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https://www.readbyqxmd.com/read/28918554/genome-wide-identification-classification-evolutionary-analysis-and-gene-expression-patterns-of-the-protein-kinase-gene-family-in-wheat-and-aegilops-tauschii
#1
Jun Yan, Peisen Su, Zhaoran Wei, Eviatar Nevo, Lingrang Kong
In this study we systematically identified and classified PKs in Triticum aestivum, Triticum urartu and Aegilops tauschii. Domain distribution and exon-intron structure analyses of PKs were performed, and we found conserved exon-intron structures within the exon phases in the kinase domain. Collinearity events were determined, and we identified various T. aestivum PKs from polyploidizations and tandem duplication events. Global expression pattern analysis of T. aestivum PKs revealed that some PKs might participate in the signaling pathways of stress response and developmental processes...
September 16, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28916825/de-novo-transcriptome-of-the-cosmopolitan-dinoflagellate-amphidinium-carterae-to-identify-enzymes-with-biotechnological-potential
#2
Chiara Lauritano, Daniele De Luca, Alberto Ferrarini, Carla Avanzato, Andrea Minio, Francesco Esposito, Adrianna Ianora
Dinoflagellates are phytoplanktonic organisms found in both freshwater and marine habitats. They are often studied because related to harmful algal blooms but they are also known to produce bioactive compounds for the treatment of human pathologies. The aim of this study was to sequence the full transcriptome of the dinoflagellate Amphidinium carterae in both nitrogen-starved and -replete culturing conditions (1) to evaluate the response to nitrogen starvation at the transcriptional level, (2) to look for possible polyketide synthases (PKSs) in the studied clone (genes that may be involved in the synthesis of bioactive compounds), (3) if present, to evaluate if nutrient starvation can influence PKS expression, (4) to look for other possible enzymes of biotechnological interest and (5) to test strain cytotoxicity on human cell lines...
September 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28905667/preliminary-pharmacokinetics-of-intravenous-and-subcutaneous-dolasetron-and-pharmacodynamics-of-subcutaneous-dolasetron-in-healthy-cats
#3
Andrea K Herndon, Jessica M Quimby, Liberty G Sieberg, Leigh Davis, Amber L Caress, Sabina Ligas, Ryan J Hansen, Luke A Wittenburg, Danial L Gustafson
Objectives The objectives were to evaluate the pharmacokinetics (PKs) of subcutaneous (SC) and intravenous (IV) dolasetron and the pharmacodynamics (PDs) of SC dolasetron in healthy cats. Methods Five cats with unremarkable complete blood count, serum biochemistry and urinalyses were utilized. In the PK study, cats received 0.8 mg/kg SC and IV dolasetron in a crossover format. Serum samples were obtained via a jugular catheter at 0, 0.25, 0.5, 1, 2, 4, 8, 12, 24, 36 and 48 h after the administration of dolasetron...
September 1, 2017: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/28902510/stereospecific-formation-of-e-and-z-disubstituted-double-bonds-by-dehydratase-domains-from-modules-1-and-2-of-the-fostriecin-polyketide-synthase
#4
Young-Ok You, Dhara D Shah, David E Cane
The dehydratase domain FosDH1 from module 1 of the fostriecin polyketide synthase (PKS) catalyzed the stereospecific interconversion of (3R)-3-hydroxybutyryl-FosACP1 (5) and (E)-2-butenoyl-FosACP1 (11), as established by a combination of direct LC-MS/MS and chiral GC-MS. FosDH1 did not act on either (3S)-3-hydroxybutyryl-FosACP1 (6) or (Z)-2-butenoyl-FosACP1 (12). FosKR2, the ketoreductase from module 2 of the fostriecin PKS that normally provides the natural substrate for FosDH2, was shown to catalyze the NADPH-dependent stereospecific reduction of 3-ketobutyryl-FosACP2 (23) to (3S)-3-hydroxybutyryl-FosACP2 (8)...
September 13, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28881098/identification-and-engineering-of-post-pks-modification-bottlenecks-for-ansamitocin-p-3-titer-improvement-in-actinosynnema-pretiosum-subsp-pretiosum-atcc-31280
#5
Xinjuan Ning, Xinran Wang, Yuanting Wu, Qianjin Kang, Linquan Bai
The type-I polyketide Ansamitocin P-3 (AP-3) is a potent antitumor agent. Its production is most likely hampered by the required multiple substrate supplies and complicated post-PKS modifications in Actinosynnema pretiosum subsp. pretiosum ATCC 31280. For titer improvement, gene ansa30, encoding for a glycosyltransferase competing for the N-demethyl-AP-3 (PND-3) intermediate for AP-3 biosynthesis, was initially inactivated. In the mutant NXJ-22, the AP-3 titer was increased by 66% along with an obvious accumulation of PND-3, indicating that the N-methylation is a rate-limiting step...
September 7, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28868573/phase-i-dose-escalation-and-pharmacokinetic-study-on-the-nanoparticle-formulation-of-polymeric-micellar-paclitaxel-for-injection-in-patients-with-advanced-solid-malignancies
#6
Meiqi Shi, Jing Sun, Jinsong Zhou, Hao Yu, Shaorong Yu, Guohao Xia, Li Wang, Yue Teng, Gangyi Liu, Chen Yu, Yaling Shen, Jifeng Feng
Background Polymeric micellar paclitaxel (PM-paclitaxel) is a novel Cremophor EL-free, nanoparticle-encapsulated paclitaxel formulation administered through intravenous injection. The primary objective of this phase I trial was to determine the first cycle dose-limiting toxicities (DLTs) and maximum tolerated dose (MTD) of PM-paclitaxel. Secondary objectives included the evaluation of the safety, antitumor activity, and pharmacokinetic (PK) profile of PM-paclitaxel in patients with advanced malignancies. Methods The PM-paclitaxel dose was escalated from 175 mg/m(2) (level 1) to 435 mg/m(2) (level 5)...
September 4, 2017: Investigational New Drugs
https://www.readbyqxmd.com/read/28864105/morphine-and-metabolites-plasma-levels-after-administration-of-sustained-release-morphine-in-roux-en-y-gastric-bypass-subjects-versus-matched-control-subjects
#7
Lorry Hachon, Rafael Reis, Laurence Labat, Christine Poitou, Aude Jacob, Xavier Declèves, Celia Lloret-Linares
BACKGROUND: Better knowledge of opioid pharmacology after Roux-en-Y gastric bypass (RYGB) is required for optimizing their use in this growing population. OBJECTIVE: The aim of this case-controlled pharmacokinetic (PK) study was to compare morphine and its glucuronidated metabolites (morphine-3-glucuronide and morphine-6-glucuronide) plasma PKs between patients with RYGB and their controls. SETTINGS: University hospital, Lariboisière Hospital, Paris...
August 3, 2017: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/28860534/genomic-and-transcriptomic-analyses-reveal-differential-regulation-of-diverse-terpenoid-and-polyketides-secondary-metabolites-in-hericium-erinaceus
#8
Juan Chen, Xu Zeng, Yan Long Yang, Yong Mei Xing, Qi Zhang, Jia Mei Li, Ke Ma, Hong Wei Liu, Shun Xing Guo
The lion's mane mushroom Hericium erinaceus is a famous traditional medicinal fungus credited with anti-dementia activity and a producer of cyathane diterpenoid natural products (erinacines) useful against nervous system diseases. To date, few studies have explored the biosynthesis of these compounds, although their chemical synthesis is known. Here, we report the first genome and tanscriptome sequence of the medicinal fungus H. erinaceus. The size of the genome is 39.35 Mb, containing 9895 gene models. The genome of H...
August 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28842846/previously-undescribed-antibacterial-polyketides-from-heterotrophic-bacillus-amyloliquefaciens-associated-with-seaweed-padina-gymnospora
#9
Kajal Chakraborty, Bini Thilakan, Vamshi Krishna Raola
A heterotrophic marine bacterium Bacillus amyloliquefaciens isolated from seaweed Padina gymnospora exhibited broad spectra of antibacterial activities against pathogenic bacteria Aeromonas hydrophila, Vibrio harveyi, Vibrio vulnificus, and Vibrio parahaemolyticus. The seaweed-associated B. amyloliquefaciens was recognized to possess functional type I polyketide synthase-1 (pks-1) gene, and was used to isolate four homologous compounds with polyketide frameworks. The compounds were characterized as 11-(15-butyl-13-ethyl-tetrahydro-12-oxo-2H-pyran-13-yl) propyl-2-methylbenzoate (1), 9-(tetrahydro-12-isopropyl-11-oxofuran-10-yl)-ethyl-4-ethoxy-2-hydroxybenzoate (2), 12-(aminomethyl)-11-hydroxyhexanyl-10-phenylpropanoate (3), and 7-(14-hydroxypropan-13-yl)-8-isobutyl-7,8-dihydrobenzo[c]oxepin-1(3H)-one (4) by comprehensive nuclear magnetic resonance and mass spectroscopic experiments...
August 25, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/28834819/self-retained-amniotic-membrane-combined-with-antiviral-therapy-for-herpetic-epithelial-keratitis
#10
Anny M S Cheng, Scheffer C G Tseng
PURPOSE: To evaluate the therapeutic benefit of self-retained cryopreserved amniotic membrane in conjunction with oral antiviral therapy in herpetic epithelial keratitis. METHODS: Retrospective review of 4 patients with primary (1 eye) and recurrent (3 eyes) unilateral herpetic epithelial keratitis treated with cryopreserved amniotic membrane through the placement of the PROKERA Slim (PKS) (Bio-Tissue, Inc) in conjunction with oral acyclovir. Their symptoms, conjunctival inflammation, corneal staining, and visual acuity were compared before and after treatment...
August 22, 2017: Cornea
https://www.readbyqxmd.com/read/28834212/assessment-of-appropriateness-of-an-initial-dosing-regimen-of-vancomycin-and-development-of-a-new-dosing-nomogram
#11
Seonghae Yoon, Kyoung Ryun Park, SeungHwan Lee, Sang-Hoon Song, Wan Beom Park, In-Jin Jang, Kyung-Sang Yu
Vancomycin is a glycopeptide antibiotic used to treat Gram-positive infections including methicillin-resistant Staphylococcus aureus (MRSA). The objectives of this study were to evaluate the appropriateness of the initial dosing regimen of vancomycin, identify factors to be considered in regimen selection and develop a new dosing nomogram. Therapeutic drug monitoring (TDM) data of vancomycin obtained from Seoul National University Hospital from 2011 to 2013 were included in this analysis. The vancomycin trough concentrations at steady state were estimated using Abbott's PKS software program and then categorized into three levels: subtherapeutic, therapeutic and toxic...
August 20, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28833079/cancer-associated-faecal-microbial-markers-in-colorectal-cancer-detection
#12
Vincy Eklöf, Anna Löfgren-Burström, Carl Zingmark, Sofia Edin, Pär Larsson, Pontus Karling, Oleg Alexeyev, Jörgen Rutegård, Maria L Wikberg, Richard Palmqvist
Colorectal cancer (CRC) is the second most common cause of cancer death in the western world. An effective screening program leading to early detection of disease would severely reduce the mortality of CRC. Alterations in the gut microbiota has been linked to CRC, but the potential of microbial markers for use in CRC screening has been largely unstudied. We used a nested case-control study of 238 study subjects to explore the use of microbial markers for clbA+ bacteria harbouring the pks pathogenicity island, afa-C+ diffusely adherent Escherichia coli harbouring the afa-1 operon, and Fusobacterium nucleatum in stool as potential screening markers for CRC...
August 22, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28832129/the-conformational-flexibility-of-the-acyltransferase-from-the-disorazole-polyketide-synthase-is-revealed-by-an-x-ray-free-electron-laser-using-a-room-temperature-sample-delivery-method-for-serial-crystallography
#13
Irimpan I Mathews, Kim Allison, Thomas Robbins, Artem Y Lyubimov, Monarin Uervirojnangkoorn, Axel T Brunger, Chaitan Khosla, Hasan DeMirci, Scott E McPhillips, Michael Hollenbeck, Michael Soltis, Aina E Cohen
The crystal structure of the trans-acyltransferase (AT) from the disorazole polyketide synthase (PKS) was determined at room temperature to a resolution of 2.5 Å using a new method for the direct delivery of the sample into an X-ray free-electron laser. A novel sample extractor efficiently delivered limited quantities of microcrystals directly from the native crystallization solution into the X-ray beam at room temperature. The AT structure revealed important catalytic features of this core PKS enzyme, including the occurrence of conformational changes around the active site...
August 31, 2017: Biochemistry
https://www.readbyqxmd.com/read/28828718/potential-plasma-lipid-biomarkers-in-early-stage-breast-cancer
#14
Nan Jiang, Guofen Zhang, Lijie Pan, Chengping Yan, Liwei Zhang, Yan Weng, Wenjun Wang, Xianyang Chen, Guoshan Yang
OBJECTIVE: To find new biomarkers for early diagnosis of breast cancer. RESULTS: 847 lipid species were identified from 78 plasma samples (37 breast cancer samples and 41 healthy controls) by ultra HPLC coupled with quadrupole time-of-flight tandem mass spectrometry. These include 321 glycerophospholipids (GPs), 265 glycerolipids (GLs), 91 sphingolipids (SPs), 77 fatty acyls (FAs), 68 sterol lipids (STs), 18 prenol lipids (PRs), 6 polyketides (PKs), and 1 saccharolipid (SL)...
August 21, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/28817927/identification-of-biosynthetic-gene-clusters-from-metagenomic-libraries-using-pptase-complementation-in-a-streptomyces-host
#15
J Kipchirchir Bitok, Christophe Lemetre, Melinda A Ternei, Sean F Brady
The majority of environmental bacteria are not readily cultured in the lab, leaving the natural products they make inaccessible using culture-dependent discovery methods. Cloning and heterologous expression of DNA extracted from environmental samples (environmental DNA, eDNA) provides a means of circumventing this discovery bottleneck. To facilitate the identification of clones containing biosynthetic gene clusters, we developed a model heterologous expression reporter strain Streptomyces albus::bpsA ΔPPTase...
September 1, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28812299/conversion-of-the-high-yield-salinomycin-producer-streptomyces-albus-bk3-25-into-a-surrogate-host-for-polyketide-production
#16
Xiaojie Zhang, Chenyang Lu, Linquan Bai
An ideal surrogate host for heterologous production of various natural products is expected to have efficient nutrient utilization, fast growth, abundant precursors and energy supply, and a pronounced gene expression. Streptomyces albus BK3-25 is a high-yield industrial strain producing type-I polyketide salinomycin, with a unique ability of bean oil utilization. Its potential of being a surrogate host for heterologous production of PKS was engineered and evaluated herein. Firstly, introduction of a three-gene cassette for the biosynthesis of ethylmalonyl-CoA resulted in accumulation of ethylmalonyl-CoA precursor and salinomycin, and subsequent deletion of the salinomycin biosynthetic gene cluster resulted in a host with rich supplies of common polyketide precursors, including malonyl-CoA, methylmalonyl-CoA, and ethylmalonyl-CoA...
August 14, 2017: Science China. Life Sciences
https://www.readbyqxmd.com/read/28805296/basidiomycete-specific-pscamkl1-encoding-a-camk-like-protein-kinase-is-required-for-full-virulence-of-puccinia-striiformis-f-sp-tritici
#17
Min Jiao, Dan Yu, Chenglong Tan, Jia Guo, Dingyun Lan, Ershang Han, Tuo Qi, Ralf Thomas Voegele, Zhensheng Kang, Jun Guo
Calcium/calmodulin-dependent kinases (CaMKs) are Ser/Thr protein kinases (PKs) that respond to changes in cytosolic free Ca(2+) and play diverse roles in eukaryotes. In fungi, CAMKs are generally classified into four families CAMK1, CAMKL, RAD53, and CAMK-Unique. Among these, CAMKL constitutes the largest family. In some fungal plant pathogens members of the CaMKL family have been shown to be responsible for pathogenesis. However, little is known about their role(s) in rust fungi. In this study, we functionally characterized a novel PK gene, PsCaMKL1, from Puccinia striiformis f...
August 14, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28783252/the-polyketide-synthase-ospks2-is-essential-for-pollen-exine-and-ubisch-body-patterning-in-rice
#18
Xiaolei Zhu, Jing Yu, Jianxin Shi, Takayuki Tohge, Alisdair R Fernie, Sagit Meir, Asaph Aharoni, Dawei Xu, Dabing Zhang, Wanqi Liang
Lipid and phenolic metabolism are important for pollen exine formation. In Arabidopsis, polyketide synthases (PKSs) are essential for both sporopollenin biosynthesis and exine formation. Here, we characterized the role of a polyketide synthase (OsPKS2) in male reproduction of rice (Oryza sativa). Recombinant OsPKS2 catalyzed the condensation of fatty acyl-CoA with malonyl-CoA to generate triketide and tetraketide α-pyrones, the main components of pollen exine. Indeed, the ospks2 mutant had defective exine patterning and was male sterile...
August 7, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28746914/a-phase-i-clinical-trial-of-binimetinib-in-combination-with-folfox-in-patients-with-advanced-metastatic-colorectal-cancer-who-failed-prior-standard-therapy
#19
May Cho, Jun Gong, Paul Frankel, Timothy W Synold, Dean Lim, Vincent Chung, Joseph Chao, Daneng Li, Yuan Chen, Stephen Sentovich, Kurt Melstrom, Gagandeep Singh, Eloise Luevanos, Marwan Fakih
BACKGROUND: This was a first in-human, open-label, dose-escalation phase I study conducted to evaluate the maximum tolerated dose (MTD), safety, and efficacy of the combination of oral binimetinib and FOLFOX. MATERIALS AND METHODS: Patients with metastatic colorectal cancer (mCRC) who progressed on prior standard therapies received twice daily binimetinib continuously or intermittently with FOLFOX. Dose-limiting toxicities (DLTs) were assessed in the first 2 cycles of study treatment...
July 18, 2017: Oncotarget
https://www.readbyqxmd.com/read/28745802/progressive-subglottic-stenosis-in-a-child-with-pallister-killian-syndrome
#20
Tadashi Shiohama, Katsunori Fujii, Kenji Shimizu, Hirofumi Ohashi, Tomozumi Takatani, Nobuhiko Okamoto, Gen Nishimura, Mitsuhiro Kato, Naoki Shimojo
Pallister-Killian syndrome (PKS) is rare genetic disorder caused by tetrasomy 12p mosaicism with supernumerary isochromosome 12p that manifests with intellectual disability, craniofacial dysmorphism, and epilepsy. Although PKS presents as a multisystem morphological defect, respiratory system involvement is rare, except for diaphragmatic hernia. We are the first to report a case of PKS with progressive subglottic stenosis. Subglottic stenosis is a potentially lethal condition due to severe respiratory obstruction and difficult intubation; therefore, further accumulation of cases is required to assess the causal link between PKS and subglottic stenosis...
July 26, 2017: Congenital Anomalies
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