PUBLICATION
Transient requirement for ganglion cells during assembly of retinal synaptic layers
- Authors
- Kay, J.N., Roeser, T., Mumm, J.S., Godinho, L., Mrejeru, A., Wong, R.O., and Baier, H.
- ID
- ZDB-PUB-040224-2
- Date
- 2004
- Source
- Development (Cambridge, England) 131(6): 1331-1342 (Journal)
- Registered Authors
- Baier, Herwig, Godinho, Leanne, Kay, Jeremy, Mrejeru, Ana, Mumm, Jeff, Roeser, Tobias
- Keywords
- none
- MeSH Terms
-
- Zebrafish Proteins/genetics
- Zebrafish Proteins/metabolism
- Enhancer Elements, Genetic
- Eye Proteins
- Retinal Ganglion Cells*
- Genes, Reporter
- Mutation
- Repressor Proteins
- Homeodomain Proteins/genetics
- Homeodomain Proteins/metabolism
- DNA-Binding Proteins/genetics
- DNA-Binding Proteins/metabolism
- Zebrafish/embryology
- Recombinant Fusion Proteins/genetics
- Recombinant Fusion Proteins/metabolism
- Retina/embryology*
- Animals
- Growth Substances/genetics
- Growth Substances/metabolism
- Paired Box Transcription Factors
- PubMed
- 14973290 Full text @ Development
Citation
Kay, J.N., Roeser, T., Mumm, J.S., Godinho, L., Mrejeru, A., Wong, R.O., and Baier, H. (2004) Transient requirement for ganglion cells during assembly of retinal synaptic layers. Development (Cambridge, England). 131(6):1331-1342.
Abstract
The inner plexiform layer (IPL) of the vertebrate retina comprises functionally specialized sublaminae, representing connections between bipolar, amacrine and ganglion cells with distinct visual functions. Developmental mechanisms that target neurites to the correct synaptic sublaminae are largely unknown. Using transgenic zebrafish expressing GFP in subsets of amacrine cells, we imaged IPL formation and sublamination in vivo and asked whether the major postsynaptic cells in this circuit, the ganglion cells, organize the presynaptic inputs. We found that in the lak/ath5 mutant retina, where ganglion cells are never born, formation of the IPL is delayed, with initial neurite outgrowth ectopically located and grossly disorganized. Over time, the majority of early neurite projection errors are corrected, and major ON and OFF sublaminae do form. However, focal regions of disarray persist where sublaminae do not form properly. Bipolar axons, which arrive later, are targeted correctly, except at places where amacrine stratification is disrupted. The lak mutant phenotype reveals that ganglion cells have a transient role organizing the earliest amacrine projections to the IPL. However, it also suggests that amacrine cells interact with each other during IPL formation; these interactions alone appear sufficient to form the IPL. Furthermore, our results suggest that amacrines may guide IPL sublamination by providing stratification cues for other cell types.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping