Testicular interstitial cells, and steroidogenic detection in the protogynous fish, Synbranchus marmoratus (Teleostei, Synbranchidae)
The swamp eel, Synbranchus marmoratus, is a freshwater protogynic diandric species. Primary males develop directly as males while secondary males arise from the sex reversal of females. Fishes from Argentine and Brazil inland waters were collected, examined and compared for this study. In order to c...
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2004
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00408166_v36_n4_p221_LoNostro http://hdl.handle.net/20.500.12110/paper_00408166_v36_n4_p221_LoNostro |
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paper:paper_00408166_v36_n4_p221_LoNostro2023-06-08T15:04:41Z Testicular interstitial cells, and steroidogenic detection in the protogynous fish, Synbranchus marmoratus (Teleostei, Synbranchidae) Lo Nostro, Fabiana Laura Guerrero, Graciela Alicia Blood cells Interstitial compartment Leydig cells Protogynous Sex reversal Synbranchiformes collagen fiber animal cell animal tissue Argentina article autumn blood cell Brazil cell compartmentalization cell damage cell structure controlled study cytoplasm electron microscopy enzyme histochemistry fish granulocyte interstitium Leydig cell light macrophage male maturation nonhuman phagocytosis sex transformation spawning steroidogenesis swamp testis cell tissue section winter Anguilliformes Argentina (fish) Monopterus albus Myoida Myoidea Pisces Synbranchidae Synbranchiformes Synbranchus marmoratus Teleostei The swamp eel, Synbranchus marmoratus, is a freshwater protogynic diandric species. Primary males develop directly as males while secondary males arise from the sex reversal of females. Fishes from Argentine and Brazil inland waters were collected, examined and compared for this study. In order to characterize the interstitial testicular compartment, light and electron microscopy techniques and an enzyme histochemical examination for steroidogenic cells detection were used. The interstitial compartment of S. marmoratus is composed of Leydig and myoid cells, collagen fibers, blood cells, macrophages,and amyelinic nerves. At the ultrastructural level, no differences were observed in the interstitial tissue, either between specimens from the different sampling sites or between primary and secondary males. Leydig cells are present in all testes examined throughout the year. A cytoplasmatic reaction of 3β-HSD was detected only in Leydig cells during sex reversal and in both type of males, mainly during the regressed and early maturation classes (autumn and winter). Leydig cells possess the typical fine structural characteristics associated with steroidogenesis. Furthermore, in both type of males, during sex reversal and after the spawning period, the number of granulocytes and macrophages present in the testes increased, suggesting that they could be involved in phagocytosis and resorption of damaged cells. © 2004 Elsevier Ltd. All rights reserved. Fil:Lo Nostro, F.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Guerrero, G.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2004 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00408166_v36_n4_p221_LoNostro http://hdl.handle.net/20.500.12110/paper_00408166_v36_n4_p221_LoNostro |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Blood cells Interstitial compartment Leydig cells Protogynous Sex reversal Synbranchiformes collagen fiber animal cell animal tissue Argentina article autumn blood cell Brazil cell compartmentalization cell damage cell structure controlled study cytoplasm electron microscopy enzyme histochemistry fish granulocyte interstitium Leydig cell light macrophage male maturation nonhuman phagocytosis sex transformation spawning steroidogenesis swamp testis cell tissue section winter Anguilliformes Argentina (fish) Monopterus albus Myoida Myoidea Pisces Synbranchidae Synbranchiformes Synbranchus marmoratus Teleostei |
| spellingShingle |
Blood cells Interstitial compartment Leydig cells Protogynous Sex reversal Synbranchiformes collagen fiber animal cell animal tissue Argentina article autumn blood cell Brazil cell compartmentalization cell damage cell structure controlled study cytoplasm electron microscopy enzyme histochemistry fish granulocyte interstitium Leydig cell light macrophage male maturation nonhuman phagocytosis sex transformation spawning steroidogenesis swamp testis cell tissue section winter Anguilliformes Argentina (fish) Monopterus albus Myoida Myoidea Pisces Synbranchidae Synbranchiformes Synbranchus marmoratus Teleostei Lo Nostro, Fabiana Laura Guerrero, Graciela Alicia Testicular interstitial cells, and steroidogenic detection in the protogynous fish, Synbranchus marmoratus (Teleostei, Synbranchidae) |
| topic_facet |
Blood cells Interstitial compartment Leydig cells Protogynous Sex reversal Synbranchiformes collagen fiber animal cell animal tissue Argentina article autumn blood cell Brazil cell compartmentalization cell damage cell structure controlled study cytoplasm electron microscopy enzyme histochemistry fish granulocyte interstitium Leydig cell light macrophage male maturation nonhuman phagocytosis sex transformation spawning steroidogenesis swamp testis cell tissue section winter Anguilliformes Argentina (fish) Monopterus albus Myoida Myoidea Pisces Synbranchidae Synbranchiformes Synbranchus marmoratus Teleostei |
| description |
The swamp eel, Synbranchus marmoratus, is a freshwater protogynic diandric species. Primary males develop directly as males while secondary males arise from the sex reversal of females. Fishes from Argentine and Brazil inland waters were collected, examined and compared for this study. In order to characterize the interstitial testicular compartment, light and electron microscopy techniques and an enzyme histochemical examination for steroidogenic cells detection were used. The interstitial compartment of S. marmoratus is composed of Leydig and myoid cells, collagen fibers, blood cells, macrophages,and amyelinic nerves. At the ultrastructural level, no differences were observed in the interstitial tissue, either between specimens from the different sampling sites or between primary and secondary males. Leydig cells are present in all testes examined throughout the year. A cytoplasmatic reaction of 3β-HSD was detected only in Leydig cells during sex reversal and in both type of males, mainly during the regressed and early maturation classes (autumn and winter). Leydig cells possess the typical fine structural characteristics associated with steroidogenesis. Furthermore, in both type of males, during sex reversal and after the spawning period, the number of granulocytes and macrophages present in the testes increased, suggesting that they could be involved in phagocytosis and resorption of damaged cells. © 2004 Elsevier Ltd. All rights reserved. |
| author |
Lo Nostro, Fabiana Laura Guerrero, Graciela Alicia |
| author_facet |
Lo Nostro, Fabiana Laura Guerrero, Graciela Alicia |
| author_sort |
Lo Nostro, Fabiana Laura |
| title |
Testicular interstitial cells, and steroidogenic detection in the protogynous fish, Synbranchus marmoratus (Teleostei, Synbranchidae) |
| title_short |
Testicular interstitial cells, and steroidogenic detection in the protogynous fish, Synbranchus marmoratus (Teleostei, Synbranchidae) |
| title_full |
Testicular interstitial cells, and steroidogenic detection in the protogynous fish, Synbranchus marmoratus (Teleostei, Synbranchidae) |
| title_fullStr |
Testicular interstitial cells, and steroidogenic detection in the protogynous fish, Synbranchus marmoratus (Teleostei, Synbranchidae) |
| title_full_unstemmed |
Testicular interstitial cells, and steroidogenic detection in the protogynous fish, Synbranchus marmoratus (Teleostei, Synbranchidae) |
| title_sort |
testicular interstitial cells, and steroidogenic detection in the protogynous fish, synbranchus marmoratus (teleostei, synbranchidae) |
| publishDate |
2004 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00408166_v36_n4_p221_LoNostro http://hdl.handle.net/20.500.12110/paper_00408166_v36_n4_p221_LoNostro |
| work_keys_str_mv |
AT lonostrofabianalaura testicularinterstitialcellsandsteroidogenicdetectionintheprotogynousfishsynbranchusmarmoratusteleosteisynbranchidae AT guerrerogracielaalicia testicularinterstitialcellsandsteroidogenicdetectionintheprotogynousfishsynbranchusmarmoratusteleosteisynbranchidae |
| _version_ |
1768541697244921856 |