RESUMEN
BACKGROUND: Psychological stressors may cause affective disorders, such as depression and anxiety, by altering expressions of corticotropin releasing factor (CRF), serotonin (5-HT), and tyrosine hydroxylase (TH) in the brain. This study investigated the effects of essential oil from Asarum heterotropoides (EOAH) on depression-like behaviors and brain expressions of CRF, 5-HT, and TH in mice challenged with stress. METHODS: Male ICR mice received fragrance inhalation of EOAH (0.25, 0.5, 1.0, and 2.0 g) for 3 h in the special cage capped with a filter paper before start of the forced swimming test (FST) and tail suspension test (TST). The duration of immobility was measured for the determination of depression-like behavior in the FST and TST. The selective serotonin reuptake inhibitor fluoxetine as positive control was administered at a dose of 15 mg/kg (i.p.) 30 min before start of behavioral testing. Immunoreactivities of CRF, 5-HT, and TH in the brain were also measured using separate groups of mice subjected to the FST. RESULTS: EOAH at higher doses (1.0 and 2.0 g) reduced immobility time in the FST and TST. In addition, EOAH at a dose of 1.0 g significantly reduced the expected increases in the expression of CRF positive neurons in the paraventricular nucleus and the expression of TH positive neurons in the locus coeruleus, and the expected decreases of the 5-HT positive neurons in the dorsal raphe nucleus. CONCLUSION: These results provide strong evidence that EOAH effectively inhibits depression-like behavioral responses, brain CRF and TH expression increases, and brain 5-HT expression decreases in mice challenged with stress.
Asunto(s)
Antidepresivos/uso terapéutico , Aromaterapia , Asarum/química , Encéfalo/efectos de los fármacos , Depresión/tratamiento farmacológico , Aceites Volátiles/uso terapéutico , Estrés Psicológico/tratamiento farmacológico , Administración por Inhalación , Animales , Ansiolíticos/farmacología , Ansiolíticos/uso terapéutico , Antidepresivos/farmacología , Ansiedad/tratamiento farmacológico , Conducta Animal , Encéfalo/metabolismo , Hormona Liberadora de Corticotropina/metabolismo , Depresión/etiología , Trastorno Depresivo/tratamiento farmacológico , Trastorno Depresivo/etiología , Suspensión Trasera , Masculino , Ratones Endogámicos ICR , Aceites Volátiles/farmacología , Receptor de Serotonina 5-HT1A/metabolismo , Serotonina/metabolismo , Inhibidores Selectivos de la Recaptación de Serotonina/farmacología , Inhibidores Selectivos de la Recaptación de Serotonina/uso terapéutico , Estrés Psicológico/etiología , Natación , Tirosina 3-Monooxigenasa/metabolismoRESUMEN
Alzheimer's disease, a neurodegenerative disorder, is characterized by progressive cognitive impairment associated with the disruption of cholinergic neurotransmission. The aim of the present study was to evaluate the effect of α- or ß-amyrin, a type of pentacyclic triterpene, on the cognitive impairment induced by scopolamine, a muscarinic acetylcholine receptor antagonist. To measure the abilities of various types of learning and memory, we conducted step-through passive avoidance task. Scopolamine induced deficits in learning and memory processes in mice, which were antagonized by a single administration of α-amyrin (2 or 4 mg/kg) or ß-amyrin (4 mg/kg), respectively. Additionally, in vitro analysis revealed that acetylcholinesterase activity was inhibited by ß-amyrin, but not by α-amyrin. Furthermore, Western blot analysis revealed that the expression levels of phosphorylated extracellular signal-regulated kinase 1/2 (pERK) and phosphorylated glycogen synthase kinase-3ß (pGSK-3ß) were significantly enhanced by a single administration of α- and ß-amyrin in the hippocampus. Finally, the memory ameliorating effects of α- or ß-amyrin on the scopolamine-induced cognitive impairments were significantly blocked by ERK inhibitor U0126. The present study suggests that α- and ß-amyrin may ameliorate the cognitive impairment induced by hypocholinergic neurotransmission via the activation of ERK as well as GSK-3ß signaling.
Asunto(s)
Conducta Animal/efectos de los fármacos , Trastornos del Conocimiento/tratamiento farmacológico , Antagonistas Muscarínicos/farmacología , Ácido Oleanólico/análogos & derivados , Escopolamina/farmacología , Acetilcolinesterasa/química , Animales , Reacción de Prevención/efectos de los fármacos , Trastornos del Conocimiento/inducido químicamente , Trastornos del Conocimiento/enzimología , Trastornos del Conocimiento/psicología , Modelos Animales de Enfermedad , Relación Dosis-Respuesta a Droga , Glucógeno Sintasa Quinasa 3/metabolismo , Glucógeno Sintasa Quinasa 3 beta , Hipocampo/efectos de los fármacos , Hipocampo/enzimología , Hipocampo/metabolismo , Sistema de Señalización de MAP Quinasas/efectos de los fármacos , Masculino , Memoria/efectos de los fármacos , Ratones Endogámicos ICR , Ácido Oleanólico/administración & dosificación , Ácido Oleanólico/uso terapéuticoRESUMEN
Memory impairment is the most common symptom in patients with Alzheimer's disease (AD). Angelica keiskei (AK) has traditionally been used as a diuretic, laxative, analeptic and galactagogue. However, the anti-amnesic effects of AK and its molecular mechanisms have yet to be clearly elucidated. The aim of the present study is to evaluate the effects of AK on scopolamine-induced memory impairments in mice. The regulatory effect of AK on memory impairment was investigated using passive avoidance, Y-maze and the Morris water maze tasks. Acetylcholinesterase (AChE) activity assay was performed to investigate the cholinergic antagonistic effect of AK in the hippocampus. The effect of AK on phosphorylation of cAMP response element-binding protein (CREB) and expression of brain-derived neurotrophic factor (BDNF) were evaluated by Western blot assays and immunohistochemistry. The findings showed that AK significantly attenuated scopolamine-induced cognitive impairment in mice. Increase of AChE activity caused by scopolamine was significantly attenuated by AK. Additionally, AK significantly recovered the phosphorylation of CREB and expression of BDNF reduced by scopolamine in the hippocampus. Taken together, these results provide experimental evidence that AK might be a useful agent in preventing deficit of learning and memory caused by AD and aging.
Asunto(s)
Angelica , Trastornos de la Memoria/tratamiento farmacológico , Fitoterapia , Extractos Vegetales/uso terapéutico , Acetilcolinesterasa/metabolismo , Animales , Reacción de Prevención , Factor Neurotrófico Derivado del Encéfalo/metabolismo , Proteína de Unión a Elemento de Respuesta al AMP Cíclico/metabolismo , Masculino , Trastornos de la Memoria/inducido químicamente , Trastornos de la Memoria/metabolismo , Ratones , Ratones Endogámicos ICR , Extractos Vegetales/farmacología , Hojas de la Planta , EscopolaminaRESUMEN
Sophoricoside exhibits numerous pharmacological effects, including anti- inflammatory and anti-cancer actions, yet the exact mechanism that accounts for the anti-allergic effects of sophoricoside is not completely understood. The aim of the present study was to elucidate whether and how sophoricoside modulates the mast cell-mediated allergic inflammation in vitro and in vivo. We investigated the pharmacological effects of sophoricoside on both compound 48/80 or histamine-induced scratching behaviors and 2,4-dinitrochlorobenzene (DNCB)-induced atopic dermatitis in mice. Additionally, to find a possible explanation for the anti-inflammatory effects of sophoricoside, we evaluated the effects of sophoricoside on the production of histamine and inflammatory cytokines and activation of nuclear factor-κB (NF-κB) and caspase-1 in phorbol 12-myristate 13-acetate plus calcium ionophore A23187 (PMACI)-stimulated human mast cells (HMC-1). The finding of this study demonstrated that sophoricoside reduced compound 48/80 or histamine-induced scratching behaviors and DNCB-induced atopic dermatitis in mice. Additionally, sophoricoside inhibited the production of inflammatory cytokines as well as the activation of NF-κB and caspase-1 in stimulated HMC-1. Collectively, the findings of this study provide us with novel insights into the pharmacological actions of sophoricoside as a potential molecule for use in the treatment of allergic inflammation diseases.
Asunto(s)
Antiinflamatorios/farmacología , Benzopiranos/farmacología , Dermatitis Atópica/tratamiento farmacológico , Mastocitos/metabolismo , Animales , Calcimicina/farmacología , Ionóforos de Calcio/farmacología , Carcinógenos/farmacología , Caspasa 1/metabolismo , Línea Celular , Citocinas/metabolismo , Dermatitis Atópica/inducido químicamente , Dermatitis Atópica/metabolismo , Dermatitis Atópica/patología , Dinitroclorobenceno/efectos adversos , Dinitroclorobenceno/farmacología , Histamina/metabolismo , Humanos , Irritantes/efectos adversos , Irritantes/farmacología , Masculino , Mastocitos/patología , Ratones , Ratones Endogámicos BALB C , Ratones Endogámicos ICR , FN-kappa B/metabolismo , Acetato de Tetradecanoilforbol/farmacologíaRESUMEN
We investigated the cellular and molecular mechanisms mediating the effects of Angelica gigas Nakai extract (AGNE) through the mitogen-activated protein kinases (MAPKs)/NF-κB pathway using in vitro and in vivo atopic dermatitis (AD) models. We examined the effects of AGNE on the expression of proinflammatory cytokines and chemokines in human mast cell line-1 (HMC-1) cells. Compound 48/80-induced pruritus and 2,4-dinitrochlorobenzene- (DNCB-) induced AD-like skin lesion mouse models were also used to investigate the antiallergic effects of AGNE. AGNE reduced histamine secretion, production of proinflammatory cytokines including interleukin- (IL-) 1ß, IL-4, IL-6, IL-8, and IL-10, and expression of cyclooxygenase- (COX-) 2 in HMC-1 cells. Scratching behavior and DNCB-induced AD-like skin lesions were also attenuated by AGNE administration through the reduction of serum IgE, histamine, tumor necrosis factor-α (TNF-α), IL-6 levels, and COX-2 expression in skin tissue from mouse models. Furthermore, these inhibitory effects were mediated by the blockade of the MAPKs and NF-κB pathway. The findings of this study proved that AGNE improves the scratching behavior and atopy symptoms and reduces the activity of various atopy-related mediators in HMC-1 cells and mice model. These results suggest the AGNE has a therapeutic potential in anti-AD.
RESUMEN
OBJECTIVE: To investigate the anti-inflammatory effects of decursin and decursinol angelate-rich Angelica gigas Nakai (AGNE) on dextran sulfate sodium (DSS)-induced murine ulcerative colitis (UC). METHODS: The therapeutic effect of an AGNE was analyzed in a mouse model of UC induced by DSS. Disease activity index values were measured by clinical signs such as a weight loss, stool consistency, rectal bleeding and colon length. A histological analysis was performed using hematoxylin and eosin staining. Key inflammatory cytokines and mediators including IL-6, TNF-α, PGE2, COX-2 and HIF-1α were assayed by enzyme-linked immunosorbent assay or western blotting. RESULTS: Treatment with the AGNE at 10, 20, and 40 mg/kg alleviated weight loss, decreased disease activity index scores, and reduced colon shortening in mice with DSS-induced UC. AGNE inhibited the production of IL-6 and TNF-α in serum and colon tissue. Moreover, AGNE suppressed the increased expression of COX-2 and HIF-1α and the increased production of PGE2 in colon tissue were observed in mice with DSS-induced UC. Additionally, histological damage was also alleviated by AGNE treatment. CONCLUSIONS: The findings of this study verified that AGNE significantly improves clinical symptoms and reduces the activity of various inflammatory mediators. These results indicate the AGNE has the therapeutic potential in mice with DSS-induced UC.
RESUMEN
Ribes fasciculatum var. chinense MAX. (R. fasciculatum) has traditionally been used in Korea to treat inflammatory diseases. However, the exact mechanism that accounts for the anti-inflammatory effect of R. fasciculatum is not completely understood. We aimed to ascertain the pharmacological effects of R. fasciculatum on both compound 48/80- or histamine-induced scratching behaviors and 2, 4-dinitrochlorobenzene (DNCB)-induced atopic dermatitis (AD) in mice. Additionally, to find a possible explanation for the anti-inflammatory effects of R. fasciculatum, we evaluated the effects of R. fasciculatum on the production of inflammatory mediators in LPS-stimulated macrophage cells. Treatment of R. fasciculatum significantly reduced compound 48/80- or histamine-induced the pruritus in mice. R. fasciculatum attenuated the AD symptoms such as eczematous, erythema and dryness and serum IgE levels in AD model. Additionally, R. fasciculatum inhibited the production of tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6). The maximal rates of TNF-α and IL-6 inhibition by R. fasciculatum (1 mg/ml) were approximately 32.12% and 46.24%, respectively. We also showed that R. fasciculatum inhibited the activation of nuclear factor-kappa B in LPS-stimulated macrophages. Collectively, the findings of this study provide us with novel insights into the pharmacological actions of R. fasciculatum as a potential molecule for use in the treatment of allergic inflammatory diseases.
RESUMEN
AIMS: Betula platyphylla (B. platyphylla) has traditionally been used in Korea to treat inflammatory diseases. However, the exact mechanism that accounts for the anti-inflammatory effect of B. platyphylla is not completely understood. The aim of the present study is to elucidate whether and how B. platyphylla modulates the mast cell-mediated allergy inflammation in vitro and in vivo. MAIN METHODS: We investigated to ascertain the pharmacological effects of B. platyphylla on both compound 48/80 or histamine-induced scratching behaviors and 2, 4-dinitrochlrobenzene (DNCB)-induced atopic dermatitis in mice. Additionally, to find a possible explanation for the anti-inflammatory effects of B. platyphylla, we evaluated the effects of B. platyphylla on the release of histamine in compound 48/80-induced rat peritoneal mast cells (RPMCs), production of inflammatory mediators and activation of nuclear factor-κB (NF-κB) and caspase-1 in phorbol 12-myristate 13-acetate plus calcium ionophore A23187 (PMACI)-stimulated human mast cells (HMC-1). KEY FINDINGS: The finding of this study demonstrated that B. platyphylla reduced compound 48/80 or histamine-induced scratching behaviors and DNFB-induced atopic dermatitis in mice. Additionally, B. platyphylla inhibited the release of histamine in RPMC and production of inflammatory cytokines as well as the activation of NF-κB and caspase-1 in stimulated HMC-1. SIGNIFICANCE: Collectively, the findings of this study provide us with novel insights into the pharmacological actions of B. platyphylla as a potential molecule for use in the treatment of allergic inflammatory diseases.