Abstract：
:The functions of caveolae, the characteristic plasma membrane invaginations, remain debated. Their abundance in cells experiencing mechanical stress led us to investigate their role in membrane-mediated mechanical response. Acute mechanical stress induced by osmotic swelling or by uniaxial stretching results in a rapid disappearance of caveolae, in a reduced caveolin/Cavin1 interaction, and in an increase of free caveolins at the plasma membrane. Tether-pulling force measurements in cells and in plasma membrane spheres demonstrate that caveola flattening and disassembly is the primary actin- and ATP-independent cell response that buffers membrane tension surges during mechanical stress. Conversely, stress release leads to complete caveola reassembly in an actin- and ATP-dependent process. The absence of a functional caveola reservoir in myotubes from muscular dystrophic patients enhanced membrane fragility under mechanical stress. Our findings support a new role for caveolae as a physiological membrane reservoir that quickly accommodates sudden and acute mechanical stresses.
journal_name
Celljournal_title
Cellauthors
Sinha B,Köster D,Ruez R,Gonnord P,Bastiani M,Abankwa D,Stan RV,Butler-Browne G,Vedie B,Johannes L,Morone N,Parton RG,Raposo G,Sens P,Lamaze C,Nassoy Pdoi
10.1016/j.cell.2010.12.031subject
Has Abstractpub_date
2011-02-04 00:00:00pages
402-13issue
3eissn
0092-8674issn
1097-4172pii
S0092-8674(10)01523-0journal_volume
144pub_type
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