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1.
J Ethnopharmacol ; 336: 118711, 2025 Jan 10.
Artículo en Inglés | MEDLINE | ID: mdl-39181286

RESUMEN

ETHNOPHARMACOLOGICAL RELEVANCE: According to the theory of Qi and blood in Traditional Chinese Medicine (TCM), the combination of Qi-reinforcing herbs and blood-activating herbs has a synergistic effect in improving blood stasis syndrome, especially in tumor treatment. The classic "Radix Astragali - Salvia miltiorrhiza" duo exemplifies this principle, renowned for invigorating Qi and activating blood flow, employed widely in tumor therapies. Our prior research underscores the potent inhibition of pancreatic tumor xenografts by the combination of Formononetin (from Radix Astragali) and Salvianolic acid B (from Salvia miltiorrhiza) in vitro. However, it remains unclear whether this combination can inhibit the abnormal vascularization of pancreatic tumors to achieve its anti-cancer effect. AIM OF THE STUDY: Abnormal vasculature, known to facilitate tumor growth and metastasis. Strategies to normalize tumor-associated blood vessels provide a promising avenue for anti-tumor therapy. This study aimed to unravel the therapeutic potential of Formononetin combined with Salvianolic acid B (FcS) in modulating pancreatic cancer's impact on endothelial cells, illuminate the underlying mechanisms that govern this therapeutic interaction, thereby advancing strategies to normalize tumor vasculature and combat cancer progression. MATERIALS AND METHODS: A co-culture system involving Human Umbilical Vein Endothelial Cells (HUVECs) and PANC-1 cells was established to investigate the potential of targeting abnormal vasculature as a novel anti-tumor therapeutic strategy. We systematically compared HUVEC proliferation, migration, invasion, and lumenogenesis in both mono- and co-culture conditions with PANC-1 (H-P). Subsequently, FcS treatment of the H-P system was evaluated for its anti-angiogenic properties. Molecular docking was utilized to predict the interactions between Formononetin and Salvianolic acid B with RhoA, and the post-treatment expression of RhoA in HUVECs was assessed. Furthermore, we utilized shRhoA lentivirus to elucidate the role of RhoA in FcS-mediated effects on HUVECs. In vivo, a zebrafish xenograft tumor model was employed to assess FcS's anti-tumor potential, focusing on cancer cell proliferation, migration, apoptosis, and vascular development. RESULTS: FcS treatment demonstrated a significant, dose-dependent inhibition of PANC-1-induced alterations in HUVECs, including proliferation, migration, invasion, and tube formation capabilities. Molecular docking analyses indicated potential interactions between FcS and RhoA. Further, FcS treatment was found to downregulate RhoA expression and modulated the PI3K/AKT signaling pathway in PANC-1-induced HUVECs. Notably, the phenotypic inhibitory effects of FcS on HUVECs were attenuated by RhoA knockdown. In vivo zebrafish studies validated FcS's anti-tumor activity, inhibiting cancer cell proliferation, metastasis, and vascular sprouting, while promoting tumor cell apoptosis. CONCLUSIONS: This study underscores the promising potential of FcS in countering pancreatic cancer-induced endothelial alterations. FcS exhibits pronounced anti-abnormal vasculature effects, potentially achieved through downregulation of RhoA and inhibition of the PI3K/Akt signaling pathway, thereby presenting a novel therapeutic avenue for pancreatic cancer management.


Asunto(s)
Benzofuranos , Movimiento Celular , Células Endoteliales de la Vena Umbilical Humana , Isoflavonas , Neoplasias Pancreáticas , Proteína de Unión al GTP rhoA , Isoflavonas/farmacología , Humanos , Neoplasias Pancreáticas/tratamiento farmacológico , Neoplasias Pancreáticas/patología , Animales , Benzofuranos/farmacología , Proteína de Unión al GTP rhoA/metabolismo , Línea Celular Tumoral , Células Endoteliales de la Vena Umbilical Humana/efectos de los fármacos , Movimiento Celular/efectos de los fármacos , Neovascularización Patológica/tratamiento farmacológico , Pez Cebra , Proliferación Celular/efectos de los fármacos , Células Endoteliales/efectos de los fármacos , Células Endoteliales/metabolismo , Antineoplásicos Fitogénicos/farmacología , Depsidos
2.
Int J Biol Macromol ; : 135349, 2024 Sep 04.
Artículo en Inglés | MEDLINE | ID: mdl-39242004

RESUMEN

ß-1,3-Glucanases are essential enzymes involved in the hydrolysis of ß-1,3-glucans, with significant biological and industrial relevance. These enzymes are derived from diverse sources, including bacteria, fungi, plants, and animals, each exhibiting unique substrate specificities and biochemical properties. This review provides an in-depth analysis of the natural sources and ecological roles of ß-1,3-glucanases, exploring their enzymatic properties such as optimal pH, temperature, molecular weight, isoelectric points, and kinetic parameters, which are crucial for understanding their functionality and stability. Advances in molecular enzymology are discussed, focusing on gene cloning, expression in systems like Escherichia coli and Pichia pastoris, and structural-functional relationships. The reaction mechanisms and the role of non-catalytic carbohydrate-binding modules in enhancing substrate hydrolysis are examined. Industrial applications of ß-1,3-glucanases are highlighted, including the production of ß-1,3-glucooligosaccharides, uses in the food industry, biological control of plant pathogens, and nutritional roles. This review aims to provide a foundation for future research, improving the efficiency and robustness of ß-1,3-glucanases for various industrial applications.

5.
Photodiagnosis Photodyn Ther ; : 104330, 2024 Sep 06.
Artículo en Inglés | MEDLINE | ID: mdl-39245302

RESUMEN

BACKGROUND: Female vulvar lichen sclerosus (VLS) is a chronic inflammatory skin disease of the vulva and its etiology is unknown. The main clinical symptoms are itching, burning and dyspareunia, and there is a lack of effective treatment. METHODS: Clinical and follow-up data of women with VLS who underwent 5-Aminolevulinic acid photodynamic therapy (ALA-PDT) from January 2023 to December 2023 in the department of obstetrics and gynecology, Qilu Hospital of Shandong University, were retrospectively analyzed. According to the inclusion and exclusion criteria, 36 patients with VLS who received ineffective conventional treatment (intractable VLS) were enrolled. Objective signs and subjective symptoms of vulvar lesions were recorded before treatment and 6 months after the end of treatment according to corresponding scoring criteria. Quality of life was evaluated using the Dermatology Life Quality Index (DLQI). RESULTS: All patients received six sessions of ALA-PDT treatment and follow-up visits. After ALA-PDT treatment, 24 of 36 (66.67%) patients' itching symptoms completely disappeared, 10 of 36 (27.78%) patients' itching symptoms were relieved from severe to mild, and only 2 of 36 (5.56%) patients' symptoms were not significantly relieved. 16 of 36 (44.4%) patients' itching symptoms completely disappeared, 9 of 36 (25%) patients' itching symptoms were relieved from severe to mild, and only 2 of 36 (5.56%) patients still had severe pain. Compared to 22 patients with dyspareunia before treatment, only 9 patients still had dyspareunia with varying degrees of dyspareunia relief after treatment. Clinical signs improved significantly in the patients after ALA-PDT treatment. The total scores of clinical signs were (5.31±1.67 vs 3.67±1.71) before and after treatment. All patients showed improvement in DLQI after treatment. The main side effects of ALA-PDT were pain, erythema and swelling which were transient and tolerable. All patients were "satisfied" or "very satisfied" with the results of the treatment. CONCLUSIONS: ALA-PDT is a safe and effective treatment for women with intractable vulva lichen sclerosus.

6.
Carbohydr Polym ; 346: 122663, 2024 Dec 15.
Artículo en Inglés | MEDLINE | ID: mdl-39245517

RESUMEN

Concerns about food safety and environmental impact from chemical surfactants have prompted interest in natural lignocellulosic materials as alternatives. In this study, we combined hydrated deep eutectic solvent (DES) pretreatment with ultrasound treatment to prepare lignocellulosic nanofibrils (LCNF) from bamboo shoot shells with appropriate surface properties for stabilizing Pickering emulsions. The pretreatment intensity effectively modulated the surface characteristics of LCNF, achieving desirable wettability through lignin retention and in-situ esterification. The resulting LCNF/curcumin Pickering emulsion (CPE) demonstrated curcumin protection and pH-responsive color changes, while the ensuing CPE/PVA composite film exhibited ultraviolet shielding, mechanical strength, oxygen barrier, and antioxidant properties. Furthermore, the CPE/PVA film showed promise as a real-time indicator for monitoring shrimp freshness, maintaining sensitivity to spoilage even after six months of storage. These findings advance the advancement of green LCNF technologies, providing eco-friendly solutions for valorizing bamboo shoot shells and enhancing the application of LCNF in Pickering emulsions.


Asunto(s)
Curcumina , Emulsiones , Lignina , Nanofibras , Curcumina/química , Lignina/química , Emulsiones/química , Animales , Nanofibras/química , Antioxidantes/química , Disolventes Eutécticos Profundos/química , Brotes de la Planta/química , Sasa/química , Humectabilidad , Concentración de Iones de Hidrógeno
7.
Adv Mater ; : e2409893, 2024 Sep 05.
Artículo en Inglés | MEDLINE | ID: mdl-39235570

RESUMEN

Aminopeptidases are exopeptidases that catalyze the cleavage of amino acid residues from the N-terminal fragment of protein or peptide substrates. Owing to their function, they play important roles in protein maturation, signal transduction, cell-cycle control, and various disease mechanisms, notably in cancer pathology. To gain better insights into their function, molecular imaging assisted by fluorescence and bio/chemiluminescence probes has become an indispensable method to their superiorities, including excellent sensitivity, selectivity, and real-time and noninvasive imaging. Numerous efforts are made to develop activatable probes that can effectively enhance efficiency and accuracy as well as minimize the side effects. This review is classified according to the type of aminopeptidases, summarizing some recent works on the design, work mechanism, and sensing, imaging, and theranostic performance of their activatable probe. Finally, the current challenges are outlined in developing activatable probes for aminopeptidases and provide possible solutions for future advancements.

8.
Front Cell Infect Microbiol ; 14: 1446580, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39239636

RESUMEN

Hypertensive disorders of pregnancy (HDP) are severe complications of pregnancy with high morbidity and are a major cause of increased maternal and infant morbidity and mortality. Currently, there is a lack of effective early diagnostic indicators and safe and effective preventive strategies for HDP in clinical practice, except for monitoring maternal blood pressure levels, the degree of proteinuria, organ involvement and fetal conditions. The intestinal microbiota consists of the gut flora and intestinal environment, which is the largest microecosystem of the human body and participates in material and energy metabolism, gene expression regulation, immunity regulation, and other functions. During pregnancy, due to changes in hormone levels and altered immune function, the intestinal microecological balance is affected, triggering HDP. A dysregulated intestinal microenvironment influences the composition and distribution of the gut flora and changes the intestinal barrier, driving beneficial or harmful bacterial metabolites and inflammatory responses to participate in the development of HDP and promote its malignant development. When the gut flora is dysbiotic and affects blood pressure, supplementation with probiotics and dietary fiber can be used to intervene. In this review, the interaction between the intestinal microbiota and HDP was investigated to explore the feasibility of the gut flora as a novel biomarker of HDP and to provide a new strategy and basis for the prevention and treatment of clinical HDP.


Asunto(s)
Biomarcadores , Microbioma Gastrointestinal , Probióticos , Humanos , Embarazo , Femenino , Probióticos/uso terapéutico , Hipertensión Inducida en el Embarazo/microbiología , Disbiosis , Animales , Fibras de la Dieta
9.
Mycopathologia ; 189(5): 78, 2024 Sep 02.
Artículo en Inglés | MEDLINE | ID: mdl-39222187

RESUMEN

We describe for the first time, a high-quality genome for a rare human yeast pathogen Candida mucifera, from a patient with chronic suppurative otitis media. This pathogen exhibited reduced azole susceptibility, similar to its close relatives within the Trichomonascus ciferrii species complex.


Asunto(s)
Candida , Genoma Fúngico , Otitis Media , Secuenciación Completa del Genoma , Humanos , Candida/genética , Candida/aislamiento & purificación , Candida/clasificación , Otitis Media/microbiología , Antifúngicos/farmacología , Antifúngicos/uso terapéutico , Azoles/farmacología , Pruebas de Sensibilidad Microbiana , Análisis de Secuencia de ADN
10.
PeerJ ; 12: e18018, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39282119

RESUMEN

Background: Although CA19-9 is an essential blood biomarker of pancreatic cancer (PC), its sensitivity and specificity are limited for early detection. Methods: We analyzed the serum proprotein convertase subtilisin/kexin type 9 (sPCSK9) in PC patients, benign disease groups (BDG), and healthy controls (HC) by ELISA. Results: Consistently, sPCSK9 was considerably lower in PC patients than in HC (Z = -2.546, P < 0.05), and sPCSK9 in PC patients was statistically significantly higher than in BDG (Z = -5.457, P < 0.001). sPCSK9 was linked to the invasion of lymph nodes (χ2 = 6.846, P < 0.01). According to ROC curves, combining sPCSK9 with CA19-9 could potentially enhance the diagnostic capability of CA19-9 in early-stage PC patients. Furthermore, the low sPCSK9 group (n = 41) exhibited statistically significantly prolonged overall survival compared to the high sPCSK9 group (n = 15), with median survival times of 27 months (95% CI [17.59-36.41]) and 11 months (95% CI [7.21-14.79]), respectively (P = 0.022). Conclusion: The diagnostic performance of CA19-9 for early-stage PC patients could be improved by combining sPCSK9 with CA19-9. Moreover, the higher sPCSK9 group has a significantly shorter overall survival rate.


Asunto(s)
Biomarcadores de Tumor , Neoplasias Pancreáticas , Proproteína Convertasa 9 , Humanos , Neoplasias Pancreáticas/sangre , Neoplasias Pancreáticas/diagnóstico , Neoplasias Pancreáticas/mortalidad , Masculino , Biomarcadores de Tumor/sangre , Femenino , Persona de Mediana Edad , Pronóstico , Proproteína Convertasa 9/sangre , Anciano , Adulto , Ensayo de Inmunoadsorción Enzimática , Antígeno CA-19-9/sangre , Sensibilidad y Especificidad , Curva ROC
11.
Rev Cardiovasc Med ; 25(8): 274, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-39228477

RESUMEN

Background: The impact of cardiac arrest (CA) at admission on the prognosis of patients with acute myocardial infarction (AMI) complicated by cardiogenic shock (CS) remains a subject of debate. Methods: We conducted a retrospective study at West China Hospital from 2018 to 2021, enrolling 247 patients with AMI complicated by CS (AMI-CS). Patients were categorized into CA and non-CA groups based on their admission status. Univariate and multivariate Cox regression analyses were performed, with 30-day and 1-year mortality as the primary endpoints. Kaplan-Meier plots were constructed, and concordance (C)-indices of the Global Registry of Acute Coronary Event (GRACE) score, Intra-aortic Balloon Pump in Cardiogenic Shock (IABP-SHOCK) II score, and IABP-SHOCK II score with CA were calculated. Results: Among the enrolled patients, 39 experienced CA and received cardiopulmonary resuscitation at admission. The 30-day and 1-year mortality rates were 40.9% and 47.0%, respectively. Neither univariate nor multivariate Cox regression analyses identified CA as a significant risk factor for 30-day and 1-year mortality. In C-statistics, the GRACE score exhibited a moderate effect (C-indices were 0.69 and 0.67, respectively), while the IABP-SHOCK II score had a better predictive performance (C-indices were 0.79 and 0.76, respectively) for the 30-day and 1-year mortality. Furthermore, CA did not enhance the predictive value of the IABP-SHOCK II score for 30-day (p = 0.864) and 1-year mortality (p = 0.888). Conclusions: Cardiac arrest at admission did not influence the survival of patients with AMI-CS. Active resuscitation should be prioritized for patients with AMI-CS, regardless of the presence of cardiac arrest.

12.
Nutrients ; 16(17)2024 Sep 06.
Artículo en Inglés | MEDLINE | ID: mdl-39275329

RESUMEN

Heyndrickxia coagulans (formerly Bacillus coagulans) has been increasingly utilized as an immunomodulatory probiotics. Oral administration of H. coagulans HOM5301 significantly boosted both innate and adaptive immunity in mice, particularly by increasing the phagocytic capacity of monocytes/macrophages. Lipoteichoic acid (LTA), a major microbe-associated molecular pattern (MAMP) in Gram-positive bacteria, exhibits differential immunomodulatory effects due to its structural heterogeneity. We extracted, purified, and characterized LTA from H. coagulans HOM5301. The results showed that HOM5301 LTA consists of a glycerophosphate backbone. Its molecular weight is in the range of 10-16 kDa. HOM5301 LTA induced greater productions of nitric oxide, TNFα, and IL-6 in RAW 264.7 macrophages compared to Staphylococcus aureus LTA. Comparative transcriptome and proteome analyses identified the differentially expressed genes and proteins triggered by HOM5301 LTA. KEGG analyses revealed that HOM5301 LTA transcriptionally and translationally activated macrophages through two immune-related pathways: cytokine-cytokine receptor interaction and phagosome formation. Protein-protein interaction network analysis indicated that the pro-inflammatory response elicited by HOM5301 LTA was TLR2-dependent, possibly requiring the coreceptor CD14, and is mediated via the MAPK and NF-kappaB pathways. Our results demonstrate that LTA is an important MAMP of H. coagulans HOM5301 that boosts immune responses, suggesting that HOM5301 LTA may be a promising immunoadjuvant.


Asunto(s)
Lipopolisacáridos , Macrófagos , Ácidos Teicoicos , Animales , Ácidos Teicoicos/farmacología , Ratones , Lipopolisacáridos/farmacología , Macrófagos/efectos de los fármacos , Macrófagos/inmunología , Macrófagos/metabolismo , Células RAW 264.7 , Bacillus , Receptor Toll-Like 2/metabolismo , Óxido Nítrico/metabolismo , Factor de Necrosis Tumoral alfa/metabolismo , Interleucina-6/metabolismo , Probióticos/farmacología
13.
Foods ; 13(17)2024 Aug 24.
Artículo en Inglés | MEDLINE | ID: mdl-39272435

RESUMEN

Fructilactobacillus sanfranciscensis, the dominant species of lactic acid bacteria in sourdoughs, impacts the microstructure and flavor of steamed bread through exopolysaccharide production, acidification, proteolysis, and volatile compound generation. The aim of this study is to investigate the phenotypic diversity and technological traits of 28 F. sanfranciscensis strains of different genotypes isolated from Chinese traditional sourdoughs. The results showed that F. sanfranciscensis strains exhibited substantial variation in proteinase and peptidase activities and the amount of acidification and volatiles in fermented sourdoughs. However, we observed no significant differences in exopolysaccharide production among the strains. The strains Sx14 and Ts1 were further chosen for transcriptomics to gain a deep insight into their intraspecies diversity in sourdough fermentation. Significant transcriptome differentiations between these two strains after 12 h fermentation in sourdoughs were revealed. According to the results, the strain Sx14 possessed higher dipeptidase and aminopeptidase activities, galactose utilization, and lactic and acetic acid production abilities, whereas Ts1 showed higher transmembrane transport of substrates and fructose utilization.

14.
Cancers (Basel) ; 16(17)2024 Aug 29.
Artículo en Inglés | MEDLINE | ID: mdl-39272864

RESUMEN

Diffuse large B cell lymphoma (DLBCL) is the most diagnosed, aggressive non-Hodgkin lymphoma, with ~40% of patients experiencing refractory or relapsed disease. Given the low response rates to current therapy, alternative treatment strategies are necessary to improve patient outcomes. Here, we sought to develop an easily accessible new xenograft mouse model that better recapitulates the human disease for preclinical studies. We generated two Luciferase (Luc)-EGFP-expressing human DLBCL cell lines representing the different DLBCL cell-of-origin subtypes. After intravenous injection of these cells into humanized NSG mice, we monitored the tumor growth and evaluated the organ-specific engraftment/progression period. Our results showed that human IL6-expressing NSG (NSG-IL6) mice were highly permissive for DLBCL cell growth. In NSG-IL6 mice, systemic engraftments of both U2932 activated B cell-like- and VAL germinal B cell-like-DLBCL (engraftment rate; 75% and 82%, respectively) were detected within 2nd-week post-injection. In the organ-specific ex vivo evaluation, both U2932-Luc and VAL-Luc cells were initially engrafted and expanded in the spleen, liver, and lung and subsequently in the skeleton, ovary, and brain. Consistent with the dual BCL2/MYC translocation association with poor patient outcomes, VAL cells showed heightened proliferation in human IL6-conditioned media and caused rapid tumor expansion and early death in the engrafted mice. We concluded that the U2932 and VAL cell-derived human IL6-expressing mouse models reproduced the clinical features of an aggressive DLBCL with a highly consistent pattern of tumor development. Based on these findings, NSG mice expressing human IL6 have the potential to serve as a new tool to develop DLBCL xenograft models to overcome the limitations of standard subcutaneous DLBCL xenografts.

15.
Int J Mol Sci ; 25(17)2024 Aug 25.
Artículo en Inglés | MEDLINE | ID: mdl-39273160

RESUMEN

Alzheimer's disease (AD) is a multifaceted neurodegenerative disorder characterized by cognitive decline and neuronal loss, representing a most challenging health issue. We present a computational analysis of transcriptomic data of AD tissues vs. healthy controls, focused on the elucidation of functional roles played by long non-coding RNAs (lncRNAs) throughout the AD progression. We first assembled our own lncRNA transcripts from the raw RNA-Seq data generated from 527 samples of the dorsolateral prefrontal cortex, resulting in the identification of 31,574 novel lncRNA genes. Based on co-expression analyses between mRNAs and lncRNAs, a co-expression network was constructed. Maximal subnetworks with dense connections were identified as functional clusters. Pathway enrichment analyses were conducted over mRNAs and lncRNAs in each cluster, which served as the basis for the inference of functional roles played by lncRNAs involved in each of the key steps in an AD development model that we have previously built based on transcriptomic data of protein-encoding genes. Detailed information is presented about the functional roles of lncRNAs in activities related to stress response, reprogrammed metabolism, cell polarity, and development. Our analyses also revealed that lncRNAs have the discerning power to distinguish between AD samples of each stage and healthy controls. This study represents the first of its kind.


Asunto(s)
Enfermedad de Alzheimer , Redes Reguladoras de Genes , ARN Largo no Codificante , Enfermedad de Alzheimer/genética , Enfermedad de Alzheimer/metabolismo , ARN Largo no Codificante/genética , Humanos , Transcriptoma , Perfilación de la Expresión Génica , ARN Mensajero/genética , ARN Mensajero/metabolismo , Regulación de la Expresión Génica , Biología Computacional/métodos
16.
Molecules ; 29(17)2024 Sep 03.
Artículo en Inglés | MEDLINE | ID: mdl-39275019

RESUMEN

To meet the demands for high-temperature performance and lightweight materials in aerospace engineering, the Au-Ni solder is often utilized for joining dissimilar materials, such as Ti3Al-based alloys and Ni-based high-temperature alloys. However, the interaction between Ti and Ni can lead to the formation of brittle phases, like Ti2Ni, TiNi, and TiNi3, which diminish the mechanical properties of the joint and increase the risk of crack formation during the welding process. Cu doping has been shown to enhance the mechanical properties and high-temperature stability of the Au-Ni brazed joint's central area. Due to the difficulty in accurately controlling the solid solution content of Cu in the Au-Ni alloy, along with the high cost of Au, traditional experimental trial-and-error methods are insufficient for the development of Au-based solders. In this study, first principles calculations based on density functional theory were employed to analyze the effect of Cu content on the stability of the Au-2.0Ni-xCu (x = 0, 0.25, 0.5, 0.75, 1.0, 1.25 wt%) alloy phase structure. The thermal properties of the alloy were determined using Gibbs software fitting. The results indicate that the Au-2.0Ni-0.25Cu alloy exhibits the highest plastic toughness (B/G = 5.601, ν = 0.416, Cauchy pressure = 73.676 GPa) and a hardness of 1.17 GPa, which is 80% higher than that of Au-2.0Ni. This alloy balances excellent strength and plastic toughness, meeting the mechanical performance requirements of brazed joints. The constant pressure specific heat capacity (Cp) of the Au-2.0Ni-xCu alloy is higher than that of Au-2.0Ni and increases with Cu content. At 1000 K, the Cp of the Au-2.0Ni-0.25Cu alloy is 35.606 J·mol-1·K-1, which is 5.88% higher than that of Au-2.0Ni. The higher Cp contributes to enhanced high-temperature stability. Moreover, the linear expansion coefficient (CTE) of the Au-2.0Ni-0.25Cu alloy at 1000 K is 8.76 × 10-5·K-1, only 0.68% higher than Au-2.0Ni. The lower CTE helps to reduce the risk of solder damage caused by thermal stress. Therefore, the Au-2.0Ni-0.25Cu alloy is more suitable for brazing applications in high-temperature environments due to its excellent mechanical properties and thermal stability. This study provides a theoretical basis for the performance optimization and engineering application of the Au-2.0Ni-xCu alloy as a gold-based solder.

17.
Opt Lett ; 49(18): 5292-5295, 2024 Sep 15.
Artículo en Inglés | MEDLINE | ID: mdl-39270288

RESUMEN

We present a general strategy for synthesizing astigmatic random structured light beams by jointly manipulating the astigmatic phase and optical coherence. With it, we facilitate the creation of a distinct category of beams termed astigmatic non-uniformly correlated (ANUC) beams. Our study emphasizes the significant influence of the astigmatic phase on the optical spatial coherence distribution, resulting in novel propagation features. Furthermore, we elucidate their underlying physical nature. Experimentally, we successfully generate such beams, validating theoretical projections. Our findings hold promise for diverse applications requiring adaptable spectral density control.

18.
Environ Pollut ; : 124918, 2024 Sep 09.
Artículo en Inglés | MEDLINE | ID: mdl-39260553

RESUMEN

Cadmium (Cd) is a dangerous environmental contaminant. Jute (Corchorus sp.) is an important natural fiber crop with strong absorption and excellent adaptability to metal-stressed environments, used in the phytoextraction of heavy metals. Understanding the genetic and molecular mechanisms underlying Cd tolerance and accumulation in plants is essential for efficient phytoremediation strategies and breeding novel Cd-tolerant cultivars. Here, machine learning (ML) and hyperspectral imaging (HSI) combining genome-wide association studies (GWAS) and RNA-seq reveal the genetic basis of Cd resistance and absorption in jute. ML needs a small number of plant phenotypes for training and can complete the plant phenotyping of large-scale populations with efficiency and accuracy greater than 90%. In particular, a candidate gene for Cd resistance (COS02g_02406) and a candidate gene (COS06g_03984) associated with Cd absorption are identified in isoflavonoid biosynthesis and ethylene response signaling pathways. COS02g_02406 may enable plants to cope with metal stress by regulating isoflavonoid biosynthesis involved in antioxidant defense and metal chelation. COS06g_03984 promotes the binding of Cd2+ to ETR/ERS, resulting in Cd absorption and tolerance. The results confirm the feasibility of high-throughput phenotyping for studying plant Cd tolerance by combining HSI and ML approaches, facilitating future molecular breeding.

19.
Drug Metab Dispos ; 2024 Sep 11.
Artículo en Inglés | MEDLINE | ID: mdl-39261014

RESUMEN

Antifolates are important for chemotherapy in non-small cell lung cancer (NSCLC). They mainly rely on reduced folate carrier (RFC) and proton-coupled folate transporter (PCFT) to enter cells. PCFT is supposed to be the dominant transporter of the two in tumors as it operates optimally at acidic pH and has limited transport activity at physiological pH, whereas RFC operates optimally at neutral pH. In this study, we found RFC showed a slightly pH-dependent uptake of antifolates, with similar affinity values at pH 7.4 and 6.5. PCFT showed a highly pH-dependent uptake of antifolates with an optimum pH of 6.0 for pemetrexed and 5.5 for methotrexate. The Km value of PCFT for pemetrexed at pH 7.4 was more than 10 times higher than that at pH 6.5. Interestingly, we found antifolate accumulations mediated by PCFT at acidic pH were significantly affected by the efflux transporter, breast cancer resistance protein (BCRP). The highest pemetrexed concentration was observed at pH 7.0 - 7.4 after a 60-minute accumulation in PCFT-expressing cells, which was further evidenced by the cytotoxicity of pemetrexed, with the IC50 value of pemetrexed at pH 7.4 being one-third of that at pH 6.5. In addition, the in vivo study indicated increasing PCFT and RFC expression significantly enhanced the antitumor efficacy of pemetrexed despite the high expression of BCRP. These results suggest that both RFC and PCFT are important for antifolates accumulation in NSCLC, although there is an acidic microenvironment and high BCRP expression in tumors. Significance Statement Evaluating the role of RFC and PCFT on antifolates accumulation in NSCLC is necessary for new drug designs. By using RFC- or PCFT-expressing NSCLC cell models, we found that both RFC and PCFT were important for antifolates accumulation in NSCLC, rather than only PCFT playing a dominant role. BCRP significantly affected PCFT-mediated antifolates accumulation at acidic pH, but not RFC-mediated pemetrexed accumulation at physiological pH. High expression of PCFT or RFC enhanced the cytotoxicity and antitumor effect of pemetrexed.

20.
Int J Biol Macromol ; 279(Pt 3): 135366, 2024 Sep 05.
Artículo en Inglés | MEDLINE | ID: mdl-39244129

RESUMEN

Abscisic acid (ABA) is a pivotal regulator of plant growth, development, and responses to environmental stresses. The ABA signaling pathway involves three key components: ABA receptors known as PYLs, PP2Cs, and SnRK2s, which are conserved across higher plants. This study comprehensively investigated the PYL-PP2C-SnRK gene family in pecan, identifying 14 PYL genes, 97 PP2C genes, and 44 SnRK genes, which were categorized into subgroups through phylogenetic and sequence structure analysis. Whole-genome duplication (WGD) and dispersed duplication (DSD) were identified as major drivers of family expansion, and purifying selection was the primary evolutionary force. Tissue-specific expression analysis suggested diverse functions in different pecan tissues. qRT-PCR validation confirmed the involvement of CiPawPYLs, CiPawPP2CAs, and CiPawSnRK2s in salt stress response. Subcellular localization analysis revealed CiPawPP2C1 in the nucleus and CiPawPYL1 and CiPawSnRK2.1 in both the nucleus and the plasma membrane. In addition, VIGS indicated that CiPawSnRK2.1-silenced pecan seedling leaves display significantly reduced salt tolerance. Y2H and LCI assays verified that CiPawPP2C3 can interact with CiPawPYL5, CiPawPYL8, and CiPawSnRK2.1. This study characterizes the role of CiPawSnRK2.1 in salt stress and lays the groundwork for exploring the CiPawPYL-PP2C-SnRK module, highlighting the need to investigate the roles of other components in the pecan ABA signaling pathway.

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