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Quadruple negative

Jaewook Kim, Kijong Song, Eunae Park, Keunhwa Kim, Gabyong Bae, Giltsu Choi
Seedling hypocotyls display negative gravitropism in the dark but agravitropism in the light. The Arabidopsis thaliana pif quadruple mutant (pifQ), which lacks four PHYTOCHROME-INTERACTING FACTORS (PIFs), is agravitropic in the dark. Endodermis-specific expression of PIF1 rescues gravitropism in pifQ mutant seedlings. Since phytochromes induce light responses by inhibiting PIFs and the COP1-SPA ubiquitin E3 ligase complex in the nucleus, we asked whether phyB can cell autonomously inhibit hypocotyl negative gravitropism in the endodermis...
October 6, 2016: Plant Cell
Dámaris Núñez-Gómez, Alcione Aparecida de Almeida Alves, Flavio Rubens Lapolli, María A Lobo-Recio
Mine-impacted water (MIW) is one of the most serious mining problems and has a high negative impact on water resources and aquatic life. The main characteristics of MIW are a low pH (between 2 and 4) and high concentrations of SO4(2-) and metal ions (Cd, Cu, Ni, Pb, Zn, Fe, Al, Cr, Mn, Mg, etc.), many of which are toxic to ecosystems and human life. Shrimp shell was selected as a MIW treatment agent because it is a low-cost metal-sorbent biopolymer with a high chitin content and contains calcium carbonate, an acid-neutralizing agent...
October 9, 2016: Chemosphere
Jane Date C Hon, Baljit Singh, Aysegul Sahin, Gang Du, Jinhua Wang, Vincent Y Wang, Fang-Ming Deng, David Y Zhang, Marie E Monaco, Peng Lee
Treatment protocols for breast cancer depend predominantly on receptor status with respect to estrogen (estrogen receptor alpha), progesterone (progesterone receptor) and human epidermal growth factor [human epidermal growth factor receptor 2 (HER2)]. The presence of one or more of these receptors suggests that a treatment targeting these pathways might be effective, while the absence of, or in the case of HER2, lack of overexpression of, all of these receptors, termed triple negative breast cancer (TNBC), indicates a need for the more toxic chemotherapy...
2016: American Journal of Cancer Research
Byalakere Rudraiah Chandra Shekar, Ramesh Nagarajappa, Rupal Singh, S Suma, Rupesh Thakur
BACKGROUND: The rise in disease incidence, increased resistance of pathogenic bacteria to currently used antibiotics and chemotherapeutics, opportunistic infections in immunocompromised individuals, and financial considerations in developing countries necessitates alternate preventive and treatment strategies for oral diseases. OBJECTIVE: The objective of the study is to assess the antimicrobial efficacy of triple and quadruple combinations of Acacia nilotica (AN), Murraya koenigii (Linn...
July 2016: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
S Tu, M Rosenthal, D Wang, J Huang, Y Chen
BACKGROUND: Controversies about the performance of conventional prenatal screening using maternal serum and ultrasound markers (PSMSUM) in detecting Down syndrome (DS) have been raised as a result of a recently available noninvasive prenatal test based on cell-free fetal DNA sequencing. OBJECTIVES: To evaluate the screening performance of PSMSUM in detecting DS in Chinese women. SEARCH STRATEGY: An exhaustive literature search of MEDLINE, Embase, the Cochrane Library, ISI Web of Science and China BioMedical Disc...
September 2016: BJOG: An International Journal of Obstetrics and Gynaecology
A Ben Aissa, J J Jara, R M Sebastián, A Vallribera, S Campoy, M I Pividori
Due to the increasing need of rapid tests for application in low resource settings, WHO summarized their ideal features under the acronym ASSURED (Affordable, Sensitive, Specific, User-friendly, Rapid and Robust, Equipment-free, Delivered to those who need it). In this work, two different platforms for the rapid and simultaneous testing of the foodborne pathogens E. coli O157:H7 and Salmonella enterica, in detail a nucleic acid lateral flow and an electrochemical magneto-genosensor are presented and compared in terms of their analytical performance...
August 17, 2016: Biosensors & Bioelectronics
Keunhwa Kim, Jinkil Jeong, Jeongheon Kim, Nayoung Lee, Mi Eon Kim, Sangil Lee, Sun Chang Kim, Giltsu Choi
Mutations in Phytochrome Interacting Factors (PIFs) induce a conversion of the endodermal amyloplasts necessary for gravity sensing to plastids with developed thylakoids accompanied by abnormal activation of photosynthetic genes in the dark. In this study, we investigated how PIFs regulate endodermal plastid development by performing comparative transcriptome analysis. We show that both endodermal expression of PIF1 and global expression of the PIF quartet induce transcriptional changes in genes enriched for nuclear-encoded photosynthetic genes such as LHCA and LHCB...
October 10, 2016: Molecular Plant
Nathan C Lo, Jean T Coulibaly, Eran Bendavid, Eliézer K N'Goran, Jürg Utzinger, Jennifer Keiser, Isaac I Bogoch, Jason R Andrews
BACKGROUND: A key epidemiologic feature of schistosomiasis is its focal distribution, which has important implications for the spatial targeting of preventive chemotherapy programs. We evaluated the diagnostic accuracy of a urine pooling strategy using a point-of-care circulating cathodic antigen (POC-CCA) cassette test for detection of Schistosoma mansoni, and employed simulation modeling to test the classification accuracy and efficiency of this strategy in determining where preventive chemotherapy is needed in low-endemicity settings...
August 2016: PLoS Neglected Tropical Diseases
Z Yan-Yan, G Li-Li, S Guo-Ming, R Rong, T Jing-Zhen
A simple, rapid, and specific high-performance liquid chromatograph coupled with a tandem mass spectrometry method has been developed and validated for the quantification of ginkgolides in rat plasma, and the main pharmacokinetic parameters of ginkgolides after oral administration of Ginkgo biloba extract (GBE) was acquired. Methods: Plasma samples were pretreated with ethyl acetate extraction. Sulfamethoxazole was used as the internal standard (IS). Chromatographic separation was achieved on an Eclipse XDB-C18 column (2...
October 2016: Drug Research
Daniela Gasparotto, Sabrina Rossi, Maurizio Polano, Elena Tamborini, Erica Lorenzetto, Marta Sbaraglia, Alessia Mondello, Marco Massani, Stefano Lamon, Raffaella Bracci, Alessandra Mandolesi, Elisabetta Frate, Franco Stanzial, Jerin Agaj, Guido Mazzoleni, Silvana Pilotti, Alessandro Gronchi, Angelo Paolo Dei Tos, Roberta Maestro
PURPOSE: The majority of Gastrointestinal Stromal Tumors (GISTs) are driven by KIT, PDGFRA or, less commonly, BRAF mutations, and SDH gene inactivation is involved in a limited fraction of gastric lesions. However, about 10% of GISTs are devoid of any of such alterations and are poorly responsive to standard treatments. This study aims to shed light on the molecular drivers of quadruple-negative GISTs. EXPERIMENTAL DESIGN: Twenty-two sporadic quadruple-negative GISTs with no prior association with Neurofibromatosis Type 1 syndrome were molecularly profiled for a panel of genes belonging to tyrosine kinase pathways or previously implicated in GISTs...
July 7, 2016: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
Qingqing Cai, Hiroko Fukushima, Mai Yamamoto, Nami Ishii, Tomoaki Sakamoto, Tetsuya Kurata, Hiroyasu Motose, Taku Takahashi
The acaulis5 (acl5) mutant of Arabidopsis thaliana is defective in the biosynthesis of thermospermine and shows a dwarf phenotype associated with excess xylem differentiation. SAC51 was identified from a dominant suppressor of acl5, sac51-d, and encodes a basic helix-loop-helix protein. The sac51-d mutant has a premature termination codon in an upstream open reading frame (uORF) that is conserved among all four members of the SAC51 family, SAC51 and SACL1-SACL3 This suggests that thermospermine cancels the inhibitory effect of the uORF in main ORF translation...
August 2016: Plant & Cell Physiology
Susan H Boklage, Allen W Mangel, Varun Ramamohan, Deirdre Mladsi, Tao Wang
BACKGROUND: The treatment failure rate for Helicobacter pylori eradication therapy is ~20% due to poor patient compliance and increased antibiotic resistance. This analysis assessed the cost-effectiveness of universal post-treatment testing to confirm eradication of H. pylori infection in adults. METHODS: Decision-analytic models evaluated the cost-effectiveness of universal post-treatment testing (urea breath test [UBT] or monoclonal fecal antigen test [mFAT]) vs no testing (Model 1), and UBT vs mFAT after adjusting for patient adherence to testing (Model 2) in adults who previously received first-line antimicrobial therapy...
2016: Patient Preference and Adherence
Xu Holtkotte, Stefan Dieterle, Leonie Kokkelink, Oliver Artz, Lisa Leson, Kirsten Fittinghoff, Ryosuke Hayama, Margaret Ahmad, Ute Hoecker
The COP1/SPA complex is an E3 ubiquitin ligase which acts as a key repressor of photomorphogenesis in dark-grown plants. While both, COP1 and the four SPA proteins contain coiled-coil and WD-repeat domains, SPA proteins differ from COP1 in carrying an N-terminal kinase-like domain which is not present in COP1. Here, we have analyzed the effects of deletions and missense mutations in the N-terminus of SPA1 when expressed in a spa-quadruple mutant background devoid of any other SPA proteins. Deletion of the large N-terminus of SPA1 severely impaired SPA1 activity in transgenic plants with respect to seedling etiolation, leaf expansion and flowering time...
June 16, 2016: Plant Journal: for Cell and Molecular Biology
Eva Segelov, Paul Waring, Jayesh Desai, Kate Wilson, Val Gebski, Subotheni Thavaneswaran, Elena Elez, Craig Underhill, Nick Pavlakis, Lorraine Chantrill, Louise Nott, Michael Jefford, Mustafa Khasraw, Fiona Day, Harpreet Wasan, Fortunato Ciardiello, Chris Karapetis, Warren Joubert, Guy van Hazel, Andrew Haydon, Tim Price, Sabine Tejpar, Niall Tebbutt, Jeremy Shapiro
BACKGROUND: Patients with metastatic colorectal cancer whose disease has progressed on oxaliplatin- and irinotecan-containing regimens may benefit from EGFR-inhibiting monoclonal antibodies if they do not contain mutations in the KRAS gene (are "wild type"). It is unknown whether these antibodies, such as cetuximab, are more efficacious in refractory metastatic colorectal cancer as monotherapy, or in combination with irinotecan. Lack of mutation in KRAS, BRAF and PIK3CA predicts response to EFGR-inhibitors...
2016: BMC Cancer
Carey Lambert, Thomas R Lerner, Nhat Khai Bui, Hannah Somers, Shin-Ichi Aizawa, Susan Liddell, Ana Clark, Waldemar Vollmer, Andrew L Lovering, R Elizabeth Sockett
The peptidoglycan wall, located in the periplasm between the inner and outer membranes of the cell envelope in Gram-negative bacteria, maintains cell shape and endows osmotic robustness. Predatory Bdellovibrio bacteria invade the periplasm of other bacterial prey cells, usually crossing the peptidoglycan layer, forming transient structures called bdelloplasts within which the predators replicate. Prey peptidoglycan remains intact for several hours, but is modified and then degraded by escaping predators. Here we show predation is altered by deleting two Bdellovibrio N-acetylglucosamine (GlcNAc) deacetylases, one of which we show to have a unique two domain structure with a novel regulatory"plug"...
2016: Scientific Reports
Zixing Li, Rainer Waadt, Julian I Schroeder
The phytohormone abscisic acid (ABA) is critical to plant development and stress responses. Abiotic stress triggers an ABA signal transduction cascade, which is comprised of the core components PYL/RCAR ABA receptors, PP2C-type protein phosphatases, and protein kinases. Small GTPases of the ROP/RAC family act as negative regulators of ABA signal transduction. However, the mechanisms by which ABA controls the behavior of ROP/RACs have remained unclear. Here, we show that an Arabidopsis guanine nucleotide exchange factor protein RopGEF1 is rapidly sequestered to intracellular particles in response to ABA...
May 2016: PLoS Biology
M Wang, Y X Wang, L Yang, J G Li, J L Zhang, Y F Zhao, Y N Wu
OBJECTIVE: To develop a method for the determination of 11 perfluorosulfonate and perfluorocarboxylate precursors in eggs using ultra-high performance liquid chromatography-tandem quadruple mass spectrometry (UPLC-MS/MS). METHODS: The target compounds of egg were extracted with 100 mmol/L NaOH-acetonitrile /water(90∶10, V/V) by ultrasonic. Then the extract was purified by solid phase extraction (Waters Oasis(@) WAX 6cc) and then eluted with 9% NH4OH in methanol...
May 2016: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
Yen-Fu Chen, Min-Shu Hsieh, Shang-Gin Wu, Yih-Leong Chang, Chong-Jen Yu, James Chih-Hsin Yang, Pan-Chyr Yang, Jin-Yuan Shih
INTRODUCTION: The efficacy of pemetrexed-based chemotherapy in patients with advanced lung adenocarcinoma with novel ROS proto-oncogene 1, receptor tyrosine kinase gene (ROS1) oncogenic rearrangement is unclear. This study aimed to compare the efficacy of pemetrexed-based chemotherapy in patients with advanced ROS1-fusion lung adenocarcinoma with its efficacy in those having different driver mutations. METHODS: We retrospectively identified patients with advanced lung adenocarcinoma who were screened for epidermal growth factor receptor gene (EGFR) mutations, echinoderm microtubule associated protein like 4 gene (EML4)-anaplastic lymphoma receptor tyrosine kinase gene (ALK) translocation, Kirsten rat sarcoma viral oncogene homolog gene (KRAS) mutations, and ROS1 fusion by using multiplex reverse-transcriptase polymerase chain reaction...
July 2016: Journal of Thoracic Oncology
B R Chandra Shekar, Ramesh Nagarajappa, Richa Jain, Rupal Singh, Rupesh Thakur, Suma Shekar
BACKGROUND: The aim of this in vitro study was to assess antimicrobial efficacy of Acacia nilotica, Murraya koenigii (L.) Sprengel, Eucalyptus hybrid, Psidium guajava extracts, and their combination on Streptococcus mutans and Lactobacillus acidophilus. MATERIALS AND METHODS: The branches of four plants were collected, identified, and authenticated by a taxonomist. The plants were rinsed in water, healthy leaves were separated and shade dried over a period of 3-4 weeks...
March 2016: Dental Research Journal
Xiuman Xie, Wanyang Sun, Jingzhuo Miao, Jingyi Huang, Jingyao Xu, Xiaolin Liu, Henry Sun, Ling Tong, Guoxiang Sun
7'(Z)-(8″S, 8‴S)-epi-Salvianolic acid E (compound 1) and (7'R, 8'R, 8″S, 8‴S)-epi-salvianolic acid B (compound 2), two novel analogs of salvianolic acid B (Sal B), have been recently isolated from Salvianolic acid for injection. They both show powerful antioxidant effects, including inducing NQO1 activity and scavenging DPPH free radical, and potential protecting effects for cerebral ischemia. However, no reports have been described the pharmacokinetic study of them. In this study, an ultra-fast liquid chromatography-tandem mass spectrometry (UFLC-MS/MS) method was developed and validated for the determination of compound 1, compound 2 and Sal B in rat plasma, respectively...
June 1, 2016: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
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