Search Results - (Author, Cooperation:N. Ferrand)

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  1. 1
    Staff View
    Publication Date:
    2014-08-30
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Animals ; Animals, Domestic/anatomy & histology/*genetics/psychology ; Animals, Wild/anatomy & histology/*genetics/psychology ; Base Sequence ; Behavior, Animal ; Breeding ; Evolution, Molecular ; Gene Frequency ; Genetic Loci ; Genome/genetics ; Molecular Sequence Data ; Phenotype ; Polymorphism, Single Nucleotide ; Rabbits/anatomy & histology/*genetics/psychology ; Selection, Genetic ; Sequence Analysis, DNA
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2018-06-02
    Publisher:
    The American Association for Cancer Research (AACR)
    Print ISSN:
    1078-0432
    Electronic ISSN:
    1557-3265
    Topics:
    Medicine
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  3. 3
    Tosetti, P. ; Bakels, R. ; Colin-Le Brun, I. ; Ferrand, N. ; Gaiarsa, J. L. ; Caillard, O.

    Oxford, UK : Blackwell Science Ltd
    Published 2004
    Staff View
    ISSN:
    1460-9568
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Medicine
    Notes:
    The consequences of sustained activation of GABAB receptors on GABAB-mediated inhibition and network activity were investigated in the neonatal rat hippocampus using whole-cell and extracellular field recordings. GABAB-mediated presynaptic control of γ-aminobutyric acid (GABA) release progressively diminished with time in spite of the continued presence of the agonist (100 µm baclofen, 15 min), indicating acute desensitization of presynaptic GABAB-mediated inhibition on GABAergic terminals. By contrast, neither GABAB-mediated inhibition of glutamate release nor postsynaptic GABAB-mediated inhibition seemed to produce this desensitization. Efficacy of presynaptic GABAB receptors was still reduced by 49% 30 min after baclofen washout, suggesting a long timeframe for recovery from desensitization. The 15-min baclofen application was followed by a dramatic modification of the spontaneous network activity, with the occurrence of epileptiform events called ictal-like discharges (ILDs). Extracellular field recordings confirmed the epileptic nature of the discharges that could be recorded up to 4 h after baclofen washout. ILDs did not occur when the GABAB receptor antagonist CGP35348 was coapplied with baclofen. This indicates that ILD induction is a consequence of the sustained activation of GABAB receptors and the correlated changes in GABAB-mediated inhibition. Furthermore, ILDs were also induced when blocking with CGP35348 an amount of GABAB receptors that exactly mimicked the loss of inhibition obtained with desensitization. These results show that presynaptic GABAB-mediated inhibition of GABA release acutely and specifically desensitizes following a sustained application of the GABAB receptor agonist baclofen. Conditions that induce desensitization of the GABAB-mediated responses also trigger persistent epileptiform discharges in the neonatal rat hippocampus.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  4. 4
    Alexandrino, P. J. ; Sousa, C. ; Pereira, A. ; Ferrand, N.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1993
    Staff View
    ISSN:
    1095-8649
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Biology
    Notes:
    A genetic polymorphism of adenosine deaminase (ADA), is described for the first time in European shad species, Alosa alosa and Alosa fallax. Significant heterogeneity in gene frequencies was found, both between species and within species.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  5. 5
    Alexandrino, P. J. ; Ferrand, N. ; Rocha, J.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1996
    Staff View
    ISSN:
    1095-8649
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Biology
    Notes:
    The degree of genetic differentiation between European shads, Alosa alosa and A. fallax, was studied in populations from different Portuguese hydrographic basins. Using isoelectric focusing, polymorphic variation was detected in a haemoglobin (HB) chain and in adenosine deaminase (ADA). These polymorphisms are shared by the two species but show significant differences in their gene frequency distributions. Individuals with intermediate morphological characteristics were found to exhibit intermediate allele frequencies. While not completely excluding introgression, our results strongly support the existence of two distinct species that can hybridize.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  6. 6
    Antunes, A. ; Alexandrino, P. ; Ferrand, N.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1999
    Staff View
    ISSN:
    1600-0633
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Biology
    Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes:
    Abstract– Allozyme and other protein loci were examined to study the genetic structure of Portuguese brown trout (Salmo trutta) populations. A total of 247 individuals from three tributaries of the Lima hydrological basin and a hatchery, all located in northern Portugal, were analyzed. Four of 22 protein coding loci were found to be polymorphic: CK-A1*, GPI-A2*, MPI-2* and TF*. A new allelc at the latter locus was found in Atlantic populations. The data obtained for Portuguese brown trout were compared with published data for 14 European populations and three hatchery stocks. Six polymorphic loci (CK-A1*, GPI-A2*, GPI-B2*, LDH-C*, ME* and MPI-2*) were used in a cluster analysis. This showed the similarity of Portuguese natural populations and northern Iberian populations and that Portuguese hatchery fish have an autochthonous origin, distinct from that of other Atlantic hatchery stocks.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  7. 7
    ASTESANO, A. ; FERRAND, N. ; BENDAYAN, M. ; ROSSELIN, G.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1996
    Staff View
    ISSN:
    1749-6632
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Natural Sciences in General
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  8. 8
    FERRAND, N. ; ROSSELIN, G.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1996
    Staff View
    ISSN:
    1749-6632
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Natural Sciences in General
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  9. 9
    Antunes, A. ; Ferrand, N. ; Alexandrino, P.
    Springer
    Published 2000
    Staff View
    ISSN:
    1573-4927
    Keywords:
    plasma protein ; polymorphism ; isoelectric focusing ; brown trout; Salmo trutta ; salmonids.
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Chemistry and Pharmacology
    Notes:
    Abstract Genetic polymorphism of an unidentified plasma protein (PX) is described for the first time in Salmo trutta (L.) by means of isoelectric focusing. The analysis of 414 individuals from different geographic origins in Portugal allowed the identification of nine alleles. Heterozygosity in natural populations is generally above 0.60, thus giving similar values to those reported for brown trout microsatellite loci. Substructuring of Portuguese brown trout is evident between northern and southern basins. Genetic affinities between the southernmost rivers and the hatchery stock were detected, suggesting the existence of recent stocking influences.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  10. 10
    Branco, M. ; MaChado, J. C. ; Ferrand, N.
    Springer
    Published 1999
    Staff View
    ISSN:
    1573-4927
    Keywords:
    PEPTIDASES ; RABBIT ; ELECTROPHORESIS ; GENETIC POLYMORPHISM ; HETEROZYGOSITY ; CLINAL ; VARIATION
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Chemistry and Pharmacology
    Notes:
    Abstract Genetic polymorphism of peptidases A, B, C, andD in the wild rabbit (Oryctolagus cuniculus)was assessed by horizontal starch gel electrophoresis,in a total of 1003 individuals comprising 16 Iberian and 2 French populations and 1 domestic stock.Twenty-five different alleles were detected: 6 in PEPA,4 in PEPB, 8 in PEPC, and 7 in PEPD. The highest valuesof observed heterozygosity averaged over the four loci were obtained for the southwestern Iberianpopulations and a clinal loss of variability in anortheastern direction was detected. A clear separationbetween the two putative subspecies O. c.cuniculus and O. c. algirus was notobtained.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses