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1.
World J Hepatol ; 16(4): 537-549, 2024 Apr 27.
Artículo en Inglés | MEDLINE | ID: mdl-38689749

RESUMEN

The tumor microenvironment is a complex network of cells, extracellular matrix, and signaling molecules that plays a critical role in tumor progression and metastasis. Lymphatic and blood vessels are major routes for solid tumor metastasis and essential parts of tumor drainage conduits. However, recent studies have shown that lymphatic endothelial cells (LECs) and blood endothelial cells (BECs) also play multifaceted roles in the tumor microenvironment beyond their structural functions, particularly in hepatocellular carcinoma (HCC). This comprehensive review summarizes the diverse roles played by LECs and BECs in HCC, including their involvement in angiogenesis, immune modulation, lymphangiogenesis, and metastasis. By providing a detailed account of the complex interplay between LECs, BECs, and tumor cells, this review aims to shed light on future research directions regarding the immune regulatory function of LECs and potential therapeutic targets for HCC.

2.
Int Immunopharmacol ; 136: 112340, 2024 Jul 30.
Artículo en Inglés | MEDLINE | ID: mdl-38820962

RESUMEN

BACKGROUND: Adenosine deaminase acting on RNA 1 (ADAR1) is an RNA-editing enzyme that significantly impacts cancer progression and various biological processes. The expression of ADAR1 mRNA has been examined in multiple cancer types using The Cancer Genome Atlas (TCGA) dataset, revealing distinct patterns in kidney chromophobe (KICH), kidney renal clear cell carcinoma (KIRC), kidney renal papillary cell carcinoma (KIRP), and liver hepatocellular carcinoma (LIHC) compared to normal controls. However, the reasons for these differential expressions remain unclear. METHODS: In this study, we performed RT-PCR and western blotting (WB) to validate ADAR1 expression patterns in clinical tissue samples. Survival analysis and immune microenvironment analysis (including immune score and stromal score) were conducted using TCGA data to determine the specific cell types associated with ADAR1, as well as the key genes in those cell types. The relationship between ADAR1 and specific cell types' key genes was verified by immunohistochemistry (IHC), using clinical liver and kidney cancer samples. RESULTS: Our validation analysis revealed that ADAR1 expression was downregulated in KICH, KIRC, and KIRP, while upregulated in LIHC compared to normal tissues. Notably, a significant correlation was found between ADAR1 mRNA expression and patient prognosis, particularly in KIRC, KIRP, and LIHC. Interestingly, we observed a positive correlation between ADAR1 expression and stromal scores in KIRC, whereas a negative correlation was observed in LIHC. Cell type analysis highlighted distinct relationships between ADAR1 expression and the two stromal cell types, blood endothelial cells (BECs) and lymphatic endothelial cells (LECs), and further determined the signature gene claudin-5 (CLDN5), in KIRC and LIHC. Moreover, ADAR1 was inversely related with CLDN5 in KIRC (n = 26) and LIHC (n = 30) samples, verified via IHC. CONCLUSIONS: ADAR1 plays contrasting roles in LIHC and KIRC, associated with the enrichment of BECs and LECs within tumors. This study sheds light on the significant roles of stromal cells within the complex tumor microenvironment (TME) and provides new insights for future research in tumor immunotherapy and precision medicine.


Asunto(s)
Adenosina Desaminasa , Carcinoma Hepatocelular , Carcinoma de Células Renales , Regulación Neoplásica de la Expresión Génica , Neoplasias Renales , Neoplasias Hepáticas , Proteínas de Unión al ARN , Microambiente Tumoral , Adenosina Desaminasa/genética , Adenosina Desaminasa/metabolismo , Humanos , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/patología , Neoplasias Hepáticas/metabolismo , Carcinoma Hepatocelular/genética , Carcinoma Hepatocelular/metabolismo , Carcinoma Hepatocelular/patología , Carcinoma Hepatocelular/mortalidad , Neoplasias Renales/genética , Neoplasias Renales/patología , Neoplasias Renales/metabolismo , Neoplasias Renales/mortalidad , Carcinoma de Células Renales/genética , Carcinoma de Células Renales/metabolismo , Carcinoma de Células Renales/patología , Proteínas de Unión al ARN/metabolismo , Proteínas de Unión al ARN/genética , Pronóstico , Femenino , Masculino , Biomarcadores de Tumor/metabolismo , Biomarcadores de Tumor/genética , Persona de Mediana Edad
4.
Am J Transl Res ; 16(2): 387-399, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38463579

RESUMEN

Non-alcoholic fatty liver disease (NAFLD) is a complex disease characterized by a massive accumulation of lipids in the liver, with a continuous progression of simple steatosis, non-alcoholic steatohepatitis (NASH), cirrhosis, and hepatocellular carcinoma. Non-alcoholic fatty liver disease is associated with obesity, insulin resistance, and metabolic syndrome; it is a severe public health risk and is currently the most common liver disease of the world. In addition to the fatty infiltration of the liver in non-alcoholic fatty liver disease patients, the field of liver transplantation faces similar obstacles. NAFLD and NASH primarily involve lipotoxicity, inflammation, oxidative stress, and insulin resistance. However, the precise mechanisms and treatments remain unclear. Therapeutic approaches encompass exercise, weight control, as well as treatments targeting antioxidants and anti-inflammatory pathways. The role of animal models in research has become crucial as a key tool to explore the molecular mechanisms and potential treatments for non-alcoholic fatty liver disease and non-alcoholic steatohepatitis. Here, we summarized the current understanding of the pathogenesis of non-alcoholic fatty liver disease and non-alcoholic steatohepatitis and discussed animal models commonly used in recent years.

6.
Genes (Basel) ; 14(10)2023 10 19.
Artículo en Inglés | MEDLINE | ID: mdl-37895310

RESUMEN

Chemokines and their receptors play an important role in immune monitoring and immune defense during tumor growth and metastasis. However, their prognostic roles in pan-cancer have not been elucidated. In this work, we screened all chemokine receptors in pan-cancer and discovered X-C Motif Chemokine Receptor 1 (XCR1) as a reliable immunological and prognostic biomarker in pan-cancer using bioinformation. The TCGA database served as the foundation for the primary research database analysis in this work. XCR1 was downregulated in tumors. Patients with reduced XCR1 showed worse prognoses and a concomitant decrease in immune cell infiltration (DCs and CD8+ T cells). According to a gene enrichment study, XCR1 enhanced immune system performance by promoting T-cell infiltration through the C-X-C Motif Chemokine Ligand 9 (CXCL9)- C-X-C Motif Chemokine Receptor 3 (CXCR3) axis. In addition, XCR1 is mainly expressed in infiltrated DCs and some malignant cells in tumor tissues. Our data revealed the important role of XCR1 in remodeling the tumor microenvironment and predicting the survival prognosis, which could also be used as a sensitive biomarker for tumor immunotherapy.


Asunto(s)
Linfocitos T CD8-positivos , Neoplasias , Humanos , Biomarcadores , Neoplasias/genética , Pronóstico , Receptores de Quimiocina/genética , Microambiente Tumoral/genética
7.
Ecotoxicol Environ Saf ; 263: 115279, 2023 Sep 15.
Artículo en Inglés | MEDLINE | ID: mdl-37480692

RESUMEN

The growing presence of yttrium (Y) in the environment raises concern regarding its safety and toxicity. However, limited toxicological data are available to determine cardiotoxicity of Y and its underlying mechanisms. In the present study, yttrium chloride (YCl3) intervention with different doses was performed in male Kunming mice for the toxicological evaluation of Y in the heart. After 28 days of intragastric administration, 500 mg/kg·bw YCl3 induces iron accumulation in cardiomyocytes, and triggers ferroptosis through the glutathione peroxidase 4 (GPX4)/glutathione (GSH)/system Xc- axis via the inhibition of Nrf2 signaling pathway. This process led to cardiac lipid peroxidation and inflammatory response. Further RNA sequencing transcriptome analysis found that many genes involved in ferroptosis and lipid metabolism-related pathways were enriched. The ferroptosis induced by YCl3 in cardiomyocytes ultimately caused cardiac injury and dysfunction in mice. Our findings assist in the elucidation of the potential subacute cardiotoxicity of Y3+ and its underlying mechanisms.


Asunto(s)
Ferroptosis , Miocitos Cardíacos , Masculino , Ratones , Animales , Peroxidación de Lípido , Cardiotoxicidad , Itrio , Inflamación , Hierro
8.
J Nanobiotechnology ; 21(1): 182, 2023 Jun 07.
Artículo en Inglés | MEDLINE | ID: mdl-37280622

RESUMEN

Due to its complicated pathophysiology, propensity for metastasis, and poor prognosis, colon cancer is challenging to treat and must be managed with a combination of therapy. Using rolling circle transcription (RCT), this work created a nanosponge therapeutic medication system (AS1411@antimiR-21@Dox). Using the AS1411 aptamer, this approach accomplished targeted delivery to cancer cells. Furthermore, analysis of cell viability, cell apoptosis, cell cycle arrest, reactive oxygen species (ROS) content, and mitochondrial membrane potential (MMP) levels revealed that functional nucleic acid nanosponge drug (FND) can kill cancer cells. Moreover, transcriptomics uncovered a putative mechanism for the FND anti-tumor effect. These pathways, which included mitotic metaphase and anaphase as well as the SMAC-mediated dissociation of the IAP: caspase complexes, were principally linked to the cell cycle and cell death. In conclusion, by triggering cell cycle arrest and apoptosis, the nano-synergistic therapeutic system allowed for the intelligent and effective targeted administration of RNA and chemotherapeutic medicines for colon cancer treatment. The system allowed for payload efficiency while being customizable, targeted, reliable, stable, and affordable.


Asunto(s)
Aptámeros de Nucleótidos , Neoplasias del Colon , Nanopartículas , Ácidos Nucleicos , Humanos , Doxorrubicina/uso terapéutico , Sistemas de Liberación de Medicamentos , Ácidos Nucleicos/uso terapéutico , Neoplasias del Colon/tratamiento farmacológico , Neoplasias del Colon/metabolismo , Portadores de Fármacos/uso terapéutico , Aptámeros de Nucleótidos/uso terapéutico , Oligodesoxirribonucleótidos , Nanopartículas/uso terapéutico , Línea Celular Tumoral
9.
Small ; 19(25): e2207752, 2023 06.
Artículo en Inglés | MEDLINE | ID: mdl-36929582

RESUMEN

Over the past decade, stem cell- and tumor-derived organoids are the most promising models in developmental biology and disease modeling, respectively. The matrix is one of three main elements in the construction of an organoid and the most important module of its extracellular microenvironment. However, the source of the currently available commercial matrix, Matrigel, limits the application of organoids in clinical medicine. It is worth investigating whether the original decellularized extracellular matrix (dECM) can be exploited as the matrix of organoids and improving organoid construction are very important. In this review, tissue decellularization protocols and the characteristics of decellularization methods, the mechanical support and biological cues of extraccellular matrix (ECM), methods for construction of multifunctional dECM and responsive dECM hydrogel, and the potential applications of functional dECM are summarized. In addition, some expectations are provided for dECM as the matrix of organoids in clinical applications.


Asunto(s)
Matriz Extracelular Descelularizada , Matriz Extracelular , Ingeniería de Tejidos/métodos , Organoides , Bioingeniería , Andamios del Tejido
10.
JPEN J Parenter Enteral Nutr ; 47(1): 151-158, 2023 01.
Artículo en Inglés | MEDLINE | ID: mdl-35975334

RESUMEN

BACKGROUND: The prevalence of malnutrition is unknown in patients with Hirschsprung disease. Undernutrition is associated with poor clinical outcomes. This study aims to describe the nutrition status among patients with Hirschsprung disease at admission. METHODS: We retrospectively used data from children with Hirschsprung disease admitted to three pediatric surgery centers in China from January 2016 to December 2020. The weight-for-age z scores (WAZ), height-for-age z scores (HAZ), and body mass index-for-age z scores (BAZ) were calculated as the reference for nutrition risk according to the World Health Organization child growth standards. The nutrition status of enrolled children was described and nutrition risk in each clinical characteristic was compared. The association between nutrition status and clinical outcomes was analyzed using univariate and multivariate logistic regression. RESULTS: A total of 624 patients were included in this study. The mean WAZ, HAZ, and BAZ of all patients was -0.64 ± 1.40, -0.45 ± 1.78, and -0.43 ± 1.50, respectively. Moderate to severe overall undernutrition was 16.3% (102/624). We found that WAZ and BAZ were significantly reduced with the length of aganglionic segments (P = 0.001). Children who had a definitive surgery at 3 years of age or older had significantly lower HAZ (P = 0.001). A multivariate regression model assessing postoperative Hirschsprung-associated enterocolitis showed that the WAZ was one of the independent risk factors (P = 0.001). CONCLUSION: Undernutrition is prevalent among children with Hirschsprung disease. Nutrition assessment to identify individuals at risk of undernutrition for further intervention is necessary.


Asunto(s)
Enfermedad de Hirschsprung , Desnutrición , Humanos , Niño , Lactante , Estudios Transversales , Enfermedad de Hirschsprung/complicaciones , Enfermedad de Hirschsprung/cirugía , Estudios Retrospectivos , Desnutrición/diagnóstico , Desnutrición/epidemiología , Desnutrición/etiología , Estado Nutricional
11.
Materials (Basel) ; 15(13)2022 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-35806759

RESUMEN

Reducing the loose-layer-to-dense-layer ratio in PEO coatings on aluminum and its alloys is the key to improving their corrosion resistance and expanding their applications in the aerospace industry and other fields. In this paper, we describe the discharge evolution during the PEO process in exhaustive detail and report the appearance of a novel "chain-like" discharge for the first time. We investigated the microstructure and composition of PEO coatings using a scanning electron microscope (SEM) equipped with an energy-dispersive spectrometer (EDS) and an X-ray diffractometer (XRD). The results reflected that the coating composition changed from amorphous Al2O3 to crystalline γ-Al2O3 and α-Al2O3 phases with the evolution of the plasma spark discharge state. We evaluated the electrochemical behavior of the coatings using a potentiodynamic polarization curve and electrochemical impedance spectroscopy (EIS) in 3.5 wt.% NaCl solution. Under "chain-like" discharge, the icorr of the coating on Al was 8.564 × 10-9 A∙cm-2, which was five orders of magnitude lower than that of the sample without the PEO coating. Moreover, we evaluated the adhesion strength of the coatings at different stages using a pull-off test. The adhesion strength of the PEO coatings at stage V reached 70 MPa. Furthermore, the high content of α-Al2O3 increased the hardness of the coating to 2000 HV. Therefore, the "chain-like" discharge promoted the formation of a single dense layer with 2.8% porosity and that demonstrated excellent properties. We also propose a mechanism to explain the influence of the plasma spark discharge state on the microstructure and composition of the PEO coatings.

12.
Expert Opin Drug Deliv ; 19(4): 435-450, 2022 04.
Artículo en Inglés | MEDLINE | ID: mdl-35387533

RESUMEN

INTRODUCTION: miRNA-derivative clinical nucleotide drugs (mdCNDs) effectively treat several diseases, with numerous undergoing clinical trials. In early-stage trials in disease therapeutics, such as malignant pleural mesothelioma and hepatic virus C infection, mdCND's therapeutic potency is undeniably good for effectiveness and safety. AREAS COVERED: Fifteen mdCNDs undergoing clinical trials are introduced in this review. MiRNA modifications methods have been summarized, including phosphorothioate, cholesterol, locked nucleic acid, 2'-O-methyl, N,N-diethyl-4-(4-nitronaphthalen1-ylazo)-phenylamine modifications, and many more. Moreover, delivery systems, including self-assembled, inorganic ions nanoparticles, exosomes, and lipid-based nanosystems for mdCNDs targeted delivery, are presented. Among that, EnGeneIC, N-Acetylgalactosamine, liposomal nanoparticles, and cholesterol-conjugated for mdCNDs delivery are currently undergoing clinical trials. The pH, light, temperature, redox-responsive, enzyme, and specific-substance modes to trigger the release of miRNAs to target sites on-demand and the prospects of mdCNDs are discussed in this review. EXPERT OPINION: mdNCDs are one type of promising clinical drugs, however, it is still in the infancy. During the development process, it is imperative to advance in modifying miRNAs, especially at the 5'-end, to enhance targetability and stability against nucleases, develop a stimuli-responsive mode to control the release of mdCNDs to tissue cell-type-specific sites.


Asunto(s)
MicroARNs , Nanopartículas , Portadores de Fármacos , Sistemas de Liberación de Medicamentos , MicroARNs/genética , Nanopartículas/química , Nucleótidos
13.
Biosens Bioelectron ; 200: 113902, 2022 Mar 15.
Artículo en Inglés | MEDLINE | ID: mdl-34954570

RESUMEN

Exosomes are regarded as a promising biomarker for the noninvasive diagnosis and treatment of diseases. The value of exosomes for medical research has promoted the search for a fast, efficient, and sensitive detection method. This study reported a sandwich-based evanescent wave fluorescent biosensor (S-EWFB) for exosome detection. A two-step strategy was implemented to take advantages of the simple binding of fluorescent probes with exosomes via the hydrophobic interaction between the cholesteryl and phospholipid bilayer membrane, as well as real-time detection on an evanescent wave liquid-solid interface based on CD63 aptamer-specific capture to form an exosome@fluorescence probe/aptamer sandwich structure. The one-to-many connection between exosomes and signal molecules and the aptamer-modified evanescent wave optical fiber detection platform reduced the detection limit of exosomes to 7.66 particles/mL, with a linear range of 47.5-4.75 × 106 particles/mL. The entire detection process was simple, rapid, and real-time and lasted about 1 h while requiring no separation and purification. Additionally, this platform showed excellent surface regeneration capability and exhibited good performance during the analysis of tumor and non-tumor-derived exosomes.


Asunto(s)
Aptámeros de Nucleótidos , Técnicas Biosensibles , Exosomas , Colorantes Fluorescentes , Oligonucleótidos , Fibras Ópticas
14.
Nat Commun ; 12(1): 4997, 2021 08 17.
Artículo en Inglés | MEDLINE | ID: mdl-34404774

RESUMEN

Epicardial formation is necessary for normal myocardial morphogenesis. Here, we show that differentiating hiPSC-derived lateral plate mesoderm with BMP4, RA and VEGF (BVR) can generate a premature form of epicardial cells (termed pre-epicardial cells, PECs) expressing WT1, TBX18, SEMA3D, and SCX within 7 days. BVR stimulation after Wnt inhibition of LPM demonstrates co-differentiation and spatial organization of PECs and cardiomyocytes (CMs) in a single 2D culture. Co-culture consolidates CMs into dense aggregates, which then form a connected beating syncytium with enhanced contractility and calcium handling; while PECs become more mature with significant upregulation of UPK1B, ITGA4, and ALDH1A2 expressions. Our study also demonstrates that PECs secrete IGF2 and stimulate CM proliferation in co-culture. Three-dimensional PEC-CM spheroid co-cultures form outer smooth muscle cell layers on cardiac micro-tissues with organized internal luminal structures. These characteristics suggest PECs could play a key role in enhancing tissue organization within engineered cardiac constructs in vitro.


Asunto(s)
Agregación Celular/fisiología , Técnicas de Cocultivo , Miocitos Cardíacos/fisiología , Familia de Aldehído Deshidrogenasa 1/metabolismo , Factores de Transcripción con Motivo Hélice-Asa-Hélice Básico , Proteína Morfogenética Ósea 4 , Calcio/metabolismo , Diferenciación Celular , Genes del Tumor de Wilms , Humanos , Células Madre Pluripotentes Inducidas , Factor II del Crecimiento Similar a la Insulina/metabolismo , Mesodermo , Miocitos del Músculo Liso , Retinal-Deshidrogenasa/metabolismo , Semaforinas , Células Madre , Proteínas de Dominio T Box/metabolismo
15.
Cancer Med ; 10(17): 6010-6021, 2021 09.
Artículo en Inglés | MEDLINE | ID: mdl-34268882

RESUMEN

Invasion and metastasis are the main causes of colorectal cancer (CRC)-related death. Accumulating evidence suggested that sphingosine kinase 1 (SphK1) promoted the metastasis of CRC and autophagy played an important role in SphK1 promoting the metastasis of malignancy. However, the mechanism by which SphK1-driven autophagy promotes invasion and metastasis in CRC remains to be clarified. In the present study, immunohistochemical detection showed the expression of SphK1 and paxillin was higher in human CRC tissues than those of normal colorectal mucosal tissues, they were both associated with TNM staging, lymphatic, and distance metastasis. In addition, study of in situ tumor transplantation model in nude mice showed that the suppression of SphK1 inhibited the growth of colonic orthotopic implantation tumors and the expression of paxillin, p-paxillin, LC3 in the tumor. So, SphK1 may promote CRC metastasis via inducing the expression of paxillin expression and its phosphorylation, in vivo. Furthermore, results of CCK8 assay, transwell and wound healing assays showed that SphK1 promoted the viability, invasion, and metastasis of CRC cells. Transmission electron microscopy detection showed that SphK1 is the key factor in autophagy induction in CRC cells. Moreover, western blot examination indicated that the expression of LC3Ⅱ/Ⅰ, paxillin, p-paxillin, MMP-2, and vimentin was enhanced in SphK1-overexpressed CRC cells and suppressed in SphK1 knockdown CRC cells, meanwhile, the expression of E-cadherin was suppressed in SphK1-overexpressed CRC cells and enhanced in SphK1 knockdown CRC cells. Suppression of autophagy by 3MA reversed the expression of paxillin and its phosphorylation in SphK1-overexpressed CRC cells, indicated that SphK1-driven autophagy induced the expression of paxillin and its phosphorylation in CRC cells. Together, these findings reveal that SphK1-driven autophagy may promote the invasion and metastasis of CRC via promoting the expression of focal adhesion paxillin and its phosphorylation.


Asunto(s)
Autofagia/genética , Adhesiones Focales/metabolismo , Fosfotransferasas (Aceptor de Grupo Alcohol)/metabolismo , Adulto , Anciano , Anciano de 80 o más Años , Animales , Neoplasias Colorrectales/genética , Femenino , Humanos , Masculino , Ratones , Ratones Desnudos , Persona de Mediana Edad , Metástasis de la Neoplasia
16.
Front Oncol ; 11: 632540, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33937033

RESUMEN

Adoptive natural killer (NK) cell transfer has been demonstrated to be a promising immunotherapy approach against malignancies, but requires the administration of sufficient activated cells for treatment effectiveness. However, the paucity of clinical-grade to support the for large-scale cell expansion limits its feasibility. Here we developed a feeder-based NK cell expansion approach that utilizes OX40L armed NK-92 cell with secreting neoleukin-2/15 (Neo-2/15), a hyper-stable mimetic with a high affinity to IL-2Rßγ. The novel feeder cells (NK92-Neo2/15-OX40L) induced the expansion of NK cells with a 2180-fold expansion (median; 5 donors; range, 1767 to 2719) after 21 days of co-culture without added cytokines. These cells were highly cytotoxic against Raji cells and against several solid tumors in vivo. Mechanistically, NK92-Neo2/15-OX40L induced OX40 and OX40L expression on expanded NK cells and promoted the OX40-OX40L positive feedback loop, thus boosting NK cell function. Our data provided a novel NK cell expansion mechanism and insights into OX40-OX40L axis regulation of NK cell expansion.

17.
Cell Biol Toxicol ; 36(6): 603-608, 2020 12.
Artículo en Inglés | MEDLINE | ID: mdl-32607778

RESUMEN

Aflatoxin B1 (AFB1) is widely distributed in nature and is confirmed to be the most toxic of all the aflatoxins, whose predominant metabolism site is the liver. As a well-studied and vital mode of epigenetic modifications, aberrant methylation of the promoters in eukaryotic cells may cause the silence of essential genes, affecting their related transcriptional pathways and ultimately leading to the development of disease and cancers. This study investigated the mechanisms of AFB1-induced hepatotoxicity in S phase-arrested L02 cells using single-cell RNA-seq and single-cell reduced representation bisulfite sequencing (RRBS). AFB1 induced apoptosis and cell cycle S phase arrest, reduced mitochondrial membrane potential (ΔΨm), and increased reactive oxygen species (ROS) generation, as well as the DNA methylation level. Hepatotoxicity mechanism patterns induced by AFB1 in S phase-arrested L02 cells were revealed by combining single-cell RNA-seq with single-cell RRBS analysis, in which DNA methylation played a role via regulating the gonadotropin-releasing hormone receptor pathway, the Wnt signaling pathway, and the TGF-beta signaling pathway. Moreover, a novel strategy for precision toxicology exploration was obtained, including the selection of target cells, multi-group non-directional sequencing, and pathway analysis.


Asunto(s)
Aflatoxina B1/toxicidad , Metilación de ADN/efectos de los fármacos , Perfilación de la Expresión Génica , Hepatocitos/efectos de los fármacos , RNA-Seq , Puntos de Control de la Fase S del Ciclo Celular/efectos de los fármacos , Análisis de la Célula Individual , Transcriptoma/efectos de los fármacos , Apoptosis/efectos de los fármacos , Línea Celular , Redes Reguladoras de Genes/efectos de los fármacos , Hepatocitos/metabolismo , Hepatocitos/patología , Humanos , Potencial de la Membrana Mitocondrial/efectos de los fármacos , Mitocondrias Hepáticas/efectos de los fármacos , Mitocondrias Hepáticas/genética , Mitocondrias Hepáticas/metabolismo , Mitocondrias Hepáticas/patología , Estrés Oxidativo/efectos de los fármacos , Especies Reactivas de Oxígeno/metabolismo
18.
Anal Bioanal Chem ; 412(19): 4477-4482, 2020 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-32488386

RESUMEN

In this work, a duplex-specific nuclease (DSN)-resistant triplex-helix DNA nanoswitch was designed for assays of single-base differentiation of the let-7a family in lung cancer cells. Initially, although a 10-bp duplex stem in the nanoswitch was cleaved to pieces, a 10-bp triplex stem was resistant to DSN. Consequently, a triple-stranded DNA structure resistant to DSN was obtained. The pH-dependent formation of the triplex structure then produced the pH-related nanoswitch/miRNA hybrid, and the metastable nanoswitch generated an obvious signal increase at pH 6.8. Surprisingly, the pH condition at 6.8 for the best nanoswitch/miRNA hybrid is consistent with the optimal DSN catalysis, which paves the way for a first-rank DSN signal amplification (DSNSA) strategy for the single-base selective capacity of the homologous let-7a family with a limit of detection of 0.26 pM. The cyclic strategy based on the DSN-mediated triplex-helix DNA nanoswitch was verified in lung cancer cell samples and exhibited better discriminatory ability without user-unfriendly nucleotide modification or extra probe-mediated assistance, showing excellent potential for application in biomedical sensing and clinical diagnosis. Graphical abstract Based on the discovery that a triple-helix DNA nanoswitch is resistant to DSN and that the nanoswitch/miRNA hybridization was pH-related, pH at 6.8, which is suitable for the optimal nanoswitch/miRNA hybrid and DSN catalysis, reinforced the DSNSA strategy for the single-base selective capacity of the homologous let-7a family with a limit of detection of 0.26 pM.


Asunto(s)
ADN/química , Neoplasias Pulmonares/genética , MicroARNs/análisis , Células A549 , Técnicas Biosensibles/métodos , Línea Celular , Humanos , Límite de Detección , MicroARNs/genética , Nanoestructuras/química , Conformación de Ácido Nucleico , Hibridación de Ácido Nucleico
19.
Ecotoxicol Environ Saf ; 198: 110596, 2020 Jul 15.
Artículo en Inglés | MEDLINE | ID: mdl-32353602

RESUMEN

Aflatoxin B1 (AFB1) is a known carcinogen found in contaminated food and designated by the World Health Organization as a class I carcinogenic substance. AFB1 presents with carcinogenicity, teratogenicity, and mutagenicity, and the liver is the human organ most susceptible to AFB1. Zinc (Zn), which is one of the essential nutrient elements that could protect the cells from biological toxins, heavy metals, hydrogen peroxide, metal chelators and radiation, is assessed in this study for its potential to alleviate AFB1-induced cytotoxicity. Samples were divided into three groups, namely CK, AFB1, and AFB1+Zn. Protein expressions were analyzed by two-way electrophoresis combined with flight mass spectrometry, with 41 differentially expressed proteins identified in the results, mainly related to oxidative stress, cell apoptosis, DNA damage, and energy metabolism. Zn was found to regulate the expression of peroxidases (peroxiredoxin-1, peroxiredoxin-5, peroxiredoxin-6) to relieve AFB1-induced oxidative stress. Moreover, Zn could decrease the expression of pro-apoptotic genes (cleaved-caspase-3, caspase-9, and Bax) and increase the expression of anti-apoptotic genes (Bcl-2 and Bcl-xl) to alleviate the cell apoptosis induced by AFB1. In addition, AFB1 reduced intracellular ATP levels, whereas Zn supplementation boosted ATP levels and maintained homeostasis and a steady state of cellular energy metabolism by modulating AMPK-ACC phosphorylation levels, while many zinc finger proteins changed after AFB1 treatment. These results, therefore, indicate that Zn could alleviate AFB1-induced cytotoxicity by changing the expressions of zinc finger proteins in liver hepatocellular carcinoma (HepG2 cells).


Asunto(s)
Aflatoxina B1/toxicidad , Apoptosis/efectos de los fármacos , Regulación de la Expresión Génica/efectos de los fármacos , Estrés Oxidativo/efectos de los fármacos , Zinc/farmacología , Caspasa 3/genética , Caspasa 9/genética , Daño del ADN/efectos de los fármacos , Células Hep G2 , Humanos , Sustancias Protectoras/farmacología , Proteómica , Proteínas Proto-Oncogénicas c-bcl-2/genética , Proteína X Asociada a bcl-2/genética
20.
Med Sci Monit ; 25: 6836-6845, 2019 Sep 11.
Artículo en Inglés | MEDLINE | ID: mdl-31509521

RESUMEN

BACKGROUND Ginkgo biloba extract (EGb761), a standard extract of the Chinese traditional medicine Ginkgo biloba, plays an anti-tumor role in various cancers. However, whether EGb761 is involved in the invasion and metastasis of gastric cancer remains unclear. MATERIAL AND METHODS In the current study, cell viability assay, Western blotting, wound-healing assay, Transwell invasion assay, and orthotopic transplantation model were performed to explore the effects of EGb761 on gastric cancer. RESULTS In vitro, the results showed that EGb761 suppressed the proliferation of gastric cancer cells in a dose-dependent manner. Furthermore, the migration and invasiveness were weakened and the protein levels of p-ERK1/2, NF-kappaB P65, NF-kappaB p-P65, and MMP2 were decreased by EGb761 or U0126 (an inhibitor of ERK signaling pathway) exposure in gastric cancer cells. Moreover, the combined treatment with EGb761 and U0126 significantly inhibited ERK, NF-kappaB signaling pathway, and the expression of MMP2 than those of single drug. In vivo, EGb761 inhibited the tumor growth and hepatic metastasis of gastric cancer in the mouse model. Results of immunohistochemistry indicated that the expression of ERK1/2, NF-kappaB P65 and MMP2 were decreased by EGb761 in the tumor tissues. CONCLUSIONS EGb761 plays a vital role in the suppression of metastasis and ERK/NF-kappaB signaling pathway in gastric cancer.


Asunto(s)
Quinasas MAP Reguladas por Señal Extracelular/metabolismo , FN-kappa B/metabolismo , Extractos Vegetales/uso terapéutico , Transducción de Señal , Neoplasias Gástricas/tratamiento farmacológico , Neoplasias Gástricas/patología , Animales , Butadienos/farmacología , Línea Celular Tumoral , Movimiento Celular/efectos de los fármacos , Proliferación Celular/efectos de los fármacos , Ginkgo biloba , Humanos , Sistema de Señalización de MAP Quinasas/efectos de los fármacos , Metaloproteinasa 2 de la Matriz/metabolismo , Ratones Desnudos , Invasividad Neoplásica , Metástasis de la Neoplasia , Nitrilos/farmacología , Fosforilación/efectos de los fármacos , Transducción de Señal/efectos de los fármacos
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