• BMB Reports
• /
• 제33권2호
• /
• pp.184-187
• /
• 2000

Prostaglandin $E_2$ ($PGE_2$) plays an important role in the regulation of various gastric functions, and the growth-inhibitory activities on tumor cells are studied in vitro and in vivo. Although the mechanisms have attracted many researchers in the past decade, the molecular mechanisms of cell cycle arrest, or induction of apoptosis by $PGE_2$, is unclear. We investigated the effects of $PGE_2$ on the growth of the human gastric carcinoma cell line SNU1 and genes that are regulated by $PGE_2$ and isolated them using differential display RT-PCR (DD RT-PCR). FACS analysis suggested that SNU1 cells were arrested at the G1 phase by $PGE_2$ treatment. This growth inhibitory effect was in a time- and dose-dependent manner. Treatment of SNU1 cells with $10\;{\mu}g/ml$ $PGE_2$, followed by DD RT-PCR analysis, revealed differently expressed bands patterns from the control. Among the differently expressed clones, we found an unidentified cDNA clone (HGP-27) overexpressed in $PGE_2$-treated cells. The full-length cDNA of HGP-27 was isolated using RACE, which consisted of a 30-nt 5'-noncoding region, a 891-nt ORF encoding the 296 amino acid protein, and a 738-nt 3'-noncoding region including a poly(a) signal. This gene was localized on the short arm of chromosome number 11. Using the Motif Finder program, a myb-DNA binding repeat signature was detected on the ORF region. The COOH-terminal half was shown to have similarity with the $NH_3$-terminal domain of thioredoxin (Trx). This relation between HGP-27 and Trx implied a potential role for HGP-27 in modulating the DNA binding function of a transcription factor, myb.

• 생명과학회지
• /
• 제20권6호
• /
• pp.845-852
• /
• 2010

프로스타글란딘 D2 (PGD2)와 E2 (PGE2)는 COX-2로부터 유래되는 주요 프로스타노이드로서, 슈도모나스에 의한 폐감염이 발생하였을 경우 폐에서 합성되어 슈도모나스 세균감염을 조절할 수 있음을 밝힌바 있음. 본 연구에서는 두 프로스타노이드의 생성 비율을 조절하는 기전을 연구하고자함. 마크로파아지에 의해 PGD2/PGE2 비율이 결정되는 지 조사하기 위해, 마우스의 허파로부터 마크로파아지를 분리하고 LPS로 처리할 경우, COX-2, PGD2합성 효소인 L-PGDS, PGE2의 합성효소인 mPGES-1 등의 발현이 두 프로스타노이드의 생성 비율에 미치는 영향을 조사하였음. 또한 이 효소들의 발현이 일차 허파 마크로파아지에 특이적인지의 여부를 조사하기 위해, 허파 마트로파이지 세포주인 MH-S와 비교 조사하였음. COX-2가 프로스타글린딘 비율에 미치는 영향을 조사하기 위해, COX-2 특이적 siRNA릉 이용하여 COX-2의 발현을 억제하고 L-PGDS, mPGES-1 등의 발현을 조사하였음. 결과에 따르면, 일차 허파 마트로파아지는 MH-S과는 달리 많은 양의 PGE2를 생성하나, 두 세포간 COX-2, L-PGDS, mPGES-1의 발현에는 큰 차이가 없었음. 이는 이들 효소 외에 다른 인자들이 두 프로스타노이드의 비율을 결정하는데 관여함을 제시함. LPS의 처리에 의해 폐염증을 발생시키고 허파에서의 PGD2/PGE2 비율을 조사한 결과, LPS에 의해 폐염증이 발생할 경우 LPS를 처리한 일차 허파 마크로파아지와 유사하게 PGE2의 발현이 PGD2에 비해 상당히 높았음. 결과적으로 본 연구의 결과는, 허파에서의 PGD2/PGE2 비율은, COX-2, L-PGDS, mPGES-1 등 PGD2나 PGE2의 합성에 직접적인 영향을 주는 효소에 의해 결정되지 않으며, 허파마크로파아지의 PGD2/PGE2 비율을 반영할 가능성을 제시함.

• Archives of Plastic Surgery
• /
• 제37권5호
• /
• pp.526-530
• /
• 2010

Purpose: With the recent recognition of the importance of soft-tissue fillers, fat grafting has been assumed an increasingly important role as both an adjunctive and a primary procedure in aesthetic and reconstructive surgery. The main problem in achieving long-term soft-tissue augmentation is partial absorption of the injected fat and hence the need for overcorrection and re-injection. The purpose of this study is to improve the viability of the injected fat by the use of Lipo-PGE1. Methods: Human adipose tissue, obtained by suctionassisted lipectomy, was re -injected into the subcutaneous layer in the scalp of ICR mice. Lipo-PGE1 ($0.5{\mu}g$/kg) was injected intravenously in experimental group for 7 days from the operation day and saline was injected in control group. There were 5 animals in each group. The animals were euthanized 4 weeks after the procedure. Graft weight and volume were measured and histologic evaluation was performed. Result: Histologic analysis demonstrated significantly less cyst formation and less inflammatory reaction in the group treated with Lipo-PGE1. No significant difference was found between the groups regarding graft volume or the other histologic parameters investigated. Significant differences were demonstrated in microvascular density count. Conclusion: Less cyst formation, less inflammation, more angiogenesis indicating improved quality of the injected fat can be obtained by the addition of Lipo-PGE1. Further studies of various dosages of Lipo-PGE1 and their long-term effect are required before these encouraging results could be applied clinically.

• 한국수정란이식학회지
• /
• 제22권1호
• /
• pp.27-32
• /
• 2007

본 연구는 소 체외 수정란의 팽창 및 hatching시 prostaglandin $F_2{\alpha}(PGF_2{\alpha})$와 prostaglandin $E_2(PGF_2)$의 영향에 대하여 검토하였다. 체외 수정란의 체외 배양시 다음과 같이 (1) 0, 1, 10 및 100ng/ml $PGF_2{\alpha}$, (2) 0, 1, 10 및 100ng/ml $PGE_2$, (3) low $PGF_2{\alpha}$(1ng/ml : 1ng/ml), (4) low $PGF_2{\alpha}\;:\;high\;PGE_2(1ng/ml\;:\;10ng/ml)$, (5) high $PGF_2{\alpha}\;:\;low\;PGE_2$ (10ng/ml : 1ng/ml), (6) high $PGF_2{\alpha}$ : high $PGE_2$(10ng/ml : 10ng/ml)로 나누어 처리하였다. 그 결과, $PGF_2{\alpha}$ 및 $PGE_2$의 단독 처리가 소 체외 수정란의 배반포로의 발달에는 영향을 미치지는 않았다. 그러나 10ng/ml $PGE_2$(10.3%) 그리고 1ng/ml $PGF_2{\alpha}$ : 10ng/ml $PGE_2$(22.2%)를 처리한 수정란의 hatching율에 있어서는 대조군(4.3% and 12.7%)이나 다른 처리구에 비하여 유의적으로 높은 결과를 나타냈다(P<0.05). 한편 높은 농도의 $PGF_2{\alpha}$를 처리한 수정란의 경우 hatching율이 감소하였다. 따라서 본 연구의 결과는 $PGF_2{\alpha}$ 및 $PGE_2$의 첨가가 소 수정란의 hatching율과 관련이 있으며, 이것은 농도에 따라 서로 다른 영향을 미칠 수 있을 것으로 추측되었다.

• IMMUNE NETWORK
• /
• 제3권3호
• /
• pp.201-210
• /
• 2003

Objective: The role of prostaglandin $E_2$ (PGE2) in the etiopathogenesis of immune and inflammatory diseases has become the subject of recent debate. To determine the role of PGE2 in rheumatoid arthritis (RA), we tested the effect of exogenous PGE2 on the production of cyclooxygenase-2 (COX-2) by rheumatoid synoviocytes. Methods: Fibroblast-like synoviocytes (FLS) were prepared from the synovial tissues of RA patients, and cultured in the presence of PGE2. The COX-2 mRNA and protein expression levels were determined by RT-PCR and Western blot analysis, respectively. The PGE2 receptor subtypes in the FLS were analyzed by RT-PCR. Electrophoretic mobility shift assay (EMSA) was used to measure the NF-${\kappa}B$ binding activity for COX-2 transcription. The in vivoeffect of PGE2 on the development of arthritis was also tested in collagen induced arthritis (CIA) animals. Results: PGE2 ($10^{-11}$ to $10^{-5}M$) dose-dependently inhibited the expression of COX-2 mRNA and the COX-2 protein stimulated with IL-$1{\beta}$, but not COX-1 mRNA. NS-398, a selective COX-2 inhibitor, displayed an additive effect on PGE2-induced COX-2 downregulation. The FLS predominantly expressed the PGE2 receptor (EP) 2 and EP4, which mediated the COX-2 suppression by PGE2. Treatment with anti-IL-10 monoclonal antibodies partially reversed the PGE2-induced suppression of COX-2 mRNA, suggesting that IL-10 may be involved in modulating COX-2 by PGE2. Experiments using an inducer and an inhibitor of cyclic AMP (cAMP) suggest that cAMP is the major intracellular signal that mediates the regulatory effect of PGE2 on COX-2 expression. EMSA revealed that PGE2 inhibited the binding of NF-${\kappa}B$ in the COX-2 promoter via a cAMP dependent pathway. In addition, a subcutaneous injection of PGE2 twice daily for 2 weeks significantly reduced the incidence and severity of CIA as well as the production of IgG antibodies to type II collagen. Conclusion: Our data suggest that overproduced PGE2 in the RA joints may function as an autocrine regulator of its own synthesis by inhibiting COX-2 production and may, in part, play an anti-inflammatory role in the arthritic joints.

• 한국발생생물학회지:발생과생식
• /
• 제12권3호
• /
• pp.267-274
• /
• 2008

포배의 분화는 배아의 착상에 있어 핵심적인 단계로 배아 자체 또는 생식수관에서 유래하는 조절요인의 조절을 받는다. 이들 조절요인과 포배와의 순차적인 신호의 주고 받음은 분화의 중요한 단계로 인식되고 있다. 한편, 포배기 때 자유 칼슘을 통한 신호전달경로가 포배의 분화에 중요한 축의 하나로 제안되어 왔다. Concanavalin A(Con A)가 포배의 자유 칼슘 농도 증감을 유도한다는 것을 밝혀졌으나, 포배 내 자유 칼슘 농도를 변형시켜 부화와 그 이후의 발생을 촉진하는 것으로 알려진 heparin-binding epidermal growth factor-like growth factor(HB-EGF)와는 달리 팽창 이후의 부화를 억제하였다. 따라서 본 연구에서는 착상과정에서 중요한 역할을 하는 것으로 알려진 prostaglandin $E_2(PGE_2)$가 포배의 분화에 관여하는지를 Con A와 연계하여 알아보았다. Con A는 그 처리 시간에 관계없이 1시간 처리군 그리고 계속처리군에서 팽창은 촉진하고 부화는 유의하게 억제하였다. 특히 계속처리군에서 부화율이 1시간 처리군에 비하여 유의하게 감소하였다. 또한, $PGE_2$도 포배 내 자율 칼슘 농도를 증가시켰으나 팽창과 부화를 촉진하지 않았다. 또한, $10{\mu}m\;PGE_2$ 농도에서는 부화가 억제되는 경향을 보였다. 그러나 흥미롭게도 $PGE_2$는 Con A가 처리된 포배의 부화를 촉진하였다. Con A를 전처리한 포배에 $PGE_2$를 처리할 경우 포배 내 자유 칼슘의 농도 증감이 진행됨을 공촛점현미경을 이용하여 분석할 수 있었다. 이러한 결과는 신호물질에 의해 유도된 자유 칼슘 농도의 증감이 신호물질에 따른 각기 다른 칼슘 매개로 활성화되는 신호경로를 조절하는 것을 추정할 수 있다. 또한, 순차적 신호물질 조절에 의한 자유 칼슘의 농도 증감이 포배의 분화에 있어 중요함을 제안한다.

• The Korean Journal of Physiology
• /
• 제14권2호
• /
• pp.1-5
• /
• 1980

This study was undertaken to investigate the influence of prostaglandin $E_1(PGE_1)$ upon the activity of carbonic anhydrase and upon the inhibitory action of acetazolamide on carbonic anhydrase. The heparinized blood was sampled by cardiac puncture from Sprague-Dawley strain rats under ether anesthesia and was hemolysed by adding distilled water 1,000 times the amount of the blood. The activity of carbonic anhydrase of 0.1 ml of the hemolysate was measured by Maren's simplified micro-method. In the first experiment, the 7 rats were used, and the activity was measured by adding 0.1 ml of various concentrations of $PGE_1$(0.5, 1.25, 2.5, 5.0, 10 and $20\;{\mu}g/ml$). In the second experiment, the 6 rats were used and the activity was measured by adding 0.1 ml of $PGE_1(5\;{\mu}g/ml)$ and 0.1 ml of acetazolamide$(6{\times}10^{-7}M/l)$ respectively or simultaneously. Obtained results were as follows: 1) The activity of carbonic anhydrase was significantly inhibited by $PGE_1$ at doses of $0.5{\sim}10\;{\mu}g/ml$, maximally at a dose of $2.5\;{\mu}g/ml$, but inhibition was no more observed at a dose of $20\;{\mu}g/ml$. 2) The activity of the acetazolamide group was significantly less than that of the control group. 3) The activity of the $PGE_1+acetazolamide$ group was significantly less than those of the $PGE_1$ group and the acetazolamide group. It is inferred from the above results that the $PGE_1$ inhibits the activity of carbonic anhydrase dose-dependently and strengthens the inhibitory effect of acetazolamide on carbonic anhydrase.

• Archives of Reconstructive Microsurgery
• /
• 제9권2호
• /
• pp.179-185
• /
• 2000

In the field of microsurgery, the vascular obstruction of the microvascular anastomosis by thrombus is one of the most important complication. The purpose of this study is to compare the effect between aspirin and prostaglandin $E_1$($PGE_1$) which act as the peripheral vasodilatation and platelet disaggregation. We have used total 48 white male rats and divided them into three gruoups(A, B and C group). Each group consists of 16 rats respectively. A group is as control, B group is medicated with aspirin(3.0mg/kg/day) and C group with $PGE_1(1.2{\mu}g/kg/day)$. The gross and histopathologic findings at anastomosed site were observed on 3, 5, 10 and 15 days after vascular anastomosis and the results were obtained as the followings. 1. The microvascular patency rate is 81.2% in control group, 93.8% in aspirin group and 100% in $PGE_1$ group. 2. On the histologic examination, the formation of mural thrombus is decreased both in the aspirin and $PGE_1$ group as comparing with the control group and also the hypertrophy of the intima forming from media is less formed in $PGE_1$ group than aspirin group and the degree of thickeness is also less. 3. The fibrosis of media is less observed in $PGE_1$ group than aspirin group. According to the above results, the application of $PGE_1$ to the microsurgery is considered to be effective on the prevention of the thrombus formation and on providing high patency rate.

• 대한화장품학회지
• /
• 제50권1호
• /
• pp.29-36
• /
• 2024

본 연구는 RAW 264.7 세포를 이용하여 넓패추출물(Ishige foliacea, I. foliacea)의 피부 항염 효과를 확인하고자 하였다. RAW 264.7 세포에 대한 넓패추출물의 항염증 효과는 세포 생존력 분석, mRNA 발현 및 산화질소(NO)/프로스타글란딘 E₂ (PGE₂) 생성을 통해 확인하였다. 넓패추출물의 항염증 효과는 IL-1α/IL-1β/IL-6/TNFα mRNA 발현 및 NO/PGE₂ 생성을 분석하여 규명하였고, 정량적 실시간 중합효소 연쇄반응을 통해 넓패추출물은 iNOS/COX2/IL-1α/IL-1β 및 IL-6의 mRNA 발현을 감소시키는 것을 확인하였다. 또한 PGE₂와 NO 생성의 비교를 통해 넓패추출물이 항염증 효과가 있음을 확인하였다. 넓패추출물의 항염 효과를 바탕으로 코스메슈티컬 소재로 활용될 수 있는 가능성을 확인하였다. 넓패추출물의 항염증 메커니즘에 대한 후속 연구를 바탕으로 코스메슈티컬뿐만 아니라 염증과 관련된 약리학적인 메커니즘 발굴에도 도움이 될 것으로 보인다.

• 한국재료학회지
• /
• 제6권3호
• /
• pp.291-296
• /
• 1996

Diglycidy1 ether of bisphenol A (DGEBA)/4, 4' -methylene dianiline(MDA)에 hydroquinonepheny1 glycidy1 ether(HQ-PGE)를 첨가한 계의 경화반응 메카니즘 FT-IR을 이용하여 연구하였다. 15$0^{\circ}C$에서 경화반응이 일어날 경우 반응기간이 증가할 때 에폭시기와 히드록시기는 감소하였고, 에테르기는 증가하였다. 그리고, HQ-PGE의 함량이 증가함에 따라 에폭시기의 소모량이 증가하였고, 유리 전이 온도가 감소하였다. 이로부터 HQ-PGE는 반응에 참여할 때 사슬 확장제와 반응 가속제로 작용함을 할 수 있었다.