Gas1 reduces Ret tyrosine 1062 phosphorylation and alters GDNF-mediated intracellular signaling

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Published on: October 27, 2020

Miguel A López-Ramírez1, Gabriela Domínguez-Monzón, Paula Vergara

  • 1Departamento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del IPN, Avenida IPN # 2508, México 07360, D.F., Mexico.

International Journal of Developmental Neuroscience : the Official Journal of the International Society for Developmental Neuroscience
|April 9, 2008
PubMed

Insights

Growth Arrest Specific 1 (Gas1) inhibits glial-cell-line-derived neurotrophic factor (GDNF) signaling by reducing Ret receptor tyrosine kinase phosphorylation and Akt activation in neuroblastoma cells.

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Cell Signaling

Background:

  • Glial-cell-derived neurotrophic factor (GDNF) is crucial for neuronal survival and differentiation, signaling via Ret receptor tyrosine kinase.
  • Growth Arrest Specific 1 (Gas1) is implicated in cell cycle arrest and apoptosis, with suggested roles in modulating GDNF family ligand (GFL) signaling due to structural homology with GFRalpha receptors.

Purpose of the Study:

  • To investigate the role of Growth Arrest Specific 1 (Gas1) in modulating glial-cell-derived neurotrophic factor (GDNF) signaling pathways.
  • To determine the effect of Gas1 expression on Ret receptor tyrosine kinase phosphorylation and Akt activation in neuroblastoma cells.

Main Methods:

  • Utilized SH-SY5Y neuroblastoma cells to study the effects of Gas1 expression.
  • Assessed the phosphorylation of Ret receptor tyrosine kinase at tyrosine 1062.
  • Measured the activation of the Akt signaling pathway.

Main Results:

  • Gas1 expression significantly inhibited GDNF-induced phosphorylation of Ret receptor tyrosine kinase (Tyr1062).
  • Gas1 significantly reduced the activation of Akt signaling.
  • These findings support Gas1's role as a negative modulator of GDNF signaling.

Conclusions:

  • Gas1 acts as a negative regulator of the GDNF/Ret signaling pathway in neuronal cells.
  • The study provides evidence for Gas1's function in modulating neurotrophic factor signaling, impacting neuronal survival and differentiation pathways.

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