• Korean Journal of Pharmacognosy
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• v.34 no.1 s.132
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• pp.25-27
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• 2003

In order to clarify the anti-thrombosis activity of rhubarb, we investigated the effect of stilbene derivatives from rhizomes of Rheum undulatun on cyclooxygenase activity. Stilbene derivatives (desoxyrhapontigenin, rhapontigenin, piceatannol) exhibited the inhibitory effects on COX-1, and desoxyrhapontigenin showed inhibitory effect on COX-2. These inhibitory effect may partially contributed to anti-thrombosis activity of rhubarb.

• Biomedical Science Letters
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• v.18 no.3
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• pp.319-323
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• 2012

In recent years, egg allergy has been raised as the most prevalent food hypersensitivity in the pediatric population. One of the major egg allergens is ovalbumin (OVA) which is the major protein in egg white, comprising 54% of its total protein content. Parthenolide isolated from Tanacetum partheniumb has been used to treat many chronic diseases for many years. In the present report, we present biochemical evidence that parthenolide inhibits the nuclear factor-${\kappa}B$ (NF-${\kappa}B$) activation induced by OVA. Parthenolide also inhibits OVA-induced cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) expression. These data suggest new approaches for the efficient alleviation of the allergic symptoms.

• Biomedical Science Letters
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• v.19 no.3
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• pp.270-274
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• 2013

Egg allergy has been raised as the most prevalent food hypersensitivity in children. Ovalbumin (OVA), which is one of the major egg allergens, is the major protein in egg white. Isoliquiritigenin (ILG) is an active component present in licorice and has been used to treat many chronic diseases for many years. In this study, we present biochemical evidence that ILG inhibits OVA-induced nuclear factor-${\kappa}B$ (NF-${\kappa}B$) activation. ILG also inhibits OVA-induced cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) expression. These data suggest that ILG has anti-allergy effects.

• Proceedings of the Korean Society of Toxicology Conference
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• 2003.10b
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• pp.139-140
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• 2003

Inflammatory as well as oxidative tissue damage has been implicated in pathophysiology of Alzheimer's disease (AD), and non-steroidal anti-inflammatory drugs have been reported to have beneficial effects in the treatment or prevention of AD. In the present study, we investigated the effect of celecoxib, a selective cyclooxygenase-2 (COX-2) inhibitor, on inflammatory cell death induced by beta-amyloid, a neurotoxic peptide associated with senile plaques formed in the brains of patients with AD.(omitted)

• Journal of Applied Biological Chemistry
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• v.62 no.2
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• pp.149-155
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• 2019

Elicitor treatment was performed to increase the anti-inflammatory activity of useful biological sources. The result showed that elicitor-treated Saururus chinensis leaf extracts positively affected nitric oxide (NO) production, and the expression of inducible NO synthase and cyclooxygenase-2 compared to extracts not exposed to elicitor treatment. This finding identified elicitor treatment as a suitable strategy for increasing the biological activity of S. chinensis. Therefore, elicitor-treated S. chinensis is useful both as health functional and medicinal materials.

• Proceedings of the PSK Conference
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• 2003.10b
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• pp.216.1-216.1
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• 2003

P. ginseng C.A. Meyer is one of the most widely used herbal medicine in Asia. It has been used for the treatment of many disorders. Its major constituent is known to be ginsenosides, and there are many documents about bioactivities of ginsenosides such as anti-oxidant, anti-tumorigenic, anti-fatigue, and anti-inflammatory activities. Some of these activities are supposed to have some correlation with inhibitory action of cyclooxygenase (COX). Ginsenosides from P. ginseng and sapogenins were evaluated for their inhibitory effects against both cyclooxygenase-1 and -2 (COX-1 and -2). Inhibitory activity was evaluated by measuring prostaglandin E$_2$ (PGE$_2$) production from arachidonic acid with an ELISA reader. (omitted)

• Journal of Physiology & Pathology in Korean Medicine
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• v.19 no.3
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• pp.749-752
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• 2005

We investigated the effects of electroacupuncture (EA) on the expression of cyclooxygenase in the spinal cord of acute inflammatory pain model. Inflammation was induced by an intraplantar injection of 1% carrageenan into the right hind paw of Sprague-Dawley. Bilateral 2 Hz EA stimulation with 0.5 mA, 1 mA and 3 mA were delivered at those acupoints corresponding to Zusanli and Sanyinjiao in man via the needles in carrageenan-injected rats. Three hours after carrageenan injection, effects of EA on cyclooxygenase (COX) expression were observed in the dorsal horn of the spinal cord using immunohistochemical method. The immunoreaction of COX-1 tended to increase in the superficial laminae and the neck of the dorsal horn as compared with normal. The COX-2 immunoreaction in the carrageenan-injected rat was also significantly increased in the all regions of the dorsal horn as compared with normal one. However, COX-1 immunoreaction in carrageenan-injected rat were decreased in the superficial laminae and neck of the dorsal horn by low intensity of EA stimulation. Except high intensity of EA stimulation in the superficial laminae, COX-2 expression was attenuated in all regions of the dorsal horn by all types of EA treatment. It is concluded that EA treatment may attenuate inflammatory pain in carrageenan-injected rat through modulating expression of COX-2 in the dorsal horn of the spinal cord.

• Journal of Yeungnam Medical Science
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• v.23 no.1
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• pp.36-44
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• 2006

Background: There is controversy regarding whether COX-2 specific inhibitors are associated with elevation of blood pressure. We compared the effects of aspirin, indomethacin, and celecoxib for vascular reactivity induced by phenylephrine. We also tested the effects of indomethacin and NO donor on COX-1 and COX-2 protein expression, as well as nitrite production in culture medium of vascular smooth muscle cells. Materials and Methods: In this experiment, we used the isometric tension study for vascular reactivity. After 45 minutes of pretreatment with aspirin, indomethacin, celecoxib, and phenylephrine induced contractions were tested. COX-1 and COX-2 protein expressions were analyzed by Western blot and nitrite production by the Griess reaction. Results: Although celecoxib pretreatment caused enhanced arterial contraction, aspirin pretreatment induced more potent arterial contraction than celecoxib in the isometric tension study of rabbit femoral artery. COX-1 protein expression was unchanged by indomethacin, SNP and NOR-3; COX-2 protein expression was increased by the addition of indomethacin, SNP, and NOR-3. Especially, NOR-3, a NO donor, significantly increased COX-2 protein expression with unstimulated conditions as well as LPS stimulation. Induction of nitrite production was higher with NOR-3 treatment than SNP treatment with LPS stimulation. Conclusion: These results suggest that aspirin caused more potent vascular contraction than celecoxib and indomethacin. COX-2 expression in VSMC depended on the types of NO donor and LPS stimulation.

• Proceedings of the Korean Society of Toxicology Conference
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• 2002.05a
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• pp.103-104
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• 2002

Cyclooxygenase (COX), an important enzyme involved in mediating the inflammation, catalyzes the rate-limiting step in the formation of prostaglandins from arachidonic acid. There are two isoforms of COX, designated as COX-1 and COX-2. While COX-1 is constitutively expressed in most tissues, COX-2 can be induced transiently by proinflammatory cytokines, endotoxins, growth factors, oncogenes, UV and mitogens.(omitted)

• The Korean Journal of Physiology and Pharmacology
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• v.19 no.3
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• pp.257-262
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• 2015

It is well known that cigarette smoke can cause erectile dysfunction by affecting the penile vascular system. However, the exact effects of nicotine on the corpus cavernosum remains poorly understood. Nicotine has been reported to cause relaxation of the corpus cavernosum; it has also been reported to cause both contraction and relaxation. Therefore, high concentrations of nicotine were studied in strips from the rabbit corpus cavernosum to better understand its effects. The proximal penile corpus cavernosal strips from male rabbits weighing approximately 4 kg were used in organ bath studies. Nicotine in high concentrations ($10^{-5}{\sim}10^{-4}M$) produced dose-dependent contractions of the corpus cavernosal strips. The incubation with $10^{-5}M$ hexamethonium (nicotinic receptor antagonist) significantly inhibited the magnitude of the nicotine associated contractions. The nicotine-induced contractions were not only significantly inhibited by pretreatment with $10^{-5}M$ indomethacin (nonspecific cyclooxygenase inhibitor) and with $10^{-6}M$ NS-398 (selective cyclooxygenase inhibitor), but also with $10^{-6}M$ Y-27632 (Rho kinase inhibitor). Ozagrel (thromboxane $A_2$ synthase inhibitor) and SQ-29548 (highly selective TP receptor antagonist) pretreatments significantly reduced the nicotine-induced contractile amplitude of the strips. High concentrations of nicotine caused contraction of isolated rabbit corpus cavernosal strips. This contraction appeared to be mediated by activation of nicotinic receptors. Rho-kinase and cyclooxygenase pathways, especially cyclooxygenase-2 and thromboxane $A_2$, might play a pivotal role in the mechanism associated with nicotine-induced contraction of the rabbit corpus cavernosum.