p35 deficiency accelerates HMGB-1-mediated neuronal death in the early stages of an Alzheimer's disease mouse model

Ahram Jang, Hyunjeong Liew, Yun Mi Kim, Heesoon Choi, Saeromi Kim, Sang Hyung Lee, Toshio Ohshima, Katsuhiko Mikoshiba, Yoo Hun Suh

    Research output: Contribution to journalArticle

    13 Citations (Scopus)

    Abstract

    The activities of CDK5 and p35 are thought to be important in the pathogenesis of neurodegenerative diseases, including Alzheimer's disease (AD). We studied the effect of p35 deletion in Tg2576 mice, which is an AD animal model. To obtain the desired mice, we crossed p35-/- with Tg2576 mice. The resulting p35-/-/Tg2576 (KO/Tg) mice displayed higher mortality rates and exhibited impaired spatial learning and memory at 6 months of age. Using immunohistochemical and biochemical approaches, we observed a reduction in the expression of pre- and post-synaptic markers such as NMDAR1, synaptophysin and GluR1. In addition, the intensity of MAP-2-positive dendrites extending from neuronal cell bodies was significantly decreased in KO/Tg mice compared with KO/WT and WT/Tg mice. We also detected increased neuronal cell death in the hippocampus, along with thinned and collapsed morphological changes in the alveus region and a dramatic increase in the number of microglial cells. Microglial infiltration in the hippocampus could result in the increased secretion of the soluble high mobility group box-1 protein (HMGB-1). The secretion of HMGB-1 is increased by Aβ, and secretion of HMGB-1 promotes neuronal cell death. Moreover, we found that HMGB-1 secretion induced by Aβ in KO/Tg mice gave rise to ER-mediated cell death. In summary, during the stages of KO/Tg mice model, the microglial infiltration and secretion of soluble HMGB-1 were significantly increased in the hippocampus. These conditions promote neuronal death, synaptic destruction and behavioral deficits.

    Original languageEnglish
    Pages (from-to)829-843
    Number of pages15
    JournalCurrent Alzheimer Research
    Volume10
    Issue number8
    DOIs
    Publication statusPublished - 2013

    Fingerprint

    HMGB1 Protein
    Alzheimer Disease
    Hippocampus
    Cell Death
    Synaptophysin
    Dendrites
    Neurodegenerative Diseases
    Animal Models
    Cell Count
    Mortality

    Keywords

    • Alzheimer's disease
    • HMGB-1
    • Memory impairment
    • Microglial infiltration
    • P35
    • Synaptic dysfunction

    ASJC Scopus subject areas

    • Neurology
    • Clinical Neurology

    Cite this

    p35 deficiency accelerates HMGB-1-mediated neuronal death in the early stages of an Alzheimer's disease mouse model. / Jang, Ahram; Liew, Hyunjeong; Kim, Yun Mi; Choi, Heesoon; Kim, Saeromi; Lee, Sang Hyung; Ohshima, Toshio; Mikoshiba, Katsuhiko; Suh, Yoo Hun.

    In: Current Alzheimer Research, Vol. 10, No. 8, 2013, p. 829-843.

    Research output: Contribution to journalArticle

    Jang, Ahram ; Liew, Hyunjeong ; Kim, Yun Mi ; Choi, Heesoon ; Kim, Saeromi ; Lee, Sang Hyung ; Ohshima, Toshio ; Mikoshiba, Katsuhiko ; Suh, Yoo Hun. / p35 deficiency accelerates HMGB-1-mediated neuronal death in the early stages of an Alzheimer's disease mouse model. In: Current Alzheimer Research. 2013 ; Vol. 10, No. 8. pp. 829-843.
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    abstract = "The activities of CDK5 and p35 are thought to be important in the pathogenesis of neurodegenerative diseases, including Alzheimer's disease (AD). We studied the effect of p35 deletion in Tg2576 mice, which is an AD animal model. To obtain the desired mice, we crossed p35-/- with Tg2576 mice. The resulting p35-/-/Tg2576 (KO/Tg) mice displayed higher mortality rates and exhibited impaired spatial learning and memory at 6 months of age. Using immunohistochemical and biochemical approaches, we observed a reduction in the expression of pre- and post-synaptic markers such as NMDAR1, synaptophysin and GluR1. In addition, the intensity of MAP-2-positive dendrites extending from neuronal cell bodies was significantly decreased in KO/Tg mice compared with KO/WT and WT/Tg mice. We also detected increased neuronal cell death in the hippocampus, along with thinned and collapsed morphological changes in the alveus region and a dramatic increase in the number of microglial cells. Microglial infiltration in the hippocampus could result in the increased secretion of the soluble high mobility group box-1 protein (HMGB-1). The secretion of HMGB-1 is increased by Aβ, and secretion of HMGB-1 promotes neuronal cell death. Moreover, we found that HMGB-1 secretion induced by Aβ in KO/Tg mice gave rise to ER-mediated cell death. In summary, during the stages of KO/Tg mice model, the microglial infiltration and secretion of soluble HMGB-1 were significantly increased in the hippocampus. These conditions promote neuronal death, synaptic destruction and behavioral deficits.",
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    AU - Kim, Saeromi

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    AU - Suh, Yoo Hun

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