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- 저자 : Qiuyang Li (검색결과 4 건)
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Effects of Tween 80 on the liquid fermentation of Lentinus edodes
Qiuyang Li,Yuguo Lei,Guoyuan Hu,Yuanzheng Lei,Dongmei Dan 한국식품과학회 2018 Food Science and Biotechnology Vol.27 No.4
This paper explored the effects of Tween 80 on the biomass, intracellular polysaccharide (IPS) content, fermentation parameters, the pellets size of mycelium, and the antioxidant activity of IPS in Lentinus edodes liquid fermentation. With adding to Tween 80, the outputs of biomass and IPS increased during the L. edodes fermentation, respectively, while the reducing sugar content was decreased, as well as, the time courses of pH value were different. It was also shown that the addition of Tween 80 could protect the intact of pellets from breaking down. The effects of Tween 80 on the main structure of IPS were no obvious, and the IPS were revealed similar infrared spectrum, as was indicated by the infrared spectrum analysis. Improvements in the scavenging capacity of DPPH radicals of IPS were observed in Tween 80 treated group compared with the control group. Tween 80 exerts impacts on the liquid fermentation of L. edodes.
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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 고려인삼학회 2023 Journal of Ginseng Research Vol.47 No.5
Background: Changes to work-life balance has increased the incidence of cervical cancer among youngerpeople. A minor ginseng saponin known as ginsenoside Rk1 can inhibit the growth and survival ofhuman 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-dependentmanner and inhibited cell division and proliferation. Ginsenoside Rk1 markedly also activated theapoptotic signaling pathway via caspase 3, PARP, and caspase 6. In addition, ginsenoside Rk1 increasedLC3B protein expression, indicating the promotion of the autophagy signaling pathway. Protein processingin the endoplasmic reticulum signaling pathway was downregulated in Gene Ontology (GO) andKyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses, consistent with tealtimequantitative PCR and western blotting that showed YOD1, HSPA4L, DNAJC3, and HSP90AA1expression levels were dramatically decreased in HeLa cells treated with ginsenoside Rk1, with YOD1was the most significantly inhibited by ginsenoside Rk1 treatment. Conclusion: These findings indicate that the toxicity of ginsenoside Rk1 in HeLa cells can be explained bythe inhibition of protein synthesis in the endoplasmic reticulum and enhanced apoptosis, with YOD1acting as a potential target for cervical cancer treatment.
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Qingli Li,Lunxu Liu,Qiuyang Zhang,Sen Liu,Dongxia Ge,Zongbing You 대한암학회 2014 Cancer Research and Treatment Vol.46 No.3
PurposeInterleukin-17 (IL-17) is a proinflammatory cytokine that plays important roles ininflammation, autoimmunity, and cancer. The purpose of this study was to determineif IL-17 indirectly regulates macrophage differentiation through up-regulation ofcyclooxygenase-2 (COX-2) expression in the cancer cell lines. Materials and MethodsHuman cervical cancer HeLa, human lung cancer A549, and mouse prostate cancerMyc-CaP/CR cell lines were treated with recombinant IL-17; Western blot analysis,enzyme-linked immunosorbent assay, and quantitative real-time polymerase chainreaction analysis were utilized to examine the cellular responses. ResultsIL-17 up-regulated expression of COX-2 mRNA and protein in HeLa, A549, and Myc-CaP/CR cell lines. IL-17’s effects were mediated through nuclear factor-κB andERK1/2 signaling pathways as the inhibitors of these pathways could inhibit IL-17-induced COX-2 expression. The conditional medium obtained from the cancer cellscontained prostaglandin E2, the levels of which were increased by IL-17 treatment. When treated with the conditional medium, particularly with the IL-17-induced conditionalmedium, mouse RAW264.7 macrophages and human THP-1 monocytes expressedhigher levels of IL-10 (a marker of M2 macrophages) than inducible nitricoxide synthase or tumor necrosis factor α (markers of M1 macrophages). In contrast,when RAW264.7 and THP-1 cells were treated directly with IL-17, expression of thesemarker genes was not markedly changed. ConclusionThe results of this study suggest that IL-17 indirectly promotes M2 macrophagedifferentiation through stimulation of the COX-2/PGE2 pathway in the cancer cells,thus IL-17 plays an indirect role in regulating the tumor immune microenvironment.
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A Robust Optimization Method Utilizing the Variance Decomposition Method for Electromagnetic Devices
Shujuan Wang,Qiuyang Li,Jinbao Chen 한국자기학회 2014 Journal of Magnetics Vol.19 No.4
Uncertainties in loads, materials and manufacturing quality must be considered during electromagnetic devices design. This paper presents an effective methodology for robust optimization design based on the variance decomposition in order to keep higher accuracy of the robustness prediction. Sobol’ theory is employed to estimate the response variance under some specific tolerance in design variables. Then, an optimal design is obtained by adding a criterion of response variance upon typical optimization problems as a constraint of the optimization. The main contribution of this paper is that the proposed method applies the variance decomposition to obtain a more accurate variance of the response, as well save the computational cost. The performance and robustness of the proposed algorithms are investigated through a numerical experiment with both an analytic function and the TEAM 22 problem.
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