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Hong I, Aneshansley E, Chaudhury K, Talbot D. Stochastic microcontact model for the prediction of gear mechanical power loss. Tribology International 2023; 183:108413. [DOI: 10.1016/j.triboint.2023.108413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/19/2023]
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Dindar A, Chaudhury K, Hong I, Kahraman A, Wink C. An Experimental Methodology to Determine Components of Power Losses of a Gearbox. Journal of Tribology 2021; 143. [DOI: 10.1115/1.4049940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/19/2023]
Abstract
Abstract
In this study, an experimental methodology is presented to separate various components of the power loss of a gearbox. The methodology relies on two separate measurements. One is designed to measure total power loss of a gearbox housing a single spur gear pair under both loaded and unloaded conditions such that load-independent (spin) and load-dependent (mechanical) components can be separated. With the assumption that gear pair and rolling element bearings constitute the bulk of the gearbox power loss, a second measurement system designed to quantify rolling element bearing losses is proposed. With this setup, spin and mechanical power losses of rolling element bearings used in the gearbox experiments are measured. Combining the sets of gearbox and bearing data, power loss components attributable to the gear pair and rolling element bearings are quantified as a function of speed and torque. The results indicate that all gear and bearing related components are significant and a methodology such as the one proposed in this study is warranted.
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Affiliation(s)
- A. Dindar
- Department of Mechanical and Aerospace Engineering, The Ohio State University Galesburg, 201 W. 19th Avenue, Columbus, OH 43210
| | - K. Chaudhury
- Department of Mechanical and Aerospace Engineering, The Ohio State University Galesburg, 201 W. 19th Avenue, Columbus, OH 43210
| | - I. Hong
- Department of Mechanical and Aerospace Engineering, The Ohio State University Galesburg, 201 W. 19th Avenue, Columbus, OH 43210
| | - A. Kahraman
- Department of Mechanical and Aerospace Engineering, The Ohio State University Galesburg, 201 W. 19th Avenue, Columbus, OH 43210
| | - C. Wink
- Eaton Vehicle Group, Galesburg, MI 43053
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Hong I, Karmarkar A, Chan W, Andersen C, Kuo Y, Ottenbacher K, Goodwin J, Reistetter T. DESCRIPTIVE COMPARISONS BETWEEN PATIENTS WITH STROKE IN INPATIENT AND SKILLED NURSING REHABILITATION. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- I. Hong
- Division of Rehabilitation Sciences, University of Texas Medical Branch, Galveston, Texas
| | - A. Karmarkar
- Division of Rehabilitation Sciences, University of Texas Medical Branch, Galveston, Texas
| | - W. Chan
- Division of Rehabilitation Sciences, University of Texas Medical Branch, Galveston, Texas
| | - C. Andersen
- Division of Rehabilitation Sciences, University of Texas Medical Branch, Galveston, Texas
| | - Y. Kuo
- Division of Rehabilitation Sciences, University of Texas Medical Branch, Galveston, Texas
| | - K.J. Ottenbacher
- Division of Rehabilitation Sciences, University of Texas Medical Branch, Galveston, Texas
| | - J.S. Goodwin
- Division of Rehabilitation Sciences, University of Texas Medical Branch, Galveston, Texas
| | - T. Reistetter
- Division of Rehabilitation Sciences, University of Texas Medical Branch, Galveston, Texas
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Tang A, Hong I, Boddington L, Reynolds J, Garrett A, Etherington S, Rodger J. P135 Intermittent theta burst increases action potential threshold and spike firing in cortical layer 5 pyramidal neurons. Clin Neurophysiol 2017. [DOI: 10.1016/j.clinph.2016.10.257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Shin H, Cho K, Rhee C, Hong I, So D, Cho J, Park J. Hypoxia-inducible 5-eicosatetraenoates are potential markers for diagnosing obstructive sleep apnea. Sleep Med 2015. [DOI: 10.1016/j.sleep.2015.02.505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Chung J, Lee Y, Eun Y, Chung J, Kim S, Chon S, Oh S, Rhee S, Hong I. Single Nucleotide Polymorphism of Interleukin-18 and Interleukin-18 Receptor and the Risk of Papillary Thyroid Cancer. Exp Clin Endocrinol Diabetes 2015; 123:598-603. [DOI: 10.1055/s-0035-1559780] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- J. Chung
- Department of Otorhinolaryngology, School of Medicine, Kyung Hee University, Seoul, Korea, Hoegi-dong, Dongdaemun-gu, Seoul, Korea
| | - Y. Lee
- Department of Otorhinolaryngology, School of Medicine, Kyung Hee University, Seoul, Korea, Hoegi-dong, Dongdaemun-gu, Seoul, Korea
| | - Y. Eun
- Department of Otorhinolaryngology, School of Medicine, Kyung Hee University, Seoul, Korea, Hoegi-dong, Dongdaemun-gu, Seoul, Korea
| | - J. Chung
- Kohwang Medical Research Institute, School of Medicine, Kyung Hee University, Seoul, Korea
| | - S. Kim
- Kohwang Medical Research Institute, School of Medicine, Kyung Hee University, Seoul, Korea
| | - S. Chon
- Department of Endocrinology and Metabolism, School of Medicine, Kyung Hee University, Seoul, Korea
| | - S. Oh
- Department of Endocrinology and Metabolism, School of Medicine, Kyung Hee University, Seoul, Korea
| | - S. Rhee
- Department of Endocrinology and Metabolism, School of Medicine, Kyung Hee University, Seoul, Korea
| | - I. Hong
- Department of Nuclear Medicine, School of Medicine, Kyung Hee University, Seoul, Korea
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Abstract
Highly active antiretroviral therapy (HAART), using HIV protease inhibitors, is commonly used in the management of HIV infection. HIV protease inhibitors also have a direct effect on a key virulence factor of Candida albicans, its secreted aspartyl proteinase (Sap). Although protease inhibitors can attenuate Candida adhesion to human epithelial cells, their effects on adhesion to acrylic substances, which is a common component of oral appliances, is unknown. This study investigated whether protease inhibitors affect C. albicans adhesion to acrylic substances. C. albicans suspensions were pretreated with different concentrations of saquinavir, ritonavir or indinavir for 1 h and allowed to adhere on acrylic strips, which had been pretreated with pooled human saliva for 30 min, for another hour in the presence of each drug. The test groups showed a significantly lower degree of adhesion than the controls. Adhesion was reduced by 50% at drug concentrations of 100, 100 and 20 μmol l(-1) for saquinavir, ritonavir and indinavir respectively. In conclusion, protease inhibitors attenuated C. albicans adhesion to an acrylic surface in vitro in a dose-dependent manner, and different protease inhibitors exhibited different degrees of inhibition.
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Affiliation(s)
- C S P Tsang
- Oral Rehabilitation, Faculty of Dentistry, University of Hong Kong, Hong Kong, China.
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Hong I, Rho HS, Kim DH, Lee MO. Activation of LXRα induces lipogenesis in HaCaT cells. Arch Pharm Res 2010; 33:1443-9. [PMID: 20945144 DOI: 10.1007/s12272-010-0919-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2010] [Revised: 07/25/2010] [Accepted: 08/09/2010] [Indexed: 12/20/2022]
Abstract
The oxysterol nuclear receptors, LXRα (liver X receptor α; NR1H3) and LXRβ (NR1H2), coordinately regulate the expression of genes involved in lipid metabolism, anti-inflammation, and cholesterol transport. Previous studies have demonstrated that ligands of LXRα are important in the maintenance of the normal epidermal barrier function and keratinocyte differentiation. In this study, we examined whether LXRα and its ligands regulate lipid synthesis in HaCaT cells, a spontaneously transformed human keratinocyte cell line. When HaCaT cells were treated with the LXRα ligand TO901317, lipid droplets accumulated in the majority of cells, which were stained by Oil Red O. A luciferase reporter construct containing the LXR response element was activated about fourfold in HaCaT cells by TO901317 treatment, suggesting that LXR has a role in lipid synthesis in these cells. The expression of LXRα target genes, such as those encoding sterol regulatory binding protein and fatty acid synthase, were induced time dependently by TO901317, as measured by RT-PCR and western blotting. The expression of PPAR-α, -β, and -γ which regulate lipid metabolism, was also increased by TO901317 treatment. In contrast, TO901317 reduced the lipopolysaccharide-induced expression of cyclooxygenase 2 and inducible nitric oxide synthase in HaCaT cells. These results indicate that LXRα activation leads to lipogenesis in keratinocytes, which may enhance the epidermal barrier function of the skin.
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Affiliation(s)
- Il Hong
- College of Pharmacy and Bio-MAX Institute, Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, 151-742, Korea
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Lee W, Yun GS, Nam Y, Hong I, Kim JB, Park HK, Tobias B, Liang T, Domier CW, Luhmann NC. Comparative study between the reflective optics and lens based system for microwave imaging system on KSTAR. Rev Sci Instrum 2010; 81:10D932. [PMID: 21033960 DOI: 10.1063/1.3491189] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Recently, two-dimensional microwave imaging diagnostics such as the electron cyclotron emission imaging (ECEI) system and microwave imaging reflectometry (MIR) have been developed to study magnetohydrodynamics instabilities and turbulence in magnetically confined plasmas. These imaging systems utilize large optics to collect passive emission or reflected radiation. The design of this optics can be classified into two different types: reflective or refractive optical systems. For instance, an ECEI/MIR system on the TEXTOR tokamak [Park et al., Rev. Sci. Instrum. 75, 3787 (2004)] employed the reflective optics which consisted of two large mirrors, while the TEXTOR ECEI upgrade [B. Tobias et al., Rev. Sci. Instrum. 80, 093502 (2009)] and systems on DIII-D, ASDEX-U, and KSTAR adopted refractive systems. Each system has advantages and disadvantages in the standing wave problem and optical aberrations. In this paper, a comparative study between the two optical systems has been performed in order to design a MIR system for KSTAR.
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Affiliation(s)
- W Lee
- POSTECH, Pohang, Gyeongbuk 790-784, Republic of Korea.
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Park HK, Hong I, Kim M, Yun GS, Lee W, Kim J, Tobias B, Domier CW, Luhmann NC, Kim KW. Microwave imaging reflectometry studies for turbulence diagnostics on KSTAR. Rev Sci Instrum 2010; 81:10D933. [PMID: 21033961 DOI: 10.1063/1.3499606] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The first prototype microwave imaging reflectometry (MIR) system [H. Park et al., Rev. Sci. Instrum. 74, 4239 (2004)] clearly demonstrated the shortcomings of conventional reflectometry when the probe beam encountered a large amplitude and/or high fluctuation wavenumber at the reflection layer in laboratory tests, the distinctive advantages shown in these tests were not fully realized in the plasma operation. To understand the discrepancies, the MIR system performance has been thoroughly investigated at POSTECH. In this paper, a possible cause of the MIR performance degradation on TEXTOR will be presented together with a concept of multifrequency MIR system design that will be developed for KSTAR.
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Affiliation(s)
- H K Park
- Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784, Korea.
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Na TY, Shin YK, Roh KJ, Kang SA, Hong I, Oh SJ, Seong JK, Park CK, Choi YL, Lee MO. Liver X receptor mediates hepatitis B virus X protein-induced lipogenesis in hepatitis B virus-associated hepatocellular carcinoma. Hepatology 2009; 49:1122-31. [PMID: 19105208 DOI: 10.1002/hep.22740] [Citation(s) in RCA: 125] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
UNLABELLED Although hepatitis B virus X protein (HBx) has been implicated in abnormal lipid metabolism in hepatitis B virus (HBV)-associated hepatic steatosis, its underlying molecular mechanism remains unclear. Liver X receptor (LXR) plays an important role in regulating the expression of genes involved in hepatic lipogenesis. Here we demonstrate that LXRalpha and LXRbeta mediate HBV-associated hepatic steatosis. We have found that HBx induces the expression of LXR and its lipogenic target genes, such as sterol regulatory element binding protein-1c (SREBP-1c), fatty acid synthase (FAS), and peroxisome proliferator-activated receptor, and this is accompanied by the accumulation of lipid droplets. RNA interference with LXR expression decreases the amount of lipid droplets as well as the expression of the lipogenic genes, and this indicates that HBx-induced lipogenesis is LXR-dependent. LXRalpha and HBx colocalize in the nucleus and are physically associated. HBx induces the transactivation function of LXRalpha by recruiting CREB binding protein to the promoter of the target gene. Furthermore, we have observed that expression of LXR is increased in the livers of HBx-transgenic mice. Finally, there is a significant increase in the expression of LXRbeta (P = 0.036), SREBP-1c (P = 0.008), FAS, and stearoyl-coenyzme A desaturase-1 (P = 0.001) in hepatocellular carcinoma (HCC) in comparison with adjacent nontumorous nodules in human HBV-associated HCC specimens. CONCLUSION Our results suggest a novel association between HBx and LXR that may represent an important mechanism explaining HBx-induced hepatic lipogenesis during HBV-associated hepatic carcinogenesis.
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Affiliation(s)
- Tae-Young Na
- College of Pharmacy, Seoul National University, Seoul, Korea
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Kang BY, Kim S, Lee KH, Lee YS, Hong I, Lee MO, Min D, Chang I, Hwang JS, Park JS, Kim DH, Kim BG. Transcriptional profiling in human HaCaT keratinocytes in response to kaempferol and identification of potential transcription factors for regulating differential gene expression. Exp Mol Med 2008; 40:208-19. [PMID: 18446059 DOI: 10.3858/emm.2008.40.2.208] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Kaempferol is the major flavonol in green tea and exhibits many biomedically useful properties such as antioxidative, cytoprotective and anti-apoptotic activities. To elucidate its effects on the skin, we investigated the transcriptional profiles of kaempferol-treated HaCaT cells using cDNA microarray analysis and identified 147 transcripts that exhibited significant changes in expression. Of these, 18 were up-regulated and 129 were down-regulated. These transcripts were then classified into 12 categories according to their functional roles: cell adhesion/cytoskeleton, cell cycle, redox homeostasis, immune/defense responses, metabolism, protein biosynthesis/modification, intracellular transport, RNA processing, DNA modification/ replication, regulation of transcription, signal transduction and transport. We then analyzed the promoter sequences of differentially-regulated genes and identified over-represented regulatory sites and candidate transcription factors (TFs) for gene regulation by kaempferol. These included c-REL, SAP-1, Ahr-ARNT, Nrf-2, Elk-1, SPI-B, NF-kappaB and p65. In addition, we validated the microarray results and promoter analyses using conventional methods such as real-time PCR and ELISA-based transcription factor assay. Our microarray analysis has provided useful information for determining the genetic regulatory network affected by kaempferol, and this approach will be useful for elucidating gene-phytochemical interactions.
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Affiliation(s)
- Byung Young Kang
- School of Chemical and Biological Engineering, Seoul National University, Seoul 151-742, Korea
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Lee MH, Hong I, Kim M, Lee BH, Kim JH, Kang KS, Kim HL, Yoon BI, Chung H, Kong G, Lee MO. Gene expression profiles of murine fatty liver induced by the administration of methotrexate. Toxicology 2008; 249:75-84. [DOI: 10.1016/j.tox.2008.04.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2008] [Revised: 04/14/2008] [Accepted: 04/14/2008] [Indexed: 10/22/2022]
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Hong I, Seo HW, Lee MH, Kim JW, Chung JH, Lee BH, Lee MO. Establishment of Reporter Cell Lines that Monitor Activities of Hypoxia Inducible Factor-1, P53 and Nur77 for Assessment of Carcinogenicity. Toxicol Res 2007. [DOI: 10.5487/tr.2007.23.3.231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Lee MH, Hong I, Kim M, Lee BH, Kim JH, Kang KS, Kim HL, Yoon BI, Chung H, Kong G, Lee MO. Gene expression profiles of murine fatty liver induced by the administration of valproic acid. Toxicol Appl Pharmacol 2006; 220:45-59. [PMID: 17292431 DOI: 10.1016/j.taap.2006.12.016] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2006] [Revised: 12/13/2006] [Accepted: 12/13/2006] [Indexed: 11/26/2022]
Abstract
Valproic acid (VPA) has been used as anticonvulsants, however, it induces hepatotoxicity such as microvesicular steatosis and necrosis in the liver. To explore the mechanisms of VPA-induced steatosis, we profiled the gene expression patterns of the mouse liver that were altered by treatment with VPA using microarray analysis. VPA was orally administered as a single dose of 100 mg/kg (low-dose) or 1000 mg/kg (high-dose) to ICR mice and the animals were killed at 6, 24, or 72 h after treatment. Serum alanine aminotransferase and aspartate aminotransferase levels were not significantly altered in the experimental animals. However, symptoms of steatosis were observed at 72 h with low-dose and at 24 h and 72 h with high-dose. After microarray data analysis, 1910 genes were selected by two-way ANOVA (P<0.05) as VPA-responsive genes. Hierarchical clustering revealed that gene expression changes depended on the time rather than the dose of VPA treatment. Gene profiling data showed striking changes in the expression of genes associated with lipid, fatty acid, and steroid metabolism, oncogenesis, signal transduction, and development. Functional categorization of 1156 characteristically up- and down-regulated genes (cutoff >1.5-fold) revealed that 60 genes were involved in lipid metabolism that was interconnected with biological pathways for biosynthesis of triglyceride and cholesterol, catabolism of fatty acid, and lipid transport. This gene expression profile may be associated with the known steatogenic hepatotoxicity of VPA and it may provide useful information for prediction of hepatotoxicity of unknown chemicals or new drug candidates through pattern recognition.
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Kim S, Hong I, Hwang JS, Choi JK, Rho HS, Kim DH, Chang I, Lee SH, Lee MO, Hwang JS. Phytosphingosine stimulates the differentiation of human keratinocytes and inhibits TPA-induced inflammatory epidermal hyperplasia in hairless mouse skin. Mol Med 2006; 12:17-24. [PMID: 16838068 PMCID: PMC1514555 DOI: 10.2119/2006-00001.kim] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2006] [Accepted: 03/21/2006] [Indexed: 01/22/2023] Open
Abstract
The binding of sphingoid bases to peroxisome proliferator-activated receptor (PPAR) has been detected in a solid-phase binding assay. However, sphingoid base-induced changes in PPAR transactivation activity have not been examined. In this report, we show by reporter gene analyses that phytosphingosine (PS), a natural sphingoid base, activates the transcriptional activity of PPARs in the immortalized human keratinocyte, HaCaT. Real-time PCR analyses showed that the mRNA level of PPARgamma was increased after PS treatment in HaCaT cells in a dose- and time-dependent manner. Because PPARs play important roles in skin barrier homeostasis by regulating epidermal cell growth, terminal differentiation, and inflammatory response, we examined the effect of PS on normal human epidermal keratinocytes (NHEKs) and mouse skin. PS increased the production of cornified envelope in NHEKs by approximately 1.8-fold compared with controls. Epidermal differentiation marker proteins such as involucrin, loricrin, and keratin1 were also increased in PS-treated NHEKs, by ELISA or Western blotting analysis. A [(3)H]thymidine incorporation assay showed that PS inhibited DNA synthesis in NHEKs to 20% compared with controls. The antiproliferative and anti-inflammatory effects of PS were examined in a mouse model of irritant contact dermatitis produced by topical application of 12-O-tetradecanoylphorbol-13-acetate (TPA). PS blocked epidermal thickening and edema and the infiltration of inflammatory cells into the dermis in the skin of TPA-treated hairless mice. The anti-inflammatory effects of PS were confirmed by the observation that PS blocked the TPA-induced generation of prostaglandin E(2) in peripheral mononuclear leukocytes. Taken together, our results provide an insight into the multiple regulatory roles of PS in epidermal homeostasis, and furthermore point to the potential use of PS as a therapeutic agent in the treatment of inflammatory and proliferative cutaneous diseases.
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Affiliation(s)
- Sujong Kim
- Skin Research Institute, AmorePacific Corporation R&D Center, Kyounggi, South
Korea
- Address correspondence and reprint requests to Dr. Sujong Kim; Jae Sung
Hwang, Skin Research Institute, Amore-Pacific Corporation R&D Center, 314-1 Bora-ri, Kiheung-eup, Yongin-si, Kyounggi-do 449-729, Korea. Phone: +82-31-280-5962; fax: +82-31-282-6063; e-mail: (Sujong Kim); (Jae Sung Hwang)
| | - Il Hong
- College of Pharmacy and Bio-MAX Institute, Seoul National University, Seoul, South
Korea
| | - Jung Sun Hwang
- Skin Research Institute, AmorePacific Corporation R&D Center, Kyounggi, South
Korea
| | - Jin Kyu Choi
- Skin Research Institute, AmorePacific Corporation R&D Center, Kyounggi, South
Korea
| | - Ho Sik Rho
- Skin Research Institute, AmorePacific Corporation R&D Center, Kyounggi, South
Korea
| | - Duck Hee Kim
- Skin Research Institute, AmorePacific Corporation R&D Center, Kyounggi, South
Korea
| | - Ihseop Chang
- Skin Research Institute, AmorePacific Corporation R&D Center, Kyounggi, South
Korea
| | - Seung Hun Lee
- Department of Dermatology, Yonsei University College of Medicine, Seoul, South
Korea
| | - Mi-Ock Lee
- College of Pharmacy and Bio-MAX Institute, Seoul National University, Seoul, South
Korea
| | - Jae Sung Hwang
- Skin Research Institute, AmorePacific Corporation R&D Center, Kyounggi, South
Korea
- Address correspondence and reprint requests to Dr. Sujong Kim; Jae Sung
Hwang, Skin Research Institute, Amore-Pacific Corporation R&D Center, 314-1 Bora-ri, Kiheung-eup, Yongin-si, Kyounggi-do 449-729, Korea. Phone: +82-31-280-5962; fax: +82-31-282-6063; e-mail: (Sujong Kim); (Jae Sung Hwang)
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Kim S, Lee K, Hong I, Hwang JS, Rho HS, Kim DH, Chang I, Lee M, Lee Y, Hwang JS. Genistein Stimulates Differentiation in Epidermal Keratinocyte through Activation of PPARs. FASEB J 2006. [DOI: 10.1096/fasebj.20.4.a612-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sujong Kim
- Skin Research InstituteAmorepacific R&D Center314‐1, Sanggaldong, KiheungguYonginsi446‐729Korea, Republic of
| | - Ki‐Hwan Lee
- Department of BiochemistryCollege of MedicineHanyang University17 Haengdang‐dong, Seongdong‐GuSeoul133‐791Korea, Republic of
| | - Il Hong
- College of Pharmacy and Bio‐MAX InstituteSeoul National UniversitySan 56‐1 Sillim, KwanakSeoul151‐742Korea, Republic of
| | - Jung Sun Hwang
- Skin Research InstituteAmorepacific R&D Center314‐1, Sanggaldong, KiheungguYonginsi446‐729Korea, Republic of
| | - Ho Sik Rho
- Skin Research InstituteAmorepacific R&D Center314‐1, Sanggaldong, KiheungguYonginsi446‐729Korea, Republic of
| | - Duck Hee Kim
- Skin Research InstituteAmorepacific R&D Center314‐1, Sanggaldong, KiheungguYonginsi446‐729Korea, Republic of
| | - Ihseop Chang
- Skin Research InstituteAmorepacific R&D Center314‐1, Sanggaldong, KiheungguYonginsi446‐729Korea, Republic of
| | - Mi‐Ock Lee
- College of Pharmacy and Bio‐MAX InstituteSeoul National UniversitySan 56‐1 Sillim, KwanakSeoul151‐742Korea, Republic of
| | - Yong‐Sung Lee
- Department of BiochemistryCollege of MedicineHanyang University17 Haengdang‐dong, Seongdong‐GuSeoul133‐791Korea, Republic of
| | - Jae Sung Hwang
- Skin Research InstituteAmorepacific R&D Center314‐1, Sanggaldong, KiheungguYonginsi446‐729Korea, Republic of
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Abstract
We investigated the effects of the aqueous extract of Solanum lyratum THUNB. (Solanaceae) (SLAE) on the anaphylactic reactions. SLAE inhibited compound 48/80-induced anaphylactic shock 100% with a dose of 1.0 mg/g body weight (BW). When SLAE was pretreated at concentration ranging from 0.0001-1.0 mg/g BW, the serum histamine levels were reduced in a dose-dependent manner. Passive cutaneous anaphylaxis also inhibited to 69.3% by oral administration of SLAE (0.05 mg/g BW). Moreover, SLAE dose-dependently inhibited the histamine release from the rat peritoneal mast cells (RPMC) by compound 48/80. The level of cAMP in RPMC, when SLAE was added, significantly increased compared with that of normal control. These results indicate that SLAE possess strong antianaphylactic activity.
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Affiliation(s)
- B Kang
- Department of Oriental Pharmacy, College of Pharmacy, Wonkwang University, Iksan, Chonbuk, South Korea
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