Background: Increases in the average global temperature cause heat stress-induced disorders by disrupting homeostasis. Excessive heat stress triggers an imbalance in the immune system; thus protection against heat stress is important to maintain immune homeostasis. Korean ginseng (Panax ginseng Meyer) has been used as a herbal medicine and displays beneficial biological properties. Methods: We investigated the protective effects of Korean ginseng extracts (KGEs) against heat stress in a rat model. Following acclimatization for 1 week, rats were housed at room temperature for 2 weeks and then exposed to heat stress ($40^{\circ}C$/2 h/day) for 4 weeks. Rats were treated with three KGEs from the beginning of the second week to the end of the experiment. Results: Heat stress dramatically increased secretion of inflammatory factors, and this was significantly reduced in the KGE-treated groups. Levels of inflammatory factors such as heat shock protein 70, interleukin 6, inducible nitric oxide synthase, and tumor necrosis factor-alpha were increased in the spleen and muscle upon heat stress. KGEs inhibited these increases by down-regulating heat shock protein 70 and the associated nuclear $factor-{\kappa}B$ and mitogen-activated protein kinase signaling pathways. Consequently, KGEs suppressed activation of T-cells and B-cells. Conclusion: KGEs suppress the immune response upon heat stress and decrease the production of inflammatory cytokines in muscle and spleen. We suggest that KGEs protect against heat stress by inhibiting inflammation and maintaining immune homeostasis.
Caffeic acid phenethyl ester (CAPE) is an active component of propolis obtained from honeybee hives. CAPE possesses anti-mitogenic, anti-carcinogenic, anti-inflammatory, and immunomodulatory activities in diverse systems, which know as displays antioxidant activity and inhibits lipoxygenase activities, protein tyrosine kinase, and nuclear factor kappa B (NF-κB) activation. This study aimed to investigate the effect of CAPE on lipopolysaccharide (LPS)-induced human neutrophil phagocytosis. Human neutrophils were cultured with various concentrations of CAPE (1, 10, and 100 µM) with or without LPS. The pro-inflammatory proteins (tumor necrosis factor-alpha [TNF-α], interleukin [IL]-6 and IL-8) levels were measured after 4 h incubation. To investigate the intracellular signaling pathway, we measured the levels of mitogen-activated protein kinases (MAPK), including phosphorylation of p38, extracellular signal-regulated protein kinases 1 and 2 (ERK1/2) and c-Jun N-terminal kinase (JNK). Next, to evaluate the potential phagocytosis, neutrophils were labeled with iron particles of superparamagnetic iron oxide nanoparticles (SPIONs, 40 nm) for 1 h in culture medium containing 5 mg/mL of iron. The labeling efficiency was determined by Prussian blue staining for intracellular iron and 3T-wighted magnetic resonance imaging. CAPE decreased the activation of intracellular signaling pathways, including ERK1/2 and c-Jun, and expression of pro-inflammatory cytokines, including TNF-α and IL-6, but had no effect on the signaling pathways of p38 and cytokine IL-8. Furthermore, images obtained after mannan-coated SPION treatment suggested that CAPE induced significantly higher signal intensities than the control or LPS group. Together, these results suggest that CAPE regulates LPS-mediated activation of human neutrophils to reduce phagocytosis.
Objectives : Osteoporosis is the most common bone disease and osteoporosis fracture is the leading cause of decreased life. Bisphosphonate and selective estrogen receptor modulators are the best choice of treatment for osteoporosis. However, when used for a long time, they increase the probability of side effect such as osteonecrosis of the jaw. Thus, it is crucial to develop alternative medicine to treat osteoporosis. Gentianae Macrophyllae Radix, a herbal medicine, is mainly to treat rheumatoid arthritis. However, the effect of the water extract of Gentianae Macrophyllae Radix (w-GM) on osteoporosis has not been investigated. Thus, we examine whether w-GM can inhibit osteoclast differentiation and bone resorption on receptor activator of nuclear factor kappa-B (NF-κB) ligand (RANKL)-treated RAW 264.7 cells. In this study, RAW 264.7 cells were used as an osteoclast differentiation model by treating them with RANKL. Methods : RAW 264.7 cells were used to determine the effect of w-GM on osteoclast differentiation and bone resorption. The number of tartrate-resistant acid phosphatase (TRAP)-positive cells, TRAP activity and pit formation assay were examined. In addition, protein expressions were measured by western blot and mRNA expressions were analyzed by reverse transcription polymerase chain reaction. Results : Treatment with w-GM inhibited the number of TRAP-positive cells, TRAP activity and pit area. In addition, w-GM decreased protein expression such as mitogen-activated protein kinase, NF-κB, c-Fos and nuclear factor of activated T-cells cytoplasmic 1 (NFATc1). It also inhibited the mRNA levels such as c-Fos, NFATc1, TRAP, NF-κB, calcitonin receptor and cathepsin K in RANKL-treated RAW 264.7 cells. Conclusions : These results suggest that w-GM has inhibitory effects via osteoclast differentiation, thus it could be a new medication for osteoporosis.
Background: Panax ginseng Meyer (P. ginseng), a herb distributed in Korea, China and Japan, exerts benefits on diverse inflammatory conditions. However, the underlying mechanism and active ingredients remains largely unclear. Herein, we aimed to explore the active ingredients of P. ginseng against inflammation and elucidate underlying mechanisms. Methods: Inflammation model was constructed by lipopolysaccharide (LPS) in C57BL/6 mice and RAW264.7 macrophages. Molecular docking, molecular dynamics, surface plasmon resonance imaging (SPRi) and immunofluorescence were utilized to predict active component. Results: P. ginseng significantly inhibited LPS-induced lung injury and the expression of proinflammatory factors, including TNF-α, IL-6 and IL-1β. Additionally, P. ginseng blocked fluorescencelabeled LPS (LPS488) binding to the membranes of RAW264.7 macrophages, the phosphorylation of nuclear factor-κB (NF-κB) and mitogen-activated protein kinases (MAPKs). Furthermore, molecular docking demonstrated that ginsenoside Ro (GRo) docked into the LPS binding site of toll like receptor 4 (TLR4)/myeloid differentiation factor 2 (MD2) complex. Molecular dynamic simulations showed that the MD2-GRo binding conformation was stable. SPRi demonstrated an excellent interaction between TLR4/ MD2 complex and GRo (KD value of 1.16 × 10-9 M). GRo significantly inhibited LPS488 binding to cell membranes. Further studies showed that GRo markedly suppressed LPS-triggered lung injury, the transcription and secretion levels of TNF-α, IL-6 and IL-1β. Moreover, the phosphorylation of NF-κB and MAPKs as well as the p65 subunit nuclear translocation were inhibited by GRo dose-dependently. Conclusion: Our results suggest that GRo exerts anti-inflammation actions by direct inhibition of TLR4 signaling pathway.
The stems of Dendrobium moniliforme are used in traditional Oriental medicine as a Yin tonic to nourish the stomach, promote the production of body fluid, and reduce fever. This study investigated the effects of the aqueous extract of D. moniliforme stems (DME) on mast cell degranulation and the expression of tumor necrosis factor-α (TNF-α), interleukin-4 (IL-4), and histamine-synthesizing enzyme histidine decarboxylase (HDC). We used rat mast cell line RBL-2H3 cells and stimulated them with PMA plus calcium ionophore (PMACI). Pretreatment with DME significantly inhibited PMACI-induced β-hexosaminidase release and the expression of TNF-α, IL-4, and HDC. Furthermore, DME suppressed PMACI-induced nuclear translocation of the nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) and activator protein 1 (AP-1). In addition, HDC expression was inhibited by SP600125 (JNK inhibitor), PD98059 (ERK inhibitor), and SB203580 (p38 kinase inhibitor). Finally, the phosphorylation of p38 kinase, extracellular signal-regulated kinase 1/2 (ERK1/2), and c-Jun N-terminal kinase (JNK) was inhibited by pretreatment with DME. These results suggest that DME has inhibitory effects against degranulation, cytokine (TNF-α and IL-4) and HDC expression, and that HDC expression is mediated by MAPK signaling. These findings suggest that DME may have therapeutic potential in the treatment of hypersensitive and inflammatory diseases.
Ji, Choi;Hae-Jin, Park;Il-ha, Jeong;Min Ju, Kim;Mi-Rae, Shin;Seong-Soo, Roh;Soon-Ae, Park;Mi-Lim, Kim
The Korea Journal of Herbology
/
v.38
no.2
/
pp.17-26
/
2023
Objectives : A persistent inflammatory response can cause diseases such as fibrosis, cancer, and allergies. This study aimed to investigate the anti-inflammatory activity of Curcumae longae Rhizoma and Cinnamomi Ramulus Mixture (CCM) in lipopolysaccharide (LPS)-stimulated RAW264.7 cells. Methods : The total polyphenol and flavonoid contents of CCM were confirmed through an in vitro experiment. Also, radical scavenging activities of 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), and Hydroxyl were confirmed. Moreover, ferric reducing antioxidant power (FRAP) activity were confirmed. After, CCM (50, 100, and 200 ㎍/mL) were applied to 0.1 ㎍/mL LPS-stimulated RAW264.7 cells. The levels of nitric oxide (NO) and pro-inflammatory cytokines in the supernatant fraction were determined. Also, the expressions of mitogen-activated protein kinase (MAPK) and nuclear factor-κB (NF-κB) pathways were detected using Western blot. Results : As a result of in vitro experiments, there was an excellent antioxidant activity in CCM-treated cells. In addition, in RAW264.7 cells stimulated with LPS, the increased NO level was inhibited in a concentration-dependent manner by the treatment of CCM. In addition, inflammatory cytokines production were significantly inhibited in a concentration-dependent manner in CCM-treated group. CCM treatment significantly decreased the protein expressions of MAPKs. Moreover, the expressions of NF-κBp65 and cyclooxygenase-2 (COX-2) were significantly decreased when 200 mg/kg of CCM was applied, and phospho-inhibitor of nuclear factor kappa B-α (p-IκBα) and inducible nitric oxide synthase (iNOS) were significantly decreased at all concentrations treated with CCM. Conclusion : Our findings show that CCM exhibited excellent antioxidant activity and exhibited superior anti-inflammatory effect through the MAPKs and NF-κB pathways in LPS-stimulated RAW 264.7 macrophages.
This study was conducted to select some useful plants as functional material candidates. A total of 38 plants were preliminarily screened for the anti-inflammatory and antioxidant activities. The preliminarily selected 8 plants were further investigated to verify the in vitro inhibitory effect on inflammation and oxidative stress. Boehmeria platanifolia (root), Carpinus coreana (branch), and Eupatorium japonicum (leaf) inhibited the expression of inducible nitric oxide synthase (iNOS) in lipopolysaccharide (LPS)-treated RAW 264.7 cells. Eupatorium japonicum (leaf) suppressed the expression of cyclooxygenase-2 (COX-2), whereas Boehmeria platanifolia (root) and Prunus yedoensis (branch) inhibited the transcription of nuclear factor-kappa B (NF-${\kappa}B$). Treatment with the extracts ($2.5{\sim}20{\mu}g/ml$) of Abutilon theophrasti (leaf, flower/seed) and Hemistepta lyrata (stem) did not show toxicity on RAW 264.7 cell proliferation, but treatment with $2.5{\mu}g/ml$ of Boehmeria platanifolia (root) exhibited cell toxicity. Carpinus coreana (branch) and Prunus yedoensis (branch) showed potent scavenging activities on peroxynitrite. Akebia quinata (flower), Carpinus coreana (branch), and Prunus yedoensis (branch) effectively inhibited reactive oxygen species (ROS). Abutilon theophrasti (leaf), Boehmeria platanifolia (root), Carpinus coreana (branch), and Eupatorium japonicum (leaf) exhibited strong inhibitory capacity with regard to nitric oxide (NO) production. The results suggested that Abutilon theophrasti (leaf) has in vitro anti-inflammatory and antioxidant activities, and that is a useful functional material candidate.
Objectives : This study aimed to find the curative effect of Gamitongkyutang distillate in mice with allergic rhinitis. Metbods : Forty mice were divided into four groups: the normal group, the control group (allergic rhinitis elicited group), the sample I group (Gamitongkyutang treated group after allergic rhinitis elicitation) and the sample II group (distillate of Gamitongkyutang treated group after allergic rhinitis elicitation). Indexes of AR were investigated such as the histological changes of the nasal mucosa, the changes of eosinophil count, the changes of interleukin-4(IL-4) secretion in the intranasal mucosa, the alteration of inducible nitric oxide synthase(iNOS) mRNA expression and the distribution of the nuclear factor kappa B (NF-kB). ANOVA test was used for statistical analysis (p<0.05). Results : Loss of the cilium and the mucous secretion in the sample I and II groups was rare when compared to the control group. The segment of eosinophil was significantly decreased in the sample I and II groups when compared to the control group (p<0.05). A significant decrease of IL-4 mRNA expression was observed in the sample I and II groups when compared with the control group (p<0.05). Inhibition of iNOS induced by NF-kB p50 in the sample I and II groups was significantly superior to that in the control group (p<0.05). DGT and GT didn't affect AST and ALT. Conclusions : GT was superior to DGT in the IL-4 secretion, eosinophil levels and iNOS production. However, considering the difficulty in taking herbal medicine, the DGT has a meaningful curative effect in mice with allergic rhinitis.
Journal of Physiology & Pathology in Korean Medicine
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v.19
no.5
/
pp.1399-1404
/
2005
In oriental medicine, Cheongpyehwadam-tang (CHT) has long been used for the cure of inflammatory diseases in the lung and bronchus such as bronchitis, bronchial asthma, pneumonia and tuberculosis. It's use is currently further extended for the treatment of allergic asthma. To investigate the anti-inflammatory effects of CHT, we investigated the effects of CHT on the lipopolysaccharide (LPS)-induced nitric oxide (NO) and pro-inflammatory cytokines ($TNF-{\alpha}$, IL-6, and $IL-1{\beta}$) production, and on the level of inducible nitric oxide synthase (iNOS) and proinflammatory cytokines expression in murine macrophage RAW 264.7 cells. CHT alone did not affect NO or pro-inflammatory cytokines production. In contrast, CHT inhibited LPS-induced NO and proinflammatory cytokines and the levels of LPS-induced iNOS and proinflarnmatory cytokine mRNA in a dose-dependent manner. CHT also inhibited the nuclear factor-kappa B (NF-kB) activation. Taken together, these results suggested that CHT inhibits the production of NO and pro-inflammatory cytokines in RAW 264.7 cells through blockade of NF-kB activation.
Objective: This study was performed to investigate the inhibitory effect of Cheongpochukeo-tang (CCT) on lipopolysaccharide (LPS)-induced inflammation model. Methods: RAW 264.7 cells were pre-treated with CCT and incubated with LPS (500 ng/ml) after 1 hour. Cell viability was measured by MTT assay to figure out cytotoxicity of CCT. The production of nitric oxide and mRNA expression of pro-inflammatory cytokine were measured. And the activation of mitogen-activated protein kinases (MAPKs) and nuclear factor kappa B (NF-κB) were examined to figure out molecular mechanisms of CCT's anti-inflammatory effects. In addition, mice survival rate and cytokine levels of serum were observed after treated with CCT. And mice liver tissues were observed and their cytokines levels in liver tissue were measured. Results: CCT did not have cytotoxic effect in RAW 264.7 cells. It inhibited LPS-induced nitric oxide (NO) production, but showed an increase in NO by itself at 2 mg/ml concentration. CCT inhibited mRNA expression of IL-1β, IL-6, TNF-α in a dose dependant and the activaton of MAPKs and NF-κB. In addition, CCT reduced mortality in the LPS-induced mouse model and inhibited production of cytokines in mouse serum and liver tissue. Conclusion: The results suggest that CCT could reduce LPS-induced inflammation by inhibiting MAPKs and NF-κB activaton, NO production, and pro-inflammatory cytokines secretion. Thereby, CCT could be effective medicine for the inflammatory disease.
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