Effects of the Ovarian Hormones on Tubal Motility of the Rabbit

Mattos, Carlos E.R.

doi:10.1210/endo-89-3-912

Cited by 24 publications

(12 citation statements)

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“…During the second week, the amplitude of the contractions de creased, but no further decrease in frequency was observed. After the sec ond week the activity increases progressively and by the beginning of the fourth week the pattern of motility is similar to the nonpregnant pattern [7] ( fig. 3).…”

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confidence: 63%

“…No consistent changes in tubal motility were observed from late preg nancy to the puerperium in the rabbit [7]. In the human, the early puer peral tube displays a pattern of activity similar to that recorded during the late luteal phase of the cycle or during menstruation.…”

mentioning

confidence: 77%

“…Maistrello [5] recorded tubal motility in the rabbit with a special type of transducer which is attached to the external walls of the oviduct. Chronic recording of intratubal pressure changes has been used more recently in rabbits [6][7][8][9]; monkeys [10] and in women [11][12][13]. Neri el al.…”

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confidence: 99%

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Contractility of the Fallopian Tube

Maia¹,

Mattos²

1975

Gynecol Obstet Invest

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Recordings of intratubal pressure in women reveal a complex pattern of tubal contractions. Overall activity of the fallopian tube is increased during ovulation. During the luteal phase of the menstrual cycle, activity is depressed but never suppressed. The fallopian tube remains active during gestation in contrast with the uterus which is quiescent. The early puerperal tube displays a pattern of activity similar to that recorded during the late luteal phase of the menstrual cycle. Activation occurs during suckling and in response to exogenous oxytocin, prostaglandins, nor-adrenergic compounds, and ergot derivatives. It is concluded that contractility of the fallopian tube is less influenced by ovarian steroids than that of the uterus.

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confidence: 63%

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confidence: 77%

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Contractility of the Fallopian Tube

Maia¹,

Mattos²

1975

Gynecol Obstet Invest

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“…Croxatto, Vogel & Vasquez (1973) reported that 74 % of microspheres injected into the peritoneal cavity of rabbits 2 months after ovariectomy were in the uterus and vagina 72 h after injection, de Mattos & Coutinho (1971) also showed that tubai motility is maintained 2 months after ovariectomy in the rabbit. When Harper (1964) transferred artificial eggs to rabbits 7 and 35 days after ovariectomy he found 56 h later that 69 and 72 % of the eggs were in the oviduct, and 31 and 18 %, respectively, were in the uterus.…”

Section: Discussionmentioning

confidence: 97%

Egg Transport in Ovariectomized Rabbits as Affected by Different Combinations of Oestrogen and Progesterone

El-Banna¹,

Sacher²

1976

Journal of Endocrinology

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A total of 1548 eggs was transferred to the oviducts of rabbits ovariectomized 45 days to 7 months earlier. The pattern of egg transport was disrupted, and the majority of eggs were in the vagina 60-72 h after transfer. To determine the role of the ovarian hormones on egg transport, the effects of various combinations of oestrogen and progesterone were studied. None of the hormonal treatments produced the normal transport pattern and large proportions of transferred eggs were retained in the oviducts. It is concluded that as long as progesterone is the dominant hormone, eggs move very slowly through the isthmus, and that a surge of oestrogen is required to modify the action of progesterone and to speed the movement of eggs to the uterus.

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“…In vivo studies of oviductal pressure changes have shown a similar pattern of small contractions interspersed with outbursts of increased activity in rabbits, monkeys, and humans (De Mattos and Coutinho, 1971;Coutinho et al, 1975;Fredericks et al, 1982). It is generally believed that short bursts originate in the circular muscle layer, and long trains of spikes in the longitudinal muscles which cover the oviduct dorsally and ventrally and are continuous with the muscles of the mesotubarium superius and mesosalpinx (Talo and Brundin, 1973;Gonzalez de Vargas et al, 1976) (Black et al, 1980).…”

Section: Discussionmentioning

confidence: 98%

Electromyographic activity and noradrenaline content of the rabbit oviduct under different hormonal states

Sachy¹,

Jakubowski²,

Bernet³

et al. 1989

Reprod. Nutr. Dévelop.

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Summary ― Spontaneous electromyographic (EMG) activity of the oviduct recorded in vivo inuntreated, estrogen-treated, and progesterone-treated castrated rabbits was found to exhibit two main patterns : short spike bursts lasting 1-10 s and long trains of action potentials lasting several minutes, which constituted the major component of EMG activity.After estrogen treatment, both wet weight and noradrenaline (NA) content of the castrated rabbit oviduct were enhanced mainly at the ampullary-isthmic junction; long trains of discharges were significantly shorter (2.0―2.7 min vs 3.6-4.6 min) and appeared at more frequent intervals (9.8―12.2 min vs 14.2―22.6 min). After progesterone treatment, spontaneous EMG activity was not significantly different from that in untreated castrated rabbits (as was the NA content) except at the ampullary―isthmic junction.NA injection elicited a stimulatory response of the oviduct lasting 1―7 min in the three hormonal states. Phentolamine strongly depressed spontaneous EMG activity but the inhibition was more transient in castrated rabbits than in estrogen-treated and progesterone-treated animals. Propranolol had no effect on spontaneous EMG activity. intervalles plus rapprochés (9,8―12,2 min vs 14,2-22,6 min). Après traitement par la progestérone, l'activité EMG spontanée n'apparaît pas différente de celle enregistrée chez l'animal castré non traité, de même que la teneur de l'oviducte en noradrénaline, sauf pour la jonction isthme―ampoule. Une injection de noradrénaline provoque l'apparition d'une salve de potentiel de 1 à 7 min de durée dans les trois conditions hormonales. La phentolamine déprime fortement l'activité EMG spontanée, mais l'inhibition est plus transitoire chez les lapines castrées non traitées que chez les animaux traités par les estrogènes et par la progestérone. Le propranolol est sans effet sur l'activité EMG spontanée. Ces résultats, ainsi que les teneurs élevées en noradrénaline mesurées dans toutes les parties de l'isthme, montrent qu'il est possible que 1 innervation adréner-gique de l'oviducte joue un rôle dans l'organisation de la motricité spontanée de l'oviducte chez la lapine.activité électromyographique ― stéroïdes sexuels -noradrénaline -oviducte -lapine

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Effects of the Ovarian Hormones on Tubal Motility of the Rabbit

Cited by 24 publications

References 0 publications

Contractility of the Fallopian Tube

Contractility of the Fallopian Tube

Egg Transport in Ovariectomized Rabbits as Affected by Different Combinations of Oestrogen and Progesterone

Electromyographic activity and noradrenaline content of the rabbit oviduct under different hormonal states

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