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https://www.readbyqxmd.com/read/28710456/genomic-insights-into-the-virulence-and-salt-tolerance-of-staphylococcus-equorum
#1
Do-Won Jeong, Sojeong Heo, Sangryeol Ryu, Jochen Blom, Jong-Hoon Lee
To shed light on the genetic background behind the virulence and salt tolerance of Staphylococcus equorum, we performed comparative genome analysis of six S. equorum strains. Data on four previously published genome sequences were obtained from the NCBI database, while those on strain KM1031 displaying resistance to multiple antibiotics and strain C2014 causing haemolysis were determined in this study. Examination of the pan-genome of five of the six S. equorum strains showed that the conserved core genome retained the genes for general physiological processes and survival of the species...
July 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28651299/survival-estimates-after-stopping-sorafenib-in-patients-with-hepatocellular-carcinoma-next-score-development-and-validation
#2
Hye Won Lee, Hyun Soo Kim, Seung Up Kim, Do Young Kim, Beom Kyung Kim, Jun Yong Park, Sang Hoon Ahn, Mi Young Jeon, Ja Yoon Heo, Soo Young Park, Yu Rim Lee, Sun Kyung Jang, Su Hyun Lee, Se Young Jang, Won Young Tak, Kwang-Hyub Han
Background/Aims: Limited information is available regarding patient survival after sorafenib discontinuation in patients with hepatocellular carcinoma (HCC). Thus, we developed and validated a novel survival prediction model. Methods: Clinical data from 409 patients with HCC who stopped taking sorafenib between September 2008 and February 2015 were reviewed. Results: In the training cohort, four factors were independent negative predictors of survival (p<0...
June 27, 2017: Gut and Liver
https://www.readbyqxmd.com/read/28646204/optogenetic-protein-clustering-through-fluorescent-protein-tagging-and-extension-of-cry2
#3
Hyerim Park, Na Yeon Kim, Sangkyu Lee, Nury Kim, Jihoon Kim, Won Do Heo
Protein homo-oligomerization is an important molecular mechanism in many biological processes. Therefore, the ability to control protein homo-oligomerization allows the manipulation and interrogation of numerous cellular events. To achieve this, cryptochrome 2 (CRY2) from Arabidopsis thaliana has been recently utilized for blue light-dependent spatiotemporal control of protein homo-oligomerization. However, limited knowledge on molecular characteristics of CRY2 obscures its widespread applications. Here, we identify important determinants for efficient cryptochrome 2 clustering and introduce a new CRY2 module, named ''CRY2clust'', to induce rapid and efficient homo-oligomerization of target proteins by employing diverse fluorescent proteins and an extremely short peptide...
June 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28614215/effects-of-branched-chain-amino-acids-bcaas-on-the-progression-of-advanced-liver-disease-a-korean-nationwide-multicenter-retrospective-observational-cohort-study
#4
MULTICENTER STUDY
Jung Gil Park, Won Young Tak, Soo Young Park, Young Oh Kweon, Se Young Jang, Yu Rim Lee, Si Hyun Bae, Jae Young Jang, Do Young Kim, June Sung Lee, Ki Tae Suk, In Hee Kim, Heon Ju Lee, Woo Jin Chung, Byoung Kuk Jang, Jeong Ill Suh, Jeong Heo, Won Kee Lee
Evidence of the potential benefits of long-term oral branched-chain amino acid (BCAA) supplementation in reducing the severity of liver disease is limited.Patients who were diagnosed with liver cirrhosis with a Child-Pugh (CP) score of 8-10 were included. The BCAA group consumed BCAAs daily for at least 6 months, and the control group consumed a diet without BCAA. We analyzed the improvements based on the model for end-stage liver disease (MELD) score, CP score, incidence of cirrhosis-related complications, and event-free survival over 2 years...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28584943/compartment-syndrome-after-embolization-of-arteriovenous-malformation
#5
Kyoung Won Yoon, Seon-Hee Heo, Dongho Hyun, Kwang Bo Park, Young Soo Do, Dong-Ik Kim
Management of arteriovenous malformations (AVMs) remains challenging because of their unpredictable course and high morbidity rate. In this case report, we present a patient with a huge AVM on the right calf who suffered complications of compartment syndrome, rhabdomyolysis, skin necrosis, and nerve damage after sclerotherapy. Limb salvage was achieved in spite of these devastating complications. A multidisciplinary team approach is important especially when making decisions for the management of a complicated AVM...
June 5, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28480664/clinical-and-genetic-features-of-coxiella-burnetii-in-a-patient-with-an-acute-febrile-illness-in-korea
#6
Seung Hun Lee, Jung Yeon Heo, Hae Kyung Lee, Yeong Seon Lee, Hye Won Jeong, Seon Do Hwang
Although Q fever is an important zoonotic infection with a worldwide distribution, no human isolates of Coxiella burnetii have been identified in Korea. For the first time, we identified the nucleotide sequence of C. burnetii from a 32-year-old man with an acute febrile illness in Korea. Diagnosis of acute Q fever was confirmed by seroconversion using indirect immunofluorescence antibody assays. Phylogenetic analysis demonstrated high sequence similarity (99.6%-100%) with C. burnetii 16S rRNA sequences identified from the reservoir...
June 2017: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/28406187/cell-matrix-adhesion-and-cell-cell-adhesion-differentially-control-basal-myosin-oscillation-and-drosophila-egg-chamber-elongation
#7
Xiang Qin, Byung Ouk Park, Jiaying Liu, Bing Chen, Valerie Choesmel-Cadamuro, Karine Belguise, Won Do Heo, Xiaobo Wang
Pulsatile actomyosin contractility, important in tissue morphogenesis, has been studied mainly in apical but less in basal domains. Basal myosin oscillation underlying egg chamber elongation is regulated by both cell-matrix and cell-cell adhesions. However, the mechanism by which these two adhesions govern basal myosin oscillation and tissue elongation is unknown. Here we demonstrate that cell-matrix adhesion positively regulates basal junctional Rho1 activity and medio-basal ROCK and myosin activities, thus strongly controlling tissue elongation...
April 13, 2017: Nature Communications
https://www.readbyqxmd.com/read/28393188/a-heptameric-peptide-purified-from-spirulina%C3%A2-sp-gastrointestinal-hydrolysate-inhibits-angiotensin-i-converting-enzyme-and-angiotensin%C3%A2-ii-induced-vascular-dysfunction-in-human-endothelial-cells
#8
Seong-Yeong Heo, Seok-Chun Ko, Chang Su Kim, Gun-Woo Oh, Bomi Ryu, Zhong-Ji Qian, Geunhyung Kim, Won Sun Park, Il-Whan Choi, Thi Tuong Vy Phan, Soo-Jin Heo, Do-Hyung Kang, Myunggi Yi, Won-Kyo Jung
In this study, a marine microalga Spirulina sp.-derived protein was hydrolyzed using gastrointestinal enzymes to produce an angiotensin I (Ang I)-converting enzyme (ACE) inhibitory peptide. Following consecutive purification, the potent ACE inhibitory peptide was composed of 7 amino acids, Thr-Met‑Glu‑Pro‑Gly‑Lys-Pro (molecular weight, 759 Da). Analysis using the Lineweaver-Burk plot and molecular modeling suggested that the purified peptide acted as a mixed non-competitive inhibitor of ACE...
May 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28392549/korean-cancer-patients-awareness-of-clinical-trials-perceptions-on-the-benefit-and-willingness-to-participate
#9
Yoojoo Lim, Jee Min Lim, Won Jae Jeong, Kyung-Hun Lee, Bhumsuk Keam, Tae-Yong Kim, Tae Min Kim, Sae-Won Han, Do Youn Oh, Dong-Wan Kim, Tae-You Kim, Dae Seog Heo, Yung-Jue Bang, Seock-Ah Im
Purpose: To assess current levels of awareness of clinical trials (CTs), perceptions regarding their benefits and willingness to participate to CTs among Korean cancer patients. Materials and Methods: From December 2012 to August 2015, we distributed questionnaires to cancer patients receiving systemic anti-cancer therapy at Seoul National University Hospital, Seoul, Korea. Results: A total of 397 out of 520 requested patients (76.3%) responded to the survey...
April 7, 2017: Cancer Research and Treatment: Official Journal of Korean Cancer Association
https://www.readbyqxmd.com/read/28224351/subcirrhotic-liver-stiffness-by-fibroscan-correlates-with-lower-risk-of-hepatocellular-carcinoma-in-patients-with-hbv-related-cirrhosis
#10
Mi Young Jeon, Hye Won Lee, Seung Up Kim, Ja Yoon Heo, Sojung Han, Beom Kyung Kim, Jun Yong Park, Do Young Kim, Sang Hoon Ahn, Kwang-Hyub Han
BACKGROUND AND AIMS: The risk of developing hepatocellular carcinoma (HCC) varies, even in the context of cirrhosis. We investigated the relationship between liver stiffness (LS) in subcirrhotic range, assessed via transient elastography (TE), and risk of HCC development in patients with chronic hepatitis B (CHB)-related cirrhosis. METHODS: Data on 540 patients presenting with clinically evident CHB-related cirrhosis between April 2006 and December 2014 were reviewed retrospectively...
May 2017: Hepatology International
https://www.readbyqxmd.com/read/28012485/efficacy-of-early-administration-of-escitalopram-on-depressive-and-emotional-symptoms-and-neurological-dysfunction-after-stroke-a-multicentre-double-blind-randomised-placebo-controlled-study
#11
Jong S Kim, Eun-Jae Lee, Dae-Il Chang, Jong-Ho Park, Seong Hwan Ahn, Jae-Kwan Cha, Ji Hoe Heo, Sung-Il Sohn, Byung-Chul Lee, Dong-Eog Kim, Hahn Young Kim, Seongheon Kim, Do-Young Kwon, Jei Kim, Woo-Keun Seo, Jun Lee, Sang-Won Park, Seong-Ho Koh, Jin Young Kim, Smi Choi-Kwon
BACKGROUND: Mood and emotional disturbances are common in patients with stroke, and adversely affect the clinical outcome. We aimed to evaluate the efficacy of early administration of escitalopram to reduce moderate or severe depressive symptoms and improve emotional and neurological dysfunction in patients with stroke. METHODS: This was a placebo controlled, double-blind trial done at 17 centres in South Korea. Patients who had had an acute stroke within the past 21 days were randomly assigned in a 1:1 ratio to receive oral escitalopram (10 mg/day) or placebo for 3 months...
January 2017: Lancet Psychiatry
https://www.readbyqxmd.com/read/27889172/safety-assessment-of-tetragenococcus-halophilus-isolates-from-doenjang-a-korean-high-salt-fermented-soybean-paste
#12
Do-Won Jeong, Sojeong Heo, Jong-Hoon Lee
We assessed the safety of 49 Tetragenococcus halophilus strains isolated from doenjang in Korea. Minimum inhibitory concentration assays showed that all strains can be considered as susceptible to ampicillin, erythromycin, penicillin G, tetracycline, and vancomycin, but resistant to ciprofloxacin based on the Enterococcus breakpoint values provided by the European Committee on Antimicrobial Susceptibility testing in 2015. Ciprofloxacin resistance was sufficiently high to consider the potential for acquisition of transmissible determinants...
April 2017: Food Microbiology
https://www.readbyqxmd.com/read/27555588/plekhg3-enhances-polarized-cell-migration-by-activating-actin-filaments-at-the-cell-front
#13
Trang Thi Thu Nguyen, Wei Sun Park, Byung Ouk Park, Cha Yeon Kim, Yohan Oh, Jin Man Kim, Hana Choi, Taeyoon Kyung, Cheol-Hee Kim, Gabsang Lee, Klaus M Hahn, Tobias Meyer, Won Do Heo
Cells migrate by directing Ras-related C3 botulinum toxin substrate 1 (Rac1) and cell division control protein 42 (Cdc42) activities and by polymerizing actin toward the leading edge of the cell. Previous studies have proposed that this polarization process requires a local positive feedback in the leading edge involving Rac small GTPase and actin polymerization with PI3K likely playing a coordinating role. Here, we show that the pleckstrin homology and RhoGEF domain containing G3 (PLEKHG3) is a PI3K-regulated Rho guanine nucleotide exchange factor (RhoGEF) for Rac1 and Cdc42 that selectively binds to newly polymerized actin at the leading edge of migrating fibroblasts...
September 6, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27447450/exosome-engineering-for-efficient-intracellular-delivery-of-soluble-proteins-using-optically-reversible-protein-protein-interaction-module
#14
Nambin Yim, Seung-Wook Ryu, Kyungsun Choi, Kwang Ryeol Lee, Seunghee Lee, Hojun Choi, Jeongjin Kim, Mohammed R Shaker, Woong Sun, Ji-Ho Park, Daesoo Kim, Won Do Heo, Chulhee Choi
Nanoparticle-mediated delivery of functional macromolecules is a promising method for treating a variety of human diseases. Among nanoparticles, cell-derived exosomes have recently been highlighted as a new therapeutic strategy for the in vivo delivery of nucleotides and chemical drugs. Here we describe a new tool for intracellular delivery of target proteins, named 'exosomes for protein loading via optically reversible protein-protein interactions' (EXPLORs). By integrating a reversible protein-protein interaction module controlled by blue light with the endogenous process of exosome biogenesis, we are able to successfully load cargo proteins into newly generated exosomes...
July 22, 2016: Nature Communications
https://www.readbyqxmd.com/read/27439777/caloric-restriction-of-db-db-mice-reverts-hepatic-steatosis-and-body-weight-with-divergent-hepatic-metabolism
#15
Kyung Eun Kim, Youngae Jung, Soonki Min, Miso Nam, Rok Won Heo, Byeong Tak Jeon, Dae Hyun Song, Chin-Ok Yi, Eun Ae Jeong, Hwajin Kim, Jeonghyun Kim, Seon-Yong Jeong, Woori Kwak, Do Hyun Ryu, Tamas L Horvath, Gu Seob Roh, Geum-Sook Hwang
Non-alcoholic fatty liver disease (NAFLD) is one of the most frequent causes of liver disease and its prevalence is a serious and growing clinical problem. Caloric restriction (CR) is commonly recommended for improvement of obesity-related diseases such as NAFLD. However, the effects of CR on hepatic metabolism remain unknown. We investigated the effects of CR on metabolic dysfunction in the liver of obese diabetic db/db mice. We found that CR of db/db mice reverted insulin resistance, hepatic steatosis, body weight and adiposity to those of db/m mice...
July 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27333235/fluocinolone-acetonide-implant-for-vogt-koyanagi-harada-disease-three-year-outcomes-of-efficacy-and-safety
#16
RANDOMIZED CONTROLLED TRIAL
Jang Won Heo, Bum-Joo Cho, Debra A Goldstein, Yasir J Sepah, Diana V Do, Quan Dong Nguyen
PURPOSE: To investigate the efficacy and safety of fluocinolone acetonide intravitreal implant in patients with Vogt-Koyanagi-Harada disease. METHODS: A post hoc, subgroup analysis on patients with Vogt-Koyanagi-Harada was performed using data sets from two multicenter randomized trials on fluocinolone acetonide implant. Each subject received fluocinolone acetonide implantation in one eye and standard-of-care treatment in the fellow eye and was followed for 3 years...
November 2016: Retina
https://www.readbyqxmd.com/read/27272116/effect-of-yttrium-90-radioembolization-on-outcomes-in-asian-patients-with-early-to-advanced-stage-hepatocellular-carcinoma
#17
Hyun Young Woo, Do Young Kim, Jeong Heo, Chang Won Kim, Suk Kim, Ki Tae Yoon, Won Lim, Young Mi Hong, Jong Yun Won, Sangheun Lee, Kwang Hyub Han, Mong Cho
AIM: The aim of this study was to investigate the effect of yttrium-90 radioembolization on the outcome of Asian patients with early to advanced stage hepatocellular carcinoma (HCC). METHODS: Sixty-two patients were screened and 50 patients (80.6%) were eligible. Response was evaluated using the Response Evaluation Criteria in Solid Tumors (RECIST), and overall survival was estimated using the Kaplan-Meier method. RESULTS: The Barcelona Clinic Liver Cancer (BCLC) stage was A in 40% of patients, B in 24%, and C in 36%; 66% of patients had hepatitis B virus infections...
April 2017: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/27226379/release-of-infectious-hepatitis-c-virus-from-huh7-cells-occurs-via-a-trans-golgi-network-to-endosome-pathway-independent-of-very-low-density-lipoprotein-secretion
#18
Jamel Mankouri, Cheryl Walter, Hazel Stewart, Matthew Bentham, Wei Sun Park, Won Do Heo, Mitsunori Fukuda, Stephen Griffin, Mark Harris
UNLABELLED: The release of infectious hepatitis C virus (HCV) particles from infected cells remains poorly characterized. We previously demonstrated that virus release is dependent on the endosomal sorting complex required for transport (ESCRT). Here, we show a critical role of trans-Golgi network (TGN)-endosome trafficking during the assembly, but principally the secretion, of infectious virus. This was demonstrated by both small interfering RNA (siRNA)-mediated silencing of TGN-associated adaptor proteins and a panel of dominant negative (DN) Rab GTPases involved in TGN-endosome trafficking steps...
August 15, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27190091/optogenetic-toolkit-reveals-the-role-of-ca2-sparklets-in-coordinated-cell-migration
#19
Jin Man Kim, Minji Lee, Nury Kim, Won Do Heo
Cell migration is controlled by various Ca(2+) signals. Local Ca(2+) signals, in particular, have been identified as versatile modulators of cell migration because of their spatiotemporal diversity. However, little is known about how local Ca(2+) signals coordinate between the front and rear regions in directionally migrating cells. Here, we elucidate the spatial role of local Ca(2+) signals in directed cell migration through combinatorial application of an optogenetic toolkit. An optically guided cell migration approach revealed the existence of Ca(2+) sparklets mediated by L-type voltage-dependent Ca(2+) channels in the rear part of migrating cells...
May 24, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27189291/roux-en-y-gastric-bypass-vs-sleeve-gastrectomy-vs-gastric-banding-the-first-multicenter-retrospective-comparative-cohort-study-in-obese-korean-patients
#20
MULTICENTER STUDY
Sang Kuon Lee, Yoonseok Heo, Joong Min Park, Yong Jin Kim, Seong Min Kim, Do Joong Park, Sang Moon Han, Kyung Won Shim, Yeon Ji Lee, Ja Youn Lee, Jin Won Kwon
PURPOSE: Bariatric surgery is relatively new in Korea, and studies comparing different bariatric procedures in Koreans are lacking. This study aimed to compare the clinical outcomes of laparoscopic adjustable gastric banding (LAGB), Roux-en-Y gastric bypass (RYGB), and sleeve gastrectomy (SG) for treating morbidly obese Korean adults. MATERIALS AND METHODS: In this multicenter retrospective cohort study, we reviewed the medical records of 261 obese patients who underwent different bariatric procedures...
July 2016: Yonsei Medical Journal
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