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https://www.readbyqxmd.com/read/28936845/-chemical-constituents-from-pteris-multifida-and-cytotoxic-activity
#1
Yan Zhang, Yu-Sheng Shi, Wen-Zhong Hu, Li-Yan Song, Xiao-Zhong Chen
The materials were extracted by 95% ethanol, and the extracting solution was isolated by kinds of chromatographic columns including polyamide, MCI, preparative MPLC, and preparative HPLC. Eight diterpenes and two sesquiterpenes were isolated from the plant. On analysis of ESI-MS and NMR spectroscopic data, the structures were established as ent-3β-hydroxy-kaur-16-en-19-al (1), 4-epi-kaurenic acid (2), mitrekaurenone (3), 7β,16α,17-trihydroxy-ent-kauran-19-oic acid (4), crotonkinin E (5), crotonkinin F (6), pterisolic acid A (7), pterisolic acid C (8), (2R)-pterosin P (9), and dehydropterosin B (10)...
December 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28935182/eudesmane-sesquiterpenes-from-chinese-liverwort-are-substrates-of-cdrs-and-display-antifungal-activity-by-targeting-erg6-and-erg11-of-candida-albicans
#2
Siwen Li, Hongzhuo Shi, Wenqiang Chang, Yi Li, Ming Zhang, Yanan Qiao, Hongxiang Lou
We isolated twelve sesquiterpenes from Chinese liverwort Tritomaria quinquedentata (Huds.) Buch., including four new compounds. Among them, five eudesmane sesquiterpenes were ineffective against Candida albicans wild strain SC5314 but active towards efflux pumps-deficient strain DSY654 using Alamar blue assay. Further test of the most active agent of ent-isoalantolactone (8, ent-iLL) showed that it also inhibited the yeast-to-hyphal switch of DSY654 cells. The intracellular content measurement using high performance liquid chromatography (HPLC) revealed that ent-iLL was intracellularly accumulated in C...
September 9, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28931197/study-of-factors-responsible-for-recidivism-in-allergic-fungal-rhinosinusitis
#3
Bipin Kishore Prasad
Patients with allergic fungal rhinosinusitis (AFRS) are typically atopic and immunocompetent. Despite combined modality treatment based on surgery and immunomodulation, the potential for recidivism is well recognized. A study was conducted in a military hospital in India to identify the factors responsible for recidivism in AFRS and to suggest measures to overcome it. Sixty patients with AFRS (42 new cases and 18 cases that required revision surgery) were managed between January 2009 and July 2013. Patients underwent endoscopic, radiologic, and laboratory evaluation for AFRS followed by functional endoscopic sinus surgery...
September 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/28929061/drug-induced-sleep-endoscopy-as-a-selection-tool-for-surgical-management-of-obstructive-sleep-apnoea-syndrome-our-personal-experience
#4
M B Bharathi, J Rajendra Prasad, K Satish
The role of Drug-induced sleep endoscopy as a selection tool for surgical management of obstructive sleep apnoea syndrome. SOURCE OF DATA: Polysomnography proved OSA patients, who are planned for surgery in dept. of ENT AND HEAD& NECK, JSS Hospital, Mysore. STUDY DESIGN: A prospective clinical study. METHOD: 30 Polysomnography proved OSA patients, age between 20 and 60 years have been selected for Drug Induced Sleep Endoscopy (DISE) after taking informed consent for proposed surgery...
September 2017: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/28928490/the-application-of-volumometry-as-an-indication-criterion-in-blow-out-fractures-the-first-results-from-a-prospective-study
#5
Daniel Kovar, Richard Holy, Zdenek Voldrich, Pavel Voska, Jan Lestak, Jaromir Astl
Backgroung and Aim. This work builds on our publication on the subject of creating a mathematical model for calculating the volume of proplaped soft tissue of the orbit in blow-out fractures, which aids us greatly in our choice of the most effective treatment immediately post-accident. PATIENTS AND METHODS: In this prospective study (2014 - 2016) we treated 29 patients with blow-out fractures. 18 (62%) were treated conservatively and in 11 (38%) we proceeded surgically. We decided whether surgical or non-surgical therapy was appropriate on the basis of clinical ENT, eye examination and the total volume of prolapsed orbital soft tissue...
August 31, 2017: Biomedical Papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia
https://www.readbyqxmd.com/read/28928264/role-of-ultrasound-biomicroscopy-in-diagnosis-of-ocular-toxocariasis
#6
Qian Chen, Junxiang Gu, Rui Jiang, Min Zhou, Qing Chang
PURPOSE: To investigate ultrasound biomicroscopy (UBM) characteristics of patients with ocular toxocariasis (OT) and to explore the role of UBM in the diagnosis and differential diagnosis of OT. DESIGN: Cross-sectional study. METHODS: 78 eyes of 77 patients clinically consistent with OT and confirmed by serum and/or intraocular antibodies in a single tertiary centre (Fudan University Eye and ENT Hospital, Shanghai) between July 2009 and July 2016 were included in the study...
September 19, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28918196/expression-and-purification-of-human-and-saccharomyces-cerevisiae-equilibrative-nucleoside-transporters
#7
Rebba C Boswell-Casteel, Jennifer M Johnson, Zygy Roe-Žurž, Kelli D Duggan, Hannah Schmitz, Franklin A Hays
Nucleosides play an essential role in the physiology of eukaryotes by acting as metabolic precursors in de novo nucleic acid synthesis and energy metabolism. Nucleosides also act as ligands for purinergic receptors. Equilibrative nucleoside transporters (ENTs) are polytopic integral membrane proteins that aid in regulating plasmalemmal flux of purine and pyrimidine nucleosides and nucleobases. ENTs exhibit broad substrate selectivity across different isoforms and utilize diverse mechanisms to drive substrate flux across membranes...
September 13, 2017: Protein Expression and Purification
https://www.readbyqxmd.com/read/28914375/central-nervous-system-involvement-in-patients-with-granulomatosis-with-polyangiitis-a-single-center-retrospective-study
#8
George E Fragoulis, Sophia Lionaki, Aliki Venetsanopoulou, Panayiotis G Vlachoyiannopoulos, Haralampos M Moutsopoulos, Athanasios G Tzioufas
The aims of this study were to estimate the frequency of central nervous system (CNS) involvement in Greek patients with granulomatosis with polyangiitis (GPA) and describe the related clinical characteristics and long-term outcomes of these patients. Medical charts of all ANCA-associated vasculitis patients were retrospectively reviewed, and GPA patients with CNS involvement were identified. Demographics, serological, and clinical features throughout the disease course were recorded. Comparisons of disease characteristics and long-term outcomes were performed between GPA patients with and without CNS involvement...
September 15, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28904655/assessment-of-potentially-preventable-hospitalizations-in-the-regional-hospital-of-saint-louis-senegal
#9
Abdoul Aziz Ndiaye, Mouhameth Bakhoum, Alioune Badara Tall, Ndeye Fatou Ngom-Gueye, Mohamed Sidy Seck, Boubacar Gueye, Awa Diop-Ba, Awa Gaye, Gallo Papa Sow, Lamine Gueye, Anta Tal-Dia
INTRODUCTION: The "potentially preventable hospitalizations (PPH)'' are hospital admissions that could have been avoided through effective primary care given at the appropriate time. Non-communicable diseases (NCDs), causes of PPH, are the leading cause of death worldwide with significant socioeconomic consequences especially in developing countries. This study aimed to assess the burden of potentially preventable hospitalizations in the St. Louis regional hospital. METHODS: This was a descriptive cross-sectional study...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28904584/central-nervous-system-inflammatory-myofibroblastic-tumor-masquerading-as-chronic-suppurative-otitis-media
#10
Namit Singhal, Vinay Agarwal, Anu Chawla, Rajiv Tangri
Inflammatory myofibroblastic tumor (IMT) is a rare tumor in the central nervous system (CNS), mostly being extracranial. Approximately 100 sporadic cases have been reported in the literature. The rarity of the tumor, its various histopathological characteristics, and its variable aggressive course render it difficult to diagnose and treat. IMT is generally a histological diagnosis which is rarely suspected preoperatively. It mimics other intracranial tumors such as giant cell tumor, hemangiopericytoma, anaplastic meningioma, plasmacytoma, and lymphoma...
April 2017: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/28901767/6-7-seco-ent-kauranoids-derived-from-oridonin-as-potential-anticancer-agents
#11
Shengtao Xu, Hong Yao, Mei Hu, Dahong Li, Zheying Zhu, Weijia Xie, Hequan Yao, Liang Wu, Zhe-Sheng Chen, Jinyi Xu
Structurally unique 6,7-seco-ent-kaurenes, which are widely distributed in the genus Isodon, have attracted considerable attention because of their antitumor activities. Previously, a convenient conversion of commercially available oridonin (1) to 6,7-seco-ent-kaurenes was developed. Herein, several novel spiro-lactone-type ent-kaurene derivatives bearing various substituents at the C-1 and C-14 positions were further designed and synthesized from the natural product oridonin. Moreover, a number of seven-membered C-ring-expanded 6,7-seco-ent-kaurenes were also identified for the first time...
September 13, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28900652/-medical-examination-preparation-for-ent-specialisation-part%C3%A2-32
#12
Thomas Eichhorn
No abstract text is available yet for this article.
September 12, 2017: HNO
https://www.readbyqxmd.com/read/28895443/cytotoxic-8-9-seco-ent-kaurane-diterpenoids-from-croton-kongensis
#13
Shu-Qin Shi, Yao-Yue Fan, Cheng-Hui Xu, Jian Ding, Guan-Wu Wang, Jian-Min Yue
Chemical study on the ethanolic extract generated from the aerial parts of Croton kongensis led to the isolation of three new 8,9-seco-ent-kaurane diterpenoids, kongeniods A‒C (1‒3), together with seven known analogs (4-10). The structures of these compounds were assigned by spectroscopic data analysis. The vitro cytotoxic tests showed that compounds 1-3 exhibited strong activities against HL-60 cell lines with IC50 values of 0.47, 0.58, and 1.27 μM, respectively.
September 12, 2017: Journal of Asian Natural Products Research
https://www.readbyqxmd.com/read/28892943/reconstruction-of-maxilla-with-titanium-mesh-and-fascia-lata-a-case-report
#14
Devkumar Rengaraja, Mohan Jagade, Karthik Rao, Radhika Sonate, Arpita Singhal
Maxillary defect reconstruction has been a grave challenge which unfortunately has stopped many ENT surgeons from attempting maxillectomy due to the fear of reconstruction. With our technique of reconstructing the maxillary defect with titanium mesh and fascia lata, the need for microvascular assistance is obviated. Here we describe a revision case of ameloblastoma of maxilla in a 33-year-old female for which total maxillectomy with reconstruction was done without the aid of microvascular tissue transfer. The aim of this article is to encourage and alleviate the fear among the ENT surgeons, in attempting maxillectomy and its reconstruction for delivering an equally good aesthetic and functional outcome especially at the centres where the facility of plastic assistance is not readily available...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28892941/cartilage-myringoplasty-an-ideal-grafting-technique-for-complex-perforations
#15
Munish Kambatatti Shekharappa, Shruthi Malavalli Siddappa
INTRODUCTION: Tympanoplasty is one of routinely performed surgeries in ENT practice. Using cartilage-perichondrium composite graft in selective cases gives better outcome. AIM: To study the outcome and feasibility of cartilage-perichondrium composite graft in repair of complex tympanic membrane perforations. MATERIALS AND METHODS: This cross-sectional, intervention study was conducted at SSIMS and RC, Tertiary Care Teaching Hospital, Davangere, Karnataka, Southern India...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28891321/two-new-ent-kaurane-diterpenes-from-the-stems-of-eurya-chinensis
#16
Jia-Ling Song, Yao Yuan, Ling-Hui Nie, Bai-Lin Li, Xu-Bing Qin, Yan Li, Jie-Wei Wu, Sheng-Xiang Qiu
Two new ent-kaurane diterpenes (1-2), together with five known analogs, were isolated from the stems of Eurya chinensis. The structures of new compounds were established by extensive analysis of mass spectrometric and 1D and 2D NMR spectroscopic data. Compound 3 exhibited noticeable anti-inflammatory activity as denoted by inhibiting LPS-induced nitric oxide (NO) production in RAW264.7 cells with an IC50 value of 7.82 μM. Compound 4 showed potent cytotoxic activity against human cancer cell lines NCI-H46, HepG2 and SW480 with IC50 values ranging from 7...
September 11, 2017: Journal of Asian Natural Products Research
https://www.readbyqxmd.com/read/28885586/senna-singueana-antioxidant-hepatoprotective-antiapoptotic-properties-and-phytochemical-profiling-of-a-methanol-bark-extract
#17
Mansour Sobeh, Mona F Mahmoud, Rehab A Hasan, Haroan Cheng, Assem M El-Shazly, Michael Wink
Natural products are considered as an important source for the discovery of new drugs to treat aging-related degenerative diseases and liver injury. The present study profiled the chemical constituents of a methanol extract from Senna singueana bark using HPLC-PDA-ESI-MS/MS and 36 secondary metabolites were identified. Proanthocyanidins dominated the extract. Monomers, dimers, trimers of (epi)catechin, (epi)gallocatechin, (epi)guibourtinidol, (ent)cassiaflavan, and (epi)afzelechin represented the major constituents...
September 8, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28877768/are-questionnaires-reliable-in-diagnosing-sleep-disordered-breathing-in-university-students
#18
E Migacz, A Wichniak, W Kukwa
OBJECTIVE: This study aimed to screen young adults for sleep-disordered breathing, and compare those with high and low risk for sleep-disordered breathing. METHODS: A survey based on the Berlin questionnaire was completed by 330 university students, and the results were used to divide them into sleep-disordered breathing positive and sleep-disordered breathing negative groups. A representative group was selected from each cohort (positive group, n = 16; negative group, n = 21), and assessed with sleep study, ENT examination, the Nose Obstruction Symptom Evaluation scale, and the Epworth Sleepiness Scale...
September 7, 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28876567/a-review-of-presentations-to-the-surgical-research-society-of-southern-africa-and-the-association-of-surgeons-of-south-africa-from-2010-to-2016
#19
S Burger, S van Straten, S Rayne
This paper looks at research done in South Africa from 2010 to 2016. We reviewed a total of 679 abstracts, posters and oral presentations submitted to the SAJS and the ASSA congresses during this time. During this time 21945 patients were investigated with an average of 577,5 patients per study. Each paper had on average 3,5 authors. The most popular topics are trauma (23%), gastrointestinal surgery (18%) and breast (11%). Upcoming topics include: reducing sepsis, global surgery, procedural discussion, infectious diseases (HIV/ TB), post-operative healing, ENT, neuro, plastic surgery, cardiothoracic and paediatric surgery...
September 2017: South African Journal of Surgery. Suid-Afrikaanse Tydskrif Vir Chirurgie
https://www.readbyqxmd.com/read/28875852/molecular-modeling-studies-of-novel-fluoroquinolone-molecules
#20
Naresh Kumar Katari, Tejeswara Rao Allaka, Venkataramireddy Veeramreddy, Jaya Shree Anireddy
BACKGROUND: Fluoroquinolones have been the centre of considerable scientific and clinical interest due to their broad spectrum pharmacological activities. Pefloxacin is an analogue of norfloxacin, which is a 3rd generation of fluoroquinolone [5] antibiotic similar to ciprofloxacin. Pefloxacin is used to treat a variety of bacterial infections like respiratory tract, ear, nose and throat (ENT) infections, skin infections, urinary tract infections. Hydrazone as a pharmacophore unit that attract the medicinal chemists because of structure activity relationship (SAR) studies of fluoroquinolones especially the functionality at C-3 position...
August 29, 2017: Current Drug Discovery Technologies
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