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        • KCI등재

          돼지 H-FABP 유전자의 다형성 및 경제 형질과의 연관성 구명

          최봉환,김태헌,이지웅,조용민,이혜영,조병욱,정일정 한국동물자원과학회 2003 한국축산학회지 Vol.45 No.5

          The purpose of this study was to detect association between genetic variation and economic trait in the porcine heart type fatty acid-binding protein gene as a candidate gene for the traits related with growth and meat quality in pigs. The H-FABP is a 15-kDa protein expressed in several tissues with high demand for fat metabolism such as cardiac and skeletal muscle and lactating mammary gland. H-FABP is small intracellular protein involved in fatty acid transport from the plasma membrane to the site of β-oxidation and/or triacylglycerol or phospholipid synthesis. In this study, H-FABP PCR-RFLP was performed in F_(2) population composed of 214 individuals form an intercross between Korean Native Boars and Landrace sows. PCR products form tow primer sets within H-FABP gene were amplified in 850bp and 700bp. Digestion of PCR products with the restriction digestion enzymes HaeⅢ and Hinf Ⅰ, revealed fragment length polymorphisms(RFL. Ps). The genotype frequencies from H-FABP/HaeⅢ was .29 for genotype DD, .53 for genotype Dd, and .15 for genotype dd, respectively. The genotype frequencies of HH, Hh, and hh from H-FABP(hinf Ⅰ was .38, .41, and .20, respectively, in the population.Relationships between their genotypes and economic traits were estimated. In H-FABP/HaeⅢ locus, there were specific genotypes(Dd and dd) associated with economic traits such as body weight. In H-FABP/Hinf Ⅰ Iocus, Genotypes of HH and Hh associated with growth traits such as body weights at 5, 12, and 30 week of age (p<.05 or p<.001) and back fat thickness, body fat including abdominal and trimmed fat (p<.001) and intramuscular fat(p<.05). The 'H'allele was positivecly associated with gaining of body weight and fatness deposition. In conclusion, a significant association of the H-FABP gene from its genetic variation was found on body weight, intramuscular fat and backfat thickness.

        • SCISCIESCOPUS

          The clonal origins of leukemic progression of myelodysplasia

          Kim, T,Tyndel, M S,Kim, H J,Ahn, J-S,Choi, S H,Park, H J,Kim, Y-k,Yang, D-H,Lee, J-J,Jung, S-H,Kim, S Y,Min, Y H,Cheong, J-W,Sohn, S K,Moon, J H,Choi, M,Lee, M,Zhang, Z,Kim, D(D H) Nature Publishing Group 2017 Leukemia Vol.31 No.9

          <P>The genetics behind the progression of myelodysplasia to secondary acute myeloid leukemia (sAML) is poorly understood. In this study, we profiled somatic mutations and their dynamics using next generation sequencing on serial samples from a total of 124 patients, consisting of a 31 patient discovery cohort and 93 patients from two validation cohorts. Whole-exome analysis on the discovery cohort revealed that 29 of 31 patients carry mutations related to at least one of eight commonly mutated pathways in AML. Mutations in genes related to DNA methylation and splicing machinery were found in T-cell samples, which expand at the initial diagnosis of the myelodysplasia, suggesting their importance as early disease events. On the other hand, somatic variants associated with signaling pathways arise or their allelic burdens expand significantly during progression. Our results indicate a strong association between mutations in activated signaling pathways and sAML progression. Overall, we demonstrate that distinct categories of genetic lesions play roles at different stages of sAML in a generally fixed order.</P>

        • Common promoter polymorphism in monocyte differentiation antigen CD14 is associated with serum triglyceride levels and body mass index in non-diabetic individuals

          Shin, H. D.,Park, K. S.,Park, B. L.,Cheong, H. S.,Cho, Y. M.,Lee, H. K.,Lee, J.-Y.,Lee, J.-K.,Kim, H. T.,Han, B. G.,Kim, J. W.,Koh, I.,Kim, Y. J.,Oh, B.,Kimm, K.,Park, C. Blackwell Science Ltd 2006 Diabetic medicine Vol.23 No.1

          <P>Abstract</P><P>Aims </P><P>Growing evidence supports the hypothesis that chronic low-grade inflammation related to innate immunity may play an important role in the pathophysiology of Type 2 diabetes mellitus (T2DM). The monocyte differentiation antigen CD14 gene (<I>CD14</I>) acts as the receptor for lipopolysaccharide (LPS) and augments monocyte/macrophage inflammatory responses.</P><P>Methods </P><P>We have sequenced the gene, including all exons, exon/intron boundaries, and the −1.5 kb of the 5′ flanking region. Two common loci (minor allele frequency > 0.05) were genotyped in 775 T2DM patients and 316 control subjects recruited in the Korean T2DM Study.</P><P>Results </P><P>Eight polymorphisms, including four non-synonymous forms, were identified in <I>CD14</I>. No polymorphisms were found in association with T2DM. However, one common promoter SNP (<I>−260T>C</I>) was significantly associated with both the serum triglyceride level (TG) and body mass index (BMI) in non-diabetic control subjects. Individuals who carried the minor allele (C) had higher TG levels (1.65 ± 0.81 vs. 1.46 ± 0.80 mmol/l; <I>P</I> = 0.0007) and BMI (23.96 ± 3.00 vs. 23.28 ± 3.22 kg/m<SUP>2</SUP>; <I>P</I> = 0.04) as compared with subjects carrying T/T genotypes.</P><P>Conclusion </P><P>Our data suggest that lipid metabolism and obesity, important pathophysiological elements of T2DM and the metabolic syndrome, are regulated by complex mechanisms that include the CD14 gene polymorphism-mediated genetic propensity to non-specific inflammatory responses.</P>

        • 소화 효소 및 시간에 따른 고섬유소 사료의 In vitro 소화율 측정법

          오서영(S. Y. Oh),이민영(M. Y. Lee),김재만(J. M. Kim),이지환(J. H. Lee),윤원(W. Yun),송태화(T. H. Song),정연근(Y. K. Cheong),조진호(J. H. Cho) 충북대학교 동물생명과학연구소 2015 동물생명과학연구 Vol.7 No.-

          This study was conducted to investigate assay of high fiber diet in vitro digestibility according to digestive enzyme and time. Treatment of this study included: 1) CON (basic method) 2) T1 (sample amount: 2 times; enzyme level: 2 times) 3) T2 (sample amount: 2 times, enzyme level: 2 times, assay time: 1.5 times) 4) T3 (sample amount: 2 times, enzyme level: 2 times, assay time: 2 times). With regard to dry matter (DM), organic matter (OM) digestibility, T3 and CON were higher than T1 and T2 (P<0.05). Also, with regard to DM and OM digestibility by time of digestion, base was similar T2. In conclusion, in vitro digestibility was closely related to digestion time.

        • KCI등재후보

          Melatonin Attenuates Nitric Oxide Induced Oxidative Stress on Viability and Gene Expression in Bovine Oviduct Epithelial Cells, and Subsequently Increases Development of Bovine IVM/IVF Embryos

          J.T. Kim,H.Y. Jang,C.K. Park,H.T. Cheong,I.C. Park,양부근 아세아·태평양축산학회 2011 Animal Bioscience Vol.24 No.2

          The objective of the present study was to elucidate the fundamental mechanism of bovine oviduct epithelial cell (BOEC) co-culture on developmental capacity of bovine IVM/IVF embryos and to determine whether or not melatonin acts as an antioxidant in BOEC culture and subsequent embryo development. These studies examined the effects of melatonin against NO-induced oxidative stress on cell viability, lipid peroxidation (LPO) and the expression of antioxidant genes (CuZnSOD, MnSOD and Catalase) or apoptosis genes (Bcl-2, Caspase-3 and Bax) during BOECs culture. We also evaluated the developmental rates of bovine IVM/IVF embryos with BOEC co-culture, which were pre-treated with melatonin (1,000 M) in the presence or absence of sodium nitroprusside (SNP, 1,000 M) for 24 h. Cell viability in BOECs treated with SNP (50-2,000 M) decreased while melatonin addition (1-1,000 M) increased viability in a dose-dependent manner. Cell viability in melatonin plus SNP (1,000 M) gradually recovered according to increasing melatonin addition (1-1,000 M). The LPO products were measured by thiobarbituric acid (TBA) reaction for malondialdehyde (MDA). Addition of melatonin in BOEC culture indicated a dose-dependent decrease of MDA, and in the SNP group among BOECs treated with SNP or melatonin plus SNP groups MDA was significantly increased compared with SNP plus melatonin groups (p<0.05). In expression of apoptosis or antioxidant genes detected by RT-PCR, Bcl-2 and antioxidant genes were detected in melatonin or melatonin plus SNP groups, while Caspase-3 and Bax genes were only found in the SNP group. When bovine IVM/IVF embryos were cultured for 6-7 days under the BOEC co-culture system pre-treated with melatonin in the presence or absence of SNP, the highest developmental ability to blastocysts was obtained in the 1,000 M melatonin group. These results suggest that melatonin has an anti-oxidative effect against NO-induced oxidative stress on cell viability of BOECs and on the developmental competence of bovine IVM/IVF embryo co-culture with BOEC.

        • SCIESCOPUS

          An area-average approach to peening residual stress under multi-impacts using a three-dimensional symmetry-cell finite element model with plastic shots

          Kim, T.,Lee, J.H.,Lee, H.,Cheong, S.k. Scientific and Technical Press ; Elsevier Science 2010 MATERIALS AND DESIGN Vol.31 No.1

          We estimate realistic peening residual stress based on area-averaged solution using a 3D multi-impact symmetry-cell finite element (FE) model. The analytical model includes elaborate factors reflecting actual peening phenomena and plastic shot effect. Area-averaged solution is much closer to X-ray diffraction (XRD) experimental solution than four-node-averaged solution in plastic shot FE model. The area-averaged solution, moreover, converges to the perfect equi-biaxial stress state. From this, based on the area-averaged solution, we obtained the FE Almen curve, and then derived related equations among FE arc height, FE coverage and shot velocity. The FE Almen curve corresponds well with experimentally obtained by Kim et al. [Kim T, Lee JH, Lee H. An Effective 2D FE model with plastic shot for evaluation of peening residual stress. J Mater Process Technol, submitted for publication; Kim T, Lee H, Lee JH. A 3D phenomenological FE model for unique solution of peening stress due to multi-impacts. Int J Numer Methods Eng, submitted for publication]. Using the FE Almen curve, we examine the FE area-averaged solution in major peening materials. The FE solutions of surface, maximum compressive residual stress and deformation depth quite reach experimental solutions. The FE Almen curve is thus confirmed to be useful for estimation of residual stress solution. Consequently, we validated that the concept of area-averaged solution is the systematical analytical method for evaluation of real peening residual stress.

        • KCI등재

          Rb-Sr isotopic study of the Hwacheon granite in northern Gyeonggi massif, Korea: A case of spurious Rb-Sr whole rock age

          S.-T. Kwon,C.- S. Cheong,H. Sagong 한국지질과학협의회 2006 Geosciences Journal Vol.10 No.2

          Sagong, H., Kwon, S.-T., and Ree, J.-H., 2005, Mesozoic episodicmagmatism in South Korea and its tectonic implication. Tecton-ics, 24, TC5002, doi:10.1029.

        • Effects of Pyruvate and Taurine for In Vitro Preservation in Boar Semen and the Developmental Rates of Embryos Fertilized by Semen Treated with Antioxidant

          Jang H. Y.,Cheong H. T.,Kim C. I.,Park C. K.,Yang B. K. 한국동물번식학회 2005 Reproductive & developmental biology Vol.29 No.2

          Oxidative stress is one of the major causes of failure in in vitro storage of boar semen. Reactive oxygen species (ROS) are known to be important mediators of such stress. The present study examined the effects of pyruvate and taurine on sperm motility and expression of BAD, Cytochrome c, Caspase-3 and Cox-2 protein in in vitro storage of boar semen, and tested the effect of semen treated with antioxidant with or without hydrogen peroxide on the development of IVM/IVF porcine embryos. Semen samples were transported to the laboratory at 17℃ within 2 hr after collection and were treated with different concentration of pyruvate (1~10mM) and taurine (25~100mM) with or without 250uM H2O2 respectively. The supplementation of pyruvate and taurine increased sperm motility in boar semen during in vitro incubation at 37℃. Expression of apoptosis protein (BAD, cytochrome c, caspase-3 and cox-2) were reduced in the group of boar semen treated with pyruvate and taurine when compared to the other groups. The developmental rates of IVM/IVF porcine embryos fertilized by semen treated with pyruvate and taurine were significantly increased when compared to control (P<0.005). These results indicate that supplementation of pyruvate and taurine as antioxidants in boar semen extender can improve the semen quality and increase in vitro development of porcine IVM/IVF embryos when boar semen treated with antioxidants was used for in vitro fertilization.

        • Amelioration of neurodegenerative diseases by cell death-induced cytoplasmic delivery of humanin

          Park, T.Y.,Kim, S.H.,Shin, Y.C.,Lee, N.H.,Lee, R.K.C.,Shim, J.H.,Glimcher, L.H.,Mook-Jung, I.,Cheong, E.,Kim, W.K.,Honda, F.,Morio, T.,Lim, J.S.,Lee, S.K. Elsevier Science Publishers 2013 Journal of controlled release Vol.166 No.3

          Inhibition of the early intracellular event that triggers neurodegenerative cascades and reversal of neuronal cell death are essential for effective treatment of Alzheimer's disease (AD). In this study, a novel therapeutic for AD, a transducible humanin with an extended caspase-3 cleavage sequence (tHN-C3), was developed and showed multiple mechanisms of therapeutic action. These included targeted delivery of anti-apoptotic protein humanin through the blood-brain barrier (BBB) to neuronal cells, specific inhibition of caspase-3 activation to inhibit the early triggering of AD progression, and delivery of humanin into the cytoplasm of neuronal cells undergoing apoptosis where it exerts its anti-apoptotic functions effectively. The tHN-C3 prevented neuronal cell death induced by H<SUB>2</SUB>O<SUB>2</SUB>, or soluble Aβ<SUB>42</SUB>, via Bax binding. In animal models of AD induced by amyloid beta, in Tg2576 mice, and in the rat middle cerebral artery occlusion model of stroke, tHN-C3 effectively prevented neuronal cell death, inflammatory cell infiltration into the brain, and improved cognitive memory. The therapeutic effectiveness of tHN-C3 was comparable to that of Aricept, a clinically approved drug for AD treatment. Therefore, tHN-C3 may be a new remedy with multiple therapeutic functions targeting the early and late stages of neurodegeneration in AD and other brain injuries.

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