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https://www.readbyqxmd.com/read/28506892/the-roles-of-the-nuclear-pore-complex-in-cellular-dysfunction-aging-and-disease
#1
REVIEW
Stephen Sakuma, Maximiliano A D'Angelo
The study of the Nuclear Pore Complex (NPC), the proteins that compose it (nucleoporins), and the nucleocytoplasmic transport that it controls has revealed an unexpected layer to pathogenic disease onset and progression. Recent advances in the study of the regulation of NPC composition and function suggest that the precise control of this structure is necessary to prevent diseases from arising or progressing. Here we discuss the role of nucleoporins in a diverse set of diseases, many of which directly or indirectly increase in occurrence and severity as we age, and often shorten the human lifespan...
May 12, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/28505107/raman-spectroscopy-of-head-and-neck-cancer-separation-of-malignant-and-healthy-tissue-using-signatures-outside-the-fingerprint-region
#2
Stephen Holler, Elaina Mansley, Christopher Mazzeo, Michael J Donovan, Maximiliano Sobrero, Brett A Miles
The ability to rapidly and accurately discriminate between healthy and malignant tissue offers surgeons a tool for in vivo analysis that would potentially reduce operating time, facilitate quicker recovery, and improve patient outcomes. To this end, we investigate discrimination between diseased tissue and adjacent healthy controls from patients with head and neck cancer using near-infrared Raman spectroscopy. Our results indicate previously unreported peaks in the Raman spectra that lie outside the conventional "fingerprint" region (400 cm-1-1800 cm -1) played an important role in our analysis and in discriminating between the tissue classes...
May 14, 2017: Biosensors
https://www.readbyqxmd.com/read/28501439/paclitaxel-what-has-been-done-and-the-challenges-remain-ahead
#3
REVIEW
Ezequiel Bernabeu, Maximiliano Cagel, Eduardo Lagomarsino, Marcela Moretton, Diego A Chiappetta
In recent years, the nanotechnology has offered researchers the opportunity to solve the problems caused by the vehicle of the standard and first formulation of paclitaxel (Taxol(®)), while maximizing the proven antineoplastic activity of the drug against many solid tumors. Hence, different types of nanocarriers have been employed to improve the efficacy, safety, physicochemical properties and pharmacokinetic/pharmacodynamic profile of this drug. To date, paclitaxel is the unique drug that is marketed in three different nanoplatforms for its parenteral delivery: polymeric nanoparticles (Abraxane(®)), liposomes (Lipusu(®)), and polymeric micelles (Genexol(®), Nanoxel(®) and Paclical(®))...
May 10, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28500327/metazoan-ribosome-inactivating-protein-encoding-genes-acquired-by-horizontal-gene-transfer
#4
Walter J Lapadula, Paula L Marcet, María L Mascotti, M Virginia Sanchez-Puerta, Maximiliano Juri Ayub
Ribosome inactivating proteins (RIPs) are RNA N-glycosidases that depurinate a specific adenine residue in the conserved sarcin/ricin loop of 28S rRNA. These enzymes are widely distributed among plants and their presence has also been confirmed in several bacterial species. Recently, we reported for the first time in silico evidence of RIP encoding genes in metazoans, in two closely related species of insects: Aedes aegypti and Culex quinquefasciatus. Here, we have experimentally confirmed the presence of these genes in mosquitoes and attempted to unveil their evolutionary history...
May 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28494243/a-rab20-dependent-membrane-trafficking-pathway-controls-m-%C3%A2-tuberculosis-replication-by-regulating-phagosome-spaciousness-and-integrity
#5
Laura Schnettger, Angela Rodgers, Urska Repnik, Rachel P Lai, Gang Pei, Martijn Verdoes, Robert J Wilkinson, Douglas B Young, Maximiliano G Gutierrez
The intracellular pathogen Mycobacterium tuberculosis (Mtb) lives within phagosomes and also disrupts these organelles to access the cytosol. The host pathways and mechanisms that contribute to maintaining Mtb phagosome integrity have not been investigated. Here, we examined the spatiotemporal dynamics of Mtb-containing phagosomes and identified an interferon-gamma-stimulated and Rab20-dependent membrane trafficking pathway in macrophages that maintains Mtb in spacious proteolytic phagolysosomes. This pathway functions to promote endosomal membrane influx in infected macrophages, and is required to preserve Mtb phagosome integrity and control Mtb replication...
May 10, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/28487799/primary-meningococcal-type-c-arthritis-a-case-report-and-literature-review
#6
Maximiliano Barahona, Jaime Catalan, Yoshiro Sato, Jaime Hinzpeter
Acute septic arthritis is a common clinical problem in emergency departments. Primary meningococcal arthritis (PMA) is very rare and few cases are reported in literature. D. B. M. consulted the emergency department for knee pain and fever; analysis showed that the cause was a Neisseria meningitidis type C infection. He received a treatment consisting of 2 arthroscopies and 5 weeks of antibiotics. At five weeks he returned to work and at 2 months he resumed sports (jogging and soccer) without complaints. Primary arthritis of the knee caused by Neisseria meningitidis is very rare...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28467012/age-may-contribute-to-the-increased-frequency-of-axonal-guillain-barr%C3%A3-syndrome
#7
Maximiliano A Hawkes, Miguel Wilken, Gabriel Vázquez, Mauricio F Farez
INTRODUCTION: The frequency of axonal Guillain-Barré syndrome (GBS) varies among countries. Previous studies supporting the high frequency of axonal GBS in South America have been carried out with pediatric populations. We seek to determine the frequency of axonal GBS in both children and adults in South America. METHODS: This is a retrospective cohort analysis of patients who were diagnosed with GBS between January 2006 and December 2013 in a neurological center in Buenos Aires, Argentina...
May 3, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28457273/addition-of-ammonium-based-methacrylates-to-an-experimental-dental-adhesive-for-bonding-metal-brackets-carious-lesion-development-and-bond-strength-after-cariogenic-challenge
#8
Patrícia Layane de Menezes Macedo Nascimento, Carine Tais Welter Meereis, Tamires Timm Maske, Fabrício Aulo Ogliari, Maximiliano Sérgio Cenci, Carmem Sílvia Pfeifer, André Luis Faria-E-Silva
INTRODUCTION: In this study, we evaluated the caries inhibition and shear bond strength achieved with the addition of the antibacterial monomer [2-(Methacryloyloxy)ethyl] trimethylammonium chloride (MADQUAT) to an adhesive used to bond orthodontic brackets. METHODS: Experimental adhesives were formulated with addition of 0% (control), 5%, or 10% MADQUAT followed by measurement of the degree of conversion. These adhesives were used to lute brackets to the enamel of premolars (n = 30)...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28451814/the-relationship-between-manometric-subtype-and-outcomes-of-surgical-treatment-for-patients-with-achalasia-achalasia-manometric-subtypes
#9
Oscar Maximiliano Crespin, Roger Perry Tatum, Keliang Xiao, Ana Valeria Martin, Saurabh Khandelwal, Carlos Alberto Pellegrini, Brant Kurt Oelschlager
BACKGROUND: The Chicago Classification describes three distinct subtypes of achalasia and it appears to be a promising tool in predicting results of treatment with standard Heller Myotomy. The aim of this study is to analyze the outcomes of surgical treatment for achalasia using an extended Heller myotomy for each subtype and to identify additional parameters that may predict the success of therapy. METHODS: 72 consecutive patients with achalasia were evaluated at the University of Washington between 2008 and 2013...
April 27, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28432988/comprehension-of-concrete-and-abstract-words-in-semantic-variant-primary-progressive-aphasia-and-alzheimer-s-disease-a-behavioral-and-neuroimaging-study
#10
Sven Joubert, Guillaume T Vallet, Maxime Montembeault, Mariem Boukadi, Maximiliano A Wilson, Robert Jr Laforce, Isabelle Rouleau, Simona M Brambati
The aim of this study was to investigate the comprehension of concrete, abstract and abstract emotional words in semantic variant primary progressive aphasia (svPPA), Alzheimer's disease (AD), and healthy elderly adults (HE) Three groups of participants (9 svPPA, 12 AD, 11 HE) underwent a general neuropsychological assessment, a similarity judgment task, and structural brain MRI. The three types of words were processed similarly in the group of AD participants. In contrast, patients in the svPPA group were significantly more impaired at processing concrete words than abstract words, while comprehension of abstract emotional words was in between...
April 19, 2017: Brain and Language
https://www.readbyqxmd.com/read/28432720/androgen-receptor-dysfunction-as-a-prevalent-manifestation-in-young-male-carriers-of-a-flna-gene-mutation
#11
Laura Carrera-García, Maximiliano Francisco Rivas-Crespo, María Soledad Fernández García
Androgenic actions require the proper signal transmission by the androgen receptor (AR), a nuclear transcription factor. This is initially located in the cell cytoplasm and should translocates to the nucleus to interact with DNA. AR functional impairment causes diverse blockage degrees of androgenic steroid action, known as androgen insensitivity syndromes. Filamin A, a protein coded by the FLNA gene, is a co-activator of various cytoplasmic factors, including AR. The mutational inactivation of the FLNA gene induces insufficiency of translocation and activation of AR...
April 21, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28427300/object-decision-test-borb-normative-data-for-the-adult-quebec-population-and-performance-in-alzheimer-s-disease-and-the-semantic-variant-of-primary-progressive-aphasia
#12
Alexandre St-Hilaire, Marie-Claude Blackburn, Maximiliano A Wilson, Robert Jr Laforce, Carol Hudon, Joël Macoir
Object decision (OD) test is one subtest of the Birmingham Object Recognition Battery (BORB). It is useful for differential diagnosis among several neurodegenerative diseases. However, normative data provided with this battery count on very few subjects and do not control for the effect of age, which limits interpretability. The purpose of Study 1 was to provide normative data for the OD test of the BORB (version A-hard). The objectives of Study 2 were to establish the diagnostic validity of this task and predictive validity of the normative data in the case of the semantic variant of primary progressive aphasia (svPPA) and Alzheimer's disease (AD)...
April 21, 2017: Neuropsychology, Development, and Cognition. Section B, Aging, Neuropsychology and Cognition
https://www.readbyqxmd.com/read/28424650/the-role-of-the-left-anterior-temporal-lobe-for-unpredictable-and-complex-mappings-in-word-reading
#13
Marilyne Joyal, Simona M Brambati, Robert J Laforce, Maxime Montembeault, Mariem Boukadi, Isabelle Rouleau, Joël Macoir, Sven Joubert, Shirley Fecteau, Maximiliano A Wilson
The anterior temporal lobes (ATLs) have been consistently associated with semantic processing which, in turn, has a key role in reading aloud single words. This study aimed to investigate (1) the reading abilities in patients with the semantic variant of primary progressive aphasia (svPPA), and (2) the relationship between gray matter (GM) volume of the left ATL and word reading performance using voxel-based morphometry (VBM). Three groups of participants (svPPA, Alzheimer's Disease, AD and healthy elderly adults) performed a reading task with exception words, regular words and pseudowords, along with a structural magnetic resonance imaging scan...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28421368/recombinant-foot-and-mouth-disease-virus-fmdv-non-structural-protein-3a-fused-to-enhanced-green-fluorescent-protein-egfp-as-a-candidate-probe-to-identify-fmdv-infected-cattle-in-serosurveys
#14
Cecilia M Lotufo, Ingrid E Bergmann, Nora M Mattion, Maximiliano Wilda, Pablo R Grigera
Recombinant protein 3A-EGFP, a fusion construct between foot-and-mouth disease virus (FMDV) non-structural protein 3A and the enhanced green fluorescent protein (EGFP) was expressed in BL21-DE3 cells. The identity of the partially purified protein 3A-EGFP was confirmed by its reactivity with sera from cattle infected with FMDV and with a monoclonal antibody specific for FMDV-3ABC (MAb3H7) in Western blot assays. No reactivity was observed with sera from uninfected vaccinated animals. The performance of 3A-EGFP as an antigen in an indirect enzyme-linked immunosorbent assay (ELISA) was assessed and compared with that of a previously developed and validated capture ELISA that uses a 3ABC recombinant antigen (3ABC ELISA) and has been widely applied for serological surveys in Argentina...
April 18, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28410957/fetal-alpha-5-reductase-val89leu-mutation-is-associated-with-late-miscarriage
#15
Beatriz Pérez-Nevot, Jose-Luis Royo, Miriam Cortés, Ana M Lendínez, Arturo Reyes-Palomares, Ana-José Jiménez, Maximiliano Ruiz-Galdón, Armando Reyes-Engel
The present study was undertaken to determine the role of different polymorphisms affecting the testosterone/oestrogen pathway in miscarriage. Alpha 5-reductase (SRD5A2) rs523349 and rs9282858, cytochrome P450 aromatase (CYP19A1) rs4646, rs10046 and rs2236722 and oestrogen receptor (ESR1) rs9340799, rs2234693 and rs6932902 polymorphisms were selected. The case group consisted of 94 samples of formalin-fixed and paraffin-embedded fetal tissue from a miscarriage at ≤24 weeks. The control group comprised a population of 331 young healthy subjects...
March 21, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28405810/what-is-the-most-reproducible-classification-system-to-assess-tibial-plateau-fractures
#16
Angélica Millán-Billi, Mireia Gómez-Masdeu, Eduard Ramírez-Bermejo, Maximiliano Ibañez, Pablo Eduardo Gelber
PURPOSE: Traditional classification systems for tibial plateau fractures (TPF) are based on simple radiographs, and intra- and inter-observer variability is low. The aim was to assess intra- and inter-observer variability using traditional systems and some recently described classification systems of TPF in the interpretation of standard radiographs and bidimensional (2D) and tridimensional (3D) computed tomography (CT). METHODS: We studied all patients at two centres who underwent TPF surgery over a three-year period...
April 13, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28403481/do-flow-and-pulsatility-index-within-the-accepted-ranges-predict-long-term-outcomes-after-coronary-artery-bypass-grafting
#17
Maximiliano De Leon, Roberto Stanham, Gerardo Soca, Victor Dayan
Background Transit-time flow measurement (TTFM) is the gold standard for intraoperative detection of graft failure. Several reports show that TTFM and distal coronary bed quality (DCBQ) may also be useful for midterm detection of graft failure. Nonetheless, there are no data regarding their predictive role on long-term outcomes. Methods Patients with three-vessel disease who underwent isolated coronary artery bypass grafting (CABG) in 2006 and received at least one graft to the left anterior descending artery (LAD) or to the first obtuse marginal (OM1) or posterior descending artery (PDA) were included...
April 12, 2017: Thoracic and Cardiovascular Surgeon
https://www.readbyqxmd.com/read/28388824/conservation-strategies-for-understanding-and-combating-the-primate-bushmeat-trade-on-bioko-island-equatorial-guinea
#18
REVIEW
Drew T Cronin, Paul R Sesink Clee, Matthew W Mitchell, Demetrio Bocuma Meñe, David Fernández, Cirilo Riaco, Maximiliano Fero Meñe, Jose Manuel Esara Echube, Gail W Hearn, Mary Katherine Gonder
Bioko Island, Equatorial Guinea is among the important places in Africa for the conservation of primates, but a cultural preference for bushmeat and a lack of effective law enforcement has encouraged commercial bushmeat hunting, threatening the survival of the remaining primate population. For over 13 years, we collected bushmeat market data in the Malabo market, recording over 35,000 primate carcasses, documenting "mardi gras" consumption patterns, seasonal carcass availability, and negative effects resulting from government intervention...
April 7, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28387716/a-study-about-regioisomeric-hydroquinones-with-multiple-intramolecular-hydrogen-bonding
#19
Maximiliano Martínez-Cifuentes, Wilson Cardona, Claudio Saitz, Boris Weiss-López, Ramiro Araya-Maturana
A theoretical exploration about hydrogen bonding in a series of synthetic regioisomeric antitumor tricyclic hydroquinones is presented. The stabilization energy for the intramolecular hydrogen bond (IHB) formation in four structurally different situations were evaluated: (a) IHB between the proton of a phenolic hydroxyl group and an ortho-carbonyl group (forming a six-membered ring); (b) between the oxygen atom of a phenolic hydroxyl group and the proton of an hydroxyalkyl group (seven membered ring); (c) between the proton of a phenolic hydroxyl group with the oxygen atom of the hydroxyl group of a hydroxyalkyl moiety (seven-membered ring); and (d) between the proton of a phenolic hydroxyl group and an oxygen atom directly bonded to the aromatic ring in ortho position (five-membered ring)...
April 7, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28379866/editorial-outcome-measures
#20
R Maximiliano Gómez, Henry Milgrom
No abstract text is available yet for this article.
June 2017: Current Opinion in Allergy and Clinical Immunology
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