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  1. Article ; Online: The seasonality of carbapenemase-producing Enterobacterales in South Korea.

    Kim, J Y / Park, S / Kim, E O / Chang, E / Bae, S / Kim, M J / Chong, Y P / Choi, S-H / Lee, S-O / Kim, Y S / Jung, J / Kim, S-H

    The Journal of hospital infection

    2023  Volume 140, Page(s) 87–89

    MeSH term(s) Humans ; Bacterial Proteins ; beta-Lactamases ; Republic of Korea/epidemiology ; Anti-Bacterial Agents/pharmacology
    Chemical Substances carbapenemase (EC 3.5.2.6) ; Bacterial Proteins ; beta-Lactamases (EC 3.5.2.6) ; Anti-Bacterial Agents
    Language English
    Publishing date 2023-07-26
    Publishing country England
    Document type Journal Article
    ZDB-ID 779366-2
    ISSN 1532-2939 ; 0195-6701
    ISSN (online) 1532-2939
    ISSN 0195-6701
    DOI 10.1016/j.jhin.2023.07.010
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: The impact of discontinuing single-room isolation of patients with vancomycin-resistant enterococci: a quasi-experimental single-centre study in South Korea.

    Park, S / Bae, S / Kim, E O / Chang, E / Kim, M J / Chong, Y P / Choi, S-H / Lee, S-O / Kim, Y S / Jung, J / Kim, S-H

    The Journal of hospital infection

    2024  Volume 147, Page(s) 77–82

    Abstract: Objectives: There is limited data on the effects of discontinuing single-room isolation while maintaining contact precautions, such as the use of gowns and gloves. In April 2021, our hospital ceased single-room isolation for patients with vancomycin- ... ...

    Abstract Objectives: There is limited data on the effects of discontinuing single-room isolation while maintaining contact precautions, such as the use of gowns and gloves. In April 2021, our hospital ceased single-room isolation for patients with vancomycin-resistant enterococci (VRE) because of single-room unavailability. This study assessed the impact of this policy by examining the incidence of hospital-acquired VRE bloodstream infections (HA-VRE BSI).
    Methods: This retrospective quasi-experimental study was conducted at a tertiary-care hospital in Seoul, South Korea. Time-series analysis was used to evaluate HA-VRE BSI incidence at the hospital level and in the haematology unit before (phase 1) and after (phase 2) the policy change.
    Results: At the hospital level, HA-VRE BSI incidence level (VRE BSI per 1000 patient-days per month) and trend did not change significantly between phase 1 and phase 2 (coefficient -0.015, 95% confidence interval (CI): -0.053 to 0.023, P=0.45 and 0.000, 95% CI: -0.002 to 0.002, P=0.84, respectively). Similarly, HA-VRE BSI incidence level and trend in the haematology unit (-0.285, 95% CI: -0.618 to 0.048, P=0.09 and -0.018, 95% CI: -0.036 to 0.000, P = 0.054, respectively) did not change significantly across the two phases.
    Conclusions: Discontinuing single-room isolation of VRE-colonized or infected patients was not associated with an increase in the incidence of VRE BSI at the hospital level or among high-risk patients in the haematology unit. Horizontal intervention for multi-drug-resistant organisms, including measures such as enhanced hand hygiene and environmental cleaning, may be more effective at preventing VRE transmission.
    Language English
    Publishing date 2024-03-15
    Publishing country England
    Document type Journal Article
    ZDB-ID 779366-2
    ISSN 1532-2939 ; 0195-6701
    ISSN (online) 1532-2939
    ISSN 0195-6701
    DOI 10.1016/j.jhin.2024.02.025
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Genome-Wide Genetic Associations Prioritize Evaluation of Causal Mechanisms of Atherosclerotic Disease Risk.

    Quertermous, Thomas / Li, Daniel Yuhang / Weldy, Chad S / Ramste, Markus / Sharma, Disha / Monteiro, João P / Gu, Wenduo / Worssam, Matthew D / Palmisano, Brian T / Park, Chong Y / Cheng, Paul

    Arteriosclerosis, thrombosis, and vascular biology

    2024  Volume 44, Issue 2, Page(s) 323–327

    Abstract: Objective: The goal of this review is to discuss the implementation of genome-wide association studies to identify causal mechanisms of vascular disease risk.: Approach and results: The history of genome-wide association studies is described, the use ...

    Abstract Objective: The goal of this review is to discuss the implementation of genome-wide association studies to identify causal mechanisms of vascular disease risk.
    Approach and results: The history of genome-wide association studies is described, the use of imputation and the creation of consortia to conduct meta-analyses with sufficient power to arrive at consistent associated loci for vascular disease. Genomic methods are described that allow the identification of causal variants and causal genes and how they impact the disease process. The power of single-cell analyses to promote genome-wide association studies of causal gene function is described.
    Conclusions: Genome-wide association studies represent a paradigm shift in the study of cardiovascular disease, providing identification of genes, cellular phenotypes, and disease pathways that empower the future of targeted drug development.
    MeSH term(s) Humans ; Genome-Wide Association Study ; Genomics ; Cardiovascular Diseases ; Drug Development ; Vascular Diseases
    Language English
    Publishing date 2024-01-24
    Publishing country United States
    Document type Review ; Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 1221433-4
    ISSN 1524-4636 ; 1079-5642
    ISSN (online) 1524-4636
    ISSN 1079-5642
    DOI 10.1161/ATVBAHA.123.319480
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Membrane Potential-Dependent Uptake of Cationic Oligoimidazolium Mediates Bacterial DNA Damage and Death.

    Yong, Melvin / Kok, Zhi Y / Koh, Chong H / Zhong, Wenbin / Ng, Justin Ty / Mu, Yuguang / Chan-Park, Mary B / Gan, Yunn-Hwen

    Antimicrobial agents and chemotherapy

    2023  Volume 67, Issue 5, Page(s) e0035523

    Abstract: The treatment of bacterial infections is becoming increasingly challenging with the emergence of antimicrobial resistance. Thus, the development of antimicrobials with novel mechanisms of action is much needed. Previously, we designed several cationic ... ...

    Abstract The treatment of bacterial infections is becoming increasingly challenging with the emergence of antimicrobial resistance. Thus, the development of antimicrobials with novel mechanisms of action is much needed. Previously, we designed several cationic main-chain imidazolium compounds and identified the polyimidazolium PIM1 as a potent antibacterial against a wide panel of multidrug-resistant nosocomial pathogens, and it had relatively low toxicity against mammalian epithelial cells. However, little is known about the mechanism of action of PIM1. Using an oligomeric version of PIM1 with precisely six repeating units (OIM1-6) to control for consistency, we showed that OIM1-6 relies on an intact membrane potential for entry into the bacterial cytoplasm, as resistant mutants to OIM1-6 have mutations in their electron transport chains. These mutants demonstrate reduced uptake of the compound, which can be circumvented through the addition of a sub-MIC dose of colistin. Once taken up intracellularly, OIM1-6 exerts double-stranded DNA breaks. Its potency and ability to kill represents a promising class of drugs that can be combined with membrane-penetrating drugs to potentiate activity and hedge against the rise of resistant mutants. In summary, we discovered that cationic antimicrobial OIM1-6 exhibits an antimicrobial property that is dissimilar to the conventional cationic antimicrobial compounds. Its killing mechanism does not involve membrane disruption but instead depends on the membrane potential for uptake into bacterial cells so that it can exert its antibacterial effect intracellularly.
    MeSH term(s) Animals ; DNA, Bacterial ; Membrane Potentials ; Antimicrobial Cationic Peptides/pharmacology ; Anti-Bacterial Agents/pharmacology ; Anti-Infective Agents ; Bacteria ; Microbial Sensitivity Tests ; Mammals
    Chemical Substances DNA, Bacterial ; Antimicrobial Cationic Peptides ; Anti-Bacterial Agents ; Anti-Infective Agents
    Language English
    Publishing date 2023-05-01
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 217602-6
    ISSN 1098-6596 ; 0066-4804
    ISSN (online) 1098-6596
    ISSN 0066-4804
    DOI 10.1128/aac.00355-23
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Tumor Budding is a Valuable Diagnostic Parameter in Prediction of Disease Progression of Endometrial Endometrioid Carcinoma.

    Park, Ji Young / Hong, Dae Gy / Chong, Gun Oh / Park, Ji Y

    Pathology oncology research : POR

    2019  Volume 25, Issue 2, Page(s) 723–730

    Abstract: Recently, tumor budding (TB) found at the invasive margin has been related to lymph node involvement (LNI), local recurrence, and poor prognosis in various cancers. We assessed the presence of TB in endometrial endometrioid carcinoma (EEC), and examined ... ...

    Abstract Recently, tumor budding (TB) found at the invasive margin has been related to lymph node involvement (LNI), local recurrence, and poor prognosis in various cancers. We assessed the presence of TB in endometrial endometrioid carcinoma (EEC), and examined the immunohistochemical (IHC) profiles to define its clinicopathological significance. Ninety-six EECs were obtained from 2008 to 2013. During the follow-up, ten patients experienced disease progression; of these, three patients succumbed to the disease. All hematoxylin and eosin-stained slides were scrutinized for the presence of TB. IHC stainings for estrogen receptor (ER), progesterone receptor (PR), β-catenin, and E-cadherin were performed. All cases were grouped as FIGO grade (G) 1 (47.9%), G2 (29.2%), and G3 (22.9%). The distribution for depth of invasion (DOI) was 68.5% with a DOI of less than half and 31.5% with a DOI of more than half. Myometrial invasion was characterized as infiltrating pattern (52.1%), adenomyosis-like (20.8%), microcystic, elongated, and fragmented (17.7%), or expansile (9.4%). TB was identified in 63 cases (65.6%). Lymphovascular invasion (LVI) and LNI were identified in 47 and 37 cases, respectively. TB was associated with deep DOI (p = 0.001), higher FIGO grade (p = 0.006), LVI (p < 0.0001), and LNI (p < 0.0001). TB showed loss of ER (p < 0.0001) and PR (p < 0.0001), reduced E-cadherin (p < 0.0001) expression, and aberrant β-catenin expression (p = 0.042). In EECs, TB was associated with deep DOI, less-differentiated histology, frequent LVI, and LNI; furthermore, TB was closely related to epithelial-mesenchymal transition phenotype and downregulation of hormonal receptors. Therefore, TB might be a determinant histologic clue for prediction of disease progression in EECs.
    MeSH term(s) Adult ; Aged ; Carcinoma, Endometrioid/pathology ; Disease Progression ; Endometrial Neoplasms/pathology ; Female ; Humans ; Lymphatic Metastasis/pathology ; Middle Aged ; Neoplasm Invasiveness/pathology
    Language English
    Publishing date 2019-01-02
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1375979-6
    ISSN 1532-2807 ; 1219-4956
    ISSN (online) 1532-2807
    ISSN 1219-4956
    DOI 10.1007/s12253-018-0554-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Single-cell transcriptome dataset of human and mouse in vitro adipogenesis models.

    Li, Jiehan / Jin, Christopher / Gustafsson, Stefan / Rao, Abhiram / Wabitsch, Martin / Park, Chong Y / Quertermous, Thomas / Knowles, Joshua W / Bielczyk-Maczynska, Ewa

    Scientific data

    2023  Volume 10, Issue 1, Page(s) 387

    Abstract: Adipogenesis is a process in which fat-specific progenitor cells (preadipocytes) differentiate into adipocytes that carry out the key metabolic functions of the adipose tissue, including glucose uptake, energy storage, and adipokine secretion. Several ... ...

    Abstract Adipogenesis is a process in which fat-specific progenitor cells (preadipocytes) differentiate into adipocytes that carry out the key metabolic functions of the adipose tissue, including glucose uptake, energy storage, and adipokine secretion. Several cell lines are routinely used to study the molecular regulation of adipogenesis, in particular the immortalized mouse 3T3-L1 line and the primary human Simpson-Golabi-Behmel syndrome (SGBS) line. However, the cell-to-cell variability of transcriptional changes prior to and during adipogenesis in these models is not well understood. Here, we present a single-cell RNA-Sequencing (scRNA-Seq) dataset collected before and during adipogenic differentiation of 3T3-L1 and SGBS cells. To minimize the effects of experimental variation, we mixed 3T3-L1 and SGBS cells and used computational analysis to demultiplex transcriptomes of mouse and human cells. In both models, adipogenesis results in the appearance of three cell clusters, corresponding to preadipocytes, early and mature adipocytes. These data provide a groundwork for comparative studies on these widely used in vitro models of human and mouse adipogenesis, and on cell-to-cell variability during this process.
    MeSH term(s) Humans ; Adipocytes/metabolism ; Adipogenesis/genetics ; Adipose Tissue/metabolism ; Cell Differentiation ; Transcriptome ; Animals ; Mice ; Single-Cell Gene Expression Analysis
    Language English
    Publishing date 2023-06-16
    Publishing country England
    Document type Dataset ; Journal Article
    ZDB-ID 2775191-0
    ISSN 2052-4463 ; 2052-4463
    ISSN (online) 2052-4463
    ISSN 2052-4463
    DOI 10.1038/s41597-023-02293-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Single-cell transcriptome dataset of human and mouse

    Li, Jiehan / Jin, Christopher / Gustafsson, Stefan / Rao, Abhiram / Wabitsch, Martin / Park, Chong Y / Quertermous, Thomas / Bielczyk-Maczynska, Ewa / Knowles, Joshua W

    bioRxiv : the preprint server for biology

    2023  

    Abstract: Adipogenesis is a process in which fat-specific progenitor cells (preadipocytes) differentiate into adipocytes that carry out the key metabolic functions of the adipose tissue, including glucose uptake, energy storage, and adipokine secretion. Several ... ...

    Abstract Adipogenesis is a process in which fat-specific progenitor cells (preadipocytes) differentiate into adipocytes that carry out the key metabolic functions of the adipose tissue, including glucose uptake, energy storage, and adipokine secretion. Several cell lines are routinely used to study the molecular regulation of adipogenesis, in particular the immortalized mouse 3T3-L1 line and the primary human Simpson-Golabi-Behmel syndrome (SGBS) line. However, the cell-to-cell variability of transcriptional changes prior to and during adipogenesis in these models is not well understood. Here, we present a single-cell RNA-Sequencing (scRNA-Seq) dataset collected before and during adipogenic differentiation of 3T3-L1 and SGBS cells. To minimize the effects of experimental variation, we mixed 3T3-L1 and SGBS cells and used computational analysis to demultiplex transcriptomes of mouse and human cells. In both models, adipogenesis results in the appearance of three cell clusters, corresponding to preadipocytes, early and mature adipocytes. These data provide a groundwork for comparative studies on human and mouse adipogenesis, as well as on cell-to-cell variability in gene expression during this process.
    Language English
    Publishing date 2023-03-29
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2023.03.27.534456
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Role of Tumor-Associated Macrophages in Cervical Cancer: Integrating Classical Perspectives with Recent Technological Advances.

    Choi, Yeseul / Lee, Donghyeon / Kim, Na Young / Seo, Incheol / Park, Nora Jee-Young / Chong, Gun Oh

    Life (Basel, Switzerland)

    2024  Volume 14, Issue 4

    Abstract: Tumor-associated macrophages (TAMs) play a pivotal role in the tumor microenvironment, influencing cancer progression and contributing to poor prognosis. However, in cervical cancer (CC), their significance and involvement are relatively less studied ... ...

    Abstract Tumor-associated macrophages (TAMs) play a pivotal role in the tumor microenvironment, influencing cancer progression and contributing to poor prognosis. However, in cervical cancer (CC), their significance and involvement are relatively less studied than in other gynecological cancers such as ovarian and endometrial cancer. This review aims to provide an overview of TAMs, covering their origins and phenotypes and their impact on CC progression, along with major TAM-targeted therapeutic approaches. Furthermore, we advocate for the integration of cutting-edge research methodologies, such as single-cell RNA sequencing and spatial RNA sequencing, to enable in-depth and comprehensive investigations into TAMs in CC, which would be beneficial in leading to more personalized and effective immunotherapy strategies for patients with CC.
    Language English
    Publishing date 2024-03-27
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2662250-6
    ISSN 2075-1729
    ISSN 2075-1729
    DOI 10.3390/life14040443
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Appropriate sites for active surveillance of carbapenemase-producing Enterobacterales.

    Park, J H / Choi, H-S / Yang, H / Lee, H-J / Kwak, S H / Kim, E O / Chong, Y P / Choi, S-H / Lee, S-O / Kim, Y S / Sung, H / Kim, M-N / Kim, S-H / Jung, J

    The Journal of hospital infection

    2022  Volume 122, Page(s) 211–213

    MeSH term(s) Anti-Bacterial Agents/pharmacology ; Anti-Bacterial Agents/therapeutic use ; Bacterial Proteins ; Enterobacteriaceae Infections/drug therapy ; Enterobacteriaceae Infections/epidemiology ; Humans ; Watchful Waiting ; beta-Lactamases
    Chemical Substances Anti-Bacterial Agents ; Bacterial Proteins ; beta-Lactamases (EC 3.5.2.6) ; carbapenemase (EC 3.5.2.6)
    Language English
    Publishing date 2022-02-03
    Publishing country England
    Document type Letter
    ZDB-ID 779366-2
    ISSN 1532-2939 ; 0195-6701
    ISSN (online) 1532-2939
    ISSN 0195-6701
    DOI 10.1016/j.jhin.2022.01.003
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Six-Year Outcomes in Subjects with Polypoidal Choroidal Vasculopathy in the EVEREST II Study.

    Teo, Kelvin Yi Chong / Park, Kyu-Hyung / Ngah, Nor Fariza / Chen, Shih-Jen / Ruamviboonsuk, Paisan / Mori, Ryusaburo / Kondo, Nagako / Lee, Won Ki / Rajagopalan, Rajesh / Obata, Ryo / Wong, Ian Y H / Chee, Caroline / Terasaki, Hiroko / Sekiryu, Tetsuju / Chen, Shih-Chou / Yanagi, Yasuo / Honda, Shigeru / Lai, Timothy Y Y / Cheung, Chui Ming Gemmy

    Ophthalmology and therapy

    2024  Volume 13, Issue 4, Page(s) 935–954

    Abstract: Introduction: The EVEREST II study previously reported that intravitreally administered ranibizumab (IVR) combined with photodynamic therapy (PDT) achieved superior visual gain and polypoidal lesion closure compared to IVR alone in patients with ... ...

    Abstract Introduction: The EVEREST II study previously reported that intravitreally administered ranibizumab (IVR) combined with photodynamic therapy (PDT) achieved superior visual gain and polypoidal lesion closure compared to IVR alone in patients with polypoidal choroidal vasculopathy (PCV). This follow-up study reports the long-term outcomes 6 years after initiation of the EVEREST II study.
    Methods: This is a non-interventional cohort study of 90 patients with PCV from 16 international trial sites who originally completed the EVEREST II study. The long-term outcomes were assessed during a recall visit at about 6 years from commencement of EVEREST II.
    Results: The monotherapy and combination groups contained 41 and 49 participants, respectively. The change in best-corrected visual acuity (BCVA) from baseline to year 6 was not different between the monotherapy and combination groups; - 7.4 ± 23.0 versus - 6.1 ± 22.4 letters, respectively. The combination group had greater central subfield thickness (CST) reduction compared to the monotherapy group at year 6 (- 179.9 vs - 74.2 µm, p = 0.011). Fewer eyes had subretinal fluid (SRF)/intraretinal fluid (IRF) in the combination versus monotherapy group at year 6 (35.4% vs 57.5%, p = 0.032). Factors associated with BCVA at year 6 include BCVA (year 2), CST (year 2), presence of SRF/IRF at year 2, and number of anti-VEGF treatments (years 2-6). Factors associated with presence of SRF/IRF at year 6 include combination arm (OR 0.45, p = 0.033), BCVA (year 2) (OR 1.53, p = 0.046), and presence of SRF/IRF (year 2) (OR 2.59, p = 0.042).
    Conclusion: At 6 years following the EVEREST II study, one-third of participants still maintained good vision. As most participants continued to require treatment after exiting the initial trial, ongoing monitoring and re-treatment regardless of polypoidal lesion status are necessary in PCV.
    Trial registration: ClinicalTrials.gov identifier, NCT01846273.
    Language English
    Publishing date 2024-02-03
    Publishing country England
    Document type Journal Article
    ISSN 2193-8245
    ISSN 2193-8245
    DOI 10.1007/s40123-024-00888-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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