A
Akio Kikuchi
Researcher at Tohoku University
Publications - 106
Citations - 3523
Akio Kikuchi is an academic researcher from Tohoku University. The author has contributed to research in topics: Parkinson's disease & Neurodegeneration. The author has an hindex of 31, co-authored 100 publications receiving 3020 citations. Previous affiliations of Akio Kikuchi include Japanese Ministry of Agriculture, Forestry and Fisheries.
Papers
More filters
Journal ArticleDOI
Systemic increase of oxidative nucleic acid damage in Parkinson's disease and multiple system atrophy.
Akio Kikuchi,Atsushi Takeda,Hiroshi Onodera,Teiko Kimpara,Kinya Hisanaga,Nobuyuki Sato,Akihiko Nunomura,Rudy J. Castellani,George Perry,Mark A. Smith,Yasuto Itoyama +10 more
TL;DR: The data presented here suggest that systemic DNA/RNA oxidation is commonly observed in neurodegenerative diseases and implies that female patients with PD show higher levels of oxidative stress, which may explain the faster progression of this disease in females.
Journal ArticleDOI
Severe olfactory dysfunction is a prodromal symptom of dementia associated with Parkinson's disease: a 3 year longitudinal study
Toru Baba,Akio Kikuchi,Kazumi Hirayama,Kazumi Hirayama,Yoshiyuki Nishio,Yoshiyuki Hosokai,Shigenori Kanno,Takafumi Hasegawa,Naoto Sugeno,Masatoshi Konno,Kyoko Suzuki,Kyoko Suzuki,Shoki Takahashi,Hiroshi Fukuda,Masashi Aoki,Yasuto Itoyama,Etsuro Mori,Atsushi Takeda +17 more
TL;DR: It is suggested that brain regions related to olfactory function are closely associated with cognitive decline and that severe hyposmia is a prominent clinical feature that predicts the subsequent development of Parkinson's disease dementia.
Journal ArticleDOI
VPS35 dysfunction impairs lysosomal degradation of α-synuclein and exacerbates neurotoxicity in a Drosophila model of Parkinson's disease
Emiko Miura,Takafumi Hasegawa,Masatoshi Konno,Mari Suzuki,Naoto Sugeno,Nobuhiro Fujikake,Sven Geisler,Mitsuaki Tabuchi,Ryuji Oshima,Akio Kikuchi,Toru Baba,Keiji Wada,Yoshitaka Nagai,Atsushi Takeda,Masashi Aoki +14 more
TL;DR: It is shown that retromer depletion increases the lysosomal turnover of the mannose 6-phosphate receptor, thereby affecting the trafficking of cathepsin D (CTSD) and indicating that the Retromer may play a crucial role in αSYN degradation by modulating the maturation of CTSD and might thereby contribute to the pathogenesis of the disease.
Journal ArticleDOI
Serine 129 Phosphorylation of α-Synuclein Induces Unfolded Protein Response-mediated Cell Death
Naoto Sugeno,Atsushi Takeda,Takafumi Hasegawa,Michiko Kobayashi,Akio Kikuchi,Fumiaki Mori,Koichi Wakabayashi,Yasuto Itoyama +7 more
TL;DR: It seems plausible that α-synuclein toxicity is dependent on the phosphorylation at Ser129 that induces the UPRs, possibly triggered by the disturbed endoplasmic reticulum-Golgi trafficking.
Journal ArticleDOI
The AAA-ATPase VPS4 Regulates Extracellular Secretion and Lysosomal Targeting of α-Synuclein
Takafumi Hasegawa,Masatoshi Konno,Toru Baba,Naoto Sugeno,Akio Kikuchi,Michiko Kobayashi,Emiko Miura,Nobuyuki Tanaka,Keiichi Tamai,Katsutoshi Furukawa,Hiroyuki Arai,Fumiaki Mori,Koichi Wakabayashi,Masashi Aoki,Yasuto Itoyama,Atsushi Takeda +15 more
TL;DR: It is demonstrated that α-synuclein (αSYN), a principal culprit for Lewy pathology in Parkinson's disease (PD), was present in endosomal compartments and detectably secreted into the extracellular milieu, and VPS4, a master regulator of MVB sorting, may serve as a determinant of lysosomal targeting or extacellular secretion of αSYN and thereby contribute to the intercellular propagation of LewY pathology in PD.