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Lee, Hyojung,Lee, Eui-joon,Kim, Hyunseong,Lee, Gihyun,Um, Eun-Jin,Kim, Youngchul,Lee, Boo-Yong,Bae, Hyunsu S. Karger AG 2011 American journal of nephrology Vol.34 No.2
<P>Abstract</P><P><I>Background/Aims:</I> Bee venom (BV) therapy has been used to treat inflammatory diseases including rheumatoid arthritis in humans and in experimental animals. This study was conducted to examine the therapeutic effect of BV on established lupus nephritis in New Zealand Black/White (NZB/W) F1 female mice. <I>Methods:</I> Beginning at 18 weeks of age, mice were given a subcutaneous injection of either BV (3 mg/kg BW) or an equal volume of saline once a week until the end of the study. To examine the effect of BV on CD4+CD25+Foxp3+ regulatory T cells, splenocytes from NZB/W mice (23 weeks of age) were treated with BV (1 μg/ml) or PBS in the presence of anti-CD3ε (1 μg/ml) and anti-CD28 antibodies (4 μg/ml) for 48 h. <I>Results:</I> BV administration delayed the development of proteinuria to a significant extent, prevented renal inflammation, reduced tubular damage, and reduced immune deposits in the glomeruli. Interestingly, CD4+CD25+ regulatory T cells were significantly increased in vitro and in vivo after BV treatment. <I>Conclusion:</I> Collectively, the administration of BV that has immune modulating effects represents an applicable treatment of lupus nephritis in NZB/W F1 mice.</P><P>Copyright © 2011 S. Karger AG, Basel</P>
Cisplatin induced nephrotoxicity is inhibited by Taxilli Ramulus
Lee, Gihyun,Lee, Jun-Ho,Ham, Kyoung Keun,Lee, Hyojung,Kim, Hyunseong,Lee, Hyeonhoon,Hong, Moochang,Shin, Minkyu,Bae, Hyunsu 대한독성유전단백체학회 2012 Molecular & cellular toxicology Vol.10 No.2
Taxilli Ramulus has been shown have antioxidant and anti-inflammatory activities. Cisplatin is the most active cytotoxic anti-cancer drugs. However, the nephrotoxicity of cisplatin limits its use as a therapeutic. In the present study, we examined whether Taxilli Ramulus could protect against cisplatin induced acute renal failure in mice. Taxilli Ramulus were administrated orally once a day for 3 days (150 or 300 mg/kg body wt). After 3 days, all groups of mice received a single dose of cisplatin (25 mg/kg (body wt)) intraperitoneally. Taxilli Ramulus treatment ameliorated renal dysfunction 72 h after cisplatin injection. Taxilli Ramulus treated group had significantly reduced levels of proinflammatory cytokines when compared to the control group. These results show that Taxilli Ramulus is a potent herbal medicine that can reduce cisplatin nephrotoxicity. It also demonstrates that Taxilli Ramulus can prevent the renal toxic effects caused by cisplatin.
Assessments in biocides with omics approaches to ecosystem
Seohee Ma,Dahye Yoon,Hyunsu Kim,Hyangjin Lee,Seonghye Kim,Huichan Lee,Jieun Kim,Soojin Lee,Yunsuk Lee,Yujin Lee,김석만 한국자기공명학회 2018 Journal of the Korean Magnetic Resonance Society Vol.22 No.4
Benzisothiazolinone (BIT) is the preservative that is widely used in industrial and household products. In this study, zebrafish (Danio rerio) was exposed to BIT at different concentrations (control, 0.5 g/L, 1.0 g/L and 2.0 g/L) for 72 hours. The techniques of nuclear magnetic resonance (NMR) spectroscopy were applied to analyze the effects of BIT on zebrafish. The advantages of NMR are the minimal sample preparation and high reproducibility of experimental results. With the multivariate statistical analysis, dimethylamine, N-acetylaspartate, glycine and histidine were identified as an important metabolite in differentiating between the control and BIT-exposed group. This study will improve the understanding the metabolite changes in the zebrafish in response to BIT exposure.
Assessments in biocides with omics approaches to ecosystem
Ma, Seohee,Yoon, Dahye,Kim, Hyunsu,Lee, Hyangjin,Kim, Seonghye,Lee, Huichan,Kim, Jieun,Lee, Soojin,Lee, Yunsuk,Lee, Yujin,Kim, Suhkmann Korean Magnetic Resonance Society 2018 Journal of the Korean Magnetic Resonance Society Vol.22 No.4
Benzisothiazolinone (BIT) is the preservative that is widely used in industrial and household products. In this study, zebrafish (Danio rerio) was exposed to BIT at different concentrations (control, 0.5 g/L, 1.0 g/L and 2.0 g/L) for 72 hours. The techniques of nuclear magnetic resonance (NMR) spectroscopy were applied to analyze the effects of BIT on zebrafish. The advantages of NMR are the minimal sample preparation and high reproducibility of experimental results. With the multivariate statistical analysis, dimethylamine, N-acetylaspartate, glycine and histidine were identified as an important metabolite in differentiating between the control and BIT-exposed group. This study will improve the understanding the metabolite changes in the zebrafish in response to BIT exposure.
Lee, Hyunsu,Lee, Jae-Ho,Kim, Dong-Choon,Hwang, IlSeon,Kang, Yu-Na,Gwon, Gi-Jeong,Choi, In-Jang,Kim, Shin Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.1
Alterations in mitochondrial DNA (mtDNA) have been studied in various cancers. However, the clinical value of mtDNA copy number (mtCN) alterations in gastric cancer (GC) is poorly understood. In the present study, we investigated whether alterations in mtCNs might be associated with clinicopathological parameters in GC cases. mtCN was measured in 109 patients with GC by quantitative real-time PCR. Then, correlations with clinicopathological characteristics were analyzed. mtCN was elevated in 64.2% of GC tissues compared with paired, adjacent, non-cancerous tissue. However, the observed alterations in mtCN were not associated with any clinicopathological characteristics, including age, gender, TN stage, Lauren classification, lymph node metastasis, and depth of invasion. Moreover, Kaplan-Meier survival curves revealed that mtCN was not significantly associated with the survival of GC patients. In this study, we demonstrated that mtCN was not a significant marker for predicting clinical characteristics or prognosis in GC.
( Hyunsu LEE ),( Seokju KIM ),( Mi-Jin PARK ) 한국목재공학회 2021 목재공학 Vol.49 No.4
본 연구에서는 리그닌 기반 다공성 탄소(lignin-based porous carbon; LBPC)를 수산화칼륨(KOH)으로 활성화할 때 온도가 비표면적과 전기화학적 특성에 미치는 영향을 알아보았다. 리그닌과 acrylonitrile을 그라프트 중합으로 합성한 리그닌-polyacrylonitrile (PAN) 공중합체를 전구체로 하여 LBPC를 제조한 후 LBPC를 KOH로 600, 700, 800, 900℃에서 활성화하여 활성화 처리한 LBPC (KA-LBPC-6, 7, 8, 9)를 제조하였다. KA-LBPC의 표면 특성을 알아보기 위해 주사전자현미경으로 관찰하였으며, 비표면적 분석을 통해 기공 특성을 파악하였다. 전기화학적 특성은 3전극 시스템으로 분석하였다. 실험 결과 SEM 사진상에서 활성화 처리에 의한 미세기공 형성을 관찰하였다. KA-LBPC-7의 비표면적은 2480.1 ㎡/g, 미세기공 부피는 0.64 ㎤/g, 중기공 부피는 0.76 ㎤/g으로 KA-LBPC 중에서 가장 좋은 기공 특성을 보였다. 전기화학적 특성 역시 2 mV/s의 주사속도에서 비정전용량이 151.3 F/g이었던 KA-LBPC-7이 가장 좋은 것으로 나타났다. In this study, we investigated the effect of temperature on specific surface area and electrochemical properties when lignin-based porous carbon (LBPC) with potassium hydroxide (KOH) is activated. After preparing LBPCs using lignin-polyacrylonitrile (PAN) copolymer, which was synthesized by graft polymerizing lignin and acrylonitrile as a precursor, activated LBPCs (KA-LBPC-6, 7, 8, 9) were manufactured by activating LBPC with KOH at 600℃, 700℃, 800℃ and 900℃. To identify the surface characteristics of KA-LBPC, observations were made with a scanning electron microscopy (SEM), and the pore characteristics were identified via specific surface area analysis. The electrochemical properties were analyzed using a three-electrode system. The experiment has shown that micropores formed by activation can be observed in SEM images. KA-LBPC-7 had the best pore characteristics among KA-LBPCs, with a specific surface area of 2480.1 ㎡/g, a micropore volume of 0.64 ㎤/g, and a mesopore volume of 0.76 ㎤/g. KA-LBPC-7 showed the best electrochemical properties with a specific capacitance of 151.3 F/g at the scan rate of 2 mV/s.
Ginsenoside Rg1 enhances CD4^(+) T-cell activities and modulates Th1/Th2 differentiation
Lee, Eui-joon,Ko, Eunjung,Lee, Jinwoo,Rho, Samwoong,Ko, Seonggyu,Shin, Min-Kyu,Min, Byung-il,Hong, Moo-Chang,Kim, Si-young,Bae, Hyunsu WHO COLLABORATING CENTRE FOR TRADITIONAL MEDICINE 2003 東西醫學硏究所 論文集 Vol.2003 No.-
Panax ginseng is commonly used as a tonic medicine in Asian countries such as Korea, China, and Japan. It has been reported that ginsenoside Rg1 in P. ginseng increases the proportion of T helper(Th) cells among the total number of T cells and promotes IL-2 gene expression in murine splenocytes. This implies that ginsenoside Rg1 increases the immune activity of CD4 T cells, however, the exact mechanism remains unknown. The present study elucidated the direct effect of Rg1 on helper T-cell activities and on Th1/Th2 lineage development. The results demonstrated that ginsenoside Rg1 had no mitogenic effects on unstimulated CD4^(+) T cells, but augmented CD4^(-) T-cell proliferation upon activation with anti-CD3/anti-CD28 autibodies in a dose-dependent manner. Rg1 also enhanced the expression of cell surface protein CD69 on CD4^(-) T cells. In Th0 condition, ginsenoside Rg1 increases the expression of IL-2 mRNA, and enhances the expression of IL-4 mRNA on CD4^(+) T cells, suggesting that Rg1 prefers to induce Th2 lineage development. In addition, ginsenoside Rg1 increases IL-4 secretion in CD4^(+) T cells under Th2 skewed condition, while decreasing IFN-ysecretion of cells in Th1 polarizing condition. Thus, Rg1 enhances Th2 lineage development from the naive CD4^(+) T cell both by increasing Th2 specific cytokine secretion and by repressing Th1 specific cytokine production. Therefore, these results suggest that ginsenoside Rg1 is a desirable agent for enhancing CD4^(-) T-cell activity, as well as the correction of Th1-dominant pathological disorders.