WASP integrates substrate topology and cell polarity to guide neutrophil migration

Rachel M. Brunetti, Gabriele Kockelkoren, Preethi Raghavan, George R.R. Bell, Derek Britain, Natasha Puri, Sean R. Collins, Manuel D. Leonetti, Dimitrios Stamou, Orion D. Weiner

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

To control their movement, cells need to coordinate actin assembly with the geometric features of their substrate. Here, we uncover a role for the actin regulator WASP in the 3D migration of neutrophils. We show that WASP responds to substrate topology by enriching to sites of inward, substrate-induced membrane deformation. Superresolution imaging reveals that WASP preferentially enriches to the necks of these substrate-induced invaginations, a distribution that could support substrate pinching. WASP facilitates recruitment of the Arp2/3 complex to these sites, stimulating local actin assembly that couples substrate features with the cytoskeleton. Surprisingly, WASP only enriches to membrane deformations in the front half of the cell, within a permissive zone set by WASP's front-biased regulator Cdc42. While WASP KO cells exhibit relatively normal migration on flat substrates, they are defective at topology-directed migration. Our data suggest that WASP integrates substrate topology with cell polarity by selectively polymerizing actin around substrate-induced membrane deformations in the front half of the cell.

Original languageEnglish (US)
JournalThe Journal of cell biology
Volume221
Issue number2
DOIs
StatePublished - Feb 7 2022
Externally publishedYes

ASJC Scopus subject areas

  • Cell Biology

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