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https://www.readbyqxmd.com/read/28339824/a-phase-i-trial-of-the-mek-inhibitor-selumetinib-azd6244-in-pediatric-patients-with-recurrent-or-refractory-low-grade-glioma-a-pediatric-brain-tumor-consortium-pbtc-study
#1
Anuradha Banerjee, Regina I Jakacki, Arzu Onar-Thomas, Shengjie Wu, Theodore Nicolaides, Tina Young Poussaint, Jason Fangusaro, Joanna Phillips, Arie Perry, David Turner, Michael Prados, Roger J Packer, Ibrahim Qaddoumi, Sridharan Gururangan, Ian F Pollack, Stewart Goldman, Lawrence A Doyle, Clinton F Stewart, James M Boyett, Larry E Kun, Maryam Fouladi
Background.: Activation of the mitogen-activated protein kinase pathway is important for growth of pediatric low-grade gliomas (LGGs). The aim of this study was to determine the recommended phase II dose (RP2D) and the dose-limiting toxicities (DLTs) of the MEK inhibitor selumetinib in children with progressive LGG. Methods.: Selumetinib was administered orally starting at 33 mg/m2/dose b.i.d., using the modified continual reassessment method. Pharmacokinetic analysis was performed during the first course...
February 28, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28333601/simultaneous-occurrence-of-varicella-zoster-virus-induced-pancreatitis-and-hepatitis-in-a-renal-transplant-recipient-a-case-report-and-review-of-literature
#2
Puneet Chhabra, Priyadarshi Ranjan, Deepak K Bhasin
INTRODUCTION: Gastrointestinal complications are common after renal transplantation, including oral lesions, esophagitis, gastritis, diarrhea, and colon carcinoma. The differential diagnosis is difficult in this scenario because multiple factors such as drugs, infections, and preexisting gastrointestinal disease come into play. CASE PRESENTATION: We report a case of varicella zoster virus-induced pancreatitis and hepatitis in a renal transplant recipient. The patient underwent renal transplantation 3 years earlier and now presented with severe pain in the epigastrium radiating to his back and had raised serum lipase levels and skin lesions characteristic of varicella...
2017: Permanente Journal
https://www.readbyqxmd.com/read/28331945/from-a-metagenomic-source-to-a-high-resolution-structure-of-a-novel-alkaline-esterase
#3
Mariana Rangel Pereira, Thaís Carvalho Maester, Gustavo Fernando Mercaldi, Eliana Gertrudes de Macedo Lemos, Marko Hyvönen, Andrea Balan
Esterases catalyze the cleavage and formation of ester bonds and are members of the diverse family of α/β hydrolase fold. They are useful in industries from different sectors, such as food, detergent, fine chemicals, and biofuel production. In a previous work, 30 positive clones for lipolytic activity were identified from a metagenomic library of a microbial consortium specialized in diesel oil degradation. In this study, a putative gene encoding an esterase/lipase, denominated est8, has been cloned and the corresponding protein expressed recombinantly, purified to homogeneity and characterized functional and structurally...
March 22, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28330256/immobilized-lipase-catalyzing-glucose-stearate-synthesis-and-their-surfactant-properties-analysis
#4
A Maria Sebatini, Manisha Jain, P Radha, S Kiruthika, Krishnamurthi Tamilarasan
Sugar fatty acid esters are practical importance and have a variety of applications that include surfactants and as an emulsifying agent. In this study, we report glucose stearate synthesis using lipase-Fe3O4 nanoparticles catalyst. The influence of various reaction factors, such as silica gel concentration, molar ratio of sugar/acid, reaction temperature and speed of agitation on esterification by immobilized enzyme was analyzed. The glucose stearate esterification degree of 87.2 % was obtained under the optimized condition: 1:2 molar ratio of glucose/stearic acid, 2 % (w/v) of silica gel at 120 rpm and 40 °C...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330255/ascorbyl-palmitate-synthesis-in-an-organic-solvent-system-using-a-celite-immobilized-commercial-lipase-lipolase-100l
#5
Shivika Sharma, Kriti Kanwar, Shamsher S Kanwar
Ascorbyl palmitate was synthesized using a Celite-immobilized commercial lipase (Lipolase 100L) in dimethylsulfoxide (DMSO) as an organic solvent system. Lipase immobilized by surface adsorption onto Celite 545 matrix and subsequently exposed to 1 % glutaraldehyde showed 75 % binding of protein. The Celite-bound lipase was optimally active at 75 °C and pH 8.5 under shaking and showed maximum hydrolytic activity toward p-NPP as a substrate. The bound lipase was found to be stimulated only in the presence of Al(3+) and EDTA...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330188/purification-and-characterization-of-a-surfactant-compatible-lipase-from-aspergillus-tamarii-jgif06-exhibiting-energy-efficient-removal-of-oil-stains-from-polycotton-fabric
#6
Arijit Das, Srividya Shivakumar, Sourav Bhattacharya, Sujina Shakya, S S Swathi
An extracellular lipase with 23,666.66 U/ml/min activity was produced by Aspergillus tamarii JGIF06 under submerged fermentation in mineral salt medium containing coconut oil (2.5 % v/v), tryptone (2 % w/v) and ammonium chloride (2 % w/v), with initial pH of 5 ± 0.2, incubated at 25 °C for 7 days on a rotary shaker at 120 rpm. A 7.9-fold increase in lipase-specific activity was recorded after purification by DEAE Sepharose ion exchange and Sephadex G200 column chromatography. The apparent molecular mass of this enzyme was revealed as 50 kDa by sodium dodecyl sulphate polyacrylamide gel electrophoresis...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330118/cloning-expression-purification-and-characterization-of-lipase-from-bacillus-licheniformis-isolated-from-hot-spring-of-himachal-pradesh-india
#7
Gagandeep Kaur, Amninder Singh, Rohit Sharma, Vinay Sharma, Swati Verma, Pushpender K Sharma
In the present investigation, a gene encoding extracellular lipase was cloned from a Bacillus licheniformis. The recombinant protein containing His-tag was expressed as inclusion bodies in Esherichia coli BL21DE3 cells, using pET-23a as expression vector. Expressed protein purified from the inclusion bodies demonstrated ~22 kDa protein band on 12 % SDS-PAGE. It exhibited specific activity of 0.49 U mg(-1) and % yield of 8.58. Interestingly, the lipase displayed activity at wide range of pH and temperature, i...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330115/phylogenetic-and-metabolic-diversity-of-tunisian-forest-wood-degrading-fungi-a-wealth-of-novelties-and-opportunities-for-biotechnology
#8
Dalel Daâssi, Héla Zouari-Mechichi, Lassaad Belbahri, Jorge Barriuso, María Jesús Martínez, Moncef Nasri, Tahar Mechichi
In this study, 51 fungal strains were isolated from decaying wood samples collected from forests located in the Northwest of Tunisia in the vicinity of Bousalem, Ain Draham and Kef. Phylogenetic analysis based on the sequences of the internal transcribed spacers of the ribosomal DNA showed a high diversity among the 51 fungal isolates collection. Representatives of 25 genera and 29 species were identified, most of which were members of one of the following phyla (Ascomycota, Basidiomycota and Zygomycota). In addition to the phylogenetic diversity, a high diversity of secreted enzyme profiles was also detected among the fungal isolates...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330099/thermomyces-lanuginosus-lipase-catalyzed-synthesis-of-natural-flavor-esters-in-a-continuous-flow-microreactor
#9
Ahmad Mohammed Gumel, M S M Annuar
Enzymatic catalysis is considered to be among the most environmental friendly processes for the synthesis of fine chemicals. In this study, lipase from Thermomyces lanuginosus (Lecitase Ultra™) was used to catalyze the synthesis of flavor esters, i.e., methyl butanoate and methyl benzoate by esterification of the acids with methanol in a microfluidic system. Maximum reaction rates of 195 and 115 mM min(-1) corresponding to catalytic efficiencies (k cat/K M) of 0.30 and 0.24 min(-1) mM(-1) as well as yield conversion of 54 and 41 % were observed in methyl butanoate and methyl benzoate synthesis, respectively...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330094/characterization-of-antibiotic-resistant-and-enzyme-producing-bacterial-strains-isolated-from-the-arabian-sea
#10
Preeti N Tallur, Dayanand B Sajjan, Sikandar I Mulla, Manjunatha P Talwar, A Pragasam, Vinayak M Nayak, Harichandra Z Ninnekar, Shivanand S Bhat
Marine bacteria are known to produce many bioactive molecules and extracellular enzymes of commercial importance. We have investigated the bacterial diversity of the coastal area of Karwar, Karnataka State, India. Among these bacterial isolates, five bacterial strains were selected and identified by their morphological, biochemical characteristics and phylogenetic analysis based on 16S rRNA gene sequences. The identified bacterial isolates, Bacillus toyonensis PNTB1, Lysinibacillus sphaericus PTB, Vibrio vulnificus PMD, Shewanella MPTDBS, and Pseudomonas chlororaphis PNTB were characterized for their tolerance to salt and antibiotics...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28327588/pharmacological-inhibition-of-adipose-triglyceride-lipase-corrects-high-fat-diet-induced-insulin-resistance-and-hepatosteatosis-in-mice
#11
Martina Schweiger, Matthias Romauch, Renate Schreiber, Gernot F Grabner, Sabrina Hütter, Petra Kotzbeck, Pia Benedikt, Thomas O Eichmann, Sohsuke Yamada, Oskar Knittelfelder, Clemens Diwoky, Carina Doler, Nicole Mayer, Werner De Cecco, Rolf Breinbauer, Robert Zimmermann, Rudolf Zechner
Elevated circulating fatty acids (FAs) contribute to the development of obesity-associated metabolic complications such as insulin resistance (IR) and non-alcoholic fatty liver disease (NAFLD). Hence, reducing adipose tissue lipolysis to diminish the mobilization of FAs and lower their respective plasma concentrations represents a potential treatment strategy to counteract obesity-associated disorders. Here we show that specific inhibition of adipose triglyceride lipase (Atgl) with the chemical inhibitor, Atglistatin, effectively reduces adipose tissue lipolysis, weight gain, IR and NAFLD in mice fed a high-fat diet...
March 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28327423/characterization-of-an-extracellular-protein-rv1076-from-m-tuberculosis-with-a-potential-role-in-humoral-response
#12
Gurkamaljit Kaur, Bandana Kumari, Jagdeep Kaur
Many mycobacterial proteins involved in lipid metabolism are reported to be essential for survival and pathogenesis of M. tuberculosis. Rv1076 of M. tuberculosis has been annotated as a putative esterase/lipase based on the consensus sequence 'GXSXG'. It is conserved in all the mycobacterial species. Therefore, in the present study we have characterized Rv1076 gene product in detail. The gene rv1076 was expressed in E. coli and purified from inclusion bodies with approx. 40% yield. The protein showed high specific activity with pNP- butyrate as preferred substrate...
March 19, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28327359/regulation-of-secretion-and-enzymatic-activity-of-lipoprotein-lipase-by-c-mannosylation
#13
Sawako Okamoto, Takeyoshi Murano, Takehiro Suzuki, Shiho Uematsu, Yuki Niwa, Yukiko Sasazawa, Naoshi Dohmae, Hideaki Bujo, Siro Simizu
Lipoprotein lipase (LPL) is a crucial enzyme in lipid metabolism and transport, and its enzymatic deficiency causes metabolic disorders, such as hypertriglyceridemia. LPL has one predicted C-mannosylation site at Trp(417). In this study, we demonstrated that LPL is C-mannosylated at Trp(417) by mass spectrometry. Furthermore, by using wild-type and a C-mannosylation-defective mutant of LPL-overexpressing cell lines, we revealed that both secretion efficiency and enzymatic activity of C-mannosylation-defective mutant LPL were lower than those of wild-type...
March 18, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28327211/reduced-fetal-vitamin-d-status-by-maternal-undernutrition-during-discrete-gestational-windows-in-sheep
#14
J K Cleal, M R Hargreaves, K R Poore, J C Y Tang, W D Fraser, M A Hanson, L R Green
Placental transport of vitamin D and other nutrients (e.g. amino acids, fats and glucose) to the fetus is sensitive to maternal and fetal nutritional cues. We studied the effect of maternal calorific restriction on fetal vitamin D status and the placental expression of genes for nutrient transport [aromatic T-type amino acid transporter-1 (TAT-1); triglyceride hydrolase/lipoprotein uptake facilitator lipoprotein lipase (LPL)] and vitamin D homeostasis [CYP27B1; vitamin D receptor (VDR)], and their association with markers of fetal cardiovascular function and skeletal muscle growth...
March 22, 2017: Journal of Developmental Origins of Health and Disease
https://www.readbyqxmd.com/read/28324023/long-chain-free-fatty-acid-receptor-gpr120-mediates-oil-induced-gip-secretion-through-cck-in-male-mice
#15
Akiko Sankoda, Norio Harada, Kanako Iwasaki, Shunsuke Yamane, Yuki Murata, Kimitaka Shibue, Yotsapon Thewjitcharoen, Kazuyo Suzuki, Takanari Harada, Yoshinori Kanemaru, Satoko Shimazu-Kuwahara, Akira Hirasawa, Nobuya Inagaki
Free fatty acid receptors GPR120 and GPR40 are involved in the secretion of gut hormones. GPR120 and GPR40 are expressed in enteroendocrine K-cells and their activation induces the secretion of the incretin glucose-dependent insulinotropic polypeptide (GIP). However, the role of these receptors in fat-induced GIP secretion in vivo and the associated mechanisms are unclear. In this study, we investigated corn oil-induced GIP secretion in GPR120-knockout (GPR120-/-) and GPR40-knockout (GPR40-/-) mice. Oil-induced GIP secretion was reduced by 50% and 80% in GPR120-/- and GPR40-/- mice compared to that in wild-type (WT) mice, respectively...
March 15, 2017: Endocrinology
https://www.readbyqxmd.com/read/28324021/endogenous-calcitonin-gene-related-peptide-regulates-lipid-metabolism-and-energy-homeostasis-in-male-mice
#16
Tian Liu, Akiko Kamiyoshi, Takayuki Sakurai, Yuka Ichikawa-Shindo, Hisaka Kawate, Lei Yang, Megumu Tanaka, Xian Xian, Akira Imai, Liuyu Zhai, Kazutaka Hirabayashi, Kun Dai, Keiya Tanimura, Teng Liu, Nanqi Cui, Kyoko Igarashi, Akihiro Yamauchi, Takayuki Shindo
Calcitonin gene-related peptide (CGRP) is a bioactive peptide produced by alternative splicing of the primary transcript of the calcitonin/CGRP gene. CGRP is largely distributed in the cardiovascular and nervous systems, where it acts as a regulatory factor. CGRP is also expressed in organs and tissues involved in metabolic regulation, including white adipose tissue (WAT), where its function is largely unknown. In this study, we examined the effects of endogenous CGRP on metabolic function. When we administered a high-fat diet to CGRP knockout (CGRP-/-) and wild-type (WT) mice for 10 weeks, we observed that food intake did not differ between the two groups, but body weight and visceral fat weight were significantly lower in CGRP-/- mice...
January 20, 2017: Endocrinology
https://www.readbyqxmd.com/read/28323908/effects-of-protease-and-non-starch-polysaccharide-enzyme-on-performance-digestive-function-activity-and-gene-expression-of-endogenous-enzyme-of-broilers
#17
Lin Yuan, Mingfa Wang, Xiaotu Zhang, Zhixiang Wang
Three hundred one-day-old male broiler chickens (Ross-308) were fed corn-soybean basal diets containing non-starch polysaccharide (NSP) enzyme and different levels of acid protease from 1 to 42 days of age to investigate the effects of exogenous enzymes on growth performance, digestive function, activity of endogenous digestive enzymes in the pancreas and mRNA expression of pancreatic digestive enzymes. For days 1-42, compared to the control chickens, average daily feed intake (ADFI) and average daily gain (ADG) were significantly enhanced by the addition of NSP enzyme in combination with protease supplementation at 40 or 80 mg/kg (p<0...
2017: PloS One
https://www.readbyqxmd.com/read/28323015/simultaneously-achieve-soluble-expression-and-biomimetic-immobilization-of-candida-antarctica-lipase-b-by-introducing-polyamine-tags
#18
Xiaoxue Zhou, Yu Han, Zheng Lv, Xuemei Tian, Han Li, Panpan Xie, Liangyu Zheng
Polyamine tags fused in Candida antarctica lipase B (CalB) can help achieve high soluble expression of CalB in E. coli and can directly mediate silicification, which leads to rapid formation of a CalB-silica particle complex through a one-step approach. After optimization experiments, the fused lipase CalB tagged with 6-histidine at the N terminal and 10-lysine at the C terminal (6His-CalB-10Lys) is effectively expressed with high solubility (0.1mg/mL) and specific activity (10.1U/mg), and easily cross-linked in silica particles with a high immobilization efficiency of 96...
March 16, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28322747/quantitation-of-the-rates-of-hepatic-and-intestinal-cholesterol-synthesis-in-lysosomal-acid-lipase-deficient-mice-before-and-during-treatment-with-ezetimibe
#19
Jen-Chieh Chuang, Adam M Lopez, Stephen D Turley
Esterified cholesterol (EC) and triglycerides, contained within lipoproteins taken up by cells, are hydrolysed by lysosomal acid lipase (LAL) in the late endosomal/lysosomal (E/L) compartment. The resulting unesterified cholesterol (UC) is transported via Niemann-Pick type C2 and C1 into the cytosolic compartment where it enters a putative pool of metabolically active cholesterol that is utilized in accordance with cellular needs. Loss-of-function mutations in LIPA, the gene encoding LAL, result in dramatic increases in tissue concentrations of EC, a hallmark feature of Wolman Disease and Cholesteryl Ester Storage Disease (CESD)...
March 16, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28321925/effects-of-6-months-aerobic-interval-training-on-skeletal-muscle-metabolism-in-middle-aged-metabolic-syndrome-patients
#20
A Guadalupe-Grau, V E Fernández-Elías, J F Ortega, F Dela, J W Helge, R Mora Rodríguez
AIM: Aerobic interval training (AIT) improves the health of metabolic syndrome patients (MetS) more than moderate intensity continuous training. However, AIT has not been shown to reverse all metabolic syndrome risk factors, possibly due to the limited duration of the training programs. PURPOSE: To assess the effects of 6 months of AIT on cardio-metabolic health and muscle metabolism in middle aged MetS. METHODS: Eleven MetS (54.5 ± 0.7 yrs old) underwent 6 month of 3 days a week supervised AIT program on a cycle-ergometer...
March 21, 2017: Scandinavian Journal of Medicine & Science in Sports
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