A novel mode of TRPML3 regulation by extracytosolic pH absent in the varitint-waddler phenotype

Kim, Hyun Jin,Li, Qin,Tjon-Kon-Sang, Sandra,So, Insuk,Kiselyov, Kirill,Soyombo, Abigail A,Muallem, Shmuel Wiley (John WileySons) 2008 The EMBO journal Vol.27 No.8

<P>TRPML3 belongs to the TRPML subfamily of the transient receptor potential (TRP) channels. The A419P mutation in TRPML3 causes the varitint-waddler phenotype as a result of gain-of-function mutation (GOF). Regulation of the channels and the mechanism by which the A419P mutation leads to GOF are not known. We report here that TRPML3 is a Ca(2+)-permeable channel with a unique form of regulation by extracytosolic (luminal) H(+) (H(+)(e-cyto)). Regulation by H(+)(e-cyto) is mediated by a string of three histidines (H252, H273, H283) in the large extracytosolic loop between transmembrane domains (TMD) 1 and 2. Each of the histidines has a unique role, whereby H252 and H273 retard access of H(+)(e-cyto) to the inhibitory H283. Notably, the H283A mutation has the same phenotype as A419P and locks the channel in an open state, whereas the H283R mutation inactivates the channel. Accordingly, A419P eliminates regulation of TRPML3 by H(+)(e-cyto), and confers full activation to TRPML3(H283R). Activation of TRPML3 and regulation by H(+)(e-cyto) are altered by both the alpha-helix-destabilizing A419G and the alpha-helix-favouring A419M and A419K. These findings suggest that regulation of TRPML3 by H(+)(e-cyto) is due to an effect of the large extracytosolic loop on the orientation of fifth TMD and thus pore opening and show that the GOF of TRPML3(A419P) is due to disruption of this communication.</P>

Tight junction protein 1 is regulated by transforming growth factor-β and contributes to cell motility in NSCLC cells

( So Hee Lee ),( A Rome Paek ),( Kyung Sil Yoon ),( Seok Hyun Kim ),( Soo Young Lee ),( Hye Jin You ) 생화학분자생물학회(구 한국생화학분자생물학회) 2015 BMB Reports Vol.48 No.2

Tight junction protein 1 (TJP1), a component of tight junction, has been reported to play a role in protein networks as an adaptor protein, and TJP1 expression is altered during tumor development. Here, we found that TJP1 expression was increased at the RNA and protein levels in TGF-β-stimulated lung cancer cells, A549. SB431542, a type-I TGF-β receptor inhibitor, as well as SB203580, a p38 kinase inhibitor, significantly abrogated the effect of TGF-β on TJP1 expression. Diphenyleneiodonium, an NADPH oxidase inhibitor, also attenuated TJP1 expression in response to TGF-β in lung cancer cells. When TJP1 expression was reduced by shRNA lentiviral particles in A549 cells (A549-sh TJP1), wound healing was much lower than in cells infected with control viral particles. Taken together, these data suggest that TGF-β enhances TJP1 expression, which may play a role beyond structural support in tight junctions during cancer development. [BMB Reports 2015; 48(2): 115-120]

Differential expression of soybean SLTI100 gene encoding translation elongation factor 1A by abiotic stresses

정은숙,Chang-Woo Cho,Hyun-A So,Bo-Hyun Yun,이재헌 한국식물생명공학회 2009 식물생명공학회지 Vol.36 No.3

The translation elongation factor 1A, eEF1A, catalyzes the binding of aminoacyl-tRNA to the A-site of the ribosome by a GTP-dependent mechanism. By subtractive suppression hybridization technique, we have isolated a soybean low-temperature inducible gene, SLTI100 encoding translation elongation factor 1A. Multiple sequence alignments and phylogenic analysis showed that SLTI100 and other eEF1As originated from diverse organisms are highly conserved. RNA expression of SLTI100 was specifically induced by low temperature, high salt, ABA, or drought stress. Based on the subcellular localization of the corresponding gene product fused to GFP, we were able to confirm that SLTI100-GFP was restricted to the nucleus and cytoplasm. We propose that soybean eEF1A may play an important role in translational regulation during abiotic stress responses in plants.

Differential expression of soybean SLTI100 gene encoding translation elongation factor 1A by abiotic stresses

Chung, Eun-Sook,Cho, Chang-Woo,So, Hyun-A,Yun, Bo-Hyun,Lee, Jai-Heon The Korean Society of Plant Biotechnology 2009 식물생명공학회지 Vol.36 No.3

The translation elongation factor 1A, eEF1A, catalyzes the binding of aminoacyl-tRNA to the A-site of the ribosome by a GTP-dependent mechanism. By subtractive suppression hybridization technique, we have isolated a soybean low-temperature inducible gene, SLTI100 encoding translation elongation factor 1A. Multiple sequence alignments and phylogenic analysis showed that SLTI100 and other eEF1As originated from diverse organisms are highly conserved. RNA expression of SLTI100 was specifically induced by low temperature, high salt, ABA, or drought stress. Based on the subcellular localization of the corresponding gene product fused to GFP, we were able to confirm that SLTI100-GFP was restricted to the nucleus and cytoplasm. We propose that soybean eEF1A may play an important role in translational regulation during abiotic stress responses in plants.

Ectopic expression of mungbean ubiquitin conjugating enzyme E2 enhances resistance to osmotic stress in Arabidopsis

Eunsook Chung,Chang-Woo Cho,Hyun-A So,Kyoung-Mee Kim,Selvam Ayarpadikannan,Kenneth Ryan Schraufnagle,Ji Hae Park,Se Hyun Park,Jai-Heon Lee 한국육종학회 2013 한국육종학회 심포지엄 Vol.2013 No.07

The ubiquitin conjugating enzyme E2 (UBC E2) mediates selective ubiquitination, acting with E1 and E3 enzymes to designate specific proteins for subsequent degradation. In the present study, we characterized the function of the mung bean VrUBC1 gene (Vigna radiata UBC 1). RNA gel-blot analysis showed that VrUBC1 mRNA expression was induced by either dehydration, high salinity or by the exogenous abscisic acid (ABA), but not by low temperature or wounding. Biochemical studies of VrUBC1 recombinant protein and complementation of yeast ubc4/5 by VrUBC1 revealed that VrUBC1 encodes a functional UBC E2. To understand the function of this gene in development and plant responses to osmotic stresses, we overexpressed VrUBC1 in Arabidopsis (Arabidopsis thaliana). The VrUBC1-overexpressing plants displayed highly sensitive responses to ABA and osmotic stress during germination, enhanced ABA- or salt-induced stomatal closing, and increased drought stress tolerance. The expression levels of a number of key ABA signaling genes were increased in VrUBC1-overexpressing plants compared to the wild-type plants. Yeast two-hybrid and bimolecular fluorescence complementation demonstrated that VrUBC1 interacts with AtVBP1 (A. thaliana VrUBC1 Binding Partner 1), a C3HC4-type RING E3 ligase. Overall, these results demonstrate that VrUBC1 plays a positive role in osmotic stress tolerance through transcriptional regulation of ABA-related genes and possibly through interaction with a novel RING E3 ligase.

야생 버섯을 복용 후 발생한 재생불량성 빈혈 1예

조소영,곽명옥,김정아,나현희,황동희,이홍기 仁濟大學校 白病院 2010 仁濟醫學 Vol.31 No.-

Aplastic anemia is one of the hematologic disease which is characterized by cytopenia in peripheral blood, hypocelluarity in bone marrow and marrow failure. Most common cause of aplastic anemia is unknown. Acquired causes of it are viral infection, drugs, and chemical agents. The symptoms of aplastic anemia are fatigue, headache, dizziness, exertional dyspnea, and pallor, and they are due to abrupt decrease in hemoglobin level. The incidence of acquired aplastic anemia is higher in Eastern population than Western. In geeral, men and women are affected with equal frequency, but the age distribution is biphasic, with the major peak in the teens and tweenties and a second rise in the elderly. We report a case of a 28-year-old man who experience aplastic anemia after ingestion of Cordyceps with the review of literatures.

Suppressive Effect of Fermented Angelica tenuissima Root Extract against Photoaging: Possible Involvement of Hemeoxygenase-1

( Yun-a Park ),( Sung Ryul Lee ),( Jin Woo Lee ),( Hyun Jung Koo ),( Seon-a Jang ),( Seung-won Yun ),( Hyun Ju Kim ),( Jeong Suk Woo ),( Myung Rye Park ),( Se Chan Kang ),( Youn Kyu Kim ),( Eun-hwa So 한국미생물생명공학회(구 한국산업미생물학회) 2018 Journal of microbiology and biotechnology Vol.28 No.8

Angelica tenuissima root has historically been used as a traditional medicine in Korea. Previous studies have identified the anti-melanogenic effects of the extract of A. tenuissima root fermented by Aspergillus oryzae (FAT). This study investigated the protective effects of FAT against ultraviolet light B exposure (UVB; 30 mJ/㎠) in HaCaT (human keratinocyte) or Hs68 (human foreskin fibroblast) skin cells. FAT treatment was able to stimulate wound healing rate at the basal condition. FAT also favored the maintenance and/or improvement of extracellular matrix impairment caused by UVB irradiation through: 1) upregulation of procollagen Type-1 synthesis and secretion; 2) suppression of MMP-1 and elastase expression. FAT was able to play a role in the attenuation of inflammatory responses caused by UVB irradiation via upregulation of photo-protective hemeoxygease-1 and suppression of proinflammatory cyclooxygenase-2 expression. After further verification of the anti-photoaging potential of FAT, it could be utilized as an effective ingredient in anti-aging and anti-wrinkle cosmetics.

<i>SlPMEI</i>, a pollen-specific gene in tomato

Kim, Woong Bom,Lim, Chan Ju,Jang, Hyun A.,Yi, So Young,Oh, Sang-Keun,Lee, Ha Yeon,Kim, Hyun A.,Park, Youn-Il,Kwon, Suk-Yoon Canadian Science Publishing 2014 Canadian journal of plant science. Revue canadienn Vol.94 No.1

<P> Kim, W. B., Lim, C. J., Jang, H. A., Yi, S. Y., Oh, S.-K., Lee, H. Y., Kim, H. A., Park, Y.-I. and Kwon, S.-Y. 2014. SlPMEI, a pollen-specific gene in tomato. Can. J. Plant Sci. 94: 73-83. Pectin is one of the main components of plant cell walls, and its biosynthesis is controlled by pectin methylesterase (PME). Pectin methylesterase inhibitors (PMEIs) are key regulators of PME. We report here the cloning and characterization of a novel Solanum lycopersicum L. PMEI gene, SlPMEI. RT-PCR studies of leaf, seed, fruit, flower, and flower organs confirmed that SlPMEI is expressed specifically in pollen. Promoter analysis of SlPMEI revealed pollen-specific cis-acting elements (pollen lat52 and g10). In addition, SlPMEI is expressed independently of abiotic stress, pathogen exposure, and growth stage in tomato, and a histochemical analysis of promoter activity revealed pollen-specific expression in both Arabidopsis and tomato. Under the microscope, we observed pollen-specific GUS expression in the stamen of transgenic tomato plant. These results indicate that the promoter of SlPMEI has strong pollen-specific activity, and could therefore be useful for development of industrially and agronomically important transgenic plants. </P>

간호실무에서 신봉이론(Espoused theories)에 대한 탐색적 연구

서문자,김혜숙,이은희,박영숙,조경숙,강현숙,임난영,김주현,이소우,조복희,이명하,지성애,하양숙,손영희,권성복,김희진,추진아 성인간호학회 2001 성인간호학회지 Vol.13 No.1

As a nursing practice involves nurses' actions in a specific context of health care, this study has focused on exploring the espoused theories in nursing practice within the action science perspectives, Espoused theories are the belief, principles, and rationale expressed by the practitioner as guiding her/his actions in a situation of practice. The data were analysed qualitatively and 25 elements of espoused theories of nursing action were identified and clustered into 6 categories. The 25 elements of espoused theories are as follows: The clinical nurse worked in wholistic and individual nursing, focussed on the patient's needed, comfort and supportive nursing (5 theories of nursing goal) ; excellent skills, knowledge based, assessment and data collection, explaining, educating or a scientific basis(6 theories of nursing intervention): advocacy, value oriented, treatment, account- ability and commitment(4 theories of nursing ethics) ; human respect. partnership, trust(3 theories of patient-nurse relationship) : knowledgable, accumulated clinical experiences and personally lived experiences. positive perspectives(4 theories of nurse), role of intervention. rewarding peer relationship(3 theories of situations) The above mentioned espoused theories are similar to that of nursing textbooks which students learned through basic nursing education and almost the same as the Acts ofa Nurse in Korean. However, we are doubtful whether nurses actually do as they think. Therefore. it is recommended to review the theories-in-use in order to and any discrepancies between the espoused theories and the reality of nursing actions

Perspectives of Integrative Cancer Genomics in Next Generation Sequencing Era

Kwon, So-Mee,Cho, Hyun-Woo,Choi, Ji-Hye,Jee, Byul-A,Jo, Yun-A,Woo, Hyun-Goo Korea Genome Organization 2012 Genomics & informatics Vol.10 No.2

The explosive development of genomics technologies including microarrays and next generation sequencing (NGS) has provided comprehensive maps of cancer genomes, including the expression of mRNAs and microRNAs, DNA copy numbers, sequence variations, and epigenetic changes. These genome-wide profiles of the genetic aberrations could reveal the candidates for diagnostic and/or prognostic biomarkers as well as mechanistic insights into tumor development and progression. Recent efforts to establish the huge cancer genome compendium and integrative omics analyses, so-called "integromics", have extended our understanding on the cancer genome, showing its daunting complexity and heterogeneity. However, the challenges of the structured integration, sharing, and interpretation of the big omics data still remain to be resolved. Here, we review several issues raised in cancer omics data analysis, including NGS, focusing particularly on the study design and analysis strategies. This might be helpful to understand the current trends and strategies of the rapidly evolving cancer genomics research.