Comparison of Retinal Degeneration in the Normal Goldfish and the Megalophthalmic Black Moor Goldfish after Optic Nerve Transection and Lens Extraction

Xiao, Ying; Wai, Maria Sen Mun; Wang, Yi; Lau, Jeanie; Forster, E. Lucy; Yew, David T.

doi:10.1080/00207450802325694

Cited by 1 publication

(1 citation statement)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, the eyes of dragon-eye goldfish are aspheric and extremely myopic (Easter Jr and Hitchcock, 1986); therefore, they are useful for the study of focus adjustment mechanisms (Omori and Kon, 2019). These goldfish are also considered important model animals of optic nerve regeneration (Kaneda et al, 2008;Ying et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Upregulation of the PPAR signaling pathway and accumulation of lipids are related to the morphological and structural transformation of the dragon-eye goldfish eye

Wang

Yang

et al. 2021

Sci. China Life Sci.

View full text Add to dashboard Cite

Goldfish comprise around 300 different strains with drastically altered and aesthetical morphologies making them suitable models for evolutionary developmental biology. The dragon-eye strain is characterized by protruding eyes (analogous to those of Chinese dragons). Although the strain has been selected for about 400 years, the mechanism of its eye development remains unclear. In this study, a stable dragon-eye goldfish strain with a clear genetic background was rapidly established and studied. We found that upregulation of the PPAR signaling pathway accompanied by an increase in lipid accumulation might trigger the morphological and structural transformation of the eye in dragon-eye goldfish. At the developmental stage of proptosis (eye protrusion), downregulation of the phototransduction pathway was consistent with the structural defects and myopia of the dragon-eye strain. With the impairment of retinal development, cytokine-induced inflammation was activated, especially after proptosis, similar to the pathologic symptoms of many human ocular diseases. In addition, differentially expressed transcription factors were significantly enriched in the PAX and homeobox families, two well-known transcription factor families involved in eye development. Therefore, our findings reveal the dynamic changes in key pathways during eye development in dragon-eye goldfish, and provide insights into the molecular mechanisms underlying drastically altered eyes in goldfish and human ocular disease.

show abstract