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BIOCHEMICAL SOCIETY TRANSACTIONS
Volume -, Issue -, Pages -Publisher
PORTLAND PRESS LTD
DOI: 10.1042/BST20221354
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Cells use actin-based protrusions to migrate, sample their environment, and take up liquids and particles. Lamellipodia and macropinocytic cups are involved in cell migration and uptake of surrounding substances. The regulation between these functions is not well understood.
Cells use actin-based protrusions not only to migrate, but also to sample their environment and take up liquids and particles, including nutrients, antigens and pathogens. Lamellipodia are sheet-like actin-based protrusions involved in sensing the substratum and directing cell migration. Related structures, macropinocytic cups, arise from lamellipodia ruffles and can take in large gulps of the surrounding medium. How cells regulate the balance between using lamellipodia for migration and macropinocytosis is not yet well understood. We recently identified CYRI proteins as RAC1-binding regulators of the dynamics of lamellipodia and macropinocytic events. This review discusses recent advances in our understanding of how cells regulate the balance between eating and walking by repurposing their actin cytoskeletons in response to environmental cues.
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