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Paek HJ, Oh HJ, Hove T. Differential effects of digital media platforms on climate change risk information-sharing intention: A moderated mediation model. Risk Anal 2024. [PMID: 38218627 DOI: 10.1111/risa.14270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Revised: 09/10/2023] [Accepted: 12/22/2023] [Indexed: 01/15/2024]
Abstract
This study analyzes the mechanisms through which risk messages about climate change lead to people's risk information-sharing intention, and how digital media platform type serves as a context that moderates those mechanisms. Our analysis is informed by the influence of presumed influence (IPI) model, and we adapt and expand that model in three ways. First, we apply the concept of perceived media reach to the context of digital media platforms, specifically news aggregators and social networking sites. Second, we integrate the two mediators of risk perception and presumed influence. Third, we examine potential moderating roles of digital media platforms in the IPI model. An online survey was conducted among 1000 South Korean adults, and a moderated mediation model (PROCESS Macro Model 59) generated the following results. (1) Perceived media reach was positively related to both mediators-risk perception and presumed influence. (2) By way of those two mediators, perceived reach significantly led to information-sharing intention. (3) Presumed influence, but not risk perception, was significantly related to information-sharing intention. (4) Digital media platforms moderated the relation between perceived reach and risk perception: the role of content-related risk perception was more pronounced in news aggregators, while the role of context-related presumed influence was greater in social networking sites. Theoretical and practical implications for risk communication are discussed.
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Affiliation(s)
- Hye-Jin Paek
- Department of Advertising & Public Relations, Hanyang University, Ansan, South Korea
| | - Hyun Jung Oh
- Department of Advertising & Public Relations, Hanyang University, Ansan, South Korea
| | - Thomas Hove
- Department of Advertising & Public Relations, Hanyang University, Ansan, South Korea
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Oh HJ, Choi MY. The Role of Social Presence in Relationships Among Gender Stereotypes, Sexism, and In-Game Sexual Harassment Among Young Korean Gamers. Cyberpsychol Behav Soc Netw 2023. [PMID: 37222760 DOI: 10.1089/cyber.2022.0265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Despite the rapidly increasing number of female gamers worldwide, female players are still experiencing discrimination, stereotyping, and objectification in digital games. The present study examined the relationships among gender stereotypes, sexism, and sexual harassment in online games, and further investigated how enhanced social presence contributes to intensifying the effects of gender stereotypes and sexism on sexual harassment. An online survey was conducted among 521 young male Korean gamers who regularly play two genres of online games: role-playing games and first-person shooter games. The results of moderated-mediation analyses using Hayes PROCESS macro models confirmed that gender stereotypes had significant effects on hostile and benevolent in-game sexism. A significant interaction was also observed between in-game sexism and social presence in predicting sexual harassment in online games. The findings from this study confirm the role of social presence as an amplifier that reinforces gender stereotypes and discrimination in competitive and violent online game environments.
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Affiliation(s)
- Hyun Jung Oh
- Department of Advertising and Public Relations, Hanyang University (ERICA), Ansan, Republic of Korea
| | - Mi Yeon Choi
- Department of Advertising and Public Relations, Hanyang University (ERICA), Ansan, Republic of Korea
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Lee J, Kim JE, Lee S, Lee TK, Kim IH, Yoon SH, Yoo M, Lee E, Hwang DY, Kang SH, Ku BS, Lee DW, Park YS, K JW, Kim JW, Ahn SH, Lee KW, Kim HH, Oh HJ, Suh YS. Abstract 5322: High throughput chemotherapeutic drug screening system for gastric cancer: cure-GA. Cancer Res 2023. [DOI: 10.1158/1538-7445.am2023-5322] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
Abstract
To discover clinically applicable anticancer drugs and predict therapeutic response for advanced gastric cancer, we developed a high-throughput drug (HTD) screening system that could rapidly evaluate drug reactivity using 3D cultured primary cells derived from gastric cancer (GC) patients. Primary cancer cells were isolated from fresh surgical specimens that resected from 143 GC patients using Gentle Max tissue dissociation system. Primary cells were mixed with Matrigel, and placed on a micropillar for three-dimensional (3D) culture. After the primary cells were stabilized in the complete culture medium (CCM) than added various chemotherapeutic drugs containing 5-FU, Oxaliplatin, and Paclitaxel in CCM and incubated for 7 days. Cell viability was determined through calcein staining and quantified scanned images. The IC50 for each drug was calculated by a sigmoidal dose-response curve, using the GraphPad Prism 9 program. The average weight of gastric cancer tissue used in the experiment was 300 mg (75 mg ~ 1930 mg), and the average number of dissociated viable cells for each tissue was 3.9 × 10^6 cells/case. About 2.4 × 10^5 live cell was required per drug, we were able to obtain an average of 6.4 (Min.2, Max 14) drug reactivity data per tissue using the HTD screening system. GC tissues obtained from the operating room were dissociated within 16 hours and then loaded into the HTS system within 3 hours. Cells were stabilized for 1 day in 3D culture plate and exposed to the drug for 7 days, and then data reports were made within 3 days. As a result, it was possible to obtain within 14 days from fresh surgical GC tissue to drug response data. Additionally, we confirmed that 3D cultured primary cells derived from GC tissues consistently preserved primary characters using IHC. Similar to their parental cancer tissue, GC 3D cultured primary cells derived from adenocarcinoma large glandular patterns and retain the expression of some marker proteins. In this study, we evaluated the drug response data for 101 cases (success rate 71%; 101/143) to 5-FU, Oxaliplatin, and Palitaxel, etc. using the HTD screening system and it was confirmed that individual patient had a difference response to each drug. Here we established the HTD screening system using 3D cultured GC patient derived primary cells. The advantages of this system were that it is the first model system that directly used patient-derived primary cells for drug screening, and it can rapidly evaluate drug reactivity to various anticancer drugs within 10 days. The HTD screening system based on patient-derived primary cells can provide that information to predict drug response and allow for finding more appropriate therapy for each patient.
Citation Format: Jieun Lee, Jung Eun Kim, Sanjun Lee, Tae-Kyeong Lee, In Hee Kim, So Hee Yoon, Mira Yoo, Eunju Lee, Doo-Young Hwang, So Hyun Kang, Bo Sung Ku, Dong Woo Lee, Young Suk Park, Ji-Won K, Jin Won Kim, Sang-Hoon Ahn, Keun-Wook Lee, Hyung-Ho Kim, Hyun Jung Oh, Yun-Suhk Suh. High throughput chemotherapeutic drug screening system for gastric cancer: cure-GA. [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 5322.
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Affiliation(s)
- Jieun Lee
- 1Seoul National University Bundang Hospital, Gyeonggi-do, Republic of Korea
| | - Jung Eun Kim
- 2Medical & Bio Decision (MBD Co., Ltd.), Gyeonggi-do, Republic of Korea
| | - Sanjun Lee
- 3Kyung Hee University Hospital at Gangdong, Seoul, Republic of Korea
| | - Tae-Kyeong Lee
- 1Seoul National University Bundang Hospital, Gyeonggi-do, Republic of Korea
| | - In Hee Kim
- 2Medical & Bio Decision (MBD Co., Ltd.), Gyeonggi-do, Republic of Korea
| | - So Hee Yoon
- 2Medical & Bio Decision (MBD Co., Ltd.), Gyeonggi-do, Republic of Korea
| | - Mira Yoo
- 1Seoul National University Bundang Hospital, Gyeonggi-do, Republic of Korea
| | - Eunju Lee
- 1Seoul National University Bundang Hospital, Gyeonggi-do, Republic of Korea
| | - Doo-Young Hwang
- 1Seoul National University Bundang Hospital, Gyeonggi-do, Republic of Korea
| | - So Hyun Kang
- 1Seoul National University Bundang Hospital, Gyeonggi-do, Republic of Korea
| | - Bo Sung Ku
- 2Medical & Bio Decision (MBD Co., Ltd.), Gyeonggi-do, Republic of Korea
| | - Dong Woo Lee
- 2Medical & Bio Decision (MBD Co., Ltd.), Gyeonggi-do, Republic of Korea
| | - Young Suk Park
- 1Seoul National University Bundang Hospital, Gyeonggi-do, Republic of Korea
| | - Ji-Won K
- 1Seoul National University Bundang Hospital, Gyeonggi-do, Republic of Korea
| | - Jin Won Kim
- 1Seoul National University Bundang Hospital, Gyeonggi-do, Republic of Korea
| | - Sang-Hoon Ahn
- 1Seoul National University Bundang Hospital, Gyeonggi-do, Republic of Korea
| | - Keun-Wook Lee
- 1Seoul National University Bundang Hospital, Gyeonggi-do, Republic of Korea
| | - Hyung-Ho Kim
- 1Seoul National University Bundang Hospital, Gyeonggi-do, Republic of Korea
| | - Hyun Jung Oh
- 1Seoul National University Bundang Hospital, Gyeonggi-do, Republic of Korea
| | - Yun-Suhk Suh
- 1Seoul National University Bundang Hospital, Gyeonggi-do, Republic of Korea
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Oh HJ, Kim J, Chang JJ, Park N, Sangrock L. Social Benefits of Living in the metaverse: The relationships among social presence, supportive interaction, social self-efficacy, and feelings of loneliness. Computers in Human Behavior 2022. [DOI: 10.1016/j.chb.2022.107498] [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: 10/14/2022]
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Oh HJ, Aguilar R, Kesner B, Lee HG, Kriz AJ, Chu HP, Lee JT. Jpx RNA regulates CTCF anchor site selection and formation of chromosome loops. Cell 2021; 184:6157-6173.e24. [PMID: 34856126 DOI: 10.1016/j.cell.2021.11.012] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 09/22/2021] [Accepted: 11/09/2021] [Indexed: 01/24/2023]
Abstract
Chromosome loops shift dynamically during development, homeostasis, and disease. CCCTC-binding factor (CTCF) is known to anchor loops and construct 3D genomes, but how anchor sites are selected is not yet understood. Here, we unveil Jpx RNA as a determinant of anchor selectivity. Jpx RNA targets thousands of genomic sites, preferentially binding promoters of active genes. Depleting Jpx RNA causes ectopic CTCF binding, massive shifts in chromosome looping, and downregulation of >700 Jpx target genes. Without Jpx, thousands of lost loops are replaced by de novo loops anchored by ectopic CTCF sites. Although Jpx controls CTCF binding on a genome-wide basis, it acts selectively at the subset of developmentally sensitive CTCF sites. Specifically, Jpx targets low-affinity CTCF motifs and displaces CTCF protein through competitive inhibition. We conclude that Jpx acts as a CTCF release factor and shapes the 3D genome by regulating anchor site usage.
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Affiliation(s)
- Hyun Jung Oh
- Department of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Genetics, Harvard Medical School, Boston, MA 02114, USA
| | - Rodrigo Aguilar
- Department of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Genetics, Harvard Medical School, Boston, MA 02114, USA
| | - Barry Kesner
- Department of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Genetics, Harvard Medical School, Boston, MA 02114, USA
| | - Hun-Goo Lee
- Department of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Genetics, Harvard Medical School, Boston, MA 02114, USA
| | - Andrea J Kriz
- Department of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Genetics, Harvard Medical School, Boston, MA 02114, USA
| | - Hsueh-Ping Chu
- Department of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Genetics, Harvard Medical School, Boston, MA 02114, USA
| | - Jeannie T Lee
- Department of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Genetics, Harvard Medical School, Boston, MA 02114, USA.
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Kwon YE, Choi HY, Oh HJ, Ahn SY, Ryu DR, Kwon YJ. Vertebral fracture is associated with myocardial infarction in incident hemodialysis patients: a Korean nationwide population-based study. Osteoporos Int 2020; 31:1965-1973. [PMID: 32394062 DOI: 10.1007/s00198-020-05423-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 04/14/2020] [Indexed: 10/24/2022]
Abstract
UNLABELLED Chronic kidney disease (CKD)-mineral and bone disorder suggests that fragile bone and vascular disorder might be connected closely in CKD patients. In this study, fracture event was significantly associated with myocardial infarction (MI) in end-stage renal disease patients on hemodialysis (HD), especially for vertebral fractures. INTRODUCTION CKD-mineral and bone disorder is characterized by biochemical abnormalities, bone disorders, and vascular calcification. We aimed to verify the association between fracture and MI in CKD patients. METHODS Records for incident CKD stage 3 to 5 patients and patients who initiated HD between July 2014 and June 2018 were retrieved from the Korean Health Insurance Review & Assessment Service Database. Fractures were defined using diagnostic codes and were classified into vertebral, femoral, and other site fractures. MI was defined using a combination of MI diagnostic codes and related procedure codes. Multiple logistic regressions and 1:1 propensity score matching analysis were conducted. RESULTS A total of 38,935 patients (HD, 11,379; pre-dialysis CKD, 27,556) were included in this study. A total of 5,057 (13.0%) patients experienced fracture, and 1,431 (3.7%) patients had MI. Multiple logistic regression analysis showed that fracture was significantly associated with MI in the HD group (odds ratio (OR) 1.34, P = 0.024), but not in the pre-dialysis CKD group (OR 1.04, P = 0.701). After propensity score matching for age, gender, and diabetes mellitus between patients with and without fracture, fracture still significantly correlated with MI in HD patients (OR 1.47, P = 0.034) but not in patients with pre-dialysis CKD (OR 1.04, P = 0.751). Subgroup analysis by fracture site found that vertebral fracture was associated with MI in HD patients (OR 2.11, P = 0.024), but femoral or other site fractures were not. CONCLUSION In HD patients, fracture was significantly associated with MI, especially for vertebral fractures patients.
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Affiliation(s)
- Y E Kwon
- Department of Internal Medicine, Hanyang University College of Medicine, Myongji Hospital, Goyang-si, South Korea
| | - H Y Choi
- The Korean Society of Nephrology, Seoul, South Korea
| | - H J Oh
- Ewha Institute of Convergence Medicine and Research Institute for Human Health Information, Ewha Womans University, Seoul, South Korea
| | - S Y Ahn
- Department of Internal Medicine, Korea University College of Medicine, Seoul, South Korea
| | - D-R Ryu
- Department of Internal Medicine, Ewha Womans University College of Medicine, Seoul, South Korea.
| | - Y J Kwon
- Department of Internal Medicine, Korea University College of Medicine, Seoul, South Korea.
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Aeby E, Lee HG, Lee YW, Kriz A, del Rosario BC, Oh HJ, Boukhali M, Haas W, Lee JT. Decapping enzyme 1A breaks X-chromosome symmetry by controlling Tsix elongation and RNA turnover. Nat Cell Biol 2020; 22:1116-1129. [PMID: 32807903 DOI: 10.1038/s41556-020-0558-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 07/09/2020] [Indexed: 12/27/2022]
Abstract
How allelic asymmetry is generated remains a major unsolved problem in epigenetics. Here we model the problem using X-chromosome inactivation by developing "BioRBP", an enzymatic RNA-proteomic method that enables probing of low-abundance interactions and an allelic RNA-depletion and -tagging system. We identify messenger RNA-decapping enzyme 1A (DCP1A) as a key regulator of Tsix, a noncoding RNA implicated in allelic choice through X-chromosome pairing. DCP1A controls Tsix half-life and transcription elongation. Depleting DCP1A causes accumulation of X-X pairs and perturbs the transition to monoallelic Tsix expression required for Xist upregulation. While ablating DCP1A causes hyperpairing, forcing Tsix degradation resolves pairing and enables Xist upregulation. We link pairing to allelic partitioning of CCCTC-binding factor (CTCF) and show that tethering DCP1A to one Tsix allele is sufficient to drive monoallelic Xist expression. Thus, DCP1A flips a bistable switch for the mutually exclusive determination of active and inactive Xs.
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Oh HJ, Yoon BH, Ha YC, Suh DC, Lee SM, Koo KH, Lee YK. The change of bone mineral density and bone metabolism after gastrectomy for gastric cancer: a meta-analysis. Osteoporos Int 2020; 31:267-275. [PMID: 31776636 DOI: 10.1007/s00198-019-05220-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 11/01/2019] [Indexed: 12/24/2022]
Abstract
UNLABELLED Bone mineral density (BMD) is significantly decreased after gastrectomy in patients with gastric cancer. Calcium malabsorption, secondary hyperparathyroidism, and dominant bone resorption appear to contribute to bone loss in these patients. Patients should undergo early surveillance and nutritional or pharmacologic intensive interventions for bone health. PURPOSE Survivorship care, including bone health, has become an important issue in gastric cancer. We performed a meta-analysis of the available observational studies to determine whether and how osteoporosis risk is increased after gastrectomy in patients with gastric cancer. METHODS A total of 1204 patients (802 men) from 19 cohort studies were included. We evaluated the prevalence of osteoporosis in postgastrectomy patients, comparing the incidence according to the type of gastrectomy and sex. Additionally, we evaluated changes in bone mineral density (BMD) and bone metabolism-related markers pre- to postoperatively and between patients who underwent gastrectomy and matched controls. Proportion meta-analysis was performed and pooled odds ratios (ORs) were calculated. RESULTS The pooled incidence estimate was 36% [95% confidence interval (CI), 32-40]. The incidence of osteoporosis was significantly higher in women than in men (OR = 1.90, p < 0.001) but was similar between partial and total gastrectomy groups (OR = 0.983, p = 0.939). BMD was significantly decreased, and calcium, phosphorous, and parathyroid hormone levels were significantly increased in patients after gastrectomy compared to those before gastrectomy. BMD and calcium and 25OH-vitamin D levels were significantly decreased, and parathyroid hormone and 1,25OH-vitamin D levels were significantly increased in the gastrectomy group compared to that in the control group. CONCLUSION We found that BMD is significantly decreased after gastrectomy in patients with gastric cancer. Vitamin D deficiency and secondary hyperparathyroidism are suggested to be common mechanism underlying BMD impairment. After resection, patients should undergo long-term nutritional and bone health surveillance, in addition to their oncological follow-up.
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Affiliation(s)
- H J Oh
- Division of Gastroenterology, Department of Internal Medicine, Center for Cancer Prevention and Detection, National Cancer Center, Goyang-si, Republic of Korea
| | - B-H Yoon
- Department of Orthopaedic Surgery, Inje University College of Medicine, Seoul Paik Hospital, Seoul, Republic of Korea
| | - Y-C Ha
- Department of Orthopaedic Surgery, College of Medicine, Chung-Ang University, Seoul, Republic of Korea
| | - D-C Suh
- College of Pharmacy, Chung-Ang University, Seoul, Republic of Korea
| | - S-M Lee
- College of Pharmacy, Daegu Catholic University , 13-13 Hayang-ro, Hayang-eup, Gyeongsan-si,Gyeongbuk, 38430, Republic of Korea.
| | - K-H Koo
- Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, 166 Gumi-ro, Bundang-gu, Seongnam-si, 463-707, Republic of Korea
- Department of Orthopedic Surgery, Seoul National University College of Medicine, 166 Gumi-ro, Bundang-gu, Seongnam-si, 463-707, Republic of Korea
| | - Y-K Lee
- Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, 166 Gumi-ro, Bundang-gu, Seongnam-si, 463-707, Republic of Korea.
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Oh HJ, Lee JT. Long Noncoding RNA Functionality Beyond Sequence: The Jpx Model: Commentary on "Functional Conservation of lncRNA JPX Despite Sequence and Structural Divergence" by Karner et al. (2019). J Mol Biol 2020; 432:301-304. [PMID: 31892474 DOI: 10.1016/j.jmb.2019.11.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The mouse lncRNA Jpx has been shown as an essential regulator in X-chromosome inactivation (XCI). Jpx RNA activates Xist expression through its trans-acting ability to evict CTCF from Xist promoter. Karner et al. (2019) reveals the intriguing finding that human JPX and mouse Jpx are functionally conserved although they have low similarity in the primary sequence and the secondary structure. This study provides an excellent model for studying lncRNA's evolution and epigenetic function.
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Affiliation(s)
- Hyun Jung Oh
- Department of Molecular Biology, Massachusetts General Hospital, Boston, MA, USA; Department of Genetics, Harvard Medical School, Boston, MA, USA
| | - Jeannie T Lee
- Department of Molecular Biology, Massachusetts General Hospital, Boston, MA, USA; Department of Genetics, Harvard Medical School, Boston, MA, USA.
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Abstract
Though controversial, water fluoridation has been hailed as one of the top-ten public-health achievements of the 20th century in the United States of America. In this article, we aim to investigate the public sense of water fluoridation as reflected on Twitter, using data from 2009 to 2017. To this end, tweets related to water fluoridation were collected using queries such as "fluoridated water or fluoride water," "water fluoridation or fluoridation of water," and hashtags related to water fluoridation. The collected tweets (n = 218,748) were examined through informetric, linguistic (word sentiment, word frequency, and word network analyses), and issue tweet analyses. We found that Twitter users who tweeted about water fluoridation in English between 2009 and 2017 constituted about <0.01% of all users including non-English users. In their tweets, words such as "poison" and "waste" were the strong negative sentiment words most often used. Of the top 30 words most frequently used, words related to information sources on water fluoridation and the safety of water fluoridation appeared more often than words related to its efficacy. Additionally, the words related to information sources on water fluoridation and the safety of water fluoridation were found to be core terms in the sentences of tweet mentions. Our linguistic analyses indicate that Twitter users responded sensitively to words that emphasize negative aspects of fluoridation. This is clearly shown in our issue tweet analysis, where tweet mentions expressing negative opinions about water fluoridation accounted for at least 59.2% of all mentions. By contrast, <15% of tweet mentions were found to be positive. These findings suggest that professionals need to reevaluate the current state of online information about water fluoridation, and improve it in a way so that the public can easily access reliable information sources.
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Affiliation(s)
- H J Oh
- Department of Library and Information Science, Jeonbuk National University, Jeonju, Republic of Korea.,Institute of Medical Information Convergence Research in JBNU, Jeonju, Republic of Korea
| | - C H Kim
- Institute of Medical Information Convergence Research in JBNU, Jeonju, Republic of Korea.,Department of English Literature, Jeonbuk National University, Jeonju, Republic of Korea
| | - J G Jeon
- Institute of Medical Information Convergence Research in JBNU, Jeonju, Republic of Korea.,Department of Preventive Dentistry, School of Dentistry, BK21 plus program, Jeonbuk National University, Jeonju, Republic of Korea
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Oh HJ, Lee H. When Do People Verify and Share Health Rumors on Social Media? The Effects of Message Importance, Health Anxiety, and Health Literacy. J Health Commun 2019; 24:837-847. [PMID: 31609678 DOI: 10.1080/10810730.2019.1677824] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This study explores the roles of perceived message importance, health anxiety, and health literacy in the relationship between message factors (message label and message valence) and behavioral intentions for rumor verification and sharing. 660 Twitter users responded to unverified information regarding the influenza vaccine. A 3 (label: none vs. news vs. rumor) × 2 (valence: positive vs. negative) online semi-experiment, with a survey to measure health anxiety and health literacy, showed the following results: First, perceived message importance mediated the relationship between message factors and behavioral intentions: only in the condition of the negative message, participants considered a news-labeled message more important than a rumor-labeled or a no-label message. Perceived message importance was associated with intentions to verify and share the message. Second, health anxiety interacted with perceived message importance only when predicting an intention to share the message. Last, healthy literacy interacted with perceived message importance when predicting intentions to both verify and share the message. The results will provide implications for health communication research and practices, especially on managing and controlling rumor dissemination on social media.
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Affiliation(s)
- Hyun Jung Oh
- Department of Health & Strategic Communication, CHA University, Pocheon-si, Gyeonggi-do, Republic of Korea
| | - Hyegyu Lee
- School of Management and Economics, Handong Global University, Pohang, Kyungbuk, South Korea
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Park JS, Yi SW, Kim HJ, Oh HJ, Lee JS, Go M, Shim SH, Park KH. Verification of Long-Term Genetic Stability of hMSCs during Subculture after Internalization of Sunflower-Type Nanoparticles (SF-NPs). Am J Cancer Res 2018; 8:5548-5561. [PMID: 30555563 PMCID: PMC6276296 DOI: 10.7150/thno.29214] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Accepted: 10/19/2018] [Indexed: 12/14/2022] Open
Abstract
Background: For many years, researchers have sought to overcome major challenges in the use of nanoparticles as therapeutics, including issues related to intracellular delivery, biocompatibility, and activation. In particular, the genetic stability of cells treated with nanoparticles has become increasingly important in the context of stem cell therapy. Methods: Functional nanoparticles (Sunflower typed nanoparticles; SF-NPs) were fabricated by coating heparin pluronic F127 gels with quantum dot nanoparticles (QDs), and then bound the SOX9 gene to the QD nanogels. The resultant nanoparticles were transferred into stem cells, and the effect on genetic stability was monitored. To determinate gene delivery efficacy and long-term genomic stability of cells transfected with QD nanogels, hMSCs were transfected with nanogels at passage 4 (T1; Transfected cells 1) and then sub-cultured to passage of (T4). Following transplantation of transfected T1-T4 cells, the cells were monitored by in vivo imaging. The genetic stability of cells treated with nanoparticles was confirmed by chromosomal analysis, copy number variation (CNV) analysis, and mRNA profiling. Results: After 21 days of pellet culture after sub-culture from T1 to T4, hMSCs treated with QD nanogels complexed with SOX9 plasmid DNA (pDNA) significantly increased expression of specific extracellular matrix (ECM) polysaccharides and glycoproteins, as determined by Safranin O and Alcian blue staining. Moreover, the T4 hMSCs expressed higher levels of specific proteins, including collagen type II (COLII) and SOX9, than P4 hMSCs, with no evidence of DNA damage or genomic malfunction. Microarray analysis confirmed expression of genes specific to matured chondrocytes. Stem cells that internalized nanoparticles at the early stage retained genetic stability, even after passage. In in vivo studies in rats, neuronal cartilage formation was observed in damaged lesions 6 weeks after transplantation of T1 and T4 cells. The degree of differentiation into chondrocytes in the cartilage defect area, as determined by mRNA and protein expression of COLII and SOX9, was higher in rats treated with SF-NPs. Conclusion: The QD nanogels used in this study, did not affect genome integrity during long-term subculture, and are thus suitable for multiple theranostic applications.
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Im IJ, Choi HJ, Jeong SM, Kim HJ, Son JS, Oh HJ. The association between muscle mass deficits and arterial stiffness in middle-aged men. Nutr Metab Cardiovasc Dis 2017; 27:1130-1135. [PMID: 29170061 DOI: 10.1016/j.numecd.2017.10.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 08/25/2017] [Accepted: 10/01/2017] [Indexed: 01/17/2023]
Abstract
BACKGROUND AND AIMS Early diagnosis of arteriosclerosis is fundamental for the prevention of cardiovascular morbidity and mortality. The current study was performed to identify major predictors of arteriosclerosis and to assess the association between arterial stiffness as measured by cardio-ankle vascular index (CAVI) and muscle mass deficit (MMD) estimated by bioelectrical impedance analysis (BIA) in middle-aged men. METHODS AND RESULTS Data were gathered from 3356 middle-aged men who visited a health promotion center. CAVI was measured as an index of arterial stiffness. Body composition analysis was performed using BIA. MMD was positively associated with CAVI in the regression model. The odds ratios for high-CAVI (≥9.0) rose with MMD grade in a dose-dependent manner after adjusting for age, lifestyle factors and current medication use. The estimated mean CAVI rose as MMD grade increased (P for trend >0.001). CONCLUSIONS MMD estimated from BIA was positively associated with arterial stiffness in middle-aged men. These findings show a close interaction between low muscle mass and cardiovascular risk.
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Affiliation(s)
- I J Im
- Department of Family Medicine, Eulji University Hospital, Daejeon, Republic of Korea
| | - H J Choi
- Department of Family Medicine, Eulji University Hospital, Daejeon, Republic of Korea.
| | - S M Jeong
- Department of Family Medicine, Eulji University Hospital, Daejeon, Republic of Korea
| | - H J Kim
- Department of Family Medicine, Eulji University Hospital, Daejeon, Republic of Korea
| | - J S Son
- Department of Family Medicine, Eulji University Hospital, Daejeon, Republic of Korea
| | - H J Oh
- Department of Family Medicine, Eulji University Hospital, Daejeon, Republic of Korea
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Chu HP, Froberg JE, Kesner B, Oh HJ, Ji F, Sadreyev R, Pinter SF, Lee JT. PAR-TERRA directs homologous sex chromosome pairing. Nat Struct Mol Biol 2017; 24:620-631. [PMID: 28692038 PMCID: PMC5553554 DOI: 10.1038/nsmb.3432] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Accepted: 06/09/2017] [Indexed: 12/25/2022]
Abstract
In mammals, homologous chromosomes rarely pair outside of meiosis. An exception is the X-chromosome, which transiently pairs during X-chromosome inactivation (XCI). How two chromosomes find each other in 3D space is not known. Here, we reveal a required interaction between the X-inactivation center (Xic) and the telomere in mouse embryonic stem cells. The sub-telomeric, pseudoautosomal region (PAR) of both sex chromosomes (X,Y) also undergoes pairing. PAR transcribes a class of telomeric RNA, dubbed “PAR-TERRA”, which accounts for a vast majority of all TERRA transcripts. PAR-TERRA binds throughout the genome, including PAR and Xic. PAR-TERRA anchors the Xic to PAR, creating a “tetrad” of pairwise homologous interactions (Xic:Xic, PAR:PAR, Xic:PAR). Xic pairing occurs within the tetrad. Depleting PAR-TERRA abrogates pairing and blocks initiation of XCI, whereas autosomal PAR-TERRA induces ectopic pairing. We proposed a Constrained Diffusion Model in which PAR-TERRA creates an interaction hub to guide Xic homology searching during XCI.
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Affiliation(s)
- Hsueh-Ping Chu
- Howard Hughes Medical Institute, Boston, Massachusetts, USA.,Department of Molecular Biology, Massachusetts General Hospital, Boston, Massachusetts, USA.,Department of Genetics, Harvard Medical School, Boston, Massachusetts, USA
| | - John E Froberg
- Howard Hughes Medical Institute, Boston, Massachusetts, USA.,Department of Molecular Biology, Massachusetts General Hospital, Boston, Massachusetts, USA.,Department of Genetics, Harvard Medical School, Boston, Massachusetts, USA
| | - Barry Kesner
- Howard Hughes Medical Institute, Boston, Massachusetts, USA.,Department of Molecular Biology, Massachusetts General Hospital, Boston, Massachusetts, USA.,Department of Genetics, Harvard Medical School, Boston, Massachusetts, USA
| | - Hyun Jung Oh
- Howard Hughes Medical Institute, Boston, Massachusetts, USA.,Department of Molecular Biology, Massachusetts General Hospital, Boston, Massachusetts, USA.,Department of Genetics, Harvard Medical School, Boston, Massachusetts, USA
| | - Fei Ji
- Department of Molecular Biology, Massachusetts General Hospital, Boston, Massachusetts, USA.,Department of Pathology, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Ruslan Sadreyev
- Department of Molecular Biology, Massachusetts General Hospital, Boston, Massachusetts, USA.,Department of Pathology, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Stefan F Pinter
- Howard Hughes Medical Institute, Boston, Massachusetts, USA.,Department of Molecular Biology, Massachusetts General Hospital, Boston, Massachusetts, USA.,Department of Genetics, Harvard Medical School, Boston, Massachusetts, USA
| | - Jeannie T Lee
- Howard Hughes Medical Institute, Boston, Massachusetts, USA.,Department of Molecular Biology, Massachusetts General Hospital, Boston, Massachusetts, USA.,Department of Genetics, Harvard Medical School, Boston, Massachusetts, USA
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Oh HJ, Oh HW, Lee DW, Kim CH, Ahn JY, Kim Y, Shin HB, Kim CY, Park SH, Jeon JG. Chronologic Trends in Studies on Fluoride Mechanisms of Action. J Dent Res 2017; 96:1353-1360. [PMID: 28657808 DOI: 10.1177/0022034517717680] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Fluoride has been widely used for the prevention of dental caries since the mid-20th century. The aim of this study was to investigate the chronologic trends in studies on fluoride mechanisms of action against dental caries during the years 1950 to 2015. To this aim, queries such as "fluoride," "fluoride and demineralization," "fluoride and remineralization," "fluoride and (plaque or biofilms)," and "fluoride and (bacteria or microbials)" were submitted to PubMed to collect research article information, including titles, abstracts, publication dates, author affiliations, and publication journals. The article information that PubMed produced was then collected by an automatic web crawler and examined through informetrics and linguistic analyses. We found that the number of articles concerned with fluoride mechanisms of action against dental caries was 6,903 and gradually increased over time during the years 1950 to 2015. They were published by 1,136 journals-most notably, Caries Research and Journal of Dental Research. Of the articles published, those related to bacteria/microbials had a higher percentage (44%) than those dealing with plaque/biofilms, demineralization, and remineralization. With regard to the geographic distribution of authors, Europe and North America accounted for 65% of the articles during the years 1987 to 2015, although the number of authors in Asia sharply increased in recent years. Among the fluoride compounds, NaF was mentioned more frequently than SnF2, Na2PO3F, amine fluoride, and acidulated phosphate fluoride during the years 1986 to 2015. Water fluoridation received the most attention among the various fluoride application methods (toothpastes, mouthwashes, fluoride varnishes, and fluoride gels) during the same period. These results, obtained from employing informetrics and linguistic analyses, suggest that in studies on fluoride mechanisms of action, 1) the unbalanced geographic distribution of articles and 2) the heavy concentration of articles on particular fluoride compounds and application methods should be overcome in future research.
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Affiliation(s)
- H J Oh
- 1 Graduate School of Archives and Records Management, Chonbuk National University, Jeonju, Republic of Korea.,2 Institute of Medical Information Convergence Research, Chonbuk National University, Jeonju, Republic of Korea
| | - H W Oh
- 2 Institute of Medical Information Convergence Research, Chonbuk National University, Jeonju, Republic of Korea.,3 Department of Preventive & Public Health Dentistry, College of Dentistry, Wonkwang University, Iksan, Republic of Korea
| | - D W Lee
- 2 Institute of Medical Information Convergence Research, Chonbuk National University, Jeonju, Republic of Korea.,4 Department of Preventive Dentistry, School of Dentistry, BK21 Program, Chonbuk National University, Jeonju, Republic of Korea
| | - C H Kim
- 2 Institute of Medical Information Convergence Research, Chonbuk National University, Jeonju, Republic of Korea.,5 Department of English Language and Literature, Chonbuk National University, Jeonju, Republic of Korea
| | - J Y Ahn
- 2 Institute of Medical Information Convergence Research, Chonbuk National University, Jeonju, Republic of Korea.,6 Department of Statistics, Chonbuk National University, Jeonju, Republic of Korea
| | - Y Kim
- 1 Graduate School of Archives and Records Management, Chonbuk National University, Jeonju, Republic of Korea.,2 Institute of Medical Information Convergence Research, Chonbuk National University, Jeonju, Republic of Korea
| | - H B Shin
- 2 Institute of Medical Information Convergence Research, Chonbuk National University, Jeonju, Republic of Korea.,7 Department of Surgery, Medical School, Chonbuk National University, Jeonju, Republic of Korea
| | - C Y Kim
- 2 Institute of Medical Information Convergence Research, Chonbuk National University, Jeonju, Republic of Korea.,7 Department of Surgery, Medical School, Chonbuk National University, Jeonju, Republic of Korea
| | - S H Park
- 2 Institute of Medical Information Convergence Research, Chonbuk National University, Jeonju, Republic of Korea.,8 Department of Rehabilitation Medicine, Medical School, Chonbuk National University, Jeonju, Republic of Korea
| | - J G Jeon
- 2 Institute of Medical Information Convergence Research, Chonbuk National University, Jeonju, Republic of Korea.,4 Department of Preventive Dentistry, School of Dentistry, BK21 Program, Chonbuk National University, Jeonju, Republic of Korea
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Affiliation(s)
- Hyegyu Lee
- School of Management and Economics, Handong University, Pohang, South Korea
| | - Hyun Jung Oh
- Department of Health & Strategic Communication, CHA University, Pocheon, South Korea
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18
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Oh HJ, Larose R. Tell Me a Story About Healthy Snacking and I Will Follow: Comparing the Effectiveness of Self-Generated Versus Message-Aided Implementation Intentions on Promoting Healthy Snacking Habits Among College Students. Health Commun 2014; 30:962-974. [PMID: 25256795 DOI: 10.1080/10410236.2014.910289] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In the context of healthy snacking, this study examines whether the quality of mental imagery determines the effectiveness of combining the implementation intention (II) intervention with mental imagery. This study further explores whether providing narrative healthy snacking scenarios prior to forming an II enhances people's mental imagery experience when they are not motivated to snack healthfully. A 2 × 2 factorial design was employed to test the main effect of providing healthy snacking scenarios prior to II formation, and whether such effect depends on people's motivation level. The results from the experiment (N =148) showed significant main as well as interaction effects of the manipulation (with vs. without reading healthy snacking scenarios prior to II formation) and motivation level on ease and vividness of mental imagery. The regression model with the experiment and follow-up survey data (n = 128) showed a significant relationship between ease of mental imagery and actual snacking behavior after controlling for habit strength. The findings suggest that adding a narrative message to the II intervention can be useful, especially when the intervention involves mental imagery and invites less motivated people.
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Affiliation(s)
- Hyun Jung Oh
- a Department of Advertising + Public Relations , Michigan State University
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19
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Hwang SG, Yang A, Kim SJ, Kim MK, Kim SS, Oh HJ, Lee JD, Lee EJ, Nam KW, Han MD. Screening of Hyaluronidase Inhibitor in Korean Medicinal Plants. ACTA ACUST UNITED AC 2014. [DOI: 10.5352/jls.2014.24.5.498] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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20
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Oh HJ, Park SJ, Lim JY, Cho NK, Song JD, Lee W, Lee YJ, Myoung JM, Choi WJ. Fabrication of GaAs/Al0.3Ga0.7As multiple quantum well nanostructures on (100) si substrate using a 1-nm InAs relief layer. J Nanosci Nanotechnol 2014; 14:2984-2989. [PMID: 24734721 DOI: 10.1166/jnn.2014.8593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Nanometer scale thin InAs layer has been incorporated between Si (100) substrate and GaAs/Al0.3Ga0.7As multiple quantum well (MQW) nanostructure in order to reduce the defects generation during the growth of GaAs buffer layer on Si substrate. Observations based on atomic force microscopy (AFM) and transmission electron microscopy (TEM) suggest that initiation and propagation of defect at the Si/GaAs interface could be suppressed by incorporating thin (1 nm in thickness) InAs layer. Consequently, the microstructure and resulting optical properties improved as compared to the MQW structure formed directly on Si substrate without the InAs layer. It was also observed that there exists some limit to the desirable thickness of the InAs layer since the MQW structure having thicker InAs layer (4 nm-thick) showed deteriorated properties.
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21
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Cho JH, Chang SH, Shin NH, Choi BY, Oh HJ, Yoon MJ, Lee EY, Lee EB, Lee TJ, Song YW. Costs of illness and quality of life in patients with systemic lupus erythematosus in South Korea. Lupus 2014; 23:949-57. [PMID: 24563501 DOI: 10.1177/0961203314524849] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Accepted: 01/27/2014] [Indexed: 11/16/2022]
Abstract
OBJECTIVE To assess the costs of illness, health-related quality of life (HRQOL) and their associated factors in patients with systemic lupus erythematosus (SLE) in South Korea. METHOD Two hundred and one patients with SLE were enrolled at the Rheumatology clinic of Seoul National University Hospital. Direct, indirect and total costs and HRQOL were measured using hospital electronic data and face-to-face interview. Socio-demographic and clinical factors associated with cost of illness and HRQOL were analyzed using multiple regression and multivariate logistic regression. RESULTS The average total cost of illness was estimated to be KRW 9.82 million (US $ 8993) per year, of which 41.6% was accounted for by direct costs and 58.4% by indirect costs. In multivariate regression, patients with renal involvement and those with depression incurred an average increment in annual total costs of 37.6% (p = 0.050) and 49.1% (p = 0.024), respectively, and an average increment in annual direct costs of 26.4% (p = 0.050) and 43.3% (p = 0.002), respectively, compared with patients without renal involvement and depression, respectively. In addition, disease damage was positively associated with an average increment in annual total and direct costs (55.3%, p = 0.006; 33.3%, p = 0.013, respectively), and the occurrence of indirect costs (OR 2.21, 1.09-4.88). There was no significant difference in HRQOL between patients with and without renal involvement (0.655 vs. 0.693, p = 0.203) CONCLUSION: Renal involvement, depression, and disease damage were major factors associated with higher total and medical costs for patients with SLE in South Korea. Effective treatment of renal disorders and depression may reduce the high economic burden of SLE.
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Affiliation(s)
- J H Cho
- Graduate School of Public Health, Seoul National University, Seoul, Korea
| | - S H Chang
- Division of Rheumatology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - N H Shin
- Graduate School of Public Health, Seoul National University, Seoul, Korea
| | - B Y Choi
- Division of Rheumatology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - H J Oh
- Division of Rheumatology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - M J Yoon
- Division of Rheumatology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - E Y Lee
- Division of Rheumatology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - E B Lee
- Division of Rheumatology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - T J Lee
- Graduate School of Public Health, Seoul National University, Seoul, Korea
| | - Y W Song
- Division of Rheumatology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology and College of Medicine, Medical Research Center, Seoul National University, Seoul, Korea
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22
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Kim EM, Lee JR, Koo BN, Im YJ, Oh HJ, Lee JH. Analgesic efficacy of caudal dexamethasone combined with ropivacaine in children undergoing orchiopexy. Br J Anaesth 2014; 112:885-91. [PMID: 24491414 DOI: 10.1093/bja/aet484] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Epidural administration of dexamethasone might reduce postoperative pain in adults. We evaluated whether a caudal block of 0.1 mg kg(-1) dexamethasone combined with ropivacaine improves analgesic efficacy in children undergoing day-case orchiopexy. METHODS This randomized, double-blind study included 80 children aged 6 months to 5 yr who underwent day-case, unilateral orchiopexy. Patients received either 1.5 ml kg(-1) of 0.15% ropivacaine (Group C) or 1.5 ml kg(-1) of 0.15% ropivacaine in which dexamethasone of 0.1 mg kg(-1) was mixed (Group D) for caudal analgesia. Postoperative pain scores, rescue analgesic consumption, and side-effects were evaluated 48 h after operation. RESULTS Postoperative pain scores at 6 and 24 h post-surgery were significantly lower in Group D than in Group C. Furthermore, the number of subjects who remained pain free up to 48 h after operation was significantly greater in Group D [19 of 38 (50%)] than in Group C [four of 37 (10.8%); P<0.001]. The number of subjects who received oral analgesic was significantly lower in Group D [11 of 38 (28.9%)] than in Group C [20 of 37 (54.1%); P=0.027]. Time to first oral analgesic administration after surgery was also significantly longer in Group D than in Group C (P=0.014). Adverse events after surgery including vomiting, fever, wound infection, and wound dehiscence were comparable between the two groups. CONCLUSIONS The addition of dexamethasone 0.1 mg kg(-1) to ropivacaine for caudal block can significantly improve analgesic efficacy in children undergoing orchiopexy. Clinical trial registration NCT01604915.
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Affiliation(s)
- E M Kim
- Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, 120-752 Seoul, Republic of Korea
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Paek HJ, Oh HJ, Jung Y, Thompson T, Alaimo K, Risley J, Mayfield K. Assessment of a healthy corner store program (FIT Store) in low-income, urban, and ethnically diverse neighborhoods in Michigan. Fam Community Health 2014; 37:86-99. [PMID: 24297010 DOI: 10.1097/fch.0000000000000014] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This study evaluated a community-based and social marketing healthy corner store program (FIT store) to improve the affordability and availability of healthy foods in low-income, urban, and ethnically diverse neighborhoods in Michigan. The Nutrition Environment Measures Survey in Stores data were analyzed for the FIT (N = 4) stores. Two cross-sectional surveys were conducted among the FIT store customers before (N = 401) and after (N = 318) the intervention. Three FIT stores improved their total Nutrition Environment Measures Survey in Stores availability score from before to after the intervention. A significantly higher level of FIT awareness and monthly bean and nut consumption was reported in the postintervention.
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Affiliation(s)
- Hye-Jin Paek
- Department of Advertising & Public Relations, Hanyang University, Ansan-si, South Korea (Dr Paek); Departments of Advertising and Public Relations (Ms Oh), Telecommunication, Information Studies & Media (Ms Jung), and Food Science and Human Nutrition (Dr Alaimo and Ms Mayfield), Michigan State University, East Lansing; College of Human Medicine, Institute of Public Policy, Michigan State University, Grand Rapids (Ms Thompson); and Office of the VP for Research, Western Michigan University, Kalamazoo (Dr Risley)
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Paek HJ, Hove T, Oh HJ. Multilevel analysis of the impact of school-level tobacco policies on adolescent smoking: the case of Michigan. J Sch Health 2013; 83:679-689. [PMID: 24020681 DOI: 10.1111/josh.12081] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2011] [Revised: 09/07/2012] [Accepted: 10/14/2012] [Indexed: 06/02/2023]
Abstract
BACKGROUND In efforts to curb and prevent youth smoking, school tobacco policies have become an important and effective strategy. This study explores the degrees and types of tobacco-free school policy (TFSP) enforcement that are associated with adolescent smoking. METHODS A multilevel analysis was performed using 983 students who are nested in 14 schools. The individual-level data are drawn from the 2009 Michigan Youth Risk Behavior Survey. The school-level data are drawn from the 2008 School Health Profiles survey. RESULTS Two factors are associated with lower adolescent smoking: greater punishment for TFSP violation and more tobacco control communication efforts. By contrast, the factors associated with higher adolescent smoking are designation of a tobacco-free school zone and school-level smoking. CONCLUSIONS This study theoretically and methodologically guides researchers to test TFSP effectiveness in other states. Three strategic implications emerge: (1) schools should provide a consistent antismoking message in smoke-free environments; (2) schools should integrate TFSP into a comprehensive tobacco control initiative, including community-wide tobacco control programs and messages; and (3) the way a specific TFSP is promoted and communicated could determine how effective it is.
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Affiliation(s)
- Hye-Jin Paek
- Associate Professor, , Department of Advertising & Public Relations, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Kyeonggi-do 426-791, South Korea
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Kim GA, Oh HJ, Park JE, Kim MJ, Park EJ, Jo YK, Jang G, Kim MK, Kim HJ, Lee BC. Species-specific challenges in dog cloning. Reprod Domest Anim 2013; 47 Suppl 6:80-3. [PMID: 23279471 DOI: 10.1111/rda.12035] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Accepted: 07/06/2012] [Indexed: 11/28/2022]
Abstract
Somatic cell nuclear transfer (SCNT) is now an established procedure used in cloning of several species. SCNT in dogs involves multiple steps including the removal of the nuclear material, injection of a donor cell, fusion, activation of the reconstructed oocytes and finally transfer to a synchronized female recipient. There are therefore many factors that contribute to cloning efficiency. By performing a retrospective analysis of 2005-2012 published papers regarding dog cloning, we define the optimum procedure and summarize the specific feature for dog cloning.
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Affiliation(s)
- G A Kim
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul, Korea
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Oh HJ, Lauckner C, Boehmer J, Fewins-Bliss R, Li K. Facebooking for health: An examination into the solicitation and effects of health-related social support on social networking sites. Computers in Human Behavior 2013. [DOI: 10.1016/j.chb.2013.04.017] [Citation(s) in RCA: 151] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ahn IE, Ju JH, Lee SY, Park JS, Oh HJ, Kim HR, Lee SH, Park SH, Kim HY, Cho ML. Upregulation of stromal cell-derived factor by IL-17 and IL-18 via a phosphatidylinositol 3-kinase-dependent pathway. Scand J Immunol 2012; 76:433-9. [PMID: 22690919 DOI: 10.1111/j.1365-3083.2012.02745.x] [Citation(s) in RCA: 13] [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: 01/16/2023]
Abstract
Th17 cells that produce interleukin (IL)-17 play a key role in the pathogenesis of autoimmune inflammation. Among the various cytokines that are involved in the IL-17 pathway, members of the IL-1β family, including IL-18, have recently gained attention. In this study, we stimulated synovial fibroblasts with a combination of IL-17 and IL-18 and quantified their stromal cell-derived factor-1 (SDF-1) production by enzyme-linked immunosorbent assay and their transcript levels by reverse transcription-polymerase chain reaction. Both IL-17 and IL-18 significantly increased the level of SDF-1, not only individually but also synergistically (P< 0.05). The synergism was effectively suppressed by anti-IL-17 and -IL-18 antibodies, and a PI3K inhibitor. To the best of our knowledge, this is the first report of PI3K-dependent synergism between IL-18 and IL-17, and this work adds a novel perspective of the role of IL-18 in immune regulation. The individual effects of these two cytokines, and their interactions, suggest an interrelationship between the IL-1 family and IL-17.
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Affiliation(s)
- I E Ahn
- Rheumatism Research Center (RhRC), Catholic Institute of Medical Sciences, The Catholic University of Korea, Seoul, Korea
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Oh HJ, Park EJ, Lee SY, Soh JW, Kong IS, Choi SW, Ra JC, Kang SK, Lee BC. Comparison of cell proliferation and epigenetic modification of gene expression patterns in canine foetal fibroblasts and adipose tissue-derived mesenchymal stem cells. Cell Prolif 2012; 45:438-44. [PMID: 22925503 DOI: 10.1111/j.1365-2184.2012.00838.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
OBJECTIVES This study compared rate of cell proliferation, viability, cell size, expression patterns of genes related to pluripotency and epigenetic modification between canine foetal fibroblasts (cFF) and canine adipose tissue-derived mesenchymal stem cells (cAd-MSC). MATERIALS AND METHODS Proliferation pattern, cell viability as well as cell size at each passage of cFF and cAd-MSC were measured when cultures reached confluence. In addition, real-time PCR was performed to investigate expression of Dnmt1, HDAC1, OCT4, SOX2, BAX, BCL2 genes with reference to β-actin gene expression as an endogenous control in both cell lines. RESULTS cFF and cAd-MSC differed in number of generations, but not in doubling times, at all passages. Mean cell size of cAd-MSC was significantly smaller than that of cFF. Cell viability was significantly lower in cFFs and apoptotic level was significantly lower in cAd-MSC compared to passage-matched cFF. In the expression of genes related to pluripotency and epigenetic modification, level of HDAC1 in cAd-MSC was significantly higher than in cFF, but expression of Dnmt1 did not differ between the two groups. OCT4 and SOX2 were significantly more highly expressed in cAd-MSC compared to cFF. CONCLUSIONS cAd-MSC have higher stem-cell potential than cFF in terms of proliferation patterns, epigenetic modification and pluripotency, thus cAd-MSC could be more appropriate than cFF as donors of nuclei in somatic cell nuclear transfer for transgenesis.
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Affiliation(s)
- H J Oh
- Department of Theriogenology and Biotechnology, Seoul National University, Seoul, South Korea
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Kim SU, Oh HJ, Wanless IR, Lee S, Han KH, Park YN. The Laennec staging system for histological sub-classification of cirrhosis is useful for stratification of prognosis in patients with liver cirrhosis. J Hepatol 2012; 57:556-63. [PMID: 22617153 DOI: 10.1016/j.jhep.2012.04.029] [Citation(s) in RCA: 102] [Impact Index Per Article: 8.5] [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] [Received: 11/14/2011] [Revised: 04/11/2012] [Accepted: 04/27/2012] [Indexed: 02/08/2023]
Abstract
BACKGROUNDS & AIMS The clinical severity of cirrhosis varies widely. We investigated whether histological sub-classification of cirrhosis using the Laennec system can discriminate different outcomes among patients with cirrhosis. METHODS One hundred and seventy-five patients with chronic liver disease who underwent liver biopsy and showed stage 3 or 4 fibrosis between January 2001 and December 2008 were prospectively enrolled. Cirrhosis was sub-classified into three groups (4A, 4B, and 4C) according to the Laennec system. The end point was liver-related event (LRE) occurrence, including decompensation, hepatocellular carcinoma, and liver-related death. RESULTS The median age of the patients (110 men, 65 women) was 55 years. Stages 3, 4A, 4B, and 4C were identified in 46 (26.3%), 16 (9.1%), 82 (46.9%), and 31 (17.7%) patients, respectively. During the follow-up period, LREs occurred in 32 (18.3%) patients: 4 (8.7%) with stage 3, 2 (12.5%) with stage 4A, 17 (20.7%) with stage 4B, and 9 (29.0%) with stage 4C. In a multivariate analysis, histological sub-classification of cirrhosis independently predicted LRE occurrence. While patients with stage 4A tended to be at higher risk of LRE occurrence than those with stage 3, patients with stages 4B and 4C had significantly higher risks of LRE occurrence, with hazard ratios of 6.158 (p=0.016) and 8.945 (p=0.004), respectively. CONCLUSIONS Histological sub-classification of cirrhosis using the Laennec system can be used to assess the risk of LRE occurrence among patients with cirrhosis. Our study provides a solid basis for further studies of non-invasive methods for monitoring the risk of LRE occurrence and will help physicians to establish optimum treatment strategies.
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Affiliation(s)
- Seung Up Kim
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
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Paek HJ, Oh HJ, Hove T. How media campaigns influence children's physical activity: expanding the normative mechanisms of the theory of planned behavior. J Health Commun 2012; 17:869-885. [PMID: 22650763 DOI: 10.1080/10810730.2011.650832] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This study explicates mechanisms of media campaign effectiveness in the context of children's physical activity. The authors' model expands the theory of planned behavior by integrating injunctive and descriptive norms into its normative mechanism. Analysis of a 3-wave nationally representative evaluation survey among 1,623 tweens indicates that campaign exposure is significantly related, but only indirectly, to both physical activity intention and physical activity behavior. Instead, campaign exposure seems more strongly related to perceived behavioral control and attitudes toward physical activity. By contrast, perceived behavioral control and descriptive norms are strongly related to behavioral intention. The findings suggest that integrating normative mechanisms with the theory of planned behavior can improve efforts to predict and explain a health behavior.
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Affiliation(s)
- Hye-Jin Paek
- Department of Public Relations, Hanyang University, Ansan, South Korea
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Kim JS, Oh SY, Lee SH, Kang JH, Kim DU, Jeong SH, Choi KD, Moon IS, Kim BK, Oh HJ, Kim HJ. Randomized clinical trial for apogeotropic horizontal canal benign paroxysmal positional vertigo. Neurology 2011; 78:159-66. [PMID: 22170885 DOI: 10.1212/wnl.0b013e31823fcd26] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To determine the immediate and long-term therapeutic efficacies of Gufoni and head-shaking maneuvers in apogeotropic type of benign paroxysmal positional vertigo involving the horizontal semicircular canal (HC-BPPV), a randomized, prospective, sham-controlled study was conducted. METHODS In 10 nationwide dizziness clinics in Korea, 157 consecutive patients (95 women, age range: 18-89 years, mean age ± SD = 59.9 ± 13.6) with apogeotropic HC-BPPV were randomized to Gufoni (n = 52), head-shaking (n = 54), or sham maneuver (n = 51). For Gufoni maneuver, patients underwent ipsilesional side-lying and upward head-turn for migration of the debris toward the vestibule. Immediate responses were determined within 1 hour after a maximum of 2 trials of each maneuver and in the following day. The patients also had weekly follow-ups for 1 month after the initial maneuver. RESULTS After a maximum of 2 maneuvers on the initial visit day, Gufoni (38/52, 73.1%) and head-shaking (33/53, 62.3%) maneuvers showed better responses than the sham maneuver (17/49, 34.7%). The cumulative therapeutic effects were also better with Gufoni (p < 0.001) and head-shaking (p = 0.026) maneuvers compared with the sham maneuver. However, therapeutic efficacies did not differ between the Gufoni and head-shaking groups in terms of both immediate (p = 0.129) and long-term (p = 0.239) outcomes. CONCLUSION Using a prospective randomized trial, we demonstrated that the Gufoni and head-shaking maneuvers are effective in treating apogeotropic HC-BPPV. CLASSIFICATION OF EVIDENCE This study provides Class II evidence that Gufoni and head-shaking maneuvers are effective in treating apogeotropic horizontal BPPV up to 1 month after initial treatment. CLINICAL TRIAL REGISTRATION NCT00810641.
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Affiliation(s)
- J-S Kim
- Department of Neurology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seoul, Korea
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Choresca CH, Koo OJ, Hong SG, Oh HJ, Gomez DK, Kim JH, Lee BC, Park SC. Effect of dimethyl sulfoxide on cell cycle synchronization of goldfish caudal fin derived fibroblasts cells. Reprod Domest Anim 2011; 45:e73-7. [PMID: 19788515 DOI: 10.1111/j.1439-0531.2009.01525.x] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Several studies have previously been conducted regarding cell cycle synchronization in mammalian somatic cells. However, limited work has been performed on the control of cell cycle stages in the somatic cells of fish. The aim of this study was to determine the cell cycle arresting effects of several dimethyl sulfoxide (DMSO) concentrations for different times on different cell cycle stages of goldfish caudal fin-derived fibroblasts. Results demonstrated that the cycling cells or control group (68.29%) yields significantly higher (p < 0.05) arrest in G0/G1 phase compared with the group treated for 24 h with different concentrations (0.5%, 1.0% or 1.5%) of DMSO (64.88%, 65.70%, 64.22% respectively). The cell cycle synchronization in the treatment of cells with 1.0% DMSO at 48 h (81.14%) was significantly higher than that in the groups treated for 24 h (76.82%) and the control group (77.90%). Observations showed that treatment of DMSO resulted in an increase in the proportion of cells at G0/G1 phase for 48 h of culture. However, high levels of apoptotic cells can be detected after 48 h of culture treated with 1% concentration of DMSO.
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Affiliation(s)
- C H Choresca
- Laboratory of Aquatic Animal Medicine, Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul Brain Korea 21 Program for Veterinary Science, Seoul National University, Seoul, South Korea
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Oh HJ, Lee B. The effect of computer-mediated social support in online communities on patient empowerment and doctor-patient communication. Health Commun 2011; 27:30-41. [PMID: 21797714 DOI: 10.1080/10410236.2011.567449] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In the context of diabetes, this study tested a mechanism through which Korean diabetes patients' exchange of computer-mediated social support (CMSS) in diabetes online communities influences their sense of empowerment and intention to actively communicate with the doctor. Analysis of data from 464 Korean diabetes patients indicates significant relationships among diabetes patients' online community activities, perceived CMSS, sense of empowerment, and their intention to actively communicate with the doctor. Diabetes patients who have engaged more in online community activities perceived greater social support from other members of the community. Perceived CMSS significantly predicted their intention to actively communicate with the doctor through sense of empowerment. Sense of empowerment was a valid underlying mechanism that explains how patients' perceived CMSS influences their intention to actively communicate with the doctor. The implications for health communication research and practice are discussed.
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Affiliation(s)
- Hyun Jung Oh
- Department of Advertising, PR, & Retailing, Michigan State University, MI, USA
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Shahi PK, Choi S, Zuo DC, Yeum CH, Yoon PJ, Lee J, Kim YD, Park CG, Kim MY, Shin HR, Oh HJ, Jun JY. 5-hydroxytryptamine generates tonic inward currents on pacemaker activity of interstitial cells of cajal from mouse small intestine. Korean J Physiol Pharmacol 2011; 15:129-35. [PMID: 21860590 DOI: 10.4196/kjpp.2011.15.3.129] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Revised: 06/13/2011] [Accepted: 06/14/2011] [Indexed: 12/22/2022]
Abstract
In this study we determined whether or not 5-hydroxytryptamine (5-HT) has an effect on the pacemaker activities of interstitial cells of Cajal (ICC) from the mouse small intestine. The actions of 5-HT on pacemaker activities were investigated using a whole-cell patch-clamp technique, intracellular Ca(2+) ([Ca(2+)](i)) analysis, and RT-PCR in ICC. Exogenously-treated 5-HT showed tonic inward currents on pacemaker currents in ICC under the voltage-clamp mode in a dose-dependent manner. Based on RT-PCR results, we found the existence of 5-HT(2B, 3, 4, and 7) receptors in ICC. However, SDZ 205557 (a 5-HT(4) receptor antagonist), SB 269970 (a 5-HT7 receptor antagonist), 3-tropanylindole - 3 - carboxylate methiodide (3-TCM; a 5-HT(3) antagonist) blocked the 5-HT-induced action on pacemaker activity, but not SB 204741 (a 5-HT(2B) receptor antagonist). Based on [Ca(2+)](i) analysis, we found that 5-HT increased the intensity of [Ca(2+)](i). The treatment of PD 98059 or JNK II inhibitor blocked the 5-HT-induced action on pacemaker activity of ICC, but not SB 203580. In summary, these results suggest that 5-HT can modulate pacemaker activity through 5-HT(3, 4, and 7) receptors via [Ca(2+)](i) mobilization and regulation of mitogen-activated protein kinases.
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Affiliation(s)
- Pawan Kumar Shahi
- Department of Physiology, College of Medicine, Chosun University, Gwangju 501-759, Korea
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Yun HJ, Yoon JH, Lee JK, Noh KT, Yoon KW, Oh SP, Oh HJ, Chae JS, Hwang SG, Kim EH, Maul GG, Lim DS, Choi EJ. Daxx mediates activation-induced cell death in microglia by triggering MST1 signalling. EMBO J 2011; 30:2465-76. [PMID: 21572393 DOI: 10.1038/emboj.2011.152] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2010] [Revised: 04/18/2011] [Indexed: 12/23/2022] Open
Abstract
Microglia, the resident macrophages of the mammalian central nervous system, migrate to sites of tissue damage or infection and become activated. Although the persistent secretion of inflammatory mediators by the activated cells contributes to the pathogenesis of various neurological disorders, most activated microglia eventually undergo apoptosis through the process of activation-induced cell death (AICD). The molecular mechanism of AICD, however, has remained unclear. Here, we show that Daxx and mammalian Ste20-like kinase-1 (MST1) mediate apoptosis elicited by interferon-γ (IFN-γ) in microglia. IFN-γ upregulated the expression of Daxx, which in turn mediated the homodimerization, activation, and nuclear translocation of MST1 and apoptosis in microglial cells. Depletion of Daxx or MST1 by RNA interference also attenuated IFN-γ-induced cell death in primary rat microglia. Furthermore, the extent of IFN-γ-induced death of microglia in the brain of MST1-null mice was significantly reduced compared with that apparent in wild-type mice. Our results thus highlight new functions of Daxx and MST1 that they are the key mediators of microglial cell death initiated by the proinflammatory cytokine IFN-γ.
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Affiliation(s)
- Hee Jae Yun
- School of Life Sciences and Biotechnology, Korea University, Seoul, Korea
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Im W, Lee ST, Park JE, Oh HJ, Shim J, Lim J, Chu K, Kim M. Transplantation of patient-derived adipose stem cells in YAC128 Huntington's disease transgenic mice. PLoS Curr 2010; 2:k/-/-/38qfyasyoha87/1. [PMID: 20890444 PMCID: PMC2946829 DOI: 10.1371/currents.rrn1183] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Accepted: 09/27/2010] [Indexed: 01/19/2023]
Abstract
Huntington’s disease (HD) is a genetic neurodegenerative disorder caused by abnormal expansion of CAG in the huntingtin gene. In R6/2 HD transgenic mice, human adipose-derived stem cells (ASCs) can slow disease progression via secretion of multiple paracrine growth factors. In order to prompt autologous ASCs transplantation in HD, we isolated ASCs from subcutaneous adipose tissues from a HD patient and a normal volunteer. ASCs were grown in two different types of stem cell culture media, EGM-2MV (endothelial growth medium-2 MV) or mesenchymal culture medium (MesenPRO). Cell-surface markers CD13, CD29, CD31, CD34, and CD44 were characterized by flow cytometry. BDNF, HGF, IGF, LIF, NGF, and VEGF expressions were determined by RT-PCR. Cell surface markers for HD ASCs were similar to those for normal ASCs. HD ASCs expressed multiple growth factors, and were similar to normal ASCs, except for NGF; however, they can be altered by culture medium. ASCs were transplanted in bilateral striata of 8 month-old YAC128 mice. At 12 months of age, normal ASCs reduced striatal atrophy, while HD ASCs failed to prevent it. Compared to the control YAC128 group, no improvement in Rotarod performance was observed in any of the transplanted YAC128 mice. However, when normal ASCs were transplanted at 12 months, Rotarod performance was maintained for 4 weeks, with detectable transplanted cells in the striatum and periventricular area. In summary, cultured HD patient-derived ASCs express multiple growth factors with the same cell surface markers as those of normal ASCs in vitro. The efficacy of ASCs transplantation in YAC128 transgenic models can be modified, depending on the time window.
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Affiliation(s)
- Wooseok Im
- Neurology, Seoul National University Hospital, Seoul, South Korea
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Lee SH, Oh HJ, Kim DH. Kinetic Monte Carlo simulation for the striation distribution of void defects in Czochralski silicon growth. Molecular Simulation 2010. [DOI: 10.1080/08927021003720512] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Kim MJ, Oh HJ, Park JE, Hong SG, Kang JT, Koo OJ, Kang SK, Jang G, Lee BC. Influence of oocyte donor and embryo recipient conditions on cloning efficiency in dogs. Theriogenology 2010; 74:473-8. [PMID: 20452009 DOI: 10.1016/j.theriogenology.2010.03.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2009] [Revised: 01/26/2010] [Accepted: 03/07/2010] [Indexed: 11/16/2022]
Abstract
To determine factors that affect the efficiency of dog cloning by somatic cell nuclear transfer, the present study was performed to investigate 1) the effects of surgical history (non-operated/operated) and parity (nullipara/multipara) on the recovery of in vivo canine oocytes; 2) the effects of surgical history and parity of recipients on the pregnancy and delivery; and 3) the effects of synchronization state (AA, advanced asynchrony; SY, synchrony; RA, retarded asynchrony) between oocytes donor and recipient on the pregnancy and delivery. Oocyte recovery rate was significantly higher in non-operated dogs compared to operated dogs (93.8 vs. 89.6%, P < 0.05) and not different between nulliparous dogs and multiparous dogs. Delivery rate was also significantly higher in non-operated dogs compared to operated dogs (2.8 vs. 1.0%, P < 0.05) and in nulliparous dogs than multiparous dogs (3.0 vs. 1.7%, P < 0.05). Even though SY showed increased pregnancy and delivery rate (20.0% and 3.0%) compared to AA (15.0% and 2.0%) and RA (0.0% and 0.0%), there was no significant difference. In conclusion, we recommend non-operated dogs as experimental dogs and nulliparous dogs as recipient dogs to increase delivery rate after transfer of somatic cell nuclear transferred embryos, but further study is needed to find out appropriate synchrony status at the transfer.
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Affiliation(s)
- M J Kim
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul, 151-742, Korea
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Lee SH, Cho HJ, Oh HJ, Kim DH. Kinetic Monte Carlo simulation for the void defects formation in Czochralski silicon growth. Molecular Simulation 2010. [DOI: 10.1080/08927020903236348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Oh HJ, Kim MJ, Song SJ, Kim T, Lee D, Kwon SH, Choi EJ, Lim DS. MST1 Limits the Kinase Activity of Aurora B to Promote Stable Kinetochore-Microtubule Attachment. Curr Biol 2010; 20:416-22. [DOI: 10.1016/j.cub.2009.12.054] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2009] [Revised: 12/08/2009] [Accepted: 12/22/2009] [Indexed: 12/26/2022]
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An SSA, Lim KT, Oh HJ, Lee BS, Zukic E, Ju YR, Yokoyama T, Kim SY, Welker E. Differentiating blood samples from scrapie infected and non-infected hamsters by detecting disease-associated prion proteins using Multimer Detection System. Biochem Biophys Res Commun 2010; 392:505-9. [PMID: 20085753 DOI: 10.1016/j.bbrc.2010.01.053] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2010] [Accepted: 01/14/2010] [Indexed: 10/20/2022]
Abstract
This communication describes the application of a modified sandwich enzyme-linked immunosorbent assay (ELISA), termed Multimer Detection System (MDS) for the detection of disease-associated multimeric forms of the prion protein (PrPd) in hamster blood. PrPd was detected in plasma of prion-affected hamsters while MDS revealed no PrPd in identically-treated plasma of healthy animals. This is the first report of a single ELISA- based immune detection of PrPd from blood samples.
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Affiliation(s)
- S S A An
- Department of Bionano Technology, Kyungwon University, Sungnam-si, Kyungki-do 461-701, South Korea.
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Song H, Oh S, Oh HJ, Lim DS. Role of the tumor suppressor RASSF2 in regulation of MST1 kinase activity. Biochem Biophys Res Commun 2010; 391:969-73. [DOI: 10.1016/j.bbrc.2009.11.175] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Accepted: 11/26/2009] [Indexed: 01/06/2023]
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Choi MY, Oh HJ, Kwon KJ, Song EM, Kim SH, Jun YH, Choi HJ, Kim YK. A Case Report on Successful Nonsurgical Treatment Using Antibiotics Alone in Aortic Stent Infection Diagnosed by Positron Emission Tomography. Infect Chemother 2010. [DOI: 10.3947/ic.2010.42.6.407] [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: 11/24/2022] Open
Affiliation(s)
- Min Young Choi
- Department of Internal Medicine, Ewha Womans University, College of Medicine, Seoul, Korea
| | - Hyun Jung Oh
- Department of Internal Medicine, Ewha Womans University, College of Medicine, Seoul, Korea
| | - Kyoung Joo Kwon
- Department of Internal Medicine, Ewha Womans University, College of Medicine, Seoul, Korea
| | - Eun Mi Song
- Department of Internal Medicine, Ewha Womans University, College of Medicine, Seoul, Korea
| | - Soo Hyun Kim
- Department of Internal Medicine, Ewha Womans University, College of Medicine, Seoul, Korea
| | - Yun Hee Jun
- Department of Internal Medicine, Ewha Womans University, College of Medicine, Seoul, Korea
| | - Hee Jung Choi
- Department of Internal Medicine, Ewha Womans University, College of Medicine, Seoul, Korea
| | - Yoo Kyoung Kim
- Department of Radiology, Ewha Womans University, College of Medicine, Seoul, Korea
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Choi J, Oh S, Lee D, Oh HJ, Park JY, Lee SB, Lim DS. Mst1-FoxO signaling protects Naïve T lymphocytes from cellular oxidative stress in mice. PLoS One 2009; 4:e8011. [PMID: 19956688 PMCID: PMC2776980 DOI: 10.1371/journal.pone.0008011] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2009] [Accepted: 11/04/2009] [Indexed: 11/19/2022] Open
Abstract
Background The Ste-20 family kinase Hippo restricts cell proliferation and promotes apoptosis for proper organ development in Drosophila. In C. elegans, Hippo homolog also regulates longevity. The mammalian Ste20-like protein kinase, Mst1, plays a role in apoptosis induced by various types of apoptotic stress. Mst1 also regulates peripheral naïve T cell trafficking and proliferation in mice. However, its functions in mammals are not fully understood. Methodology/Principal Findings Here, we report that the Mst1-FoxO signaling pathway plays a crucial role in survival, but not apoptosis, of naïve T cells. In Mst1−/− mice, peripheral T cells showed impaired FoxO1/3 activation and decreased FoxO protein levels. Consistently, the FoxO targets, Sod2 and catalase, were significantly down-regulated in Mst1−/− T cells, thereby resulting in elevated levels of intracellular reactive oxygen species (ROS) and induction of apoptosis. Expression of constitutively active FoxO3a restored Mst1−/− T cell survival. Crossing Mst1 transgenic mice (Mst1 Tg) with Mst1−/− mice reduced ROS levels and restored normal numbers of peripheral naïve T cells in Mst1 Tg;Mst1−/− progeny. Interestingly, peripheral T cells from Mst1−/− mice were hypersensitive to γ-irradiation and paraquat-induced oxidative stresses, whereas those from Mst1 Tg mice were resistant. Conclusions/Significance These data support the hypothesis that tolerance to increased levels of intracellular ROS provided by the Mst1-FoxOs signaling pathway is crucial for the maintenance of naïve T cell homeostasis in the periphery.
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Affiliation(s)
- Juhyun Choi
- National Research Laboratory of Molecular Genetics, Department of Biological Sciences, Biomedical Research Center, Korea Advanced Institute of Science and Technology, Daejeon, South Korea
| | - Sangphil Oh
- National Research Laboratory of Molecular Genetics, Department of Biological Sciences, Biomedical Research Center, Korea Advanced Institute of Science and Technology, Daejeon, South Korea
| | - Dongjun Lee
- National Research Laboratory of Molecular Genetics, Department of Biological Sciences, Biomedical Research Center, Korea Advanced Institute of Science and Technology, Daejeon, South Korea
| | - Hyun Jung Oh
- National Research Laboratory of Molecular Genetics, Department of Biological Sciences, Biomedical Research Center, Korea Advanced Institute of Science and Technology, Daejeon, South Korea
| | - Jik Young Park
- Genetics of Development and Disease Branch, National Institute of Diabetes & Digestive & Kidney Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Sean Bong Lee
- Genetics of Development and Disease Branch, National Institute of Diabetes & Digestive & Kidney Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Dae-Sik Lim
- National Research Laboratory of Molecular Genetics, Department of Biological Sciences, Biomedical Research Center, Korea Advanced Institute of Science and Technology, Daejeon, South Korea
- * E-mail:
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Park JE, Oh HJ, Hong SG, Jang G, Kim MK, Lee BC. Effects of activin A on the in vitro development and mRNA expression of bovine embryos cultured in chemically-defined two-step culture medium. Reprod Domest Anim 2008; 45:585-93. [PMID: 19090825 DOI: 10.1111/j.1439-0531.2008.01306.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The purpose of the present study was to evaluate the effects of activin A on the developmental competence of in vitro fertilized (IVF) bovine embryos derived from a two-step defined culture system (C1/C2 medium) during the early or later stages of embryo development. To evaluate the effects of activin A on transcriptional levels, we analysed genes related to blastocyst hatching and implantation and to activin signalling pathway in IVF embryos. Cumulus-oocyte complexes were matured for 22 h and fertilized in vitro. Presumptive zygotes were cultured in the presence or absence of activin A during early (0-120 h, C1) or later (120-192 h, C2) stages. Although the developmental competence of embryos cultured with activin A in C1 medium was not significantly different from their corresponding controls, development to blastocysts (22.4% vs 34.7%; p < 0.05) and the blastocyst hatching rate (9.3% vs 22.4%; p < 0.05) in C2 medium supplemented with 100 ng/ml activin A were significantly higher than in the control group. To evaluate the effect of activin A on transcription, the relative expression levels of genes related to blastocyst hatching and implantation (Na/K-ATPase, E-cad and Glut-1) as well as activin signalling pathway (ActRII, ActRIIB and Smad2) were analysed. Compared to control medium, gene expression of Na/K-ATPase, E-cad, Glut-1, ActRII and ActRIIB was increased in medium supplemented with activin A. In conclusion, this study suggests that activin A, during the later stage of in vitro bovine embryo development, can enhance in vitro development of embryos by increasing hatching rates and affecting expression levels of genes related to hatching and implantation in defined culture medium.
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Affiliation(s)
- J E Park
- Department of Theriogenology and Biotechnology, SeoulNational University, Seoul, Korea
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Jang G, Oh HJ, Kim MK, Fibrianto YH, Hossein MS, Kim HJ, Kim JJ, Hong SG, Park JE, Kang SK, Lee BC. Improvement of canine somatic cell nuclear transfer procedure. Theriogenology 2007; 69:146-54. [PMID: 17949804 DOI: 10.1016/j.theriogenology.2007.08.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2006] [Revised: 05/21/2007] [Accepted: 08/08/2007] [Indexed: 10/22/2022]
Abstract
The purpose of the present study on canine somatic cell nuclear transfer (SCNT) was to evaluate the effects of fusion strength, type of activation, culture media and site of transfer on developmental potential of SCNT embryos. We also examined the potential of enucleated bovine oocytes to serve as cytoplast recipients of canine somatic cells. Firstly, we evaluated the morphological characteristics of in vivo-matured canine oocytes collected by retrograde flushing of the oviducts 72 h after ovulation. Secondly, the effectiveness of three electrical strengths (1.8, 2.3 and 3.3 kV/cm), used twice for 20 micros, on fusion of canine cytoplasts with somatic cells were compared. Then, we compared: (1) chemical versus electrical activation (a) after parthenogenetic activation or (b) after reconstruction of canine oocytes with somatic cells; (2) culture of resulting intergeneric (IG) embryos in either (a) mSOF or (b) TCM-199. The exposure time to 6-DMAP was standardized by using bovine oocytes reconstructed with canine somatic cells. Bovine oocytes were used for SCNT after a 22 h in vitro maturation interval. The fusion rate was significantly higher in the 3.3 kV/cm group than in the 1.8 and 2.3 kV/cm treatment groups. After parthenogenesis or SCNT with chemical activation, 3.4 and 5.8%, respectively, of the embryos developed to the morula stage, as compared to none of the embryos produced using electrical activation. Later developmental stages (8-16 cells) were transferred to the uterine horn of eight recipients, but no pregnancy was detected. However, IG cloned embryos (bovine cytoplast/canine somatic cell) were capable of in vitro blastocyst development. In vitro developmental competence of IG cloned embryos was improved after exposure to 6-DMAP for 4 h as compared to 0, 2 or 6h exposure, although the increase was not significantly different among culture media. In summary, for production of canine SCNT embryos, we recommend fusion at 3.3 kV/cm, chemical activation, culture in mSOF medium and transfer of presumptive zygotes to the oviduct of recipient animals. The feasibility of IG production of cloned canine embryos using bovine cytoplasts as recipient of canine somatic cells was demonstrated.
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Affiliation(s)
- G Jang
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
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Jang G, Kim MK, Oh HJ, Hossein MS, Fibrianto YH, Hong SG, Park JE, Kim JJ, Kim HJ, Kang SK, Kim DY, Lee BC. Birth of viable female dogs produced by somatic cell nuclear transfer. Theriogenology 2006; 67:941-7. [PMID: 17169419 DOI: 10.1016/j.theriogenology.2006.11.006] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.1] [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: 10/08/2006] [Accepted: 11/03/2006] [Indexed: 11/20/2022]
Abstract
Since the only viable cloned offspring born in dogs was a male, the purpose of the present study was to produce female puppies by somatic cell nuclear transfer (SCNT). Adult ear fibroblasts from a 2-month-old female Afghan hound were isolated and used as donor cells. In vivo-matured canine oocytes surgically collected (approximately 72h after ovulation) from the oviducts of 23 donors were used for SCNT. After removal of the cumulus cells, oocytes were enucleated, microinjected, fused with a donor cell, and activated. A total of 167 reconstructed SCNT embryos were surgically transferred (Day 0) into the oviducts of 12 recipient bitches (average 13.9 embryos/recipient, range 6-22) with spontaneous, synchronous estrous cycles. Three pregnancies were detected by ultrasonography on Day 23, maintained to term, and three healthy female puppies (520, 460, and 520g), were delivered by Caesarean section on Day 60. These puppies were phenotypically and genotypically identical to the cell donor. In conclusion, we have provided the first demonstration that female dogs can be produced by nuclear transfer of ear fibroblasts into enucleated canine oocytes.
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Affiliation(s)
- G Jang
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 151-742, Republic of Korea
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Abstract
OBJECTIVE This cross-sectional study evaluated the association between serum minerals and body mass index in adult women. METHODS One hundred and eighteen adult women were recruited by written advertisement from outpatient clinics or a health promotion center at a university hospital. Serum calcium, magnesium, copper and zinc were measured by an automatic analytical instrument and body mass index was calculated from height and weight. RESULTS Serum magnesium was inversely associated with body mass index (beta=-0.283, P=0.001) whereas serum copper had a positive association with body mass index (beta=0.197, P=0.025) after adjusting for age, physical activity, energy intake, dietary fat, alcohol consumption, supplements and menopause status. No associations were found with serum calcium and zinc. CONCLUSION Serum magnesium and copper may be involved in the regulation of body size in adult women.
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Affiliation(s)
- C H Song
- Department of Family Medicine, St Mary's Hospital, School of Medicine, The Catholic University of Korea, Seoul, Korea.
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Kim JA, Kim SM, Choi YS, Yoon D, Lee JS, Park HS, Kim HA, Lee J, Oh HJ, Choi KM. The prevalence and risk factors associated with isolated untreated systolic hypertension in Korea: the Korean National Health and Nutrition Survey 2001. J Hum Hypertens 2006; 21:107-13. [PMID: 17108991 DOI: 10.1038/sj.jhh.1002119] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Although isolated systolic hypertension (ISH) increases the risk of coronary heart disease and stroke, more than any other hypertension subtype, the prevalence and risk factors associated with ISH in the Korean population are not known. The 2001 Korean National Health and Nutrition Survey was a cross-sectional and nationally representative survey conducted in 2001. The prevalence of ISH by age and body mass index (BMI) was examined in 6601 Korean adults over 20 years of age. After adjusting for age, 4.32+/-0.32% of Korean adults had ISH, 5.28+/-0.37% had isolated diastolic hypertension and 5.82+/-0.36% had systolic/diastolic hypertension. The overall prevalence of ISH was found to increase directly with advancing age and increasing BMI. Although the ISH was found to be more common in men overall (4.81+/-0.50% in men, 4.12+/-0.37% in women), it was more common in women over 70 years of age. Independent variables associated with risk for ISH included advanced age, BMI, triglyceride (TG) levels, monthly income and alcohol intake. However, gender, fasting blood glucose, total cholesterol and high-density lipoprotein cholesterol levels, residential area, education level and smoking were found not to be significantly associated with ISH risk. The findings of the present study demonstrate that the prevalence of untreated ISH in Korea was lower than in Western countries. Age, BMI, TG levels, monthly income and alcohol intake were associated with ISH.
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Affiliation(s)
- J A Kim
- Department of Family Medicine, Cheil General Hospital and Women's Health Care Center, Seoul, Korea
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