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https://www.readbyqxmd.com/read/29201035/effects-of-epsps-copy-number-variation-cnv-and-glyphosate-application-on-the-aromatic-and-branched-chain-amino-acid-synthesis-pathways-in-amaranthus-palmeri
#1
Manuel Fernández-Escalada, Ainhoa Zulet-González, Miriam Gil-Monreal, Ana Zabalza, Karl Ravet, Todd Gaines, Mercedes Royuela
A key enzyme of the shikimate pathway, 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS; EC 2.5.1.19), is the known target of the widely used herbicide glyphosate. Glyphosate resistance in Amaranthus palmeri, one of the most troublesome weeds in agriculture, has evolved through increased EPSPS gene copy number. The aim of this work was to study the pleiotropic effects of (i) EPSPS increased transcript abundance due to gene copy number variation (CNV) and of (ii) glyphosate application on the aromatic amino acid (AAA) and branched chain amino acid (BCAA) synthesis pathways...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29183996/structural-characterization-of-the-bacterial-proteasome-homolog-bph-reveals-a-tetradecameric-double-ring-complex-with-unique-inner-cavity-properties
#2
Adrian C D Fuchs, Lorena Maldoner, Katharina Hipp, Marcus D Hartmann, Jörg Martin
Eukaryotic and archaeal proteasomes are paradigms for self-compartmentalizing proteases. To a large extent, their function requires the interplay with hexameric ATPases associated with diverse cellular activities (AAA+) that act as substrate unfoldases. Bacteria have various types of self-compartmentalizing proteases; in addition to the proteasome itself, these include the proteasome homolog HslV, which functions together with the AAA+ ATPase HslU; the ClpP protease with its partner AAA+ ATPase ClpX; and Anbu, a recently characterized ancestral proteasome variant...
November 28, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29175038/renin-angiotensin-system-blockade-does-not-attenuate-abdominal-aortic-aneurysm-growth-rupture-rate-or-perioperative-mortality-after-elective-repair
#3
REVIEW
Konrad Salata, Muzammil Syed, Mohamad A Hussain, Rachel Eikelboom, Charles de Mestral, Subodh Verma, Mohammed Al-Omran
OBJECTIVE: The objective of this study was to summarize the literature regarding the effects of renin-angiotensin system blockade (RASB) using angiotensin-converting enzyme inhibitors (ACEis) or angiotensin receptor blockers (ARBs) on human abdominal aortic aneurysm (AAA) growth, rupture, and perioperative mortality. METHODS: We conducted a systematic review in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Our review protocol was registered at the International Prospective Register of Systematic Reviews (CRD42016054082)...
November 23, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29158532/recombinant-decorin-fusion-protein-attenuates-murine-abdominal-aortic-aneurysm-formation-and-rupture
#4
Yue Shen, Valerio Russo, Matthew R Zeglinski, Stephanie L Sellers, Zhengguo Wu, Cameron Oram, Stephanie Santacruz, Yulia Merkulova, Christopher Turner, Keerit Tauh, Hongyan Zhao, Tatjana Bozin, Lubos Bohunek, Haishan Zeng, Michael A Seidman, R Chris Bleackley, Bruce M McManus, Erkki Ruoslahti, Tero A H Järvinen, David J Granville
Decorin (DCN) is a small-leucine rich proteoglycan that mediates collagen fibrillogenesis, organization, and tensile strength. Adventitial DCN is reduced in abdominal aortic aneurysm (AAA) resulting in vessel wall instability thereby predisposing the vessel to rupture. Recombinant DCN fusion protein CAR-DCN was engineered with an extended C-terminus comprised of CAR homing peptide that recognizes inflamed blood vessels and penetrates deep into the vessel wall. In the present study, the role of systemically-administered CAR-DCN in AAA progression and rupture was assessed in a murine model...
November 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29155740/creation-of-a-rodent-model-of-abdominal-aortic-aneurysm-by-blocking-adventitial-vasa-vasorum-perfusion
#5
Hiroki Tanaka, Naoki Unno, Tatsuro Yata, Hirona Kugo, Nobuhiro Zaima, Takeshi Sasaki, Tetsumei Urano
The adventitial vasa vasorum (VV) provides oxygen and nourishment to the aortic wall. Hypoxia in the aortic wall can cause enlarged abdominal aortic aneurysms (AAAs). This article introduces and describes a standard protocol used to induce AAAs through adventitial VV hypoperfusion created with a combination of polyurethane catheter insertion into the aortic lumen and suture ligation of the infrarenal abdominal aorta. The protocol involves the use of male rats weighing 300-400 g, which are provided food and water ad libitum...
November 8, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29149040/a-coap-based-network-access-authentication-service-for-low-power-wide-area-networks-lo-coap-eap
#6
Dan Garcia-Carrillo, Rafael Marin-Lopez, Arunprabhu Kandasamy, Alexander Pelov
The Internet-of-Things (IoT) landscape is expanding with new radio technologies. In addition to the Low-Rate Wireless Personal Area Network (LR-WPAN), the recent set of technologies conforming the so-called Low-Power Wide Area Networks (LP-WAN) offers long-range communications, allowing one to send small pieces of information at a reduced energy cost, which promotes the creation of new IoT applications and services. However, LP-WAN technologies pose new challenges since they have strong limitations in the available bandwidth...
November 17, 2017: Sensors
https://www.readbyqxmd.com/read/29141786/intraluminal-thrombus-is-associated-with-early-rupture-of-abdominal-aortic-aneurysm
#7
Stephen J Haller, Jeffrey D Crawford, Katherine M Courchaine, Colin J Bohannan, Gregory J Landry, Gregory L Moneta, Amir F Azarbal, Sandra Rugonyi
BACKGROUND: The implications of intraluminal thrombus (ILT) in abdominal aortic aneurysm (AAA) are currently unclear. Previous studies have demonstrated that ILT provides a biomechanical advantage by decreasing wall stress, whereas other studies have associated ILT with aortic wall weakening. It is further unclear why some aneurysms rupture at much smaller diameters than others. In this study, we sought to explore the association between ILT and risk of AAA rupture, particularly in small aneurysms...
November 12, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29141546/current-theories-and-clinical-trial-evidence-for-limiting-human-abdominal-aortic-aneurysm-growth
#8
Jing Yu, Shuai Liu, Jianhua Huang, Wei Wang
BACKGROUND: Abdominal aortic aneurysm (AAA) refers to localized dilation of abdominal aorta. AAA is largely asymptomatic, but aneurysmal rupture results in a high mortality rate. AAA with a diameter greater than 55 mm carries a high risk of rupture. There are currently no known medical treatments effective in limiting the growth of small AAA. OBJECTIVE: To review the current status of and challenges faced in limiting AAA growth. METHODS: Data from human investigations and animal model studies were summarized...
November 12, 2017: Current Drug Targets
https://www.readbyqxmd.com/read/29102265/does-elevated-wall-tension-cause-aortic-aneurysm-rupture-investigation-using-a-subject-specific-heterogeneous-model
#9
Timothy K Chung, Erasmo S da Silva, Suresh M L Raghavan
OBJECTIVE: To investigate whether peak wall tension in abdominal aortic aneurysm occurs at the site of rupture to test for a causative relationship. METHODS: Four ruptured and nine unruptured AAA were harvested whole from cadavers, followed by regional measurements of wall thickness, elastic parameters and failure tension. Finite element models were developed with subject-specific load-free AAA morphology and heterogeneous properties interpolated using a geodesic distance weighted approach from the measurements...
October 6, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29097041/comparable-perioperative-mortality-outcomes-in-younger-patients-undergoing-elective-open-and-endovascular-abdominal-aortic-aneurysm-repair
#10
Nathan L Liang, Katherine M Reitz, Michel S Makaroun, Mahmoud B Malas, Edith Tzeng
BACKGROUND: Evidence for benefit of endovascular aneurysm repair (EVAR) over open surgical repair for de novo infrarenal abdominal aortic aneurysms (AAAs) in younger patients remains conflicting because of heterogeneous study populations and small sample sizes. The objective of this study was to compare perioperative and short-term outcomes for EVAR and open surgery in younger patients using a large national disease and procedure-specific data set. METHODS: We identified patients 65 years of age or younger undergoing first-time elective EVAR or open AAA repair from the Vascular Quality Initiative (2003-2014)...
October 30, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28934889/clinical-outcomes-after-endovascular-repair-and-open-surgery-to-treat-immunoglobulin-g4-related-and-nonrelated-inflammatory-abdominal-aortic-aneurysms
#11
Satomi Kasashima, Fuminori Kasashima, Atsuhiro Kawashima, Masamitsu Endo, Yasushi Matsumoto, Kengo Kawakami
PURPOSE: To compare the follow-up results of endovascular aneurysm repair (EVAR) vs open surgery (OS) for inflammatory abdominal aortic aneurysms (IAAAs) with regard to immunoglobulin G4-related diseases (IgG4-RD), which are fibrous inflammatory conditions characterized by elevated serum IgG4 concentrations and numerous infiltrations of IgG4+ plasmacytes. METHODS: Between January 2005 and December 2015, 91 patients were treated with EVAR (begun in 2008) and 166 patients underwent OS for AAA...
December 2017: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/28934100/differences-in-the-movement-skills-and-physical-qualities-of-elite-senior-academy-rugby-league-players
#12
Matthew R E Ireton, Kevin Till, Dan Weaving, Ben Jones
The aim of the present study was to investigate (a) the differences in the movement skills and physical qualities between academy and senior rugby league players, and (b) the relationships between movement skills and physical qualities. Fifty-five male rugby league players (Senior, n=18; Under 19 n=23; Under 16, n=14) undertook a physical testing battery including anthropometric (stature & body mass), strength (isometric mid-thigh pull; IMTP) and power (countermovement jump; CMJ) qualities, alongside the athletic ability assessment (AAA; comprised of overhead squat, double lunge, single-leg Romanian deadlift, press-up and pull-up exercises)...
June 2, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28919439/pih1p-tah1p-puts-a-lid-on-hexameric-aaa-atpases-rvb1-2p
#13
Shaoxiong Tian, Ge Yu, Huan He, Yu Zhao, Peilu Liu, Alan G Marshall, Borries Demeler, Scott M Stagg, Hong Li
The Saccharomyces cerevisiae (Sc) R2TP complex affords an Hsp90-mediated and nucleotide-driven chaperone activity to proteins of small ribonucleoprotein particles (snoRNPs). The current lack of structural information on the ScR2TP complex, however, prevents a mechanistic understanding of this biological process. We characterized the structure of the ScR2TP complex made up of two AAA+ ATPases, Rvb1/2p, and two Hsp90 binding proteins, Tah1p and Pih1p, and its interaction with the snoRNP protein Nop58p by a combination of analytical ultracentrifugation, isothermal titration calorimetry, chemical crosslinking, hydrogen-deuterium exchange, and cryoelectron microscopy methods...
August 24, 2017: Structure
https://www.readbyqxmd.com/read/28916304/rationale-and-design-of-the-arrest-trial-investigating-mesenchymal-stem-cells-in-the-treatment-of-small-aaa
#14
S Keisin Wang, Linden A Green, Ashley R Gutwein, Natalie A Drucker, Raghu L Motaganahalli, Andres Fajardo, Clifford C Babbey, Michael P Murphy
BACKGROUND: Abdominal aortic aneurysms (AAA) are a major source of morbidity and mortality despite continuing advances in surgical technique and care. Although the inciting factors for AAA development continue to be elusive, accumulating evidence suggests a significant peri-aortic inflammatory response leading to degradation and dilation of the aortic wall. Previous human trials have demonstrated safety and efficacy of mesenchymal stem cells (MSCs) in the treatment of inflammation-related pathologies such as rheumatoid arthritis, graft vs host disease, and transplant rejection...
September 12, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28906250/the-aaa-protein-msp1-mediates-clearance-of-excess-tail-anchored-proteins-from-the-peroxisomal-membrane
#15
Nicholas R Weir, Roarke A Kamber, James S Martenson, Vladimir Denic
Msp1 is a conserved AAA ATPase in budding yeast localized to mitochondria where it prevents accumulation of mistargeted tail-anchored (TA) proteins, including the peroxisomal TA protein Pex15. Msp1 also resides on peroxisomes but it remains unknown how native TA proteins on mitochondria and peroxisomes evade Msp1 surveillance. We used live-cell quantitative cell microscopy tools and drug-inducible gene expression to dissect Msp1 function. We found that a small fraction of peroxisomal Pex15, exaggerated by overexpression, is turned over by Msp1...
September 14, 2017: ELife
https://www.readbyqxmd.com/read/28903051/features-of-the-chaperone-cellular-network-revealed-through-systematic-interaction-mapping
#16
Kamran Rizzolo, Jennifer Huen, Ashwani Kumar, Sadhna Phanse, James Vlasblom, Yoshito Kakihara, Hussein A Zeineddine, Zoran Minic, Jamie Snider, Wen Wang, Carles Pons, Thiago V Seraphim, Edgar Erik Boczek, Simon Alberti, Michael Costanzo, Chad L Myers, Igor Stagljar, Charles Boone, Mohan Babu, Walid A Houry
A comprehensive view of molecular chaperone function in the cell was obtained through a systematic global integrative network approach based on physical (protein-protein) and genetic (gene-gene or epistatic) interaction mapping. This allowed us to decipher interactions involving all core chaperones (67) and cochaperones (15) of Saccharomyces cerevisiae. Our analysis revealed the presence of a large chaperone functional supercomplex, which we named the naturally joined (NAJ) chaperone complex, encompassing Hsp40, Hsp70, Hsp90, AAA+, CCT, and small Hsps...
September 12, 2017: Cell Reports
https://www.readbyqxmd.com/read/28888516/effects-of-animal-assisted-activities-on-biobehavioral-stress-responses-in-hospitalized-children-a-randomized-controlled-study
#17
Sandra M Branson, Lisa Boss, Nikhil S Padhye, Thea Trötscher, Alexandra Ward
PURPOSE: This study assessed the effectiveness of animal-assisted activities (AAA) on biobehavioral stress responses (anxiety, positive and negative affect, and salivary cortisol and C-reactive protein [CRP] levels) in hospitalized children. DESIGN AND METHODS: This was a randomized, controlled study. METHOD: Forty-eight participants were randomly assigned to receive a 10-minute AAA (n=24) or a control condition (n=24). Anxiety, positive and negative affect, and levels of salivary biomarkers were assessed before and after the intervention...
September 2017: Journal of Pediatric Nursing
https://www.readbyqxmd.com/read/28876594/salmonella-typhimurium-infected-abdominal-aortic-aneurysm-endovascular-repair-with-secondary-aortoenteric-fistula-formation
#18
M Dickfos, K Garnham, J Jenkins
Endovascular aneurysm repair (EVAR) is a widely accepted and used technique for the treatment of abdominal aortic aneurysms (AAA). However, it comes with a unique set of complications, two of the rarer being infection and aorto-enteric fistula formation. Due to the infrequency of the situation, there are currently no guidelines for their management. A 75-year-old male presented with vague abdominal pain and fevers. He was diagnosed with an infected abdominal aortic EVAR stent graft on computer tomography imaging...
September 2017: South African Journal of Surgery. Suid-Afrikaanse Tydskrif Vir Chirurgie
https://www.readbyqxmd.com/read/28862215/small-field-depth-dose-profile-of-6-mv-photon-beam-in-a-simple-air-water-heterogeneity-combination-a-comparison-between-anisotropic-analytical-algorithm-dose-estimation-with-thermoluminescent-dosimeter-dose-measurement
#19
Abhijit Mandal, Chhape Ram, Ankur Mourya, Navin Singh
AIM OF STUDY: To establish trends of estimation error of dose calculation by anisotropic analytical algorithm (AAA) with respect to dose measured by thermoluminescent dosimeters (TLDs) in air-water heterogeneity for small field size photon. MATERIALS AND METHODS: TLDs were irradiated along the central axis of the photon beam in four different solid water phantom geometries using three small field size single beams. The depth dose profiles were estimated using AAA calculation model for each field sizes...
July 2017: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/28854779/patients-opinions-regarding-research-and-management-of-abdominal-aortic-aneurysms
#20
Regent Lee, Amy Jones, Ismail Cassimjee, Ashok Handa
BACKGROUND: The epidemiology of abdominal aortic aneurysm (AAA) is changing. Outcomes for aortic surgery have improved. Biomarkers of AAA progression are emerging. We recently reported the opinions of international vascular surgery colleagues regarding research and management for AAAs. This study aimed to ascertain a real-world patients' opinion regarding the same questions. METHODS: We administered a survey to patients with AAAs. We first ascertained their views on the priority topics for research in AAA...
August 30, 2017: International Angiology: a Journal of the International Union of Angiology
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