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Based on the x-ray absorption edges of different elements, we simultaneously image and distinguish the composition of three differently shaped components of an object by using energy-resolved x-ray absorption ghost imaging (GI). The initial x-ray beam is spatially modulated by a series of Hadamard matrix masks, and the object is composed of three pieces of Mo, Ag, and Sn foil in the shape of a triangle, square, and circle, respectively. The transmitted x-ray intensity is measured by an energy-resolved single-pixel detector with a spectral resolution better than 0.8 keV. Through correlation of the transmission spectra with the corresponding Hadamard patterns, the spectral image of the sample is reconstructed, with a spatial resolution of 108 µm. Our experiment demonstrates a practical application of spectral ghost imaging, which has important potential for the noninvasive analysis of material composition and distribution in biology, medical science, and many other fields.
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BACKGROUND: Mild cognitive impairment (MCI) is a pre-clinical stage of Alzheimer's disease (AD). Understanding the transition probabilities across the disease continuum of AD, ranging from MCI to AD to Mortality is crucial for the economic modeling of AD and effective planning of future interventions and healthcare resource allocation decisions. This study uses the Multi-state Markov model to quantify the transition probabilities along the disease progression and specifically investigates medications as modifiable risk factors of AD associated with accelerated or decelerated transition times from MCI to AD, MCI to mortality, and AD to mortality. METHODS: Individuals with MCI were identified from the National Alzheimer's Coordinating Center between September 2005 and May 2021. A three-state Markov model was postulated to model the disease progression among three states: MCI, AD, and mortality with adjustment for demographics, genetic characteristics, comorbidities and medications. Transition probabilities, the total length of stay in each state, and the hazard ratios of the use of medications for diabetes, hypertension, and hypercholesterolemia (the known modifiable risk factors of AD) were evaluated for these transitions. RESULTS: 3,324 individuals with MCI were identified. The probability of developing AD after one year since the initial diagnosis of MCI is 14.9%. After approximately 6 years from the initial diagnosis of MCI, the probability of transitioning to AD increases to nearly 41.7% before experiencing a subsequent decline. The expected total lengths of stay were 5.38 (95% CI: 0.002-6.03) years at MCI state and 7.61 (95%CI: 0.002-8.88) years at AD state. Patients with active use of lipid-lowering agents were associated with significantly lower hazards of transitioning from MCI to AD (HR: 0.83, 95%CI:0.71-0.96), MCI to mortality (HR: 0.51, 95%CI:0.34-0.77), and AD to mortality (HR: 0.81, 95%CI:0.66-0.99). CONCLUSIONS: Results suggest that lipid-lowering agents may confer a protective effect, delaying the onset of AD. Additionally, lipid-lowering agents indicate a favorable association with a longer survival time.
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Enfermedad de Alzheimer , Disfunción Cognitiva , Progresión de la Enfermedad , Humanos , Enfermedad de Alzheimer/epidemiología , Enfermedad de Alzheimer/tratamiento farmacológico , Disfunción Cognitiva/epidemiología , Masculino , Femenino , Anciano , Factores de Riesgo , Anciano de 80 o más Años , Cadenas de MarkovRESUMEN
BACKGROUND: Previous research has revealed the potential impact of circadian rhythms on pulmonary diseases; however, the connection between circadian rhythm-associated Thyrotroph Embryonic Factor (TEF) and Pulmonary Arterial Hypertension (PAH) remains unclear. We aim to assess the genetic causal relationship between TEF and PAH by utilizing two sets of genetic instrumental variables (IV) and publicly available Pulmonary Arterial Hypertension Genome-Wide Association Studies (GWAS). METHODS: Total of 23 independent TEF genetic IVs from recent MR reports and PAH GWAS including 162,962 European individuals were used to perform this two-sample MR study. Gain- and loss-of-function experiments were used to demonstrate the role of TEF in PAH. RESULTS: Our analysis revealed that as TEF levels increased genetically, there was a corresponding increase in the risk of PAH, as evidenced by IVW (OR = 1.233, 95% CI: 1.054-1.441; P = 0.00871) and weighted median (OR = 1.292, 95% CI for OR: 1.064-1.568; P = 0.00964) methods. Additionally, the up-regulation of TEF expression was associated with a significantly higher likelihood of abnormal circadian rhythm (IVW: P = 0.0024733, ß = 0.05239). However, we did not observe a significant positive correlation between circadian rhythm and PAH (IVW: P = 0.3454942, ß = 1.4980398). In addition, our in vitro experiments demonstrated that TEF is significantly overexpressed in pulmonary artery smooth muscle cells (PASMCs). And overexpression of TEF promotes PASMC viability and migratory capacity, as well as upregulates the levels of inflammatory cytokines. CONCLUSION: Our analysis suggests a causal relationship between genetically increased TEF levels and an elevated risk of both PAH and abnormal circadian rhythm. Consequently, higher TEF levels may represent a risk factor for individuals with PAH.
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Ritmo Circadiano , Estudio de Asociación del Genoma Completo , Análisis de la Aleatorización Mendeliana , Ritmo Circadiano/fisiología , Ritmo Circadiano/genética , Humanos , Análisis de la Aleatorización Mendeliana/métodos , Estudio de Asociación del Genoma Completo/métodos , Hipertensión Arterial Pulmonar/genética , Hipertensión Arterial Pulmonar/diagnóstico , Masculino , FemeninoRESUMEN
In the sphere of urban renewal of historic districts, preserving and innovatively reinterpreting traditional architectural styles remains a primary research focus. However, the modernization and adaptive reuse of traditional buildings often necessitate changes in their functionality. To cater to the demands of tourism in historic districts, many traditional residential buildings require conversion to commercial use, resulting in a mismatch between their external form and their internal function. This study explored an automated approach to transform traditional residences into commercially viable designs, offering an efficient and scalable solution for the modernization of historic architecture. We developed a methodology based on diffusion models, focusing on a dataset of nighttime shopfront facades. By training a low-rank adaptation (LoRA) model and integrating the ControlNet model, we enhanced the accuracy and stability of the generated images. The methodology's performance was validated through qualitative and quantitative assessments, optimizing the batch size, repetition, and learning rate configurations. These evaluations confirmed the method's effectiveness. Our findings significantly advance the modern commercial style transformation of historical architectural facades, providing a novel solution that maintains the aesthetic and functional integrity, thereby fostering breakthroughs in traditional design thinking and exploring new possibilities for the preservation and commercial adaptation of historical buildings.
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Lubricating base oils have been extensively employed for producing various industrial and consumer products. Therefore, their environmental and health impacts should be carefully evaluated. Although there have been many reports on pulmonary cytotoxicity and inflammatory responses of inhaled lubricating base oils, their potential influences on pulmonary surfactant (PS) films that play an essential role in maintaining respiratory mechanics and pulmonary immunity remains largely unknown. Here a systematic study on the interactions between an animal-derived natural PS and aerosols of water and representative mineral and vegetable base oils is performed using a novel biophysical assessing technique called constrained drop surfactometry capable of providing in vitro simulations of normal tidal breathing and physiologically relevant temperature and humidity in the lung. It was found that the mineral oil aerosols can impose strong inhibitions to the biophysical property of PS film, while the airborne vegetable oils and water show negligible adverse effects within the studied concentration range. The inhibitory effect is originated from the strong hydrophobicity of mineral oil, which makes it able to disrupt the interfacial molecular ordering of both phospholipid and protein compositions and consequently suppress the formation of condensed phase and multilayer scaffolds in a PS film. ENVIRONMENTAL IMPLICATION: Understanding the biophysical influence of airborne lubricating base oils on pulmonary surfactant (PS) films can provide new insights into the environmental impacts and health concerns of various industrial lubricant products. Here a comparative study on interactions between an animal-derived natural PS film and the aerosols of water and representative mineral and vegetable base oils under the true physiological conditions was conducted in situ using constrained drop surfactometry. We show that the most frequently used mineral base oil can cause strong inhibitions to the PS film by disrupting the molecular ordering of saturated phospholipids and surfactant-associated proteins at the interface.
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Aerosoles , Lubricantes , Surfactantes Pulmonares , Aerosoles/química , Surfactantes Pulmonares/química , Lubricantes/química , Aceite Mineral/química , Animales , Aceites de Plantas/química , Fosfolípidos/química , Agua/químicaRESUMEN
BACKGROUND: After drug-coated balloon (DCB) treatment of the femoropopliteal artery in-stent restenosis (ISR), a certain proportion of patients also experience target lesion restenosis. The purpose of this study was to explore the efficacy and safety of rivaroxaban combined with aspirin in the treatment of ISR after DCB intervention. METHODS: Patients who underwent DCB treatment for ISR after femoropopliteal artery intervention at our center from March 2017 to February 2022 were included consecutively. According to the drug treatment after DCB intervention of ISR, the patients were divided into rivaroxaban and aspirin group (RA Group) and dual antiplatelet therapy (DAPT) group. The outcomes of 2 groups during the 12-month follow-up after DCB intervention were compared. RESULTS: A total of 92 patients were included in final analysis, with 43 in RA group and 49 in DAPT group. During 12-month follow-up, a total of 15 cases of recurrent ISR were detected, and the recurrence rate of ISR and clinically driven target lesion revascularization in the RA group were lower than those in the DAPT group (P < 0.05). The vascular patency rate in the RA group was higher than that in the DAPT group at 6 and 12 months of follow-up (P < 0.05). During the follow-up, there were no adverse events such as death, myocardial infarction, stroke, amputation, or major bleeding, and only a total of 5 cases of minor bleeding occurred. CONCLUSIONS: Compared with the standard DAPT regimen, rivaroxaban combined with aspirin can safely improve the follow-up outcome after DCB for femoropopliteal ISR.
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Dispositivos de Protección Embólica , Embolia Intracraneal , Humanos , Embolia Intracraneal/prevención & control , Embolia Intracraneal/etiología , Embolia Intracraneal/diagnóstico por imagen , Resultado del Tratamiento , Factores de Riesgo , Medición de Riesgo , Procedimientos Endovasculares/instrumentación , Procedimientos Endovasculares/efectos adversos , Diseño de PrótesisRESUMEN
Background: Patent foramen ovale (PFO) is associated with migraine; however, the mechanism of PFO-associated migraine is not well known; additionally, percutaneous closure is controversial. This study aimed to investigate in situ thrombi within the PFO and explore the possible predictors of the effectiveness of PFO closure in migraineurs. Methods: This prospective cohort study included 48 asymptomatic patients and 92 migraineurs with PFO. Optical coherence tomography (OCT) was used to evaluate the PFO microstructure. Only migraineurs underwent percutaneous closure. Migraineurs were divided into two cohorts based on the presence of a thrombus within the PFO. The symptoms were assessed at the 12-month follow-up visit. Predictors were evaluated employing multivariate logistic regression and receiver operating characteristic curve analyses. Results: In situ thrombi within PFO were identified in 69 migraineurs and in two asymptomatic patients (76.7 % vs. 4.3 %; P < 0.001). Additionally, endocardial irregularity, discontinuity, low signal, and spasm were found in 59 (65.6 %), 15 (16.7 %), 13 (14.4 %), and six (6.7 %) patients, respectively, in the migraine group. In situ thrombus was associated with migraine risk (OR 49.03; 95%CI 8.52-282.18; P < 0.001). At the 12-month follow-up of the migraineur cohort, the primary endpoint, a 50 % reduction in migraine frequency after closure (with or without thrombus in PFO) was met (85.3 % vs. 25.0 %; P < 0.001). In situ thrombus was associated with migraine relief (OR 6.75; 95%CI 1.28-35.56; P = 0.024). Conclusions: In situ thrombus and abnormal endocardium within PFOs were common in migraineurs, and in situ thrombus was a risk factor for migraine. Percutaneous closure was more effective in migraineurs with thrombi within the PFO. OCT imaging improved the understanding of pathogenic PFOs and may be helpful in selecting suitable migraineurs for PFO closure.
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Patients with previous interatrial shunt device (IASD) implantation may face greater challenges during future left atrial interventional procedures. Herein, we report the first case of left atrial appendage closure (LAAC) in a patient with previous IASD implantation. The patient successfully underwent LAAC using the LAmbre device without complications.
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Apéndice Atrial , Fibrilación Atrial , Cateterismo Cardíaco , Humanos , Apéndice Atrial/fisiopatología , Apéndice Atrial/diagnóstico por imagen , Fibrilación Atrial/fisiopatología , Fibrilación Atrial/diagnóstico , Fibrilación Atrial/cirugía , Resultado del Tratamiento , Cateterismo Cardíaco/instrumentación , Masculino , Femenino , Ecocardiografía Transesofágica , Anciano , Función del Atrio Izquierdo , Foramen Oval Permeable/diagnóstico por imagen , Foramen Oval Permeable/terapia , Foramen Oval Permeable/complicaciones , Foramen Oval Permeable/fisiopatología , Foramen Oval Permeable/cirugía , Cierre del Apéndice Auricular IzquierdoRESUMEN
BACKGROUND: To date, whether ascending aorta dilation (AAD) should be considered a contraindication for transcatheter aortic valve replacement (TAVR) remains a topic of debate.. OBJECTIVE: The study investigated the clinical outcome of TAVR in patients with bicuspid aortic valve stenosis (BAV-AS) complicated by AAD. METHODS: We included patients with BAV-AS who underwent TAVR between 2012 and 2019. We collected patient perioperative clinical data., tracked clinical outcomes for over four years post-TAVR, and obtained echocardiography images one year postoperatively. The Kaplan-Meier method was employed for analyzing both unadjusted and adjusted survival data, which was compared using the log-rank test. COX regression and nomograms were used to assess the impact of AAD on post-TAVR clinical outcomes in patients with aortic stenosis (AS), with all-cause mortality as the primary clinical endpoint. RESULTS: A total of 111 BAV patients were included in this study. Long-term follow-up showed an increased mortality risk in patients with BAV-AAD (adjusted Kaplan-Meier analysis: P = .02/0.001). Cox correlation analysis indicated that age (OR = 1.137; P = .034), AAD (OR = 3.51; P = .038), and postoperative left ventricular pressure (LVSP) (OR: 0.959; P = .044) were predictive factors for mortality more than four years after TAVR in patients with BAV. The area under the curve of the Nomogram predicting long-term survival for the training set of patients based on the above metrics was 0.845 (95% CI: 0.696-0.994). Short-term cardiac ultrasound follow-up showed a more rapid rate of AA expansion (0.29 [0-0.34] vs. -1 [-3.3-1] mm/month, P = .001) and a smaller proportion of AA diameter reduction (7.1% vs. 53.7%, P = .001) in patients who died. CONCLUSIONS: Patients with BAV-AAD-AS treated with TAVR have an increased risk of long-term mortality, and clinical prediction models, including AAD age and postoperative LVSP, may predict long-term patient survival. CONDENSED ABSTRACT: The study investigated the clinical outcome of transcatheter aortic valve replacement (TAVR) in patients with bicuspid aortic valve stenosis (BAV-AS) complicated by ascending aorta dilation (AAD). Patients with BAV-AAD-AS treated with TAVR have an increased risk of long-term mortality. AAD, age and postoperative LVSP, may predict long-term patient survival. Short-term cardiac ultrasound follow-up showed a more rapid rate of AA expansion and a smaller proportion of AA diameter reduction in patients who died. A high postoperative AAD expansion rate may indicate an adverse clinical outcome. Surgery regimens for tolerable BAV-AADs and can be considered as a treatment option.
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Estenosis de la Válvula Aórtica , Enfermedad de la Válvula Aórtica Bicúspide , Reemplazo de la Válvula Aórtica Transcatéter , Humanos , Masculino , Femenino , Estenosis de la Válvula Aórtica/cirugía , Estenosis de la Válvula Aórtica/diagnóstico por imagen , Estenosis de la Válvula Aórtica/mortalidad , Anciano , Enfermedad de la Válvula Aórtica Bicúspide/cirugía , Enfermedad de la Válvula Aórtica Bicúspide/complicaciones , Enfermedad de la Válvula Aórtica Bicúspide/diagnóstico por imagen , Resultado del Tratamiento , Estudios de Seguimiento , Estudios Retrospectivos , Anciano de 80 o más Años , Factores de Tiempo , Persona de Mediana EdadRESUMEN
A novel, to the best of our knowledge, cross-spectral optical computing imaging experiment has been achieved through a single exposure of a charge-coupled device. The experimental setup integrates single-pixel imaging (SPI) with ghost imaging (GI) through a photoelectric conversion circuit and a synchronous modulation system. The experimental process involves modulation in one wavelength band (in SPI) and demodulation using the GI algorithm in another. Significantly, our approach utilizes optical computing demodulation, a departure from the conventional electronic demodulation in GI (SPI), which involves the convolution between the bucket optical signals and the modulated patterns on the digital micromirror device. A proof-of-concept cross-band imaging experiment from near-infrared to visible light has been carried out. The results highlight the system's ability to capture images at up to 20 frames per second using near-infrared illumination, which are then reconstructed in the visible light spectrum. This success not only validates the feasibility of our approach but also expands the potential applications in the SPI or GI fields, particularly in scenarios where two-dimensional detector arrays are either unavailable or prohibitively expensive in certain electromagnetic spectra such as x-ray and terahertz.
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INTRODUCTION: Atrial septal defect (ASD) is one of the most common congenital heart malformations. Although not recommended, a significant proportion of patients with aortic root defects receive ASD closure, some of whom have improved right ventricular function. The study aimed to investigate the safety of interventional therapy in ASD patients with complete aortic rim deficiency and explore the predictors of right atrial (RA) non-reverse remodeling. METHODS: 1,011 patients with ASD who underwent transcatheter closure in the Department of Cardiology, Zhongshan Hospital, affiliated to Fudan University from June 2017 to June 2023 were enrolled in the study. They were divided into a complete aortic rim deficiency group and without absent aortic rim group. Furthermore, patients who had an enlarged RA in the absent aortic rim group were divided into two subgroups according to whether their RA remodeling was reversed post-procedure. Multivariate logistic regression was used to determine the predictors of RA reverse remodeling. RESULTS: During the 1-year follow-up, no major operative complications occurred in all patients with the absence of an aortic rim and a normal edge. After the operation, the right heart remodeling was significantly reversed, multivariate logistic regression analysis was performed, and it was found that no coronary heart disease before an operation, lower plasma creatinine level, and larger RA and RV dimensions were the predictive factors for the reverse of RA remodeling after treatment. CONCLUSION: Transcatheter closure of ASD with complete aortic rim deficiency is safe and feasible. For patients without coronary heart disease, the lower the creatinine value and the lower the tricuspid regurgitation before an operation, the more improvement of RA remodeling after the operation.
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Photothermal immunotherapy is regarded as the ideal cancer therapeutic modality to against malignant solid tumors; however, its therapeutic benefits are often modest and require improvement. In this study, a thermoresponsive nanoparticle (BTN@LND) composed of a photothermal agent (PTA) and pyroptosis inducer (lonidamine) were developed to enhance immunotherapy applications. Specifically, our "two-step" donor engineering strategy produced the strong NIR-II-absorbing organic small-molecule PTA (BTN) that exhibited high NIR-II photothermal performance (ε1064 = 1.51 × 104 M-1 cm-1, η = 75.8%), and this facilitates the diagnosis and treatment of deep tumor tissue. Moreover, the fabricated thermally responsive lipid nanoplatform based on BTN efficiently delivered lonidamine to the tumor site and achieved spatiotemporal release triggered by the NIR-II photothermal effect. In vitro and in vivo experiments demonstrated that the NIR-II photothermal therapy (PTT)-mediated on-demand release of cargo effectively faciliated tumor cell pyroptosis, thereby intensifying the immunogenic cell death (ICD) process to promote antitumor immunotherapy. As a result, this intelligent component bearing photothermal and chemotherapy can maximally suppress the growth of tumors, thus providing a promising approach for pyroptosis/NIR-II PTT synergistic therapy against tumors.
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Indazoles , Nanopartículas , Neoplasias , Humanos , Fototerapia , Piroptosis , Neoplasias/tratamiento farmacológico , Inmunoterapia , Línea Celular TumoralRESUMEN
Cellulose-rich straws of corn and rice were torrefied under carbon dioxide, and the fuel characteristics and combustion performance of the obtained biochar were investigated. A high severity resulted in surface collapse, greater pore volume, elimination of oxygen, elevated calorific value, and improved hydrophobicity in biochar. Following carbon dioxide torrefaction, the cellulose content in solid biochar experienced a slight decrease when the temperature was raised to 220 °C for longer residence durations. At 300 °C, the cellulose content in the biochar was nearly eliminated, while the relative proportion of non-sugar organic matter in corn stover and rice straw increased to 87.40 % and 77.27 %, respectively. The maximum calorific values for biochar from corn and rice straws were 22.38 ± 0.03 MJ/kg and 18.72 ± 0.05 MJ/kg. The comprehensive combustion indexes of rice and corn straw samples decreased to 1.06 × 10-7 and 1.31 × 10-7 after torrefaction at 300 °C, respectively. In addition, the initial decomposition temperatures increased by 38 °C and 45 °C, while the ultimate combustion temperatures rose by 13 °C and 16 °C for corn and rice straws, respectively. These results imply an extended combustion timeframe for the torrefied samples.
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Dióxido de Carbono , Celulosa , Carbón Orgánico , Biomasa , TemperaturaRESUMEN
Despite the rapid development in the performances of organic solar cells (OSCs), high-performance OSC modules based on green printing are still limited. The severe Coffee-ring effect (CRE) is considered to be the primary reason for the nonuniform distribution of active layer films. To solve this key printing problem, the cosolvent strategy is presented to deposit the active layer films. The guest solvent Mesitylene with a higher boiling point and a lower surface tension is incorporated into the host solvent o-XY to optimize the rheological properties, such as surface tension and viscosity of the active layer solutions. And the synergistic effect of inward Marangoni flow generation and solution thickening caused by the cosolvent strategy can effectively restrain CRE, resulting in highly homogeneous large-area active layer films. In addition, the optimized crystallization and phase separation of active layer films effectively accelerate the charge transport and exciton dissociation of devices. Consequently, based on PM6:BTP-eC9 system, the device prepared with the co-solvent strategy shows the a power conversion efficiency of 17.80%. Moreover, as the effective area scales to 1 and 16.94 cm2, the recorded performances are altered to 16.71% and 14.58%. This study provides a universal pathway for the development of green-printed high-efficiency organic photovoltaics.
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BACKGROUND: The goal was to investigate the relationship between serum vascular endothelial growth factor (VEGF), P-selectin, high-density lipoprotein cholesterol (HDL-C), platelet parameters, and coagulation function indexes and postoperative deep vein thrombosis (DVT) in patients with traumatic fracture. METHODS: A total of 150 patients with traumatic fractures after DVT were selected as the DVT group, and 150 patients with traumatic fractures without DVT during the same period were selected as the non-DVT group. Serum VEGF, P-selectin, HDL-C, platelet parameters including platelet count (PLT), mean platelet volume (MPV), platelet distribution width (PDW), plateletcrit (PCT), platelet large cell ratio (P-LCR), and plasma coagulation function indexes including thrombin time (TT), prothrombin time (PT), activated partial thrombin time (APTT), fibrinogen (FIB), and D-dimer (D-D) were measured. Pearson's correlation was performed to analyze the correlation between serum VEGF, P-selectin, and coagulation function indexes, and binary logistic regression was used to analyze the risk factors of DVT. RESULTS: Serum VEGF and P-selectin in the DVT group were higher while HDL-C was lower than those in the non-DVT group (p < 0.05). Serum VEGF and P-selectin were negatively correlated with plasma D-D and FIB (p < 0.05), and serum HDL-C was negatively correlated (p < 0.05). Compared with the non-DVT group, MPV, PDW, and P-LCR in the DVT group were decreased (p < 0.05). Multivariate logistic regression analysis showed that P-LCR was a risk factor for postoperative DVT in patients with traumatic fractures (p < 0.05). CONCLUSIONS: Serum VEGF and P-selectin are higher and HDL-C is lower in patients with DVT after postoperative traumatic fracture than in patients without DVT. Combined detection of serum VEGF, P-selectin, HDL-C, and coagulation function indexes may help to reduce the risk of DVT. Platelet parameters (MPV, PDW, P-LCR) have certain reference values for the clinical diagnosis and disease evaluation of DVT.
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Fracturas Óseas , Trombosis , Trombosis de la Vena , Humanos , Factor A de Crecimiento Endotelial Vascular , Selectina-P , HDL-Colesterol , Trombosis de la Vena/diagnóstico , Trombosis de la Vena/etiología , FibrinógenoRESUMEN
Selective fractionation of hemicelluloses is of great significance for realizing high-value application of hemicelluloses and comprehensive utilization of lignocellulosic biomass. Tetramethylammonium hydroxide (TMAH) solvent has been confirmed as a promising solvent to selectively fractionate hemicelluloses from holocellulose. Herein, TMAH solvent was adopted to pretreat poplar thermomechanical pulp (PTMP) for the selective fractionation of hemicelluloses and enhancement of enzymatic hydrolysis performance of residues. The maximal hemicelluloses yield (65.0 %) and excellent cellulose retention rate (93.3 %) were achieved after pretreatment by the 25 wt% TMAH solvent, while the delignification was only 33.9 %. The hemicelluloses fractions could be selectively fractionated with high molecular weights (109,800-118,500 g/mol), the contents of Klason lignin in them were low (3.2-5.9 %), and the dominating structure of them was 4-O-methylglucurono-ß-D-xylan. Compared to the H2SO4 and NaOH methods, the hemicelluloses fractionated by TMAH method exhibited higher yields, more complete structures and higher molecular weights. Furthermore, the crystalline structure of cellulose practically remained stable, and the highest yield of enzymatic hydrolysis glucose was 57.5 %, which was 3.3 times of that of PTMP. The fractionation effectiveness of TMAH solvent was not significantly reduced after repeatedly recycling. This work demonstrated TMAH solvent could selectively fractionate hemicelluloses from PTMP and efficiently promote sustainable poplar-based biorefinery.
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Lignina , Polisacáridos , Populus , Compuestos de Amonio Cuaternario , Peso Molecular , Lignina/química , Celulosa/química , Solventes , Hidrólisis , BiomasaRESUMEN
Despite the first observations that the perforin can punch holes in target cells for live/dead cycles in the human immune system over 110 years ago, emulating this behavior in materials science remains challenging. Here, a perforin-mimicking molecular drilling strategy is employed to engineer macroporous hollow lignin spheres as performance-configurable catalysts, adhesives, and gels. Using a toolbox of over 20 molecular compounds, the local curvature of amphiphilic lignin is modulated to generate macroporous spheres with hole sizes ranging from 0 to 100 nm. Multiscale control is precisely achieved through noncovalent assembly directing catalysis, synthesis, and polymerization. Exceptional performance mutations correlate with the changes in hole size, including an increase in catalytic efficiency from 50% to 100%, transition from nonstick synthetics to ultrastrong adhesives (adhesion ≈18.3 MPa, exceeding that of classic epoxies), and transformation of viscous sols to tough nanogels. Thus, this study provides a robust and versatile noncovalent route for mimicking perforin-induced structural variations in cells, representing a significant stride toward the exquisite orchestration of assemblies over multiple length scales.
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BACKGROUND: Pulmonary arterial hypertension (PAH) still lacks effective biomarkers to assist in its diagnosis and prognosis. Galectin-3 binding protein (Gal-3BP) plays a role in immune and inflammatory diseases. OBJECTIVE: This study aimed to evaluate Gal-3BP as a prognostic and predictive factor in patients with PAH. METHODS: From January 2017 to December 2019, we enrolled 167 consecutive PAH patients and 58 healthy controls. Right heart catheterization (RHC) was used to diagnose PAH. Serum Gal-3BP levels were measured by high-sensitivity human enzyme-linked immunosorbent assay (ELISA). RESULTS: Serum Gal-3BP levels in the PAH group were significantly higher compared with the control group (4.87±2.09 vs 2.22±0.86 µg/mL, p<0.001). Gal-3BP level was correlated with several hemodynamic parameters obtained from RHC (p<0.001). Multivariate linear regression analysis showed that Gal-3BP was a risk factor for PAH (odds ratio (OR)=2.947, 95% CI: 1.821-4.767, p<0.001). The optimal cut-off value of serum Gal-3BP level for predicting PAH was 2.89 µg/mL (area under the curve (AUC)=0.860, 95 % CI: 0.811-0.910, p<0.001). Kaplan-Meier analysis showed that Gal-3BP levels above the median (4.87 µg/mL) were associated with an increased risk of death in patients with PAH (hazard ratio (HR)=8.868, 95 % CI: 3.631-21.65, p<0.0001). Cox multivariate risk regression analysis showed that Gal-3BP was a risk factor for death in PAH patients (HR=2.779, 95 % CI: 1.823-4.237, p<0.001). CONCLUSION: Serum Gal-3BP levels were increased in patients with PAH, and levels of Gal-3BP were associated with the severity of PAH. Gal-3BP might have predictive value for the diagnosis and prognosis of PAH.
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Hipertensión Arterial Pulmonar , Humanos , Biomarcadores , Pronóstico , Factores de RiesgoRESUMEN
BACKGROUND: The aim of the study was to clarify the correlation between serum MMP-2/-16 and inflammation in patients with deep venous thrombosis (DVT). METHODS: Sixty DVT patients and 60 healthy people who underwent health examinations were collected. Serum MMP-2/-16, IL-6/-8, and TNF-α were determined by ELISA. MMP-2/-16 protein levels were detected by western blot, and IL-6/-8 and TNF-α by RT-qPCR. Correlation analysis was performed on MMP-2/-16xdd, IL-6/-8, and TNF-α in DVT patients. RESULTS: MMP-2/-16, IL-6/-8, and TNF-α in DVT patients after treatment were lower than before treatment. Serum IL-6/-8 and TNF-α levels in DVT patients were both positively correlated with MMP-2/-16 levels. CONCLUSIONS: MMP-2/-16 and inflammatory factors are related to DVT development, and IL-6/-8 and TNF-α are positively correlated with MMP-2/-16.