The Adrenocortical Homolog of the Beluga Sturgeon Huso Huso (Chondrostei)
In the beluga sturgeon Huso huso we studied the cell structure and the presence of glycogen in the corticosteroidogenic tissue. In chondrosteans this tissue is the main component of the yellow bodies spread throughout the length of the kidney region and constitutes the adrenocortical homolog of the...
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Online Access: | http://hdl.handle.net/11573/618707 https://doi.org/10.1134/S0032945214060034 |
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ftunivromairis:oai:iris.uniroma1.it:11573/618707 2024-04-21T07:58:28+00:00 The Adrenocortical Homolog of the Beluga Sturgeon Huso Huso (Chondrostei) CHIMENTI, Claudio GALLO, Valentina Patrizia CIVININI, Annalena Chimenti, Claudio Gallo, Valentina Patrizia Civinini, Annalena 2014 STAMPA http://hdl.handle.net/11573/618707 https://doi.org/10.1134/S0032945214060034 eng eng volume:54 issue:9 firstpage:730 lastpage:741 journal:JOURNAL OF ICHTHYOLOGY http://hdl.handle.net/11573/618707 doi:10.1134/S0032945214060034 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84920104655 info:eu-repo/semantics/article 2014 ftunivromairis https://doi.org/10.1134/S0032945214060034 2024-03-28T02:14:54Z In the beluga sturgeon Huso huso we studied the cell structure and the presence of glycogen in the corticosteroidogenic tissue. In chondrosteans this tissue is the main component of the yellow bodies spread throughout the length of the kidney region and constitutes the adrenocortical homolog of the adrenal gland of higher vertebrates. This study showed that these cells are present according to four main cyclic phases in relation to different moments of their secretory activity. Moreover, differently from teleosts, they contain abundant lipidic material stored in droplets. At the electron microscopic observation the lipid content of the droplets may appear highly osmiophilic or lightly osmiophilic, or electron lucent if extracted by the fixation. According to the cell characteristics, three main zones may be considered: a peripheral zone in which the lipid droplets appear very electron dense, an intermediate zone with medium dense droplets, and a central zone with electron lucent droplets. In this latter cell, degenerative processes are frequent, while in the other zones the images suggest dedifferention processes. The three zones have not precise outlines, but there is a gradual and centripetal cell transformation from peripheral zone cells to intermediate zone cells and from these latter to central zone cells. While new cells differentiate in the most external band of the peripheral zone, in the central zone the cells degenerate. We suggested that the high osmiophily in the peripheral lipid droplets could be due to a high unsaturation of triglycerides and cholesterol esters. A progressive hydrolysis of fatty acids can modify the stored lipid content and its electron density. The β–oxidation of the fatty acids could provide an energy source and the steroidogenic cells could so also accomplish an adipocytelike role. Even if rarely, contacts of the peripheral cells with chromaffin cells are present, indicating a possible paracrine action of the catechola mines on the cortisol secretion, as proved in other ... Article in Journal/Newspaper Beluga Beluga* Sapienza Università di Roma: CINECA IRIS Journal of Ichthyology 54 9 730 741 |
institution |
Open Polar |
collection |
Sapienza Università di Roma: CINECA IRIS |
op_collection_id |
ftunivromairis |
language |
English |
description |
In the beluga sturgeon Huso huso we studied the cell structure and the presence of glycogen in the corticosteroidogenic tissue. In chondrosteans this tissue is the main component of the yellow bodies spread throughout the length of the kidney region and constitutes the adrenocortical homolog of the adrenal gland of higher vertebrates. This study showed that these cells are present according to four main cyclic phases in relation to different moments of their secretory activity. Moreover, differently from teleosts, they contain abundant lipidic material stored in droplets. At the electron microscopic observation the lipid content of the droplets may appear highly osmiophilic or lightly osmiophilic, or electron lucent if extracted by the fixation. According to the cell characteristics, three main zones may be considered: a peripheral zone in which the lipid droplets appear very electron dense, an intermediate zone with medium dense droplets, and a central zone with electron lucent droplets. In this latter cell, degenerative processes are frequent, while in the other zones the images suggest dedifferention processes. The three zones have not precise outlines, but there is a gradual and centripetal cell transformation from peripheral zone cells to intermediate zone cells and from these latter to central zone cells. While new cells differentiate in the most external band of the peripheral zone, in the central zone the cells degenerate. We suggested that the high osmiophily in the peripheral lipid droplets could be due to a high unsaturation of triglycerides and cholesterol esters. A progressive hydrolysis of fatty acids can modify the stored lipid content and its electron density. The β–oxidation of the fatty acids could provide an energy source and the steroidogenic cells could so also accomplish an adipocytelike role. Even if rarely, contacts of the peripheral cells with chromaffin cells are present, indicating a possible paracrine action of the catechola mines on the cortisol secretion, as proved in other ... |
author2 |
Chimenti, Claudio Gallo, Valentina Patrizia Civinini, Annalena |
format |
Article in Journal/Newspaper |
author |
CHIMENTI, Claudio GALLO, Valentina Patrizia CIVININI, Annalena |
spellingShingle |
CHIMENTI, Claudio GALLO, Valentina Patrizia CIVININI, Annalena The Adrenocortical Homolog of the Beluga Sturgeon Huso Huso (Chondrostei) |
author_facet |
CHIMENTI, Claudio GALLO, Valentina Patrizia CIVININI, Annalena |
author_sort |
CHIMENTI, Claudio |
title |
The Adrenocortical Homolog of the Beluga Sturgeon Huso Huso (Chondrostei) |
title_short |
The Adrenocortical Homolog of the Beluga Sturgeon Huso Huso (Chondrostei) |
title_full |
The Adrenocortical Homolog of the Beluga Sturgeon Huso Huso (Chondrostei) |
title_fullStr |
The Adrenocortical Homolog of the Beluga Sturgeon Huso Huso (Chondrostei) |
title_full_unstemmed |
The Adrenocortical Homolog of the Beluga Sturgeon Huso Huso (Chondrostei) |
title_sort |
adrenocortical homolog of the beluga sturgeon huso huso (chondrostei) |
publishDate |
2014 |
url |
http://hdl.handle.net/11573/618707 https://doi.org/10.1134/S0032945214060034 |
genre |
Beluga Beluga* |
genre_facet |
Beluga Beluga* |
op_relation |
volume:54 issue:9 firstpage:730 lastpage:741 journal:JOURNAL OF ICHTHYOLOGY http://hdl.handle.net/11573/618707 doi:10.1134/S0032945214060034 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84920104655 |
op_doi |
https://doi.org/10.1134/S0032945214060034 |
container_title |
Journal of Ichthyology |
container_volume |
54 |
container_issue |
9 |
container_start_page |
730 |
op_container_end_page |
741 |
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1796939598662729728 |