BORC/kinesin-1 ensemble drives polarized transport of lysosomes into the axon

GG Farías, CM Guardia, R De Pace… - Proceedings of the …, 2017 - National Acad Sciences
Proceedings of the National Academy of Sciences, 2017National Acad Sciences
The ability of lysosomes to move within the cytoplasm is important for many cellular
functions. This ability is particularly critical in neurons, which comprise vast, highly
differentiated domains such as the axon and dendrites. The mechanisms that control
lysosome movement in these domains, however, remain poorly understood. Here we show
that an ensemble of BORC, Arl8, SKIP, and kinesin-1, previously shown to mediate
centrifugal transport of lysosomes in nonneuronal cells, specifically drives lysosome …
The ability of lysosomes to move within the cytoplasm is important for many cellular functions. This ability is particularly critical in neurons, which comprise vast, highly differentiated domains such as the axon and dendrites. The mechanisms that control lysosome movement in these domains, however, remain poorly understood. Here we show that an ensemble of BORC, Arl8, SKIP, and kinesin-1, previously shown to mediate centrifugal transport of lysosomes in nonneuronal cells, specifically drives lysosome transport into the axon, and not the dendrites, in cultured rat hippocampal neurons. This transport is essential for maintenance of axonal growth-cone dynamics and autophagosome turnover. Our findings illustrate how a general mechanism for lysosome dispersal in nonneuronal cells is adapted to drive polarized transport in neurons, and emphasize the importance of this mechanism for critical axonal processes.
National Acad Sciences