Cited by 226Autophagy in Disease and TherapyParkinson's Disease Mechanisms and TreatmentsProtein Kinase Regulation and GTPase Signaling

Membrane recruitment of endogenous LRRK2 precedes its potent regulation of autophagy

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Schapansky, J., Nardozzi, J. D., Felizia, F., LaVoie, M. J.·2014·Human Molecular Genetics

Abstract

Mutations in leucine-rich repeat kinase 2 (LRRK2) are the most common cause of familial and idiopathic Parkinson's disease. However, the mechanisms for activating its physiological function are not known, hindering identification of the biological role of endogenous LRRK2. The recent discovery that LRRK2 is highly expressed in cells of the innate immune system and genetic association is a risk factor for autoimmune disorders implies an important role for LRRK2 in pathology outside of the central nervous system. Thus, an examination of endogenous LRRK2 in immune cells could provide insight into the protein's function. Here, we establish that stimulation of specific Toll-like receptors results in a complex biochemical activation of endogenous LRRK2, with early phosphorylation of LRRK2 preceding its dimerization and membrane translocation. Membrane-associated LRRK2 co-localized to autophagosome membranes following either TLR4 stimulation or mTOR inhibition with rapamycin. Silencing of endogenous LRRK2 expression resulted in deficits in the induction of autophagy and clearance of a well-described macroautophagy substrate, demonstrating the critical role of endogenous LRRK2 in regulating autophagy. Inhibition of LRRK2 kinase activity also reduced autophagic degradation and suggested the importance of the kinase domain in the regulation of autophagy. Our results demonstrate a well-orchestrated series of biochemical events involved in the activation of LRRK2 important to its physiological function. With similarities observed across multiple cell types and stimuli, these findings are likely relevant in all cell types that natively express endogenous LRRK2, and provide insights into LRRK2 function and its role in human disease.

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Authors
Schapansky, J., Nardozzi, J. D., Felizia, F., & LaVoie, M. J.
Affiliations
Brigham and Women's Hospital (US)
Corresponding author
LaVoie, M. J.
Venue
Human Molecular Genetics
Published
2014-03-27
Volume
23
Issue
16
Pages
4201-4214
ISSN
  • 0964-6906 (ISSN-L)
  • 1460-2083
OpenAlex
W2123609677
Cited by
226
References
80
Citations by year
2026: 8 · 2025: 9 · 2024: 11 · 2023: 22 · 2022: 23 · 2021: 20 · 2020: 22 · 2019: 22 · 2018: 26 · 2017: 23 · 2016: 16 · 2015: 14 · 2014: 9 · 2012: 1
FWCI
15.66
Type
journal article
Language
en
Open access
Locations
  • Human Molecular Genetics (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Michael J. Fox Foundation for Parkinson's Research
  • National Institutes of Health (AG000222)
  • National Institute on Aging (AG000222, T32AG000222)
  • National Institute of Neurological Disorders and Stroke (NS072604, R21NS072604)
Topics
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
Keywords
LRRK2, autophagy, Parkinson's disease, TLR4, membrane translocation, LRRK2 phosphorylation, mTOR inhibition, rapamycin, LRRK2 kinase activity, innate immune cells, autoimmune disease
MeSH terms
Leucine-Rich Repeat Serine-Threonine Protein Kinase-2, Animals, Autophagy, Cell Line, Cell Membrane, Immunosuppressive Agents, Macrophages, Monocytes, Phagocytosis, Phosphorylation, Protein Serine-Threonine Kinases, Microglia, Sirolimus, Protein Transport, Toll-Like Receptor 4, Mice, Protein Multimerization, Gene Knockout Techniques, TOR Serine-Threonine Kinases

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