On the presence and localization of glycogen accumulations inside coronet cells of the saccus vasculosus of the dogfish (Scylliorhinus caniculus)

Kamer, J. C. van de; Wilschut, Ina J. C.; Heussen, Astrid M. A.

doi:10.1007/bf00306699

Cited by 5 publications

(1 citation statement)

References 10 publications

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“…These results are consistent with observations of glycine immunoreactivity in the coronet cells of the Siberian sturgeon (Adrio et al, ). Coronet cells have been implicated in diverse functions such as ion transport from the cerebrospinal fluid (CSF) to the blood, release of glucose into the CSF, or synthesis of glycoproteins, but their functions have not been firmly established (van de Kamer et al, ; Jansen et al, ; Sueiro et al, ). The functional significance of the glycine immunoreactivity observed in these cells is not known.…”

Section: Discussionmentioning

confidence: 99%

Glycine‐immunoreactive neurons in the brain of a shark (Scyliorhinus canicula L.)

Anadón

Rodríguez‐Moldes

Adrio

2013

J of Comparative Neurology

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The glycinergic cell populations in the brain of the lesser spotted dogfish were studied by a glycine immunofluorescence method. Numerous glycine-immunoreactive (Gly-ir) neurons were observed in different brain nuclei. In the telencephalon, Gly-ir cells were observed in the olfactory bulb, telencephalic hemispheres, and preoptic region. In the hypothalamus, cerebrospinal fluid-contacting Gly-ir neurons were observed in the lateral and posterior recess nuclei. Coronet cells of the saccus vasculosus were Gly-ir. In the diencephalon, Gly-ir neurons were observed in the prethalamus and pretectum. In the midbrain, both the optic tectum and lateral mesencephalic nucleus contained numerous Gly-ir neurons. In the cerebellum, many Golgi cells were Gly-ir. In the rhombencephalon, Gly-ir cells were observed in the medial and ventral octavolateral nuclei, vagal lobe, visceromotor nuclei, and reticular formation, including the inferior raphe nucleus. In the spinal cord, some neurons of the marginal nucleus and some cells of the dorsal and ventral horns were Gly-ir. Comparison of dogfish Gly-ir cell populations with those reported for the sea lamprey, Siberian sturgeon, and zebrafish revealed some shared features but also notable differences. For example, Gly-ir cells were observed in the dogfish cerebellum, unlike the case in the Siberian sturgeon and zebrafish, whereas the absence of Gly-ir neurons in the isthmus is shared by all these species, except for lampreys. Gly-ir populations in the dogfish hypothalamus and telencephalon are notable in comparison with those of the other jawed vertebrates investigated to date. Together, these results reveal a complex and divergent evolution of glycinergic systems in the major groups of fishes.

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Section: Discussionmentioning

confidence: 99%