Ultrastructure of germ cells, the Leydig cells, and Sertoli cells during spermatogenesis in Boleophthalmus pectinirostris (Teleostei, Perciformes, Gobiidae)

Chung, Ee‐Yung

doi:10.1016/j.tice.2007.11.003

Cited by 33 publications

(47 citation statements)

References 32 publications

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“…Many authors have reported finding Leydig cells in clusters or groups located near blood vessels (Gresik et al 1973;Grier 1981;Chung & Chang 1995;Chung 2008). Sertoli cells have been identified in many species in which they form the lining of the seminiferous lobules (Grier 1975(Grier , 1992Grier & Abraham 1983;Chung 2008), and the cells are well known to be associated with germ cell development during spermatogenesis (Pudney 1993(Pudney , 1996Chung 2008). Additionally, Sertoli cells are involved in the ingestion of phagosomes and the remnants of residual bodies via the process of phagocytosis by the activity of various lysosomes for the degeneration of germ cells after spermiation (Chung & Chang 1995;Chung 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Sertoli cells have been identified in many species in which they form the lining of the seminiferous lobules (Grier 1975(Grier , 1992Grier & Abraham 1983;Chung 2008), and the cells are well known to be associated with germ cell development during spermatogenesis (Pudney 1993(Pudney , 1996Chung 2008). Additionally, Sertoli cells are involved in the ingestion of phagosomes and the remnants of residual bodies via the process of phagocytosis by the activity of various lysosomes for the degeneration of germ cells after spermiation (Chung & Chang 1995;Chung 2008). Above all, studies on germ cell development, Sertoli cells, and Leydig cells associated with the spermatogenesis of L. polyactis are required to understand the reproductive biology of this fish.…”

Section: Introductionmentioning

confidence: 99%

“…Above all, studies on germ cell development, Sertoli cells, and Leydig cells associated with the spermatogenesis of L. polyactis are required to understand the reproductive biology of this fish. However, the functions and activities of the Leydig cells in relation to maturation division and steroid secretion have yet to be clarified (Pudney 1993(Pudney , 1996Chung 2008). Additionally, the functions of the Sertoli cells have yet to be clearly delineated (Pudney 1993(Pudney , 1996Chung & Chang 1995;Chung 2008).…”

Section: Introductionmentioning

confidence: 99%

“…However, the functions and activities of the Leydig cells in relation to maturation division and steroid secretion have yet to be clarified (Pudney 1993(Pudney , 1996Chung 2008). Additionally, the functions of the Sertoli cells have yet to be clearly delineated (Pudney 1993(Pudney , 1996Chung & Chang 1995;Chung 2008). Spermatozoa are highly differential cells and are the most diverse of cell types.…”

Section: Introductionmentioning

confidence: 99%

“…Supplying systematic phylogeny with fresh insights, fine structural work has been performed within the family level, subfamily level, and even species level among various teleost groups (Luo et al 2011). If some characteristics obtained from sperm ultrastructure and the process of spermiogenesis are phylogenetically analyzed, the results of the ultrastructural studies on fish spermatozoa can be expected to provide important information for the elucidation of relationship patterns among several fish groups (Jamieson 1991;Mattei 1991;Chung 2008). Although several studies in the field of reproductive biology have been conducted into related topics, little information regarding the ultrastructures of spermatic germ cells and the functions of the Sertoli cells and Leydig cells associated with spermatogenesis in this species is currently available.…”

Section: Introductionmentioning

confidence: 99%

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Ultrastructural studies of spermatogenesis and the functions of Leydig cells and Sertoli cells associated with spermatogenesis inLarimichthys polyactis(Teleostei, Perciformes, Sciaenidae)

Kang

Chung

et al. 2013

Animal Cells and Systems

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Ultrastructural studies of spermatogenesis and the functions of Leydig cells and Sertoli cells were investigated by electron microscope observation. Ultrastructural characteristics of spermatozoa of Larimichthys polyactis (Sciaenidae) have a round head, a nucleus containing highly compact filamentous clusters of chromatin, slightly eccentric nuclear fossa, no acrosome, a short midpiece with a short cytoplasmic channel, and a flagellum showing the classic axoneme structure (9 '2) and short irregular flagellum lateral fins. The spermatozoon of this species (Sciaenidae) is Perciformes type II: the flagellar axis is parallel to the nucleus, the centriolar complex is outside the nuclear fossa, the proximal centriole is anterior and perpendicular to the distal centriole, and no more than five spherical mitochondria are observed. Each of the well-developed Leydig cells observed during the periods of active meiotic division and before spermiation contains an ovoid vesicular nucleus; a number of smooth endoplasmic reticulum, tubular, or vesicular mitochondrial cristae; and several lipid droplets within the cytoplasm. This indicates that Leydig cells, as typical steroidogenic cells showing several cytoplasmic characteristics, are involved in male steroidogenesis. However, no clear evidence of steroidogenesis or of any transfer of nutrients from the cells to spermatids that appears to be associated with phagocytic function in the seminiferous lobule was observed for Sertoli cells. These findings indicate that Sertoli cells of this species function in phagocytosis and the resorption of products originating from degenerating spermatids and spermatozoa following spermiation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ultrastructural studies of spermatogenesis and the functions of Leydig cells and Sertoli cells associated with spermatogenesis inLarimichthys polyactis(Teleostei, Perciformes, Sciaenidae)

Kang

Chung

et al. 2013

Animal Cells and Systems

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Ultrastructural investigations on spermatogenesis and spermatozoan morphology in the endangered Adriatic sturgeon, Acipenser naccarii (Chondrostei, Acipenseriformes)

Grandi

Astolfi

Chicca

et al. 2018

Journal of Morphology

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Spermatogenesis was investigated in the Adriatic sturgeon, Acipenser naccarii, by light and electron microscopy. The testis of the unrestricted type had a germinal compartment composed of lobules containing germ cells and Sertoli cells, and separated by a basal lamina from the interstitial compartment, in which Leydig and myoid cells were detected for the first time in Acipenseridae. Spermatogenesis occurred in spermatocysts produced when Sertoli cells became associated with type A spermatogonia of subsequent generations, which produced a clone of synchronized aligned spermatogonia. In primary spermatocytes at zygo-pachytene stage, the large spherical nucleus contained synaptonemal complexes. The smaller secondary spermatocytes were ovoid with a central round nucleus and scarce cytoplasm. Spermatids were interconnected by cytoplasmic bridges until early spermiogenesis. Chromatin initially condensed as long, twisted, and nonhomogeneous fibers and finally as a compact structure made of thick filaments.Early spermatids showed the flagellum, the primordia of centriole complex and of "implantation fossa," followed by the acrosomal vesicle formed by Golgi complexes and a fibrous body associated to centriole complex. The spermatozoan head had 10 postero-lateral projections and a trapezoidal nucleus, a cylindrical midpiece with six to eight mitochondria, the centriole complex, and a "9 + 2" flagellum with a pair of lateral fins. Three helical endonuclear canals crossed the nucleus from the acrosome base to the implantation fossa; their spiralization and that of chromatin fibers suggest a spiral twisting of the nucleus during spermiogenesis. The Sertoli cells performed phagocytosis of degenerating spermatids and spermatozoa. Significant interindividual differences were detected in most morphological parameters of spermatozoa. Data on spermatogenesis in A. naccarii and morphometric measurements on mature spermatozoa provide information about the reproductive biology of the species useful not only for phylogenetic studies but also for evaluation of sperm quality for artificial reproduction projects and restocking of this and other critically endangered sturgeon species. K E Y W O R D S Acipenseridae, Sertoli cells, spermatozoon, testis, transmission electron microscopy

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Microautophagy in nutritive phagocytes of sea urchins

Kalachev

Yurchenko

2016

Protoplasma

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Two types of cells were observed in germinative epithelium of male and female sea urchins: germ cells and somatic accessory cells; the latter referred to as nutritive phagocytes. At the onset of gametogenesis, nutritive phagocytes accumulate nutrients and greatly increase in their size. As gametogenesis progresses, the accumulated nutrients are transferred from nutritive phagocytes into developing gametes, and size of the nutritive phagocytes decreases. An electron microscopic study of nutritive phagocytes in sea urchins, Strongylocentrotus intermedius, at different stages of annual reproductive cycle showed for the first time that both macro- and microautophagy take place in nutritive phagocytes. Both processes occur simultaneously and regulate size and composition of nutritive phagocytes in male and female sea urchins. Nutritive phagocytes consume redundant cytoplasm via macroautophagy. Microautophagy is probably involved in consumption of redundant membranes that appear within nutritive phagocytes due to destruction of nutrient-storing globules, macroautophagy, and phagocytosis of germ cells or their remnants.

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Ultrastructure of germ cells, the Leydig cells, and Sertoli cells during spermatogenesis in Boleophthalmus pectinirostris (Teleostei, Perciformes, Gobiidae)

Cited by 33 publications

References 32 publications

Ultrastructural studies of spermatogenesis and the functions of Leydig cells and Sertoli cells associated with spermatogenesis inLarimichthys polyactis(Teleostei, Perciformes, Sciaenidae)

Ultrastructural studies of spermatogenesis and the functions of Leydig cells and Sertoli cells associated with spermatogenesis inLarimichthys polyactis(Teleostei, Perciformes, Sciaenidae)

Ultrastructural investigations on spermatogenesis and spermatozoan morphology in the endangered Adriatic sturgeon, Acipenser naccarii (Chondrostei, Acipenseriformes)

Microautophagy in nutritive phagocytes of sea urchins

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