Effects of aerosol on evaporation, freezing and precipitation in a multiple cloud system

Lee, Seoung Soo,Kim, Byung-Gon,Yum, Seong Soo,Seo, Kyong-Hwan,Jung, Chang-Hoon,Um, Jun Shik,Li, Zhanqing,Hong, JinKyu,Chang, Ki-Ho,Jeong, Jin-Yim Springer-Verlag 2017 Climate dynamics Vol.48 No.3

<P>Aerosol effects on clouds and precipitation account for a large portion of uncertainties in the prediction of the future course of global hydrologic circulations and climate. As a process of a better understanding of interactions between aerosol, clouds and precipitation, simulations are performed for a mixed-phase convective multiple-cloud system over the tropics. Studies on single-cloud systems have shown that aerosol-induced increases in freezing, associated increases in parcel buoyancy and thus the intensity of clouds (or updrafts) are a main mechanism which controls aerosol-cloud-precipitation interactions in convective clouds. However, in the multiple-cloud system that plays much more important roles in global hydrologic circulations and thus climate than single-cloud systems, aerosol effects on condensation play the most important role in aerosol-induced changes in the intensity of clouds and the effects on freezing play a negligible role in those changes. Aerosol-induced enhancement in evaporation intensifies gust fronts and increases the number of subsequently developing clouds, which leads to the substantial increases in condensation and associated intensity of convection. Although aerosol-induced enhancement in freezing takes part in the increases in condensation by inducing stronger convergence around cloud bottom, the increases in condensation are similar to one order of magnitude larger than those in freezing. It is found that while aerosol-induced increases in freezing create intermittent extremely heavy precipitation, aerosol-induced increases in evaporation enhance light and medium precipitation in the multiple-cloud system here. This increase in light and medium precipitation makes it possible that cumulative precipitation increases with increasing aerosol concentration, although the increase is small. It is interesting that the altitude of the maximum of the time- and domain-averaged hydrometeor mass densities is quite robust to increases in aerosol concentration. This is because locations of gust fronts and homogeneous freezing do not vary significantly with changing aerosol concentration and this outweighs aerosol effects on hydrometeor size.</P>

Caco-2 세포 단층막 투과 실험시 교반이 약물의 투과계수에 미치는 영향

홍순선,유호정,이홍,정석재,김대덕,심창구 한국약제학회 2005 Journal of Pharmaceutical Investigation Vol.35 No.2

The unstirred water layer (UWL), which has been known to exist in the boundary of the intestinal lumen and intestinal wall, often behaves as an absorption barrier especially for lipophilic drugs. The intestinal absorption of drugs is often characterized using Caco-2 cell monolayers grown on Transwell polycarbonate membranes. The permeability (Pare) of drugs across the cell monolayer might be influenced by the agitation of the donor compartment, since the width of UWL on the surface of the cell monolayer would be reduced by the agitation. In this study, the effect of agitation of the donor compartment with 60 rpm on the permeability was measured for 12 drugs with a wide range of lipophilicity and permeability. The of mannitol, tributylmethyl ammonium, cimetidine, ranitidine, hydrocortisone, benzylpenicillin and loxoprofen was not influenced by the agitation, while the P_(app) of theophylline, propranolol, YH439, phenylpropanolarnine and testosterone was increased by the agitation. There was a significant correlation between the increase of P_(app) by agitation and the lipophilicity for the compounds having P_(app) > 2 x 10^(-5) cm/sec. No correlation was observed for the difference in P_(app) by agitation and the molecular weight, or lipophilicity of the drugs. Therefore, the agitation rate of the donor compartment in the Caco-2 cell monolayer study should be carefully controlled in order to estimate Pap, reproducibly especially for iipophilic drugs.

대전·충남지역 보건소 간호사의 보건사업 수행에 관한 조사연구

홍춘실,김현리,신창례,한창옥 충남대학교 의과대학 지역사회의학연구소 1994 충남의대잡지 Vol.21 No.1

This study was purposed to find out the health service performance of public health nurses in Taejon and Chungnam area. The study subjects was public health nurses,119 and data collection was performed from 3.Sep.1990 to 30.Nov. 1990. The research scale was made by Community Health Nursing Academic Affairs and revealed to health service dimension in health center. The result were as follows : 1. General characteristics of subjects. We can notice the most largest distributions in each characteristics: 1) Marrital status : the married(72.3) 2) Religion : the protestant(33.6) 3) The career in hospital : 1-4years group(37.8) 4) The possession of licence and qualification : double licenses or qualification possession. Only 2% of subjects had bachelor degree. The distribution of working part was that : family planning(31.1%),infant and child(29.4%), clinic(15.1%), TB management(9.2%), others(9.2%), immunization (4.2%) injection part(1.7%). 2. Work performance according to the dimension of health project was that : planning(2.771),other official affairs(2.501), infant and child care(2.442), others special project(2.424), prenatal care(2.303), postpartum care (2.296), family planning(2.267), disease control(1.933), delivery care(1.904), TB management(1.827), practice education(1.748), other health projects( 1.677), and there was a high performance score in guide and education items and record and report items relatively. . 3.Work performance according to general characteristics There was a statistically significant differences in work performance score of planning dimension according to age, marrital status, working place and working part, and in work performance score of disease control dimension according to religion, and in work performance score of other dimension according to marrital status,and in work performance score of planning,infant & child care, family planning, practice education, other official affairs and other health projects according to working places. There was a statistically significant differences in work performance score of planning, prenatal care, postpartum care, infant & child care, family planning, disease control and others dimension according to working part.

The Effect of Evening Primrose Oil for the Prevention of Xerotic Cheilitis in Acne Patients Being Treated with Isotretinoin: A Pilot Study

( Kui Young Park ),( Eun Jung Ko ),( In Su Kim ),( Kap Sok Li ),( Beom Joon Kim ),( Seong Jun Seo ),( Myeung Nam Kim ),( Chang Kwun Hong ) 대한피부과학회 2014 Annals of Dermatology Vol.26 No.6

Background: The most common adverse effects of oral isotretinoin are cheilitis, skin dryness, dry eyes, and conjunctivitis, whereas evening primrose oil (EPO) is known to improve skin moisture and transepidermal water loss (TEWL) in healthy adults and atopic patients. Objective: To evaluate the clinical efficacy and safety of EPO in preventing xerotic cheilitis in acne patients being treated with oral isotretinoin. Methods: Forty Korean volunteers of Fitzpatrick skin types III and IV, having moderate acne, were enrolled and randomized to receive either isotretinoin with or without EPO for 8 weeks. The efficacy of treatment was evaluated on the basis of global acne grading system scores, number of inflammatory and noninflammatory lesions, TEWL, corneometry, physician’s global assessment, and patient satisfaction. Results: The results after 8 weeks of treatment showed that the TEWL of the lip increased significantly during isotretinoin treatment, whereas the TEWL of the hand dorsum showed no significant change. The increase of the TEWL of the lip was more definite in the control group than in the experimental group. The number of acne lesions decreased significantly in both groups, and there were no differences between them. Conclusion: Our study suggests that the addition of EPO improved xerotic cheilitis in acne patients being treated with oral isotretinoin. However, besides TEWL and corneometry assessments, additional studies are required for a complete understanding of the role of EPO in xerotic cheilitis in acne patients being treated with oral isotretinoin. (Ann Dermatol 26(6) 706∼712, 2014)

β-elemene Induces Caspase-dependent Apoptosis in Human Glioma Cells in vitro through the Upregulation of Bax and Fas/FasL and Downregulation of Bcl-2

Li, Chen-Long,Chang, Liang,Guo, Lin,Zhao, Dan,Liu, Hui-Bin,Wang, Qiu-Shi,Zhang, Ping,Du, Wen-Zhong,Liu, Xing,Zhang, Hai-Tao,Liu, Yang,Zhang, Yao,Xie, Jing-Hong,Ming, Jian-Guang,Cui, Yu-Qiong,Sun, Ying Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.23

Background: ${\beta}$-elemene, extracted from herb medicine Curcuma wenyujin has potent anti-tumor effects in various cancer cell lines. However, the activity of ${\beta}$-elemene against glioma cells remains unclear. In the present study, we assessed effects of ${\beta}$-elemene on human glioma cells and explored the underlying mechanism. Materials and Methods: Human glioma U87 cells were used. Cell proliferation was determined with MTT assay and colony formation assay to detect the effect of ${\beta}$-elemene at different doses and times. Fluorescence microscopy was used to observe cell apoptosis with Hoechst 33258 staining and change of glioma apoptosis and cell cycling were analyzed by flow cytometry. Real-time quantitative PCR and Western-blotting assay were performed to investigated the influence of ${\beta}$-elemene on expression levels of Fas/FasL, caspase-3, Bcl-2 and Bax. The experiment was divided into two groups: the blank control group and ${\beta}$-elemne treatment group. Results: With increase in the concentration of ${\beta}$-elemene, cytotoxic effects were enhanced in the glioma cell line and the concentration of inhibited cell viability ($IC_{50}$) was $48.5{\mu}g/mL$ for 24h. ${\beta}$-elemene could induce cell cycle arrest in the G0/G1 phase. With Hoechst 33258 staining, apoptotic nuclear morphological changes were observed. Activation of caspase-3,-8 and -9 was increased and the pro-apoptotic factors Fas/FasL and Bax were upregulated, while the anti-apoptotic Bcl-2 was downregulated after treatment with ${\beta}$-elemene at both mRNA and protein levels. Furthermore, proliferation and colony formation by U87 cells were inhibited by ${\beta}$-elemene in a time and does-dependent manner. Conclusions: Our results indicate that ${\beta}$-elemene inhibits growth and induces apoptosis of human glioma cells in vitro. The induction of apoptosis appears to be related with the upregulation of Fas/FasL and Bax, activation of caspase-3,-8 and -9 and downregulation of Bcl-2, which then trigger major apoptotic cascades.

Protein Kinase A Phosphorylates DIX3 and Regulates the Function of D1X3 During Osteoblast Differentiation

( Hong Yan Li ),( Hyung Min Jeong ),( You Hee Choi ),( Ju Hee Kim ),( Joong Kook Choi ),( Chang Yeol Yeo ),( Hye Gwang Jeong ),( Tae Cheon Jeong ),( Chang Ju Chun ),( Kwang Youl Lee ) 전남대학교 약품개발연구소 2014 약품개발연구지 Vol.23 No.-

Protein kinase A (PKA), a serine/threonine kinase, regulates bone formation, and enhances Bone morphogenetic protein (BMP)-induced osteoblast differentiation. However, the mechanisms of how PKA controls the cellular response to BMP are not well known. We investigated the effects of modulating PKA activity during BMP2-induced osteoblast differentiation, and found that PKA regulates the function of Dlx3. Dlx] plays crucial roles in osteoblast differentiation and it is expressed in most skeletal elements during development. We found that PKA activation increases BMP2-induced expression of Dlx3 protein, and enhances the protein stability, DNA binding, and transcriptional activity of Dlx3. In addition, PKA activation induces the phosphorylation of Dlx3 at consensus PKA phosphorylation target site(s). Lastly, substitution of serine 10 in Dlx3 to alanine significantly reduces, if not completely abolishes, the phosphorylation of Dlx3 and the regulation ofDlx3 function by PKA. These results suggest that Dlx3 is a novel target ofPKA, and that PKA mediates BMP signaling during osteoblast differentiation, at least in part, by phosphorylating Dlx3 and modulating the protein stability and function ofDlx3. J. Cell. Biochem. 115: 2004-2011, 2014. ⓒ 2014 Wiley Periodicals, Inc.

Safety and antifatigue effect of Korean Red Ginseng: a randomized, double-blind, and placebo-controlled clinical trial

Li Zhang,Xiaoyun Chen,Yanqi Cheng,Qilong Chen,Hongsheng Tan,Dongwook Son,Dongpill Chang,Zhaoxiang Bian,Hong Fang,Hongxi Xu 고려인삼학회 2019 Journal of Ginseng Research Vol.43 No.4

Background: Korean Red Ginseng (KRG) is widely used for strengthening the immune system andfighting fatigue, especially in people with deficiency syndrome. However, there is concern that the longtermapplication or a high dose of KRG can cause “fireness” (上火in Chinese) because of its “dryness” (燥性in Chinese). The aim of this study was to assess the safety and efficacy of a 4-week treatment with KRGin participants with deficiency syndrome. Methods: This was a 4-week, randomized, double-blind, placebo-controlled clinical trial. A total of 180Chinese participants were randomly allocated to three groups: placebo control group, participants weregiven a placebo, 3.6 g/d; KRG 1.8 g and 3.6 g groups. The primary outcomes were the changes in firenessand safety evaluation (adverse events, laboratory tests, and electrocardiogram). The secondary outcomeswere the efficacy of KRG on fatigue, which include the following: traditional Chinese medicine (TCM)symptom scale and fatigue self-assessment scale. Results: Of the 180 patients, 174 completed the full study. After 4 weeks of KRG treatment, the Fire-heatsymptoms score including Excess fire-heat score and Deficient fire-heat score showed no significantchange as compared with placebo treatment, and no clinically significant changes in any safetyparameter were observed. Based on the TCM syndrome score and fatigue self-assessment score, TCMsymptoms and fatigue were greatly improved after treatment with KRG, which showed a dose- and timedependenteffect. The total effective rate was also significantly increased in the KRG groups. Conclusion: Our study revealed that KRG has a potent antifatigue effect without significant adverse effectsin people with deficiency syndrome. Although a larger sample size and longer treatment may berequired for a more definite conclusion, this clinical trial is the first to disprove the common conceptionof “fireness” related to KRG.

Effect of a New Hepatoprotective Agent, YH-439, on the Hepatobiliary Transport of Organic Cations (OCs): Selective Inhibition of Sinusoidal OCs Uptake without Influencing Glucose Uptake and Canalicular OCs Excretion

Hong Soon Sun,Li Hong,Choi Min Koo,Chung Suk Jae,Shim Chang Koo The Pharmaceutical Society of Korea 2005 Archives of Pharmacal Research Vol.28 No.3

The effect of a new hepatoprotective agent, YH-439, on the hepatobiliary transport of a model organic cation (OC), TBuMA (tributylmethylammonium), was investigated. The area under the plasma concentration-time curve (AUC) from time zero to 4 h following iv administration of TBuMA (6.6 $\mu$mol/kg) was increased significantly when YH-439 in corn oil (300 mg/kg) was orally administered to rats 24 h prior to the experiment. Nevertheless, the cumulative biliary excretion of TBuMA remained unchanged. As a consequence, the apparent biliary clearance ($CL_b$) of TBuMA was decreased significantly as a result of YH-439 pretreatment, consistent with the fact that the in vivo excretion clearance of TBuMA across the canalicular membrane ($CL_{exc}$) was not changed by the pretreatment. The in vitro uptake of TBuMA into isolated hepatocytes was decreased by one half by the pretreatment, owing to a decrease in the apparent V$_{max}$ and $CL_{linear}$, but the $K_m$ for the process remained constant. Most interestingly, however, the sinusoidal uptake of glucose, a nutrient, into hepatocytes was not influenced by the pretreatment, suggesting the YH-439 pretreatment specifically impaired the sinusoidal uptake of OCs. Thus, the OC-specific inhibition of hepatic uptake, without influencing the uptake of glucose, a nutrient, appeared to be associated with the hepatoprotective activity of YH-439.

Medicinal Chemistry : ARTICLE ; Protein Kinase A Phosphorylates DIx3 and Regulates the Function of Dlx3 During Osteoblast Differentiation

( Hong Yan Li ),( Hyung Min Jeong ),( You Hee Choi ),( Ju Hee Kim ),( Joong Kook Choi ),( Chang Yeol Yeo ),( Hye Gwang Jeong ),( Tae Cheon Jeong ),( Chang Ju Chun ),( Kwang Youl Lee ) 영남대학교 약품개발연구소 2015 영남대학교 약품개발연구소 연구업적집 Vol.25 No.-

Protein kinase A(PKA),a serine/threonin kinase, regulates bone formation,and enhances Bone morphogenetic protein(BMP)-induced osteoblast differentiation.However.the mechanisms of how PKA controls the cellular response to BMP are not well known.We innestigated the effects of modulating PKA activity during BMP2-induced osteoblast differentiation.and found that PKA regulates the function of Dlx3. DLx3 plays crucial roles in osteoblast diferentiation and it is expressed in most skeletal elements during development.We found that PKA activation increases BMP2-induced exprseeion of Dlx3 protein. and enhances the protein stability, DNA binding, and transcriptional activity of Dlx3. In addition. PKA activation induces the phosphorylation of Dlx3 at consensus PKA phosphorylation target site(s). Lastly, substitution of serine 10 in Dlx3 to alanine significantly reduces, if not completely abolistes, the phosphorylation of Dlx3 and the regulation of Dlx3 function by PKA. These results suggest ehat Dlx3 is a novel targer of PKA, and that PKA ,mediates BMP signaling during osteoblast differentiation,at least in part,by phosphorylating Dlx3 and modulating the protein stability and function ofDlx3.J.Cell.Biochem.115:2004-2011,2014.ⓒ2014 Wiley periodicals,lnc.

KLF4 suppresses the tumor activity of cutaneous squamous cell carcinoma (SCC) cells via the regulation of SMAD signaling and SOX2 expression

Li, Xue Mei,Kim, Soo Jung,Hong, Dong-Kyun,Jung, Kyoung Eun,Choi, Chong Won,Seo, Young-Joon,Lee, Jeung-Hoon,Lee, Young,Kim, Chang-Deok Elsevier 2019 Biochemical and biophysical research communication Vol.516 No.4

<P><B>Abstract</B></P> <P>Kruppel-like factor 4 (KLF4) is a zinc-finger transcription factor that plays a role in terminal differentiation of epidermal keratinocytes. There are conflicting reports regarding the role of KLF4 in tumor development, with both the tumor suppressive and/or oncogenic properties depending on different conditions and cell types. In this study, we investigated the functional importance of KLF4 in cutaneous squamous cell carcinoma (SCC). Immunohistochemistry showed that KLF4 expression was relatively low in SCC lesion compared to normal epidermis. To examine the effects of KFL4, we transduced SCC lines (SCC12 and SCC13 cells) with the KLF4-expressing recombinant adenovirus. Overexpression of KLF4 significantly decreased cell proliferation and colony forming activity. In addition, overexpression of KLF4 markedly reduced invasive potential, along with the downregulation of epithelial-mesenchymal transition (EMT)-related molecules. In a mechanistic study, KLF4 inhibited SOX2, of which expression is critical for tumor initiation and growth of SCC. Further investigations indicated that SOX2 expression is induced by TGF-β/SMAD signaling, and that overexpression of KLF4 inhibited SMAD signaling via upregulation of SMAD7, an important inhibitory SMAD molecule. Based on these data, KLF4 plays a tumor suppressive role in cutaneous SCC cells.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Overexpression of KLF4 decreased the cell proliferation, colony forming activity, invasion and EMT potential in cutaneous SCC cells. </LI> <LI> Overexpression of KLF4 decreased SOX2 level via inhibition of SMAD2 phosphorylation. </LI> <LI> Overexpression of KLF4 inhibited SMAD signaling via upregualtion of SMAD7, an inhibitory SMAD molecule. </LI> </UL> </P>