Effects of nerve stimulation on amphibian oviductal activity

Cisint, Susana; Fernández, Silvia N.; Crespo, Claudia A.; Villagra, Lucrecia Iruzubieta; Ramos, Inés

doi:10.1016/j.micron.2018.01.005

Cited by 1 publication

(1 citation statement)

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“…For the purpose of minimizing individual variations in the pattern of gonadal activity, the ovaries of the same animal were used as a control and experiment. In effect, one of the ovaries was kept unstimulated (control ovary) while the contralateral one was stimulated by electrical stimuli applied to the nerve fibers that supply the organ (stimulated ovary), as described by Cisint et al (2018). Each gonad was then incubated separately at 25 ± 1°C for 1 h in 10 ml of amphibian Ringer's solution.…”

Section: Methodsmentioning

confidence: 99%

Effect of nervous stimulation on ovarian steroid secretion in amphibians

et al. 2020

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In the present study, the effect of nerve stimulation on the secretory activity of the ovary of adult females was analyzed for the first time in amphibians. Results revealed that in Rhinella arenarum the stimulation of nerves that supply the gonad induced an increase in estradiol and progesterone secretion, this response showing differences during the reproductive cycle of the species. During the postreproductive period, an increase in estradiol secretion was observed while, in the reproductive period, progesterone secretion increased. Our results suggest that the sympathetic division of the autonomic nervous system would be responsible for this increase, taking into account that, under our experimental conditions, acetylcholine did not affect the endocrine activity of the gonad, while adrenaline (epinephrine) was effective in inducing steroid secretion an effect that could be due to interaction with β receptors. On the other hand, our data show that the association of adrenaline with follicle-stimulating hormone increased estradiol secretion during the postreproductive period, while the association of catecholamine with LH or hCG increased progesterone secretion during the reproductive period. Our results would suggest that nerve stimulation, mediated by the release of adrenaline, would act synergistically with gonadotrophins to stimulate steroid secretion.

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Section: Methodsmentioning

confidence: 99%