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...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Lo Nostro, F.L., Antoneli, F.N., Quagio-Grassiotto, I., Guerrero, G.A.
Formato:	JOUR
Materias:	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 Synbranchus marmoratus Teleostei
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00408166_v36_n4_p221_LoNostro
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00408166_v36_n4_p221_LoNostro
record_format	dspace
spelling	todo:paper_00408166_v36_n4_p221_LoNostro2023-10-03T14:51:12Z Testicular interstitial cells, and steroidogenic detection in the protogynous fish, Synbranchus marmoratus (Teleostei, Synbranchidae) Lo Nostro, F.L. Antoneli, F.N. Quagio-Grassiotto, I. Guerrero, G.A. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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, F.L. Antoneli, F.N. Quagio-Grassiotto, I. Guerrero, G.A. 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.
format	JOUR
author	Lo Nostro, F.L. Antoneli, F.N. Quagio-Grassiotto, I. Guerrero, G.A.
author_facet	Lo Nostro, F.L. Antoneli, F.N. Quagio-Grassiotto, I. Guerrero, G.A.
author_sort	Lo Nostro, F.L.
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)
url	http://hdl.handle.net/20.500.12110/paper_00408166_v36_n4_p221_LoNostro
work_keys_str_mv	AT lonostrofl testicularinterstitialcellsandsteroidogenicdetectionintheprotogynousfishsynbranchusmarmoratusteleosteisynbranchidae AT antonelifn testicularinterstitialcellsandsteroidogenicdetectionintheprotogynousfishsynbranchusmarmoratusteleosteisynbranchidae AT quagiograssiottoi testicularinterstitialcellsandsteroidogenicdetectionintheprotogynousfishsynbranchusmarmoratusteleosteisynbranchidae AT guerreroga testicularinterstitialcellsandsteroidogenicdetectionintheprotogynousfishsynbranchusmarmoratusteleosteisynbranchidae
_version_	1807315584262602752

Testicular interstitial cells, and steroidogenic detection in the protogynous fish, Synbranchus marmoratus (Teleostei, Synbranchidae)

Ejemplares similares