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Calcium and Calmodulin-Mediated Regulation of Gene Expression in Plants

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Molecular Plant 2009年第1期2卷 13-21页

作者： Min Chul Kim Woo Sik Chung Dae-Jin yun Moo je Cho Division of Applied Life Science (BK21 Program) Plant Molecular Biology and Biotechnology Research Center and Environmental Biotechnology National Core Research Center Gyeongsang National University Jinju 660-701 Korea

Sessile plants have developed a very delicate system to sense diverse kinds of endogenous developmental cues and exogenous environmental stimuli by using a simple Ca^2＋ ion. Calmodulin （CAM） is the predominant Ca^2＋ sensor and plays a crucial role in decoding the Ca^2＋ signatures into proper cellular responses in various cellular compartments in eukaryotes. A growing body of evidence points to the importance of Ca^2＋ and CaM in the regulation of the transcriptional process during plant responses to endogenous and exogenous stimuli. Here, we review recent progress in the identification of transcriptional regulators modulated by Ca^2＋ and CaM and in the assessment of their functional significance during plant signal transduction in response to biotic and abiotic stresses and developmental cues.

关键词： Abiotic/environmental stress calcium signaling/transport gene expression.

The change of anterior segment parameters after cataract surgery in normal-tension glaucoma

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International Journal of Ophthalmology(English edition) 2017年第8期10卷 1239-1245页

作者： Wonseok Lee Hyoung Won Bae Chart yun Kim Gong je Seong Institute of Vision Research Department of OphthalmologYonsei University College of Medicine Seou103722 Korea

AIM： To investigate the change of anterior chamber angle morphology and intraocular pressure （lOP） reduction after cataract surgery in patients with normal-tension glaucoma （NTG） using swept-source optical coherence tomography （SS-OCT）. METHODS： This prospective, comparative, observational study recruited patients into two groups. Group 1 was the control group including normal subjects except those with cataracts （cataract group, n=67 eyes of 67 patients）, and group 2 was NTG group including patients who were diagnosed with NTG and cataracts （n=43 eyes of 43 patients）, which were treated with phacoemulsification and intraocular lens implantation. Before surgery, and at postoperative 1 and 6too, anterior chamber angles were evaluated by SS-OCT under dark conditions using three- dimensional angle analysis scan protocol. Angle opening distance （AOD）, angle recess area （ARA）, and trabecular- iris surface area （TISA） at four quadrants （temporal, nasal, superior, and inferior） were calculated automatically by SS-OGT, after the observer marked scleral spurs. RESULTS： A total of 106 patients （54 males and 52 females） were enrolled in the study. Angle parameters, AOD, ARA, and TISA were increased after surgery in both groups. However, changes of angle parameters were only significant in group 2. In group 2, preoperative lOP was 13.2＋2.9 mm Hg, and postoperative lOP at 1 and 6mo were 10.5＋3.0 and 10.7＋2.8 mm Hg, respectively. In group 1, preoperative lOP was 12.42.8 mm Hg, and postoperative lOP at 1 and 6mo were 11.6＋2.5 and 12.0＋2.8 mm Hg, respectively. After cataract surgery, angle parameters changed significantly while IOP significantly reduced and was maintained in group 2 （P〈0.001）. The changes in angle parameters （＆AOD500, ATISAS00 at temporal; ＆AOD500, S, RA500 at nasal） were linearly correlated with postoperative IOP changes. CONCLUSION： Cataract surgery may have improved antedor chamber angle parameters and decreased lOP in NTG patients.

关键词： normal-tension glaucoma cataract surgery intraocular pressure reduction swept-source optical coherence tomography angle parameters

Controlling hypoxia-inducible factor-2α is critical for maintaining bone homeostasis in mice

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Bone Research 2019年第2期7卷 210-223页

作者： Sun Young Lee Ka Hyon Park Hyung-Gu Yu Eunbyul Kook Won-Hyun Song Gyuseok Lee jeong-Tae Koh Hong-In Shin je-Yong Choi yun Hyun Huh je-Hwang Ryu Department of Pharmacology and Dental Therapeutics School of DentistryChonnam National UniversityGwangju 61186Korea Research Center for Biomineralization Disorders School of DentistryChonnam National UniversityGwangju 61186Korea Department of Oral Pathology and IHBR School of DentistryKyungpook National UniversityDaegu 41940Korea Department of Biochemistry and Cell Biology BK21 Plus KNU Biomedical Convergence ProgramSkeletal Diseases Analysis CenterKorea Mouse Phenotyping Center (KMPC)School of MedicineKyungpook National UniversityDaegu 41944Korea School of Life Sciences Gwangju Institute of Science and TechnologyGwangju 61005Korea

Pathological bone loss is caused by an imbalance between bone formation and *** bone microenvironments are hypoxic,and hypoxia-inducible factor (HIF) is known to play notable roles in bone ***,the relevant functions of HIF-2α are not well ***,we have shown that HIF-2α deficiency in mice enhances bone mass through its effects on the differentiation of osteoblasts and *** vitro analyses revealed that HIF-2α inhibits osteoblast differentiation by targeting Twist2 and stimulates RANKL-induced osteoclastogenesis via regulation of *** addition,HIF-2α appears to contribute to the crosstalk between osteoblasts and osteoclasts by directly targeting RANKL in osteoprogenitor *** performed with osteoblast- and osteoclast-specific conditional knockout mice supported a role of HIF-2α in this ***-2α deficiency alleviated ovariectomy-induced bone loss in mice,and specific inhibition of HIF-2α with ZINC04179524 significantly blocked RANKLmediated ***,our results suggest that HIF-2α functions as a catabolic regulator in bone remodeling,which is critical for the maintenance of bone homeostasis.

关键词： is RANKL its via

Deflection angle switching with a metasurface based on phase-change nanorods [Invited]

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Chinese Optics Letters 2018年第5期16卷 38-41页

作者： Chulsoo Choi Sun-je Kim jeong-Geun yun Jangwoon Sung Seung-Yeol Lee Byoungho Lee School of Electrical and Computer Engineering and Inter-University Semiconductor Research Center Seoul National University Gwanak-Gu Gwanakro 1 Seoul 08826 South Korea School of Electronics Engineering Kyungpook National University Daegu 41566 South Korea

We propose the active metasurface using phase-change material Ge2Sb2Te5（GST）, which has two distinct phases so called amorphous and crystalline phases, for an ultrathin light path switching device. By arranging multiple anisotropic GST nanorods, the gradient metasurface, which has opposite directions of phase gradients at the two distinct phases of GST, is demonstrated theoretically and numerically. As a result, in the case of normal incidence of circularly polarized light at the wavelength of 1650 nm, the cross-polarized light deflects to-55.6° at the amorphous phase and ＋55.6° at the crystalline phase with the signal-to-noise ratio above 10 dB.

关键词： Deflection angle switching with a metasurface based on phase-change nanorods GST

Development of novel gene carrier using modified nano hydroxyapatite derived from equine bone for osteogenic differentiation of dental pulp stem cells

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Bioactive Materials 2021年第9期6卷 2742-2751页

作者： Myung Chul Lee Hoon Seonwoo Kyoung je Jang Shambhavi Pandey Jaewoon Lim Sangbae Park Jae Eun Kim yun-Hoon Choung Pankaj Garg Jong Hoon Chung Department of Biosystems&Biomaterials Science and Engineering Seoul National UniversitySeoul08826Republic of Korea Department of Biosystems Engineering Seoul National UniversitySeoul08826Republic of Korea Department of Industrial Machinery Engineering Sunchon National University315 Maegok-dongSunchon57922Republic of Korea Interdisciplinary Program in IT-Bio Convergence System Sunchon National UniversitySuncheon57922Republic of Korea Division of Agro-system Engineering Gyeongsang National University501 Jinju-daeroJinju52828Republic of Korea Institute of Agriculture&Life Science Gyeongsang National UniversityJinju52828Republic of Korea Research Institute for Agriculture and Life Sciences Seoul National UniversitySeoul08826Republic of Korea Department of Otolaryngology Ajou University School of MedicineSuwon16499Republic of Korea Ajou University Graduate School of Medicine Bk21 Plus Research Center for Biomedical SciencesSuwon16499Republic of Korea BK21 Global Smart Farm Educational Research Center Seoul National UniversitySeoul08826Republic of Korea

Hydroxyapatite(HA)is a representative substance that induces bone *** research team extracted nanohydroxyapatite(EH)from natural resources,especially equine bones,and developed it as a molecular biological ***(PEI)was used to coat the EH to develop a gene *** verify that PEI is well coated in the EH,we first observed the morphology and dispersity of PEI-coated EH(pEH)by electron *** pEH particles were well distributed,while only the EH particles were not distributed and ***,the existence of nitrogen elements of PEI on the surface of the pEH was confirmed by EDS,calcium concentration measurement and fourier transform infrared spectroscopy(FT-IR).Additionally,the pEH was confirmed to have a more positive charge than the 25 kD PEI by comparing the zeta *** a result of pGL3 transfection,pEH was better able to transport genes to cells than 25 kD *** verification as a gene carrier for pEH,we induced osteogenic differentiation of DPSCs by loading the BMP-2 gene in pEH(BMP-2/pEH)and delivering it to the *** a result,it was confirmed that osteogenic differentiation was promoted by showing that the expression of osteopontin(OPN),osteocalcin(OCN),and runt-related transcription factor 2(RUNX2)was significantly increased in the group treated with BMP-2/*** conclusion,we have not only developed a novel nonviral gene carrier that is better performing and less toxic than 25 kD PEI by modifying natural HA(the agricultural byproduct)but also proved that bone differentiation can be effectively promoted by delivering BMP-2 with pEH to stem cells.

关键词： Nanocomposites Biomedical applications Hydroxyapatite Polyethyleneimine Gene carrier Osteogenic differentiation

Gardenia jasminoides protects against cerulein-induced acute pancreatitis

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World Journal of Gastroenterology 2008年第40期14卷 6188-6194页

作者： Won-Seok Jung Young-Seok Chae Do-yun Kim Sang-Wan Seo Hee-je Park Gi-Sang Bae Tae-Hyeon Kim Hyo-jeong Oh Ki-Jung yun Rae-Kil Park Jong-Suk Kim Eun-Cheol Kim Sung-Yeon Hwang Sung-Joo Park Ho-Joon Song Department of Biochemistry Institute of Medical ScienceChonbuk National University Medical School Department of Herbology School of Oriental MedicineWonkwang University Kohwang Medical Institute College of MedicineKyung Hee University Department of internal medicine College of MedicineWonkwng University Department of Pathology College of MedicineWonkwng University Vestibulocochlear Research Center & Department of Microbiology College of MedicineWonkwng University Department of Oral & Maxillofacial Pathology Dental CollegeWonkwang University

AIM： To investigate the effect of Garden/a fasm/noides （GJ） on cerulein-induced acute pancreatitis （AP） in mice. METHODS： C57BL/6 mice weighing 18-20 g were divided into three groups. （1） Normal salinetreated group, （2） treatment with GJ at a dose of 0.1 g/kg, （3） treatment with GJ at a dose of 1 g/kg. GJ was administered orally （n = 6 per group） for 1 wk. Three hours later, the mice were given anintraperitoneal injection of cerulein （50 μg/kg）, a stable cholecystokinin （CCK） analogue, every hour for a total of 6h as described previously. The mice were sacrificed at 6 h after completion of cerulein injections. Blood samples were obtained to determine serum amylase, lipase and cytokine levels. The pancreas was rapidly removed for morphologic examination and scoring. A portion of pancreas was stored at -70℃ and prepared for the measurement of tissue myeloperoxidase （MPO） activity, an indicator of neutrophil sequestration, and for reverse-transcriptase PCR （RT-PCR） and real-time PCR measurements. RESULTS： Treatment with G.1 decreased significantly the severity of pancreatitis and pancreatitis-associated lung injury. Treatment with G.1 attenuated the severity of AP compared with saline-treated mice, as shown by reduction in pancreatic edema, neutrophil infiltration, serum amylase and lipase levels, serum cytokine levels, and mRNA expression of multiple inflammatory mediators. CONCLUSION： These results suggest that GJ attenuated the severity of AP as well as pancreatitisassociated lung injury.

关键词： Gardenia Jasminoides Acute pancreatitis Cerulein

Improvement of oxidation resistance in graphite for MgO-C refractory through surface modification

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Transactions of Nonferrous Metals Society of China 2014年第S1期24卷 119-124页

作者： Geun-Ho CHO Eun-Hee KIM Jing LI je-Hyun LEE Yeon-Gil JUNG yun-Ki BYEUN Chang-Yong JO School of Materials Engineering Changwon National University Technical Research Laboratories Pohang Research Laboratory Steelmaking Research Group POSCOPhohang Gyeongbuk 790-300 Korea High Temperature Materials Research Group Korea Institute of Materials Science Changwon Gyeongnam 641-831 Korea

Graphite, used as a carbon source in a conventional magnesia-carbon(MgO-C) refractory, was modified with an acid reagent, resulting in a negative charge on the surface of graphite, to enhance the coating efficiency of aluminum(Al) phase, which was compared to the pristine graphite through its dispersibity and oxidation behavior. The graphite particles with and without surface modification were added, respecticely, in an Al(NO3)3 suspension used as a coating reagent, and then filtered at room temperature. The modified graphite shows better disperbility than the pristine graphite, indicating that the coating efficiency of Al precursor is enhanced in the modified graphite. With respect to oxidation behavior, the modified graphite without the coating layer is totally reacted with oxygen at heat treatment of 900 °C in air. However, the Al-coated graphite starts to react with oxygen at heat treatment of 900 °C and fully reacted with oxygen at heat treatment of 1000 °C, showing the gray and white colors, respectively. It is verified that the Al layer is individually and uniformly formed on the surface of graphite and the oxidation resistance of graphite is enhanced owing to the increased coating efficiency of Al precursor.

关键词： refractory graphite surface modification aluminum coating

Genetic analysis and QTL mapping of a novel reduced height gene in common wheat (Triticum aestivum L.)

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Journal of Integrative Agriculture 2020年第7期19卷 1721-1730页

作者： ZHOU Chun-yun XIONG Hong-chun LI Yu-ting GUO Hui-jun XIE Yong-dun ZHAO Lin-shu GU Jia-yu ZHAO Shi-rong DING Yu-ping SONG Xi-yun LIU Lu-xiang School of Life Sciences Qingdao Agricultural UniversityQingdao 266109P.R.China Institute of Crop Sciences Chinese Academy of Agricultural Sciences/National Engineering Laboratory for Crop Molecular Breeding/National Center of Space Mutagenesis for Crop ImprovementBeijing 100081P.R.China

Low stature in wheat is closely associated with lodging resistance,and this impacts harvest index and grain *** discovery of novel dwarfing or semi-dwarfing genes can have great significance for dwarf wheat *** this study,we identified an EMS induced dwarf wheat mutant je0124 from the elite cultivar ***0124 possesses increased stem strength and a 33%reduction in plant height compared with wild *** acid(GA)treatment analysis suggested that je0124 was *** of the frequency distribution of plant height in four F,populations derived from crosses between je0124 and the relatively taller varieties Nongda 5181 and WT indicated that the dwarfism phenotype was quantitatively *** used two F,populations and 312 individuals from the reciprocal cross of Nongda 5181 and je0124 to map the quantitative trait locus(QTL)for reduced height to a 0.85-cM interval on chromosome *** mapping was done by using a combination of 660K SNP array-based bulked segregant analysis(BSA)and genetic linkage analysis,with logarithm of odds(LOD)scores of 5.34 and 5.78,***,this QTL accounted for 8.27-8.52%of the variation in the *** dwarf mutant je0124 and the newly discovered dwarfing gene on chromosome 2DL in this study will enrich genetic resources for dwarf wheat breeding.

关键词： reduced height gene wheat QTL BSA molecular marker

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全髋关节表面置换术后股骨近端骨密度的变化

中华外科杂志 2007年第16期45卷 1091-1094页

作者：廉永云 Yoo Myung-chul 裴福兴程惊秋冯卫 ChoYoon-je KimGung-il ChunSung-wook 四川大学华西医院骨科 Department of Orthopedic Surgery Kyung Hee University Hospital Seoul 130702 Korea 卫生部移植工程与移植免疫重点实验室

目的评价全髋关节表面置换术对股骨近端骨量变化的影响。方法 2002年7月至2005年6月,对行全髋关节表面置换术(表面置换组)和人工全髋关节置换术(全髋置换组)各26例患者作为研究对象,均在术前、术后3、6、12和24个月时对股骨近端按 Gruen... 详细信息

目的评价全髋关节表面置换术对股骨近端骨量变化的影响。方法 2002年7月至2005年6月,对行全髋关节表面置换术(表面置换组)和人工全髋关节置换术(全髋置换组)各26例患者作为研究对象,均在术前、术后3、6、12和24个月时对股骨近端按 Gruen 分区设为7个测量感兴趣区,表面置换组加股骨颈外上和内下区,应用双能 X 线吸收测定仪测定骨密度,比较两组术前和术后股骨近端骨密度变化。结果术后3、6、12和24个月时,表面置换组股骨近端骨密度分别降低5.8%、4.9%、2.6%和0.4%;测量感兴趣区1的骨密度术后6个月时降至89.7%,至24个月时增至103.8%;测量感兴趣区7的骨密度术后6个月时降至95.1%,24个月时增至103.7%;股骨颈部骨密度在术后6个月时即可恢复至术前水平,股骨颈外上区的骨密度术后3个月时降至97.1%,术后24个月时增至107.4%(P<0.05);股骨颈内下区的骨密度术后24个月时增至117.9%(P<0.05)。全髋置换组股骨近端骨密度分别降低7.0%、10.6%、1.0%和4.1%。测量感兴趣区1的骨密度术后6个月降至90.8%,术后24个月时为94.4%;测量感兴趣区7术后3个月降至94.2%,术后24个月时为96.7%。结论全髋关节表面置换术后股骨近端骨量可以得到有效保存和恢复。

关键词：关节成形术,置换,髋骨密度髋关节表面置换术