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1.
Front Immunol ; 15: 1362543, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38504986

RESUMO

Introduction: Glioblastoma (GBM) presents significant challenges due to its malignancy and limited treatment options. Precision treatment requires subtyping patients based on prognosis. Disulfidptosis, a novel cell death mechanism, is linked to aberrant glucose metabolism and disulfide stress, particularly in tumors expressing high levels of SLC7A11. The exploration of disulfidptosis may provide a new perspective for precise diagnosis and treatment of glioblastoma. Methods: Transcriptome sequencing was conducted on samples from GBM patients treated at Tiantan Hospital (January 2022 - December 2023). Data from CGGA and TCGA databases were collected. Consensus clustering based on disulfidptosis features categorized GBM patients into two subtypes (DRGclusters). Tumor immune microenvironment, response to immunotherapy, and drug sensitivity were analyzed. An 8-gene disulfidptosis-based subtype predictor was developed using LASSO machine learning algorithm and validated on CGGA dataset. Results: Patients in DRGcluster A exhibited improved overall survival (OS) compared to DRGcluster B. DRGcluster subtypes showed differences in tumor immune microenvironment and response to immunotherapy. The predictor effectively stratified patients into high and low-risk groups. Significant differences in IC50 values for chemotherapy and targeted therapy were observed between risk groups. Discussion: Disulfidptosis-based classification offers promise as a prognostic predictor for GBM. It provides insights into tumor immune microenvironment and response to therapy. The predictor aids in patient stratification and personalized treatment selection, potentially improving outcomes for GBM patients.


Assuntos
Glioblastoma , Humanos , Glioblastoma/genética , Glioblastoma/terapia , Multiômica , Imunoterapia , Algoritmos , Morte Celular , Microambiente Tumoral
2.
Sensors (Basel) ; 24(2)2024 Jan 21.
Artigo em Inglês | MEDLINE | ID: mdl-38276378

RESUMO

In factories, human posture recognition facilitates human-machine collaboration, human risk management, and workflow improvement. Compared to optical sensors, inertial sensors have the advantages of portability and resistance to obstruction, making them suitable for factories. However, existing product-level inertial sensing solutions are generally expensive. This paper proposes a low-cost human motion capture system based on BMI 160, a type of six-axis inertial measurement unit (IMU). Based on WIFI communication, the collected data are processed to obtain the displacement of human joints' rotation angles around XYZ directions and the displacement in XYZ directions, then the human skeleton hierarchical relationship was combined to calculate the real-time human posture. Furthermore, the digital human model was been established on Unity3D to synchronously visualize and present human movements. We simulated assembly operations in a virtual reality environment for human posture data collection and posture recognition experiments. Six inertial sensors were placed on the chest, waist, knee joints, and ankle joints of both legs. There were 16,067 labeled samples obtained for posture recognition model training, and the accumulated displacement and the rotation angle of six joints in the three directions were used as input features. The bi-directional long short-term memory (BiLSTM) model was used to identify seven common operation postures: standing, slightly bending, deep bending, half-squatting, squatting, sitting, and supine, with an average accuracy of 98.24%. According to the experiment result, the proposed method could be used to develop a low-cost and effective solution to human posture recognition for factory operation.


Assuntos
Captura de Movimento , Postura , Humanos , Fenômenos Biomecânicos , Movimento , Rotação , Movimento (Física)
3.
IEEE Trans Haptics ; PP2024 Jan 25.
Artigo em Inglês | MEDLINE | ID: mdl-38271168

RESUMO

It is currently unclear how sharpness discrimination ability is distributed across a wide range of edge sharpness and the effect of contact area on haptic perception. We 3D printed triangular prisms with various edge sharpness and half-edge widths in the full-scale range and conducted 2AFC tasks to gain the haptic threshold distribution. Results show that the distribution curves of the sharpness threshold and its contact area have a similar inflection point at 115°, implying a boundary between medium-low and high stimuli. It is also found that Weber fractions in the medium stimulus range follow Weber's Law and are consistent with previous studies but lower than the mean of Weber fractions in the high stimulus range. Besides, there is no significant difference in upper and lower thresholds in the medium-low stimulus range but a significant difference in the high stimulus range with the higher upper threshold. Variations in contact area do not affect sharpness discrimination ability when the half-edge width exceeds 2 mm. However, decreasing the half-edge width from 2 mm to 1 mm significantly reduces haptic sensitivity. Our findings offer preliminary evidence contributing to understanding haptic perception in edge sharpness discrimination, encompassing the properties of objects and object-individual interfaces.

4.
BMC Plant Biol ; 24(1): 9, 2024 Jan 02.
Artigo em Inglês | MEDLINE | ID: mdl-38163908

RESUMO

BACKGROUND: Essential micronutrient Boron (B) plays crucial roles in plant survival and reproduction but becomes toxic in higher quantities. Although plant cells have different B transport systems, B homeostasis is mainly maintained by two transporter protein families: B exporters (BOR) and nodulin-26-like intrinsic proteins (NIP). Their diversity and differential expression are responsible for varied B tolerance among plant varieties and species. Longan is a highly admired subtropical fruit with a rising market in China and beyond. In the present study, we cultured Shixia (SX) and Yiduo (YD), two differently characterized Longan cultivars, with foliar B spray. We analyzed their leaf physiology, fruit setting, B content, and boron transporter gene expression of various tissue samples. We also traced some of these genes' subcellular localization and overexpression effects. RESULTS: YD and SX foliage share similar microstructures, except the mesophyll cell wall thickness is double in YD. The B spray differently influenced their cellular constituents and growth regulators. Gene expression analysis showed reduced BOR genes expression and NIP genes differential spatiotemporal expression. Using green fluorescent protein, two high-expressing NIPs, NIP1 and NIP19, were found to translocate in the transformed tobacco leaves' cell membrane. NIPs transformation of SX pollen was confirmed using magnetic beads and quantified using a fluorescence microscope and polymerase chain reaction. An increased seed-setting rate was observed when YD was pollinated using these pollens. Between the DlNIP1 and DlNIP19 transformed SX pollen, the former germinated better with increasing B concentrations and, compared to naturally pollinated plants, had a better seed-setting rate in YD♀ × SX♂. CONCLUSION: SX and YD Longan have different cell wall structures and react differently to foliar B spray, indicating distinct B tolerance and management. Two B transporter NIP genes were traced to localize in the plasma membrane. However, under high B concentrations, their differential expression resulted in differences in Jasmonic acid content, leading to differences in germination rate. Pollination of YD using these NIPs transformed SX pollen also showed NIP1 overexpression might overcome the unilateral cross incompatibility between YD♀ × SX♂ and can be used to increase Longan production.


Assuntos
Boro , Proteínas de Membrana Transportadoras , Boro/metabolismo , Transporte Biológico , Proteínas de Membrana Transportadoras/genética , Plantas/metabolismo , Proteínas de Transporte/metabolismo , Homeostase
5.
Zhongguo Zhong Yao Za Zhi ; 48(18): 5049-5055, 2023 Sep.
Artigo em Chinês | MEDLINE | ID: mdl-37802847

RESUMO

This study aimed to explore the effect and mechanism of acetylalkannin from Arnebia euchroma on the proliferation, migration, and invasion of human melanoma A375 cells. A375 cells were divided into a blank group, and low-, medium-, and high-dose acetylalkannin groups(0.5, 1.0, and 2.0 µmol·L~(-1)). The MTT assay was used to detect cell proliferation. Cell scratch and transwell migration assays were used to detect cell migration ability, and the transwell invasion assay was used to detect cell invasion ability. Western blot was used to detect the protein expression of migration and invasion-related N-cadherin, vimentin, matrix metalloproteina-se-9(MMP-9), and Wnt/ß-catenin pathway-related Wnt1, Axin2, glycogen synthase kinase-3ß(GSK-3ß), phosphorylated GSK-3ß(p-GSK-3ß), ß-catenin, cell cycle protein D_1(cyclin D_1), and p21. Real-time fluorescence-based quantitative polymerase chain reaction(real-time PCR) was used to detect the mRNA expression of E-cadherin, matrix metalloproteinase-2(MMP-2), N-cadherin, vimentin, ß-catenin, snail-1, and CD44. MTT results showed that the cell inhibition rates in the acetylalkannin groups significantly increased as compared with that in the blank group(P<0.01). The results of cell scratch and transwell assays showed that compared with the blank group, the acetylalkannin groups showed reduced cell migration and invasion, and migration and invasion rates(P<0.05, P<0.01) and weakened horizontal and vertical migration and invasion abilities. Western blot results showed that compared with the blank group, the high-dose acetylalkannin group showed increased expression of Axin2 protein(P<0.05), and decreased expression of N-cadherin, vimentin, MMP-9, Wnt1, p-GSK-3ß, ß-catenin, cyclin D_1, and p21 proteins(P<0.05, P<0.01). The expression of GSK-3ß protein did not change significantly. PCR results showed that the overall trend of MMP-2, N-cadherin, vimentin, ß-catenin, snail-1, and CD44 mRNA expression was down-regulated(P<0.01), and the expression of E-cadherin mRNA increased(P<0.01). Acetylalkannin can inhibit the proliferation, migration, and invasion of human melanoma A375 cells, and its mechanism of action may be related to the regulation of Wnt/ß-catenin signaling pathway.


Assuntos
Boraginaceae , Melanoma , Humanos , Metaloproteinase 2 da Matriz/metabolismo , Glicogênio Sintase Quinase 3 beta/metabolismo , beta Catenina/genética , beta Catenina/metabolismo , Vimentina/genética , Vimentina/metabolismo , Metaloproteinase 9 da Matriz/metabolismo , Linhagem Celular Tumoral , Via de Sinalização Wnt , Caderinas/genética , Melanoma/tratamento farmacológico , Melanoma/genética , Ciclina D/metabolismo , Proliferação de Células , Boraginaceae/genética , RNA Mensageiro , Movimento Celular
6.
Commun Biol ; 6(1): 1072, 2023 10 21.
Artigo em Inglês | MEDLINE | ID: mdl-37865654

RESUMO

Common ragweed is an invasive alien species causing severe allergies in urban residents. Understanding its urban invasion pathways is crucial for effective control. However, knowledge is limited, with most studies focusing on agricultural and natural areas, and occurrence record-based studies exhibiting uncertainties. We address this gap through a study in East China cities, combining population genetics and occurrence records. Leaf samples from 37 urban common ragweed populations across 15 cities are collected. Genomic and chloroplast DNA extraction facilitate analysis of spatial genetic patterns and gene flows. Additionally, international grain trade data is examined to trace invasion sources. Results indicate spatial genetic patterns impacted by multiple introductions over time. We infer the modern grain trade between the United States and China as the primary invasion pathway. Also, cities act as transportation hubs and ports of grain importation might disperse common ragweed to urban areas. Invasive species control should account for cities as potential landing and spread hubs of common ragweed.


Assuntos
Ambrosia , Genética Populacional , Estados Unidos , Cidades , Ambrosia/genética , Espécies Introduzidas , Agricultura
7.
BMC Plant Biol ; 23(1): 448, 2023 Sep 23.
Artigo em Inglês | MEDLINE | ID: mdl-37741992

RESUMO

R2R3-MYB is an important transcription factor family that regulates plant growth and development. Root development directly affects the absorption of water and nutrients by plants. Therefore, to understand the regulatory role of R2R3-MYB transcription factor family in root development of longan, this study identified the R2R3-MYB gene family members at the genome-wide level, and analyzed their phylogenetic characteristics, physical and chemical properties, gene structure, chromosome location and tissue expression. The analysis identified 124 R2R3-MYB family members in the longan genome. Phylogenetic analysis divided these members into 22 subfamilies, and the members of the unified subfamily had similar motifs and gene structures. The result of qRT-PCR showed that expression levels of DlMYB33, DlMYB34, DlMYB59, and DlMYB77 were significantly higher in main roots than in lateral as opposed to those of DlMYB35, DlMYB69, DlMYB70, and DlMYB83, which were significantly lower. SapBase database prediction and miRNAs sequencing results showed that 34 longan miRNAs could cleave R2R3-MYB, including 17 novel miRNAs unique to longan. The qRT-PCR and subcellular localization experiments of DlMYB92 and DlMYB98 showed that DlMYB92 is a key factor that regulates transcription in the nucleus and participates in the regulation of longan lateral root development. Longan also has a conserved miRNA-MYB-lateral root development regulation mechanism. This study provides a reference for further research on the transcriptional regulation of the miRNA-R2R3-MYB module in the root development of longan.


Assuntos
Genes myb , MicroRNAs , Filogenia , MicroRNAs/genética , Fatores de Transcrição/genética
8.
Front Aging Neurosci ; 15: 1187167, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37547744

RESUMO

Introduction: Although the subthalamic nucleus (STN) has proven to be a safe and effective target for deep brain stimulation (DBS) in the treatment of primary dystonia, the rates of individual improvement vary considerably. On the premise of selecting appropriate patients, the location of the stimulation contacts in the dorsolateral sensorimotor area of the STN may be an important factor affecting therapeutic effects, but the optimal location remains unclear. This study aimed to define an optimal location using the medial subthalamic nucleus border as an anatomical reference and to explore the influence of the location of active contacts on outcomes and programming strategies in a series of patients with primary dystonia. Methods: Data from 18 patients who underwent bilateral STN-DBS were retrospectively acquired and analyzed. Patients were assessed preoperatively and postoperatively (1 month, 3 months, 6 months, 1 year, 2 years, and last follow-up after neurostimulator initiation) using the Toronto Western Spasmodic Torticollis Rating Scale (for cervical dystonia) and the Burke-Fahn-Marsden Dystonia Rating Scale (for other types). Optimal parameters and active contact locations were determined during clinical follow-up. The position of the active contacts relative to the medial STN border was determined using postoperative stereotactic MRI. Results: The clinical improvement showed a significant negative correlation with the y-axis position (anterior-posterior; A+, P-). The more posterior the electrode contacts were positioned in the dorsolateral sensorimotor area of the STN, the better the therapeutic effects. Cluster analysis of the improvement rates delineated optimal and sub-optimal groups. The optimal contact coordinates from the optimal group were 2.56 mm lateral, 0.15 mm anterior, and 1.34 mm superior relative to the medial STN border. Conclusion: STN-DBS was effective for primary dystonia, but outcomes were dependent on the active contact location. Bilateral stimulation contacts located behind or adjacent to Bejjani's line were most likely to produce ideal therapeutic effects. These findings may help guide STN-DBS preoperative planning, stimulation programming, and prognosis for optimal therapeutic efficacy in primary dystonia.

9.
Zhongguo Zhong Yao Za Zhi ; 48(13): 3409-3420, 2023 Jul.
Artigo em Chinês | MEDLINE | ID: mdl-37474979

RESUMO

Cardiovascular diseases(CVD) with high morbidity and mortality pose severe threats to human life. Allicin, a main active ingredient of garlic, possesses multiple pharmaceutical activities. It not only exerts cardioprotective effects but also prevents the risk factors for CVD. Allicin exerts cardioprotective effects via a variety of mechanisms, including inhibiting oxidative stress, apoptosis, autophagy, and inflammatory responses, regulating lipid metabolism and gut microbiota, inducing hydrogen sulfide production, and dilating vessels. Despite the valuable cardioprotective effects, the instability of allicin has hindered the basic research and clinical application. This paper reviews the progress in the cardioprotective effects and mechanisms of allicin in the last decade and summarizes the methods to improve the stability of allicin. In addition, this review provides a reference for further research and development of allicin in cardiovascular protection.


Assuntos
Doenças Cardiovasculares , Dissulfetos , Humanos , Coração , Ácidos Sulfínicos/farmacologia , Doenças Cardiovasculares/tratamento farmacológico , Doenças Cardiovasculares/prevenção & controle , Preparações Farmacêuticas
10.
J Asian Nat Prod Res ; : 1-15, 2023 Jun 13.
Artigo em Inglês | MEDLINE | ID: mdl-37310856

RESUMO

ß-acetoxyisovalerylalkannin (ß-AIVA) is one of shikonin/alkannin derivative, which were mainly extracted from Boraginaceae family. The effects of ß-AIVA on human melanoma A375 cells and U918 cells were investigated in vitro. The CCK-8 assay showed that ß-AIVA inhibited proliferation of cells. Results from flow cytometry, ROS assay and JC-1 assay showed that ß-AIVA increased late apoptosis rate, induced the production of ROS and promoted mitochondrial depolarization in cells. ß-AIVA regulated expressions of BAX and Bcl-2 proteins, and increased the expression of cleaved caspase-9 and cleaved caspase-3. These findings suggest that ß-AIVA may be a potential therapeutic drug for treating melanoma.

11.
Zhongguo Zhong Yao Za Zhi ; 48(3): 778-788, 2023 Feb.
Artigo em Chinês | MEDLINE | ID: mdl-36872242

RESUMO

This study aimed to explore the potential mechanism of Berberis atrocarpa Schneid. anthocyanin against Alzheimer's disease(AD) based on network pharmacology, molecular docking technology, and in vitro experiments. Databases were used to screen out the potential targets of the active components of B. atrocarpa and the targets related to AD. STRING database and Cytoscape 3.9.0 were adopted to construct a protein-protein interaction(PPI) network and carry out topological analysis of the common targets. Gene Ontology(GO) and Kyoto Encyclopedia of Genes and Genomes(KEGG) enrichment analyses were performed on the target using the DAVID 6.8 database. Molecular docking was conducted to the active components and targets related to the nuclear factor kappa B(NF-κB)/Toll-like receptor 4(TLR4) pathway. Finally, lipopolysaccharide(LPS) was used to induce BV2 cells to establish the model of AD neuroinflammation for in vitro experimental validation. In this study, 426 potential targets of active components of B. atrocarpa and 329 drug-disease common targets were obtained, and 14 key targets were screened out by PPI network. A total of 623 items and 112 items were obtained by GO functional enrichment analysis and KEGG pathway enrichment analysis, respectively. Molecular docking results showed that NF-κB, NF-κB inhibitor(IκB), TLR4, and myeloid differentiation primary response 88(MyD88) had good binding abilities to the active components, and malvidin-3-O-glucoside had the strongest binding ability. Compared with the model group, the concentration of nitric oxide(NO) decreased at different doses of malvidin-3-O-glucoside without affecting the cell survival rate. Meanwhile, malvidin-3-O-glucoside down-regulated the protein expressions of NF-κB, IκB, TLR4, and MyD88. This study uses network pharmacology and experimental verification to preliminarily reveal that B. atrocarpa anthocyanin can inhibit LPS-induced neuroinflammation by regulating the NF-κB/TLR4 signaling pathway, thereby achieving the effect against AD, which provides a theoretical basis for the study of its pharmacodynamic material basis and mechanism.


Assuntos
Doença de Alzheimer , Berberis , NF-kappa B , Farmacologia em Rede , Antocianinas , Lipopolissacarídeos , Simulação de Acoplamento Molecular , Fator 88 de Diferenciação Mieloide , Doenças Neuroinflamatórias , Receptor 4 Toll-Like , Proteínas I-kappa B
12.
Front Plant Sci ; 14: 1110005, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36818860

RESUMO

Longan (Dimocarpus Longan) is one of the most important fruit crops in Southern China. Lack of available Mg in acidic soil conditions is a limitation to further increasing longan yield. Magnesium transporter (MGT/MRS2) mediates the uptake, transport, and redistribution of Mg2+ in higher plants. To understand the role of MGTs family members in longan Mg deficiency. We identified and analyzed the protein characteristics, phylogeny, expression changes, subcellular localization, and transcriptional regulation of DlMGTs members. The results showed that, twelve DlMGTs are localized in the cell membrane, chloroplast, and nucleus. The evolutionary differences in MGTs between herbaceous and woody species in different plants. The DlMGTs promoters contained many cis-acting elements and transcription factor binding sites related to the hormone, environmental, and stress response. Subcellular localization assays showed that DlMGT1 localizes in the cell membrane of Arabidopsis protoplasts. The candidate transcription factor DlGATA16, which may regulate the expression of DlMGT1, was localized in the nucleus of tobacco leaves. Dual luciferase analysis demonstrated that DlGATA16 is a potential factor regulating the transcriptional activity of DlMGT1. In this study, we identified and analyzed DlMGTs on a genome-wide scale and the subcellular localization and interaction of DlMGT1 and DlGATA16, which has important implications for further functional analysis studies of MGTs and the use of MGT for longan genetic improvement.

13.
Biomater Sci ; 11(2): 630-640, 2023 Jan 17.
Artigo em Inglês | MEDLINE | ID: mdl-36484349

RESUMO

Effective treatment of bacterial biofilm-related infections is a great challenge for the medical community. During the formation of biofilms, bacteria excrete extracellular polymeric substances (EPS), including polysaccharides, proteins, nucleic acids, etc., to encapsulate themselves and form a "fort-like" structure, which greatly reduces the efficiency of therapeutic agents. Herein, we prepared a nanoagent (MnO2-amylase-PEG-ICG nanosheets, MAPI NSs) with biofilm degradation capability for efficient photothermal therapy and fluorescence imaging of methicillin-resistant Staphylococcus aureus (MRSA) biofilm infections. MAPI NSs were constructed by sequentially modifying α-amylase, polyethylene glycol (PEG), and indocyanine green (ICG) on manganese dioxide nanosheets (MnO2 NSs). Experimental results exhibited that MAPI NSs could accumulate in infected tissues after intravenous injection, degrade in the acidic biofilm microenvironment, and release the loaded ICG for near-infrared (NIR) fluorescence imaging of the infected tissues. Importantly, MAPI NSs could efficiently eliminate MRSA biofilm infections in mice by α-amylase enhanced photothermal therapy. In addition, MAPI NSs exhibited neglectable toxicity towards mice. Given the superior properties of MAPI NSs, the enzyme-degradation enhanced therapeutic strategy presented in this work offers a promising solution for effectively combating biofilm infectious diseases.


Assuntos
Infecções Bacterianas , Staphylococcus aureus Resistente à Meticilina , Camundongos , Animais , Terapia Fototérmica , Compostos de Manganês , Amilases , Óxidos , Polietilenoglicóis/química , Verde de Indocianina/química , Biofilmes , alfa-Amilases , Imagem Óptica , Antibacterianos/farmacologia , Antibacterianos/química
14.
Br J Pharmacol ; 180(5): 628-646, 2023 03.
Artigo em Inglês | MEDLINE | ID: mdl-36355777

RESUMO

BACKGROUND AND PURPOSE: Psoriasis is an inflammatory skin disease of chronic recurrence mediated by the interaction between IL-17 and keratinocytes, which sustains a vicious circle of inflammation. Safe and effective natural medicine is a potential strategy for the clinical treatment of psoriasis. Given its prominent anti-proliferative and anti-inflammatory properties, we investigated the actions of allicin in improving psoriasis. EXPERIMENTAL APPROACH: Pharmacodynamic studies were carried out in mice after topical administration of allicin against psoriasis-like lesions induced by imiquimod. Skin sensitization tests were evaluated on guinea pigs. Toxicological studies and skin irritation tests were assessed by consecutive topical allicin alone on the skin of rabbits. RNA-seq probed transcriptomic changes following allicin. Western blot explored the actions of allicin on the interaction between IL-17A and keratinocytes. Changes in inflammatory factor expression were analysed by qPCR and immunohistochemistry. KEY RESULTS: Allicin significantly improved the epidermal structure by inhibiting the excessive proliferation and reduced apoptosis of keratinocytes. Furthermore, allicin reduced the secretion of inflammatory cytokines (IL-17A/F, IL-22, IL-12, and IL-20), chemokines (CXCL2, CXCL5, and CCL20), and anti-bacterial peptides (S100a8/9). Mechanistically, allicin directly inhibited the IL-17-induced TRAF6/MAPK/NF-κB and STAT3/NF-κB signalling cascades in keratinocytes, thus breaking the positive inflammatory feedback and alleviating imiquimod-induced psoriasis-like dermatitis in mice. Importantly, topical administration of allicin did not cause skin allergy, and the safety and adaptability of long-term application were verified. CONCLUSIONS AND IMPLICATIONS: Interfering with IL-17 signalling in keratinocytes with allicin is a promising strategy for treating psoriasis, given its safety and effectiveness.


Assuntos
Dermatite , Psoríase , Animais , Coelhos , Camundongos , Cobaias , Imiquimode/efeitos adversos , Interleucina-17 , NF-kappa B/metabolismo , Psoríase/induzido quimicamente , Psoríase/tratamento farmacológico , Psoríase/patologia , Queratinócitos , Dermatite/metabolismo , Pele/metabolismo , Inflamação/induzido quimicamente , Inflamação/tratamento farmacológico , Inflamação/patologia , Camundongos Endogâmicos BALB C , Modelos Animais de Doenças
15.
Materials (Basel) ; 17(1)2023 Dec 23.
Artigo em Inglês | MEDLINE | ID: mdl-38203941

RESUMO

Noble metal-free electrocatalysts have received widespread attention in a hydrogen evolution reaction (HER) due to the importance of renewable energy development. Herein, a Co2P/CoP heterojunction embedded on an N-doped carbon (Co2P/CoP/NC) electrocatalyst was prepared via an in situ pyrolysis method. The as-prepared electrocatalyst exhibited efficient electrocatalytic activity for HER in an acidic solution. The Co2P/CoP/NC catalyst displayed an overpotential of 184 mV at 10 mA cm-2 and a low Tafel slope of 82 mV dec-1, which could be attributed to the tight Co2P/CoP heterojunction and the synergetic effect of Co2P/CoP and N-doped carbon. In addition, the electrochemical active surface area of Co2P/CoP/NC was 75.2 m2 g-1, which indicated that more active regions can be applied for the HER process. This report may pave a new way for the design of efficient and low-cost N-doped-carbon-supported 3d transition metal phosphide electrocatalysts.

16.
Opt Express ; 30(25): 45471-45487, 2022 Dec 05.
Artigo em Inglês | MEDLINE | ID: mdl-36522952

RESUMO

We find that the relative error of a fiber optic current sensor (FOCS) increases quadratically with the electric current to be measured, causing unacceptable inaccuracy for direct current (DC) measurements beyond 100 kA. We prove analytically and confirm experimentally that such a nonlinear relative error escalation (REE) mainly originates from the residual linear birefringence of the spun fiber used in the FOCS. We propose and demonstrate that by first measuring residual linear birefringence, together with the circular birefringence of the spun fiber, the REE of the FOCS can be significantly reduced from -1.22% to -0.15% at 200 kA DC by a compensation scheme using the measured birefringences in the quadratic expression we derived. Further reduction of the REE to -0.02% at 200 kA DC can be obtained if the quadratic relation between the REE and the current under test is experimentally obtained. Our work points to a new direction for drastically improving the accuracy of FOCS at large currents and shall prove beneficial for scientists and engineers working in the field of current sensing.

17.
Pharmaceuticals (Basel) ; 15(11)2022 Oct 27.
Artigo em Inglês | MEDLINE | ID: mdl-36355499

RESUMO

Chlorogenic acid (CGA) is a phenylpropyl substance synthesized through the shikimic acid pathway. In addition to its anti-tumor, anti-inflammatory, and antioxidant abilities, CGA also has immunomodulatory effects. The aim of the present study is to investigate the therapeutic effects of CGA on the skin damage and arthritis caused by systemic lupus erythematosus (SLE) in an MRL/lpr mouse model. In the SLE model, female MRL/lpr mice at the age of 10 weeks old were treated with CGA daily or cyclophosphamide (CTX) weekly via intraperitoneal injection for three months. After treatment, CGA can significantly alleviate the skin and mucous membrane damage caused by SLE and has a certain improvement effect on arthritis. CGA could inhibit dsDNA expression to a certain extent but has no obvious regulation on ANA concentration. The ELISA and BioMAP results indicated that CGA might play an anti-inflammatory role by down-regulating the interleukin (IL)-17 level. In conclusion, our study demonstrates that CGA can alleviate multiorgan damage in MRL/lpr mice by reducing IL-17.

18.
Plant Biotechnol (Tokyo) ; 39(3): 259-272, 2022 Sep 25.
Artigo em Inglês | MEDLINE | ID: mdl-36349234

RESUMO

Potassium chlorate can promote off-season flowering in longan, but the molecular mechanisms are poorly understood. In this study, four-year-old 'Shixia' longan trees were injected in the trunk with potassium chlorate, and terminal buds were sampled and analyzed using transcriptomics and bioinformatics tools. To generate a reference longan transcriptome, we obtained 207,734 paired-end reads covering a total of 58,514,149 bp, which we assembled into 114,445 unigenes. Using this resource, we identified 3,265 differentially expressed genes (DEGs) that were regulated in longan terminal buds in response to potassium chlorate treatment for 2, 6 or 30 days, including 179 transcription factor genes. By reference to the Arabidopsis literature, we then defined 38 longan genes involved in flowering, from which we constructed the longan flowering pathway. According to RNA-seq data, at least 24 of these genes, which participate in multiple signaling pathways, are involved in potassium chlorate-stimulated floral induction, and the differential regulation in terminal buds of ten floral pathway genes (GI, CO, GID1, GA4, GA5, FLC, AP1, LFY, FT and SOC1) was confirmed by qRT-PCR. These data will contribute to an improved understanding of the functions of key genes involved in longan floral induction by potassium chlorate.

19.
Sci Rep ; 12(1): 7678, 2022 05 10.
Artigo em Inglês | MEDLINE | ID: mdl-35538160

RESUMO

Subthalamic nucleus (STN) deep brain stimulation (DBS) has been proven to be an alternative target choice for refractory isolated cervical dystonia (CD). However, assessments of its short and long-term safety, efficacy, and sustained effectiveness have been limited to few reports. Here, we evaluated nine consecutive refractory isolated CD patients who underwent bilateral STN DBS and accepted to short and long-term follow-up in this retrospective study. Seven time points were used to see the Toronto Western Spasmodic Torticollis Rating Scale (TWSTRS) scores (pre-operation [baseline], 1, 3, 6, 12, 24 months post-operation and last follow-up) to assess improvement of dystonic symptoms. The 36-item Short-Form General Health Survey (SF-36) scores obtained at pre-operation and last follow-up to assess the changes in quality of life. All patients tolerated surgery well and acquired observable clinical benefits from STN DBS therapy. All patients achieved a considerable improvement in quality of life at the last follow-up. The hardware-related adverse events can be tolerated and the stimulation-related adverse events can be ameliorated by programming. Our data support the idea that bilateral STN DBS is a safety and effective method for the treatment of refractory isolated CD, with persistent and remarkable improvement in both movement and quality of life.


Assuntos
Estimulação Encefálica Profunda , Distúrbios Distônicos , Núcleo Subtalâmico , Torcicolo , Estimulação Encefálica Profunda/métodos , Globo Pálido/cirurgia , Humanos , Qualidade de Vida , Estudos Retrospectivos , Núcleo Subtalâmico/fisiologia , Torcicolo/terapia , Resultado do Tratamento
20.
PLoS One ; 17(4): e0262622, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35390002

RESUMO

OBJECTIVE: This study assessed the major nutrients and antioxidant properties of Berberis heteropoda Schrenk fruits collected from the Nanshan Mountain area of Urumqi City, Xinjiang Uygur Autonomous Region, China. METHODS AND MATERIALS: We assessed the basic nutrients, including amino acids, minerals, and fatty acids, and determined the total phenol, flavonoid, and anthocyanin contents of the extracts. RESULTS: The analytical results revealed the average water (75.22 g/100 g), total fat (0.506 g/100 g), total protein (2.55 g/100 g), ash (1.31 g/100 g), and carbohydrate (17.72 g/100 g) contents in fresh B. heteropoda fruit, with total phenol, flavonoid, and anthocyanin contents of B. heteropoda fruits at 68.55 mg gallic acid equivalents/g, 108.42 mg quercetin equivalents/g, and 19.83 mg cyanidin-3-glucoside equivalent/g, respectively. Additionally, UPLC-Q-TOF-MSE analysis of polyphenols in B. heteropoda fruit revealed 32 compounds. CONCLUSION: B. heteropoda fruits may have potential nutraceutical value and represent a potential source of nutrition and antioxidant phytochemicals in the human diet.


Assuntos
Berberis , Antocianinas/análise , Antioxidantes/química , Flavonoides/análise , Frutas/química , Humanos , Fenol , Extratos Vegetais/química
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