Background: Celecoxib, a COX-2 specific inhibitor, has recently been used for the treatment of rheumatoid arthritis. However, the molecular and cellular mechanisms of celecoxib against RA inflammation remain to be defined. To elucidate the action mechanism of celecoxib on inflammatory cells, we investigated the effect of celecoxib on the production of two important mediators of inflammation, nitric oxide and PGE2 Methods: RAW 264.7 cells stimulated with LPS were preincubated with various concentrations of celecoxib (from $10^{-8}$ to $10^{-5}$ M) and $10{\mu}M$ hydrocortisone, respectively. The production of NO and PGE2, the end products of iNOS and COX-2 genes, were estimated in culture supernatants by Greiss method and EIA, respectively. The expression of iNOS gene, COX-2 gene, $NF-{\kappa}B$, and $I-{\kappa}B$ were determined by RT-PCR and western blot analysis. Results: Celecoxib and hydrocortisone inhibited the production of NO and PGE2 in dose dependent manner, when RAW 264.7 cells were stimulated with LPS. The expression of iNOS was also down-regulated by celecoxib and hydrocortisone. Interestingly, COX-2 gene differentially expressed according to the dose of celecoxib, a decrease with lower dose ($10^{-8}$ M) but an increase with higher dose ($10^{-5}$ M). $NF-{\kappa}B$ binding activity was decreased by lower dose of celecoxib, whereas was not affected by higher dose of it. The expression of $I-{\kappa}B$ was suppressed by higher dose of celecoxib. Conclusion: The celecoxib strongly suppressed the production of NO and PGE2 in LPS-stimulated RAW264.7 cells. The decrease of NO seems to be linked to the inhibition of iNOS by celecoxib. The lower and higher dose of celecoxib differentially regulated the COX-2 expression and $NF-{\kappa}B$ activity.
Lee, Ki Ho;Sim, Mi-Ok;Song, Yong Su;Jung, Ho Kyung;Jang, Ji-Hun;Kim, Min-Suk;Kim, Tae Mook;Lee, Hyo Eun;An, Byeong-Kwan;Jung, Won Seok
Journal of the Korean Society of Food Science and Nutrition
/
v.45
no.5
/
pp.664-670
/
2016
Cheonggukjang (CKJ) is a Korean traditional food made of fermented soybeans. In comparison to normal intake of soybeans, Cheonggukjang has high digestibility with bioactive, antioxidant substances, and thrombolytic enzymes. Recent studies have reported anti-oxidant, anti-cancer, anti-inflammatory, anti-obesity activities as well as inhibitory activities against osteoporosis for CKJ. In this study, we identified the effects of CKJ on osteoblast differentiation by increasing the polyglutamic acid (PGA) content of CKJ. Alkaline phosphatase (ALP) activity and mineralization significantly increased in response to treatment with both natural CKJ (CKJ A) and PGA-increased CKJ (CKJ B). However, CKJ B exhibited higher ALP activity and mineralization than CKJ A. Real-time reverse transcription PCR demonstrated that mRNA expression of osteoblastic-associated genes such as type I collagen, alkaline phosphatase, osteocalcin, and osteopontin in C2C12 cells was significantly up-regulated by CKJ A or B treatment. These results indicate that treatment with CKJ has an anabolic effect on bone by increasing osteoblastic differentiation and ALP activity. Increasing PGA content in CKJ had a greater effect than CKJ A on up-regulation of osteoblastic gene expression in osteoblast cells.
Journal of the Korean Society of Food Science and Nutrition
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v.42
no.1
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pp.26-32
/
2013
Boesenbergia pandurata (Roxb.) Schltr. has been reported to possess anti-oxidative and anti-inflammatory properties. The aim of this study was to investigate the effect of Boesenbergia pandurata extract (BPE) in a high-fat diet (HFD)-induced obese mice model. C57BL/6J mice were fed with either the high-fat diet or a 0.5% BPE-supplemented HFD for 8 weeks. The BPE-containing HFD significantly reduced body weight gain and the accumulation of visceral fat mass in mice model without altering the amount of food intake. Moreover, mice fed with BPE-containing HFD had lower concentrations of lipids in their blood, lower hepatic lipid accumulation, and lower serum leptin levels compared with the HFD-fed mice. RT-PCR analysis showed that the expression levels of peroxisome proliferators-activated receptor ${\gamma}2$ ($PPAR{\gamma}2$) and CCAT/enhancer binding protein ${\alpha}$ ($C/EBP{\alpha}$) genes in the epididymal fat tissue of mice fed the BPE-containing HFD increased 1.16- and 1.30-fold, respectively, compared to mice fed HFD only. In conclusion, BPE attenuated visceral fat accumulation and improved dyslipidemia in a mice model with HFD-induced obesity.
Hong, Su Hyun;Park, Cheol;Han, Min Ho;Kim, Hong Jae;Lee, Moon Hee;Choi, Yung Hyun
Journal of Life Science
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v.24
no.11
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pp.1244-1251
/
2014
Platycodon grandiflorum (PG) has been known to possess many biological effects, including anti-inflammatory and anti-allergy activity and anti-obesity and hyperlipidemia effects. However, little research has been conducted regarding its anticancer effects, with the exception of its ability to stimulate apoptosis in skin cells. There has also been no study regarding PG-induced autophagy. The modulation of autophagy is recognized as one of the hallmarks of cancer cells. Depending on the type of cancer and the context, autophagy can suppress or help cancer cells to overcome metabolic stress and the cytotoxicity of chemotherapy. Therefore, the present study was designed to investigate whether or not extracts from PG-induced cell death were connected with autophagy and apoptosis in HCT-116 human colon cancer cells. PG stimulation decreased cell proliferation in a dose- and time-dependent manner and induced apoptosis, which was partially dependent on the activation of caspases. PG treatment also resulted in the formation of autophagic vacuoles simultaneously with regulation of autophagy-related genes. Interestingly, a PG-mediated apoptotic effect was further triggered by pretreatment with the autophagy inhibitors 3-methyladenin and bafilomycin A1. However, cell viability recovered quite well with bafilomycin A1 treatment. These findings show that PG treatment promotes both autophagy and apoptosis and that PG-induced autophagic response might play a role in the autophagic cell death of HCT-116 cells.
Interleukin (IL)-32 is a recently identified proinflammatory cytokine that is one of the IL-18 inducible genes, and plays an important role in autoimmune and inflammatory diseases. We produced antibodies against IL-32 and studied the expression of IL-32 in human stomach cancer. We detected IL-32 secreted from K-562 cells which were stably transfected with IL-32 and in the sera of stomach cancer patients by a sandwich ELISA using a monoclonal antibody KU32-52 and a polyclonal antibody. In order to optimize a sandwich immunoassay, recombinant IL-32a was added, followed by the addition of a biotinylated KU32-52 into microtiter plate wells precoated with a goat anti-IL-32 antibody. The bound biotinylated KU32-52 was probed with a streptavidin conjugated to HRP. This sandwich ELISA was highly specific and had a minimal detection limit of 80 pg/ml (mean${\pm}$SD of zero calibrator) and measuring up to 3,000 pg/ml. This ELISA showed no cross-reaction with other cytokines such as hIL-1$\alpha$, hIL-1$\beta$, hIL-2, hIL-6, hIL-8, hIL-10, hIL-18, and hTNF-$\alpha$. Intra-assay coefficients of variation were 18.5% to 4.6% (n=10), and inter-assay coefficients were 23% to 9% (n=10). The average IL-32 level in the sera of 16 stomach cancer patients (189 pg/ml) was higher than that of 12 healthy control men (109 pg/ml). Our results indicate that serum IL-32 level can be detected by using an established ELISA, and that this immunoassay and mAb KU32-09 specific for immunohistochemistry can be used in the detection of expressed and secreted IL-32 in stomach cancer patients.
Kim, Eul Soon;Lee, In Kyu;Oh, Myung Ho;Bae, Chong Woo
Clinical and Experimental Pediatrics
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v.46
no.4
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pp.335-339
/
2003
Purpose : Surfactant protein A(SP-A) is involved in surfactant physiology and structure, and plays a major role in innate host defense and inflammatory processes in the lung. Steroid therapy is widely used for mothers who threaten to deliver prematurely and also used commonly in the management of preterm infants with chronic lung disease. Two SP-A genes(SP-A1, SP-A2) and several alleles have been characterized for each SP-A gene in human. Preliminary evidence indicates that differences may exist among alleles in response to Dexamethasone(Dexa) and that the SP-A 3'UTR plays a role in this process. We studied whether 3'UTR-mediated differences exist among the most frequently found SP-A alleles in response to Dexa. Methods : Constructs containing the 3'UTR from eight different SP-A alleles were made using luciferase as a the reporter gene. These constructs were driven by the SV40 promotor and were transfected along with a transfection control vector in H441 cells that express SP-A. The activity of the reporter gene in the presence or absence of Dexa(100 nM) treatment was measured. All the experiments for the eight SP-A alleles studied, were performed in triplicate and repeated five times. The results were normalized to the transfection control. Results : Expression of alleles of 6A3, 6A, 1A were significantly decreased in response to Dexa. Conclusion : Three UTR mediated differences exist among human SP-A variants both in the basal expression and in response to Dexa. These genotype-dependent differences may point to a need for a careful consideration of individual use of steroid treatment in the prematurely born infant.
Kim, Jae Kwang;Park, Sang Mi;Jegal, Kyung Hwan;Kim, Young Woo;Byun, Sung Hui;Kim, Sang Chan;Cho, Il Je
The Korea Journal of Herbology
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v.30
no.4
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pp.57-64
/
2015
Objectives : Oxidative stress is one of the most causes of hepatocyte injury. Gleditsia spina, the thorns ofGleditsia sinensisLam., has been known for its anti-cancer and anti-inflammatory effects in Korean medicine. The present study investigated hepatoprotective effect of Gleditsia spina water extract (GSE) against oxidative stress induced by arachidonic acid (AA) + iron in HepG2 cells.Methods : To investigate cytoprotective effect of GSE, cells were pretreated with GSE and then subsequently exposed to 10 μM AA for 12 h, followed by 5 μM iron. Cell viability was monitored by MTT assay, and expression of apoptosis-related proteins was examined by immunoblot analysis. To identify responsible molecular mechanisms, reactive oxygen species (ROS) production, GSH contents, and mitochondrial membrane potential were measured. In addition, effect of GSE on nuclear factor erythroid 2-related factor 2 (Nrf2) activation was determined by immunoblot and antioxidant response element (ARE)-driven reporter gene assays.Results : GSE pretreatment prevented AA + iron-mediated cytotoxicity in concentration dependent manner. In addition, ROS production, glutathione depletion, and mitochondrial impairment by AA + iron were significantly inhibited by GSE. Furthermore, GSE promoted translocation of Nrf2 to nucleus, which acts as essential transcription factor for induction of antioxidant genes. Increased nuclear Nrf2 that caused by GSE treatment promoted transcriptional activity of ARE. Finally, GSE up-regulated sestrin-2 which was widely recognized as target gene of Nrf2.Conclusions : This study demonstrates that GSE protects hepatocytes from oxidative stress via activation of Nrf2 signaling pathway.
Purpose : Febrile seizure (FS) is the most common type of seizure. The role of genetic factors in FSs has long been recognized. A positive family history can be elicited in 25-40% of patients with FSs; nonetheless, the genes responsible for FSs in the majority of the population remain unknown. Interleukin-$1{\beta}$ ($IL-1{\beta}$) is a pro-inflammatory cytokine that acts as an endogenous pyrogen. Thus, $IL-1{\beta}$ could be involved in the pathophysiology of FSs. Methods : To determine whether or not single nucleotide polymorphisms of the $IL-1{\beta}$ gene are associated with susceptibility to simple FSs, $IL-1{\beta}$ promoter -31 and -511 genotyping was performed by means of polymerase chain reaction-restriction fragment (PCR-RF) length polymorphism in 40 FS patients (20 sporadic and 20 familial FS patients) and 33 controls. Results : There were no significant differences in the frequencies of -31 C/T and -511 C/T in the $IL-1{\beta}$ promoter gene, between simple FS patients and controls. Conclusion : The frequency of CT/CT increased relatively in familial FS patients. A study examining a larger number of FS patients is needed.
Journal of the Korean Society of Food Science and Nutrition
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v.43
no.5
/
pp.749-755
/
2014
Exopolysaccharides (EPSs) have been widely used in the food industry as viscofying, stabilizing, and emulsifying agents as well as in the pharmaceutical industry for their immunomodulatory, anti-tumor, and anti-inflammatory effects. A total of 458 lactic acid bacteria (LAB) strains isolated from several kinds of soybean pastes were screened for the production of homo-EPS (HoPS). LAB isolates were primarily screened using thin layer chromatography (TLC) and further screened polymerase chain reaction (PCR) targeting genes involved in HoPS production. Six LAB isolates producing high amounts of HoPS were identified by TLC. Among these isolates, glucansucrase gene was amplified in two strains (JSA57, JSB22), whereas the fructansucrase gene was detected in three strains (JSA57, JSB22, JSB66). After isolating the strains, their morphological characteristics and 16S rDNA sequences were determined. Six species were identified as L. alimentarius HSB15, L. plantarum JSA22, L. pentosus JSA57, L. brevis JSB22, L. alimentarius JSB66, and L. parabrevis JSB89. To evaluate the potential probiotic properties of these LAB, their survival rates against a simulated intestinal environment were determined. After 2 hr of incubation in artificial gastric juice, survival rates of JSA57, JSB90, JSB22, and JSB66 were all greater than 50%. After 2 hr of incubation in bile juice, viable cell count of JSB22 was similar with initial vial cell counts. Growth of the six LAB was screened in arabino-oligosaccharide (AOS)-containing MRS broth. Results showed that growth of the isolates selectively increased after culture in AOS-containing media. Strain JSB22 (6 hr), JSB66 (6 hr), HSB15 (20 hr), and JSA22 (29 hr) showed maximum growth rate. Especially, JSB22 showed the highest growth rate. These results suggest that EPS-producing LAB isolated from Deonjang could be applied as synbiotics.
Lee, Chang Hyun;Kim, Nam Seok;Choi, Dong Seong;Oh, Mi Jin;Ma, Sang Yong;Kim, Myoung Soon;Ryu, Seung Jeong;Kwon, Jin;Shin, Hyun Jong;Oh, Chan Ho
Journal of Physiology & Pathology in Korean Medicine
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v.28
no.1
/
pp.35-44
/
2014
This study was performed to investigate the anti-photoaging effects of Persimmon leaf tea(PLT) in hairless mice(SKH-1) exposed to UVB radiation. The animals were divided into non-treated group (normal, N) and UV-radiated groups. UV-radiated groups were divided into only UV-radiated group(control, C) and UV-radiated and PLT treated experimental groups[first extraction treated group(PLT-I), second extraction treated groupe(PLT-II), and third extraction treated group(PLT-III)]. Three PLT treated experimental groups of mice were treated with both oral administration(300mg/Kg B.W./day) and topical application (100 ul of 2% conc./mouse/day) for 4 weeks. Anti-photoaging effects of Persimmon leaf were evaluated by MTT assay, anti oxidative reaction, MMP immunohistochemistry, gelatin zymography assay and RT-PCR observations. Treatment with Persimmon leaf tea(PLT)-I, and -III groups decreased immunohistochemical density of matrix metalloproteinases(MMP)-3 and -9 related to degradation of extracellular matrix in skin. Especially, immunohistochemical density of MMP-2 decreased in PLT-I, -II and -III groups in skin. On the effects of antioxidant function on the treatment with Persimmon leaf tea(PLT), treatment of HaCaT cells with extracts of PLT-I and PLT-II had also significantly reduced intracellular ROS produced by UVB irradiation in a dose dependent manner(PLT-I, p<0.05, p<0.01, p<0.001; PLT-II, p<0.01, p<0.001). Gelatin zymography assay revealed that PLT-II and PLT-III (200 ug/ml) had inhibitory effect on MMP-9 expression in UVB-radiated HaCaT cells. Western blot analysis revealed that PLT-1, -II and -III groups down-regulates the expression of inflammatory associated genes(IL-$1{\beta}$) and PLT-1 and -II groups down-regulates the expression of TNF-${\alpha}$ in a dose dependent manner. Our study suggests that Persimmon leaf tea(PLT) extracts participates in inhibitory effects on the morphological and molecular experiments related to photoaging skin on UVB irradiated hairless mice.
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