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  1. AU="Chun, Heejung"
  2. AU="Iwasaki, Yuma"
  3. AU="Szczepaniak, Jessica"
  4. AU="Huang, Chun-Mei"
  5. AU="Zhang, Weijng"
  6. AU="Venrdramin, A."
  7. AU="Xu, Hai-Chao"
  8. AU="Imad, Nasser"
  9. AU="Batiridou, Agapi L"
  10. AU="Segal, Matt"
  11. AU="Russell E. Lewis"
  12. AU="Kietselaer, Bas"
  13. AU="Edelson, Brian T"
  14. AU="Elliott, Bruce M"
  15. AU="Pérez, René"
  16. AU="Lourdes Diaz Rodriguez"
  17. AU="Choi, Kai Chow"
  18. AU="Brandolini, Jury"
  19. AU="Yom, Jina"
  20. AU="Sue Casey"
  21. AU="Arimura, Takashi"
  22. AU="Kizilkilic, Osman"

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  1. Artikel ; Online: Role of spinal astrocytes through the perisynaptic astrocytic process in pathological pain.

    Ko, Hyoung-Gon / Chun, Heejung / Han, Seunghyo / Kaang, Bong-Kiun

    Molecular brain

    2023  Band 16, Heft 1, Seite(n) 81

    Abstract: Pathological pain is caused by abnormal activity in the neural circuit that transmits nociceptive stimuli. Beyond homeostatic functions, astrocytes actively participate in regulating synaptic transmission as members of tripartite synapses. The ... ...

    Abstract Pathological pain is caused by abnormal activity in the neural circuit that transmits nociceptive stimuli. Beyond homeostatic functions, astrocytes actively participate in regulating synaptic transmission as members of tripartite synapses. The perisynaptic astrocytic process (PAP) is the key structure that allows astrocytes to play these roles and not only physically supports synapse formation through cell adhesion molecules (CAMs) but also regulates the efficiency of chemical signaling. Accumulating evidence has revealed that spinal astrocytes are involved in pathological pain by modulating the efficacy of neurotransmitters such as glutamate and GABA through transporters located in the PAP and by directly regulating synaptic transmission through various gliotransmitters. Although various CAMs contribute to pathological pain, insufficient evidence is available as to whether astrocytic CAMs also have this role. Therefore, more in-depth research is needed on how pathological pain is induced and maintained by astrocytes, especially in the PAP surrounding the synapse, and this will subsequently increase our understanding and treatment of pathological pain.
    Mesh-Begriff(e) Humans ; Astrocytes/metabolism ; Synapses/metabolism ; Synaptic Transmission/physiology ; Pain/metabolism ; Glutamic Acid/metabolism
    Chemische Substanzen Glutamic Acid (3KX376GY7L)
    Sprache Englisch
    Erscheinungsdatum 2023-12-13
    Erscheinungsland England
    Dokumenttyp Journal Article ; Review
    ZDB-ID 2436057-0
    ISSN 1756-6606 ; 1756-6606
    ISSN (online) 1756-6606
    ISSN 1756-6606
    DOI 10.1186/s13041-023-01069-z
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  2. Artikel: Understanding the Experiences of Mothers with Academic Socialization in South Korea: A Phenomenological Approach.

    Chun, Heejung / Son, Hoyang / Ham, Kyung Ae

    Journal of child and family studies

    2022  , Seite(n) 1–15

    Abstract: We explored academic socialization experiences of nine mothers in South Korea. Academic socialization has been defined as parents' practices that transfer their educational expectations, values, and aspirations to their children (Hill, 2001). Adopting ... ...

    Abstract We explored academic socialization experiences of nine mothers in South Korea. Academic socialization has been defined as parents' practices that transfer their educational expectations, values, and aspirations to their children (Hill, 2001). Adopting Giorgi's phenomenological research method (1997), we interviewed nine mothers who had recently prepared their children to get into college. The interviews were focused on the ways in which they intervened in the academic process when their children were in high school. The data analysis proceeded along the four steps suggested by Giorgi (1997). The analysis resulted in the 12 constituents, which are the themes underlying the essential structure of the academic socialization experiences. The findings showed that during the academic socialization process, all participating mothers set high academic standards for their children. The mothers actively engaged in supporting their children through shadow education (i.e., supplementary private education) to strengthen their academic competitiveness. Further, the mothers found themselves competing with other mothers regarding the academic achievement of their children. The mothers rather than their children took initiatives for decision makings of academic matters. Some of their practices were noticed to have compromised the autonomy of their children. The mothers appeared to fulfill their needs that prove their self-worth by raising their children to be competent. The significance and implications of these results were discussed.
    Sprache Englisch
    Erscheinungsdatum 2022-11-07
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 2016750-7
    ISSN 1573-2843 ; 1062-1024
    ISSN (online) 1573-2843
    ISSN 1062-1024
    DOI 10.1007/s10826-022-02476-x
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  3. Artikel ; Online: A parental involvement and academic socialization model: A cultural approach.

    Chun, Heejung / Devall, Esther

    School psychology (Washington, D.C.)

    2019  Band 34, Heft 5, Seite(n) 555–565

    Abstract: Utilizing ecological theory and multiple world theory, the current study investigated the effects of cultural factors (i.e., Familismo and school climate), parental involvement, and academic socialization on academic achievement of Latina/o secondary ... ...

    Abstract Utilizing ecological theory and multiple world theory, the current study investigated the effects of cultural factors (i.e., Familismo and school climate), parental involvement, and academic socialization on academic achievement of Latina/o secondary school students. This study had 2 primary foci. First, this study sought to address how the cultural value of Familismo and the interaction between home and school cultures play a role in parental involvement and academic achievement. Second, the effect of academic socialization was tested as a distinct factor from parental involvement. Data were collected from 116 Latina/o students living along the U.S./Mexico border. This study tested a path model that explained 30% of the variance in academic achievement, 25% of the variance in academic socialization, and 21% of the variance in parental involvement. Among 8 proposed relationships, 6 were supported while 2 were not. The mediating effects of parental involvement and academic socialization were supported that connect Familismo, school climate, and academic achievement. Implications for Latina/o secondary students who navigate between the different cultural worlds of home and school are discussed. (PsycINFO Database Record (c) 2019 APA, all rights reserved).
    Mesh-Begriff(e) Academic Success ; Adolescent ; Child ; Culture ; Female ; Hispanic Americans ; Humans ; Male ; Mexican Americans ; Models, Psychological ; Parenting/ethnology ; Social Values/ethnology ; Socialization
    Sprache Englisch
    Erscheinungsdatum 2019-07-25
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ISSN 2578-4226
    ISSN (online) 2578-4226
    DOI 10.1037/spq0000330
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel ; Online: Reactive astrocytes in Alzheimer's disease: A double-edged sword.

    Chun, Heejung / Lee, C Justin

    Neuroscience research

    2018  Band 126, Seite(n) 44–52

    Abstract: Alzheimer's disease (AD) is a chronic and fatal disease, in which neuronal damage at its late stage cannot be easily reversed. Because AD progression is caused by multiple factors including diverse cellular processes, studies on AD pathogenesis at the ... ...

    Abstract Alzheimer's disease (AD) is a chronic and fatal disease, in which neuronal damage at its late stage cannot be easily reversed. Because AD progression is caused by multiple factors including diverse cellular processes, studies on AD pathogenesis at the molecular and cellular level are challenging. Based on the lessons from unsuccessful neuron-focused research for an AD cure, non-cell autonomous mechanisms including brain inflammation and reactive astrocytes have recently been in the spotlight as potential therapeutic targets for AD. Studies have shown that reactive astrocytes are not only the result of inflammatory defense reactions, but also an active catabolic decomposer that acts by taking up amyloid beta toxins. Here, we give an overview of the characteristics of reactive astrocytes as pathological features of AD. Reactive astrocytes exert biphasic effects, that is, beneficial or detrimental depending on multiple factors. Many efforts have been put forth for defining and characterizing molecular signatures for the beneficial and detrimental reactive astrocytes. In the foreseeable future, manipulating and targeting each established molecular signature should have profound therapeutic implications for the treatment of AD.
    Mesh-Begriff(e) Alzheimer Disease/complications ; Alzheimer Disease/metabolism ; Amyloid beta-Peptides/metabolism ; Animals ; Astrocytes/metabolism ; Brain/metabolism ; Brain/physiopathology ; Disease Progression ; Encephalitis/complications ; Encephalitis/metabolism ; Humans ; Oxidative Stress ; Reactive Oxygen Species/metabolism
    Chemische Substanzen Amyloid beta-Peptides ; Reactive Oxygen Species
    Sprache Englisch
    Erscheinungsdatum 2018-01
    Erscheinungsland Ireland
    Dokumenttyp Journal Article ; Review
    ZDB-ID 605842-5
    ISSN 1872-8111 ; 0168-0102 ; 0921-8696
    ISSN (online) 1872-8111
    ISSN 0168-0102 ; 0921-8696
    DOI 10.1016/j.neures.2017.11.012
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  5. Artikel ; Online: Inhibition of monoamine oxidase B prevents reactive astrogliosis and scar formation in stab wound injury model.

    Chun, Heejung / Lim, Jiwoon / Park, Ki Duk / Lee, C Justin

    Glia

    2021  Band 70, Heft 2, Seite(n) 354–367

    Abstract: Reactive astrocytes manifest molecular, structural, and functional alterations under various pathological conditions. We have previously demonstrated that the reactive astrocytes of the stab wound injury model (STAB) display aberrant cellular gamma- ... ...

    Abstract Reactive astrocytes manifest molecular, structural, and functional alterations under various pathological conditions. We have previously demonstrated that the reactive astrocytes of the stab wound injury model (STAB) display aberrant cellular gamma-aminobutyric acid (GABA) content and tonic GABA release, whereas the active astrocytes under enriched environment (EE) express high levels of proBDNF. However, the role of monoamine oxidase B (MAO-B) in reactive astrogliosis and hypertrophy still remains unknown. Here, we investigate the role of MAO-B, a GABA-producing enzyme, in reactive astrogliosis in STAB. We observed that the genetic removal of MAO-B significantly reduced the hypertrophy, scar formation, and GABA production of reactive astrocytes, whereas the MAO-B overexpression under glial fibrillary acidic protein (GFAP) promoter enhanced the levels of GFAP and GABA. Furthermore, we found that one of the by-products of the MAO-B action, H
    Mesh-Begriff(e) Astrocytes/metabolism ; Cicatrix/metabolism ; Cicatrix/pathology ; Cicatrix/prevention & control ; Glial Fibrillary Acidic Protein/metabolism ; Gliosis/metabolism ; Humans ; Monoamine Oxidase/genetics ; Monoamine Oxidase/metabolism ; Monoamine Oxidase/pharmacology ; Wounds, Stab/pathology
    Chemische Substanzen Glial Fibrillary Acidic Protein ; Monoamine Oxidase (EC 1.4.3.4)
    Sprache Englisch
    Erscheinungsdatum 2021-10-29
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 639414-0
    ISSN 1098-1136 ; 0894-1491
    ISSN (online) 1098-1136
    ISSN 0894-1491
    DOI 10.1002/glia.24110
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  6. Artikel ; Online: KDS2010, a reversible MAO-B inhibitor, extends the lifetime of neural probes by preventing glial scar formation.

    Chae, Uikyu / Chun, Heejung / Lim, Jiwoon / Shin, Hyogeun / Smith, Wesley Charles / Choi, Ji Won / Park, Ki Duk / Lee, C Justin / Cho, Il-Joo

    Glia

    2024  Band 72, Heft 4, Seite(n) 748–758

    Abstract: Implantable neural probes have been extensively utilized in the fields of neurocircuitry, systems neuroscience, and brain-computer interface. However, the long-term functionality of these devices is hampered by the formation of glial scar and ... ...

    Abstract Implantable neural probes have been extensively utilized in the fields of neurocircuitry, systems neuroscience, and brain-computer interface. However, the long-term functionality of these devices is hampered by the formation of glial scar and astrogliosis at the surface of electrodes. In this study, we administered KDS2010, a recently developed reversible MAO-B inhibitor, to mice through ad libitum drinking in order to prevent glial scar formation and astrogliosis. The administration of KDS2010 allowed long-term recordings of neural signals with implantable devices, which remained stable over a period of 6 months and even restored diminished neural signals after probe implantation. KDS2010 effectively prevented the formation of glial scar, which consists of reactive astrocytes and activated microglia around the implant. Furthermore, it restored neural activity by disinhibiting astrocytic MAO-B dependent tonic GABA inhibition induced by astrogliosis. We suggest that the use of KDS2010 is a promising approach to prevent glial scar formation around the implant, thereby enabling long-term functionality of neural devices.
    Mesh-Begriff(e) Mice ; Animals ; Gliosis/drug therapy ; Gliosis/prevention & control ; Astrocytes ; Monoamine Oxidase Inhibitors/pharmacology ; Monoamine Oxidase/pharmacology ; Macrophages
    Chemische Substanzen Monoamine Oxidase Inhibitors ; Monoamine Oxidase (EC 1.4.3.4)
    Sprache Englisch
    Erscheinungsdatum 2024-01-10
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 639414-0
    ISSN 1098-1136 ; 0894-1491
    ISSN (online) 1098-1136
    ISSN 0894-1491
    DOI 10.1002/glia.24500
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  7. Artikel ; Online: The "immigrant paradox" phenomenon: assessing problem behaviors and risk factors among immigrant and native adolescents.

    Chun, Heejung / Mobley, Michael

    The journal of primary prevention

    2014  Band 35, Heft 5, Seite(n) 339–356

    Abstract: We investigated the "immigrant paradox" phenomenon by examining differences in problem behavior engagement and exposure to risk factors across four adolescent groups: 1,157 first-generation, 1,498 second-generation, and 3,316 White and minority third or ... ...

    Abstract We investigated the "immigrant paradox" phenomenon by examining differences in problem behavior engagement and exposure to risk factors across four adolescent groups: 1,157 first-generation, 1,498 second-generation, and 3,316 White and minority third or higher generations. Latent mean differences in problem behavior engagement (i.e., academic failure, aggression, and substance use) and risk factors (i.e., low socioeconomic status, poor family relationship, and low sense of school belonging) were associated with significant differences across adolescent groups. Results supported the generational status effect by demonstrating sequentially greater adolescent problem behavior engagement. However, the difference in exposure to risk factors across adolescent groups only partially supported the immigrant paradox. Further, the multiple group analysis of the relationships between risk factors and engagement in problem behaviors showed increased susceptibility among second generation immigrants for substance use, White natives for academic failure and substance use, and minority natives for physical aggression. Study findings have implications for understanding how the immigrant paradox leads to different adjustment patterns and problem behavior manifestations among immigrant and native adolescents.
    Mesh-Begriff(e) Adolescent ; Adolescent Behavior/ethnology ; Aggression ; Child ; Cohort Effect ; Emigrants and Immigrants/psychology ; Ethnic Groups/psychology ; European Continental Ancestry Group/psychology ; Family Relations/ethnology ; Female ; Humans ; Male ; Psychological Distance ; Risk Factors ; Risk-Taking ; Socioeconomic Factors ; Substance-Related Disorders/epidemiology ; United States ; Young Adult
    Sprache Englisch
    Erscheinungsdatum 2014-07-20
    Erscheinungsland Netherlands
    Dokumenttyp Journal Article
    ZDB-ID 622512-3
    ISSN 1573-6547 ; 0278-095X
    ISSN (online) 1573-6547
    ISSN 0278-095X
    DOI 10.1007/s10935-014-0359-y
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  8. Artikel: Astrocyte Specificity and Coverage of hGFAP-CreERT2 [Tg(GFAP-Cre/ERT2)13Kdmc] Mouse Line in Various Brain Regions.

    Park, Yongmin Mason / Chun, Heejung / Shin, Jeong-Im / Lee, C Justin

    Experimental neurobiology

    2018  Band 27, Heft 6, Seite(n) 508–525

    Abstract: Astrocyte is the most abundant cell type in the central nervous system and its importance has been increasingly recognized in the brain pathophysiology. To ... ...

    Abstract Astrocyte is the most abundant cell type in the central nervous system and its importance has been increasingly recognized in the brain pathophysiology. To study
    Sprache Englisch
    Erscheinungsdatum 2018-12-28
    Erscheinungsland Korea (South)
    Dokumenttyp Journal Article
    ZDB-ID 2639017-6
    ISSN 2093-8144 ; 1226-2560
    ISSN (online) 2093-8144
    ISSN 1226-2560
    DOI 10.5607/en.2018.27.6.508
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  9. Artikel: Elucidating the Interactive Roles of Glia in Alzheimer's Disease Using Established and Newly Developed Experimental Models.

    Chun, Heejung / Marriott, Ian / Lee, C Justin / Cho, Hansang

    Frontiers in neurology

    2018  Band 9, Seite(n) 797

    Abstract: Alzheimer's disease (AD) is an irreversible neurodegenerative illness and the exact etiology of the disease remains unknown. It is characterized by long preclinical and prodromal phases with pathological features including an accumulation of amyloid-beta ...

    Abstract Alzheimer's disease (AD) is an irreversible neurodegenerative illness and the exact etiology of the disease remains unknown. It is characterized by long preclinical and prodromal phases with pathological features including an accumulation of amyloid-beta (Aβ) peptides into extracellular Aβ plaques in the brain parenchyma and the formation of intracellular neurofibrillary tangles (NFTs) within neurons as a result of abnormal phosphorylation of microtubule-associated tau proteins. In addition, prominent activation of innate immune cells is also observed and/or followed by marked neuroinflammation. While such neuroinflammatory responses may function in a neuroprotective manner by clearing neurotoxic factors, they can also be neurotoxic by contributing to neurodegeneration
    Sprache Englisch
    Erscheinungsdatum 2018-09-26
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article ; Review
    ZDB-ID 2564214-5
    ISSN 1664-2295
    ISSN 1664-2295
    DOI 10.3389/fneur.2018.00797
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  10. Artikel: Testing Jessor's problem behavior theory and syndrome: a nationally representative comparative sample of Latino and African American adolescents.

    Mobley, Michael / Chun, Heejung

    Cultural diversity & ethnic minority psychology

    2013  Band 19, Heft 2, Seite(n) 190–199

    Abstract: Based on Jessor's problem behavior theory (PBT; R. Jessor, 1987, Problem-behavior theory, psychosocial development, and adolescent problem drinking, British Journal of Addiction, Vol. 82, pp. 331-342), the comparability of a second-order problem behavior ...

    Abstract Based on Jessor's problem behavior theory (PBT; R. Jessor, 1987, Problem-behavior theory, psychosocial development, and adolescent problem drinking, British Journal of Addiction, Vol. 82, pp. 331-342), the comparability of a second-order problem behavior model (SPBM) was investigated employing structural equation modeling (SEM) and latent mean differences in problem behavior engagement were examined among racial/ethnic adolescents. Within a span of nearly 25 years, this study represents the first nationally representative sample of Latino and African American adolescents utilized in testing Jessor's PBT and problem behavior syndrome (PBS). Using a sample of 5,831 Latino, African American, and European American adolescents drawn from the National Longitudinal Study of Adolescent Health, a series of invariance tests evidenced support for Jessor's PBT and PBS. Latent mean difference test results evidenced significant differences in problem behaviors (e.g., academic failure [AF], aggression [AG], substance use [SU], and risky sexual activity[RSA]) across racial/ethnic adolescent groups, which could be explained partially by PBS. A discussion of findings, limitations, and recommendations for future research is presented.
    Mesh-Begriff(e) Adolescent ; Adolescent Behavior/psychology ; African Americans/psychology ; Alcohol Drinking/ethnology ; Alcohol Drinking/psychology ; Female ; Hispanic Americans/psychology ; Humans ; Male ; Models, Psychological ; Psychological Theory ; Sexual Behavior/ethnology ; Sexual Behavior/psychology ; Sexual Behavior/statistics & numerical data ; Social Behavior Disorders/ethnology ; Social Behavior Disorders/psychology ; Social Environment ; Social Identification ; Social Support ; Substance-Related Disorders/ethnology ; Substance-Related Disorders/psychology ; United States ; Violence/psychology ; Violence/statistics & numerical data
    Sprache Englisch
    Erscheinungsdatum 2013-04
    Erscheinungsland United States
    Dokumenttyp Comparative Study ; Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 1463411-9
    ISSN 1939-0106 ; 1099-9809
    ISSN (online) 1939-0106
    ISSN 1099-9809
    DOI 10.1037/a0031916
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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