Olfactory Sensory Neurons in the Sea Lamprey Display Polymorphisms.
From: Department of Biological Sciences, University of Windsor, 401 Sunset Ave, Windsor, Ont., Canada N9B 3P4.
Neuroscience letters
- Publish Date: Mar 2007
- ISSN: 0304-3940
- Volume: 414
- Issue: 3
- Pages: 277-81
- Medium: Print
- Language: English
- Citation (JAMA): Laframboise A J, Ren X, Chang S, et al. Olfactory Sensory Neurons in the Sea Lamprey Display Polymorphisms.. Neurosci. Lett. Mar 2007;414:277-81
Abstract
The sea lamprey (Petromyzon marinus) is an ancient jawless fish phyletically removed from modern (teleost) fishes. It is an excellent organism in the study of olfaction due to its accessible olfactory pathway, which is susceptible to manipulation, and its important location in the evolution of vertebrates. There are many similarities in the olfactory systems of all fishes, and they also share characteristics with the olfactory system of mammals. Teleost fishes lack the distinctive vomeronasal organ of mammals; rather all odours are processed initially by olfactory sensory neurons (OSNs) of three morphotypes within the olfactory epithelium. We sought to identify olfactory sensory neuron polymorphisms in the sea lamprey. Using retrograde tracing with dyes injected into the olfactory bulb, we identified three morphotypes which are highly similar to those found in teleosts. This study provides the first evidence of morphotypes in the sea lamprey peripheral olfactory organ, and indicates that olfactory sensory neuron polymorphism may be a trait highly conserved throughout vertebrate evolution.
Mesh Headings (Keywords): Animals, Cell Shape, Fluorescent Dyes, Larva, Metamorphosis, Biological, Neurites, Olfactory Mucosa, Olfactory Pathways, Olfactory Receptor Neurons, Petromyzon, Smell, Species Specificity
Check for Full Text / PubMed Unique Identifier (PMID): 17254708
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