Effects of exogenous gonadotrophins and gonadal hormones on the testes and seminal vesicles of hypophysectomized catfish, Heteropneustes fossilis (bloch).

@article{Sundararaj1967EffectsOE,
  title={Effects of exogenous gonadotrophins and gonadal hormones on the testes and seminal vesicles of hypophysectomized catfish, Heteropneustes fossilis (bloch).},
  author={B. I. Sundararaj and S. Nayyar},
  journal={General and comparative endocrinology},
  year={1967},
  volume={8 3},
  pages={
          403-16
        }
}
Response of regressed testes and seminal vesicles was studied after 30-day treatment with testosterone propionate (TP) or estradiol benzoate (EB) in 136-day hypophysectomized catfish, and with ovine follicle-stimulating hormone (FSH), human chorionic gonadotrophin (HCG), and TP singly or in combination in 337-day hypophysectomized catfish, Heteropneustes fossilis . In 136- and 337-day hypophysectomized controls, the testes and seminal vesicles showed complete regression; spermatogenesis in the… Expand
Effects of salmon pituitary gonadotropin, ovine luteinizing hormone, and testosterone on the testes and seminal vesicles of hypophysectomized catfish, Heteropneustes fossilis (Bloch).
TLDR
The possibility of one functional gonadotropin regulating the whole maturation phenomenon in the male catfish is discussed, and a dose-dependent response in the testes and seminal vesicles is studied. Expand
Spermatogenic and steroidogenic activity in the testis of the lizard, Calotes versicolor, treated with mammalian gonodatropins and testosterone
TLDR
A significant increase in the testis weight and diameter of the seminiferous tubules and the nuclear diameters of Leydig and Sertoli cells were markedly increased after the gonadotropin treatment during both phases of the lizard's testicular cycle. Expand
Effects of estrogen, progesterone, and testosterone on the pituitary and ovary of catfish, Heteropneustes fossilis (Bloch).
TLDR
Estradiol benzoate, testosterone propionate and progesterone have been administered orally over 45 days during the late preparatory period to intact female catfish showing ovarian recrudescence to induce significant reduction in the number of pituitary basophils and extensive follicular atresia in the ovaries. Expand
Effect of prolactin on the “seminal vesicles” and neural regulation of prolactin secretion in the catfish Heteropneustes fossilis (Bloch)
TLDR
The results indicate that the neural control of prolactin secretion in the catfish is presumably accomplished by an inhibitory mechanism similar to that demonstrated in the mammals. Expand
Effect of gonadotropins and testosterone on the initiation of spermatogenesis in the hypophysectomised Indian house lizard, Hemidactylus flaviviridis Ruppell.
TLDR
The results indicate that the initiation of gametogenic and androgenic functions in the testis of the Indian house lizard are dependent on an FSH-like protein. Expand
Effects of mammalian gonadotropins (FSH and LH) on the testes of the lizard Anolis carolinensis.
TLDR
The observed thermal effects and differential dose sensitivity of various testicular responses suggest that annual cycles of spermatogenesis and interstitial cell activity in reptiles may result from variations in the level of a single gonadotropin (or gonadotropic-complex). Expand
Effects of piscine and mammalian gonadotropins on gametogenesis in the catfish, Heteropneustes fossilis (bloch)
Abstract Salmon (SG-G100) and mammalian (ovine FSH and LH) gonadotropins were tested for their gonadotropic activity in the hypophysectomized catfish, Heteropmeustes fossilis , by evaluatingExpand
Ovarian maintenance in the hypophysectomized catfish, Heteropneustes fossilis (Bloch), with mammalian hypophyseal and placental hormones, and gonadal and adrenocortical steroids.
TLDR
Of the two placental gonadotropins, the ovaries were better maintained with HCG than with PMS; between HCG and LH, the former was considerably more effective than the latter. Expand
Seasonal effects of pinealectomy on testicular recrudescence and secretory activity of seminal vesicles in the catfish Heteropneustes fossilis (Bloch)
TLDR
The findings suggest that the role of the pineal in catfish reproduction is variable and depends upon the photoperiod and temperature regimes to which the fish are exposed, as well as on the time of the year and the state of the reproductive cycle. Expand
Effect of estradiol benzoate, human chorionic gonadotropin, and follicle-stimulating hormone on unilateral ovariectomy-induced compensatory hypertrophy in catfish, Heteropneustes fossilis (Bloch).
Abstract Studies on the compensatory hypertrophy response of the catfish ovary after unilateral ovariectomy during the spawning season indicate that the remaining ovary has the ability to compensateExpand
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TLDR
Treatment with all the three hormones at the same time resulted in marked synergism in stimulating the seminal vesicles of the catfish, Heteropneustes fossilis, and maximum response was observed after simultaneous administration of TP, LtH, and STH. Expand
Effects of testosterone and gonadotropins on spermatogenesis in Rana pipiens Schreber.
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Spermatogenetic inhibition occurs primarily by a direct action of exogenous testosterone on the seminiferous epithelium in Rana pipiens during all seasons of the year and also in hypophysectomized frogs treated with gonadotropins. Expand
Reinitiation and Restoration of Spermatogenesis with Testosterone Propionate and Other Hormones After a Long-Term Post-hypophysectomy Regression Period
TLDR
Although testosterone alone can restore spermatogenesis to a limited extenuating circumstances, the testes of animals given TP+STH or TP+ STH+T4 for 35 days were heavier than those of animals receiving TP alone, and a few of the seminiferous tubules contained maturation phase sperMatids. Expand
Pituitary control of the testis of the hypophysectomized rat.
TLDR
Follicle stimulating hormone (FSH), injected at doses which did not show contamination with ICSH, had only slight effects on testicular weight and development; only the highest levels of FSH injected caused barely perceptible stimulation of the accessory organs. Expand
Effects of methyl testosterone on the testes of a hypophysectomized cyprinodont fish
TLDR
Administration of methyl testosterone to hypophysectomized, sexually regressed, male Fundulus heteroclitus initiated the development of nuptial coloration within two weeks and caused hypertrophy of the epithelium of the efferent ducts and restored the atrophied interstitial cells to near normal breeding condition. Expand
SOME EFFECTS OF ANDROGENS ON THE ADULT MALE FUNDULUS
Adult male Fundulus hypophysectomized during the breeding season were injected intraperitoneally with 8 mg. of testosterone propionate during a 42 day period. The hormone maintained the yellow bodyExpand
SOME EFFECTS OF GONADOTROPIC HORMONES ON THE THREESPINE STICKLEBACK, GASTEROSTEUS ACULEATUS
Sticklebacks collected during the autumn and maintained under 8-hour daily photoperiods did not mature sexually; their gonads remained in the condition characteristic of late summer and autumn fishExpand
The endocrine control of the sexual cycle in the plaice, Pleuronectes platessa (L). III. The endocrine control of spermatogenesis.
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TLDR
Evidence is presented which suggests that oviposition is also under pituitary control, and the oocytes remaining in the ovary after hypophysectomy can be stimulated to grow by injecting extracts of plaice pituitARY glands. Expand
The Seminal Vesicles and Their Seasonal Changes in the Indian Catfish, Heteropneustes
TLDR
The seminal vesicles were observed in the male Heteropneustes in connection with the studies on the correlation between the structure of the pituitary gland and the sea-sonal changes in the testes (Sundararaj, 1958). Expand
CHANGES IN GONADS AND THE THYROID GLAND AFTER HYPOPHYSECTOMY IN OPHICEPHALUS PUNCTATUS BLOCH.
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  • The Journal of experimental zoology
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TLDR
Hypophysectomy in O. punctatus results in the atrophy of gonads and low activity of thyroid gland, and changes in thyroid follicles in the absence of the pituitary gland are reduction in number, flattened epithelial cells, and accumulation of colloid in the follicles. Expand
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