Search Results - (Author, Cooperation:M. Pirro)

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  1. 1
    Staff View
    Publication Date:
    2014-06-17
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Animals ; Bacterial Infections/immunology/metabolism ; Disease Resistance/drug effects/*genetics/*immunology ; Endotoxemia/genetics/immunology/metabolism ; Enzyme Activation/drug effects ; Gene Expression Regulation/drug effects ; Indoleamine-Pyrrole 2,3,-Dioxygenase/metabolism ; Inflammation/enzymology/genetics/metabolism ; Kynurenine/metabolism ; Lipopolysaccharides/pharmacology ; Mice ; Phosphorylation ; Receptors, Aryl Hydrocarbon/genetics/*metabolism ; Signal Transduction ; Tryptophan Oxygenase/metabolism ; src-Family Kinases/metabolism
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    De Pirro, M. ; Cannicci, S. ; Santini, G.
    Springer
    Published 1999
    Staff View
    ISSN:
    1432-1793
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Notes:
    Abstract A multi-factorial experiment was designed to investigate the effect of the following factors on the cardiac activity of the intertidal crab Pachygrapsus marmoratus: respiratory medium (air, water), temperature (four levels, 10, 17.5, 25, 32.5 °C), season (winter, summer) and body size (two levels, carapace ≤21 mm and carapace 〉21 mm). The results showed that the heart rate of P. marmoratus increased linearly with temperature and decreased when the specimens were exposed to air rather than water. Moreover, the heart rate values in summer were lower than those in winter at the corresponding temperature and body size. The summer heart rate–temperature regression line was laterally (to the right) shifted with respect to the winter line, suggesting a seasonal acclimation. Body size affected heart rate only at the acclimation temperature (17.5 °C), while no significant effect was detected at lower or higher temperatures. During the reproductive season a separate experiment was carried out to assess the effect of sex and reproductive status on heart rate. No significant difference was found among mean values of males, berried females and females without eggs. The results of the present study confirm the high physiological plasticity of this species, suggesting that P. marmoratus is a truly amphibious crab, able to deal with both water- and air-breathing during its activity.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s002270050632

    Articles: DFG German National Licenses
  3. 3
    De Pirro, M. ; Santini, G. ; Chelazzi, G.
    Springer
    Published 1999
    Staff View
    ISSN:
    1432-136X
    Keywords:
    Key words Acardia ; Bradycardia ; Heart rate ; Gastropods ; Salinity
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Medicine
    Notes:
    Abstract Cardiac activity of two Mediterranean limpets was tested at different salinities. Patella caerulea inhabits the lower midlittoral where it is exposed to variations in salinity, while P. aspera experiences more stable salinity conditions in the infralittoral fringe. When exposed to moderate hypo- and hypersalinity (23 g l−1 and 43 g l−1) for 24 min, P. caerulea showed no significant variation in heart rate with respect to the control salinity (33 g l−1), while P. aspera exhibited a significant increase in heart rate in both conditions. This suggests a rise in metabolic rate due to activation of behavioural responses or physiological regulation. When exposed to extremely low salinity (3 g l−1) for 24 min, heart contractions ceased in most specimens of P. caerulea. A smaller number of specimens also displayed cessation of heart beat when exposed to extremely high salinity (63 g l−1). The heart beat resumed quickly in all specimens when they were returned to control salinity conditions. In contrast, cardiac activity was not interrupted in any of the P. aspera specimens at the 3 g l−1 and 63 g l−1 salinity levels, but strong bradycardia was evident. Contractile activity of the heart ceased in all specimens of P. caerulea and P. aspera when they were exposed to prolonged hypo-osmotic stress (3 g l−1 for 24 h). This acardia was largely reversible in P. caerulea, but most specimens of P. aspera did not recover from the treatment.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s003600050248

    Articles: DFG German National Licenses