Cell Invasion In Vivo via Rapid Exocytosis of a Transient Lysosome-Derived Membrane Domain.

Journal Article (Journal Article)

Invasive cells use small invadopodia to breach basement membrane (BM), a dense matrix that encases tissues. Following the breach, a large protrusion forms to clear a path for tissue entry by poorly understood mechanisms. Using RNAi screening for defects in Caenorhabditis elegans anchor cell (AC) invasion, we found that UNC-6(netrin)/UNC-40(DCC) signaling at the BM breach site directs exocytosis of lysosomes using the exocyst and SNARE SNAP-29 to form a large protrusion that invades vulval tissue. Live-cell imaging revealed that the protrusion is enriched in the matrix metalloprotease ZMP-1 and transiently expands AC volume by more than 20%, displacing surrounding BM and vulval epithelium. Photobleaching and genetic perturbations showed that the BM receptor dystroglycan forms a membrane diffusion barrier at the neck of the protrusion, which enables protrusion growth. Together these studies define a netrin-dependent pathway that builds an invasive protrusion, an isolated lysosome-derived membrane structure specialized to breach tissue barriers.

Full Text

Duke Authors

Cited Authors

  • Naegeli, KM; Hastie, E; Garde, A; Wang, Z; Keeley, DP; Gordon, KL; Pani, AM; Kelley, LC; Morrissey, MA; Chi, Q; Goldstein, B; Sherwood, DR

Published Date

  • November 2017

Published In

Volume / Issue

  • 43 / 4

Start / End Page

  • 403 - 417.e10

PubMed ID

  • 29161591

Pubmed Central ID

  • PMC5726793

Electronic International Standard Serial Number (EISSN)

  • 1878-1551

International Standard Serial Number (ISSN)

  • 1534-5807

Digital Object Identifier (DOI)

  • 10.1016/j.devcel.2017.10.024


  • eng