• The Korean Journal of Physiology
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• v.8 no.1
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• pp.1-6
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• 1974

Rana pipiens의 난자운반은 섬모운동에 의하여 이루어지며 섬모운동은 배란시에 분비되는 난소호르몬에 의존하는 것으로 알려져 왔다. 저자는 이러한 난자운반이 순전히 난소호르몬에 의존하는가 난소호르몬 이외의 기타 호르몬이 관여하는 것인가 또는 난소호르몬 없이도 수행될 수 있는가를 알아보려고 본 실험을 시도하였다. 난관 적출된 개구리에 배란을 유도시켜 얻어진 복강난자를 난소적출을 실시한 암 Rana pipiens의 복강내에 이전시킨 대조군과 이전 직후 뇌하수체, 뇌하수체와 progesterone, progesterone, FSH, LH 또는 estrogen 등을 각각 주사시킨 각 호르몬 투여군의 6군으로 나누고 이식한 난자들에 대한 각 호르몬의 효과를 관찰하여 아래와 같은 결과를 얻었다. 1. 난소적출 Rana pipiens에 배란된 난자를 이식시키면 이식체내에서 난자운반이 진행되었다. 2. Progesterone, estrogen, FSH, LH 및 progesterone과 뇌하수체 호르몬 투여군의 난자운반은 대조군과 비슷한 현상을 보여 주었으므로 이들이 섬모운동에 직접 관여하는 것으로 보여지지 않았으나 뇌하수체 호르몬은 섬모운동과 난관투입에 유효한 영향을 미치었다. 3. 난자의 난관으로의 진입은 복강내에 난자수가 일정량(약 200)에 다달아야 이루어졌다. 4. 난소적출 개구리에서의 난자운반 진행상황으로 보아 난소가 섬모운동, 난자운반을 촉진하는 것으로 보이지 않았으며 섬모운동을 일으키는 요인은 복강내에 있는 난자 자체가 어떤 액성물질을 분비하는 것으로 고찰하였다.

• 대한생식의학회:학술대회논문집
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• 2006.11a
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• pp.67-80
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• 2006

비만 특히 복부비만은 여성의 임신 및 출산에 많은 악영향을 미친다. 비만이 가임력에 영향을 미치는 기전은 명확히 밝혀지지는 않았지만, functional hyperandrogenism과 insulin resistance에 수반된 hyperinsulinemia가 중요한 역할을 하리라 여겨진다. 또한 지방조직은 활발하게 대사 작용이 일어나는 장소로서 steroid hormone을 modification 시키고, 여러 가지 adipokine들을 분비시키는데 이런 지방조직의 분비물들은 생식계에 영향을 미친다. 비만이 생식계에 미치는 영향은 간략히 다음 표와 같이 정리할 수 있다 (Table 3). 특히 PCOS 환자에서 비만은 hyperinsulinemia에 의한 난소의 steroidogenesis 증가와 SHBG의 감소에 연관되어 hyperandrogenism 과 무배란의 원인으로 작용한다. 비만은 약물에 의한 배란유도 및 체외수정의 성공률 또한 떨어뜨리며， 임신이 되더라도 자연 유산, 조산, 임신성 당뇨, 임신성 고혈압 등의 위험은 높인다. 이와 같이 최근 급격히 증가하는 비만은 여성의 건강 특히 생식계에 많은 문제를 야기시킨다. 특히 청소년기의 비만은 성인이 된 뒤 PCOS로 발전하여 불임, 심혈관 질환 등과 같은 많은 합병증을 일으킬 수 있으므로 세심한 주의를 기울여야 하겠다.

• Tuberculosis and Respiratory Diseases
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• v.44 no.3
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• pp.684-691
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• 1997

1be ovarian hyperstimulation syndrome is a rare but serious complication of ovulation induction therapy with gonadotropin. The clinical manifestations are generalized edema, ascites with pleural effusion and may become life-threatening in severe cases. The pathophysiology is still unknown, therefore, the treatment should be symptomatic and conservative. We report a case of severe OHSS with massive right pleural effusion in excess of ten liters after human menopausal gonadotropin therapy because of secondary infertility. Fluid and electrolyte imbalances were corrected and albumin was administered. A right chest tube was placed for a total of sixteen days, draining eleven liters of pleural effusion totally, resulting a dramatic decrease of pleural effusion and improvement of symptoms.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.30 no.2
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• pp.203-210
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• 1997

The aim of this study was to determine the effect of steroids and human chorionic gonadotropin (HCG) on in vitro maturation and ovulation of oocyte in Pseudobagrus fulvidraco. Oocytes were incubated in the media Leibovitz L15 supplemented with the various concentration of $17\alpha,\;20\beta-dihydroxy-4-pregnen-3-one(17\alpha20{\beta}OHP),\;17\alpha-hydroxyprogesterone(17{\alpha}OHP),\;progesterone(P_4),\;estradiol-17\beta(E_2)and\;HCG$. After 60 hours incubation, the maturation ability of oocyte was assessed by the appearance of germinal vesicle breakdown (GVBD). GVBD was significantly enhanced by the addition of $17\alpha20{\beta}OHP,\;17{\alpha}OHP,\;P_4\;and\;HCD(P<0.05)$. The highest CVBD was observed when $17\alpha20{\beta}OHP$ and HCG were supplemented to media. When oocytes were cultured for 16 hours in media containing $10\~1,000\;ng/ml\;17\alpha20{\beta}OHP,\;17{\alpha}OHP\;and\;P_4$, the rate of GVBD in oocytes cultured in the medium supplemented with 100 ng/ml $17\alpha20{\beta}OHP(65\%)$ was significantly higher than that with $17{\alpha}OHP\;(40\%)\;and\;P_4(35\%)$. The efforts of $17\alpha20{\beta}OHP$ and HCG on GVBD were assessed by various concentration of these hormones. When oocytes were cultured for 60 hours in various media containing $1\~1,000\;ng/ml\;17{\alpha}20{\beta}OHP\;or\;5\~1,000\;IU/ml$ HCG, the GVBD of oocytes was significantly increased in the medium with $10\~100\;ng/ml\;17\alpha20{\beta}OHP$ and 500 IU/ml HCT. When oocytes were cultured in the various media supplemented with $1\~1,000\;ng/ml\;17\alpha20{\beta}OHP\;or\;5\~1,000\;IU/ml$ HCG for 60 hours, the media with $1\~100\;ng/ml\;17\alpha20{\beta}OHP\;or\;50\~1,000IU/ml$ HCG significantly increased in the rate of ovulation. However supplementation with $1,000\;ng/ml\;17\alpha20{\beta}OHP$or 5 IU/ml HCG did not improve the rate of ovulation compared to controls. This results indicate that supplementation of steroid and HCG except $E_2$ can improve the in vitro maturation and ovulation of oocyte in P. fulvidrac; HCG and $17\alpha20{\beta}OHP$ may be more effective than other steroids on oocyte maturation and ovulation in P. fulvidraco.

• 대한생식의학회:학술대회논문집
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• 2007.11a
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• pp.145-145
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• 2007

• 대한생식의학회:학술대회논문집
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• 1995.12a
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• pp.71-72
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• 1995

• Clinical and Experimental Reproductive Medicine
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• v.37 no.3
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• pp.261-266
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• 2010

Diagnosis of heterotopic pregnancy could be delayed because of insufficient clinical symptoms. Many clinician mistook the symptoms associated with ectopic pregnancy for the symptoms of complicated normal intrauterine pregnancy. The incidence of heterotopic pregnancies has been increased because of the use of various ovulation induction and assisted reproductive technologies. We experienced a case of bilateral tubal pregnancies and intrauterine twin pregnancy in polycystic ovary syndrome woman conceived after ovulation induction by clomiphene citrate. We report this case with a brief review of the literatures.

• Korean Journal of Animal Reproduction
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• v.20 no.4
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• pp.379-384
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• 1997

Superovulation with exogenous gonadotropins creates a spectrum of pre or periovulatory hormonal changes with subsequent detrimental effects on oocyte quality, fertilization, embryo development, implantation and maintenance of pregnancy. Our recent study determined potential roles for insulin-like growth factor-1 (IGF-1) in uterine environment regulation and preimplant tation in the rat. The evidence indicates that IGF-l may play an important role in the main tenance of a receptive uterine environment for embryonic development and the regulation of decidualization. Embryonic loss and failure of implantations following superovulation may be partially attributed to disturbances in uterine IGF-l action as observed in this study. We investigated the effects of superovulatory doses of gonadotropins on frequency of chromosomal a abnormalities of mouse embryos. Chromosome a analysis of mouse zygotes and 8- to 16-cell stage embryos from spontaneously ovulated, 5, 10, and l 15 lU pregnant mare serum gonadotropin (PMSG) superovulated mice was carried out. Aneuploidy, polyploidy and structural chrom- osomal abnormalities were detected among the four groups. However, only polyploidy was correlated with superovulation. In 10 and 15 IV PMSG treated groups, the rate of polypoidy was 2.9% and 10.5%, respectively. Furthermore, there was a dose reponse relationship between the PMSG dose and the incidence of embryonic p polyploidy (P

• Clinical and Experimental Reproductive Medicine
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• v.35 no.2
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• pp.111-118
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• 2008

Objective: The purpose of the present study was to examine the hormonal regulation of RGS-2 in the rat ovary. Methods: Immature rats were injected with 10 IU of PMSG to induce multiple growth of preovulatory follicles and 10 IU of hCG to induce ovulation. Northern blot analysis performed for gene expression and in situ hybridization performed for mRNA localization. Results: Northern blot analysis revealed that pregnant mare's serum gonadotropin (PMSG) treatment did not affect RGS-2 mRNA levels. In contrast, human chorionic gonadotropin (hCG) treatment of PMSG-primed rats resulted in an increase in RGS-2 expression within $1{\sim}3\;h$. The major cell-types expressing RGS-2 mRNA were oocytes regardless of follicle size. Interestingly, hCG treatment caused the stimulation of RGS-2 gene expression in granulosa cells of preovulatory and growing follicles. In contrast, cell types expressing RGS-2 protein were theca cells regardless of hCG treatment. Like in vivo, treatment of preovulatory granulosa cells with LH in vitro stimulated RGS-2 levels within 1 h. Interestingly, GnRH antagonist II enhanced the stimulatory action of LH. Conclusion: The present study demonstrates the LH/hCG induction of RGS-2 in preovulatory granulosa cells and suggests a role of RGS-2 in Gq protein signaling pathway during ovulation.

• 대한생식의학회:학술대회논문집
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• 1997.11a
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• pp.45.2-46
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• 1997