Properties of the force exerted by filopodia and lamellipodia and the involvement of cytoskeletal components.
Properties of the force exerted by filopodia and lamellipodia and the involvement of cytoskeletal components.
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DOI:
10.1371/journal.pone.0001072
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发表时间:
2007-10-24
期刊:
影响因子:
3.7
通讯作者:
Torre V
中科院分区:
文献类型:
--
作者:
Cojoc D;Difato F;Ferrari E;Shahapure RB;Laishram J;Righi M;Di Fabrizio EM;Torre V
During neuronal differentiation, lamellipodia and filopodia explore the environment in search for the correct path to the axon's final destination. Although the motion of lamellipodia and filopodia has been characterized to an extent, little is known about the force they exert. In this study, we used optical tweezers to measure the force exerted by filopodia and lamellipodia with a millisecond temporal resolution. We found that a single filopodium exerts a force not exceeding 3 pN, whereas lamellipodia can exert a force up to 20 pN. Using metabolic inhibitors, we showed that no force is produced in the absence of actin polymerization and that development of forces larger than 3 pN requires microtubule polymerization. These results show that actin polymerization is necessary for force production and demonstrate that not only do neurons process information, but they also act on their environment exerting forces varying from tenths pN to tens of pN.
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DOI:
10.1083/jcb.200301147
发表时间:
2003-06-23
期刊:
The Journal of cell biology
影响因子:
--
作者:
Janson ME;de Dood ME;Dogterom M
通讯作者:
Dogterom M
影响因子:
5.3
作者:
Dent, EW;Kalil, K
通讯作者:
Kalil, K
影响因子:
3.4
作者:
Atilgan, E;Wirtz, D;Sun, SX
通讯作者:
Sun, SX
影响因子:
64.8
作者:
Kerssemakers, Jacob W. J.;Munteanu, E. Laura;Dogterom, Marileen
通讯作者:
Dogterom, Marileen
影响因子:
1.6
作者:
Dufresne, ER;Spalding, GC;Grier, DG
通讯作者:
Grier, DG