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1.
Cell Tissue Res ; 396(3): 293-312, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38512548

RESUMEN

The 2019 coronavirus disease (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has brought an enormous public health burden to the global society. The duration of the epidemic, the number of infected people, and the widespread of the epidemic are extremely rare in modern society. In the initial stage of infection, people generally show fever, cough, and dyspnea, which can lead to pneumonia, acute respiratory syndrome, kidney failure, and even death in severe cases. The strong infectivity and pathogenicity of SARS-CoV-2 make it more urgent to find an effective treatment. Mesenchymal stem cells (MSCs) are a kind of pluripotent stem cells with the potential for self-renewal and multi-directional differentiation. They are widely used in clinical experiments because of their low immunogenicity and immunomodulatory function. Mesenchymal stem cell-derived exosomes (MSC-Exo) can play a physiological role similar to that of stem cells. Since the COVID-19 pandemic, a series of clinical trials based on MSC therapy have been carried out. The results show that MSCs are safe and can significantly improve patients' respiratory function and prognosis of COVID-19. Here, the effects of MSCs and MSC-Exo in the treatment of COVID-19 are reviewed, and the clinical challenges that may be faced in the future are clarified.


Asunto(s)
COVID-19 , Trasplante de Células Madre Mesenquimatosas , Células Madre Mesenquimatosas , SARS-CoV-2 , Humanos , COVID-19/terapia , Células Madre Mesenquimatosas/citología , Trasplante de Células Madre Mesenquimatosas/métodos , Exosomas
2.
Cancer Cell Int ; 24(1): 3, 2024 Jan 02.
Artículo en Inglés | MEDLINE | ID: mdl-38167096

RESUMEN

PURPOSE: The alterations of RNA profile in tumor-educated platelets (TEPs) have been described as a novel biosource for cancer diagnostics. This study aimed to explore the potential snoRNAs in TEP as biomarkers for diagnostics of hepatitis B virus-related hepatocellular carcinoma (HBV-related HCC). METHODS: Platelets were isolated using low-speed centrifugation and subjected to a quantitative polymerase chain reaction (qPCR) for snoRNAs detection. RESULTS: Down-regulated SNORD12B and SNORD14E as well as up-regulated SNORA63 were identified in TEP from HBV-related HCC, which could act as diagnostic biomarkers for HBV-related HCC as well as the early disease. Besides, TEP SNORD12B, SNORD14E, and SNORA63 facilitate the diagnostic performance of AFP and achieve favorable diagnostics efficiency for HBV-related HCC when combined with platelet parameters. CONCLUSIONS: Aberrant expression of SNORD12B, SNORA63, and SNORD14E in TEPs could serve as the novel and non-invasive biomarkers for HBV-related HCC diagnosis.

3.
Perfusion ; : 2676591241245876, 2024 Apr 08.
Artículo en Inglés | MEDLINE | ID: mdl-38587932

RESUMEN

PURPOSE: Exercise-based cardiac rehabilitation (EBCR) improves functional capacity in heart failure (HF). However, data on the effect of EBCR in patients with advanced HF and left ventricular assist devices (LVADs) are limited. This meta-analysis aimed to evaluate the impact of EBCR on the functional ability of LVAD patients by comparing the corresponding outcome indicators between the EBCR and ST groups. METHODS: PubMed, Embase, Clinical Trials, and Cochrane Library databases were searched for studies assessing and comparing the effects of EBCR and standard therapy (ST) in patients following LVAD implantation. Using pre-defined criteria, appropriate studies were identified and selected. Data from selected studies were extracted in a standardized fashion, and a meta-analysis was performed using a fixed-effects model. The protocol was registered on INPLASY (202340073). RESULTS: In total, 12 trials involving 477 patients were identified. The mean age of the participants was 52.9 years, and 78.6% were male. The initiation of EBCR varied from LVAD implantation during the index hospitalization to 11 months post-LVAD implantation. The median rehabilitation period ranged from 2 weeks to 18 months. EBCR was associated with improved peak oxygen uptake (VO2) in all trials. Quantitative analysis was performed in six randomized studies involving 214 patients (EBCR: n = 130, ST: n = 84). EBCR was associated with a significantly high peak VO2 (weighted mean difference [WMD] = 1.64 mL/kg/min; 95% confidence interval [CI], 0.20-3.08; p = .03). Similarly, 6-min walk distance (6MWD) showed significantly greater improvement in the EBCR group than in the ST group (WMD = 34.54 m; 95% CI, 12.47-56.42; p = .002) in 266 patients (EBCR, n = 140; ST, n = 126). Heterogeneity was low among the included trials. None of the included studies reported serious adverse events related to EBCR, indicating the safety of EBCR after LVAD implantation. CONCLUSION: This study demonstrated that EBCR following LVAD implantation is associated with greater improvement in functional capacity compared with ST as reflected by the improved peak VO2 and 6MWD values. Considering the small number of patients in this analysis, further research on the clinical impact of EBCR in LVAD patients is warranted.

4.
Molecules ; 28(6)2023 Mar 08.
Artículo en Inglés | MEDLINE | ID: mdl-36985440

RESUMEN

As a new member of the silica-derivative family, modified glass fiber (MGF) has attracted extensive attention because of its excellent properties and potential applications. Surface modification of glass fiber (GF) greatly changes its performance, resulting in a series of changes to its surface structure, wettability, electrical properties, mechanical properties, and stability. This article summarizes the latest research progress in MGF, including the different modification methods, the various properties, and their advanced applications in different fields. Finally, the challenges and possible solutions were provided for future investigations of MGF.

5.
Neurochem Res ; 47(12): 3565-3582, 2022 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-36309938

RESUMEN

Alzheimer's disease (AD) is a central nervous system disease that can lead to cognitive impairment and progressive memory loss. An increasing number of studies have shown that intestinal flora play a crucial role in regulating the brain-gut axis. Short-chain fatty acids are metabolites of intestinal flora that regulate hormone synthesis and play an essential role in microbial-intestinal-brain communication. An imbalance of intestinal flora can promote microglia to secrete proinflammatory factors, cause nerve inflammation, and then affect cognitive and learning ability. However, the mechanism is not clear. From this, we infer that endogenous hormones may be the medium for intestinal flora to affect the process of AD. This review of the relationships among AD, endogenous hormones, and intestinal flora expounds on the critical role of various hormones in the brain-gut axis. It discusses intervention measures aimed at intestinal flora to prevent or delay AD occurrence. Finally, the potential development prospects of fecal microbiota transplantation in treating AD are put forward, which provide potential ideas for future AD research.


Asunto(s)
Enfermedad de Alzheimer , Microbioma Gastrointestinal , Humanos , Microbioma Gastrointestinal/fisiología , Enfermedad de Alzheimer/metabolismo , Intestinos , Encéfalo/metabolismo , Hormonas/metabolismo
6.
Analyst ; 147(5): 862-869, 2022 Feb 28.
Artículo en Inglés | MEDLINE | ID: mdl-35133364

RESUMEN

Human epidermal growth factor receptor 2 (HER2) is one of the specific markers of breast cancer, which is of great significance to the early diagnosis and prognosis of breast cancer. Here, a fluorescence biosensor was established to detect HER2 based on the fluorescence resonance energy transfer (FRET) and photoinduced electron transfer (PET) occurring between the bimetal-polydopamine organic framework with core-shell structure Au@PDA@UiO-66 and the Cy5 fluorophore in HER2-Cy5-Apt. Au@PDA@UiO-66 owns high-efficiency fluorescence quenching ability due to its large specific surface area and strong adsorption of single-stranded DNA. When the target appears, the fluorescence recovery space mediated by the target is large, so the proposed biosensor has better sensitivity in theory. Under optimized conditions, the proposed fluorescent biosensor can detect HER2 in a range of 0.005 ng mL-1 to 15 ng mL-1, with an actual detection limit as low as 0.005 ng mL-1. Corresponding selective experiments, reproducible experiments, and spiked experiments performed well, showing its great potential in HER2 detection.


Asunto(s)
Técnicas Biosensibles , Compuestos Organometálicos , Humanos , Indoles , Estructuras Metalorgánicas , Ácidos Ftálicos , Polímeros/química , Receptor ErbB-2
7.
Sensors (Basel) ; 22(22)2022 Nov 09.
Artículo en Inglés | MEDLINE | ID: mdl-36433222

RESUMEN

This paper's novel focus is predicting the leaf nitrogen content of rice during growing and maturing. A multispectral image processing-based prediction model of the Radial Basis Function Neural Network (RBFNN) model was proposed. Moreover, this paper depicted three primary points as the following: First, collect images of rice leaves (RL) from a controlled condition experimental laboratory and new shoot leaves in different stages in the visible light spectrum, and apply digital image processing technology to extract the color characteristics of RL and the morphological characteristics of the new shoot leaves. Secondly, the RBFNN model, the General Regression Model (GRL), and the General Regression Method (GRM) model were constructed based on the extracted image feature parameters and the nitrogen content of rice leaves. Third, the RBFNN is optimized by and Partial Least-Squares Regression (RBFNN-PLSR) model. Finally, the validation results show that the nitrogen content prediction models at growing and mature stages that the mean absolute error (MAE), the Mean Absolute Percentage Error (MAPE), and the Root Mean Square Error (RMSE) of the RFBNN model during the rice-growing stage and the mature stage are 0.6418 (%), 0.5399 (%), 0.0652 (%), and 0.3540 (%), 0.1566 (%), 0.0214 (%) respectively, the predicted value of the model fits well with the actual value. Finally, the model may be used to give the best foundation for achieving exact fertilization control by continuously monitoring the nitrogen nutrition status of rice. In addition, at the growing stage, the RBFNN model shows better results compared to both GRL and GRM, in which MAE is reduced by 0.2233% and 0.2785%, respectively.


Asunto(s)
Nitrógeno , Oryza , Análisis de los Mínimos Cuadrados , Redes Neurales de la Computación , Arteria Radial
8.
Int J Mol Sci ; 22(7)2021 Mar 28.
Artículo en Inglés | MEDLINE | ID: mdl-33800600

RESUMEN

Entrapment neuropathy (EN) is a prevalent and debilitative condition caused by a complex pathogenesis that involves a chronic compression-edema-ischemia cascade and perineural adhesion that results in excessive shear stress during motion. Despite decades of research, an easily accessible and surgery-free animal model mimicking the mixed etiology is currently lacking, thus limiting our understanding of the disease and the development of effective therapies. In this proof-of-concept study, we used ultrasound-guided perineural injection of a methoxy poly(ethylene glycol)-b-Poly(lactide-co-glycoilide) carboxylic acid (mPEG-PLGA-BOX) hydrogel near the rat's sciatic nerve to induce EN, as confirmed sonographically, electrophysiologically, and histologically. The nerve that was injected with hydrogel appeared unevenly contoured and swollen proximally with slowed nerve conduction velocities across the injected segments, thus showing the compressive features of EN. Histology showed perineural cellular infiltration, deposition of irregular collagen fibers, and a possible early demyelination process, thus indicating the existence of adhesions. The novel method provides a surgery-free and cost-effective way to establish a small-animal model of EN that has mixed compression and adhesion features, thus facilitating the additional elucidation of the pathophysiology of EN and the search for promising treatments.


Asunto(s)
Hidrogeles/química , Síndromes de Compresión Nerviosa/fisiopatología , Enfermedades del Sistema Nervioso/fisiopatología , Poliésteres , Polietilenglicoles , Nervio Ciático/efectos de los fármacos , Ondas Ultrasónicas , Animales , Síndrome del Túnel Carpiano/fisiopatología , Fuerza Compresiva , Modelos Animales de Enfermedad , Edema , Masculino , Vaina de Mielina/química , Síndromes de Compresión Nerviosa/inducido químicamente , Enfermedades del Sistema Nervioso/inducido químicamente , Ratas , Ratas Sprague-Dawley , Nervio Ciático/patología
9.
Mikrochim Acta ; 187(11): 601, 2020 10 09.
Artículo en Inglés | MEDLINE | ID: mdl-33034719

RESUMEN

Hemin as the organic linker ligand and Cu (II) as the metal center were applied to prepare a copper-metal-organic framework (Cu-hemin-MOF) via one-step hydrothermal method. Characterization using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and X-ray powder diffraction (XRD) demonstrate that the acquired Cu-hemin-MOF possesses the appearance of 3D ball-flower shape with the existence of C, N, O, Fe, and Cu on the surface. Further study found that this 3D ball-flower shaped Cu-hemin-MOF exhibits peroxidase-like activity, which can catalyze the peroxidase substrate of o-phenylenediamine (OPD) to generate 2,3-diaminophenazine (DAP) in the presence of H2O2. DAP has a yellow color and also emits a strong fluorescence when excited by ultraviolet light. Interestingly, Cu-hemin-MOF's peroxidase-like activity can be strongly inhibited by glutathione (GSH). In view of this, a dual readout (fluorescence and colorimetry) was proposed to detect GSH for the first time. Under optimal conditions, the proposed method exhibits good linear relationship between the signal response (fluorescence and colorimetry) and the concentration of GSH, and low limits of detection (LOD) of 2.3 and 26.6 nM, respectively.Graphical abstract.


Asunto(s)
Colorimetría/instrumentación , Cobre/química , Glutatión/química , Hemina/química , Compuestos Organometálicos/química , Colorimetría/métodos , Estructura Molecular
10.
J Integr Plant Biol ; 62(7): 948-966, 2020 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-31449354

RESUMEN

The percentage of amylose in the endosperm of rice (Oryza sativa) largely determines grain cooking and eating qualities. Granule-bound starch synthase I (GBSSI) and GBSSII are responsible for amylose biosynthesis in the endosperm and leaf, respectively. Here, we identified OsGBP, a rice GBSS-binding protein that interacted with GBSSI and GBSSII in vitro and in vivo. The total starch and amylose contents in osgbp mutants were significantly lower than those of wild type in leaves and grains, resulting in reduced grain weight and quality. The carbohydrate-binding module 48 (CBM48) domain present in the C-terminus of OsGBP is crucial for OsGBP binding to starch. In the osgbp mutant, the extent of GBSSI and GBSSII binding to starch in the leaf and endosperm was significantly lower than wild type. Our data suggest that OsGBP plays an important role in leaf and endosperm starch biosynthesis by mediating the binding of GBSS proteins to developing starch granules. This elucidation of the function of OsGBP enhances our understanding of the molecular basis of starch biosynthesis in rice and contributes information that can be potentially used for the genetic improvement of yield and grain quality.


Asunto(s)
Oryza/crecimiento & desarrollo , Oryza/metabolismo , Proteínas de Plantas/química , Proteínas de Plantas/metabolismo , Secuencia de Aminoácidos , Secuencia de Bases , Vías Biosintéticas , Endospermo/metabolismo , Endospermo/ultraestructura , Regulación de la Expresión Génica de las Plantas , Mutación/genética , Oryza/genética , Hojas de la Planta/genética , Hojas de la Planta/metabolismo , Plastidios/metabolismo , Unión Proteica , Dominios Proteicos , Semillas/genética , Almidón/biosíntesis
11.
BMC Plant Biol ; 19(1): 109, 2019 Mar 20.
Artículo en Inglés | MEDLINE | ID: mdl-30894127

RESUMEN

BACKGROUND: Two-line hybrid rice with high yield potential is increasingly popular and the photo- and temperature-sensitive male sterile line is one of the basic components for two-line hybrid rice breeding. The development of male sterile lines through conventional breeding is a lengthy and laborious process, whereas developing thermo-sensitive genic male sterile (TGMS) lines for two-line hybrid breeding by editing a temperature-sensitivity gene by CRISPR/Cas9 is efficient and convenient. RESULTS: Here, thermo-sensitive genic male sterility (TGMS) was induced by employing the CRISPR/Cas9 gene editing technology to modify the gene TMS5. Two TGMS mutants, tms5-1 and tms5-2, both lacking any residual T-DNA, were generated in the indica rice cultivar Zhongjiazao17 (cv. YK17) background. When grown at a sub-optimal temperature (22 °C), both mutants produced viable pollen and successfully produced grain through self-fertilization, but at temperatures 24 and 26 °C, their pollen was sterile and no grain was set. F1 hybrids derived from the crosses between YK17S (tms5-1) and three different restorer lines outperformed both parental lines with respect to grain yield and related traits. CONCLUSION: The YK17S generated by CRISPR/Cas9 system was proved to be a new TGMS line with superior yield potential and can be widely utilized in two-line hybrid breeding of indica rice.


Asunto(s)
Sistemas CRISPR-Cas , Oryza/genética , Fitomejoramiento/métodos , Infertilidad Vegetal/genética , Proteínas de Plantas/genética , Quimera , Mutagénesis , Oryza/fisiología , Plantas Modificadas Genéticamente , Polen/genética , Polen/crecimiento & desarrollo , Temperatura
12.
Plant Biotechnol J ; 17(7): 1222-1235, 2019 07.
Artículo en Inglés | MEDLINE | ID: mdl-30552799

RESUMEN

Identification of seed development regulatory genes is the key for the genetic improvement in rice grain quality. NF-Ys are the important transcription factors, but their roles in rice grain quality control and the underlying molecular mechanism remain largely unknown. Here, we report the functional characterization a rice NF-Y heterotrimer complex NF-YB1-YC12-bHLH144, which is formed by the binding of NF-YB1 to NF-YC12 and then bHLH144 in a sequential order. Knock-out of each of the complex genes resulted in alteration of grain qualities in all the mutants as well as reduced grain size in crnf-yb1 and crnf-yc12. RNA-seq analysis identified 1496 genes that were commonly regulated by NF-YB1 and NF-YC12, including the key granule-bound starch synthase gene Wx. NF-YC12 and bHLH144 maintain NF-YB1 stability from the degradation mediated by ubiquitin/26S proteasome, while NF-YB1 directly binds to the 'G-box' domain of Wx promoter and activates Wx transcription, hence to regulate rice grain quality. Finally, we revealed a novel grain quality regulatory pathway controlled by NF-YB1-YC12-bHLH144 complex, which has great potential for rice genetic improvement.


Asunto(s)
Regulación de la Expresión Génica de las Plantas , Oryza/enzimología , Proteínas de Plantas/metabolismo , Almidón Sintasa/metabolismo , Factores de Transcripción con Motivo Hélice-Asa-Hélice Básico/metabolismo , Grano Comestible , Oryza/genética , Proteínas de Plantas/genética , Semillas , Almidón Sintasa/genética
13.
Int J Mol Sci ; 20(14)2019 Jul 12.
Artículo en Inglés | MEDLINE | ID: mdl-31336919

RESUMEN

Because of limitations in the current understanding of the exact pathogenesis of tendinopathy, and the lack of an optimal experimental model, effective therapy for the disease is currently unavailable. This study aims to prove that repression of oxidative stress modulates the differentiation of tendon-derived cells (TDCs) sustaining excessive tensile strains, and proposes a novel bioreactor capable of applying differential tensile strains to cultured cells simultaneously. TDCs, including tendon-derived stem cells, tenoblasts, tenocytes, and fibroblasts, were isolated from the patellar tendons of Sprague‒Dawley rats. Cyclic uniaxial stretching with 4% or 8% strain at 0.5 Hz for 8 h was applied to TDCs. TDCs subjected to 8% strain were treated with epigallocatechin gallate (EGCG), piracetam, or no medication. Genes representing non-tenocyte lineage (Pparg, Sox9, and Runx2) and type I and type III collagen were analyzed by quantitative polymerase chain reaction. The 8% strain group showed increased expression of non-tenocyte lineage genes and type III/type I collagen ratios compared with the control and 4% strain groups, and the increased expression was ameliorated with addition of EGCG and piracetam. The model developed in this work could be applied to future research on the pathophysiology of tendinopathy and development of treatment options for the disease. Repression of oxidative stress diminishes the expression of genes indicating aberrant differentiation in a rat cell model, which indicates potential therapeutic intervention of tendinopathy, the often relentlessly degenerate condition.


Asunto(s)
Diferenciación Celular , Estrés Oxidativo , Tenocitos/citología , Tenocitos/metabolismo , Animales , Biomarcadores , Técnicas de Cultivo de Célula , Diferenciación Celular/genética , Expresión Génica , Inmunofenotipificación , Estrés Oxidativo/efectos de los fármacos , Fenotipo , Ratas , Tendinopatía/etiología , Tendinopatía/metabolismo , Tendinopatía/patología , Tendones/citología , Tendones/metabolismo , Tenocitos/efectos de los fármacos
14.
Plant Biotechnol J ; 16(11): 1878-1891, 2018 11.
Artículo en Inglés | MEDLINE | ID: mdl-29577566

RESUMEN

Starch is the main form of energy storage in higher plants. Although several enzymes and regulators of starch biosynthesis have been defined, the complete molecular machinery remains largely unknown. Screening for irregularities in endosperm formation in rice represents valuable prospect for studying starch synthesis pathway. Here, we identified a novel rice white-core endosperm and defective grain filling mutant, ospk2, which displays significantly lower grain weight, decreased starch content and alteration of starch physicochemical properties when compared to wild-type grains. The normal starch compound granules were drastically reduced and more single granules filled the endosperm cells of ospk2. Meanwhile, the germination rate of ospk2 seeds after 1-year storage was observably reduced compared with wild-type. Map-based cloning of OsPK2 indicated that it encodes a pyruvate kinase (PK, ATP: pyruvate 2-O-phosphotransferase, EC 2.7.1.40), which catalyses an irreversible step of glycolysis. OsPK2 has a constitutive expression in rice and its protein localizes in chloroplasts. Enzyme assay showed that the protein product from expressed OsPK2 and the crude protein extracted from tissues of wild-type exhibits strong PK activity; however, the mutant presented reduced protein activity. OsPK2 (PKpα1) and three other putative rice plastidic isozymes, PKpα2, PKpß1 and PKpß2, can interact to form heteromer. Moreover, the mutation leads to multiple metabolic disorders. Altogether, these results denote new insights into the role of OsPK2 in plant seed development, especially in starch synthesis, compound granules formation and grain filling, which would be useful for genetic improvement of high yield and rice grain quality.


Asunto(s)
Grano Comestible/crecimiento & desarrollo , Endospermo/crecimiento & desarrollo , Genes de Plantas/genética , Oryza/genética , Proteínas de Plantas/genética , Piruvato Quinasa/genética , Almidón/biosíntesis , Endospermo/metabolismo , Genes de Plantas/fisiología , Oryza/enzimología , Oryza/crecimiento & desarrollo , Oryza/metabolismo , Proteínas de Plantas/metabolismo , Proteínas de Plantas/fisiología , Piruvato Quinasa/metabolismo , Piruvato Quinasa/fisiología
15.
Magn Reson Med ; 80(5): 2202-2214, 2018 11.
Artículo en Inglés | MEDLINE | ID: mdl-29687915

RESUMEN

PURPOSE: An end-to-end deep convolutional neural network (CNN) based on deep residual network (ResNet) was proposed to efficiently reconstruct reliable T2 mapping from single-shot overlapping-echo detachment (OLED) planar imaging. METHODS: The training dataset was obtained from simulations that were carried out on SPROM (Simulation with PRoduct Operator Matrix) software developed by our group. The relationship between the original OLED image containing two echo signals and the corresponding T2 mapping was learned by ResNet training. After the ResNet was trained, it was applied to reconstruct the T2 mapping from simulation and in vivo human brain data. RESULTS: Although the ResNet was trained entirely on simulated data, the trained network was generalized well to real human brain data. The results from simulation and in vivo human brain experiments show that the proposed method significantly outperforms the echo-detachment-based method. Reliable T2 mapping with higher accuracy is achieved within 30 ms after the network has been trained, while the echo-detachment-based OLED reconstruction method took approximately 2 min. CONCLUSION: The proposed method will facilitate real-time dynamic and quantitative MR imaging via OLED sequence, and deep convolutional neural network has the potential to reconstruct maps from complex MRI sequences efficiently.


Asunto(s)
Aprendizaje Profundo , Imagen Eco-Planar/métodos , Procesamiento de Imagen Asistido por Computador/métodos , Adulto , Algoritmos , Encéfalo/diagnóstico por imagen , Simulación por Computador , Humanos , Fantasmas de Imagen
16.
J Exp Bot ; 68(18): 5147-5160, 2017 Nov 02.
Artículo en Inglés | MEDLINE | ID: mdl-29045742

RESUMEN

The plastid-encoded RNA polymerase (PEP) plays an important role in the transcription machinery of mature chloroplasts, yet details of its function remain elusive in rice. Here, we identified a novel PEP-associated protein (PAP), WLP2, based on its two allelic white leaf and panicle mutants, wlp2s and wlp2w. The two mutants were albino lethal at high temperatures and showed decreased chlorophyll accumulation, abnormal chloroplast ultrastructure, and attenuated photosynthetic activity. Map-based cloning suggested that WLP2 encodes a putative pfkB-type carbohydrate kinase family protein, which is homologous to fructokinase-like 1 (AtFLN1) in Arabidopsis. WLP2 is mainly expressed in green tissues and its protein localizes in chloroplasts. Expression levels of PEP-encoded genes, chloroplast development genes and photosynthesis-related genes were compromised in wlp2 mutants, indicating that WLP2 is essential for normal chloroplast biogenesis. Moreover, WLP2 and its paralog OsFLN2 can physically interact with thioredoxin OsTRXz to form a TRX-FLN regulatory module, which not only regulates transcription of the PEP-encoded genes but also maintains the redox balance in chloroplasts under heat stress. Furthermore, the wlp2w mutant gene represents a potential advantage in enhancing seed purity and high-throughput breeding. Our results strongly indicate that WLP2 protects chloroplast development from heat stress via a TRX-FLN regulatory module in rice.


Asunto(s)
Proteínas de Arabidopsis/metabolismo , Cloroplastos/enzimología , Cloroplastos/fisiología , Oryza/enzimología , Fosfotransferasas (Aceptor de Grupo Alcohol)/metabolismo , Proteínas de Plantas/metabolismo , Proteínas de Arabidopsis/genética , Clorofila/metabolismo , Mapeo Cromosómico , ARN Polimerasas Dirigidas por ADN/metabolismo , Calor , Mutación , Oryza/genética , Oryza/fisiología , Oxidación-Reducción , Fenotipo , Fosfotransferasas (Aceptor de Grupo Alcohol)/genética , Hojas de la Planta/enzimología , Hojas de la Planta/genética , Hojas de la Planta/fisiología , Proteínas de Plantas/genética , Semillas/enzimología , Semillas/genética , Semillas/fisiología , Estrés Fisiológico , Tiorredoxinas/metabolismo
17.
Aust N Z J Psychiatry ; 49(1): 65-73, 2015 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-25313258

RESUMEN

OBJECTIVE: Repetition of suicide attempts is common, but little is known about the relationship between switching methods of suicide attempt and the probability of completed suicide. This study aimed to determine the transition of methods chosen by individuals who repeat suicide attempts, and how the switched methods of suicide attempts influence the risk of suicide death. METHOD: All consecutive individuals (n = 2052) with an episode of non-fatal suicide attempt registered in a surveillance database provided by the Department of Health of the Keelung City Government from 1 January 2006 to 31 December 2010 were enrolled and followed up until the end of 2011. The earliest attempt recorded in the database was defined as the index attempt. Data on the time of subsequent completed suicide and methods chosen for repeated self-harm during the follow-up period were analyzed by performing a Cox proportional hazards regression. RESULTS: Of the total subjects, 374 (18.2%) had at least one other attempted suicide and 50 (2.4%) eventually died by suicide. Subjects who used highly lethal methods in the index self-harm tended to switch methods in the next suicide attempt (p<0.001). Switching to a more lethal method was a significant predictor of completed suicide (adjusted hazard ratio (aHR) 7.05, 95% confidence interval (CI) 3.52-14.14). In addition, subjects who used charcoal-burning in the index self-harm attempt had a higher risk of subsequent suicide death (aHR 3.47, 95% CI 1.57-7.68). CONCLUSIONS: The findings in this study give us some insight into the patterns of methods in repeat suicide attempters. The intent behind switching methods of suicide attempt might be considered as an important item of clinical assessment of the seriousness of suicidal behavior.


Asunto(s)
Suicidio/estadística & datos numéricos , Adulto , Anciano , Estudios de Cohortes , Femenino , Humanos , Masculino , Persona de Mediana Edad , Conducta Autodestructiva/epidemiología , Conducta Autodestructiva/psicología , Suicidio/psicología , Intento de Suicidio/psicología , Intento de Suicidio/estadística & datos numéricos , Taiwán/epidemiología
18.
Am J Transl Res ; 16(3): 998-1008, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38586107

RESUMEN

OBJECTIVE: To assess the impact of memory therapy on enhancing recovery of postoperative cognitive function and alleviating mood disturbances in brain glioma patients. METHODS: This retrospective study included 160 brain glioma patients who met the inclusion criteria from August 2019 to July 2022. They were divided into a control group and an observation group according to according to different treatment method, with 80 cases in each group. The control group was given routine rehabilitation, while the observation group received additional memory therapy. The study compared complications between the two groups, focusing on the changes in cognitive function [using the Neurobehavioral Cognitive Status Check Scale (NCSE), Clinical Dementia Score (CDR)], mood disturbances [measured by the State Anxiety Scale (S-AI), Trait Anxiety Scale (T-AI), and Hospital Stress Scale score], health-promoting behaviors [evaluated with the Chinese Version of Health Promotion Lifestyle Scale-II (HPLP-II)], coping styles [assessed through the Medical Response Questionnaire (MCQM)], and cancer-related fatigue [using the Cancer-Related Fatigue Scale (CFS)] before and after intervention were observed. A total of 160 glioma cases were classified into either a good or poor prognosis category, based on their prognosis 12 months post-surgery. Baseline data from both groups were compared, and multivariate logistic regression was employed to analyze the factors influencing outcomes in glioma patients. RESULTS: After intervention, the observation group exhibited higher scores of NCSE, HPLP-II, and CFS, but lower scores on the CDR, S-AI, T-AI and hospital stress scale compared to the control group (all P<0.05). Additionally, within the MCQM, the observation group showed reduced avoidance and yield scores, and an increased facing score, compared to the control group (all P<0.05). No significant difference was observed between the complication rates of the control (8.75%) and observation groups (3.75%) (P>0.05). However, the incidence of adverse prognosis was significantly lower in the observation group compared to the control group (8.75% vs 22.50%) (P<0.05). There were no significant differences in age, maximum tumor diameter, preoperative Karnofsky Performance Status score, gender or lesion location between the poor prognosis group and the good prognosis group (all P>0.05). The poor prognosis group had a higher proportion of patients in clinical stages III-IV and a lower proportion receiving recall therapy compared to good prognosis group (P<0.05). Multivariate logistic regression analysis identified clinical stage (III-IV stage) [OR=3.562 (95% CI: 1.476-8.600)] as a risk factor for poor prognosis after brain glioma surgery (P<0.05), while undergoing memory therapy [ß=0.330 (95% CI: 0.99-0.842)] acted as a protective factor against poor prognosis (P<0.05). CONCLUSION: Memory therapy has been shown to promote postoperative cognitive function recovery in glioma patients, reduce anxiety and stress response, bolster coping mechanisms and health-promoting behavior, diminish cancer-related fatigue, and improve patient prognosis.

19.
Sci Rep ; 14(1): 9781, 2024 04 29.
Artículo en Inglés | MEDLINE | ID: mdl-38684733

RESUMEN

There is a certain relationship between alexithymia and depression, but further investigation is needed to explore their underlying mechanisms. The aims of this study was to explore the mediating role of internet addiction between alexithymia and depression and the moderating role of physical activity. A total of 594 valid responses were included in the analysis, with a mean age of 18.72 years (SD = 1.09). The sample comprised 250 males (42.09%) and 344 females (57.91%). These responses were utilized for descriptive analysis, correlation analysis, regression analysis, and the development of mediation and moderation models. Alexithymia showed positive correlations with depression and internet addiction, and physical activity was negatively correlated with internet addiction and depression. Internet addiction partially mediated the relationship between alexithymia and depression, while physical activity weakened the association between internet addiction and depression, acting as a moderator. Our findings suggest that excessive Internet engagement may mediate the relationship between alexithymia and depression as an emotional regulatory coping strategy, and that physical activity attenuates the predictive effect of Internet addiction on depression.


Asunto(s)
Síntomas Afectivos , Depresión , Ejercicio Físico , Trastorno de Adicción a Internet , Humanos , Trastorno de Adicción a Internet/epidemiología , Depresión/epidemiología , Depresión/etiología , Depresión/prevención & control , Síntomas Afectivos/complicaciones , Síntomas Afectivos/epidemiología , Ejercicio Físico/psicología , China/epidemiología , Estudiantes , Correlación de Datos , Masculino , Femenino , Adolescente , Adulto Joven , Análisis de Regresión
20.
Med Image Anal ; 95: 103188, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38718715

RESUMEN

In medical image diagnosis, fairness has become increasingly crucial. Without bias mitigation, deploying unfair AI would harm the interests of the underprivileged population and potentially tear society apart. Recent research addresses prediction biases in deep learning models concerning demographic groups (e.g., gender, age, and race) by utilizing demographic (sensitive attribute) information during training. However, many sensitive attributes naturally exist in dermatological disease images. If the trained model only targets fairness for a specific attribute, it remains unfair for other attributes. Moreover, training a model that can accommodate multiple sensitive attributes is impractical due to privacy concerns. To overcome this, we propose a method enabling fair predictions for sensitive attributes during the testing phase without using such information during training. Inspired by prior work highlighting the impact of feature entanglement on fairness, we enhance the model features by capturing the features related to the sensitive and target attributes and regularizing the feature entanglement between corresponding classes. This ensures that the model can only classify based on the features related to the target attribute without relying on features associated with sensitive attributes, thereby improving fairness and accuracy. Additionally, we use disease masks from the Segment Anything Model (SAM) to enhance the quality of the learned feature. Experimental results demonstrate that the proposed method can improve fairness in classification compared to state-of-the-art methods in two dermatological disease datasets.


Asunto(s)
Enfermedades de la Piel , Humanos , Enfermedades de la Piel/diagnóstico por imagen , Aprendizaje Profundo , Interpretación de Imagen Asistida por Computador/métodos , Demografía
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