Details

Autor(en) / Beteiligte

• Niu, Jingwen
• Yu, Mei
• Wang, Chunyan
• Xu, Zhiheng

Titel

Leucine-rich repeat kinase 2 disturbs mitochondrial dynamics via Dynamin-like protein

Ist Teil von

• Journal of neurochemistry, 2012-08, Vol.122 (3), p.650-658

Ort / Verlag

Oxford, UK: Blackwell Publishing Ltd

Erscheinungsjahr

2012

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• J. Neurochem. (2012) 122, 650–658. Mutations in Leucine‐rich repeat kinase 2 (LRRK2) are the leading causes of genetically inherited Parkinson’s disease (PD) identified so far. The underlying mechanism whereby missense alterations in LRRK2 initiate neurodegeneration remains largely unclear. Mitochondrial dysfunction has been recognized to contribute to the pathogenesis of both sporadic and familial PD. The pathogenic gain‐of‐function mutant form of LRRK2, LRRK2 G2019S, is associated with elevated kinase activity and PD. Here we show that LRRK2 G2019S can cause defects in the morphology and dynamics of mitochondria in cortical neurons. In neurons, endogenous LRRK2 and the mitochondrial fission factor Dynamin like protein 1 (DLP1) interact with and partially co‐localize with each other. DLP1 plays an essential role in LRRK2‐induced mitochondrial fission. In support of this, expression of LRRK2 leads to the translocation of DLP1 from the cytosol to the mitochondria and knockdown of DLP1 expression inhibits LRRK2‐induced mitochondrial fission. In addition, co‐expression of LRRK2 and DLP1 induces mitochondrial clearance. Furthermore, we have found that expression of LRRK2 leads to increased reactive oxygen species levels in cells. Taken together, our results provide insights into the pathobiology of LRRK2 and suggest that LRRK2 G2019S may induce neuronal dysfunction or cell death by disturbing normal mitochondrial fission/fusion dynamics and function. Mutations in LRRK2 are the leading causes of genetically inherited Parkinson’s disease identified so far. We show that LRRK2 and mitochondrial fission factor DLP1 interact with and partially co‐localize with each other. Expression of the pathogenic LRRK2 mutant, LRRK2 G2019S, leads to translocation of DLP1 from cytosol to mitochondria and mitochondrial fission. Knockdown of DLP1 expression inhibits LRRK2‐induced mitochondrial fission. Our results suggest that LRRK2 G2019S may induce neuronal dysfunction or cell death by disturbing normal mitochondrial fission/fusion dynamics and function.