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Park, Daehwan,Lee, Jin Yong,Cho, Heui Kyoung,Hong, Woo Jin,Kim, Jisun,Seo, Hyemyung,Choi, Ikjang,Lee, Youngbok,Kim, Juhyeon,Min, Sun-Joon,Yoon, So-Hyun,Hwang, Jae Sung,Cho, Kwang Jin,Kim, Jin Woong American Chemical Society 2018 Biomacromolecules Vol.19 No.7
<P>We herein propose a polymeric nanovehicle system that has the ability to remarkably improve cellular uptake and transdermal delivery. Cell-penetrating peptide-patchy deformable polymeric nanovehicles were fabricated by tailored coassembly of amphiphilic poly(ethylene oxide)-<I>block</I>-poly(ε-caprolactone) (PEO-<I>b</I>-PCL), mannosylerythritol lipid (MEL), and YGRKKRRQRRR-cysteamine (TAT)-linked MEL. Using X-ray diffraction, differential scanning calorimetry, and nuclear magnetic resonance analyses, we revealed that the incorporation of MEL having an asymmetric alkyl chain configuration was responsible for the deformable phase property of the vehicles. We also discovered that the nanovehicles were mutually attracted, exhibiting a gel-like fluid characteristic due to the dipole-dipole interaction between the hydroxyl group of MEL and the methoxy group of PEO-<I>b</I>-PCL. Coassembly of TAT-linked MEL with the deformable nanovehicles significantly enhanced cellular uptake due to macropinocytosis and caveolae-/lipid raft-mediated endocytosis. Furthermore, the <I>in vivo</I> skin penetration test revealed that our TAT-patchy deformable nanovehicles remarkably improved transdermal delivery efficiency.</P> [FIG OMISSION]</BR>
Low-Temperature Sintering Behavior of Aluminum Nitride Ceramics with Added Copper Oxide or Copper
Hwang, Jin-Geun,Oh, Kyung-Sik,Chung, Tai-Joo,Kim, Tae-Heui,Paek, Yeong-Kyeun The Korean Ceramic Society 2019 한국세라믹학회지 Vol.56 No.1
The low-temperature sintering behavior of AlN was investigated through a conventional method. $CaF_2$, CuO and Cu were selected as additives based on their low melting points. When sintered at $1600^{\circ}C$ for 8 h in $N_2$ atmosphere, a sample density > 98% was obtained. The X-ray data indicated that eutectic reactions below $1200^{\circ}C$ were found. Therefore, the current systems have lower liquid formation temperatures than other systems. The liquid phase showed high dihedral angles at triple grain junctions, indicating that the liquid had poor wettability on the grain surfaces. Eventually, the liquid was likely to vaporize due to the unfavorable wetting condition. As a result, a microstructure with clean grain boundaries was obtained, resulting in higher contiguity between grains. From EDS analysis, oxygen impurity seems to be well removed in AlN lattice. Therefore, it is believed that the current systems are beneficial for reducing sintering temperature and improving oxygen removal.
Spermidine Protects against Oxidative Stress in Inflammation Models Using Macrophages and Zebrafish
( Jin-woo Jeong ),( Hee-jae Cha ),( Min Ho Han ),( Su Jung Hwang ),( Dae-sung Lee ),( Jong Su Yoo ),( Il-whan Choi ),( Suhkmann Kim ),( Heui-soo Kim ),( Gi-young Kim ),( Su Hyun Hong ),( Cheol Park ) 한국응용약물학회 2018 Biomolecules & Therapeutics(구 응용약물학회지) Vol.26 No.2
Spermidine is a naturally occurring polyamine compound that has recently emerged with anti-aging properties and suppresses inflammation and oxidation. However, its mechanisms of action on anti-inflammatory and antioxidant effects have not been fully elucidated. In this study, the potential of spermidine for reducing pro-inflammatory and oxidative effects in lipopolysaccharide (LPS)-stimulated macrophages and zebrafish was explored. Our data indicate that spermidine significantly inhibited the production of pro-inflammatory mediators such as nitric oxide (NO) and prostaglandin E<sub>2</sub> (PGE<sub>2</sub>), and cytokines including tumor necrosis factor-α and interleukin-1β in RAW 264.7 macrophages without any significant cytotoxicity. The protective effects of spermidine accompanied by a marked suppression in their regulatory gene expression at the transcription levels. Spermidine also attenuated the nuclear translocation of NF-κB p65 subunit and reduced LPS-induced intracellular accumulation of reactive oxygen species (ROS) in RAW 264.7 macrophages. Moreover, spermidine prevented the LPS-induced NO production and ROS accumulation in zebrafish larvae and was found to be associated with a diminished recruitment of neutrophils and macrophages. Although more work is needed to fully understand the critical role of spermidine on the inhibition of inflammation-associated migration of immune cells, our findings clearly demonstrate that spermidine may be a potential therapeutic intervention for the treatment of inflammatory and oxidative disorders.
Hwang, Hyeon-Shik,Yuan, Donghui,Jeong, Kweon-Heui,Uhm, Gi-Soo,Cho, Jin-Hyoung,Yoon, Sook-Ja The Korean Association Of Orthodontists 2012 대한치과교정학회지 Vol.42 No.2
Objective: To identify the right and left difference of the facial soft tissue landmarks three-dimensionally from the subjects of normal occlusion individuals. Materials and Methods: Cone-beam computed tomography (CT) scans were obtained in 48 normal occlusion adults (24 men, 24 women), and reconstructed into 3-dimensional (3D) models by using a 3D image soft ware. 3D position of 27 soft tissue landmarks, 9 midline and 9 pairs of bilateral landmarks, were identified in 3D coordination system, and their right and left differences were calculated and analyzed. Results: The right and left difference values derived from the study ranged from 0.6 to 4.6 mm indicating a high variability according to the landmarks. In general, the values showed a tendency to increase according to the lower and lateral positioning of the landmarks in the face. Overall differences were determined not only by transverse differences but also by sagittal and vertical differences, indicating that 3D evaluation would be essential in the facial soft tissue analysis. Conclusions: Means and standard deviations of the right and left difference of facial soft tissue landmarks derived from this study can be used as the diagnostic standard values for the evaluation of facial asymmetry.
( Jin Tae Hong ),( Pushpa Saranya Kollipara ),( Do Hee Won ),( Chul Ju Hwang ),( Yu Yeon Jung ),( Heui Seoung Yoon ),( Mi Hee Park ),( Min Jong Song ),( Ho Sueb Song ) 한국응용약물학회 2014 Biomolecules & Therapeutics(구 응용약물학회지) Vol.22 No.2
In the present study, we investigated anti-cancer effect of snake venom activated NK cells (NK-92MI) in lung cancer cell lines. Weused snake venom (4 mg/ml) treated NK-92MI cells to co-culture with lung cancer cells. There was a further decrease in cancer cellgrowth up to 65% and 70% in A549 and NCI-H460 cell lines respectively, whereas 30-40% was decreased in cancer cell growthby snake venom or NK-92MI alone treatment. We further found that the expression of various apoptotic proteins such as that Bax,and cleaved caspase-3 as well as the expression of various death receptor proteins like DR3, DR4 and Fas was also further increased. Moreover, consistent with cancer cell growth inhibition, the DNA binding activity of NF-kB was also further inhibited aftertreatment of snake venom activated NK-92MI cells. Thus, the present data showed that activated NK cells could further inhibitlung cancer cell growth.
황인경,조영,이진희 한국조리과학회 1998 한국식품조리과학회지 Vol.14 No.1
부재료를 달리하여 제조한 김치의 발효속도특성 및 미생물학적 발효양상을 조사하였다. 발효 진행에 따라 김치 시료들의 pH는 감소하고 총산도는 증가하였고, 산화환원전위는 감소되다가 다시 증가하는 현상을 보였고 발효 최적기에 가장 낮은 값을 나타내었다. 또한 전 발효 기간 동안 생강, 고추가루 및 혼합시료에서 총생균수와 젖산균수가 많았으며, Leu. mensenteroides의 수는 생강과 고추가루 시료에 많았다. 김치의 적숙기에 젖산균 및 Leu. mensenteroides의 수가 최대이었고 Leu. mensenteroides가 감소하는 시기에 Lac. plantarum이 생기기 시작하였다. 이러한 발효속도 및 미생물 특성의 경시적 변화가 마늘 시료에서는 느리게 적생고추 시료에서는 빠르게 진행되었다. 따라서, 마늘은 젖산균 발효를 비교적 낮은 수준으로 오래 지속되게 하여 김치의 가식일수를 늘이는 저장성 향상에 필요한 부재료이고, 생강과 고추가루는 젖산균과 그 중 Leu. mensenteroides의 생육을 촉진하여 김치 맛을 좋게하는데 도움이 되는 부재료라고 생각된다. 그리고, 산화환원전위가 김치의 발효 최적기를 찾는데 유용한 지표가 됨을 알 수 있었다. The characteristics of Kimchi, associated with proceeding velocity of fermentation, and microbial changes, were investigated during fermentation where kimchi were prepared by the addition of different kinds of minor ingredients. In all samples, total acidity increased, and the pH and total reducing sugar content decreased as the fermentation proceeded. Redox potentials decreased from early to middle fermentation period but thereafter increased and had the lowest value at optimum ripening stage. The counts of total viable and lactic acid bacteria increased rapidly at the begining and decreased slowly. These bacterial counts of kimchi samples containing ginger, red pepper powder, and mixture of all minor ingredients were higher than those of other samples. The number of Leuconostoc mensenteroides reached the maximum at the optimum fermenting stage, Lactobacillus plantarum appeared at the time when Leu. mesenteroides reduced. All these phenomena were observed earlier in the samples containing raw red pepper and later in the samples added garlic than in other samples. It is suggested that garlic is the ingredient which improved storage capacity by prolonging fermentation period by lactic acid bacteria beneficial to less acidification, and ginger and red pepper powder are materials which gave better taste to kimchi by stimulating the growth of Leu. mesenteroids. And redox potential was an useful indicator in choosing optimum ripening time during fermentation.
Hwang, Yun-Ho,Kang, Kyung-Yun,Kim, Jong-Jin,Lee, Sung-Ju,Son, Young-Jin,Paik, Soo-Heui,Yee, Sung-Tae Hindawi Publishing Corporation 2016 Evidence-based Complementary and Alternative Medic Vol.2016 No.-
<P><I>Polygonum multiflorum </I>(PM), a traditional Chinese medicine, is used to treat various diseases including nonalcoholic fatty liver disease and hyperlipidemia. However, the influence of PM on osteoporosis in animals is unclear. The present study investigated the antiosteoporotic effect of PM on bone mass in ovariectomized (OVX) mice and its possible mechanism of action. Twenty-five female C3H/HeN mice were divided into five groups of five mice as follows. Sham-operated control mice received daily oral gavage of an equal volume of water, and OVX mice received daily oral gavage of water or an injection of <I>β</I>-estradiol or PM for 6 weeks. Administration of PM significantly suppressed body weight and organs weight and increased weight and length of bone compared with the OVX group. Treatment with PM reversed osteopenia in OVX mice, thereby improving the bone morphometric parameters. Moreover, histological analysis using hematoxylin and eosin staining showed that PM inhibited OVX-induced bone loss. Serum estradiol and bone alkaline phosphatase levels were significantly decreased in the OVX group, with the levels increasing with PM treatment. In addition, tartrate-resistant acid phosphatase activity was inhibited by PM in OVX mice. These results suggest that PM is effective in preventing bone loss in OVX mice. </P>
Spermidine Protects against Oxidative Stress in Inflammation Models Using Macrophages and Zebrafish
Jeong, Jin-Woo,Cha, Hee-Jae,Han, Min Ho,Hwang, Su Jung,Lee, Dae-Sung,Yoo, Jong Su,Choi, Il-Whan,Kim, Suhkmann,Kim, Heui-Soo,Kim, Gi-Young,Hong, Su Hyun,Park, Cheol,Lee, Hyo-Jong,Choi, Yung Hyun The Korean Society of Applied Pharmacology 2018 Biomolecules & Therapeutics(구 응용약물학회지) Vol.26 No.2
Spermidine is a naturally occurring polyamine compound that has recently emerged with anti-aging properties and suppresses inflammation and oxidation. However, its mechanisms of action on anti-inflammatory and antioxidant effects have not been fully elucidated. In this study, the potential of spermidine for reducing pro-inflammatory and oxidative effects in lipopolysaccharide (LPS)-stimulated macrophages and zebrafish was explored. Our data indicate that spermidine significantly inhibited the production of pro-inflammatory mediators such as nitric oxide (NO) and prostaglandin $E_2$ ($PGE_2$), and cytokines including tumor necrosis $factor-{\alpha}$ and $interleukin-1{\beta}$ in RAW 264.7 macrophages without any significant cytotoxicity. The protective effects of spermidine accompanied by a marked suppression in their regulatory gene expression at the transcription levels. Spermidine also attenuated the nuclear translocation of $NF-{\kappa}B$ p65 subunit and reduced LPS-induced intracellular accumulation of reactive oxygen species (ROS) in RAW 264.7 macrophages. Moreover, spermidine prevented the LPS-induced NO production and ROS accumulation in zebrafish larvae and was found to be associated with a diminished recruitment of neutrophils and macrophages. Although more work is needed to fully understand the critical role of spermidine on the inhibition of inflammation-associated migration of immune cells, our findings clearly demonstrate that spermidine may be a potential therapeutic intervention for the treatment of inflammatory and oxidative disorders.