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1.
Cell ; 185(17): 3214-3231.e23, 2022 08 18.
Artículo en Inglés | MEDLINE | ID: mdl-35907404

RESUMEN

Although mutations in mitochondrial-associated genes are linked to inflammation and susceptibility to infection, their mechanistic contributions to immune outcomes remain ill-defined. We discovered that the disease-associated gain-of-function allele Lrrk2G2019S (leucine-rich repeat kinase 2) perturbs mitochondrial homeostasis and reprograms cell death pathways in macrophages. When the inflammasome is activated in Lrrk2G2019S macrophages, elevated mitochondrial ROS (mtROS) directs association of the pore-forming protein gasdermin D (GSDMD) to mitochondrial membranes. Mitochondrial GSDMD pore formation then releases mtROS, promoting a switch to RIPK1/RIPK3/MLKL-dependent necroptosis. Consistent with enhanced necroptosis, infection of Lrrk2G2019S mice with Mycobacterium tuberculosis elicits hyperinflammation and severe immunopathology. Our findings suggest a pivotal role for GSDMD as an executer of multiple cell death pathways and demonstrate that mitochondrial dysfunction can direct immune outcomes via cell death modality switching. This work provides insights into how LRRK2 mutations manifest or exacerbate human diseases and identifies GSDMD-dependent necroptosis as a potential target to limit Lrrk2G2019S-mediated immunopathology.


Asunto(s)
Mitocondrias , Necroptosis , Proteínas de Unión a Fosfato/metabolismo , Proteínas Citotóxicas Formadoras de Poros/metabolismo , Animales , Humanos , Inflamasomas , Proteína 2 Quinasa Serina-Treonina Rica en Repeticiones de Leucina , Macrófagos , Ratones , Mitocondrias/metabolismo , Especies Reactivas de Oxígeno/metabolismo
2.
Nat Methods ; 21(5): 846-856, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38658646

RESUMEN

CD4+ T cells recognize peptide antigens presented on class II major histocompatibility complex (MHC-II) molecules to carry out their function. The remarkable diversity of T cell receptor sequences and lack of antigen discovery approaches for MHC-II make profiling the specificities of CD4+ T cells challenging. We have expanded our platform of signaling and antigen-presenting bifunctional receptors to encode MHC-II molecules presenting covalently linked peptides (SABR-IIs) for CD4+ T cell antigen discovery. SABR-IIs can present epitopes to CD4+ T cells and induce signaling upon their recognition, allowing a readable output. Furthermore, the SABR-II design is modular in signaling and deployment to T cells and B cells. Here, we demonstrate that SABR-IIs libraries presenting endogenous and non-contiguous epitopes can be used for antigen discovery in the context of type 1 diabetes. SABR-II libraries provide a rapid, flexible, scalable and versatile approach for de novo identification of CD4+ T cell ligands from single-cell RNA sequencing data using experimental and computational approaches.


Asunto(s)
Linfocitos T CD4-Positivos , Epítopos de Linfocito T , Antígenos de Histocompatibilidad Clase II , Linfocitos T CD4-Positivos/inmunología , Epítopos de Linfocito T/inmunología , Animales , Antígenos de Histocompatibilidad Clase II/inmunología , Antígenos de Histocompatibilidad Clase II/química , Ratones , Humanos , Diabetes Mellitus Tipo 1/inmunología , Péptidos/inmunología , Péptidos/química , Presentación de Antígeno/inmunología , Receptores de Antígenos de Linfocitos T/inmunología , Ratones Endogámicos NOD , Análisis de la Célula Individual/métodos
3.
Int Immunol ; 36(3): 111-128, 2024 Feb 21.
Artículo en Inglés | MEDLINE | ID: mdl-38066638

RESUMEN

Nurr1 is a member of the orphan nuclear receptor family NR4A (nuclear receptor subfamily 4 group A) that modulates inflammation in several cell lineages, both positively and negatively. Macrophages are key regulators of inflammatory responses, yet information about the role of Nurr1 in human macrophages is scarce. Here we examined Nurr1 expression and activity in steady state and activated human macrophages. Pro- and anti-inflammatory macrophages were generated in vitro by culture of blood monocytes with granulocyte/macrophage colony-stimulating factor (GM-CSF) and macrophage colony-stimulating factor (M-CSF), respectively. Nurr1 expression was predominant in macrophages with the pro-inflammatory phenotype. Nurr1 activation with the agonists 1,1-bis(3'-indolyl)-1-(p-chlorophenyl) methane (C-DIM12) or isoxazolo-pyridinone 7e (IP7e) did not globally modify the polarization status of pro-inflammatory macrophages, but they decreased their production of TNF, IL-1ß, IL-6, IL-8, IL-12 p40, CCL2, IFN-ß, and reactive oxygen species, with variable potencies. Conversely, Nurr1 deficient macrophages increased the expression of transcripts encoding inflammatory mediators, particularly that of IL6, IFNB1, and CCL2. Mechanistically, endogenous Nurr1 interacted with NF-κB p65 in basal conditions and upon lipopolysaccharide (LPS)-mediated activation. C-DIM12 stabilized those complexes in cells exposed to LPS and concurrently decreased NF-κB transcriptional activity and p65 nuclear translocation. Expression of high levels of Nurr1 was associated with a subset of dermal macrophages that display enhanced levels of TNF and lower expression of the anti-inflammatory marker CD163L1 in skin lesions from patients with bullous pemphigoid (BP), a chronic inflammatory autoimmune blistering disorder. These results suggest that Nurr1 expression is linked with the pro-inflammatory phenotype of human macrophages, both in vivo and in vitro, where it may constitute a brake to attenuate the synthesis of inflammatory mediators.


Asunto(s)
Factor Estimulante de Colonias de Macrófagos , FN-kappa B , Humanos , FN-kappa B/metabolismo , Factor Estimulante de Colonias de Macrófagos/metabolismo , Lipopolisacáridos/farmacología , Macrófagos , Miembro 2 del Grupo A de la Subfamilia 4 de Receptores Nucleares/genética , Miembro 2 del Grupo A de la Subfamilia 4 de Receptores Nucleares/metabolismo , Receptores Citoplasmáticos y Nucleares/metabolismo , Inflamación/metabolismo , Mediadores de Inflamación/metabolismo , Antiinflamatorios/metabolismo
4.
Chemphyschem ; 25(4): e202300535, 2024 Feb 16.
Artículo en Inglés | MEDLINE | ID: mdl-38060839

RESUMEN

Since their discovery in the 1940s, shape memory polymers (SMPs) have been used in a broad spectrum of applications for research and industry.[1] SMPs can adopt a temporary shape and promptly return to their original form when submitted to an external stimulus. They have proven useful in fields such as wearable and stretchable electronics,[2] biomedicine,[3] and aerospace..[4] These materials are attractive and unique due to their ability to "remember" a shape after being submitted to elastic deformation. By combining the properties of SMPs with the advantages of electrochemistry, opportunities have emerged to develop structured sensing devices through simple and inexpensive fabrication approaches. The use of electrochemistry for signal transduction provides several advantages, including the translation into inexpensive sensing devices that are relatively easy to miniaturize, extremely low concentration requirements for detection, rapid sensing, and multiplexed detection. Thus, electrochemistry has been used in biosensing,[5] pollutant detection,[6] and pharmacological[7] applications, among others. To date, there is no review that summarizes the literature addressing the use of SMPs in the fabrication of structured electrodes for electrochemical sensing. This review aims to fill this gap by compiling the research that has been done on this topic over the last decade.

5.
Chemphyschem ; 25(4): e202400056, 2024 Feb 16.
Artículo en Inglés | MEDLINE | ID: mdl-38350712

RESUMEN

The front cover artwork is provided by Prof. Jose Moran-Mirabal's group at McMaster University in Hamilton, Ontario, Canada. The image shows a 3D rendering and electron microscopy images of micro/nanostructured electrodes, fabricated through thermal shrinking of a shape memory polymer. Read the full text of the Review at 10.1002/cphc.202300535.

6.
Int J Phytoremediation ; : 1-8, 2024 Mar 26.
Artículo en Inglés | MEDLINE | ID: mdl-38529629

RESUMEN

Many contaminated tailings throughout the world cause environmental and human-health related problems due to air and water drift. Tailing phytostabilization is a promising solution, but only certain plant species may tolerate and grow in these contaminated areas. We analyzed the chemical properties of a vegetated and unvegetated area in a tailing site in Central Chile. In addition, in the vegetated area we analyzed the metals content of roots, stems, and foliage in 41-years old plantations of Pinus radiata, Acacia dealbata, and Eucalyptus globulus (the only three species that survived from a total of 34 species planted), and determined height (H), and diameter at breast height (DBH). The results indicated that, except for pH, Se, Pb, and organic matter, all components (nutrients and metals) were two- to three- fold lower in the vegetated tailing compared to that of the unvegetated tailing. The analysis of plant tissues indicated that Cu was higher in the roots of P. radiata (2,073 mg kg-1) and lower in the stems of the same species (4.1 mg kg-1). However, the ability to take up and transport Cu to the shoots was higher in A. dealbata and lower in P. radiata (bioaccumulation factor of 0.19 and 0.06, respectively).


Here we present results for the first long-term phytostabilization project of copper mine tailings in Chile. From the 34 native and exotic species established in 1980 in a mine tailing disposal site with 1,000 mg Cu kg−1, only the exotic Pinus radiata, Acacia dealbata and Eucalyptus globulus were able to survive and adapt to the tailing conditions the last 41 years. This corroborates their potential for the future phytostabilization of copper mine wastes.

7.
Nano Lett ; 23(7): 2703-2709, 2023 Apr 12.
Artículo en Inglés | MEDLINE | ID: mdl-36952678

RESUMEN

Obtaining arrays of single nanoparticles with three-dimensional complex shapes is still an open challenge. Current nanolithography methods do not allow for the preparation of nanoparticles with complex features like nanostars. In this work, we investigate the optical printing of gold nanostars of different sizes as a function of laser wavelength and power. We found that tuning the laser to the main resonances of the nanostars in the near-infrared makes it possible to avoid nanoparticles reshaping due to plasmonic heating, enabling their deposition at the single particle level and in ordered arrays.

8.
Nat Mater ; 21(6): 640-646, 2022 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-35552524

RESUMEN

Ferrimagnetic alloys are model systems for understanding the ultrafast magnetization switching in materials with antiferromagnetically coupled sublattices. Here we investigate the dynamics of the rare-earth and transition-metal sublattices in ferrimagnetic GdFeCo and TbCo dots excited by spin-orbit torques with combined temporal, spatial and elemental resolution. We observe distinct switching regimes in which the magnetizations of the two sublattices either remain synchronized throughout the reversal process or switch following different trajectories in time and space. In the latter case, we observe a transient ferromagnetic state that lasts up to 2 ns. The asynchronous switching of the two magnetizations is ascribed to the master-agent dynamics induced by the spin-orbit torques on the transition-metal and rare-earth sublattices and their weak antiferromagnetic coupling, which depends sensitively on the alloy microstructure. Larger antiferromagnetic exchange leads to faster switching and shorter recovery of the magnetization after a current pulse. Our findings provide insight into the dynamics of ferrimagnets and the design of spintronic devices with fast and uniform switching.

9.
Phys Rev Lett ; 130(11): 110801, 2023 Mar 17.
Artículo en Inglés | MEDLINE | ID: mdl-37001104

RESUMEN

Strong local passivity is a property of multipartite quantum systems from which it is impossible to extract energy locally. Surprisingly, if the strong local passive state displays entanglement, it could be possible to locally activate energy density by adding classical communication between different partitions of the system, through so-called "quantum energy teleportation" protocols. Here, we report both the first experimental observation of local activation of energy density on an entangled state and the first realization of a quantum energy teleportation protocol using nuclear magnetic resonance on a bipartite quantum system.

10.
Mol Cell ; 60(4): 509-11, 2015 Nov 19.
Artículo en Inglés | MEDLINE | ID: mdl-26590709

RESUMEN

In this issue and the October 15th issue of Molecular Cell, studies by Montal et al. (2015) and Vincent et al. (2015) report that certain types of cancer cells utilize the gluconeogenic enzymes phosphoenolpyruvate carboxykinase (PEPCK) and phosphoenolpyruvate carboxykinase 2 (PCK2) to reprogram anabolic metabolism and support cell growth.


Asunto(s)
Carcinoma de Pulmón de Células no Pequeñas/metabolismo , Regulación Neoplásica de la Expresión Génica , Gluconeogénesis/genética , Neoplasias Pulmonares/metabolismo , Neoplasias/metabolismo , Fosfoenolpiruvato Carboxiquinasa (ATP)/metabolismo , Animales , Humanos
11.
J Therm Biol ; 112: 103459, 2023 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-36796904

RESUMEN

BACKGROUND: Brown adipose tissue (BAT) high density of mitochondria and its thermogenic characteristics promote the dissipation of chemical energy in the form of heat, increasing body caloric expenditure, decreasing plasma levels of lipids and glucose (GL). This makes BAT a potential therapeutic target of Metabolic Syndrome (MetS). Position Emission Tomography Scanning (PET-CT) is the gold standard for estimating BAT, but it has several limitations, including high cost and high emission of radiation. On the other hand, Infrared Thermography (IRT) is considered a simpler, cheaper and non-invasive method to detect BAT. OBJECTIVE: The aim of this study was to compare BAT activation through IRT and cold stimulation in men diagnosed without and with MetS. METHODS: Sample of 124 (35.3 ± 9.4 years old) men was evaluated of body composition, anthropometric measurements and dual X-ray absorptiometry (DXA) hemodynamics, biochemical tests and body skin temperature acquisition. The Student t-test with subsequent effect size by (d) Cohen and two-way repeated measures ANOVA with Tukey post-hoc comparisons were conducted. Level of significance was p < 0.05. RESULTS: There was significant interaction between group factor (MetS) vs group moment (BAT activation) in supraclavicular skin temperatures right side (maximum (F(1,122) = 10.4, p < 0.002, η2 = 0.062), mean (F(1.122) = 13.0, p < 0.001, η2 = 0.081) and minimal (F(1,122) = 7.9, p < 0.006, η2 = 0.052)) and left side maximum (F(1,122) = 7.7, p < 0.006, η2 = 0.048), mean (F(1.122) = 13.0, p < 0.037, η2 = 0.007) and minimal (F(1,122) = 9.8, p < 0.002, η2 = 0.012)). The MetS risk factor group didn't present significant increase of SCV temperature BAT after cold stimulation. CONCLUSION: Men diagnosed with MetS risk factors seem to activate less BAT, when exposed to cold stimulation, compared to group without MetS risk factor.


Asunto(s)
Síndrome Metabólico , Tomografía Computarizada por Tomografía de Emisión de Positrones , Masculino , Humanos , Adulto , Termografía/métodos , Síndrome Metabólico/diagnóstico , Síndrome Metabólico/metabolismo , Tejido Adiposo Pardo/metabolismo , Frío
12.
Int J Mol Sci ; 24(16)2023 Aug 11.
Artículo en Inglés | MEDLINE | ID: mdl-37628890

RESUMEN

In recent years, the study of extracellular vesicles (EVs) in the context of various diseases has dramatically increased due to their diagnostic and therapeutic potential. Typically, EVs are isolated in vitro from the cell culture of primary cells or cell lines or from bodily fluids. However, these cell culture methods do not represent the whole complexity of an in vivo microenvironment, and bodily fluids contain a high heterogeneous population of vesicles since they originate from different tissues. This highlights the need to develop new methods to isolate EVs directly from tissue samples. In the present study, we established a protocol for isolating EVs from hepatic and adipose tissue of mice, using a combination of ultracentrifugation and iodixanol-sucrose density gradient separation. EV isolation was confirmed with EV protein marker enrichment in Western blot assays, total protein quantification, and transmission electron microscopy. Regarding the liver tissue, we additionally implemented size exclusion chromatography (SEC) to further increase the purity grade of the EVs. The successful isolation of EVs from tissue samples will allow us to uncover a more precise molecular composition and functions, as well as their role in intercellular communication in an in vivo microenvironment.


Asunto(s)
Vesículas Extracelulares , Animales , Ratones , Cromatografía en Gel , Hígado , Tejido Adiposo , Western Blotting
13.
Rev Esp Enferm Dig ; 115(7): 362-367, 2023 07.
Artículo en Inglés | MEDLINE | ID: mdl-35748434

RESUMEN

INTRODUCTION: despite significant medical and technological advances, the incidence of postoperative pancreatic fistula (POPF) after distal pancreatectomy (DP) is reported to be between 3-45 %. The main objective of this study was to analyze the early post-surgical risk factors for developing POPF after DP. MATERIAL AND METHODS: a retrospective observational study was performed on a prospective basis of patients undergoing DP in a tertiary hospital from January 2011 to December 2021. Sociodemographic, preoperative analytical, tumor-related and postoperative complications variables were analyzed. RESULTS: of the 52 patients analyzed, 71.8 % of the sample had postoperative drains amylase elevation. However, 25.7 % of the total had grade-B and/or grade-C POPF. Univariate logistic regression with the variables studied showed the following as risk factors for B-C or clinically relevant POPF: amylase values in drainage at the 5th postoperative day (POD) (p = 0.097; 1.01 [1-1.01]), preoperative BMI (p = 0.015; 1.27 [1.04-1.55]) and C-reactive protein (CRP) value at the 3rd POD (p = 0.034; 1.01 [1.01-1.02]). The ROC curve of CRP value at the 3rd POD showed an area under the curve of 0.764 (95 % CI: 0.6-0.93) and the best cut-off point was 190 mg/l (sensitivity 89 % and specificity 67 %). CONCLUSIONS: CRP value at the 3rd POD is a predictive factor for POPF after DP. Early detection of patients at risk of POPF based on these characteristics could have an impact on their postoperative management.


Asunto(s)
Pancreatectomía , Fístula Pancreática , Humanos , Pancreatectomía/efectos adversos , Fístula Pancreática/diagnóstico , Fístula Pancreática/epidemiología , Fístula Pancreática/etiología , Proteína C-Reactiva , Estudios Prospectivos , Pancreaticoduodenectomía/efectos adversos , Factores de Riesgo , Complicaciones Posoperatorias/diagnóstico , Complicaciones Posoperatorias/etiología , Complicaciones Posoperatorias/epidemiología , Drenaje/efectos adversos , Amilasas/metabolismo , Estudios Retrospectivos
14.
Angew Chem Int Ed Engl ; 62(19): e202218080, 2023 05 02.
Artículo en Inglés | MEDLINE | ID: mdl-36912777

RESUMEN

A key challenge for sensor miniaturization is to create electrodes with smaller footprints, while maintaining or increasing sensitivity. In this work, the electroactive surface of gold electrodes was enhanced 30-fold by wrinkling followed by chronoamperometric (CA) pulsing. Electron microscopy showed increased surface roughness in response to an increased number of CA pulses. The nanoroughened electrodes also showed excellent fouling resistance when submerged in solutions containing bovine serum albumin. The nanoroughened electrodes were used for electrochemical detection of Cu2+ in tap water and of glucose in human blood plasma. In the latter case, the nanoroughened electrodes allowed highly sensitive enzyme-free sensing of glucose, with responses comparable to those of two commercial enzyme-based sensors. We anticipate that this methodology to fabricate nanostructured electrodes can accelerate the development of simple, cost-effective, and high sensitivity electrochemical platforms.


Asunto(s)
Técnicas Biosensibles , Nanoestructuras , Humanos , Oro , Técnicas Electroquímicas/métodos , Glucosa , Electrodos , Técnicas Biosensibles/métodos
15.
Thorax ; 77(3): 268-275, 2022 03.
Artículo en Inglés | MEDLINE | ID: mdl-34301740

RESUMEN

BACKGROUND: Antenatal pathological conditions are key in the pathogenesis of bronchopulmonary dysplasia (BPD). Pathophysiological pathways or endotypes leading to prematurity and perinatal lung injury can be clustered into two groups: infection and dysfunctional placentation, which include hypertensive disorders of pregnancy (HDP) and intrauterine growth restriction (IUGR). We conducted a systematic review of observational studies exploring the association between the dysfunctional placentation endotype and BPD. METHODS: MEDLINE, Embase and Web of Science databases were searched up to February 2020 for studies reporting data on the diagnosis of HDP, IUGR or small for gestational age (SGA) and BPD risk. BPD was classified as BPD28 (supplemental oxygen on day 28), BPD36 (oxygen at 36 weeks postmenstrual age), severe BPD (≥ 30% oxygen or mechanical ventilation), BPD36/death and BPD-associated pulmonary hypertension. RESULTS: Of 6319 studies screened, 211 (347 963 infants) were included. Meta-analysis showed an association between SGA/IUGR and BPD36 (OR 1.56, 95% CI 1.37 to 1.79), severe BPD (OR 1.82, 95% CI 1.36 to 2.29) and BPD/death (OR 1.91, 95% CI 1.55 to 2.37). Exposure to HDP was not associated with BPD but was associated with decreased odds of BPD/death (OR 0.77, 95% CI 0.64 to 0.94). Both HDP (OR 1.41, 95% CI 1.10 to 1.80) and SGA/IUGR (OR 2.37, 95% CI 1.86 to 3.02) were associated with BPD-associated pulmonary hypertension. CONCLUSION: When placental vascular dysfunction is accompanied by fetal growth restriction or being born SGA, it is associated with an increased risk of developing BPD and pulmonary hypertension. The placental dysfunction endotype of prematurity is strongly associated with the vascular phenotype of BPD. PROSPERO REGISTRATION NUMBER: Review protocol was registered in PROSPERO database (ID=CRD42018086877).


Asunto(s)
Displasia Broncopulmonar , Displasia Broncopulmonar/epidemiología , Femenino , Humanos , Recién Nacido , Recien Nacido Prematuro , Placentación , Embarazo
16.
Nephrol Dial Transplant ; 37(11): 2253-2263, 2022 10 19.
Artículo en Inglés | MEDLINE | ID: mdl-35927791

RESUMEN

BACKGROUND: Kidney replacement therapy (KRT) confers the highest risk of death from coronavirus disease 2019 (COVID-19). However, most data refer to the early pandemic waves. Whole-year analysis compared with prior secular trends are scarce. METHODS: We present the 2020 REMER Madrid KRT registry, corresponding to the Spanish Region hardest hit by COVID-19. RESULTS: In 2020, KRT incidence decreased 12% versus 2019, while KRT prevalence decreased by 1.75% for the first time since records began and the number of kidney transplants (KTs) decreased by 16%. Mortality on KRT was 10.2% (34% higher than the mean for 2008-2019). The 2019-2020 increase in mortality was larger for KTs (+68%) than for haemodialysis (+24%) or peritoneal dialysis (+38%). The most common cause of death was infection [n = 419 (48% of deaths)], followed by cardiovascular [n = 200 (23%)]. Deaths from infection increased by 167% year over year and accounted for 95% of excess deaths in 2020 over 2019. COVID-19 was the most common cause of death (68% of infection deaths, 33% of total deaths). The bulk of COVID-19 deaths [209/285 (73%)] occurred during the first COVID-19 wave, which roughly accounted for the increased mortality in 2020. Being a KT recipient was an independent risk factor for COVID-19 death. CONCLUSIONS: COVID-19 negatively impacted the incidence and prevalence of KRT, but the increase in KRT deaths was localized to the first wave of the pandemic. The increased annual mortality argues against COVID-19 accelerating the death of patients with short life expectancy and the temporal pattern of COVID-19 mortality suggests that appropriate healthcare may improve outcomes.


Asunto(s)
COVID-19 , Fallo Renal Crónico , Humanos , COVID-19/epidemiología , Fallo Renal Crónico/epidemiología , Fallo Renal Crónico/terapia , Terapia de Reemplazo Renal , Diálisis Renal , Pandemias
17.
J Appl Microbiol ; 133(6): 3534-3545, 2022 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-35988051

RESUMEN

INTRODUCTION: Quantitative reverse transcription PCR (RT-qPCR) is the leading tool to detect severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Given that it will almost certainly continue to coexist with other respiratory viruses in the coming years, our study aimed to design a multiplex PCR system not affected by supplier outages and with reduced cost compared to the existing commercially available kits. METHODS AND RESULTS: In this study, combinations of four primers/probe sets were used to construct a flexible RT-qPCR assay which is capable of discriminating between SARS-CoV-2 and the seasonal human coronavirus HCoV-OC43, or even influenza A virus. Additionally, the human RPP30 gene was used as an internal control. To demonstrate the robustness of the assay, it was applied to a collection of 150 clinical samples. The results showed 100% sensitivity and specificity compared to the automatized system used at the hospital and were better when indeterminate samples were analysed. CONCLUSIONS: This study provides an efficient method for the simultaneous detection of SARS-CoV-2, HCoV-OC43 and influenza A virus, and its efficacy has been tested on clinical samples showing outstanding results. SIGNIFICANCE AND IMPACT OF THE STUDY: The multiplex RT-qPCR design offers an accessible and economical alternative to commercial detection kits for hospitals and laboratories with limited economic resources or facing situations of supply shortage.


Asunto(s)
COVID-19 , Virus de la Influenza A , Humanos , SARS-CoV-2/genética , Reacción en Cadena de la Polimerasa Multiplex/métodos , Virus de la Influenza A/genética , COVID-19/diagnóstico , Sensibilidad y Especificidad , Nasofaringe
18.
Pharmacoepidemiol Drug Saf ; 31(5): 556-565, 2022 05.
Artículo en Inglés | MEDLINE | ID: mdl-34965012

RESUMEN

BACKGROUND: The effect of the inclusion of a more expensive me-too medicine in a hospital drug formulary (HDF) on both in- and out-of-hospital utilization, and the contextual factors which influence this type of induction is rarely studied. Accordingly, this work aimed to quantify the effect of the decision of a hospital of including a more expensive me-too antidepressant in its HDF. METHODS: A controlled longitudinal study was carried out in a Regional Health Service of Spain. We performed a segmented regression analysis with control group. We used the following dependent variables: defined daily doses (DDD) per 1000 inhabitants per day, DDD per 100 bed days, and cost per DDD. RESULTS: At a hospital level, the modification in the formulary led to utilization changes: (1) an increase in immediate consumption of the newly included me-too drug; and, (2) an annual 25.96% [95% CI: 2.96%-48.95%] decrease in the adjusted trend of the already existing parent antidepressant. The adjusted trend of the cost per DDD of the sum of all medications in the therapeutic group increased by 20.03% annually [95% CI: 3.24%-36.82%]. In the out-of-hospital setting utilization changes were: (1) the adjusted trend of the newly included me-too drug rose by 12.14% annually [95% CI: 4.97%-19.30%]; and, (2) that of the parent drug underwent a negative change in trend of 4.18% annually [95% CI: 0.00%-8.36%]. CONCLUSIONS: The inclusion of a more expensive me-too drug in the HDF led to increased consumption of this more expensive me-too drug both in- and out-of-hospital.


Asunto(s)
Prescripciones de Medicamentos , Utilización de Medicamentos , Antidepresivos/uso terapéutico , Hospitales , Humanos , Estudios Longitudinales
19.
J Thromb Thrombolysis ; 54(1): 162-171, 2022 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-35182310

RESUMEN

Behçet syndrome (BS) is a unique type of vasculitis that affects veins and arteries of all sizes, leading to recurrent vascular events, mostly venous thrombosis. The prevalence of venous thromboembolism in BS patients ranges between 15 and 40%. Thrombosis is usually an early manifestation leading to diagnosis of BS in up to 40% of patients. BS is per se a model of inflammation-induced thrombosis. The primary autoimmune response activates lymphocytes that in turn produce a cytokine cascade that activates neutrophils, which modify the secondary structure of fibrinogen making it less susceptible to plasmin-induced lysis. This leads to endothelial dysfunction, platelet activation and overexpression of tissue factor leading to inflammatory thrombi, usually attached to the wall. The pathogenesis of thrombosis is especially relevant to direct the specific treatment, that is based on immunosuppression rather than anticoagulation. Superficial vein thrombosis (SVT) and deep vein thrombosis (DVT) are the most common form of thrombosis in BS, but thrombosis in atypical sites (cava vein, suprahepatic veins, intracardiac thrombus) and arterial involvement can also occur. We assessed the latest update of the European League Against Rheumatism recommendations for the management of BS. Vascular Behçet treatment is usually based of immunosuppressants, and the role of anticoagulation remains controversial. The use of interventional and surgical procedures should be carefully evaluated, due to the risk of triggering a vascular pathergy phenomenon.


Asunto(s)
Síndrome de Behçet , Trombosis , Trombosis de la Vena , Anticoagulantes , Arterias , Síndrome de Behçet/complicaciones , Síndrome de Behçet/diagnóstico , Humanos , Inflamación/complicaciones , Trombosis/etiología , Trombosis de la Vena/complicaciones
20.
Appl Opt ; 61(32): 9716-9736, 2022 Nov 10.
Artículo en Inglés | MEDLINE | ID: mdl-36606914

RESUMEN

The Sunrise chromospheric infrared spectropolarimeter (SCIP) installed in the international balloon experiment sunrise iii will perform spectropolarimetric observations in the near-infrared band to measure solar photospheric and chromospheric magnetic fields simultaneously. The main components of SCIP for polarization measurements are a rotating wave plate, polarization beam splitters, and CMOS imaging sensors. In each of the sensors, SCIP records the orthogonal linearly polarized components of light. The polarization is later demodulated on-board. Each sensor covers one of the two distinct wavelength regions centered at 770 and 850 nm. To retrieve the proper circular polarization, the new parameter R, defined as the 45° phase shifted component of Stokes V in the modulation curve, is introduced. SCIP is aimed at achieving high polarization precision (1σ<3×10-4 of continuum intensity) to capture weak polarization signals in the chromosphere. The objectives of the polarization calibration test presented in this paper are to determine a response matrix of SCIP and to measure its repeatability and temperature dependence to achieve the required polarization precision. Tolerances of the response matrix elements were set after considering typical photospheric and chromospheric polarization signal levels. We constructed a feed optical system such that a telecentric beam can enter SCIP with the same f-number as the light distribution instrument of the sunrise iii telescope. A wire-grid linear polarizer and achromatic wave plate were placed before SCIP to produce the known polarization. The obtained response matrix was close to the values expected from the design. The wavelength and spatial variations, repeatability, and temperature dependence of the response matrix were confirmed to be smaller than tolerances.

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