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A link between LRRK2, autophagy and NAADP-mediated endolysosomal calcium signalling

Patricia Gómez-Suaga1, Grant C Churchill, Sandip Patel

  • 1Institute of Parasitology and Biomedicine 'López-Neyra', Consejo Superior de Investigaciones Científicas (CSIC), Avda del Conocimiento s/n, 18100 Granada, Spain.

Biochemical Society Transactions
|September 20, 2012
PubMed

Insights

Mutations in leucine-rich repeat kinase 2 (LRRK2) are linked to Parkinson's disease. This study reviews how LRRK2 influences cellular waste clearance via autophagy, focusing on calcium signaling pathways.

Area of Science:

  • Neuroscience
  • Cell Biology
  • Genetics

Background:

  • Mutations in leucine-rich repeat kinase 2 (LRRK2) are a major genetic factor in Parkinson's disease (PD).
  • LRRK2 kinase activity is linked to cellular toxicity and altered autophagic processes.
  • The exact mechanisms by which LRRK2 impacts autophagy remain unclear.

Purpose of the Study:

  • To review the current understanding of the relationship between LRRK2 and autophagic-lysosomal clearance.
  • To explore the role of LRRK2 in regulating calcium-dependent events within the autophagy pathway.

Main Methods:

  • Literature review of studies investigating LRRK2, autophagy, and calcium signaling.
  • Analysis of data linking LRRK2 mutations to changes in autophagic flux.
  • Examination of the role of NAADP-sensitive lysosomal calcium channels in LRRK2-mediated autophagy.

Main Results:

  • Evidence suggests LRRK2 influences late-stage autophagic clearance.
  • Autophagy regulation by LRRK2 appears dependent on calcium (Ca2+) signaling.
  • Nicotinic acid-adenine dinucleotide phosphate (NAADP)-sensitive lysosomal Ca2+ channels are implicated in this process.

Conclusions:

  • LRRK2 plays a critical role in the autophagic-lysosomal pathway, particularly in calcium-dependent steps.
  • Understanding this LRRK2-autophagy-calcium axis may reveal new therapeutic targets for Parkinson's disease.
  • Further research into NAADP-mediated calcium signaling in LRRK2-associated PD is warranted.

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