• Proceedings of the Korean Society of Applied Pharmacology
• /
• 1992.05a
• /
• pp.55-55
• /
• 1992

다환상 방향족탄화수소류인 3-methylcholanthrene 이 자궁에 미치는 영향을 연구하고자 자궁의 성장에 미치는 영향과 에스트로겐 수용채와의 상호작용을 조사하였다. 3-Methylcholanthrene 단독 투여군은 대조군에 비해 투여 용량에 관계없이 유의성있는 자궁 무게의 변화를 나타내지 않았으나 diethylstilbesterol과 3-methylcholanthrene 병용 투여군에서는 diethylstilbesterol 단독 투여군에 비해 자궁 무게가 병용 투여한 3-methylcholanthrene 용량에 의존적으로 감소하였다. 안티에스트로갠인 tamoxifen이 자궁 성장에 미치는 영향을 관찰하기 위하여 tamoxifen단독 투여시에는 자궁 무게가 대조군에 비해 약간 증가하여 (p<0.05)부분 효능 작용을 나타냈으나 diethylstilbesterol과 동시 투여시에는 diethylstilbesterol에 의한 자궁 무게 증가가 감소되었으며 그 감소 정도는 병용한 tamoxifen 용량에 의존적이었다. Diethylstilbesterol과 3-methylcholanthrene 및 tamoxifen을 병용 투여했을때 diethylstilbesterol에 3-methylcholanthrene만을 병용 부여하였을 때보다 diethylstilbesterol에 의한 자궁 성장이 유의적으로 (P<0.01)감소되었다. Diethylstilbesterol과 3-methylcholanthrene의 병용 투여군에서는 투여한 후 시간이 경과함에 따라 diethylstilbesterol 단독 투여군에 비해 일정한 비율(23.6=3.9％)로 자궁 무게 증가가 억제되었다.

• Clinical and Experimental Reproductive Medicine
• /
• v.12 no.2
• /
• pp.71-79
• /
• 1985

Systemic extrogen therapy promotes multiple preantral follicular development in immature mice. Estrogen pretreated ovaries might therefore be a useful source of cells for in vitro studies of oocytes maturation. Silastic capsules (5.0 mm length; 3.18 mm outer diameter, 1.57 mm inner diameter) filled with diethylstilbesterol were implanted subcutaneously in experimental mice (ICR) for up to 6 days. Ovarian weight and histology in diethylstilbesterol pretreated and control animal were assessed before and after pregnant mare serum gonadotrophin treatment and after human chorionic gonadotrophin. The following results were obtained; 1. Ovarian weight was significantly increased by 6 days of diethylstilbesterol pretreatment. Subsequent ovarian weight gain in response to pregnant mare serum gonadotrophin and human chorionic gonadotrophin was increased. 2. Diethylstilnbesterol pretreatment stimulated the developed healthy preantral follicles. 3. Forty eight hours after pregnant mare serum gonadotrophin treatment, a larger number of the antral follicles which developed in diethylstilbesterol pretreated animals showed signs of atresia, whereas in the control ovaries there was a higher incidence of premature luteinization. 4. Forty eight hours after human chorionic gonadotrophin, numerous corpora lutea and occasional luteinized unruptured follicles were present in both control and diethylstilbesterol ovaries. 5. Ovulation rate, fertilization rate and subsequent preimplantation development in vitro were not adversely affected by diethylstilbesterol pretreatment. However, there was considerable variation in the ovulation rate the number of animals with more than 60 ovulations was greater in the diethylstilbesterol gorup (52.4%) as compared to the control (33.3%).

• Journal of Food Hygiene and Safety
• /
• v.5 no.4
• /
• pp.179-186
• /
• 1990

This study was performed for assessing carcinogenicity of several synthetic hormones; Diethylstilbesterol (DES), 17-ethinylestradiol ($EE_2$) and Bovine somatotrophin (BST). Six weeks old F344 rats were divided into five groups and given an intraperitoneally injection of 200 mg of diethylnitrosamine (DENA). At two week after beginnig of experiment, DES, $EE_2$, BST. Phenobarbital were administered to group 1, 2, 3 and 4 respectively, group 4 is positive control and group 5 is negative control. At the same time, all groups received a single i.p. injection of D-galactosamine at a dose of 300 mg/kg and underwent 2/3 partial hepatectomy at week 5. All rats were sacrificed at the end of week 8 for assessment of liver lesion development. The liver was processed for immunohistochmical staining for GST-P and quantitatively analyzed by image analyzer. It was concluded that two synthetic estrogen hormones (DES, $EE_2$) was different significantly (p < 0.01) but BST was not different as compared with control group. Therefore, we thought that DES, $EE_2$ was promoting effects and BST was not in rat hepatocarcinogenesis.

• Archives of Pharmacal Research
• /
• v.16 no.4
• /
• pp.276-282
• /
• 1993

This study has been undertaken to examine the effect of 3-methylcholanthrene (3MC) on rat uterine growth and to understand the mechanism of action of 3MC in rat uterus. After diethylstilbesterol(DES) or tamoxifen(TAM) or 3MC or DES plus TAM or DES plus 3MC was administered into immature female rats, uterine weight over corn oil-treated uteri. 3MC treatment had no effect on uterine weight but, DES stimulated uterine weight was inhibited by 3MC concomitant tratment. While TAM alone treatment showed slight increase in uterine wieght, inhibited uterine growth simulated by DES when it was adiministrated with DES condirect binding assay with $[^3H]$ estradiol and the relative binding affinities of 3MC and TAM were estimated by competetion assy. Estradiol tumed out to have high affinity for rat uterine estrogen receptor (kd = 0.4 nM). The relative binding affinities of TAM and 3MC were 1% and 4.7% that of DES for rat uterine estrogen receptor, respectively. 3MC was shown to have similar affinity for eat uterine estrogen receptor to that of TAM. Effects of DES 3MC and TAM administration in vivo on rat uterine estrogen recptor level were examined. It was confirmed that the estrogen, DES and antiestrogen, TAM decreased estrogen receptor levels from rat ulterus and also 3MC decreased rat uterine estrogen receptor level when rats were treated with DES, TAM and 3MC in vivo. Data indicates that 3MC acts as an antiestrogen mediated through estrogen receptor system.

• Journal of Veterinary Clinics
• /
• v.28 no.2
• /
• pp.258-261
• /
• 2011

An 8-year-old spayed female, Yorkshire terrier dog was presented with a urinary incontinence. Unaware urine dribbling during sleeping was observed eight months after spaying. Polyuria and polydipsia were also reported. Physical examination revealed obesity and hypertension. Characteristic laboratory findings in this dog were polycythemia, hyperlipidemia and elevated hepatic enzyme. Other causes of the urinary incontinence were ruled out through further diagnostic tests and spay-related urethral sphincter mechanism incompetence (USMI) was made as a presumptive diagnosis. In addition, the dog was also diagnosed with pituitary-dependent hyperadrenocorticism. Both conditions can cause urinary incontinence in dogs; therefore, definite diagnosis was made through a therapeutic approach. The synthetic estrogen, diethylstilbesterol, was initially administered and successfully managed the urinary incontinence in this dog. To the best of the author's knowledge, this is the first case report describing the clinical and laboratory features of spay-related USMI concurrent with hyperadrenocorticism and treatment outcomes in our country.