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Transmitter-specific subsets of sensory elements in the prosobranch osphradium.

Nezlin, Leonid P; Elofsson, Rolf LU and Sakharov, Dmitri A (1994) In Biological Bulletin 187. p.174-184
Abstract
The osphradium is a putative chemosensory organ of aquatic molluscs. Previously, we identified two distinct types of primary sensory neurons in the osphradial ganglion of freshwater pulmonates, one immunoreactive to leucine-enkephalin (LEnk-ir) and another to FMRFamide (FMRFa-ir). In addition, NADPH diaphorase (NADPHd)-positive elements apparently producing nitric oxide (NO) were demonstrated in the organ. In the present study, prosobranch molluscs, which have retained the osphradial sensory neurons within the epithelium, were studied. Both types of peptidergic neurons, as well as NADPHd-positive cells, were found within the epithelium or in a basiepithelial position in the relatively simple osphradium of the mesogastropod Littorina... (More)
The osphradium is a putative chemosensory organ of aquatic molluscs. Previously, we identified two distinct types of primary sensory neurons in the osphradial ganglion of freshwater pulmonates, one immunoreactive to leucine-enkephalin (LEnk-ir) and another to FMRFamide (FMRFa-ir). In addition, NADPH diaphorase (NADPHd)-positive elements apparently producing nitric oxide (NO) were demonstrated in the organ. In the present study, prosobranch molluscs, which have retained the osphradial sensory neurons within the epithelium, were studied. Both types of peptidergic neurons, as well as NADPHd-positive cells, were found within the epithelium or in a basiepithelial position in the relatively simple osphradium of the mesogastropod Littorina littorea and in the complex, bipectinate osphradium of the neogastropod Buccinum undatum. Similar evidence was also obtained for another mesogastropod, Ampullarius sp. Transmitter-specific sensory cell types like those discovered in the osphradium are also present as single neuroepithelial cells in other organs of the mantle complex in prosobranchs and in the pelecypod Anodonta cygnea. We suggest that evolutionarily conservative, transmitter-specific types of epithelial and neuroepithelial sensory cells predated the osphradium, which developed as the site of their concentration, while retaining characteristic subsets of sensory neurons. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Biological Bulletin
volume
187
pages
174 - 184
publisher
Marine Biological Laboratory
external identifiers
  • Scopus:0028323727
ISSN
0006-3185
DOI
10.2307/1542240
language
English
LU publication?
yes
id
0655d3fc-2fcf-41b3-904e-3ed66dd44f3d
date added to LUP
2016-11-03 18:58:24
date last changed
2016-11-21 14:04:13
@misc{0655d3fc-2fcf-41b3-904e-3ed66dd44f3d,
  abstract     = {The osphradium is a putative chemosensory organ of aquatic molluscs. Previously, we identified two distinct types of primary sensory neurons in the osphradial ganglion of freshwater pulmonates, one immunoreactive to leucine-enkephalin (LEnk-ir) and another to FMRFamide (FMRFa-ir). In addition, NADPH diaphorase (NADPHd)-positive elements apparently producing nitric oxide (NO) were demonstrated in the organ. In the present study, prosobranch molluscs, which have retained the osphradial sensory neurons within the epithelium, were studied. Both types of peptidergic neurons, as well as NADPHd-positive cells, were found within the epithelium or in a basiepithelial position in the relatively simple osphradium of the mesogastropod Littorina littorea and in the complex, bipectinate osphradium of the neogastropod Buccinum undatum. Similar evidence was also obtained for another mesogastropod, Ampullarius sp. Transmitter-specific sensory cell types like those discovered in the osphradium are also present as single neuroepithelial cells in other organs of the mantle complex in prosobranchs and in the pelecypod Anodonta cygnea. We suggest that evolutionarily conservative, transmitter-specific types of epithelial and neuroepithelial sensory cells predated the osphradium, which developed as the site of their concentration, while retaining characteristic subsets of sensory neurons.},
  author       = {Nezlin, Leonid P and Elofsson, Rolf and Sakharov, Dmitri A},
  issn         = {0006-3185},
  language     = {eng},
  pages        = {174--184},
  publisher    = {ARRAY(0xc903f78)},
  series       = {Biological Bulletin},
  title        = {Transmitter-specific subsets of sensory elements in the prosobranch osphradium.},
  url          = {http://dx.doi.org/10.2307/1542240},
  volume       = {187},
  year         = {1994},
}