The Small GTP-Binding Protein Rhes Influences Nigrostriatal-Dependent Motor Behavior During Aging

Paolo Calabresi, Annalisa Pinna, Francesco Napolitano, Barbara Pelosi, Anna Di Maio, Jadwiga Wardas, Maria Antonietta Casu, Giulia Costa, Sara Migliarini, Massimo Pasqualetti, Micaela Morelli, Alessandro Usiello

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Background: Here we aimed to evaluate: (1) Rhes mRNA expression in mouse midbrain, (2) the effect of Rhes deletion on the number of dopamine neurons, (3) nigrostriatal-sensitive behavior during aging in knockout mice. Methods: Radioactive in situ hybridization was assessed in adult mice. The beam-walking test was executed in 3-, 6- and 12-month-old mice. Immunohistochemistry of midbrain tyrosine hydroxylase (TH)-positive neurons was performed in 6- and 12-month-old mice. Results: Rhes mRNA is expressed in TH-positive neurons of SNpc and the ventral tegmental area. Moreover, lack of Rhes leads to roughly a 20% loss of nigral TH-positive neurons in both 6- and 12-month-old mutants, when compared with their age-matched controls. Finally, lack of Rhes triggers subtle alterations in motor performance and coordination during aging. Conclusions: Our findings indicate a fine-tuning role of Rhes in regulating the number of TH-positive neurons of the substantia nigra and nigrostriatal-sensitive motor behavior during aging.
Original languageEnglish
Pages (from-to)583-589
Number of pages7
JournalMovement Disorders
Volume31
DOIs
Publication statusPublished - 2016

Keywords

  • Aging
  • Animals
  • Behavior, Animal
  • Corpus Striatum
  • Dopamine neurons
  • Dopaminergic Neurons
  • GTP-Binding Proteins
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Mice, Knockout
  • Midbrain
  • Psychomotor Performance
  • Rasd2
  • Rhes
  • Substantia Nigra
  • TH-positive neurons
  • Tyrosine 3-Monooxygenase

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