• 동의생리병리학회지
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• 제23권5호
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• pp.1132-1138
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• 2009

Vascular inflammation is an important event in the development of vascular diseases such as tumor progression and atherosclerosis. This study was to investigate the inhibitory effects of WK-38, a new herbal prescription for the treatment of atherosclerosis, on vascular inflammation in human umbilical vein endothelial cells (HUVEC). WK-38 is composed of Rhei Rhizoma, Magonoliae Cortex, Moutan Cortez Radicis. Pretreatment with WK-38 was significantly blocked TNF-$\alpha$-induced expression level of cell adhesion molecules such as vascular cell adhesion molecule-1 (VCAM-1), intracellular adhesion molecule-1 (ICAM-1), and endothelial cell selectin (E-selectin) in a dose-dependent manner. TNF-$\alpha$-induced cell adhesion in co-cultured U937 and HUVEC was also blocked by pretreatment with WK-38. Moreover, WK-38 significantly suppressed p65 NF-${\kappa}B$ translocation into the nucleus by TNF-$\alpha$ as well as the phosphorylation and degradation of $I{\kappa}B-{\alpha}$. In conclusion, the present data suggested that WK-38 could suppress TNF-$\alpha$-induced vascular inflammatory process, though inhibition of NF-${\kappa}B$ activation in HUVEC.

• 동의생리병리학회지
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• 제17권2호
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• pp.549-552
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• 2003

To investigate the protective effect of Sophorae Radix (SR) on the damage by pulmonary vascular endothelial cells by xanthine oxidase (XO)/hypoxanthine (HX)-induced oxygen tree radical, Neutral Red (NR) and c-fos immunopositive cell assay were used. The results were obtained as follows ; The viability of vascular endothelial cells treated with XO/HX was decreased. And c-fos immunopositive cells represented a maximal increase in group treated with XO/HX for 2 hour in pulmonary vasvular endothelial cells. But pretreated groups with SR extracts were not inhibited the increase of c-fos immunopositive cells by XO/HX in a dose-dependent manner. These results show that XO/HX elicits toxic effects in cultured pulmonary vascular endothelial cells, and suggest that SR extract is very effective in the prevention of XO/HX-induced increase of c-fos immunopositive cells.

• Toxicological Research
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• 제11권2호
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• pp.175-180
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• 1995

We found that bufalln, one of the prominent components of the bufadlenolides in the Chinese medicine chan'su, has the potent inhibitory effects on growth and proliferation of the cultured bovine aortlc endothelial (BAE) and human umbilical vein endothelial (HUVE) cells. All naturally-occuring bufadienolides used in this study inhibited the cell growth in a dose-dependent manner. Particularly, bufalin among the bufadienolides showed the strongest inhibitory activity for the cell growth. The order of growth inhibition by bufadienolides on BAE cells was as follows: bufalin > gamabufotalln > bufotalln > cinobufagin > cinobufotalin > resibufogenin. The $IC_50$ values (50% inhibition of cell growth) of bufalin as determined by XTT assay were the range of 1-10 nM in BAE and HUVE cells. Bufalin exhibited a higher sensitivity towards cultured bovine aortic endothelial cells than human umbilical vein endothelial cells.

• 대한의용생체공학회:의공학회지
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• 제11권1호
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• pp.131-140
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• 1990

To improve antithrombogenicity of polymer that used in vascular graft and artificial organs, seeding of human endothelial cells on the polyurethane was studied. Human endothelial cells were ismlated from human umbilical veins, using type I collagenase, and identified with goat anti vWF antibodies. Human endothilial cell seeding was tried upon the polyurethane which has good mechanical property and resists stresses. The hydrophobic polyurethane surface was changed hydrophilic by corona discharf:e treatment. Surface hydrophilicity was measured with Wilhemly plate method and the goniometer. To evaluate matrix protein adsorption, fibronectin adsorption test was done. To eveluate cell adhesion, human endothelial cell attachment forces were measured rising a perfusion chamber of , ism diamter. Less cells were detached from the hydrophilically treated polyurethane. This showed that corona discharge on the polyurethane could improve matrix adsorption and endothelial cell attachment.

• Clinical and Experimental Reproductive Medicine
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• 제31권4호
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• pp.235-244
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• 2004

Objective: The effects on spermatogenesis by expression of vascular endothelial growth factor (VEGF) and endothelin-1 (ET-1) were investigated. Materials and Methods: Testicular specimens were obtained from 40 infertile males due to primary testicular failure and from 10 fertile males with other urologic problems. The specimens of infertile males were devided into 4 groups according to histologic findings; Sertoli cell only syndrome (A), maturation arrest (B), hypospermatogenesis (C) and sloughing and disorganization (D). VEGF and ET-1 expression were detected with immunohistochemical stain. Results: VEGF expression on Leydig cell was detected in all cases. But, VEGF expression rates on germ cell were significantly higher in infertile group B, C, D compared to that of the control group (p<0.05). ET-1 expression rates on Leydig cell was significantly lower in all infertile group compared to that of the control group (p<0.05). But, ET-1 expression rates on Sertoli cell was significantly higher in all infertile group compared to that of the control group (p>0.05). In germ cell of infertile group, LH, FSH and prolactin were significantly decreased, and estradiol is increased in positive stain group on ET-1 immunohistochemical stain (p<0.05). VEGF and ET-1 expression were not correlated mean seminiferous tubule diameter (p>0.05). Conclusions: Abnormal spermatogenesis would be reflected in VEGF expression in germ cell.

• 동의생리병리학회지
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• 제25권3호
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• pp.445-450
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• 2011

In order to validate the use of Olibanum as an anti-inflammatory drug in the traditional Korean medicine, I have investigated the effect of water-soluble extract of Olibanum (EO) on the expression of pro-inflammatory vascular cell adhesion molecule-1 (VCAM-1) in human umbilical vein endothelial cells (HUVECs) stimulated with tumor necrosis factor-${\alpha}$. The extract inhibited dose-dependently VCAM-1 expression without its cytotoxic effect on HUVECs, as measured by a flow cytometer using fluorescence-enhanced anti-VCAM-1 antibody, and significantly decreased mRNA levels of VCAM-1, as determined using reverse transcription polymerase chain reaction. These results suggest that Olibanum may have therapeutic potential in the control of endothelial disorders caused by inflammation.

• 대한방사선치료학회지
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• 제14권1호
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• pp.165-174
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• 2002

혈관내피세포 성장 인자(Vascular endothelial growth factor, VEGF)는 혈관내피세포 특이하게 성장요인으로 작용하는 물질로 알려져 있다. 전리방사선에 대한 혈관내피세포의 효과는 정상조직에 대한 반응에 있어 아주 중요한 요소일 것으로 생각된다. 본 연구는 방사선 조사에 의해 배양시킨 혈관내피세포에서 apoptosis가 유도되는지, 유도가 된다면 VEGF에 의해 apoptosis가 억제되는지 그리고 apoptosis의 억제가 어떤 경로를 경유하는지를 실험하였다. 혈관내피세포에 방사선를 조사한 결과, 대조군에 비하여 선량이 증가함에 따라 apoptosis가 증가하였다. 같은 조건하에서 VEGF는 농도 의존적으로 apoptosis를 억제하였다. Antiapoptotic factor로서 VEGF가 어떤 신호 과정을 경유하는지를 밝히고자, 혈관내피세포에 방사선을 조사하여 apoptosis를 유도하면서 Flt-1과 Flk-1/KDR receptor를 처리하였다. 그결과 VEGF에 유도된 apoptosis 억제효과가 차단되었다. Phosphatidylinositol 3'-kinase(PI3-kinase) 특정 억제 물질인 Wortmanin과 LY294002를 방사선 조사한 혈관내피에 VEGF와 함께 처리했을 때 VEGF에 의해 유도된 apoptosis를 억제하였다. 이같은 결과는 VEGF가 방사선 조사로 일어나는 세포 치사를 억제하는 중요한 역할을 담당하며, In Vivo의 실험이 더 이루어져야 할 것으로 생각된다.

• The Korean Journal of Physiology and Pharmacology
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• 제19권4호
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• pp.327-334
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• 2015

The cytoprotective enzyme heme oxygenase-1 (HO-1) influences endothelial cell survival, proliferation, inflammatory response, and angiogenesis in response to various angiogenic stimuli. In this study, we investigate the involvement of HO-1 in the angiogenic activity of orexin-A. We showed that orexin-A stimulates expression and activity of HO-1 in human umbilical vein endothelial cells (HUVECs). Furthermore, we showed that inhibition of HO-1 by tin (Sn) protoporphryin-IX (SnPP) reduced orexin- A-induced angiogenesis in vivo and ex vivo. Orexin-A-stimulated endothelial tube formation and chemotactic activity were also blocked in SnPP-treated vascular endothelial cells. Orexin-A treatment increased the expression of nuclear factor erythroid-derived 2 related factor 2 (Nrf2), and antioxidant response element (ARE) luciferase activity, leading to induction of HO-1. Collectively, these findings indicate that HO-1 plays a role as an important mediator of orexin-A-induced angiogenesis, and provide new possibilities for therapeutic approaches in pathophysiological conditions associated with angiogenesis.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제28권3호
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• pp.193-201
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• 2006

Squamous cell carcinoma(SCC) of head and neck(SCCHN) is the sixth most common human malignant tumor. However, despite advances in prevention and treatment of SCC, the five-year survival rates for patients remain still low. To improve the outcome for patients with SCCHN, novel treatment strategies are needed. Overexpression of the epidermal growth factor(EGF) and activation of its receptor(EGFR) are associated with progressive growth of SCCHN. Vascular endothelial growth factor(VEGF) signaling molecules are related with neoangiogenesis and vascular metastasis of SCC. In this study, we determined the therapeutic effect of AEE788(Novartis Pharma AG, Basel, Switzerland), which is a dual inhibitor of EGFR/ErbB2 and VEGFR tyrosine kinases, on human oral SCC. At first, we screened the expression of EGFR, c-ErbB2(HER-2) and VEGFR-2 in a series of human oral SCC cell lines. And then we evaluated the effects of AEE788 on the phosphorylation of EGFR and VEGFR-2 in a oral SCC cell line expressing EGFR/HER-2 and VEGFR-2. We also evaluated the effects of AEE788 alone, or with paclitaxel(Taxol) on the oral SCC cell growth and apoptosis. As a result, all oral SCC cells expressed EGFR and VEGFR-2. Treatment of oral SCC cells with AEE788 led to dose-dependent inhibition of EGFR and VEGFR-2 phosphorylation, growth inhibition, and induction of apoptosis. Moreover, AEE788 sensitizes the cells to paclitaxel-mediated toxicity and apoptosis. These data mean EGFR and VEGFR-2 can be reliable targets for molecular therapy of oral SCC, and therefore warrant clinical use of EGFR/VEGFR inhibition in the treatment of patients with recurrent or metastatic oral SCC.

• 생명과학회지
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• 제23권9호
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• pp.1177-1182
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• 2013

선모충(Trichinella spiralis)은 감염 후 nurse cell 형성과정에서 영양분 공급 및 배설을 위해 혈관신생인자인 vascular endothelial cell growth factor (VEGF)를 유도하여 혈관신생을 촉진한다. 하지만 이러한 과정 중 선모충이 어떻게 VEGF의 발현을 유도하는지에 대해서는 아직 밝혀지지 않았다. Nurse cell 형성 과정에서 저산소현상이 발생되고 이러한 저산소 현상이 VEGF의 발현을 유도할 것이라는 제안이 있지만 실제 nurse cell 형성 과정에 저산호 현상이 일어나는지도 조사되지 않았으며 저산소 현상이 실제 VEGF를 통한 혈관신생을 유도하는지도 규명되지 않았다. 최근 연구결과에 의하면 VEGF의 발현을 유도하는 티모신베타4 단백질이 초기의 선모충 감염 nurse cell에서 강력하게 유도되는 것이 관찰되었다. 게다가 저산소 현상이 nurse cell 형성 과정에서 관찰되지 않았고 면역세포들이 응집되어 있는 파괴되는 nurse cell에서만 관찰되는 것이 밝혀졌다. 이러한 결과는 티모신베타4가 저산소 현상과 무관하게 선모충 감염 nurse cell에서의 VEGF 유도 및 혈관신생을 유도할 가능성을 제시해 준다.