1
|
Jeong YH, Choi SH, Banjade M, Jin SD, Park SM, Kunwar B, Oh HS. Spatiotemporal Niche Separation among Passeriformes in the Halla Mountain Wetland of Jeju, Republic of Korea: Insights from Camera Trap Data. Animals (Basel) 2024; 14:724. [PMID: 38473109 DOI: 10.3390/ani14050724] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 02/13/2024] [Accepted: 02/21/2024] [Indexed: 03/14/2024] Open
Abstract
This study analyzed 5322 camera trap photographs from Halla Mountain Wetland, documenting 1427 independent bird sightings of 26 families and 49 species of Passeriformes. Key observations include morning activities in Cyanoptila cyanomelana and Horornis canturians and afternoon activity in Muscicapa dauurica and Phoenicurus auroreus. Wetlands were significantly preferred (P_i = 0.398) despite their smaller area, contrasting with underutilized grasslands (P_i = 0.181). Seasonal activity variations were notable, with overlap coefficients ranging from 0.08 to 0.81 across species, indicating diverse strategies in resource utilization and thermoregulation. Population density was found to be a critical factor in habitat usage, with high-density species showing more consistent activity patterns. The study's results demonstrate the ecological adaptability of Passeriformes in the Halla Mountain Wetland while highlighting the limitations of camera trapping methods. These limitations include their fixed field of view and intermittent recording capability, which may not fully capture the spectrum of complex avian behaviors. This research underlines the need for future studies integrating various methodologies, such as direct observation and acoustic monitoring, to gain a more comprehensive understanding of avian ecology.
Collapse
Affiliation(s)
- Young-Hun Jeong
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju-si 63243, Jeju-do, Republic of Korea
| | - Sung-Hwan Choi
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju-si 63243, Jeju-do, Republic of Korea
| | - Maniram Banjade
- National Institute of Ecology, 1210 Geumgang-ro, Maseru-myeon, Seocheon-gun 33657, Chungcheongnam-do, Republic of Korea
| | - Seon-Deok Jin
- National Institute of Ecology, 1210 Geumgang-ro, Maseru-myeon, Seocheon-gun 33657, Chungcheongnam-do, Republic of Korea
| | - Seon-Mi Park
- Research Institute for Basic Sciences, Jeju National University, Jeju-si 63243, Jeju-do, Republic of Korea
| | - Binod Kunwar
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju-si 63243, Jeju-do, Republic of Korea
| | - Hong-Shik Oh
- Faculty of Science Education, Jeju National University, Jeju-si 63243, Jeju-do, Republic of Korea
| |
Collapse
|
2
|
Banjade M, Jeong YH, Jin SD, Son SH, Kunwar A, Park SM, Lee JW, Choi SH, Oh HS. Spatiotemporal overlap between Siberian roe deer ( Capreolus pygargus tianschanicus) and sympatric mammalian species on Jeju Island, South Korea. MAMMALIA 2022. [DOI: 10.1515/mammalia-2022-0059] [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: 12/24/2022]
Abstract
Abstract
Analysis of spatiotemporal partitioning is pivotal to shed light on interspecific coexistence. Most research efforts have involved large-sized carnivores and their prey species, whereas little attention has been given to ungulate in the predator-free ecosystems. We assessed seasonal activity patterns and spatiotemporal overlap among the Siberian roe deer (Capreolus pygargus tianschanicus) and its sympatric species through camera-trapping from October 2017 and September 2020 in Jeju Island, South Korea. Trap events when compared seasonally, roe deer show higher activity in summer (34.9%), a pronounced low in winter (14.1%), and a moderate in autumn (23.8%) and in spring (26.9%). Roe deer exhibited bimodal activity patterns and had the highest spatiotemporal overlap and composite score with sika deer (Cervus nippon). Our results are among the few available data on the interaction of sympatric species and suggest strong overlapping with sika deer. This study provides important insight into species coexistence in predator-free habitats, which would be important for management initiatives.
Collapse
Affiliation(s)
- Maniram Banjade
- Practical Translational Research Center , Jeju National Univeristy , Jeju-si , South Korea
| | - Young-Hun Jeong
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science , Jeju National University , Jeju 63243 , South Korea
| | - Seon-Deok Jin
- National Institute of Ecology , Seocheon-gun Chungnam 33657 , South Korea
| | - Se Hwan Son
- National Institute of Ecology , Seocheon-gun Chungnam 33657 , South Korea
| | - Amar Kunwar
- Community Ecology and Conservation, Xishuangbanna Tropical Botanical Garden , Chinese Academy of Science , Beijing , P. R. China
| | - Seon-Mi Park
- Practical Translational Research Center , Jeju National Univeristy , Jeju-si , South Korea
| | - Jun-Won Lee
- Faculty of Science Education , Jeju National University , Jeju 63243 , South Korea
| | - Sung-Hwan Choi
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science , Jeju National University , Jeju 63243 , South Korea
| | - Hong-Shik Oh
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science , Jeju National University , Jeju 63243 , South Korea
- Faculty of Science Education , Jeju National University , Jeju 63243 , South Korea
| |
Collapse
|
3
|
Song HG, Ahn JH, Koh JS, Bae JS, Park YW, Hwang SJ, Hwang JY, Jeong YH. Prognostic implication of residual inflammatory risk according to disease status in patients treated with percutaneous coronary intervention. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1289] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Compared with stable angina, acute myocardial infarction (AMI) phenotype is related with the elevated inflammatory activity. However, time-dependent change of inflammatory level and its prognostic implication has not been fully understood according to the disease entity.
Methods
We enrolled total 4,263 patients who underwent percutaneous coronary intervention (PCI) with serial measurement of high-sensitivity C-reactive protein (hsCRP) at on-admission and 1-month post-PCI. The risks of MACE (a composite of death, MI or stroke), and major bleeding were evaluated up to 4 years after procedure.
Results
Compared with the non-AMI group (n=1,887), the AMI group (n=2,376) showed the significant decrease of hs-CRP during 1 month (∇0.5 vs. ∇0.1 mg/L; P<0.001). However, 1-month hs-CRP value still was higher in the AMI group than in the non-AMI group (median: 1.0 vs. 0.9 mg/L; P=0.001). During 1-month follow-up, high vs. low inflammatory risk (upper vs. lower tertile of hs-CRP) was significantly associated with increased rate of MACE in the AMI group (HR: 7.66; 95% CI: 2.29–25.59; P<0.001), but not in the non-AMI group (HR: 0.74; 95% CI: 0.12–4.40; P=0.736). From 1-month to 4-years, patients with high inflammatory risk showed the greater rate of MACE compared to those with low inflammatory risk, in both the AMI (HR: 2.40; 95% CI: 1.73–3.45; P<0.001) and non-AMI (HR: 2.67; 95% CI: 1.80–3.94; P<0.001) groups.
Conclusion
In PCI-treated patients, patients presented with AMI showed the greater values of inflammatory activity and its prognostic implication during the early phase, but combined inflammatory risk appeared similar across the disease entity during the late phase. This result may support that clinical benefit of post-PCI anti-inflammatory treatment would be constant regardless of the disease entity during the stabilized phase.
Funding Acknowledgement
Type of funding sources: None.
Collapse
Affiliation(s)
- H G Song
- Department of Cardiology, Heart-Brain Hospital, Chung-Ang University Gwang-Myeong Medical Center , Gwang-Myeong , Korea (Republic of)
| | - J H Ahn
- Cardiovascular Center, Gyeongsang National University Changwon Hospital , Changwon , Korea (Republic of)
| | - J S Koh
- Cardiovascular Center, Gyeongsang National University Hospital , Jin-Ju , Korea (Republic of)
| | - J S Bae
- Cardiovascular Center, Gyeongsang National University Changwon Hospital , Changwon , Korea (Republic of)
| | - Y W Park
- Cardiovascular Center, Gyeongsang National University Changwon Hospital , Changwon , Korea (Republic of)
| | - S J Hwang
- Cardiovascular Center, Gyeongsang National University Hospital , Jin-Ju , Korea (Republic of)
| | - J Y Hwang
- Cardiovascular Center, Gyeongsang National University Hospital , Jin-Ju , Korea (Republic of)
| | - Y H Jeong
- Department of Cardiology, Heart-Brain Hospital, Chung-Ang University Gwang-Myeong Medical Center , Gwang-Myeong , Korea (Republic of)
| |
Collapse
|
4
|
Park JS, Jeong YH. Clinical significance of time-varying on-treatment platelet reactivity after percutaneous coronary intervention. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1397] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Objectives
This study aimed to determine the prognostic value of serial measurement of platelet reactivity (PR) using the VerifyNow, P2Y12 reaction unit (PRU) assay following percutaneous coronary intervention (PCI) during antiplatelet therapy.
Background
On-treatment PR changes over time, but the prognostic value of serial PR measurements has not been defined.
Methods
We enrolled 3204 patients who had PCI and who were measured at PCI and 1 month. We constructed regular and time-dependent Cox proportional hazard models to compare the prognostic value between baseline and serial FU of PR on a primary endpoint of cardiovascular death, myocardial infarction (MI) or stroke over a three-year period.
Results
Time-varying PR and baseline PR were both associated with an increased risk of the primary endpoint, but the duration of association with primary endpoint differed. The prognostic value of time-varying PR (adjusted hazard ratio (HR) 1.008, 95% confidence interval (CI) 1.005–1.011, p=0.001) was rapidly decreased until 3 month and no prognostic value of time-varying PR after 3 month (adjusted HR 0.999, 95% CI 0.997–1.002, p=0.683). Baseline PR was associated with an increased risk of primary endpoint upto 1 year (adjusted HR 1.005, 95% CI 1.003–1.008, p<0.001) and no prognostic value of baseline PR after 1 year (adjusted HR 0.999, 95% CI 0.997–1.002, p=0.827) was not noted, which showed more slow reduction of the prognostic value of baseline PR.
Conclusions
Time-varying on-treatment PR reflects more real-world clinical practice. The prognostic value of PR decreased rapidly after PCI and we have to be cautious to use of single time point for the prediction of clinical event using on-treatment PR.
Funding Acknowledgement
Type of funding sources: None.
Collapse
Affiliation(s)
- J S Park
- Pusan National University Hospital , Pusan , Korea (Republic of)
| | - Y H Jeong
- Chung-Ang University Gwangmyeong Hospital, Chung-Ang University School of Medicine, CAU Thrombosis and Biomarker Center , Gwangmyeong , Korea (Republic of)
| |
Collapse
|
5
|
Jeong YH, Choi SH, Banjade M, Park SM, Lee JW, Oh HS. First breeding records of the osprey (Pandion haliaetus) on Jeju Island, South Korea. Journal of Asia-Pacific Biodiversity 2022. [DOI: 10.1016/j.japb.2022.10.002] [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: 11/07/2022] Open
|
6
|
Oh E, Kang JH, Jo KW, Shin WS, Jeong YH, Kang B, Rho TY, Jeon SY, Lee J, Song IS, Kim KT. Synthetic PPAR Agonist DTMB Alleviates Alzheimer's Disease Pathology by Inhibition of Chronic Microglial Inflammation in 5xFAD Mice. Neurotherapeutics 2022; 19:1546-1565. [PMID: 35917087 PMCID: PMC9606171 DOI: 10.1007/s13311-022-01275-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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] [Subscribe] [Scholar Register] [Accepted: 07/06/2022] [Indexed: 12/05/2022] Open
Abstract
Abnormal productions of amyloid beta (Aβ) plaque and chronic neuroinflammation are commonly observed in the brain of patients with Alzheimer's disease, and both of which induce neuronal cell death, loss of memory, and cognitive dysfunction. However, many of the drugs targeting the production of Aβ peptides have been unsuccessful in treating Alzheimer's disease. In this study, we identified synthetic novel peroxisome proliferator-activating receptor (PPAR) agonist, DTMB, which can ameliorate the chronic inflammation and Aβ pathological progression of Alzheimer's disease. We discovered that DTMB attenuated the proinflammatory cytokine production of microglia by reducing the protein level of NF-κB. DTMB also improved the learning and memory defects and reduced the amount of Aβ plaque in the brain of 5xFAD mice. This reduction in Aβ pathology was attributed to the changes in gliosis and chronic inflammation level. Additionally, bulk RNA-sequencing showed that genes related to inflammation and cognitive function were changed in the hippocampus and cortex of DTMB-treated mice. Our findings demonstrate that DTMB has the potential to be a novel therapeutic agent for Alzheimer's disease.
Collapse
Affiliation(s)
- Eunji Oh
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-gu, Pohang, 790-784 Republic of Korea
| | - Jeong-Hwa Kang
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-gu, Pohang, 790-784 Republic of Korea
| | - Kyung Won Jo
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-gu, Pohang, 790-784 Republic of Korea
| | - Won-Sik Shin
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-gu, Pohang, 790-784 Republic of Korea
| | - Young-Hun Jeong
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-gu, Pohang, 790-784 Republic of Korea
| | - Byunghee Kang
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-gu, Pohang, 790-784 Republic of Korea
| | - Tae-Young Rho
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-gu, Pohang, 790-784 Republic of Korea
| | - So Yeon Jeon
- College of Pharmacy, Dankook University, Cheonan, 31116 Republic of Korea
| | - Jihoon Lee
- College of Pharmacy, Kyungpook National University, Daegu, 41566 Republic of Korea
| | - Im-Sook Song
- College of Pharmacy, Kyungpook National University, Daegu, 41566 Republic of Korea
| | - Kyong-Tai Kim
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-gu, Pohang, 790-784 Republic of Korea
| |
Collapse
|
7
|
Kang MG, Kim KH, Park HW, Koh JS, Park JR, Park YH, Hwang SJ, Jeong YH, Kwak CH, Ahn JH, Song HN, Hwang JY. Impact of active and stable cancer on survival in patients undergoing percutaneous coronary intervention. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.2858] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
With advances in treatment of ischemic heart disease and cancer treatment, use of percutaneous coronary intervention (PCI) in cancer survivors and patients with active cancer (AC) is expanding.
Objectives
The purpose of this study was to determine the impact of cancer on survival and major cardiovascular events (MACE) in a long-term, single-center cohort of patients treated with PCI.
Methods
Patients treated with PCI between January 2010 and December 2017 were grouped as follows: controls (patients without cancer), stable cancer (SC), and AC. AC was included patients with cancer diagnosed within the past 6 months, patients who had cancer-related therapy within the past 6 months, active metastatic disease, or active recurrence of the cancer. The primary endpoints were 5-year survival and a secondary endpoint was 5-year MACE.
Results
A total of 6,743 patients (age 66±12 years, 68.4% men) treated with PCI were included: 6,404 (95.0%) controls, 245 (3.6%) SC, and 94 (1.4%) AC. Predominant malignancies were gastrointestinal (37.4%), lung (22.7%), and genitourinary cancer (14.7%). No differences were observed between patients with AC, SC and controls regarding 5-year MACE (total MACE, 33.2% vs. 28.1% vs. 17.5%, p=0.072; cardiac death, 13.6% vs. 9.1% vs. 6.7%, p=0.066; non-fatal myocardial infarction, 2.9% vs. 7.5% vs. 7.8%, p=0.820; revascularization, 17.9% vs. 17.6% vs. 11.6%, p=0.794, respectively). Patients with AC and SC had reduced 5-year survival compared with controls (62.0% vs. 81.5% vs. 89.8%, p<0.001) (Figure). AC was associated with a 1.76 (95% CI 1.22 to 2.54, p=0.002) fold increased risk of all-cause 5-year mortality in multivariable adjusted models.
Conclusions
Cumulative incidence of 5-year survival was discriminated by concurrent status of cancer following PCI. Individualized decision making is needed in the routine practice of PCI regarding concurrent cancer-specific treatment and prognosis.
Funding Acknowledgement
Type of funding sources: None.
Collapse
Affiliation(s)
- M G Kang
- Gyeongsang National University Hospital, Jinju, Korea (Republic of)
| | - K H Kim
- Gyeongsang National University Hospital, Cardiology, Jinju, Korea (Republic of)
| | - H W Park
- Gyeongsang National University Hospital, Cardiology, Jinju, Korea (Republic of)
| | - J S Koh
- Gyeongsang National University Hospital, Cardiology, Jinju, Korea (Republic of)
| | - J R Park
- Gyeongsang National University Hospital, Cardiology, Jinju, Korea (Republic of)
| | - Y H Park
- Gyeongsang National University Changwon Hospital, Changwon, Korea (Republic of)
| | - S J Hwang
- Gyeongsang National University Hospital, Cardiology, Jinju, Korea (Republic of)
| | - Y H Jeong
- Gyeongsang National University Changwon Hospital, Changwon, Korea (Republic of)
| | - C H Kwak
- Gyeongsang National University Changwon Hospital, Changwon, Korea (Republic of)
| | - J H Ahn
- Gyeongsang National University Changwon Hospital, Changwon, Korea (Republic of)
| | - H N Song
- Gyeongsang National University Hospital, Jinju, Korea (Republic of)
| | - J Y Hwang
- Gyeongsang National University Hospital, Cardiology, Jinju, Korea (Republic of)
| |
Collapse
|
8
|
Jang JY, Ahn JH, Bae JS, Kang MG, Kim K, Park HW, Koh JS, Park Y, Hwang SJ, Kwak CH, Hwang JY, Jeong YH. P3637Relationship between serial measurements of NT-proBNP and cardiovascular events in patients with acute coronary syndrome. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.0494] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Increased level of natriuretic peptides has been known as an important predictors of adverse cardiovascular (CV) outcomes in patients with acute coronary syndrome (ACS). We sought to evaluate clinical implication of N-terminal pro-brain natriuretic peptide (NT-proBNP) measured at initial and follow-up periods.
Methods
Serial NT-proBNP levels (on-admission and one-month post-PCI) were measured in ACS patients undergoing PCI (n=2,290). High NT-proBNP levels were determined according to the predefined age-specific criteria. Patients were stratified into 4 groups according to NT-proBNP levels (on-admission & one-month): (1) normal-normal group (n=1234, 53.9%); (2) high–normal group (n=257, 11.2%); (3) normal-high group (n=376, 16.4%); and (4) high-high group (n=423, 18.5%). Clinical events were defined as all-cause death and MACE (a composite of CV death, non-fatal MI, and ischemic stroke).
Results
With a median follow-up of 35.9 (IQR: 16.8, 54.5) months, all-cause death and MACE were occurred in 4.1% and 7.2%, respectively. NT-proBNP on-admission vs. at one-month did not differ significantly (median 391.6 [IQR: 143.9, 1402.3] vs. median 619.1 [IQR 240.1, 1616.1]; p=0.622), but the prevalence of high NT-proBNP was increased over time (25.3% to 34.9%; p<0.001). The rates of all-cause death and MACE significantly increased only in the high-high group compared with other groups (log-rank test, all p values <0.001, Figure). After adjustment, the high-high group remained significantly risky in terms with the occurrence of all-cause death (HR, 2.99; 95% CI, 1.65 to 5.41; p<0.001) and MACE (HR, 1.96; 95% CI, 1.28 to 3.01; p=0.002).
Figure 1
Conclusion
Serial measurements of NT-proBNP at on-admission and follow-up can help to stratify the risks of all-cause death and adverse CV events following PCI in ACS patients. About two-fifths of patients having high NT-proBNP level during hospitalization can be classified into the low-risk group for all-cause death and adverse CV events.
Acknowledgement/Funding
None
Collapse
Affiliation(s)
- J Y Jang
- Gyeongsang National University Changwon Hospital, Internal Medicine, Changwon, Korea (Republic of)
| | - J H Ahn
- Gyeongsang National University Changwon Hospital, Internal Medicine, Changwon, Korea (Republic of)
| | - J S Bae
- Gyeongsang National University Changwon Hospital, Internal Medicine, Changwon, Korea (Republic of)
| | - M G Kang
- Gyeongsang National University Hospital, Internal Medicine, Jinju, Korea (Republic of)
| | - K Kim
- Gyeongsang National University Hospital, Internal Medicine, Jinju, Korea (Republic of)
| | - H W Park
- Gyeongsang National University Hospital, Internal Medicine, Jinju, Korea (Republic of)
| | - J S Koh
- Gyeongsang National University Hospital, Internal Medicine, Jinju, Korea (Republic of)
| | - Y Park
- Gyeongsang National University Changwon Hospital, Internal Medicine, Changwon, Korea (Republic of)
| | - S J Hwang
- Gyeongsang National University Hospital, Internal Medicine, Jinju, Korea (Republic of)
| | - C H Kwak
- Gyeongsang National University Changwon Hospital, Internal Medicine, Changwon, Korea (Republic of)
| | - J Y Hwang
- Gyeongsang National University Hospital, Internal Medicine, Jinju, Korea (Republic of)
| | - Y H Jeong
- Gyeongsang National University Changwon Hospital, Internal Medicine, Changwon, Korea (Republic of)
| |
Collapse
|
9
|
Abstract
We investigate the properties of the gap-edge states of half-filled interacting disordered zigzag graphene nanoribbons, and find that the midgap states can display a quantized fractional charge of 1/2. These gap-edge states can be represented by topological kinks with their site probability distribution divided between the left and right zigzag edges with different chiralities. In addition, there are numerous spin-split gap-edge states, similar to those in a Mott-Anderson insulator.
Collapse
Affiliation(s)
- Y H Jeong
- Department of Physics, Korea University, Seoul, Republic of Korea
| | | | | |
Collapse
|
10
|
Kim JH, Baik SH, Song JY, Bae IG, Kim HY, Kim DM, Choi YH, Choi WS, Jeong YH, Kwon HH, Jeong HW, Kim YS, Kim JY, Lee J, Kee SY, Chung JW, Nahm MH, Kim MJ. 1003. Clinical Implications of Emerging Nonvaccine-Serotype Invasive Pneumococcal Disease Among Adults in the Republic of Korea in the Era of Protein-Conjugated Pneumococcal Vaccine. Open Forum Infect Dis 2018. [PMCID: PMC6253861 DOI: 10.1093/ofid/ofy210.840] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Background In the Republic of Korea (ROK), protein conjugated vaccines (PCV13 and PCV10) in replacement of PCV7 have been used in children since 2010, and then included in the childhood national immunization program (NIP) in 2014. This study investigated indirect effect of PVCs on serotypes in PCV-naïve adult invasive pneumococcal disease (IPD) and its clinical implications. Methods A prospective observational cohort study was conducted, through the serotype surveillance program following the NIP implementation of 23-valent pneumococcal polysaccharide vaccine (PPV23) for elderly population (≥65 years) from 2013 to 2015. Clinical data and pneumococcal isolates from adult IPD patients (≥18 years) were collected from 20 hospitals. Clinical characteristics were compared between vaccine-serotype (VT) and nonvaccine-serotype (NVT) groups. Results Of a total of 319 IPD patients enrolled, 189 cases (59.2%) were available for serotypes. Among them, the proportion of PCV-naïve cases was 99.5% (188/189) and 189 patients consisted of NVT (n = 64, 33.9%) and VT group (n = 125, 66.1%). Compared with the previous study in the ROK (2004–2010), the proportion of PCV13 serotypes was decreased (61.4% vs. 37.0%, P < 0.001) and PPV23 serotypes were stationary (71.5% vs. 65.6%), but NVT serotypes were increased (23.4% vs. 33.9%, P = 0.033) in our study. The most common serotype was 3 (20.8%) and 34 (23.4%) in VT and NVT group, respectively. VT group had more bacteremic pneumonia (72.0% vs. 48.4%, P = 0.002). There was no difference of the case fatality rate between NVT and VT groups (29.7% vs. 35.2%, P = 0.447). Multiple logistic regression analysis showed that chronic kidney disease (odds ratio [OR] 10.26, 95% confidence interval [CI] 1.94–54.44, P = 0.006), younger age of 18–49 years (OR 4.04, 95% CI 1.29–12.71, P = 0.017), deep-seated infection (OR 3.73, 95% CI 1.34–10.39, P = 0.012), meropenem resistance (OR 3.21, 95% CI 1.49–6.91, P = 0.003) were significantly associated with NVT-IPD cases. Conclusion Our study indicates that emerging and expanding NVT-IPD among adults, probably due to indirect herd effect of widespread use of pediatric PCV. Further changes of IPD serotypes might occur and IPD serotypes should be monitored for developing better pneumococcal vaccination policy. Disclosures All authors: No reported disclosures.
Collapse
Affiliation(s)
- Jong Hun Kim
- Division of Infectious Diseases, Korea University College of Medicine, Seoul, Korea, Republic of (South)
| | - Seung Hee Baik
- Cheju Halla General Hospital, Jeju-si, Korea, Republic of (South)
| | - Joon Young Song
- Korea University College of Medicine, Seoul, Korea, Republic of (South)
| | - In-Gyu Bae
- Gyeongsang National University Hospital, Jinju, Korea, Republic of (South)
| | - Hyo Youl Kim
- Division of Infectious Diseases, Yonsei University Wonju College of Medicine, Wonju, Korea, Republic of (South)
| | - Dong-Min Kim
- School of Medicine, Chosun University, gwang ju, Korea, Republic of (South)
| | - Young Hwa Choi
- Department of Infectious Diseases, Ajou University School of Medicine, Suwon, Korea, Republic of (South)
| | - Won Suk Choi
- Korea University College of Medicine, Seoul, Korea, Republic of (South)
| | - Y H Jeong
- Konyang University Hospital, Daejon, Korea, Republic of (South)
| | - Hyun Hee Kwon
- Infectious Disease, Catholic University of Daegu School of Medicine, Daegu, Korea, Republic of (South)
| | - Hye Won Jeong
- Department of Internal Medicine, Chungbuk National University College of Medicine, Cheongju, Korea, Republic of (South)
| | - Yeon-Sook Kim
- Chungnam National University School Of Medicine, Daejon, Korea, Republic of (South)
| | - Jeong Yeon Kim
- Sahmyook Medical Center, Seoul, Korea, Republic of (South)
| | - Jacob Lee
- Department of Internal Medicine, Hallym University Medical Center, Seoul, Korea, Republic of (South)
| | - Sae Yoon Kee
- Keonkuk University Hospital, Chungju, Korea, Republic of (South)
| | - Jin-Won Chung
- Department of Internal Medicine, Chung-Ang University Medical Center, Seoul, Korea, Republic of (South)
| | - Moon H Nahm
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Min-Ja Kim
- Division of Infectious Disease, Depart of Internal Medicine, Korea University Medical Center, Seoul, Korea, Republic of (South)
| |
Collapse
|
11
|
Kim JH, Chun BC, Song JY, Kim HY, Bae IG, Kim DM, Choi WS, Jeong YH, Choi YH, Kang SH, Yoon YK, Sohn JW, Kim MJ. 744. Effectiveness of 23-Valent Pneumococcal Polysaccharide Vaccine and Influenza Vaccine Against Pneumococcal Pneumonia Among Elderly Patients Aged 65 Years and Older in the Republic of Korea: A Case–Control Study. Open Forum Infect Dis 2018. [PMCID: PMC6255674 DOI: 10.1093/ofid/ofy210.751] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Background The national immunization program (NIP) of annual influenza vaccination to the elderly population (≥65 years of age) in the Republic of Korea (ROK) has been implemented since 1987. Recently, the 23-valent pneumococcal polysaccharide vaccine (PPV23) through the NIP has been provided to the elderly population in the ROK since May 2013. The aim of this study was to assess PPV23 and influenza vaccine (IV) effectiveness in preventing pneumococcal pneumonia (PP) among elderly patients ≥65 years of age. Methods A case–control study using a hospital-based cohort was conducted. Cases of PP including bacteremic PP and nonbacteremic PP were collected from 14 hospitals in the pneumococcal diseases surveillance program from March 2013 to October 2015. Controls matched by age and sex in the same hospital were selected. Demographic, clinical information, and vaccination histories were collected. Previous immunization was categorized into “vaccinated” if a patient had received vaccines as follows: PPV23 (4 weeks to 5 years) and IV (2 weeks to 6 months) prior to the diagnosis of PP for case patients and prior to the hospital admission for control patients. Adjusted odds ratio (OR) was calculated, controlling for underlying medical conditions. Vaccine effectiveness was defined as (1 – OR) × 100. Results During the study period, a total of 661 cases (104 bacteremic PP cases and 557 nonbacteremic PP cases) and 661 controls were enrolled for analyses. For overall patients ≥65 years of age, there was no significant vaccine effectiveness against PP. For young elderly patients with 65–74 years, IV alone (1.2%, [95% confidence interval (CI) −95.3% to 50.0%]) and PPV23 alone (21.9%, [95% CI −39.0% to 56.1%]) were not effective. However, significant vaccine effectiveness of PPV23 plus IV against PP was noted (54.4%, [95% CI 6.9–77.7%], P = 0.031). For older elderly patients ≥75 years of age, no significant vaccine effectiveness was observed. Conclusion Our study indicates that PPV23 plus IV may be effective in preventing PP among young elderly patients with 65–74 years, suggesting additive benefits of influenza plus PPV23 vaccination. Further studies are required to confirm the persistent additive protective effectiveness. Disclosures All authors: No reported disclosures.
Collapse
Affiliation(s)
- Jong Hun Kim
- Division of Infectious Diseases, Korea University College of Medicine, Seoul, Korea, Republic of (South)
| | - Byung Chul Chun
- Preventive Medicine, Korea University Coll. of Med., Seoul, Korea, Republic of (South)
| | - Joon Young Song
- Korea University College of Medicine, Seoul, Korea, Republic of (South)
| | - Hyo Youl Kim
- Division of Infectious Diseases, Yonsei University Wonju College of Medicine, Wonju, Korea, Republic of (South)
| | - In-Gyu Bae
- Gyeongsang National University Hospital, Jinju, Korea, Republic of (South)
| | - Dong-Min Kim
- School of Medicine, Chosun University, Gwang Ju, Korea, Republic of (South)
| | - Won Suk Choi
- Korea University College of Medicine, Seoul, Korea, Republic of (South)
| | - Y H Jeong
- Konyang University Hospital, Daejon, Korea, Republic of (South)
| | - Young Hwa Choi
- Department of Infectious Diseases, Ajou University School of Medicine, Suwon, Korea, Republic of (South)
| | - Seong Hui Kang
- Konyang University Hospital, Daejon, Korea, Republic of (South)
| | - Young Kyung Yoon
- Division of Infectious Disease, Depart of Internal Medicine, Korea University Medical Center, Seoul, Korea, Republic of (South)
| | - Jang-Wook Sohn
- Division of Infectious Disease, Depart of Internal Medicine, Korea University Medical Center, Seoul, Korea, Republic of (South)
| | - Min-Ja Kim
- Division of Infectious Disease, Depart of Internal Medicine, Korea University Medical Center, Seoul, Korea, Republic of (South)
| |
Collapse
|
12
|
Jeong YH, Choi JH, Lee D, Kim S, Kim KT. Vaccinia-related kinase 2 modulates role of dysbindin by regulating protein stability. J Neurochem 2018; 147:609-625. [PMID: 30062698 DOI: 10.1111/jnc.14562] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 05/29/2018] [Revised: 07/13/2018] [Accepted: 07/24/2018] [Indexed: 12/23/2022]
Abstract
Vaccinia-related kinase 2 (VRK2) is a serine/threonine kinase that belongs to the casein kinase 1 family. VRK2 has long been known for its relationship with neurodegenerative disorders such as schizophrenia. However, the role of VRK2 and the substrates associated with it are unknown. Dysbindin is known as one of the strong risk factors for schizophrenia. The expression of dysbindin is indeed significantly reduced in schizophrenia patients. Moreover, dysbindin is involved in neurite outgrowth and regulation of NMDA receptor signaling. Here, we first identified dysbindin as a novel interacting protein of VRK2 through immunoprecipitation. We hypothesized that dysbindin is phosphorylated by VRK2 and further that this phosphorylation plays an important role in the function of dysbindin. We show that VRK2 phosphorylates Ser 297 and Ser 299 of dysbindin using in vitro kinase assay. In addition, we found that VRK2-mediated phosphorylation of dysbindin enhanced ubiquitination of dysbindin and consequently resulted in the decrease in its protein stability through western blotting. Over-expression of VRK2 in human neuroblastoma (SH-SY5Y) cells reduced neurite outgrowth induced by retinoic acid. Furthermore, a phosphomimetic mutant of dysbindin alleviated neurite outgrowth and affected surface expression of N-methyl-d-aspartate 2A, a subunit of NMDA receptor in mouse hippocampal neurons. Together, our work reveals the regulation of dysbindin by VRK2, providing the association of these two proteins, which are commonly implicated in schizophrenia. OPEN SCIENCE BADGES: This article has received a badge for *Open Materials* because it provided all relevant information to reproduce the study in the manuscript. The complete Open Science Disclosure form for this article can be found at the end of the article. More information about the Open Practices badges can be found at https://cos.io/our-services/open-science-badges/.
Collapse
Affiliation(s)
- Young-Hun Jeong
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Korea
| | - Jung-Hyun Choi
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Korea
| | - Dohyun Lee
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Korea.,R&D Center, NovMetaPharma Co., Ltd., Pohang, 37668, Korea
| | - Sangjune Kim
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Korea.,Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.,Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Kyong-Tai Kim
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Korea.,Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang, Korea
| |
Collapse
|
13
|
Jeong YH, Yang SRE. Topological Gap States of Rectangular Armchair Ribbon. J Nanosci Nanotechnol 2018; 18:6142-6146. [PMID: 29677757 DOI: 10.1166/jnn.2018.15619] [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] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We consider a rectangular graphene armchair ribbon with an excitation gap. The boundary of this system consists of two short zigzag edges and two long armchair edges. Within such a ribbon, topological gap states exist that are localized along the zigzag edges. The end charge of these states is an integer, which can be related to the Zak phase of the periodic armchair ribbon constructed from the rectangular armchair ribbon by connecting its zigzag edges together. In this paper, we provide an explicit analytical computation of the Zak phase of a periodic armchair ribbon, and show that its value is consistent with the integer end charges that are computed numerically. In the presence of a staggered potential, non-integer end charges are possible. We discuss its relation to the Zak phase.
Collapse
Affiliation(s)
- Y H Jeong
- Department of Physics, Korea University, Seoul, 02841, Korea
| | - S R Eric Yang
- Department of Physics, Korea University, Seoul, 02841, Korea
| |
Collapse
|
14
|
Park YW, Jeong YH, Hwang JY, Kwack CH, Hwang SJ. P1714Risk stratification for ischemic and bleeding events in patients using a potent P2Y12 inhibitor. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1714] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Y W Park
- Gyeongsang National University Hospital, Jinju, Korea Republic of
| | - Y H Jeong
- Gyeongsang National University Hospital, Jinju, Korea Republic of
| | - J Y Hwang
- Gyeongsang National University Hospital, Jinju, Korea Republic of
| | - C H Kwack
- Gyeongsang National University Hospital, Jinju, Korea Republic of
| | - S J Hwang
- Gyeongsang National University Hospital, Jinju, Korea Republic of
| |
Collapse
|
15
|
Park YW, Jeong YH, Kim JH, Sohn SN, Kwack CH, Hwang JY. P810Histologic comparison of intracerebral and intracoronary thrombi. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy564.p810] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Y W Park
- Gyeongsang National University Changwon Hospital, Internal Medicine, Changwon, Korea Republic of
| | - Y H Jeong
- Gyeongsang National University Changwon Hospital, Internal Medicine, Changwon, Korea Republic of
| | - J H Kim
- Gyeongsang National University Hospital, Biomedical Research Institute, Jinju, Korea Republic of
| | - S N Sohn
- Hanil Hospital, Neurology, Jinju, Korea Republic of
| | - C H Kwack
- Gyeongsang National University Changwon Hospital, Internal Medicine, Changwon, Korea Republic of
| | - J Y Hwang
- Gyeongsang National University Hospital, Jinju, Korea Republic of
| |
Collapse
|
16
|
Choi JS, Jin SK, Jeong YH, Jung YC, Jung JH, Shim KS, Choi YI. Relationships between Single Nucleotide Polymorphism Markers and Meat Quality Traits of Duroc Breeding Stocks in Korea. Asian-Australas J Anim Sci 2016; 29:1229-38. [PMID: 27507182 PMCID: PMC5003982 DOI: 10.5713/ajas.16.0158] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 06/09/2016] [Accepted: 08/10/2016] [Indexed: 11/27/2022]
Abstract
This study was conducted to determine the relationships of five intragenic single nucleotide polymorphism (SNP) markers (protein kinase adenosine monophosphate-activated γ3 subunit [PRKAG3], fatty acid synthase [FASN], calpastatin [CAST], high mobility group AT-hook 1 [HMGA1], and melanocortin-4 receptor [MC4R]) and meat quality traits of Duroc breeding stocks in Korea. A total of 200 purebred Duroc gilts from 8 sires and 40 dams at 4 pig breeding farms from 2010 to 2011 reaching market weight (110 kg) were slaughtered and their carcasses were chilled overnight. Longissimus dorsi muscles were removed from the carcass after 24 h of slaughter and used to determine pork properties including carcass weight, backfat thickness, moisture, intramuscular fat, pH24h, shear force, redness, texture, and fatty acid composition. The PRKAG3, FASN, CAST, and MC4R gene SNPs were significantly associated with the meat quality traits (p<0.003). The meats of PRKAG3 (A 0.024/G 0.976) AA genotype had higher pH, redness and texture than those from PRKAG3 GG genotype. Meats of FASN (C 0.301/A 0.699) AA genotype had higher backfat thickness, texture, stearic acid, oleic acid and polyunsaturated fatty acid than FASN CC genotype. While the carcasses of CAST (A 0.373/G 0.627) AA genotype had thicker backfat, and lower shear force, palmitoleic acid and oleic acid content, they had higher stearic acid content than those from the CAST GG genotype. The MC4R (G 0.208/A 0.792) AA genotype were involved in increasing backfat thickness, carcass weight, moisture and saturated fatty acid content, and decreasing unsaturated fatty acid content in Duroc meat. These results indicated that the five SNP markers tested can be a help to select Duroc breed to improve carcass and meat quality properties in crossbred pigs.
Collapse
Affiliation(s)
- J S Choi
- Department of Animal Science, Chungbuk National University, Cheongju 361-763, Korea.,Department of Animal Resources Technology and Swine Science & Technology Center, Gyeongnam National University of Science and Technology, Jinju 660-758, Korea
| | - S K Jin
- Department of Animal Resources Technology and Swine Science & Technology Center, Gyeongnam National University of Science and Technology, Jinju 660-758, Korea
| | - Y H Jeong
- Hanwoo Department, Korea Animal Improvement Association, Seoul 137-871, Korea
| | - Y C Jung
- Jung P&C Institute, Yongin 446-982, Korea
| | - J H Jung
- Jung P&C Institute, Yongin 446-982, Korea
| | - K S Shim
- Department of Animal Biotechnology, Chunbuk National University, Jeonju 561-756, Korea
| | - Y I Choi
- Department of Animal Science, Chungbuk National University, Cheongju 361-763, Korea
| |
Collapse
|
17
|
Kim SC, Jeong YH, Yang SRE. Stability of Anomalous States of a Local Potential in Graphene. J Nanosci Nanotechnol 2015; 15:8263-8266. [PMID: 26726499 DOI: 10.1166/jnn.2015.11251] [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: 06/05/2023]
Abstract
Graphene Landau levels have discrete energies consisting zero energy chiral states and non-zero energy states with mixed chirality. Each Landau level splits into discrete energies when a localized potential is present. A simple scaling analysis suggests that a localized potential can act as a strong perturbation, and that it can be even more singular in graphene than in ordinary two-dimensional systems of massful electrons. Parabolic, Coulomb, and Gaussian potentials in graphene may have anomalous boundstates whose probability density has a sharp peak inside the potential and a broad peak of size magnetic length l outside the potential. The n = 0 Landau level with zero energy has only one anomalous state while the n = ±1 Landau levels with non-zero energy have two (integer quantum number n is related to the quantized Landau level energies). These anomalous states can provide a new magnetospectroscopic feature in impurity cyclotron resonances of graphene. In the present work we investigate quantitatively the conditions under which the anomalous states can exist. These results may provide a guide in searching for anomalous states experimentally.
Collapse
|
18
|
Nam J, Perera P, Gordon R, Jeong YH, Blazek AD, Kim DG, Tee BC, Sun Z, Eubank TD, Zhao Y, Lablebecioglu B, Liu S, Litsky A, Weisleder NL, Lee BS, Butterfield T, Schneyer AL, Agarwal S. Follistatin-like 3 is a mediator of exercise-driven bone formation and strengthening. Bone 2015; 78:62-70. [PMID: 25937185 PMCID: PMC4466155 DOI: 10.1016/j.bone.2015.04.038] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [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: 02/23/2015] [Revised: 04/15/2015] [Accepted: 04/24/2015] [Indexed: 11/17/2022]
Abstract
Exercise is vital for maintaining bone strength and architecture. Follistatin-like 3 (FSTL3), a member of follistatin family, is a mechanosensitive protein upregulated in response to exercise and is involved in regulating musculoskeletal health. Here, we investigated the potential role of FSTL3 in exercise-driven bone remodeling. Exercise-dependent regulation of bone structure and functions was compared in mice with global Fstl3 gene deletion (Fstl3-/-) and their age-matched Fstl3+/+ littermates. Mice were exercised by low-intensity treadmill walking. The mechanical properties and mineralization were determined by μCT, three-point bending test and sequential incorporation of calcein and alizarin complexone. ELISA, Western-blot analysis and qRT-PCR were used to analyze the regulation of FSTL3 and associated molecules in the serum specimens and tissues. Daily exercise significantly increased circulating FSTL3 levels in mice, rats and humans. Compared to age-matched littermates, Fstl3-/- mice exhibited significantly lower fracture tolerance, having greater stiffness, but lower strain at fracture and yield energy. Furthermore, increased levels of circulating FSTL3 in young mice paralleled greater strain at fracture compared to the lower levels of FSTL3 in older mice. More significantly, Fstl3-/- mice exhibited loss of mechanosensitivity and irresponsiveness to exercise-dependent bone formation as compared to their Fstl3+/+ littermates. In addition, FSTL3 gene deletion resulted in loss of exercise-dependent sclerostin regulation in osteocytes and osteoblasts, as compared to Fstl3+/+ osteocytes and osteoblasts, in vivo and in vitro. The data identify FSTL3 as a critical mediator of exercise-dependent bone formation and strengthening and point to its potential role in bone health and in musculoskeletal diseases.
Collapse
Affiliation(s)
- J Nam
- Department of Bioengineering, University of California, Riverside, CA 92507, USA.
| | - P Perera
- Division of Biosciences, The Ohio State University College of Dentistry, Columbus, OH 43210, USA
| | - R Gordon
- Division of Biosciences, The Ohio State University College of Dentistry, Columbus, OH 43210, USA
| | - Y H Jeong
- Division of Orthodontics, The Ohio State University College of Dentistry, Columbus, OH 43210, USA
| | - A D Blazek
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210, USA
| | - D G Kim
- Division of Orthodontics, The Ohio State University College of Dentistry, Columbus, OH 43210, USA
| | - B C Tee
- Division of Orthodontics, The Ohio State University College of Dentistry, Columbus, OH 43210, USA
| | - Z Sun
- Division of Orthodontics, The Ohio State University College of Dentistry, Columbus, OH 43210, USA
| | - T D Eubank
- Department of Internal Medicine, The Ohio State University College of Medicine, Columbus, OH 43210, USA
| | - Y Zhao
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH 43210, USA
| | - B Lablebecioglu
- Division of Periodontics, The Ohio State University College of Dentistry, Columbus, OH 43210, USA
| | - S Liu
- Hormel Institute, University of Minnesota, MN 55901, USA
| | - A Litsky
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH 43210, USA; Department of Orthopedics, The Ohio State University College of Medicine, Columbus, OH 43210, USA
| | - N L Weisleder
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210, USA
| | - B S Lee
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210, USA
| | - T Butterfield
- Department of Physiology, University of Kentucky, Lexington, KY 40536, USA
| | - A L Schneyer
- Department of Veterinary and Animal Science, University of Massachusetts-Amherst, MA 01003, USA
| | - S Agarwal
- Division of Biosciences, The Ohio State University College of Dentistry, Columbus, OH 43210, USA; Department of Orthopedics, The Ohio State University College of Medicine, Columbus, OH 43210, USA
| |
Collapse
|
19
|
Im J, Kim S, Jeong YH, Kim W, Lee D, Lee WS, Chang YT, Kim KT, Chung SK. Preparation and evaluation of BBB-permeable trehalose derivatives as potential therapeutic agents for Huntington's disease. Med Chem Commun 2013. [DOI: 10.1039/c2md20112g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
|
20
|
Lee SM, Jeong YH, Kim HM, Park HY, Yoon D, Kim DH, Saeki S, Moon SJ, Kang MJ. Presenilin enhancer-2 (PSENEN), a component of the gamma-secretase complex, is involved in adipocyte differentiation. Domest Anim Endocrinol 2009; 37:170-80. [PMID: 19592191 DOI: 10.1016/j.domaniend.2009.05.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2009] [Revised: 05/20/2009] [Accepted: 05/23/2009] [Indexed: 11/16/2022]
Abstract
This study was conducted to identify genes expressed during adipocyte differentiation of bovine intramuscular fibroblast-like cells using differential display reverse-transcriptase polymerase chain reaction. The presenilin enhancer-2 (PSENEN) gene was found to be down-regulated during adipocyte differentiation of bovine intramuscular fibroblast-like cells. The ectopic expression of bovine PSENEN in 3T3-L1 reduced adipogenesis and the inhibition of endogenous PSENEN by siRNA induced adipogenesis on d 4 of adipocyte differentiation of 3T3-L1 cells. Interestingly, the expression of gamma-secretase complex gene-related Notch signaling was decreased at d 2 and d 4 during adipocyte differentiation. In addition, expression of the Notch-signaling genes (Notch-1, Hes-1, Pref-1, adipsin) was regulated during adipocyte differentiation by regulation of PSENEN expression. These results suggest that PSENEN plays an important role in adipocyte differentiation and that Notch signaling is involved in adipogenesis.
Collapse
Affiliation(s)
- S M Lee
- Department of Animal Science, College of Agriculture and Life Science, Institute of Agricultural Science and Technology, Chonnam National University, Gwangju 500-757, Korea
| | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Koo J, Song C, Ji S, Lee JS, Park J, Jang TH, Yang CH, Park JH, Jeong YH, Lee KB, Koo TY, Park YJ, Kim JY, Wermeille D, Goldman AI, Srajer G, Park S, Cheong SW. Non-resonant and resonant x-ray scattering studies on multiferroic TbMn2O5. Phys Rev Lett 2007; 99:197601. [PMID: 18233114 DOI: 10.1103/physrevlett.99.197601] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2007] [Indexed: 05/25/2023]
Abstract
Comprehensive x-ray scattering studies, including resonant scattering at Mn L, Tb L, and M edges, were performed on single crystals of TbMn2O5 for crystallographic data to elucidate the nature of its commensurate and incommensurate phases. The scattering results provide direct evidence of symmetry lowering to the ferroelectric phase driven by magnetically induced lattice modulations and show the presence of multiple magnetic orders. The competing orders under spin-frustrated geometry are believed to cause discommensuration and result in the commensurate-to-incommensurate phase transition around 24 K. It is proposed that the low temperature incommensurate phase consists of commensurate domains separated by antiphase domain walls which change both signs of spontaneous polarizations and x-ray scattering amplitudes for forbidden reflections.
Collapse
Affiliation(s)
- J Koo
- eSSC and Department of Physics, POSTECH, Pohang, Korea
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Hayashi T, Fujisawa T, Cheong HD, Jeong YH, Hirayama Y. Coherent manipulation of electronic States in a double quantum dot. Phys Rev Lett 2003; 91:226804. [PMID: 14683264 DOI: 10.1103/physrevlett.91.226804] [Citation(s) in RCA: 160] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2003] [Indexed: 05/24/2023]
Abstract
We investigate coherent time evolution of charge states (pseudospin qubit) in a semiconductor double quantum dot. This fully tunable qubit is manipulated with a high-speed voltage pulse that controls the energy and decoherence of the system. Coherent oscillations of the qubit are observed for several combinations of many-body ground and excited states of the quantum dots. Possible decoherence mechanisms in the present device are also discussed.
Collapse
Affiliation(s)
- T Hayashi
- NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi 243-0198, Japan
| | | | | | | | | |
Collapse
|
23
|
Abstract
Continuous cultures of immobilized Streptomyces kasugaensis, a kasugamycin producer, were carried out on Celite beads. When using a prototype separator for immobilized-cell separation and recycling, the continuous operation could not be sustained for an extended period as a result of an excessive loss of immobilized cells caused by the poor performance of the separator. Accordingly, the immobilized-cell separator was revised to provide better immobilized-cell settling and thus recycling into the reactor. In a subsequent culture using the revised separator, a stable operation was maintained for over 820 h with a high kasugamycin productivity. The kasugamycin productivity ranged from 9.8 to 16.1 mg/L/h, which was about 14- to 23-fold higher than that in a batch suspended-cell culture. When the original feeding medium concentration was doubled at the end of the continuous culture, the productivity became severely impaired for several reasons, which will be discussed. An excessive formation of free cells and loss of immobilized cells through the separator were also observed.
Collapse
Affiliation(s)
- C J Kim
- Department of Chemical Engineering and BioProcess Engineering Research Center, Korea Advanced Institute of Science and Technology, Taejeon 305-701, Korea.
| | | | | | | | | |
Collapse
|
24
|
Abstract
A highly chromate-selective biosorbent with high adsorption capacity was found by examining the chromate adsorption capacities of 48 species of red, brown, or green marine algae sampled from the east coast of Korea. As a result of screening, a red marine alga showed excellent adsorption characteristics. It was identified as Pachymeniopsis sp. The timing of the sampling of Pachymeniopsis sp. did not affect the adsorption capacity of the alga but the optimum period for mass collection was April-May. The alga also showed high selectivity for chromate and its adsorption capacity for other heavy metal ions such as cadmium and manganese was relatively low. An investigation of the adsorption isotherm of Pachymeniopsis sp. as a dried powder for chromate adsorption at 25 degrees C showed Langmuir-type dependence. The maximum chromate adsorption capacity of the selected alga was about 225 mg/g. The desorption of adsorbed chromate from Pachymeniopsis sp. was done by treating samples with 1 N NaOH. It was confirmed that ion exchange type adsorption was observed with anion exchangers but not with cation exchangers. Therefore it is believed that the chromate adsorption is based on the anionic exchange of Pachymeniopsis sp.
Collapse
Affiliation(s)
- D C Lee
- Division of Food Science and Biotechnology, Kangwon National University, Chunchon, Korea
| | | | | | | | | |
Collapse
|
25
|
Choi YS, Lee DY, Kim IY, Kang S, Ahn K, Kim HJ, Jeong YH, Chun GT, Park JK, Kim IH. Ammonia removal using hepatoma cells in mammalian cell cultures. Biotechnol Prog 2000; 16:760-8. [PMID: 11027167 DOI: 10.1021/bp000099d] [Citation(s) in RCA: 17] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
It was examined whether hepatocyte cell lines can be used for ammonia removal in mammalian cell cultures. It was found that there exists a critical ammonium concentration level for each hepatocyte cell to remove ammonia. Among the cells tested in this work, primary hepatocytes showed the strongest ammonia removal capability if ammonium concentration is higher than the critical level. However, primary hepatocytes lost the liver function gradually and finally died after 2-3 weeks. Because of this limitation, primary hepatocytes were not appropriate to be used for ammonia removal in long-term cultures. Hep G2 cells, which are immortal, also showed a strong ammonia removal activity. The ammonia removal activity of Hep G2 cells depended on the concentration of ammonium in the medium, as in the case of primary hepatocytes. However, urea could not be detected in the course of ammonia removal by Hep G2 cells. Instead of urea, Hep G2 cells secreted glutamine into the culture medium. The capacity for ammonia removal was higher in the absence than in the presence of glutamine. Thus we checked the activity of glutamine synthetase in the Hep G2 cells. The level of glutamine synthetase activity increased with the addition of ammonium chloride. This result accounts for the ammonium concentration dependency of Hep G2 cells in ammonia removal and glutamine synthesis. Furthermore Hep G2 cells could grow well in the absence of glutamine, which was necessarily required in mammalian cell cultures. These results prove that glutamine formation serves as the primary mechanism of detoxifying ammonia in hepatocyte cell lines as expected. In addition, it was demonstrated that ammonium level could be reduced 38% and that erythropoietin production increased 2-fold in the mixed culture of Hep G2 and recombinant CHO cells.
Collapse
Affiliation(s)
- Y S Choi
- Graduate School of Biotechnology, Korea University, Seoul 136-701, Korea
| | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Abstract
A high-chromate-selective biosorbent with high adsorption capacity was sought by examining the chromate adsorption capacities of 48 species of red, brown, or green marine algae sampled from the east coast of Korea. Screening showed a red marine alga to have the most excellent adsorption characteristics among them, and it was identified as Pachymeniopsis sp. The period at which Pachymeniopsis sp. was sampled did not affect the adsorption capacity of the alga, but the optimum period for mass collection was April to May. The alga also showed high selectivity for chromate since its adsorption capacity for other heavy metal ions such as cadmium and manganese ions was relatively low. An investigation of the adsorption isotherm of dried powder of Pachymeniopsis sp. for chromate adsorption at 25 degrees C showed a Langmuir-type dependence. The maximum chromate adsorption capacity of the selected alga was about 225 mg/g. Desorption of the adsorbed chromate from Pachymeniopsis sp. was done by treating the sample with 1 N NaOH. It was confirmed that ion exchange type adsorption was observed with an anion exchanger but not with a cation exchanger. It is therefore believed that the chromate adsorption is based on anionic exchange of Pachymeniopsis sp.
Collapse
Affiliation(s)
- D C Lee
- Division of Food Science and Biotechnology, Kangwon National University, Chunchon, Korea
| | | | | | | | | |
Collapse
|
27
|
Cho JG, Jeong YH, Cho IJ, Ahn YG, Cha KS, Seo JP, Park JH, Jeong MH, Park JC, Kang JC. Atrial fibrillation in patients with permanent VVI pacemakers: risk factors for atrial fibrillation. Korean J Intern Med 1997; 12:34-8. [PMID: 9159035 PMCID: PMC4531969 DOI: 10.3904/kjim.1997.12.1.34] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
OBJECTIVES Atrial fibrillation (AF) does not only deteriorate the cardiac function and increases the thromboembolic risk but also triggers rapid and irregular ventricular rhythm in patients with atrial synchronous pacing. However, the risk factors for the development of AF in patients with pacemakers are not clearly determined yet. The present study was designed to determine the risk factors for AF in patients with VVI pacemakers. METHODS This study included 80 patients (41 sick sinus syndrome, 39 AV block) who were followed for more than 6 months or developed AF regardless of the duration of follow-up after implantation of VVI pacemakers. Patients were divided into two groups according to whether or not AF developed during follow-up (mean: 25.7 +/- 2.5 months): group A developed AF and group B did not. The underlying arrhythmias, cardiovascular risk factors, left atrial size, characteristics of P wave were compared between the two groups. RESULTS The mean age of the patients was 58.9 +/- 11.4 years and 28 (35%) were male. AF developed in 13 (16.3%) of 80 patients with VVI pacemakers. Sick sinus syndrome (SSS) as an underlying arrhythmia was significantly more frequent in group A than group B (84.6% vs. 44.8%, p < 0.01). P wave width was greater in group A (127.6 +/- 24.8 ms) than in group B (110.7 +/- 17 ms) (p < 0.05). There was, however, no significant difference in cardiovascular risk factors, left atrial size, P wave axis and amplitude between the two groups. CONCLUSION These results suggest that sinus node dysfunction and intra-atrial conduction delay may be the risk factors for AF in patients with VVI pacemakers. Further studies are needed to determine how sick sinus syndrome and intra-atrial conduction delay increase the risk for AF in patients with VVI pacemakers.
Collapse
Affiliation(s)
- J G Cho
- Department of Internal Medicine, Chonnam University Hospital, Kwangju, Korea
| | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Jeong YH, Moon IK. Ergodic-nonergodic glass transition and enthalpy relaxation of a supercooled liquid. Phys Rev B Condens Matter 1995; 52:6381-6385. [PMID: 9981866 DOI: 10.1103/physrevb.52.6381] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
29
|
Vial HJ, Ancelin ML, Elabbadi N, Gumila C, Bonnet H, Jeong YH, Philippot J, Calas M, Portefaix P, Piquet G. The design of original antimalarial drugs. An example of phospholipid metabolism. Parassitologia 1993; 35 Suppl:125-7. [PMID: 8233602] [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] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The aim of our program was to find an original chemotherapeutical treatment (and eventually a preventive treatment) of malaria, an illness largely predominant in developing countries, by interfering on an essential metabolism developed by Plasmodium during its erythrocytic phase. Apart from what has been learnt about metabolism and the pharmacological target, a crucial step has been taken during this contract by passing from micromolar in vitro active concentrations (during 1986-1990) to nanomolar ones (during 1990). These compounds should naturally short-circuit resistance phenomena already established against drugs in current use, as has already been verified on polypharmacoresistant strains or isolates of P. falciparum. The administration of a therapeutic dose of our molecules would now appear to be possible in all cases.
Collapse
Affiliation(s)
- H J Vial
- Interactions membranaires, CNRS URA 530, Montpellier, France
| | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Affiliation(s)
- S N Agathos
- Department of Chemical and Biochemical Engineering, Rutgers University, Piscataway, New Jersey 08855-0909
| | | | | |
Collapse
|
31
|
Lee SI, Jeong YH, Han KH, Lim ZS, Song YS, Park YW. Superconductivity and thermoelectric power of Pr1.85Ce0.15CuO4-y. Phys Rev B Condens Matter 1990; 41:2623-2626. [PMID: 9994020 DOI: 10.1103/physrevb.41.2623] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
32
|
Jeong YH, Nounesis G, Garland CW, Shashidhar R. Calorimetric study of the smectic-Ad-smectic-A2 critical point. Phys Rev A Gen Phys 1989; 40:4022-4027. [PMID: 9902622 DOI: 10.1103/physreva.40.4022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
33
|
Lim ZS, Han KH, Lee SI, Jeong YH, Salk SH, Song YS, Park YW. Thermoelectric power of Nd1.85Ce0.15CuO4-y and Pr1.85Ce0.15CuO4-y. Phys Rev B Condens Matter 1989; 40:7310-7312. [PMID: 9991127 DOI: 10.1103/physrevb.40.7310] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
34
|
Wu L, Ernst RM, Jeong YH, Nagel SR, Susman S. Distribution of barriers in (KBr)1-x(KCN)x: Dielectric response and specific heat. Phys Rev B Condens Matter 1988; 37:10444-10447. [PMID: 9944498 DOI: 10.1103/physrevb.37.10444] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
|
35
|
Jeong YH, Stine KJ, Garland CW, Tinh NH. Nature of the smectic-A2-smectic-C2 transition: A calorimetric study. Phys Rev A Gen Phys 1988; 37:3465-3468. [PMID: 9900092 DOI: 10.1103/physreva.37.3465] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
36
|
|
37
|
Shivaram BS, Jeong YH, Rosenbaum TF, Hinks DG, Schmitt-Rink S. Transverse sound in a magnetic field in UPt3. Phys Rev B Condens Matter 1987; 35:5372-5374. [PMID: 9940740 DOI: 10.1103/physrevb.35.5372] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
|
38
|
Jeong YH, Nagel SR, Bhattacharya S. Ultrasonic investigation of the glass transition in glycerol. Phys Rev A Gen Phys 1986; 34:602-608. [PMID: 9897288 DOI: 10.1103/physreva.34.602] [Citation(s) in RCA: 61] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
39
|
Shivaram BS, Jeong YH, Rosenbaum TF, Hinks DG. Anisotropy of transverse sound in the heavy fermion superconductor UPt3. Phys Rev Lett 1986; 56:1078-1081. [PMID: 10032562 DOI: 10.1103/physrevlett.56.1078] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|