Animal cells and systems

The Korean Society for Integrative Biology (한국통합생물학회)
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Effects of Microgravity on Vestibular Development and Function in Rats: Genetics and Environment

  • Ronca, April-E. (Ames Research Center, Moffett Field) ;
  • Fritzsch, Bernd (Department of Biomedical Sciences, Creighton University) ;
  • Alberts, Jeffrey-R. (Indiana University, Bloomington) ;
  • Bruce, Laura-L. (Ames Research Center, Moffett Field)
  • Published : 2000.09.01
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Abstract

Our anatomical and behavioral studies of embryonic rats that developed in microgravity suggest that the vestibular sensory system, like the visual system, has genetically mediated precesses of development that establish crude connections between the periphery and the brain. Environmental stimuli also regulate connection formation including terminal branch formation and fine-tuning of synaptic contacts. Axons of vestibular sensory neurons from grabistatic as well as linear acceleration receptors reach their targets in both microgravity and norm81 gravity, suggesting that this is a genetically regulated component of development. However, microgravity exposure delays the development of terminal branches and synapses in gravistatic but not linear acceleration-sensitive neurons and also produces behavioral changes. These latter changes reflect environmentally controlled processes of development.

Keywords

References

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