Journal ArticleDOI
Seasonal variations in olfactory sensory neurons--fish sensitivity to sex pheromones explained?
TLDR
It is demonstrated that the number of crypt cells in the olfactory epithelium of the crucian carp varies dramatically throughout the year, which may explain previous studies demonstrating a relationship between circulating androgen and Olfactory sensitivity to sex pheromones.Abstract:
Olfactory sensory neurons of vertebrates regenerate throughout the life of the animal. In fishes, crypt cells are a type of olfactory sensory neurons thought to respond to sex pheromones. Here, we demonstrate that the number of crypt cells in the olfactory epithelium of the crucian carp varies dramatically throughout the year. During winter, few crypt cells are observed at any location within the sensory epithelium. In spring, the majority of crypt cells are located deep in the epithelium not yet exposed to the environment. However, during the summer spawning season, crypt cells are positioned at the epithelial surface. These findings may explain previous studies demonstrating a relationship between circulating androgen and olfactory sensitivity to sex pheromones.read more
Citations
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Journal ArticleDOI
Environmental gestagens activate fathead minnow (Pimephales promelas) nuclear progesterone and androgen receptors in vitro.
Laura E. Ellestad,Mary C. Cardon,Ian G. Chambers,Jennifer L. Farmer,Phillip C. Hartig,Kyle Stevens,Daniel L. Villeneuve,Vickie S. Wilson,Edward F. Orlando +8 more
TL;DR: The first mechanistic evidence that environmental gestagens can activate FHM nPR and AR is presented, suggesting that gestagons may affect phenotype through nPR- and AR-mediated pathways.
Journal ArticleDOI
The elusive crypt olfactory receptor neuron: evidence for its stimulation by amino acids and cAMP pathway agonists.
TL;DR: Data suggest the presence of a cAMP transduction pathway, which might transduce odorants such as amino acids, in crypt ORNs, which were immunoreactive to an antiserum against adenylate cyclase III.
Journal ArticleDOI
Crypt cells are involved in kin recognition in larval zebrafish
TL;DR: Zebrafish larvae imprint on visual and olfactory kin cues at day 5 and 6 postfertilization, respectively, resulting in kin recognition later in life, and this work provides the first direct evidence that crypt cells, and likely a subpopulation of microvillous OSNs, but not ciliated OSN, play a role in detecting a kin odor related signal.
Journal ArticleDOI
Odorant tuning of olfactory crypt cells from juvenile and adult rainbow trout.
TL;DR: The results of the present study support an involvement of olfactory crypt cells in reproduction-related Olfactory signaling in fishes.
Journal ArticleDOI
Methyltestosterone-Induced Changes in Electro-olfactogram Responses and Courtship Behaviors of Cyprinids
TL;DR: Adding 17alpha-methyltestosterone to aquaria containing juveniles of 4 cyprinid species concluded that androgen-induced increase in olfactory responsiveness to pheromonal prostaglandins is common among the family Cyprinidae.
References
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Journal ArticleDOI
Mechanisms of olfactory discrimination : Converging evidence for common principles across phyla
TL;DR: The findings support the hypothesis that olfactory transduction and neural processing in the peripheral Olfactory pathway involve basic mechanisms that are universal across most species in most phyla.
Journal ArticleDOI
Neurogenesis and neuron regeneration in the olfactory system of mammals. I. Morphological aspects of differentiation and structural organization of the olfactory sensory neurons
TL;DR: The morphological stages of maturation and ageing of this exceptional neuron have been described both at light and electron microscopical levels and the neural elements have been classified as: basal cells proper, globose basal cells, and neurons.
Journal ArticleDOI
Neural regeneration and the peripheral olfactory system
TL;DR: Cell renewal in the epithelium is directed to replace neurons when they die in normal animals and does so at an accelerated pace after damage to the olfactory nerve, and multiple growth factors are likely to be central in regulating choice points in epitheliopoiesis.
Journal ArticleDOI
Dynamics of cell populations in the olfactory epithelium
TL;DR: The olfactory organ-unlike most receptor sheet-must be directly exposed to airborne chemicals, but this requirement also mates vulnerability to bacterial and viral invasion, to the mechanical impact of the respiratory airstream, and to the toxic effects of environmental pollutants.
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