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1.
Front Chem ; 12: 1386076, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38638876

RESUMEN

The advancements in the field of micro-robots for drug delivery systems have garnered considerable attention. In contrast to traditional drug delivery systems, which are dependent on blood circulation to reach their target, these engineered micro/nano robots possess the unique ability to navigate autonomously, thereby enabling the delivery of drugs to otherwise inaccessible regions. Precise drug delivery systems can improve the effectiveness and safety of synthetic lethality strategies, which are used for targeted therapy of solid tumors. MYC-overexpressing tumors show sensitivity to CDK1 inhibition. This study delves into the potential of Ro-3306 loaded magnetic-driven hydrogel micro-robots in the treatment of MYC-dependent osteosarcoma. Ro-3306, a specific inhibitor of CDK1, has been demonstrated to suppress tumor growth across various types of cancer. We have designed and fabricated this micro-robot, capable of delivering Ro-3306 precisely to tumor cells under the influence of a magnetic field, and evaluated its chemosensitizing effects, thereby augmenting the therapeutic efficacy and introducing a novel possibility for osteosarcoma treatment. The clinical translation of this method necessitates further investigation and validation. In summary, the Ro-3306-loaded magnetic-driven hydrogel micro-robots present a novel strategy for enhancing the chemosensitivity of MYC-dependent osteosarcoma, paving the way for new possibilities in future clinical applications.

2.
Environ Int ; 186: 108598, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38531236

RESUMEN

A pH-responsive colorimetric method based on dual-enzyme catalysis for rapid and facile detection and quantification of nanoPET at environment-dependent concentration is proposed. The nanoPET was hydrolyzed by the synergistic catalysis of cutinase and lipase to terephthalic acid which can be sensitive detected using bromocresol purple as the indicator. The color changed from purple to bright yellow as the nanoPET detection concentration increased from 0 mg/mL to 2 mg/mL which can be detected by UV-Vis. This naked-eye method has a high sensitivity for nanoPET detection with the visual detection cutoff of 31.00 µg/mL, and has a good linearity in the range of 0 âˆ¼ 1 mg/mL with LOD of 22.84 µg/mL. The reliability of this method is verified in the detection of nanoPET in lake water and beer samples, with an average recovery of 87.1 %. The as-developed dual-enzyme colorimetric chemosensor holds promising potential as a robust and effective platform for the sensitive detection of nanoPET.


Asunto(s)
Colorimetría , Lagos , Ácidos Ftálicos , Colorimetría/métodos , Concentración de Iones de Hidrógeno , Lagos/química , Ácidos Ftálicos/análisis , Lipasa/metabolismo , Cerveza/análisis , Catálisis
3.
Spectrochim Acta A Mol Biomol Spectrosc ; 311: 123988, 2024 Apr 15.
Artículo en Inglés | MEDLINE | ID: mdl-38324948

RESUMEN

Trivalent chromium (Cr3+) causes serious environmental pollution, degradation of the quality of edible agricultural products and human diseases. A novel phenanthro[9,10-d]imidazole-derived conjugated polymers (PIPF) was obtained from 4-(5,10-dibromo-1H-phenanthro[9,10-d]imidazol-2-yl)phenol and diethyl 4,4'-(2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9H-fluorene-9,9-diyl)dibutyrate by Suzuki polymerization reaction, which was reasonably demonstrated by 1H NMR spectroscopy, infrared spectroscopy and quantum chemical calculations. The PIPF exhibits a "turn-on" fluorescence response to Cr3+ in DMSO/H2O (98:2, v/v) with naked-eye detection. The limit of detection for Cr3+ was calculated to be 0.073 µM with a linear range of 3-9 µM. The possible mechanism of the PIPF-based Cr3+ fluorescence "turn-on" sensor is due to the inhibition of the PET process by the coordination of Cr3+ to the hexaalkyl ester carbon chain of PIPF (RCOO-). The high sensitivity, good selectivity, and utility of this sensor indicated that PIPF-based "turn-on" fluorescence sensor is a potential fluorescence application for measuring Cr3+ in environmental samples.

4.
Front Bioeng Biotechnol ; 12: 1353660, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38314349

RESUMEN

Using micro/nanorobots (MNRs) for targeted therapy within the human body is an emerging research direction in biomedical science. These nanoscale to microscale miniature robots possess specificity and precision that are lacking in most traditional treatment modalities. Currently, research on electrically controlled micro/nanorobots is still in its early stages, with researchers primarily focusing on the fabrication and manipulation of these robots to meet complex clinical demands. This review aims to compare the fabrication, powering, and locomotion of various electrically controlled micro/nanorobots, and explore their advantages, disadvantages, and potential applications.

5.
Signal Transduct Target Ther ; 9(1): 26, 2024 Feb 02.
Artículo en Inglés | MEDLINE | ID: mdl-38302461

RESUMEN

Alternative splicing (AS) serves as a pivotal mechanism in transcriptional regulation, engendering transcript diversity, and modifications in protein structure and functionality. Across varying tissues, developmental stages, or under specific conditions, AS gives rise to distinct splice isoforms. This implies that these isoforms possess unique temporal and spatial roles, thereby associating AS with standard biological activities and diseases. Among these, AS-related RNA-binding proteins (RBPs) play an instrumental role in regulating alternative splicing events. Under physiological conditions, the diversity of proteins mediated by AS influences the structure, function, interaction, and localization of proteins, thereby participating in the differentiation and development of an array of tissues and organs. Under pathological conditions, alterations in AS are linked with various diseases, particularly cancer. These changes can lead to modifications in gene splicing patterns, culminating in changes or loss of protein functionality. For instance, in cancer, abnormalities in AS and RBPs may result in aberrant expression of cancer-associated genes, thereby promoting the onset and progression of tumors. AS and RBPs are also associated with numerous neurodegenerative diseases and autoimmune diseases. Consequently, the study of AS across different tissues holds significant value. This review provides a detailed account of the recent advancements in the study of alternative splicing and AS-related RNA-binding proteins in tissue development and diseases, which aids in deepening the understanding of gene expression complexity and offers new insights and methodologies for precision medicine.


Asunto(s)
Empalme Alternativo , Neoplasias , Humanos , Empalme Alternativo/genética , Isoformas de Proteínas/genética , Isoformas de Proteínas/metabolismo , Proteínas de Unión al ARN/genética , Proteínas de Unión al ARN/metabolismo , Neoplasias/genética
6.
J Control Release ; 367: 604-619, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38295997

RESUMEN

Mitochondrial dysfunction is a pivotal event in Alzheimer's disease (AD) pathogenesis. Lithospermic acid B (LA) has shown promise in safeguarding mitochondria, yet the underlying mechanism remains elusive. Here, we present evidence that LA rejuvenated AD-related mitochondrial pool by co-activating mitophagy and mitochondria biogenesis via PINK1/LC3B/P62 and PGC-1α/Nrf2. To advance in vivo application, hydrophilic LA was encapsulated in liposome (MT-LIP@LA) composed of D-mannosamine-cholesterol/DSPE-PEG2000-Tet1/lecithin (molar ratio, 3:0.3:10) for cascaded brain-neuron targeting. MT-LIP demonstrated 4.3-fold enhanced brain accumulation (2.57%dose/g-brain) than LIP (0.60%dose/g-brain) and precisely targeted neurons at AD lesion sites. Mechanism studies unraveled factors contributing to the preeminent brain targeting ability of MT-LIP: (1) high-density modified mannose efficiently binds to glucose transporter 1 (GLUT1) on blood-brain barrier (BBB); (2) prone to trafficking towards caveolin-Golgi pathway during transcytosis. This augmented therapeutic platform efficiently restored mitochondrial health, prevented neurodegeneration, and ameliorated memory deficits in 3 × Tg-AD transgenic mice. Our studies revealed the underlying pharmacological mechanism of LA and provided a concise but efficient platform for neuronal mitochondria quality control in vivo.


Asunto(s)
Enfermedad de Alzheimer , Benzofuranos , Depsidos , Ratones , Animales , Enfermedad de Alzheimer/metabolismo , Liposomas/metabolismo , Mitocondrias/metabolismo , Encéfalo/metabolismo , Ratones Transgénicos
7.
Pestic Biochem Physiol ; 196: 105589, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-37945240

RESUMEN

UDP-glycosyltransferase (UGT) is the major detoxification enzymes of phase II involved in xenobiotics metabolism, which potentially mediates the formation of insect resistance. Previous transcriptome sequencing studies have found that several UGT genes were upregulated in indoxacarb resistant strains of Spodoptera litura, but whether these UGT genes were involved in indoxacarb resistance and their functions in resistance were unclear. In this study, the UGTs inhibitor, 5-nitrouracil, enhanced the toxicity of indoxacarb against S. litura, preliminarily suggesting that UGTs were participated in indoxacarb resistance. Two UGT genes, UGT33J17 and UGT41D10 were upregulated in the resistant strains and could be induced by indoxacarb. Alignment of UGT protein sequences revealed two conserved donor-binding regions with several key residues that interact with catalytic sites and sugar donors. Further molecular modeling and docking analysis indicated that two UGT proteins were able to stably bind indoxacarb and N-decarbomethoxylated metabolite (DCJW). Furthermore, knockdown of UGT33J17 and UGT41D10 decreased viability of Spli-221 cells and enhanced susceptibility of larvae to indoxacarb. Transgenic overexpression of these genes reduced the toxicity of indoxacarb in Drosophila melanogaster. This work revealed that upregulation of UGT genes significantly contributes to indoxacarb resistance in S. litura, and is of great significance for the development of integrated and sustainable management strategies for resistant pests in the field.


Asunto(s)
Insecticidas , Animales , Spodoptera/genética , Spodoptera/metabolismo , Insecticidas/farmacología , Drosophila melanogaster/metabolismo , Larva/genética , Larva/metabolismo , Glicosiltransferasas/genética , Glicosiltransferasas/metabolismo , Uridina Difosfato
8.
BMC Womens Health ; 23(1): 435, 2023 08 17.
Artículo en Inglés | MEDLINE | ID: mdl-37592252

RESUMEN

BACKGROUND: Improving the coverage rate of cervical cancer screening is a challenge mission for cervical cancer elimination. This study attempted to assess the knowledge, willingness, and uptake of cervical cancer screening services among Chinese females and determined associated factors. METHODS: This is a cross-sectional online survey conducted in China from March to April 2022. Information on demographic characteristics, knowledge, willingness, and uptake of cervical cancer screening was collected through a large e-commerce platform. Women aged 18-65 were included in the analysis. Logistic regression analysis was employed to detect the possible factors associated with knowledge, willingness, and screening participation. RESULTS: A total of 4518 women (37.83 ± 9.14 years) were included in the final analysis, of whom 87.16% (n = 3938) lived in urban areas. About 93.40% (n = 4220) of the respondents reported hearing of cervical cancer screening. The median score of knowledge about cervical cancer was 16 out of 26. Over 84% (n = 3799) of the respondents were willing to receive regular cervical cancer screening. Nearly 40% (n = 1785) had never received cervical cancer screening. Among the screened women, 21.26% (n = 581), 35.24% (n = 1151), and 42.37% (n = 1158) were screened through a national cervical cancer screening program, employee physical examination, and self-paid physical examination, respectively. Knowledge was positively associated with willingness and screening participation. Age, marital status, occupation, monthly household income, and HPV vaccination history could influence screening participation (all p < 0.05). CONCLUSIONS: Though women had high-level awareness and strong participation willingness in cervical cancer screening, the overall screening coverage among Chinese women was still low. Besides, the knowledge about cervical cancer was still limited. Comprehensive health education should be enhanced by utilizing social media platforms and medical workers. It is also important to promote national free cervical cancer screening with high-performance screening methods.


Asunto(s)
Detección Precoz del Cáncer , Conocimientos, Actitudes y Práctica en Salud , Neoplasias del Cuello Uterino , Adulto , Femenino , Humanos , Comercio , Estudios Transversales , Detección Precoz del Cáncer/estadística & datos numéricos , Pueblos del Este de Asia , Neoplasias del Cuello Uterino/diagnóstico , Neoplasias del Cuello Uterino/epidemiología , Accesibilidad a los Servicios de Salud , China , Adolescente , Adulto Joven , Persona de Mediana Edad , Anciano
9.
Curr Issues Mol Biol ; 45(7): 5305-5316, 2023 Jun 25.
Artículo en Inglés | MEDLINE | ID: mdl-37504253

RESUMEN

This review presents a systematic analysis of the studies on volatiles in Dendrobium. Among the various components, aromatic terpenes are a crucial component in the development of the aromatic characteristics of Dendrobium and other plants. Recent advancements in detection and sequencing technology have resulted in a considerable rise in research on the biosynthetic processes of aromatic terpenes in Dendrobium and other flowering plants. Nevertheless, the inquiry into the precise means by which plants regulate the proportion of diverse aromatic terpenes in their floral scent, thereby preserving their olfactory traits, requires further investigation. A conjecture on the botanical perfumer mechanism, which condensed the findings of earlier studies, was put forward to address this area of interest. Specific transcription factors likely govern the coordinated expression of multiple key terpene synthase (TPS) genes during the flowering stage of plants, thereby regulating the proportional biosynthesis of diverse aromatic terpenes and sustaining the distinctive aromatic properties of individual plants. This review serves as a significant theoretical reference for further investigations into aromatic volatile compounds in Dendrobium.

10.
Shock ; 60(2): 238-247, 2023 08 01.
Artículo en Inglés | MEDLINE | ID: mdl-37314209

RESUMEN

ABSTRACT: T cell exhaustion is the main cause of sepsis-induced immunosuppression and is associated with the poor prognosis. Nicotinamide adenine dinucleotide (NAD + ) is well known for its anti-aging effect, but its role in sepsis-induced T cell exhaustion remains to be elucidated. In the present study, using a classic septic animal model, we found that the levels of NAD + and its downstream molecule, which is sirtuins 1 (SIRT1), in T cells in sepsis were decreased. Supplementation with nicotinamide ribose (NR), the precursor of NAD + , right after cecal ligation and puncture significantly increased the levels of NAD + and SIRT1. Supplementation with NR alleviated the depletion of mononuclear cells and T lymphocytes in spleen in sepsis and increased the levels of CD3 + CD4 + and CD3 + CD8 + T cells. Interestingly, both Th1 and Th2 cells were expanded after NR treatment, but the balance of Th1/Th2 was partly restored. Nicotinamide ribose also inhibited the regulatory T cells expansion and programmed cell death 1 expression in CD4 + T cells in sepsis. In addition, the bacteria load, organ damage (lung, heart, liver, and kidney), and the mortality of septic mice were reduced after NR supplementation. In summary, these results demonstrate the beneficial effect of NR on sepsis and T cell exhaustion, which is associated with NAD + /SIRT1 pathway.


Asunto(s)
NAD , Sepsis , Ratones , Animales , NAD/metabolismo , Sirtuina 1 , Agotamiento de Células T , Suplementos Dietéticos , Sepsis/tratamiento farmacológico
11.
Micromachines (Basel) ; 14(5)2023 Apr 29.
Artículo en Inglés | MEDLINE | ID: mdl-37241607

RESUMEN

Targeted drug delivery using micro-nano robots (MNRs) is a rapidly advancing and promising field in biomedical research. MNRs enable precise delivery of drugs, addressing a wide range of healthcare needs. However, the application of MNRs in vivo is limited by power issues and specificity in different scenarios. Additionally, the controllability and biological safety of MNRs must be considered. To overcome these challenges, researchers have developed bio-hybrid micro-nano motors that offer improved accuracy, effectiveness, and safety for targeted therapies. These bio-hybrid micro-nano motors/robots (BMNRs) use a variety of biological carriers, blending the benefits of artificial materials with the unique features of different biological carriers to create tailored functions for specific needs. This review aims to give an overview of the current progress and application of MNRs with various biocarriers, while exploring the characteristics, advantages, and potential hurdles for future development of these bio-carrier MNRs.

12.
Plant Physiol ; 192(3): 2261-2275, 2023 07 03.
Artículo en Inglés | MEDLINE | ID: mdl-37040571

RESUMEN

Suboptimal nitrogen availability is a primary constraint to plant growth. We used OpenSimRoot, a functional-structural plant/soil model, to test the hypothesis that larger root cortical cell size (CCS), reduced cortical cell file number (CCFN), and their interactions with root cortical aerenchyma (RCA) and lateral root branching density (LRBD) are useful adaptations to suboptimal soil nitrogen availability in maize (Zea mays). Reduced CCFN increased shoot dry weight over 80%. Reduced respiration, reduced nitrogen content, and reduced root diameter accounted for 23%, 20%, and 33% of increased shoot biomass, respectively. Large CCS increased shoot biomass by 24% compared with small CCS. When simulated independently, reduced respiration and reduced nutrient content increased the shoot biomass by 14% and 3%, respectively. However, increased root diameter resulting from large CCS decreased shoot biomass by 4% due to an increase in root metabolic cost. Under moderate N stress, integrated phenotypes with reduced CCFN, large CCS, and high RCA improved shoot biomass in silt loam and loamy sand soils. In contrast, integrated phenotypes composed of reduced CCFN, large CCS, and reduced LRBD had the greatest growth in silt loam, while phenotypes with reduced CCFN, large CCS, and high LRBD were the best performers in loamy sands. Our results support the hypothesis that larger CCS, reduced CCFN, and their interactions with RCA and LRBD could increase nitrogen acquisition by reducing root respiration and root nutrient demand. Phene synergisms may exist between CCS, CCFN, and LRBD. CCS and CCFN merit consideration for breeding cereal crops with improved nitrogen acquisition, which is critical for global food security.


Asunto(s)
Nitrógeno , Raíces de Plantas , Nitrógeno/metabolismo , Raíces de Plantas/metabolismo , Fitomejoramiento , Suelo/química , Fenotipo , Zea mays/genética , Biomasa
13.
Health Phys ; 124(1): 1-9, 2023 01 01.
Artículo en Inglés | MEDLINE | ID: mdl-36480580

RESUMEN

ABSTRACT: Various low-concentration inert gases, including 222Rn, 133Xe, and 85Kr, pollute the atmosphere near nuclear facilities (e.g., nuclear power plants or reprocessing plants). Owing to the detection limits of instruments, it has become urgent to determine the concentration of these gases efficiently and perform their online monitoring. However, current technologies are limited by low enrichment efficiencies. In this study, a high-pressure, low-flow, large-volume, and high-efficiency adsorption method has been proposed along with a high-temperature, low-pressure, high-flow, and small-volume rapid desorption and collection method, which are based on the gas enrichment principle of activated carbon. The results demonstrated that when dynamic adsorption was implemented using a two-level enrichment method, the final desorbed gas concentration was proportional to the volume ratio of both the large and small activated carbon beds. At a volume ratio of 15:1, 222Rn concentration increased from 110 to 21,016 Bq m-3 after the two-level enrichment; meanwhile, 222Rn concentration increased from 110 to 42,012 Bq m-3 after three-level enrichment. The three-level enrichment technology provides technical support for the enrichment of low-concentration inert gases in the environment, while offering an important technical foundation for improving the monitoring of low-concentration inert gases in specific environments as well as the atmospheric environment.


Asunto(s)
Carbón Orgánico , Radón , Radioisótopos de Xenón
14.
Int J Nurs Sci ; 9(4): 453-459, 2022 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-36285078

RESUMEN

Purpose: This study aimed to develop quality indicators for the care of older adults with disabilities in long-term care facilities (LTCFs) based on Maslow's hierarchy of needs. Methods: The draft of the quality indicators was drawn up based on a literature review and research group discussion. The quality indicators were finalized by two rounds of expert consultation (involving 15 experts) using the Delphi method. The Analytic Hierarchy Process was applied to calculate the indicators' weight. Results: The response rates of the two rounds of consultation were 100% and 93%, and the expert authority coefficients were 0.86 and 0.87. After two rounds of consultation, the expert opinion coordination coefficients of the first-, second- and third-level indicators were 0.42, 0.25, and 0.96, respectively (P < 0.05), and the variation coefficient was ≤0.25. The final quality indicators for the care of older adults with disabilities in LTCFs included 7 first-level, 19 second-level, and 107 third-level indicators. Conclusion: The quality indicators for the care of older adults with disabilities in LTCFs are reliable, scientific, comprehensive, and practical and specify the content of person-centered care needs. This can provide a reference for evaluating and improving care quality in LTCFs.

15.
J Adv Res ; 42: 1-16, 2022 12.
Artículo en Inglés | MEDLINE | ID: mdl-35988902

RESUMEN

INTRODUCTION: Rice, Oryza sativa L. (Os), is one of the oldest domesticated cereals that has also gone through extensive improvement in modern breeding. OBJECTIVES: How rice was domesticated and impacted by modern breeding. METHODS: We performed comprehensive analyses of genomic sequences of 504 accessions of Os and 456 accessions of O. rufipogon/O. nivara (Or). RESULTS: The natural selection on Or before domestication and the natural and artificial selection during domestication together shaped the well-differentiated genomes of two subspecies, geng(j) (japonica) and xian(i) (indica), while breeding has made apparent genomic imprints between landrace and modern varieties of each subspecies, and also between primary modern and advanced modern varieties of xian(i). Selection during domestication and breeding left genome-wide selective signals covering âˆ¼ 22.8 % and âˆ¼ 8.6 % of the Os genome, significantly reduced within-population genomic diversity by âˆ¼ 22 % in xian(i) and âˆ¼ 53 % in geng(j) plus more pronounced subspecific differentiation. Only âˆ¼ 10 % reduction in the total genomic diversity was observed between the Os and Or populations, indicating domestication did not suffer severe genetic bottleneck. CONCLUSION: Our results revealed clear differentiation of the Or accessions into three large populations, two of which correspond to the well-differentiated Os subspecies, geng(j) and xian(i). Improved productivity and common changes in the same suit of adaptive traits in xian(i) and geng(j) during domestication and breeding resulted apparently from compensatory and convergent selections for different genes/alleles acting in the common KEGG terms and/or same gene families, and thus maintaining or even increasing the within population diversity and subspecific differentiation of Os, while more genes/alleles of novel function were selected during domestication than modern breeding. Our results supported the multiple independent domestication of Os in Asia and suggest the more efficient utilization of the rich diversity within Os by exploiting inter-subspecific and among population diversity in future rice improvement.


Asunto(s)
Oryza , Oryza/genética , Domesticación , Productos Agrícolas/genética , Fitomejoramiento , Genómica
16.
Sensors (Basel) ; 22(13)2022 Jun 21.
Artículo en Inglés | MEDLINE | ID: mdl-35808158

RESUMEN

In this study, an innovative sensor was designed to detect the key combustion parameters of the marine natural gas engine. Based on the ion current, any engine structurally modified was avoided and the real-time monitoring for the combustion process was realized. For the general applicability of the proposed sensor, the ion current generated by a high-energy ignition system was acquired in a wide operating range of the engine. It was found that engine load, excess air coefficient (λ) and ignition timing all generated great influence on both the chemical and thermal phases, which indicated that the ion current was highly correlated with the combustion process in the cylinder. Furthermore, the correlations between the 5 ion current-related parameters and the 10 combustion-related parameters were analyzed in detail. The results showed that most correlation coefficients were relatively high. Based on the aforementioned high correlation, the novel sensor used an on-line algorithm at the basis of neural network models. The models took the characteristic values extracted from the ion current as the inputs and the key combustion parameters as the outputs to realize the online combustion sensing. Four neural network models were established according to the existence of the thermal phase peak of the ion current and two different network structures (BP and RBF). Finally, the predicted values of the four models were compared with the experimental values. The results showed that the BP (with thermal) model had the highest prediction accuracy of phase parameters and amplitude parameters of combustion. Meanwhile, RBF (with thermal) model had the highest prediction accuracy of emission parameters. The mean absolute percentage errors (MAPE) were mostly lower than 0.25, which proved a high accuracy of the proposed ion current-based virtual sensor for detecting the key combustion parameters.


Asunto(s)
Quemaduras , Emisiones de Vehículos , Gasolina , Humanos , Gas Natural , Redes Neurales de la Computación
17.
Cell Rep ; 39(1): 110642, 2022 04 05.
Artículo en Inglés | MEDLINE | ID: mdl-35385725

RESUMEN

Mutation or disruption of the Shank/ProSAP family of genes is a high risk factor for autism spectrum disorders (ASDs) and intellectual disability. N-methyl-D-aspartate glutamate receptor (NMDAR) dysfunction contributes to the development of autism-like behaviors. However, the molecular mechanism of Shank-mediated NMDAR modulation is still not clear. Here, we show that the scaffold protein plenty of SH3s (POSH) directly interacts with two other scaffold proteins, PSD95 and SHANK2/3, at excitatory synapses. In POSH conditional knockout (cKO) mice, normal synaptic clustering of NMDAR/PSD-95/SHANK complex is disrupted, accompanied by abnormal dendritic spine development and glutamatergic transmission in hippocampal neurons. POSH cKO mice display profound autism-like behaviors, including impairments in social interactions, social communication, repetitive behaviors, and deficits in learning and memory. Thus, POSH clusters at the postsynaptic density (PSD) with PSD-95 and SHANK2/3 and plays important roles in the signaling mechanisms of the NMDAR/PSD-95/POSH/SHANK complex as well as in spine development and brain function.


Asunto(s)
Proteínas Adaptadoras Transductoras de Señales , Ácido Aspártico , Proteínas del Citoesqueleto , Ácido Glutámico , Receptores de N-Metil-D-Aspartato , Proteínas Adaptadoras Transductoras de Señales/metabolismo , Animales , Ácido Aspártico/metabolismo , Proteínas del Citoesqueleto/metabolismo , Homólogo 4 de la Proteína Discs Large/metabolismo , Ácido Glutámico/metabolismo , Ratones , Proteínas del Tejido Nervioso/genética , Proteínas del Tejido Nervioso/metabolismo , Receptores de N-Metil-D-Aspartato/metabolismo , Sinapsis/metabolismo , Transmisión Sináptica
18.
Mitochondrial DNA B Resour ; 6(7): 1897-1898, 2021 Jun 07.
Artículo en Inglés | MEDLINE | ID: mdl-34151012

RESUMEN

Cymbidium dayanum, a wild orchid species in the Orchid family (Orchidaceae), is considered highly valuable because of its long flowering period and beautiful plant shape. We sequenced the complete chloroplast genome of C. dayanum using the Illumina Hiseq platform (Illumina, San Diego, CA). The size of the C. dayanum chloroplast genome is 155,408 bp, with an average GC content of 36.76%. This chloroplast genome has containing a large single-copy (LSC) region of 84,189 bp, a small single-copy (SSC) region of 17,991 bp, and two inverted (IRa and IRb) repeat regions of two 26,614 bp. A total of 118 unique genes were annotated, including 76 protein-coding genes, 38 tRNA genes, and 4 rRNA genes. A maximum-likelihood phylogenetic tree indicated that C. dayanum is closely related to C. tracyanum in the genus Cymbidium based on 9 whole chloroplast genome sequences.

19.
Int Immunopharmacol ; 90: 107142, 2021 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-33268042

RESUMEN

Acute lung injury (ALI), a common respiratory distress syndrome in the intensive care unit (ICU), is mainly caused by severe infection and shock. Epithelial and capillary endothelial cell injury, interstitial edema and inflammatory cell infiltration are the main pathological changes observed in ALI animal models. Maresin conjugates in tissue regeneration (MCTR) are a new family of anti-inflammatory proteins. MCTR3 is a key enhancer of the host response, that promotes tissue regeneration and reduces infection; however, its role and mechanism in ALI are still unclear. The purpose of our research was to assess the protective effects of MCTR3 against ALI and its underlying mechanism. The work in this study was conducted in a murine model and the pulmonary epithelial cell line MLE-12. In vivo, MCTR3 (2 ng/g) was given 2 h after lipopolysaccharide (LPS) injection. We found that the treatment of mice with LPS-induced ALI with MCTR3 significantly reduced the cell number and protein levels in the bronchoalveolar lavage fluid (BALF); decreased the production of inflammatory cytokines; alleviated oxidative stress and cell apoptosis, consequently decreased lung injury; and restored pulmonary function. These protective effects of MCTR3 were dependent on down-regulation of the PTEN-induced putative kinase 1 (PINK1) pathway. Additionally, in MLE-12 cells stimulated with LPS, MCTR3 inhibited cell death, inflammatory cytokine levels and oxidative stress via the ALX/PINK1 signaling pathway. Thus, we conclude that MCTR3 protected against LPS-induced ALI partly through inactivation of the ALX/PINK1 mediated mitophagy pathway.


Asunto(s)
Lesión Pulmonar Aguda/prevención & control , Proteínas Adaptadoras Transductoras de Señales/metabolismo , Antiinflamatorios/farmacología , Apoptosis/efectos de los fármacos , Células Epiteliales/efectos de los fármacos , Proteínas Quinasas/metabolismo , Lesión Pulmonar Aguda/enzimología , Lesión Pulmonar Aguda/patología , Animales , Línea Celular , Citocinas/metabolismo , Modelos Animales de Enfermedad , Células Epiteliales/enzimología , Células Epiteliales/patología , Mediadores de Inflamación/metabolismo , Lipopolisacáridos , Masculino , Ratones Endogámicos C57BL , Mitocondrias/efectos de los fármacos , Mitocondrias/enzimología , Mitocondrias/patología , Estrés Oxidativo/efectos de los fármacos , Transducción de Señal
20.
Front Plant Sci ; 7: 559, 2016.
Artículo en Inglés | MEDLINE | ID: mdl-27200033

RESUMEN

[This corrects the article on p. 1243 in vol. 6, PMID: 26793220.].

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