RRC ID 4129
Author Sato T, Hamaoka T, Aizawa H, Hosoya T, Okamoto H.
Title Genetic single-cell mosaic analysis implicates ephrinB2 reverse signaling in projections from the posterior tectum to the hindbrain in zebrafish.
Journal J. Neurosci.
Abstract The optic tectum is a visual center in vertebrates. It receives topographically ordered visual inputs from the retina in the superficial layers and then sends motor outputs from the deeper layers to the premotor reticulospinal system in the hindbrain. Although the topographic patterns of the retinotectal projection are well known, it is not yet well understood how tectal efferents in the tectobulbar tract project to the hindbrain. The retinotectal and the tectobulbar projections were visualized in a zebrafish stable transgenic line Tg(brn3a-hsp70:GFP). Using a single-neuron labeling system in combination with the cre/loxP and Gal4/UAS systems, we showed that the tectal neurons that projected to rhombomeres 2 and 6 were distributed with distinctive patterns along the anterior-posterior axis. Furthermore, we found that ephrinB2a was critically involved in increasing the probability of neurons projecting to rhombomere 2 through a reverse signaling mechanism. These results may provide a neuroanatomical and molecular basis for the motor command map in the tectum.
Volume 27(20)
Pages 5271-9
Published 2007-5-16
DOI 10.1523/JNEUROSCI.0883-07.2007
PII 27/20/5271
PMID 17507550
MeSH Animals Animals, Genetically Modified Ephrin-B2 / genetics Ephrin-B2 / physiology* Mosaicism* / embryology Neurons / cytology Neurons / physiology* Rhombencephalon / cytology Rhombencephalon / embryology Rhombencephalon / physiology* Signal Transduction / genetics Superior Colliculi / cytology Superior Colliculi / embryology Superior Colliculi / physiology* Visual Pathways / cytology Visual Pathways / embryology Visual Pathways / physiopathology Zebrafish Zebrafish Proteins / biosynthesis Zebrafish Proteins / genetics*
IF 6.074
Times Cited 54
Zebrafish rw0110b (Tg (brn3a-hsp70:GFP))?