Etude ultrastructurale de la région apicale des cellules de l'épithélium olfactif de Protopterus annectens owen (dipneustes)

Derivot, Jacques H.; Mattei, Xavier; Godet, R; Dupé, M

doi:10.1016/s0022-5320(79)80062-3

Cited by 17 publications

(7 citation statements)

References 12 publications

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“…This assumption is based on the fact that Protopterus, the African lungfish, and Neoceratodus, the Australian lungfish, vary greatly in the characteristics of their olfactory epithelium. The olfactory epithelium of Protopterus contains numerous microvillous as well as ciliated receptor cells [Derivot et al, 1979], but Neoceratodus has only a few ciliated receptor cells [Hansen et al, 1994] that escaped detection in an earlier study by Theisen [1972]. Similarly, we might have overlooked crypt cells if few are present or are restricted to a small area of epithelium.…”

Section: Discussionmentioning

confidence: 86%

Phyletic Distribution of Crypt-Type Olfactory Receptor Neurons in Fishes

2000

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The olfactory epithelium of teleost fishes contains ciliated and microvillous olfactory receptor neurons intermingled with supporting cells. Recently the crypt cell, a third type of olfactory receptor neuron (ORN), was described for two ostariophysans. This type of ORN bears apical microvilli as well as occult cilia extending into a crypt at the apex of the cell. The present study used scanning and transmission electron-microscopic methods to examine how widespread this cell type is in other groups of fish. We investigated the olfactory epithelia of 18 species, freshwater and marine, including various actinopterygian fish as well as 2 species of lungfishes belonging to the sarcopterygians. Crypt cells were detected in 13 species of actinopterygian fish, but in none of the sarcopterygian lungfishes. Crypt cells are present in basic as well as in highly derived actinopterygians. We conclude that crypt cells are a common feature of actinopterygian fish.

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Section: Discussionmentioning

confidence: 86%

Phyletic Distribution of Crypt-Type Olfactory Receptor Neurons in Fishes

2000

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“…Although the ultrastructure of the OE has previously been reported in several species of lungfish (Theisen,1972; Derivot et al,1979; Hansen et al,1994), the ultrastructure of the recess epithelium has not been previously described. In accordance with the earlier reports by Derivot et al (1979) and Hansen et al (1994), the ultrastructure of the lamellar OE shared characteristics with the OE of ordinary teleosts (Hansen and Zielinski,2005). On the other hand, our studies have shown that the ultrastructure of the recess epithelium is considerably different from that of the lamellar OE in that the recess epithelium contained microvillous sensory cells but not ciliated sensory cells.…”

Section: Discussionmentioning

confidence: 96%

Histological and Ultrastructural Characteristics of the Primordial Vomeronasal Organ in Lungfish

Nakamuta

Taniguchi

et al. 2012

The Anatomical Record

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Many vertebrates have two anatomically distinct olfactory organs-the olfactory epithelium and the vomeronasal organ-to detect chemicals such as general odorants and pheromones in their environment. The vomeronasal organ is not present in fish but is present in vertebrates of a higher order than amphibians. Among all extant fishes, the lungfish is considered to be genetically and phylogenetically closest to tetrapods. In this study, we examined the olfactory organs of African lungfish, Protopterus annectens, by lectin histochemistry, immunohistochemistry, and transmission electron microscopy. Two types of sensory epithelia were identified in the olfactory organ-the olfactory epithelium covering the surface of lamellae and the sensory epithelium lining the recesses both at the base of lamellae and in the wall of the nasal sac-and designated here as the lamellar olfactory epithelium and the recess epithelium, respectively. Based on analysis of G-protein expression and ultrastructure, the lamellar olfactory epithelium resembled the olfactory epithelium of ordinary teleosts and the recess epithelium resembled the vomeronasal organ of tetrapods. Furthermore, lectin histochemistry demonstrated that the axons from the recess epithelium converge and project to the ventrolateral part of the olfactory bulb, suggesting that lungfish possess a region homologous to the accessory olfactory bulb of tetrapods. Based on these results, it seems appropriate to refer to the recess epithelium as ''a primordium of the vomeronasal organ.'' This study may provide important clues to elucidate how the vomeronasal organ emerged during the evolution of vertebrates. Anat Rec, 295:481-491, 2012. V C 2012 Wiley Periodicals, Inc.Key words: lungfish; vomeronasal organ; olfactory organ; ultrastructure; immunohistochemistry; lectin histochemistryMany vertebrates have two distinct olfactory organsthe olfactory epithelium (OE) and the vomeronasal organ (VNO)-for detecting chemicals such as general odorants and pheromones in their environment. Although it was previously believed that the OE detects general odorants and the VNO, pheromones, this view Abbreviations used: OB ¼ olfactory bulb; OE ¼ olfactory epithelium; ORC ¼ olfactory receptor cell; TEM ¼ transmission electron microscopy; TRITC ¼ tetramethyl rhodamine isothiocyanate; VNO ¼ vomeronasal organ.

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“…Lampreys (Lampetra fluviatilis, Petromyzontidae), may possess only ciliated receptor ceils (ThornhiU, 1967), and cartilaginous fishes possess only microvillar receptor cells (Theisen et al, 1986;Zeiske et al, 1987Zeiske et al, , 1992. Only microvillar receptor cells are present in Australian lungfish (Neoceratodus forsteri, Ceratodontidae) (Theisen, 1972), while only ciliated receptor cells are found in African lungfish (Neoceratodus forsteri, Ceratodontidae) (Theisen,i972), while only ciliated receptor ceils are found in African lungfish (Protopterus annectens, Protopteridae) (Derivot et al, 1979). Thus limited data indicate that no clear distribution pattern of olfactory receptor cell types emerges across fish species.…”

Section: Peripheral Olfactory Organmentioning

confidence: 99%