• Korean Journal of Veterinary Research
• /
• v.32 no.1
• /
• pp.15-24
• /
• 1992

The effects of CC the ovulatory response, oocyte normality, ovarian steroidogenesis and subsequent embryo developmental potential were examined in PMSG-treated rats. On Days of 25~27 of age, immature female Sprague Dawley rats were treated with three different doses(0.05, 0.1 or 1.0mg /day) of clomiphene citrate or vehicle. The females subsequently received 4IU PMSG on Day 28 and/or 10IU hCG on Day 30, and were killed on Day 31. Some females given 0.1mg CC or vehicle with 4IU PMSG were then mated and killed on Days 2, 3, 4 and 5 of pregnancy. Compared to vehicle(control) group, by increasing the doses of CC, there were a significant decrease in the ovulatory response as judged by both the proportion of rats ovulating and the mean number of oocytes per rat and a marked reduction of ovarian weight. The increasing doses of CC substantially promoted the degeneration(%) of oocytes ovulating in a dose-dependent manner. The CC-mediated inhibitions of the ovulatory response and ovarian weight were oompletely overcome by a subsequent treatment of hCG. Increasing doses of CC resulted in a siginificant elevation of serum estradiol with the decreased levels of progesterone and androgens. The additive treatment with hCG was effective to reduce the elevation of estradiol and to increase the reduction of progesterone produced by high dose(1.0mg) of CC. The preimplantation embryos recovered from 0.1mg CC-treated pregnant rats demonstrated a progressive early loss from Day 3 of pregnancy with a significant increase in the percentage of degeneration during all periods examined, compared to controls. The rate of progressive embryo cleavage in the CC-treated rats were slower than that in controls from Day 3 of pregnancy. Additionally, the percentage of the cleaved embryos recovered from the CC-treated rats remained significantly lower consistently from Day 2 of pregnancy, compared to control regimen. These results demonstrate a possible mechanism of CC-mediated inhibition of ovulatory response in the rats which may include the attenuation or blockade of the endogenous secretion of gonadotropins and also suggest that its detrimental effects observed on oocyte normality and embryonic development may be caused by abnormal follicular steroidogenesis( especially elevated estradiol) preceding fertilization.

• Korean Journal of Biological Psychiatry
• /
• v.6 no.2
• /
• pp.235-239
• /
• 1999

Objectives : The purpose of this study was to evaluate the difference of depressive symptoms and attention between estrogen user and non-user in postmenopausal women. Methods : 30 Estrogen users and 30 non-users were participated in this study. They were all menopausal for at least 1 year and have 12 or more education years. We used BDI(Beck depression inventory), digit span and digit symbol to evaluate depressive symptoms and attention in both groups. We also measured the plasma estradiol level and identified the correlation between estradiol level and BDI, digit span and digit symbol. Results : The demographic data was not different between both groups. Estrogen users scored higher than non-users in digit span(forward) and lower than non-users in BDI. The correlation between estradiol level and BDI, digit span and digit symbol was not significant. Conclusion : Estrogen replacement therapy was effective in alleviating depressive symptoms but ineffective in improving attention in postmenopausal women.

• Clinical and Experimental Pediatrics
• /
• v.51 no.3
• /
• pp.256-261
• /
• 2008

Purpose : Leptin and adiponectin are two representative adipocytokines. Leptin increases, but adiponectin decreases, with obesity and insulin resistance. We aimed to study the relationship between the leptin/adiponectin ratio and insulin resistance in healthy children. Methods : Seventy-seven healthy children (36 boys and 41 girls) were enrolled in this study. Anthropometric measurements were performed, and the percentage of weight for height (%WFH) was calculated in each subject. Fasting plasma levels of glucose, insulin, leptin, adiponectin, testosterone, estradiol, and sex-hormone binding globulin (SHBG) were measured. The free androgen index (FAI) was used as a representative of testosterone bioactivity. The homeostasis model assessment was used to estimate the degree of insulin resistance (HOMA-IR). Results : In the boys, HOMA-IR was significantly correlated with age, pubertal stage, free androgen index (FAI), leptin, and the leptin/adiponectin ratio. HOMA-IR was also significantly related to age, percentage of weight for height (%WFH), pubertal stage, estradiol, leptin, and the leptin/adiponectin ratio in girls. The leptin/adiponectin ratio was independently related to HOMA-IR after adjusting for age, %WFH, and FAI in the boys (P<0.05). The leptin/adiponectin ratio was not independently related to HOMA-IR after adjusting for age, %WFH, and estradiol in girls. Conclusion : In non-obese healthy children, the leptin/adiponectin ratio was significantly correlated with insulin resistance. The leptin/adiponectin ratio was independently related to insulin resistance even after adjusting for age, degree of obesity, and androgen levels in healthy boys.

• Journal of Pharmaceutical Investigation
• /
• v.25 no.1
• /
• pp.47-54
• /
• 1995

Transdermal patch formulations of estradiol to treat post-menopausal symptoms and prevent osteoporosis in women were developed and evaluated for the permeation characteristics through the excised hairless mouse abdorminal skin and the uterotropic effect on the ovariectomized rabbits. The design of patch formulations was optimized by varying several formulation parameters, such as type of enhancers, amount of enhancers, amount of drug loading and coating thickness. Compared to a commercially available transdermal product, several patch formulations showed the similar skin permeation profiles (following zero-order kinetics), but their skin permeation rates were lasted for the longer period (a week). In one-week uterotropic efficacy test in the ovariectimized rabbits, the selected patch formulations showed the positive effect in atrophy of the urogenital epithelium. The mean values of uterus weight in rabbits after application of patches containing estradiol were much higher than those in control group (containing no drug).

• Reproductive and Developmental Biology
• /
• v.35 no.3
• /
• pp.215-219
• /
• 2011

Acyl-CoA synthetase 4(ACSL4) is an arachidonate-preferring enzyme abundant in steroidogenic tissues and postulated to modulate eicosanoid production. The human and mouse ACSL4 gene are mapped on chromosome X. The female mice heterozygous for ACSL4 deficiency became pregnant less frequent1y and produced small litters, with 40% of embryos surviving gestation. In this study, we examined the regulation of ACS4 by estradiol-$17{\beta}$ and progesterone (P4) in the human endometrial cancer cell line HTB-1B. ACSL4 mRNA was increased in a dose-dependent manner. Also, expression of ACSL4 gene was up-regulated in a time-dependent manner in HTB-1B cells. However, combined treatment with progesterone and estradiol-$17{\beta}$ modestly decreased the levels of ACS4L mRNA as compared with the estradiol-$17{\beta}$ and progesterone respectively. Overall, these results suggest that the ACSL4 gene is regulated by progesterone and estradiol-$17{\beta}$ in the HTB-1B cells.

• Clinical and Experimental Pediatrics
• /
• v.51 no.6
• /
• pp.634-639
• /
• 2008

Purpose : There has been considerable disagreement regarding the most appropriate dosage of gonadotropin-releasing hormone agonist in cases of central precocious puberty. The aim of this study was to determine the appropriate dosage for suppression of the puberty in girls with central precocious or early puberty. Methods : Twenty-two girls with early puberty were randomly subjected to 3 types of dosages of leuprolide acetate for at least 6 months. The number of cases in groups 1, 2, and 3 were 7, 7, and 8, and dosages were 70, 90, and $110{\mu}g/kg/-month$, respectively. Height, weight, bone age, Tanner stage of breast development, and serum levels of LH, FSH, estradiol, and progesterone were measured before treatment and after 6 months of treatment. The number of cases of puberty suppression was compared using a modified puberty suppression score with a nonparametric chi-square test. Results : There were no significant differences of chronologic and bone ages among the groups. There was a significant decrease in height SDS gain after 6 months in group 3 (P<0.05) compared with groups 1 and 2. Serum levels of LH, FSH, estradiol and progesterone were all significantly decreased after treatment in all 3 groups (P<0.05). The number of cases of puberty suppression in each group were 4 (57%), 5 (71%), and 8 (100%). There was a significantly increased proportion of suppression of puberty in group 3 (P<0.05). Conclusion : It was necessary to use a higher dose of gonadotropin-releasing hormone agonist to suppress early puberty in girls; however further longitudinal study will be needed for their prognosis of final adult height.

• Journal of Digital Convergence
• /
• v.12 no.9
• /
• pp.283-290
• /
• 2014

Recently, As the prevalence of precocious is increased in Korea This study was evaluated the physical growth and female sex hormone characteristics of girls with Idiopathic precocious puberty. Retrospective analysis about the medical record of 113 girls for evaluation of signs of precocious puberty except for organic causes was done. Physical growth features and Female sexual hormone were analyzed. Height SDS and Weight SDS were significantly increased in true sexual precocity compared to pseudo sexual precocity. Hormone studies showed that the level of basal LH, FSH, E2 was significantly higher in true precocious puberty. The finding of this study suggest that we need to develop intervention about physical and psychological problems for precocious puberty girls.

• Korean Journal of Biological Psychiatry
• /
• v.2 no.1
• /
• pp.91-99
• /
• 1995

A on-off study was designed to evaluate the effects of addition of transdermal esrtradiol to tricyclic antidepressants on depression level, vasomotor symptom(hot flush), sexual functions and hormonal status, plasma 5-hydroxyindoleascetic acid(5-HIAA) level in postmenopausal women with depression. Plasma level of estradiol, progesterone, LH, FSH, prolactin and 5-HIAA was measured by Time-resolved fluoroimmunoassay and HPLC(High Performance Liquid Chromatography). To asses their symptoms, the BDI(Beck Depression Inventory) and modified symptom scale, extracted from women's health questionnaire were used. Depression score, sexual function score were decreased by the last 4-weeks of addition of transdermal estradiol to antidepressant treatment, not Significant, but vasomotor symptom (hot flushes) score was decreased significantly(p<0.05) by the last 4-weeks of the given treatment. Thus, during addition of transdermal estradiol to antidepressants treatment, only vasomotor symptom(hot flushes) was improved significantly, but depression level was not changed in postmenopausal women with depression. Plasma FSH, estradiol and prolactin level was not changed in postmenopausal women with depression. Plasma FSH, estradiol and prolactin levels were increased by the last 4-weeks of the treatment. There were not significant correlations between clinical symptoms and plasma hormonal status and 5-HIAA level in baseline. After the last 4-weeks of transdermal estradiol treatment, the change of depression score was correlated significantly with change of serum prolactin and 5-HIAA level and the change of vasomotor symptom score was correlated significantly with the change of plasma prolactin level.

• Development and Reproduction
• /
• v.15 no.2
• /
• pp.167-172
• /
• 2011

To monitor the reproductive patterns of endangered common chimpanzee including annual reproductive cycle, amenorrhea, breeding season, and pregnancy diagnosis, Time-Resolved Fluorescence Immuno Assay (TR-FIA) was used to trace MRH (estradiol, progesterone, testosterone) and human chorionic gonadotropin (HCG). In result of this research, age was not the important factor in determining the reproduction capability in common chimpanzee; it was rather greatly influenced by the combination of various factors such as individual's fertilizing ability, presence of obstetrical diseases, the pattern of mating behavior, and the mental communication under the introduction of a mating partner. This research will play an important role in operating conservation project for common chimpanzees and can be extended also for shedding new light on understanding human menopause and obstetrical diseases.

• Korean Journal of Veterinary Service
• /
• v.40 no.4
• /
• pp.253-258
• /
• 2017

The aim of this study is to develop an optimal analytical method for gonadorelin, progesterone, oxytocin and estradiol, the major components of hormones. A relatively simple and reproducible method using high performance liquid chromatography was developed and as a result of the measurement of specificity, linearity, repeatability, accuracy and intermediated precision, the validity of the developed method was verified with the result of meeting the verification criteria of analytical method validation. Using this newly developed method, 12 post-market veterinary products were tested and the ingredient content were 91.9~116.4%, which satisfied the 90~120% condition of the administrative measure standard. Therefore, if the newly developed method is used for the collection examination of hormone in veterinary medicine, it can be useful as an approved test method.