Apico-basal elongation requires a drebrin-E–EB3 complex in columnar human epithelial cells
doi: 10.1242/jcs.092676
pmid: 22275434
Apico-basal elongation requires a drebrin-E–EB3 complex in columnar human epithelial cells
Although columnar epithelial cells are known to acquire an elongated shape, the mechanisms involved in this morphological feature have not yet been completely elucidated. Using columnar human intestinal Caco2 cells, it was established here that the levels of drebrin E, an actin-binding protein, increase in the terminal web both in vitro and in vivo during the formation of the apical domain. Drebrin E depletion was found to impair cell compaction and elongation processes in the monolayer without affecting cell polarity or the formation of tight junctions. Decreasing the drebrin E levels disrupted the normal subapical F-actin–myosin-IIB–βII-spectrin network and the apical accumulation of EB3, a microtubule-plus-end-binding protein. Decreasing the EB3 levels resulted in a similar elongation phenotype to that resulting from depletion of drebrin E, without affecting cell compaction processes or the pattern of distribution of F-actin–myosin-IIB. In addition, EB3, myosin IIB and βII spectrin were found to form a drebrin-E-dependent complex. Taken together, these data suggest that this complex connects the F-actin and microtubule networks apically during epithelial cell morphogenesis, while drebrin E also contributes to stabilizing the actin-based terminal web.
- Département Sciences sociales, agriculture et alimentation, espace et environnement France
- National Research Institute for Agriculture, Food and Environment France
- École Nationale Supérieure de Mécanique et des Microtechniques France
- Université Bourgogne Franche-Comté France
- University of Technology of Belfort-Montbéliard France
570, 571, 610, [SDV.BC]Life Sciences [q-bio]/Cellular Biology, MESH: Actins, MESH: Neuropeptides, MESH: Tight Junctions, Tight Junctions, MESH: Cell Shape, Humans, MESH: Nonmuscle Myosin Type IIB, [SDV.BC] Life Sciences [q-bio]/Cellular Biology, Cell Shape, MESH: Humans, Nonmuscle Myosin Type IIB, Neuropeptides, Cell Polarity, Spectrin, MESH: Spectrin, Epithelial Cells, Actins, MESH: Microtubule-Associated Proteins, MESH: Epithelial Cells, MESH: Caco-2 Cells, MESH: Cell Polarity, Caco-2 Cells, Microtubule-Associated Proteins
570, 571, 610, [SDV.BC]Life Sciences [q-bio]/Cellular Biology, MESH: Actins, MESH: Neuropeptides, MESH: Tight Junctions, Tight Junctions, MESH: Cell Shape, Humans, MESH: Nonmuscle Myosin Type IIB, [SDV.BC] Life Sciences [q-bio]/Cellular Biology, Cell Shape, MESH: Humans, Nonmuscle Myosin Type IIB, Neuropeptides, Cell Polarity, Spectrin, MESH: Spectrin, Epithelial Cells, Actins, MESH: Microtubule-Associated Proteins, MESH: Epithelial Cells, MESH: Caco-2 Cells, MESH: Cell Polarity, Caco-2 Cells, Microtubule-Associated Proteins
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