A histochemical study of the circumtesticular leydig cells of a teiid lizard, <i>Cnemidophorus tigris</i>

Currie, C; Taylor, Harry L.

doi:10.1002/jmor.1051320107

Cited by 11 publications

(1 citation statement)

References 3 publications

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“…In L. vivipara, L. viridis, Anguis fragilis and Vipera aspis, the presence in these cells of smooth endoplasmic reticulum and mitochondria with tubular cristae (Dufaure, 1969(Dufaure, , 1970, similarly support the attribution of a steroidogenic role to this tissue since these ultrastructural features are known to be associated with steroidogenic cells (Christensen, 1965;Christensen & Gillim, 1969). In the Whiptail lizard, Cnemidophorus tigris, 17P-as well as 3P-HSD, has been reported both in the interstitial tissue and also in the circumtubular lobule boundary cells (Currie & Taylor, 1970). Both these enzymes are intimately concerned with steroid hormone biosynthesis, and their location indicates a locus of hormone metabolism.…”

Section: Introductionmentioning

confidence: 99%

Histological and histochemical changes in the gonads and epididymides of the male Soft‐shelled turtle, Trionyx sinensis

Lofts

Tsui

1977

Journal of Zoology

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The seasonal testicular changes in the Soft‐shelled turtle, T. sinensis, show a well‐marked temporal differentiation between the functional activity of the seminiferous tubules and the interstitial tissue. In the March‐April breeding period, the interstitial cells are large and lipid‐free, with rounded turgid nuclei and a strongly positive reaction to tests for A5‐3P‐hydroxysteroid dehydrogenase. As might be expected with such histochemical manifestations of high androgen secretory activity, the epididymis is also highly developed during this period. In contrast, the seminiferous tubules are regressed, spermatogenetically inactive, and heavily lipoidal. Fertilization is achieved by spermatozoa discharged from the epididymidal canals. Immediately following the breeding period, the interstitial tissue atrophies and becomes strongly lipoidal and negative to tests for 3P‐HSD. This interstitial regression is accompanied by the regression of the epididymides and a concomitant recrudescence of seminiferous tubule activity. The latter rapidly become depleted of their lipid and become strongly positive to tests for 3P‐HSD. Spermatogenesis resumes, and the seminiferous tubules become filled with representatives of all the germinal stages by the end of May. In early autumn there is a cessation of spermatogenesis, and, as the epididymides recover under the influence of a recovering androgen secretion by the redeveloping interstitial cells, the spermatozoa become evacuated from the tubule‐lumina to the epididymidal canals, where they remain until the succeeding breeding season. The seasonal histochemical events are discussed in relation to the basic pituitary‐gonadal regulation of testicular function.

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Section: Introductionmentioning

confidence: 99%

Histological and histochemical changes in the gonads and epididymides of the male Soft‐shelled turtle, Trionyx sinensis

Lofts

Tsui

1977

Journal of Zoology

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Structural characterization and rapid manual isolation of a reptilian testicular tunic rich in Leydig cells

Neaves

1976

Anat. Rec.

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During the annual breeding season, the testes of the lizard Cnemidophorus gularis are yellow-orange, oviod organs measuring almost 1 cm in greatest diameter. The pigment is confined to the testicular tunic, which contains a zone of Leydig cells and vascular channels more than 50 mu thick. Leydig cells constitute approximately 60% of the zone, with remaining space occupied by capillaries, sinusoids, and lymphatic vessels. Lymphatics are concentrated at the interface between tunic and seminiferous tubules. Interstitial space is poorly developed among the tubules, accounting for less than 3% of tissue volume. Capillaries, lymphatics, and few widely scattering Leydig cells occur in the sparse interstitial space. Leydig cells in the tunic and elsewhere in the testis show ultrastructural features commonly found in mammalian Leydig cells. Separation of the tunic from the seminiferous tubules is achieved in a few seconds by manual decapsulation of the testis and yields an enriched preparation of Leydig cells that is essentially uncontaminated by tubular elements.

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Effects of metopirone on the structure of endocrine glands in the male lizard, Cnemidophorus l. lemniscatus (L.)

Conte

1972

Z.Zellforsch

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A histochemical study of the circumtesticular leydig cells of a teiid lizard, Cnemidophorus tigris

Cited by 11 publications

References 3 publications

Histological and histochemical changes in the gonads and epididymides of the male Soft‐shelled turtle, Trionyx sinensis

Histological and histochemical changes in the gonads and epididymides of the male Soft‐shelled turtle, Trionyx sinensis

Structural characterization and rapid manual isolation of a reptilian testicular tunic rich in Leydig cells

Effects of metopirone on the structure of endocrine glands in the male lizard, Cnemidophorus l. lemniscatus (L.)

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