Development of the endoplasmic reticulam during human spermatogenesis

Nistal, Manuel; Paniagua, R.; Esponda, Pedro

doi:10.1159/000145305

Cited by 16 publications

(11 citation statements)

References 15 publications

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“…The observation of the saccular Golgi apparatus associated with cisternae of the rough E R , the presence of polysomes, and the occurrence of vesicles of an electron-dense content (50nm) and of light vesicles (100nm) on the trans-side of the Golgi apparatus, when considered on a comparative basis, lead to the suggestion of some cytophysiological possibilities. On this basis, it is here proposed that dynamic processes of macromolecule or endomembrane flow may occur between the Golgi apparatus and the endoplasmic reticulum in endothelial testicular cells, as has previously been reported for developing spermatogenetic cells (Nistal et al, 1980;Burgos and GutiCrrez, 1986;Orsi et al, 1992).…”

Section: Discussionsupporting

confidence: 54%

Ultrastructural Characteristics of the Testicular Capillaries in the Dog (Canis familiaris, L.)

Duarte

Oliveira

Orsi

et al. 1995

Anat Histol Embryol

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Section: Discussionsupporting

confidence: 54%

Ultrastructural Characteristics of the Testicular Capillaries in the Dog (Canis familiaris, L.)

Duarte

Oliveira

Orsi

et al. 1995

Anat Histol Embryol

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“…AL of many cell types seem to originate from the nuclear envelope. Many times, they have been seen apposed to the nuclear envelope and are structurally similar to it [2,4,5,8,11,19,231. In contrast, AL of other cell types derive from stacks of ER cisternae [3, 101.…”

Section: Discussionmentioning

confidence: 99%

The Formation of Annulate Lamellae in the Human Sertoli Cell

Paniagua

Nistal

Bravo

1984

Archives of Andrology

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The formation of annulate lamellae (AL) has been studied in human Sertoli cells. Sertoli cells of infants did not show AL. Sertoli cells of 9-to 1 1-year-old boys showed incompletely circumferentially arranged cisternae of endoplasmic reticulum (ER), alternating with rows of vesicles, 200-300 nm in diameter, with a weakly osmiophilic content. The ER cisternae displayed both pores and attached ribosomes at a few sites. These membranous structures were also observed beside true concentrically arranged AL in pubertal Sertoli cells (11-13 years of age). Both types of membranous formations were continuous with parallel, rough endoplasmic reticulum cisternae (RER) that interconnected them. Adult Sertoli cells showed only AL, not the other peculiar membranous formation. These features suggest that the RER plus associated vesicles originate the AL in human Sertoli cells.

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“…According to Sun et al, 1977;Nistal et al and Paniagua, 1986, these vesicular structures correspond to annular lamellae, probably originated from the nuclear envelope, which would contribute to the Golgi apparatus development and, indirectly, to acrosome formation.…”

Section: Discussionmentioning

confidence: 99%

Ultrastructural Aspects of Spermatids in Isogenic Black Mouse C57BL6J

Martins

Silva

2005

Int. J. Morphol.

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aspects of spermatids in isogenic black mouse C57BL6J. Int. J. Morphol., 23(4):323-328, 2005. SUMMARY:The objective of this study was to describe some changes in spermatids differentiating events during spermiogenesis, leading to spermatozoa final formation. The animals were sacrificed with ethylic acid inhalation and, then, testis fragments were collected, fixed in Karnovsky and post-fixed in osmium tetroxide. After dehydration, the sections were stained with uranyl acetate 2%. It was observed in early spermatids at Golgi phase, formation of acrosomal granule contained in the acrosomal vesicle, spheroidal nucleus with rugous reticulum around it, and Golgi apparatus made up of lamellae and vesicular structures. At cephalic hood phase, the granule suffers flattening and the marginal fossa is formed. In both phases, it was possible to observe the presence of multivesicular body. At acrosomal phase, the acrosomal system is set up, and several enzymes of endoplasmatic reticulum as well chromatoid body are observed in the cytoplasm. At the last phase, that is, maturation, the nucleus becomes more elongated, the endoplasmatic reticulum regresses, the Golgi apparatus approaches to the flagellum and mitochondrias align next to it.

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Development of the endoplasmic reticulam during human spermatogenesis

Cited by 16 publications

References 15 publications

Ultrastructural Characteristics of the Testicular Capillaries in the Dog (Canis familiaris, L.)

Ultrastructural Characteristics of the Testicular Capillaries in the Dog (Canis familiaris, L.)

The Formation of Annulate Lamellae in the Human Sertoli Cell

Ultrastructural Aspects of Spermatids in Isogenic Black Mouse C57BL6J

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