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  1. Article ; Online: DRSPRING: Graph convolutional network (GCN)-Based drug synergy prediction utilizing drug-induced gene expression profile.

    Han, Jiyeon / Kang, Min Ji / Lee, Sanghyuk

    Computers in biology and medicine

    2024  Volume 174, Page(s) 108436

    Abstract: Great efforts have been made over the years to identify novel drug pairs with synergistic effects. Although numerous computational approaches have been proposed to analyze diverse types of biological big data, the pharmacogenomic profiles, presumably the ...

    Abstract Great efforts have been made over the years to identify novel drug pairs with synergistic effects. Although numerous computational approaches have been proposed to analyze diverse types of biological big data, the pharmacogenomic profiles, presumably the most direct proxy of drug effects, have been rarely used due to the data sparsity problem. In this study, we developed a composite deep-learning-based model that predicts the drug synergy effect utilizing pharmacogenomic profiles as well as molecular properties. Graph convolutional network (GCN) was used to represent and integrate the chemical structure, genetic interactions, drug-target information, and gene expression profiles of cell lines. Insufficient amount of pharmacogenomic data, i.e., drug-induced expression profiles from the LINCS project, was resolved by augmenting the data with the predicted profiles. Our method learned and predicted the Loewe synergy score in the DrugComb database and achieved a better or comparable performance compared to other published methods in a benchmark test. We also investigated contribution of various input features, which highlighted the value of basal gene expression and pharmacogenomic profiles of each cell line. Importantly, DRSPRING (DRug Synergy PRediction by INtegrated GCN) can be applied to any drug pairs and any cell lines, greatly expanding its applicability compared to previous methods.
    MeSH term(s) Humans ; Drug Synergism ; Transcriptome/drug effects ; Transcriptome/genetics ; Deep Learning ; Gene Expression Profiling/methods ; Computational Biology/methods ; Neural Networks, Computer
    Language English
    Publishing date 2024-04-08
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 127557-4
    ISSN 1879-0534 ; 0010-4825
    ISSN (online) 1879-0534
    ISSN 0010-4825
    DOI 10.1016/j.compbiomed.2024.108436
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Hot carrier extraction from plasmonic-photonic superimposed heterostructures.

    Lee, Sanghyuk / Yu, Sungju

    The Journal of chemical physics

    2022  Volume 156, Issue 23, Page(s) 234703

    Abstract: Plasmonic nanostructures have been exploited in photochemical and photocatalytic processes owing to their surface plasmon resonance characteristics. This unique property generates photoinduced potentials and currents capable of driving chemical reactions. ...

    Abstract Plasmonic nanostructures have been exploited in photochemical and photocatalytic processes owing to their surface plasmon resonance characteristics. This unique property generates photoinduced potentials and currents capable of driving chemical reactions. However, these processes are hampered by low photon conversion and utilization efficiencies, which are issues that need to be addressed. In this study, we integrate plasmonic photochemistry and simple tunable heterostructure characteristics of a dielectric photonic crystal for the effective control of electromagnetic energy below the diffraction limit of light. The nanostructure comprises high-density Ag nanoparticles on nanocavity arrays of SrTiO
    Language English
    Publishing date 2022-06-17
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3113-6
    ISSN 1089-7690 ; 0021-9606
    ISSN (online) 1089-7690
    ISSN 0021-9606
    DOI 10.1063/5.0092654
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Cerebro-cerebellar gray matter abnormalities associated with cognitive impairment in patients with recent-onset and chronic schizophrenia.

    Kang, Naok / Chung, Subin / Lee, Sang-Hyuk / Bang, Minji

    Schizophrenia (Heidelberg, Germany)

    2024  Volume 10, Issue 1, Page(s) 11

    Abstract: Although the role of the cerebellum in schizophrenia has gained attention, its contribution to cognitive impairment remains unclear. We aimed to investigate volumetric alterations in the cerebro-cerebellar gray matter (GM) in patients with recent-onset ... ...

    Abstract Although the role of the cerebellum in schizophrenia has gained attention, its contribution to cognitive impairment remains unclear. We aimed to investigate volumetric alterations in the cerebro-cerebellar gray matter (GM) in patients with recent-onset schizophrenia (ROS) and chronic schizophrenia (CS) compared with healthy controls (HCs). Seventy-two ROS, 43 CS, and 127 HC participants were recruited, and high-resolution T1-weighted structural magnetic resonance images of the brain were acquired. We compared cerebellar GM volumes among the groups using voxel-based morphometry and examined the cerebro-cerebellar GM volumetric correlations in participants with schizophrenia. Exploratory correlation analysis investigated the functional relevance of cerebro-cerebellar GM volume alterations to cognitive function in the schizophrenia group. The ROS and CS participants demonstrated smaller cerebellar GM volumes, particularly in Crus I and II, than HCs. Extracted cerebellar GM volumes demonstrated significant positive correlations with the cerebral GM volume in the fronto-temporo-parietal association areas engaged in higher-order association. The exploratory analysis showed that smaller cerebellar GM in the posterior lobe regions was associated with poorer cognitive performance in participants with schizophrenia. Our study suggests that cerebellar pathogenesis is present in the early stages of schizophrenia and interconnected with structural abnormalities in the cerebral cortex. Integrating the cerebellum into the pathogenesis of schizophrenia will help advance our understanding of the disease and identify novel treatment targets concerning dysfunctional cerebro-cerebellar interactions.
    Language English
    Publishing date 2024-01-27
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 3133210-9
    ISSN 2754-6993 ; 2754-6993
    ISSN (online) 2754-6993
    ISSN 2754-6993
    DOI 10.1038/s41537-024-00434-8
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  4. Article ; Online: Positive Effects of Uric Acid on White Matter Microstructures and Treatment Response in Patients With Schizophrenia.

    Bang, Minji / Heo, Yul / Choi, Tai Kiu / Lee, Sang-Hyuk

    Schizophrenia bulletin

    2024  

    Abstract: Background and hypothesis: Schizophrenia involves microstructural changes in white matter (WM) tracts. Oxidative stress is a key factor causing WM damage by hindering oligodendrocyte development and myelin maturation. Uric acid (UA), an endogenous ... ...

    Abstract Background and hypothesis: Schizophrenia involves microstructural changes in white matter (WM) tracts. Oxidative stress is a key factor causing WM damage by hindering oligodendrocyte development and myelin maturation. Uric acid (UA), an endogenous antioxidant, may protect against oxidative stress. We investigated the effect of UA on WM connectivity in antipsychotic-naive or -free patients with early- or chronic-stage schizophrenia.
    Study design: A total of 192 patients with schizophrenia (122 recent-onset [ROS] and 70 chronic [CS]) and 107 healthy controls (HCs) participated in this study. Diffusion tensor imaging data and serum UA levels at baseline were obtained.
    Study results: Fractional anisotropy was lower in the widespread WM regions across the whole brain, and diffusivity measures were higher in both schizophrenia groups than in HCs. The CS group showed lower diffusivity in some WM tracts than the ROS or HC groups. The linear relationship of serum UA levels with axial and mean diffusivity in the right frontal region was significantly different between schizophrenia stages, which was driven by a negative association in the CS group. WM diffusivity associated with serum UA levels correlated with 8-week treatment responses only in patients with CS, suggesting UA to be protective against long-term schizophrenia.
    Conclusions: UA may protect against the WM damage associated with the progression of schizophrenia by reducing oxidative stress and supporting WM repair against oxidative damage. These results provide insights into the positive role of UA and may facilitate the development of novel disease-modifying therapies.
    Language English
    Publishing date 2024-02-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 439173-1
    ISSN 1745-1701 ; 0586-7614
    ISSN (online) 1745-1701
    ISSN 0586-7614
    DOI 10.1093/schbul/sbae008
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  5. Article ; Online: Multimodal neural correlates of dispositional resilience among healthy individuals.

    Kim, Hyun-Ju / Bang, Minji / Pae, Chongwon / Lee, Sang-Hyuk

    Scientific reports

    2024  Volume 14, Issue 1, Page(s) 9875

    Abstract: Resilient individuals are less likely to develop psychiatric disorders despite extreme psychological distress. This study investigated the multimodal structural neural correlates of dispositional resilience among healthy individuals. Participants ... ...

    Abstract Resilient individuals are less likely to develop psychiatric disorders despite extreme psychological distress. This study investigated the multimodal structural neural correlates of dispositional resilience among healthy individuals. Participants included 92 healthy individuals. The Korean version of the Connor-Davidson Resilience Scale and other psychological measures were used. Gray matter volumes (GMVs), cortical thickness, local gyrification index (LGI), and white matter (WM) microstructures were analyzed using voxel-based morphometry, FreeSurfer, and tract-based spatial statistics, respectively. Higher resilient individuals showed significantly higher GMVs in the inferior frontal gyrus (IFG), increased LGI in the insula, and lower fractional anisotropy values in the superior longitudinal fasciculus II (SLF II). These resilience's neural correlates were associated with good quality of life in physical functioning or general health and low levels of depression. Therefore, the GMVs in the IFG, LGI in the insula, and WM microstructures in the SLF II can be associated with resilience that contributes to emotional regulation, empathy, and social cognition.
    MeSH term(s) Humans ; Male ; Female ; Resilience, Psychological ; Adult ; Gray Matter/diagnostic imaging ; Gray Matter/physiology ; Gray Matter/anatomy & histology ; White Matter/diagnostic imaging ; White Matter/physiology ; Young Adult ; Magnetic Resonance Imaging ; Healthy Volunteers ; Brain/physiology ; Brain/diagnostic imaging ; Quality of Life
    Language English
    Publishing date 2024-04-30
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-024-60619-0
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  6. Article: Impact of Intolerance of Uncertainty on Brain Structural Changes in Panic Disorder.

    Ahn, Sungjun / Lee, Sang-Hyuk / Lee, Kang Soo

    Psychiatry investigation

    2023  Volume 20, Issue 11, Page(s) 1069–1076

    Abstract: Objective: This study investigated the impact of intolerance of uncertainty (IU) on structural changes in the brain and symptom severity in patients with panic disorder.: Methods: This study included 90 participants diagnosed with panic disorder. The ...

    Abstract Objective: This study investigated the impact of intolerance of uncertainty (IU) on structural changes in the brain and symptom severity in patients with panic disorder.
    Methods: This study included 90 participants diagnosed with panic disorder. The IU Scale, Panic Disorder Severity Scale (PDSS), Beck Depression Inventory-II (BDI-II), Penn State Worry Questionnaire (PSWQ), Self-Forgiveness Scale (SFS), and Short Form 36 Health Survey (SF) were used. A voxel-wise correlation analysis was conducted to investigate the structural differences in the gray matter.
    Results: As IU increased, the cortical thickness of the right lingual gyrus decreased significantly, while the gray matter volume of the right pars triangularis increased. The cortical thickness of the right lingual gyrus showed a significant negative correlation with the BDI-II score and a positive correlation with the SFS. Additionally, the gray matter volume of the right pars triangularis was positively correlated with the PDSS, PSWQ, and BDI-II scores and negatively correlated with the mental health domain of the SF.
    Conclusion: According to our findings, elevated IU in participants with panic disorder was associated with cortical thinning in the lingual gyrus and increased gray matter volume in the pars triangularis. These structural alterations may also have an impact on perceived quality of life, as well as high levels of depression and anxiety.
    Language English
    Publishing date 2023-11-21
    Publishing country Korea (South)
    Document type Journal Article
    ZDB-ID 2414364-9
    ISSN 1976-3026 ; 1738-3684
    ISSN (online) 1976-3026
    ISSN 1738-3684
    DOI 10.30773/pi.2023.0181
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  7. Article ; Online: Gender differences in anxiety and depressive symptomatology determined by network analysis in panic disorder.

    Kim, Hyun-Ju / Lee, Sang-Hyuk / Pae, Chongwon

    Journal of affective disorders

    2023  Volume 337, Page(s) 94–103

    Abstract: Background: It has been suggested that gender differences in anxiety and depressive symptoms characterize panic disorder (PD) in terms of vulnerability to stressful life events, anxiety, depressive symptom patterns, and brain structure. However, few ... ...

    Abstract Background: It has been suggested that gender differences in anxiety and depressive symptoms characterize panic disorder (PD) in terms of vulnerability to stressful life events, anxiety, depressive symptom patterns, and brain structure. However, few studies have investigated the gender differences in PD using a network approach.
    Methods: This study included 619 participants with PD (313 men). The Panic Disorder Severity Scale, Albany Panic and Phobia Questionnaire, and Beck Depression Inventory-II were used to evaluate symptomatology. To investigate the PD-related white matter (WM) neural correlates, tract-based spatial statistics were used. The PD-related clinical scales and WM neural correlates were included in the network analysis to identify associations between variables. To evaluate network differences between genders, network comparison tests were conducted.
    Results: Our findings revealed that agoraphobia in men was the strongest central symptom. In addition, loss of pleasure, and not anxiety or panic symptoms, was the strongest central symptom in women with PD. The network comparison test revealed that the bridge strength score was higher in agoraphobia and tiredness in men and in self-criticalness in women. Furthermore, in the network that includes neural correlates of WM, the bridge strength score was higher in the cingulate gyrus WM in men and the cingulum hippocampus in women.
    Limitations: Since this is a cross-sectional network study of PD patients, the causal relationship between interactions in this network analysis for both genders may not be accurately determined.
    Conclusion: Network structures of anxiety and depressive symptomatology and related WM neural correlates can differ according to gender in PD patients.
    MeSH term(s) Humans ; Female ; Male ; Panic Disorder/epidemiology ; Panic Disorder/diagnosis ; Sex Factors ; Cross-Sectional Studies ; Anxiety/epidemiology ; Anxiety Disorders ; Agoraphobia
    Language English
    Publishing date 2023-05-27
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 135449-8
    ISSN 1573-2517 ; 0165-0327
    ISSN (online) 1573-2517
    ISSN 0165-0327
    DOI 10.1016/j.jad.2023.05.087
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  8. Article ; Online: Optimal integration of wide field illumination and holographic optical tweezers for multimodal microscopy with ultimate flexibility and versatility.

    Lee, Sang-Hyuk

    Optics express

    2018  Volume 26, Issue 7, Page(s) 8049–8058

    Abstract: We introduce one-of-a-kind optical microscope that we have developed through optimized integration of wide-field and focused-light microscopies. This new instrument has accomplished operation of the same laser for both wide field illumination and ... ...

    Abstract We introduce one-of-a-kind optical microscope that we have developed through optimized integration of wide-field and focused-light microscopies. This new instrument has accomplished operation of the same laser for both wide field illumination and holographic focused beam illumination interchangeably or simultaneously in a way scalable to multiple lasers. We have demonstrated its powerful capability by simultaneously carrying out Epi-fluorescence, total internal reflection fluorescence microscopy, selective plane illumination microscopy, and holographic optical tweezers with five lasers. Our instrument and the optical design will provide researchers across diverse fields, cell-biology and biophysics in particular, with a practical guidance to build an all-around multimodal microscope that will further inspire the development of novel hybrid microscopy experiments.
    Language English
    Publishing date 2018-04-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.26.008049
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  9. Article: Cognitive Behavioral Therapy and Mindfulness-Based Cognitive Therapy for Depressive Disorders.

    Lee, Sang-Hyuk / Cho, Sung Joon

    Advances in experimental medicine and biology

    2021  Volume 1305, Page(s) 295–310

    Abstract: Recently, the importance of cognitive behavioral therapy (CBT) in the treatment of depression is gradually emerging. Particularly, mindfulness meditation has various approaches related to dialectical behavioral therapy (DBT), acceptance and commitment ... ...

    Abstract Recently, the importance of cognitive behavioral therapy (CBT) in the treatment of depression is gradually emerging. Particularly, mindfulness meditation has various approaches related to dialectical behavioral therapy (DBT), acceptance and commitment therapy (ACT), mindfulness-based stress reduction (MBSR), and mindfulness-based cognitive therapy (MBCT), and evidence has been provided that they alleviate depressive symptoms. In particular, as MBCT increases the level of evidence in the treatment of repetitive depressive disorders, guidelines are being recommended to prevent recurrence. Mindfulness may also contribute to improving the patient's symptoms as well as improving the therapeutic relationship with the therapist. For both mindful patients and therapists, positive awareness of internal experiences can be a good way to enrich the mind and overcome depressive disorders.
    MeSH term(s) Acceptance and Commitment Therapy ; Cognitive Behavioral Therapy ; Depressive Disorder/therapy ; Humans ; Mindfulness ; Recurrence ; Treatment Outcome
    Language English
    Publishing date 2021-04-08
    Publishing country United States
    Document type Journal Article
    ISSN 2214-8019 ; 0065-2598
    ISSN (online) 2214-8019
    ISSN 0065-2598
    DOI 10.1007/978-981-33-6044-0_16
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  10. Article ; Online: Author Correction: Self-forgiveness is associated with increased volumes of fusiform gyrus in healthy individuals.

    Kim, Hyun-Ju / Seo, Junghwa / Bang, Minji / Lee, Sang-Hyuk

    Scientific reports

    2023  Volume 13, Issue 1, Page(s) 7246

    Language English
    Publishing date 2023-05-04
    Publishing country England
    Document type Published Erratum
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-023-34497-x
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