PUBLICATION
Purpurin is a key molecule for cell differentiation during the early development of zebrafish retina
- Authors
- Nagashima, M., Mawatari, K., Tanaka, M., Higashi, T., Saito, H., Muramoto, K., Matsukawa, T., Koriyama, Y., Sugitani, K., and Kato, S.
- ID
- ZDB-PUB-090921-8
- Date
- 2009
- Source
- Brain research 1302: 54-63 (Journal)
- Registered Authors
- Nagashima, Mikiko
- Keywords
- Zebrafish, Retina, Development, Purpurin, Morpholino, Neurogenesis
- MeSH Terms
-
- Zebrafish Proteins/genetics
- Zebrafish Proteins/metabolism*
- Photoreceptor Cells, Vertebrate/cytology
- Photoreceptor Cells, Vertebrate/metabolism
- Protein Biosynthesis/physiology
- Gene Knockdown Techniques
- Retinol-Binding Proteins/genetics
- Retinol-Binding Proteins/metabolism*
- Transcription, Genetic/physiology
- Zebrafish/embryology*
- Zebrafish/metabolism
- Gene Expression Regulation, Developmental/genetics
- Cell Differentiation/physiology*
- RNA, Messenger/metabolism
- Retinal Ganglion Cells/cytology
- Retinal Ganglion Cells/metabolism
- Retina/cytology
- Retina/embryology*
- Retina/metabolism*
- Neurons/cytology
- Neurons/metabolism*
- Cell Proliferation
- Cell Communication/physiology
- Animals
- PubMed
- 19748496 Full text @ Brain Res.
Citation
Nagashima, M., Mawatari, K., Tanaka, M., Higashi, T., Saito, H., Muramoto, K., Matsukawa, T., Koriyama, Y., Sugitani, K., and Kato, S. (2009) Purpurin is a key molecule for cell differentiation during the early development of zebrafish retina. Brain research. 1302:54-63.
Abstract
Recently, we cloned purpurin cDNA as an upregulated gene in the axotomized fish retina. The retina specific protein was secreted from photoreceptors to ganglion cell layer during an early stage of optic nerve regeneration in zebrafish retina. The purpurin worked as a trigger molecule for axonal regrowth in adult injured fish retina. During zebrafish development, purpurin mRNA first appeared in ventral retina at 2 days post fertilization (dpf), and spread out to the outer nuclear layer at 3 dpf. Here, we investigated the role of purpurin for zebrafish retinal development using morpholino gene knockdown technique. Injection of purpurin morpholino into the 1-2 cell stage of embryos significantly inhibited the transcriptional and translational expression of purpurin at 3 dpf. In the purpurin morphant, the eyeball was significantly smaller and retinal lamination of nuclear and plexiform layers was not formed at 3 dpf. Retinal cells of purpurin morphants were still proliferative and undifferentiated at 3 dpf. The visual function of purpurin morphant estimated by optomotor response was also suppressed at 5 dpf. By contrast, the control morphants with random sequence morpholino showed retinal lamination with distinct layers and differentiated cells at 3 dpf. These results strongly suggest that purpurin is a key molecule for not only optic nerve regeneration in adult but also cell differentiation during early development in embryo.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping