http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Van Anh Vo,Jae-Won Lee,Ji-Young Kim,Jun-Ho Park,Hee Jae Lee,Sung-Soo Kim,Yong-Soo Kwon,Wanjoo Chun 대한생리학회-대한약리학회 2014 The Korean Journal of Physiology & Pharmacology Vol.18 No.1
Hydroxycinnamic acids have been reported to possess numerous pharmacological activities such as antioxidant, anti-inflammatory, and anti-tumor properties. However, the biological activity of 1-p- coumaroyl β-D-glucoside (CG), a glucose ester derivative of p-coumaric acid, has not been clearly examined. The objective of this study is to elucidate the anti-inflammatory action of CG in lipopo-lysaccharide (LPS)-stimulated RAW264.7 macrophage cells. In the present study, CG significantly suppressed LPS-induced excessive production of pro-inflammatory mediators such as nitric oxide (NO) and PGE2 and the protein expression of iNOS and COX-2. CG also inhibited LPS-induced secretion of pro-inflammatory cytokines, IL-1β and TNF-α. In addition, CG significantly suppressed LPS-induced degradation of IκB. To elucidate the underlying mechanism by which CG exerts its anti-inflammatory action, involvement of various signaling pathways were examined. CG exhibited significantly increased Akt phosphorylation in a concentration-dependent manner, although MAPKs such as Erk, JNK, and p38 appeared not to be involved. Furthermore, inhibition of Akt/PI3K signaling pathway with wort-mannin significantly, albeit not completely, abolished CG-induced Akt phosphorylation and anti- inflammatory actions. Taken together, the present study demonstrates that Akt signaling pathway might play a major role in CG-mediated anti-inflammatory activity in LPS-stimulated RAW264.7 macrophage cells.
( Van Anh Vo ),( Jae Won Lee ),( Ji Eun Chang ),( Ji Young Kim ),( Nam Ho Kim ),( Hee Jae Lee ),( Sung Soo Kim ),( Wan Joo Chun ),( Yong Soo Kwon ) 한국응용약물학회 2012 Biomolecules & Therapeutics(구 응용약물학회지) Vol.20 No.6
Avicularin, quercetin-3-a-L-arabinofuranoside, has been reported to possess diverse pharmacological properties such as anti-in-flammatory and anti-infectious effects. However, the underlying mechanism by which avicularin exerts its anti-inflammatory activity has not been clearly demonstrated. This study aimed to elucidate the anti-inflammatory mechanism of avicularin in lipopolysac-charide (LPS)-stimulated RAW 264.7 macrophage cells. Avicularin significantly inhibited LPS-induced excessive production of pro-inflammatory mediators such as nitric oxide (NO) and PGE2 and the protein levels of iNOS and COX-2, which are responsible for the production of NO and PGE2, respectively. Avicularin also suppressed LPS-induced overproduction of pro-inflammatory cytokine IL-1b. Furthermore, avicularin significantly suppressed LPS-induced degradation of IκB, which retains NF-κB in the cytoplasm, consequently inhibiting the transcription of pro-inflammatory genes by NF-κB in the nucleus. To understand the un-derlying signaling mechanism of anti-inflammatory activity of avicularin, involvement of multiple kinases was examined. Avicularin significantly attenuated LPS-induced activation of ERK signaling pathway in a concentration-dependent manner. Taken together, the present study clearly demonstrates that avicularin exhibits anti-inflammatory activity through the suppression of ERK signaling pathway in LPS-stimulated RAW 264.7 macrophage cells.
( Van Anh Vo ),( Jae Won Lee ),( Seung Yeon Shin ),( Jae Hyun Kwon ),( Hee Jae Lee ),( Sung Soo Kim ),( Yong Soo Kwon ),( Wan Joo Chun ) 한국응용약물학회 2014 Biomolecules & Therapeutics(구 응용약물학회지) Vol.22 No.1
Derivatives of caffeic acid have been reported to possess diverse pharmacological properties such as anti-inflammatory, anti-tumor, and neuroprotective effects. However, the biological activity of methyl p-hydroxycinnamate, an ester derivative of caffeic acid, has not been clearly demonstrated. This study aimed to elucidate the anti-inflammatory mechanism of methyl p-hydroxycinnamate in lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophage cells. Methyl p-hydroxycinnamate significantly inhibited LPSinduced excessive production of pro-inflammatory mediators such as nitric oxide (NO) and PGE2 and the protein expression of iNOS and COX-2. Methyl p-hydroxycinnamate also suppressed LPS-induced overproduction of pro-inflammatory cytokines such as IL-1b and TNF-a. In addition, methyl p-hydroxycinnamate significantly suppressed LPS-induced degradation of IκB, which retains NF-κB in the cytoplasm, consequently inhibiting the transcription of pro-inflammatory genes by NF-κB in the nucleus. Methyl p-hydroxycinnamate exhibited significantly increased Akt phosphorylation in a concentration-dependent manner. Furthermore, inhibition of Akt signaling pathway with wortmaninn abolished methyl p-hydroxycinnamate-induced Akt phosphorylation. Taken together, the present study clearly demonstrates that methyl p-hydroxycinnamate exhibits anti-inflammatory activity through the activation of Akt signaling pathway in LPS-stimulated RAW264.7 macrophage cells.
Vo, Van Anh,Lee, Jae-Won,Kim, Ji-Young,Park, Jun-Ho,Lee, Hee Jae,Kim, Sung-Soo,Kwon, Yong-Soo,Chun, Wanjoo The Korean Society of Pharmacology 2014 The Korean Journal of Physiology & Pharmacology Vol.18 No.1
Hydroxycinnamic acids have been reported to possess numerous pharmacological activities such as antioxidant, anti-inflammatory, and anti-tumor properties. However, the biological activity of 1-p-coumaroyl ${\beta}$-D-glucoside (CG), a glucose ester derivative of p-coumaric acid, has not been clearly examined. The objective of this study is to elucidate the anti-inflammatory action of CG in lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophage cells. In the present study, CG significantly suppressed LPS-induced excessive production of pro-inflammatory mediators such as nitric oxide (NO) and $PGE_2$ and the protein expression of iNOS and COX-2. CG also inhibited LPS-induced secretion of pro-inflammatory cytokines, IL-$1{\beta}$ and TNF-${\alpha}$. In addition, CG significantly suppressed LPS-induced degradation of $I{\kappa}B$. To elucidate the underlying mechanism by which CG exerts its anti-inflammatory action, involvement of various signaling pathways were examined. CG exhibited significantly increased Akt phosphorylation in a concentration-dependent manner, although MAPKs such as Erk, JNK, and p38 appeared not to be involved. Furthermore, inhibition of Akt/PI3K signaling pathway with wortmannin significantly, albeit not completely, abolished CG-induced Akt phosphorylation and anti-inflammatory actions. Taken together, the present study demonstrates that Akt signaling pathway might play a major role in CG-mediated anti-inflammatory activity in LPS-stimulated RAW264.7 macrophage cells.
( Van Anh Vo ),( Jae Won Lee ),( Jun Ho Park ),( Jae Hyun Kwon ),( Hee Jae Lee ),( Sung Soo Kim ),( Yong Soo Kwon ),( Wan Joo Chun ) 한국응용약물학회 2014 Biomolecules & Therapeutics(구 응용약물학회지) Vol.22 No.3
N-(p-Coumaryol) tryptamine (CT), a phenolic amide, has been reported to exhibit anti-oxidant and anti-inflammatory activities. However, the underlying mechanism by which CT exerts its pharmacological properties has not been clearly demonstrated. The objective of this study is to elucidate the anti-inflammatory mechanism of CT in lipopolysaccharide (LPS)-challenged RAW264.7 macrophage cells. CT significantly inhibited LPS-induced extracellular secretion of pro-inflammatory mediators such as nitric oxide (NO) and PGE2, and protein expressions of iNOS and COX-2. In addition, CT significantly suppressed LPS-induced secretion of pro-inflammatory cytokines such as TNF-a and IL-1b. To elucidate the underlying anti-inflammatory mechanism of CT, involvement of MAPK and Akt signaling pathways was examined. CT significantly attenuated LPS-induced activation of JNK/c-Jun, but not ERK and p38, in a concentration-dependent manner. Interestingly, CT appeared to suppress LPS-induced Akt phosphorylation. However, JNK inhibition, but not Akt inhibition, resulted in the suppression of LPS-induced responses, suggesting that JNK/c- Jun signaling pathway significantly contributes to LPS-induced inflammatory responses and that LPS-induced Akt phosphorylation might be a compensatory response to a stress condition. Taken together, the present study clearly demonstrates CT exerts antiinflammatory activity through the suppression of JNK/c-Jun signaling pathway in LPS-challenged RAW264.7 macrophage cells.
A New Tracking Control Method of Maglev Systems
Anh Tuan Vo,Hee-Jun Kang,Thanh Nguyen Truong,Van Cuong Nguyen 제어로봇시스템학회 2021 제어로봇시스템학회 국내학술대회 논문집 Vol.2021 No.6
In this paper, a new tracking control of maglev systems (MLSs) is introduced. The control proposal is developed based on fixed-time control theory and non-singular fast terminal sliding mode control (NFTSMC). Consequently, the proposed control algorithm provides better trajectory tracking performance than the conventional NFTSMC, including stronger against dynamical uncertainties and exterior disturbances, faster convergence in fixed-time, and smaller control errors. The Lyapunov Principle has been used to confirm full qualifications of stability and convergence in fixed-time. The effectiveness of the control proposal also is verified through the experiments performed for trajectory tracking control of a maglev system (MLS).
Chitosan Oligomer as a Hopeful Adjuvant for H5n1 Influenza Vaccine
( Le Van Hiep ),( Mai Thi Thanh ),( Dang Thi Hong Van ),( Vo Thi Phuong Khanh ),( Nguyen Anh Dzung ) 한국키틴키토산학회 2008 한국키틴키토산학회지 Vol.13 No.1
Effect of Chitosan oligomer (dp = 8-16) and other adjuvant such as: Aluminum phosphate (AlPO4) and Freund on immune response of H5N1 influenza vaccine in Swiss mice has been investigated. The Swiss mice were twice vaccinated alternative 20 days with dose 0.1 ml/mouse. After 10, 20 and 30 days, the immune response of Swiss mice with H5N1 vaccine was detected. The result showed that after 20 days of the first vaccination, immune response of chitosan oligomer test and Freund was 100%, but Freund test reduced 80% after 30days of vaccination. Meanwhile, immune response of the control and AlPO4 test was very low, only 40%. The Effect of chitosan oligomer and the others on antibody titer has been also investigated. The result showed that the antibody titer of chitosan oligomer test was 60 HIU (Hemagglutination units), 70 HIUs after 10 and 20 days of the first vaccination, and increased up to 112 HIUs after 10 days of the second vaccination and the antibody titer of the chitosan oligomer test was higher than the others. Therefore, chitosan oligomer is a hopeful adjuvant for H5N1 influenza vaccine.