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1.
Angew Chem Int Ed Engl ; 63(20): e202402911, 2024 May 13.
Artigo em Inglês | MEDLINE | ID: mdl-38511343

RESUMO

Memristors are essential components of neuromorphic systems that mimic the synaptic plasticity observed in biological neurons. In this study, a novel approach employing one-dimensional covalent organic framework (1D COF) films was explored to enhance the performance of memristors. The unique structural and electronic properties of two 1D COF films (COF-4,4'-methylenedianiline (MDA) and COF-4,4'-oxydianiline (ODA)) offer advantages for multilevel resistive switching, which is a key feature in neuromorphic computing applications. By further introducing a TiO2 layer on the COF-ODA film, a built-in electric field between the COF-TiO2 interfaces could be generated, demonstrating the feasibility of utilizing COFs as a platform for constructing memristors with tunable resistive states. The 1D nanochannels of these COF structures contributed to the efficient modulation of electrical conductance, enabling precise control over synaptic weights in neuromorphic circuits. This study also investigated the potential of these COF-based memristors to achieve energy-efficient and high-density memory devices.

2.
J Proteomics ; 296: 105113, 2024 03 30.
Artigo em Inglês | MEDLINE | ID: mdl-38346667

RESUMO

This study aimed to investigate the different regulatory mechanisms of euryhaline fish under regular hyperosmotic and extreme hyperosmotic stress. The OmB (Oreochromis mossambicus brain) cells were exposed to three treatments: control, regular hyperosmotic stress and extreme hyperosmotic stress. After 12 h exposure, proteomics, metabolomics analyses and integrative analyses were explored. Both kinds of stress lead to lowering cell growth and morphology changes, while under regular hyperosmotic stress, the up-regulated processes related with compatible organic osmolytes synthesis are crucial strategy for the euryhaline fish cell line to survive; On the other hand, under extreme hyperosmotic stress, the processes related with cell apoptosis and cell cycle arrest are dominant. Furthermore, down-regulated pyrimidine metabolism and several ribosomal proteins partially participated in the lowered cell metabolism and increased cell death under both kinds of hyperosmotic stress. The PI3K-Akt and p53 signaling pathways were involved in the stagnant stage of cell cycles and induction of cell apoptosis under both kinds of hyperosmotic stress. However, HIF-1, FoxO, JAK-STAT and Hippo signaling pathways mainly contribute to disrupting the cell cycle, metabolism and induction of cell apoptosis under extreme hyperosmotic stress. SIGNIFICANCE: In the past, the research on fish osmoregulation mainly focused on the transcription factors and ion transporters of osmoregulation, the processes between osmotic sensing and signal transduction, and the associations between signaling pathways and regulation processes have been poorly understood. Investigating fish cell osmoregulation and potential signal transduction pathways is necessary. With the advancements in omics research, it is now feasible to investigate the relationship between environmental stress and molecular responses. In this study, we aimed to explore the signaling pathways and substance metabolism mode during hyper-osmoregulation in OmB cell line, to reveal the key factors that are critical to cell osmoregulation.


Assuntos
Osmorregulação , Tilápia , Animais , Tilápia/metabolismo , Proteômica , Fosfatidilinositol 3-Quinases/metabolismo , Adaptação Psicológica
3.
Am J Physiol Cell Physiol ; 326(4): C1054-C1066, 2024 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-38344798

RESUMO

To understand the role of myo-inositol oxygenase (miox) in the osmotic regulation of Nile tilapia, its expression was analyzed in various tissues. The results showed that the expression of miox gene was highest in the kidney, followed by the liver, and was significantly upregulated in the kidney and liver under 1 h hyperosmotic stress. The relative luminescence efficiency of the miox gene transcription starting site (-4,617 to +312 bp) under hyperosmotic stress was measured. Two fragments (-1,640/-1,619 and -620/-599) could induce the luminescence activity. Moreover, the -1,640/-1,619 and -620/-599 responded to hyperosmotic stress and high-glucose stimulation by base mutation, suggesting that osmotic and carbohydrate response elements may exist in this region. Finally, the salinity tolerance of Nile tilapia was significantly reduced after the knocking down of miox gene. The accumulation of myo-inositol was affected, and the expression of enzymes in glucose metabolism was significantly reduced after the miox gene was knocked down. Furthermore, hyperosmotic stress can cause oxidative stress, and MIOX may help maintain the cell redox balance under hyperosmotic stress. In summary, MIOX is essential in osmotic regulation to enhance the salinity tolerance of Nile tilapia by affecting myo-inositol accumulation, glucose metabolism, and antioxidant performance.NEW & NOTEWORTHY Myo-inositol oxygenase (MIOX) is the rate-limiting enzyme that catalyzes the first step of MI metabolism and determines MI content in aquatic animals. To understand the role of miox in the osmotic regulation of Nile tilapia, we analyzed its expression in different tissues and its function under hyperosmotic stress. This study showed that miox is essential in osmotic regulation to enhance the salinity tolerance of Nile tilapia by affecting myo-inositol accumulation, glucose metabolism, and antioxidant performance.


Assuntos
Ciclídeos , Animais , Ciclídeos/genética , Ciclídeos/metabolismo , Inositol Oxigenase/genética , Inositol Oxigenase/metabolismo , Antioxidantes , Inositol/metabolismo , Glucose/metabolismo
4.
Antioxidants (Basel) ; 12(12)2023 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-38136238

RESUMO

Ferroptosis is involved in various tissue injuries including neurodegeneration, ischemia-reperfusion injury, and acute liver injury. Ferroptosis inhibitors exhibit promising clinical potential in the treatment of various diseases. As a traditional chemical, silymarin has been widely used in healthcare and clinical applications to treat liver injuries in which ferroptosis is involved. Silibinin is the main active ingredient of silymarin. However, the effect of silibinin on ferroptosis and ferroptosis-related diseases remains unclear. Here, we found that silibinin inhibited death in different kinds of cells caused by ferroptosis inducers including RSL3 and erastin. Moreover, silibinin alleviated lipid peroxidation induced by RSL3 without affecting the labile iron pool. Next, the antioxidant activity of silibinin was demonstrated by the DPPH assay. In vivo, silibinin strikingly relieved tissue injuries and ferroptosis in the liver and kidney of glutathione peroxidase 4 (GPX4) knockout C57 BL/6J mice. Moreover, silibinin effectively rescued renal ischemia-reperfusion, a well-known ferroptosis-related disease. In conclusion, our study revealed that silibinin effectively inhibits cell ferroptosis and ferroptosis-related tissue injuries, implicating silibinin as a potential chemical to treat ferroptosis-related diseases.

5.
Commun Biol ; 6(1): 1169, 2023 11 16.
Artigo em Inglês | MEDLINE | ID: mdl-37973823

RESUMO

Durotaxis and negative durotaxis are processes in which cell migration is directed by extracellular stiffness. Durotaxis is the tendency of cells to migrate toward stiffer areas, while negative durotaxis occurs when cells migrate toward regions with lower stiffness. The mechanisms of both processes are not yet fully understood. Additionally, the connection between durotaxis and negative durotaxis remains unclear. In this review, we compare the mechanisms underlying durotaxis and negative durotaxis, summarize the basic principles of both, discuss the possible reasons why some cell types exhibit durotaxis while others exhibit negative durotaxis, propose mechanisms of switching between these processes, and emphasize the challenges in the investigation of durotaxis and negative durotaxis.


Assuntos
Fenômenos Biomecânicos , Movimento Celular
7.
Chin Herb Med ; 15(2): 263-270, 2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-37265757

RESUMO

Objective: The compatibility of Eucommia ulmoides (Eu) and Psoralea corylifolia (Pc) on the pharmacokinetic (PK) properties in the rat was explored in this study. Methods: Eu extract, Pc extract and the combined extracts (crude drug ratio was 2:1) was administered by gavage, respectively. Two PK experiments were conducted. In first one, the blood samples were collected via the occuli chorioideae vein to get the PK properties of the components. In second one, the blood samples were simultaneously collected via the internal jugular vein or portal vein at different time points and the concentrations of target ingredients were detected by LC/MS/MS to clear the location where the interaction of Eu and Pc took place in vivo. Results: Eight of 11 ingredients in Eu and Pc extract were determined in rat plasma. The exposure levels of geniposidic acid (GPA), aucubin (AU), geniposide (GP), pinoresinol diglucoside (PDG), psoralen glycosides (PLG) and isopsoralen glycosides (IPLG) were decreased 1/5-2/3 after administration of combined extracts. Comparing to the combined administration, the exposure of GPA and AU in plasma of single Eu administration collected via the portal vein were decreased 1/3-2/3, and the values of AUC0-24h and AUC0-∞ of GP collected from the portal vein or internal jugular vein were double increased. The other components' parameters were not significantly changed. Conclusion: In summary, the Pc and Eu combined administration could affect the exposure of the main components of Eu extract in rats due to the changed intestinal absorption. The research on the compatibility of Pc and Eu was helpful to guide the clinical administration of Eu and Pc simultaneously.

8.
Plant Dis ; 107(8): 2500-2505, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-36691281

RESUMO

A Pantoea ananatis strain, named LCFJ-001 (GDMCC: 1.6101), was isolated for the first time from bacterial wilt-diseased roots of mulberry (Morus atropurpurea) in the western part of the Guangxi Zhuang Autonomous Region, China. Moreover, through Koch's postulates, it was proven that LCFJ-001 can cause mulberry wilt, which is one of the pathogens of mulberry bacterial wilt. Here, we report a complete, annotated genome sequence of P. ananatis LCFJ-001. The entire genome sequence of P. ananatis strain LCFJ-001 was a 4,499,350 bp circular chromosome with 53.50% GC content. In total, 3,521 genes were annotated, of which 3,418 were assigned protein-coding genes. In addition, 22 ribosomal RNAs and 81 transfer RNAs were identified. The presented resource will help explore the pathogenetic mechanisms of mulberry wilt disease caused by the genus Pantoea.


Assuntos
Morus , Pantoea , Genoma Bacteriano , Pantoea/genética , Morus/microbiologia , China
9.
Ecotoxicol Environ Saf ; 249: 114399, 2023 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-36508784

RESUMO

The similar nervous system structure between crustaceans and insects and the high-water solubility of thiamethoxam can lead to the more severe toxicity of thiamethoxam to crustaceans. However, the effects of thiamethoxam on crustaceans are unclear. Therefore, a 96-h acute toxicity test was performed to explore the hepatotoxicity and neurotoxicity effects of thiamethoxam on Chinese mitten crab (Eriocheir sinensis) at concentrations 0 µg/L, 150 µg/L and 300 µg/L. The antioxidant and detoxification systems (including phases I and II) were significantly activated after exposure of juvenile crabs to thiamethoxam for 24 h in 300 µg/L group, whereas the toxic activation effect in 150 µg/L group was delayed. Moreover, a similar pattern was observed for the transcription levels of immune-related genes. Further analysis of inflammatory signaling pathway-related genes showed that thiamethoxam exposure with 300 µg/L for 24 h may induce a pro-inflammatory response through the NF-κB pathway. In contrast, the gene expression levels in 150 µg/L group were significantly upregulated compared with 0 µg/L group after 96 h. In addition, although the acute exposure of 150 µg/L thiamethoxam did not seem to induce significant neurotoxicity, the acetylcholinesterase activity was significantly decreased in 300 µg/L group after thiamethoxam exposure for 96 h. Correspondingly, thiamethoxam exposure with 300 µg/L for 24 h resulted in significantly downregulated transcriptional levels of synaptic transmission-related genes (e.g. dopamine-, gamma-aminobutyric acid- and serotonin-related receptors). Therefore, thiamethoxam may be harmful and cause potential toxic threats such as neurotoxicity and metabolic damage to crustaceans.


Assuntos
Braquiúros , Doença Hepática Induzida por Substâncias e Drogas , Animais , Tiametoxam , Acetilcolinesterase , Antioxidantes , Dopamina
10.
Chemosphere ; 312(Pt 1): 137253, 2023 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-36395896

RESUMO

Photocatalytic disinfection is considered a promising method for eliminating the hazards of pathogenic bacteria. Graphitic carbon nitride (g-C3N4) is an ideal photocatalytic bacterial inactivation material for its advantage of tunable band structure, good stability and easy preparation. This work has constructed a novel defective 3D porous g-C3N4 by cyanamide carbonation using dendritic mesoporous silica template. The direct loading of Fe3O4 nanoparticles provided an excellent pg-C3N4-Fe3O4 photocatalyst suitable for water disinfection. Compared to pristine g-C3N4, the prepared 3D porous defective g-C3N4-Fe3O4 exhibited the enhanced visible light absorbance as indicated by the band gap decreasing of 0.66 eV, and about 3 and 10 fold increase of photo-induced current response and O2 adsorption respectively. The pg-C3N4-Fe3O4 showed excellent visible-light-driven photocatalytic bactericidal activity. It could kill 1 × 107 cfu mL-1Escherichia coli completely within 1 h under visible-light illumination (100 mW cm-2) with good reusability, its logarithmic bacterial inactivation efficiency was about 2.5 fold higher than pg-C3N4. The enhanced bactericidal performance is mainly ascribed to the Fe3O4 involved cascade photo-Fenton reaction.


Assuntos
Desinfecção , Luz , Porosidade , Catálise , Desinfecção/métodos , Bactérias , Escherichia coli
11.
Front Immunol ; 14: 1266667, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-38283340

RESUMO

Intestinal tuft cells (TCs) are defined as chemosensory cells that can "taste" danger and induce immune responses. They play a critical role in gastrointestinal parasite invasion, inflammatory bowel diseases and high-fat diet-induced obesity. Intestinal IL-25, the unique product of TCs, is a key activator of type 2 immunity, especially to promote group 2 innate lymphoid cells (ILC2s) to secret IL-13. Then the IL-13 mainly promotes intestinal stem cell (ISCs) proliferation into TCs and goblet cells. This pathway formulates the circuit in the intestine. This paper focuses on the potential role of the intestinal TC, ILC2 and their circuit in obesity-induced intestinal damage, and discussion on further study and the potential therapeutic target in obesity.


Assuntos
Imunidade Inata , Interleucina-13 , Humanos , Interleucina-13/metabolismo , Células em Tufo , Linfócitos , Intestinos , Obesidade/metabolismo
12.
Cells ; 11(22)2022 11 09.
Artigo em Inglês | MEDLINE | ID: mdl-36428972

RESUMO

Directed cell migration towards a softer environment is called negative durotaxis. The mechanism and pathological relevance of negative durotaxis in tumor progression still requires in-depth investigation. Here, we report that YAP promotes the negative durotaxis of melanoma. We uncovered that the RhoA-myosin II pathway may underlie the YAP enhanced negative durotaxis of melanoma cells. Acral melanoma is the most common subtype of melanoma in non-Caucasians and tends to develop in a stress-bearing area. We report that acral melanoma patients exhibit YAP amplification and increased YAP activity. We detected a decreasing stiffness gradient from the tumor to the surrounding area in the acral melanoma microenvironment. We further identified that this stiffness gradient could facilitate the negative durotaxis of melanoma cells. Our study advanced the understanding of mechanical force and YAP in acral melanoma and we proposed negative durotaxis as a new mechanism for melanoma dissemination.


Assuntos
Melanoma , Neoplasias Cutâneas , Humanos , Movimento Celular , Proteínas do Citoesqueleto , Microambiente Tumoral , Melanoma Maligno Cutâneo
13.
Comput Math Methods Med ; 2022: 5798857, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36262869

RESUMO

Objective: A previous meta-analysis has revealed that cold atmospheric plasma (CAP) might not be clinically beneficial to chronic wounds. However, several new randomized controlled trials (RCTs) reported that CAP was an effective treatment option for accelerating wound healing in chronic wounds. The purpose of this review is to incorporate these new results and evaluate the efficacy of CAP in chronic wounds. Methods: The major databases, including PubMed, Embase, Cochrane Library, and Web of Science, were searched for articles related to CAP treatment in chronic wounds until March 21, 2022. The literature retrieval and evaluation were carried out by two independent researchers. Result: A total of 13 randomized clinical trials published between 2010 and 2022 were finally included. CAP therapy showed to be more effective in reducing the area of wounds (mean difference (MD): -1.74, 95%; confidence interval (CI): [-3.14, -0.33], p = 0.02), compared with non-CAP treatments. The immediate reduction of the bacterial load was higher in the CAP group than in the control group. (MD: -0.37, 95%; CI: [-0.7, -0.05], p = 0.02). Conclusion: No significant changes were found in long-term antibacterial efficacy and pain perception between the two groups. However, more RCTs of excellent methodological quality are required to confirm technical details of the source of AP and the appropriate duration of the treatment with plasma.


Assuntos
Hipotermia Induzida , Gases em Plasma , Humanos , Gases em Plasma/uso terapêutico , Carga Bacteriana , Bases de Dados Factuais , Antibacterianos
14.
Anim Nutr ; 10: 86-98, 2022 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-35647324

RESUMO

A two-factor (2 × 3) orthogonal test was conducted to investigate the effects of dietary myo-inositol (MI) on the osmoregulation and carbohydrate metabolism of euryhaline fish tilapia (Oreochromis niloticus) under sustained hypertonic stress (20 practical salinity units [psu]). 6 diets containing either normal carbohydrate (NC, 30%) or high carbohydrate (HC, 45%) levels, with 3 levels (0, 400 and 1,200 mg/kg diet) of MI, respectively, were fed to 540 fish under 20 psu for 8 weeks. Dietary MI supplementation significantly improved growth performance and crude protein content of whole fish, and decreased the content of crude lipid of whole fish (P < 0.05). Curled, disordered gill lamella and cracked gill filament cartilage were observed in the gill of fish fed diets without MI supplementation. The ion transport capacity in gill was significantly improved in the 1,200 mg/kg MI supplementation groups compared with the 0 mg/kg MI groups (P < 0.05). Moreover, the contents of Na+, K+, Cl- in serum were markedly reduced with the dietary MI supplementation (P < 0.05). The fish fed 1,200 mg/kg MI supplementation had the highest MI content in the gills and the lowest MI content in the serum (P < 0.05). Additionally, the fish fed with 1,200 mg/kg MI supplementation had the highest MI synthesis capacity in gills and brain (P < 0.05). Dietary MI markedly promoted the ability of carbohydrate metabolism in liver (P < 0.05). Moreover, fish in the 1,200 mg/kg MI groups had the highest antioxidant capacity (P < 0.05). This study indicated that high dietary carbohydrate would intensify stress, and impair the ability of osmoregulation in tilapia under a long-term hypersaline exposure. The supplementation of MI at 1,200 mg/kg in the high carbohydrate diet could promote carbohydrate utilization and improve the osmoregulation capacity of tilapia under long-term hypertonic stress.

15.
Behav Brain Res ; 429: 113909, 2022 07 05.
Artigo em Inglês | MEDLINE | ID: mdl-35500719

RESUMO

Decisions under risk, either for gain or loss, are ubiquitous in our daily life. However, the extent to which the valence (gain or loss) of risky financial choices shapes outcome valuation and belief updating is a relatively overlooked research area. In the current study, we image neural activity using electroencephalography (EEG) combined with a financial decision task to investigate outcome valuation and belief updating. In the experimental task, subjects can either choose to take the risky gamble (stock) or the safe option (bond) and then report their belief over the quality of stock option in a trial-by-trial manner. Although the actual probabilities of the risky option are symmetric over gain and loss, we found an asymmetric effect of belief updating and risk preference, viz. the subjects tend to both report a higher probability for the stock to win and be more risk taking for potential gains compared to symmetric losses. The EEG data following feedback of stock payoff represents a parallel pattern which is resonant with the behavioral results. Notably, there is generally a greater FRN difference for feedback (correct vs. incorrect) in the gain condition compared to the loss condition, and the deflection of P300 is more prominent in gain condition than loss condition irrespective of the correctness. Lastly, while the P300 could be predictive for the subsequent probability estimate in both conditions (gain and loss), the FRN is only predictive for belief updating in the gain rather than loss condition. Therefore, both the behavioral and electrophysiological findings indicate an unbalanced processing of valence in shaping decisions under risk within financial learning in an experiential framework.


Assuntos
Tomada de Decisões , Jogo de Azar , Tomada de Decisões/fisiologia , Eletroencefalografia , Humanos , Probabilidade , Assunção de Riscos
16.
Chemistry ; 28(34): e202200543, 2022 Jun 15.
Artigo em Inglês | MEDLINE | ID: mdl-35384098

RESUMO

Despite the high specific capacity of Li-S battery, shuttle effect of lithium polysulfides (LiPSs) and safety issue pose a great challenge to realize its commercial application. Replacing liquid electrolyte with poly (ethylene oxide) (PEO) -based solid-state electrolyte is considered as a promising method to boost the safety, but the shuttle effect of LiPSs cannot be completely eliminated. In this work, a new kind of double-layer PEO-based polymer electrolyte is designed to restrict the LiPSs. The layer next to cathode consists of PEO and poly(vinylpyrrolidone) (PVP). The other layer consists of PEO. PVP with abundant of amide groups has been proved to have strong affinity to LiPSs. The strong interaction between LiPSs and carbonyl groups in amide is verified by Attenuated Total Reflection-Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy tests. As a result, the assembled Li-S battery exhibits a specific capacity of 1100 mAh g-1 and capacity retention of 347 mAh g-1 after 200 cycles at 60 °C and 0.05 C, while the capacity retention of the battery without PVP-blended PEO electrolyte remains only 27 % at the same conditions.

17.
Aquat Toxicol ; 245: 106131, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-35255275

RESUMO

Hypoxia can induce neural excitotoxicity in mammals, but this adverse effect has not been investigated in aquatic animals to date, especially in crustaceans. This study explored the induction effect and toxic mechanism of acute hypoxia stress (1.0 ± 0.1 mg dissolved oxygen /L) for 24 h on neural excitotoxicity in juvenile Chinese mitten crab, Eriocheir sinensis. The results showed that hemolymph glucose and serum lactic acid content were significantly increased, and the mRNA expression of crustacean hyperglycemic hormone and hypoxia-inducible factor 1α were significantly up-regulated in the hypoxia group compared with control. RNA-Seq results confirmed that acute hypoxia stress had a more significant impact on carbohydrate metabolism than lipid and protein metabolism. In addition, the TUNEL assay showed that the apoptosis rate of nerve cells was significantly higher in the hypoxia group than in the control, and similar trends were observed in the expression of apoptosis-related genes. RNA-Seq results also showed that acute hypoxia stress-induced neuronal apoptosis by regulating multiple apoptosis-related pathways. Moreover, free glutamate and GABA contents in the nerve tissue of thoracic ganglia were significantly higher in the hypoxia group than in the control group. Furthermore, the mRNA expression of NMDA related receptors was significantly up-regulated in the hypoxia group compared with the control. Similar trends were observed in the expression of calcium-dependent degrading enzymes and endogenous antioxidant-related proteins or enzymes. Meanwhile, the mRNA expression level of high-affinity neuronal glutamate transporter in the hypoxia group was significantly up-regulated compared with the control, whereas the vesicular glutamate transporter was significantly down-regulated. Furthermore, NMDA-R antagonists (MK-801 and Ro25-6981) injection showed that NMDA-R served as the bridge and core position of glutamate-induced neural neurotoxicity. This study provides a new perspective and theoretical guidance for exploring the regulation of hypoxic tolerance in E. sinensis.


Assuntos
Braquiúros , Poluentes Químicos da Água , Animais , China , Glucose/metabolismo , Hemolinfa , Hipóxia/metabolismo , Mamíferos , Poluentes Químicos da Água/toxicidade
18.
Drug Deliv ; 29(1): 624-636, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-35174748

RESUMO

Chemodynamic therapy (CDT) by triggering Fenton reaction or Fenton-like reaction to generate hazardous hydroxyl radical (•OH), is a promising strategy to selectively inhibit tumors with higher H2O2 levels and relatively acidic microenvironment. Current Fe-based Fenton nanocatalysts mostly depend on slowly releasing iron ions from Fe or Fe oxide-based nanoparticles, which leads to a limited rate of Fenton reaction. Herein, we employed black phosphorene nanosheets (BPNS), a biocompatible and biodegradable photothermal material, to develop iron-mineralized black phosphorene nanosheet (BPFe) by in situ deposition method for chemodynamic and photothermal combination cancer therapy. This study demonstrated that the BPFe could selectively increase cytotoxic ·OH in tumor cells whereas having no influence on normal cells. The IC50 of BPFe for tested tumor cells was about 3-6 µg/mL, which was at least one order of magnitude lower than previous Fe-based Fenton nanocatalysts. The low H2O2 level in normal mammalian cells guaranteed the rare cytotoxicity of BPFe. Moreover, the combination of photothermal therapy (PTT) with CDT based on BPFe was proved to kill tumors more potently with spatiotemporal accuracy, which exhibited excellent anti-tumor effects in xenografted MCF-7 tumor mice models.


Assuntos
Antineoplásicos/farmacologia , Doxorrubicina/farmacologia , Nanoestruturas/química , Neoplasias/patologia , Terapia Fototérmica/métodos , Animais , Antineoplásicos/administração & dosagem , Linhagem Celular Tumoral , Química Farmacêutica , Relação Dose-Resposta a Droga , Doxorrubicina/administração & dosagem , Portadores de Fármacos/química , Humanos , Peróxido de Hidrogênio/metabolismo , Concentração Inibidora 50 , Ferro/química , Camundongos , Fósforo/química , Distribuição Aleatória , Ensaios Antitumorais Modelo de Xenoenxerto
19.
J Ethnopharmacol ; 291: 115007, 2022 Jun 12.
Artigo em Inglês | MEDLINE | ID: mdl-35150815

RESUMO

ETHNOPHARMACOLOGY RELEVANCE: Polygonum capitatum Buch-Ham. ex D. Don (CNPC2009), a traditional Miao-national herbal medicine, has been widely used with considerable therapeutic efficacy in the treatment of various urologic disorders including prostatitis. However, the molecular mechanism of action (MOA) remains unclear. AIM OF THE STUDY: In this study, UPLC-Q-Exactive-MS and Network pharmacological methods were used to explore the underlying molecular MOA of Polygonum capitatum Buch-Ham. Ex D. Don (P.capitatum) for the treatment bacterial prostatitis (BP). MATERIALS AND METHODS: The UPLC-Q-Exactive-MS technique was used to identify the chemical components of P. capitatum. Databases such as SwissTargetPrediction, Gene Cards, and OMIM were used to predict the targets of P. capitatum for the treatment of BP. The Search Tool for the Retrieval of Interacting Genes/Proteins (STRING) was used to analyze the protein-protein interaction (PPI) and construct a PPI network, and the Metascape was used for Gene Ontology (GO) term enrichment and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis. In addition, experimental treatment of Escherichia coli (E.coli)-induced BP was verified. RESULTS: A total of 31 molecular components were identified by UPLC-Q-Exactive-MS. Network pharmacology revealed that P. capitatum may act on the AKT1, PI3K, MTO, EGFR and other targets through active components such as Gallic acid, Quercetin, Luteolin, Protocatechuic Acid, Kaempferol and thereby regulate PI3K-AKT, ErbB, AMPK, HIF-1, and other signaling pathways to intervene in the pathological mechanism of BP. Verification through experimental results showed that compared with the model group, treatment with P. capitatum could significantly inhibit bacterial growth in prostate tissues, lowered the prostate index, down-regulated the levels of inflammatory mediators(IL-1ß, IL-6, and TNF-α) in prostate tissues, and down-regulate the protein expression and mRNA expression levels of AKT and PI3K. CONCLUSION: This study preliminarily revealed the MOA of P. capitatum for treating BP with multiple components, multiple targets, and multiple pathways, especially affecting the PI3K-AKT signaling pathways.


Assuntos
Medicamentos de Ervas Chinesas , Polygonum , Prostatite , Medicamentos de Ervas Chinesas/química , Medicamentos de Ervas Chinesas/farmacologia , Medicamentos de Ervas Chinesas/uso terapêutico , Simulação de Acoplamento Molecular , Farmacologia em Rede , Fosfatidilinositol 3-Quinases/metabolismo , Polygonum/química , Prostatite/tratamento farmacológico
20.
Metab Brain Dis ; 36(8): 2461-2472, 2021 12.
Artigo em Inglês | MEDLINE | ID: mdl-34436746

RESUMO

Cerebral ischemia/reperfusion (I/R) injury remains a leading cause of death and disability. Long noncoding RNAs (lncRNAs) exert key functions in cerebral I/R injury. Here, we sought to elucidate the mechanism underlying the regulation of H19 in cerebral I/R cell injury. An in vitro model of cerebral I/R injury was created using oxygen-glucose deprivation/reoxygenation (OGD/R). The levels of H19, miR-1306-5p and B cell lymphoma-2 (Bcl-2)-like 13 (BCL2L13) were assessed by quantitative real-time polymerase chain reaction (qRT-PCR) or western blot. Cell viability and apoptosis were determined by the Cell Counting-8 Kit (CCK-8) assay and flow cytometry, respectively. The levels of lactate dehydrogenase (LDH) and cytokines were evaluated by enzyme-linked immunosorbent assays (ELISA). Direct relationships among H19, miR-1306-5p and BCL2L13 were verified by dual-luciferase reporter, RNA immunoprecipitation (RIP) and RNA pulldown assays. Our data showed that H19 and BCL2L13 were highly expressed in the cerebral I/R injury rats and OGD/R-triggered SK-N-SH and IMR-32 cells. The knockdown of H19 or BLC2L13 alleviated OGD/R-triggered injury in SK-N-SH and IMR-32 cells. Moreover, H19 silencing protected against OGD/R-triggered cell injury by down-regulating BCL2L13. H19 acted as a sponge of miR-1306-5p and BCL2L13 was a direct target of miR-1306-5p. H19 mediated BCL2L13 expression by sequestering miR-1306-5p. Furthermore, miR-1306-5p was a molecular mediator of H19 function. These results suggested that H19 silencing alleviated OGD/R-triggered I/R injury at least partially depending on the regulation of the miR-1306-5p/BCL2L13 axis.


Assuntos
MicroRNAs , RNA Longo não Codificante , Traumatismo por Reperfusão , Animais , Apoptose/genética , Glucose , MicroRNAs/genética , MicroRNAs/metabolismo , Oxigênio , RNA Longo não Codificante/genética , RNA Longo não Codificante/metabolismo , Ratos , Traumatismo por Reperfusão/metabolismo
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