Amyloid-β causes memory impairment by disturbing the JAK2/STAT3 axis in hippocampal neurons

T. Chiba, M. Yamada, J. Sasabe, K. Terashita, M. Shimoda, M. Matsuoka, Sadakazu Aiso

研究成果: Article

119 引用 (Scopus)

抄録

Elevation of intracranial soluble amyloid-β (Aβ) levels has been implicated in the pathogenesis of Alzheimer's disease (AD). Intracellular events in neurons, which lead to memory loss in AD, however, remain elusive. Humanin (HN) is a short neuroprotective peptide abolishing Aβ neurotoxicity. Recently, we found that HN derivatives activate the Janus kinase 2 (JAK2)/signal transducer and activator of transcription 3 (STAT3) signaling axis. We here report that an HN derivative named colivelin completely restored cognitive function in an AD model (Tg2576) by activating the JAK2/STAT3 axis. In accordance, immunofluorescence staining using a specific antibody against phospho- (p-) STAT3 revealed that p-STAT3 levels in hippocampal neurons age-dependently decreased in both AD model mice and AD patients. Intracerebroventricular administration of Aβ1-42 downregulated p-STAT3 whereas passive immunization with anti-Aβ antibody conversely restored hippocampal p-STAT3 levels in Tg2576 mice, paralleling the decrease in the brain Aβ burden. Aβ1-42 consistently modulated p-STAT3 levels in primary neurons. Pharmacological inhibition of the JAK2/STAT3 axis not only induced significant loss of spatial working memory by downregulating an acetylcholine-producing enzyme choline acetyltransferase but also desensitized the M1-type muscarinic acetylcholine receptor. Thus, we propose a novel theory accounting for memory impairment related to AD: Aβ-dependent inactivation of the JAK2/STAT3 axis causes memory loss through cholinergic dysfunction. Our findings provide not only a novel pathological hallmark in AD but also a novel target in AD therapy.

元の言語English
ページ(範囲)206-222
ページ数17
ジャーナルMolecular Psychiatry
14
発行部数2
DOI
出版物ステータスPublished - 2009 2 1
外部発表Yes

ASJC Scopus subject areas

  • Molecular Biology
  • Psychiatry and Mental health
  • Cellular and Molecular Neuroscience

これを引用

Amyloid-β causes memory impairment by disturbing the JAK2/STAT3 axis in hippocampal neurons. / Chiba, T.; Yamada, M.; Sasabe, J.; Terashita, K.; Shimoda, M.; Matsuoka, M.; Aiso, Sadakazu.

:: Molecular Psychiatry, 巻 14, 番号 2, 01.02.2009, p. 206-222.

研究成果: Article

Chiba, T, Yamada, M, Sasabe, J, Terashita, K, Shimoda, M, Matsuoka, M & Aiso, S 2009, 'Amyloid-β causes memory impairment by disturbing the JAK2/STAT3 axis in hippocampal neurons', Molecular Psychiatry, 巻. 14, 番号 2, pp. 206-222. https://doi.org/10.1038/mp.2008.105
Chiba T, Yamada M, Sasabe J, Terashita K, Shimoda M, Matsuoka M その他. Amyloid-β causes memory impairment by disturbing the JAK2/STAT3 axis in hippocampal neurons. Molecular Psychiatry. 2009 2 1;14(2):206-222. https://doi.org/10.1038/mp.2008.105
Chiba, T. ; Yamada, M. ; Sasabe, J. ; Terashita, K. ; Shimoda, M. ; Matsuoka, M. ; Aiso, Sadakazu. / Amyloid-β causes memory impairment by disturbing the JAK2/STAT3 axis in hippocampal neurons. :: Molecular Psychiatry. 2009 ; 巻 14, 番号 2. pp. 206-222.
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