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1.
J Dairy Sci ; 2024 Oct 14.
Artigo em Inglês | MEDLINE | ID: mdl-39414005

RESUMO

High blood concentrations of nonesterified fatty acids (NEFA) during ketosis enhance uptake by the mammary gland and impair autophagy while causing oxidative stress. Caveolin 1 (CAV1) is closely related to autophagy and plays a role in regulating oxidative stress. The aim of this study was to explore the potential role of CAV1 on oxidative stress and autophagy during a high NEFA challenge in the immortalized bovine mammary epithelial cell line MAC-T. Mammary gland tissue biopsies and blood samples were collected from healthy (n = 15) and clinically ketotic (n = 15) Holstein cows at 3 to 10 (average = 6) days in milk. Compared with healthy cows, ketotic cows had lower dry matter intake (DMI), daily milk yield, serum glucose and greater serum NEFA and BHBA, accompanied by greater milk fat and lower milk protein. Malondialdehyde (MDA) was greater but activities of superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH) were lower in cows with clinical ketosis. A lower protein abundance of CAV1, Beclin 1, autophagy relative gene 5 (ATG5), and microtubule-associated protein 1 light chain 3 (LC3) as well as greater protein abundance of sequestosome-1 (SQSTM1, also called p62) were detected in mammary tissue of cows with clinical ketosis. In vitro, the MAC-T cells were treated with 0, 0.6 and 1.2 mM NEFA for 12 h or treated with 1.2 mM NEFA for various time points (0, 0.5, 1, 2, 4, 8, 12 and 24 h). Compared with 0 mM NEFA, protein abundance of CAV1, Beclin 1, ATG5 and LC3 was greater in the MAC-T challenged with 0.6 mM NEFA, but lower in the 1.2 mM NEFA group. Protein abundance of p62 was lower with 0.6 mM NEFA, but higher with 1.2 mM NEFA. In response to increasing doses of NEFA, mRNA abundance of CAV1, total antioxidant capacity (T-AOC) and SOD activity decreased while the level of reactive oxygen species (ROS) and content of MDA increased. The protein abundance of CAV1, Beclin 1, ATG5 and LC3 peaked at 0.5 h and 1 h, resulting in both linear and quadratic effects. The protein abundance of p62 decreased, reaching a nadir at 4 h in both a linear and quadratic manner. The silencing of CAV1 in MAC-T cells aggravated the 1.2 mM NEFA-induced decrease in Beclin 1 expression, impaired autophagy, and increase in oxidative stress, whereas the overexpression of CAV1 alleviated these effects. Pretreatment of MAC-T cells with Beclin 1 siRNA (si-Beclin 1) and overexpressing CAV1 followed by challenged with 1.2 mM NEFA reversed the CAV1 induced autophagy, thereby enhancing oxidative stress. Overall, these data suggest that CAV1 protects bovine mammary epithelial cells from NEFA-induced oxidative stress through enhancing the expression of Beclin 1 and activating autophagy.

2.
J Colloid Interface Sci ; 679(Pt A): 296-306, 2024 Sep 29.
Artigo em Inglês | MEDLINE | ID: mdl-39366259

RESUMO

The oxygen evolution reaction (OER) at the anode undergoes a sluggish multi-step process, thereby impeding overall water splitting. As the classical adsorbate evolution mechanism (AEM) involves multiple oxygen-containing intermediates, such as *OH, *O and *OOH, breaking the linear relationship of the adsorption energies between *OH and *OOH is the key to efficient oxygen evolution. Herein, we report a high-entropy FeCoNiAlZn layered double hydroxide decorated with defects (E-FeCoNiAlZn LDH) for boosting oxygen evolution in alkaline. The product exhibits high OER activity with a low overpotential of 220 at 10 mA cm-2 and outstanding stability with negligible decline after 100 h operation. The defects in E-FeCoNiAlZn LDH not only enhance the adsorption of *OH by metal sites but also foster the release of oxygen from lattice, which triggers the coupled oxygen evolution mechanism (COM). This mechanism has only *OH and *OO intermediates, perfectly avoiding the obstacles of linear relationship between *OH and *OOH. Theoretical calculations demonstrate that the introduction of defects enhances the adsorption of *OH due to the presence of unsaturated bonds. Additionally, it is evidence that the O 2p band is elevated, leading to a weakening of the metal-O bond and a reduction of the energy barrier for OO coupling.

3.
Nanomicro Lett ; 17(1): 33, 2024 Oct 04.
Artigo em Inglês | MEDLINE | ID: mdl-39365405

RESUMO

Na3V2(PO4)3 (NVP) has garnered great attentions as a prospective cathode material for sodium-ion batteries (SIBs) by virtue of its decent theoretical capacity, superior ion conductivity and high structural stability. However, the inherently poor electronic conductivity and sluggish sodium-ion diffusion kinetics of NVP material give rise to inferior rate performance and unsatisfactory energy density, which strictly confine its further application in SIBs. Thus, it is of significance to boost the sodium storage performance of NVP cathode material. Up to now, many methods have been developed to optimize the electrochemical performance of NVP cathode material. In this review, the latest advances in optimization strategies for improving the electrochemical performance of NVP cathode material are well summarized and discussed, including carbon coating or modification, foreign-ion doping or substitution and nanostructure and morphology design. The foreign-ion doping or substitution is highlighted, involving Na, V, and PO43- sites, which include single-site doping, multiple-site doping, single-ion doping, multiple-ion doping and so on. Furthermore, the challenges and prospects of high-performance NVP cathode material are also put forward. It is believed that this review can provide a useful reference for designing and developing high-performance NVP cathode material toward the large-scale application in SIBs.

4.
J Hazard Mater ; 480: 136042, 2024 Oct 05.
Artigo em Inglês | MEDLINE | ID: mdl-39378593

RESUMO

Biological nests made of Modified Basalt Fiber (MBF bio-nests) serve as effective carriers for enhancing wastewater treatment. However, little is known about their performance when exposed to nano-plastics. This study investigates the decontamination efficiency and microbial functionality of four types of MBF and traditional Basalt Fibers (BF) as carriers in contact oxidation reactors. Compared to BF, MBF demonstrated superior growth effects and biocompatibility within the bio-nest. Ca-MBF and Mn-MBF bio-nests exhibited the highest and most uniform absorption capacities, respectively, alongside increased secretion of total Extracellular Polymeric Substances (EPS) and higher Protein to Sugar (PN/PS) ratios. In sewage environments, all MBF groups displayed stable performance in removing NH4+-N and COD. Significant removal of TN and TP was notably observed in Mn-MBF treatments. Mn and Ca treatments predominantly influenced the Proteobacteria and Bacteroidetes phyla, crucial for nitrogen and phosphorus removal. Following exposure to nano-plastics, Mn-MBF and Ca-MBF treatments maintained high decontamination efficiency, particularly for TP and COD (48.64 % to 57.78 % and 90.91 % to 92.89 %, respectively). The significant removal of NH4+-N and TP only occurred in Mn-MBF and Ca-MBF treatments, which stimulated the growth of bacteria resistant to nano-plastics. Key genera such as Zoogloea and Meganema were identified as dominant, contributing to organic matter decomposition, EPS secretion, biofilm condensation, and enhanced microbial attachment. The findings underscore the structural stability enhancement of Mn-MBF and Ca-MBF bio-nests in contact oxidation reactors, demonstrating their resilience against nano-plastic pollution.

5.
Adv Mater ; : e2409278, 2024 Oct 03.
Artigo em Inglês | MEDLINE | ID: mdl-39363675

RESUMO

While the high-entropy strategy is highly effective in enhancing the performance of materials across various fields, an optimal methodology for selecting component elements for performance optimization is still lacking. Here the findings on uncovering the element selection rules for rational design of high-entropy alloy anodes with exceptional lithium storage performance are reported. It is investigated high-entropy element screening rules by modifying stable diamond-structured Ge with P to induce a tetrahedrally coordinated sphalerite structure for enhanced metallic conductivity, further stabilized by incorporating Zn and other elements. Moreover, both theoretical and experimental results confirm that Li-storage performance improves with increasing atomic number: BZnGeP3 < AlZnGeP3 < GaZnGeP3 < InZnGeP3. InZnGeP3-based electrodes demonstrate the highest Li-ion affinity, fastest electronic and Li-ion transport, largest Li-storage capacity and reversibility, and best mechanical integrity. Further element screening based on the above criteria leads to high entropy alloy anodes with metallic conductivity like GaCuSnInZnGeP6, GaCu(or Sn)InZnGeP5, CuSnInZnGeP5, InZnGePSeS(or Te), InZnGeP2S(or Se) which show superior Li-storage performances. The excellent phase stability is attributed to their high configurational entropy. This study offers profound insights into element screening for high-entropy alloy-based anodes in Li-ion batteries, providing guidance and reference for the element combination and screening of other high-entropy functional materials.

6.
World J Gastrointest Oncol ; 16(9): 3913-3931, 2024 Sep 15.
Artigo em Inglês | MEDLINE | ID: mdl-39350977

RESUMO

BACKGROUND: The incidence of primary liver cancer is increasing year by year. In 2022 alone, more than 900000 people were diagnosed with liver cancer worldwide, with hepatocellular carcinoma (HCC) accounting for 75%-85% of cases. HCC is the most common primary liver cancer. China has the highest incidence and mortality rate of HCC in the world, and it is one of the malignant tumors that seriously threaten the health of Chinese people. The onset of liver cancer is occult, the early cases lack typical clinical symptoms, and most of the patients are already in the middle and late stage when diagnosed. Therefore, it is very important to find new markers for the early detection and diagnosis of liver cancer, improve the therapeutic effect, and improve the prognosis of patients. Protein tyrosine phosphatase non-receptor 2 (PTPN2) has been shown to be associated with colorectal cancer, triple-negative breast cancer, non-small cell lung cancer, and prostate cancer, but its biological role and function in tumors remain to be further studied. AIM: To combine the results of relevant data obtained from The Cancer Genome Atlas (TCGA) to provide the first in-depth analysis of the biological role of PTPN2 in HCC. METHODS: The expression of PTPN2 in HCC was first analyzed based on the TCGA database, and the findings were then verified by immunohistochemical staining, quantitative real-time polymerase chain reaction (qRT-PCR), and immunoblotting. The value of PTPN2 in predicting the survival of patients with HCC was assessed by analyzing the relationship between PTPN2 expression in HCC tissues and clinicopathological features. Finally, the potential of PTPN2 affecting immune escape of liver cancer was evaluated by tumor immune dysfunction and exclusion and immunohistochemical staining. RESULTS: The results of immunohistochemical staining, qRT-PCR, and immunoblotting in combination with TCGA database analysis showed that PTPN2 was highly expressed and associated with a poor prognosis in HCC patients. Kyoto Encyclopedia of Genes and Genomes enrichment analysis showed that PTPN2 was associated with various pathways, including cancer-related pathways, the Notch signaling pathway, and the MAPK signaling pathway. Gene Set Enrichment Analysis showed that PTPN2 was highly expressed in various immune-related pathways, such as the epithelial mesenchymal transition process. A risk model score based on PTPN2 showed that immune escape was significantly enhanced in the high-risk group compared with the low-risk group. CONCLUSION: This study investigated PTPN2 from multiple biological perspectives, revealing that PTPN2 can function as a biomarker of poor prognosis and mediate immune evasion in HCC.

7.
Cells ; 13(20)2024 Oct 14.
Artigo em Inglês | MEDLINE | ID: mdl-39451217

RESUMO

Mastitis is a common disease worldwide that affects the development of the dairy industry due to its high incidence and complex etiology. Precise regulation of cell death and survival plays a critical role in maintaining internal homeostasis, organ development, and immune function in organisms, and regulatory abnormalities are a common mechanism of various pathological changes. Recent research has shown that regulated cell death (RCD) plays a crucial role in mastitis. The development of drugs to treat cell death and survival abnormalities that can be widely used in mastitis treatment has important clinical significance. This paper will review the molecular mechanisms of apoptosis, autophagy, pyroptosis, ferroptosis, and necroptosis and their regulatory roles in mastitis to provide a new perspective for the targeted treatment of mastitis.


Assuntos
Mastite , Morte Celular Regulada , Humanos , Feminino , Animais , Mastite/prevenção & controle , Mastite/patologia , Autofagia/efeitos dos fármacos , Apoptose/efeitos dos fármacos , Necroptose , Piroptose/efeitos dos fármacos , Ferroptose/efeitos dos fármacos
8.
NPJ Parkinsons Dis ; 10(1): 189, 2024 Oct 20.
Artigo em Inglês | MEDLINE | ID: mdl-39428415

RESUMO

Parkinson's disease (PD) is a neurodegenerative disorder marked by the loss of dopaminergic neurons in the substantia nigra. Despite progress, the pathogenesis remains unclear. Human midbrain organoids (hMLOs) have emerged as a promising model for studying PD, drug screening, and potential treatments. This review discusses the development of hMLOs, their application in PD research, and current challenges in organoid construction, highlighting possible optimization strategies.

9.
Front Surg ; 11: 1477119, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39450297

RESUMO

Introduction: Systemic inflammatory response syndrome (SIRS) is a significant postoperative complication following lithotripsy, particularly in patients with positive urine cultures. Understanding the factors that contribute to the development of SIRS in these patients is crucial for improving clinical outcomes and reducing morbidity. Materials and methods: From 2022 to 2023, patients with preoperative positive urine culture who underwent minimally invasive uroscopic lithotripsy in Wuhan Union Hospital were retrospectively analyzed. Results: A total of 393 patients with positive urine cultures underwent endoscopic lithotripsy, and 13.2% (52/393) were diagnosed with SIRS by relevant indicators after surgery. Multivariate logistic regression was used to study the risk factors for the occurrence of SIRS in patients postoperatively, which were preoperative positive WBC in urinalysis (OR = 5.685, p = 0.0051) and postoperative hemoglobin drop of greater than 5 g/L (OR = 2.180, p = 0.0145). Notably, preoperative upper urinary tract drainage was found to be a protective factor (OR = 0.4029, p = 0.0302), and postoperative C-reactive protein (CRP) value (OR = 1.025, p < 0.0001) and procalcitonin (PCT) value (OR = 1.066, p < 0.0001) were predictive factors. Besides, postoperative hemoglobin drop showed a weak correlation with surgical duration (r = 0.1589, p = 0.0016). Conclusions: In summary, our study identifies key factors affecting the occurrence of SIRS after lithotripsy for urine culture-positive stone: preoperative positive WBC in urinalysis, postoperative hemoglobin drop, and preoperative upper urinary tract drainage. And monitoring postoperative CRP and PCT levels helps to predict SIRS.

10.
Ren Fail ; 46(2): 2400541, 2024 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-39248389

RESUMO

AIMS: Finerenone has been approved for treating diabetic kidney disease (DKD) with reducing cardiorenal risk. Real-world data on finerenone treatment for the management of DKD are presently lacking. This study aimed to investigate the effect of finerenone on the renal parameters of the Chinese DKD population in the real-world medical setting for the first time, especially in combination with renin-angiotensin system inhibitors (RASi) and sodium-glucose cotransporter 2 inhibitors (SGLT2i). METHODS: Forty-two DKD patients were selected and completed a 6-month finerenone treatment. Renal parameters and adverse effects were collected at every visit. RESULTS: The median urine albumin-to-creatinine ratio (UACR) was 1426.11 (755.42, 3638.23) mg/g. Among them, the proportion of patients with a UACR of 300-5000 mg/g was 76.2%, and the proportion of patients with a UACR of >5000 mg/g was 14.3%. The median estimated glomerular filtration rate (eGFR) was 54.50 (34.16, 81.73) mL/min/1.73 m2. Finerenone decreased the UACR significantly throughout the study period (p < .05). The maximal decline of UACR at month 6 was 73%. Moreover, the proportion of patients with a 30% or greater reduction in UACR was 68.42% in month 6. There was a smaller decline (9-11%) in the eGFR after initiating finerenone (p > .05). One patient each discontinued finerenone due to hyperkalemia (2.4%) and acute kidney injury (2.4%). No patient reported hypotension, breast pain, and gynecomastia. CONCLUSIONS: This study from China first demonstrated finerenone decreased UACR with manageable safety in real-world DKD treatment. A triple regimen of RASi, SGLT2i, and finerenone may be a promising treatment strategy for lowering albuminuria and reducing hyperkalemia risk in advanced DKD patients.


Assuntos
Nefropatias Diabéticas , Taxa de Filtração Glomerular , Naftiridinas , Inibidores do Transportador 2 de Sódio-Glicose , Humanos , Masculino , Feminino , Nefropatias Diabéticas/tratamento farmacológico , China , Pessoa de Meia-Idade , Idoso , Naftiridinas/uso terapêutico , Naftiridinas/efeitos adversos , Taxa de Filtração Glomerular/efeitos dos fármacos , Inibidores do Transportador 2 de Sódio-Glicose/uso terapêutico , Inibidores do Transportador 2 de Sódio-Glicose/efeitos adversos , Albuminúria/tratamento farmacológico , Antagonistas de Receptores de Mineralocorticoides/uso terapêutico , Antagonistas de Receptores de Mineralocorticoides/efeitos adversos , Creatinina/sangue , Creatinina/urina , Inibidores da Enzima Conversora de Angiotensina/uso terapêutico , Sistema Renina-Angiotensina/efeitos dos fármacos , Resultado do Tratamento
11.
Front Oncol ; 14: 1458616, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39296981

RESUMO

Renal cell carcinoma is a urological malignancy with a high metastatic rate, while targeted therapy for renal cell carcinoma still has much room for improvement. Some cutting-edge researches have focused on exosome in cancer treatment and there are some breakthroughs in breast cancer, lung cancer, and pancreatic cancer. Up to now, exosome in renal cell carcinoma progression and implications for targeted therapy has been under research by scientists. In this review, we have summarized the structure, formation, uptake, functions, and detection of exosomes, classified the mechanisms of exosomes that cause renal cell carcinoma progression, and listed the promising utilization of exosomes in targeted therapy for renal cell carcinoma. In all, based on the mechanisms of exosomes causing renal cell carcinoma progression and borrowing the successful experience from renal cell carcinoma models and other cancers, exosomes will possibly be a promising target for therapy in renal cell carcinoma in the foreseeable future.

12.
J Am Heart Assoc ; 13(18): e035858, 2024 Sep 17.
Artigo em Inglês | MEDLINE | ID: mdl-39258515

RESUMO

BACKGROUND: Serum corin has been associated with stroke in observational studies, but the underlying causality is uncertain. This study examined the causal association between corin and stroke through Mendelian randomization study. METHODS AND RESULTS: In the Gusu cohort, serum corin was assayed at baseline, and stroke incidents were prospectively obtained during 10 years of follow-up. Single-nucleotide polymorphisms (SNPs) in CORIN were genotyped by MassArray for 2310 participants (mean age, 53 years; 39% men). Seventeen SNPs passed the Hardy-Weinberg test and were considered the potential instruments. Only 1 SNP (rs2271037) determined variability of serum corin was significantly associated with stroke even after adjusting for conventional risk factors (hazard ratio [HR], 1.36 [95% CI, 1.00-1.85]). The weighted genetic risk score generated from the SNP-corin associations was significantly associated with stroke (HR, 2.01 [95% CI, 1.15-3.51]). Using this genetic risk score as the instrument, 1-sample Mendelian randomization analysis found a significant HR of stroke per-SD higher log2-transformed corin (HR, 1.37 [95% CI, 1.07-1.76]). The inverse variance-weighted analysis based on the SNP-corin and SNP-stroke associations found that the HR of stroke pre-SD higher log2-transformed corin was 5.92 (95% CI, 2.23-15.72). The effect estimates stayed consistent regardless of an individual SNP being removed from the instruments. An almost identical effect estimate was also confirmed by multiple other 2-sample Mendelian randomization methods. CONCLUSIONS: Genetically determined variations of serum corin concentration were significantly associated with the risk of stroke in Chinese adults. Elevated serum corin may be a risk factor for stroke.


Assuntos
Serina Endopeptidases , Acidente Vascular Cerebral , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Biomarcadores/sangue , China/epidemiologia , População do Leste Asiático/genética , Predisposição Genética para Doença , Incidência , Análise da Randomização Mendeliana , Polimorfismo de Nucleotídeo Único , Estudos Prospectivos , Medição de Risco , Fatores de Risco , Serina Endopeptidases/genética , Serina Endopeptidases/sangue , Acidente Vascular Cerebral/genética , Acidente Vascular Cerebral/sangue , Acidente Vascular Cerebral/epidemiologia
13.
Chemosphere ; 365: 143384, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-39306106

RESUMO

The first investigation based on constructed wetlands coupled with modified basalt fiber bio-nest (MBF-CWs) was performed under exposure of short- and long-chain perfluorocarboxylic acids (PFCAs). In general, both perfluorooctanoic acid (PFOA) and perfluorobutanoic acid (PFBA) caused significant decline of chemical oxygen demand removal by 10.83 % and 4.73 %. However, only PFOA led to marked inhibition on total phosphorus removal by 12.51 % in whole duration. Suppression of removal performance resulted from side impacts on microbes by PFOA. For instance, activities of key enzymes like dehydrogenase (DHA), urease (URE), and phosphatase (PST) decreased by 52.77 %, 40.70 %, and 56.94 % in maximum under PFOA stress, while URE could alleviate over time. By contrast, distinct inhibition was only found on PST in later phases with PFBA exposure. PFCAs had adverse influence on alpha diversity of MBF-CWs, particularly long-chain PFOA. Both PFCAs caused enrichment of Proteobacteria, owing to increase of Gammaproteobacteria and Plasticicumulans by 22.04-35.79 % and 22.91-219.77 %. Nevertheless, some dominant phyla (like Bacteroidota and Acidobacteriota) and genera (like SC-I-84, Thauera, Subgroup_10, and Ellin6067) were only suppressed by PFOA, causing more hazards to microbial decontamination than PFBA did. As for plants, chlorophyll contents tend to decrease with PFOA treatment. Whereas, higher antioxidase activities and more lipid peroxidation products were uncovered in PFOA group, demonstrating more reactive oxygen species brought by long-chain PFCAs. This work offered new findings about ecological effects of MBF-CWs under PFCAs exposure, evaluating stability and sustainability of MBF-CW systems to treat sewage containing complex PFCAs.


Assuntos
Caprilatos , Fluorocarbonos , Poluentes Químicos da Água , Áreas Alagadas , Fluorocarbonos/metabolismo , Caprilatos/metabolismo , Poluentes Químicos da Água/metabolismo , Fósforo/metabolismo , Eliminação de Resíduos Líquidos/métodos , Biodegradação Ambiental , Análise da Demanda Biológica de Oxigênio
14.
Scand J Clin Lab Invest ; : 1-7, 2024 Sep 16.
Artigo em Inglês | MEDLINE | ID: mdl-39283251

RESUMO

To establish age- and sex-specific reference intervals (RIs) for serum tumor markers (AFP, CEA, CA125, CA199, CA153, HE4, CA724, CYFRA21-1, PSA, and NSE) among a cohort of healthy individuals in South China, a retrospective analysis was conducted on 51,353 samples collected from 2015 to 2020, during health assessments at Guangdong Provincial People's Hospital. The influence of age and gender on serum tumor markers was investigated. New RIs were determined using non-parametric rank-based methods per CLSI EP28-A3C guidelines. Significant differences were detected across age groups for AFP, CEA, CA125, CA199, HE4, CYFRA21-1, PSA, and NSE (p < 0.05). The upper reference limits (URLs) for CA153 and HE4 are significantly lower compared to our current laboratory standards. The URL for CA125 exceeds these limits in individuals under 50 but decreases in those aged 50 and above. For CA199, CEA, and PSA, the URLs are below current standards in individuals younger than 60 but exceed them in those aged 60 and older. Noteworthy elevations were observed in CA724, CYFRA21-1, and NSE levels. Our study establishes age- and sex-specific RIs for ten serum tumor markers among healthy individuals from South China, providing a fundamental resource for the prevention, early detection, and management of tumor-related disorders.

15.
Adv Sci (Weinh) ; : e2402727, 2024 Sep 16.
Artigo em Inglês | MEDLINE | ID: mdl-39285656

RESUMO

Lattice materials are an emerging family of advanced engineering materials with unique advantages for lightweight applications. However, the mechanical behaviors of lattice materials at ultra-low relative densities are still not well understood, and this severely limits their lightweighting potential. Here, a high-precision micro-laser powder bed fusion technique is dveloped that enables the fabrication of metallic lattices with a relative density range much wider than existing studies. This technique allows to confirm that cubic lattices in compression undergo a yielding-to-buckling failure mode transition at low relative densities, and this transition fundamentally changes the usual strength ranking from plate > shell > truss at high relative densities to shell > plate > truss or shell > truss > plate at low relative densities. More importantly, it is shown that increasing bending energy ratio in the lattice through imperfections such as slightly-corrugated geometries can significantly enhance the stability and strength of lattice materials at ultra-low relative densities. This counterintuitive result suggests a new way for designing ultra-lightweight lattice materials at ultra-low relative densities.

16.
Arch Esp Urol ; 77(7): 818-825, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-39238308

RESUMO

OBJECTIVE: Retroperitoneal fibrosis is a rare disease characterized by chronic inflammation and fibrosis in the retroperitoneal space that may wrap around the ureter and cause an obstruction. Here we present the cases of three patients diagnosed and treated between April and August 2022. CASE PRESENTATION: Here we present three cases of retroperitoneal fibrosis. Imaging revealed hydronephrosis and/or ureteral dilation, whereas laboratory findings such as erythrocyte sedimentation rate, C-reactive protein, and immunoglobulin G4 were abnormal. Serum creatinine and blood urea nitrogen levels suggested renal injury. Additionally, two patients had unclear diagnoses from other hospitals. Later, all patients underwent ureteral stenting and laparoscopic ureterolysis at our hospital and simultaneous diagnosis by biopsy. The two patients with high immunoglobulin G4 levels exhibited extremely severe fibrosis. After discharge, each received maintenance prednisone to prevent recurrence as well as methotrexate, followed by follow-up every 3 months. Fortunately, serum creatinine, blood urea nitrogen, and intravenous urography findings remained normal with an average follow-up of 8.5 months. CONCLUSION: Here we discovered interesting findings in the diagnosis and treatment of retroperitoneal fibrosis, including the stable effect of medical plus surgical treatment, an unclear ureteral obstruction etiology, and the relationship between immunoglobulin G4 level and fibrosis hardness. However, the mechanisms behind these new findings require further study.


Assuntos
Fibrose Retroperitoneal , Humanos , Fibrose Retroperitoneal/diagnóstico , Fibrose Retroperitoneal/complicações , Masculino , Pessoa de Meia-Idade , Idoso , Feminino , Obstrução Ureteral/etiologia
17.
Drug Alcohol Depend ; 264: 112427, 2024 Sep 06.
Artigo em Inglês | MEDLINE | ID: mdl-39255741

RESUMO

INTRODUCTION: Previous studies and theoretical models suggest that the decreasing effect of smoking-related cues on inhibitory control in individuals who smoke is one of the underlying mechanisms of smoking behavior. However, many studies have overlooked the effects of other types of smoking-related cues, such as social cues. Moreover, previous studies have lacked investigation into whether this decreasing effect is influenced by internal factors. The present study aims to integrate behavioral and electrophysiological indicators to investigate the effect of smoking social cues on inhibitory control in individuals who smoke, as well as the moderating role of social motivations. METHOD: In Experiment 1, a visual Go/NoGo paradigm with four types of backgrounds (neutral, neutral social, smoking object, and smoking social backgrounds) was used to record the error rates and reaction times of 32 participants who smoke. In Experiment 2, the Go/NoGo paradigm with two types of backgrounds (smoking object and smoking social backgrounds) was used to record the error rates, reaction times, and amplitudes of the N2 and P3 event-related potentials among 30 participants who smoke with varying degrees of primed smoking social motivation. RESULTS: (1) Individuals who smoke had higher commission error rates and larger P3 amplitude under smoking social background than under smoking object background; (2) individuals who smoke with primed high smoking social motivation, rather than low motivation had higher commission error rates and larger P3 amplitude under smoking social background than under smoking object background. CONCLUSIONS: Smoking social cues have a greater capacity to decrease inhibitory control in people who smoke than smoking object cues, and this decreasing effect is bolstered by smoking social motivation.

18.
Phys Med Biol ; 69(16)2024 Aug 09.
Artigo em Inglês | MEDLINE | ID: mdl-39119998

RESUMO

Objective.Deep learning has markedly enhanced the performance of sparse-view computed tomography reconstruction. However, the dependence of these methods on supervised training using high-quality paired datasets, and the necessity for retraining under varied physical acquisition conditions, constrain their generalizability across new imaging contexts and settings.Approach.To overcome these limitations, we propose an unsupervised approach grounded in the deep image prior framework. Our approach advances beyond the conventional single noise level input by incorporating multi-level linear diffusion noise, significantly mitigating the risk of overfitting. Furthermore, we embed non-local self-similarity as a deep implicit prior within a self-attention network structure, improving the model's capability to identify and utilize repetitive patterns throughout the image. Additionally, leveraging imaging physics, gradient backpropagation is performed between the image domain and projection data space to optimize network weights.Main Results.Evaluations with both simulated and clinical cases demonstrate our method's effective zero-shot adaptability across various projection views, highlighting its robustness and flexibility. Additionally, our approach effectively eliminates noise and streak artifacts while significantly restoring intricate image details.Significance. Our method aims to overcome the limitations in current supervised deep learning-based sparse-view CT reconstruction, offering improved generalizability and adaptability without the need for extensive paired training data.


Assuntos
Aprendizado Profundo , Processamento de Imagem Assistida por Computador , Tomografia Computadorizada por Raios X , Processamento de Imagem Assistida por Computador/métodos , Humanos , Difusão , Razão Sinal-Ruído , Aprendizado de Máquina não Supervisionado
19.
Oncol Lett ; 28(3): 441, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39099583

RESUMO

Ovarian cancer is a malignant tumor that seriously endangers health. Early ovarian cancer symptoms are frequently challenging to detect, resulting in a large proportion of patients reaching an advanced stage when diagnosed. Conventional diagnosis relies heavily on serum biomarkers and pathological examination, but their sensitivity and specificity require improvement. Targeted therapy inhibits tumor growth by targeting certain characteristics of tumor cells, such as signaling pathways and gene mutations. However, the effectiveness of targeted therapy varies among individuals due to differences in their unique biological characteristics and requires individualized strategies. Immunotherapy is a promising treatment for ovarian cancer due to its long-lasting antitumor effect. Nevertheless, issues such as variable efficacy, immune-associated adverse effects and drug resistance remain to be resolved. The present review discusses the diagnostic strategies, rationale, treatment strategies and prospects of targeted therapy and immunotherapy for ovarian cancer.

20.
J Virol ; 98(9): e0122724, 2024 Sep 17.
Artigo em Inglês | MEDLINE | ID: mdl-39207136

RESUMO

Viruses deploy sophisticated strategies to hijack the host's translation machinery to favor viral protein synthesis and counteract innate cellular defenses. However, little is known about the mechanisms by which Senecavirus A (SVA) controls the host's translation. Using a series of sophisticated molecular cell manipulation techniques, heterogeneous nuclear ribonucleoprotein A2B1 (hnRNPA2B1) was identified as an essential host factor involved in translation control in SVA-infected cells. It was also determined that the SVA structural protein, VP3, binds to and relocalizes hnRNPA2B1, which interferes with the host's protein synthesis machinery to establish a cellular environment that facilitates viral propagation via a two-pronged strategy: first, hnRNPA2B1 serves as a potent internal ribosome entry site (IRES) trans-acting factor, which is selectively co-opted to promote viral IRES-driven translation by supporting the assembly of translation initiation complexes. Second, a strong repression of host cell translation occurs in the context of the VP3-hnRNPA2B1 interaction, resulting in attenuation of the interferons response. This is the first study to demonstrate the interaction between SVA VP3 and hnRNPA2B1, and to characterize their key roles in manipulating translation. This novel dual mechanism, which regulates selective mRNA translation and immune evasion of virus-infected cells, highlights the VP3-hnRNPA2B1 complex as a potential target for the development of modified antiviral or oncolytic reagents. IMPORTANCE: Viral reproduction is contingent on viral protein synthesis, which relies entirely on the host's translation machinery. As such, viruses often need to control the cellular translational apparatus to favor viral protein production and avoid host innate defenses. Senecavirus A (SVA) is an important virus, both as an emerging pathogen in the pork industry and as a potential oncolytic virus for neuroendocrine cancers. Here, heterogeneous nuclear ribonucleoprotein A2B1 (hnRNPA2B1) was identified as a critical regulator of the translational landscape during SVA infection. This study supports a model whereby the VP3 protein of SVA efficiently subverts the host's protein synthesis machinery through its ability to bind to and relocalize hnRNPA2B1, not only selectively promoting viral internal ribosome entry site-driven translation but also resulting in global translation shutdown and immune evasion. Together, these data provide new insights into how the complex interactions between translation machinery, SVA, and innate immunity contribute to the pathogenicity of the SVA.


Assuntos
Ribonucleoproteínas Nucleares Heterogêneas Grupo A-B , Imunidade Inata , Sítios Internos de Entrada Ribossomal , Picornaviridae , Biossíntese de Proteínas , Ribonucleoproteínas Nucleares Heterogêneas Grupo A-B/metabolismo , Humanos , Picornaviridae/imunologia , Interações Hospedeiro-Patógeno/imunologia , Células HEK293 , Replicação Viral , Evasão da Resposta Imune , Infecções por Picornaviridae/imunologia , Infecções por Picornaviridae/virologia , Infecções por Picornaviridae/metabolismo , Linhagem Celular
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