Related Experiment Video

Updated: Sep 15, 2025

Rab10 Phosphorylation Detection by LRRK2 Activity Using SDS-PAGE with a Phosphate-binding Tag
08:55

Rab10 Phosphorylation Detection by LRRK2 Activity Using SDS-PAGE with a Phosphate-binding Tag

Published on: December 14, 2017

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LRRK2 kinase modulates glucose-stimulated insulin secretion via RAB8 phosphorylation and ciliogenesis

Nevia Dule1, Algerta Marku1, Alessandra Galli1

  • 1Laboratory of Molecular and Cellular Physiology, Department of Excellence of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Via Trentacoste 2, 20134, Milan, Italy.

Cellular and Molecular Life Sciences : CMLS
|July 17, 2025
PubMed

Insights

Leucine-rich repeat kinase 2 (LRRK2) influences insulin secretion in pancreatic cells. Mutations linked to Parkinson's disease affect this process, suggesting peripheral roles in neurodegeneration.

Area of Science:

  • Endocrinology
  • Neuroscience
  • Cell Biology

Background:

  • Leucine-rich repeat kinase 2 (LRRK2) mutations are genetic risk factors for Parkinson's disease (PD).
  • LRRK2 is expressed in the endocrine pancreas, but its function there is unknown.
  • Parkinson's disease is an age-related neurodegenerative disorder.

Purpose of the Study:

  • To investigate the role of LRRK2 in pancreatic β-cell function.
  • To determine if LRRK2 kinase activity regulates insulin secretion.
  • To explore the mechanism by which LRRK2 influences hormone secretion.

Main Methods:

  • Pharmacological inhibition and activation of LRRK2.
  • Molecular approaches to study LRRK2 function.
  • In vitro models of pancreatic β-cells.
  • Transgenic mouse models with PD-associated LRRK2 mutations.

Main Results:

  • LRRK2 kinase activity regulates stimulated insulin secretion by affecting secretory granule trafficking.
  • The PD-associated G2019S LRRK2 mutant enhances basal insulin release.
  • LRRK2 kinase activity influences primary cilium formation and RAB8 recruitment in a glucose-dependent manner.

Conclusions:

  • LRRK2 is identified as a regulator of insulin secretion in pancreatic β-cells.
  • LRRK2's role in peripheral insulin secretion may contribute to Parkinson's disease development.
  • Dysregulation of LRRK2 in pancreatic cells could link metabolic dysfunction to neurodegeneration.
Keywords:
InsulinLRRK2; β-cell; RABsParkinson diseasePrimary cilium

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