Clustering lysosomes around the MTOC: a promising strategy for SNCA/alpha-synuclein breakdown leading to parkinson disease treatment

Abstract

Macroautophagy/autophagy maintains cellular homeostasis by degrading cytoplasmic components and its disruption is linked to Parkinson disease (PD), which is characterized by dopamine depletion and the accumulation of SNCA/α-synuclein aggregates in neurons. Therefore, activation of autophagy is considered a therapeutic strategy for PD; however, autophagy inducers have not yet been developed as therapeutic drugs because they are involved in a wide range of signaling pathways. Here, we focused on the lysosomal clustering around the microtubule-organizing center (MTOC) that can regulate the process of autophagosome-lysosome fusion, the final step of autophagy, and examined how lysosomal clustering affects protein degradation through autophagy. Our study identified six compounds from a high-content screen of 1,200 clinically approved drugs that induce both lysosomal clustering and autophagy. Notably, albendazole reduced SNCA aggregates in a PD model by lysosomal clustering and autophagy. These findings suggest that targeting lysosomal clustering could offer new therapeutic insights for PD.

Keywords: Alpha-synuclein; Parkinson disease; autophagy; lysosomal clustering; lysosomal trafficking.

Figure 1.

Overview of the effect of albendazole on the degradation of SNCA aggregates.