The Establishment of Spermatogenesis in the Seminiferous Epithelium of the Pubertal Golden Hamster (Mesocricetus auratus)

Miething, Andreas

doi:10.1007/978-3-642-72005-5

Cited by 18 publications

(31 citation statements)

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“…Sperm head count increased gradually from 35 days of age, and agreed with a previous report that showed the establishment of spermatogenesis in the seminiferous tubules of the developing golden hamster [30]. In the present study, the first sperm appeared after elevation of testosterone production stimulated by ascending plasma concentration of LH under high plasma FSH levels.…”

Section: Discussionsupporting

confidence: 93%

Developmental Changes in Testicular Function and Inhibin Secretion of Golden Hamsters (<i>Mesocricetus auratus</i>)

Itoh

Kishi

Ohshima

et al. 2002

Journal of Reproduction and Development

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Abstract. We studied developmental reproduction of male golden hamsters (Mesocricetus auratus) by determining hormone secretion, observing morphological changes including distribution of immunoexpression of inhibin α subunit, 3β-hydroxysteroid dehydrogenase (HSD), and investigating sperm head count from birth to adulthood. Immunoexpression of inhibin α subunit was found in interstitial cells of not well organized testes of neonatal animals, and positive staining was also found in Sertoli cells in developing animals. However, the intensity of immunostaining in Sertoli cells varied when the spematogenic cycle of the seminiferous epithelium began. Testosterone levels in the plasma and testicular contents of testosterone and immunoreactive (ir)-inhibin increased from around 25 days of age, about 10 days before the presence of the first sperm in the testis. On the other hand, plasma concentrations of ir-inhibin progressively increased from birth to 10 days of age, when it reached peak levels. A reciprocal pattern of change between plasma concentrations of ir-inhibin and FSH was found from 10 days of age. Plasma concentrations and pituitary contents of LH increased from 15 days of age and reached adult levels about 40 days of age. The present results suggest that inhibin is an important factor in the regulation of FSH secretion even in infant male golden hamsters, and the regulated FSH may control the increasing the number of germ cells. Inhibin might be not the only endocrine factor as the regulator of FSH secretion, but also a paracrine or autocrine factor which is involved in spermatogenesis in the golden hamster. Key words: Inhibin, Hamster, Development, Testis (J. Reprod. Dev. 48: [343][344][345][346][347][348][349][350][351][352][353] 2002) arly 20 th century experiments, which were the initial proposal for the existence of inhibin, showed that destruction of the germinal epithelium by irradiation caused hyperfunction in the absence of atrophy of the second sex glands [1], and that injection of aqueous testicular extracts to castrated rats prevented the appearance of enlarged "castration cells" in the pituitary [2,3]. These

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Section: Discussionsupporting

confidence: 93%

Developmental Changes in Testicular Function and Inhibin Secretion of Golden Hamsters (<i>Mesocricetus auratus</i>)

Itoh

Kishi

Ohshima

et al. 2002

Journal of Reproduction and Development

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“…It is well known that the morphological differences are observed in the acrosomal formation among species [7]. In the rat, mouse [22] and hamster [12], the spermatid nucleus elongated and then began to curve at its tip. Thus, it changed into sickle-like in shape after the cap phase.…”

Section: Discussionmentioning

confidence: 99%

Cycle of the Seminiferous Epithelium in the Java Fruit Bat (Pteropus vampyrus) and the Japanese Lesser Horseshoe Bat (Rhinolophus cornutus).

Morigaki

Kurohmaru

Kanai‐Azuma

et al. 2001

The Journal of Veterinary Medical Science

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ABSTRACT. The cycle of the seminiferous epithelium in the Java fruit bat, Pteropus vampyrus, and the Japanese lesser horseshoe bat, Rhinolophus cornutus, was investigated by light microscopy and the characteristics of spermiogenesis were compared between these two species. In the Java fruit bat, the cycle of the seminiferous epithelium was divided into 11 stages and developing spermatids were subdivided into 13 steps. While in the Japanese lesser horseshoe bat, the cycle of the seminiferous epithelium was divided into 10 stages and developing spermatids were subdivided into 13 steps. Excepting slight morphological differences, the characteristics of acrosomal formation in both species were almost similar with each other. In the Java fruit bat after stage VII, the acrosome gradually elongated, flattened and finally became scoop-like in shape. In the Japanese lesser horseshoe bat after stage VIII, the acrosome elongated, flattened and then slightly shortened. Before spermiation, the acrosome became long spatula-like in shape. The elongation and flattening of spermatids in these two species were similar to those in insectivores. The finding may reflect the fact that the order Chiroptera is phylogenetically close to the order Insectivora. KEY WORDS: acrosome, cycle of seminiferous epithelium, Japanese lesser horseshoe bat, Java fruit bat, spermiogenesis.

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“…The late development of the epididymidis may explain the lack of fertilizing ability of cauda epididymal sperm from early pubertal hamsters (Weissenberg et al, 1987(Weissenberg et al, , 1994(Weissenberg et al, , 1995. Miething (1998) has reported that the enzyme, 11-betahydroxysteroid dehydrogenase, which promotes testosterone output, appears in testicular Leydig cells at about 30 dpp, suggesting that the sigmoidal increase in epididymal weight may be correlated with rising androgen concentrations. The weights of the organs provide only a crude assessment of the ability of the animal to produce spermatozoa and to conduct the maturation process.…”

Section: Resultsmentioning

confidence: 96%

“…The start of the process of spermatogenesis, defined by the appearance of type A spermatogonia, occurs at 12 days post partum (dpp) in the golden hamster and the first spermatogenic wave is completed at 38 dpp (Miething, 1998). In this study we used animals from 12 to 89 dpp to study spermatogenesis during and after the first spermatogenic wave.…”

Section: Resultsmentioning

confidence: 99%

Spermatogenesis in the golden hamster during the first spermatogenic wave: A flow cytometric analysis

et al. 2000

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The Establishment of Spermatogenesis in the Seminiferous Epithelium of the Pubertal Golden Hamster (Mesocricetus auratus)

Cited by 18 publications

References 0 publications

Developmental Changes in Testicular Function and Inhibin Secretion of Golden Hamsters (<i>Mesocricetus auratus</i>)

Developmental Changes in Testicular Function and Inhibin Secretion of Golden Hamsters (<i>Mesocricetus auratus</i>)

Cycle of the Seminiferous Epithelium in the Java Fruit Bat (Pteropus vampyrus) and the Japanese Lesser Horseshoe Bat (Rhinolophus cornutus).

Spermatogenesis in the golden hamster during the first spermatogenic wave: A flow cytometric analysis

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