Review:
Swarm Behavior of Adult-Born Neurons During Migration in a Non-Permissive Environment
Naoko Kaneko*, and Taisei Ishimaru*,**
*Laboratory of Neuronal Regeneration, Graduate School of Brain Science, Doshisha University
1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0394, Japan
Corresponding author
**Faculty of Life and Medical Sciences, Doshisha University
1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0394, Japan
Much attention has been provided to autonomous decentralized systems based on swarm intelligence algorithms in robotics because of their resistance to component failure and ability to adapt to new environments. During development, various types of collectively migrating cells contribute to tissue and organ formation and have provided useful models for studying swarm behaviors. In the adult brain under physiological conditions, collective cell migration is almost exclusively observed in the rostral migratory stream, where adult-born new neurons travel long distances in contiguous chain-like formation. After ischemic stroke, some new neurons migrate toward the lesion site. Studies show that the promotion of migration is critical for efficient neuronal rewiring in the post-stroke brain in rodents. The new neurons traverse to injured tissues that are not conducive to migration by forming small chains, clearing a path through glial cells, and interacting with blood vessels. Although processes involved in migratory behavior, including cytoskeletal dynamics, intercellular adhesion, and chain formation, have been separately investigated, the mechanisms underlying neuronal swarm behavior are unclear. Future studies should help further our understanding of swarm intelligence and advance the development of novel strategies for controlling neuronal migration to promote efficient functional repair and rewiring in various pathological conditions.
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