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Zhu R.,Liaoning University | Li T.,Liaoning University | Dong Y.,Liaoning University | Liu Y.,Liaoning University | And 4 more authors.
Food Research International | Year: 2013

The effects of haw pectin pentasaccharide (HPPS) on hypercholesterolemia were investigated in high-fat fed mice. HPPS significantly decreased the levels of serum total cholesterol (TC) and low density lipoprotein cholesterol (LDL-c), and hepatic TC. It also significantly decreased the activities and gene expressions of 3-hydroxy-3-methyl-glutaryl-CoA reductase (HMGCR) and acyl-coenzyme A: cholesterol acyl-transferase (ACAT) in the liver. While, the serum high density lipoprotein cholesterol (HDL-c), fecal bile acids, and the activity and gene expressions of cholesterol 7α-hydroxylase (CYP7A1) were significantly increased by HPPS administration. Moreover, HPPS tended to increase the fecal TC level and to down-regulate the expressions of sterol regulatory element-binding protein 2 (SREBP-2) and LDL receptor in the liver, but no statistical significance was detected. The results revealed that HPPS have great potential in the development of functional food to improve cholesterol metabolism. © 2013 Elsevier Ltd. Source

Zhu R.-G.,Liaoning University | Sun Y.-D.,Liaoning University | Li T.-P.,Liaoning University | Chen G.,Liaoning Academy of Forestry science | And 7 more authors.
Chemico-Biological Interactions | Year: 2015

This study aims to compare the effects of feeding haw pectin (HP), haw pectin hydrolyzates (HPH), and haw pectin pentasaccharide (HPPS) on the cholesterol metabolism of hypercholesterolemic hamsters induced by high-cholesterol diets. The animals were fed a standard diet (SD), high-cholesterol diet (HCD), or HCD plus HP, HPH, or HPPS at a dose of 300 mg/kg body weight for 4 weeks. Results showed that HPPS was more effective than HP and HPH in decreasing the body weight gain (by 38.2%), liver weight (by 16.4%), and plasma and hepatic total cholesterol (TC; by 23.6% and 27.3%, respectively) of hamsters. In addition, the bile acid levels in the feces were significantly higher by 39.8% and 132.8% in the HPH and HPPS groups than in the HCD group. Such changes were not noted in the HP group. However, the HP group had higher cholesterol excretion capacities than the HPH and HPPS groups by inhibiting cholesterol absorption in the diet, with a 21.7% increase in TC excretion and a 31.1% decrease in TC absorption. Thus, HPPS could be a promising anti-atherogenic dietary ingredient for the development of functional food to improve cholesterol metabolism. Source

Han H.,Chinese Academy of Forestry | Sun X.M.,Chinese Academy of Forestry | Xie Y.H.,Chinese Academy of Forestry | Feng J.,Liaoning Academy of Forestry science | Zhang S.G.,Chinese Academy of Forestry
Silvae Genetica | Year: 2013

Adventitious root development is crucial for cutting propagation in hybrid larch. In the present study semilignified cuttings of Larix kaempferi × L. olgensis clones were used to study the morphological and anatomical changes during the different development stages and compare the changes in contents of endogenous phytohormone in two clones with evidently different rooting capacity (25-5 and 23-12), and the effects of exogenous Indole-3-Butyric Acid (IBA) on phytohormone content of a very low native rooting capacity clone (8-9) during the development of adventitious roots. The results showed that the development of adventitious root in semi-lignified cuttings involves three key stages: root cell dedifferentiation and division (14-18 DAC); meristem formation and development (25-35 DAC); root formation and elongation (50-55 DAC). The endogenous phytohormones play a key role during adventitious root development. For 25-5 and 23-12, the level of endogenous phytohormones, especially the ABA content, has an important effect on rooting capacity. For the effects of IBA on 8-9, except lower ABA content, the temporary peak of IAA on the 1 DAC was important for initiating the rooting process. The ratio of (IAA + GA 3+ ZR)/ABA can be used as an indicator of rooting capacity. The anatomical and physiological data described here for semi-lignified cuttings of L. kaempferi × L. olgensis clones improves our knowledge of adventitious roots development. Our study will also benefit future research on examining the molecular mechanisms of the adventitious roots development in hybrid larch. Source

Sun S.-P.,General Station of Forest Pest Management | Luan Q.-S.,Liaoning Academy of Forestry science | Sheng M.-L.,General Station of Forest Pest Management
Journal of Hymenoptera Research | Year: 2012

A new species, Triclistus strobilius sp. n., belonging to the subfamily Metopiinae (Hymenoptera, Ichneumonidae), reared from Dioryctria pryeri Ragonot, D. rubella Hampson and Gravitarmata margarotana (Hein) in Liaoning, Hunan provinces and Beijing, is reported and described. Illustrations of the new species are provided. © Flávio O. Francisco et al. Source

Li T.-P.,Liaoning University | Li T.-P.,Engineering Technology Research Center for Food Bioprocessing of Liaoning Province | Zhu R.-G.,Liaoning University | Zhu R.-G.,Engineering Technology Research Center for Food Bioprocessing of Liaoning Province | And 6 more authors.
Journal of Agricultural and Food Chemistry | Year: 2013

The regulatory effects of haw pectin pentaoligosaccharide (HPPS) on fatty acid oxidation-related enzyme activities and mRNA levels were investigated in the liver of high fat diet induced hyperlipidemic mice. Results showed that HPPS (150 mg/kg for 10 weeks) significantly suppresses weight gain (32.3 ± 0.26 and 21.1 ± 0.14 g for high-fat diet and HPPS groups, respectively), decreases serum triacylglycerol levels (1.64 ± 0.09 and 0.91 ± 0.02 mmol/L, respectively), and increases lipid excretion in feces (55.7 ± 0.38 and 106.4 ± 0.57 mg/g for total lipid, respectively), compared to high-fat diet as control. HPPS significantly increased the hepatic fatty acid oxidation-related enzyme activities of acyl-CoA oxidase, carnitine palmitoyltransferase I, 3-ketoacyl-CoA thiolase, and 2,4-dienoyl-CoA reductase by 53.8, 74.2, 47.1, and 24.2%, respectively. Meanwhile, the corresponding mRNAs were up-regulated by 89.6, 85.8, 82.9, and 30.9%, respectively. Moreover, HPPS was able to up-regulate the gene and protein expressions of peroxisome proliferator-activated receptor α. Results suggest that continuous HPPS ingestion may be used as dietary therapy to prevent obesity and cardiovascular diseases. © 2013 American Chemical Society. Source

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