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https://www.readbyqxmd.com/read/28903556/4-hydroxyphenylpyruvate-dioxygenase-inhibitors-from-chemical-biology-to-agrochemicals
#1
Ferdinand Ndikuryayo, Behrooz Moosavi, Wen-Chao Yang, Guang-Fu Yang
The development of new herbicides is receiving considerable attention to control weed biotypes resistant to current herbicides. Consequently, new enzymes are always desired as targets for herbicide discovery. 4-Hydroxyphenylpyruvate dioxygenase (HPPD, EC 1.13.11.27) is an enzyme engaged in photosynthetic activity and catalyzes the transformation of 4-hydroxyphenylpyruvic acid (HPPA) into homogentisic acid (HGA). HPPD inhibitors constitute a promising area of discovery and development of innovative herbicides with some advantages, including excellent crop selectivity, low application rates, and broad-spectrum weed control...
September 14, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28836813/the-trip-of-a-lifetime-hallucinogen-persisting-perceptual-disorder
#2
Lauren Anderson, Hannah Lake, Mark Walterfang
OBJECTIVES: The differential diagnosis of psychotic symptoms is broad and extends beyond primary psychotic and affective disorders. We aim to illustrate that the chronology and phenomenological nature of hallucinatory symptoms may provide clues towards alternative diagnoses, such as hallucinogen persisting perceptual disorder (HPPD). We describe the resurgence of visual pseudo-hallucinations in a young woman in the context of previous substance-induced hallucinatory symptoms and a prior diagnosis of occipital lobe epilepsy...
August 1, 2017: Australasian Psychiatry: Bulletin of Royal Australian and New Zealand College of Psychiatrists
https://www.readbyqxmd.com/read/28799707/reversing-resistance-to-tembotrione-in-an-amaranthus-tuberculatus-var-rudis-population-from-nebraska-usa-with-cytochrome-p450-inhibitors
#3
Maxwel C Oliveira, Todd A Gaines, Franck E Dayan, Eric L Patterson, Amit J Jhala, Stevan Z Knezevic
A population of Amaranthus tuberculatus (var. rudis) was confirmed resistant to 4-hydroxyphenylpyruvate dioxygenase (HPPD)-inhibitor herbicides (mesotrione, tembotrione, and topramezone) in a seed corn/soybean rotation in Nebraska. Further investigation confirmed a non-target-site resistance mechanism in this population. The main objective of this study was to explore the role of cytochrome P450 inhibitors for restoring the efficacy of HPPD-inhibitor herbicides on the HPPD-inhibitor resistant A. tuberculatus population from Nebraska, USA (HPPD-R)...
August 11, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28746990/identification-of-a-gene-involved-in-negative-regulation-for-pyomelanin-production-in-ralstonia-solanacearum
#4
Shabir Ahmad, Seung Yeup Lee, Raees Khan, Hyun Gi Kong, Geun Ju Son, Nazish Roy, Kihyuck Choi, Seon-Woo Lee
Ralstonia solanacearum causes bacterial wilt in a wide variety of host plant species and produces a melanin-like blackish-brown pigment in stationary phase when grown in minimal medium supplemented with tyrosine. To study melanin production regulation in R. solanacearum, five mutants exhibiting over-production of melanin-like pigments were selected from a transposon (Tn) insertion mutant library of R. solanacearum SL341. Most of the mutants except one (SL341T) were not complemented by the original gene or over-produced melanins...
July 27, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28662111/mechanism-of-resistance-to-mesotrione-in-an-amaranthus-tuberculatus-population-from-nebraska-usa
#5
Shiv S Kaundun, Sarah-Jane Hutchings, Richard P Dale, Anushka Howell, James A Morris, Vance C Kramer, Vinod K Shivrain, Eddie Mcindoe
Amaranthus tuberculatus is a troublesome weed in corn and soybean production systems in Midwestern USA, due in part to its ability to evolve multiple resistance to key herbicides including 4-hydroxyphenylpyruvate dioxygenase (HPPD). Here we have investigated the mechanism of resistance to mesotrione, an important chemical for managing broadleaf weeds in corn, in a multiple herbicide resistant population (NEB) from Nebraska. NEB showed a 2.4-fold and 45-fold resistance increase to mesotrione compared to a standard sensitive population (SEN) in pre-emergence and post-emergence dose-response pot tests, respectively...
2017: PloS One
https://www.readbyqxmd.com/read/28654720/comparing-triggers-to-visual-disturbances-among-individuals-with-positive-vs-negative-experiences-of-hallucinogen-persisting-perception-disorder-hppd-following-lsd-use
#6
Shaul Lev-Ran, Daniel Feingold, Craig Goodman, Arturo G Lerner
BACKGROUND AND OJECTIVE: Exploring differences in visual disturbances and triggers between Hallucinogen-Persisting-Perceptual-Disorder (HPPD) Type I ("positive/benign") and II ("negative/distressing"). METHODS: Forty individuals with HPPD and prior LSD use completed clinical questionnaires. RESULTS: The most common type of visual disturbances among individuals with HPPD I and II was slow movement of still objects and trailing phenomena, respectively...
June 27, 2017: American Journal on Addictions
https://www.readbyqxmd.com/read/28637410/new-research-for-quinazoline-2-4-diones-as-hppd-inhibitors-based-on-2d-mlr-and-3d-qsar-models
#7
Ying Fu, Yi-Na Sun, Hai-Feng Cao, Ke-Han Yi, Li-Xia Zhao, Jia-Zhong Li, Fei Ye
4-Hydroxyphenylpyruvate dioxygenase (HPPD), converting p-hydroxyphenylpyruvate to homogentisate, is an important target for treating type I tyrosinemia and synthesizing novel herbicides due to its significant role in tyrosine catabolism. HPPD inhibitors, sulcotrione, mesotrione and benzobicylon etc. have been used in commercialized herbicides by binding to HPPD. Based on the structure-activity relationships, a series of quinolinone-2,4-diones derivatives were studied using combined of 2D-MLR and 3D-QSARand the structural requirements for their HPPD inhibition have been investigated...
June 21, 2017: Combinatorial Chemistry & High Throughput Screening
https://www.readbyqxmd.com/read/28598377/3d-pharmacophore-based-virtual-screening-and-docking-approaches-toward-the-discovery-of-novel-hppd-inhibitors
#8
Ying Fu, Yi-Na Sun, Ke-Han Yi, Ming-Qiang Li, Hai-Feng Cao, Jia-Zhong Li, Fei Ye
p-Hydroxyphenylpyruvate dioxygenase (HPPD) is not only the useful molecular target in treating life-threatening tyrosinemia type I, but also an important target for chemical herbicides. A combined in silico structure-based pharmacophore and molecular docking-based virtual screening were performed to identify novel potential HPPD inhibitors. The complex-based pharmacophore model (CBP) with 0.721 of ROC used for screening compounds showed remarkable ability to retrieve known active ligands from among decoy molecules...
June 9, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28443128/physiological-and-molecular-characterization-of-hydroxyphenylpyruvate-dioxygenase-hppd-inhibitor-resistance-in-palmer-amaranth-amaranthus-palmeri-s-wats
#9
Sridevi Nakka, Amar S Godar, Prashant S Wani, Curtis R Thompson, Dallas E Peterson, Jeroen Roelofs, Mithila Jugulam
Herbicides that inhibit hydroxyphenylpyruvate dioxygenase (HPPD) such as mesotrione are widely used to control a broad spectrum of weeds in agriculture. Amaranthus palmeri is an economically troublesome weed throughout the United States. The first case of evolution of resistance to HPPD-inhibiting herbicides in A. palmeri was documented in Kansas (KS) and later in Nebraska (NE). The objective of this study was to investigate the mechansim of HPPD-inhibitor (mesotrione) resistance in A. palmeri. Dose response analysis revealed that this population (KSR) was 10-18 times more resistant than their sensitive counterparts (MSS or KSS)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28352227/a-novel-genetic-screen-identifies-modifiers-of-age-dependent-amyloid-%C3%AE-toxicity-in-the-drosophila-brain
#10
Lautaro F Belfiori-Carrasco, María S Marcora, Nadia I Bocai, M Fernanda Ceriani, Laura Morelli, Eduardo M Castaño
The accumulation of amyloid β peptide (Aβ) in the brain of Alzheimer's disease (AD) patients begins many years before clinical onset. Such process has been proposed to be pathogenic through the toxicity of Aβ soluble oligomers leading to synaptic dysfunction, phospho-tau aggregation and neuronal loss. Yet, a massive accumulation of Aβ can be found in approximately 30% of aged individuals with preserved cognitive function. Therefore, within the frame of the "amyloid hypothesis", compensatory mechanisms and/or additional neurotoxic or protective factors need to be considered and investigated...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28273564/hepatotoxicity-and-proteomic-mechanism-of-di-n-butyl-di-4-chlorobenzohydroxamato-tin-iv-dbdct-in-vivo
#11
Li Tang, Jie-Ran Luo, Yun-Lan Li, Rui Ge, Qing-Shan Li
Di-n-butyl-di-(4-chlorobenzohydroxamato)tin(IV) (DBDCT) is an anti-tumour organotin(IV) compound with hepatotoxicity. To investigate the hepatotoxicity and mechanisms of DBDCT in vivo, proteomic technology 2D gel combined with MALDI-TOF-MS was used in our research. Results indicated that DBDCT increased AST, AKP and ACP activities and decreased ALT activity. Further, sporadic eosinophilic changes and nuclear pyknosis were visible in hepatic pathological observation. Proteomic analysis showed that twenty-two proteins involved in amino acid, nucleic acid, carbohydrate and lipid metabolism, stress response, multicellular organism development and cell apoptosis were differentially expressed and identified...
April 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28187310/proteomic-analysis-of-liver-tissue-from-rainbow-trout-oncorhynchus-mykiss-under-high-rearing-density-after-administration-of-dietary-vitamin-e-and-selenium-nanoparticles
#12
Mahdi Naderi, Saeed Keyvanshokooh, Amir Parviz Salati, Alireza Ghaedi
The aim of the present study was to investigate the effects of dietary vitamin E (vit E) and selenium nanoparticles (nanoSe) on liver proteome profile of rainbow trout under high density condition. To correlate the proteome modifications with physiological aspects, growth, serum metabolites (cortisol, glucose, lactate, ALT, AST, and ALP), and liver antioxidant-related parameters (SOD, GPx, CAT, and MDA) were also examined. A total of 1275 fish (average weight of 42.6±2.3g) were stocked into 12 tanks at a density of 80kgm(-3)...
June 2017: Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
https://www.readbyqxmd.com/read/28128559/4-hydroxyphenylpyruvate-dioxygenase-and-its-inhibition-in-plants-and-animals-small-molecules-as-herbicides-and-agents-for-the-treatment-of-human-inherited-diseases
#13
REVIEW
Annalisa Santucci, Giulia Bernardini, Daniela Braconi, Elena Petricci, Fabrizio Manetti
This review mainly focuses on the physiological function of 4-hydroxyphenylpyruvate dioxygenase (HPPD), as well as on the development and application of HPPD inhibitors of several structural classes. Among them, one illustrative example is represented by compounds belonging to the class of triketone compounds. They were discovered by serendipitous observations on weed growth and were developed as bleaching herbicides. Informed reasoning on nitisinone (NTBC, 14), a triketone that failed to reach the final steps of the herbicidal design and development process, allowed it to become a curative agent for type I tyrosinemia (T1T) and to enter clinical trials for alkaptonuria...
May 25, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/27933872/an-efficient-one-pot-synthesis-of-2-aryloxyacetyl-cyclohexane-1-3-diones-as-herbicidal-4-hydroxyphenylpyruvate-dioxygenase-inhibitors
#14
Da-Wei Wang, Hong-Yan Lin, Bo He, Feng-Xu Wu, Tao Chen, Qiong Chen, Wen-Chao Yang, Guang-Fu Yang
4-Hydroxyphenylpyruvate dioxygenase (EC 1.13.11.27, HPPD) is an important target for new bleaching herbicides discovery. As a continuous work to discover novel crop selective HPPD inhibitor, a series of 2-(aryloxyacetyl)cyclohexane-1,3-diones were rationally designed and synthesized by an efficient one-pot procedure using N,N'-carbonyldiimidazole (CDI), triethylamine, and acetone cyanohydrin in CH2Cl2. A total of 58 triketone compounds were synthesized in good to excellent yields. Some of the triketones displayed potent in vitro Arabidopsis thaliana HPPD (AtHPPD) inhibitory activity...
November 30, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27846423/in-silico-target-prediction-for-elucidating-the-mode-of-action-of-herbicides-including-prospective-validation
#15
Rucha K Chiddarwar, Sebastian G Rohrer, Antje Wolf, Stefan Tresch, Sabrina Wollenhaupt, Andreas Bender
The rapid emergence of pesticide resistance has given rise to a demand for herbicides with new mode of action (MoA). In the agrochemical sector, with the availability of experimental high throughput screening (HTS) data, it is now possible to utilize in silico target prediction methods in the early discovery phase to suggest the MoA of a compound via data mining of bioactivity data. While having been established in the pharmaceutical context, in the agrochemical area this approach poses rather different challenges, as we have found in this work, partially due to different chemistry, but even more so due to different (usually smaller) amounts of data, and different ways of conducting HTS...
January 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/27822679/a-review-of-hallucinogen-persisting-perception-disorder-hppd-and-an-exploratory-study-of-subjects-claiming-symptoms-of-hppd
#16
John H Halpern, Arturo G Lerner, Torsten Passie
Hallucinogen persisting perception disorder (HPPD) is rarely encountered in clinical settings. It is described as a re-experiencing of some perceptual distortions induced while intoxicated and suggested to subsequently cause functional impairment or anxiety. Two forms exist: Type 1, which are brief "flashbacks," and Type 2 claimed to be chronic, waxing, and waning over months to years. A review of HPPD is presented. In addition, data from a comprehensive survey of 20 subjects reporting Type-2 HPPD-like symptoms are presented and evaluated...
November 8, 2016: Current Topics in Behavioral Neurosciences
https://www.readbyqxmd.com/read/27758090/the-rise-and-future-of-glyphosate-and-glyphosate-resistant-crops
#17
Jerry M Green
Glyphosate and glyphosate-resistant crops had a revolutionary impact on weed management practices, but the epidemic of glyphosate-resistant (GR) weeds is rapidly decreasing the value of these technologies. In areas that fully adopted glyphosate and GR crops, GR weeds evolved and glyphosate and glyphosate traits now must be combined with other technologies. The chemical company solution is to combine glyphosate with other chemicals, and the seed company solution is to combine glyphosate resistance with other traits...
October 18, 2016: Pest Management Science
https://www.readbyqxmd.com/read/27757068/nurse-staffing-and-patient-outcomes-a-longitudinal-study-on-trend-and-seasonality
#18
Jianghua He, Vincent S Staggs, Sandra Bergquist-Beringer, Nancy Dunton
BACKGROUND: Time trends and seasonal patterns have been observed in nurse staffing and nursing-sensitive patient outcomes in recent years. It is unknown whether these changes were associated. METHODS: Quarterly unit-level nursing data in 2004-2012 were extracted from the National Database of Nursing Quality Indicators® (NDNQI®). Units were divided into groups based on patterns of missing data. All variables were aggregated across units within these groups and analyses were conducted at the group level...
2016: BMC Nursing
https://www.readbyqxmd.com/read/27726859/biochemical-properties-and-subcellular-localization-of-tyrosine-aminotransferases-in-arabidopsis-thaliana
#19
Minmin Wang, Kyoko Toda, Hiroshi A Maeda
Plants produce various L-tyrosine (Tyr)-derived compounds that are of pharmaceutical or nutritional importance to humans. Tyr aminotransferase (TAT) catalyzes the reversible transamination between Tyr and 4-hydroxyphenylpyruvate (HPP), the initial step in the biosynthesis of many Tyr-derived plant natural products. Herein reported is the biochemical characterization and subcellular localization of TAT enzymes from the model plant Arabidopsis thaliana. Phylogenetic analysis showed that Arabidopsis has at least two homologous TAT genes, At5g53970 (AtTAT1) and At5g36160 (AtTAT2)...
December 2016: Phytochemistry
https://www.readbyqxmd.com/read/27706847/structurally-diverse-dehydroshikimate-dehydratase-variants-participate-in-microbial-quinate-catabolism
#20
James Peek, Joseph Roman, Graham R Moran, Dinesh Christendat
Quinate and shikimate can be degraded by a number of microbes. Dehydroshikimate dehydratases (DSDs) play a central role in this process, catalyzing the conversion of 3-dehydroshikimate to protocatechuate, a common intermediate of aromatic degradation pathways. DSDs have applications in metabolic engineering for the production of valuable protocatechuate-derived molecules. Although a number of Gram-negative bacteria are known to catabolize quinate and shikimate, only limited information exists on the quinate/shikimate catabolic enzymes found in these organisms...
January 2017: Molecular Microbiology
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