this approach, there are no prospective trials evaluating outcomes of ASCT in older patients. We evaluated the result of second-line chemotherapy and ASCT in older versus younger patients in the CCTG randomized LY.12 trial. Patients and methods From August 2003 to November 2011, 619 patients with relapsed/refractory aggressive lymphoma were randomized to gemcitabine, dexamethasone, cisplatin (GDP) or dexamethasone, cytarabine, cisplatin (DHAP); 177 patients (28.6%) enrolled were >60.0 years of age (range, 60-74) and 442 were ≤60.0 years of age. After two to three cycles, responding patients proceeded to ASCT. Intention-to-treat analysis was used to compare response rate, transplantation rate, event-free survival (EFS) and overall survival (OS) between patients aged ≤60.0 and >60.0 years. Results Patient characteristics were comparable between the two cohorts, except a larger proportion of older patients had high International Prognostic Index risk scores. Response to salvage therapy was 48.6% for patients aged >60.0 versus 43.0% for those aged ≤60.0 (P = 0.21). Transplantation rates were also similar: 50.3% versus 49.8% (P = 0.87) for older versus younger patients. Rates of febrile neutropenia and adverse events requiring hospitalization were comparable for older and younger patients (30.5% versus 22.9% and 37.9% versus 32.1%, respectively). With a median follow-up of 53 months, there was no difference in 4-year OS (36% and 40% for patients aged >60.0 and ≤60.0 years, P = 0.42), or 4-year EFS (20% versus 28%, P = 0.43). Mortality from salvage therapy was 8/174 (4.60%) and 5/436 (1.15%), and 100-day mortality post-ASCT was 7/88 (8.06%) and 4/219 (1.85%). Conclusion This subgroup analysis suggests that older patients derive similar benefit from salvage therapy and ASCT to younger patients, with acceptable toxicity. ClinicalTrials.gov Identifier NCT00078949.
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Affiliation(s)
- K Davison
- Division of Hematology, Department of Medicine, Royal Victoria Hospital, McGill University Health Centre, Montreal, Canada
| | - B E Chen
- Canadian Cancer Trials Group, Queen's University, Kingston, Canada
| | - V Kukreti
- Department of Medical Oncology and Hematology, Princess Margaret Cancer Centre, Toronto, Canada
| | - S Couban
- Division of Hematology, Department of Medicine, Queen Elizabeth II Health Sciences Centre, Halifax, Canada
| | - A Benger
- Division of Malignant Hematology, Department of Oncology, Juravinski Cancer Centre, Hamilton, Canada
| | - N L Berinstein
- Department of Medicine, Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada
| | - L Kaizer
- Division of Oncology, Department of Medicine, Credit Valley Hospital, Mississauga, Canada
| | - P Desjardins
- Division of Hematology, Department of Medicine, Hôpital Charles LeMoyne, Longueuil, Canada
| | - J Mangel
- Division of Hematology, Department of Medicine, London Health Sciences Centre, London, Canada
| | - L Zhu
- Canadian Cancer Trials Group, Queen's University, Kingston, Canada
| | - M S Djurfeldt
- Canadian Cancer Trials Group, Queen's University, Kingston, Canada
| | - A E Hay
- Canadian Cancer Trials Group, Queen's University, Kingston, Canada
| | - L E Shepherd
- Canadian Cancer Trials Group, Queen's University, Kingston, Canada
| | - M Crump
- Department of Medical Oncology and Hematology, Princess Margaret Cancer Centre, Toronto, Canada
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Hay AE, Leung YW, Pater JL, Brown MC, Bell E, Howell D, Kassam Z, Willing S, Tian C, Liu G. Linkage of clinical trial and administrative data: a survey of cancer patient preferences. ACTA ACUST UNITED AC 2017; 24:161-167. [PMID: 28680275 DOI: 10.3747/co.24.3400] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Personal health information, including diagnoses and hospital admissions, is routinely collected in administrative databases. Patients enrolling on clinical trials consent to separate collection and storage of their personal health information. We evaluated patient preferences for linking long-term data from administrative databases with clinical trials. METHODS Adults with cancer attending outpatient clinics at 3 Ontario hospitals were surveyed about their willingness, when faced with the hypothetical scenario of participating in a clinical trial, to provide potentially identifying information such as initials and date of birth to facilitate long-term research access to normally deidentified publicly collected databases. RESULTS Of 569 patients surveyed, 335 (59%) were women, 452 (79%) were white, 385 (68%) had a post-secondary education, and 386 (68%) had never participated in a clinical trial. Median age in the group was 59 years. Most participants (93%, cohort 1) would allow long-term access to their information and allow personal information to be used to match clinical trial with administrative data. At the time of clinical trial closure, two thirds of participants (68%, cohort 2) preferred to make additional clinical information available through linkage with administrative databases, and 8 (9%) preferred to have no further information made available to researchers. No significant differences were found in the subset of patients who were part of a clinical trial and those who had never participated (p = 0.65). INTERPRETATION Almost all patients would allow a clinical trial research team to access their confidential information, providing a more comprehensive assessment of an intervention's long-term risks and benefits.
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Affiliation(s)
- A E Hay
- Canadian Cancer Trials Group and.,Department of Medicine, Queen's University, Kingston
| | - Y W Leung
- Department of Supportive Care, Princess Margaret Cancer Centre
| | | | | | - E Bell
- Clinical Trials Ontario, Toronto
| | - D Howell
- University Hospital Network, and
| | - Z Kassam
- University Hospital Network, and.,Department of Radiation Oncology, Stronach Regional Cancer Centre, Southlake Regional Health Centre, Newmarket; and
| | - S Willing
- Cancer Centre of Southeastern Ontario, Kingston General Hospital, Kingston, ON
| | - C Tian
- University Hospital Network, and
| | - G Liu
- University Hospital Network, and
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Hay AE, Rae C, Fraser GA, Meyer RM, Abbott LS, Bevan S, McBride ML, Cuvelier GDE, McKillop S, Barr RD. Accrual of adolescents and young adults with cancer to clinical trials. ACTA ACUST UNITED AC 2016; 23:e81-5. [PMID: 27122988 DOI: 10.3747/co.23.2925] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Cancer is the most common disease-related cause of death in 15- to 29-year-olds in Canada [...]
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Affiliation(s)
- A E Hay
- Canadian Cancer Trials Group and Department of Medicine, Queen's University, Kingston, ON
| | - C Rae
- McMaster University, Hamilton, ON
| | - G A Fraser
- Department of Oncology, McMaster University, and the Juravinski Hospital and Cancer Centre, Hamilton, ON
| | - R M Meyer
- Department of Oncology, McMaster University, and the Juravinski Hospital and Cancer Centre, Hamilton, ON
| | - L S Abbott
- Division of Hematology/Oncology, Department of Pediatrics, Children's Hospital of Eastern Ontario, Ottawa, ON
| | - S Bevan
- Canadian Cancer Society, Toronto, ON
| | - M L McBride
- BC Cancer Agency, University of British Columbia, Vancouver, BC
| | - G D E Cuvelier
- Department of Pediatrics and Child Health, University of Manitoba, and CancerCare Manitoba, Winnipeg, MB
| | - S McKillop
- Department of Pediatrics, Alberta Health Services, Calgary, AB
| | - R D Barr
- Department of Pediatrics, McMaster University, Hamilton, ON
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11
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Tang PA, Hay AE, O'Callaghan CJ, Mittmann N, Chambers CR, Pater JL, Leighl NB. Estimation of drug cost avoidance and pathology cost avoidance through participation in NCIC Clinical Trials Group phase III clinical trials in Canada. ACTA ACUST UNITED AC 2016; 23:S7-S13. [PMID: 26985151 DOI: 10.3747/co.23.2861] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Cost avoidance occurs when, because of provision of a drug therapy [drug cost avoidance (dca)] or a pathology test [pathology cost avoidance (pca)] during trial participation, health care payers need not pay for standard treatments or testing. The aim of our study was to estimate the total dca and pca for Canadian patients enrolled in relevant phase iii trials conducted by the ncic Clinical Trials Group. METHODS Phase iii trials that had completed accrual and resulted in dca or pca were identified. The pca was calculated based on the number of patients screened and the test cost. The dca was estimated based on patients randomized, the protocol dosing regimen, drug cost, median dose intensity, and median duration of therapy. Costs are presented in Canadian dollars. No adjustment was made for inflation. RESULTS From 1999 to 2011, 4 trials (1479 patients) resulted in pca and 17 trials (3195 patients) resulted in dca. The total pca was estimated at $4,194,849, which included testing for KRAS ($141,058), microsatellite instability ($18,600), and 21-gene recurrence score ($4,035,191). The total dca was estimated at $27,952,512, of which targeted therapy constituted 43% (five trials). The combined pca and dca was $32,147,361. CONCLUSIONS Over the study period, trials conducted by the ncic Clinical Trials Group resulted in total cost avoidance (pca and dca) of approximately $7,518 per patient. Although not all trials lead to cost avoidance, such savings should be taken account when the financial impact of conducting clinical research is being considered.
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Affiliation(s)
- P A Tang
- Tom Baker Cancer Centre, University of Calgary, Calgary, AB
| | - A E Hay
- ncic Clinical Trials Group, Kingston, ON
| | | | - N Mittmann
- ncic Clinical Trials Group, Kingston, ON;; Health Outcomes and Pharmacoeconomic (hope) Research Centre, Sunnybrook Health Sciences Centre, Toronto, ON
| | - C R Chambers
- Tom Baker Cancer Centre, University of Calgary, Calgary, AB
| | - J L Pater
- ncic Clinical Trials Group, Kingston, ON
| | - N B Leighl
- Princess Margaret Cancer Centre, Toronto, ON
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12
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Hay AE, Klimm B, Chen BE, Goergen H, Shepherd LE, Fuchs M, Gospodarowicz MK, Borchmann P, Connors JM, Markova J, Crump M, Lohri A, Winter JN, Dörken B, Pearcey RG, Diehl V, Horning SJ, Eich HT, Engert A, Meyer RM. An individual patient-data comparison of combined modality therapy and ABVD alone for patients with limited-stage Hodgkin lymphoma. Ann Oncol 2013; 24:3065-9. [PMID: 24121121 DOI: 10.1093/annonc/mdt389] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Treatment options for patients with nonbulky stage IA-IIA Hodgkin lymphoma include combined modality therapy (CMT) using doxorubicin, bleomycin, vinblastine and dacarbazine (ABVD) plus involved-field radiation therapy (IFRT), and chemotherapy with ABVD alone. There are no mature randomized data comparing ABVD with CMT using modern radiation techniques. PATIENTS AND METHODS Using German Hodgkin Study Group HD10/HD11 and NCIC Clinical Trials Group HD.6 databases, we identified 588 patients who met mutually inclusive eligibility criteria from the preferred arms of HD10 or 11 (n = 406) and HD.6 (n = 182). We evaluated time to progression (TTP), progression-free (PFS) and overall survival, including in three predefined exploratory subset analyses. RESULTS With median follow-up of 91 (HD10/11) and 134 (HD.6) months, respective 8-year outcomes were for TTP, 93% versus 87% [hazard ratio (HR) 0.44, 95% confidence interval (CI) 0.24-0.78]; for PFS, 89% versus 86% (HR 0.71, 95% CI 0.42-1.18) and for overall survival, 95% versus 95% (HR 1.09, 95% CI 0.49-2.40). In the exploratory subset analysis including HD10 eligible patients who achieved complete response (CR) or unconfirmed complete response (CRu) after two cycles of ABVD, 8-year PFS was 87% (HD10) versus 95% (HD.6) (HR 2.8; 95% CI 0.64-12.5) and overall survival 96% versus 100%. In contrast, among those without CR/CRu after two cycles of ABVD, 8-year PFS was 88% versus 74% (HR 0.35; 95% CI 0.16-0.79) and overall survival 95% versus 91%, respectively (HR 0.42; 95% CI 0.12-1.44). CONCLUSIONS In patients with nonbulky stage IA-IIA Hodgkin lymphoma, CMT provides better disease control than ABVD alone, especially among those not achieving complete response after two cycles of ABVD. Within the follow-up duration evaluated, overall survivals were similar. Longer follow-up is required to understand the implications of radiation and chemotherapy-related late effects. CLINICAL TRIALS The trials included in this analysis were registered at ClinicalTrials.gov: HD10 - NCT00265018, HD11 - NCT00264953, HD.6 - NCT00002561.
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Affiliation(s)
- A E Hay
- NCIC Clinical Trials Group and Queen's University, Kingston, Ontario, Canada
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13
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Kacem N, Hay AE, Marston A, Zellagui A, Rhouati S, Hostettmann K. Antioxidant compounds from Algerian Convolvulus tricolor (Convolvulaceae) seed husks. Nat Prod Commun 2012; 7:873-874. [PMID: 22908568] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023] Open
Abstract
Seed husk extracts of Convolvulus tricolor L. (Convolvulaceae) afforded six compounds, identified for the first time from this plant: isorhamnetin 3-O-beta-D-galactopyranoside (1), isorhamnetin 3-O-beta-D-(6"-acetyl)-galactopyranoside (2), isorhamnetin 3-O-robinobioside (3), 3,4-di-O-caffeoylquinic acid (4), gentisic acid 5-O-glucoside (5), and scopoletin (6). Separation of compounds was carried out by CC and CPC. Structural elucidations were performed by HPLC-UV-DAD, HPLC-ESI/MS (negative mode) and NMR.
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Affiliation(s)
- Nassira Kacem
- Department of Chemistry, Faculty of Sciences, University Mentouri-Constantine, Algeria.
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Pujic P, Fournier P, Alloisio N, Hay AE, Maréchal J, Anchisi S, Normand P. Lectin genes in the Frankia alni genome. Arch Microbiol 2011; 194:47-56. [PMID: 22159868 DOI: 10.1007/s00203-011-0770-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2011] [Revised: 11/07/2011] [Accepted: 11/07/2011] [Indexed: 10/14/2022]
Abstract
Frankia alni strain ACN14a's genome was scanned for the presence of determinants involved in interactions with its host plant, Alnus spp. One such determinant type is lectin, proteins that bind specifically to sugar motifs. The genome of F. alni was found to contain 7 such lectin-coding genes, five of which were of the ricinB-type. The proteins coded by these genes contain either only the lectin domain, or also a heat shock protein or a serine-threonine kinase domain upstream. These lectins were found to have several homologs in Streptomyces spp., and a few in other bacterial genomes among which none in Frankia EAN1pec and CcI3 and two in strain EUN1f. One of these F. alni genes, FRAAL0616, was cloned in E. coli, fused with a reporter gene yielding a fusion protein that was found to bind to both root hairs and to bacterial hyphae. This protein was also found to modify the dynamics of nodule formation in A. glutinosa, resulting in a higher number of nodules per root. Its role could thus be to permit binding of microbial cells to root hairs and help symbiosis to occur under conditions of low Frankia cell counts such as in pioneer situations.
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Affiliation(s)
- Petar Pujic
- Ecologie Microbienne, UMR5557 CNRS, Universite Lyon, Universite Lyon1, 16 rue Dubois, 69622 Villeurbanne cedex, France.
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15
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Zaabat N, Hay AE, Michalet S, Darbour N, Bayet C, Skandrani I, Chekir-Ghedira L, Akkal S, Dijoux-Franca MG. Antioxidant and antigenotoxic properties of compounds isolated from Marrubium deserti de Noé. Food Chem Toxicol 2011; 49:3328-35. [PMID: 21924316 DOI: 10.1016/j.fct.2011.08.026] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Revised: 08/24/2011] [Accepted: 08/31/2011] [Indexed: 10/17/2022]
Abstract
In our continual course toward the valorization of traditionally used endemic flora through the analysis of its chemobiodiversity, the phytochemical analysis of aerial parts of Marrubium deserti de Noé was undertaken. Dichloromethane and methanol extracts led to the isolation of terpenoid derivatives among which two were new labdane diterpenes named marrulibacetal A and desertine, respectively. Six of them were known compounds (a mixture of the isomers cyllenin A and 15-epi-cyllenin A, marrubiin, marrulactone, marrulibacetal and β-stigmasterol) and seven known phenolic compounds were also isolated: apigenin and several 7-O-substituted derivatives (apigenin-7-O-β-neohesperidoside, apigenin-7-O-glucoside, terniflorin and apigenin-7-O-glucuronide) together with two phenylethanoid glucosides (acteoside and forsythoside B). The structures and relative configurations of the new compounds were elucidated by MS and a series of 1D and 2D NMR analyses. Some pure compounds have been evaluated for their antioxidant activities through different methods: DPPH and ABTS assays as well as CUPRAC assay. Genotoxic and antigenotoxic activities of extracts and pure compounds were also evaluated in vitro on Escherichia coli PQ37 cells by the SOS Chromotest. Some of the isolated compounds like phenylethanoid derivatives showed stronger antioxidant capacity than trolox and were also able to significantly inhibit β-galactosidase induction caused by the mutagen agent nitrofurantoin.
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Affiliation(s)
- Nabila Zaabat
- UMR 5557 CNRS-UCBL - Ecologie Microbienne, Equipes 6/1/5, CESN, ISPB, 8 Avenue Rockefeller, F69373 Lyon cedex, France
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16
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Abstract
The actinorhizal symbiosis is a major contributor to the global nitrogen budget, playing a dominant role in ecological successions following disturbances. The mechanisms involved are still poorly known but there emerges the vision that on the plant side, the kinases that transmit the symbiotic signal are conserved with those involved in the transmission of the Rhizobium Nod signal in legumes. However, on the microbial side, complementation with Frankia DNA of Rhizobium nod mutants failed to permit identification of symbiotic genes. Furthermore, analysis of three Frankia genomes failed to permit identification of canonical nod genes and revealed symbiosis-associated genes such as nif, hup, suf and shc to be spread around the genomes. The present review explores some recently published approaches aimed at identifying bacterial symbiotic determinants.
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Affiliation(s)
- Ken-Ichi Kucho
- Department of Chemistry and Bioscience, Graduate School of Science and Engineering, Kagoshima UniversityKorimoto1–21–35, Kagoshima 890–0065, Japan
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17
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Wang XL, Hay AE, Matheeussen A, Gupta MP, Hostettmann K. Structure elucidation and NMR assignments of two new triterpenoids from the stems of Paragonia pyramidata (Bignoniaceae). Magn Reson Chem 2011; 49:184-189. [PMID: 21391240 DOI: 10.1002/mrc.2726] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2010] [Revised: 12/04/2010] [Accepted: 12/07/2010] [Indexed: 05/30/2023]
Abstract
Phytochemical investigation of dichloromethane (DCM) extract from the stems of Paragonia pyramidata var. pyramidata L. Rich. (Bur.) resulted in the isolation and characterization of two new triterpenoids 3β,19β-dihydroxylup-12, 20(29)-diene-28-oic acid (1) and 3β,19β-dihydroxylup-12-en-28-oic acid (2), three known triterpenoids lupeol (3), spinosic acid A (4) and oleanolic acid (5), together with four known steroids (20R)-22E-24-ethylcholesta-4,22-dien-3-one (6), (20R)-24-ethylcholest-4-en-3-one (7), stigmasterol (8) and β-sitosterol (9). HREIMS, GC-MS and NMR experiments including HSQC, HMBC, COSY and NOESY were used for the determination of the structures and NMR spectral assignments. This is the first report about the chemical constituents for this plant.
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Fan P, Marston A, Hay AE, Hostettmann K. Rapid separation of three glucosylated resveratrol analogues from the invasive plant Polygonum cuspidatum by high-speed countercurrent chromatography. J Sep Sci 2009; 32:2979-84. [PMID: 19639547 DOI: 10.1002/jssc.200900057] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Three glucosylated resveratrol analogues (piceid, piceatannol glucoside, resveratroloside) were successfully isolated from the crude MeOH extract of the invasive plant species Polygonum cuspidatum by semi-preparative high-speed countercurrent chromatography with a two-phase solvent system composed of cyclohexane-ethyl acetate-methanol-water (1:5:1:5, v/v/v/v). Piceid (23 mg), resveratroloside (17 mg), piceatannol glucoside (15 mg) of purities over 80% were isolated from 500 mg crude MeOH extract in one step. Subsequent passage over a SPE column was used to quickly bring their purities to over 90%. The purities were determined by HPLC analysis and their structures were elucidated by proton nuclear magnetic resonance ((1)H-NMR), HMBC, ESI-MS and HR-MS.
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Affiliation(s)
- Peihong Fan
- Laboratory of Pharmacognosy and Phytochemistry, School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Quai Ernest Ansermet, Geneva, Switzerland
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19
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Martin F, Hay AE, Quinteros Condoretty VR, Cressend D, Reist M, Gupta MP, Carrupt PA, Hostettmann K. Antioxidant phenylethanoid glycosides and a neolignan from Jacaranda caucana. J Nat Prod 2009; 72:852-856. [PMID: 19361168 DOI: 10.1021/np900038j] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Extracts from several plants of the family Bignoniaceae from Panama were submitted to a rapid DPPH TLC test for the detection of radical-scavenging activity. The MeOH extract of the stems of Jacaranda caucana, a tree that grows from Costa Rica to Colombia, was selected due to its interesting activity and the lack of phytochemical studies on the polar extract. This extract was partitioned between ethyl acetate, butanol, and water. The EtOAc fraction afforded two new phenylethanoid glycosides (1, 2), along with protocatechuic acid, acteoside, and jionoside D. Further purifications yielded isoacteoside and martynoside. The BuOH fraction afforded a new rhamnosyl derivative of sisymbrifolin (8), a neolignan. The structures were determined by means of spectrometric methods, including 1D and 2D NMR experiments and MS analysis.
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Affiliation(s)
- Frédéric Martin
- Laboratory of Pharmacognosy and Phytochemistry, School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Quai Ernest-Ansermet 30, CH-1211 Geneva 4, Switzerland
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20
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Martin F, Hay AE, Cressend D, Reist M, Vivas L, Gupta MP, Carrupt PA, Hostettmann K. Antioxidant C-glucosylxanthones from the leaves of Arrabidaea patellifera. J Nat Prod 2008; 71:1887-1890. [PMID: 18950229 DOI: 10.1021/np800406q] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Chemical investigation of the methanol extract from the leaves of Arrabidaea patellifera, a Bignoniaceae from Panama, afforded mangiferin, isomangiferin, and six new derivatives (3'-O-p-hydroxybenzoylmangiferin, 3'-O-trans-coumaroylmangiferin, 6'-O-trans-coumaroylmangiferin, 3'-O-trans-cinnamoylmangiferin, 3'-O-trans-caffeoylmangiferin, and 3'-O-benzoylmangiferin). All these compounds had antioxidant and radical-scavenging activities, and four of them were relatively active in vitro against Plasmodium falciparum. The structures were determined by spectrometric and chemical methods, including 1D and 2D NMR experiments and MS analysis.
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Affiliation(s)
- Frédéric Martin
- Laboratory of Pharmacognosy and Phytochemistry, School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Quai Ernest-Ansermet 30, CH-1211 Geneva 4, Switzerland
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Hay AE, Merza J, Landreau A, Litaudon M, Pagniez F, Le Pape P, Richomme P. Antileishmanial polyphenols from Garcinia vieillardii. Fitoterapia 2007; 79:42-6. [PMID: 17826924 DOI: 10.1016/j.fitote.2007.07.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [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: 12/19/2006] [Accepted: 07/18/2007] [Indexed: 11/24/2022]
Abstract
Seven xanthones, the new vieillardiixanthones B and C (1) and (7), pancixanthones A (2), B (3), 1,6-dihydroxyxanthone (6), pyranojacareubin and 5,6-O-dimethyl-2-deprenylrheediaxanthone together with two benzophenones, clusiachromene (4) and 3-geranyl-2,4,6-trihydroxybenzophenone (5) were isolated from the stem bark of the neocaledonian Garcinia vieillardii. 2, 5 and 6 showed a significant antileishmanial activity against the promastigote forms of Leishmania mexicana and L. infantum and against the amastigote forms of L. infantum.
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Affiliation(s)
- Anne-Emmanuelle Hay
- SONAS, UFR des Sciences Pharmaceutiques et d'Ingénierie de la Santé, 16 Bd Daviers, 49100 Angers, France.
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Martin F, Hay AE, Corno L, Gupta MP, Hostettmann K. Iridoid glycosides from the stems of Pithecoctenium crucigerum (Bignoniaceae). Phytochemistry 2007; 68:1307-11. [PMID: 17382978 DOI: 10.1016/j.phytochem.2007.02.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2006] [Revised: 02/05/2007] [Accepted: 02/06/2007] [Indexed: 05/14/2023]
Abstract
Sixteen crude extracts from six Panamanian plants of the family Bignoniaceae were submitted to rapid TLC tests against DPPH and acetylcholinesterase. Pithecoctenium crucigerum (L.) A.H. Gentry, which showed interesting activity against DPPH, has been studied. The chemical investigation of the methanol extract from the stems afforded the iridoid glycoside theviridoside and three derivatives (6'-O-cyclopropanoyltheviridoside, 10-O-hydroxybenzoyltheviridoside and 10-O-vanilloyltheviridoside), along with five known phenylethanoid glycosides (verbascoside, isoverbascoside, forsythoside B, jionoside D and leucosceptoside B). These last compounds were all active against DPPH. The structures were determined by means of spectrometric and chemical methods, including 1D and 2D NMR experiments and MS analysis.
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Affiliation(s)
- Frédéric Martin
- Laboratory of Pharmacognosy and Phytochemistry, School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Quai Ernest-Ansermet 30, CH-1211 Geneva 4, Switzerland
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Hay AE, Ioset JR, Ahua KM, Diallo D, Brun R, Hostettmann K. Limonoid orthoacetates and antiprotozoal compounds from the roots of Pseudocedrela kotschyi. J Nat Prod 2007; 70:9-13. [PMID: 17253841 DOI: 10.1021/np0680230] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The dicholoromethane extract of Pseudocedrela kotschyi root demonstrated marked antileishmanial properties in preliminary screening of extracts from 21 species commonly used in Malian traditional medicine. Phytochemical investigation of the active extract yielded three novel phragmalin-type limonoid orthoacetates (1-3), named kotschyins A-C, and the known compounds 7-deacetylgedunin (4) and 7-deacetyl-7-oxogedunin (5). The structures of 1-3 were elucidated by analytical methods including 1D- and 2D-NMR spectroscopy together with MS spectroscopy. The relative configurations of 1-3 were assigned on the basis of NOE correlations. The extract and the isolated compounds were tested for their antiprotozoal activities against Leishmania donovani, Trypanosoma brucei rhodesiense, Trypanosoma cruzi, and Plasmodium falciparum as well as for cytotoxicity toward the L-6 cell line. The crude extract and the two gedunin derivatives exhibited good in vitro activity against all of these parasites.
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Affiliation(s)
- Anne-Emmanuelle Hay
- Laboratory of Pharmacognosy and Phytochemistry, Geneva-Lausanne School of Pharmacy, University of Geneva, CH-1211 Geneva 4, Switzerland
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Queiroz EF, Hay AE, Chaaib F, van Diemen D, Diallo D, Hostettmann K. New and bioactive aromatic compounds from Zanthoxylum zanthoxyloides. Planta Med 2006; 72:746-50. [PMID: 16783692 DOI: 10.1055/s-2006-941504] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
In the course of a study of medicinal plants from Mali, the root bark of Zanthoxylum zanthoxyloides Lam. (Rutaceae) was investigated. The root bark of this plant is used as a toothbrush by West African people. Phytochemical investigation of the MeOH extract of Zanthoxylum zanthoxyloides Lam. (Rutaceae) led to the isolation of different biologically active compounds. The separation of acetylcholinesterase inhibitors was performed by centrifugal partition chromatography (CPC). The fractions were monitored by direct TLC bioautographic assays. The bio-guided isolation led to the isolation of a new peroxide derivative. In addition, LC/UV/MS analysis performed on the crude MeOH extract allowed on-line identification of some known compounds. The structures of the isolated compounds were elucidated by classical spectroscopic methods including UV, NMR, MS and HR-MS.
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Affiliation(s)
- Emerson F Queiroz
- Laboratoire de Pharmacognosie et Phytochimie, Ecole de Pharmacie Genève-Lausanne, Université de Genève, Genève, Switzerland
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Cavin AL, Hay AE, Marston A, Stoeckli-Evans H, Scopelliti R, Diallo D, Hostettmann K. Bioactive diterpenes from the fruits of Detarium microcarpum. J Nat Prod 2006; 69:768-73. [PMID: 16724838 DOI: 10.1021/np058123q] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
A fruit pulp extract of Detarium microcarpum showed inhibition of the growth of the plant pathogenic fungus Cladosporium cucumerinum and of the enzyme acetylcholinesterase, implicated in Alzheimer's disease. Fractionation of this extract led to the isolation of four new clerodane diterpenes, 3,4-epoxyclerodan-13E-en-15-oic acid (1), 5alpha,8alpha(2-oxokolavenic acid) (2), 3,4-dihydroxyclerodan-13E-en-15-oic acid (4), and 3,4-dihydroxyclerodan-13Z-en-15-oic acid (5). Also isolated were 2-oxokolavenic acid (3) and copalic acid (6). Structure elucidation of the compounds was carried out by spectroscopic data interpretation and by the X-ray crystallography of 2 and 4. Three of the new clerodane diterpenes (1, 2, and 5) showed both antifungal activity and inhibition of acetylcholinesterase, and 3 showed a slight inhibition of this enzyme.
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Affiliation(s)
- Anne-Laure Cavin
- Laboratory of Pharmacognosy and Phytochemistry, School of Pharmaceutical Sciences, University of Geneva, CH-1211 Geneva 4, Switzerland
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Hay AE, Hélesbeux JJ, Duval O, Labaïed M, Grellier P, Richomme P. Antimalarial xanthones from Calophyllum caledonicum and Garcinia vieillardii. Life Sci 2004; 75:3077-85. [PMID: 15474559 DOI: 10.1016/j.lfs.2004.07.009] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.9] [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: 03/25/2004] [Accepted: 07/15/2004] [Indexed: 11/16/2022]
Abstract
The antimalarial activity of 22 xanthones against chloroquino-resistant strains of Plasmodium falciparum was evaluated. Natural caloxanthone C (1), demethylcalabaxanthone (2), calothwaitesixanthone (3), calozeyloxanthone (4), dombakinaxanthone (5), macluraxanthone (6), and 6-deoxy-gamma-mangostin (7) were isolated from Calophyllum caledonicum. 1,6-dihydroxyxanthone (8), pancixanthone A (9), isocudraniaxanthone B (10), isocudraniaxanthone A (11), 2-deprenylrheediaxanthone B (12) and 1,4,5-trihydroxyxanthone (13) were isolated from Garcinia vieillardii. Moreover, synthetic compounds (14-22) are analogues or intermediates of xanthones purified from Calophyllum caledonicum (Oger J.M., Morel C., Helesbeux J.J., Litaudon M., Seraphin D., Dartiguelongue C., Larcher G., Richomme P., Duval O. 2003. First 2-Hydroxy-3-Methylbut-3-Enyl substituted xanthones isolated from Plants: structure elucidation, synthesis and antifungal activity. Natural Product Research 17(3), 195-199; Helesbeux J.J., Duval O., Dartiguelongue C., Seraphin D., Oger J.M., Richomme P., 2004. Synthesis of 2-hydroxy-3-methylbut-3-enyl substituted coumarins and xanthones as natural products. Application of the Schenck ene reaction of singlet oxygen with ortho-prenylphenol precursors. Tetrahedron 60(10), 2293-2300). The relationship between antimalarial activity and molecular structure of xanthones has also been explored. The most potent xanthones (2), (3) and (7) (IC50 = c.a. 1.0 microg/mL) are 1,3,7 trioxygenated and prenylated on the positions 2 and 8.
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Affiliation(s)
- Anne-Emmanuelle Hay
- SONAS, UFR des Sciences pharmaceutiques et Ingénierie de la santé, 16, Bd Daviers, Angers, France
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Abstract
Two new xanthones, 6-O-methyl-2-deprenylrheediaxanthone B (1) and vieillardixanthone (2), were isolated from the stem bark of Garcinia vieillardii, as were four known compounds (4-7). The structures of 1 and 2 were determined by means of spectroscopic analysis and chemical derivatization. Each isolate was tested for its antioxidant properties based on a scavenging activity study using the stable 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical.
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Affiliation(s)
- Anne-Emmanuelle Hay
- SONAS, UFR des Sciences Pharmaceutiques et Ingénierie de la Santé, 16 Bd Daviers, F-49100 Angers, France
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Chosson E, Hay AE, Chiaroni A, Favel A, Tillequin F, Litaudon M, Seguin E. Sarcodifurines A and B, Two New Furoquinolines from Sarcomelicope follicularis. HETEROCYCLES 2004. [DOI: 10.3987/com-04-10146] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Morel C, Hay AE, Litaudon M, Sévenet T, Séraphin D, Bruneton J, Richomme P. Thirteen New Xanthone Derivatives from Calophyllum caledonicum (Clusiaceae). Molecules 2002. [PMCID: PMC6146543 DOI: 10.3390/70100038] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [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] [Indexed: 12/02/2022] Open
Abstract
An EtOAc extract of the stem bark of Calophyllum caledonicum (Clusiaceae) yielded thirteen new hydroxylated and/or prenylated xanthone derivatives, namely 5-hydroxy-8-methoxyxanthone (1), 3,5-dihydroxy-1,2-dimethoxyxanthone (2), 1,8-dihydroxy-6,7-dimethoxyxanthone (3), 5,7-dihydroxy-2,6-dimethoxyxanthone (4), 6,8-dihydroxy-3,7-dimethoxy-xanthone (5), 2,5,6,7,8-pentahydroxyxanthone (6), 1,3,8-trihydroxy-5,7-dimethoxyxanthone (7) and according to a previously adopted nomenclature [3], caledonixanthone G-L. (8-13). The structural elucidation of 1-13 were mainly established on the basis of 1D and 2D NMR and HRMS spectroscopic analysis.
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Affiliation(s)
- Cécile Morel
- SONAS, UFR des Sciences Pharmaceutiques et Ingénierie de la santé, 16 Bd Daviers, F-49100 Angers, France
| | - Anne-Emmanuelle Hay
- SONAS, UFR des Sciences Pharmaceutiques et Ingénierie de la santé, 16 Bd Daviers, F-49100 Angers, France
| | | | | | - Denis Séraphin
- SONAS, UFR des Sciences Pharmaceutiques et Ingénierie de la santé, 16 Bd Daviers, F-49100 Angers, France
| | - Jean Bruneton
- SONAS, UFR des Sciences Pharmaceutiques et Ingénierie de la santé, 16 Bd Daviers, F-49100 Angers, France
| | - Pascal Richomme
- SONAS, UFR des Sciences Pharmaceutiques et Ingénierie de la santé, 16 Bd Daviers, F-49100 Angers, France
- Author to whom correspondence should be addressed; e-mail:
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Dupau P, Hay AE, Alameda Angulo C, Dixneuf PH, Bruneau C. Direct Preparation of N-(Alk-1-en-1-yl)carbamates from Cyclic Ketones and Unsubstituted Carbamates. ACTA ACUST UNITED AC 2002. [DOI: 10.1135/cccc20020235] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
N-(Alk-1-en-1-yl)carbamates bearing an endocyclic carbon-carbon double bond have been prepared by the reaction of unsubstituted carbamates with tetrahydronaphthalen-2-one and chroman-2-one derivatives in the presence of a catalytic amount of 4-methylbenzene-1-sulfonic acid.
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Abstract
Acoustic backscatter observations at 200 kilohertz were made of the buoyant plume from a submarine spring at a depth of 47 meters in Cambridge Fiord, Baffin Island. Vertical velocities of up to 37 centimeters per second are inferred from the ascent rates of discrete scattering structures in the plume.
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Abstract
A turbidity current surge has been detected in a leveed submarine channel in Rupert Inlet, British Columbia, with the use of acoustic sounders operating at 42.5, 107, and 200 kilohertz.
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Howitt JS, Hay AE, Shergold GR, Ferres HM. Workload and fatigue--in-flight EEG changes. Aviat Space Environ Med 1978; 49:1197-202. [PMID: 708348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Continuous recordings were made of the EEG and ECG of one pilot during a series of instrument flights in a feeder-type transport aircraft. The flights were arranged to contain epochs of distinctly differing levels of workload. In addition, some flights were made after a night of sleep deprivation and others were made as the second and third flights of the day. Subjectively, there appeared to be marked differences in performance between the two types of tired flight. The EEG analyses showed changes that correlated well with differences in workload. In the highest workload areas during fresh flights, EEG activity increased by approximately a factor of 4 over that of the preflight resting values. This large increase did not occur in the tired flights. Further experiments are planned using flights in aircraft and in simulators using several subjects.
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