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Expression pattern for unc5b, an axon guidance gene in embryonic zebrafish development. Gene Expr 2007;13(6):321-7



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Branching processes such as nerves and vessels share molecular mechanisms of path determination. Our study focuses on unc5b, a member of the unc5 axon guidance gene family. Here, we have cloned the full-length zebrafish ortholog of unc5b, mapped its chromosome location in the zebrafish genome, and compared its expression patterns to robo4, another axon guidance family member. In situ show that unc5b is expressed predominantly in sensory structures such as the eye, ear, and brain. Both unc5b and robo4 show robust expression in all three compartments of the embryonic brain, namely forebrain, midbrain, and hindbrain. In particular, the hindbrain rhombomere expression displays interesting patterns in that robo4 is expressed in medial rhombomere cell clusters when compared to unc5b expressed in lateral rhombomere clusters. A similar medial-lateral theme is observed in other neural structures such as the neural tube. Our expression analysis provides a starting point for studying the role of axon guidance genes in embryonic hindbrain patterning.

Author List

Kaur S, Abu-Asab MS, Singla S, Yeo SY, Ramchandran R


Ramani Ramchandran PhD Professor in the Pediatrics department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Amino Acid Sequence
Body Patterning
Cloning, Molecular
Embryo, Nonmammalian
Embryonic Development
Gene Expression Regulation, Developmental
Molecular Sequence Data
Receptors, Cell Surface
Sequence Homology, Amino Acid
Zebrafish Proteins
jenkins-FCD Prod-484 8aa07fc50b7f6d102f3dda2f4c7056ff84294d1d