1
|
Hwang J, Hwang SS, Kim HB, Lee J, Lee J. Risk compensation after COVID-19 vaccination: Evidence from vaccine rollout by exact birth date in South Korea. Health Econ 2024. [PMID: 38728372 DOI: 10.1002/hec.4837] [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: 08/14/2023] [Revised: 04/17/2024] [Accepted: 04/22/2024] [Indexed: 05/12/2024]
Abstract
We utilize the phased rollout of COVID-19 vaccines by exact birth date in South Korea as a natural experiment for testing risk compensation. People may resume face-to-face social activities following vaccination because they perceive lower risk of infection. Applying a regression discontinuity design based on birth date cutoffs for vaccine eligibility, we find no evidence of risk-compensating behaviors, as measured by large, high-frequency data from credit card and airline companies as well as survey data. We find some evidence of self-selection into vaccine take-up based on perception toward vaccine effectiveness and side effects, but the treatment effects do not differ between compliers and never-takers.
Collapse
Affiliation(s)
- Jisoo Hwang
- College of Liberal Studies, Seoul National University, Gwanak-gu, Korea
| | - Seung-Sik Hwang
- Graduate School of Public Health, Seoul National University, Gwanak-gu, Korea
| | - Hyuncheol Bryant Kim
- Department of Economics and Division of Public Policy, Hong Kong University of Science and Technology, Hong Kong, Hong Kong
| | - Jungmin Lee
- Department of Economics, Seoul National University, Gwanak-gu, Korea
| | - Junseok Lee
- Department of Economics, UC Berkeley, Berkeley, California, USA
| |
Collapse
|
2
|
Kwon JE, Jang Y, Yun BS, Kang S, Kim YH, Kim BG, Cho NH. MET overexpression in ovarian cancer via CD24-induced downregulation of miR-181a: A signalling for cellular quiescence-like state and chemoresistance in ovarian CSCs. Cell Prolif 2024; 57:e13582. [PMID: 38030594 PMCID: PMC11056702 DOI: 10.1111/cpr.13582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 11/15/2023] [Accepted: 11/17/2023] [Indexed: 12/01/2023] Open
Abstract
Increased expression of CD24 and MET, markers for cancer stem-like cells (CSCs), are each associated with ovarian cancer severity. However, whether CD24 and MET are co-expressed in ovarian CSCs and, if so, how they are related to CSC phenotype manifestation remains unknown. Our immunohistochemistry analysis showed that the co-expression of CD24 and MET was associated with poorer patient survival in ovarian cancer than those without. In addition, analyses using KM plotter and ROC plotter presented that the overexpression of CD24 or MET in ovarian cancer patients was associated with resistance to platinum-based chemotherapy. In our miRNA transcriptome and putative target genes analyses, miR-181a was downregulated in CD24-high ovarian cancer cells compared to CD24-low and predicted to bind to CD24 and MET 3'UTRs. In OV90 and SK-OV-3 cells, CD24 downregulated miR-181a expression by Src-mediated YY1 activation, leading to increased expression of MET. And, CD24 or MET knockdown or miR-181a overexpression inhibited the manifestation of CSC phenotypes, cellular quiescence-like state and chemoresistance, in OV90 and SK-OV-3 cells: increased colony formation, decreased G0/G1 phase cell population and increased sensitivity to Cisplatin and Carboplatin. Our findings suggest that CD24-miR-181a-MET may consist of a signalling route for ovarian CSCs, therefore being a combinatory set of markers and therapeutic targets for ovarian CSCs.
Collapse
Affiliation(s)
- Ji Eun Kwon
- Department of PathologyAjou University School of MedicineSuwonKorea
- Brain Korea 21 Plus Project for Medical ScienceYonsei University College of MedicineSeoulKorea
| | - Yeonsue Jang
- Department of PathologyYonsei University College of MedicineSeoulKorea
| | - Bo Seong Yun
- Department of Gynecology Obstetrics and Gynecology, CHA Gangnam Medical CenterCHA UniversitySeoulKorea
| | - Suki Kang
- Department of PathologyYonsei University College of MedicineSeoulKorea
| | - Yon Hee Kim
- Department of PathologySoonchunhyang University HospitalSeoulKorea
| | - Baek Gil Kim
- Brain Korea 21 Plus Project for Medical ScienceYonsei University College of MedicineSeoulKorea
- Department of PathologyYonsei University College of MedicineSeoulKorea
| | - Nam Hoon Cho
- Brain Korea 21 Plus Project for Medical ScienceYonsei University College of MedicineSeoulKorea
- Department of PathologyYonsei University College of MedicineSeoulKorea
- Severance Biomedical Science Institute (SBSI)Yonsei University College of MedicineSeoulKorea
| |
Collapse
|
3
|
Jo H, Park DH. Effects of ChatGPT's AI capabilities and human-like traits on spreading information in work environments. Sci Rep 2024; 14:7806. [PMID: 38565880 PMCID: PMC10987623 DOI: 10.1038/s41598-024-57977-0] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 03/23/2024] [Indexed: 04/04/2024] Open
Abstract
The rapid proliferation and integration of AI chatbots in office environments, specifically the advanced AI model ChatGPT, prompts an examination of how its features and updates impact knowledge processes, satisfaction, and word-of-mouth (WOM) among office workers. This study investigates the determinants of WOM among office workers who are users of ChatGPT. We adopted a quantitative approach, utilizing a stratified random sampling technique to collect data from a diverse group of office workers experienced in using ChatGPT. The hypotheses were rigorously tested through Structural Equation Modeling (SEM) using the SmartPLS 4. The results revealed that system updates, memorability, and non-language barrier attributes of ChatGPT significantly enhanced knowledge acquisition and application. Additionally, the human-like personality traits of ChatGPT significantly increased both utilitarian value and satisfaction. Furthermore, the study showed that knowledge acquisition and application led to a significant increase in utilitarian value and satisfaction, which subsequently increased WOM. Age had a positive influence on WOM, while gender had no significant impact. The findings provide theoretical contributions by expanding our understanding of AI chatbots' role in knowledge processes, satisfaction, and WOM, particularly among office workers.
Collapse
Affiliation(s)
- Hyeon Jo
- Headquarters, HJ Institute of Technology and Management, 71 Jungdong-ro 39, Bucheon-si, Gyeonggi-do, 14721, Republic of Korea
| | - Do-Hyung Park
- Graduate School of Business IT, Kookmin University, 77, Jeongneung-ro, Seongbuk-gu, Seoul, 02707, Republic of Korea.
| |
Collapse
|
4
|
Abstract
Controversy over which reliability estimators should be used persists due to a lack of knowledge about their accuracy. Simulation is an effective tool to obtain an answer, but existing simulation studies yield contradictory results regarding which reliability estimators are the best. The causes of these inconsistent conclusions have yet to be discussed. This study reanalyzes existing studies to understand these contradictions. The most important reason is that previous studies consider only a few reliability estimators. This study examines approximately 30 reliability estimators and finds that there is no single, most accurate reliability estimator across all data types. Instead, several reliability estimators are accurate to comparable levels for unidimensional data (congeneric reliability, Guttman's lambda2, and ten Berge-Zegers's mu). Likewise, multiple reliability estimators perform similarly for multidimensional data (multidimensional parallel reliability, correlated factors reliability, and second-order factor reliability). Whereas many recent studies support factor analysis (FA) reliability estimators, this study shows that not all FA reliability estimators are accurate and that some cause severe overestimation. (PsycInfo Database Record (c) 2024 APA, all rights reserved).
Collapse
Affiliation(s)
- Eunseong Cho
- College of Business Administration, Kwangwoon University
| |
Collapse
|
5
|
Yang H. Posttraumatic growth experiences of North Korean adolescent refugees living in South Korea: A qualitative case study. Psychol Trauma 2024:2024-60608-001. [PMID: 38451714 DOI: 10.1037/tra0001668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/09/2024]
Abstract
OBJECTIVE This study aimed to explore the posttraumatic growth (PTG) experiences of North Korean adolescent refugees. The qualitative context of PTG experiences and influencing factors was explored based on the experiences vividly described by North Korean adolescent refugees. METHOD I recruited participants for a qualitative case study, targeting "high-growth type" and "low-growth type" adolescents classified through latent profile analysis. A 1:1 in-depth interview was conducted with five high-growth and four low-growth adolescents who agreed to participate in the study. RESULTS Their PTG appeared to coexist with posttraumatic stress disorder symptoms such as anxiety and depression. In addition, the PTG of North Korean refugee adolescents was particularly remarkable in the areas of "personal strength" and "relating to others." The influencing factors of PTG were described in the qualitative contexts of "constructive rumination process," "self-disclosure," "peer network from both South and North Korea," and "role of significant others." CONCLUSIONS This study confirmed that North Korean adolescent refugees actively strive for growth after trauma. In order to lead their PTG better, specific interventions are required for intentional rumination process, human support resources, and self-opening that affect PTG. This study has academic value in that it compares and verifies the factors affecting PTG by interviewing high- and low-growth adolescents. (PsycInfo Database Record (c) 2024 APA, all rights reserved).
Collapse
Affiliation(s)
- Hyerin Yang
- Center for Social Welfare Research, Kyungpook National University
| |
Collapse
|
6
|
Son H, Jang H, Park H, Kim J. Children's bullying victimization and the acculturative stress of immigrant mothers in Korea: Exploring heterogeneity by mother's country of origin. Cultur Divers Ethnic Minor Psychol 2024:2024-57320-001. [PMID: 38407071 DOI: 10.1037/cdp0000655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
OBJECTIVES Over the past three decades, the number of multicultural families in Korea, defined as a family consisting of a native Korean and a marriage immigrant, has increased significantly. Although bullying victimization among multicultural family youth is rightfully a growing concern, less is known about the effects bullying has on immigrant mothers of children who have been bullying victims. METHOD Using data from the Multicultural Adolescents Panel Study, this study investigates whether children's bullying victimization is associated with immigrant mothers' acculturative stress and whether this association differs depending on mothers' country of origin (China, Japan, and Southeast Asian countries). RESULTS Fixed effects estimates revealed that children's bullying victimization is positively associated with their immigrant mother's acculturative stress, and this association is robust to controlling for unobserved time-constant individual-level heterogeneity. When stratified by mother's country of origin, the association was larger and statistically significant only among Southeast Asian mothers. No associations were observed among Japanese and Chinese mothers. CONCLUSIONS Our findings suggest that interventions aiming to support bullied children should be expanded to also support their immigrant mothers. Policymakers may wish to consider the specific backgrounds and contexts of immigrant mothers, with special attention to Southeast Asian women. (PsycInfo Database Record (c) 2024 APA, all rights reserved).
Collapse
Affiliation(s)
- Hyewon Son
- Department of Health Policy and Management, Korea University
| | - Hayun Jang
- Department of Health Policy and Management, Korea University
| | - Hansol Park
- Department of Health Policy and Management, Korea University
| | - Jinho Kim
- Department of Health Policy and Management, Korea University
| |
Collapse
|
7
|
Lee M. Introjected regulation and academic burnout: A moderated mediation model of social comparison and distress overtolerance. Stress Health 2024:e3381. [PMID: 38380890 DOI: 10.1002/smi.3381] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 12/01/2023] [Accepted: 01/30/2024] [Indexed: 02/22/2024]
Abstract
The primary purpose of this study is to examine the mediation effect of Contrastive Upward Comparison (CUC) on the relationship between introjected regulation and exhaustion (i.e., introjected regulation-CUC-exhaustion). It is also aimed to examine the moderation effect of distress overtolerance on this mediated relationship. In order to resolve the uncertainty about the causality of cross-sectional studies, this study worked on the relationship among the variables by setting an alternative model (i.e., CUC-introjected regulation - exhaustion). The participants were 167 (females, 70.7%) undergraduate and graduate students in South Korea. The results of this study indicated that introjected regulation showed indirect and significant effect on exhaustion via CUC. However, in the alternative model, the indirect effect of introjected regulation in the relationship between CUC and exhaustion was not significant. Furthermore, high distress overtolerance buffered the relationship between introjected regulation and CUC, while it strengthened the association of CUC and exhaustion. Lastly, the results of moderated mediation suggested that students with higher distress overtolerance, experienced more CUC, and emotional exhaustion. The implications and limitations were also discussed.
Collapse
|
8
|
Kang Y, Baek I, Park J. Assessing heatwave effects on disabled persons in South Korea. Sci Rep 2024; 14:3459. [PMID: 38342943 PMCID: PMC10859370 DOI: 10.1038/s41598-024-54015-x] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 02/07/2024] [Indexed: 02/13/2024] Open
Abstract
This study investigated the risk of heatwaves for people with disabilities and other socioeconomic attributes using Health Care Bigdata in South Korea. The Health Care Bigdata provides detailed information on heat-related illness (HRI) patients in 2011-2020 from seven major cities. We employed the Distributed Lag Nonlinear Model (DLNM) to measure heat waves' relative risk. Our findings are four-fold. First, the relative risk (RR) of disabled people was 5.075 (95% confidence interval 4.476-5.674), significantly surpassing that of non-disabled people, 3.296 (2.517-4.075). Second, among various personal characteristics studied, disability influenced RR the most, exceeding impacts from elderly (4.457: 3.748-5.166), low-income (3.909: 3.004-4.813), and outdoor (4.052: 2.940-5.164). Third, the disabled young group (5.305: 4.414-6.195) was more vulnerable than the non-disabled elderly group (4.287: 3.576-4.999). Lastly, no significant difference in relative risk was observed between the mild (4.413: 3.855-4.971) and severe disabled groups (4.013: 3.121-4.905).
Collapse
Affiliation(s)
- Yeji Kang
- Kongju National University, 56 Gongjudaehak-Ro, Gongju, 32588, South Korea
| | - Ingul Baek
- Kongju National University, 56 Gongjudaehak-Ro, Gongju, 32588, South Korea
| | - Jongchul Park
- Kongju National University, 56 Gongjudaehak-Ro, Gongju, 32588, South Korea.
| |
Collapse
|
9
|
Fu H, Oh S. Topics of questions and community interaction in social Q&A during the COVID-19 pandemic. Health Info Libr J 2023; 40:417-429. [PMID: 37555296 DOI: 10.1111/hir.12506] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 06/18/2023] [Accepted: 07/26/2023] [Indexed: 08/10/2023]
Abstract
BACKGROUND Considering social distancing requirements and isolation during the COVID-19 pandemic and the widespread health mis/disinformation on social media, filling the pandemic-related information gap is critical. OBJECTIVES This study explored COVID-19-related question topics, topic correlation, evolving trends, and community interactions by leveraging data from a health question-answering (Q&A) community (public and health professionals) over a 2-year period. METHODS A total of 828 questions were collected and manually reviewed from a health Q&A and classified into 2492 codes. Question topic correlations, trends, and community interactions were generated using different statistical techniques. RESULTS Thirty-seven topics were identified, and strong topic correlations were observed between the cognitive layer and other layers. These topics changed as the pandemic developed. Community interaction analyses revealed topics that were popular but received comparatively fewer responses. DISCUSSION The findings could illuminate the dynamic changes in people's interests and concerns related to COVID-19 and their experiences of exchanging information in social Q&A communities. CONCLUSION This study examined the practical significance of understanding topics of interest during a pandemic. The findings can inform the design of social health Q&A platforms that could reduce the risks of misinformation and disinformation.
Collapse
Affiliation(s)
- Hengyi Fu
- School of Library and Information Studies, University of Alabama, Tuscaloosa, Alabama, USA
| | - Sanghee Oh
- Department of Library and Information Science, Sungkyunkwan University, Seoul, Republic of Korea
| |
Collapse
|
10
|
Haixia L, Lee JH, Oh S, Seo E, Ha MS. Body composition affects blood lipids and vascular function in metabolically unhealthy or metabolically healthy older adult women with obesity: A multi-group path analysis/impact verification following latent profile analysis. Am J Hum Biol 2023; 35:e23962. [PMID: 37489847 DOI: 10.1002/ajhb.23962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 07/01/2023] [Accepted: 07/04/2023] [Indexed: 07/26/2023] Open
Abstract
OBJECTIVES This study aimed to perform latent profile analysis (LPA) in older adult women with metabolic syndrome to extract a group according to their characteristics while controlling for body composition, blood lipid levels, and vascular function. The study also examined the relationship between different variables. METHODS The participants were 35 women aged ≥65 years, who met the Korean female standards for metabolic syndrome. Blood collection, blood pressure measurements, and vascular function measurements were performed. LPA and multigroup path analysis (MGPA) were performed to statistically analyze the effects of body composition on blood lipid levels and vascular function in older adult women with metabolic syndrome. Mplus 8.3 and jamovi 2.0.0 were used for the analyses, and the control significance level was set at .05. RESULTS The participants were divided into the following three groups: (G1) metabolically unhealthy participants with normal weight, (G2) normal-weight participants with arteriosclerosis, and (G3) obese but metabolically healthy participants (G3). The effect of body composition on blood lipid levels showed a significant difference only in G1. The effect of body composition on vascular function was influenced by various variables in G1 and G3, while G1 showed a higher explanatory power. CONCLUSIONS The MGPA results showed that the relationship between variables differs depending on the group. Therefore, the metabolic syndrome should be studied by subdividing it and confirming the characteristics of the classified groups, such as normal-weight but metabolically unhealthy individuals and obese but metabolically healthy individuals.
Collapse
Affiliation(s)
- Li Haixia
- College of Winter Olympics, Harbin Institute of Physical Education, Harbin, China
| | - Jae-Hoon Lee
- Department of Sports Science, College of the Arts and Sports, University of Seoul, Seoul, Republic of Korea
| | - SiYeon Oh
- College of Art and Physical Education, Chosun University, Gwangju, Republic of Korea
| | - EunChul Seo
- Department of Physical Education, Wonkwang University, lksan, Republic of Korea
| | - Min-Seong Ha
- Department of Sports Science, College of the Arts and Sports, University of Seoul, Seoul, Republic of Korea
| |
Collapse
|
11
|
Shin S, Joung J. COVID-19 coping experiences of individuals with schizophrenia: A grounded theory approach in Korea. Int J Ment Health Nurs 2023; 32:1713-1723. [PMID: 37522422 DOI: 10.1111/inm.13197] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 06/22/2023] [Accepted: 07/12/2023] [Indexed: 08/01/2023]
Abstract
Humankind has responded to the profound medical, economic, social, and cultural consequences of coronavirus disease 2019 (COVID-19) by employing various strategies. However, although individuals with mental disorders, including schizophrenia, have suffered more challenges from the infectious disease spread, they have received inadequate attention and care. Hence, this study aimed to explore the experiences of individuals with schizophrenia coping with COVID-19; one-to-one interviews were conducted with 17 individuals diagnosed with schizophrenia in Korea. The data were analysed using grounded theory methodology. The results showed that individuals with schizophrenia became distanced from the routine care they received before COVID-19, faced a dual threat from their mental illness and the emerging infectious disease, and experienced inequity and paradoxical situations. Nevertheless, they strived to live their daily lives by utilizing non-face-to-face access, seeking support from mental health professionals, and devising self-help measures. Moreover, reflecting on their lives throughout the pandemic after returning to their regular daily lives provided an opportunity for healing and growth. This study's results can provide evidence for treating individuals with schizophrenia and other mental disorders during subsequent infectious disease spread. Practical policies and interventions tailored to their vulnerabilities are required.
Collapse
Affiliation(s)
| | - Jaewon Joung
- College of Nursing, Research Institute of Nursing Science, Jeonbuk National University, Jeonju, Korea
| |
Collapse
|
12
|
Jo H, Park DH. A study of user switching intention for ERP systems based on push-pull-mooring model: Focusing on the important role of information quality for users. PLoS One 2023; 18:e0289483. [PMID: 37943778 PMCID: PMC10635462 DOI: 10.1371/journal.pone.0289483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 07/19/2023] [Indexed: 11/12/2023] Open
Abstract
Enterprise resource planning (ERP) systems have become indispensable within companies due to their substantial functions and benefits. With a plethora of ERP systems available in the market, management is offered a broad array of options. This paper endeavours to identify the determinants influencing the switching intention of ERP users. Utilizing a conceptual model that adapts the push-pull-mooring paradigm, we seek to construct a formation mechanism of switching intention. Through structural equation modeling conducted on data collected from 236 users, our study uncovers several key findings. The study indicates that system quality, information quality, and top management support exert considerable influence on switching intention via satisfaction. Notably, we found that user satisfaction has a negative impact on switching intention. Our analysis also reveals that alternative attractiveness significantly determines switching intention. These findings provide valuable insights for organizations and ERP vendors to better understand user behaviour and to strategically manage user retention and switching decisions.
Collapse
Affiliation(s)
- Hyeon Jo
- HJ Institute of Technology and Management, Bucheon-si, Gyeonggi-do, Republic of Korea
| | - Do-Hyung Park
- Graduate School of Business IT, Kookmin University, Seoul, Republic of Korea
| |
Collapse
|
13
|
Park H, Kim H, Kwak S, Youm Y, Chey J. Association between Loneliness and Memory Function through White Matter Hyperintensities in Older Adults: The Moderating Role of Gender. Behav Sci (Basel) 2023; 13:869. [PMID: 37887519 PMCID: PMC10604491 DOI: 10.3390/bs13100869] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 10/16/2023] [Accepted: 10/19/2023] [Indexed: 10/28/2023] Open
Abstract
Loneliness has an important impact on memory function in late life. However, the neural mechanism by which loneliness detrimentally influences memory function remains elusive. Furthermore, it remains unclear whether the association between loneliness and memory function varies by gender. The current study aimed to investigate the neural mechanism underlying the association between loneliness and episodic memory function and explore whether it varies with gender among cognitively normal older adults. A total of 173 community-dwelling adults aged 60 years or older from the Korean Social Life, Health, and Aging Project (KSHAP) study (mean age = 71.87) underwent an assessment of loneliness, neuropsychological testing, and structural magnetic resonance imaging. The association between loneliness and episodic memory function was mediated by the volume of white matter hyperintensities (WMHs), but not by hippocampal or gray matter volumes. In addition, the association between loneliness and memory function through WMHs was significantly moderated by gender; specifically, the indirect effect was significant among men but not among women. The study suggests that WMHs may be a potential neurological mechanism that causes late-life memory dysfunction associated with loneliness in older men. The findings underscore the need for gender-specific interventions to mitigate memory impairment associated with late-life loneliness, with significant public health implications.
Collapse
Affiliation(s)
- Hyeyoung Park
- Department of Psychology, Seoul National University, Seoul 08826, Republic of Korea; (H.P.); (H.K.)
| | - Hairin Kim
- Department of Psychology, Seoul National University, Seoul 08826, Republic of Korea; (H.P.); (H.K.)
| | - Seyul Kwak
- Department of Psychology, Pusan National University, Busan 46241, Republic of Korea;
| | - Yoosik Youm
- Department of Sociology, Yonsei University, Seoul 03722, Republic of Korea;
| | - Jeanyung Chey
- Department of Psychology, Seoul National University, Seoul 08826, Republic of Korea; (H.P.); (H.K.)
| |
Collapse
|
14
|
Cheon SH, Reeve J, Marsh HW, Jang HR. Cluster randomized control trial to reduce peer victimization: An autonomy-supportive teaching intervention changes the classroom ethos to support defending bystanders. Am Psychol 2023; 78:856-872. [PMID: 36701523 DOI: 10.1037/amp0001130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Peer victimization is a worldwide crisis unresolved by 50 years of research and intervention. We capitalized on recent methodological advances and integrated self-determination theory with a social-ecological perspective. We provided teachers with a professional development experience to establish a highly supportive classroom climate that enabled the emergence of pro-victim student bystanders during bullying episodes. In our longitudinal cluster randomized control trial, we randomly assigned 24 teachers (15 men, 9 women; 19 middle school, 5 high school; 32.8 years old, 6.7 years of experience) in 48 classrooms to the autonomy-supportive teaching (AST) workshop (24 classrooms) or the no-intervention control (24 classrooms). Their 1,178 students (age: M = 13.7, SD = 1.5; range = 11-18) reported their perceived teacher autonomy support; perceived classmates' autonomy support; adoption of the defender role; and peer victimization at the beginning, middle, and end of an 18-week semester. A doubly latent multilevel structural equation model with follow-up mediation tests showed that experimental-group teachers created a substantially more supportive classroom climate, leading student bystanders to embrace the defender role. This classroom-wide (L2) emergence of pro-victim peer bystanders led to sharply reduced victimization (effect size = -.40). Unlike largely unsuccessful past interventions that focused mainly on individual students, our randomized control trial intervention substantially reduced bullying and victimization. Focusing on individual students is likely to be ineffective (even counterproductive) without first changing the normative climate that reinforces bullying. Accordingly, our intervention focused on the classroom teacher. In the classrooms of these teachers, bystanders supported the victims because the classroom climate supported the bystanders. (PsycInfo Database Record (c) 2023 APA, all rights reserved).
Collapse
Affiliation(s)
- Sung Hyeon Cheon
- Department of Physical Education, College of Education, Korea University
| | - Johnmarshall Reeve
- Institute for Positive Psychology and Education, Australian Catholic University
| | - Herbert W Marsh
- Institute for Positive Psychology and Education, Australian Catholic University
| | - Hye-Ryen Jang
- Institute for Positive Psychology and Education, Australian Catholic University
| |
Collapse
|
15
|
Gouda M, Yang Y. Investigating the impact of a community disaster awareness training on subjective disaster preparedness: the case of Myanmar's Ayeyarwaddy region. Disasters 2023; 47:1047-1068. [PMID: 36772994 DOI: 10.1111/disa.12575] [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] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
This paper investigates the impact of a community disaster awareness training on subjective disaster preparedness, focusing on the case of a Republic of Korean aid-supported disaster risk reduction project in the Ayeyarwaddy region of Myanmar. A subsequent survey by the authors of a total of 182 households, an equal number of project participating and control households, produced encouraging results regarding the endeavour. Although both ordinal logistic regression and ordinary least squares models support overall robust effectiveness of participating in the project, the results also reveal different effects of specific activities. Disaster risk reduction (DRR) awareness meetings and trainings, and personal visits to share knowledge and/or to distribute informative flyers, are important. In contrast, the significance of drills or community activities, in mass, is lost in a combined model. Consequently, 'personalising risk' should be prioritised in any DRR undertaking, as well as, and in particular, development cooperation aimed at increasing confidence in disaster preparedness.
Collapse
Affiliation(s)
- Moamen Gouda
- Professor, Graduate School of International and Area Studies, Hankuk University of Foreign Studies, Republic of Korea
| | - Yunjeong Yang
- Professor, Graduate School of International and Area Studies, Hankuk University of Foreign Studies, Republic of Korea
| |
Collapse
|
16
|
Opoku MA, Kang SW, Choi SB. The influence of sleep on job satisfaction: examining a serial mediation model of psychological capital and burnout. Front Public Health 2023; 11:1149367. [PMID: 37693724 PMCID: PMC10483141 DOI: 10.3389/fpubh.2023.1149367] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Accepted: 08/11/2023] [Indexed: 09/12/2023] Open
Abstract
Introduction This study draws on the conservation of resources theory to investigate whether the loss of sleep can trigger the loss of additional resources that are necessary for work. Methods Using cross-sectional design of 322 call center employees working at a government-owned public bank in South Korea, we test the study hypotheses using regression and bootstrapping indirect effects analyses. Results The results of analyses show that insufficient sleep increases employee burnout and that psychological capital mediates this relationship. We also find that insufficient sleep decreases job satisfaction via a serial mediation model such that insufficient sleep reduces psychological capital, which in turn increases burnout, and ultimately results in lower job satisfaction. Discussion The findings reinforce the previous assessment that although sleep is a non-work factor, its impact spills over to the workplace. Theoretically, this study goes beyond direct effect to uncover the underlying or mediating mechanisms that account for the impact of the sleep-burnout relationship and the sleep-job satisfaction relationship. For managers, the results highlight the significance of sleep to employees' overall health and well-being and thus underscore the need to foster a work culture that recognizes and prioritizes employee sleep needs.
Collapse
Affiliation(s)
- Mavis Agyemang Opoku
- Gordon S. Lang School of Business and Economics, University of Guelph, Guelph, ON, Canada
| | - Seung-Wan Kang
- College of Business, Gachon University, Seongnam, Republic of Korea
| | - Suk Bong Choi
- College of Global Business, Korea University, Sejong City, Republic of Korea
| |
Collapse
|
17
|
Lee JK, Lee J, Chung MK, Park JY, Shin T, Lee KJ, Lim HS, Hwang S, Urtnasan E, Jo Y, Kim MH. Childhood adversity and late-life depression: moderated mediation model of stress and social support. Front Psychiatry 2023; 14:1183884. [PMID: 37435403 PMCID: PMC10331618 DOI: 10.3389/fpsyt.2023.1183884] [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] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 06/01/2023] [Indexed: 07/13/2023] Open
Abstract
Background As life expectancy increases, understanding the mechanism for late-life depression and finding a crucial moderator becomes more important for mental health in older adults. Childhood adversity increases the risk of clinical depression even in old age. Based on the stress sensitivity theory and stress-buffering effects, stress would be a significant mediator, while social support can be a key moderator in the mediation pathways. However, few studies have tested this moderated mediation model with a sample of older adults. This study aims to reveal the association between childhood adversity and late-life depression in older adults, taking into consideration the effects of stress and social support. Methods This study used several path models to analyze the data from 622 elderly participants who were never diagnosed with clinical depression. Results We found that childhood adversity increases the odds ratio of depression by approximately 20% in older adults. Path model with mediation demonstrates that stress fully mediates the pathway from childhood adversity to late-life depression. Path model with moderated mediation also illustrates that social support significantly weakens the association between childhood adversity and perceived stress. Conclusion This study provides empirical evidence to reveal a more detailed mechanism for late-life depression. Specifically, this study identifies one crucial risk factor and one protective factor, stress and social support, respectively. This brings insight into prevention of late-life depression among those who have experienced childhood adversity.
Collapse
Affiliation(s)
- Jin-kyung Lee
- Institute for Poverty Alleviation and International Development, Yonsei University Mirae Campus, Wonju, Republic of Korea
| | - Jinhee Lee
- Department of Psychiatry, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Moo-Kwon Chung
- Institute for Poverty Alleviation and International Development, Yonsei University Mirae Campus, Wonju, Republic of Korea
- Department of Global Public Administration, Yonsei University Mirae Campus, Wonju, Republic of Korea
| | - Ji Young Park
- Department of Social Welfare, Sangji University, Wonju, Republic of Korea
| | - Taeksoo Shin
- Division of Business Administration, Yonsei University Mirae Campus, Wonju, Republic of Korea
| | - Kyoung-Joung Lee
- Department of Biomedical Engineering, Yonsei University Mirae Campus, Wonju, Republic of Korea
| | - Hyo-Sang Lim
- Division of Software, Yonsei University Mirae Campus, Wonju, Republic of Korea
| | - Sangwon Hwang
- Department of Precision Medicine, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Erdenebayar Urtnasan
- Artificial Intelligence Bigdata Medical Center, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Yongmie Jo
- Department of Global Public Administration, Yonsei University Mirae Campus, Wonju, Republic of Korea
| | - Min-Hyuk Kim
- Department of Psychiatry, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| |
Collapse
|
18
|
Jung JH, Ko JY, Hong I, Jung MY, Park JH. Effects of a time-use intervention in isolated patients with coronavirus disease 2019: A randomized controlled study. PLoS One 2023; 18:e0287118. [PMID: 37352320 PMCID: PMC10289446 DOI: 10.1371/journal.pone.0287118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 05/24/2023] [Indexed: 06/25/2023] Open
Abstract
OBJECTIVE Patients with coronavirus disease experience deterioration in occupational balance and mental health. The primary objective of this study was to determine the effectiveness of a time-use intervention on the occupational balance of isolated patients with coronavirus disease. Its impact on secondary outcomes including mental health and quality of life was also assessed. METHODS This randomized controlled clinical trial was conducted in a single community-based hospital. Forty-one patients (19 in the experimental group and 22 in the control group) with coronavirus disease were recruited between February 1, 2021, and March 19, 2021. Participants were randomly assigned to receive a time-use intervention or education on self-activity. The time-use intervention is to plan a daily routine to engage in meaningful occupations. It consisted of 4 steps: time-use analysis, occupation selection, arrangement of activities and practice, and occupational therapist intervention. The control group was educated on self-activity and spent time autonomously. OUTCOMES AND MEASURES The primary outcome was occupational balance, evaluated using the Korean version of the Life Balance Inventory. Secondary outcomes were mental health and quality of life assessed using the Korean version of the Patient Health Questionnaire-9, Korean Form of Zung's Self-Rating Anxiety Scale, Korean version of the Insomnia Severity Index, Multidimensional State Boredom Scale-8, Fear of Coronavirus Disease: Korean version of the Fear of Coronavirus Disease Scale, and World Health Organization Quality of Life Assessment Instrument-BRIEF. Outcome measures were evaluated at admission and discharge. RESULTS The time-use intervention significantly improved occupational balance (F = 14.12, p < .001) and all other measures of depression, anxiety, boredom, fear, and quality of life. Conversely, the control group showed a worsening pattern for all measures. CONCLUSION The time-use intervention is effective for improving occupational balance, mental health, and quality of life in patients with coronavirus disease.
Collapse
Affiliation(s)
- Jae Hyu Jung
- Department of Occupational Therapy, Gyeonggi Provincial Medical Center, Gyeonggi-do, Republic of Korea
| | - Jin Young Ko
- Department of Public Health Care (Rehabilitation), Seoul National University Bundang Hospital, Seongnam-si, Republic of Korea
| | - Ickpyo Hong
- Department of Occupational Therapy, Yonsei University, Wonju, Republic of Korea
| | - Min-Ye Jung
- Department of Occupational Therapy, Yonsei University, Wonju, Republic of Korea
| | - Ji-Hyuk Park
- Department of Occupational Therapy, Yonsei University, Wonju, Republic of Korea
| |
Collapse
|
19
|
Kwon N, Kim SY. Effects of intelligence and approximate number system on the non-symbolic division ability in preschoolers. Front Psychol 2023; 14:961140. [PMID: 37425165 PMCID: PMC10328115 DOI: 10.3389/fpsyg.2023.961140] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Accepted: 05/29/2023] [Indexed: 07/11/2023] Open
Abstract
Recently, it has become evident that cognitive abilities such as the approximate number system (ANS), number knowledge, and intelligence affect individuals' fundamental mathematical ability. However, it is unclear which of these cognitive abilities have the greatest impact on the non-symbolic division ability in preschoolers. Therefore, in the present study, we included 4- to 6-year-old Korean preschoolers without prior formal education of division in order to test their ability to solve non-symbolic division problems, ANS acuity, and intelligence, and to determine the interrelationships among those functions (N = 38). We used the Panamath Dot Comparison Paradigm to measure the ANS acuity, employed non-symbolic division tasks to measure the ability to solve non-symbolic division problems, and measured the intelligence using the Korean version of the WPPSI-IV (Wechsler Preschool Primary Scale of Intelligence-IV). Our results showed that, in all conditions of the non-symbolic division tasks, the 4- to 6-years old children were able to perform better than chance level. Additionally, in a relatively easy condition, the children's performance showed a significant positive correlation with full-scale intelligence quotient (FSIQ) and ANS acuity; however, in a more complex condition, only FSIQ was significantly correlated with their performance. Overall, we found significant relationships between the children's performance in the non-symbolic division tasks and verbal comprehension, fluid reasoning, and processing speed index. Taken together, our findings demonstrate that preschoolers without formal education on the arithmetic problem solving can solve non-symbolic division problems. Moreover, we suggest that both FSIQ and ANS ability play essential roles in children's ability to solve non-symbolic division problems, highlighting the significance of intelligence on children's fundamental mathematical ability.
Collapse
|
20
|
Kim S, Nam K. Examining interhemispheric processing and task demand in lexical decision-making: insights from lateralized visual field paradigm. Front Psychol 2023; 14:1208786. [PMID: 37397304 PMCID: PMC10311436 DOI: 10.3389/fpsyg.2023.1208786] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 05/26/2023] [Indexed: 07/04/2023] Open
Abstract
This study aimed to investigate the influence of task demand on the uni-/bi-hemispheric processing of lexical decision-making. Two types of nonwords were used in parafoveal and foveal lexical decision tasks (LDTs) to manipulate task demand. In Experiment 1, a visual half-field paradigm was utilized to evaluate the unihemispheric strategy in lexical decision, which revealed a significant response bias toward "word" at the RVF/LH in the pseudoword LDT in contrast with the nonword LDT, indicating the strategic use of orthographical legality in LH for word-pseudoword lexical decision. In Experiment 2, the study evaluated whether foveal lexical decision follows the orthographical legality strategy of LH in pseudoword LDT relative to the nonword LDT. The results showed a response bias toward "word" in the foveal pseudoword LDT in contrast with the foveal nonword LDT, suggesting the recruitment of LH in foveal pseudoword LDT. These findings support the left-dominant bihemispheric processing in foveal lexical decision and contribute to our understanding of the mechanisms underlying lexical decision-making.
Collapse
Affiliation(s)
- Sangyub Kim
- Wisdom Science Center, Korea University, Seoul, South Korea
| | - Kichun Nam
- School of Psychology, Korea University, Seoul, South Korea
| |
Collapse
|
21
|
Son JY, Han JH, Kim SC, Choi WS, Hong HJ. Korean adolescent suicide and search volume for "self-injury" on internet search engines. Front Psychiatry 2023; 14:1186754. [PMID: 37346904 PMCID: PMC10279855 DOI: 10.3389/fpsyt.2023.1186754] [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] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 05/17/2023] [Indexed: 06/23/2023] Open
Abstract
Introduction Many adolescents with suicidal ideation receive support through the Internet. However, they also find ways to attempt suicide or strengthen their suicidal ideation through this medium. This study analyzed the association between the search volume of suicide-related terms and the number of suicides among Korean adolescents. We also analyzed the correlations between the search volumes of suicide-related terms. Methods We selected seven words (suicide, self-injury, depression, academic score, school violence, outcasts, and family trouble) related to adolescent suicide. A dataset was constructed by combining data from the most commonly used search engine in Korea (Naver Datalab) and the daily number of adolescent suicides in school settings (n = 347) from January 1, 2016 to December 31, 2018, collected from the Ministry of Education. Poisson regression and Pearson correlation analyses were performed. Results Significant associations were found between suicide attempts and search term volumes, which differed according to sex and time interval. Among the search terms, "self-injury" was most strongly associated with suicide, and this association was significant at all time intervals (daily, weekly, and monthly) in female adolescents and in the total population. Further, the association was strongest in the daily suicide data. More search term volumes were related to suicide in the daily and weekly data than in the monthly data. There were positive correlations between "suicide," "self-injury," and "depression" search volumes. Conclusion Further studies with larger sample sizes, more search terms, and analysis of time intervals between suicide-related term search and suicide death are required. These studies can contribute to the establishment of an online suicide prevention system to detect suicide risk in adolescents and provide interventions.
Collapse
Affiliation(s)
- Jin Yeong Son
- Department of Psychiatry, Hallym University Sacred Heart Hospital, Anyang, Republic of Korea
| | - Jun Hee Han
- Department of Psychiatry, Hallym University Sacred Heart Hospital, College of Medicine, Hallym University, Anyang, Republic of Korea
| | - Seung Chan Kim
- Department of Biostatistics, Clinical Trial Center, Biomedical Research Institute, Pusan National University Hospital, Busan, Republic of Korea
| | - Won-Seok Choi
- Department of Psychiatry, Yeouido St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hyun Ju Hong
- Department of Psychiatry, Hallym University Sacred Heart Hospital, Anyang, Republic of Korea
- Hallym University Suicide and School Mental Health Institute, Anyang, Republic of Korea
| |
Collapse
|
22
|
Kim T, Kim D. Chilly climate perceived by female engineering undergraduates: an exploratory study using concept mapping. Front Psychol 2023; 14:1145795. [PMID: 37333590 PMCID: PMC10274324 DOI: 10.3389/fpsyg.2023.1145795] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Accepted: 05/16/2023] [Indexed: 06/20/2023] Open
Abstract
Introduction Women still being a minority in engineering majors, they are reported to face discriminatory treatment in a collegiate environment. "Chilly climate," referring to such a sexist environment, may have a negative impact on women's mental health, academics, and careers. But, what exactly is it that female students in engineering perceive as chilly, and how chilly is it? This study aimed to explore the chilly campus climate perceived by female undergraduate engineering students in South Korea using the concept mapping method. Methods Semi-structured interviews were conducted with 13 participants enrolled for more than four semesters at four-year coeducational universities. After extracting 52 representative statements, the participants were asked to classify them according to content similarity and rate the influence of each statement on their perception of the chilly climate. For concept mapping analysis, multidimensional scaling analysis (ALSCAL), hierarchical cluster analysis (Ward's method), and non-hierarchical cluster analysis (K-means method) were performed. Results Fifty-two statements were extracted under the following four clusters: (i) "Exclusion and alienation inherent in the culture (Cluster 1)," (ii) "Sexual objectification and lack of gender sensitivity (Cluster 2)," (iii) "Male-centered academic situations (Cluster 3)," and (iv) "Prejudice and generalization (Cluster 4)." A concept map was two-dimensional: an X-axis named "context dimension," with "task: academic" and "non-task: social" at both ends, and a Y-axis named "sexism dimension", having "explicit" and "implicit" at both ends. The order of higher scores in the influence rating is as follows: Cluster 2, Cluster 3, Cluster 1, and Cluster 4. Discussion This study is significant because it conceptualizes the subjective experience of minorities in a collegiate environment and provides influence rating results for prioritized measures. The findings will be helpful in formulating educational policies, psychological counseling, and social advocacy activities. Future research should target larger populations, and cover more diverse cultures, majors, and age groups.
Collapse
|
23
|
Zaman W, Ullah F, Park S. Foliar epidermal anatomical characteristics of Apiaceae species endemic to Ulleungdo and Dokdo Islands, Republic of Korea. Microsc Res Tech 2023. [PMID: 37083080 DOI: 10.1002/jemt.24322] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 03/11/2023] [Accepted: 04/02/2023] [Indexed: 04/22/2023]
Abstract
The foliar epidermal anatomical characteristics of the two endemic Apiaceae species of Korea Bupleurum latissimum Nakai and Dystaenia takesimana (Nakai) Kitag. were investigated. The taxonomically important characteristics of these two species were identified and described to help understand their classical taxonomy. Scanning electron microscopy (SEM) was used to observe the anatomical characteristics of the studied species in detail. The comparative foliar epidermal anatomical characteristics were observed in the present research for the two-endemic species. Some of the most important foliar epidermal anatomical characteristics were observed to distinguish them, including the epidermal cell shape and size, stomata type, and trichomes shape and size. SEM provided sufficient evidence to distinguish the study species. The foliar epidermal anatomical characteristics provide sufficient information to differentiate these two species from their closely related taxa. RESEARCH HIGHLIGHTS: Apiaceae species endemic to Ulleungdo and Dokdo Islands exhibit unique foliar epidermal anatomical characteristics that can be used for taxonomic identification and classification. This study contributes to the documentation of the plant diversity of Ulleungdo and Dokdo Islands, and highlights the need for further research on the biogeography and conservation of these endemic plant species.
Collapse
Affiliation(s)
- Wajid Zaman
- Department of Life Sciences, Yeungnam University, Gyeongsan, Republic of Korea
| | - Fazal Ullah
- State Key Laboratory of Grassland Agro-ecosystems, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - SeonJoo Park
- Department of Life Sciences, Yeungnam University, Gyeongsan, Republic of Korea
| |
Collapse
|
24
|
Hong SS, Bae J, Son LK, Kim K. Negative emotion can be “more negative” for those with high metacognitive abilities when problem-solving. Front Psychol 2023; 14:1110211. [PMID: 36998380 PMCID: PMC10043754 DOI: 10.3389/fpsyg.2023.1110211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 02/22/2023] [Indexed: 03/16/2023] Open
Abstract
IntroductionMetacognitive monitoring ability enables you to learn and solve problems more efficiently through appropriate strategies. At the same time, those who are high in monitoring ability are known to allocate more cognitive resources to the perception and control of negative emotions, as compared to those with low metacognitive ability. Therefore, while monitoring emotions may help reduce the negative emotion by enabling efficient control, it could also interrupt the use of an efficient strategy when problem-solving, as cognitive resources may be depleted.MethodsTo confirm this, we divided participants into groups with high and low monitoring abilities and manipulated emotions by presenting emotional videos. Subsequent to the manipulation, problem solving strategies were examined using items from the Cognitive Reflection Test (CRT).ResultsResults showed that those who were high in monitoring ability were shown to use more efficient problem-solving strategies than those who were lower in monitoring ability, but only in situations when positive or no emotions were manipulated. However, as hypothesized, when negative emotion was aroused, the CRT scores of high monitoring ability group were significantly lowered, decreasing to the same performance as those with low monitoring ability. We also found that metacognitive monitoring ability, when interacting with emotion, indirectly affected CRT scores, and that monitoring and control, when affected by emotion, were mediated in the process.DiscussionThese findings suggest a novel and complicated interaction between emotion and metacognition and warrant further research.
Collapse
Affiliation(s)
- Seok-sung Hong
- Social Science Institute, Ajou University, Suwon, Republic of Korea
- *Correspondence: Seok-sung Hong,
| | - Jinhee Bae
- Brain Science, Institute Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - Lisa K. Son
- Department of Psychology, Barnard College, Columbia University, New York, NY, United States
| | - Kyungil Kim
- Department of Psychology, Ajou University, Suwon, Republic of Korea
| |
Collapse
|
25
|
Choung Y, Pak TY. More than just a bad day? Traumatic life events and self-control in old age. PLoS One 2023; 18:e0266312. [PMID: 36753499 PMCID: PMC9907851 DOI: 10.1371/journal.pone.0266312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 01/26/2023] [Indexed: 02/09/2023] Open
Abstract
The behavioral economics literature suggests that exposure to traumatic events shifts preference features including risk aversion and time preference. In this study, we examined the association between traumatic life events and self-control in old age. Data were obtained from the Health and Retirement Study, which offers retrospective data on trauma exposure and early life characteristics. The results showed that experiences of serious physical attacks or assaults is associated with a 3.1% reduction in self-control, adjusted for demographic and childhood socioeconomic characteristics. The attacks or assaults were experienced approximately 30 years prior to the survey, indicating that traumatic life events exert a lasting influence on self-control. Further analyses found no difference in the association between the experience of serious physical attacks or assaults and self-control according to the timing of occurrence. Our findings are consistent with the evidence that experiences of natural disasters or armed conflicts increase impatience among survivors.
Collapse
Affiliation(s)
- Youngjoo Choung
- Department of Consumer Science, Inha University, Incheon, Republic of Korea
| | - Tae-Young Pak
- Department of Consumer Science and Convergence Program for Social Innovation, Sungkyunkwan University, Seoul, Republic of Korea
- * E-mail:
| |
Collapse
|
26
|
Abstract
The current guidelines for estimating reliability recommend using two omega combinations in multidimensional data. One omega is for factor analysis (FA) reliability estimators, and the other omega is for omega hierarchical estimators (i.e., ωh). This study challenges these guidelines. Specifically, the following three questions are asked: (a) Do FA reliability estimators outperform non-FA reliability estimators? (b) Is it always desirable to estimate ωh? (c) What are the best reliability and ωh estimators? This study addresses these issues through a Monte Carlo simulation of reliability and ωh estimators. The conclusions are given as follows. First, the performance differences among most reliability estimators are small, and the performance of FA estimators is comparable to that of non-FA estimators. However, the current, most-recommended estimators, that is, estimators based on the bifactor model and exploratory factor analysis, tend to overestimate reliability. Second, the accuracy of ωh estimators is much lower than that of reliability estimators, so we should perform ωh estimation selectively only on data that meet several requirements. Third, exploratory bifactor analysis is more accurate than confirmatory bifactor analysis only in the presence of cross-loading; otherwise, exploratory bifactor analysis is less accurate than confirmatory bifactor analysis. Fourth, techniques known to improve the Schmid-Leiman (SL) transformation are not superior to SL transformation but have different advantages. This study provides an R Shiny app that allows users to obtain multidimensional reliability and ωh estimates with a few mouse clicks. (PsycInfo Database Record (c) 2022 APA, all rights reserved).
Collapse
|
27
|
Hwang W, Fu X, Kim S, Jung E, Zhang Y. A multidimensional construct of helicopter parenting and college students' game and social media addictive behaviors: A cross-cultural study in South Korea and China. Front Psychol 2022; 13:1022914. [PMID: 36938126 PMCID: PMC10017490 DOI: 10.3389/fpsyg.2022.1022914] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 12/28/2022] [Indexed: 03/06/2023] Open
Abstract
Introduction We explored latent classes of helicopter parenting among Korean and Chinese college students. In addition, we examined whether these latent classes of helicopter parenting are related to Korean and Chinese students' game and social media addictive behaviors. Methods A three-step latent class analysis was conducted using 452 students from six universities in South Korea and 372 students from four universities in China. Results and discussion We identified four distinct helicopter parenting latent classes among the parents of Korean and Chinese students: weak, strong, academic management, and academic and schedule management. We also found that Korean students in the strong class reported significantly higher levels of game and social media addictive behaviors than those in the other three classes, but this did not hold for Chinese students. This finding indicates that the association between helicopter parenting and college students' game and social media addictive behaviors can be differentiated within Asian cultural contexts.
Collapse
Affiliation(s)
- Woosang Hwang
- Department of Human Development and Family Sciences, Texas Tech University, Lubbock, TX, United States
- *Correspondence: Woosang Hwang, ✉
| | - Xiaoyu Fu
- Department of Human Development and Family Science, Syracuse University, Syracuse, NY, United States
| | - Seonghee Kim
- Research Institute for Liberal Education, Yonsei University, Seoul, Republic of Korea
| | - Eunjoo Jung
- Department of Human Development and Family Science, Syracuse University, Syracuse, NY, United States
| | - Yue Zhang
- Department of Psychology, Santa Clara University, Santa Clara, CA, United States
| |
Collapse
|
28
|
Shim SY, Cho SJ, Park EA. Neurodevelopmental Outcomes at 18-24 Months of Corrected Age in Very Low Birth Weight Infants with Late-onset Sepsis. J Korean Med Sci 2021; 36:e205. [PMID: 34490752 PMCID: PMC8422039 DOI: 10.3346/jkms.2021.36.e205] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Accepted: 07/09/2021] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Preterm infants are prone to sepsis owing to their immature innate immunity and prolonged hospitalization. We aimed to evaluate the association between late-onset sepsis (LOS) during hospitalization and neurodevelopmental delay at 18-24 months of corrected age in very low birth weight infants (VLBWIs), and to ascertain this association when adjusted for perinatal risk factors. METHODS This is a population-based study of VLBWIs born at 23-32 weeks of gestation between January 2014 and December 2017 who were enrolled in the Korean Neonatal Network. Bayley scales of infant development were evaluated at 18-24 months of corrected age in 2,098 infants. To test for LOS as a risk factor for neurodevelopmental delay, multiple logistic regression was used and adjusted for parental education status and clinical variables. RESULTS Blood culture positive LOS was identified in 419 (20.0%) infants. Cognitive and motor delays were found in 392 (18.7%) and 347 (16.5%) infants, respectively. When multivariate analysis was performed, LOS had a significant association with cognitive delay (odds ratio, 1.48; 95% confidence interval, 1.02-2.16), but no association with motor delay in VLBWIs. Both delays were significantly more frequent in cases of intraventricular hemorrhage (IVH) ≥ grade 3, periventricular leukomalacia (PVL), and intrauterine growth restriction (IUGR) and duration of mechanical ventilation. Male sex and necrotizing enterocolitis ≥ grade 2 had an effect on motor delay, whereas paternal college graduation affected cognitive delay. CONCLUSION In VLBWIs with LOS, there is a heightened risk of cognitive delays at 18-24 months of corrected age. Brain injury, such as severe IVH and PVL, duration of mechanical ventilation, and IUGR, were also associated with cognitive and motor delays.
Collapse
Affiliation(s)
- So-Yeon Shim
- Division of Neonatology, Department of Pediatrics, Ewha Womans University College of Medicine, Seoul, Korea.
| | - Su Jin Cho
- Division of Neonatology, Department of Pediatrics, Ewha Womans University College of Medicine, Seoul, Korea
| | - Eun Ae Park
- Division of Neonatology, Department of Pediatrics, Ewha Womans University College of Medicine, Seoul, Korea
| |
Collapse
|
29
|
Lee JK, Bullen C, Ben Amor Y, Bush SR, Colombo F, Gaviria A, Karim SSA, Kim B, Lavis JN, Lazarus JV, Lo YC, Michie SF, Norheim OF, Oh J, Reddy KS, Rostila M, Sáenz R, Smith LDG, Thwaites JW, Were MK, Xue L. Institutional and behaviour-change interventions to support COVID-19 public health measures: a review by the Lancet Commission Task Force on public health measures to suppress the pandemic. Int Health 2021; 13:399-409. [PMID: 33974687 PMCID: PMC8136029 DOI: 10.1093/inthealth/ihab022] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 04/01/2021] [Accepted: 04/20/2021] [Indexed: 01/01/2023] Open
Abstract
The Lancet COVID-19 Commission Task Force for Public Health Measures to Suppress the Pandemic was launched to identify critical points for consideration by governments on public health interventions to control coronavirus disease 2019 (COVID-19). Drawing on our review of published studies of data analytics and modelling, evidence synthesis and contextualisation, and behavioural science evidence and theory on public health interventions from a range of sources, we outline evidence for a range of institutional measures and behaviour-change measures. We cite examples of measures adopted by a range of countries, but especially jurisdictions that have, thus far, achieved low numbers of COVID-19 deaths and limited community transmission of severe acute respiratory syndrome coronavirus 2. Finally, we highlight gaps in knowledge where research should be undertaken. As countries consider long-term measures, there is an opportunity to learn, improve the response and prepare for future pandemics.
Collapse
Affiliation(s)
- Jong-Koo Lee
- Seoul National UniversityCollege of Medicine, Seoul, 03080, Republic of Korea
- Department of Family Medicine, Seoul National University Hospital, Seoul, 03080, Republic of Korea
| | - Chris Bullen
- School of Population Health, University of Auckland, Auckland, 1142, New Zealand
| | - Yanis Ben Amor
- Center for Sustainable Development, Earth Institute, Columbia University, New York, 10115, USA
| | | | | | - Alejandro Gaviria
- School of Economics, Universidad de los Andes, Bogotá, 111711, Colombia
| | - Salim S Abdool Karim
- Centre for the AIDS Programme of Research in South Africa (CAPRISA), Private Bag X7, Congella, 4013, Durban, South Africa
- Department of Epidemiology, Mailman School of Public Health, New York, 10032, USA
| | - Booyuel Kim
- Department of Environmental Planning, Graduate School of Environmental Studies, Seoul National University, Seoul, 08826, Republic of Korea
- Environmental Planning Institute, Seoul National University, Seoul, 08826, Republic of Korea
| | - John N Lavis
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Ontario, L8S 4K1, Canada
| | - Jeffrey V Lazarus
- Barcelona Institute for Global Health (ISGlobal), Hospital Clínic, University of Barcelona, Barcelona, 08036, Spain
| | - Yi-Chun Lo
- Taiwan Centers for Disease Control, Taipei, 100, Taiwan
| | - Susan F Michie
- UCL Centre for Behaviour Change, Department of Clinical, Educational and Health Psychology, University College London, London WC1E 7HB, UK
| | - Ole F Norheim
- Department of Global Public Health and Primary Care, University of Bergen, Postboks 7804 NO-5020, Bergen, Norway
| | - Juhwan Oh
- Seoul National UniversityCollege of Medicine, Seoul, 03080, Republic of Korea
| | | | - Mikael Rostila
- Department of Public Health Sciences, Stockholm University, Stockholm, 10691, Sweden
| | - Rocío Sáenz
- School of Public Health, Universidad de Costa Rica, San Pedro Montes de Oca, San José, 11501, Costa Rica
| | - Liam D G Smith
- BehaviourWorks Australia, Monash University, Melbourne, 3800, Australia
| | - John W Thwaites
- Monash Sustainable Development Institute, Monash University, Melbourne, 3800, Australia
| | - Miriam K Were
- Champions of an AIDS-Free Generation in Africa, P.O. Box 63056 - 00200 Nairobi
| | - Lan Xue
- School of Public Policy and Management, Tsinghua University, Beijing, 100084, China
| | | |
Collapse
|
30
|
Abstract
Recent changes in the medical paradigm highlight the importance of patient-centered communication. However, because of the lack of awareness of dental clinics and competency of medical personnel, the quality of medical services in terms of the communication between doctors and patients has not improved. This study analyzed the impact of health communication and medical service quality, service value, and patient satisfaction on the intention to revisit dental clinics. The study participants were outpatients treated at 10 dental clinics in Seoul. The research data were collected using a questionnaire during visits to these dental clinics from December 1 to December 30, 2016. A total of 600 questionnaires were distributed (60 copies to each clinics) and 570 valid questionnaires were used for the analysis. The influence of the factors was determined using structural equation modeling. The factors influencing service value were reliability (β = 0.364, p < 0.001), expertise (β = 0.319, p < 0.001), communication by doctors (β = 0.224, p < 0.001), and tangibility (β = 0.136, p < 0.05). In addition, the factors influencing patient satisfaction were reliability (β = 0.258, p < 0.001), tangibility (β = 0.192, p < 0.001), communication by doctors (β = 0.163, p < 0.001), and expertise (β = 0.122, p < 0.01). Further, service value (β = 0.438, p < 0.001) raised patient satisfaction, which was found to influence the intention to revisit dental clinics (β = 0.383, p < 0.001). Providing accurate medical services to inpatients based on smooth communication between doctors and patients improves patient satisfaction. In addition, doctors can build long-term relations with patients by increasing patients’ intention to revisit through patient-oriented communication.
Collapse
Affiliation(s)
- Sewon Park
- Department of Medical Device Management and Research, SAIHST, Sungkyunkwan University, Seoul, South Korea
| | - Han-Kyoul Kim
- Department of Rehabilitation Medicine, Seoul National University Hospital, Seoul, South Korea
- National Traffic Injury Rehabilitation Research Institute, National Traffic Injury Rehabilitation Hospital, Yang-Pyeong, South Korea
| | - Mankyu Choi
- BK21 FOUR R&E Center for Learning Health Systems, Korea University, Seoul, South Korea
- Department of Health Policy & Management, College of Health Science, Korea University, Seoul, South Korea
- * E-mail: (MC); (ML)
| | - Munjae Lee
- Department of Medical Humanities and Social Medicine, Ajou University School of Medicine, Suwon, South Korea
- Medical Research Collaborating Center, Ajou Research Institute for Innovative Medicine, Ajou University Medical Center, Suwon, South Korea
- * E-mail: (MC); (ML)
| |
Collapse
|
31
|
Kim HK, Ahn J, Atkinson L, Kahlor LA. Effects of COVID-19 Misinformation on Information Seeking, Avoidance, and Processing: A Multicountry Comparative Study. Sci Commun 2020; 42:586-615. [PMID: 38603002 PMCID: PMC7492825 DOI: 10.1177/1075547020959670] [Citation(s) in RCA: 96] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
We examined the implications of exposure to misinformation about COVID-19 in the United States, South Korea, and Singapore in the early stages of the global pandemic. The online survey results showed that misinformation exposure reduced information insufficiency, which subsequently led to greater information avoidance and heuristic processing, as well as less systematic processing of COVID-19 information. Indirect effects differ by country and were stronger in the U.S. sample than in the Singapore sample. This study highlights negative consequences of misinformation during a global pandemic and addresses possible cultural and situational differences in how people interpret and respond to misinformation.
Collapse
Affiliation(s)
| | - Jisoo Ahn
- Hallym University, Chuncheon, Republic of Korea
| | | | | |
Collapse
|
32
|
Baek D, Kim WY, Cha JY, Park HJ, Shin G, Park J, Lim CJ, Chun HJ, Li N, Kim DH, Lee SY, Pardo JM, Kim MC, Yun DJ. The GIGANTEA-ENHANCED EM LEVEL Complex Enhances Drought Tolerance via Regulation of Abscisic Acid Synthesis. Plant Physiol 2020; 184:443-458. [PMID: 32690755 PMCID: PMC7479899 DOI: 10.1104/pp.20.00779] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 07/09/2020] [Indexed: 05/22/2023]
Abstract
Drought is one of the most critical environmental stresses limiting plant growth and crop productivity. The synthesis and signaling of abscisic acid (ABA), a key phytohormone in the drought stress response, is under photoperiodic control. GIGANTEA (GI), a key regulator of photoperiod-dependent flowering and the circadian rhythm, is also involved in the signaling pathways for various abiotic stresses. In this study, we isolated ENHANCED EM LEVEL (EEL)/basic Leu zipper 12, a transcription factor involved in ABA signal responses, as a GI interactor in Arabidopsis (Arabidopsis thaliana). The diurnal expression of 9-CIS-EPOXYCAROTENOID DIOXYGENASE 3 (NCED3), a rate-limiting ABA biosynthetic enzyme, was reduced in the eel, gi-1, and eel gi-1 mutants under normal growth conditions. Chromatin immunoprecipitation and electrophoretic mobility shift assays revealed that EEL and GI bind directly to the ABA-responsive element motif in the NCED3 promoter. Furthermore, the eel, gi-1, and eel gi-1 mutants were hypersensitive to drought stress due to uncontrolled water loss. The transcript of NCED3, endogenous ABA levels, and stomatal closure were all reduced in the eel, gi-1, and eel gi-1 mutants under drought stress. Our results suggest that the EEL-GI complex positively regulates diurnal ABA synthesis by affecting the expression of NCED3, and contributes to the drought tolerance of Arabidopsis.
Collapse
Affiliation(s)
- Dongwon Baek
- Division of Applied Life Science (BK21 PLUS), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 52828, Korea
| | - Woe-Yeon Kim
- Division of Applied Life Science (BK21 PLUS), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 52828, Korea
- Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Korea
| | - Joon-Yung Cha
- Division of Applied Life Science (BK21 PLUS), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 52828, Korea
- Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Korea
| | - Hee Jin Park
- Department of Biomedical Science and Engineering, Konkuk University, Seoul 05029, Korea
- Institute of Glocal Disease Control, Konkuk University, Seoul 05029, Korea
| | - Gilok Shin
- Department of Biomedical Science and Engineering, Konkuk University, Seoul 05029, Korea
| | - Junghoon Park
- Department of Biomedical Science and Engineering, Konkuk University, Seoul 05029, Korea
| | - Chae Jin Lim
- Department of Biomedical Science and Engineering, Konkuk University, Seoul 05029, Korea
| | - Hyun Jin Chun
- Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Korea
| | - Ning Li
- State Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha 410004, China
| | - Doh Hoon Kim
- College of Life Science and Natural Resources, Dong-A University, Busan 49315, Korea
| | - Sang Yeol Lee
- Division of Applied Life Science (BK21 PLUS), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 52828, Korea
| | - Jose M Pardo
- Instituto de Bioquímica Vegetal y Fotosíntesis, cicCartuja, CSIC-Universidad de Sevilla, Sevilla 41092, Spain
| | - Min Chul Kim
- Division of Applied Life Science (BK21 PLUS), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 52828, Korea
| | - Dae-Jin Yun
- Department of Biomedical Science and Engineering, Konkuk University, Seoul 05029, Korea
- Institute of Glocal Disease Control, Konkuk University, Seoul 05029, Korea
| |
Collapse
|
33
|
Foroozani M, Zahraeifard S, Oh DH, Wang G, Dassanayake M, Smith AP. Low-Phosphate Chromatin Dynamics Predict a Cell Wall Remodeling Network in Rice Shoots. Plant Physiol 2020; 182:1494-1509. [PMID: 31857425 PMCID: PMC7054884 DOI: 10.1104/pp.19.01153] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 12/06/2019] [Indexed: 05/20/2023]
Abstract
Phosphorus (P) is an essential plant macronutrient vital to fundamental metabolic processes. Plant-available P is low in most soils, making it a frequent limiter of growth. Declining P reserves for fertilizer production exacerbates this agricultural challenge. Plants modulate complex responses to fluctuating P levels via global transcriptional regulatory networks. Although chromatin structure plays a substantial role in controlling gene expression, the chromatin dynamics involved in regulating P homeostasis have not been determined. Here we define distinct chromatin states across the rice (Oryza sativa) genome by integrating multiple chromatin marks, including the H2A.Z histone variant, H3K4me3 modification, and nucleosome positioning. In response to P starvation, 40% of all protein-coding genes exhibit a transition from one chromatin state to another at their transcription start site. Several of these transitions are enriched in subsets of genes differentially expressed under P deficiency. The most prominent subset supports the presence of a coordinated signaling network that targets cell wall structure and is regulated in part via a decrease of H3K4me3 at transcription start sites. The P starvation-induced chromatin dynamics and correlated genes identified here will aid in enhancing P use efficiency in crop plants, benefitting global agriculture.
Collapse
Affiliation(s)
- Maryam Foroozani
- Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana 70803
| | - Sara Zahraeifard
- Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana 70803
| | - Dong-Ha Oh
- Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana 70803
| | - Guannan Wang
- Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana 70803
| | - Maheshi Dassanayake
- Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana 70803
| | - Aaron P Smith
- Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana 70803
| |
Collapse
|