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Liqin Tang,Haocheng Liu,Manqin Fu,Yujuan Xu,Jing Wen,Jijun Wu,Yuanshan Yu,Xian Lin,Lu Li,Zhibin Bu,Wanyuan Yang 한국식품과학회 2022 Food Science and Biotechnology Vol.31 No.11
The preparation process of yellow pigment (YP) from gardenia (Gardenia jasminoides) fruit was investigated, and the main components of YP were characterized by liquid chromatography-time of flight-mass spectrometer/mass spectrometer (LC-TOF–MS/MS). Furthermore, cytotoxic activity in HepG2 cells by induction of apoptosis was also evaluated. The preparation results indicated that the color value of YP was 498.34, which was 8.6 times higher than crude YP. Fifteen compounds in YP were identified, and crocins were the predominant compounds. The cell experiment results showed that YP inhibited the proliferation of HepG2 cells in a time- and dose-dependent manner. Moreover, YP also inhibited HepG2 cells in G2/M stage, increased the level of intracellular reactive oxygen species (ROS), and enhanced cell apoptosis. Real-time quantitative polymerase chain reaction (RT-PCR) analysis revealed the up-regulation of caspase-3, 8, 9, and bax and down-regulation of bcl-2 in HepG2 cells. Overall, these findings suggested that YP had potential cytotoxic activity in HepG2 cells by induction of apoptosis, which might be beneficial to human health.
Yu Dong,Liqin Liu,Yingying Zhang,Junfeng Guan 한국원예학회 2014 Horticulture, Environment, and Biotechnology Vol.55 No.5
‘Jingbaili’ pear (Pyrus ussuriensis Maxim.) fruit shows rapid softening, yellowing and short shelf-life atambient temperature storage. In this study, ‘Jingbaili’ pear fruits were treated with 1.0 μL·L-1 1-methylcyclopropene(1-MCP) for 24 hours at 25 ± 2°C and then stored at 0°C. After 60 and 120 days of cold storage at 0°C, pearfruits were removed and stored at 20 ± 2°C to assess their shelf-life. The results indicated that the 1-MCP treatmentdelayed the decrease in firmness and chlorophyll (a, b, and a+b) content of peel, reduced the rates of respiration andethylene production, and inhibited the accumulation of hydrogen peroxide (H2O2), which was observed in the untreatedfruits during and after cold storage. Less difference was found in soluble solids content (SSC) between the controland 1-MCP-treated fruits during storage. The correlation analysis showed that flesh H2O2 content was negativelyrelated to firmness and also peel H2O2 content to peel chlorophyll a+b content. These results suggested that the1-MCP treatment could delay the fruit softening and chlorophyll degradation by suppressing the accumulation ofH2O2 content during and after cold storage in ‘Jingbaili’ pear.
Yu Dong,Liqin Liu,Zhe Zhao,Huanhuan Zhi,Junfeng Guan 한국원예학회 2015 Horticulture, Environment, and Biotechnology Vol.56 No.2
1-methylcyclopropene (1-MCP) has been shown to delay fruit ripening and senescence during storage. In this study, we investigated the effects of 1.0 μL·L-1 1-MCP on the biochemical changes and cellular ultra-structure of the core tissue in ‘Yali’ pear (Pyrus bretschneideri Rehd.) fruits stored at 25 ± 2°C. Our results showed that 1-MCP treatment significantly decreased the rates of respiration and ethylene production before their climacteric peaks, inhibited the development of core browning, lowered the chlorogenic acid content and polyphenol oxidase activity before the onset of core browning, and preserved high levels of superoxide dismutase activity, ascorbic acid, and glutathione contents. Furthermore, it suppressed the accumulation of hydrogen peroxide, superoxide anion, and malondialdehyde in the core tissue, maintained the integral structure of the cell membrane and organelle, and delayed the accumulation of electron-opaque matters in the vacuoles of core cells. These results suggested that 1-MCP treatment could reduce the injury caused by reactive oxygen, inhibit the oxidation of phenolics, and keep the cell membrane intact in core cells, thus, delaying the core browning in ‘Yali’ pear during storage.
Knockout of Myostatin by Zinc-finger Nuclease in Sheep Fibroblasts and Embryos
Zhang, Xuemei,Wang, Liqin,Wu, Yangsheng,Li, Wenrong,An, Jing,Zhang, Fuchun,Liu, Mingjun Asian Australasian Association of Animal Productio 2016 Animal Bioscience Vol.29 No.10
Myostatin (MSTN) can negatively regulate the growth and development of skeletal muscle, and natural mutations can cause "double-muscling" trait in animals. In order to block the inhibiting effect of MSTN on muscle growth, we transferred zinc-finger nucleases (ZFN) which targeted sheep MSTN gene into cultured fibroblasts. Gene targeted colonies were isolated from transfected fibroblasts by serial dilution culture and screened by sequencing. Two colonies were identified with mono-allele mutation and one colony with bi-allelic deletion. Further, we introduced the MSTN-ZFN mRNA into sheep embryos by microinjection. Thirteen of thirty-seven parthenogenetic embryos were targeted by ZFN, with the efficiency of 35%. Our work established the technical foundation for generation of MSTN gene editing sheep by somatic cloning and microinjection ZFN into embryos.
Long, Zhi,Gao, Liqin,Li, Yankai,Kang, Baotao,Lee, Jin Yong,Ge, Junjie,Liu, Changpeng,Ma, Shuhua,Jin, Zhao,Ai, Hongqi American Chemical Society 2017 ACS APPLIED MATERIALS & INTERFACES Vol.9 No.44
<P>The self-assembly powder (SAP) with varying Nafion content was synthesized and characterized by XRD, XPS, HRTEM, and mapping. It is observed that the oxygen from oxygen functional groups transfers to the surface of Pt and generate PtO during the process of self-assembly with the mechanism of micro galvanic cell, where Pt, carbon black, and Nafion act as the anode, cathode and electrolyte, respectively. The appearance of PtO on the surface of Pt leads to a turnover of Nafion structure, and therefore more hydrophilic sulfonic groups directly contact with Pt, and thus the triple-phase boundary (TPB) has been expanded.</P>
Guo Yajing,Peng Xuling,Liu Fanfei,Zhang Qi,Ding Liqin,Li Gen,Qiu Feng 대한약학회 2024 Archives of Pharmacal Research Vol.47 No.5
A balance between the development and suppression of inflammation can always be found in the body. When this balance is disturbed, a strong inflammatory response can damage the body. It sometimes is necessary to use drugs with a significant anti-inflammatory effect, such as nonsteroidal anti-inflammatory drugs and steroid hormones, to control inflammation in the body. However, the existing anti-inflammatory drugs have many adverse effects, which can be deadly in severe cases, making research into new safer and more effective anti-inflammatory drugs necessary. Currently, numerous types of natural products with anti-inflammatory activity and distinct structural features are available, and these natural products have great potential for the development of novel anti-inflammatory drugs. This review summarizes 260 natural products and their derivatives with anti-inflammatory activities in the last two decades, classified by their active ingredients, and focuses on their structure–activity relationships in anti-inflammation to lay the foundation for subsequent new drug development. We also elucidate the mechanisms and pathways of natural products that exert anti-inflammatory effects via network pharmacology predictions, providing direction for identifying subsequent targets of anti-inflammatory natural products.
Kinetics and Modeling for Extraction of Chrysin from Oroxylum indicum Seeds
Li Zhou,Ting Jing,Peipei Zhang,Liqin Zhang,Shaona Cai,Tingting Liu,Huihui Fan,Guangde Yang,Rong Lin,Jiye Zhang 한국식품과학회 2015 Food Science and Biotechnology Vol.24 No.6
Research on extraction of chrysin is crucial for theoretical purposes and for food industrial bioprocesses. Optimization and kinetics of chrysin extraction from seeds of Oroxylum indicum (L.) Vent. were analyzed using agitated solid-liquid extractions with ethanol and water mixtures. The influence of extraction process parameters was investigated. Optimized conditions for chrysin extraction were a 0.2 mole fraction of ethanol as an extraction solvent, a temperature of 318 K, an agitation speed 1,400 rpm, and a solid to solvent ratio of 1:30. The extraction kinetic behavior of chrysin followed first order kinetics. The kinetic expression developed by Spiro and Siddique was used and the model was in agreement with experimental results. The diffusion coefficient ranged from 1.38×10−11 to 19.43×10−11 m2·s−1 and the activation energy for extraction kinetics was 21.85 kJ·mol−1.
Kim, Jun Sung,Khim, Seunghyun,Yan, Liqin,Manivannan, N,Liu, Yong,Kim, Ingyu,Stewart, G R,Kim, Kee Hoon IOP Pub 2009 Journal of Physics, Condensed Matter Vol.21 No.10
<P>In order to investigate whether magnetism and superconductivity coexist in Co-doped SrFe<SUB>2</SUB>As<SUB>2</SUB>, we have prepared single crystals of SrFe<SUB>2−<I>x</I></SUB>Co<SUB><I>x</I></SUB>As<SUB>2</SUB>, <I>x</I> = 0 and 0.4, and characterized them via x-ray diffraction, electrical resistivity in zero and applied field up to 9 T as well as at ambient and applied pressure up to 1.6 GPa, and magnetic susceptibility. At <I>x</I> = 0.4, there is both magnetic and resistive evidence for a spin density wave transition at 120 K, while <I>T</I><SUB>c</SUB> = 19.5 K—indicating coexistent magnetism and superconductivity. A discussion of how these results compare with reported results, both in SrFe<SUB>2−<I>x</I></SUB>Co<SUB><I>x</I></SUB>As<SUB>2</SUB> and in other doped 122 compounds, is given. </P>