Abstract:
:Connection of tubules into larger networks is the key process for the development of circulatory systems. In Drosophila development, tip cells of the tracheal system lead the migration of each branch and connect tubules by adhering to each other and simultaneously changing into a torus-shape. We show that as adhesion sites form between fusion cells, myosin and microtubules form polarized bundles that connect the new adhesion site to the cells' microtubule-organizing centres, and that E-cadherin and retrograde recycling endosomes are preferentially deposited at the new adhesion site. We demonstrate that microtubules help balancing tip cell contraction, which is driven by myosin, and is required for adhesion and tube fusion. We also show that retrograde recycling and directed secretion of a specific matrix protein into the fusion-cell interface promote fusion. We propose that microtubule bundles connecting these cell-cell interfaces coordinate cell contractility and apical secretion to facilitate tube fusion.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Kato K,Dong B,Wada H,Tanaka-Matakatsu M,Yagi Y,Hayashi Sdoi
10.1038/ncomms11141subject
Has Abstractpub_date
2016-04-12 00:00:00pages
11141issn
2041-1723pii
ncomms11141journal_volume
7pub_type
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