[Sex hormone receptors, prostaglandins and cAMP, in functional activity of the uterus]. / Rol retseptorov polovykh gormonov, prostaglandinov i TsAMF v funktsionalnoi aktivnosti matki.

The levels of progesterone and estrogen receptors, cAMP and prostaglandins E2 and F2 alpha were studied in the decidua of pregnant women, which was obtained during surgical, spontaneous or prostaglandin-induced abortion or by pregnancy termination with vacuum aspiration after RU-486 treatment (before the onset of abortion). Our data have allowed the authors to suggest that (i) for the maintenance of normal activity of decidua during pregnancy, the following points are considerably important: the constant ratio of progesterone and estrogen receptors in favor of progesterone receptors, low PG levels and high cAMP levels; (ii) both spontaneous and induced abortion are characterized by decreases in the levels of progesterone receptor (which in turn changes the ratio of progesterone and estrogen receptors in favor of the latter), by increased PG levels and decreasing cAMP concentrations.

[Endometrial steroid receptor levels in habitual abortion in advanced pregnancy]. / Soderzhanie steroidnykh retseptorov v éndometrii pri privychnom nevynashivanii beremennosti pozdnikh srokov.

Estrogen and progesterone reception was examined in the endometrial cytoplasmic and nuclear fraction from apparently healthy subjects and patients with habitual late incompetent pregnancy in the early proliferative and late secretory periods of a menstrual cycle. The reception of the two reproductive hormones in the nuclei and the binding of estrogens in the endometrial cytosol were demonstrated to be significantly higher in the female patients than in healthy subjects. The cytosol estrogen to progesterone reception ratio was increased in the patients in the secretory phase of a menstrual cycle than in normal females. There was a complete normalization of endometrial reproductive hormone receptor levels in the patients undergoing hyperbaric oxygenation.

[State of the sex hormone receptor in the endometrium of women with late habitual abortion]. / Sostoianie retseptornogo apparata polovykh gormonov v éndometrii zhenshchin pri privychnom nevynashivanii beremennosti pozdnikh srokov.

A study was made of estrogen and progesterone reception of the endometrial cytoplasmatic and nuclear fractions of healthy women and women suffering from late habitual abortion in the early proliferative and late secretory phases of the menstrual cycle. Reception of both sex hormones in the nuclei and estrogen binding in the endometrial cytosol of women with late habitual abortion was significantly higher than that in healthy women. The estrogen receptors/progesterone receptors ratio in the cytosol in the pathological endometrium at the secretory phase of the menstrual cycle was higher than in the normal one. Hyperbaric therapy given to such patients resulted in complete normalization of endometrial sex hormones reception.

[Structural-functional organization of the brain amygdaloid complex in the dynamics of the estrous cycle]. / Strukturno-funktsional'naia organizatsiia mindalevidnogo kompleksa mozga v dinamike éstrusnogo tsikla.

As a result of amygdaloid complex detailed histology-physiological investigation statistically proved increase in estrus has been discovered in comparison with metestrus of medium size cell nucleus of some cortico-medial group structures and basolateral nucleus. The presence of differences in the level of estrogen binding of rostral and caudal parts of this brain structure, taking place both in male and female rats has been shown for the first time. It was also discovered the dependence of the level of estrogen binding on estrus stage.

[Plasma levels of sex hormones and their receptors in the endometrium of women with normal menstrual cycle]. / Soderzhanie polovykh gormonov v plazme i ikh retseptorov v éndometrii zhenshchin v normal'nom menstrual'nom tsikle.

Plasma estrogen, progesterone, cortisol and prolactin concentrations were determined by RIA in 20 healthy women on the 7th-10th and 24th-26th days of the menstrual cycle. The content of estrogen and progesterone receptors in the cytosol and nuclei of the endometrium was studied by a method of adsorption on dextran-covered carbon; pathomorphological investigation of the endometrium was performed. Sex hormone concentration was shown to be significantly lower in the middle (proliferative) phase as compared to the late one (secretory). Cortisol and prolactin concentrations in both periods did not change. The content of both sex hormone receptors was significantly higher in the middle (proliferative) phase. On the basis of the content and ratio of plasma sex hormones and receptor content in the endometrium a conclusion was made that the main factor in the regulation of receptor levels by sex hormones was the ratio of their concentrations in the plasma.

[Estrogen and progesterone receptors in the decidual tissue of women administered prostaglandins and experiencing spontaneous abortion]. / Retseptory ésterogenov i progesterona v detsidual'noi tkani zhenshchin pri vvedenii prostaglandinov i samoproizvol'nom preryvanii beremennosti.

A study was made of the content of estrogen and progesterone receptors (ER and PR, respectively) in the cytosol and nuclei of the decidual tissue of women in induced and spontaneous abortion at 7-12 week pregnancy. Abortion was done surgically (control group) and in preliminary cervical dilatation with the help of intravaginal suppositories with a synthetic prostaglandin analog of E1-16.16-dimethyltrans-delta 2-PGE1 (ONO-802) group or laminaria. The level of ER in the cytosol and nuclei of the decidual tissue of the control group was twice as low as that of PR, and the ER/PR ratio in cell fractions as well as in general cell receptors was 0.58 +/- 0.09, 0.42 +/- 0.07 and 0.56 +/- 0.07, respectively. The suppositories with ONO-802 caused a statistically significant decrease in the PR content in each of the cell fractions and cytoplasmic ER resulting in an increase in the ER/PR ratio to 0.87 +/- 0.06 (P less than 0.05) in the cytosol, 0.09 +/- 0.24 (P less than 0.05) in the nuclei, and 0.86 +/- 0.8 (P less than 0.05) in the total cell. A decrease in the PR level in both cell fractions and the ER level in the fraction of the nuclei with an acute increase in the content of cytoplasmic ER was marked in spontaneous abortion. The ER/PR ratio also rose to ER and was 1.98 +/- +/- 0.2 (P less than 0.001) in the cytosol and 1.02 +/- 0.16 (P less than 0.05) in the total cell. It was concluded that an absolute and/or relative decrease in the PR level plays an important role in mechanism of abortion.

[Hormonal regulation of estrogen and progesterone receptor biosynthesis in human endometrial tissue culture]. / Gormonal'naia reguliatsiia biosinteza retseptorov éstrogenov i progesterona v kul'ture tkani éndometriia cheloveka.

Estradiol and progesterone effects on the biosynthesis of estrogen and progesterone cytoplasmic receptors have been studied in the endometrium culture tissue of pregnant women. It was established that in a 48-hour culture estradiol stimulated the biosynthesis of its own and progesterone receptors. Under the same conditions progesterone stimulated the biosynthesis of estrogen receptors but did not affect the biosynthesis of its own receptors.

[Prostaglandin regulation of the sex hormone receptor content in human decidual tissue]. / Regulirovanie prostaglandinami soderzhaniia retseptorov polovykh gormonov v detsidual'noi tkani cheloveka.

Prostaglandin F2 alpha (PGF2 alpha) and its synthetic analog, 15-methyl-PGF2 alpha effects on the receptor content of estrogens and progesterone in the human decidual tissue were studied in vitro and in vivo experiments. The receptor content in vivo experiments was determined by Sketchard's technique and in vitro by the saturation method. Three hours after intravaginal administration of 15-methyl-PGF2 alpha suppositories to pregnant women the level of estrogen and progesterone receptors in decidual tissue cytosol significantly increased. Affinity of receptors with hormones remained unchanged. 10, 20, 50 and 100 mcg/ml concentrations of PGF2 alpha produced a significant and dose-dependent increase in the receptor content of estrogens following 15, 30, 60 and 180 minutes incubation of decidual tissue sections. The receptor level of progesterone remained unchanged. In experiments with inhibitors of protein and RNA biosynthesis, it was shown that an augmentation of the estrogen receptor content under PGF2 alpha action is not associated with biosynthesis of receptors de novo.

[Effect of various 1,3,5(10)-estratrien derivatives on the estrogen receptor transport into the nucleus in the guinea pig uterus]. / Vliianie razlichnykh proizvodnykh 1,3,5(10)-éstratriena na transport retseptora éstrogenov v iadro v matke morskoi svinki.

The capacity of five derivates of 1, 3, 5 (10)-estratrien to be transported together with estradiol receptor from the cytoplasm into the nucleus in the uterus of sexually immature guinea pig was investigated. The extent of this transport was assessed by the amount of estrogen receptor in the nucleus following incubation of the uterine slices in the presence of the compound tested (2.5.10(-7) M). The content of estrogen receptor in the nucleus of the intact guinea pig uterus served as control. Incubation of the uterine slices with compounds containing 17 beta-hydroxyl group (2-brom-1, 3, 5 (10)-estratriendiol-3, 17 beta, 4-brom-1,3,5 (10)-estratriendiol, 3, 17 beta, 1, 3, 5 (10)-estratrienol-17 beta), led to a 1.9--4.2-fold increase in the content of nuclear estrogen receptor, this pointing to the transport of the estrogen receptor complex with these compounds into the nucleus. Two compounds (1, 3, 5 (10) estratrienol-3 beta and 3-methoxy-1, 3, 5 (10)-estratrien) contained no 17 beta-hydroxyl group and failed to increase the contents of the estrogen receptor in the nucleus in comparison with control. 17 beta-hydroxyl group is apparently necessary for the formation of conformative changes in the receptor molecule transforming the steroid-receptor complex into the active one, capable of transporting into the nucleus.

[Sex hormone regulation of progesterone and estradiol receptors in the cytosol of human endometrium in normal and pathologic pregnancy]. / Regulirovanie polovymi gormonami soderzhaniia retseptorov progesterona i estradiola v tsitozole endometriia cheloveka pri normal'noi i patologicheskoi beremennosti.

Hormonal control of progesterone and estradiol receptors was studied in the cytozol of short-lived culture of human endometrium in normal and undeveloping pregnancy. Endometrium was cultivated in the presence of estradiol or progesterone for 16 hours. In cultivation of normal endometrium with estradiol the content of estradiol receptors increased 4-fold in comparison with unstimulated tissue, and of progesteron receptors--3-fold. In cultivation of normal endometrium with progesterone the content of estradiol receptors rose 4--5-fold, and of progesterone receptors--3-fold. In cultivation of pathological endometrium with estradiol or progesterone the number of estradiol receptors was only doubled, and of progesterone receptors--increased only 1 1/2 times, this pointing to a diminished sensitivity of pathological endometrium to the regulating action of sex hormones.

PIP: Hormonal control of progesterone and estradiol receptors was studied in the cytozol of a short-lived culture of human endometrium in both normal and undeveloping pregnancy. Endometrium was cultivated in the presence of estradiol or progesterone for 16 hours. In the cultivation of the normal endometrium with estradiol, the content of estradiol receptors increased 4-fold in comparison with the normal tissue, and the progesterone receptors increased 3-fold. In the culturation of the normal endometrium with progesterone, the content of the estradiol receptors rose 4-5-fold while the progesterone receptors increased 3-fold. In the cultivation of the pathological endometrium with either estradiol or progesterone, the number of estradiol receptors only doubled and the progesterone receptors increased only 1-1/2 times. This points to a diminished sensitivity of a pathological endometrium to the regulating action of sex hormones. (Authors' modified)

[Sex hormone reception in the human endometrium in normal and pathological pregnancy]. / Retseptsiia polovykh gormonov v éndometrii cheloveka pri normal'noi i patologicheskoi beremennosti

A study was made of reception of 17 beta-estradiol, progesterone, and testosterone in human endometrium during pregnancy. In the cytozol of the endometrium each of the sex steroids was bound by three different receptor components, two of which were represented by highly specific proteins. The maximal capacity of specific cytozol receptors to each of the sex steroids was measured in normal and pathological pregnancy; in the latter case the number of receptors to progesterone proved to be decreased. It is supposed that one of the specific binding components is necessary only under conditions of increased functional load upon the organ.