Read by QxMD icon Read


Jamie M Schiffer, Victoria A Feher, Robert D Malmstrom, Roxana Sida, Rommie E Amaro
Proteins commonly sample a number of conformational states to carry out their biological function, often requiring transitions from the ground state to higher-energy states. Characterizing the mechanisms that guide these transitions at the atomic level promises to impact our understanding of functional protein dynamics and energy landscapes. The leucine-99-to-alanine (L99A) mutant of T4 lysozyme is a model system that has an experimentally well characterized excited sparsely populated state as well as a ground state...
October 18, 2016: Biophysical Journal
Chengcheng Yang, Huangzhen Wang, Boxiang Zhang, Yimeng Chen, Yamin Zhang, Xin Sun, Guodong Xiao, Kejun Nan, Hong Ren, Sida Qin
BACKGROUND: LCL161, a novel Smac mimetic, is known to have anti-tumor activity and improve chemosensitivity in various cancers. However, the function and mechanisms of the combination of LCL161 and paclitaxel in non-small cell lung cancer (NSCLC) remain unknown. METHODS: Cellular inhibitor of apoptotic protein 1 and 2 (cIAP1&2) expression in NSCLC tissues and adjacent non-tumor tissues were assessed by immunohistochemistry. The correlations between cIAP1&2 expression and clinicopathological characteristics, prognosis were analyzed...
September 30, 2016: Journal of Experimental & Clinical Cancer Research: CR
Grace Gar-Lee Yue, Sida Xie, Julia Kin-Ming Lee, Hin-Fai Kwok, Si Gao, Yin Nian, Xiao-Xiao Wu, Chun-Kwok Wong, Ming-Hua Qiu, Clara Bik-San Lau
Actein is a triterpene glycoside isolated from the rhizomes of Cimicifuga foetida (Chinese herb "shengma") which could inhibit the growth of breast cancer cells. Nevertheless, the effect of actein on angiogenesis, which is an essential step for tumor growth and metastasis, has never been reported. Hence, this study aimed to investigate the in vitro and in vivo effects of actein on angiogenesis using human microvascular endothelial cells (HMEC-1), matrigel plug and tumor-bearing mouse models. Our results showed that actein significantly inhibited the proliferation, reduced the migration and motility of endothelial cells, and it could suppress the protein expressions of VEGFR1, pJNK and pERK, suggesting that JNK/ERK pathways were involved...
October 12, 2016: Scientific Reports
Juliane Wagner, Michael Granvogl, Peter Schieberle
Application of the molecular sensory science concept including aroma extract dilution analysis (AEDA) on the basis of gas chromatography-olfactometry combined with gas chromatography-mass spectrometry elucidated the key odorants of raw licorice (Glycyrrhiza glabra L.). Fifty aroma-active compounds were located via AEDA, 16 thereof were identified in raw licorice for the first time. γ-Nonalactone, 4-hydroxy-2,5-dimethylfuran-3(2H)-one, and 4-hydroxy-3-methoxybenzaldehyde showed the highest flavor dilution (FD) factor of 1024...
October 11, 2016: Journal of Agricultural and Food Chemistry
Yihao Zhang, Long Qian, Weijia Wei, Yu Wang, Beining Wang, Pingping Lin, Wenchao Liu, Luze Xu, Xiang Li, Dongming Liu, Sida Cheng, Jiaofeng Li, Yixuan Ye, Hang Li, Xiaohan Zhang, Yiming Dong, Xuejin Zhao, Cuihua Liu, Haoqian M Zhang, Qi Ouyang, Chunbo Lou
We developed an in vitro DNA detection system using a pair of dCas9 proteins linked to split halves of luciferase. Luminescence was induced upon co-localization of the reporter pair to a ~44 bp target sequence defined by sgRNAs. We used the system to detect Mycobacterium tuberculosis DNA with high specificity and sensitivity. The re-programmability of dCas9 was further leveraged in an array design that accesses sequence information across the entire genome.
October 10, 2016: ACS Synthetic Biology
Jin Han, Philip J Batterham, Alison L Calear, Yang Wu, Yiyun Shou, Bregje A J van Spijker
This paper reports the validation of the Chinese versions of the Suicidal Ideation Attributes Scale (SIDAS), Stigma of Suicide Scale (short form, SOSS), and Literacy of Suicide Scale (short form, LOSS) among 57 Chinese and English bilinguals and 224 Chinese university students. All the translated scales showed high correlations with the original versions. The translated SIDAS and refined SOSS demonstrated robust factor structures, good internal consistency and convergent validity. Chinese students with self-reported depression symptoms tended to have higher glorification of suicide and lower suicide literacy...
August 11, 2016: Death Studies
Katrin Matheis, Michael Granvogl
The sensomics approach was used to clarify the formation of the fusty/musty off-flavor of native cold-pressed rapeseed oil. A "positive control" (PC) showing the desired sensory attributes and an oil eliciting a fusty/musty off-flavor (OF) were analyzed. Comparative aroma extract dilution analysis (cAEDA), identification experiments, quantitation by stable isotope dilution assays (SIDAs), calculation of odor activity values (OAVs), and aroma recombination resulted in 11 odorants with an OAV ≥ 1 in PC. Main differences between both oils were obtained for compounds caused by microbial influence revealing significant higher concentrations in OF, e...
October 7, 2016: Journal of Agricultural and Food Chemistry
F A Andoulo, M Kowo, G Ngatcha, A N Ndam, B Awouoyiegnigni, M B Sida, C Tzeuton, E C Ndjitoyap Ndam
OBJECTIVE: To determine the prevalence of Helicobacter pylori (H. pylori) infection and of various upper gastrointestinal (GI) lesions in HIV(+) patients with GI symptoms and the relation of H. pylori infection to CD4 cell counts. MATERIAL AND METHODS: In all, 56 HIV(+) patients and 56 age- and sex-matched HIV(-) controls, all with upper GI symptoms, were evaluated by an upper endoscopy examination and gastric biopsy. H. pylori status was assessed with a urease test and histology...
August 1, 2016: Médecine et Santé Tropicales
Feng Xu, Sida Pan, Nicholas C Bambakidis
Facial nerve schwannomas are rare, benign, nerve-sheath tumors. They can occur in any segment of the facial nerve, and often clinically and radiographically mimic the most common vestibular schwannoma when extending into the cerebellopontine angle. The optimal treatment strategy for intracranial facial nerve schwannomas remains controversial and includes observation, resection, and stereotactic radiosurgery. In this article, we review the natural history, clinical features, diagnosis and current management of facial nerve schwannomas...
September 28, 2016: World Neurosurgery
Markus Kopp, Kerstin Dürr, Matthias Steigleder, Thomas Clavel, Michael Rychlik
Folate-producing bifidobacteria have been studied extensively but appropriate methods for detailed quantitation of intra- and extracellular pteroylmono- and pteroylpolyglutamate patterns are lacking. Therefore, B. adolescentis DSM 20083(T) was cultivated in folate-free medium (FFM) for 24h to develop and validate stable isotope dilution assays (SIDAs) coupled with LC-MS/MS for the determination of 5-formyltetrahydrofolic acid (5-HCO-H4folate), 10-formylfolic acid (10-HCO-PteGlu), tetrahydrofolic acid (H4folate), folic acid (PteGlu) and 5-methyltetrahydrofolic acid (5-CH3-H4folate) including its di-, tri-, and tetraglutamic vitamers (5-CH3-H4PteGlu2-4)...
October 21, 2016: Journal of Chromatography. A
Bruno L Anjos, Paulo V Peixoto, Saulo A Caldas, Daniel Bhaltazar, Ticiana N França, Aníbal G Armién
Plant intoxications in wildlife are difficult to diagnose, are overlooked, or are sometimes even neglected. Hence, factors that induce wild animals to ingest poisonous plants have not been sufficiently documented. An outbreak of glycoprotein storage disease in sambar deer ( Cervus unicolor ), induced by ingestion of the swainsonine-containing plant, common wireweed (Sida carpinifolia), is reported. Nine out of 55 deer held by a zoo in Brazil were affected. The poisoning was characterized by emaciation and neurologic signs followed by unexpected death in some of the animals...
September 2016: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
Eva Ortner, Michael Granvogl, Peter Schieberle
Heat-processing of Brassica seeds led to the formation of a characteristic pleasant popcorn-like and coffee-like aroma impression compared to the mainly pea-like aroma of the corresponding raw seeds. To analyze this phenomenon on a molecular basis, raw and roasted white mustard seeds and rapeseeds were analyzed using the Sensomics approach. Application of comparative aroma extract dilution analysis (cAEDA) and identification experiments to raw and roasted (140 °C, 30 min) mustard seeds revealed 36 odorants (all identified for the first time) and 47 odorants (41 newly identified), respectively...
October 3, 2016: Journal of Agricultural and Food Chemistry
Aurélie Roland, Stéphane Delpech, Laurent Dagan, Marie-Agnès Ducasse, Florine Cavelier, Rémi Schneider
Both 3-mercaptohexan-1-ol (3MH) and 3-mercaptohexyl acetate (3MHA) were largely studied for the last 20 years due to their pleasant olfactory notes conferred to wine. Until now, many analytical methods focused only on the free forms of both 3MH and 3MHA in wine that provided partial information in the wine aroma evolution. Our study proposes new analytical measurements which allow quantification of both free and disulfide forms of 3MH and 3MHA to better understand the redox phenomenon occurring in wines and further, to orientate wine aroma evolution...
October 14, 2016: Journal of Chromatography. A
J Chanal, S Fouéré, F Yassir-Oria, N Spenatto, F Bouscarat, E Picot, P Martinet, C Vernay-Vaisse, F Pelletier, C Courtieu, V Baclet, C Bernier, D Aymar-Moulene, F Dupuis-Fourdan, A Passeron, C Bara-Passot, A-L Pinault, L Misery, M Janier, N Dupin
BACKGROUND: Since 2007 in France, human papilloma virus (HPV) vaccination has been licensed for use as a vaccine against HPV 6, 11, 16 and 18. The impact on the epidemiology of external genital warts (EGWs) in a large population remains unclear. OBJECTIVES: To determine epidemiologic and clinical features of patients presenting EGWs in France in the era of HPV vaccination. PATIENTS AND METHODS: In this prospective, observational study, we analyzed clinical features and treatments between January 1st, 2012 and March 31, 2012 for patients consulting for EGWs at 15 STI clinics throughout France...
September 19, 2016: Annales de Dermatologie et de Vénéréologie
Gabriela Tavares Magnabosco, Lívia Maria Lopes, Rubia Laine de Paula Andrade, Maria Eugênia Firmino Brunello, Aline Aparecida Monroe, Tereza Cristina Scatena Villa
OBJECTIVE: to analyze the offering of health actions and services for the control of tuberculosis for people living with HIV/AIDS being followed up in the Specialized Care Services for HIV/AIDS in Ribeirão Preto, SP, Brazil. METHOD: quantitative, exploratory survey study. Participated 253 people living with HIV/AIDS followed up by this service, considering as inclusion criteria: individuals older than 18 years living in the city and not inmates. Data collection was conducted from January 2012 to May 2013 through interviews with the support of a specific instrument...
July 11, 2016: Revista Latino-americana de Enfermagem
P Feuillet, F Lert, L Tron, C Aubriere, B Spire, R Dray-Spira
OBJECTIVES: Depression is common among people living with HIV (PLWHIV) and is associated with poorer therapeutic outcomes and risky behaviours. We sought to estimate the prevalence of major depressive episode (MDE) across PLWHIV groups, to compare this with its prevalence in the general population and to assess factors associated with it. METHODS: We used data from the Agence Nationale de Recherche sur le Sida et les Hépatites Virales (ANRS)-Vespa2 study, a national study on a representative sample of PLWHIV conducted in France in 2011...
September 14, 2016: HIV Medicine
Jacek Antonkiewicz, Barbara Kołodziej, Elżbieta Jolanta Bielińska
The aim of the study was to evaluate the efficacy of the multiflora rose var. 'Jatar' (Rosa multiflora Thunb. ex Mur) and the Virginia fanpetals (Sida hermaphrodita Rusby) to phytoextract heavy metals from municipal sewage sludge. The 6-year field experiment involved four levels of fertilization with sewage sludge at doses of 0, 10, 20, 40, and 60 Mg DM sludge · ha(-1). The increasing doses of sewage sludge were found to increase significantly the yield of multiflora rose and Virginia fanpetals biomass. They also significantly elevated the content of heavy metals in these plants...
September 7, 2016: International Journal of Phytoremediation
Yesica Yolanda Rangel Flores
OBJECTIVE: to analyze the influence of sexual violence on the perception and management of the risk of HIV in women married to migrants. METHODS: study with an ethnographic approach carried out in urban and rural communities. Data were obtained by methodological triangulation, with participant and non-participant observation, as well as interviews. The informants were 21 women married to international migrants. The interviews were transcribed and discourse analysis was applied to them...
2016: Revista Latino-americana de Enfermagem
Liang Cheng, Anyanee Kamkaew, Sida Shen, Hector F Valdovinos, Haiyan Sun, Reinier Hernandez, Shreya Goel, Teng Liu, Cyrus R Thompson, Todd E Barnhart, Zhuang Liu, Weibo Cai
While position emission tomography (PET) is an important molecular imaging technique for both preclinical research and clinical disease diagnosis/prognosis, chelator-free radiolabeling has emerged as a promising alternative approach to label biomolecules or nanoprobes in a facile way. Herein, starting from bottom-up synthesized WS2 nanoflakes, this study fabricates a unique type of WS2 /WOx nanodots, which can function as inherent hard oxygen donor for stable radiolabeling with Zirconium-89 isotope ((89) Zr)...
September 4, 2016: Small
Julia S Martín Del Campo, Nancy Vogelaar, Karishma Tolani, Karina Kizjakina, Kim Harich, Pablo Sobrado
Aspergillus fumigatus is an opportunistic fungal pathogen and the most common causative agent of fatal invasive mycoses. The flavin-dependent monooxygenase siderophore A (SidA) catalyzes the oxygen and NADPH dependent hydroxylation of l-ornithine (l-Orn) to N(5)-l-hydroxyornithine in the biosynthetic pathway of hydroxamate-containing siderophores in A. fumigatus. Deletion of the gene that codes for SidA has shown that it is essential in establishing infection in mice models. Here, a fluorescence polarization high-throughput assay was used to screen a 2320 compound library for inhibitors of SidA...
September 15, 2016: ACS Chemical Biology
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"