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검색결과 110,287건 처리시간 0.111초

New polyacetylenes from Gymnaster Koraiensis

  • Park, J.Y.;Jung, H.J.;Ren-Bo An;;Kim, Y.K.;Na, M.K.;Chu, B.Y.;Kim, Y.H;Bae, K.H.
    • 대한약학회:학술대회논문집
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    • 대한약학회 2000년도 NEW STRATEGY FOR DRUG DEVELOPMENT IN POST-GENOMIC ERA(대한약학회)
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    • pp.229.1-229.1
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    • 2000

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In Vivo Protein Transduction: Delivery of PEP-1-SOD1 Fusion Protein into Myocardium Efficiently Protects against Ischemic Insult

  • Zhang, You-en;Wang, Jia-ning;Tang, Jun-ming;Guo, Ling-yun;Yang, Jian-ye;Huang, Yong-zhang;Tan, Yan;Fu, Shou-zhi;Kong, Xia;Zheng, Fei
    • Molecules and Cells
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    • 제27권2호
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    • pp.159-166
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    • 2009

  • Myocardial ischemia-reperfusion injury is a medical problem occurring as damage to the myocardium following blood flow restoration after a critical period of coronary occlusion. Oxygen free radicals (OFR) are implicated in reperfusion injury after myocardial ischemia. The antioxidant enzyme, Cu, Zn-superoxide dismutase (Cu, Zn-SOD, also called SOD1) is one of the major means by which cells counteract the deleterious effects of OFR after ischemia. Recently, we reported that a PEP-1-SOD1 fusion protein was efficiently delivered into cultured cells and isolated rat hearts with ischemia-reperfusion injury. In the present study, we investigated the protective effects of the PEP-1-SOD1 fusion protein after ischemic insult. Immunofluorescecnce analysis revealed that the expressed and purified PEP-1-SOD1 fusion protein injected into rat tail veins was efficiently transduced into the myocardium with its native protein structure intact. When injected into Sprague-Dawley rat tail veins, the PEP-1-SOD1 fusion protein significantly attenuated myocardial ischemia-reperfusion damage; characterized by improving cardiac function of the left ventricle, decreasing infarct size, reducing the level of malondialdehyde (MDA), decreasing the release of creatine kinase (CK) and lactate dehydrogenase (LDH), and relieving cardiomyocyte apoptosis. These results suggest that the biologically active intact forms of PEP-1-SOD1 fusion protein will provide an efficient strategy for therapeutic delivery in various diseases related to SOD1 or to OFR.

  • https://doi.org/10.1007/s10059-009-0020-4 인용 KSCI

Ginsenoside Rk1 inhibits HeLa cell proliferation through an endoplasmic reticulum signaling pathway

  • Qiuyang Li;Hang Sun;Shiwei Liu;Jinxin Tang;Shengnan Liu;Pei Yin;Qianwen Mi;Jingsheng Liu;Lei yu;Yunfeng Bi
    • Journal of Ginseng Research
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    • 제47권5호
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    • pp.645-653
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    • 2023

  • Background: Changes to work-life balance has increased the incidence of cervical cancer among younger people. A minor ginseng saponin known as ginsenoside Rk1 can inhibit the growth and survival of human cancer cells; however, whether ginsenoside Rk1 inhibits HeLa cell proliferation is unknown. Methods and results: Ginsenoside Rk1 blocked HeLa cells in the G0/G1 phase in a dose-dependent manner and inhibited cell division and proliferation. Ginsenoside Rk1 markedly also activated the apoptotic signaling pathway via caspase 3, PARP, and caspase 6. In addition, ginsenoside Rk1 increased LC3B protein expression, indicating the promotion of the autophagy signaling pathway. Protein processing in the endoplasmic reticulum signaling pathway was downregulated in Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses, consistent with teal-time quantitative PCR and western blotting that showed YOD1, HSPA4L, DNAJC3, and HSP90AA1 expression levels were dramatically decreased in HeLa cells treated with ginsenoside Rk1, with YOD1 was the most significantly inhibited by ginsenoside Rk1 treatment. Conclusion: These findings indicate that the toxicity of ginsenoside Rk1 in HeLa cells can be explained by the inhibition of protein synthesis in the endoplasmic reticulum and enhanced apoptosis, with YOD1 acting as a potential target for cervical cancer treatment.

  • https://doi.org/10.1016/j.jgr.2023.04.004 인용 PDF

D-1,3-디옥솔란 및 L-1,3-옥사티올란 5-페닐세레닐 피리미딘 뉴크레오사이드의 합성 (Synthesis of D-1,3-Dioxolane and L-1,3-Oxathiolane 5-Phenylselenyl Pyrimidine Nucleosides as Potential Antiviral Agents)

  • 유정만;문현주;정병호;최보길;홍준희;천문우
    • 약학회지
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    • 제40권1호
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    • pp.46-51
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    • 1996

  • Eight new D-1.3-dioxolanyl and L-1,3-oxathiolanyl nucleosides containing 5-phenyl- selenyl pyrimidine bases which are expected to have antiviral activity were synthesized. Condensation of D-1,3-dioxolane acetate and L-1,3-oxathiolane acetate with 5-phenylselenyl pyrimidines gave anomeric mixtures of their nucleosides which were separated by silicagel column chromatography.

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