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https://www.readbyqxmd.com/read/28813096/cytotoxicity-and-bacterial-membrane-destabilization-induced-by-annona-squamosa-l-extracts
#1
Nícolas C C Pinto, Jucélia B Silva, Laura M Menegati, Maria Clara M R Guedes, Lucas B Marques, Thiago P DA Silva, Rossana C N DE Melo, Elaine M DE Souza-Fagundes, Marcos J Salvador, Elita Scio, Rodrigo L Fabri
This study aimed to further investigate the cytotoxicity against tumor cell lines and several bacterial strains of Annona squamosa and its mode of action. Methanol extracts of A. squamosa leaves (ASL) and seeds (ASS) were used. ASL showed significant antibacterial activity against S. aureus, K. pneumoniae and E. faecalis with MIC values of 78, 78 and 39 µg/mL respectively. Moreover, ASL exhibited significant biofilm disruption, rapid time dependent kinetics of bacterial killing, increased membrane permeability and significantly reduced the cell numbers and viability...
August 14, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28811113/acrylamide-forming-potential-of-cereals-legumes-and-roots-and-tubers-analyzed-by-uplc-uv
#2
Y J H Galani, N J Patel, J G Talati
For directing scientists, consumers, industry and stakeholders on mitigation strategies, there is a need to understand the acrylamide-forming potential of important Indian foods. Flour obtained from total 16 varieties of 9 Indian cereals, legumes and roots and tubers was heated at 160 °C for 20 min, acrylamide was extracted and quantified by UPLC-UV. Acrylamide level was above the European Commission indicative value in potato- and cereal-based food products, it ranged from 3436.13 to 5562.56 μg/kg in roots and tubers (potato and sweet potato)...
August 12, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28809433/pharmacokinetic-and-ocular-microdialysis-study-of-oral-ginkgo-biloba-extract-in-rabbits-by-uplc-ms-ms-determination
#3
Shuya Wang, Ding Li, Jiaxin Pi, Wen Li, Bing Zhang, Dongli Qi, Nan Li, Pan Guo, Zhidong Liu
OBJECTIVES: The purpose of this work was to determine and investigate the absorption of ginkgo terpenoids (GT) in plasma and aqueous humour after oral administration of ginkgo biloba extract (GBE) by UPLC-MS/MS method. METHODS: The UPLC-MS/MS determination of GT employed the multiple reaction monitoring mode using an electrospray negative ionization. The rabbits were orally administered the suspension of GBE at a dose of 500 mg/kg. Serial plasma and dialysate samples were collected at the corresponding time and then analysed by UPLC-MS/MS...
August 15, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28808600/simultaneous-determination-of-11-compounds-in-gualou-guizhi-granule-and-pharmacokinetics-study-by-uplc-ms-ms
#4
Chengtao Sun, Wen Xu, Yuqin Zhang, Lishuang Yu, Miao Ye, Kedan Chu, Wei Xu, Yu Lin
A rapid and sensitive ultrafast performance liquid chromatography-tandem mass spectrometry method (UPLC-MS/MS) was developed for the simultaneous determination of 11 compounds in Gualou Guizhi Granule (GLGZG), including liquiritin, isoliquiritin, liquirtin apioside, isoliquiritin apioside, liquiritigenin, isoliquiritigenin, glycyrrhizic acid, glycyrrhetinic acid, paeoniflorin, albiflorin, and paeoniflorin sulfonate in rat plasma. UPLC-MS/MS assay with negative ion mode was performed on a Waters CORTECS C18 (2...
2017: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/28808376/isolation-of-abscisic-acid-from-korean-acacia-honey-with-anti-helicobacter-pylori-activity
#5
SeGun Kim, InPyo Hong, SoonOk Woo, HyeRi Jang, SokCheon Pak, SangMi Han
BACKGROUND: Helicobacter pylori (H. pylori) is linked to the development of the majority of peptic ulcers and some types of gastric cancers, and its antibiotic resistance is currently found worldwide. OBJECTIVE: This study is aimed at evaluating the anti-H. pylori activity of Korean acacia honey and isolating the related active components using organic solvents. MATERIAL AND METHODS: The crude acacia honey was extracted with n-hexane, dichloromethane, ethyl acetate (EtOAc), and n-butanol...
July 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28807090/mass-spectral-characterization-and-uplc-quantitation-of-3-deoxyanthocyanidins-in-sorghum-bicolor-varietals
#6
Nathan P Stern, Jatinder Rana, Amitabh Chandra, John Balles
A quantitative ultra-performance LC (UPLC) method was developed and validated to successfully separate, identify, and quantitate the major polyphenolic compounds present in different varieties of sorghum (Sorghum bicolor) feedstock. The method was linear from 3.2 to 320 ppm, with an r² of 0.99999 when using luteolinidin chloride as the external standard. Method accuracy was determined to be 99.5%, and precision of replicate preparations was less than 1% RSD. Characterization by UPLC-MS determined that the predominant polyphenolic components of the sorghum varietals were 3-deoxyanthocyanidins (3-DXAs)...
August 10, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28806569/metabolic-profiling-of-dehydrodiisoeugenol-using-xenobiotic-metabolomics
#7
Qian-Qian Lv, Xiao-Nan Yang, Dong-Mei Yan, Wei-Qing Liang, Hong-Ning Liu, Xiu-Wei Yang, Fei Li
Dehydrodiisoeugenol (DDIE), a representative and major benzofuran-type neolignan in Myristica fragrans Houtt., shows anti-inflammatory and anti-bacterial actions. In order to better understand its pharmacological properties, xenobiotic metabolomics was used to determine the metabolic map of DDIE and its influence on endogenous metabolites. Total thirteen metabolites of DDIE were identified through in vivo and in vitro metabolism, and seven of them were reported for the first time in the present study. The identity of DDIE metabolites was achieved by comparison of the MS/MS fragmentation pattern with DDIE using ultra-performance chromatography electrospray ionization quadrupole time-of-flight mass spectrometry (UPLC-ESI- QTOFMS)...
July 31, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28802242/an-lc-ms-ms-method-for-simultaneous-determination-of-nine-steroidal-saponins-from-paris-polyphylla-var-in-rat-plasma-and-its-application-to-pharmacokinetic-study
#8
Guangyi Yang, Wei Lu, Meng Pan, Chenning Zhang, Yuan Zhou, Pei Hu, Ming Hu, Gao Song
Paris polyphylla var is an herbal plant herb widely used in Traditional Chinese Medicine. The purpose of this study is to develop an Ultra Performance Liquid Chromatography-tandem mass spectrometer (UPLC-MS) method to quantify the major components (i.e., nine saponins) from P. polyphylla in plasma samples. A UItra BiPh column (100×2.1mm, 5μm) was used with acetonitrile/0.1% formic acid in water as mobile phases. The analytes were quantified using a Waters XEVO TQ mass spectrometer via multiple reaction monitoring (MRM) with positive scan mode...
August 1, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28802227/anti-inflammatory-effects-of-shufengjiedu-capsule-for-upper-respiratory-infection-via-the-erk-pathway
#9
Yanmei Li, Nianwei Chang, Yanqi Han, Mengge Zhou, Jie Gao, Yuanyuan Hou, Min Jiang, Tiejun Zhang, Gang Bai
BACKGROUND: Shufengjiedu Capsule (SFJD) is a type of Chinese traditional medicine compound for the treatment of acute upper respiratory tract infection. The present work aims to decipher the mechanism of SFJD. METHODS: In this study, we used target prediction and RNA sequence (RNA-Seq) based on transcriptome analysis to clarify the inflammation-eliminating mechanism of SFJD. Firstly, Pseudomonas aeruginosa (PAK) was used to induce acute lung injury in KM mice. After being treated by SFJD, the differently expressed genes were analyzed by RNA-Seq...
August 9, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28802217/comparatively-evaluating-the-pharmacokinetic-of-fifteen-constituents-in-normal-and-blood-deficiency-rats-after-oral-administration-of-xin-sheng-hua-granule-by-uplc-ms-ms
#10
Han-Qing Pang, Yu-Ping Tang, Yu-Jie Cao, Ya-Jie Tan, Yi Jin, Xu-Qin Shi, Sheng-Liang Huang, Da-Zheng Sun, Jin Sun, Zhi-Shu Tang, Jin-Ao Duan
Xin-Sheng-Hua Granule (XSHG), a famous traditional Chinese medicine prescription, are clinically applied for the treatment of postpartum disease through nourishing blood and promoting blood circulation. In this investigation, a multi-constituents (trigonelline, stachydrine hydrochloride, hydroxysafflor yellow A, chlorogenic acid, amygdalin, leonurine, liquiritin, ferulic acid, senkyunolide I, senkyunolide H, glycyrrhizic acid, senkyunolide A, ligustilide, butylidenephthalide and glycyrrhetinic acid) pharmacokinetic study of XSHG was conducted for the first time...
July 30, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28801775/plasticizers-and-bisphenol-a-in-packaged-foods-sold-in-the-tunisian-markets-study-of-their-acute-in-vivo-toxicity-and-their-environmental-fate
#11
Asma Beltifa, Anouar Feriani, Monia Machreki, Asma Ghorbel, Lakhdar Ghazouani, Giuseppa Di Bella, Joris Van Loco, Tim Reyns, Hedi Ben Mansour
Today, processed and packaged foods are considered as among the major sources of human exposure to plasticizers and bisphenol which migrate from plastic packing. In the present study, a wide range of food products sold on the Tunisian market such as grain and grain products, milk and dairy products, fats and oil, drink, fish, and sweets have been analyzed firstly in order to identify the presence of phthalates and bisphenol. Then, the identified chemical molecules were studied for their environmental fate and tested in vivo for its toxicity in mice models...
August 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28800704/qualitative-and-quantitative-analysis-of-carbohydrate-modification-on-glycoproteins-from-seeds-of-ginkgo-biloba
#12
Ting Wang, Xiao-Chun Hu, Zhi-Peng Cai, Josef Voglmeir, Li Liu
Recent progress in the relationship between carbohydrate cross-reactive determinants (CCDs) and allergic response highlights the importance of carbohydrate moieties in innate immune system. A previous research pointed out that the protein allergen in Ginkgo biloba seeds are glycosylated and the oligosaccharides conjugated to these proteins might also contribute to the allergy. The aim of this study was to analyze carbohydrate moieties, especially the N-linked glycans, of glycoproteins from Ginkgo seeds originated from different places for detailed structures, to enable further research on the roles that N-glycans play in Ginkgo-caused allergy...
August 11, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28800538/characterization-of-the-metabolic-transformation-of-thiamethoxam-to-clothianidin-in-helicoverpa-armigera-larvae-by-spe-combined-uplc-ms-ms-and-its-relationship-with-the-toxicity-of-thiamethoxam-to-helicoverpa-armigera-larvae
#13
Yinjun Fan, Xueyan Shi
In order to characterize the metabolic transformation of thiamethoxam (TMX) to clothianidin (CLO) in Helicoverpa armigera larvae and clarify its relationship with the insecticidal toxicity of TMX, method for determination of TMX and its metabolite clothianidin (CLO) residues in H. armigera larvae by solid phase extraction (SPE) combined UPLC-MS/MS was established. Following acetonitrile extraction and purification by SPE on florisil cartridge and C18 cartridge sequently, and cleanup by PSA adsorption, TMX and CLO residues in H...
July 31, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28800523/quantification-of-cyclocreatine-in-mouse-and-rat-plasma-using-hydrophilic-interaction-ultra-performance-liquid-chromatography-tandem-mass-spectrometry
#14
Amy Q Wang, Emma Hughes, Wenwei Huang, Edward H Kerns, Xin Xu
An accurate, rapid and selective method was developed to quantify cyclocreatine in mouse and rat plasma using hydrophilic interaction (HILIC) ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). The plasma samples were prepared by protein precipitation with acetonitrile:methanol (70:30). Chromatographic separation was performed on a HILIC BEH amide column (2.1mm×50mm, 1.7μm) with a 3min gradient elution at a flow rate of 0.5mL/min. For mass spectrometric detection, selected reaction monitoring (SRM) was used; the SRM transitions were m/z 144→98 and m/z 144→56 for cyclocreatine and m/z 148→102 for the internal standard (D4-cyclocreatine) in the positive ionization mode...
July 31, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28800124/uplc-qtof-ms-identification-of-the-chemical-constituents-in-rat-plasma-and-urine-after-oral-administration-of-rubia-cordifolia-l-extract
#15
Zuoliang Zheng, Shengqing Li, Yuping Zhong, Ruoting Zhan, Yan Yan, Huafeng Pan, Ping Yan
An effective ultra-performance liquid chromatography coupled with the quadrupole time-of-flight tandem mass spectrometry (UPLC/Q-TOF/MS) method was developed for analysing the chemical constituents in rat plasma and urine after the oral administration of Rubia cordifolia L. extract. Under the optimized conditions, nine of 11 prototypes in rat plasma and four prototypes in urine were identified or characterized by comparing the retention time, accurate mass, fragmentation patterns, reference compounds, and literature data...
August 11, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28798136/adipose-tissue-metabolic-and-inflammatory-responses-to-stroke-are-altered-in-obese-mice
#16
Michael J Haley, Graham Mullard, Katherine A Hollywood, Garth J Cooper, Warwick B Dunn, Catherine B Lawrence
Obesity is an independent risk factor for stroke, though several clinical studies have reported that obesity improves stroke outcome. Obesity is hypothesised to aid recovery by protecting against post-stroke catabolism. We therefore assessed whether obese mice had an altered metabolic and inflammatory response to stroke. Obese ob/ob mice underwent 20 min middle cerebral artery occlusion and 24 h reperfusion. Lipid metabolism and expression of inflammatory cytokines were assessed in the plasma, liver and adipose tissue...
August 10, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28797771/biphenyloxy-alkyl-piperidine-and-azepane-derivatives-as-histamine-h3-receptor-ligands
#17
Dorota Łażewska, Maria Kaleta, J Stephan Schwed, Tadeusz Karcz, Szczepan Mogilski, Gniewomir Latacz, Agnieszka Olejarz, Agata Siwek, Monika Kubacka, Annamaria Lubelska, Ewelina Honkisz, Jadwiga Handzlik, Barbara Filipek, Holger Stark, Katarzyna Kieć-Kononowicz
Novel biphenyloxy-alkyl derivatives of piperidine and azepane were synthesized and evaluated for their binding properties at the human histamine H3 receptor. Two series of compounds were obtained with a meta- and a para-biphenyl moiety. The alkyl chain spacer contained five and six carbon atoms. The highest affinity among all compounds was shown by 1-(6-(3-phenylphenoxy)hexyl)azepane (13) with a Ki value of 18nM. Two para-biphenyl derivatives, 1-(5-(4-phenylphenoxy)pentyl)piperidine (14; Ki=25nM) and 1-(5-(4-phenylphenoxy)pentyl)azepane (16; Ki=34nM), classified as antagonists in a cAMP accumulation assay (IC50=4 and 9nM, respectively), were studied in detail...
July 29, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28796310/turmeric-extract-rescues-ethanol-induced-developmental-defect-in-the-zebrafish-model-for-fetal-alcohol-spectrum-disorder-fasd
#18
Pooja Muralidharan, Craig T Connors, Arooj S Mohammed, Swapnalee Sarmah, Kathleen Marrs, James A Marrs, Grady W Chism
Prenatal ethanol exposure causes the most frequent preventable birth disorder, fetal alcohol spectrum disorder (FASD). The effect of turmeric extracts in rescuing an ethanol-induced developmental defect using zebrafish as a model was determined. Ethanol-induced oxidative stress is one of the major mechanisms underlying FASD. We hypothesize that antioxidant inducing properties of turmeric may alleviate ethanol-induced defects. Curcuminoid content of the turmeric powder extract (5 mg/mL turmeric in ethanol) was determined by UPLC and found to contain Curcumin (124...
August 10, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28793175/identification-of-the-constituents-and-metabolites-in-rats-after-oral-administration-of-zi-shen-formula-by-uplc-q-tof-ms-combined-pattern-recognition-analysis
#19
Yanchao Zheng, Yidan Zhang, Shihan Geng, Mengxi Xu, Qingshen Yin, Lili Song, Pengwei Zhuang, Yanjun Zhang
An ultra high-performance liquid chromatography mass spectrometry method was established to detect and identify the chemical constituents of Zi Shen Formula (ZSF) and its metabolites in serum, urine and feces, after oral administration into rats. A total of 68 compounds were characterized in ZSF extracts. In vivo, 38 prototype components and 32 metabolites of ZSF were tentatively identified in rat serum, urine and feces. 7 metabolic pathways including demethylation, hydroxylation, oxidation, sulfation, glucuronidation, methylation, de-caffeoyl were proposed to involve in the generation of these metabolites...
August 9, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28791806/ultra-high-performance-liquid-chromatography-coupled-with-electrospray-ionization-quadrupole-time-of-flight-mass-spectrometry-for-the-rapid-analysis-of-constituents-in-the-traditional-chinese-medicine-formula-wu-ji-bai-feng-pill
#20
Shengnan Duan, Wen Qi, Siwen Zhang, Kunkun Huang, Dan Yuan
An ultra high performance liquid chromatography coupled with electrospray ionization quadrupole time-of-flight mass spectrometry method in both positive and negative ion modes was established in order to comprehensively investigate the major constituents in Wu-Ji-Bai-Feng-Pill. Briefly, a Waters ACQUITY UPLC HSS C18 column was used to separate the aqueous extract of Wu-Ji-Bai-Feng-Pill. 0.1% formic acid in acetonitrile and 0.1% aqueous formic acid v/v were used as the mobile phase. All analytes were determined using quadrupole time-of-flight mass spectrometry with electrospray ionization source in positive and negative ion modes...
August 9, 2017: Journal of Separation Science
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