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Updated: Aug 15, 2025

Rab10 Phosphorylation Detection by LRRK2 Activity Using SDS-PAGE with a Phosphate-binding Tag
Published on: December 14, 2017
LRRK2 decreases microglial actin dynamics by filamentous actin depolymerization and Rac1 inhibition
Beomsue Kim1, Young Ho Suh2, Eunhye Joe3,4,5
1Neural Circuit Research Group, Korea Brain Research Institute, Daegu, Republic of Korea.
Abstract:
An active actin dynamic is a crucial feature of brain microglia. Here we report that LRRK2, a primary familial Parkinson's disease-associated gene, negatively regulates microglia's actin dynamics. LRRK2 depolymerized filamentous actin (F-actin) by directly binding to it or inhibiting microglia's Rac-PAK signaling. LRRK2 knockdown resulted in a reduced ruffle and enhanced lamellipodia formation of ADP-activated microglia, altering the microglia's physiological activity to vigorous migration toward damaged cells. These results suggest that LRRK2 is a negative regulator for the controlled actin dynamics in microglia.
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