• 대한영양사협회학술지
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• 제25권3호
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• pp.217-228
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• 2019

There have been no published studies concerning the anti-inflammatory effects of corn silk on colon cancer cells. Thus, this study was conducted to investigate the effect of corn silk extract containing high levels of maysin on inflammation and its mechanism of action in colon cancer cells. SW 480 human colon cancer cells were treated with $1{\mu}g/mL$ of lipopolysaccharide (LPS) to induce inflammation, and next they were treated with different concentrations of corn silk extract (0, 5, 10 and $15{\mu}g/mL$). The concentrations of nitric oxide (NO) were determined. The mRNA expressions of inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), tumor necrosis factor ${\alpha}$ ($TNF-{\alpha}$), interleukin-1beta ($IL-1{\beta}$) and interleukin-6 (IL-6), were determined. Western blot analysis was performed to determine the protein expressions of nuclear factor-kappa B ($NF-{\kappa}B$) and mitogen-activated protein kinases, and the latter consists of extracellular signal-related kinase (ERK), c-jun NH2-terminal kinase (JNK) and p38 MAP kinase (p38). The concentration of NO and the mRNA expression of iNOS were significantly and dose-dependently decreased in the corn silk-treated groups (P<0.05). The mRNA expression of $TNF-{\alpha}$, $IL-1{\beta}$ and IL-6 were significantly increased in the LPS-treated group (P<0.05), but these expressions were significantly and dose-dependently decreased in the corn silk treated groups (P<0.05). The protein expressions of $NF-{\kappa}B$ (in a dose-dependent fashion), ERK (at 10 and $15{\mu}g/mL$), JNK (at $15{\mu}g/mL$) and p38 (at 10 and $15{\mu}g/mL$) were significantly decreased with corn silk treatments (P<0.05). In conclusion, corn silk extract containing high levels of maysin seems to inhibit the LPS-induced inflammatory responses in SW480 colon cancer cells via the $NF-{\kappa}B$ pathway.

• The Korean Journal of Physiology and Pharmacology
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• 제2권3호
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• pp.377-384
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• 1998

Gold compounds depress phagocytic cell responses, including chemotaxis, and respiratory burst. However, the effects of gold compounds on the function of phagocytic cells are variable according to the preparation of medicine. In this study, effect of tetrachloroauric acid on activated neutrophil responses, including respiratory burst, lysosomal enzyme release and change of intracellular $Ca^{2+}$ level and on the synthesis of interleukin-8 and granulocyte-macrophage colony stimulating factor by macrophages was studied. This study further examines how gold compounds affect the activation processes. The respiratory burst stimulated by complement C5a, degraded IgG and PMA in neutrophils was inhibited by tetrachloroauric acid. In contrast to C5a and degraded IgG, PMA-stimulated superoxide production was weakly inhibited by tetrachloroauric acid. Staurosporine, genistein, EGTA and verapamil inhibited superoxide and $H_2O_2$ production caused by C5a and degraded IgG. PMA-stimulated superoxide production was inhibited by staurosporine but was not affected by genistein. Tetrachloroauric acid, genistein, EGTA and verapamil inhibited the release of acid phosphatase and myeloperoxidase, while the effect of staurosporine was not detected. The synthesis of interleukin-8 and granulocyte-macrophage colony stimulating factor by $interleukin-1{\beta}$ in macrophages was inhibited by tetrachloroauric acid. Preincubation with tetrachloroauric acid, genistein, EGTA and verapamil, the elevation of [$Ca^{2+}_i$] evoked by C5a was inhibited. Store-regulated $Ca^{2+}$ entry in thapsigargin-pretreated neutrophils was decreased by the addition of tetrachloroauric acid and genistein. The effect of staurosporine on intracellular $Ca^{2+}$ mobilization was not observed. In conclusion, tetrachloroauric acid may suppress neutrophil responses through its inhibitory action on elevation of intracellular $Ca^{2+}$ level and protein kinase C. It might exhibit an inhibitory effect on the action of protein tyrosine kinase. Tetrachloroauric acid depresses cytokine production by macrophages.

• Molecules and Cells
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• 제42권10호
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• pp.702-710
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• 2019

Neuroinflammation is an important contributor to the pathogenesis of neurodegenerative disorders including Parkinson's disease (PD). We previously reported that our novel synthetic compound KMS99220 has a good pharmacokinetic profile, enters the brain, exerts neuroprotective effect, and inhibits $NF{\kappa}B$ activation. To further assess the utility of KMS99220 as a potential therapeutic agent for PD, we tested whether KMS99220 exerts an anti-inflammatory effect in vivo and examined the molecular mechanism mediating this phenomenon. In 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-treated mice, oral administration of KMS99220 attenuated microglial activation and decreased the levels of inducible nitric oxide synthase and interleukin 1 beta ($IL-1{\beta}$) in the nigrostriatal system. In lipopolysaccharide (LPS)-challenged BV-2 microglial cells, KMS99220 suppressed the production and expression of $IL-1{\beta}$. In the activated microglia, KMS99220 reduced the phosphorylation of $I{\kappa}B$ kinase, c-Jun N-terminal kinase, and p38 MAP kinase; this effect was mediated by heme oxygenase-1 (HO-1), as both gene silencing and pharmacological inhibition of HO-1 abolished the effect of KMS99220. KMS99220 induced nuclear translocation of the transcription factor Nrf2 and expression of the Nrf2 target genes including HO-1. Together with our earlier findings, our current results show that KMS99220 may be a potential therapeutic agent for neuroinflammation-related neurodegenerative diseases such as PD.

• 대한치과교정학회지
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• 제32권2호통권91호
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• pp.129-142
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• 2002

사회적, 경제적 여건의 향상으로 성인들의 교정치료에 대한 관심이 커지고 있지만 폐경기 여성에 있어서 골다공증의 증가는 교정치료에 제한이 되며, 골다공증과 카페인과의 관련 여부는 최근까지 논란이 되고 있다. 따라서 본 연구의 목적은 생후 1일된 마우스의 골모세포를 in Vitro상에서 카페인과 칼슘 및 이 둘을 혼합 처리하여 골모세포의 활성에 미치는 영향에 대해 알아보고자 하였다. 실험에 사용한 골모세포는 마우스의 두개관에서 얻었으며, 카페인 단독 처리, 칼슘 단독 처리, 카페인과 칼슘의 혼합처리를 시행하였다. 카페인 처리를 한 경우 1일, 2일, 4일째 세포 독성 정도를 570 nm ELISA로 분석을 시행하였고, 카페인, 칼슘 및 혼합 처리시 배양 후 28일째 Von Kossa staining 후 영상분석기에 의해 광화된 골결절의 밀도를 측정하였으며, 염기성 인산분해효소 활성도 변화를 배양 후 2일, 7일, 14일, 21일, 28일째 405 nm spectrophotometer로 측정하였고, IL-1 ${\beta}$의 활성도를 48시간 후 492 nm ELISA로 분석을 시행하였다. 얻어진 수치들은 ANOVA test로 통계 분석하였다. 1. 카페인에 대한 세포 독성은 카페인의 농도가 1.0 mM, 2.0 mM로 증가함에 따라, 2일, 4일로 배양 기간이 길어짐에 따라 유의하게 증가하였고, 세포수는 감소하였다. 2. 광화된 골결절의 밀도는 카페인을 단독 처리한 경 우 0.2 mM에서, 칼슘 단독 처리시에는 1.2 mM에서, 혼합 처리한 경우 0.1 mM 카페인과 1.8 mM 칼슘에서 가장 크게 나타났다. 3. 염기성 인산분해효소 활성도는 비처리시 칼슘과 같이 14일째 최대값을 보이는 반면, 카페인을 단독 처리한 경우 농도가 증가함에 따라 활성도가 증가하였다. 카페인과 칼슘 혼합 처리시에는 칼슘 농도가 1.2 mM, 1.8 mM인 경우 배양 14일에 염기성 인산분해효소의 활성도가 유의하게 증가하였으나, 2.5 mM인 경우 활성도가 감소하였다. 4. II-1 ${\beta}$의 활성도는 카페인을 단독 처리한 경우 0.2 mM, 1.0 mM에서, 칼슘 단독 처리시에는 1.8 mM에서, 혼합 처리시 0.1 mM 카페인과 1.8 mM 칼슘 혼합 처리한 경우 높게 나타났고, 고농도의 카페인, 칼슘 혼합 처리 시에는 낮게 나타났다 이러한 실험 결과를 통하여 칼슘이 1.2 mM, 1.8 mM 농도로 존재하는 경우 카페인에 의한 골모세포의 염기성 인산분해효소 활성과 IL-1 ${\beta}$의 활성 억제 효과가 어느 정도 회복되나, 2.5 mM 고농도의 칼슘은 억제된 활성을 회복시키지 못함을 확인하였다.

• The Korean Journal of Pain
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• 제13권1호
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• pp.1-7
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• 2000

Background: Intraarticular local anesthetic injection has been therapeutically applied for pain control in various arthritis patients. However, little physiologic effects of local anesthetics on their tissue were known. This study was conducted to determine its effects on the cell proliferation and matrix metalloproteinases (MMP) production of cultured fibroblast like synoviocytes (FLS) derived from synovial tissues of rheumatoid arthritis patients. Methods: Bupivacaine with varying concentrations 0 (control), 0.1, 0.25, 0.5% was applied to experimental cell groups growing as monolayers in culture plates for varying durations 0 (control), 30, 90, 180 seconds in the presence and absence of interleukin-$1\beta$. Results: No statistical significances were noted in thymidine incorporation between 0, 30, 90 and 180 seconds exposure groups with 0.5% bupivacaine after 1 day and 2 days. Thymidine incorporation between 0, 0.1, 0.25, 0.5% exposure groups 1 day and 2 days after 90 seconds exposure did not show any differences. After exposure to bupivacaine, there were statistically significant increases in MMP-1 (p=0.025) and MMP-3 productions (p=0.000) of FLS in the absence of IL-$1\beta$, but no differences among the groups in the presence of IL-$1\beta$. Conclusion: We concluded that in this short-term in vitro study, bupivacaine does not have injurious effect on cultured rheumatoid arthritic joint tissues. The long-term effect cannot be known from this investigation.

• 대한한방소아과학회지
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• 제26권1호
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• pp.36-45
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• 2012

Objectives Perillae Folium (PF) has been widely used in Korean herbal medicines used for treatment of acute and chronic inflammatory diseases, such as rhinitis, asthma, and enteritis. In this study, to investigate the protective effect of PF on type 1 allergic response, we determined whether PF inhibits early or late allergic responses. Methods The effect of PF was analyzed by ELISA,. RT-PCR and Western blot in RBL-2H3 cells. Levels of ${\beta}$-hexosaminidase, interleukin (IL)-4 and TNF-${\alpha}$ were measured using enzyme-linked immunosorbent assays (ELISAs). mRNA levels of cytokines and enzymes were analyzed with RT-PCR. Signal transduction was analyzed with Western blot. Results We found that PF suppressed ${\beta}$-hexosaminidase release in RBL-2H3 by the IgE-DNP-HSA stimulation. PF also significantly inhibited enzymes level, such as COX-1, COX-2, iNOS, and HDC2, along with reduced cytokine levels, such as IL-2, IL-3, IL-4, IL-6, IL-13, and TNF-${\alpha}$ in RBL-2H3. In addition, PF suppressed the phospholyation of ERK1/2, JNK1/2, and $I{\kappa}B{\alpha}$. Conclusions Our results indicate that PF protects against type 1 allergic response and exert an anti-inflammatory effect through the inhibition of degranulation and expression of cytokines and enzymes via the suppression of signal transduction.

• The Korean Journal of Physiology and Pharmacology
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• 제21권1호
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• pp.117-124
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• 2017

The present study aimed to show that pro-inflammatory cytokines [tumor necrosis factor (TNF)-${\alpha}$, interferon (IFN)-${\gamma}$, and interleukin (IL)-$1{\beta}$] synergistically induce the production of nitric oxide (NO) production in mouse mesangial cells, which play an important role in inflammatory glomerular injury. We also found that co-treatment with cytokines at low doses (TNF-${\alpha}$; 5 ng/ml, IFN-${\gamma}$; 5 ng/ml, and IL-$1{\beta}$; 1.25 U/ml) synergistically induced NO production, whereas treatment with each cytokine alone did not increase NO production at doses up to 100 ng/ml or 50 U/ml. Silymarin, a polyphenolic flavonoid isolated from milk thistle (Silybum marianum), attenuates cytokine mixture (TNF-${\alpha}$, IFN-${\gamma}$, and IL-$1{\beta}$)-induced NO production. Western blot and RT-PCR analyses showed that silymarin inhibits inducible nitric oxide synthase (iNOS) expression in a dose-dependent manner. Silymarin also inhibited extracellular signal-regulated protein kinase-1 and -2 (ERK1/2) phosphorylation. Collectively, we have demonstrated that silymarin inhibits NO production in mouse mesangial cells, and may act as a useful anti-inflammatory agent.

• The Korean Journal of Physiology and Pharmacology
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• 제22권1호
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• pp.1-15
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• 2018

Inflammasomes are intracellular multiprotein complexes that coordinate anti-pathogenic host defense during inflammatory responses in myeloid cells, especially macrophages. Inflammasome activation leads to activation of caspase-1, resulting in the induction of pyroptosis and the secretion of pro-inflammatory cytokines including interleukin $(IL)-1{\beta}$ and IL-18. Although the inflammatory response is an innate host defense mechanism, chronic inflammation is the main cause of rheumatic diseases, such as rheumatoid arthritis (RA), systemic lupus erythematosus (SLE), ankylosing spondylitis (AS), and $Sj{\ddot{o}}gren^{\prime}s$ syndrome (SS). Since rheumatic diseases are inflammatory/autoimmune disorders, it is reasonable to hypothesize that inflammasomes activated during the inflammatory response play a pivotal role in development and progression of these diseases. Indeed, previous studies have provided important observations that inflammasomes are actively involved in the pathogenesis of inflammatory/autoimmune rheumatic diseases. In this review, we summarize the current knowledge on several types of inflammasomes during macrophage-mediated inflammatory responses and discuss recent research regarding the role of inflammasomes in the pathogenesis of inflammatory/autoimmune rheumatic diseases. This avenue of research could provide new insights for the development of promising therapeutics to treat inflammatory/autoimmune rheumatic diseases.

• Biomolecules & Therapeutics
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• 제32권5호
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• pp.611-626
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• 2024

Leptin, an adipose tissue-derived hormone, has exhibited the potent hepatotoxic effects. However, the underlying molecular mechanisms are not fully understood. In this study, we have elucidated the mechanisms by which leptin exerts cytotoxic effects in hepatocytes, particularly focusing on the role of interleukin-1β (IL-1β) signaling. Leptin significantly induced maturation and secretion of IL-1β in cultured rat hepatocytes. Interestingly, inhibition of IL-1β signaling by pretreatment with an IL-1 receptor antagonist (IL-1Ra) or gene silencing of type I IL-1 receptor (IL-1R1) markedly abrogated leptin-induced cell cycle arrest. The critical role of IL-1β signaling in leptin-induced cell cycle arrest is mediated via upregulation of p16, which acts as an inhibitor of cyclin-dependent kinase. In addition, leptin-induced apoptotic cell death was relieved by inhibition of IL-1β signaling, as determined by annexin V/7-AAD binding assay. Mechanistically, IL-1β signaling contributes to apoptotic cell death and cell cycle arrest by suppressing AKT and activation of p38 mitogen-activated protein kinase (p38MAPK) signaling pathways. Involvement of IL-1β signaling in cytotoxic effect of leptin was further confirmed in vivo using hepatocyte specific IL-1R1 knock out (IL-1R1 KO) mice. Essentially similar results were obtained in vivo, where leptin administration caused the upregulation of apoptotic markers, dephosphorylation of AKT, and p38MAPK activation were observed in wild type mice liver without significant effects in the livers of IL-1R1 KO mice. Taken together, these results demonstrate that IL-1β signaling critically contributes to leptin-induced cell cycle arrest and apoptosis, at least in part, by modulating p38MAPK and AKT signaling pathways.

• 대한한방부인과학회지
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• 제26권3호
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• pp.18-32
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• 2013

목 적: 본 연구에서는 부인과의 흔한 질환인 갱년기 우울증의 모델로 반복적인 스트레스를 가한 난소적출 흰쥐를 설정하고 교감단이 쥐의 항우울 행동과 면역기능에 미치는 영향을 살표보고자 하였다. 방 법: 난소적출 흰쥐에 2주간 반복적인 스트레스를 주고, 교감단(100 mg/kg, 400 mg/kg)을 경구 투여한 후 행동검사로 Elevated plus maze, Forced swimming test를 실시하였고, 혈액검사로 혈청 corticosterone, IL-$1{\beta}$와 IL-4의 변화를 측정하였으며, 뇌내의 IL-$1{\beta}$와 IL-4의 변화를 측정하였다. 결 과: 1. Elevated plus maze에서 교감단 100 mg/kg 투여군은 open arms에서의 보낸시간이 대조군에 비해서 차이가 없었으며, 교감단 400 mg/kg 투여군은 open arms에서 보낸 시간이 대조군에 비하여 증가되었으나 유의성은 없었다. 2. Elevated plus maze에서 교감단 100 mg/kg 투여군은 crossing 횟수가 대조군에 비하여 차이가 없었으며, 교감단 400 mg/kg 투여군은 crossing 횟수가 대조군에 비하여 늘어났으나 유의성은 없었다. 3. Forced swimming test에서 교감단 100 mg/kg, 400 mg/kg 투여군은 각각 대조군에 비해서 immobility 시간이 유의성 있게 감소하였다(p<0.01). 4. Corticosterone 측정에서 교감단 400 mg/kg을 투여한 후 Corticosterone 수준이 유의하게 감소하였다(p<0.05). 5. 혈청내 IL-$1{\beta}$와 IL-4 측정에서 교감단 투여군은 대조군에 비해 유의성 있는 감소나 증가가 관찰되지 않았다. 6. 뇌내 IL-$1{\beta}$와 IL-4 측정에서 교감단 투여군은 대조군에 비해 유의성 있는 감소나 증가가 관찰되지 않았다. 결 론: 이상의 결과를 보면 교감단은 난소적출 흰쥐의 우울행동의 완화에 유의성 있는 결과를 나타내었으며, 불안 행동검사에서는 유효한 효과가 없었다. 혈청 corticosterone 측정에서 유의성 있는 감소를 나타내어 항우울효과를 나타내었으나, 면역기능에 작용하는 유의성 있는 결과는 관찰되지 않았다.