Histology and histochemistry of the testis and ovary of the platyfish, Xiphophorus maculatus, from birth to sexual maturity
| Autor: | Martin P. Schreibman, Ellen J. Berkowitz, Rob van den Hurk |
|---|---|
| Rok vydání: | 1982 |
| Předmět: |
Male
endocrine system medicine.medical_specialty 3-Hydroxysteroid Dehydrogenases Histology Stromal cell Ovary Glucosephosphate Dehydrogenase Biology Pathology and Forensic Medicine Internal medicine Testis medicine Animals Sexual maturity Sexual Maturation Granulosa Cells Sertoli Cells urogenital system Fishes Leydig Cells Efferent ducts Cell Biology Xiphophorus Sertoli cell biology.organism_classification medicine.anatomical_structure Endocrinology Female Development of the gonads |
| Zdroj: | Cell and Tissue Research. 224:81-87 |
| ISSN: | 1432-0878 0302-766X |
| Popis: | The gonads of 3-day- to 7-month-old male and female platyfish (Xiphophorus maculatus) were examined for the presence of delta 5-3 beta-hydroxysteroid dehydrogenase (3 beta-HSD) and glucose-6-phosphate dehydrogenase (G6PD) by histochemical means. In 3-day-old males a positive response for both enzymes is localized in the Leydig cells. With subsequent testicular development, these cells increase in number and display greater activity at the periphery of the testis and around the efferent ducts. In 3-day-old females 3 beta-HSD and G6PD are localized in the stromal cells of the ovary. These cells increase in number and activity as the animals become sexually mature. Sertoli cells, efferent duct epithelium, and ovarian granulosa cells are negative at all stages of development examined. Our findings suggest that the gonads of neonatal fish possess the potential for steroidogenesis. The role played by sex-steroid hormones in the maturation of the brain-pituitary-gonad axis is discussed. |
| Databáze: | OpenAIRE |
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