Publications

Latest publication 02/07/2014

The long-term consequences of the exposure to increasing gravity levels on the m

Adult male mice C57Bl6/J were exposed to gravity levels between 1G and 4G during three weeks, and the long-term consequences on muscular,...

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    [title] => The long-term consequences of the exposure to increasing gravity levels on the m
    [paragraph] => The long-term consequences of the exposure to increasing gravity levels on the muscular, vestibular and cognitive functions in adult mice
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Authors
M. Bojados, M. Jamon

 Lab
Faculté de Médecine de la Timone, Marseille, France
Journal
Behavioural Brain Research
Abstract
Adult male mice C57Bl6/J were exposed to gravity levels between 1G and 4G during three weeks, and the long-term consequences on muscular, vestibular, emotional, and cognitive abilities were evaluated at the functional level to test the hypothesis of a continuum in the response to the increasing gravitational force. In agreement with the hypothesis, the growth of body mass slowed down in relation with the gravity level during the centrifugation, and weight recovery was inversely proportional. On the other hand, the long-term consequences on muscular, vestibular, emotional, and cognitive abilities did not fit the hypothesis of a continuum in the response to the gravity level. The hypergravity acted as endurance training on muscle force until 3G, then became deleterious at 4G. The vestibular reactions were not affected until 4G. Persistent emotional reactions appeared at 3G, and particularly 4G. The mice centrifuged at 3G and 4G showed an impaired spatial learning, probably in relation with the increased level of anxiety, but a greater difficulty was also observed in mice exposed at 2G, suggesting another cause for the impairment of spatial memory. The long-term response to the hypergravity was shown to depend on both the level of gravity and the duration of exposition, with different importance depending on the function considered.
BIOSEB Instruments Used
Grip strength test (BIO-GS3)
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An easy way to objectively quantify the muscular strength of mice and rats, and to assess the effect of drugs, toxins, muscular (i.e. myopathy) and neurodegenerative diseases on muscular degeneration. It is widely used in conjunction with the ROTAROD motor coordination test: a normally coordinated rodent will show a decreased latency to fall off the rotating rod if its muscular strength is low. The Grip Strength Test is a must for your research on activity, motor control & coordination, and is particularly well suited for studies on Parkinson's & Huntington's disease.
New features GS4 - 2023: Color display with permanent backlight screen for easier reading, reset by footswitch, Improved battery time, Larger data memory of 500 values, Animal counter, USB port (charging/data transfer)

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