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1.
Nutrients ; 16(6)2024 Mar 17.
Artigo em Inglês | MEDLINE | ID: mdl-38542782

RESUMO

Dietary supplements enriched with bioactive compounds represent a promising approach to influence physiological processes and enhance longevity and overall health. Cynara cardunculus var. scolymus serves as a functional food supplement with a high concentration of bioactive compounds, which offers various health-promoting benefits. Several chronic diseases have metabolic, genetic, or inflammatory origins, which are frequently interconnected. Pharmacological treatments, although effective, often result in undesirable side effects. In this context, preventive approaches are gaining increased attention. Recent literature indicates that the consumption of bioactive compounds in the diet can positively influence the organism's biological functions. Polyphenols, well-known for their health benefits, are widely recognized as valuable compounds in preventing/combating various pathologies related to lifestyle, metabolism, and aging. The C. scolymus belonging to the Asteraceae family, is widely used in the food and herbal medicine fields for its beneficial properties. Although the inflorescences (capitula) of the artichoke are used for food and culinary purposes, preparations based on artichoke leaves can be used as an active ingredient in herbal medicines. Cynara scolymus shows potential benefits in different domains. Its nutritional value and health benefits make it a promising candidate for improving overall well-being. C. scolymus exhibits anti-inflammatory, antioxidant, liver-protective, bile-expelling, antimicrobial, and lipid-lowering neuroprotective properties. Different studies demonstrate that oxidative stress is the leading cause of the onset and progression of major human health disorders such as cardiovascular, neurological, metabolic, and cancer diseases. The large amount of polyphenol found in C. scolymus has an antioxidant activity, enabling it to neutralize free radicals, preventing cellular damage. This reduces the subsequent risk of developing conditions such as cancer, diabetes, and cardiovascular diseases. Additionally, these polyphenols demonstrate anti-inflammatory activity, which is closely associated with their antioxidant properties. As a result, C. scolymus has the potential to contribute to the treatment of chronic diseases, including intestinal disorders, cardiovascular diseases, and neurodegenerative pathologies. The current review discussed the nutritional profiles, potential benefits, and pharmacological effects of C. scolymus.


Assuntos
Doenças Cardiovasculares , Cynara scolymus , Neoplasias , Humanos , Antioxidantes/farmacologia , Antioxidantes/uso terapêutico , Antioxidantes/metabolismo , Polifenóis/farmacologia , Polifenóis/metabolismo , Extratos Vegetais/farmacologia , Extratos Vegetais/uso terapêutico , Extratos Vegetais/metabolismo , Doença Crônica , Anti-Inflamatórios/farmacologia
2.
Molecules ; 28(8)2023 Apr 10.
Artigo em Inglês | MEDLINE | ID: mdl-37110573

RESUMO

Microglia, the resident macrophage-like population in the central nervous system, play a crucial role in the pathogenesis of many neurodegenerative disorders by triggering an inflammatory response that leads to neuronal death. Neuroprotective compounds to treat or prevent neurodegenerative diseases are a new field of study in modern medicine. Microglia are activated in response to inflammatory stimuli. The pathogenesis of various neurodegenerative diseases is closely related to the constant activation of microglia due to their fundamental role as a mediator of inflammation in the brain environment. α-Tocopherol, also known as vitamin E, is reported to possess potent neuroprotective effects. The goal of this study was to investigate the biological effects of vitamin E on BV2 microglial cells, as a possible neuroprotective and anti-inflammatory agent, following stimulation with lipopolysaccharide (LPS). The results showed that the pre-incubation of microglia with α-tocopherol can guarantee neuroprotective effects during microglial activation induced by LPS. α-Tocopherol preserved the branched morphology typical of microglia in a physiological state. It also reduced the migratory capacity; the production of pro-inflammatory and anti-inflammatory cytokines such as TNF-α and IL-10; and the activation of receptors such as TRL4 and CD40, which modulate the PI3K-Akt signaling pathway. The results of this study require further insights and research, but they present new scenarios for the application of vitamin E as an antioxidant for the purpose of greater neuroprotection in vivo for the prevention of possible neurodegenerative diseases.


Assuntos
Doenças Neurodegenerativas , Fármacos Neuroprotetores , Humanos , Lipopolissacarídeos/farmacologia , Microglia , alfa-Tocoferol/farmacologia , alfa-Tocoferol/metabolismo , Fármacos Neuroprotetores/farmacologia , Fármacos Neuroprotetores/metabolismo , Fosfatidilinositol 3-Quinases/metabolismo , Macrófagos/metabolismo , Anti-Inflamatórios/farmacologia , Anti-Inflamatórios/metabolismo , Vitamina E/farmacologia , Doenças Neurodegenerativas/tratamento farmacológico , Doenças Neurodegenerativas/prevenção & controle , Doenças Neurodegenerativas/metabolismo , Óxido Nítrico/metabolismo , NF-kappa B/metabolismo
3.
Cells ; 12(5)2023 02 21.
Artigo em Inglês | MEDLINE | ID: mdl-36899817

RESUMO

Resveratrol is a polyphenol that acts as antioxidants do, protecting the body against diseases, such as diabetes, cancer, heart disease, and neurodegenerative disorders, such as Alzheimer's (AD) and Parkinson's diseases (PD). In the present study, we report that the treatment of activated microglia with resveratrol after prolonged exposure to lipopolysaccharide is not only able to modulate pro-inflammatory responses, but it also up-regulates the expression of decoy receptors, IL-1R2 and ACKR2 (atypical chemokine receptors), also known as negative regulatory receptors, which are able to reduce the functional responses promoting the resolution of inflammation. This result might constitute a hitherto unknown anti-inflammatory mechanism exerted by resveratrol on activated microglia.


Assuntos
Lipopolissacarídeos , Microglia , Resveratrol/metabolismo , Lipopolissacarídeos/metabolismo , Microglia/metabolismo , Citocinas/metabolismo , Anti-Inflamatórios/metabolismo
4.
Int J Mol Sci ; 23(21)2022 Oct 26.
Artigo em Inglês | MEDLINE | ID: mdl-36361750

RESUMO

In recent years, there has been considerable research showing that coffee consumption seems to be beneficial to human health, as it contains a mixture of different bioactive compounds such as chlorogenic acids, caffeic acid, alkaloids, diterpenes and polyphenols. Neurodegenerative diseases (NDs) are debilitating, and non-curable diseases associated with impaired central, peripheral and muscle nervous systems. Several studies demonstrate that neuroinflammation mediated by glial cells-such as microglia and astrocytes-is a critical factor contributing to neurodegeneration that causes the dysfunction of brain homeostasis, resulting in a progressive loss of structure, function, and number of neuronal cells. This happens over time and leads to brain damage and physical impairment. The most known chronic NDs are represented by Alzheimer's disease (AD), Parkinson's disease (PD), multiple sclerosis (MS), amyotrophic lateral sclerosis (ALS) and Huntington's disease (HD). According to epidemiological studies, regular coffee consumption is associated with a lower risk of neurodegenerative diseases. In this review, we summarize the latest research about the potential effects of caffeine in neurodegenerative disorders prevention and discuss the role of controlled caffeine delivery systems in maintaining high plasma caffeine concentrations for an extended time.


Assuntos
Doenças Neurodegenerativas , Humanos , Cafeína/farmacologia , Café , Doenças Neurodegenerativas/etiologia , Doenças Neuroinflamatórias
5.
Nutrients ; 14(3)2022 Feb 05.
Artigo em Inglês | MEDLINE | ID: mdl-35277035

RESUMO

Spirulina is a microscopic, filamentous cyanobacterium that grows in alkaline water bodies. It is extensively utilized as a nutraceutical food supplement all over the world due to its high levels of functional compounds, such as phycocyanins, phenols and polysaccharides, with anti-inflammatory, antioxidant, immunomodulating properties both in vivo and in vitro. Several scientific publications have suggested its positive effects in various pathologies such as cardiovascular diseases, hypercholesterolemia, hyperglycemia, obesity, hypertension, tumors and inflammatory diseases. Lately, different studies have demonstrated the neuroprotective role of Spirulina on the development of the neural system, senility and a number of pathological conditions, including neurological and neurodegenerative diseases. This review focuses on the role of Spirulina in the brain, highlighting how it exerts its beneficial anti-inflammatory and antioxidant effects, acting on glial cell activation, and in the prevention and/or progression of neurodegenerative diseases, in particular Parkinson's disease, Alzheimer's disease and Multiple Sclerosis; due to these properties, Spirulina could be considered a potential natural drug.


Assuntos
Spirulina , Anti-Inflamatórios/farmacologia , Antioxidantes/farmacologia , Antioxidantes/uso terapêutico , Encéfalo , Suplementos Nutricionais
6.
Molecules ; 27(2)2022 Jan 06.
Artigo em Inglês | MEDLINE | ID: mdl-35056657

RESUMO

Inflammaging is a term used to describe the tight relationship between low-grade chronic inflammation and aging that occurs during physiological aging in the absence of evident infection. This condition has been linked to a broad spectrum of age-related disorders in various organs including the brain. Inflammaging represents a highly significant risk factor for the development and progression of age-related conditions, including neurodegenerative diseases which are characterized by the progressive dysfunction and degeneration of neurons in the brain and peripheral nervous system. Curcumin is a widely studied polyphenol isolated from Curcuma longa with a variety of pharmacologic properties. It is well-known for its healing properties and has been extensively used in Asian medicine to treat a variety of illness conditions. The number of studies that suggest beneficial effects of curcumin on brain pathologies and age-related diseases is increasing. Curcumin is able to inhibit the formation of reactive-oxygen species and other pro-inflammatory mediators that are believed to play a pivotal role in many age-related diseases. Curcumin has been recently proposed as a potential useful remedy against neurodegenerative disorders and brain ageing. In light of this, our current review aims to discuss the potential positive effects of Curcumin on the possibility to control inflammaging emphasizing the possible modulation of inflammaging processes in neurodegenerative diseases.


Assuntos
Envelhecimento , Anti-Inflamatórios não Esteroides/farmacologia , Encéfalo/efeitos dos fármacos , Curcumina/farmacologia , Inflamação/tratamento farmacológico , Microglia/efeitos dos fármacos , Doenças Neurodegenerativas/tratamento farmacológico , Animais , Encéfalo/imunologia , Encéfalo/patologia , Humanos , Inflamação/imunologia , Inflamação/patologia , Microglia/imunologia , Microglia/patologia , Doenças Neurodegenerativas/imunologia , Doenças Neurodegenerativas/patologia
7.
Nutrients ; 13(5)2021 Apr 23.
Artigo em Inglês | MEDLINE | ID: mdl-33922475

RESUMO

Among therapeutic approaches that have been investigated, targeting of receptors implicated in managing neuroinflammation has been described. One such family of receptors comprises the formyl peptide receptors (FPRs) whose ligands could play a role in host defense. The murine FPR gene family includes at least six members while in humans there are only three. The two most important members are the Fpr1 and Fpr2. Fpr1encodes murine FPR1, which is considered the murine orthologue of human FPR. Resveratrol, a non-flavonoid polyphenol rich in red wine and grapes, apart from its beneficial health effects and anti-inflammatory properties, has been reported to reduce neuroinflammation in different neurodegenerative disease models. Resveratrol anti-inflammatory responses involve the activation of the protein deacetylase sirtuin 1 (SIRT1) gene. In this work we have investigated in an LPS-based murine model of neuroinflammation the role of FPR1, examining not only if this receptor undergoes a reduction of its expression during neuroinflammation, but also whether treatment with resveratrol was able to modulate its expression leading to an amelioration of neuroinflammatory picture in a murine model of neuroinflammation. Results of this work showed that FPR1 together with SIRT1 resulted upregulated by resveratrol treatment and that this increase is associated with an amelioration of the neuroinflammatory picture, as demonstrated by the induction of IL-10 and IL1-RA expression and the downregulation of proinflammatory mediators, such as TNF-α and IL-1ß. The expression and the modulation of FPR1 by resveratrol may be evaluated in order to propose a novel anti-inflammatory and pro-resolving therapeutic approach for the reduction of the detrimental effects associated with neuro-inflammation based neurodegenerative diseases and also as a promising strategy to promote human health by a diet rich in antioxidative bioactive compounds.


Assuntos
Astrócitos/patologia , Inflamação/metabolismo , Inflamação/patologia , Microglia/patologia , Receptores de Formil Peptídeo/metabolismo , Resveratrol/farmacologia , Animais , Anti-Inflamatórios/farmacologia , Astrócitos/efeitos dos fármacos , Astrócitos/metabolismo , Proteínas de Ligação ao Cálcio/genética , Proteínas de Ligação ao Cálcio/metabolismo , Modelos Animais de Doenças , Proteína Glial Fibrilar Ácida/metabolismo , Inflamação/induzido quimicamente , Mediadores da Inflamação/metabolismo , Proteína Antagonista do Receptor de Interleucina 1/metabolismo , Lipopolissacarídeos , Masculino , Camundongos , Proteínas dos Microfilamentos/genética , Proteínas dos Microfilamentos/metabolismo , Microglia/efeitos dos fármacos , Microglia/metabolismo , Modelos Biológicos , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Transdução de Sinais , Sirtuína 1/genética , Sirtuína 1/metabolismo , Fator de Necrose Tumoral alfa/genética , Fator de Necrose Tumoral alfa/metabolismo
8.
Comput Biol Chem ; 86: 107251, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32224443

RESUMO

The mitochondrial solute carrier genes (SLC25) are highly conserved during vertebrate evolution. In most SLC25 genes of zebrafish, chicken, mouse, and human, the introns are located at exactly superimposable positions. In these topographically corresponding introns we studied the composition of the initial and terminal hexanucleotides (5'ss and 3'ss) which are instrumental in splicing signaling, focusing on the evolutionary conservation/mutation dynamics of these genetically related sequences. At each position, the per cent conservation of zebrafish individual nucleotides in chicken, mouse and human is proportional to their percent frequency in zebrafish; furthermore, nucleotide mutations are biased in favor of the more represented nucleotides, thus compensating for those highly represented zebrafish nucleotides which have not been conserved. As a result of these evolutionary dynamics, the general nucleotide composition at each position has remained relatively conserved throughout vertebrates. At 5'ss, following the canonical GT, A and G are largely prevailing at position +3, A at +4 and G at +5 (GT[A/G]AGx). At 3'ss, T and C are largely prevailing at positions -6, -5 and -3, preceding the canonical intron terminal AG ([C/T] [C/T]x[C/T]AG). However, the actual composition of the tetranucleotides at 5' and 3' often does not conform to the above scheme. At 5'ss the more canonical sequence is completely expressed in 63% of cases and partially (2 or 1 matches) in 37 % of cases. At 3'ss the more canonical sequence is completely expressed in 71 % of cases and partially (2 or 1 matches) in 29 % of cases. The nucleotide conservation loss (nucleotide mutation) is higher in the evolution from fish to the last common ancestor of birds and mammals (58 %), then diminishes in the successive evolution steps up to the mammalian common ancestor (10 %), and becomes still lower at the divergence of rodents and primates (5 %).


Assuntos
Proteínas Mitocondriais/genética , Transportadores de Ânions Orgânicos/genética , Splicing de RNA , Animais , Sequência de Bases , Galinhas , Sequência Conservada , Evolução Molecular , Humanos , Íntrons , Camundongos , Sítios de Splice de RNA , Peixe-Zebra
9.
Biochimie ; 154: 25-34, 2018 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-30076902

RESUMO

The mitochondrial S-adenosylmethionine carrier (SAMC), encoded by the SLC25A26 gene, catalyzes the uptake of S-adenosylmethionine (SAM) from the cytosol into mitochondria in exchange for S-adenosylhomocysteine (SAH), produced inside the mitochondria. In the last years we have been functionally characterizing the promoter of SLC25A26 gene. In this study we show that a silencer activity is present in the region from -756 bp to -504 bp, which specifically binds a protein present in Caski cells nuclear extracts. By in silico analysis, EMSA, ChIP, overexpressing and silencing experiments this protein was identified as FOXD3 which acts as a repressor of SLC25A26 expression. Interestingly, the repressor activity of FOXD3 is completely abolished by treating Caski cells with folate via a mechanism that involves methylation of FOXD3 gene promoter. This finding could have important impact in cancer cells where SLC25A26 is downregulated. Finally, the DPE and INR putative sites were also identified.


Assuntos
Sistemas de Transporte de Aminoácidos/biossíntese , Proteínas de Ligação ao Cálcio/biossíntese , Fatores de Transcrição Forkhead/metabolismo , Regulação Neoplásica da Expressão Gênica , Proteínas Mitocondriais/biossíntese , Proteínas de Neoplasias/metabolismo , Proteínas Repressoras/metabolismo , Sistemas de Transporte de Aminoácidos/genética , Células CACO-2 , Proteínas de Ligação ao Cálcio/genética , Fatores de Transcrição Forkhead/genética , Células Hep G2 , Humanos , Proteínas Mitocondriais/genética , Proteínas de Neoplasias/genética , Proteínas Repressoras/genética
10.
J Genet ; 97(1): 225-233, 2018 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-29666342

RESUMO

The DNA sequence corresponding to the second exon of the SLC25A3 gene is duplicated in vertebrates. The second exon codes for the first transmembrane segment and parts of the immediately adjoining intermembrane and mitochondrial matrix segments. The two genomic exon 2 sequences are 84% similar in zebrafish (slc25a3b gene), 70% in chicken, 66% in mouse and 67% in human. The amino acid identity is 86% in zebrafish, 77% in chicken and 70% in mouse and human. The two copies of exon 2 are separated by an intronic interval. Translation of both exon 2 sequences would alter the reading frame of the downstream sequence, generating a modified aa sequence which would soon be truncated by a stop codon. As a matter of fact the splicing machinery is tuned in such a way that in some species only one of the two copies is expressed and the other is spliced out, while in other species both copies are expressed but only one at a time, generating two alternative protein products.


Assuntos
Proteínas de Transporte de Fosfato/química , Proteínas de Transporte de Fosfato/genética , Splicing de RNA/genética , Vertebrados/genética , Sequência de Aminoácidos , Animais , Sequência de Bases , Galinhas/genética , Humanos , Camundongos , Peptídeos/química , Proteínas de Transporte de Fosfato/metabolismo , Especificidade da Espécie , Peixe-Zebra/genética
11.
Neurosci Bull ; 34(2): 270-282, 2018 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-29124672

RESUMO

In this study, the effects of Radio Electric Asymmetric Conveyer (REAC), a non-invasive physical treatment, on neuroinflammatory responses in a mouse model of parkinsonism induced by intoxication with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP), were investigated in vivo. We found that the REAC tissue optimization treatment specific for neuro-regenerative purposes (REAC TO-RGN-N) attenuated the inflammatory picture evoked by MPTP-induced nigro-striatal damage in mice, decreasing the levels of pro-inflammatory molecules and increasing anti-inflammatory mediators. Besides, there was a significant reduction of both astrocyte and microglial activation in MPTP-treated mice exposed to REAC TO-RGN-N. These results indicated that REAC TO-RGN-N treatment modulates the pro-inflammatory responses and reduces neuronal damage in MPTP-induced parkinsonism.


Assuntos
Corpo Estriado/patologia , Estimulação Elétrica/métodos , Transtornos Parkinsonianos/patologia , Animais , Inflamação/patologia , Masculino , Camundongos , Degeneração Neural/patologia , Regeneração Nervosa/fisiologia
12.
Clin Exp Med ; 18(2): 251-261, 2018 May.
Artigo em Inglês | MEDLINE | ID: mdl-29218444

RESUMO

Apoptosis is essential for maintaining tissue homoeostasis in multi-cellular organisms, also occurring as a defence mechanism against a number of infectious agents, such as parasites. Among intracellular protozoan parasites reported to interfere with the apoptotic machinery of the host cell, Leishmania (L.) sp. have been described, although the various species might activate different pathways in their host cells. Since until now it is not yet well clarified the signalling pathway involved in the apoptosis modulation by L. infantum, the aim of this work was to investigate the role of the anti-apoptotic protein, Bcl-2, and the inhibitors of apoptosis IAP1/2 (cIAP1/2) in cell death resistance showed in L. infantum-infected human macrophages. We observed that actinomycin D-induced apoptosis in U-937 cells, evaluated by Annexin V-CY3, DNA fragmentation and caspase-3, caspase-8, caspase-9 activation assays, was inhibited in the presence of L. infantum promastigotes and that, in these conditions, Bcl-2 protein expression resulted significantly upregulated. Interestingly, L. infantum infection in combination with the Bcl-2 inhibitor, ABT-737, significantly increased the apoptotic process in actinomycin D-treated cells, suggesting a role for Bcl-2 in the anti-apoptotic regulation of human macrophages induced by L. infantum infection. Moreover, Western blotting analysis demonstrated not only a significantly upregulation of cIAP1/2 in infected U-937 cells, but also that the inhibition of cIAPs, employing specific siRNAs, restored the apoptotic effect of actinomycin in infected macrophages. These results clearly support the hypothesis that Bcl-2 and cIAPs are strongly involved in the anti-apoptotic action played by L. infantum in human macrophages.


Assuntos
Proteína 3 com Repetições IAP de Baculovírus/metabolismo , Proteínas Inibidoras de Apoptose/metabolismo , Leishmania infantum/patogenicidade , Macrófagos/citologia , Proteínas Proto-Oncogênicas c-bcl-2/metabolismo , Ubiquitina-Proteína Ligases/metabolismo , Apoptose , Compostos de Bifenilo/farmacologia , Linhagem Celular , Dactinomicina/farmacologia , Resistência à Doença , Regulação da Expressão Gênica/efeitos dos fármacos , Humanos , Macrófagos/metabolismo , Macrófagos/parasitologia , Nitrofenóis/farmacologia , Piperazinas/farmacologia , Sulfonamidas/farmacologia
13.
FEBS J ; 284(6): 967-984, 2017 03.
Artigo em Inglês | MEDLINE | ID: mdl-28118529

RESUMO

Cancer cells down-regulate different genes to give them a selective advantage in invasiveness and/or metastasis. The SLC25A26 gene encodes the mitochondrial carrier that catalyzes the import of S-adenosylmethionine (SAM) into the mitochondrial matrix, required for mitochondrial methylation processes, and is down-regulated in cervical cancer cells. In this study we show that SLC25A26 is down-regulated due to gene promoter hypermethylation, as a mechanism to promote cell survival and proliferation. Furthermore, overexpression of SLC25A26 in CaSki cells increases mitochondrial SAM availability and promotes hypermethylation of mitochondrial DNA, leading to decreased expression of key respiratory complex subunits, reduction of mitochondrial ATP and release of cytochrome c. In addition, increased SAM transport into mitochondria leads to impairment of the methionine cycle with accumulation of homocysteine at the expense of glutathione, which is strongly reduced. All these events concur to arrest the cell cycle in the S phase, induce apoptosis and enhance chemosensitivity of SAM carrier-overexpressing CaSki cells to cisplatin.


Assuntos
Sistemas de Transporte de Aminoácidos/biossíntese , Proteínas de Ligação ao Cálcio/biossíntese , Citocromos c/biossíntese , DNA Mitocondrial/genética , Resistencia a Medicamentos Antineoplásicos/genética , Neoplasias do Colo do Útero/genética , Trifosfato de Adenosina/metabolismo , Sistemas de Transporte de Aminoácidos/genética , Apoptose/genética , Proteínas de Ligação ao Cálcio/genética , Ciclo Celular/genética , Linhagem Celular Tumoral , Proliferação de Células/genética , Cisplatino/administração & dosagem , Citocromos c/genética , Metilação de DNA/genética , DNA Mitocondrial/metabolismo , Feminino , Regulação Neoplásica da Expressão Gênica , Glutationa/metabolismo , Humanos , Metionina/metabolismo , Mitocôndrias/efeitos dos fármacos , Mitocôndrias/genética , Regiões Promotoras Genéticas , S-Adenosilmetionina/metabolismo , Neoplasias do Colo do Útero/metabolismo , Neoplasias do Colo do Útero/patologia
14.
Mediators Inflamm ; 2016: 5240127, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27738387

RESUMO

We investigated the ability of folic acid to modulate the inflammatory responses of LPS activated BV-2 microglia cells and the signal transduction pathways involved. To this aim, the BV-2 cell line was exposed to LPS as a proinflammatory response inducer, in presence or absence of various concentrations of folic acid. The production of nitric oxide (NO) was determined by the Griess test. The levels of tumor necrosis factor-alpha (TNF-α), interleukin-1 beta (IL-1ß), and IL-10 were determined by ELISA. Inducible NO synthase (iNOS), nuclear transcription factor-kappa B (NF-κB) p65, MAPKs protein, and suppressors of cytokine signaling (SOCS)1 and SOCS3 were analyzed by western blotting. TNF-α and IL-1ß, as well as iNOS dependent NO production, resulted significantly inhibited by folic acid pretreatment in LPS-activated BV-2 cells. We also observed that folic acid dose-dependently upregulated both SOCS1 and SOCS3 expression in BV-2 cells, leading to an increased expression of the anti-inflammatory cytokine IL-10. Finally, p-IκBα, which indirectly reflects NF-κB complex activation, and JNK phosphorylation resulted dose-dependently downregulated by folic acid pretreatment of LPS-activated cells, whereas p38 MAPK phosphorylation resulted significantly upregulated by folic acid treatment. Overall, these results demonstrated that folic acid was able to modulate the inflammatory response in microglia cells, shifting proinflammatory versus anti-inflammatory responses through regulating multiple signaling pathways.


Assuntos
Ácido Fólico/farmacologia , Inflamação/metabolismo , Lipopolissacarídeos/farmacologia , Animais , Linhagem Celular , Sobrevivência Celular/efeitos dos fármacos , Ensaio de Imunoadsorção Enzimática , Interleucina-10/metabolismo , Interleucina-1beta/metabolismo , Camundongos , Microglia/efeitos dos fármacos , Microglia/metabolismo , NF-kappa B/metabolismo , Óxido Nítrico/metabolismo , Óxido Nítrico Sintase Tipo II/metabolismo , Transdução de Sinais/efeitos dos fármacos , Proteína 1 Supressora da Sinalização de Citocina/metabolismo , Proteína 3 Supressora da Sinalização de Citocinas/metabolismo , Fator de Necrose Tumoral alfa/metabolismo
15.
Int Immunopharmacol ; 36: 282-290, 2016 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-27208432

RESUMO

Microglia are resident macrophages in the central nervous system (CNS) deputed to defend against pathogens. Persistent or acute inflammation of microglia leads to CNS disorders, so regulation of pro-inflammatory responses of microglial cells is thought to be a promising therapeutic strategy to attenuate abnormal inflammatory responses observed in neurodegenerative disease. We hypothesized that curcumin supplementation could reduce the inflammatory responses of activated microglial cells modulating PI3K/Akt pathway. Different curcumin concentrations were administered as BV-2 microglia pre-treatment 1h prior to LPS stimulation. Nitric oxide (NO) and inducible nitric oxide synthase (iNOS) expression were determined by Griess reagent and western blotting, respectively. Inflammatory cytokines release was evaluated by ELISA and qRT-PCR. PI3K/Akt expression was analyzed by western blotting analysis. Curcumin significantly attenuated, in a dose-dependent manner, LPS-induced release of NO and pro-inflammatory cytokines, as well as iNOS expression. Interestingly, curcumin was able to reduce, again in a dose-dependent manner, PI3K/Akt phosphorylation as well as NF-κB activation in LPS-activated microglial cells. Overall these results suggest that curcumin plays an important role in the attenuation of LPS-induced inflammatory responses in microglial cells and that the mechanisms involve down-regulation of the PI3K/Akt signalling.


Assuntos
Anti-Inflamatórios/farmacologia , Curcumina/farmacologia , Microglia/efeitos dos fármacos , Proteína Oncogênica v-akt/metabolismo , Fosfatidilinositol 3-Quinases/metabolismo , Animais , Linhagem Celular , Citocinas/metabolismo , Regulação para Baixo , Mediadores da Inflamação/metabolismo , Lipopolissacarídeos/imunologia , Camundongos , Microglia/imunologia , Óxido Nítrico/metabolismo , Óxido Nítrico Sintase Tipo II/genética , Óxido Nítrico Sintase Tipo II/metabolismo , Transdução de Sinais/efeitos dos fármacos
16.
Food Chem ; 210: 276-85, 2016 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-27211648

RESUMO

In this study the effects of commercial bovine and soybean milks and their bioactive compounds, namely genistein, daidzein and equol, on the inflammatory responses induced by lipopolysaccharide (LPS) treatment of human intestinal Caco-2 cells were examined, in terms of nitric oxide (NO) release and inducible nitric oxide synthetase (iNOS) expression. Both milks and their bioactive compounds significantly inhibited, dose-dependently, the expression of iNOS mRNA and protein, resulting in a decreased NO production. The NF-κB activation in LPS-stimulated intestinal cells was also examined. In all cases we observed that cell pre-treatment before LPS activation inhibited the IkB phosphorylation. Accordingly, quantification of bioactive compounds by solid phase microextraction coupled with liquid chromatography has shown that they were absorbed, metabolized and released by Caco-2 cells in culture media. In conclusion, we demonstrated that milks and compounds tested are able to reduce LPS-induced inflammatory responses from intestinal cells, interfering with NF-kB dependent molecular mechanisms.


Assuntos
Células Epiteliais/efeitos dos fármacos , Glycine max/metabolismo , Inflamação/metabolismo , Leite/metabolismo , Animais , Células CACO-2 , Bovinos , Células Epiteliais/metabolismo , Equol/farmacologia , Expressão Gênica/genética , Genisteína/farmacologia , Humanos , Isoflavonas/farmacologia , Lipopolissacarídeos/farmacologia , NF-kappa B/metabolismo , Óxido Nítrico/metabolismo , Óxido Nítrico Sintase Tipo II/genética , Óxido Nítrico Sintase Tipo II/metabolismo , Fosforilação/efeitos dos fármacos , Transdução de Sinais/efeitos dos fármacos
17.
Toxicol In Vitro ; 28(6): 1126-35, 2014 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-24882063

RESUMO

Brain damage or exposure to inflammatory agents provokes the activation of microglia and secretion of pro-inflammatory and neurotoxic mediators responsible for neuronal loss. Several lines of evidence show that resveratrol, a natural non-flavonoid polyphenol, may exert a neuroprotective action in neurodegenerative diseases. Suppressor of cytokine signaling (SOCS) proteins are a family of eight members expressed by immune cells and the central nervous system (CNS) cells, that regulate immune processes within the CNS, including microglia activation. We demonstrate that resveratrol had anti-inflammatory effects in murine N13 microglial cells stimulated with lipopolysaccharide (LPS), through up-regulating SOCS-1 expression. Interestingly, in SOCS-1-silenced cells resveratrol failed to play a protective role after LPS treatment. Our data demonstrate that resveratrol can impair microglia activation by activating a SOCS-1 mediated signaling pathway.


Assuntos
Anti-Inflamatórios/farmacologia , Inflamação/metabolismo , Estilbenos/farmacologia , Proteínas Supressoras da Sinalização de Citocina/metabolismo , Animais , Linhagem Celular , Sobrevivência Celular/efeitos dos fármacos , Lipopolissacarídeos , Camundongos , Microglia , Óxido Nítrico/metabolismo , RNA Interferente Pequeno/administração & dosagem , Espécies Reativas de Oxigênio/metabolismo , Resveratrol , Transdução de Sinais/efeitos dos fármacos , Superóxidos/metabolismo , Proteína 1 Supressora da Sinalização de Citocina , Proteínas Supressoras da Sinalização de Citocina/genética
18.
Toxicol In Vitro ; 26(7): 1122-8, 2012 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-22771391

RESUMO

Resveratrol is a natural phytoalexin present in a variety of plant species, such as grapes and red wine, that is well known for its anti-inflammatory effects. In addition, a cancer chemotherapeutic activity of resveratrol has been described. Here we evaluated the effect of resveratrol on COX-2 and prostaglandin E(2) production in human intestinal cells Caco-2 cells treated with lipopolysaccharide (LPS). Resveratrol concentration-dependently inhibited the expression of COX-2 mRNA in the LPS-treated cells, as well as protein expression, resulting in a decreased production of PGE(2). In order to investigate the mechanisms through which resveratrol exhibited these anti-inflammatory effects, we examined the activation of IκB in LPS-stimulated intestinal cells. Results demonstrated that resveratrol inhibited the translocation of NF-κB p65 subunits from the cytosol to the nucleus, which correlated with its inhibitory effects on IκBα phosphorylation and degradation. These results suggest that the down-regulation of COX-2 and PGE(2) by resveratrol may be related to NF-κB inhibition through the negative regulation of IKK phosphorylation in intestinal cells.


Assuntos
Antioxidantes/farmacologia , Ciclo-Oxigenase 2/metabolismo , Dinoprostona/metabolismo , Enterócitos/efeitos dos fármacos , NF-kappa B/efeitos dos fármacos , Estilbenos/farmacologia , Células CACO-2 , Linhagem Celular , Sobrevivência Celular/efeitos dos fármacos , Células Cultivadas , Ciclo-Oxigenase 2/genética , Dinoprostona/genética , Regulação para Baixo/efeitos dos fármacos , Enterócitos/metabolismo , Enterócitos/patologia , Regulação Enzimológica da Expressão Gênica/efeitos dos fármacos , Humanos , Lipopolissacarídeos/farmacologia , NF-kappa B/biossíntese , Resveratrol
19.
Immunopharmacol Immunotoxicol ; 34(5): 858-65, 2012 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-22397361

RESUMO

Upregulation of inflammatory responses in the brain is associated with a number of neurodegenerative diseases. Microglia are activated in neurodegenerative diseases, producing pro-inflammatory mediators. Critically, lipopolysaccharide (LPS)-induced microglial activation causes dopaminergic neurodegeneration in vitro and in vivo. The signaling mechanisms triggered by LPS to stimulate the release of pro-inflammatory mediators in microglial cells are still incompletely understood. To further explore the mechanisms of LPS-mediated inflammatory response of microglial cells, we studied the role of phosphatidylinositol 3-kinase (PI3K)/Akt signal transduction pathways known to be activated by toll-like receptor-4 signaling through LPS. In the current study, we report that the activation profile of LPS-induced pAkt activation preceded those of LPS-induced NF-κB activation, suggesting a role for PI3K/Akt in the pathway activation of NF-κB-dependent inflammatory responses of activated microglia. These results, providing the first evidence that PI3K dependent signaling is involved in the inflammatory responses of microglial cells following LPS stimulation, may be useful in preventing inflammatory based neurodegenerative processes.


Assuntos
Lipopolissacarídeos/toxicidade , Microglia/metabolismo , Fosfatidilinositol 3-Quinases/metabolismo , Proteínas Proto-Oncogênicas c-akt/metabolismo , Transdução de Sinais/efeitos dos fármacos , Animais , Células Cultivadas , Embrião de Galinha , Microglia/patologia , NF-kappa B/metabolismo , Doenças Neurodegenerativas/metabolismo , Receptor 4 Toll-Like/metabolismo
20.
Br J Nutr ; 108(9): 1623-32, 2012 Nov 14.
Artigo em Inglês | MEDLINE | ID: mdl-22251620

RESUMO

Resveratrol, a polyphenol abundantly found in grapes and red wine, exhibits beneficial health effects due to its anti-inflammatory properties. In the present study, we evaluated the effect of resveratrol on inflammatory responses induced by lipopolysaccharide (LPS) treatment of human intestinal Caco-2 and SW480 cell lines. In the LPS-treated intestinal cells, resveratrol dose-dependently inhibited the expression of inducible NO synthase (iNOS) mRNA as well as protein expression, resulting in a decreased production of NO. In addition, Toll-like receptor-4 expression was significantly diminished in LPS-stimulated cells after resveratrol pre-treatment. To investigate the mechanisms by which resveratrol reduces NO production and iNOS expression, we examined the activation of inhibitor of κB (IκB) in LPS-stimulated intestinal cells. Results demonstrated that resveratrol inhibited the phosphorylation, as well as the degradation, of the IκB complex. Overall, these results show that resveratrol is able to reduce LPS-induced inflammatory responses by intestinal cells, interfering with the activation of NF-κB-dependent molecular mechanisms.


Assuntos
Anti-Inflamatórios não Esteroides/metabolismo , Antineoplásicos Fitogênicos/metabolismo , Neoplasias do Colo/metabolismo , Enterócitos/metabolismo , Doenças Inflamatórias Intestinais/metabolismo , NF-kappa B/antagonistas & inibidores , Estilbenos/metabolismo , Anti-Inflamatórios não Esteroides/efeitos adversos , Anti-Inflamatórios não Esteroides/uso terapêutico , Antineoplásicos Fitogênicos/efeitos adversos , Antineoplásicos Fitogênicos/uso terapêutico , Células CACO-2 , Linhagem Celular Tumoral , Sobrevivência Celular , Neoplasias do Colo/imunologia , Neoplasias do Colo/patologia , Neoplasias do Colo/prevenção & controle , Suplementos Nutricionais/efeitos adversos , Regulação para Baixo , Enterócitos/citologia , Enterócitos/imunologia , Enterócitos/patologia , Humanos , Proteínas I-kappa B/metabolismo , Doenças Inflamatórias Intestinais/dietoterapia , Doenças Inflamatórias Intestinais/imunologia , Doenças Inflamatórias Intestinais/patologia , Lipopolissacarídeos , NF-kappa B/metabolismo , Óxido Nítrico/metabolismo , Óxido Nítrico Sintase Tipo II/genética , Óxido Nítrico Sintase Tipo II/metabolismo , Fosforilação , Processamento de Proteína Pós-Traducional , Proteólise , RNA Mensageiro/metabolismo , Resveratrol , Estilbenos/efeitos adversos , Estilbenos/uso terapêutico , Receptor 4 Toll-Like/genética , Receptor 4 Toll-Like/metabolismo
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