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Noguchi M, Ikedo T, Kawaguchi H, Tanimoto A. Estrus synchronization in microminipig using estradiol dipropionate and prostaglandin F2α. J Reprod Dev 2016; 62:373-8. [PMID: 27151362 PMCID: PMC5004793 DOI: 10.1262/jrd.2015-169] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 04/04/2016] [Indexed: 01/31/2023] Open
Abstract
The induction of pseudopregnancy by the exogenous administration of estradiol dipropionate (EDP) was investigated in cyclic Microminipigs (MMpigs) and the effects of exogenous administration of prostaglandin (PG) F2α on estrus exhibition were assessed in pseudopregnant MMpigs. In experiment 1, ovariectomized MMpigs were given a single intramuscular injection of 0.5, 1.5, or 2.5 mg of EDP. The estradiol-17β level at each of these doses was significantly higher 1 to 3 days after EDP administration than on the day of the injection. In experiment 2, animals were given 1.5 mg of EDP once at 9 to 12 days after the end of estrus (D0) and then no (1.5 mg × 1 group), one (D0 and D4; 1.5 mg × 2 group), or two (D0, D4 and D7; 1.5 mg × 3 group) additional treatments. The pseudopregnancy rate was significantly higher in the 1.5 mg × 3 than in the 1.5 mg × 1 group. In experiment 3, PGF2α was administered twice between 26 and 28 days after EDP treatment to five pseudopregnant gilts with a 24-h interval between the two injections. Estrus after PGF2α treatment and LH surge were observed in 100% and 80% pseudopregnant MMpigs, respectively. The interval from the day of the first PGF2α treatment to the onset of estrus was 6.5 ± 0.2 days. These results indicate that multiple EDP treatments are required for induction of pseudopregnancy in MMpigs and estrus exhibition can be controlled in MMpigs by treatment with EDP and PGF2α.
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Affiliation(s)
- Michiko Noguchi
- Department of Veterinary Medicine, Azabu University, Kanagawa 252-5201, Japan
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Ghorbanian MT, Tiraihi T, Mesbah-Namin SA, Fathollahi Y. Selegiline is an efficient and potent inducer for bone marrow stromal cell differentiation into neuronal phenotype. Neurol Res 2013; 32:185-93. [PMID: 19422735 DOI: 10.1179/174313209x409016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Mohammad Taghi Ghorbanian
- Department of Anatomical Sciences, School of Medical Sciences, Tarbiat, Modares University, Tehran, Iran
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NOGUCHI M, KASHIWAI S, ITOH S, OKUMURA H, KURE K, SUZUKI C, YOSHIOKA K. Reproductive Hormone Profiles in Sows on Estrus Synchronization using Estradiol Dipropionate and Prostaglandin F 2α-Analogue and the Reproductive Performance in Female Pigs on Commercial Farms. J Vet Med Sci 2013; 75:343-8. [DOI: 10.1292/jvms.12-0022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Michiko NOGUCHI
- Pathology and Pathophysiology Research Division, National Institute of Animal Health, Tsukuba, Ibaraki 305–0856, Japan
| | | | - Seigo ITOH
- Laboratory of Veterinary Internal Medicine, Azabu University, Sagamihara, Kanagawa 252–5201, Japan
| | - Hanako OKUMURA
- Value Farm Consulting Ltd., Ushiku, Ibaraki 300–1260, Japan
| | - Katsumasa KURE
- Value Farm Consulting Ltd., Ushiku, Ibaraki 300–1260, Japan
| | - Chie SUZUKI
- Pathology and Pathophysiology Research Division, National Institute of Animal Health, Tsukuba, Ibaraki 305–0856, Japan
| | - Koji YOSHIOKA
- Pathology and Pathophysiology Research Division, National Institute of Animal Health, Tsukuba, Ibaraki 305–0856, Japan
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Noguchi M, Yoshioka K, Suzuki C, Itoh S, Kaneko H. An efficient protocol for inducing pseudopregnancy using estradiol dipropionate and follicular development associated with changes in reproductive hormones after prostaglandin F2alpha treatment in pseudopregnant sows. Reprod Biol Endocrinol 2011; 9:157. [PMID: 22168485 PMCID: PMC3286429 DOI: 10.1186/1477-7827-9-157] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Accepted: 12/14/2011] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND Utilization of estrus synchronization program in livestock industry would provide greater options for reproductive management in herd. To develop a convenient method for estrus synchronization in pigs, we determined the effective protocol using estradiol dipropionate (EDP) for the establishment of pseudopregnancy and investigated follicular development during the estrus synchronization with prostaglandin F2alpha (PGF2alpha) in association with reproductive hormone profiles in pseudopregnant sows. METHODS In Experiment 1, the effective dose (0, 10, 20, or 30 mg) and timing (5, 8, 11 or 13 days after ovulation) of a single administration of EDP in cyclic pigs for the induction of pseudopregnancy were investigated. In Experiment 2, four pseudopregnant sows were treated with PGF2alpha twice at a 24-h interval between 24 and 28 days after EDP treatment. The changes in plasma concentrations of reproductive hormones were analyzed by time-resolved fluoroimmunoassay. Follicular development and ovulation following PGF2alpha administration were monitored by transrectal ultrasonography. RESULTS High efficiency (greater than 80%) of pseudopregnancy was achieved with a single treatment with 20 mg of EDP at 8 and 11 days after ovulation (equivalent to 9-13 days after the onset of estrus). Plasma estradiol-17beta concentrations in pseudopregnant sows were significantly higher between 12 h and 7 days than before EDP treatment. Total inhibin concentrations significantly decreased following EDP treatment and remained low for 14 days. The number of small follicles was increased from 6.3 +/- 2.6 at PGF2alpha treatment to 22.8 +/- 4.8 at 3 days later; this was associated with increased plasma concentrations of inhibin. Onset of estrus was detectable in all sows on 5.3 +/- 0.3 days after PGF2alpha treatment and the number of ovulated follicles was 15.5 +/- 1.4 detected at 7.6 +/- 0.2 days after the treatment. CONCLUSIONS This study has defined the effective dose and timing of EDP treatment for inducing pseudopregnancy in cyclic pigs. Our results also indicated that EDP caused a lowering of inhibin concentrations during pseudopregnancy and small numbers of follicles from 20 to 28 days after EDP. In contrast, EDP-induced pseudopregnancy appears to have no adverse effect on follicular development and subsequent ovulation following PGF2alpha administration.
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Affiliation(s)
- Michiko Noguchi
- Pathology and Pathophysiology Research Division, National Institute of Animal Health, Tsukuba, Ibaraki 305-0856, Japan
| | - Koji Yoshioka
- Pathology and Pathophysiology Research Division, National Institute of Animal Health, Tsukuba, Ibaraki 305-0856, Japan
| | - Chie Suzuki
- Pathology and Pathophysiology Research Division, National Institute of Animal Health, Tsukuba, Ibaraki 305-0856, Japan
| | - Seigo Itoh
- Laboratory of Veterinary Internal Medicine, Azabu University, Sagamihara, Kanagawa 229-8501, Japan
| | - Hiroyuki Kaneko
- Animal Development and Differentiation Research Unit, National Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, Japan
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NOGUCHI M, YOSHIOKA K, SUZUKI C, ARAI S, ITOH S, WADA Y. Estrus Synchronization with Pseudopregnant Gilts Induced by a Single Treatment of Estradiol Dipropionate. J Reprod Dev 2010; 56:421-7. [DOI: 10.1262/jrd.10-006t] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Korenchevsky V, Burbank R, Hall K. The action of the dipropionate and benzoate-butyrate of oestradiol on ovariectomized rats. Biochem J 2006; 33:366-71. [PMID: 16746921 PMCID: PMC1264384 DOI: 10.1042/bj0330366] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Korenchevsky V, Hall K, Ross MA. Prolonged administration of sex hormones to castrated rats. Biochem J 2006; 33:213-22. [PMID: 16746901 PMCID: PMC1264360 DOI: 10.1042/bj0330213] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Korenchevsky V, Hall K, Burbank R. The manifold effects of prolonged administration of sex hormones to female rats. Biochem J 2006; 33:372-80. [PMID: 16746922 PMCID: PMC1264385 DOI: 10.1042/bj0330372] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Morishita T, Nozaki M, Sano M, Yokoyama M, Nakamura G, Nakano H. Changes in phospholipase A2 activity of the rabbit ampullary epithelium by ovarian steroids. Prostaglandins Leukot Essent Fatty Acids 1993; 48:315-8. [PMID: 8497492 DOI: 10.1016/0952-3278(93)90222-i] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Phospholipase A2 (EC 3.1.1.4) activity of the ampullary epithelium from rabbit oviducts was compared in the presence of various ovarian steroids to assess how they could modulate prostaglandins (PG) biosynthesis in the oviduct. The phospholipase A2 (PLA2) activity of the cells from ovariectomized rabbits (control) was 190.8 +/- 9.8 pmol/min/mg. The PLA2 activity of the cells from progesterone-treated rabbits was 156.0 +/- 41.8 pmol/min/mg and was not significantly different from the control activity. However, the PLA2 activity of the cells from the estrogen-treated rabbits was 233.5 +/- 29.0 pmol/min/mg, which was significantly higher than the control activity (p < 0.05). On the other hand, the PLA2 activity of the cells from progesterone-treated rabbits after being primed with estrogen was 116.3 +/- 25.9 pmol/min/mg, which was significantly lower than the control activity (p < 0.01). These results suggest that the effects on PLA2 activity of ovarian steroids could regulate the local production of PG which plays a role in both smooth muscle contractility and ciliary activity.
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Affiliation(s)
- T Morishita
- Department of Gynecology and Obstetrics, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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Vazquez-Alcantara MA, Menjivar M, Garcia GA, Díaz-Zagoya JC, Garza-Flores J. Long-acting estrogenic responses of estradiol fatty acid esters. JOURNAL OF STEROID BIOCHEMISTRY 1989; 33:1111-8. [PMID: 2515394 DOI: 10.1016/0022-4731(89)90417-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Estradiol esters at C-17 and C-3 with palmitic, stearic and oleic acids were chemically synthesized and then evaluated for their long-acting estrogenic responses in ovariectomized rats. The duration of the biological effects was measured after a single subcutaneous dose of 0.1 mumol of each ester and compared with those observed with 17 beta-estradiol, estradiol 3-benzoate and estradiol 17-enanthate. Vaginal citology, uterophyc action, serum gonadotropins inhibition and 17 beta-estradiol levels were measured 0, 5, 10, 20, 30 and 60 days after injection. The results disclosed that most of the estradiol derivatives evaluated exhibited a long-acting estrogenic action. However, the monoesters at C-17 showed longer effects that monoesters at C-3, while the estradiol diesters exhibited the shortest effects. In addition as shown by its low serum levels, all estradiol esters with unsaturated fatty acids show a decreased E2 absorption. The overall results indicated that esterification of E2 with long chain fatty acids provided long-acting properties to it, being higher with C-17 esters. Whether some of these compounds could be employed in substitutive endocrine therapy remains to be established.
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Affiliation(s)
- M A Vazquez-Alcantara
- Departamento de Bioquimica, Facultad de Medicina, Universidad Nacional Autonoma de Mexico, D.F
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Vázquez-Alcántara MA, Juárez-Oropeza MA, Zamora RM, Díaz-Zagoya JC, Garza-Flores J. Synthesis and biological assessment of long-acting estradiol fatty acid esters in ovariectomized rats. JOURNAL OF STEROID BIOCHEMISTRY 1985; 23:599-602. [PMID: 3935861 DOI: 10.1016/0022-4731(85)90010-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Diesters of 17 beta-estradiol using palmitic acid (16:0) and oleic acid (18:1, cis-9-Octadecenoic acid) have been synthesized for potential evaluation as long-acting compounds. Female castrated rats were injected 1 mumol of estradiol dipalmitate and estradiol dioleate, using estradiol benzoate and estradiol enanthate as controls. Biological activity was determined by uterine wet weight and uterine diameter as well as on the suppression of serum anterior pituitary gonadotropins. A delayed absorption of estradiol was observed after administration of both diesters which was well correlated with the duration of biological effects. The data demonstrate that esterification with palmitic or oleic acids at 3 and 17 positions provides long-acting properties to 17 beta-estradiol, which could be applied in substitutive therapy and or in hormonal contraception.
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Segaloff A, Gabbard RB. Structure-activity relationships of estrogens: effects of esterification of the 11 beta-hydroxyl group. Steroids 1984; 43:111-23. [PMID: 6523530 DOI: 10.1016/0039-128x(84)90063-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Fourteen esters (formate, acetate, propionate, butyrate, hexanoate, heptanoate, and benzoate) located at C-11 of 11 beta-hydroxyesterone and 11 beta-hydroxyestradiol-17 beta were synthesized and evaluated for uterotropic and gonadotropin release inhibition in rats, as well as their ability to displace (3H) estradiol-17 beta from the rat uterine cytosolic estrogen receptor. The most potent uterotropic agent was 11 beta-formoxyestrone which was 1,625 or 2,500 times as active as 11 beta-hydroxyesterone in the uterotropic or gonadotropin release inhibition assay, respectively. 11 beta-Formoxyestrone was 7.5 times as uterotropic as estradiol-17 beta and equal to estradiol-17 beta in inhibiting gonadotropin release. However, the most potent inhibitor of gonadotropin release was 11 beta-acetoxy-estradiol-17 beta which had 133% of the activity of estradiol-17 beta, although it had only 38% of the activity of estradiol-17 beta in the uterotropic assay. Esters larger than the acetoxy group showed sharply decreased activities in either assay. Despite the high estrogenic potency of the 11-formates or 11-acetates, they were rather weak (6% to 35% as active as estradiol-17 beta) in displacing (3H) estradiol-17 beta from the rat uterine cytosolic estrogen receptor.
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Hamamura M, Yagi K. Stimulation-dependent changes in synaptic effects on unit activity of medial preoptic nucleus neurones in rats. Exp Brain Res 1980; 39:121-4. [PMID: 7379882 DOI: 10.1007/bf00237076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Stimulation-dependent changes in synaptic effects were observed in medial preoptic nucleus neurones during stimulation of the amygdala or pyriform cortex in anaesthetized female rats. The changes occurred after 35--240 triple pulse stimuli repeated at 0.89 Hz. Median eminence stimulation did not produce any synaptic change. These data show the existence of synaptic plasticity in the neural pathway from the amygdala and pyriform cortex to the medial preoptic nucleus.
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Hamamura M, Yagi K. Amygdala neurones: converging synaptic inputs produced by median eminence and medial preoptic area stimulations in rats. J Physiol 1980; 300:515-23. [PMID: 7381795 PMCID: PMC1279369 DOI: 10.1113/jphysiol.1980.sp013176] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
1. Amygdaloid afferent inputs from the median eminence and the medial preoptic area were studied electrophysiologically in urethane-anaesthetized female rats.2. Stimulation of the surface of the median eminence produced orthodromic responses in about 80% of the forty-seven amygdala units tested and about 65% of the responsive cells showed an excitation.3. Stimulation of the ipsilateral medial preoptic area orthodromically excited seventeen and inhibited twenty of the forty-nine units tested.4. Stimulation of the contralateral medial preoptic area evoked orthodromic excitation in nine and inhibition in three of the twenty-two units tested. These stimuli were ineffective for producing antidromically conducted impulses in the tested units.5. Sixteen of the thirty amygdala units tested for responses to both median eminence and ipsilateral medial preoptic area stimulation responded orthodromically with either excitation or inhibition. The latency of the response to median eminence stimulation was approximately equal to that of the response to ipsilateral preoptic area stimulation in four of these sixteen units.6. A characteristic bursting discharge was observed in eleven amygdala units during and after ipsilateral preoptic area stimulation. A transitory inhibition was evoked simultaneously with the bursting discharge in some units. Seven of the eleven units were also tested for median eminence stimulation, and a transitory excitation was observed in each of these units.7. These results suggest the existence of converging synaptic inputs both from tuberoinfundibular neurones and the ipsilateral medial preoptic area to certain amygdala neurones. They also demonstrate the existence of a specific neural pathway mediating a characteristic self-sustained bursting discharge in some amygdala neurones after such stimulation.
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GROSS F, TSCHOPP E. Über einen neuen, langwirkenden Ester des Desoxycorticosterons. ACTA ACUST UNITED AC 1952; 8:75-6. [PMID: 14945414 DOI: 10.1007/bf02139031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Greene RR, Burrill MW, Ivy AC. Experimental intersexuality. The effects of estrogens on the antenatal sexual development of the rat. ACTA ACUST UNITED AC 1940. [DOI: 10.1002/aja.1000670206] [Citation(s) in RCA: 111] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Pencharz RI. EFFECT OF ESTROGENS AND ANDROGENS ALONE AND IN COMBINATION WITH CHORIONIC GONADOTROPIN ON THE OVARY OF THE HYPOPHYSECTOMIZED RAT. Science 1940; 91:554-5. [PMID: 17789507 DOI: 10.1126/science.91.2371.554] [Citation(s) in RCA: 55] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Dorr EM, Greene R. Treatment of the menopause with estradiol dipropionate. Am J Obstet Gynecol 1939. [DOI: 10.1016/s0002-9378(39)90763-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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DODDS EC, GOLBERG L, LAWSON W, ROBINSON R. Œstrogenic Activity of Esters of Diethyl StilbÅ"strol. Nature 1938. [DOI: 10.1038/142211b0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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