• Korean Journal of Veterinary Research
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• v.15 no.1
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• pp.5-8
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• 1975

난소를 제거한 가토에 있어서 부신에서 분비되는 oestrogen이 착상에 충분할 가능성이 있음에 비추어 이 실험에서는 가토에서 oestrogen의 근원이 되는 난소와 부신을 함께 제거하여도 착상이 여전히 일어나며 임신이 유지되는가를 실험하였다. 이 실험결과는 다음 두가지 점을 밝혀주었다. 1. 부신에서는 가토의 착상에 충분한 oestrogen을 분비하지 아니하였다. 2. 가토의 착상과 임신유지는 oestrogen 없이도 가능하였다.

• Korean Journal of Animal Reproduction
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• v.20 no.4
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• pp.423-426
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• 1997

난 발생 및 난 성숙을 위한 난소내의 제어기능의 이해는 흥미로운 연구대상이다. 그러나, 난포에 의하여 지엽적으로 분비된 어떤 스테로이드 물질도 난 발생 및 난 제어를 위해 관여하지 않는 것으로 알려져있다. 따라서, 난소내의 조절인자가 어떻게 난 발생 및 난 성숙을 위해 작용하는지를 구명하는 것은 난 발생 및 난 성숙을 위해 매우 중요한 연구과제라 할 수 있다. 본 총설에서는, 본 연구실의 최근의 업적을 중심으로 포유동물의 난 발생과 난 성숙을 위한 난소내의 조절인자에 대하여 정리하였다.

• Journal of Embryo Transfer
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• v.5 no.2
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• pp.28-37
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• 1990

Dihydrotestoterone (DHT)은 난소내 폐쇄를 유발한다고 보고 되었으나, 반대로 폐쇄를 억제한다는 상반된 주장이 있어왔다. 본 연구는 난소내 폐쇄되는 기작을 밝히는 연구의 일환으로 흰쥐의 DHT를 처리하여 난포가 폐쇄되는지 여부와 폐쇄된다면 스테로이드 수용체, 특히 에스트라디올 수용체에 어떠한 영향을 주는지를 조사하고자 하였다. 미성숙 흰쥐의 뇌하수체를 절제(HPX)하고, 35IU의 PMSG 처리후 Dihydrotestoterone enathate (DHTE)를 lmg-5mg/kg 체중 농도로 처리하여 난포의 폐쇄여부를 조직학적으로 검경하였다. PMSG,PMSG-DHTE 공히 강소를 형성한 난포의 acid phosphatase 활성도를 증가시켰고, 또한 난포의 폐쇄를 유발하였다. 흰쥐의 난소내 estrogen receptor (ER)의 수는 과립세포에서도 세포질내 ER은 핵내로 이용되는 것을 확인하였다. 또한 DHTE는 난소내 ER의 농도를 감소시켰다. 이 결과로 보아 난포내 DHTE는 ER의 농도를 감소시켜 폐쇄를 유발하는 요인으로 작용할 것이라는 결론을 얻었다.

• Proceedings of the Korean Society of Developmental Biology Conference
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• 2001.08a
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• pp.42-44
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• 2001

연중 밀어 (Rhinogobiw brumeu)의 생식소 성숙을 조사하였다. 난소 및 정소의 성숙은 체장 60 mm 이상의 개체에서 뚜렷하였다. 난소는 원추형이며 정소는 쐐기모양으로 복강의 등쪽에 위치한다. 연중 성성숙지수 (gonadosomatic index)의 변화는 암컷 0.19 - 14.28 수컷 0.15-13.34로 산란시기는 5월 하순부터 6월 초순의 하계번식 어류로 사료된다. 성숙기에서 산란기에 이르는 동안 난소내 난자의 성숙정도는 불균질하며 전체 밀어 군집내에서 7월 하순까지도 성성숙지수 (GSI)가 비교적 높게 유지되는 것으로 보아 1차 산란 이후에도 소규모의 산란이 하계에 걸쳐 진행되는 것으로 사료된다. 생식소의 발달은 동계에 시작되어 난소내 난자는 춘계와 하계에 걸쳐 성장이 일어나 지름 0.5 mm의 성숙난자를 형성한다. 이 시기의 정소는 성숙한 정자가 세정관내를 가득 채우고 있다. 정자의 길이는 45 um 이며 두부의 직경은 5 um이며 미토콘드리아를 갖는 중편이 두부 기저부에 함입된 형태이며 첨체를 갖지 않는다.

• Journal of Life Science
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• v.15 no.5 s.72
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• pp.834-839
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• 2005

The aim of this study was to evaluate the effects of three different mulberry cultivars extracts on serum lipid contents in ovariectomized estrogen-deficient rats. Sprague-Dawley female rats were randomly assigned to the following groups: sham-operated rats (sham), ovariectomized control rats (OVX-control), ovariectomized rats supplemented with $ 80\% $ ethyl alcohol extracts from various kinds of Tajikistan mulberry (OVX-TM), Korea mulberry (OVX-KM) and China mulberry (OVX-CM) at 200mg/kg bw/day, respectively. The mulberry extracts were orally administrated at 1mL per day. The body weights of OVX rats were significantly heavier than the sham-operated rats at all values (p <0.05). The ovariectomy caused an expected increasing in the levels of serum total cholesterol and triglyceride. The serum HDL-cholesterol level on the OVX-TM, OVX-KM and OVX-CM groups were higher than in the OVX-control group.

• Journal of the Korean Society of Food Science and Nutrition
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• v.33 no.2
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• pp.324-330
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• 2004

The purpose of this study was to investigate the effects of Porphyra tenera (PT) extracts on formation of collagen cross-link in ovariectomized rats. From day 3 until 42 after the ovariectomy, Sprague-Dawley female rats were randomly assigned to the following groups : sham-operated rats (Sham), ovariectomized control rats (OVX-control), ovariectomized rats supplemented with PT at 50 mg/kg bw/day (OVX-PT5O), 200 mg/kgbw/day (OVX-PT200). The PT ethanol extracts were orally administrated 1 mL per day. Body weight gain, food intake and food efficiency ratio were significantly different among the groups. The change of collagen content was studied in lung, bone, cartilage and skin of ovariectomized rats. The effects of PT extracts on the amount of collagen were examined by measuring the hydroxyproline, which is a specific amino acid existing in collagen. Pyridinoline is pyridinium cross-link formed in the mature form of collagen from lysine and hydroxylysine residues. Pyridinoline content was analyzed by HPLC. Pyridinoline content in bone collagen was decreased by ovariectomy but supplementation with the PT extracts was similarly increased to Sham. These results suggest that the PT supplementation could decrease bone loss in postmenopausal women.

• Development and Reproduction
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• v.4 no.1
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• pp.109-114
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• 2000

The present study was undertaken to examine the effects of ethanol on the ovarian steroidogenic acute regulatory protein(StAR) gene expression during prepubertal and onset of puberty. From day 25, each rat began receiving either a control saline or ethanol. Animals were sacrificed on day 27 and 32, and their ovaries and blood were collected. In the present results, ethanol treatment significantly decreased serum luteinizing hormone contents at both time points. Uterine weights of ethanol-treated group were significantly lighter than control group at early time point while there was no noticeable discrepancy at late time point. Vaginal openings, a marker of onset of puberty, also clearly delayed in ethanol-treated group. Using an in situ hybridization histochemistry, we determined the expression of mRNAs encoding StAR. Ovaries from ethanol-treated rats showed a suppresed expression of StAR mRNA. These results demonstrate that ethanol can disturb the prepubertal ovarian function and onset of puberty, at least in part, through the inhibition of ovarian StAR gene expression.

• Korean journal of applied entomology
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• v.34 no.2
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• pp.140-146
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• 1995

Changes in protein content during oocyte development was measured and egg-specific protein was characterized from the eggs in Lucilia illustris. During normal development ovarian protein was rapidly increased at 72hr and reached maximum at 96hr after a protein meal, when the eggs were fully matured. Purified protein from the ovaries by gel filtration of DEAE-cellulose an Sephacryl S-200 was loaded on 7.5% native polyacrylamide gel electrophoresis and identified at ${R}_{f}$ 0.4 as egg-specific protein, which has a mol. wt of 110,000. A total of 13 amino acids in th egg-specific protein was identified and expecially asparagine, glutamic acid, and tyrosine were highly concentrated. Five fatty acids were also identified. It is suggested that there is a specific protein in the eggs of L. illustris except yolk protein synthesized and secreted by fat body.

• Journal of Embryo Transfer
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• v.18 no.2
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• pp.85-90
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• 2003

This study examined the viability of canine oocytes following storage at 4 or 38$^{\circ}C$ for 5 h. Cumulus intact oocytes were collected from domestic dog following ovariohysterectomy at local veterinary clinics. In Exp I, the oocytes that collected from ovary transport different temperatures (4 or 38$^{\circ}C$) for 5 h, were cultured for (24 or 48 h). Survivability of oocytes judged by morphological appearance and PI (propidium iodide) staining. The survival rates at 4$^{\circ}C$ ovary transport group showed significantly lower than control group (0%; 0/129 vs. 72.9%; 129/177) 48 h after culture (P<0.05). In Exp II, to assess nuclear maturation of control group oocytes (ovary transported at 38$^{\circ}C$) after in vitro cultured for 24, 48 or 96 h. After 24 h and 48 h of culture, the metaphase I to metaphase II stages (MI to MII) was 8.3% (6/72) and 8.9% (9/101), and which was not increased at 96h (9.5%; 8/84). These results show that canine oocytes remarkably sensitive to low temperature and the percentage of oocytes reaching MI to MII did not increase 96 h after culture.

• Clinical and Experimental Reproductive Medicine
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• v.35 no.2
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• pp.163-167
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• 2008

Ovarian hyperstimuation syndrome (OHSS) is the most serious complication of controlled ovarian stimulation. It causes symptoms such as, ovarian enlargement, ascites, pleural effusion, pericardial effusion, hemoconcentration, electrolyte imbalance, and thromboembolism. Although proper management is done, thromboembolism could occur and is difficult to predict. Moreover it can cause death. Consequently thromboembolism is the most dangerous complication of OHSS. We experienced a OHSS patient with thromboembolism of the brain after having IVF-ET.