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        The Therapeutic Effects of Tectorigenin on Chemically Induced Liver Fibrosis in Rats and an Associated Metabonomic Investigation

        Xing-Xi Gao,Jun-Hua Wu,Da-Hua Shi,Yun-Xi Chen,Jiang-Tao Cui,Yu-Rong Wang,Chun-Ping Jiang 대한약학회 2012 Archives of Pharmacal Research Vol.35 No.8

        The aim of this study was to investigate the effects of tectorigenin on chemically induced liver fibrosis in rats. Liver fibrosis was induced in rats with carbon tetrachloride, a diet high in fat, cholesterol and alcohol in the drinking water. Our results indicate that tectorigenin treatment significantly inhibited the increases in the activities of alanine aminotransferase (ALT),aspartate aminotransferase (AST) and the increases in the serum levels of hyaluronate (HA), laminin (LN) and procollagen III N-terminal peptide (PIIIP); tectorigenin treatment also significantly inhibited the increases in the amount of collagen in the livers of the fibrogenic rats. Chemically induced liver fibrosis caused a drop in the serum albumin concentration and a decrease in the ratio of albumin to globulin (A/G). Tectorigenin caused a remarkable increase at a dose of 30 mg/kg, but only a slight increase at the lower doses. Tectorigenin was also able to inhibit the increase in the liver lipid peroxidation (LPO), as well as the decrease in the activities of liver superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px), caused by liver fibrosis. In addition, we present a related metabolic profile determined, using a 1H NMR spectroscopy and multivariate pattern recognition techniques. The results were consistent with the pathological examination, liver function analysis and liver fibrosis marker analysis. Furthermore, tectorigenin does not cause acute toxicity.

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        Resistance selection with cadmium and changes in the activities of antioxidases in Boettcherisca peregrina (Diptera: Sarcophagidae)

        Guo-Xing Wu,Xi Gao,Qing Tan,Zheng-Yue Li,Cui Hu,Gong-yin Ye 한국응용곤충학회 2014 Journal of Asia-Pacific Entomology Vol.17 No.2

        In order to establish a physiological link between antioxidases and the resistance level of insects to cadmium(Cd), natural populations of Boettcherisca peregrina (Diptera: Sarcophagidae)weremaintained for 20 generationsand reared either on an uncontaminated diet or on a diet contaminated with cadmium (Cd) at a concentrationequivalent to the median lethal concentration (LC50) as determined every five generations. A relatively susceptiblestrain (S) and a Cd-resistant strain (R) were selected. Themetal accumulation, growth and development, reproduction,and antioxidant enzyme activities in these strains were analyzed. The results showed that R-strain organismshad enhanced juvenile survivorship, increased Cd accumulation, and increased adult female fecundity whencompared with S-strain. The larval enzyme activities of superoxide dismutase (SOD), catalase (CAT), glutathionereductase (GR), and glutathione S-transferase (GST) in R-strain larvae were higher than those in S-strain larvaewhen fed diets with or without Cd. This indicates that Cd resistance in B. peregrina larvae is mediated by SOD,CAT, GR, and GST.

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        Effects of Copolymerization Temperatures on Structure and Properties of Melt-Spinnable Acrylonitrile-Methyl Acrylate Copolymers and Fibers

        Na Han,Xing-xiang Zhang,Wan-yong Yu,Xi-yin Gao 한국고분자학회 2010 Macromolecular Research Vol.18 No.11

        A series of 85/15 AN/MA copolymers (acrylonitrile-methyl acrylate copolymers with feed ratio of 85/15 mol%) were synthesized by aqueous precipitation polymerization at 20, 30, and 40 oC, and the copolymers were used to produce a series of fibers by melt spinning. The copolymers and fibers were characterized by element analysis (EA), nuclear magnetic resonance (1H NMR and 13C NMR), capillary rheometry, differential scanning calorimetry (DSC), X-ray diffraction (XRD), and scanning electronic microscopy (SEM). The average length of the contiguous AN units synthesized at 30 oC had a maximum value of 10.53. Aqueous polymerization at 30 oC resulted the lowest glass transition temperature (Tg) of 87.1 oC, the lowest melting point (Tm) of 154.5 oC,and the highest decomposition temperature (Td) of 325.0 oC. 85/15 AN/MA prepared at 20 and 30 oC exhibited a better fluidity at 210 oC. The ideal reaction temperatures for melt processing of the AN/MA copolymers were found to be 20 and 30 oC.

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        Evaluation of the Immunomodulatory and Anti-inflammatory Activities of Honey Bee Larva Powder

        Kejuan Li,Shuang Sun,Masakatsu Kageyama,Long Xiao,Guoqing Xing,Ran Gao,Fengming You,Xi Fu,Zhenya Zhang 한국식품영양과학회 2020 Journal of medicinal food Vol.23 No.7

        Honey bee larva powder (HLP) has traditionally been used as a daily supplement and tonic for health promotion with an uncertain scientific basis. In this study, B16-F10 tumor-bearing mice were established to evaluate the immunomodulatory activity of HLP. The proliferation and apoptosis assays were performed to evaluate the anti-inflammatory activity of honey bee larva extract (HLE) in RAW 264.7 macrophage. The in vivo experimental results demonstrated that the oral administration of freeze-dried HLP (4 and 6 g/kg) significantly enhanced the spleen index, the percentage of CD4+cells, and the ratio of CD4+ and CD8+ T lymphocytes (CD4+/CD8+) in the peripheral blood compared with those in the tumor control mice. The in vitro studies demonstrated the potent immunomodulatory activities of HLE through the induction of RAW 264.7 macrophage proliferation and the mitigation of doxorubicin (DOX)-induced toxicity. HLE also exhibits anti-inflammatory activity by decreasing the production of nitric oxide (NO) and the cytokine level of interleukin-6 (IL-6) in lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophage. The present study provides important scientific evidence for the immunomodulatory and anti-inflammatory activities of HLP and HLE.

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