Structure and biomechanics of the endothelial transcellular circumferential invasion array in tumor invasion.

Structure and biomechanics of the endothelial transcellular circumferential invasion array in tumor invasion.
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DOI:
10.1371/journal.pone.0089758
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Chew TL
Chew TL
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Arvanitis C;Khuon S;Spann R;Ridge KM;Chew TL

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Cancer cells breach the endothelium not only through cell-cell junctions but also via individual endothelial cells (ECs), or transcellular invasion. The underlying EC forms a circular structure around the transcellular invasion pore that is dependent on myosin light chain kinase (MLCK) and myosin II regulatory light chain (RLC) phosphorylation. Here we offer mechanistic insights into transcellular invasive array formation amid persistent tensile force from activated EC myosin. Fluorescence recovery after photobleaching (FRAP) experiments, sarcomeric distance measurements using super-resolution microscopy and electron microscopy provide details about the nature of the myosin II invasion array. To probe the relationship between biomechanical forces and the tension required to maintain the curvature of contractile filaments, we targeted individual actin-myosin fibers at the invasion site for photoablation. We showed that adjacent filaments rapidly replace the ablat11ed structures. We propose that the transcellular circumferential invasion array (TCIA) provides the necessary constraint within the EC to blunt the radial compression from the invading cancer cell.
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