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1.
J Cell Mol Med ; 28(6): e18223, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38451046

RESUMEN

Hepatoblastoma (HB), a primary liver tumour, is notorious for its high metastatic potential and poor prognosis. Ganoderma lucidum, an edible mushroom species utilized in traditional Chinese medicine for addressing various tumour types, presents an intriguing avenue for HB treatment. However, the effectiveness of G. lucidum in managing HB and its underlying molecular mechanism necessitates further exploration. Standard in vitro assays were conducted to evaluate the impact of sporoderm-broken spores of G. lucidum (SBSGL) on the malignant characteristics of HB cells. The mechanism of SBSGL in treating HB and its tumour immunomodulatory effects were explored and validated by various experiments, including immunoprecipitation, Western blotting, mRFP-GFP-LC3 adenovirus transfection and co-localization analysis, as well as verified with in vivo experiments in this regard. The results showed that SBSGL effectively inhibited the malignant traits of HB cells and suppressed the O-GlcNAcylation of RACK1, thereby reducing its expression. In addition, SBSGL inhibited immune checkpoints and regulated cytokines. In conclusion, SBSGL had immunomodulatory effects and regulated the malignancy and autophagy of HB by regulating the O-GlcNAcylation of RACK1. These findings suggest that SBSGL holds promise as a potential anticancer drug for HB treatment.


Asunto(s)
Hepatoblastoma , Neoplasias Hepáticas , Reishi , Hepatoblastoma/tratamiento farmacológico , Hepatoblastoma/genética , Esporas Fúngicas , Autofagia , Neoplasias Hepáticas/tratamiento farmacológico , Neoplasias Hepáticas/genética
2.
Anal Chem ; 96(23): 9570-9575, 2024 Jun 11.
Artículo en Inglés | MEDLINE | ID: mdl-38822787

RESUMEN

MicroRNA (miRNA) and apurinic/apyrimidinic endonuclease 1 (APE1) have been reported to be closely associated with cancers, making them potential crucial biomarkers and therapeutic targets. However, focusing on the detection of a single target is not conducive to the diagnosis and prognosis assessment of diseases. In this study, an AND logic-gate-based dual-locking hairpin-mediated catalytic hairpin assembly (DL-CHA) was developed for sensitive and specific detection of microRNA and APE1. By addition of a lock to each of the hairpins, with APE1 and microRNA serving as keys, fluorescence signals could only be detected in the presence of simultaneous stimulation by APE1 and miRNA-224. This indicated that the biosensor could operate as an AND logic gate. DL-CHA exhibited advantages such as a low background, rapid response, and high logic capability. Therefore, the biosensor serves as a novel approach to cancer diagnosis with significant potential applications.


Asunto(s)
Técnicas Biosensibles , ADN-(Sitio Apurínico o Apirimidínico) Liasa , MicroARNs , MicroARNs/análisis , ADN-(Sitio Apurínico o Apirimidínico) Liasa/metabolismo , Humanos , Técnicas Biosensibles/métodos , Lógica , Límite de Detección
3.
Small ; : e2311527, 2024 Feb 09.
Artículo en Inglés | MEDLINE | ID: mdl-38334257

RESUMEN

Stretchable organic transistors for skin-like biomedical applications require low-voltage operation to accommodate limited power supply and safe concerns. However, most of the currently reported stretchable organic transistors operate at relatively high voltages. Decreasing their operational voltage while keeping the high mobility still remains a key challenge. Here, the study presents a new dielectric design to achieve high-dielectric constant poly(urea-urethane) (PUU) elastomer, by incorporating a flexible small-molecular diamine crosslinking agent 4-aminophenyl disulfide (APDS) into the main chain of (poly (propylene glycol), tolylene 2,4-diiso-cyanate terminated) (PPG-TDI). Compared with commercial elastomers, the PUU elastomer as dielectric of the stretchable organic transistors shows the outstanding advantages including lower surface roughness (0.33 nm), higher adhesion (45.18 nN), higher dielectric constant (13.5), as well as higher stretchability (896%). The PUU dielectric enables the intrinsically stretchable, all-solution-processed organic transistor to operate at a low operational voltage down to -10 V, while preserving a substantial mobility of 1.39 cm2  V-1  s-1 . Impressively, the transistor also demonstrates excellent electrical stability under repeated switching of 10 000 cycles, and remarkable mechanical robustness when stretched up to 100%. The work opens up a new molecular engineering strategy to successfully realize low-voltage high-mobility stretchable all-solution-processed organic transistors.

4.
J Transl Med ; 22(1): 484, 2024 May 21.
Artículo en Inglés | MEDLINE | ID: mdl-38773604

RESUMEN

BACKGROUND: The aim of this study was to conduct an in silico analysis of a novel compound heterozygous variant in breast cancer susceptibility gene 2 (BRCA2) to clarify its structure-function relationship and elucidate the molecular mechanisms underlying triple-negative breast cancer (TNBC). METHODS: A tumor biopsy sample was obtained from a 42-year-old Chinese woman during surgery, and a maxBRCA™ test was conducted using the patient's whole blood. We obtained an experimentally determined 3D structure (1mje.pdb) of the BRCA2 protein from the Protein Data Bank (PDB) as a relatively reliable reference. Subsequently, the wild-type and mutant structures were predicted using SWISS-MODEL and AlphaFold, and the accuracy of these predictions was assessed through the SAVES online server. Furthermore, we utilized a high ambiguity-driven protein-protein docking (HADDOCK) algorithm and protein-ligand interaction profiler (PLIP) to predict the pathogenicity of the mutations and elucidate pathogenic mechanisms that potentially underlies TNBC. RESULTS: Histological examination revealed that the tumor biopsy sample exhibited classical pathological characteristics of TNBC. Furthermore, the maxBRCA™ test revealed two compound heterozygous BRCA2 gene mutations (c.7670 C > T.pA2557V and c.8356G > A.pA2786T). Through performing in silico structural analyses and constructing of 3D models of the mutants, we established that the mutant amino acids valine and threonine were located in the helical domain and oligonucleotide binding 1 (OB1), regions that interact with DSS1. CONCLUSION: Our analysis revealed that substituting valine and threonine in the helical domain region alters the structure and function of BRCA2 proteins. This mutation potentially affects the binding of proteins and DNA fragments and disrupts interactions between the helical domain region and OB1 with DSS1, potentially leading to the development of TNBC. Our findings suggest that the identified compound heterozygous mutation contributes to the clinical presentation of TNBC, providing new insights into the pathogenesis of TNBC and the influence of compound heterozygous mutations in BRCA2.


Asunto(s)
Proteína BRCA2 , Simulación por Computador , Mutación , Humanos , Femenino , Adulto , Mutación/genética , Proteína BRCA2/genética , Proteína BRCA2/química , Proteína BRCA2/metabolismo , Simulación del Acoplamiento Molecular , Neoplasias de la Mama Triple Negativas/genética , Neoplasias de la Mama Triple Negativas/patología , Genes BRCA2 , Secuencia de Bases
5.
Langmuir ; 40(1): 380-388, 2024 Jan 09.
Artículo en Inglés | MEDLINE | ID: mdl-38153039

RESUMEN

Surface-enhanced Raman spectroscopy (SERS) has emerged as a highly sensitive trace detection technique in recent decades, yet its exceptional performance remains elusive in semiconductor materials due to the intricate and ambiguous nature of the SERS mechanism. Herein, we have synthesized MoS2 nanoflowers (NFs) decorated with Au nanoparticles (NPs) by hydrothermal and redox methods to explore the size-dependence SERS effect. This strategy enhances the interactions between the substrate and molecules, resulting in exceptional uniformity and reproducibility. Compared to the unadorned Au nanoparticles (NPs), the decoration of Au NPs induces an n-type effect on MoS2, resulting in a significant enhancement of the SERS effect. This augmentation empowers MoS2 to achieve a low limit of detection concentration of 2.1 × 10-9 M for crystal violet (CV) molecules and the enhancement factor (EF) is about 8.52 × 106. The time-stability for a duration of 20 days was carried out, revealing that the Raman intensity of CV on the MoS2/Au-6 substrate only exhibited a reduction of 24.36% after undergoing aging for 20 days. The proposed mechanism for SERS primarily stems from the synergistic interplay among the resonance of CV molecules, local surface plasma resonance (LSPR) of Au NPs, and the dual-step charge transfer enhancement. This research offers comprehensive insights into SERS enhancement and provides guidance for the molecular design of highly sensitive SERS systems.

6.
Fish Shellfish Immunol ; 149: 109573, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38636742

RESUMEN

This research elucidates the potential of Lycium barbarum residue (LBR), a by-product rich in bioactive substances, as a dietary supplement in aquaculture, especially for herbivorous fish like grass carp. In a detailed 120-day feeding trial, the impacts of varying LBR levels on juvenile grass carp were assessed, focusing on growth performance, survival rate, biochemical markers, and liver health. The study identified a 6% inclusion rate of LBR as optimal for enhancing survival and growth while mitigating hepatic lipid accumulation. Composition analysis of this diet revealed high concentrations of polysaccharides and flavonoids. Notably, the intake of LBR was found to enhance the antioxidant and immune-related enzymatic activities in the liver. Furthermore, it contributed to a reduction in hepatic fat deposition by decreasing the levels of triglycerides (TG) and total cholesterol (T-CHO) both in the liver and serum. Transcriptomic analysis of the liver highlighted LBR's substantial influence on lipid metabolism pathways, including the PPAR signaling pathway, primary bile acid biosynthesis, cholesterol metabolism, bile secretion, fat digestion and absorption, fatty acid degradation and fatty acid biosynthesis. Further, the expression level of genes pinpointed significant downregulation of fasn and dgat2, alongside upregulation of genes like pparda, cpt1b, cpt1ab and abca1b, in response to LBR supplementation. Overall, the findings present LBR as a promising enhancer of growth and survival in grass carp, with significant benefits in promoting fat metabolism and liver health, offering valuable insights for aquacultural nutrition strategies.


Asunto(s)
Alimentación Animal , Carpas , Dieta , Suplementos Dietéticos , Hígado , Animales , Carpas/crecimiento & desarrollo , Carpas/inmunología , Alimentación Animal/análisis , Hígado/metabolismo , Suplementos Dietéticos/análisis , Dieta/veterinaria , Metabolismo de los Lípidos/efectos de los fármacos , Lycium/química
7.
Fish Shellfish Immunol ; 147: 109453, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38365163

RESUMEN

miRNAs are increasingly recognized for their crucial role in autophagy processes. Recent research has highlighted the significant function of autophagy in modulating immune responses. Within this context, specific miRNAs have been identified as indirect mediators of immune functions through their modulation of autophagy. In this study, we verified that miR-193b-5p simultaneously targeted the grass carp autophagy-related gene deptor, thereby reducing autophagy levels in CIK cells. Moreover, we found the expression levels of miR-193b-5p and deptor responding to pathogen infections in the GCRV-infected CIK cells. Notably, the overexpression of miR-193b-5p was found to induce the GCRV replication and reduce the irf3, irf7 and IFN1 expression. These findings also demonstrated that grass carp miR-193b-5p impacted the proliferation, migration, and antiapoptotic abilities of CIK cells. All the above results indicated that miR-193b-5p was linked to grass carp autophagy and played a vital role in antiviral immunity by targeting deptor. Our study may provide important insights into autophagy-related miRNAs and their roles in defense and immune mechanisms against pathogens in teleost.


Asunto(s)
Carpas , Enfermedades de los Peces , MicroARNs , Infecciones por Reoviridae , Reoviridae , Animales , Reoviridae/fisiología , Carpas/metabolismo , Autofagia , MicroARNs/metabolismo , Proteínas de Peces/genética
8.
Fish Shellfish Immunol ; 149: 109524, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38527657

RESUMEN

Recent studies have increasingly linked miRNAs with the modulation of inflammatory responses and immunosuppressive activities. This investigation reveals that mir-30e-3p selectively binds to and modulates gimap8, as demonstrated by luciferase reporter assays and qPCR analyses. Upon LPS stimulation of CIK cells, mir-30e-3p expression was notably elevated, inversely correlating with a decrease in gimap8 mRNA levels. Overexpression of mir-30e-3p attenuated the mRNA levels of pro-inflammatory cytokines beyond the effect of LPS alone, suggesting a regulatory role of mir-30e-3p in inflammation mediated by the gimap8 gene. These insights contribute to our understanding of the complex mechanisms governing inflammatory and immune responses.


Asunto(s)
Carpas , Proteínas de Peces , Inflamación , Lipopolisacáridos , MicroARNs , Animales , MicroARNs/genética , Proteínas de Peces/genética , Proteínas de Peces/inmunología , Lipopolisacáridos/farmacología , Carpas/genética , Carpas/inmunología , Inflamación/genética , Inflamación/inmunología , Regulación de la Expresión Génica/inmunología , Regulación de la Expresión Génica/efectos de los fármacos , Riñón/inmunología , Inmunidad Innata/genética , Línea Celular
9.
Fish Shellfish Immunol ; 149: 109586, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38670410

RESUMEN

Recent research has highlighted complex and close interaction between miRNAs, autophagy, and viral infection. In this study, we observed the autophagy status in CIK cells infected with GCRV at various time points. We found that GCRV consistently induced cellar autophagy from 0 h to 12 h post infection. Subsequently, we performed deep sequencing on CIK cells infected with GCRV at 0 h and 12 h respectively, identifying 38 DEMs and predicting 9581 target genes. With the functional enrichment analyses of GO and KEGG, we identified 35 autophagy-related target genes of these DEMs, among which akt3 was pinpointed as the most central hub gene using module assay of the PPI network. Then employing the miRanda and Targetscan programs for prediction, and verification through a double fluorescent enzyme system and qPCR method, we confirmed that miR-193 b-3p could target the 3'-UTR of grass carp akt3, reducing its gene expression. Ultimately, we illustrated that grass carp miR-193 b-3p could promote autophagy in CIK cells. Above results collectively indicated that miRNAs might play a critical role in autophagy of grass carp during GCRV infection and contributed significantly to antiviral immunity by targeting autophagy-related genes. This study may provide new insights into the intricate mechanisms involved in virus, autophagy, and miRNAs.


Asunto(s)
Autofagia , Carpas , Enfermedades de los Peces , MicroARNs , Proteínas Proto-Oncogénicas c-akt , Infecciones por Reoviridae , Reoviridae , Animales , MicroARNs/genética , MicroARNs/inmunología , Carpas/inmunología , Carpas/genética , Enfermedades de los Peces/inmunología , Enfermedades de los Peces/virología , Infecciones por Reoviridae/inmunología , Infecciones por Reoviridae/veterinaria , Proteínas Proto-Oncogénicas c-akt/genética , Proteínas Proto-Oncogénicas c-akt/inmunología , Proteínas Proto-Oncogénicas c-akt/metabolismo , Reoviridae/fisiología , Secuenciación de Nucleótidos de Alto Rendimiento , Proteínas de Peces/genética , Proteínas de Peces/inmunología , Línea Celular , Regulación de la Expresión Génica/inmunología
10.
J Nanobiotechnology ; 22(1): 189, 2024 Apr 17.
Artículo en Inglés | MEDLINE | ID: mdl-38632615

RESUMEN

Although gene expression signatures offer tremendous potential in diseases diagnostic and prognostic, but massive gene expression signatures caused challenges for experimental detection and computational analysis in clinical setting. Here, we introduce a universal DNA-based molecular classifier for profiling gene expression signatures and generating immediate diagnostic outcomes. The molecular classifier begins with feature transformation, a modular and programmable strategy was used to capture relative relationships of low-concentration RNAs and convert them to general coding inputs. Then, competitive inhibition of the DNA catalytic reaction enables strict weight assignment for different inputs according to their importance, followed by summation, annihilation and reporting to accurately implement the mathematical model of the classifier. We validated the entire workflow by utilizing miRNA expression levels for the diagnosis of hepatocellular carcinoma (HCC) in clinical samples with an accuracy 85.7%. The results demonstrate the molecular classifier provides a universal solution to explore the correlation between gene expression patterns and disease diagnostics, monitoring, and prognosis, and supports personalized healthcare in primary care.


Asunto(s)
Carcinoma Hepatocelular , Neoplasias Hepáticas , Humanos , Transcriptoma , Perfilación de la Expresión Génica , Neoplasias Hepáticas/genética , ADN , Biomarcadores de Tumor/metabolismo , Regulación Neoplásica de la Expresión Génica
11.
Cell Mol Life Sci ; 80(12): 351, 2023 Nov 06.
Artículo en Inglés | MEDLINE | ID: mdl-37930455

RESUMEN

Alzheimer's disease (AD) is traditionally considered as a brain disorder featured by amyloid-ß (Aß) deposition. The current study on whether pathological changes of AD extend to the enteric nervous system (ENS) is still in its infancy. In this study, we found enteric Aß deposition, intestinal dysfunction, and colonic inflammation in the young APP/PS1 mice. Moreover, these mice exhibited cholinergic and nitrergic signaling pathways damages and enteric neuronal loss. Our data show that Aß42 treatment remarkably affected the gene expression of cultured myenteric neurons and the spontaneous contraction of intestinal smooth muscles. The intra-colon administration of Aß42 induced ENS dysfunction, brain gliosis, and ß-amyloidosis-like changes in the wild-type mice. Our results suggest that ENS mirrors the neuropathology observed in AD brains, and intestinal pathological changes may represent the prodromal events, which contribute to brain pathology in AD. In summary, our findings provide new opportunities for AD early diagnosis and prevention.


Asunto(s)
Enfermedad de Alzheimer , Enfermedades Gastrointestinales , Ratones , Animales , Enfermedad de Alzheimer/genética , Ratones Transgénicos , Péptidos beta-Amiloides/genética , Neuronas
12.
J Sep Sci ; 47(1): e2300790, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-38234029

RESUMEN

Sinomenine is an active ingredient extracted from herb medicine, which has been prescribed to treat rheumatoid arthritis in clinics. The present work was to develop a simple method to simultaneously determine sinomenine and its metabolites desmethyl sinomenine and sinomenine N-oxide in rat plasma by liquid chromatography tandem mass spectrometry. Precursor-to-product transitions for detection were m/z 330.2 > 239.1 for sinomenine, m/z 316.2 > 239.1 for desmethyl-sinomenine, m/z 346.2 > 314.1 for sinomenine N-oxide and m/z 286.2 > 153.2 for morphine (internal standard), respectively. During the validation and sample quantification, an excellent linear calibration range was observed for all the analytes with correlation coefficients more than 0.999 (r > 0.99). The extraction recovery was more than 85%. No significant matrix effect and carryover were observed. The precision was less than 6.45%, whereas accuracy ranged from -4.10% to 7.23%. The validated method has been successfully applied to the pharmacokinetic study of sinomenine, desmethyl sinomenine, and sinomenine N-oxide in rat plasma after oral administration of sinomenine at a single dose of 5 mg/kg. The results suggested that sinomenine was rapidly metabolized into its metabolite desmethyl sinomenine and sinomenine N-oxide.


Asunto(s)
Morfinanos , Espectrometría de Masas en Tándem , Ratas , Animales , Espectrometría de Masas en Tándem/métodos , Reproducibilidad de los Resultados , Cromatografía Liquida/métodos , Cromatografía Líquida de Alta Presión/métodos
13.
Nucleic Acids Res ; 50(D1): D560-D570, 2022 01 07.
Artículo en Inglés | MEDLINE | ID: mdl-34664670

RESUMEN

The success of protein engineering and design has extensively expanded the protein space, which presents a promising strategy for creating next-generation proteins of diverse functions. Among these proteins, the synthetic binding proteins (SBPs) are smaller, more stable, less immunogenic, and better of tissue penetration than others, which make the SBP-related data attracting extensive interest from worldwide scientists. However, no database has been developed to systematically provide the valuable information of SBPs yet. In this study, a database named 'Synthetic Binding Proteins for Research, Diagnosis, and Therapy (SYNBIP)' was thus introduced. This database is unique in (a) comprehensively describing thousands of SBPs from the perspectives of scaffolds, biophysical & functional properties, etc.; (b) panoramically illustrating the binding targets & the broad application of each SBP and (c) enabling a similarity search against the sequences of all SBPs and their binding targets. Since SBP is a human-made protein that has not been found in nature, the discovery of novel SBPs relied heavily on experimental protein engineering and could be greatly facilitated by in-silico studies (such as AI and computational modeling). Thus, the data provided in SYNBIP could lay a solid foundation for the future development of novel SBPs. The SYNBIP is accessible without login requirement at both official (https://idrblab.org/synbip/) and mirror (http://synbip.idrblab.net/) sites.


Asunto(s)
Proteínas Bacterianas/clasificación , Proteínas Portadoras/genética , Bases de Datos de Proteínas , Proteínas/clasificación , Proteínas Bacterianas/química , Proteínas Portadoras/clasificación , Simulación por Computador , Humanos , Conformación Proteica , Ingeniería de Proteínas/tendencias , Proteínas/química
14.
Nucleic Acids Res ; 50(20): 11727-11737, 2022 11 11.
Artículo en Inglés | MEDLINE | ID: mdl-36318259

RESUMEN

CRISPR (clustered regularly interspaced short palindromic repeats) technology has achieved great breakthroughs in terms of convenience and sensitivity; it is becoming the most promising molecular tool. However, only two CRISPR activation modes (single and double stranded) are available, and they have specificity and universality bottlenecks that limit the application of CRISPR technology in high-precision molecular recognition. Herein, we proposed a novel CRISPR/Cas12a unrestricted activation mode to greatly improve its performance. The new mode totally eliminates the need for a protospacer adjacent motif and accurately activates Cas12a through toehold-mediated strand displacement and branch migration, which is highly universal and ultra-specific. With this mode, we discriminated all mismatch types and detected the EGFR T790M and L858R mutations in very low abundance. Taken together, our activation mode is deeply incorporated with DNA nanotechnology and extensively broadens the application boundaries of CRISPR technology in biomedical and molecular reaction networks.


Asunto(s)
Sistemas CRISPR-Cas , Neoplasias Pulmonares , Humanos , Receptores ErbB/genética , Neoplasias Pulmonares/genética , Mutación
15.
Biomed Chromatogr ; 38(5): e5833, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38291606

RESUMEN

XL092 is a potent ATP-competitive inhibitor of multiple receptor tyrosine kinases that is undergoing clinical development for the treatment of lung cancer. In this study, an LC triple quadrupole mass spectrometry method was established to measure XL092 in monkey plasma. A Waters ACQUITY UPLC BEH C18 column was used for chromatographic separation. The mobile phase consisted of water containing 0.1% formic acid and acetonitrile with a gradient elution at the flow rate of 0.4 mL/min. Multiple reaction monitoring mode was used for quantitative analysis of XL092 in positive electrospray ionization. In the concentration range of 0.5-1000 ng/mL, XL092 showed excellent linearity in monkey plasma with a correlation coefficient greater than 0.995 (r > 0.995). The lowest limit of quantification was 0.5 ng/mL. The intra- and inter-day relative standard deviations were <9.99%, while the relative error ranged from -12.50% to 8.10%. The mean recovery was over 82.51%. XL092 was stable in monkey plasma after storage under certain conditions. The validated method was demonstrated to be selective, sensitive, and reliable, and has been successfully applied to the pharmacokinetic study of XL092 in monkey plasma. XL092 showed moderate short half-life (~3.81 h) and good oral bioavailability (80%).


Asunto(s)
Espectrometría de Masas en Tándem , Animales , Reproducibilidad de los Resultados , Espectrometría de Masas en Tándem/métodos , Modelos Lineales , Masculino , Cromatografía Liquida/métodos , Límite de Detección , Sensibilidad y Especificidad , Cromatografía Líquida de Alta Presión/métodos , Macaca fascicularis , Estabilidad de Medicamentos
16.
Biopharm Drug Dispos ; 45(1): 30-42, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38236698

RESUMEN

SCO-267 is a potent G-protein-coupled receptor 40 agonist that is undergoing clinical development for the treatment of type 2 diabetes mellitus. The current work was undertaken to investigate the bioactivation potential of SCO-267 in vitro and in vivo. Three SCO-267-derived glutathione (GSH) conjugates (M1-M3) were found both in rat and human liver microsomal incubations supplemented with GSH and nicotinamide adenine dinucleotide phosphate. Two GSH conjugates (M1-M2) together with two N-acetyl-cysteine conjugates (M4-M5) were detected in the bile of rats receiving SCO-267 at 10 mg/kg. The identified conjugates suggested the generation of quinone-imine and ortho-quinone intermediates. CYP3A4 was demonstrated to primarily catalyze the bioactivation of SCO-267. In addition, SCO-267 concentration-, time-, and NADPH-dependently inactivated CYP3A in human liver microsomes using testosterone as a probe substrate, along with KI and kinact values of 4.91 µM and 0.036 min-1 , respectively. Ketoconazole (a competitive inhibitor of CYP3A) displayed no significant protective effect on SCO-267-induced CYP3A inactivation. However, inclusion of GSH showed significant protection. These findings revealed that SCO-267 undergoes a facile CYP3A4-catalyzed bioactivation with the generation of quinone-imine and ortho-quinone intermediates, which were assumed to be involved in SCO-267 induced CYP3A inactivation. These findings provide further insight into the bioactivation pathways involved in the generation of reactive, potentially toxic metabolites of SCO-267. Further studies are needed to evaluate the influence of SCO-267 metabolism on the safety of this drug in vivo.


Asunto(s)
Benzoquinonas , Citocromo P-450 CYP3A , Diabetes Mellitus Tipo 2 , Piperidinas , Piridinas , Humanos , Ratas , Animales , Citocromo P-450 CYP3A/metabolismo , Activación Metabólica , Diabetes Mellitus Tipo 2/metabolismo , Quinonas/metabolismo , Iminas/metabolismo , Microsomas Hepáticos/metabolismo , Glutatión/metabolismo
17.
Environ Toxicol ; 39(3): 1175-1186, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-37860912

RESUMEN

Magnetite nanoparticles (MNPs) have been extensively detected in the atmospheric environment and implicated as a prominent threat to atherosclerosis, a chronic vascular inflammatory disease. Due to globalization and economic development, the dramatic shift in diet from traditional to high-fat dietary patterns aggravated atherosclerosis progression induced by environmental factors. However, limited knowledge is available regarding vascular risks and underlying mechanisms of airborne MNPs in high-risk populations with high-fat dietary habits. Herein, we demonstrated that MNPs exerted a proatherogenic effect under high-fat dietary patterns, leading to aortic wall thickening, elastic fiber disorganization, macrophage infiltration, and local inflammation. Based on the correlation analysis between MNPs and PM group, we identified that MNPs might be a key PM component in atherogenic toxicity. MNPs exposure disturbed the dynamic process of lipid metabolism, manifested as aortic lipid accumulation, dyslipidemia, and hepatic lipid metabolism disorder, which was modulated by the JAK-STAT pathway. Overall, these findings provide new insight into understanding the cardiovascular risks and mechanisms of MNPs among high-risk populations.


Asunto(s)
Aterosclerosis , Nanopartículas de Magnetita , Humanos , Metabolismo de los Lípidos , Nanopartículas de Magnetita/toxicidad , Patrones Dietéticos , Quinasas Janus , Transducción de Señal , Factores de Transcripción STAT
18.
Br J Haematol ; 200(6): 776-791, 2023 03.
Artículo en Inglés | MEDLINE | ID: mdl-36341698

RESUMEN

Kawasaki disease (KD) is an acute systemic vasculitis primarily affecting infants and children. Activated platelets predispose patients to coronary artery structural lesions that may lead to thrombotic cardiovascular events. To discover potential proteins underlying platelet activation in KD, we conducted a protein chip assay of 34 cytokines and discovered thymic stromal lymphopoietin (TSLP) was aberrantly expressed, which remained elevated after intravenous immunoglobulin G (IVIG) treatment and during convalescence in KD patients in comparison to healthy controls. Enzyme-linked immunosorbent assay (ELISA) corroborated the upregulation of TSLP in KD patients, which was exacerbated in convalescent patients complicated with thrombosis. TSLP receptors on platelets were also significantly upregulated in KD patients complicated with thrombosis. Platelet activation, apoptosis, and mitochondrial autophagy (mitophagy) were increased in convalescence KD patients complicated with thrombosis. In vitro, TSLP induced platelet activation and platelet mitophagy in healthy blood donors, as observed in KD patients. TSLP, similar to mitophagy agonist carbonyl cyanide 3-chlorophenyl hydrazone (CCCP), promoted thrombosis, which was attenuated by the mitophagy inhibitor Mdivi-1. Co-immunoprecipitation in TSLP-treated platelets revealed TSLP receptor (TSLPR) bound to mitophagy regulators, Parkin and Voltage Dependent Anion Channel Protein 1 (VDAC1).Thus, our results demonstrated that TSLP induced platelet mitophagy via a novel TSLPR/Parkin/VDAC1 pathway that promoted thrombosis in KD. These results suggest TSLP as a novel therapeutic target against KD-associated thrombosis.


Asunto(s)
Plaquetas , Síndrome Mucocutáneo Linfonodular , Lactante , Niño , Humanos , Plaquetas/metabolismo , Linfopoyetina del Estroma Tímico , Mitofagia , Síndrome Mucocutáneo Linfonodular/terapia , Convalecencia , Citocinas/metabolismo , Ubiquitina-Proteína Ligasas/metabolismo
19.
Small ; 19(8): e2206181, 2023 02.
Artículo en Inglés | MEDLINE | ID: mdl-36504477

RESUMEN

Inspired by human eyes, the neuromorphic visual system employs a highly efficient imaging and recognition process, which offers tremendous advantages in image acquisition, data pre-processing, and dynamic storage. However, it is still an enormous challenge to simultaneously simulate the structure, function, and environmental adaptive behavior of the human eye based on one device. Here, a multimodal-synergistic-modulation neuromorphic imaging system based on ultraflexible synaptic transistors is successfully presented and firstly simulates the dry eye imaging behavior at the device level. Moreover, important functions of the human visual system in relation to optoelectronic synaptic plasticity, image erasure and enhancement, real-time preprocessing, and dynamic storage are simulated by versatile devices. This work not only simplifies the complexity of traditional neuromorphic visual systems, but also plays a positive role in the publicity of biomedical eye care.


Asunto(s)
Síndromes de Ojo Seco , Plasticidad Neuronal , Humanos
20.
Small ; : e2307421, 2023 Dec 10.
Artículo en Inglés | MEDLINE | ID: mdl-38072808

RESUMEN

DNA strand displacement reactions are vital for constructing intricate nucleic acid circuits, owing to their programmability and predictability. However, the scarcity of effective methods for eliminating circuit leakages has hampered the construction of circuits with increased complexity. Herein, a versatile strategy is developed that relies on a spatially controlled proximity split tweezer (PST) switch to transduce the biomolecular signals into the independent oligonucleotides. Leveraging the double-stranded rigidity of the tweezer works synergistically with the hindering effect of the hairpin lock, effectively minimizing circuit leakage compared with sequence-level methods. In addition, the freely designed output strand is independent of the target binding sequence, allowing the PST switch conformation to be modulated by nucleic acids, small molecules, and proteins, exhibiting remarkable adaptability to a wide range of targets. Using this platform, established logical operations between different types of targets for multifunctional transduction are successfully established. Most importantly, the platform can be directly coupled with DNA catalytic circuits to further enhance transduction performance. The uniqueness of this platform lies in its design straightforwardness, flexibility, scalable intricacy, and system compatibility. These attributes pave a broad path toward nucleic acid-based development of sophisticated transduction networks, making them widely applied in basic science research and biomedical applications.

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