摘要：
The effects of n3 polyunsaturated fatty acids (PUFA) on cardiovascular disease are controversial. We currently explored the effects of various ratios of docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) on high-fat-induced atherosclerosis. In model apoE(-/-) mice, high-fat diets (HFD) were partially replaced with fish and algal oils (DHA/EPA 2:1, 1:1 and 1:2) and/or plant oils enriched in linoleic and alpha-linolenic acids with an n6/n3 ratio of 4:1. PUFA supplementation significantly reduced the atherosclerotic plaque area, serum lipid profile, inflammatory response, aortic ROS production, proinflammatory factors and scavenger receptor expression as compared to those in the HFD group. However, plant oils did not have a significant effect on the following: serum HDL-C level; aortic ABCA1, ABCG1 and LAL mRNA expression; and CD36 and LOX-1 protein expression. Compared to the plant-oil-treated group, the DHA/EPA 1:1 group had a smaller atherosclerotic plaque area, higher serum HDL-C levels and lesser CD36 and MSR-1 mRNA expression; the DHA/EPA 2:1 group had lower serum TC, LDL-C and TNF-a levels and lower aortic ROS levels. Our study suggested that n3 PUFA from animals had more potent atheroprotective effects than that from plants. Supplementation involving higher DHA/EPA ratios and an n6/n3 ratio of 4:1 was beneficial for reducing serum "bad cholesterol" and a 1:1 DHA/EPA ratio with an n6/n3 ratio of 4:1 was beneficial for improving serum "good cholesterol" and inhibiting ox-LDL uptake. Our results suggest that achieving an n6/n3 ratio of 4:1 in the diet is also important in addition to having an optimal DHA/EPA ratio. (C) 2016 Elsevier Inc. All rights reserved.
作者机构：
[Chen Z.; Liu Z.; Zhang K.; Li Q.; Wang L.; Yin H.] College of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, 430023, China
通讯机构：
[Zhiguo Liu] C;College of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan 430023, China
作者机构：
[Xiu-Ju Zhao; Zhiguo Liu] School of Biology and Pharmaceutical Engineering,Wuhan Polytechnic University;[Xiu-Ju Zhao; Zhiguo Liu] Wuhan Magnetic Resonance Center;[Xiu-Ju Zhao; Zhiguo Liu] Wuhan Institute of Physics and Mathematics,Chinese Academy of Sciences
会议名称：
2014年第十二届全国脂质与脂蛋白学术会议
会议时间：
2014-10-10
会议地点：
杭州
会议主办单位：
中国生物化学与分子生物学会脂质与脂蛋白专业委员会
会议论文集名称：
2014年第十二届全国脂质与脂蛋白学术会议论文集
摘要：
<正>A food supplement is a complex multicomponent system.Previous researches of food supplements mainly focused on roles and actions of choline,taurine,carnitine,inositol,omega-3 polyunsaturated fatty acids（PUFAs,e.g.ALA,EPA,DPA,DHA）,omega-6 PUFAs（e.g.ARA）and long-chain saturated fatty acids（SFAs）.However,short-and medium-chain SFAs,sphingolipids,and the whole profile/spectrum are less concerned.
作者：
Wang Hualin;Yuan Fahu;Zhao Xiuju（赵秀举）;Zhang Hongyu;Liu Zhiguo
作者机构：
[Zhao Xiuju; Wang Hualin; Yuan Fahu; Zhang Hongyu; Liu Zhiguo] School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University
会议名称：
2014年第十二届全国脂质与脂蛋白学术会议
会议时间：
2014-10-10
会议地点：
杭州
会议主办单位：
中国生物化学与分子生物学会脂质与脂蛋白专业委员会
会议论文集名称：
2014年第十二届全国脂质与脂蛋白学术会议论文集
摘要：
<正>Background:The advances in high-throughput technologies have allowed for the massive analysis of genomic data,providing benefits for the characterization of transcriptome architectures.Recent studi
摘要：
The incidence of non-tuberculous mycobacteria (NTM)-related death has increased globally recently. To obtain information of the species and characterization of pathogens involved in NTM pulmonary infection in Southern-central China, we identified 160 non-tuberculous infection cases from 3995 acid-fast bacilli (AFB)-positive tuberculous suspects. We then randomly selected 101 non-tuberculous patients, isolated bacteria from their sputa and genotyped the pathogens using the 16S rRNA gene and 16S-23S rRNA internal transcribed spacer sequences. M. intracellulare (32.67%, 33/101), M. abscessus (32.67%, 33/101) and M. fortuitum (7.92%, 8/101) are identified in these isolates. Surprisingly, non-mycobacteria including Gordonia (8.91%, 9/101), Nocardia (5.94%, 6/101) and Tsukamurella (0.99%, 1/101) are also discovered, and the case of Tsukamurella pulmonis infection is first discovered in Southern-central China. Moreover, species of M. mucogenicum group, M. chubuense, M. kansasii, M. gastri, M. avium, M. porcinum and M. smegmatis are identified. In addition, nine immune compromised cases (8.91%, 9/101), including type two diabetes mellitus and HIV/AIDS are found to be infected with non-tuberculous bacteria. This study revealed the distribution and characteristics of non-tuberculous AFB pathogen infection occurred in Southern-central China, and suggested that physicians should be alert of the emerging of NTM and non-mycobacteria infection in AFB positive cases and take caution when choosing chemotherapy for tuberculosis-like pulmonary infections. Generally, this study may help with the development of new strategy for the diagnosis and treatment of mycobacterial infection.
摘要：
Hydrodistillation, solvent, enzymolysis and supercritical fluid extraction (SFE) methods were used to extract the essential oil of Osmanthus fragrans Lour.. The components of the essential oil were analyzed by gas chromatography/mass spectrometry (GC-MS). The yields of essential oil extracted by theose four different methods from O. fragrans Lour were were 0.14%, 0.89%, 0.94%, 1.11% respectively, based on the dry weight. Trans-linalool oxide, cis-linalool oxide, beta-ionone, 9-Tricosene, hexadecanoic acid, 9,12,15-octadecatrienoic acid and 9,12,15-octadecatrienoic acid, ethyl ester were the primary components of O. fragrans essential oil. The chemical analysis revealed that the percentage of those primary components of essential oil extracted by different methods were widely different. The results indicated that supercritical fluid extraction method with suitable extract conditions was more selective than the other methods. SFE is the best method for extracting the essential oil of O. fragrans which was solvent free and available in high purity at relatively low cost in the extraction of essential oil.
关键词：
Capsaicin;Intracellular second messenger;Nociceptors;Pain;TRPV1 receptor
摘要：
Intracellular second messengers play an important role in capsaicin- and analogous-induced sensitization and desensitization in pain. Fluorescence Ca2+ imaging, enzyme immunoassay and PKC assay kit were used to determine a novel mechanism of different Ca2+ dependency in the signal transduction of capsaicin-induced desensitization. On the average, capsaicin increased cAMP, cGMP concentration and SP release in bell-shaped concentration-dependent manner, with the maximal responses at concentrations around 1 mu M, suggesting acute desensitization of TRPV1 receptor activation. Capsaicin-induced intracellular Ca2+ concentration ([Ca2+](i)) increase depended on extracellular Ca2+ influx as an initial trigger. The Ca2+ influx by capsaicin increased PKC activation and SP release. These increases were completely abolished in Ca2+-free solution, suggesting that the modulation of capsaicin on PKC and SP are Ca2+-dependent. Interestingly, the maximal cAMP increase by TRPV1 activation was not blocked Ca2+ removal, suggesting at least in part a Ca2+-independent pathway is involved. Further study showed that cAMP increase was totally abolished by G-protein and adenylate cyclase (AC) antagonist, suggesting a G-protein-dependent pathway in cAMP increase. However, SP release was blocked by inhibiting PKC, but not G-protein or AC, suggesting a G-protein independent pathway in SP release. These results suggest that both Ca2+-dependent and independent mechanisms are involved in the regulation of capsaicin on second messengers systems, which could be a novel mechanism underlying distinct desensitization of capsaicin and might provide additional opportunities in the development of effective analgesics in pain treatment. (c) 2012 Elsevier Ireland Ltd. All rights reserved.
摘要：
Bacillus cereus strains containing voitoxin cereulide are pathogenic bacteria. The cereulide is produced by B. cereus strains containing plasmid pCER270. To establish a specific loop-mediated isothermal amplification (LAMP) method detecting pathogenic B. cereus, LAMP primer sets were designed based on 16SrDNA and pCER270 plasmid cesA sequence. The LAMP reaction was carried out under optimal conditions with 2 mM of Mg2+ at 65C for 1 h. Specificity of LAMP primers were validated by assaying 19 B. cereus strains with and without pCER270 plasmid and 42 non-B. cereus species. Detection limits of the LAMP assay were 1 cfu/mL of B. cereus without pCER270 plasmid and 11 cfu/mL of pathogenic B. cereus with pCER270 plasmid. Furthermore, liquid milk samples were detected by the LAMP method. The results showed that LAMP method is a reliable method used for rapid detection of B. cereus and its pathogenic strains of milk and other food stuff.
Loop-mediated isothermal amplification (LAMP) is a novel nucleic acid amplification method. In this study LAMP method was specific and sensitive for detection of B. cereus which grown in liquid medium or on solid medium, or from liquid milk samples as well. In addition, the pathogenic strains expressed voitoxin cereulide could be readily identified after amplification using specific LAMP primer sets. The whole procedure is simple and rapid, the reaction carried out in tens of minutes at a constant temperature. LAMP could be routinely used for B. cereus especially pathogenic strains in food.
作者机构：
[李琦; 刘志国; 李奎; 陈江源] School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan 430023, China;[袁媛; 黄璐琦] Institute of Chinese Materia Medica, China Academy of Traditional Chinese Medicine, Beijing 100700, China
通讯机构：
[Li, K.] S;School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, China
关键词：
insulin;very low density lipoprotein receptor;cell proliferation;metabolic regulation
摘要：
This study examined the effect of insulin on the expression of very low density lipoprotein receptor (VLDLR) subtypes of SGC7901 cells and discussed its biological implication. In vitro, moderately or poorly-differentiated human gastric adenocarcinoma cell line SGC7901 was incubated with insulin for different lengths of time, and then the expression of protein and RNA level in VLDLR subtypes were detected by Western blotting and real-time PCR, respectively. The results showed that, at certain time interval, insulin could down-regulate expression of type I VLDLR and up-regulate the expression of type II VLDLR in SGC7901 cells, at both protein and RNA level. We are led to conclude that insulin serves as a regulator in maintaining the balance between glucose and lipid metabolism in vivo, possibly through its effect on the differential expression of VLDLR subtypes.
