Cells migrate through crowded microenvironments within tissues during normal development, immune response, and cancer metastasis. Although migration through pores and tracks in the extracellular matrix (ECM) has been well studied, little is known about cellular traversal into confining cell-dense tissues. We find that embryonic tissue invasion by Drosophila macrophages requires division of an epithelial ectodermal cell at the site of entry. Dividing ectodermal cells disassemble ECM attachment formed by integrin-mediated focal adhesions next to mesodermal cells, allowing macrophages to move their nuclei ahead and invade between two immediately adjacent tissues. Invasion efficiency depends on division frequency, but reduction of adhesion strength allows macrophage entry independently of division. This work demonstrates that tissue dynamics can regulate cellular infiltration.
We thank J. Friml, C. Guet, T. Hurd, M. Fendrych and members of the laboratory for comments on the manuscript; the Bioimaging Facility of IST Austria for excellent support and T. Lecuit, E. Hafen, R. Levayer and A. Martin for fly strains. This work was supported by a grant from the Austrian Science Fund FWF: Lise Meitner Fellowship M2379-B28 to M.A and D.S., and internal funding from IST Austria to D.S. and EMBL to S.D.R.
Akhmanova M, Emtenani S, Krueger D, et al. Cell division in tissues enables macrophage infiltration. Science. 2022;376(6591):394-396. doi:10.1126/science.abj0425
Akhmanova, M., Emtenani, S., Krueger, D., György, A., Pereira Guarda, M., Vlasov, M., … Siekhaus, D. E. (2022). Cell division in tissues enables macrophage infiltration. Science. American Association for the Advancement of Science. https://doi.org/10.1126/science.abj0425
Akhmanova, Maria, Shamsi Emtenani, Daniel Krueger, Attila György, Mariana Pereira Guarda, Mikhail Vlasov, Fedor Vlasov, et al. “Cell Division in Tissues Enables Macrophage Infiltration.” Science. American Association for the Advancement of Science, 2022. https://doi.org/10.1126/science.abj0425.
M. Akhmanova et al., “Cell division in tissues enables macrophage infiltration,” Science, vol. 376, no. 6591. American Association for the Advancement of Science, pp. 394–396, 2022.
Akhmanova M, Emtenani S, Krueger D, György A, Pereira Guarda M, Vlasov M, Vlasov F, Akopian A, Ratheesh A, De Renzis S, Siekhaus DE. 2022. Cell division in tissues enables macrophage infiltration. Science. 376(6591), 394–396.
Akhmanova, Maria, et al. “Cell Division in Tissues Enables Macrophage Infiltration.” Science, vol. 376, no. 6591, American Association for the Advancement of Science, 2022, pp. 394–96, doi:10.1126/science.abj0425.
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