Journal of Physiology & Pathology in Korean Medicine
/
v.21
no.4
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pp.907-915
/
2007
In this study the effect of water extract of Sophora tonkinensis Gapnep (RST) was investigated on the growth of human lung carcinoma A549 cells. Exposure of A549 cells to RST resulted in the growth inhibition in a dose-dependent manner as measured by MTT assay. The antiproliferative effect by RST treatment in A549 cells was associated with morphological changes such as membrane shrinking and cell rounding up. RST treatment did not induce the cell cycle arrest and the levels of tumor suppressor p53 as well as cyclin-dependent kinase inhibitor p21(WAF1/CIP1). It was found that RST treatment decreased the levels of cyclooxygenase (COX) -2 mRNA and protein expression without significant changes in the expression of COX-1 and inducible nitric oxide synthase (iNOS), which was correlated with a decrease in prostaglandin E2 (PGE2) synthesis. RST treatment also slightly inhibited the levels of human telomerase reverse transcriptase (hTERT) mRNA and protein expression, and the activity of telomerase. Taken together, these findings suggested that RST-induced inhibition of human lung carcinoma A549 cell growth was aoosciated with the inhibition of COX-2 expression and PGE2 production. These results provided important new insights into the possible molecular mechanisms of the anti-cancer activity of RST.
Park, Yang-Gu;Jung, Myung;Bok, Young-Ok;Lee, Jin-Ho;Kang, Suk-Hoon;Lim, Kyu-Sang;Yun, Young-Gab
The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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v.29
no.1
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pp.16-32
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2016
Objective : The water extract of Bojungikgi-tang (BTE) composed with Ginseng Radix, Astragali Radix, Angelicae gigantis Radix, Atractylodes Rhizoma alba, Aurantii nobilis Pericarpium, Glycyrrhizae Radix, Cimicifuga Rhizoma, and Bupleuri Radix and it has been traditionally used for chronic diseases or weakness after illness in oriental countries. However, little is known about the effects of aqueous extract of BTE on trimellitic anhydride (TMA)-induced contact hypersensitivity (CHS). Therefore, the aim of this study was to investigate the effects of BTE on TMA-induced CHS in BALB/c mice.Methods : In this study, the extract of BTE was prepared by extracting with distilled water at 100℃ for 2.5 h. The extract was freeze-dried following filtration through 0.45 μm filter. Mice were orally administrated with or without BTE extract of different doses (25-200 ㎎/㎏/day) for 28 days. During the challenge period, mice were externally applied with different doses of BTE extract one time per day 30 min before TMA treatment. I examined the effects of BTE on the serum levels of IgE, IgG1, IgG2a, and IgG2b, nitric oxide (NO) and prostaglandin E2 (PGE2) production in isolated peritoneal macrophages, Th2 cytokine production in isolated spleen cells, ear swelling responses, and the leukocyte infiltration induced by TMA.Results : The orally and externally administration of BTE dose-dependently reduced the serum levels of hapten-specific immunoglobulin E (IgE), IgG1 titer, and PGE2 production as well as ear swelling responses and leukocyte infiltration in TMA-induced BALB/c mice. The levels of NO and PGE2 production from peritoneal macrophages stimulated with TMA-BSA were markedly suppressed by pretreatment with BTE in a concentration dependent manner. Furthermore, the levels of Th2 cytokines (IL-4, IL-5, IL-13) production from spleen cells stimulated with ConA were markedly suppressed by BTE treatment in a concentration dependent manner.Conclusions : These results suggest that BTE treatment suppresses chronic contact hypersensitivity, and it can be assumed that the suppression of ear swelling, serum IgE, NO and PGE2 levels, leukocyte infiltration, and Th2 cytokines in an animal model. Therefore, these properties may contribute to the strong anti-CHS response effect of BTE.
To maintain its functional integrity, bone is continuously remodelled by a process involving resorption by osteoeclasts and formation by osteoblasts, In order to respond to changes in the physical environment or to trauma with the relevant action, this process is strictly regulated by locally synthesized or systemic fators, Prostaglandin $E_2(PGE_2$) is perhaps one of the best studied factors, having been known to affect bone cell function for several decades.$PGE_2$ has both anabolic and catabolic activities. Excess of $PGE_2$ has been implicated in a number of pathological states associated with bone loss in a number of chronic inflammatory conditions such as periodontal disease and rheumatoid arthritis. $PGE_2$ and other arachidonic acid metabolites have been shown to be potent stimulators of osteoclastic bone resorption in organ culture. The anabolic effects of $PGE_2$ were first noticed when an increase in periosteal woven bone formation was seen after the infusion of $PGE_2$ into infants in order to prevent closure of the ductus arteriosus. The cellular basis for the catabolic actions of $PGE_2$ has been well characterized. $PGE_2$increases osteoclast recruitment in bone marrow cell cultures. Also $PGE_2$ has a direct action on osteoclast serving to inhibit activity and can also indirectly activate osteoclast via other cells in the vicinity, presumably osteoblast. The cellular mechanisms for the anabolic actions of $PGE_2$ are not nearly so well understood. The purpose of this paper was to study the effects of $PGE_2$ and dibutyl(DB)cAMP on osteoblastic clone MC3T3El cells and on the generation of osteoclasts from their precursor cells. The effect of $PGE_2$ and DBcAMP on the induction of alkaline phoaphatase(AlP) was investigated in osteoblastic clone MC3T3El cells cultured in medium containing 0.4% fetal bovine serum. $PGE_2$ and DBcAMP stimulated ALP activity and MTT assay in the cells in a dose-dependent manner at concentrations of lO-SOOng/ml. Cycloheximide, protein synthesis inhibitor, inhibited the stimulative effect of $PGE_2$ and DBcAMP on ALP activity in the cells. $PGE_2$also increased the intracellular cAMP content in a dose-dependent fashion with a maximal effect at 500ng/ml. The effect of $PGE_2$ on the generation of osteoclasts was investigated in a coculture system of mouse bone marrow cells with primary osteoblastic cells cultured in media containing 10% fetal bovine serum.After cultures, staining for tartrate-resistant acid phosphatase(TRAP)-marker enzyme of osteoclast was performed. The TRAP(+) multinucleated cells(MNCs), which have 3 or more nuclei, were counted. More TRAP(+) MNCs were formed in coculture system than in control group. $PGE_2(10^{-5}10^{-6}M)$ stimulated the formation of osteoclast cells from mouse bone marrow cells in culture. $PGE_2(10^{-6}M)$ stimulated the formation of osteoclast cells from mouse bone marrow cells in coculture of osteoblastic clone MC3T3E1 cells This results suggest that $PGE_2$ stimulates the differentiation of osteoblasts and generation of osteoclast, and are involved in bone formation, as well as in bone resorption.
Apoptosis is a physiologic or programmed cell death process which is controlled by genes. It is essential for the function and the appropriate development of multicellular organism. It is also thought to be one of the main mechanisms of cell death in ischemic tissues. The effect of prostaglandin $E_1$($PGE_1$) is proven to be useful in the recovery of ischemic changes by inducing vasodilation of peripheral vessels and platelet disaggregation. $PGE_1$ is also known to suppress apoptosis in human liver sinusoidal endothelial cell from ischemia-reperfusion injury. The purpose of this study is to evaluate the effects of $PGE_1$ on the apoptosis in the ischemia reperfusion injury of rat intestine. Thirty Sprague-Dawley rats were used. In control group(N=15), superior mesenteric artery was occluded for 60 minutes and after removing the vessel clamp, it was reperfused for 60 minutes and harvested. In experimental group(N=15), a jejunal flap was also made as in the control group except for the intraarterial administration of the $PGE_1$ right after clamping the artery and removing the clamp. H&E, TUNEL and immunohistochemical stains for p53, bax, and bcl-2 were performed. There were ischemic changes in gross and microscopic findings in both groups. The apoptotic index was significantly lower in the experimental group($1.29{\pm}0.82$(p=0.003)) than in the control group ($2.33{\pm}0.95$). The rat intestinal ischemia apoptosis by ischemia-reperfusion was partly related to the modulating of bcl-2, bax, and p53 expression. Our results indicate that $PGE_1$ suppresses the apoptosis in the ischemic jejunal flap and this effect is probably the result of a increase in expression of bcl-2.
Smilacina japonica is a localized common rhizomatous flowering plant, This plant is often used in Korean traditional systems of medicine as a remedy for migrain, diplegia, physical impurity, blood circulation, abscess and contusion. Generally drugs that are used for arthritis have antinociceptive and anti-inflammatory properties. However, validity of the anti-inflammatory activity has not been scientifically investigated so far. Therefore, the aim of this study was to investigate the anti-inflammatory potential of S. japonica using the ethanolic extract and its subfractions. To evaluate the anti-inflammatory effects, we examined the inflammatory mediators such as nitric oxide (NO) and prostaglandin $E_2$ ($PGE_2$) on RAW 264.7 macrophages. Our results indicated that hexane fraction significantly inhibited the LPS induced NO and $PGE_2$ production in the cells. The hexane fractions inhibitory activity for NO tests with $IC_{50}$ values showed in $53.3{\mu}g/ml$ and $PGE_2$ tests with $IC_{50}$ values showed at $32.5{\mu}g/ml$. Theseis result suggest a potential role of hexane fraction from S. japonica as source of anti-inflammatory agent.
Journal of the Korean Applied Science and Technology
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v.36
no.3
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pp.966-974
/
2019
Arthrospira platensis has been reported to contain a variety of substances such as phycocyanin, ${\beta}$-carotene, vitamin E and other carotenoids. In this study, zebrafish were treated with indoor cultivation spirulina ethanol extracts(ICAE) to determine toxicity(coagulation rate, hatching rate, heart rate). We used the DCFH-DA staining method to detect the effect of reactive oxygen species(ROS) generation on lipopolysaccharide(LPS)-induced zebrafish embryos ROS various concentrations(0.01, 0.05, 0.1, 0.5mg/ml) of ICAE. Cell toxicity was measured by WST-1 assay on RAW 264.7 macrophage cell line. Also, measured the inhibitory effect of nitric oxide(NO) and prostaglandin $E_2$ ($PGE_2$) production in RAW264.7 macrophages induced by LPS at various concentrations of ICAE. The results of embryo coagulation rate, hatching rate, heart rate of zebrafish at various(0.01, 0.05, 0.1mg/ml) of ICAE was no toxicity. The ICAE treated group had an inhibitory effect on NO and $PGE_2$ production compared and decreased with concentration. The results of this study ethanol extract of Arthrospira platensis has an anti-inflammatory effect and suggest that is worthy of use cosmetics for skin protection.
Jang Seon Il;Kim Hyung Jin;Kim Young Jun;Pae Hyun Ock;Chung Hun Taeg;Jeong Ok Sam;Kim Youn Chul;Yun Yong Gab
Journal of Physiology & Pathology in Korean Medicine
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v.17
no.3
/
pp.804-809
/
2003
Kagam-bojungikgitang is the water extracts prepared from Ginseng Radix, Astragali Radix. Angelicae gigantis Radix, Astractylodis Rhizoma alba, Aurantii nobilis Pericarpium, Glycyrrhizae Radix, Artemisiae iwayomogii Herba, and Scutellariae Radix. This is a modified prescription of Bojungikgitang, which has been used for the treatment of indigestion, and immunological disease in oriental countries. In this study, the effects of Kagam-bojungikgitang and Bojungikgitang on the production of prostaglandin E₂ (PGE₂) and the expression of cyclooxygenase-2 (COX-2) were examined using RAW 264.7 macrophages activated with lipopolysaccharide (LPS). Both prescriptions dose-dependently reduced the release of PGE2 and expression of COX-2 caused by stimulation of LPS without cytotoxic effect. Kagam-bojungikgitang's inhibitory effects were better than Bojungikgitang in PGE2 production and COX-2 expression. Moreover, Kagam-bojungikgitang also attenuated markedly the production of tumor necrosis factor (TNF)-α, and IL-6 than Bojungikgitang in LPS-stimulated RAW 264.7 macrophages. These results suggest that Kagam-bojungikgitang decreases PGE2 and pro-inflammatory cytokine production in macrophages and these properties may contribute to the anti-inflammatory activity of Kagam-bojungikgitang.
The alveolar bone remodeling is essential in tooth movement by orthodontic forces. The collagen and chondroitin sulfate are acting as an important roles in bone remodeling. This study was performed to measure out the quantity of the collagen and chondroitin sulfate in the alveolar bone of rats applied by experimental orthodontic forces. The 150 Sprague-Dawley male rats were divided into the $PGE_2$ treated group, indomethacin treated group and the normal group. A 80gm force rubber band was used as a orthodontic appliance between upper incisors and right upper 1st molar, and left side of experimental rats with no appliance was regarded as a control side. The samples of alveolar bones were obtained from pressure and tension sites in all three groups. respectively, and in control sides, too. The results were as follows. 1. The change in total collagen remains stable in both pressure and tension sites of all three groups, compared with control side by the time consuming. 2. The change in soluble collagen showed the most highest level in tension site, lowest level in pressure site of $PGE_2$ treated group in 5th. experimental day. 3. The change in chondroitin sulfate showed the most highest level in pressure site, lowest level in tension site of $PGE_2$ treated group in 5th. experimental day. 4. In indomethacin treated group, the change of soluble collagen and chondroitin sulfate showed small range of variance compared with $PGE_2$ treated and normal group.
A helper T(Th)1-mediated response is known to enhance cell -mediated immunity, while a Th2-mediated response is associated with the humoral immunity that if elevated IgE levels and eosinophilia. Prostaglandin (PG)E$_2$results in the decreased capability of Iymphocytes to produce Thl cytokines, with a shift toward a Th2 cytokine response. Chlorpyrifos (CPF) has been reported to impair the blastogenesis and response of T Iymphocytes. CPF also induces delayed febrile effects, which results from the activation of COX -PGE$_2$pathway. The purpose of this study is to determine the effort of CPF on the in vitro production of Th cytokines and the role of PGE$_2$on the CPF-induced production of Th cytokines. Splenocytes obtained from male BALB/c mice were pretreated with CPF(0.1, 1, 10 and 100$\mu$M) in the presence of absence of indomethacin or PGE$_2$for 12 h and then were incubated with concanavalin (Con) A for 48 h. These results showed that CPF remarkedly reduced the production of splenic interleukin (IL)-2 and interferon (IFN)-γ in a dose-dependent manner. CPF significantly increased the splenic IL-4 production at low doses (0.1 and 1$\mu$M) but did not affect at high doses (10 and 100 $\mu$M). Indomethacin reduced the CPF-decreased production of IL-2 and IFN-γ in a dose -dependent manner and significantly attenuated the production of IL-4 increased by CPF 0.1 $\mu$M. High dose of CPF significantly reduced the PGE$_2$-decreased production of IL-2 and IFN-γ, while the PGE$_2$- induced production of IL-4 was significantly enhanced by CPF 1 $\mu$M. These findings suggest that CPF nay down-regulate the immune response of Th 1 type by the suppressed production of IL-2 and IFN-γ, with a shift toward a Th2 cytokine response. The CPF-decreased production of Thl cytokines may not be mediated by endogenous PGE$_2$. Also, CPF may attenuate the exogenous PGE$_2$-decreased Th 1 immune response in a dose--dependent manner but may affect dose-independently the PGE$_2$-induced Th2 immune response.
In the present study, effects of essential oils isolated from various plants have been evaluated on lipopolysaccharide (LPS)-induced release of nitric oxide (NO), prostaglandin E$_2$(PGE$_2$) and tumor necrosis factor-a (TNF-$\alpha$) by the macrophage RAW 264.7 cells. Among the tested essential oils, essential oil of Ligularia fischeri var. spiciformis (LF-oil) significantly inhibited the LPS-induced generation of NO, PGE$_2$ and TNF-$\alpha$ in Raw 264.7 cells. Consistent with these observations, the expression of inducible NO synthase (iNOS) and cyclooxygenase (COX)-2 enzyme was inhibited by LF-oil in a concentration-dependent manner. Thus, this study suggests that inhibition of release of iNOS, COX-2 expression, and TNF-$\alpha$ by the essential oil of Ligularia fischer may be one of the mechanisms responsible for the anti-inflammatory effects of this medicinal plant.
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