Effects of lysosomal instability on the non-apoptotic Purkinje cell death
Project/Area Number |
17K08522
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
General anatomy (including histology/embryology)
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Research Institution | Juntendo University |
Principal Investigator |
Koike Masato 順天堂大学, 医学(系)研究科(研究院), 教授 (80347210)
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Project Period (FY) |
2017-04-01 – 2020-03-31
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Project Status |
Completed (Fiscal Year 2019)
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Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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Keywords | オートファジー / リソソーム / カテプシン / ゴルジ体 / 小脳 / プルキンエ細胞 / 細胞死 / 軸索変性 / LC3 / 免疫電子顕微鏡 / 凍結超薄切片法 / カテプシンD |
Outline of Final Research Achievements |
We generated mice with a cathepsin D (CTSD) deficiency specifically in the Purkinje (PCs) and basket cells (BCs) and compared their phenotypes with those of PC and BC-selective Atg7-deficient mice. In both strains of mice, PCs underwent degeneration, but the CTSD-deficient PCs disappeared more rapidly than their Atg7-deficient counterparts. The neuronal cell death of CTSD- and Atg7-deficient PCs was distinct from apoptosis. Axonal spheroids and the swelling of presynaptic terminals of PCs were more pronounced in Atg7-deficient PCs than in CTSD-deficient PCs.These results suggested that PCs were more vulnerable to CTSD deficiency in lysosomes than to autophagy impairment, and this vulnerability does not depend on the severity of axonal swelling. We also generated mice with a Golgi pH regulator (GPHR) deficiency specifically in the PCs and BCs and found that PCs from the mutant mice exhibited axonal degeneration and progressive cell loss.
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Academic Significance and Societal Importance of the Research Achievements |
ヒトではカテプシンDの遺伝子変異は最も重篤なタイプの神経性セロイドリポフスチン蓄積症発症に関与する。同患者では、カテプシンDの活性が低いほど症状が重篤であるが、全ての症例において小脳失調が認められる。本研究成果は、神経性セロイドリポフスチン蓄積症における神経変性のメカニズムの一端を明らかにするもので、同疾患の理解につながる社会的意義を有する。 ゴルジ体の機能不全については、これまでゴルジ体を特異的に制御する薬剤が存在せず、神経変性疾患におけるゴルジ体の構造異常がその原因なのかを知る術がなかった。今回のGPHR欠損マウスの解析で、ゴルジ体の異常と神経変性との直接的な因果関係を明らかにした。
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Report
(4 results)
Research Products
(57 results)
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[Journal Article] a-Synuclein BAC transgenic mice exhibit RBD-like behaviour and hyposmia:a prodromal Parkinson’s disease model2020
Author(s)
Taguchi T, Ikuno M, Hondo M, Parajuli LK, Taguchi K, Ueda J, Sawamura M, Okuda S, Nakanishi E, Hara J, Uemura N, Hatanaka Y, Ayaki T, Matsuzawa S, Tanaka M, El-Agnaf OMA, Koike M, Yanagisawa M, Uemura MT, Yamakado H, Takahashi R
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Journal Title
BRAIN
Volume: 143
Issue: 1
Pages: 249-265
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Peroxisomes control mitochondrial dynamics and the mitochondrion-dependent pathway of apoptosis.2019
Author(s)
Tanaka, H., *Okazaki, T., Aoyama, S., Yokota, M., Koike, M., Okada, Y., Fujiki, Y., and Gotoh, Y.
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Journal Title
J. Cell Sci.
Volume: -
Issue: 11
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Necroptosis of intestinal epithelial cells induces type 3 innate lymphoid cell-dependent lethal ileitis.2019
Author(s)
Shindo R, Ohmuraya M, Komazawa-Sakon S, Miyake S, Deguchi Y, Yamazaki S, Nishina T, Yoshimoto T, Kakuta S, Koike M, Uchiyama Y, Konishi H, Kiyama H, Mikami T, Moriwaki K, Araki K, Nakano H.
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Journal Title
iScience
Volume: 15
Pages: 536-551
DOI
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Peer Reviewed / Open Access
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[Journal Article] Loss of autophagy impairs physiological steatosis by accumulation of NCoR1.2019
Author(s)
Takahashi SS, Sou YS, Saito T, Kuma A, Yabe T, Sugiura Y, Lee HC, Suematsu M, Yokomizo T, Koike M, Terai S, Mizushima N, Waguri S, Komatsu M.
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Journal Title
Life Sci Alliance.
Volume: 3
Issue: 1
Pages: 201900513-201900513
DOI
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Peer Reviewed / Open Access
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[Journal Article] Defective autophagy in vascular smooth muscle cells enhances cell death and atherosclerosis.2018
Author(s)
Osonoi Y, Mita T, Azuma K, Nakajima K, Masuyama A, Goto H, Nishida Y, Miyatsuka T, Fujitani Y, Koike M, Mitsumata M, Watada H.
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Journal Title
Autophagy
Volume: 14
Issue: 11
Pages: 1991-2006
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Molecular mechanisms of Streptococcus pneumoniae-targeted autophagy via pneumolysin, Golgi-resident Rab41, and Nedd4-1-mediated K63-linked ubiquitination2018
Author(s)
Ogawa M, Matsuda R, Takada N, Tomokiyo M, Yamamoto S, Shizukusihi S, Yamaji T, Yoshikawa Y, Yoshida M, Tanida I, Koike M, Murai M, Morita H, Takeyama H, Ryo A, Guan JL, Yamamoto M, Inoue JI, Yanagawa T, Fukuda M, Kawabe H, Ohnishi M
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Journal Title
Cellular Microbiology
Volume: e12846
Issue: 8
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Presentation] Multi-scale imaging from the whole brain level to the ultrastructure level by using a modified scales method2019
Author(s)
H Hioki, K Yamauchi, S Okamoto, K Isa, Y Ishida, A Takenaka, M Takahashi, J Hwang, A Yoshida, Y Uchiyama, M Koike, T Isa, T Furuta
Organizer
The 49th Society for Neuroscience Annual Meeting (Neuroscience 2019)
Related Report
Int'l Joint Research
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[Presentation] Cerebellar neurodegeneration and neuronal circuit remodeling in Golgi pH regulator-deficient mice2019
Author(s)
YS Sou, S Kakuta, Y Kamikubo, K Niisato, T Sakurai, LK Parajuli, I Tanida, H Saito, N Suzuki, K Sakimura, Y Maeda, T Kinoshita, Y Uchiyama, M Koike
Organizer
The 49th Society for Neuroscience Annual Meeting (Neuroscience 2019)
Related Report
Int'l Joint Research
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[Presentation] GBA haploinsufficiency accelerated alpha synuclein pathology with altered lipid metabolism in a premotor model of Parkinson’s disease2018
Author(s)
Yamakado H, Ikuno M, Akiyama K, Parajuli LK, Taguchi K, Hara J, Uemura N, Hatanaka Y, Higaki K, Tanaka M, Koike M Hirabayashi Y, Takahashi R
Organizer
22nd International Congress of Parkinson's Disease and Movement Disorders
Related Report
Int'l Joint Research
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