ZFIN ID: ZDB-PUB-121016-35
Zebrafish rgs4 is essential for motility and axonogenesis mediated by Akt signaling
Cheng, Y.C., Scotting, P.J., Hsu, L.S., Lin, S.J., Shih, H.Y., Hsieh, F.Y., Wu, H.L., Tsao, C.L., and Shen, C.J.
Date: 2013
Source: Cellular and molecular life sciences : CMLS   70(5): 935-950 (Journal)
Registered Authors: Scotting, Paul J.
Keywords: Rgs4, axonogenesis, akt, zebrafish
MeSH Terms:
  • Amino Acid Sequence
  • Animals
  • Axons/metabolism*
  • Axons/pathology*
  • Gene Expression Regulation, Developmental
  • Gene Knockdown Techniques
  • Humans
  • Molecular Sequence Data
  • Nervous System/embryology
  • Nervous System/metabolism
  • Nervous System/pathology
  • Neurogenesis
  • Neurons/cytology*
  • Neurons/metabolism
  • Neurons/pathology
  • Phylogeny
  • Proto-Oncogene Proteins c-akt/metabolism*
  • RGS Proteins/chemistry
  • RGS Proteins/genetics
  • RGS Proteins/metabolism*
  • Sequence Alignment
  • Signal Transduction
  • Zebrafish/embryology
  • Zebrafish/genetics
  • Zebrafish/metabolism*
PubMed: 23052218 Full text @ Cell. Mol. Life Sci.

The schizophrenia susceptibility gene, Rgs4, is one of the most intensively studied regulators of G-protein signaling members, well known to be fundamental in regulating neurotransmission. However, little is known about its role in the developing nervous system. We have isolated zebrafish rgs4 and shown that it is transcribed in the developing nervous system. Rgs4 knockdown did not affect neuron number and patterning but resulted in locomotion defects and aberrant development of axons. This was confirmed using a selective Rgs4 inhibitor, CCG-4986. Rgs4 knockdown also attenuated the level of phosphorylated-Akt1, and injection of constitutively-activated AKT1 rescued the motility defects and axonal phenotypes in the spinal cord but not in the hindbrain and trigeminal neurons. Our in vivo analysis reveals a novel role for Rgs4 in regulating axonogenesis during embryogenesis, which is mediated by another schizophrenia-associated gene, Akt1, in a region-specific manner.