ZFIN ID: ZDB-PUB-170406-7
Aipl1 is required for cone photoreceptor function and survival through the stability of Pde6c and Gc3 in zebrafish
Iribarne, M., Nishiwaki, Y., Nakamura, S., Araragi, M., Oguri, E., Masai, I.
Date: 2017
Source: Scientific Reports   7: 45962 (Journal)
Registered Authors: Araragi, Masato, Iribarne, Maria, Masai, Ichiro, Nishiwaki, Yuko, Oguri, Eri
Keywords: Disease model, Hereditary eye disease, Neurodegeneration, Neurodevelopmental disorders
MeSH Terms:
  • Adaptor Proteins, Signal Transducing/genetics
  • Adaptor Proteins, Signal Transducing/metabolism*
  • Animals
  • Cell Survival
  • Cyclic GMP/metabolism
  • Cyclic Nucleotide Phosphodiesterases, Type 6/metabolism*
  • Epistasis, Genetic
  • Fertilization
  • Guanylate Cyclase/genetics
  • Guanylate Cyclase/metabolism*
  • Mutation/genetics
  • Opsins/metabolism
  • Phenotype
  • Protein Stability
  • Protein Transport
  • RNA, Messenger/genetics
  • RNA, Messenger/metabolism
  • Retinal Cone Photoreceptor Cells/cytology*
  • Retinal Cone Photoreceptor Cells/metabolism*
  • Retinal Degeneration/pathology
  • Subcellular Fractions/metabolism
  • Zebrafish/genetics
  • Zebrafish/metabolism*
  • Zebrafish Proteins/genetics
  • Zebrafish Proteins/metabolism*
PubMed: 28378769 Full text @ Sci. Rep.
Genetic mutations in aryl hydrocarbon receptor interacting protein-like 1 (AIPL1) cause photoreceptor degeneration associated with Leber congenital amaurosis 4 (LCA4) in human patients. Here we report retinal phenotypes of a zebrafish aipl1 mutant, gold rush (gosh). In zebrafish, there are two aipl1 genes, aipl1a and aipl1b, which are expressed mainly in rods and cones, respectively. The gosh mutant gene encodes cone-specific aipl1, aipl1b. Cone photoreceptors undergo progressive degeneration in the gosh mutant, indicating that aipl1b is required for cone survival. Furthermore, the cone-specific subunit of cGMP phosphodiesterase 6 (Pde6c) is markedly decreased in the gosh mutant, and the gosh mutation genetically interacts with zebrafish pde6c mutation eclipse (els). These data suggest that Aipl1 is required for Pde6c stability and function. In addition to Pde6c, we found that zebrafish cone-specific guanylate cyclase, zGc3, is also decreased in the gosh and els mutants. Furthermore, zGc3 knockdown embryos showed a marked reduction in Pde6c. These observations illustrate the interdependence of cGMP metabolism regulators between Aipl1, Pde6c, and Gc3 in photoreceptors.