Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 171
Filtrar
Mais filtros

Base de dados
País/Região como assunto
Tipo de documento
Intervalo de ano de publicação
1.
PLoS Pathog ; 20(3): e1012082, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38470932

RESUMO

Ferroptosis, a defensive strategy commonly employed by the host cells to restrict pathogenic infections, has been implicated in the development and therapeutic responses of various types of cancer. However, the role of ferroptosis in oncogenic Kaposi's sarcoma-associated herpesvirus (KSHV)-induced cancers remains elusive. While a growing number of non-histone proteins have been identified as acetylation targets, the functions of these modifications have yet to be revealed. Here, we show KSHV reprogramming of host acetylation proteomics following cellular transformation of rat primary mesenchymal precursor. Among them, SERPINE1 mRNA binding protein 1 (SERBP1) deacetylation is increased and required for KSHV-induced cellular transformation. Mechanistically, KSHV-encoded viral interleukin-6 (vIL-6) promotes SIRT3 deacetylation of SERBP1, preventing its binding to and protection of lipoyltransferase 2 (Lipt2) mRNA from mRNA degradation resulting in ferroptosis. Consequently, a SIRT3-specific inhibitor, 3-TYP, suppresses KSHV-induced cellular transformation by inducing ferroptosis. Our findings unveil novel roles of vIL-6 and SERBP1 deacetylation in regulating ferroptosis and KSHV-induced cellular transformation, and establish the vIL-6-SIRT3-SERBP1-ferroptosis pathways as a potential new therapeutic target for KSHV-associated cancers.


Assuntos
Ferroptose , Herpesvirus Humano 8 , Neoplasias , Sarcoma de Kaposi , Sirtuína 3 , Ratos , Animais , Herpesvirus Humano 8/genética , Sirtuína 3/genética , Sirtuína 3/metabolismo , Transformação Celular Neoplásica , Proteínas Virais/metabolismo , RNA Mensageiro/genética , RNA Mensageiro/metabolismo
2.
Lancet ; 403(10435): 1460-1471, 2024 Apr 13.
Artigo em Inglês | MEDLINE | ID: mdl-38554725

RESUMO

BACKGROUND: Afamitresgene autoleucel (afami-cel) showed acceptable safety and promising efficacy in a phase 1 trial (NCT03132922). The aim of this study was to further evaluate the efficacy of afami-cel for the treatment of patients with HLA-A*02 and MAGE-A4-expressing advanced synovial sarcoma or myxoid round cell liposarcoma. METHODS: SPEARHEAD-1 was an open-label, non-randomised, phase 2 trial done across 23 sites in Canada, the USA, and Europe. The trial included three cohorts, of which the main investigational cohort (cohort 1) is reported here. Cohort 1 included patients with HLA-A*02, aged 16-75 years, with metastatic or unresectable synovial sarcoma or myxoid round cell liposarcoma (confirmed by cytogenetics) expressing MAGE-A4, and who had received at least one previous line of anthracycline-containing or ifosfamide-containing chemotherapy. Patients received a single intravenous dose of afami-cel (transduced dose range 1·0 × 109-10·0 × 109 T cells) after lymphodepletion. The primary endpoint was overall response rate in cohort 1, assessed by a masked independent review committee using Response Evaluation Criteria in Solid Tumours (version 1.1) in the modified intention-to-treat population (all patients who received afami-cel). Adverse events, including those of special interest (cytokine release syndrome, prolonged cytopenia, and neurotoxicity), were monitored and are reported for the modified intention-to-treat population. This trial is registered at ClinicalTrials.gov, NCT04044768; recruitment is closed and follow-up is ongoing for cohorts 1 and 2, and recruitment is open for cohort 3. FINDINGS: Between Dec 17, 2019, and July 27, 2021, 52 patients with cytogenetically confirmed synovial sarcoma (n=44) and myxoid round cell liposarcoma (n=8) were enrolled and received afami-cel in cohort 1. Patients were heavily pre-treated (median three [IQR two to four] previous lines of systemic therapy). Median follow-up time was 32·6 months (IQR 29·4-36·1). Overall response rate was 37% (19 of 52; 95% CI 24-51) overall, 39% (17 of 44; 24-55) for patients with synovial sarcoma, and 25% (two of eight; 3-65) for patients with myxoid round cell liposarcoma. Cytokine release syndrome occurred in 37 (71%) of 52 of patients (one grade 3 event). Cytopenias were the most common grade 3 or worse adverse events (lymphopenia in 50 [96%], neutropenia 44 [85%], leukopenia 42 [81%] of 52 patients). No treatment-related deaths occurred. INTERPRETATION: Afami-cel treatment resulted in durable responses in heavily pre-treated patients with HLA-A*02 and MAGE-A4-expressing synovial sarcoma. This study shows that T-cell receptor therapy can be used to effectively target solid tumours and provides rationale to expand this approach to other solid malignancies. FUNDING: Adaptimmune.


Assuntos
Anemia , Lipossarcoma Mixoide , Sarcoma Sinovial , Trombocitopenia , Adulto , Humanos , Sarcoma Sinovial/tratamento farmacológico , Sarcoma Sinovial/genética , Lipossarcoma Mixoide/etiologia , Síndrome da Liberação de Citocina/etiologia , Ifosfamida , Trombocitopenia/etiologia , Anemia/etiologia , Antígenos HLA-A , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico
3.
Rheumatology (Oxford) ; 63(3): 856-865, 2024 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-37467058

RESUMO

OBJECTIVE: Accumulating evidence from microbial studies have highlighted the modulatory roles of intestinal microbes in numerous human diseases, however, the shared microbial signatures across different diseases remain relatively unclear. METHODS: To consolidate existing knowledge across multiple studies, we performed meta-analyses of 17 disease types, covering 34 case-control datasets of 16S rRNA sequencing data, to identify shared alterations among different diseases. Furthermore, the impact of a microbial species, Lactobacillus salivarius, was established in a dextran sodium sulphate-induced colitis model and a collagen type II-induced arthritis mouse model. RESULTS: Microbial alterations among autoimmune diseases were substantially more consistent compared with that of other diseases (cancer, metabolic disease and nervous system disease), with microbial signatures exhibiting notable discriminative power for disease prediction. Autoimmune diseases were characterized by the enrichment of Enterococcus, Veillonella, Streptococcus and Lactobacillus and the depletion of Ruminococcus, Gemmiger, Oscillibacter, Faecalibacterium, Lachnospiracea incertae sedis, Anaerostipes, Coprococcus, Alistipes, Roseburia, Bilophila, Barnesiella, Dorea, Ruminococcus2, Butyricicoccus, Phascolarctobacterium, Parabacteroides and Odoribacter, among others. Functional investigation of L. salivarius, whose genus was commonly enriched in numerous autoimmune diseases, demonstrated protective roles in two separate inflammatory mouse models. CONCLUSION: Our study highlights a strong link between autoimmune diseases and the gut microbiota, with notably consistent microbial alterations compared with that of other diseases, indicating that therapeutic strategies that target the gut microbiome may be transferable across different autoimmune diseases. Functional validation of L. salivarius highlighted that bacterial genera associated with disease may not always be antagonistic, but may represent protective or adaptive responses to disease.


Assuntos
Artrite Experimental , Doenças Autoimunes , Microbioma Gastrointestinal , Animais , Camundongos , Humanos , RNA Ribossômico 16S , Clostridiales , Modelos Animais de Doenças
4.
Eur J Pediatr ; 183(2): 581-590, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-37851084

RESUMO

This study aims to assess the role of methotrexate-related gene polymorphisms in children with acute lymphoblastic leukemia (ALL) during high-dose methotrexate (HD-MTX) therapy and to explore their effects on serum metabolites before and after HD-MTX treatment. The MTHFR 677C>T, MTHFR 1298A>C, ABCB1 3435C>T, and GSTP1 313A>G genotypes of 189 children with ALL who received chemotherapy with the CCCG-ALL-2020 regimen from January 2020 to April 2023 were analyzed, and toxic effects were reported according to the Common Terminology Criteria for Adverse Events (CTCAE, version 5.0). Fasting peripheral blood serum samples were collected from 27 children before and after HD-MTX treatment, and plasma metabolites were analyzed by liquid chromatography-tandem mass spectrometry (LC-MS). The results of univariate and multivariate analyses showed that MTHFR 677C>T and ABCB1 3435 C>T gene polymorphisms were associated with the delayed MTX clearance (P < 0.05) and lower platelet count after treatment in children with MTHFR 677 mutation compared with wild-type ones (P < 0.05), and pure mutations in ABCB1 3435 were associated with higher serum creatinine levels (P < 0.05). No significant association was identified between MTHFR 677C>T, MTHFR 1298A>C, ABCB1 3435 C>T, and GSTP1 313A>G genes and hepatotoxicity or nephrotoxicity (P > 0.05). However, the serum metabolomic analysis indicated that the presence of the MTHFR 677C > T gene polymorphism could potentially contribute to delayed MTX clearance by influencing L-phenylalanine metabolism, leading to the occurrence of related toxic side effects. CONCLUSION: MTHFR 677C>T and ABCB1 3435 C>T predicted the risk of delayed MTX clearance during HD-MTX treatment in children with ALL. Serum L-phenylalanine levels were significantly elevated after HD-MTX treatment in children with the MTHFR 677C>T mutation gene. TRIAL REGISTRATION: This study was registered at the Chinese Clinical Trial Registry (registration number: ChiCTR2000035264; registration: 2020/08/05; https://www.chictr.org.cn/ ). WHAT IS KNOWN: • MTX-related genes play an important role in MTX pharmacokinetics and toxicity, but results from different studies are inconsistent and the mechanisms involved are not clear. WHAT IS NEW: • Characteristics, prognosis, polymorphisms of MTX-related genes, and metabolite changes were comprehensively evaluated in children treated with HD-MTX chemotherapy. • Analysis revealed that both heterozygous and pure mutations in MTHFR 677C>T resulted in a significantly increased risk of delayed MTX clearance, and that L-phenylalanine has the potential to serve as a predictive marker for the metabolic effects of the MTHFR 677C>T polymorphism.


Assuntos
Metotrexato , Leucemia-Linfoma Linfoblástico de Células Precursoras , Criança , Humanos , Metotrexato/efeitos adversos , Polimorfismo Genético , Leucemia-Linfoma Linfoblástico de Células Precursoras/tratamento farmacológico , Leucemia-Linfoma Linfoblástico de Células Precursoras/genética , Genótipo , Metilenotetra-Hidrofolato Redutase (NADPH2)/genética , Fenilalanina , Polimorfismo de Nucleotídeo Único
5.
Health Commun ; : 1-11, 2024 May 29.
Artigo em Inglês | MEDLINE | ID: mdl-38812072

RESUMO

Women experiencing postpartum depression (PPD) often face the debilitating symptoms of depression as well as the stigmatization associated with having a mental health crisis during motherhood. Accordingly, there have been numerous calls for theoretical-based approaches to reduce the stigma and promote social support for women with PPD. Guided by stigma research, anthropomorphism literature, and attribution theory, this research explored the effect of PPD anthropomorphism (i.e., imbuing humanlike intentions and characteristics to PPD) on perceived controllability, sympathy, anger toward PPD, and willingness to provide social support (WPSS). Results of three studies revealed that humanizing PPD led to decreased perceived controllability attributed to women with PPD, resulting in increased sympathy, more anger toward PPD, and consequently, greater WPSS. This research contributes to the extant health communication literature, particularly in the realm of mental health stigma, by addressing how humanizing risk-bearing entities affects individuals' mental health related perceptions and decisions.

6.
Molecules ; 29(11)2024 May 27.
Artigo em Inglês | MEDLINE | ID: mdl-38893404

RESUMO

Supercritical CO2 has wide application in enhancing oil recovery, but the low viscosity of liquid CO2 can lead to issues such as poor proppant-carrying ability and high filtration loss. Therefore, the addition of thickening agents to CO2 is vital. Hydrocarbon polymers, as a class of green and sustainable materials, hold tremendous potential for acting as thickeners in supercritical CO2 systems, and PVAc is one of the best-performing hydrocarbon thickeners. To further improve the viscosity enhancement and solubility of PVAc, here we designed a novel polymer structure, PVAO, by introducing CO2-affine functional groups to PVAc. Molecular dynamics simulations were adopted to analyze viscosity and relevant solubility parameters systematically. We found that PVAO exhibits superior performance, with a viscosity enhancement of 1.5 times that of PVAc in supercritical CO2. While in the meantime, PVAO maintains better solubility characteristics than PVAc. Our findings offer insights for the future design of other high-performance polymers.

7.
Angew Chem Int Ed Engl ; 63(15): e202320027, 2024 Apr 08.
Artigo em Inglês | MEDLINE | ID: mdl-38317616

RESUMO

Ammonia (NH3) is pivotal in modern industry and represents a promising next-generation carbon-free energy carrier. Electrocatalytic nitrate reduction reaction (eNO3RR) presents viable solutions for NH3 production and removal of ambient nitrate pollutants. However, the development of eNO3RR is hindered by lacking the efficient electrocatalysts. To address this challenge, we synthesized a series of macrocyclic molecular catalysts for the heterogeneous eNO3RR. These materials possess different coordination environments around metal centers by surrounding subunits. Consequently, electronic structures of the active centers can be altered, enabling tunable activity towards eNO3RR. Our investigation reveals that metal center with an N2(pyrrole)-N2(pyridine) configuration demonstrates superior activity over the others and achieves a high NH3 Faradaic efficiency (FE) of over 90 % within the tested range, where the highest FE of approximately 94 % is obtained. Furthermore, it achieves a production rate of 11.28 mg mgcat -1 h-1, and a turnover frequency of up to 3.28 s-1. Further tests disclose that these molecular catalysts with diverse coordination environments showed different magnetic moments. Theoretical calculation results indicate that variated coordination environments can result in a d-band center variation which eventually affects rate-determining step energy and calculated magnetic moments, thus establishing a correlation between electronic structure, experimental activity, and computational parameters.

8.
Langmuir ; 39(48): 17392-17411, 2023 Dec 05.
Artigo em Inglês | MEDLINE | ID: mdl-37988628

RESUMO

Droplet boiling on the heating surface is a representative phenomenon in two-phase spray cooling under low volumetric fluxes. In particular, droplet boiling in the transition boiling regime holds the advantages of avoiding heat transfer deterioration in a film boiling regime and achieving comparable high heat transfer capacity in a nucleate boiling regime. While it is known to consist of intermittent liquid contact with the surface and surface dryout, quantifying the ensuing transient heat transfer performance and droplet behavior is very illusive. In this study, droplet boiling in the transition boiling regime on a micropillar array surface is investigated systematically, using the lattice Boltzmann model built up in the lab. The major contents discussed include the transient behaviors of the droplet, motion of the liquid bridge, and pinning/depinning of the three-phase contact line (TPCL), as well as the corresponding heat transfer performance. The evolution of a vapor film pierced by micropillars is analyzed from the views of morphological change and pressure distribution. The thickness of the vapor film is determined by the vapor generation rate dominated by the contact area and effective thermal conductivity, and the vapor escape rate by the permeability. The low permeability under a large pillar side length is responsible for the pressure buildup below the droplet, thus facilitating droplet rebound. The competition between capillary pressure and vapor film pressure dominates the trigger mode of the droplet rebound, i.e., fracture of the liquid bridge or filament and depinning of TPCL. The micropillar array surface is optimized to pursue the best cooling performance by assessing the impact from micropillar geometric dimensions on droplet contact time and area.

9.
Prenat Diagn ; 43(11): 1416-1424, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-37698492

RESUMO

BACKGROUND & AIM: Reproductive carrier screening seeks to identify couples at a high risk of having offspring affected by autosomal recessive and X-linked (XL) conditions. The aim of this paper is to provide a comprehensive overview of existing carrier screening panels by examining their gene content and characteristics, identifying the most common genes/conditions included in these panels, and analyzing their listed prices. METHODS: A comprehensive evaluation of existing carrier screening panels was conducted by searching for web-based content, reviewing information brochures, and establishing direct contact with the providers via email or phone. RESULTS: Twenty-two panels and their providers were identified with a cumulative total of 2205 unique genes. The number of genes included in these panels varied from 44 to 2054. Only 15 genes (0.7%) were included in all the panels. The carrier frequency of these 15 common genes and their associated conditions varied greatly, but the conditions associated with the genes are "severe". The price of these 22 panels ranged from $349 to $4320 per couple (USD in 2023). The correlation between the listed price and the number of selected genes among these panels was small and not statistically significant (r = 0.1023, p = 0.6959). CONCLUSION: Considerable discrepancies exist among carrier screening panels. Ongoing research and monitoring are necessary to capture the dynamic nature of the carrier screening landscape, providing up-to-date information for clinical practice and informed decision-making.

10.
Health Commun ; : 1-12, 2023 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-37260189

RESUMO

Drawing upon construal level theory and regulatory fit literature, this research examined the effect of fit between humor and regulatory focus on audience engagement with health information on social media. The results of two studies showed that incongruity humor (vs. aggressive humor) induced greater social proximity between the source and the viewer, and humor type interacted with regulatory focus of a message to impact audience engagement. Specifically, incongruity humor paired with a prevention-focused message (vs. a promotion-focused message) resulted in greater content endorsement and health information engagement, whereas aggressive humor combined with a promotion-focused message (vs. a prevention-focused message) led to greater content endorsement. Results further identified processing fluency as a mediator of the fit effect on audience engagement. This research offers important theoretical and practical implications for public health interventions on social media.

11.
Health Mark Q ; 40(3): 326-346, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-35946911

RESUMO

This study examined how humor (incongruity humor vs. no humor) interacts with individual differences in perceived efficacy to influence health attitudes and behavioral intentions. Results of a controlled experiment (N = 294) revealed that among individuals with lower levels of perceived efficacy, incongruity humor, relative to no humor condition, resulted in greater source liking, which in turn, enhanced their attitudes and intentions to perform preventive health behaviors. However, for individuals higher in perceived efficacy, incongruity humor (vs. no humor) had an indirect negative effect on intentions via decreased attitudes. Theoretical and practical implications of these findings are discussed.

12.
Small ; 18(38): e2203325, 2022 09.
Artigo em Inglês | MEDLINE | ID: mdl-35986691

RESUMO

Prostate cancer (PCa) with prostate-specific membrane antigen (PSMA)-specific high expression is well suited for molecularly targeted theranostics. PSMA expression correlates with the malignancy of PCa, and its dimeric form can promote tumor progression by exerting enzymatic activity to activate downstream signal transduction. However, almost no studies have shown that arresting the procancer signaling of the PSMA receptors themselves can cause tumor cell death. Meanwhile, supramolecular self-assembling peptides are widely used to design anticancer agents due to their unique and excellent properties. Here, a PSMA-targeting supramolecular self-assembling nanotheranostic agent, DBT-2FFGACUPA, which actively targets PSMA receptors on PCa cell membranes and induces them to enter the cell and form large aggregates, is developed. This process not only selectively images PSMA-positive tumor cells but also suppresses the downstream procancer signals of PSMA, causing tumor cell death. This work provides an alternative approach and an advanced agent for molecularly targeted theranostics options in PCa that can induce tumor cell death without relying on any reported anticancer drugs.


Assuntos
Medicina de Precisão , Neoplasias da Próstata , Humanos , Masculino , Polímeros , Neoplasias da Próstata/tratamento farmacológico , Transdução de Sinais
13.
Nucleic Acids Res ; 48(9): 4858-4876, 2020 05 21.
Artigo em Inglês | MEDLINE | ID: mdl-32313942

RESUMO

High-mobility group AT-hook 2 (HMGA2) is an architectural transcription factor that plays essential roles in embryonic development and cancer progression. However, the mechanism of HMGA2 regulation remains largely uncharacterized. Here, we demonstrate that HMGA2 can be modulated by hepatitis B X-interacting protein (HBXIP), an oncogenic transcriptional coactivator, in esophageal squamous cell carcinoma (ESCC). HMGA2 expression was positively associated with HBXIP expression in clinical ESCC tissues, and their high levels were associated with advanced tumor stage and reduced overall and disease-free survival. We found that oncogenic HBXIP could posttranslationally upregulate HMGA2 protein level in ESCC cells. HBXIP induced HMGA2 acetylation at the lysine 26 (K26), resulting in HMGA2 protein accumulation. In this process, HBXIP increased the acetyltransferase p300/CBP-associated factor (PCAF) phosphorylation and activation via the Akt pathway, then PCAF directly interacted with HMGA2, leading to HMGA2 acetylation in the cells. HMGA2 K26 acetylation enhanced its DNA binding capacity and blocked its ubiquitination and then inhibited proteasome-dependent degradation. Functionally, HBXIP-stabilized HMGA2 could promote ESCC cell growth in vitro and in vivo. Strikingly, aspirin suppressed ESCC growth by inhibiting HBXIP and HMGA2. Collectively, our findings disclose a new mechanism for the posttranslational regulation of HMGA2 mediated by HBXIP in ESCC.


Assuntos
Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Neoplasias Esofágicas/metabolismo , Carcinoma de Células Escamosas do Esôfago/metabolismo , Proteína HMGA2/metabolismo , Acetilação , Animais , Aspirina/farmacologia , Linhagem Celular Tumoral , DNA/metabolismo , Neoplasias Esofágicas/genética , Neoplasias Esofágicas/mortalidade , Neoplasias Esofágicas/patologia , Carcinoma de Células Escamosas do Esôfago/genética , Carcinoma de Células Escamosas do Esôfago/mortalidade , Carcinoma de Células Escamosas do Esôfago/patologia , Feminino , Regulação Neoplásica da Expressão Gênica , Proteína HMGA2/química , Humanos , Lisina/metabolismo , Camundongos Endogâmicos BALB C , Camundongos Nus , Prognóstico , Ligação Proteica , Estabilidade Proteica , Proteínas Proto-Oncogênicas c-akt/metabolismo , Transdução de Sinais , Ubiquitinação , Fatores de Transcrição de p300-CBP/metabolismo
14.
J Bus Res ; 148: 315-324, 2022 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-36540903

RESUMO

Given the challenges facing companies in communicating corporate social responsibility (CSR) initiatives amid the pandemic, this study focuses on the effects of CSR appeals in COVID-19 advertising. Using the Ordered Protection Motivation model and CSR literature as the foundation, this study examined the interaction effect between CSR appeal (altruistic CSR vs. strategic CSR) and threat intensity (low vs. high) of the crisis depiction featured in the ad on consumers' responses. Results revealed the moderating role of threat intensity on the relationships between CSR appeal and consumers' responses, such that altruistic CSR appeal outperformed strategic CSR appeal when consumers were exposed to an ad featuring a high-threat crisis depiction, whereas the two appeals yielded similar effects when the ad featured a low-threat crisis depiction. In particular, altruistic CSR appeal (vs. strategic CSR appeal) generated greater message credibility, stronger feelings of warmth, and lower CSR skepticism, resulting in more favorable ad and brand attitudes and stronger purchase intentions, but only in the high threat condition.

15.
Proteomics ; 21(20): e2100007, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-34482643

RESUMO

Methionine (Met) and cystine (CySS) are key sulfur donors in cell metabolism and are important nutrients for sustaining tumor growth; however, the molecular effects associated with their deprivation remain to be characterized. Here, we applied a xenograft mouse model to assess the impact of their deprivation on A549 xenografts and the xenograft-bearing animal. Results show that Met and CySS deprivation inhibits A549 growth in vitro, not in vivo. Deprivation was detrimental to the xenograft-bearing mouse, as demonstrated by weight loss and renal dysfunction. Differentially expressed proteins in A549 xenograft and mouse kidneys were characterized using quantitative proteomics. Functional annotation and protein-protein interaction network analysis revealed the enriched signaling pathways, including focal adhesion (Fn1) in the A549 xenograft, and xenobiotic metabolism (Cyp2e1) and glutathione metabolism (Ggt1) in the mouse kidney. Met and CySS deprivation inhibits the migratory and invasive properties of cancer cells, as evidenced by reduced expression of the epithelial to mesenchymal transition marker N-cadherin in A549 cells in vitro. Moreover, IGFBP1 protein expression was inhibited in both A549 xenograft and mouse kidneys. This study provides the first insights into changes within the proteome profile and biological processes upon Met and CySS deprivation in a A549 xenograft mouse model.


Assuntos
Cistina , Neoplasias Pulmonares , Animais , Transição Epitelial-Mesenquimal , Xenoenxertos , Metionina , Camundongos , Proteômica
16.
Langmuir ; 37(39): 11646-11656, 2021 Oct 05.
Artigo em Inglês | MEDLINE | ID: mdl-34569245

RESUMO

Droplet impinging on the boundary between hydrophilic and hydrophobic regions of a hybrid-wettability surface is studied both experimentally and numerically in the present paper. The interfacial evolution and dynamic feature and the corresponding underlying mechanisms behind are mainly analyzed. Because of the unbalanced surface energy in the vicinity of a boundary, the droplet undergoes spreading-receding in the hydrophobic region before migration toward the hydrophilic region. This results in an increase first but then a decrease in the spreading factor in the hydrophobic region, while it increases continuously in the hydrophilic region. In addition, increasing Weber number leads to the increase in both the spreading factor and migration displacement of the droplet in the hydrophobic region, but the latter decreases in the hydrophilic region, resulting from different momentums of secondary spreading. The experimental determinations are verified in detail by a series of numerical simulations performed based on the single variable method by fixing contact angles in different regions separately and excluding the impact momentum. It is shown that the highly unsymmetrical pressure field is exactly one important reason for droplet migration on the hybrid-wettability surface. Despite the weak dependence of the spreading factor on the hydrophilic contact angle in the hydrophobic region, it has an appreciably positive effect on droplet migration, which is confirmed by the increased pressure gradient with its action area in the hydrophobic region when decreasing the hydrophilic contact angle. This paper advances the fundamental understanding for droplet migration on the hybrid-/gradient-wettability surface.

17.
Nanotechnology ; 33(7)2021 Nov 25.
Artigo em Inglês | MEDLINE | ID: mdl-34740207

RESUMO

For the electrochemcial hydrogen production, the oxygen evolution reaction (OER) is a pivotal half-reaction in water splitting. However, OER suffers sluggish kinetics and high overpotential, leading to the increase of overall energy consumption and decrease of the energy efficiency. In this work, high-quality cobalt oxide porous nanotubes (Co3O4-PNTs) are easily obtained by simple self-template approach. One-dimensional (1D) porous structure provides the large specific surface area, enough abundant active atoms and effective mass transfer. In addition, Co3O4-PNTs also own self-stability of 1D architecture, benefitting the their durability for electrocatalytic reaction. Thus, Co3O4-PNTs with optimal annealing temperature and time reveal the attractive alkaline OER performance (Tafel slope of 56 mV dec-1and 323 mV overpotential at 10 mA cm-2), which outperform the Co3O4nanoparticles and benchmark commercial RuO2nanoparticles. Furthermore, Co3O4-PNTs also exhibit excellent OER durability for least 10 h at the 10 mA cm-2. Overall, Co3O4-PNTs with low cost can be serve as a highly reactive and economical catalyst for OER.

18.
Nanotechnology ; 32(50)2021 Sep 29.
Artigo em Inglês | MEDLINE | ID: mdl-34375970

RESUMO

In order to reduce the overpotential of hydrogen evolution reaction (HER), the ternary coating Co-W-P was deposited on the surface of the nickel foam by electrochemical deposition to obtain a highly active electrode. Based on the measured double layer capacitance (Cdl) and HER activity, there is volcanic behavior between the intrinsic activity of Co-W-P and the Co:W ratio in the electrolyte. W and P play different roles in the formation of nanoparticles, and work together to achieve the large electrochemical surface area and excellent activity. When applied to the modification of other catalysts (Ni-P and Fe-P), the higher intrinsic activity was obtained after the introduction of W.

19.
Future Oncol ; 17(36): 5033-5044, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-34704468

RESUMO

Aims: The aim of this study was to explore the alteration in ACE2 expression and correlation between ACE2 expression and immune infiltration in clear cell renal cell carcinoma (ccRCC). Methods: The authors first analyzed the expression profiles and prognostic value of ACE2 in ccRCC patients using The Cancer Genome Atlas public database. The authors used ESTIMATE and CIBERSORT algorithms to analyze the correlation between ACE2 expression and tumor microenvironment in ccRCC samples. Results: ACE2 was correlated with sex, distant metastasis, clinical stage, tumor T stage and histological grade. Moreover, downregulation of ACE2 was correlated with unfavorable prognosis. In addition, ACE2 expression was associated with different immune cell subtypes. Conclusion: The authors' analyses suggest that ACE2 plays an important role in the development and progression of ccRCC and may serve as a potential prognostic biomarker in ccRCC patients.


Lay abstract To date, the morbidity and mortality of clear cell renal cell carcinoma (ccRCC) are gradually increasing, and ccRCC is more aggressive than other kidney cancer types. The ACE2 protein could alter other protein activity and promote cancer progression. In this study, the authors used publicly available databases, analyzed the ACE2 expression patterns in ccRCC cells and evaluated the link between the presence of ACE2 and the ability of immune cells to enter tumors. Finally, the authors conducted further analyses to explore the mechanism by which ACE2 may be involved in ccRCC cancer progression. The authors found that the presence and activity of ACE2 were low in advanced ccRCC and that this was linked to worse overall survival.


Assuntos
Enzima de Conversão de Angiotensina 2/genética , Carcinoma de Células Renais/genética , Neoplasias Renais/genética , Biomarcadores Tumorais/genética , Carcinoma de Células Renais/patologia , Biologia Computacional , Bases de Dados Genéticas , Regulação para Baixo , Humanos , Neoplasias Renais/patologia , Nomogramas , Prognóstico , Microambiente Tumoral/imunologia
20.
Health Commun ; 36(2): 146-157, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-31538502

RESUMO

This study combined theory from the fields of communication, behavioral ecology, and ecological psychology to examine how relevant factors about food influence the timing and trajectory of our decision-making after exposure to food advertisements. Young healthy adult participants (N = 108) completed a forced-choice, speeded decision-making latency task before and after viewing a set of advertisements. Results suggested that participants were more appetitively motivated by more energy-dense foods (i.e., higher calorie per gram) using direct food cues (i.e., were directly available to the senses, were visible), but after exposure to advertisements, this predisposition was less pronounced. Advertisement food cues were also important in decision-making, especially in coalition with the food cues used in the decision-making task stimuli. This study supports an optimal foraging perspective being expanded to human behavioral contexts in a modern landscape. Food advertising and packaging cues interacted with energy density level of food to provide information relevant to biological imperatives, which significantly altered food consumption decisions.


Assuntos
Publicidade , Alimentos , Sinais (Psicologia) , Ingestão de Energia , Humanos , Embalagem de Produtos , Adulto Jovem
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA