Ueber das Vorkommen krystallinischer und krystalloider Bildungen in den Zellen des menschlichen Hodens

Lubarsch, O.

doi:10.1007/bf01978374

Cited by 45 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our results support the incidental observations of Harding & Aplin (), who noted the lack of crystalloids in the testis of a single SHN wombat. Similar crystalloids have also been reported to occur in humans (Lubarsch, ; Sohval et al. ), the pig (Toyama, , ; Toyama et al.…”

Section: Discussionsupporting

confidence: 72%

The seminiferous epithelial cycle and microanatomy of the koala (Phascolarctos cinereus) and southern hairy‐nosed wombat (Lasiorhinus latifrons) testis

et al. 2013

View full text Add to dashboard Cite

The koala (Phascolarctos cinereus) and southern hairy-nosed wombat (Lasiorhinus latifrons) are iconic Australian fauna that share a close phylogenetic relationship but there are currently no comparative studies of the seminiferous epithelial cell or testicular microanatomy of either species. Koala and wombat spermatozoa are unusual for marsupials as they possess a curved stream-lined head and lateral neck insertion that superficially is similar to murid spermatozoa; the koala also contains Sertoli cells with crystalloid inclusions that closely resemble the Charcot-Bottcher crystalloids described in human Sertoli cells. Eighteen sexually mature koalas and four sexually mature southern hairy-nosed (SHN) wombats were examined to establish base-line data on quantitative testicular histology. Dynamics of the seminiferous epithelial cycle in the both species consisted of eight stages of cellular association similar to that described in other marsupials. Both species possessed a high proportion of the pre-meiotic (stages VIII, I -III; koala -62.2 AE 1.7% and SHN wombat -66.6 AE 2.4%) when compared with post-meiotic stages of the seminiferous cycle. The mean diameters of the seminiferous tubules found in the koalas and the SHN wombats were 227.8 AE 6.1 and 243.5 AE 3.9 lm, respectively. There were differences in testicular histology between the species including the koala possessing (i) a greater proportion of Leydig cells, (ii) larger Sertoli cell nuclei, (iii) crystalloids in the Sertoli cell cytoplasm, (iv) a distinctive acrosomal granule during spermiogenesis and (v) a highly eosinophilic acrosome. An understanding of the seminiferous epithelial cycle and microanatomy of testis is fundamental for documenting normal spermatogenesis and testicular architecture; recent evidence of orchitis and epididymitis associated with natural chlamydial infection in the koala suggest that this species might be useful as an experimental model for understanding Chlamydia induced testicular pathology in humans. Comparative spermatogenic data of closely related species can also potentially reflect evolutionary divergence and differences in reproductive strategies.

show abstract

Section: Discussionsupporting

confidence: 72%

The seminiferous epithelial cycle and microanatomy of the koala (Phascolarctos cinereus) and southern hairy‐nosed wombat (Lasiorhinus latifrons) testis

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Montgomery's results are diagrammatically shown in Of thirty antepenultimate spermatogonia examined, twenty-three contained each a rod-shaped structure (Fig. 41, B, R) and it seems probable that this peculiar body, which is identified by von Winiwarter with the " cristalloide de Lubarsch " (Lubarsch, 1896 Montgomery, 1911. ) of the antepenultimate spermatogonia the rod passes undivided into one of the daughter cells ; thus onehalf of the penultimate spermatogonia possess a rod, the other half do not.…”

Section: Many Investigators Have Figured Spermatogonialmentioning

confidence: 99%

The germ-cell cycle in animals, by Robert W. Hegner.

Hegner¹

1914

View full text Add to dashboard Cite

show abstract

“…Lubarsch, 1896), is present in every cell of this generation. This rod is considered by Montgomery to be of cytoplasmic origin and is termed by him a " Sertoli cell determinant."…”

mentioning

confidence: 99%

The germ-cell cycle in animals, by Robert W. Hegner.

Hegner¹

1914

View full text Add to dashboard Cite

PAGE maintain that while protoplasm may appear to be fibrillar or alveolar, its essential basis consists of multitudes of minute granules. Wilson's view is the one usually adopted at the present time; that is, the protoplasm of the same cell may pass successively "through homogeneous, alveolar, and GERM-CELL CYCLE IN ANIMALS are not supposed to form part of the living substance; these are pigment granules, fat globules, excretory products, vacuoles (v) 9 etc. It has been found possible to explain many cellular activities and even the results obtained by experimental animal breeding by studies of the physics and chemistry of protoplasm. An exhaustive account of the subject is impossible and even unnecessary here, but the importance assigned to the physicochemical explanation of life phenomena requires a brief statement. Kossel has separated the cellular constituents into two main groups. (1) Primary constituents are those necessary for life ; these are water, certain minerals, proteins, nucleoproteins, phosphatides (lecithin), cholesterin, and perhaps others. (2) Secondary constituents are not essentially necessary and do not occur in every cell ; they are usually stored up reserve material or metabolic products representing principally what we have termed metaplasm. Water which constitutes about two-thirds of the animal is necessary for the solution of various bodies, the dissociation of chemical compounds, the exchange of materials, the removal of metabolic products, etc. Mineral substances are present in all animal tissues, and different tissues are characterized by the presence of different minerals. The principal ones are potassium, sodium, calcium, magnesium, iron, phosphoric acid, sulphuric acid, and chlorine. The other constituents are of a colloidal nature, and its richness in colloids is one of the chief charac-GERM-CELL CYCLE IN ANIMALS The principal poles are dissimilar ; the end of the egg containing most of the cytoplasm and nearer which lie the nucleus and centrosome is known as the animal pole ; the other end, which is often crowded FIG. 4. Germ cells. Ovarian ovum of a cat just before maturity. c. m. = cell membrane; mics. = microsomes; ncl = nucleolus; n. m = nuclear membrane; yk. al. = yolk alveoli. (From Dahlgren and Kepner.) with the yolk globules, is called the vegetative pole. The subject of the organization of the egg will be referred to more in detail later (Chapter VIII). The male sex cells or spermatozoa differ very strikingly from the eggs. They are usually of the of some of the principal types of life cycles we may select certain insects and coelenterates. A very simple life cycle is that of the wingless insects of the order APTERA. The young, when they hatch from the egg, are similar in form, structure, and habits to the fully grown individual and undergo no perceptible changes, except increase in size, until they become sexually mature adults. In INDEX OF SUBJECTS All numbers refer to pages. Words in italics are names of families, genera, species, or of higher divisions. Numbers in t...

show abstract

Ueber das Vorkommen krystallinischer und krystalloider Bildungen in den Zellen des menschlichen Hodens

Cited by 45 publications

References 1 publication

The seminiferous epithelial cycle and microanatomy of the koala (Phascolarctos cinereus) and southern hairy‐nosed wombat (Lasiorhinus latifrons) testis

The seminiferous epithelial cycle and microanatomy of the koala (Phascolarctos cinereus) and southern hairy‐nosed wombat (Lasiorhinus latifrons) testis

The germ-cell cycle in animals, by Robert W. Hegner.

The germ-cell cycle in animals, by Robert W. Hegner.

Contact Info

Product

Resources

About