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https://www.readbyqxmd.com/read/28629537/triterpenoid-saponins-from-the-roots-of-cyathula-officinalis-and-their-inhibitory-effects-on-nitric-oxide-production
#1
Yun-Tao Jiang, Wen-Jing Yan, Chu-Lu Qi, Ji-Qin Hou, Yan-Ying Zhong, Hui-Jun Li, Hao Wang, Ping Li
The present study was designed to investigate the chemical constituents of the roots of Cyathula officinalis. Compounds were isolated by silica gel, Sephadex LH-20, ODS column chromatography, and preparative HPLC. Their structures were determined on the basis of 1D and 2D NMR techniques, mass spectrometry, and chemical methods. One new oleanane-type triterpenoid saponin, 28-O-[α-L-rhamnopyranosyl-(1→3)-β-D-glucuronopyranosyl-(1→3)-β-D-glucopyranosyl] hederagenin (1), was isolated from the roots of Cyathula officinalis...
June 2017: Chinese Journal of Natural Medicines
https://www.readbyqxmd.com/read/28623867/a-validated-uhplc-ms-ms-method-for-the-measurement-of-riluzole-in-plasma-and-myocardial-tissue-samples
#2
Suzanne L Parker, Yarmarly C Guerra Valero, Jeffrey Lipman, Steven Weiss, Camilla Smith, Lyndal Russell, Paul Smith, Jason A Roberts, Steven C Wallis
Through blocking the cardiac persistent sodium current, riluzole has the potential to prevent myocardial damage post cardiac bypass surgery. A sensitive UHPLC-MS/MS method was developed and validated for quantitation of riluzole and 5-methoxypsoralen in human plasma and myocardial tissue homogenate using a liquid-liquid extraction with dichloromethane. The chromatographic separation was achieved using Shimadzu Shim-pack XR-ODS III, 2.0 x 50 mm, 1.6 μm column with a gradient mobile phase comprising of methanol and ammonium acetate buffer pH 3...
June 17, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28623864/a-highly-sensitive-lc-ms-ms-method-for-simultaneous-determination-of-glycyrrhizin-and-its-active-metabolite-glycyrrhetinic-acid-application-to-a-human-pharmacokinetic-study-after-oral-administration
#3
Tsuneharu Suzuki, Michiko Tsukahara, Yuko Akasaka, Hideo Inoue
A highly sensitive liquid chromatography tandem mass spectrometry (LC-MS/MS) method for simultaneous determination of glycyrrhizin (GL) and its active metabolite, glycyrrhetinic acid (GA) from human plasma was validated and applied to a human pharmacokinetic study. The analytes were extracted from human plasma using an Oasis MAX cartridge and chromatographic separation was performed on an Inertsil ODS-3 column. The detection was performed using an API 4000 mass spectrometer operating in the positive electrospray ionization mode...
June 17, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28620705/topical-bevacizumab-treatment-in-aniridia
#4
Ruth Lapid-Gortzak, Nathalie T Y Santana, Carla P Nieuwendaal, Maarten P Mourits, Ivanka J E van der Meulen
PURPOSE: To report the results of long-term topical treatment with bevacizumab (Avastin) 5 mg/mL eyedrops in a case of aniridia-related neovacularization of the cornea. METHODS: Interventional case report. A female patient with aniridia had a decrease in the best corrected visual acuity from 0.32 to 0.02 in the OS over the course of 4 years, secondary to central corneal neovascularization and epithelial breakdown. Vision in the OD was 0.2. In 2008, at age 28, a shared decision was made to start off-label treatment with bevacizumab eyedrops 0...
June 15, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28613841/estimating-a-representative-value-and-proportion-of-true-zeros-for-censored-analytical-data-with-applications-to-contaminated-site-assessment
#5
Claus P Haslauer, Jessica R Meyer, András Bárdossy, Beth L Parker
This paper demonstrates a maximum likelihood (ML)-based approach to derive representative ("best guess") contaminant concentrations from data with censored values (e.g., less than the detection limit). The method represents an advancement over existing techniques because it is capable of estimating the proportion of measurements that are true zeros and incorporating varying levels of censorship (e.g., sample specific detection limits, changes through time in method detection). The ability of the method to estimate the proportion of true zeros is validated using precipitation data...
June 23, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28600694/starr-with-contour-transtar-for-obstructed-defecation-syndrome-long-term-results
#6
Francesco Saverio Mari, Massimo Pezzatini, Marcello Gasparrini, Brescia Antonio
INTRODUCTION: Obstructed defecation syndrome (ODS) is a widespread and disabling syndrome. With this study, we want to evaluate the long-term results of stapled transanal rectal resection (STARR) performed with Contour Transtar device in the treatment for ODS. A re-evaluation of 113 patients subjected to STARR from June 2007 to January 2010 was conducted. METHODS: All the patients treated for symptomatic ODS with STARR with Contour Transtar were included in the study...
June 9, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28592800/paradoxical-puborectalis-syndrome-on-diffusion-weighted-imaging-a-retrospective-study-of-72-cases
#7
Guiqin Liu, Zhe Cui, Yongming Dai, Qiuying Yao, Jianrong Xu, Guangyu Wu
This study aimed to evaluate the application value of diffusion-weighted imaging (DWI) for assessing paradoxical puborectalis syndrome (PPS) in patients with obstructive defecation syndrome (ODS). The medical records of 72 ODS patients who underwent magnetic resonance (MR)-DWI and MR-defecography were retrospectively reviewed. The differences in the apparent diffusion coefficients (ADCs) and the thickness of the right and left branches of the puborectalis muscles between the PPS(+) and PPS(-) groups were compared...
June 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28580758/nuclei-specific-deposits-of-iron-and-calcium-in-the-rat-thalamus-after-status-epilepticus-revealed-with-quantitative-susceptibility-mapping-qsm
#8
Manisha Aggarwal, Xu Li, Olli Gröhn, Alejandra Sierra
PURPOSE: To investigate pathological changes in the rat brain after pilocarpine-induced status epilepticus using quantitative susceptibility mapping (QSM). MATERIALS AND METHODS: 3D multiecho gradient-echo (GRE) data were acquired from ex vivo brains of pilocarpine-injected and age-matched control rats at 11.7T. Maps of R2* and quantitative susceptibility were calculated from the acquired 3D GRE magnitude and phase data, respectively. QSM and R2* maps were compared with Perls' (iron) and Alizarin-red-S (calcium) stainings in the same brains to investigate the pathophysiological basis of susceptibility contrast...
June 5, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28577170/laparoscopic-ventral-mesh-rectopexy-for-obstructive-defecation-syndrome-still-the-way-to-go
#9
Stefan Riss, Joseph Winstanley, Mhairi Collie
Laparoscopic ventral mesh rectopexy (VMR) has become a popular surgical technique for treating women with full-thickness rectal prolapse with a low recurrence rate, as demonstrated by several studies. In addition, it is increasingly applied to female patients with obstructive defecation syndrome (ODS) caused by intussusception ± rectocele. Functional improvement can be achieved in a high number of patients with ODS, but expectations need to be discussed carefully, as a few patients may not benefit at all. In particular, long-term data on functional outcome and complications following laparoscopic VMR for ODS are still lacking in the literature...
June 2, 2017: International Urogynecology Journal
https://www.readbyqxmd.com/read/28572875/nerve-preserving-vs-standard-laparoscopic-sacropexy-postoperative-bowel-function
#10
Stefano Cosma, Paolo Petruzzelli, Saverio Danese, Chiara Benedetto
AIM: To compare our developed nerve preserving technique with the non-nerve preserving one in terms of de novo bowel symptoms. METHODS: Patients affected by symptomatic apical prolapse, admitted to our department and treated by nerve preserving laparoscopic sacropexy (LSP) between October, 2010 and April, 2013 (Group A or "interventional group") were compared to those treated with the standard LSP, between September, 2007 and December, 2009 (Group B or "control group")...
May 16, 2017: World Journal of Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28570935/pharmacokinetics-study-of-erhuang-decoction-extracts-in-rats-by-hplc-ms-ms
#11
Jinglong Wang, Dandan Zheng, Yingzi Wang, Chao Zhang, Xiumei Sun
To study the pharmacokinetics of Erhuang decoction extracts, a high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) method was established for the determination of effective substances in rat plasma. The extracts prepared by water extraction (WE) method were given to rats by oral administration. After collected from the orbital venous plexus, plasma was treated by protein precipitation method. Then, the concentration of index components, including baicalin, liquiritin, berberine, palmatine and glycyrrhetinic acid, were determined by HPLC-MS/MS...
August 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28550651/a-new-biphenyl-ether-derivative-produced-by-indonesian-ascidian-derived-penicillium-albobiverticillium
#12
Deiske A Sumilat, Hiroyuki Yamazaki, Kotaro Endo, Henki Rotinsulu, Defny S Wewengkang, Kazuyo Ukai, Michio Namikoshi
A new biphenyl ether derivative, 2-hydroxy-6-(2'-hydroxy-3'-hydroxymethyl-5-methylphenoxy)-benzoic acid (1), was isolated together with the known benzophenone derivative, monodictyphenone (2), from a culture broth of Indonesian ascidian-derived Penicillium albobiverticillium TPU1432 by solvent extraction, ODS column chromatography, and preparative HPLC (ODS). The structure of 1 was elucidated based on NMR experiments. Compound 2 exhibited moderate inhibitory activities against protein tyrosine phosphatase (PTP) 1B, T cell PTP (TCPTP), and CD45 tyrosine phosphatase (CD45), whereas compound 1 modestly inhibited CD45 activity...
May 26, 2017: Journal of Natural Medicines
https://www.readbyqxmd.com/read/28534327/-modified-stapled-transanal-rectal-resection-combined-with-perioperative-pelvic-floor-biofeedback-therapy-in-the-treatment-of-obstructed-defecation-syndrome
#13
Lei Chen, Fanqi Meng, Tongsen Zhang, Yinan Liu, Shuang Sha, Si Chen, Jiandong Tai
OBJECTIVE: To investigate the clinical efficacy and safety of modified stapled transanal rectal resection (STARR) combined with perioperative pelvic floor biofeedback therapy (POPFBFT) in treating obstructed defecation syndrome (ODS). METHODS: Thirty female ODS patients underwent modified STARR (resection and suture was performed in rectocele with one staple) combined with POPFBFT in Department of Colorectal and Anal Surgery, The First Hospital of Jilin university from October 2013 to March 2015...
May 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28524783/quantitative-analysis-of-veterinary-drugs-in-bovine-muscle-and-milk-by-liquid-chromatography-quadrupole-time-of-flight-mass-spectrometry
#14
Shizuka Saito-Shida, Takatoshi Sakai, Satoru Nemoto, Hiroshi Akiyama
A simple and reliable multiresidue method for quantitative determination of veterinary drugs in bovine muscle and milk using liquid chromatography quadrupole time-of-flight mass spectrometry (LC-QTOF-MS) was developed. Critical MS parameters such as capillary voltage, cone voltage, collision energy, desolvation gas temperature and extraction mass window were carefully optimised to obtain the best possible sensitivity. Analytical samples were prepared using extraction with acetonitrile and hexane in the presence of anhydrous sodium sulphate and acetic acid, followed by ODS cartridge clean-up...
June 20, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28509122/severe-hyponatremia-in-a-patient-with-schizophrenia-associated-with-prolonged-consciousness-disturbance
#15
Kunihiko Yasuda, Takatsugu Iwashita, Yosuke Tayama, Yuko Makino, Ayumu Watanabe, Tatsuro Sano, Taisuke Shimizu, Tomonari Ogawa, Koichi Kanozawa, Hajime Hasegawa
Hyponatremia presents with various central nervous system symptoms during its course and treatment. We treated a patient who presented with a prolonged consciousness disorder and was suspected of having complications of neuroleptic malignant syndrome and osmotic demyelination syndrome (ODS) during the treatment for his hyponatremia, which was caused by syndrome of inappropriate secretion of antidiuretic hormone (SIADH). The patient was a 30-year-old Japanese man who had been under treatment for schizophrenia...
May 2017: CEN Case Reports
https://www.readbyqxmd.com/read/28494973/retention-in-high-performance-liquid-chromatography-at-196%C3%A2-c
#16
Tomohiro Motono, Shinya Kitagawa, Hajime Ohtani
Recently, we have developed ultralow-temperature high-performance liquid chromatography (HPLC) at -196°C using liquid nitrogen-based mobile phases. In this study, a retention model for ultralow-temperature HPLC, in which adsorption exchange and "pseudo partition" modes are combined, is proposed to describe the effect of the mobile phase composition on the retention of analytes. The experimental results agreed well with the equation of the proposed model. It was revealed that, in the low and high additive concentration regions, adsorption exchange and pseudo partition retention, respectively, dominate the analyte retention...
June 23, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28485206/induced-accumulation-of-tyramine-serotonin-and-related-amines-in-response-to-bipolaris-sorokiniana-infection-in-barley
#17
Atsushi Ishihara, Rie Kumeda, Noriko Hayashi, Yukari Yagi, Nanase Sakaguchi, Yu Kokubo, Naoki Ube, Shin-Ichi Tebayashi, Kotomi Ueno
The inducible metabolites were analyzed in barley leaves inoculated with Bipolaris sorokiniana, the causal agent of spot blotch of barley. HPLC analysis revealed that B. sorokiniana-infected leaves accumulated 4 hydrophilic compounds. They were purified by ODS column chromatography and preparative HPLC. Spectroscopic analyses revealed that they were tyramine (1), 3-(2-aminoethyl)-3-hydroxyindolin-2-one (2), serotonin (3), and 5,5'-dihydroxy-2,4'-bitryptamine (4). Among these, 2 and 4 have not been reported as natural products...
June 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28479731/simultaneous-determination-of-multiple-ginsenosides-in-panax-ginseng-herbal-medicines-with-one-single-reference-standard
#18
Chunwei Wu, Qingxiao Guan, Shumei Wang, Yueying Rong
BACKGROUND: Root of Panax ginseng C. A. Mey (Renseng in Chinese) is a famous Traditional Chinese Medicine. Ginsenosides are the major bioactive components. However, the shortage and high cost of some ginsenoside reference standards make it is difficult for quality control of P. ginseng. OBJECTIVE: A method, single standard for determination of multicomponents (SSDMC), was developed for the simultaneous determination of nine ginsenosides in P. ginseng (ginsenoside Rg1, Re, Rf, Rg2, Rb1, Rc, Rb2, Rb3, Rd)...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28474187/idh-mutant-and-1p-19q-co-deleted-oligodendrogliomas-tumor-grade-stratification-using-diffusion-susceptibility-and-perfusion-weighted-mri
#19
Yu Lin, Zhen Xing, Dejun She, Xiefeng Yang, Yingyan Zheng, Zebin Xiao, Xingfu Wang, Dairong Cao
PURPOSE: Currently, isocitrate dehydrogenase (IDH) mutation and 1p/19q co-deletion are proven diagnostic biomarkers for both grade II and III oligodendrogliomas (ODs). Non-invasive diffusion-weighted imaging (DWI), susceptibility-weighted imaging (SWI), and dynamic susceptibility contrast perfusion-weighted imaging (DSC-PWI) are widely used to provide physiological information (cellularity, hemorrhage, calcifications, and angiogenesis) of neoplastic histology and tumor grade. However, it is unclear whether DWI, SWI, and DSC-PWI are able to stratify grades of IDH-mutant and 1p/19q co-deleted ODs...
June 2017: Neuroradiology
https://www.readbyqxmd.com/read/28459142/orgasmic-dysfunction-after-radical-prostatectomy
#20
REVIEW
Paolo Capogrosso, Eugenio Ventimiglia, Walter Cazzaniga, Francesco Montorsi, Andrea Salonia
In addition to urinary incontinence and erectile dysfunction, several other impairments of sexual function potentially occurring after radical prostatectomy (RP) have been described; as a whole, these less frequently assessed disorders are referred to as neglected side effects. In particular, orgasmic dysfunctions (ODs) have been reported in a non-negligible number of cases, with detrimental impacts on patients' overall sexual life. This review aimed to comprehensively discuss the prevalence and physiopathology of post-RP ODs, as well as potential treatment options...
April 2017: World Journal of Men's Health
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