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1.
RSC Adv ; 14(18): 12265-12277, 2024 Apr 16.
Artigo em Inglês | MEDLINE | ID: mdl-38633487

RESUMO

Four distinct CeO2 catalysts featuring varied morphologies (nanorods, nanocubes, nanoparticles, and nano spindle-shaped) were synthesized through a hydrothermal process and subsequently employed in the oxidation of dichloromethane (DCM). The findings revealed that the nano spindle-shaped CeO2 exhibited exposure of crystal faces (111), demonstrating superior catalytic oxidation performance for DCM with a T90 of 337 °C and notably excellent low-temperature catalytic activity (T50 = 192 °C). The primary reaction products were identified as HCl and CO2. Through obvious characterizations, it showed that the excellent catalytic activity presented by CeO2-s catalyst might be related to the higher oxygen vacancy concentration, surface active oxygen content, and superior redox performance caused by specific exposed crystal planes. Meanwhile, CeO2-s catalyst owned outstanding stability, reusability, and water inactivation regeneration, which had tremendous potential in practical treatment.

2.
World J Stem Cells ; 16(2): 114-125, 2024 Feb 26.
Artigo em Inglês | MEDLINE | ID: mdl-38455108

RESUMO

Human pluripotent stem cell (hPSC)-derived kidney organoids share similarities with the fetal kidney. However, the current hPSC-derived kidney organoids have some limitations, including the inability to perform nephrogenesis and lack of a corticomedullary definition, uniform vascular system, and coordinated exit pathway for urinary filtrate. Therefore, further studies are required to produce hPSC-derived kidney organoids that accurately mimic human kidneys to facilitate research on kidney development, regeneration, disease modeling, and drug screening. In this review, we discussed recent advances in the generation of hPSC-derived kidney organoids, how these organoids contribute to the understanding of human kidney development and research in disease modeling. Additionally, the limitations, future research focus, and applications of hPSC-derived kidney organoids were highlighted.

3.
Adv Sci (Weinh) ; 11(19): e2305947, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38477409

RESUMO

Tissue homeostasis and disease states rely on the formation of new blood vessels through angiogenic sprouting, which is tightly regulated by the properties of the surrounding extracellular matrix. While physical cues, such as matrix stiffness or degradability, have evolved as major regulators of cell function in tissue microenvironments, it remains unknown whether and how physical cues regulate endothelial cell migration during angiogenesis. To investigate this, a biomimetic model of angiogenic sprouting inside a tunable synthetic hydrogel is created. It is shown that endothelial cells sense the resistance of the surrounding matrix toward proteolytic cleavage and respond by adjusting their migration phenotype. The resistance cells encounter is impacted by the number of covalent matrix crosslinks, crosslink degradability, and the proteolytic activity of cells. When matrix resistance is high, cells switch from a collective to an actomyosin contractility-dependent single cellular migration mode. This switch in collectivity is accompanied by a major reorganization of the actin cytoskeleton, where stress fibers are no longer visible, and F-actin aggregates in large punctate clusters. Matrix resistance is identified as a previously unknown regulator of angiogenic sprouting and, thus, provides a mechanism by which the physical properties of the matrix impact cell migration modes through cytoskeletal remodeling.


Assuntos
Movimento Celular , Matriz Extracelular , Neovascularização Fisiológica , Proteólise , Movimento Celular/fisiologia , Neovascularização Fisiológica/fisiologia , Matriz Extracelular/metabolismo , Humanos , Células Endoteliais/metabolismo , Células Endoteliais/fisiologia , Células Endoteliais da Veia Umbilical Humana/metabolismo , Hidrogéis/química
4.
J Control Release ; 369: 12-24, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38508526

RESUMO

Neutrophil membrane-coated nanoparticles (NM-NPs) are nanomedicines with traits of mimicking the surface properties and functions of neutrophils, which are the most abundant type of white blood cells in the human body. NM-NPs have been widely used as targeted drug delivery systems for various inflammatory diseases, but their intrinsic effects on inflammation are not fully characterized yet. This study found that NM-NPs could modulate inflammation by multiple mechanisms without drug loading. NM-NPs could inhibit the recruitment of neutrophils and macrophages to the inflamed site by capturing chemokines and blocking their adhesion to inflamed endothelial cells. After internalized by macrophages and other phagocytic cells, NM-NPs could alter their phenotype by phosphatidylserine and simultaneously degrade the sequestered and neutralized cytokines and chemokines by lysosomal degradation. Under these effects, NM-NPs exhibited significant anti-inflammatory effects on LPS-induced inflammatory liver injury in vivo without drug loading. Our study unveiled the anti-inflammatory effects and mechanisms of NM-NPs without drug loading, and provided new insights and evidence for understanding their biological effects and safety, as well as developing more effective and safe targeted drug delivery systems.


Assuntos
Anti-Inflamatórios , Inflamação , Macrófagos , Nanopartículas , Neutrófilos , Nanopartículas/administração & dosagem , Animais , Neutrófilos/efeitos dos fármacos , Neutrófilos/metabolismo , Anti-Inflamatórios/administração & dosagem , Anti-Inflamatórios/farmacologia , Humanos , Macrófagos/efeitos dos fármacos , Macrófagos/metabolismo , Inflamação/tratamento farmacológico , Citocinas/metabolismo , Masculino , Camundongos , Membrana Celular/metabolismo , Membrana Celular/efeitos dos fármacos , Camundongos Endogâmicos C57BL , Lipopolissacarídeos , Células RAW 264.7 , Sistemas de Liberação de Medicamentos , Células Endoteliais da Veia Umbilical Humana
5.
Nat Commun ; 15(1): 958, 2024 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-38302464

RESUMO

Macrolactones exhibit distinct conformational and configurational properties and are widely found in natural products, medicines, and agrochemicals. Up to now, the major effort for macrolactonization is directed toward identifying suitable carboxylic acid/alcohol coupling reagents to address the challenges associated with macrocyclization, wherein the stereochemistry of products is usually controlled by the substrate's inherent chirality. It remains largely unexplored in using catalysts to govern both macrolactone formation and stereochemical control. Here, we disclose a non-enzymatic organocatalytic approach to construct macrolactones bearing chiral planes from achiral substrates. Our strategy utilizes N-heterocyclic carbene (NHC) as a potent acylation catalyst that simultaneously mediates the macrocyclization and controls planar chirality during the catalytic process. Macrolactones varying in ring sizes from sixteen to twenty members are obtained with good-to-excellent yields and enantiomeric ratios. Our study shall open new avenues in accessing macrolactones with various stereogenic elements and ring structures by using readily available small-molecule catalysts.

6.
Angew Chem Int Ed Engl ; 62(45): e202310072, 2023 Nov 06.
Artigo em Inglês | MEDLINE | ID: mdl-37731165

RESUMO

The direct functionalization of inert C(sp3 )-H bonds to form carbon-carbon and carbon-heteroatom bonds offers vast potential for chemical synthesis and therefore receives increasing attention. At present, most successes come from strategies using metal catalysts/reagents or photo/electrochemical processes. The use of organocatalysis for this purpose remains scarce, especially when dealing with challenging C-H bonds such as those from simple alkanes. Here we disclose the first organocatalytic direct functionalization/acylation of inert C(sp3 )-H bonds of completely unfunctionalized alkanes. Our approach involves N-heterocyclic carbene catalyst-mediated carbonyl radical intermediate generation and coupling with simple alkanes (through the corresponding alkyl radical intermediates generated via a hydrogen atom transfer process). Unreactive C-H bonds are widely present in fossil fuel feedstocks, commercially important organic polymers, and complex molecules such as natural products. Our present study shall inspire a new avenue for quick functionalization of these molecules under the light- and metal-free catalytic conditions.

7.
STAR Protoc ; 4(3): 102456, 2023 Sep 15.
Artigo em Inglês | MEDLINE | ID: mdl-37515766

RESUMO

The first direct contact between the embryo and the mother is established during implantation. This process is inaccessible for direct studies as the implanting embryo is concealed by the maternal tissues. Here, we present a protocol for establishing a 3D biomimetic environment based on synthetic hydrogels which harbor key biomechanical properties of the uterine stroma. We describe steps for isolating and culturing embryos in PEG/DexMA hydrogel. We then detail the co-culture of embryos and endothelial cells in a microfluidic device. For complete details on the use and execution of this protocol, please refer to Govindasamy et al. (2021)1 and Ozguldez et al. (2023).2.


Assuntos
Biomimética , Células Endoteliais , Técnicas de Cocultura , Embrião de Mamíferos , Trofoblastos
8.
Cell Rep ; 42(4): 112313, 2023 04 25.
Artigo em Inglês | MEDLINE | ID: mdl-36989113

RESUMO

The extra-embryonic tissues that form the placenta originate from a small population of trophectoderm cells with stem cell properties, positioned at the embryonic pole of the mouse blastocyst. During the implantation stages, the polar trophectoderm rapidly proliferates and transforms into extra-embryonic ectoderm. The current model of trophoblast morphogenesis suggests that tissue folding reshapes the trophoblast during the blastocyst to egg cylinder transition. Instead of through folding, here we found that the tissue scale architecture of the stem cell compartment of the trophoblast lineage is reorganized via inversion of the epithelial polarity axis. Our findings show the developmental significance of polarity inversion and provide a framework for the morphogenetic transitions in the peri-implantation trophoblast.


Assuntos
Blastocisto , Trofoblastos , Gravidez , Feminino , Camundongos , Animais , Células-Tronco , Implantação do Embrião , Placenta , Linhagem da Célula , Diferenciação Celular
9.
Development ; 150(2)2023 01 15.
Artigo em Inglês | MEDLINE | ID: mdl-36515556

RESUMO

In both physiological processes and disease contexts, migrating cells have the ability to adapt to conditions in their environment. As an in vivo model for this process, we use zebrafish primordial germ cells that migrate throughout the developing embryo. When migrating within an ectodermal environment, the germ cells form fewer and smaller blebs when compared with their behavior within mesodermal environment. We find that cortical tension of neighboring cells is a parameter that affects blebbing frequency. Interestingly, the change in blebbing activity is accompanied by the formation of more actin-rich protrusions. These alterations in cell behavior that correlate with changes in RhoA activity could allow the cells to maintain dynamic motility parameters, such as migration speed and track straightness, in different settings. In addition, we find that the polarity of the cells can be affected by stiff structures positioned in their migration path This article has an associated 'The people behind the papers' interview.


Assuntos
Actinas , Peixe-Zebra , Animais , Movimento Celular/fisiologia , Células Germinativas
10.
Pharm Biol ; 60(1): 1884-1898, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36215067

RESUMO

CONTEXT: Guanxin V (GX), a traditional Chinese medicine formula, is safe and effective in the treatment of coronary artery disease. However, its protective effect on myocardial ischaemia reperfusion injury (MIRI) is unclear. OBJECTIVE: To investigate the cardioprotective effect of GX on MIRI and explore the potential mechanism. MATERIALS AND METHODS: Sprague-Dawley male rats were divided into Sham, MIRI and MIRI + GX groups. GX (6 g/kg) was administered to rats via intragastric administration for seven days before ischaemia reperfusion (IR) surgery. The infarct size, histopathology, serum enzyme activities, ultrastructure of the cardiac mitochondria were assessed. H9c2 cells were pre-treated with GX (0.5 mg/mL), and then exposed to hypoxia/reoxygenation (HR). The cell viability and LDH levels were measured. Network pharmacology was conducted to predict the potential mechanism. The related targets of GX were predicted using the TCMSP database, DrugBank database, etc. Finally, pharmacological experiments were used to validate the predicted results. RESULTS: In vivo, GX significantly reduced the myocardial infarct size from 56.33% to 17.18%, decreased the levels of AST (239.32 vs. 369.18 U/L), CK-MB (1324.61 vs. 2066.47 U/L) and LDH (1245.26 vs. 1969.62 U/L), and reduced mitochondrial damage. In vitro, GX significantly increased H9c2 cell viability (IC50 = 3.913 mg/mL) and inhibited the release of LDH (207.35 vs. 314.33). In addition, GX could maintain iron homeostasis and reduce oxidative stress level by regulating iron metabolism-associated proteins. CONCLUSIONS: GX can attenuate MIRI via regulating iron homeostasis, indicating that GX may act as a potential candidate for the treatment of MIRI.


Assuntos
Traumatismo por Reperfusão Miocárdica , Animais , Apoptose , Medicamentos de Ervas Chinesas , Homeostase , Ferro , Masculino , Traumatismo por Reperfusão Miocárdica/tratamento farmacológico , Traumatismo por Reperfusão Miocárdica/metabolismo , Traumatismo por Reperfusão Miocárdica/prevenção & controle , Miócitos Cardíacos , Ratos , Ratos Sprague-Dawley
11.
Pharm Biol ; 60(1): 1790-1800, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36102587

RESUMO

CONTEXT: Jing-an oral liquid (JA) is a Chinese herbal formula used in the treatment of Tourette syndrome (TS); however, its mechanism is unclear. OBJECTIVE: To investigate the effects of JA on amino acid neurotransmitters and microglia activation in vivo and in vitro. MATERIALS AND METHODS: Sixty male Sprague-Dawley rats were divided into a control group and 5 TS groups. TS was induced in rats with intraperitoneal injection of 1-(2,5-dimethoxy-4-iodophenyl)-2-aminopropane (1 mg/kg) and in BV2 cells with lipopolysaccharide. Control and model rats were administered saline, whereas treatment groups were administered JA (5.18, 10.36, or 20.72 g/kg) or tiapride (a benzamide, 23.5 mg/kg) by gavage once daily for 21 days. Stereotypic behaviour was tested. The levels of N-methyl-d-aspartate receptor (NMDAR)/mitogen-activated protein kinase/cAMP response element-binding protein (CREB)-related proteins in striatum and BV2 cells were measured via western blots. CD11b and IBa1 levels were also measured. Ultra-high-performance liquid-chromatography was used to determine γ-aminobutyric acid (GABA), glutamic acid (Glu), and aspartic acid (ASP) levels. RESULTS: JA markedly alleviated the stereotype behaviour (25.92 ± 0.35 to 13.78 ± 0.47) in rats. It also increased NMDAR1 (0.48 ± 0.09 to 0.67 ± 0.08; 0.54 ± 0.07 to 1.19 ± 0.18) expression and down-regulated the expression of p-ERK, p-JNK, p-P38, and p-CREB in BV2 cells and rat striatum. Additionally, Glu, ASP, GABA, CD11b, and IBa1 levels were significantly decreased by JA. DISCUSSION AND CONCLUSIONS: JA suppressed microglia activation and regulated the levels of amino acid neurotransmitters, indicating that it could be a promising therapeutic agent for TS.


Assuntos
Síndrome de Tourette , Animais , Proteína de Ligação ao Elemento de Resposta ao AMP Cíclico/metabolismo , Ácido Glutâmico , Masculino , Ratos , Ratos Sprague-Dawley , Receptores de N-Metil-D-Aspartato , Síndrome de Tourette/tratamento farmacológico , Síndrome de Tourette/metabolismo , Ácido gama-Aminobutírico
12.
Adv Sci (Weinh) ; 9(12): e2105325, 2022 04.
Artigo em Inglês | MEDLINE | ID: mdl-35187856

RESUMO

While matrix stiffness regulates cell behavior on 2D substrates, recent studies using synthetic hydrogels have suggested that in 3D environments, cell behavior is primarily impacted by matrix degradability, independent of stiffness. However, these studies did not consider the potential impact of other confounding matrix parameters that typically covary with changes in stiffness, particularly, hydrogel swelling and hydrolytic stability, which may explain the previously observed distinctions in cell response in 2D versus 3D settings. To investigate how cells sense matrix stiffness in 3D environments, a nonswelling, hydrolytically stable, linearly elastic synthetic hydrogel model is developed in which matrix stiffness and degradability can be tuned independently. It is found that matrix degradability regulates cell spreading kinetics, while matrix stiffness dictates the final spread area once cells achieve equilibrium spreading. Importantly, the differentiation of human mesenchymal stromal cells toward adipocytes or osteoblasts is regulated by the spread state of progenitor cells upon initiating differentiation. These studies uncover matrix stiffness as a major regulator of cell function not just in 2D, but also in 3D environments, and identify matrix degradability as a critical microenvironmental feature in 3D that in conjunction with matrix stiffness dictates cell spreading, cytoskeletal state, and stem cell differentiation outcomes.


Assuntos
Hidrogéis , Células-Tronco Mesenquimais , Diferenciação Celular , Matriz Extracelular , Humanos
13.
Artigo em Inglês | MEDLINE | ID: mdl-36742270

RESUMO

Objective: Tourette syndrome (TS) is a chronic neuropsychiatric disorder characterized by abnormal movements, phonations, and tics, but an accurate TS diagnosis remains challenging and indeed depends on its description of clinical symptoms. Our study was conducted to discover and verify some metabolite biomarkers based on nontargeted and targeted metabolomics. Methods: We conducted untargeted ultrahigh-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOF/MS) for preliminary screening of potential biomarkers on 30 TS patients and 10 healthy controls and then performed validation experiments based on targeted ultrahigh-performance liquid chromatography triple quadrupole-MS (UHPLC/MS/MS) on 35 TS patients and 14 healthy controls. Results: 1775 differentially expressed metabolites were identified by partial least squares discriminant analysis (PLS-DA), fold-change analysis, T-test, and hierarchical clustering analysis (adjusted p value <0.05 and |logFC| > 1). TS plasma samples were found to be differentiated from healthy samples in our approach. Furthermore, aspartate and asparagine metabolism pathways were considered to be a significant enrichment pathway in TS progression based on metabolite pathway enrichment analysis. For the 8 metabolites involved in this pathway that we detected, we then performed validation experiments based on targeted UHPLC/MS/MS. The t-test, Mann-Whitney U test, and receiver operating characteristic (ROC) curve analysis were used to determine potential biomarkers. Ultimately, L-arginine and L-pipecolic acid were validated as significantly differentiated metabolites (p < 0.05), with an AUC of 70.0% and 80.3%, respectively. Conclusion: L-pipecolic acid was defined as a potential biomarker for TS diagnosis by the combined application of nontargeted and targeted metabolomic analysis.

14.
Dev Cell ; 56(23): 3276-3287.e8, 2021 12 06.
Artigo em Inglês | MEDLINE | ID: mdl-34741805

RESUMO

The process of implantation and the cellular interactions at the embryo-maternal interface are intrinsically difficult to analyze, as the implanting embryo is concealed by the uterine tissues. Therefore, the mechanisms mediating the interconnection of the embryo and the mother are poorly understood. Here, we established a 3D biomimetic culture environment that harbors the key features of the murine implantation niche. This culture system enabled direct analysis of trophoblast invasion and revealed the first embryonic interactions with the maternal vasculature. We found that implantation is mediated by the collective migration of penetrating strands of trophoblast giant cells, which acquire the expression of vascular receptors, ligands, and adhesion molecules, assembling a network for communication with the maternal blood vessels. In particular, Pdgf signaling cues promote the establishment of the heterologous contacts. Together, the biomimetic platform and our findings thereof elucidate the hidden dynamics of the early interactions at the implantation site.


Assuntos
Blastocisto/metabolismo , Vasos Sanguíneos/metabolismo , Comunicação Celular , Embrião de Mamíferos/metabolismo , Desenvolvimento Embrionário , Troca Materno-Fetal , Trofoblastos/metabolismo , Animais , Biomimética , Blastocisto/citologia , Vasos Sanguíneos/citologia , Técnicas de Cultura de Células , Movimento Celular , Implantação do Embrião , Embrião de Mamíferos/citologia , Feminino , Células Gigantes/citologia , Células Gigantes/metabolismo , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Endogâmicos CBA , Gravidez , Trofoblastos/citologia
15.
Nat Commun ; 12(1): 3402, 2021 06 07.
Artigo em Inglês | MEDLINE | ID: mdl-34099677

RESUMO

A major deficit in tissue engineering strategies is the lack of materials that promote angiogenesis, wherein endothelial cells from the host vasculature invade the implanted matrix to form new blood vessels. To determine the material properties that regulate angiogenesis, we have developed a microfluidic in vitro model in which chemokine-guided endothelial cell sprouting into a tunable hydrogel is followed by the formation of perfusable lumens. We show that long, perfusable tubes only develop if hydrogel adhesiveness and degradability are fine-tuned to support the initial collective invasion of endothelial cells and, at the same time, allow for matrix remodeling to permit the opening of lumens. These studies provide a better understanding of how cell-matrix interactions regulate angiogenesis and, therefore, constitute an important step towards optimal design criteria for tissue-engineered materials that require vascularization.


Assuntos
Matriz Extracelular/química , Hidrogéis/química , Neovascularização Fisiológica , Engenharia Tecidual/métodos , Adesividade , Dextranos/química , Células Endoteliais da Veia Umbilical Humana , Humanos , Dispositivos Lab-On-A-Chip , Metacrilatos/química , Sulfonas/química , Engenharia Tecidual/instrumentação
16.
Anal Chim Acta ; 1145: 124-131, 2021 Feb 08.
Artigo em Inglês | MEDLINE | ID: mdl-33453873

RESUMO

Serotonin is one of the important neurotransmitters in human nervous system and associated with central nervous system diseases. Herein, we have prepared a novel electrochemical aptasensor for rapid and sensitive detection of serotonin by using the pre-designed and prepared DNA aptamers. In the absence of serotonin, the electron transfer rate on the aptasensor was faster than that in the presence of serotonin due to the hairpin structure of the aptamer was loose and MB could be closer to the electrode surface. While in the presence of serotonin, the hairpin structure of the aptamer was extended and MB was far away from the electrode surface. The effect of MB labeled sites on analytical performances of the proposed aptasensors was discussed by comparing sensitivity of the aptasensors that MB labeled in the intermediate of the aptamer with that MB labeled at the 3' end of the aptamer. It was found that sensitivity of the intermediate-labeled aptasensor was much higher than the terminal-labeled aptasensor due to the specific conformational changes before and after aptamer binding to serotonin. The developed aptasensors exhibits a rapid electrochemical response and high sensitivity for the determination of serotonin. Under the optimal experimental conditions, the linear range for serotonin concentrations by the intermediate-labeled aptasensor was 1 pM-10 nM with a detection limit of 0.017 fM (S/N = 3). Moreover, the proposed aptasensor is reusable and shows good reproducibility and selectivity for the detection of serotonin in 100-fold diluted rat cerebrospinal fluid, suggesting a good application prospect in the detection of serotonin in real samples.


Assuntos
Aptâmeros de Nucleotídeos , Técnicas Biossensoriais , Animais , Técnicas Eletroquímicas , Ouro , Limite de Detecção , Neurotransmissores , Ratos , Reprodutibilidade dos Testes , Serotonina
17.
J Biochem Mol Toxicol ; 33(10): e22389, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31468582

RESUMO

The aim is to study the effects of gastrodin (GA) on striatal inflammation and oxidative stress in rats with Tourette syndrome (TS). The rat model of TS was induced by 3,3'-iminodipropionitrile. Behavioral tests were carried out by stereotype experiment. The concentrations of amino acid transmitters glutamic acid (Glu) and γ-aminobutyric acid (GABA) in striatum were determined by high-performance liquid chromatography. Superoxide dismutase (SOD) and malondialdehyde (MDA) in serum and striatum were detected by commercial kits. Cytokines in serum and striatum were detected by enzyme-linked immunosorbent assay kits. Western blot analysis was used to detect striatum nuclear erythroid factor 2-related factor 2 (Nrf-2)/heme oxygenase-1 (HO-1)/high mobility group box 1 protein (HMGB1)/nuclear factor-кB (NF-кB) pathway-related proteins. The expressions of Nrf-2 and P-NF-кBp65 in striatum were detected by immunohistochemistry. Compared with the control group, the stereotype scores of rats in the model group significantly increased, and the contents of Glu and GABA in striatum obviously increased. GA significantly reduced the stereotype scores and decreased the contents of Glu and GABA. The levels of SOD in serum and striatum were decreased and the content of MDA in serum and striatum were increased compared with the control group, while GA significantly restored the changes. GA significantly adjusted Nrf-2/HO-1/HMGB1/NF-кB pathway-related proteins changes consistent with immunohistochemical changes. GA may protect striatum of rats with TS by regulating Nrf-2/HO-1/HMGB1/NF-кB pathway protein changes in striatum.


Assuntos
Álcoois Benzílicos/uso terapêutico , Glucosídeos/uso terapêutico , Proteína HMGB1/metabolismo , Heme Oxigenase-1/metabolismo , Fator 2 Relacionado a NF-E2/metabolismo , NF-kappa B/metabolismo , Síndrome de Tourette/tratamento farmacológico , Animais , Corpo Estriado/efeitos dos fármacos , Corpo Estriado/enzimologia , Corpo Estriado/metabolismo , Citocinas/sangue , Citocinas/metabolismo , Ácido Glutâmico/metabolismo , Masculino , Malondialdeído/metabolismo , Ratos , Ratos Sprague-Dawley , Superóxido Dismutase/sangue , Superóxido Dismutase/metabolismo , Síndrome de Tourette/enzimologia , Síndrome de Tourette/metabolismo , Ácido gama-Aminobutírico/metabolismo
18.
Neurotox Res ; 36(4): 756-763, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31243645

RESUMO

Tourette syndrome (TS) is characterized by one of the chronic neuropsychiatric disorders in multiple children, and the pathogenesis of Tourette syndrome (TS) has not been previously elucidated.The aim of this study was designed to investigate the effects of rhynchophylline (RH) on Tourette syndrome (TS) in rats.TS model was established in rats and BV2 cells by the selective 5-HT2A/2C agonist 1-(2,5-dimethoxy-4-iodophenyl)-2-aminopropane (DOI). Behavior evaluations including stereotypy recording and autonomic activity test were performed. Inflammatory cytokine levels such as interleukin-1ß (IL-1ß), interleukin-6 (IL-6), and tumor necrosis factor-α (TNF-α) in serum, striatum, and cell supernatant were detected. The expression levels of BDNF/NF-κB pathway in striatum and BV2 cells were measured by Western blot. Dopamine (DA) and dopamine receptor D 2 (D2) in striatum were also measured.Data indicated that RH significantly decreased IL-6, IL-1ß, and TNF-α in serum, striatum, and cell supernatant of TS model, with altered expression of P-NF-κBp65, P-IκBα, and BDNF in TS rats, and DOI-induced BV2 cells, as evidenced by Western blot analysis and immunohistochemistry analysis. RH also significantly reduced the levels of DA and D2 in striatum.Our results shown that the regulation of BDNF/NF-κB pathway might be involved in the effects of RH on TS model.


Assuntos
Fator Neurotrófico Derivado do Encéfalo/metabolismo , NF-kappa B/metabolismo , Fármacos Neuroprotetores/administração & dosagem , Oxindóis/administração & dosagem , Síndrome de Tourette/tratamento farmacológico , Síndrome de Tourette/metabolismo , Animais , Comportamento Animal/efeitos dos fármacos , Linhagem Celular , Sobrevivência Celular/efeitos dos fármacos , Corpo Estriado/efeitos dos fármacos , Corpo Estriado/metabolismo , Dopamina/metabolismo , Encefalite/complicações , Encefalite/metabolismo , Mediadores da Inflamação/metabolismo , Masculino , Ratos Wistar , Receptores de Dopamina D2/metabolismo , Transdução de Sinais , Síndrome de Tourette/complicações
19.
Atherosclerosis ; 284: 110-120, 2019 05.
Artigo em Inglês | MEDLINE | ID: mdl-30897380

RESUMO

BACKGROUND AND AIMS: Oxidative stress-induced endothelial dysfunction is considered to exert a vital role in the development of atherosclerotic coronary heart disease (CHD). NRF2 is a key transcriptional factor against oxidative stress through activation of multiple ARE-mediated genes. Z-Lig is derived from the Ligusticum species with antitumor, anti-inflammation and neuroprotection activities. However, the antioxidant potentials of Z-Lig on endothelial dysfunction and atherosclerosis have not been well elucidated. Therefore, in the present work, we appraise the cytoprotective property and anti-atherosclerosis effect of Z-Lig. METHODS: Potential NRF2 activators were screened and verified by luciferase reporter gene assay. The protein and mRNA levels of NRF2 and ARE-mediated genes, and GSH/GSSG level in EA.hy926 cells treated with Z-Lig were detected. The cytoprotective property of Z-Lig was assessed in the tert-butyl hydroperoxide (t-BHP)-evoked oxidative stress model. Cell viability and reactive oxygen species (ROS) levels in EA.hy926 cells were determined. An atherosclerosis model induced by HFD was used to determine the anti-atherosclerosis effect of Z-Lig in HFD-fed Ldlr-deficient mice. RESULTS: In vitro, 100 µM Z-Lig upregulated expressions of NRF2 and ARE-driven genes, promoted accumulation of nuclear NRF2 and unbound NRF2- KEAP1 complex in EA.hy926 cells. Furthermore, Z-Lig alleviated oxidative stress and cell injury caused by t-BHP via stimulation of the NRF2/ARE pathway. In vivo, intervention with 20 mg/kg Z-Lig markedly restrained atherosclerosis progression, including attenuation of HFD-induced atherosclerotic plaque formation, alleviation of lipid peroxidation and increase in antioxidant enzyme activity in aortas of HFD-fed Ldlr-/- mice. The chemopreventive effects of Z-Lig might be associated with the activation of NRF2 and ARE-driven genes. CONCLUSIONS: The present study suggested that Z-Lig is an effective NRF2 activator, which can protect vascular endothelial cells from oxidative stress and rescue HFD-induced atherosclerosis.


Assuntos
4-Butirolactona/análogos & derivados , Aterosclerose/etiologia , Dieta Hiperlipídica/efeitos adversos , Células Endoteliais/efeitos dos fármacos , Células Endoteliais/metabolismo , Fator 2 Relacionado a NF-E2/efeitos dos fármacos , Fator 2 Relacionado a NF-E2/genética , Estresse Oxidativo/efeitos dos fármacos , 4-Butirolactona/farmacologia , 4-Butirolactona/uso terapêutico , Animais , Aterosclerose/tratamento farmacológico , Células Cultivadas , Masculino , Camundongos , Camundongos Endogâmicos C57BL
20.
J Biochem Mol Toxicol ; 33(5): e22302, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-30790395

RESUMO

OBJECTIVE: Tourette syndrome (TS) is a chronic neuropsychiatric disorder. Its clinical manifestations are involuntary and recurrent muscle twitch, resulting in motor twitch and occurrence twitch. Traditional Chinese medicine has obvious advantages in treating TS. The aim of this study was to investigate the effects and mechanism of gastrodin on 1-(2,5-dimethoxy-4-iodophenyl)-2-aminopropane (DOI)-induced TS in rats. METHODS: TS model was induced by DOI. Behaviors in TS rats were detected. The striatum, serum inflammatory factors interleukin-6, interleukin-1ß, and tumor necrosis factor-a were detected by enzyme-linked immunosorbent assay. Western blot technique was used to detect the expressions of TLR/NF-κB and TLR/MAPK signaling pathways in the striatum. RESULTS: Gastrodin can significantly improve behavioral changes of TS rats induced by DOI, reduce inflammatory factors in serum and striatum in TS rats, and inhibit activation of TLR/NF-κB and TLR/MAPK signaling in striatum in TS rats. CONCLUSION: Gastrodin can significantly relieve the TS induced by DOI in rats. Its mechanism is related to the inhibition of striatal TLR/NF-κB and TLR/MAPK signaling activation.


Assuntos
Anfetaminas/toxicidade , Comportamento Animal/efeitos dos fármacos , Álcoois Benzílicos/farmacologia , Glucosídeos/farmacologia , Sistema de Sinalização das MAP Quinases/efeitos dos fármacos , Síndrome de Tourette/tratamento farmacológico , Animais , Citocinas/metabolismo , Modelos Animais de Doenças , Inflamação/induzido quimicamente , Inflamação/tratamento farmacológico , Inflamação/metabolismo , Inflamação/patologia , Masculino , Ratos , Ratos Sprague-Dawley , Síndrome de Tourette/induzido quimicamente , Síndrome de Tourette/metabolismo , Síndrome de Tourette/patologia
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