INVESTIGADORES
LO NOSTRO Fabiana Laura
artículos
Título:
Testicular interstitial cells, and steroidogenic detection in the protogynous fish, Synbranchus marmoratus (Teleostei, Synbranchidae).
Autor/es:
F. LO NOSTRO; F. ANTONELI; I. QUAGIO GRASSIOTTO; G. GUERRERO
Revista:
TISSUE & CELL
Editorial:
Elsevier
Referencias:
Lugar: Siena, Italia; Año: 2004 vol. 36 p. 221 - 231
ISSN:
0040-8166
Resumen:
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 3-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.
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.
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.
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 3-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.
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.
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.
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 3-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.
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.
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.
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 3-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.
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.
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.
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 3-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.
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.
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.
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 3-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.
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.
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.
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 3-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.
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.
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.
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 3-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.
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.
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.
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 3-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.
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.
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.