The taste system of the channel catfish: from biophysics to behavior

Caprio, John; Brand, Joseph G.; Teeter, John H.; Valentinčič, Tine; Kalinoski, D. Lynn; Kohbara, Jun; Kobayashi, Takashi; Wegert, Sandra

doi:10.1016/0166-2236(93)90152-c

Cited by 123 publications

(52 citation statements)

References 39 publications

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“…Many fish do not prefer sugars, although they hesitate to avoid them positively (Kasumyan and Doving, 2003). Recordings from fish facial nerves innervating the taste cells of the maxillary and nasal barbels, flank, rostral palate, and lips have revealed that the facial taste system is highly responsive to amino, nucleic, and organic acids (Caprio, 1975;Funakoshi et al, 1981;Caprio et al, 1993). Goldfish (Carassius auratus), although biting diets containing quinine alone, reject them at last, but the fish do not avert a quinine-containing diet if this contains L-Ala together (Lamb and Finger, 1995).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Ligands for Fish Taste Receptors

Oike¹,

Nagai²,

Furuyama³

et al. 2007

J. Neurosci.

149

157

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Recent progress in the molecular biology of taste reception has revealed that in mammals, the heteromeric receptors T1R1/3 and T1R2/3 respond to amino acids and sweeteners, respectively, whereas T2Rs are receptors for bitter tastants. Similar taste receptors have also been characterized in fish, but their ligands have not been identified yet. In the present study, we conducted a series of experiments to identify the fish taste receptor ligands. Facial nerve recordings in zebrafish (Danio rerio) demonstrated that the fish perceived amino acids and even denatonium, which is a representative of aversive bitter compounds for mammals and Drosophila. Calcium imaging analysis of T1Rs in zebrafish and medaka fish (Oryzias latipes) using an HEK293T heterologous expression system revealed that both T1R1/3 and a series of T1R2/3 responded to amino acids but not to sugars. A triple-labeling, in situ hybridization analysis demonstrated that cells expressing T1R1/3 and T1R2/3s exist in PLC␤2-expressing taste bud cells of medaka fish. Functional analysis using T2Rs showed that zfT2R5 and mfT2R1 responded to denatonium. Behavior observations confirmed that zebrafish prefer amino acids and avoid denatonium. These results suggest that, although there may be some fish-specific way of discriminating ligands, vertebrates could have a conserved gustatory mechanism by which T1Rs and T2Rs respond to attractive and aversive tastants, respectively.

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Section: Introductionmentioning

confidence: 99%

Characterization of Ligands for Fish Taste Receptors

Oike¹,

Nagai²,

Furuyama³

et al. 2007

J. Neurosci.

149

157

View full text Add to dashboard Cite

show abstract

“…For example, bats use a highly developed audiovocal system to hunt insects via echolocation (Galambos, 1942;Griffin, 1958), toads have a visual system specialized for detecting worm-like movements (Ewert, 1970), pit vipers use infrared receptors for tracking their prey (Molenaar, 1974;Gruberg et al, 1979), and electric fish use electroreception for detecting and locating food in their environment (Bullock, 1982). Catfish have a highly sensitive, large gustatory sense that plays a critical role in the search for food in muddy waters (Herrick, 1901(Herrick, , 1904(Herrick, , 1905Bardach et al, 1967;Atema, 1971;Caprio et al, 1993;Valentincic and Caprio 1993). Catfish can detect concentration differences between their maxillary barbels and make turning movements appropriate to locate food (Johnsen and Teeter, 1980).…”

mentioning

confidence: 99%

Parallel Medullary Gustatospinal Pathways In a Catfish: Possible Neural Substrates for Taste-Mediated Food Search

Finger

1997

J. Neurosci.

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Taste and tactile fibers in the facial nerve of catfish innervate extraoral taste buds and terminate somatotopically in the facial lobe (FL)-a medullary structure crucial for gustatory-mediated food search. The present study was performed to determine the neural linkages between the gustatory input and the spinal motor output. Spinal injections of horseradish peroxidase (HRP) label spinopetal cells in the octaval nuclei, the nucleus of the medial longitudinal fasciculus, and reticulospinal neurons (Rsps) in the brainstem medial reticular formation (RF), including the Mauthner cell. A somatotopically organized, direct faciospinal system originating from superficial cells scattered in the lateral lobule of the facial lobe (ll) is also labeled. (1) a topographically organized direct faciospinal pathway, and (2) an indirect facioreticulospinal pathway in which reticular neurons process and integrate gustatory information before influencing spinal circuitry for motor control during food search.

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“…Nonetheless, as a consequence, taste buds, which are considered homologous organs, form in both endodermal and ectodermal epithelia. This is particularly interesting as several groups of bony fish possess superficial taste buds, in addition to taste buds within the oral cavity, including zebrafish, which have taste buds distributed on the head (Hansen et al, 2002), and catfish, which are covered with taste buds over their entire surface from head to tail (Atema, 1971;Caprio et al, 1993;Landacre, 1907). These appear to have evolved independently (Northcutt, 2004), so it is unclear if the mechanisms governing the development of these external taste buds are similar to those governing the development of oral taste buds, the latter being common to all vertebrates including zebrafish and catfish.…”

Section: The Regulation Of Taste Bud Developmentmentioning

confidence: 99%

Progress and renewal in gustation: new insights into taste bud development

2015

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The sense of taste, or gustation, is mediated by taste buds, which are housed in specialized taste papillae found in a stereotyped pattern on the surface of the tongue. Each bud, regardless of its location, is a collection of ∼100 cells that belong to at least five different functional classes, which transduce sweet, bitter, salt, sour and umami (the taste of glutamate) signals. Taste receptor cells harbor functional similarities to neurons but, like epithelial cells, are rapidly and continuously renewed throughout adult life. Here, I review recent advances in our understanding of how the pattern of taste buds is established in embryos and discuss the cellular and molecular mechanisms governing taste cell turnover. I also highlight how these findings aid our understanding of how and why many cancer therapies result in taste dysfunction.

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The taste system of the channel catfish: from biophysics to behavior

Cited by 123 publications

References 39 publications

Characterization of Ligands for Fish Taste Receptors

Characterization of Ligands for Fish Taste Receptors

Parallel Medullary Gustatospinal Pathways In a Catfish: Possible Neural Substrates for Taste-Mediated Food Search

Progress and renewal in gustation: new insights into taste bud development

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