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https://www.readbyqxmd.com/read/28335566/profiling-and-preparation-of-metabolites-from-pyragrel-in-human-urine-by-online-solid-phase-extraction-coupled-with-high-performance-liquid-chromatography-tandem-mass-spectrometry-followed-by-a-macroporous-resin-based-purification-approach
#1
Xin Zhao, Jingjing Jiang, Guang Yang, Jie Huang, Guoping Yang, Guangwei He, Zhaoxing Chu, Taijun Hang, Guorong Fan
Pyragrel, a new anticoagulant drug, is derived from the molecular combination of ligustrazine and ferulic acid. Pyragrel showed significant inhibitory activity against platelet aggregation induced by adenosine diphosphate (ADP), and had been approved for a phase I clinical trial by CFDA. To characterize the metabolites of Pyragrel in human urine after intravenous administration, a reliable online solid-phase extraction couple with high performance liquid chromatography tandem mass spectrometry (online SPE-HPLC-MS(n)) method was conceived and applied...
March 21, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28335559/the-optimization-and-characterization-of-an-rna-cleaving-fluorogenic-dnazyme-probe-for-mda-mb-231-cell-detection
#2
Pengcheng Xue, Shengnan He, Yu Mao, Long Qu, Feng Liu, Chunyan Tan, Yuyang Jiang, Ying Tan
Breast cancer is one of the most frequently diagnosed cancers in females worldwide and lacks specific biomarkers for early detection. In a previous study, we obtained a selective RNA-cleaving Fluorogenic DNAzyme (RFD) probe against MDA-MB-231 cells, typical breast cancer cells, through the systematic evolution of ligands by exponential process (SELEX). To improve the performance of this probe for actual application, we carried out a series of optimization experiments on the pH value of a reaction buffer, the type and concentration of cofactor ions, and sequence minimization...
March 21, 2017: Sensors
https://www.readbyqxmd.com/read/28335535/enterovirus-71-neutralizing-antibodies-seroepidemiological-research-among-children-in-guangzhou-china-between-2014-and-2015-a-cross-sectional-study
#3
Dingmei Zhang, Yan Chen, Xiashi Chen, Zhenjian He, Xun Zhu, Yuantao Hao
A hand-foot-mouth disease outbreak occurred in 2014 around Guangdong. The purpose of this study was investigating the status and susceptibility of infectious neutralizing antibodies to enterovirus 71 among children so as to provide scientific evidence for the population immunity level of hand-foot-mouth disease and prepare for enterovirus 71 vaccination implementation. Serum specimens were collected from children in communities from January 2014 to March 2015 in Guangzhou. A total of 197 serum samples from children 1-5 years old were collected for this cross-sectional study via non-probabilistic sampling from the database of Chinese National Science and Technique Major Project...
March 20, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28335505/porcine-epidemic-diarrhea-virus-induces-autophagy-to-benefit-its-replication
#4
Xiaozhen Guo, Mengjia Zhang, Xiaoqian Zhang, Xin Tan, Hengke Guo, Wei Zeng, Guokai Yan, Atta Muhammad Memon, Zhonghua Li, Yinxing Zhu, Bingzhou Zhang, Xugang Ku, Meizhou Wu, Shengxian Fan, Qigai He
The new porcine epidemic diarrhea (PED) has caused devastating economic losses to the swine industry worldwide. Despite extensive research on the relationship between autophagy and virus infection, the concrete role of autophagy in porcine epidemic diarrhea virus (PEDV) infection has not been reported. In this study, autophagy was demonstrated to be triggered by the effective replication of PEDV through transmission electron microscopy, confocal microscopy, and Western blot analysis. Moreover, autophagy was confirmed to benefit PEDV replication by using autophagy regulators and RNA interference...
March 19, 2017: Viruses
https://www.readbyqxmd.com/read/28335480/weighted-kernel-entropy-component-analysis-for-fault-diagnosis-of-rolling-bearings
#5
Hongdi Zhou, Tielin Shi, Guanglan Liao, Jianping Xuan, Jie Duan, Lei Su, Zhenzhi He, Wuxing Lai
This paper presents a supervised feature extraction method called weighted kernel entropy component analysis (WKECA) for fault diagnosis of rolling bearings. The method is developed based on kernel entropy component analysis (KECA) which attempts to preserve the Renyi entropy of the data set after dimension reduction. It makes full use of the labeled information and introduces a weight strategy in the feature extraction. The class-related weights are introduced to denote differences among the samples from different patterns, and genetic algorithm (GA) is implemented to seek out appropriate weights for optimizing the classification results...
March 18, 2017: Sensors
https://www.readbyqxmd.com/read/28335423/treatment-with-17%C3%AE-estradiol-reduced-body-weight-and-the-risk-of-cardiovascular-disease-in-a-high-fat-diet-induced-animal-model-of-obesity
#6
Wei-Jen Ting, Chih-Yang Huang, Chong-He Jiang, Yueh-Min Lin, Li-Chin Chung, Chia-Yao Shen, Peiying Pai, Kuan-Ho Lin, Vijaya Padma Viswanadha, Shih-Chieh Liao
Estrogen receptor α (ERα) and estrogen receptor β (ERβ) play important roles in cardiovascular disease (CVD) prevention. Recently, these estrogen receptors were reconsidered as an important treatment target of obesity leading to CVD. In this study, 17β-estradiol (17β-E) replacement therapy applied to high-fat diet-induced obese C57B male mice and ovariectomized (OVX) rats were evaluated, and the protective effects against high-fat diet-induced obesity were assessed in C57B mouse hearts. The results showed that 17β-E treatment activated both ERα and ERβ, and ERβ levels increased in a dose-dependent manner in high-fat diet C57B mouse cardiomyocytes following 17β-E treatment...
March 14, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28335420/efforts-and-challenges-in-engineering-the-genetic-code
#7
REVIEW
Xiao Lin, Allen Chi Shing Yu, Ting Fung Chan
This year marks the 48th anniversary of Francis Crick's seminal work on the origin of the genetic code, in which he first proposed the "frozen accident" hypothesis to describe evolutionary selection against changes to the genetic code that cause devastating global proteome modification. However, numerous efforts have demonstrated the viability of both natural and artificial genetic code variations. Recent advances in genetic engineering allow the creation of synthetic organisms that incorporate noncanonical, or even unnatural, amino acids into the proteome...
March 14, 2017: Life
https://www.readbyqxmd.com/read/28335409/the-formyl-peptide-receptors-diversity-of-ligands-and-mechanism-for-recognition
#8
REVIEW
Hui-Qiong He, Richard D Ye
The formyl peptide receptors (FPRs) are G protein-coupled receptors that transduce chemotactic signals in phagocytes and mediate host-defense as well as inflammatory responses including cell adhesion, directed migration, granule release and superoxide production. In recent years, the cellular distribution and biological functions of FPRs have expanded to include additional roles in homeostasis of organ functions and modulation of inflammation. In a prototype, FPRs recognize peptides containing N-formylated methionine such as those produced in bacteria and mitochondria, thereby serving as pattern recognition receptors...
March 13, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28335404/perceptions-of-health-co-benefits-in-relation-to-greenhouse-gas-emission-reductions-a-survey-among-urban-residents-in-three-chinese-cities
#9
Jinghong Gao, Guozhang Xu, Wenjun Ma, Yong Zhang, Alistair Woodward, Sotiris Vardoulakis, Sari Kovats, Paul Wilkinson, Tianfeng He, Hualiang Lin, Tao Liu, Shaohua Gu, Jun Wang, Jing Li, Jun Yang, Xiaobo Liu, Jing Li, Haixia Wu, Qiyong Liu
Limited information is available on the perceptions of stakeholders concerning the health co-benefits of greenhouse gas (GHG) emission reductions. The purpose of this study was to investigate the perceptions of urban residents on the health co-benefits involving GHG abatement and related influencing factors in three cities in China. Beijing, Ningbo and Guangzhou were selected for this survey. Participants were recruited from randomly chosen committees, following quotas for gender and age in proportion to the respective population shares...
March 13, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28335376/genetic-polymorphisms-contribute-to-the-individual-variations-of-imatinib-mesylate-plasma-levels-and-adverse-reactions-in-chinese-gist-patients
#10
Jing Liu, Zhiyu Chen, Hanmei Chen, Yingyong Hou, Weiqi Lu, Junyi He, Hanxing Tong, Yuhong Zhou, Weimin Cai
Imatinib mesylate (IM) has dramatically improved the outcomes of gastrointestinal stromal tumor (GIST) patients. However, the clinical responses of IM may considerably vary among single individuals. This study aimed to investigate the influences of genetic polymorphisms of drug-metabolizing enzyme (CYP3A4), transporters (ABCB1, ABCG2), and nuclear receptor (Pregnane X Receptor (PXR, encoded by NR1I2)) on IM plasma levels and related adverse reactions in Chinese GIST patients. A total of 68 Chinese GIST patients who have received IM 300-600 mg/day were genotyped for six single nucleotide polymorphisms (SNPs) (CYP3A4 rs2242480; ABCB1 rs1045642; ABCG2 rs2231137; NRI12 rs3814055, rs6785049, rs2276706), and the steady-state IM trough plasma concentrations were measured by a validated HPLC method...
March 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28335351/modified-nanoemulsions-with-iron-oxide-for-magnetic-resonance-imaging
#11
Yongyi Fan, Rui Guo, Xiangyang Shi, Steven Allen, Zhengyi Cao, James R Baker, Su He Wang
A nanoemulsion (NE) is a surfactant-based, oil-in-water, nanoscale, high-energy emulsion with a mean droplet diameter of 400-600 nm. When mixed with antigen and applied nasally, a NE acts as a mucosal adjuvant and induces mucosal immune responses. One possible mechanism for the adjuvant effect of this material is that it augments antigen uptake and distribution to lymphoid tissues, where the immune response is generated. Biocompatible iron oxide nanoparticles have been used as a unique imaging approach to study the dynamics of cells or molecular migration...
November 25, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335337/effect-of-crystal-orientation-on-self-assembly-nanocones-formed-on-tungsten-surface-induced-by-helium-ion-irradiation-and-annealing
#12
Shilin Huang, Guang Ran, Penghui Lei, Shenghua Wu, Nanjun Chen, Ning Li
The self-assembly nanocone structures on the surface of polycrystalline tungsten were created by He⁺ ion irradiation and then annealing, and the resulting topography and morphology were characterized using atomic force microscopy and scanning electron microscopy. The cross-sectional samples of the self-assembly nanocones were prepared using an in situ-focused ion beam and then observed using transmission electron microscopy. The self-assembly nanocones were induced by the combined effect of He⁺ ion irradiation, the annealing process and the chromium impurity...
November 12, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335306/ionic-adsorption-and-desorption-of-cnt-nanoropes
#13
Jun-Jun Shang, Qing-Sheng Yang, Xiao-Hui Yan, Xiao-Qiao He, Kim-Meow Liew
A nanorope is comprised of several carbon nanotubes (CNTs) with different chiralities. A molecular dynamic model is built to investigate the ionic adsorption and desorption of the CNT nanoropes. The charge distribution on the nanorope is obtained by using a modified gradient method based on classical electrostatic theory. The electrostatic interactions among charged carbon atoms are calculated by using the Coulomb law. It was found here that the charged nanorope can adsorb heavy metal ions, and the adsorption and desorption can be realized by controlling the strength of applied electric field...
September 28, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335286/enhanced-end-contacts-by-helium-ion-bombardment-to-improve-graphene-metal-contacts
#14
Kunpeng Jia, Yajuan Su, Jun Zhan, Kashif Shahzad, Huilong Zhu, Chao Zhao, Jun Luo
Low contact resistance between graphene and metals is of paramount importance to fabricate high performance graphene-based devices. In this paper, the impact of both defects induced by helium ion (He⁺) bombardment and annealing on the contact resistance between graphene and various metals (Ag, Pd, and Pt) were systematically explored. It is found that the contact resistances between all metals and graphene are remarkably reduced after annealing, indicating that not only chemically adsorbed metal (Pd) but also physically adsorbed metals (Ag and Pt) readily form end-contacts at intrinsic defect locations in graphene...
August 26, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335239/a-flexible-360-degree-thermal-sound-source-based-on-laser-induced-graphene
#15
Lu-Qi Tao, Ying Liu, Zhen-Yi Ju, He Tian, Qian-Yi Xie, Yi Yang, Tian-Ling Ren
A flexible sound source is essential in a whole flexible system. It's hard to integrate a conventional sound source based on a piezoelectric part into a whole flexible system. Moreover, the sound pressure from the back side of a sound source is usually weaker than that from the front side. With the help of direct laser writing (DLW) technology, the fabrication of a flexible 360-degree thermal sound source becomes possible. A 650-nm low-power laser was used to reduce the graphene oxide (GO). The stripped laser induced graphene thermal sound source was then attached to the surface of a cylindrical bottle so that it could emit sound in a 360-degree direction...
June 7, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335195/pmn-pt-pvdf-nanocomposite-for-high-output-nanogenerator-applications
#16
Chuan Li, Wenbo Luo, Xingzhao Liu, Dong Xu, Kai He
The 0.7Pb(Mg1/3Nb2/3)O₃-0.3PbTiO₃(0.7PMN-0.3PT) nanorods were obtained via hydrothermal method with high yield (over 78%). Then, new piezoelectric nanocomposites based on (1-x)Pb(Mg1/3Nb2/3)O₃-xPbTiO₃ (PMN-PT) nanorods were fabricated by dispersing the 0.7PMN-0.3PT nanorods into piezoelectric poly(vinylidene fluoride) (PVDF) polymer. The mechanical behaviors of the nanocomposites were investigated. The voltage and current generation of PMN-PT/PVDF nanocomposites were also measured. The results showed that the tensile strength, yield strength, and Young's modulus of nanocomposites were enhanced as compared to that of the pure PVDF...
April 11, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28334899/association-analyses-of-east-asian-individuals-and-trans-ancestry-analyses-with-european-individuals-reveal-new-loci-associated-with-cholesterol-and-triglyceride-levels
#17
Cassandra N Spracklen, Peng Chen, Young Jin Kim, Xu Wang, Hui Cai, Shengxu Li, Jirong Long, Ying Wu, Ya Xing Wang, Fumihiko Takeuchi, Jer-Yuarn Wu, Keum-Ji Jung, Cheng Hu, Koichi Akiyama, Yonghong Zhang, Sanghoon Moon, Todd A Johnson, Huaixing Li, Rajkumar Dorajoo, Meian He, Maren E Cannon, Tamara S Roman, Elias Salfati, Keng-Hung Lin, Xiuqing Guo, Wayne H H Sheu, Devin Absher, Linda S Adair, Themistocles L Assimes, Tin Aung, Qiuyin Cai, Li-Ching Chang, Chien-Hsiun Chen, Li-Hsin Chien, Lee-Ming Chuang, Shu-Chun Chuang, Shufa Du, Qiao Fan, Cathy S J Fann, Alan B Feranil, Yechiel Friedlander, Penny Gordon-Larsen, Dongfeng Gu, Lixuan Gui, Zhirong Guo, Chew-Kiat Heng, James Hixson, Xuhong Hou, Chao Agnes Hsiung, Yao Hu, Mi Yeong Hwang, Chii-Min Hwu, Masato Isono, Jyh-Ming Jimmy Juang, Chiea-Chuen Khor, Yun Kyoung Kim, Woon-Puay Koh, Michiaki Kubo, I-Te Lee, Sun-Ju Lee, Wen-Jane Lee, Kae-Woei Liang, Blanche Lim, Sing-Hui Lim, Jianjun Liu, Toru Nabika, Wen-Harn Pan, Hao Peng, Thomas Quertermous, Charumathi Sabanayagam, Kevin Sandow, Jinxiu Shi, Liang Sun, Pok Chien Tan, Shu-Pei Tan, Kent D Taylor, Yik-Ying Teo, Sue-Anne Toh, Tatsuhiko Tsunoda, Rob M van Dam, Aili Wang, Feijie Wang, Jie Wang, Wen Bin Wei, Yong-Bing Xiang, Jie Yao, Jian-Min Yuan, Rong Zhang, Wanting Zhao, Yii-Der Ida Chen, Stephen S Rich, Jerome I Rotter, Tzung-Dau Wang, Tangchun Wu, Xu Lin, Bok-Ghee Han, Toshihiro Tanaka, Yoon Shin Cho, Tomohiro Katsuya, Weiping Jia, Sun-Ha Jee, Yuan-Tsong Chen, Norihiro Kato, Jost B Jonas, Ching-Yu Cheng, Xiao-Ou Shu, Jiang He, Wei Zheng, Tien-Yin Wong, Wei Huang, Bong-Jo Kim, E-Shyong Tai, Karen L Mohlke, Xueling Sim
Large-scale meta-analyses of genome-wide association studies (GWAS) have identified >175 loci associated with fasting cholesterol levels, including total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C), and triglycerides (TG). With differences in linkage disequilibrium (LD) structure and allele frequencies between ancestry groups, studies in additional large samples may detect new associations. We conducted staged GWAS meta-analyses in up to 69,414 East Asian individuals from 24 studies with participants from Japan, the Philippines, Korea, China, Singapore, and Taiwan...
February 21, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28334845/infantile-tremor-syndrome-and-subdural-hemorrhage-in-an-infant-with-cystic-fibrosis
#18
Anirban Mandal, Mayank Priyadarshi, Kanaram Jat, Sushil Kumar Kabra
Cystic fibrosis (CF), an autosomal recessive disease with multi-system involvement, may present with bleeding in infancy owing to vitamin K malabsorption. Infantile tremor syndrome (ITS) is an obscure condition associated with vitamin B12 and other micronutrient deficiencies, described predominantly in Indian subcontinent. We describe an infant presenting with ITS and chronic subdural hemorrhage. He was subsequently diagnosed to have CF. The ITS and subdural hemorrhage is rarely reported in children with CF...
February 23, 2017: Journal of Tropical Pediatrics
https://www.readbyqxmd.com/read/28334711/quantitative-proteomics-analysis-of-ischemia-reperfusion-injury-modulated-proteins-in-cardiac-microvascular-endothelial-cells-and-the-protective-role-of-tongxinluo
#19
Qing Li, He-He Cui, Yue-Jin Yang, Xiang-Dong Li, Gui-Hao Chen, Xia-Qiu Tian, Chen Jin, Qiu-Ting Dong, Pei-Sen Huang, Jun Xu
BACKGROUND: The protection of endothelial cells (ECs) against reperfusion injury has received little attention. In this study, we used Tandem Mass Tag (TMT) labeling proteomics to investigate the modulated proteins in an in vitro model of cardiac microvascular endothelial cells (CMECs) subjected to ischemia/reperfusion (I/R) injury and their alteration by traditional Chinese medicine Tongxinluo (TXL). METHODS: Human CMECs were subjected to 2 h of hypoxia followed by 2 h of reoxygenation with different concentrations of TXL Protein expression profiles of CMECs were determined using tandem mass spectrometry...
March 24, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28334700/single-agent-pixantrone-as-a-bridge-to-autologous-stem-cell-transplantation-in-a-patient-with-refractory-diffuse-large-b-cell-lymphoma
#20
Lorena Appio, Carlo Landoni, Maria La Targia, Vanda Bertolli, Martina Chiarucci, Giovanni Crovetti, Elisabetta Vassenna, Giovanni Serio, Marco Bregni
Aggressive non-Hodgkin lymphoma is associated with poor long-term survival after relapse or resistance to chemotherapy. We report a case of aggressive non-Hodgkin lymphoma refractory to first-line R-CHOP (rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone) and second-line R-DHAP (rituximab, dexamethasone, cytarabine, and cisplatin) chemotherapy treatments. The patient achieved remission with single-agent pixantrone, and received a consolidation with high-dose BEAM (BCNU, etoposide, cytarabine, and melphalan) chemotherapy and autologous stem cell transplantation...
March 24, 2017: Chemotherapy
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