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https://www.readbyqxmd.com/read/29120761/complex-formation-between-starch-and-stearic-acid-effect-of-enzymatic-debranching-for-starch
#1
Chagam Koteswara Reddy, So Mang Choi, Dong-Jin Lee, Seung-Taik Lim
Effect of debranching for a high-amylose starch (∼70% amylose) on its V-complex formation with stearic acid was examined. Gel-permeation chromatograms showed that amylopectin was degraded to smaller molecules as the debranching time increased from 6 to 24 h. Increased formation of debranched starch/stearic acid complexes (recovery yield of stearic acid from 45.17 to 89.31% and starch from 39.92 to 55.43%) was observed with increased debranching time (from 6 to 24 h) and complexation time (from 6 to 24 h)...
April 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29101586/a-lariat-derived-circular-rna-is-required-for-plant-development-in-arabidopsis
#2
Jinping Cheng, Yong Zhang, Ziwei Li, Taiyun Wang, Xiaotuo Zhang, Binglian Zheng
Lariat RNA is produced during pre-mRNA splicing, and it is traditionally thought as by-products, due to the quick turnover by debranching followed by degradation. However, recent findings identified many lariat RNAs accumulate with a circular form in higher eukaryotes. Although the remarkable accumulation, biological consequence of lariat-derived circular RNAs (here we name laciRNAs) remains largely unknown. Here, we report that a specific laciRNA from At5g37720 plays an essential role in plant development by regulating gene expression globally...
October 31, 2017: Science China. Life Sciences
https://www.readbyqxmd.com/read/29049788/full-metal-jacket-transfemoral-aortic-valve-implantation-for-regurgitant-valve-after-endovascular-aortic-repair%C3%A2
#3
Omer Tanyeli, Yuksel Dereli, Niyazi Gormus, Mehmet Akif Duzenli
Transfemoral aortic valve implantation has become an almost routine interventional procedure for severe aortic stenosis in high-risk patients. Over time an increased number of experiences has led to unusual procedures. In this report, we present a successful valve-in-valve transfemoral aortic valve implantation in a patient with aortic regurgitation, who previously had debranching and thoracic endovascular aortic repair operations.
July 25, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29049664/acute-type-i-aortic-dissection-a-propensity-matched-comparison-of-elephant-trunk-and-arch-debranching-repairs
#4
Mingjia Ma, Xin Feng, Jing Wang, Yiming Dong, Taiqiang Chen, Ligang Liu, Xiang Wei
OBJECTIVES: Our goal was to compare the performance of the frozen elephant trunk (FET) and the hybrid aortic arch debranching procedures for acute Type I aortic dissection. METHODS: From January 2013 to December 2015, 168 patients with Type I aortic disease underwent ascending aorta and total aortic arch replacement with FET implantation (the FET group, n  = 132) or arch debranching with 1-stage aortic arch exclusion using an endovascular stent in a retrograde manner (the debranching group, n  = 36)...
September 11, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29037665/unit-and-internal-chain-profiles-of-maca-amylopectin
#5
Ling Zhang, Guantian Li, Weirong Yao, Fan Zhu
Unit chain length distributions of amylopectin and its φ, β-limit dextrins, which reflect amylopectin internal structure from three maca starches, were determined by high-performance anion-exchange chromatography with pulsed amperometric detection after debranching, and the samples were compared with maize starch. The amylopectins exhibited average chain lengths ranging from 16.72 to 17.16, with ranges of total internal chain length, external chain length, and internal chain length of the maca amylopectins at 12...
March 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29034019/hybrid-repair-of-an-abdominal-aortic-aneurysm-debranching-with-endovascular-aneurysm-repair-in-a-patient-with-horseshoe-kidney
#6
Keiwa Kin, Hiroshi Takano, Takaya Nakagawa, Yukitoshi Shirakawa
Abdominal aortic aneurysm (AAA) with associated horseshoe kidney (HSK) poses a technical challenge when performing conventional open surgical repair because of possible complications including renal infarction, neuralgia, and collecting system disruption. Endovascular aortic repair (EVAR) is considered the first-line treatment for this pathology, allowing for aneurysm repair without isthmus bisection. However, whether to sacrifice commonly presenting aberrant renal arteries during EVAR is a point of controversy...
March 24, 2017: Annals of Vascular Diseases
https://www.readbyqxmd.com/read/28966086/actin-turnover-in-lamellipodial-fragments
#7
Dikla Raz-Ben Aroush, Noa Ofer, Enas Abu-Shah, Jun Allard, Oleg Krichevsky, Alex Mogilner, Kinneret Keren
Actin turnover is the central driving force underlying lamellipodial motility. The molecular components involved are largely known, and their properties have been studied extensively in vitro. However, a comprehensive picture of actin turnover in vivo is still missing. We focus on fragments from fish epithelial keratocytes, which are essentially stand-alone motile lamellipodia. The geometric simplicity of the fragments and the absence of additional actin structures allow us to characterize the spatiotemporal lamellipodial actin organization with unprecedented detail...
October 9, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28931690/conformational-changes-in-the-5-end-of-the-hiv-1-genome-dependent-on-the-debranching-enzyme-dbr1-during-early-stages-of-infection
#8
Alvaro E Galvis, Hugh E Fisher, Hung Fan, David Camerini
Previous studies in our laboratory showed that the RNA debranching enzyme (DBR1) is not required for early steps in HIV cDNA formation, but is necessary for synthesis of intermediate and late cDNA products. To further characterize this effect, we evaluated the topology of the 5' end of the HIV-1 RNA genome during early infection with and without inhibition of DBR1 synthesis. Cells were transfected with DBR1 shRNA followed 48 hours later by infection with an HIV-1 derived vector containing an RNase H deficient reverse transcriptase...
September 20, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28920634/outcomes-analysis-of-stent-graft-repair-for-thoracic-aorta-emergencies
#9
Mourad Boufi, Florent Vernet, Bianca Dona, Olivier Hartung, Anderson D Loundou, Martine Haccoun, Marc Leone, Yves S Alimi
BACKGROUND: This study aimed to identify patient, pathology and procedure-related factors affecting perioperative and mid-term mortality of thoracic aorta emergencies. METHODS: Between 2007 and 2014, patients treated emergently with thoracic stent-graft were retrospectively reviewed. Variables analyzed were: age, renal insufficiency, shock, cardiac arrest, transfer status, pathology, debranching procedures, operation duration, vascular access and European System for Cardiac Operative Risk Evaluation (EuroSCORE)...
December 2017: Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/28910527/comparative-structural-characterization-of-spiral-dextrin-inclusion-complexes-with-vitamin-e-or-soy-isoflavone
#10
Ping-Ping Wang, Xin-Sheng Qin, Qing-Yu Yang, Zhi-Gang Luo, Zhi-Gang Xiao, Xi-Chun Peng
In this study, the preparation and structural properties of spiral dextrin (SD)/vitamin E and SD/soy isoflavone inclusion complexes were studied. SD was obtained from debranched normal maize starch using isoamylases. After fractionation using a novel method of gradient ethanol precipitation, SD was separated into different fractions, among which SD-40 was found to be the optimal host molecule to prepare SD inclusion complexes with vitamin E or soy isoflavone. X-ray diffraction (XRD) and (13)C cross-polarization magic angle spinning nuclear magnetic resonance (NMR) suggested that the crystalline structures of SD-40/vitamin E and SD-40/soy isoflavone were V6II and V6III types, respectively...
September 25, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28895935/evaluation-of-the-molecular-structural-parameters-of-normal-rice-starch-and-their-relationships-with-its-thermal-and-digestion-properties
#11
Lingshang Lin, Qing Zhang, Long Zhang, Cunxu Wei
The molecular structural parameters of six normal rice starches with different amylose contents were investigated through their iodine absorption spectra and gel permeation chromatography of fully branched and debranched starches. The thermal and digestion properties of starches were also determined and their relationships with molecular structural parameters were analyzed. Results showed that the molecular structural parameters of maximum absorption wavelength, blue value (BV), optical density 620 nm/550 nm (OD 620/550), amylose, intermediate component, and amylopectin, including its short branch-chains, long branch-chains, and branching degree, had high correlation in different determining methods...
September 12, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28888851/long-term-longitudinal-study-of-muscle-function-in-patients-with-glycogen-storage-disease-type-iiia
#12
Valérie Decostre, Pascal Laforêt, Marie De Antonio, Kahina Kachetel, Aurélie Canal, Gwenn Ollivier, Aleksandra Nadaj-Pakleza, François M Petit, Karim Wahbi, Abdallah Fayssoil, Bruno Eymard, Anthony Behin, Philippe Labrune, Jean-Yves Hogrel
Glycogen storage disease type III (GSDIII) is an autosomal recessive disorder caused by mutations in the AGL gene coding for the glycogen debranching enzyme. Current therapy is based on dietary adaptations but new preclinical therapies are emerging. The identification of outcome measures which are sensitive to disease progression becomes critical to assess the efficacy of new treatments in upcoming clinical trials. In order to prepare future longitudinal studies or therapeutic trials with large cohorts, information about disease progression is required...
August 30, 2017: Molecular Genetics and Metabolism
https://www.readbyqxmd.com/read/28887709/mapping-and-comparative-proteomic-analysis-of-the-starch-biosynthetic-pathway-in-rice-by-2d-page-ms
#13
Tao-Shan Chang, Chih-Wei Liu, Yu-Ling Lin, Chao-Yi Li, Arthur Z Wang, Min-Wei Chien, Chang-Sheng Wang, Chien-Chen Lai
Our results not only provide a comprehensive overview of the starch biosynthetic pathway in the developing endosperm but also reveal some important protein markers that regulate the synthesis of starch. In human diets, rice (Oryza sativa L.) is an important source of starch, a substantial amount of which is accumulated in developing endosperm. A better understanding of the complicated pathways involved in starch biosynthesis is needed to improve the yield and quality of rice and other cereal crops through breeding...
September 8, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28873570/effective-production-of-resistant-starch-using-pullulanase-immobilized-onto-magnetic-chitosan-fe3o4-nanoparticles
#14
Jie Long, Bao Zhang, Xingfei Li, Xiaobei Zhan, Xueming Xu, Zhengjun Xie, Zhengyu Jin
In this study, pullulanase was firstly immobilized by covalent bonding onto chitosan/Fe3O4 nanoparticles or encapsulation in sol-gel after bonding onto chitosan/Fe3O4 nanoparticles, and then the immobilized pullulanase was used for the effective production of resistant starch (RS). The highest RS content (35.1%) was obtained under the optimized condition of pH 4.4, enzyme concentration of 10ASPU/g and hydrolysis time of 12h when debranched by free pullulsanase, indicating that RS content was significantly (p<0...
January 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/28868788/constructing-arabinofuranosidases-for-dual-arabinoxylan-debranching-activity
#15
Weijun Wang, Nikola Andric, Cody Sarch, Bruno T Silva, Maija Tenkanen, Emma R Master
Enzymatic conversion of arabinoxylan requires α-L-arabinofuranosidases able to remove α-L-arabinofuranosyl residues (α-L-Araf) from both mono- and double-substituted D-xylopyranosyl residues (Xylp) in xylan (i.e., AXH-m and AXH-d activity). Herein, SthAbf62A (a family GH62 α-L-arabinofuranosidase with AXH-m activity) and BadAbf43A (a family GH43 α-L-arabinofuranosidase with AXH-d3 activity), were fused to create SthAbf62A_BadAbf43A and BadAbf43A_SthAbf62A. Both fusion enzymes displayed dual AXH-m,d and synergistic activity toward native, highly branched wheat arabinoxylan (WAX)...
September 4, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28838513/hybrid-arch-frozen-elephant-trunk-for-persistent-endoleak-after-thoracic-endovascular-aortic-repair
#16
John H Landau, Luc A Dubois, Michael W A Chu
Aneurysms of the distal aortic arch and proximal descending thoracic aorta remain challenging to treat. Whereas thoracic endovascular aortic repair (TEVAR) with arch debranching has provided a more minimally invasive option for patients with such aneurysms, recurrent type Ia endoleaks can be difficult or impossible to treat with further endovascular intervention. We report the successful use of a hybrid arch and frozen elephant trunk graft for the treatment of a patient with a recurrent type Ia endoleak after TEVAR and arch debranching...
September 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28757427/a-debranching-enzyme-isom-of-corallococcus-sp-strain-egb-with-potential-in-starch-processing
#17
Zhoukun Li, Kai Ji, Jie Zhou, Xianfeng Ye, Ting Wang, Xue Luo, Yan Huang, Hui Cao, Zhongli Cui, Yi Kong
Interest in use of resistant starch and maltooligosaccharides as functional foods and biopreservatives has grown in recent years. In this research, a novel debranching enzyme IsoM from Corallococcus sp. strain EGB was identified and expressed in P. pastoris GS115. Sequence alignments showed that IsoM was typical isoamylase with the specific activity up to 70,600U/mg, which belongs to glycoside hydrolase family 13 (GH 13). Enzymatic reaction pattern demonstrated that IsoM has high debranching efficiency against α-1,6-glycosidic bond of branched starch, and exhibited no activity towards α-1,4-glycosidic bond...
December 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28734626/staged-treatment-of-mega-aortic-syndrome-using-the-frozen-elephant-trunk-and-hybrid-thoracoabdominal-repair
#18
Asimakis Gkremoutis, Andreas Zierer, Thomas Schmitz-Rixen, Ali El-Sayed Ahmad, Erhard Kaiser, Michael Keese, Thomas Schmandra
OBJECTIVE: We report our experience with a staged hybrid approach for the treatment of extended aortic disease, also known as "mega aortic syndrome." METHODS: A total of 15 patients (10 male, 5 female) underwent staged repair of the thoracoabdominal aorta, consisting of 3 separate stages (repair of ascending aorta and aortic arch using the frozen elephant trunk technique and hybrid thoracoabdominal repair with debranching of the renovisceral branches and stent graft implantation)...
June 24, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28734431/thoracic-endovascular-aortic-repair-including-total-debranching-on-femoral-artery-for-arch-rupture
#19
Yu Inaba, Tsutomu Ito, Sachiko Hayashi, Tatsuo Takahashi, Takahiko Misumi, Takashi Hachiya, Hideyuki Shimizu
A 94-year-old woman with rupture of a thoracic aortic aneurysm (rTAA) was referred to us. She previously underwent thoracic endovascular aortic repair and was considered to be at high risk for a conventional open operation. Therefore an endovascular procedure was planned. The proximal landing zone needed to be placed at the ascending aorta to seal a type 1a endoleak. A hybrid operation consisting of supraaortic total debranching on the common femoral artery and endovascular repair was performed. All debranched bypasses were patent and the aneurysm was excluded...
August 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28727166/hepatocytes-contribute-to-residual-glucose-production-in-a-mouse-model-for-glycogen-storage-disease-type-ia
#20
Brenda S Hijmans, Andreas Boss, Theo H van Dijk, Maud Soty, Henk Wolters, Elodie Mutel, Albert K Groen, Terry G J Derks, Gilles Mithieux, Arend Heerschap, Dirk-Jan Reijngoud, Fabienne Rajas, Maaike H Oosterveer
It is a longstanding enigma how glycogen storage disease (GSD) type I patients retain a limited capacity for endogenous glucose production (EGP) despite the loss of glucose-6-phosphatase (G6Pase) activity. Insight into the source of residual EGP is of clinical importance given the risk of sudden death in these patients, but so far contradictory mechanisms have been proposed. We investigated G6Pase-independent EGP in hepatocytes isolated from a liver-specific GSD Ia mouse model (L-G6pc(-/-) mice), and performed real-time analysis of hepatic glucose fluxes and glycogen metabolism in L-G6pc(-/-) mice using state-of-the-art stable isotope methodologies...
July 20, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
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