• Parasites, Hosts and Diseases
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• 제54권5호
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• pp.679-684
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• 2016

Clonorchiasis, caused by direct contact with Clonorchis sinensis worms and their excretory-secretory products (ESPs), is associated with chronic inflammation, malignant changes in bile ducts, and even cholangiocarcinogenesis. Our previous report revealed that intracellular free radicals enzymatically generated by C. sinensis ESPs cause NF-${\kappa}B$-mediated inflammation in human cholangiocarcinoma cells (HuCCT1). Therefore, the present study was conducted to examine the role of upstream Toll-like receptors (TLRs) on the initial host innate immune responses to infection. We found that treatment of HuCCT1 cells with native ESPs induced changes in TLR mRNA levels in a time-dependent manner, concomitant with the generation of free radicals. ESP-mediated free radical generation was markedly attenuated by preincubation of the cells with TLR1-4-neutralizing antibodies, indicating that at least TLR1 through 4 participate in stimulation of the host innate immune responses. These findings indicate that free radicals triggered by ESPs are critically involved in TLR signal transduction. Continuous signaling by this pathway may function in initiating C. sinensis infection-associated inflammation cascades, a detrimental event leading to progression to more severe hepatobiliary diseases.

• Preventive Nutrition and Food Science
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• 제19권4호
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• pp.261-267
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• 2014

As a part of ongoing research to elucidate and characterize antioxidant and anti-inflammatory nutraceuticals, solvent-partitioned fractions from Spergularia marina were tested for their ability to scavenge radicals and suppress inflammation. The results of the 2',7'-dichlorofluorescein diacetate assay indicate that solvent-partitioned fractions from S. marina scavenged intracellular radicals in $H_2O_2$-stimulated mouse macrophages. The tested fractions decreased the generation of nitric oxide (NO) and the expression of inflammation mediators, namely, inducible nitric oxide synthase (iNOS) and interleukin (IL)-6, by lipopolysaccharide (LPS)-induced mouse macrophages, indicating that S. marina decreases inflammation. Among all tested fractions [i.e., $H_2O$, n-buthanol (n-BuOH), 85% aqueous methanol (aq. MeOH), and n-hexane], the 85% aq. MeOH fraction showed the strongest antioxidant and anti-inflammatory response. The 85% aq. MeOH fraction scavenged 80% of the free radicals produced by $H_2O_2$-induced control cells. In addition, NO production was 98% lower in 85% aq. MeOH fraction-treated cells compared to LPS-induced control cells. The mRNA expression of iNOS and IL-6 was also suppressed in 85% aq. MeOH fraction-treated cells. The results of the current study suggest that the phenolic compound components of S. marina are responsible for its antioxidant and anti-inflammatory effects.

• Journal of Acupuncture Research
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• 제15권2호
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• pp.135-145
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• 1998

Bupleury radix has been used for the treatment of fever, liver disease, inflammation in traditional medicine. The present study was carried out to evaluate the antioxidant effects of Bupleury radix aqua-acupuncture solution (BRAS) in vitro. Oxygen derived free radicals produced in the course of normal aerobic life, such as superoxide anion radical($O_2^-$ ), hydroxyl radicaI( OH), hydrogen peroxide($H_2O_2$) and singlet oxygen($^1O_2$) can attack polyunsaturated fatty acid in cell membranes, enzymes, other cell compounds, and give rise to lipid peroxidation, DNA damage, lipofuscin accumulation, structure alteration of cell membrane and cell death. In this study, antioxidant effects of BRAS on lipid peroxidation were determined according to the method of TBA. BRAS inhibited markedly peroxidation of linoleic acid during the autoxidation, and also inhibited lipid peroxidation induced by hydroxyl radical derived from $H_2O_2-Fe^{2+}$ in rat liver homogenate. And BRAS showed 30% scavenging effect on DPPH radical, also exhibited a 30% inhibitory effect on superoxide generation from xanthine-xanthine oxidase system. In addition, BRAS protected the cell death induced by tert-butyl hydroperoxide(t-BHP) and significantly increased cell viability in the normal rat liver cell(Ac2F).

• 대한약침학회지
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• 제6권1호
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• pp.67-72
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• 2003

Bee venom has been clinically used to control the pain of inflammation disease etc. in general. Although the effect of bee venom herbal acupuncture has been reported, its mechanism has not been fully elucidated yet. Free radical metabolism seems to occupy a remarkably common position in the mechanisms of inflammation and ageing related disease. Oxidative damage to DNA, lipids, proteins and other molecules may contribute to the development inflammation disease. NO or DPPH is one of the free radicals and a mediator in inflammation diseases. The objective of this study is to investigate the scavenging effect of bee venom herbal acupuncture against NO and DPPH. The followings are the summary of the results: (1) There is no significant scavenging effect of bee venom herbal acupuncture on NO in BVS and BVP group. (2) There is a significant scavenging effect of bee venom herbal acupuncture on DPPH in BVS-1 and BVP-1 group. These results suggest that bee venom herbal acupuncture can be used for inflammation diseases such as rheumatoid arthritis. This study would provide important basic data on the possibility of the clinical treatment of bee venom herbal acupuncture. Further studies are required to investigate the antioxidative effects of it.

• 대한예방한의학회지
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• 제1권1호
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• pp.48-54
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• 1997

Scutellariae radix, has been used as a natural drug for fever, inflammation, cataract, and liver disease in traditional medicine. This study was performed in order to investigate the antioxidative effects of Scutellariae radix aqua-acupuncture solution (SRAS) on lipid peroxidation by free radicals. Lipid peroxidation levels were determined by TBA method during the autoxidation of linoleic acid. In this linoleic acid autoxidation system, SRAS markedly exhibited antioxidant activity, which inhibited 89% of linoleic acid peroxidation. SRAS showed scavenging effects on ${\alpha},{\alpha}-diphenyl-{\beta}-picrylhydrazyl$(DPPH) radical, inhibited superoxide generation in xanthine-xathine oxidase system, and also inhibited lipid peroxidation of rat liver tissue by hydroxyl radical derived from $H_2O_2-FE^{+2}$ system. These effects were similar to those of $dl-{\alpha}-tocopherol$, BHA and BHT. In addition, SRAS protected the cell death induced by ter-butyl hydroperoxide (t-BHP) and significantly increased cell viability in the normal rat liver cell (Ac2F). On the basis of these results, it is suggested that SRAS might play a protective role in lipid peroxidation by free radicals.

• Toxicological Research
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• 제20권3호
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• pp.179-185
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• 2004

Helicobacter pylori (H. pylori) infects more than half of the people in the world as a major microbe to cause most of gastric diseases. Recently, cytotoxin associated-antigen A (CagA) is believed as one of the most important virulence factors of H. pylori. Molecular toxicological pathway of CagA is necessary to investigate for understanding the pathological and toxicological aspects of H. pylori, since this virulence protein harasses intercellular processes of host cells to get profit for the survival of H. pylori. CagA is coded from cag pathogenicity island (cag PAI) and translocated into host cells by Type 4 secretion system (TFSS). Tyrosine phosphorylation of CagA targets Src homology 2-containing phosphotyrosine phosphatase (SHP-2) to form a CagA-SHP-2 complex. This complex depends on the similarity of sequence between EPIYA motif and Src homology 2 domain (SH2 domain) of CagA. The generation of growth factors is an essential role of CagA in protecting and healing gastric mucosa for the survival of H. pylori. On the other hand, the activation of IL-8 by CagA induces neutrophils generating inflammation and free radicals. Indeed, free radicals are well known carcinogen to induce DNA damage. In addition, the transduction of mitogen-activation signal by CagA is one of the interesting features to understand how to cause cancer. The relationship between cancer and inflammation with CagA was mainly discussed in this review.

• 한국자원식물학회지
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• 제27권3호
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• pp.223-228
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• 2014

Magnoflorine, an important compound in Aristolochia, was usually used as an anxiolytic chemical. In this study, the magnoflorine was isolated from Aristolochia and the biological activities such as antioxidant, ${\alpha}$-tyrosinase inhibitory, anti-inflammatory, and anticancer activities were investigated. The magnoflorine showed significant antioxidant activity as a 2,2-diphenyl-2-picryl-hydrazyl (DPPH) free radical scavenger, $50{\mu}g/mL$ of the magnoflorine scavenged about 70.8% of all the free radicals. And it was good at ${\alpha}$-tyrosinase inhibiting, $100{\mu}g/mL$ of the magnoflorine inhibited 36.5% of the tyrosinase. High dosage of magnoflorine inhibited the inflammation production nitric oxide (NO), and the magnoflorine protected the murine macrophage cells (RAW 264.7) from LPS-induced apoptosis. The cell viability of human colon cancer calls (HT-29) was around 100% when treated with different dose of magnoflorine, it's suggesting that magnoflorine had no anticancer effect.

• BMB Reports
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• 제34권5호
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• pp.463-471
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• 2001

The bark of Ulmus darvidiana var. japonica Nakai (UDN) has been used for a long time to cure inflammation in oriental medicine. In the present study, two types of extracts, Ulmus water-eluted fraction (UWF) and Ulmus ethanol-eluted fraction (UEF), were prepared from the UDN stem bark, and employed to test the extracts to see if they had anti-oxidative properties against hydroxyl radicals that could alter immune reactivity in mouse immune cells. Deoxyribose assay, DNA nicking assay, and glucose/glucose oxidase assay showed that both fractions had scavenging activity against oxygen free radicals at 50 mg/ml. In addition, hydroxyl radical-mediated apoptosis in mouse thymocytes was not protected by UEF treatment, but the apoptosis was protected by UWF at the same concentration. DNA synthesis and cytokine production that were induced in splenocytes by mitogens (Concanavalin A and lipopolysaccharide) were reduced by the addition of both fractions. These results indicate that both extracts that were prepared from the UDN stem bark have anti-oxidative activities, anti-apoptotic effects, and inhibitory effects on DNA synthesis and cytokine production in mouse immune cell cultures.

• Biomolecules & Therapeutics
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• 제22권5호
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• pp.420-425
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• 2014

Esophageal reflux of gastric contents causes esophageal mucosal damage and inflammation. Recent studies show that oxygen-derived free radicals mediate mucosal damage in reflux esophagitis (RE). Chlorogenic acid (CGA), an ester of caffeic acid and quinic acid, is one of the most abundant polyphenols in the human diet and possesses anti-inflammatory, antibacterial and anti-oxidant activities. In this context, we investigated the effects of CGA against experimental RE in rats. RE was produced by ligating the transitional region between the forestomach and the glandular portion and covering the duodenum near the pylorus ring with a small piece of catheter. CGA (10, 30 and 100 mg/kg) and omeprazole (positive control, 10 mg/kg) were administered orally 48 h after the RE operation for 12 days. CGA reduced the severity of esophageal lesions, and this beneficial effect was confirmed by histopathological observations. CGA reduced esophageal lipid peroxidation and increased the reduced glutathione/oxidized glutathione ratio. CGA attenuated increases in the serum level of tumor necrosis factor-${\alpha}$, and expressions of inducible nitric oxide synthase and cyclooxygenase-2 protein. CGA alleviates RE-induced mucosal injury, and this protection is associated with reduced oxidative stress and the anti-inflammatory properties of CGA.

• 한국환경보건학회지
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• 제32권5호
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• pp.492-498
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• 2006

Ultraviolet(UV) radiation causes a variety of biological effects on the skin, including inflammation, pigmentation, photoaging and cancer. Free radicals are involved in inflammatory skin reactions induced by UVB radiation. In this study, we investigated the effects of antioxidants(Tea, Korean red ginseng, Ginkgo biloba extract) on UVB-induced skin damage. Tea, KRG and EGb 761 were topically treated to dorsal skin of ICR mouse. The mice were also treated soon after IMED ($1.4KJ/m^{2}$) of UVB irradiation. Skin pigmentation of irradiated mouse was observed by a chromameter after 2 weeks. Topical application of Tea, KRG and EGb 761 for 2 weeks decreased skin pigmentation compared to DVB control group(p<.05). Tea, KRG and EGb 761 also reduced UVB-induced infiltration of inflammatory cells. These results showed that Tea, KRG and EGb 761 as a topical application may have preventive effect against UVB-induced skin damage.