Louis C

References (8)

Title : Synergistic enhancing-memory effect of donepezil and S 47445, an AMPA positive allosteric modulator, in middle-aged and aged mice - Bretin_2018_Psychopharmacology.(Berl)_235_771
Author(s) : Bretin S , Krazem A , Henkous N , Froger-Colleaux C , Mocaer E , Louis C , Perdaems N , Marighetto A , Beracochea D
Ref : Psychopharmacology (Berl) , 235 :771 , 2018
Abstract : Positive allosteric modulators of AMPA receptors (AMPA-PAMs) are described to facilitate cognitive processes in different memory-based models. Among them, S 47445 is a novel potent and selective AMPA-PAM. In order to assess its efficacy after repeated administration, S 47445 effect was evaluated in two aging-induced memory dysfunction tasks in old mice, one short-term working memory model evaluated in a radial maze task and one assessing contextual memory performance. S 47445 was shown to improve cognition in both models sensitive to aging. In fact, administration of S 47445 at 0.3 mg/kg (s.c.) reversed the age-induced deficits of the working memory model whatever the retention interval. Moreover, in the contextual task, S 47445 also reversed the age-induced deficit at all tested doses (from 0.03 to 0.3 mg/kg, p.o.). Since donepezil, an acetylcholinesterase inhibitor, induces only moderate symptomatic effects on memory in Alzheimer's disease patients, an alternative strategy for treatment of cognitive symptoms could be to act simultaneously on both glutamatergic AMPA receptors and cholinergic pathways by combining pharmacological treatments. The present study further examined such effects by assessing combinations of S 47445 and donepezil given orally during 9 days in aged C57/Bl6J mice using contextual memory task (CSD) and the working memory model of serial alternation task (AT). Interestingly, a significant synergistic memory-enhancing effect was observed with the combination of donepezil at 0.1 mg/kg with S 47445 at 0.1 mg/kg p.o. in the CSD or with S 47445 at 0.1 and 0.3 mg/kg in AT in comparison to compounds given alone and without any pharmacokinetic interaction.
ESTHER : Bretin_2018_Psychopharmacology.(Berl)_235_771
PubMedSearch : Bretin_2018_Psychopharmacology.(Berl)_235_771
PubMedID: 29167913

Title : Poster: Pharmacological profile of S 76892, a new ligand at nicotinic alpha7-subtype receptors -
Author(s) : Danober L , Louis C , Rogez N , Thomas JY , Das Dores G , Gandon MH , Hugot A , Beracochea D , Krazem A , Bertaina-Anglade V , Rimet D , Pillot T , Bertrand M , Fourquez JM , Botez I , Lestage P
Ref : Biochemical Pharmacology , 97 :624 , 2015

Title : Working memory deficits and related disinhibition of the cAMP\/PKA\/CREB are alleviated by prefrontal alpha4beta2*-nAChRs stimulation in aged mice - Vandesquille_2013_Neurobiol.Aging_34_1599
Author(s) : Vandesquille M , Baudonnat M , Decorte L , Louis C , Lestage P , Beracochea D
Ref : Neurobiology of Aging , 34 :1599 , 2013
Abstract : The present study investigates in aged mice the working memory (WM) enhancing potential of the selective alpha4beta2* nicotinic receptor agonist S 38232 as compared with the cholinesterase inhibitor donepezil, and their effect on cAMP response element binding protein (CREB) phosphorylation (pCREB) as a marker of neuronal activity. We first showed that aged mice exhibit a WM deficit and an increase of pCREB in the prelimbic cortex (PL) as compared with young mice, whereas no modification appears in the CA1. Further, we showed that systemic administration of S 38232 restored WM in aged mice and alleviated PL CREB overphosphorylation. Donepezil alleviated age-related memory deficits, however, by increasing pCREB in the CA1, while pCREB in PL remained unaffected. Finally, whereas neuronal inhibition by lidocaine infusion in the PL appeared deleterious in young mice, the infusion of Rp-cAMPS (a compound known to inhibit CREB phosphorylation) or S 38232 rescued WM in aged animals. Thus, by targeting the alpha4beta2*-nicotinic receptor of the PL, S 38232 alleviates PL CREB overphosphorylation and restores WM in aged mice, which opens new pharmacologic perspectives of therapeutic strategy.
ESTHER : Vandesquille_2013_Neurobiol.Aging_34_1599
PubMedSearch : Vandesquille_2013_Neurobiol.Aging_34_1599
PubMedID: 23352115

Title : Effects of positive modulators of alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA)-type glutamate receptors in a benzodiazepine-induced deficit of spatial discrimination in mice - Vandesquille_2012_J.Psychopharmacol_26_845
Author(s) : Vandesquille M , Carrie I , Louis C , Beracochea D , Lestage P
Ref : J Psychopharmacol , 26 :845 , 2012
Abstract : Imbalance between GABAergic and glutamatergic neurotransmission has been recently hypothesized to trigger memory decline related either to ageing or to Alzheimer's disease (AD). Thereby, benzodiazepine-induced anterograde amnesia has been construed as a model of hippocampal-related cognitive dysfunctions. Since spatial memory is altered both by ageing and by benzodiazepines such as alprazolam, we investigated the pharmacological sensitivity of alprazolam-induced deficit in a delayed spatial discrimination (SD) task, notably with positive allosteric modulators of alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA)-type glutamate receptors. We showed that alprazolam (0.1 mg/kg intraperitoneally) induced memory impairments as compared with vehicle-treated mice. The oral administration of modulators of AMPA receptors (IDRA-21: 10 mg/kg; S18986: 3 and 10 mg/kg) reversed the alprazolam-induced deficits. This study is first to show evidence that reference treatments of AD, such as memantine (a NMDA receptor antagonist) at 3 mg/kg per os (po) and donepezil (an acetylcholinesterase inhibitor) at 1 mg/kg po, also reversed the alprazolam-induced amnesia. Given such results, the SD task emerges as a valuable novel task to screen pro-cognitive compounds. Thus, we highlight the efficacy of modulators of AMPA-type glutamate receptors to counteract alprazolam-induced spatial deficits. These results could be viewed alongside the imbalance between excitation and inhibition observed during normal and pathological ageing.
ESTHER : Vandesquille_2012_J.Psychopharmacol_26_845
PubMedSearch : Vandesquille_2012_J.Psychopharmacol_26_845
PubMedID: 21890586

Title : Gene expression in insecticide resistant and susceptible Anopheles gambiae strains constitutively or after insecticide exposure - Vontas_2005_Insect.Mol.Biol_14_509
Author(s) : Vontas J , Blass C , Koutsos AC , David JP , Kafatos FC , Louis C , Hemingway J , Christophides GK , Ranson H
Ref : Insect Molecular Biology , 14 :509 , 2005
Abstract : A microarray containing approximately 20 000 expressed sequence tags (ESTs; 11 760 unique EST clusters) from the malaria vector, Anopheles gambiae, was used to monitor differences in global gene expression in two insecticide resistant and one susceptible strains. Statistical analysis identified 77 ESTs that were differentially transcribed among the three strains. These include the cytochrome P450 CYP314A1, over-transcribed in the DDT resistant ZAN/U strain, and many genes that belong to families not usually associated with insecticide resistance, such as peptidases, sodium/calcium exchangers and genes implicated in lipid and carbohydrate metabolism. Short-term (6 and 10 h) effects of exposure of the pyrethroid resistant RSP strain to permethrin were also detected. Several genes belonging to enzyme families already implicated in insecticide or xenobiotic detoxification were induced, including the carboxylesterase COEAE2F gene and members of the UDP-glucuronosyl transferase and nitrilase families.
ESTHER : Vontas_2005_Insect.Mol.Biol_14_509
PubMedSearch : Vontas_2005_Insect.Mol.Biol_14_509
PubMedID: 16164607

Title : The Anopheles gambiae genome: an update - Mongin_2004_Trends.Parasitol_20_49
Author(s) : Mongin E , Louis C , Holt RA , Birney E , Collins FH
Ref : Trends Parasitol , 20 :49 , 2004
Abstract : As a result of an international collaborative effort, the first draft of the Anopheles gambiae genome sequence and its preliminary annotation were published in October 2002. Since then, the assembly, annotation and means of accession of the An. gambiae genome have been under continuous development. This article reviews progress and considers limitations in the current sequence assembly and gene annotation, as well as approaches to address these problems and outstanding issues that users of the data must bear in mind.
ESTHER : Mongin_2004_Trends.Parasitol_20_49
PubMedSearch : Mongin_2004_Trends.Parasitol_20_49
PubMedID: 14747013
Gene_locus related to this paper: anoga-q7q887

Title : The genome sequence of the malaria mosquito Anopheles gambiae - Holt_2002_Science_298_129
Author(s) : Holt RA , Subramanian GM , Halpern A , Sutton GG , Charlab R , Nusskern DR , Wincker P , Clark AG , Ribeiro JM , Wides R , Salzberg SL , Loftus B , Yandell M , Majoros WH , Rusch DB , Lai Z , Kraft CL , Abril JF , Anthouard V , Arensburger P , Atkinson PW , Baden H , de Berardinis V , Baldwin D , Benes V , Biedler J , Blass C , Bolanos R , Boscus D , Barnstead M , Cai S , Center A , Chaturverdi K , Christophides GK , Chrystal MA , Clamp M , Cravchik A , Curwen V , Dana A , Delcher A , Dew I , Evans CA , Flanigan M , Grundschober-Freimoser A , Friedli L , Gu Z , Guan P , Guigo R , Hillenmeyer ME , Hladun SL , Hogan JR , Hong YS , Hoover J , Jaillon O , Ke Z , Kodira C , Kokoza E , Koutsos A , Letunic I , Levitsky A , Liang Y , Lin JJ , Lobo NF , Lopez JR , Malek JA , McIntosh TC , Meister S , Miller J , Mobarry C , Mongin E , Murphy SD , O'Brochta DA , Pfannkoch C , Qi R , Regier MA , Remington K , Shao H , Sharakhova MV , Sitter CD , Shetty J , Smith TJ , Strong R , Sun J , Thomasova D , Ton LQ , Topalis P , Tu Z , Unger MF , Walenz B , Wang A , Wang J , Wang M , Wang X , Woodford KJ , Wortman JR , Wu M , Yao A , Zdobnov EM , Zhang H , Zhao Q , Zhao S , Zhu SC , Zhimulev I , Coluzzi M , della Torre A , Roth CW , Louis C , Kalush F , Mural RJ , Myers EW , Adams MD , Smith HO , Broder S , Gardner MJ , Fraser CM , Birney E , Bork P , Brey PT , Venter JC , Weissenbach J , Kafatos FC , Collins FH , Hoffman SL
Ref : Science , 298 :129 , 2002
Abstract : Anopheles gambiae is the principal vector of malaria, a disease that afflicts more than 500 million people and causes more than 1 million deaths each year. Tenfold shotgun sequence coverage was obtained from the PEST strain of A. gambiae and assembled into scaffolds that span 278 million base pairs. A total of 91% of the genome was organized in 303 scaffolds; the largest scaffold was 23.1 million base pairs. There was substantial genetic variation within this strain, and the apparent existence of two haplotypes of approximately equal frequency ("dual haplotypes") in a substantial fraction of the genome likely reflects the outbred nature of the PEST strain. The sequence produced a conservative inference of more than 400,000 single-nucleotide polymorphisms that showed a markedly bimodal density distribution. Analysis of the genome sequence revealed strong evidence for about 14,000 protein-encoding transcripts. Prominent expansions in specific families of proteins likely involved in cell adhesion and immunity were noted. An expressed sequence tag analysis of genes regulated by blood feeding provided insights into the physiological adaptations of a hematophagous insect.
ESTHER : Holt_2002_Science_298_129
PubMedSearch : Holt_2002_Science_298_129
PubMedID: 12364791
Gene_locus related to this paper: anoga-a0nb77 , anoga-a0nbp6 , anoga-a0neb7 , anoga-a0nei9 , anoga-a0nej0 , anoga-a0ngj1 , anoga-a7ut12 , anoga-a7uuz9 , anoga-ACHE1 , anoga-ACHE2 , anoga-agCG44620 , anoga-agCG44666 , anoga-agCG45273 , anoga-agCG45279 , anoga-agCG45511 , anoga-agCG46741 , anoga-agCG47651 , anoga-agCG47655 , anoga-agCG47661 , anoga-agCG47690 , anoga-agCG48797 , anoga-AGCG49362 , anoga-agCG49462 , anoga-agCG49870 , anoga-agCG49872 , anoga-agCG49876 , anoga-agCG50851 , anoga-agCG51879 , anoga-agCG52383 , anoga-agCG54954 , anoga-AGCG55021 , anoga-agCG55401 , anoga-agCG55408 , anoga-agCG56978 , anoga-ebiG239 , anoga-ebiG2660 , anoga-ebiG5718 , anoga-ebiG5974 , anoga-ebiG8504 , anoga-ebiG8742 , anoga-glita , anoga-nrtac , anoga-q5tpv0 , anoga-Q5TVS6 , anoga-q7pm39 , anoga-q7ppw9 , anoga-q7pq17 , anoga-Q7PQT0 , anoga-q7q8m4 , anoga-q7q626 , anoga-q7qa14 , anoga-q7qa52 , anoga-q7qal7 , anoga-q7qbj0 , anoga-f5hl20 , anoga-q7qkh2 , anoga-a0a1s4h1y7 , anoga-q7q887

Title : Comparative genome and proteome analysis of Anopheles gambiae and Drosophila melanogaster - Zdobnov_2002_Science_298_149
Author(s) : Zdobnov EM , von Mering C , Letunic I , Torrents D , Suyama M , Copley RR , Christophides GK , Thomasova D , Holt RA , Subramanian GM , Mueller HM , Dimopoulos G , Law JH , Wells MA , Birney E , Charlab R , Halpern AL , Kokoza E , Kraft CL , Lai Z , Lewis S , Louis C , Barillas-Mury C , Nusskern D , Rubin GM , Salzberg SL , Sutton GG , Topalis P , Wides R , Wincker P , Yandell M , Collins FH , Ribeiro J , Gelbart WM , Kafatos FC , Bork P
Ref : Science , 298 :149 , 2002
Abstract : Comparison of the genomes and proteomes of the two diptera Anopheles gambiae and Drosophila melanogaster, which diverged about 250 million years ago, reveals considerable similarities. However, numerous differences are also observed; some of these must reflect the selection and subsequent adaptation associated with different ecologies and life strategies. Almost half of the genes in both genomes are interpreted as orthologs and show an average sequence identity of about 56%, which is slightly lower than that observed between the orthologs of the pufferfish and human (diverged about 450 million years ago). This indicates that these two insects diverged considerably faster than vertebrates. Aligned sequences reveal that orthologous genes have retained only half of their intron/exon structure, indicating that intron gains or losses have occurred at a rate of about one per gene per 125 million years. Chromosomal arms exhibit significant remnants of homology between the two species, although only 34% of the genes colocalize in small "microsyntenic" clusters, and major interarm transfers as well as intra-arm shuffling of gene order are detected.
ESTHER : Zdobnov_2002_Science_298_149
PubMedSearch : Zdobnov_2002_Science_298_149
PubMedID: 12364792