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Lee, Syng-Ook,Chintharlapalli, Sudhakar,Liu, Shengxi,Papineni, Sabitha,Cho, Sung Dae,Yoon, Kyungsil,Safe, Stephen American Association for Cancer Research 2009 Molecular cancer research Vol.7 No.7
<P>1,1-Bis(3'-indolyl)-1-(p-anisyl)methane (DIM-C-pPhOCH3) activates the orphan receptor nerve growth factor-induced Balpha (Nur77) in cancer cells, and in this study, DIM-C-pPhOCH3 decreased Panc1 pancreatic cancer cell survival and arrested cells in G0-G1. These responses were accompanied by induction of the cyclin-dependent kinase inhibitor p21 in pancreatic cancer cells. Mechanistic studies showed that induction of p21 mRNA and protein by DIM-C-pPhOCH3 was Nur77 dependent but did not depend on Krüppel-like factor 4, which was also induced by DIM-C-pPhOCH3. Activation of p21 promoter constructs by DIM-C-pPhOCH3 required the GC-rich proximal region of the promoter, and results of RNA interference studies showed that Nur77-dependent activation of the p21 promoter involved interactions with Sp1 and Sp4 but not Sp3. Interactions of Nur77 with the p21 promoter in Panc1 cells treated with DIM-C-pPhOCH3 were also confirmed in chromatin immunoprecipitation assays. These data show that activation of nuclear Nur77 results in a novel pathway for induction of p21, which is independent of Nur77 response elements but dependent on Sp proteins bound to the GC-rich proximal region of the p21 promoter.</P>
Lee, Ji-Won,Ji, Young-Ju,Lee, Syng-Ook,Lee, In-Seon The Microbiological Society of Korea 2007 The journal of microbiology Vol.45 No.4
This study was conducted in an effort to evaluate the antimicrobial activity and antibiotic-resistant gene regulation from Saliva miltiorrhiza Bunge on methicillin-resistant Staphylococcus aureus (MRSA). A variety of solvent fractions and methanol extracts of S. miltiorrhiza Bunge were tested in order to determine its antimicrobial activities against S. aureus and MRSA. As a result, the hexane fraction of S. miltiorrhiza Bunge evidenced the highest levels of antimicrobial activity against S. aureus and MRSA. The MICs of the hexane fraction against various MRSA specimens were $64<MICs{\leq}128{\mu}g/ml$. The hexane fraction evidenced inhibitory effects superior to those of the chloroform fraction. The results showed inhibition zones of hexane (16 mm) and chloroform (14 mm) fractions against MRSA KCCM 40511 at $1,000{\mu}g/disc$. The hexane and chloroform fractions inhibited the expression of the resistant genes, mecA, mecR1, and femA in mRNA. Moreover, the results of Western blotting assays indicated that the hexane and chloroform fractions inhibited the expression of the resistant protein, PBP2a. These results reveal that the hexane and chloroform fractions of S. miltiorrhiza Bunge may prove to be a valuable choice for studies targeted toward the development of new antimicrobial agents.
이승욱(Syng-Ook Lee),유미희(Mi-Hee Yu),최준혁(Jun-Hyeok Choi),임효권(Hyo-Gwon Im),이인선(In-Seon Lee) 한국식품영양과학회 2013 한국식품영양과학회지 Vol.42 No.6
육류조리용 간장양념 제조 시 건강기능성 부가의 목적으로 액상칼슘과 올리고당을 첨가하여 양념을 제조한 후 품질특성을 비교 분석하였다. 4℃에서 저장한 양념들의 경우 pH와 적정산도는 9일간의 저장기간 동안 별다른 변화를 보이지 않았으나 20℃에서 저장한 양념의 pH는 대조구와 2%첨가구가 6일째부터 큰 감소를 보인 반면, 4%와 8% 첨가구는 6일째까지 큰 변화를 보이지 않다가 9일째 약간의 감소를 보여 대조구와 2% 첨가구에 비해 유의적인 차이를 나타냈다. 그리고 적정산도 역시 pH의 경우와 유사하게 4%와 8% 첨가구들이 대조구에 비해 낮은 증가를 보여 유의적인 차이를 나타냈다. 미생물 검사 결과, 4℃에서 저장한 양념들은 경우 저장기간 동안 별다른 변화를 보이지 않았다. 그러나 총균수의 경우 20℃에서 저장한 양념은 3일 이후 급격히 증가하였으며, 4%와 8% 첨가구가 저장 3일과 6일째에 무첨가구보다 유의적으로 낮은 생균수를 나타냈다. 젖산균도 3일 이후 급격히 증가하여 대조구는 6일째에 최고치를 나머지는 9일째 최고치를 보였다. 젖산균수에서도 역시 4%와 8% 첨가구가 저장 3일과 6일째에 무첨가구보다 유의적으로 낮은수를 나타냈다. 효모는 젖산균과 같은 경향으로 3일 이후 급격히 증가하여 대조구는 6일째에 최고치를 나머지는 9일째 최고치를 보였으며, 4%와 8% 첨가구가 유의적으로 낮은 효모수를 나타냈다. 양념의 색도는 저장기간이 증가할수록 모든 양념이 전체 항목에서 소폭 증가하는 경향이었으나, 저장온도와 시간 그리고 액상칼슘의 첨가에 따른 양념의 색도변화는 그 변화폭이 유의적인 차이가 없는 것으로 나타났다. 양념들은 액상칼슘의 첨가량에 따라 칼슘함량이 일정하게 증가하였으나, 그 양념을 이용해서 제조한 양념육을 조리한 후 칼슘함량을 각각 측정한 결과는 2%, 4%, 8% 첨가구가 각각 33.47 mg/100 g, 54.72 mg/100 g, 58.23 mg/100 g의 칼슘함량을 보여 칼슘의 첨가량에 따라 비례적으로 증가되지 않는 것으로 나타났다. 관능검사 결과는 외관을 제외한 모든 항목에서 실험구별로 약간의 차이는 보였지만 모든 구간에서 통계적인 유의차는 나타나지 않았다. 따라서 액상칼슘이 첨가된 양념은 관능적 품질에 영향을 미치지 않으면서 저장성이 우수할 뿐만 아니라 현대인의 식생활에서 가장 부족하기 쉬운 칼슘의 섭취 및 흡수의 증대를 가져와 특히 칼슘 섭취가 많이 필요한 성인이나 성장기 어린이에게 풍부한 영양학적 효과를 기대할 수 있을 것으로 생각된다. In this study, liquid calcium was used to develop a calcium-fortified soy sauce-based seasoning for meat and the quality characteristics of the seasoning and cooked meat were investigated. All seasonings with different amount of liquid calcium (0, 2, 4, or 8%) showed no significant changes in pH and titratable acidity at 4℃ for 9 days; however, the control seasoning and seasoning with 2% liquid calcium (Ca-2%) showed significant decreases in pH and increases in titratable acidity during storage at 20℃ for 9 days, compared to the seasoning with 4% (Ca-4%) and 8% (Ca-8%) liquid calcium. We also observed that during storage at 20oC, the numbers of total aerobic bacteria, lactic acid bacteria, and yeast were significantly lower in Ca-4% and Ca-8% seasoning compared to the control or Ca-2%. The calcium contents in cooked meat seasoned with the control, Ca-2%, Ca-4%, or Ca-8% were 2.16, 33.47, 54.72, and 58.23 mg/100 g, respectively. Sensory evaluations demonstrated no significant differences in flavor, taste, juiciness, texture, and overall acceptability between the cooked meat samples. These results suggest that soy sauce seasoning supplemented with liquid calcium (2~8%) effectively increases the calcium content in cooked meat without adversely affecting its taste, flavor, and juiciness. Thus, this type of calcium-fortified seasoning may be helpful in combating the lack of calcium in modern diets.
Fucoidan induces caspase-dependent apoptosis in MC3 human mucoepidermoid carcinoma cells
LEE, HANG-EUN,CHOI, EUN-SUN,SHIN, JI-AE,LEE, SYNG-OOK,PARK, KI-SOO,CHO, NAM-PYO,CHO, SUNG-DAE D.A. Spandidos 2014 Experimental and therapeutic medicine Vol.7 No.1
<P>Fucoidan is a sulfated polysaccharide present in brown algae that has been identified to exhibit multiple biological effects. In this study, the apoptotic effects of fucoidan in MC3 human mucoepidermoid carcinoma (MEC) cells were investigated. The apoptotic effects of fucoidan on MC3 MEC cells were evaluated by cell proliferation assay, 4′,6-diamidino-2-phenylindole staining and western blot analysis. The results showed that fucoidan decreased cell proliferation and induced caspase-dependent apoptosis in MC3 MEC cells. Fucoidan downregulated the phosphorylation of extracellular signal-regulated kinase (ERK) 1/2, whereas phospho-p38 mitogen-activated protein kinase or phospho-c-Jun NH<SUB>2</SUB>-terminal kinase (JNK) levels were not altered. In addition, fucoidan significantly decreased the expression levels of myeloid cell leukemia-1 (Mcl-1). These results suggest that fucoidan is able to modulate the ERK1/2 pathway and thereby regulate Mcl-1 protein expression and induce apoptosis in MC3 MEC cells. Therefore, fucoidan may be a promising agent for the treatment of human MEC.</P>