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Glutamine analogs promote cytoophidium assembly in human and Drosophila cells

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Journal of Genetics and Genomics 2011年第9期38卷 391-402页

作者： mr Yilmaz Tastan Zillah Anne Deussen mayte Yu-Yin Siswick Medical Research Council Functional Genomics Unit Department of Physiology Anatomy and GeneticsUniversity of OxfordOxford OXI 3QXUnited Kingdom

CTP synthase is compartmentalized within a subcellular structure,termed the cytoophidium,in a range of organisms including bacteria, yeast,fruit fly and *** we show that CTP synthase is also compartmentalized into cytoophidia in human ***,the occurrence of cytoophidia in human cells increases upon treatment with a glutamine analog 6-diazo-5-oxo-L-norleucine（DON）,an inhibitor of glutamine-dependent enzymes including CTP *** in flies confirmed that DON globally promotes cytoophidium *** analysis via CTP synthase RNA interference in somatic cells indicates that CTP synthase expression level is critical for the formation of ***,DON facilitates cytoophidium assembly even when CTP synthase level is low.A second glutamine analog azaserine also promotes cytoophidum *** data demonstrate that glutamine analogs serve as useful tools in the study of cytoophidia.

关键词： Azaserine CTP synthase Cytoophidium 6-diazo-5-oxo-L-norleucine Drosophila HeLa cell lntracellular compartmentation

Oxidative Degradation of Thermoplastic Starch Induced by UV Radiation

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Journal of Renewable Materials 2019年第4期7卷 383-391页

作者： mayte M.Quispe Olivia V.López Marcelo A.Villar Planta Piloto de Ingeniería Química PLAPIQUI(UNS CONICET)Bahía Blanca(8000)Argentina Departamento de Ingeniería Química Universidad Nacional del Sur(UNS)Bahía Blanca(8000)Argentina

Among biopolymers,thermoplastic starch(TPS)is a good candidate to obtain biomaterials because of its natural origin,biodegradable character,and *** to ultraviolet(UV)radiation causes significant degradation of starch-based materials,inducing photooxidative reactions which result in breaking of polymer chains,production of free radical,and reduction of molar *** changes produce a deterioration of TPS mechanical properties,leading to useless materials after an unpredictable *** this work,changes induced on TPS by UV radiation,analyzing structural properties and mechanical behavior,are *** was obtained through thermo-mechanical processing of native corn starch in the presence of water(45%w/w)and glycerol(30%w/w)as *** were obtained by thermocompression and,before testing,specimens were conditioned to reduce material *** process was performed by exposing TPS to 264 h UV radiation in a weathering test ***’s weight loss was determined *** changes were studied by Fourier Transform Infrared Spectroscopy(FTIR)and morphological modifications were analyzed by Scanning Electron Microscopy(SEM).Reduction of weight average molar mass was measured by Static Light Scattering(SLS).Changes in mechanical properties were studied from tensile *** 96 h exposure,TPS specimens presented a weight reduction of 4-6%,mainly attributed to plasticizers lost by *** observations showed that UV radiation induced morphological changes on TPS,evidenced by an increment of specimens *** FTIR,it was detected the presence of an additional band located at 1726 cm-1 in samples submitted to UV radiation,attributed to the formation of-C=O *** average molar mass of native starch was in the order of 107 g *** exposure to UV radiation decreased significantly its molar mass,confirming molecular degradation of the *** TPS was exposed during 48 h,it

关键词： Thermoplastic starch UV radiation structural properties mechanical behavior

CECRE:Supervision and Control of Spanish Renewable Energies in the Last 15 years

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Journal of Modern Power Systems and Clean Energy 2022年第2期10卷 269-276页

作者： Gema Garcia Platero mayte Garcia Casado Marta Perez Garcia Paula Junco Madero David Alvira Baeza the Red Electrica de Espafia MaridSpain

From its commissioning in 2006 to the present,the Spanish Control Centre for Renewable Energies(CECRE)has been a worldwide pioneer and reference centre in the integration of renewable energies in the electrical *** the last 15 years,CECRE has allowed a high penetration of renewable energies in Spanish electrical system by means of the supervision and control of renewable facilities,while ensuring the power supply *** paper defines the bases of renewable en-ergy operation in CECRE and introduces forecasting systems for renewable ***,this paper describes the participation of renewable energies in balancing services and congestion ***,new challenges for Spanish transmission system operator(TSO)are presented for the integration of renewable energies along with the energy transition and decarbonization.

关键词： Balancing services controllability forecasting system observability Control Centre for Renewable Energies(CECRE) renewable energy photovoltaic(PV) wind.

Contemplative sciences:A future beyond mindfulness

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World Journal of Psychiatry 2021年第4期11卷 87-93页

作者： Javier Garcia-Campayo Yolanda Lopez del Hoyo mayte Navarro-Gil Department of Psychiatry Miguel Servet HospitalAragon Institute for Health ResearchUniversity of ZaragozaZaragoza 50009Spain Department of Psychology and Sociology University of ZaragozaZaragoza 50009Spain

Mindfulness is a psychological technique based on Eastern meditative practices that was developed in the late 1970s by Kabat-Zinn at the University of ***,there was a debate over whether it should be considered a scientific technique or labelled as part of the“new wave”***,mindfulness is omnipresent in modern societies but has suffered from merchandising and banalization,which has been strongly *** some limitations regarding methodological aspects of mindfulness research,it is considered effective for treating many physical and psychological disorders,and even it is recommended in clinical guidelines such the British National Institute for Health and Care *** the last 2500 years,mindfulness practices have moved from Northern India across most of Asia,but their mixing with Western science and culture at the end of the 20^(th)century is considered a key event in recent *** the first time in human history,due to globalization,the wisdom of all contemplative traditions can be shared with all human beings and assessed by *** practices,yoga included,are giving birth to a new field of knowledge,contemplative sciences,which go beyond mindfulness and is devoted to helping humanity to reach higher levels of happiness and mental peace.

关键词： Contemplative sciences Mindfulness Meditation Compassion Psychotherapy Wellness

Nanovesicles Are Secreted during Pollen Germination and Pollen Tube Growth： A Possible Role in Fertilization

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Molecular Plant 2014年第3期7卷 573-577页

作者： Noela Prado Juan de Dios Alche Juan Casado-Vela Salvador Mas mayte Villalba Rosalia Rodriguez Eva Batanero Departamento de Bioquimica y Biologia Molecular Facultad de Qu[mica Universidad Complutense de Madrid 28040 Madrid Spain Departamento de Bioquimica Biologia Celular y Molecular de Plantas Estacion Experimental de1Zaidin (CSIC) E-18080 Granada Spain Spanish National Research Council (CSIC) Spanish National Centre for Biotechnoiogy (CNB) Darwin 3 Cantoblanco 28049 Madrid Spain

Dear Editor, During recent decades, a novel mechanism of secretion has been identified in a wide range of mammalian cells. It involves the release of bioactive membrane nanovesicles （30-100 nm）, termed exosomes, upon the fusion of multivesicular bodies with the plasma membrane （Thery et al., 2009）. Exosomes are implicated in diverse functions, such as scavenging of archaic proteins, intercellular messengers delivering cell-specific signals, and vehicles for transmissible pathogens. Exosomes have also been described in other organisms such as bacte- ria, Drosophila, and fungi.

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Anatomical variation of five plant species along an elevation gradient in Mexico City basin within the Trans-Mexican Volcanic Belt, Mexico

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Journal of Mountain Science 2017年第11期14卷 2182-2199页

作者： P mayte S.JIMéNEZ-NORIEGA Teresa TERRAZAS Lauro LóPEZ-MATA Arturo SáNCHEZ-GONZáLEZ Heike VIBRANS Department of Botany Postgraduate College at Campus Montecillo Institute of Biology Autonomous National University of Mexico Center of Biological Research Autonomous University of State of Hidalgo Mineral de la Reforma

Change in environmental conditions with altitudinal gradients induces morpho-anatomical variations in plants that have been poorly documented in intertropical regions. Five species with three life forms, cryptophyte(Alchemilla procumbens, Geranium seemannii), hemicryptophyte(Acaena elongata, Lupinus montanus), and phanerophyte(Symphoricarpos microphyllus), distributed along an altitudinal gradient in the Sierra Nevada of central Mexico, were studied. The aims were to identify and evaluate their morpho-anatomical modifications under the hypothesis that the sizes of individuals and of their wood and leaf cell types decrease as elevation increases. Three individuals per species per site were collected at seven locations along the altitudinal gradient(2949-3952 m). Their morpho-anatomical characters were analyzed through multiple regression analyses. Elevation was the variable that best explained anatomical changes in the leaf and wood ofthe five species. Canopy density and potassium content in the soil also contributed to explain the variation in anatomical variables along the gradient. As elevation increased a bimodal pattern was observed in various anatomical characters as in the leaf width of A. elongata, A. procumbens and G. seemannii and in the vessel diameter of A. procumbens, G. seemannii, and L. montanus. Other features as the vessel diameter of A. elongata, the fiber length of S. microphyllus, and the ray width of A. elongata increased as the elevation increased. Anatomical traits have a tendency to decrease in size but just toward the end of the gradient, which is probably related to changes in canopy density. The plant response to the altitudinal gradient is more focused on anatomical adaptations than morphological variation; it is also species dependent.

关键词： Altitude Foliar anatomy Mount Tlaloc Wood anatomy Alchemilla procumbens Geraniumseemannii Cryptophyte Bimodal pattern

Clinical characteristics of COVID-19 hospitalized patients associated with mortality:A cohort study in Spain

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Infectious Medicine 2022年第2期1卷 81-87页

作者： Manuel Lozano Adina Iftimi Alvaro Briz-Redon Juanjo Peiró Lara Manyes María Otero mayte Ballester MDolores de las Marinas Juan Carlos Catalá Joséde Andrés Carolina Romero Preventive Medicine and Public Health Food SciencesToxicology and Forensic Medicine DepartmentUniversitat de ValènciaValenciaSpain Epidemiology and Environmental Health Joint Research Unit FISABIO−Universitat Jaume I−Universitat de ValènciaValenciaSpain Department of Statistics and Operations Research University of ValenciaValenciaSpain Statistics Office City Council of ValenciaValenciaSpain Department of Anesthesia Critical Care and Pain UnitUniversity General HospitalValenciaSpain Division of Allergy and Immunology University General HospitalValenciaSpain Anesthesia Unit-Surgical Specialties Department Valencia University Medical SchoolValenciaSpain Division of Research Methodology European UniversityValenciaSpain

Background:The heterogeneity of patients with COVID-19 may explain the wide variation of mortality rate due to the population characteristics,presence of comorbidities and clinical ***:In this study,we analyzed 5342 patients’recordings and selected a cohort of 177 hospitalized patients with a poor prognosis at an early *** assessed during 6 months their symptomatology,coexisting health conditions,clinical measures and health assistance related to *** Cox proportional hazards models were built to identify the associated factors with mortality ***:We observed that cough and kidney failure triplicate the mortality risk and both bilirubin levels and oncologic condition are shown as the most associated with the demise,increasing in four and ten times the risk,*** clinical characteristics such as fever,diabetes mellitus,breathing frequency,neutrophil-lymphocyte ratio,oxygen saturation,and troponin levels,were also related to mortality risk of in-hospital ***:The present study shows that some symptomatology,comorbidities and clinical measures could be the target of prevention tools to improve survival rates.

关键词： COVID-19 SARS-CoV-2 Respiratory insufficiency Mortality Proportional hazard model Pandemics Coronavirus infections Epidemiology

The CircRNAs for Diagnostic, Prognostic, and Therapy in Alzheimer’s Disease

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Advances in Bioscience and Biotechnology 2022年第12期13卷 507-526页

作者： Erika Alejandra Cabrera-Reyes Miguel Ángel Jiménez-Acosta mayte Lizeth Padilla-Cristerna Marco Antonio Meraz-Ríos Department of Molecular Biomedicine Center of Investigation and Advances Studies IPN México City México

The structure and biological function of circular RNAs (circRNAs) in regulating gene expression in a cell is far from known. CircRNAs are unique molecules that contain potent regulatory elements. CircRNAs actively interact with miRNAs (sponging), affecting their regulation and functions. In addition, circRNAs have roles in transcriptional regulation, splicing, and peptide synthesis. With all these properties, circRNAs could play an essential role in diseases, especially Alzheimer’s. Their role in early diagnosis, previous to present symptoms, prognosis associated with neuropathological AD of specific circRNAs, and one of their primary functions is to act as a sponge for miRNAs, which could be a starting point for future gene therapy. This review aims to summarize the current knowledge of these exciting molecules and their potential use as new markers for AD risk. This article will focus on circRNAs deregulated in Alzheimer’s.

关键词： CircRNA Alzheimer’s Disease miRNAs Diagnosis Therapy Dementia

Vascular Loops and Neuro-Otologic Symptoms: Is There Any Correlation?

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International Journal of Otolaryngology and Head & Neck Surgery 2013年第6期2卷 245-247页

作者： Amaya Roldán-Fidalgo Antonio Rodríguez-Valiente Francisco Martín González mayte Pinilla Almudena Trinidad Beatriz Brea álvarez Department of Otorhinolaryngology and Neuroradiology Puerta de Hierro University Hospital Madrid Spain

Objective: To determine the relationship between vascular loops in the internal auditory canal and otologic symptoms. Methods: We performed a retrospective study, with a systematic review of the literature and analyzed the magnetic resonances imaging (MRI) of 91 patients attended in the ENT department since April to June 2013, in order to correlate radiological findings with otologic symptoms. Results: Vascular loops were seen in the internal auditory canal of patients without clinical symptoms;however an association was found between the presence of vascular compression of the eighth nerve displayed on MRI and the presence of sensorineural hearing loss and tinnitus. No association was found between vertigo and vascular loops. Conclusion: The presence of vascular loops in the internal auditory canal may be an incidental finding in MRIs of patients without clinical symptoms. However, in patients with tinnitus or sensorineural hearing loss that is unexplained by other clinical pathologies, these may be correlated with the existence of vascular loops which compress the eighth cranial nerve or contact the bone wall of the internal auditory canal. Further studies involving a larger number of patients are required to accurately evaluate the association between these symptoms and vascular loops.

关键词： Vascular Loop Arterial Loop Internal Auditory Canal Tinnitus Deafness Vertigo