RESUMEN
Cynandione A (CA), isolated from ethyl acetate extract of Cynanchum wilfordii (CW), is a bioactive phytochemical that has been found to be beneficial for the treatment of several diseases. Hepatic de novo lipogenesis is one of the main causes of non-alcoholic fatty liver disease (NAFLD), which is thought to be a hepatic manifestation of certain metabolic syndromes. However, it has not yet been reported if CA has any therapeutic value in these diseases. Here, we investigated whether CA can inhibit hepatic lipogenesis induced by liver X receptor α (LXRα) using an in vitro model. We found that the extract and ethyl acetated layer of CW decreased the mRNA levels of sterol regulatory element-binding protein-1c (SREBP-1c), which plays a crucial role in hepatic lipogenesis. Additionally, we observed that CA could suppress the level of SREBP-1c, which was increased using two commercial LXRα agonists, GW3954 and T0901317. Moreover, the enzymes that act downstream of SREBP-1c were also inhibited by CA treatment. To understand the mechanism underlying this effect, the levels of phosphorylated AMP kinase (pAMPK) were measured after CA treatment. Therefore, CA might increase the pAMPK level by inducing phosphorylation of liver kinase B1 (LKB1), which can then convert AMPK to pAMPK. Taken together, we conclude that CA has an alleviative effect on hepatic lipogenesis through the stimulation of the LKB1/AMPK pathway.
Asunto(s)
Proteínas Quinasas Activadas por AMP/metabolismo , Compuestos de Bifenilo/farmacología , Cynanchum/química , Lipogénesis/efectos de los fármacos , Proteínas Serina-Treonina Quinasas/metabolismo , Quinasas de la Proteína-Quinasa Activada por el AMP , Animales , Células Hep G2 , Humanos , Hidrocarburos Fluorados/farmacología , Hígado/efectos de los fármacos , Receptores X del Hígado/metabolismo , Enfermedad del Hígado Graso no Alcohólico/tratamiento farmacológico , Fosforilación , Fitoquímicos/farmacología , Extractos Vegetales/farmacología , Proteína 1 de Unión a los Elementos Reguladores de Esteroles/genética , Sulfonamidas/farmacologíaRESUMEN
Owing to the development of information technology and the electronics industry, and the increase in the use of electronic products, an increasing number of people are exposed to electromagnetic fields (EMFs) in daily life. There has been concern about the effects of EMFs on the human body. Th9 cells, which are characterized by the generation of interleukin-(IL-9), are a recently defined subset of T helper (Th) cells. In this study, we investigated the effect of extremely low-frequency (60 Hz) EMFs, such as those generated by household power sources, at 0.8 mT intensity on CD4+ T cells. The exposure of CD4+ T cells to such EMFs under Th9-polarizing conditions increased IL-9 secretion and gene expression of transcription factors that are important for Th9 development. The expression of GATA3 increased in the early stage, and the phosphorylation of STAT5 and STAT6, which regulate the expression of GATA3, increased. In addition, EMFs increased the expression of IL-2 by the T cells. In conclusion, the differentiation of CD4+ T cells to the Th9 phenotype was increased by exposure to extremely low-frequency EMFs, and this appeared to be dependent on the IL-2 signaling pathway. Furthermore, co-cultures of EMF-exposed Th9 cells and mast cells showed an increased expression of mast cell proteases, FcεR1α, and mast cell-derived inflammatory cytokines compared with co-cultures of non-EMF-exposed Th9 cells and mast cells. Our results suggest that EMFs enhance the differentiation of CD4+ T cells to the Th9 phenotype, resulting in mast cell activation and inflammation. Bioelectromagnetics. 2019;40:588-601. © 2019 Bioelectromagnetics Society.
Asunto(s)
Diferenciación Celular , Campos Electromagnéticos , Interleucina-2/metabolismo , Linfocitos T Colaboradores-Inductores/citología , Linfocitos T Colaboradores-Inductores/metabolismo , Animales , Línea Celular , Humanos , Masculino , Ratones Endogámicos C57BL , Transducción de SeñalRESUMEN
BACKGROUND: T helper 17 (Th17) cells, which are differentiated from CD4+ T cells, drive inflammation, leading to autoimmune diseases such as psoriasis, rheumatoid arthritis, and inflammatory bowel disease. Therefore, inhibiting Th17 polarization could be a therapeutic target for inflammatory diseases. PURPOSE: We investigated the inhibitory effect of Fraxinus rhynchophylla (Oleaceae) on Th17 differentiation and found its active component. STUDY DESIGN: The activity of F. rhynchophylla and its active constituent was verified using CD4+ cells extracted from C57BL/6 mice. METHODS: Micro-environment for Th17 polarization was provided to CD4+ cells and the effect of treatment with samples was measured by enzyme linked immunosorbent assay (ELISA), polymerase chain reaction (PCR), and Western blot. RESULTS: The extract of F. rhynchophylla Hance and its chemical constituent, α-amyrin acetate, which was isolated via bioassay-guided isolation, significantly inhibited Th17 polarization as revealed when interleukin (IL)-17, a characteristic cytokine produced by Th17 cells, was measured. Furthermore, the inhibitory effect of α-amyrin acetate was compared to the amyrin derivatives, α-amyrin and ß-amyrin. All displayed a suppressive effect on Th17 polarization and all reduced the expression of single transducer and activator of transcription 3 (STAT3) and retinoic acid receptor-related orphan receptor γt (RORγt), which are crucial transcription factors regulating Th17 differentiation. α-Amyrin acetate, however, exhibited the most prominent effects, which indicates that the functional group, acetate, might strengthen the inhibitory effect on Th17 differentiation. CONCLUSION: Taken together, these results suggest that the extract of F. rhynchophylla and its active constituent, α-amyrin acetate, could be applied as a potential therapeutic agent for autoimmune disorders such as rheumatoid arthritis.
Asunto(s)
Fraxinus/química , Ácido Oleanólico/análogos & derivados , Extractos Vegetales/farmacología , Células Th17/efectos de los fármacos , Animales , Linfocitos T CD4-Positivos/efectos de los fármacos , Diferenciación Celular/efectos de los fármacos , Polaridad Celular/efectos de los fármacos , Polaridad Celular/inmunología , Interleucina-17/genética , Interleucina-17/metabolismo , Masculino , Ratones Endogámicos C57BL , Miembro 3 del Grupo F de la Subfamilia 1 de Receptores Nucleares/genética , Miembro 3 del Grupo F de la Subfamilia 1 de Receptores Nucleares/metabolismo , Ácido Oleanólico/aislamiento & purificación , Ácido Oleanólico/farmacología , Extractos Vegetales/química , Factor de Transcripción STAT3/genética , Factor de Transcripción STAT3/metabolismoRESUMEN
Our study aimed to investigate the effects of the polysaccharide-rich extract of Phragmites rhizoma (PEP) against water immersion restraint (WIR) stress and forced swimming-induced fatigue. Exposure to WIR stress significantly increased the ulcer index, bleeding score, the weight of the adrenal gland, blood glucose concentrations, total cholesterol, cortisol, and creatine kinase (CK). The weight of the spleen decreased significantly. In addition, myeloperoxidase (MPO) and thiobarbituric acid-reactive substance (TBARS) were significantly upregulated by WIR stress. The antioxidative factors such as glutathione (GSH) and superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx) in the stomach were decreased by WIR stress. Alterations induced by WIR stress were effectively reversed by pretreatment with PEP. The swimming endurance capacity of mice was significantly prolonged by the oral administration of PEP. Swimming-induced fatigue significantly reduced the body weight; however, the injection of PEP inhibited the decrease of body weight. The PEP-treated group had significantly lower CK levels in plasma, an indicator of muscle damage. These results indicated that PEP has anti-stress and anti-fatigue effects, which are mediated by suppressing the hyperactivation of the hypothalamus-pituitary-adrenal axis, and antagonism of the oxidative damages induced by WIR stress and prolonged swimming times.
Asunto(s)
Fatiga/tratamiento farmacológico , Extractos Vegetales/administración & dosificación , Poaceae/química , Polisacáridos/administración & dosificación , Animales , Catalasa/metabolismo , Modelos Animales de Enfermedad , Fatiga/metabolismo , Fatiga/fisiopatología , Glutatión/metabolismo , Glutatión Peroxidasa/metabolismo , Humanos , Masculino , Ratones , Ratones Endogámicos ICR , Peroxidasa/metabolismo , Extractos Vegetales/química , Polisacáridos/química , Rizoma/química , Estrés Fisiológico/efectos de los fármacos , Superóxido Dismutasa/metabolismo , NataciónRESUMEN
The discovery of small-molecule regulators of microRNAs remains challenging, but a few have been reported. Herein, we describe small-molecule inhibitors of miR-31, a tumor-associated microRNA (miRNA), identified by high-throughput screening using a cell-based reporter assay. Aminosulfonylarylisoxazole compounds exhibited higher specificity for miR-31 than for six other miRNAs, i.e., miR-15a, miR-16, miR-21, miR-92a-1, miR-146a, and miR-155, and increased the expression of miR-31 target genes. The down-regulation of mature miR-31 was observed, while its precursor form increased following treatment with the compounds. Thus, the compounds may target the processing of pre-miR-31 into mature miR-31 and thereby inhibit the production of mature miR-31.
Asunto(s)
Isoxazoles/farmacología , MicroARNs/genética , MicroARNs/metabolismo , Materiales Biomiméticos/farmacología , Evaluación Preclínica de Medicamentos , Células HEK293 , Humanos , Isoxazoles/antagonistas & inhibidores , Células MCF-7 , Precursores del ARN/genética , Precursores del ARN/metabolismo , ARN Mensajero/genética , ARN Mensajero/metabolismo , Regulación hacia Arriba/efectos de los fármacos , Regulación hacia Arriba/genéticaRESUMEN
The arial parts of Scutellaria barbata D. Don (Lamiaceae) efficiently inhibited NO production in BV2 microglial cells, and the active constituents were further isolated based on activity-guided isolation using silica-gel column chromatography, RP-C18 MPLC and prep-HPLC. As the results, 2 flavonoids including 6-methoxynaringenin (1) and 6-O-methylscutellarein (5), and 6 neo-clerodane diterpenes such as scutebarbatine W (2), scutebatas B (3), scutebarbatine B (4), scutebarbatine A (6), 6-O-nicotinolylscutebarbatine G (7), and scutebarbatine X (8) were isolated. The structures of these compounds were elucidated based on NMR and MS data, and the comparison of literature values. All the compounds except compound 7 inhibited NO production efficiently with IC50 values of lower than 50 µm. Particularly, compounds 1 and 8 were the most efficient with IC50 values of 25.8 and 27.4 µm, respectively. This is the first report suggesting the potential of S. barbata on the reduction of neuroinflammation.
Asunto(s)
Óxido Nítrico/metabolismo , Scutellaria/química , Animales , Antiinflamatorios/química , Antiinflamatorios/aislamiento & purificación , Antiinflamatorios/farmacología , Línea Celular , Supervivencia Celular/efectos de los fármacos , Cromatografía en Gel , Cromatografía Líquida de Alta Presión , Lipopolisacáridos/toxicidad , Espectroscopía de Resonancia Magnética , Espectrometría de Masas , Ratones , Microglía/citología , Microglía/efectos de los fármacos , Microglía/metabolismo , Conformación Molecular , Componentes Aéreos de las Plantas/química , Componentes Aéreos de las Plantas/metabolismo , Extractos Vegetales/química , Scutellaria/metabolismoRESUMEN
The roots of Euphorbia kansui, which belong to the family Euphorbiaceae, have been used as a traditional medicine for the treatment of various diseases such as diabetes, ascites, and leukemia. Recently, it was reported that the methylene chloride fraction of E. kansui radix (EKC) regulated the differentiation of Th17 cells and alleviated the symptoms of Th17-related inflammatory bowel disease. Imiquimod (IMQ), a TLR7/8 agonist, has been used to induce psoriasis in a mouse model. In this study, we evaluated the effect of EKC in an IMQ-induced psoriasis model. EKC effectively inhibited the production of interleukin-17A and interferon-γ in vitro. On this basis, EKC was administered to an animal model of psoriasis. Acanthosis and the infiltration of inflammatory cells into the dermis were significantly reduced by EKC. EKC also inhibited the expression of IL-17A, IL-22, IL-23, IL-12, and RAR-related orphan receptor gamma t (RORγt) in the spleen, skin-draining lymph nodes, and the skin. Additionally, EKC inhibited the activity of dendritic cells but not that of keratinocytes. In conclusion, EKC ameliorated the symptoms of psoriasis through inhibition of Th17 differentiation and activation of dendritic cells. These effects are expected to be beneficial in the treatment and prevention of psoriasis.
Asunto(s)
Euphorbia/química , Extractos Vegetales/uso terapéutico , Psoriasis/tratamiento farmacológico , Aminoquinolinas , Animales , Diferenciación Celular/efectos de los fármacos , Proliferación Celular/efectos de los fármacos , Supervivencia Celular/efectos de los fármacos , Citocinas/efectos de los fármacos , Células Dendríticas/efectos de los fármacos , Imiquimod , Interferón gamma/efectos de los fármacos , Interleucina-17/metabolismo , Japón , Queratinocitos/efectos de los fármacos , Medicina Tradicional de Asia Oriental , Metanol/química , Ratones , Ratones Endogámicos BALB C , Fitoterapia , Extractos Vegetales/administración & dosificación , Raíces de Plantas/química , Psoriasis/inducido químicamente , Psoriasis/prevención & control , Transducción de Señal/efectos de los fármacosRESUMEN
In recent years, there has been a dramatic increase in the number and variety of electronic devices that emit electromagnetic waves. Because people live and work in close proximity to these pieces of electrical equipment, there is growing concern surrounding the destruction of homeostasis by electromagnetic field exposure. In the present study, the effects of 60 Hz 0.8 mT extremely low-frequency electromagnetic fields (ELF-EMF) on a macrophage cell line (RAW 264.7) were examined. Under defined ELF-EMF exposure conditions, the production of nitric oxide and pro-inflammatory cytokines, TNF-α, IL-1ß, and IL-6, were increased in RAW 264.7 cells and the expression of those genes was also upregulated. However, cell proliferation was not altered. Translocation of NF-κB (nuclear factor kappa B), molecules that act downstream of the pro-inflammatory cytokines, were increased to the nucleus under ELF-EMF exposure conditions. In addition, we found that ELF-EMF exposure elevated activation of nuclear factor of activated T cells (NFAT) 2, as well as positively affected the influx of calcium. Furthermore, with both the presence of a potent antioxidant (Resveratrol) and downregulation of the antioxidant-related gene Prx-1 (Peroxiredoxin-1), ELF-EMF was associated with higher inflammatory responses of macrophages. These results suggest that an ELF-EMF amplifies inflammatory responses through enhanced macrophage activation and can decrease the effectiveness of antioxidants. Bioelectromagnetics. 38:374-385, 2017. © 2017 Wiley Periodicals, Inc.
Asunto(s)
Antioxidantes/farmacología , Campos Electromagnéticos/efectos adversos , Animales , Citocinas/genética , Regulación hacia Abajo/efectos de los fármacos , Regulación hacia Abajo/efectos de la radiación , Técnicas de Silenciamiento del Gen , Proteínas de Homeodominio/genética , Proteínas de Homeodominio/metabolismo , Homeostasis/efectos de los fármacos , Homeostasis/efectos de la radiación , Inflamación/metabolismo , Ratones , FN-kappa B/metabolismo , Factores de Transcripción NFATC/metabolismo , Células RAW 264.7 , Resveratrol , Transducción de Señal/efectos de los fármacos , Transducción de Señal/efectos de la radiación , Estilbenos/farmacologíaRESUMEN
Picroside II isolated from Pseudolysimachion rotundum var. subintegrum has been used as traditional medicine to treat inflammatory diseases. In this study, we assessed whether picroside II has inhibitory effects on airway inflammation in a mouse model of house dust mite (HDM)-induced asthma. In the HDM-induced asthmatic model, picroside II significantly reduced inflammatory cell counts in the bronchoalveolar lavage fluid (BALF), the levels of total immunoglobulin (Ig) E and HDM-specific IgE and IgG1 in serum, airway inflammation, and mucus hypersecretion in the lung tissues. ELISA analysis showed that picroside II down-regulated the levels of Th2-related cytokines (including IL-4, IL-5, and IL-13) and asthma-related mediators, but it up-regulated Th1-related cytokine, IFNγ in BALF. Picroside II also inhibited the expression of Th2 type cytokine genes and the transcription factor GATA3 in the lung tissues of HDM-induced mice. Finally, we demonstrated that picroside II significantly decreased the expression of GATA3 and Th2 cytokines in developing Th2 cells, consistent with in vivo results. Taken together, these results indicate that picroside II has protective effects on allergic asthma by reducing GATA3 expression and Th2 cytokine bias.
Asunto(s)
Asma , Cinamatos/farmacología , Citocinas/inmunología , Factor de Transcripción GATA3/inmunología , Glucósidos Iridoides/farmacología , Pyroglyphidae , Células Th2 , Animales , Asma/inducido químicamente , Asma/inmunología , Asma/patología , Asma/prevención & control , Cinamatos/química , Cinamatos/aislamiento & purificación , Modelos Animales de Enfermedad , Femenino , Regulación de la Expresión Génica/efectos de los fármacos , Regulación de la Expresión Génica/inmunología , Glucósidos Iridoides/química , Glucósidos Iridoides/aislamiento & purificación , Pulmón/inmunología , Pulmón/patología , Ratones , Ratones Endogámicos BALB C , Células TH1/inmunología , Células TH1/patología , Células Th2/inmunología , Células Th2/patologíaRESUMEN
The inflammatory response protects our body from bacteria and tumors, but chronic inflammation driven by the persistent activation of macrophages can lead to serious adverse effects including gastrointestinal problems, cardiac disorders, and a sore throat. Part of the ongoing research is focused on searching for antiinflammatory compounds from natural sources, so we investigated the effects of hardy kiwis (Actinidia arguta, Lauraceae) stems on inflammation induced by lipopolysaccharide (LPS) in Raw 264.7 cells to test the hypothesis that antiinflammatory effects of A. arguta stems were exerted through the inhibition of the nuclear factor (NF)-κB pathway. The methanol extract of A. arguta (20 µg/mL) stems lowered nitric oxide production in LPS-stimulated Raw 264.7 cells by 40%. It was then partitioned with hexane, chloroform, ethyl acetate, butanol, and water based on the polarity of each compound. Among the 5 layers, the chloroform layer had the greatest inhibitory effect on LPS-stimulated nitric oxide production and inducible nitric oxide synthase mRNA expression in Raw 264.7 cells. However, the levels of prostaglandin E2 and cyclooxygease 2 were not altered. On the other hand, treatment of cells with the chloroform layer of A. arguta before LPS stimulation also reduced them RNA expression of proinflammatory cytokines including tumor necrosis factor α and interleukin 1ß. Nuclear translocation of NF-κB p50 and p65 subunits induced by LPS was also inhibited by treatment with the chloroform layer of A. arguta. This was accompanied with the reduced phosphorylation of mitogen-activated protein kinases including extracellular signal-regulated protein kinase 1/2, c-Jun N-terminal protein kinase, and p38. Taken together, these results suggest that chloroform layer of A. arguta exerted antiinflammatory effects by the inhibition of mitogen-activated protein kinase phosphorylation and nuclear translocation of NF-κB.
Asunto(s)
Actinidia/química , Lipopolisacáridos/efectos adversos , Macrófagos/efectos de los fármacos , FN-kappa B/metabolismo , Extractos Vegetales/farmacología , Animales , Antiinflamatorios/farmacología , Línea Celular Tumoral , Ciclooxigenasa 2/genética , Ciclooxigenasa 2/metabolismo , Dinoprostona/metabolismo , Regulación hacia Abajo , Inflamación/tratamiento farmacológico , Interleucina-1beta/genética , Interleucina-1beta/metabolismo , Interleucina-6/genética , Interleucina-6/metabolismo , Proteínas Quinasas JNK Activadas por Mitógenos/metabolismo , Macrófagos/metabolismo , Ratones , Proteínas Quinasas Activadas por Mitógenos/genética , Proteínas Quinasas Activadas por Mitógenos/metabolismo , FN-kappa B/genética , Óxido Nítrico/metabolismo , Óxido Nítrico Sintasa de Tipo II/genética , Óxido Nítrico Sintasa de Tipo II/metabolismo , Fosforilación , Tallos de la Planta/química , Factor de Necrosis Tumoral alfa/genética , Factor de Necrosis Tumoral alfa/metabolismo , Proteínas Quinasas p38 Activadas por Mitógenos/genética , Proteínas Quinasas p38 Activadas por Mitógenos/metabolismoRESUMEN
AIMS: Phragmites rhizoma was reported to have anti-oxidative and free radical scavenging activity. It also has been traditionally used to suppress inflammation. In the present study, we aimed to evaluate the topical effects of the polysaccharide-rich extract of P. rhizoma (PEP) on atopic dermatitis. MAIN METHODS: We induced AD-like skin lesions by an extract of the house-dust mite Dermatophagoides farinae (Dfb) in NC/Nga mice, and then performed macroscopic analysis, immunohistochemical staining and measurement of total serum IgE and cytokine production by ELISA. KEY FINDINGS: Topically applied PEP suppressed dermatitis with a decrease in dermatitis score and scratch number. The histological manifestations of atopic skin lesions including thickened epidermis and increased numbers of mast cells, polymorphonuclear leukocytes and nerve fibers were significantly attenuated. The activation of IgE and the levels of cytokines such as IFN-γ IL-4 and IL-10 were also decreased. SIGNIFICANCE: Our results indicated that PEP might have an inhibitory effect on atopic dermatitis-like lesion and be a promising natural resource in the treatment of atopic dermatitis.
Asunto(s)
Dermatitis Atópica/tratamiento farmacológico , Inmunoglobulina E/sangre , Extractos Vegetales/farmacología , Poaceae/química , Polisacáridos/farmacología , Animales , Citocinas/metabolismo , Dermatitis Atópica/inmunología , Dermatitis Atópica/patología , Dermatophagoides farinae/inmunología , Modelos Animales de Enfermedad , Ensayo de Inmunoadsorción Enzimática , Femenino , Mastocitos/metabolismo , Ratones , Fibras Nerviosas/metabolismo , Neutrófilos/metabolismo , Polisacáridos/aislamiento & purificaciónRESUMEN
Neuroinflammation is chronic inflammation within the brain that is attributed to prolonged activation of microglial cells and results in neurodegenerative events, such as neuronal dysfunction and neuronal loss. Therefore, suppression of neuroinflammation would theoretically slow progression of neurodegenerative disease. In this study, we investigated the anti-inflammatory effects of 4'-O-methylalpinumisoflavone (methylalpinumisoflavone), isolated from Cudrania tricuspidata, against LPS-induced microglial activation in BV2 cells. Exposure of BV2 cells to LPS (0.5 µg/mL) significantly increased production of pro-inflammatory mediators, including NO, PGE(2), and pro-inflammatory cytokines. Conversely, pre-treatment with methylalpinumisoflavone (10 and 20 µg/mL) prior to treatment with LPS resulted in a significant decrease of LPS-induced production of pro-inflammatory mediators in a dose-dependent manner. In addition, reduction of pro-inflammatory mediators by treatment with methylalpinumisoflavone prior to treatment with LPS was accompanied by a decrease in translocation of NF-κB p50 and p65 from the cytoplasm to the nucleus and by a decrease in activation of mitogen-activated protein kinases (MAPKs), such as ERK1/2 and JNK. Taken together, these results suggest that methylalpinumisoflavone suppressed LPS-induced microglial activation and production of pro-inflammatory mediators by decreasing NF-κB signaling and by phosphorylation of MAPKs. These results suggest the potential of methylalpinumisoflavone as an anti-inflammatory drug candidate.
Asunto(s)
Antiinflamatorios/farmacología , Inflamación/metabolismo , Isoflavonas/farmacología , Sistema de Señalización de MAP Quinasas/efectos de los fármacos , Microglía/efectos de los fármacos , Animales , Línea Celular , Ciclooxigenasa 2/metabolismo , Citocinas/metabolismo , Dinoprostona/metabolismo , Lipopolisacáridos/farmacología , Ratones , Microglía/metabolismo , Proteínas Quinasas Activadas por Mitógenos/metabolismo , FN-kappa B/metabolismo , Óxido Nítrico/metabolismo , Óxido Nítrico Sintasa de Tipo II/metabolismoRESUMEN
OBJECTIVES: In the present study, we aimed to examine the anti-atopic properties of bile from the cat fish, Silurus asotus, to determine its possible use as a pharmaceutical product. METHODS: The anti-atopic activities of cat fish bile were examined in a non-cell antioxidant, in-vitro assay (splenocytes and mast cells) and a 2,4-dinitrochlorobenzene (DNCB)-induced atopic dermatitis-like mouse model. RESULTS: The results of these experiments revealed that Silurus asotus bile (SAB) scavenges radicals and protects proteins from superoxide attacks, suggesting that SAB suppresses the T helper (Th) type 2-skewed immune response. Th1/Th2 mRNA cytokines (interleukin (IL)-2, interferon (IFN)-γ and IL-4) from mouse splenocytes were effectively inhibited, and the release of ß-hexosaminidase in RBL-2H3 mast cells was significantly suppressed by SAB. These results were supported by screening the Th1/Th2 cytokine mRNAs (IL-2, IFN-γ and IL-4) from lymph nodes in DNCB-treated mice. More dramatic results were observed in the histological changes at higher SAB concentrations (5%) compared to the therapeutic control, visualized using hematoxylin-eosin (H&E) staining. CONCLUSIONS: The results presented in this study suggest that SAB may provide functional advantages with regard to treating atopic dermatitis because of its antioxidant and immune-suppressive effects.
Asunto(s)
Antioxidantes/uso terapéutico , Bilis , Productos Biológicos/uso terapéutico , Bagres , Dermatitis Atópica/terapia , Piel/efectos de los fármacos , Linfocitos T/metabolismo , Animales , Antioxidantes/farmacología , Productos Biológicos/farmacología , Terapias Complementarias , Citocinas/antagonistas & inhibidores , Citocinas/genética , Dermatitis Atópica/inmunología , Dermatitis Atópica/metabolismo , Dinitroclorobenceno , Ganglios Linfáticos/efectos de los fármacos , Ganglios Linfáticos/metabolismo , Mastocitos/efectos de los fármacos , Mastocitos/metabolismo , Ratones , Ratones Endogámicos BALB C , Carbonilación Proteica/efectos de los fármacos , ARN Mensajero/metabolismo , Piel/patología , Bazo/citología , Bazo/efectos de los fármacos , Bazo/metabolismo , Superóxidos/metabolismo , Células TH1/efectos de los fármacos , Células TH1/metabolismo , Células Th2/efectos de los fármacos , Células Th2/metabolismo , beta-N-Acetilhexosaminidasas/antagonistas & inhibidoresRESUMEN
Myeloid-derived suppressor cells (MDSCs) actively suppress immune cells and have been considered as an impediment to successful cancer immunotherapy. Many approaches have been made to overcome such immunosuppressive factors and to exert effective anti-tumor effects, but the possibility of using medicinal plants for this purpose has been overlooked. Korean red ginseng (KRG) is widely known to possess a variety of pharmacological properties, including immunoboosting and anti-tumor activities. However, little has been done to assess the anti-tumor activity of KRG on MDSCs. Therefore, we examined the effects of KRG on MDSCs in tumor-bearing mice and evaluated immunostimulatory and anti-tumor activities of KRG through MDSC modulation. The data show that intraperitoneal administration of KRG compromises MDSC function and induces T cell proliferation and the secretion of IL-2 and IFN-γ, while it does not exhibit direct cytotoxicity on tumor cells and reduced MDSC accumulation. MDSCs isolated from KRG-treated mice also express significantly lower levels of inducible nitric oxide synthase and IL-10 accompanied by a decrease in nitric oxide production compared with control. Taken together, the present study demonstrates that KRG enhances T cell function by inhibiting the immunosuppressive activity of MDSCs and suggests that although KRG alone does not exhibit direct anti-tumor effects, the use of KRG together with conventional chemo- or immunotherapy may provide better outcomes to cancer patients through MDSC modulation.
RESUMEN
In pancreatic islets, free radical formation produced upon exposure to proinflammatory cytokines mediates ß cell destruction, which ultimately leads to type 1 diabetes (T1D). In this study, we examined whether laccase, a family of the blue copper protein, can be successfully used to prevent ß cells from cytokine-mediated apoptosis. Non-obese diabetic (NOD) mice were used for these experiments. In parallel, the RINm5f ß cell line was employed as a model system for in vitro experiments. The results demonstrated that laccase effectively scavenged peroxinitrite, which can be formed by nitric oxide, and upregulated the expression of antioxidant enzymes, such as manganese superoxide dismutase (MnSOD) and catalase. Interestingly, laccase balanced pro- (Bax) and anti-apoptotic (Bcl-2) proteins in terms of both the mRNA and protein levels with a downregulation of cytochrome c protein in RINm5f cells. In addition, laccase maintained blood glucose concentrations at a normal level with a simultaneous increase in plasma insulin levels during the spontaneous induction of diabetes in NOD mice. In conclusion, the antioxidant potentials of laccase in scavenging free radicals and upregulation of antioxidant enzymes may exert its pro-survival effect by counteracting the increased intracellular oxidative stress, and, consequently, by inhibiting apoptosis induced by cytokine-mediated activation during the course of T1D.
Asunto(s)
Antioxidantes/farmacología , Apoptosis/efectos de los fármacos , Diabetes Mellitus Tipo 1/tratamiento farmacológico , Células Secretoras de Insulina/efectos de los fármacos , Lacasa/farmacología , Estrés Oxidativo/efectos de los fármacos , Polyporales/química , Animales , Antioxidantes/metabolismo , Antioxidantes/uso terapéutico , Glucemia/metabolismo , Citocromos c/metabolismo , Citocinas/metabolismo , Diabetes Mellitus Tipo 1/metabolismo , Femenino , Insulina/sangre , Células Secretoras de Insulina/fisiología , Lacasa/uso terapéutico , Ratones , Ratones Endogámicos NOD , Ácido Peroxinitroso/metabolismo , Fitoterapia , Ratas , Regulación hacia Arriba , Proteína X Asociada a bcl-2/genética , Proteína X Asociada a bcl-2/metabolismoRESUMEN
The use of herbal medicines in the therapeutic treatment of atopic dermatitis (AD) has been suggested recently. The present study examined whether selected herbal extracts fermented in Lactobacillus plantarum (FHE) possessed anti-AD properties. In addition, the study assessed the increased bioavailability of these herbal extracts both in vitro and in vivo. The data from these experiments revealed that FHE inhibited the proliferation of splenic T and B cells in a dose-dependent manner, when activated with their mitogens. Moreover, the expression of Th1/Th2 mRNA cytokines (IL-2, IL-4, IL-5, IL-13) from mouse splenocytes was inhibited severely as was cyclosporine A. Furthermore, the release of beta-hexosaminidase in RBL-2H3 mast cells was suppressed significantly. FHE also reduced the plasma level of IgE in dust mite extract-induced AD-like NC/Nga mice. More dramatic results were found in the histological changes, which were observed by hematoxylin-eosin and toluidine blue staining, as well as in the macroscopic features on dorsal lesions of AD-like NC/Nga mice. In conclusion, the results presented in this study suggest that FHE may have therapeutic advantages for the treatment of AD due to its increased immune-suppressive and increased absorptive effects, which were fortified by L. plantarum fermentation.
Asunto(s)
Dermatitis Atópica/tratamiento farmacológico , Inmunosupresores/farmacología , Lactobacillus plantarum/metabolismo , Extractos Vegetales/farmacología , Administración Tópica , Animales , Línea Celular , Proliferación Celular/efectos de los fármacos , Cromatografía Líquida de Alta Presión , Citocinas/metabolismo , Modelos Animales de Enfermedad , Fermentación , Medicina de Hierbas , Inmunoglobulina E/sangre , Masculino , Ratones , Plantas Medicinales , Piel/patología , Bazo/citología , Bazo/metabolismo , Células TH1/efectos de los fármacos , Células TH1/metabolismoRESUMEN
Considering the importance of inflammation and apoptosis in neurodegenerative conditions, the potential suppressive effects of the Rg3, a by-product obtained during the steaming of red ginseng, may indicate that Rg3 could provide a beneficial therapeutic approach to treating or preventing neurodegenerative disease. We investigated the effect of Rg3 on Abeta42-mediated microglial activation and inflammation-mediated neurotoxicity in murine BV-2 microglial and Neuro-2a neuroblastoma cells, respectively. Rg3 effectively reduced inflammatory cytokine expression in Abeta42-treated BV-2, and inhibited the binding of NF-kappaB p65 to its DNA consensus sequences, and significantly reduced the expression of TNF-alpha in activated microglia. Pretreatment with Rg3 increased the survival rate of Neuro-2a exposed to TNF-alpha. These observations suggest that Rg3 reduced neurotoxicity by inhibiting chronic inflammation through the suppression of activated microglia. In addition, the expression of pro-inflammatory cytokines in BV-2 stimulated by Abeta42 was decreased but not eliminated by Rg3 when binding to the macrophage scavenger receptor type A (MSRA) was blocked with fucoidan. This implies that the inflammatory response may not be exclusively triggered via MSRA. More interestingly, iNOS was almost completely inhibited in the presence of Rg3 when MSRA binding was blocked with fucoidan. Moreover, Rg3 increased the expression of MSRA in BV-2 transfected with siRNA targeting MSRA mRNA, and this increased MSRA expression may play a role in the phagocytosis of Abeta42 peptides. Our results indicate that inhibition of the inflammatory repertoire of microglia, neuroprotection, and increased MSRA expression induced by Rg3 may at least partly explain its therapeutic effects in chronic neurodegenerative diseases.
Asunto(s)
Ginsenósidos/farmacología , Inflamación/patología , Inflamación/prevención & control , Microglía/patología , Síndromes de Neurotoxicidad/patología , Síndromes de Neurotoxicidad/prevención & control , Animales , Western Blotting , Línea Celular , Citocinas/antagonistas & inhibidores , Citocinas/biosíntesis , Citocinas/toxicidad , Ensayo de Inmunoadsorción Enzimática , Activación de Macrófagos/efectos de los fármacos , Ratones , Microglía/efectos de los fármacos , Neuronas/patología , Panax/química , Polisacáridos/farmacología , ARN Interferente Pequeño/farmacología , Reacción en Cadena de la Polimerasa de Transcriptasa InversaRESUMEN
Acne is a typical condition of adolescence and is caused by multi-factorial events including hormonal, microbiological and immunological mechanisms. Although there has been much debate about the direct involvement of bacteria, Propionibacterium acnes is now believed to contribute to the inflammatory stages of the condition, and thus initiate the inflamed lesion. The present study examined the anti-acne properties of the Selaginella involvens extract (SIE) in cell models. Primarily, SIE was not found to be cytotoxic under 50 microg/mL, and revealed the inhibitory effect on both nitric oxide (NO) production and iNOS/IL-1beta expression as well as the NO scavenging effect. The IL-1alpha and IL-8 cytokines, triggering the inflammatory acne response, were also inhibited in keratinocytes when stimulated with viable P. acnes. Furthermore, SIE was found to have an antioxidant effect in a dose-dependent manner in the hydroxyl radical-mediated oxidation test. Finally, it was found that SIE has non-antibiotic antimicrobial activity at a dose greater than 100 microg/mL on P. acnes. In conclusion, SIE may be a safe non-antibiotic anti-acne source in the therapeutic application of the treatment of acne development by reducing the chance of non-specific initiation and augmentation phase of the inflammatory response.
Asunto(s)
Acné Vulgar/tratamiento farmacológico , Antioxidantes/farmacología , Fitoterapia , Extractos Vegetales/farmacología , Selaginellaceae/química , Animales , Línea Celular , Relación Dosis-Respuesta a Droga , Expresión Génica/efectos de los fármacos , Humanos , Interleucinas/análisis , Interleucinas/biosíntesis , Queratinocitos/efectos de los fármacos , Lipopolisacáridos/farmacología , Macrófagos/efectos de los fármacos , Ratones , Óxido Nítrico/metabolismo , Óxido Nítrico Sintasa de Tipo II/análisis , Óxido Nítrico Sintasa de Tipo II/biosíntesis , Propionibacterium acnes/efectos de los fármacos , Propionibacterium acnes/crecimiento & desarrolloRESUMEN
The effects of Panax ginseng extracts on DNA damage, expression of cytochrome P450 (CYP) 1A1 and reproductive toxicity were evaluated in the testis of rats exposed to 2,3,7,8-tetrachlorodibenzo-p-dioxinthe (TCDD). Fifty rats were divided into five groups according to treatment with 2,3,7,8-TCDD and P. ginseng extracts. Single cell gel electrophoresis assays were performed to evaluate DNA damage that occurred in the lymphocytes of rats. Histological changes in the seminiferous tubules of the testis were determined using Johnsen's scoring system and Real Time-PCR was performed to evaluate the mRNA expression of CYP1A1. Significant pathological effects were observed in the 2,3,7,8-TCDD treated rats including a reduced seminiferous tubular diameter, an increased number of damaged tubules (maturation arrest, eosinophilic degeneration and spermatid giant cells) and increased Johnsen's score. DNA damage and the expression of CYP1A1 mRNA were significantly increased in rat testes. There were no significant differences between the control and animals treated with P. ginseng extracts. However, a significantly decreased level of DNA damage, decreased CYP1A1 expression and reduced pathological effects were observed in the 2,3,7,8-TCDD with P. ginseng extracts treated groups when compared with the TCDD treated group. In summary, our study demonstrates that 2,3,7,8-TCDD induces the pathological and genotoxical damage in rat testes, while P. ginseng extract treatment exhibits a therapeutic capacity to reduce these effects via reduction of CYP1A1 mRNA.