Conditional disruption of beta 1 integrin in Schwann cells impedes interactions with axons.

Conditional disruption of beta 1 integrin in Schwann cells impedes interactions with axons.
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DOI:
10.1083/jcb.200109021
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发表时间:
2002-01-07
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Wrabetz L
Wrabetz L
中科院分区:
其他
文献类型:
--
作者:
Feltri ML;Graus Porta D;Previtali SC;Nodari A;Migliavacca B;Cassetti A;Littlewood-Evans A;Reichardt LF;Messing A;Quattrini A;Mueller U;Wrabetz L

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In dystrophic mice, a model of merosin-deficient congenital muscular dystrophy, laminin-2 mutations produce peripheral nerve dysmyelination and render Schwann cells unable to sort bundles of axons. The laminin receptor and the mechanism through which dysmyelination and impaired sorting occur are unknown. We describe mice in which Schwann cell–specific disruption of β1 integrin, a component of laminin receptors, causes a severe neuropathy with impaired radial sorting of axons. β1-null Schwann cells populate nerves, proliferate, and survive normally, but do not extend or maintain normal processes around axons. Interestingly, some Schwann cells surpass this problem to form normal myelin, possibly due to the presence of other laminin receptors such as dystroglycan and α6β4 integrin. These data suggest that β1 integrin links laminin in the basal lamina to the cytoskeleton in order for Schwann cells to ensheath axons, and alteration of this linkage contributes to the peripheral neuropathy of congenital muscular dystrophy.
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