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The WAK-like protein RFO1 acts as a sensor of the pectin methylation status in Arabidopsis cell walls to modulate root growth and defense

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Molecular Plant 2023年第5期16卷 865-881页

作者： Apolonio I.Huerta Gloria Sancho-Andre´s Juan Carlos Montesinos Javier Silva-Navas Sole`ne Bassard Corinne Pau-Roblot Christopher Kesten Rudolf Schlechter Susanne Dora Temurkhan Ayupov Je´rome Pelloux^ julia santiago Clara Sa´nchez-Rodrı´guez ETH Zurich Institute of Molecular Plant Biology(D-BIOL)ZurichSwitzerland University of Lausanne Department of Plant Molecular BiologyLausanneSwitzerland UMRT INRAE 1158 BioEcoAgro–BIOPI Biologie des Plantes et Innovation Universite´de Picardie33 Rue St Leu80039 AmiensFrance Present address:Lonza AG VispVisSwitzerland Present address:Institute of Microbiology Freie Universitat BerlinBerlinGermany Present address:Institute of Molecular and Clinical Ophthalmology-Basel BaselSwitzerland Present address:Centro de Biotecnologı´a y Geno´mica de Plantas Universidad Polite´cnica de Madrid(UPM)–Instituto Nacional de Investigacio´n y Tecnologı´a Agraria y Alimentaria(INIA/CSIC)Campus de Montegancedo UPM28223 Pozuelo de Alarco´nSpain

Most organisms adjust their development according to the environmental conditions.For the majority,this implies the sensing of alterations to cell walls caused by different cues.Despite the relevance of this process,few molecular players involved in cell wall sensing are known and characterized.Here,we show that the wall-associated kinase-like protein RESISTANCE TO FUSARIUM OXYSPORUM 1(RFO1)is required for plant growth and early defense against Fusarium oxysporum and functions by sensing changes in the pectin methylation levels in the cell wall.The RFO1 dwell time at the plasma membrane is affected by the pectin methylation status at the cell wall,regulating MITOGEN-ACTIVATED PROTEIN KINASE and gene expression.We show that the extracellular domain of RFO1 binds de-methylated pectin in vitro,whose distribution in the cell wall is altered during F.oxysporum infection.Further analyses also indicate that RFO1 is required for the BR-dependent plant growth alteration in response to inhibition of pectin de-methyl-esterase activity at the cell wall.Collectively,our work demonstrates that RFO1 is a sensor of the pectin methylation status that plays a unique dual role in plant growth and defense against vascular pathogens.

关键词： alterations walls pectin

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Sexual dimorphism in water and nitrogen use strategies in Honckenya peploides: timing matters

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Journal of Plant Ecology 2017年第4期10卷 702-712页

作者： julia Sánchez Vilas Rubén Retuerto Organisms and Environment Division Sir Martin Evans BuildingCardiff School of BiosciencesMuseum AvenueCardiff UniversityCardiff CF103AXUK Departamento de Biología Celular y Ecología Área de EcologíaFacultad de BiologíaUniversidade Santiago de CompostelaCampus VidaRúa de Lope Gómez de Marzoas/n15782 Santiago de CompostelaA CoruñaSpain

Aims Sexes of dimorphic species often differ in ecophysiological traits and display spatial segregation.These differences have been interpreted as an evolved response of the sexes to meet the specific resource demands associated with reproduction.Sexes may differ not only in the amount of resources allocated to reproduction but also in the tim-ing of allocation to reproduction.In this study,we hypothesize that as a consequence of their specific resource demands for reproduction,the sexes of the dune plant Honckenya peploides differ in terms of tempo-ral patterns of water use efficiency and nitrogen use and acquisition.Methods Water use efficiency,as inferred from leaf carbon isotope discrimi-nation(Δ^(13)C),nitrogen use,estimated by leaf nitrogen isotope com-position(δ^(15)N),and the foliar carbon and nitrogen contents were measured in males and females at three different points in time.Important Findings Females had greater water use efficiency than males,regardless of time.The ratio of N^(15) to N^(14) did not change with time in males,but significantly decreased in August for females.The total N content in the leaf tissues of females decreased as the season progressed,while in males a decrease was only found from April to June and then it remained constant from June to August.A similar pattern,but reversed,was followed by the foliar C/N ratio.Additionally,nega-tive relationships between leafΔ^(13)C and N content were found at all times for males and only at the end of the season for females.Thus,our hypothesis that sex-specific patterns of nitrogen and water use efficiency will depend on time was supported.Overall,our results highlight the importance of including time in studies of sex-ual dimorphism,and also the role that physiological specialization plays in meeting the specific demands associated with reproduction.

关键词： cost of reproduction Honckenya peploides leaf nitrogen content sexual dimorphism stable isotopes water use efficiency

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Understanding Chemical Reactivity in Extended Systems：Exploring Models of Chemical Softness in Carbon Nanotubes

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物理化学学报 2018年第6期34卷 631-638页

作者： CáRDENAS Carlos MUNOZ Macarena CONTRERAS julia AYERS Paul W. GóMEZ Tatiana FUENTEALBA Patricio Departamento de Flsica Facultad de Ciencias Universidad de Chile Casilla 653 Santiago Chile Centro para el Desarrollo de la Nanociencias y Nanotecnologia CEDENNA Avenida Ecuador 3493 Santiago Chile Nucleo de Matematicas Fisica y Estad

Chemical reactivity towards electron transfer is captured by the Fukui function.However,this is not well defined when the system or its ions have degenerate or pseudo-degenerate ground states.In such a case,the first-order chemical response is not independent of the perturbation and the correct response has to be computed using the mathematical formalism of perturbation theory for degenerate states.Spatialpseudo-degeneracy is ubiquitous in nanostructures with high symmetry and totally extended systems.Given the size of these systems,using degenerate-state perturbation theory is impractical because it requires the calculation of many excited states.Here we present an alternative to compute the chemical response of extended systems using models of local softness in terms of the local density of states.The local softness is approximately equal to the density of states at the Fermi level.However,such approximation leaves out the contribution of inner states.In order to include and weight the contribution of the states around the Fermi level,a model inspired by the long-range behavior of the local softness is presented.Single wall capped carbon nanotubes(SWCCNT) illustrate the limitation of the frontier orbital theory in extended systems.Thus,we have used a C360 SWCCNT to test the proposed model and how it compares with available models based on the local density of states.Interestingly,a simple Hü ckel approximation captures the main features of chemical response of these systems.Our results suggest that density-of-states models of the softness along simple tight binding Hamiltonians could be used to explore the chemical reactivity of more complex system,such a surfaces and nanoparticles.

关键词： Local softness Fukui function Reactivity Carbon nanotubes Density of states

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The body mass index (BMI) as a public health tool to predict metabolic syndrome

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Open Journal of Preventive Medicine 2012年第1期2卷 59-66页

作者： Miguel Murguía-Romero Rafael Jiménez-Flores Rafael Villalobos-Molina María Isabel Mendoza-Ramos julia Reyes-Reali santiago C. Sigrist-Flores Adolfo René Méndez-Cruz Carrera de Médico Cirujano FES Iztacala UNAM Tlalnepantla México

Objective: To analyze the body mass index (BMI) as an indicator of metabolic alterations, including the metabolic syndrome (MetS), at both individual level and public health level. Method: We recruited 3683 undergraduate students (17 - 24 years old) from México City identifying metabolic alterations, including the MetS, and comparing its prevalence by BMI ranges. We applied a sensitivity analysis to define BMI optimal cut-off point values. Results: We found 14.6% of MetS prevalence with a BMI average of 24.2%, and 34.5% of overweight prevalence (BMI ≥ 25). A BMI cut-off point value of 22.5 is suggested as an upper limit of a normal weight condition, only for public health purpose;while at individual level the BMI cut-off point of 25 was corroborated as the upper limit for a normal weight condition. A public health tool to estimate the MetS prevalence based on BMI percentages is proposed, and a study case is presented. Conclusion: BMI fails predicting at individual level both, healthy condition or metabolic alterations, when values are lower than 25. At population level, the BMI is a valuable public health tool to estimate MetS prevalence: based on the prevalence of MetS by BMI ranges of a sample of the population.

关键词： BMI Metabolic Syndrome Obesity Public Health Tool

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Social media in cardiology:Reasons to learn how to use it

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World Journal of Cardiology 2019年第10期11卷 217-220页

作者： Rafael Vidal-Perez Jose Juan Gómez de Diego julia Grapsa Ricardo Fontes-Carvalho Jose Ramon Gonzalez-Juanatey Heart Failure Unit Cardiology DepartmentHospital Clinico Universitario de SantiagoSantiago de Compostela 15706A CorunaSpain Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares SpainSantiago de Compostela 15706A CorunaSpain Cardiovascular Institute Hospital Universitario San CarlosMadrid 28040Spain Cardiology Department St Bartholomew HospitalBarts Health TrustLondon EC1A 7BEUnited Kingdom Cardiology Department Centro Hospitalar GaiaUniversity of PortoPorto 4434-502Portugal

Social media has changed the way we learn,educate,and interact with our peers.The dynamic nature of social media and their immediate availability through our portable devices(smartphones,tablets,smartwatches,etc.)is quickly transforming the way we participate in society.The scope of these digital tools is broad as they deal with many different aspects:Teaching and learning,case discussion,congresses coverage,peer to peer interaction,research are examples worth mentioning.The scientific societies considered more innovative,are promoting these tools between their members.These new concepts need to be known by the cardiologists to stay updated,as countless information is moving rapidly through these channels.We summarize the main reasons why learning how to use these tools to be part of the conversation is essential for the cardiologist in training or fully stablished.

关键词： Social media Cardiology Congress Learning Teaching Interaction Cardiovascular diseases Impact Factor Portable devices Smartphone Tablet

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Composition of Cachacas Produced from Five Varieties of Sugarcane and the Correlation of the Presence of Dhurrin in the Cane with That of Ethyl Carbamate in the Product

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American Journal of Plant Sciences 2019年第2期10卷 339-350页

作者： Francielli D’Carlos Cravo Wilder Douglas santiago Allan da Silva Lunguinho Richard Bispo Barbosa Renan Elan da Silva Oliveira Gabriela Fontes Alvarenga Stephano Daniel Santos Rafaella Hilda Zaniti Souza Ellen Cristina de Souza Katia julia de Almeida Josefina Aparecida de Souza David Lee Nelson Maria das Gracas Cardoso Department of Food Science Federal University of LavrasC.P.LavrasMinas GeraisBrazil Department of Chemistry Federal University of LavrasC.P.LavrasMinas GeraisBrazil Pro-Reitoria de Pesquisa e Pos-Graduacao Federal University of Vales de Jequitinhonha and MucuriDiamantinaMGBrazil

The present work sought to characterize the cyanogenic glycoside dhurrin in five sugarcane varieties and to determine its possible relationship with the formation of ethyl carbamate in cachaca. For each variety, methanol, ethyl acetate and hexane extracts were prepared and submitted to thin layer chromatography. Chromatographic spots were revealed with iodine vapors. The physical and chemical parameters of the spirits produced from the five different varieties of sugar cane and by different production processes were within the legal limits. Although not exceeding the limit for ethyl carbamate, a significant variation in the final concentration of this compound was observed for each sample analyzed. The Rf values for the dhurrin standard and for the sugarcane variety SP 83-2847 were equal, similar to those for SP 80-3280 and CTC 11 and different from the Rf values for the RB 86-7515 and IAC 86-2480 samples.

关键词： Cachaca Ethyl Carbamate Quality Glycosides Cyanide Dhurrin

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通过手术导致的重量损失由胃绕过在疾病的肥胖的病人改进非含酒精的脂肪肝疾病

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World Journal of Hepatology 2012年第12期4卷 382-388页

作者： Víctor Vargas Helena Allende Albert Lecube Maria Teresa Salcedo Juan A Baena-Fustegueras José M Fort Joaquín Rivero Roser Ferrer Roberto Catalán Eva Pardina santiago Ramón y Cajal Jaime Guardia julia Peinado-Onsurbe Liver Unit Department of MedicineHospital Vall d’HebronUniversitat Autònoma08028 BarcelonaSpain CIBER de Enfermedades Hepáticas y Digestivas Instituto de Salud Carlos Ⅲ28029 MadridSpain Department of Pathology Hospital Vall d’HebronUniversitat Autònoma08035 BarcelonaSpain Endocrinology Service Hospital Vall d’HebronUniversitat Autònoma08035 BarcelonaSpain Diabetes Research Unit CIBER de Diabetes y Enfermedades Metabólicas AsociadasInstituto de Salud Carlos Ⅲ28029 MadridSpain Department of Surgery Hospital Arnau de VilanovaLleida25198 BarcelonaSpain Department of Surgery Mútua de Terrassa08221 BarcelonaSpain Biochemistry and Hormones Hospital Vall d’HebronUniversitat Autònoma08035 BarcelonaSpain Biochemistry and Molecular Biology Department Biology FacultyBarcelona University08028 BarcelonaSpain

AIM:To evaluate the effects of surgical weight loss(Roux-en-Y gastric bypass with a modified Fobi-Capella technique) on non alcoholic fatty liver disease in obese patients.METHODS:A group of 26 morbidly obese patients aged 45 ± 2 years and with a body mass index > 40 kg/m 2 who underwent open surgical weight loss operations had paired liver biopsies,the first at surgery and the second after 16 ± 3 mo of weight loss.Biopsies were evaluated and compared in a blinded fashion.The presence of metabolic syndrome,anthropometric and biochemical variables were also assessed at baseline and at the time of the second biopsy.RESULTS:Percentage of excess weight loss was 72.1% ± 6.6%.There was a reduction in prevalence of metabolic syndrome from 57.7%(15 patients) to 7.7%(2 patients)(P 1) was present in five patients at second biopsy.Steatosis and fibrosis at surgery were predictors of significant fibrosis postsurgery.CONCLUSION:Restrictive mildly malabsorptive surgery provides significant weight loss,resolution of metabolic syndrome and associated abnormal liver histological features in most obese patients.

关键词： Non alcoholic fatty liver disease Bariatric surgery Obesity Non alcoholic steatohepatitis

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Myocardial infarction with non-obstructive coronary arteries: A comprehensive review and future research directions

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World Journal of Cardiology 2019年第12期11卷 305-315页

作者： Rafael Vidal-Perez Charigan Abou Jokh Casas Rosa Maria Agra-Bermejo Belén Alvarez-Alvarez julia Grapsa Ricardo Fontes-Carvalho Pedro Rigueiro Veloso Jose Maria Garcia Acuña Jose Ramon Gonzalez-Juanatey Cardiology Department Hospital Clinico Universitario de SantiagoSantiago de Compostela 15706Spain Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares(CIBERCV) Santiago de Compostela 15706Spain Cardiology Department St Bartholomew HospitalBarts Health TrustLondon EC1A 7BEUnited Kingdom Cardiology Department Centro Hospitalar GaiaVila Nova Gaia 4434-502Portugal Faculty of Medicine University of Porto Porto 4200-319Portugal

Acute coronary syndromes constitute a variety of myocardial injury presentations that include a subset of patients presenting with myocardial infarction with non-obstructive coronary arteries(MINOCA).This acute coronary syndrome differs from type 1 myocardial infarction(MI)regarding patient characteristics,presentation,physiopathology,management,treatment,and prognosis.Two-thirds of MINOCA subjects present ST-segment elevation;MINOCA patients are younger,are more often female and tend to have fewer cardiovascular risk factors.Moreover,MINOCA is a working diagnosis,and defining the aetiologic mechanism is relevant because it affects patient care and prognosis.In the absence of relevant coronary artery disease,myocardial ischaemia might be triggered by an acute event in epicardial coronary arteries,coronary microcirculation,or both.Epicardial causes of MINOCA include coronary plaque disruption,coronary dissection,and coronary spasm.Microvascular MINOCA mechanisms involve microvascular coronary spasm,takotsubo syndrome(TTS),myocarditis,and coronary thromboembolism.Coronary angiography with non-significant coronary stenosis and left ventriculography are first-line tests in the differential study of MINOCA patients.The diagnostic arsenal includes invasive and non-invasive techniques.Medical history and echocardiography can help indicate vasospasm or thrombosis,if one finite coronary territory is affected,or specify TTS if apical ballooning is present.Intravascular ultrasound,optical coherence tomography,and provocative testing are encouraged.Cardiac magnetic resonance is a cornerstone in myocarditis diagnosis.MINOCA is not a benign diagnosis,and its polymorphic forms differ in prognosis.MINOCA care varies across centres,and future multi-centre clinical trials with standardized criteria may have a positive impact on defining optimal cardiovascular care for MINOCA patients.

关键词： Myocardial infarction Non-obstructive coronary Myocardial infarction with non-obstructive coronary arteries Management Prognosis

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克罗恩病患者回结肠切除一期吻合手术的围手术期处理和术后近期并发症:对PRACTICROHN研究的数据分析

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Gastroenterology Report 2019年第3期7卷 168-175,I0001,I0002页

作者： Ana Gutierrez Montserrat Rivero Maria Dolores Martin-Arranz Valle Garcia Sanchez Manuel Castro Jesus Barrio Ruth de Francisco Manuel Barreiro-de Acosta Berta julia Luis Cea-Calvo Cristina Romero Natalia Borruel Sainz Eugeni Domenech Gastroenterology Department General University Hospital of Alicante and Centro de Investigacion Biomedica en Red de Enfermedades Hepaticas y Digestivas(CIBERehd)CarlosⅢHealth InstituteMadridSpain Gastroenterology Department Marques de Valdecilla General University HospitalSantanderSpain Gastroenterology Department La Paz General University HospitalInstituto de Investigacion Biomedica La Paz(IdiPaz)MadridSpain Clinical Management of Gastrointestinal Tract Diseases Unit Reina Sofia University HospitalMaimonides Institute of Biomedical Research of Cordoba(IMIBIC)Cordoba UniversityCordobaSpain Gastroenterology Department Valme University HospitalSevillaSpain Gastroenterology Department University HospitalRio HortegaValladolidSpain Gastroenterology Department University Hospital Central de AsturiasOviedoSpain Gastroenterology Department Inflammatory Bowel Disease UnitUniversity Hospital Complex of Santiago de CompostelaSantiago de CompostelaSpain Medical Department Merck Sharp and DohmeMadridSpain Crohn-Colitis Care Unit(UACC) Digestive Tract ServiceHospital Universitari Vall d’HebronBarcelonaSpain Gastroenterology Department Germans Trias i Pujol University Hospital and CIBERehdBadalonaSpain

背景:本研究旨在分析克罗恩病患者回结肠切除术后近期并发症的发生率及危险因素。方法:对PRACTICROHN研究队列进行回顾性分析,纳入2007年1月至2010年12月间行回结肠切除一期吻合的成人克罗恩病患者。术后近期并发症定义为术后30天内出... 详细信息

背景:本研究旨在分析克罗恩病患者回结肠切除术后近期并发症的发生率及危险因素。方法:对PRACTICROHN研究队列进行回顾性分析,纳入2007年1月至2010年12月间行回结肠切除一期吻合的成人克罗恩病患者。术后近期并发症定义为术后30天内出现的并发症,包括死亡、肠梗阻、吻合口漏、消化道出血、腹腔脓肿、切口感染、导管相关感染及其他腹腔外感染。结果:364例患者纳入分析,手术时患者的中位年龄38岁,男性占50%。手术适应证:狭窄型占46.4%,穿透型占31.3%,狭窄+穿透型占14.0%,药物难治性占5.8%。100例(27.5%)出现术后近期并发症,其中切口感染、腹腔脓肿和吻合口漏最为常见。出现并发症的患者其中位住院时间较未出现并发症者显著延长(16 vs 9天,P<0.001)。术后并发症更多发生于穿透型病变(36/114,31.6%)和药物难治性(9/21,42.9%)患者,而狭窄型(45/169,26.6%)和狭窄+穿透型(6/51,11.8%)患者并发症发生率相对较低(P=0.040)。术中才作出诊断的患者,术后并发症发生率较术前已明确诊断者显著升高[48.4%(15/31)vs.25.7%(85/331),P=0.013)。手术期间接受药物治疗并不会影响并发症发生率。结论:约四分之一的克罗恩病患者行回结肠切除术后会出现近期并发症,其中穿透型病变和急诊手术患者术后并发症风险增高。

关键词： Ileocolonic resection Crohn’s disease post-operative complications risk factors

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Dendritic cell deficiencies persist seven months after SARS-CoV-2 infection

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Cellular & Molecular Immunology 2021年第9期18卷 2128-2139页

作者： Alberto Pérez-Gómez Joana Vitallé Carmen Gasca-Capote Alicia Gutierrez-Valencia María Trujillo-Rodriguez Ana Serna-Gallego Esperanza Muñoz-Muela María de los Reyes Jiménez-Leon Mohamed Rafii-El-Idrissi Benhnia Inmaculada Rivas-Jeremias Cesar Sotomayor Cristina Roca-Oporto Nuria Espinosa Carmen Infante-Domínguez Juan Carlos Crespo-Rivas Alberto Fernández-Villar Alexandre Pérez-González Luis Fernando López-Cortés Eva Poveda Ezequiel Ruiz-Mateos JoséMiguel Cisneros Sonsoles Salto-Alejandre Judith Berastegui-Cabrera Pedro Camacho-Martínez Carmen Infante-Domínguez Marta Carretero-Ledesma Juan Carlos Crespo-Rivas Eduardo Márquez JoséManuel Lomas Claudio Bueno Rosario Amaya JoséAntonio Lepe Jerónimo Pachón Elisa Cordero Javier Sánchez-Céspedes Manuela Aguilar-Guisado Almudena Aguilera Clara Aguilera Teresa Aldabo-Pallas Verónica Alfaro-Lara Cristina Amodeo Javier Ampuero María Dolores Avilés Maribel Asensio Bosco Barón-Franco Lydia Barrera-Pulido Rafael Bellido-Alba Máximo Bernabeu-Wittel Candela Caballero-Eraso Macarena Cabrera Enrique Calderón Jesús Carbajal-Guerrero Manuela Cid-Cumplido Yael Corcia-Palomo Juan Delgado Antonio Domínguez-Petit Alejandro Deniz Reginal Dusseck-Brutus Ana Escoresca-Ortega Fátima Espinosa Nuria Espinosa Michelle Espinoza Carmen Ferrándiz-Millón Marta Ferrer Teresa Ferrer Ignacio Gallego-Texeira Rosa Gámez-Mancera Emilio García Horacio García-Delgado Manuel García-Gutiérrez María Luisa Gascón-Castillo Aurora González-Estrada Demetrio González Carmen Gómez-González Rocío González-León Carmen Grande-Cabrerizo Sonia Gutiérrez Carlos Hernández-Quiles Inmaculada Concepción Herrera-Melero Marta Herrero-Romero Luis Jara Carlos Jiménez-Juan Silvia Jiménez-Jorge Mercedes Jiménez-Sánchez julia Lanseros-Tenllado Carmina López Isabel López Álvaro López-Barrios Luis F.López-Cortés Rafael Luque-Márquez Daniel Macías-García Guillermo Martín-Gutiérrez Luis Martín-Villén JoséMolina Aurora Morillo María Dolores Navarro-Amuedo Dolores Nieto-Martín Francisco Ortega María Paniagua-García Amelia Peña-Rodríguez E Clinical Unit of Infectious Diseases Microbiology and Preventive MedicineInstitute of Biomedicine of Seville(IBiS)Virgen del Rocío University HospitalCSICUniversity of SevilleSevilleSpain Department of Medical Biochemistry Molecular Biologyand ImmunologySchool of MedicineUniversity of SevilleSevilleSpain Pneumology Service Galicia Sur Health Research Instituto(IIS Galicia Sur)SERGAS-UVigoVigoSpain Infectious Diseases Unit Department of Internal MedicineComplexo HospitalarioUniversitario de VigoIIS Galicia SurSERGAS-UVigoVigoSpain Group of Virology and Pathogenesis Galicia Sur Health Research Institute(IIS Galicia Sur)-Complexo Hospitalario Universitario de VigoSERGAS-UVigoVigoSpain Unit of Infectious Diseases Microbiologyand Preventive MedicineVirgen del Rocío University HospitalSevilleSpain Institute of Biomedicine of Seville(IBiS) Virgen del Rocío University Hospital/CSIC/University of SevilleSevilleSpain Medico-Surgical Unit of Respiratory Diseases Virgen del Rocío University HospitalSevilleSpain Unit of Emergencies Virgen del Rocío University HospitalSevilleSpain Intensive Care Unit Virgen del Rocío University HospitalSevilleSpain Department of Medicine University of SevilleSevilleSpain Cardiology and Cardiovascular Surgery Unit Virgen del Rocío University HospitalSevilleSpain Rheumatology Unit Virgen del Rocío University HospitalSevilleSpain Internal Medicine Unit Virgen del Rocío University HospitalSevilleSpain Digestive and Hepatobiliary Unit Virgen del Rocío University HospitalSevilleSpain Neurology and Clinical Neurophysiology Unit Virgen del Rocío University HospitalSevilleSpain Endocrinology and Nutrition Unit Virgen del Rocío University HospitalSevilleSpain Urology and Nephrology Unit Virgen del Rocío University HospitalSevilleSpain Unit of Clinical Investigation and Clinical Trials Virgen del Rocío University HospitalSevilleSpain

Severe Acute Respiratory Syndrome Coronavirus(SARS-CoV)-2 infection induces an exacerbated inflammation driven by innate immunity components.Dendritic cells(DCs)play a key role in the defense against viral infections,for instance plasmacytoid DCs(pDCs),have the capacity to produce vast amounts of interferon-alpha(IFN-α).In COVID-19 there is a deficit in DC numbers and IFN-αproduction,which has been associated with disease severity.In this work,we described that in addition to the DC deficiency,several DC activation and homing markers were altered in acute COVID-19 patients,which were associated with multiple inflammatory markers.Remarkably,previously hospitalized and nonhospitalized patients remained with decreased numbers of CD1c+myeloid DCs and pDCs seven months after SARS-CoV-2 infection.Moreover,the expression of DC markers such as CD86 and CD4 were only restored in previously nonhospitalized patients,while no restoration of integrinβ7 and indoleamine 2,3-dyoxigenase(IDO)levels were observed.These findings contribute to a better understanding of the immunological sequelae of COVID-19.

关键词： SARS-CoV-2 COVID-19 Dendritic cell Long-COVID

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