author_facet Yu, Wei-Ming
Feltri, M. Laura
Wrabetz, Lawrence
Strickland, Sidney
Chen, Zu-Lin
Yu, Wei-Ming
Feltri, M. Laura
Wrabetz, Lawrence
Strickland, Sidney
Chen, Zu-Lin
author Yu, Wei-Ming
Feltri, M. Laura
Wrabetz, Lawrence
Strickland, Sidney
Chen, Zu-Lin
spellingShingle Yu, Wei-Ming
Feltri, M. Laura
Wrabetz, Lawrence
Strickland, Sidney
Chen, Zu-Lin
The Journal of Neuroscience
Schwann Cell-Specific Ablation of Laminin γ1 Causes Apoptosis and Prevents Proliferation
General Neuroscience
author_sort yu, wei-ming
spelling Yu, Wei-Ming Feltri, M. Laura Wrabetz, Lawrence Strickland, Sidney Chen, Zu-Lin 0270-6474 1529-2401 Society for Neuroscience General Neuroscience http://dx.doi.org/10.1523/jneurosci.5032-04.2005 <jats:p>To investigate the function of laminin in peripheral nerve development, we specifically disrupted the<jats:italic>laminin</jats:italic>γ<jats:italic>1</jats:italic>gene in Schwann cells. Disruption of<jats:italic>laminin</jats:italic>γ<jats:italic>1</jats:italic>gene expression resulted in depletion of all other laminin chains known to be expressed in Schwann cells. Schwann cells lacking laminin do not extend processes required for initiating axonal sorting and mediating axon-Schwann cell interaction. They fail to downregulate Oct-6 and arrest at the premyelinating stage. The impaired axon-Schwann cell interaction prevents phosphorylation of β-neuregulin-1 receptors and results in decreased cell proliferation. Postnatally, laminin-null Schwann cells exhibit reduced phosphatidylinositol 3 (PI3)-kinase activity and activation of caspase cascades, leading to apoptosis. Injection of a laminin peptide into mutant sciatic nerves partially restores PI3-kinase activity and reduces apoptotic signals. These results demonstrate the following: (1) that laminin initiates axonal sorting and mediates axon-Schwann cell interactions required for Schwann cell proliferation and differentiation, and (2) that laminin provides a PI3-kinase/Akt-mediated Schwann cell survival signal.</jats:p> Schwann Cell-Specific Ablation of Laminin γ1 Causes Apoptosis and Prevents Proliferation The Journal of Neuroscience
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series The Journal of Neuroscience
source_id 49
title Schwann Cell-Specific Ablation of Laminin γ1 Causes Apoptosis and Prevents Proliferation
title_unstemmed Schwann Cell-Specific Ablation of Laminin γ1 Causes Apoptosis and Prevents Proliferation
title_full Schwann Cell-Specific Ablation of Laminin γ1 Causes Apoptosis and Prevents Proliferation
title_fullStr Schwann Cell-Specific Ablation of Laminin γ1 Causes Apoptosis and Prevents Proliferation
title_full_unstemmed Schwann Cell-Specific Ablation of Laminin γ1 Causes Apoptosis and Prevents Proliferation
title_short Schwann Cell-Specific Ablation of Laminin γ1 Causes Apoptosis and Prevents Proliferation
title_sort schwann cell-specific ablation of laminin γ1 causes apoptosis and prevents proliferation
topic General Neuroscience
url http://dx.doi.org/10.1523/jneurosci.5032-04.2005
publishDate 2005
physical 4463-4472
description <jats:p>To investigate the function of laminin in peripheral nerve development, we specifically disrupted the<jats:italic>laminin</jats:italic>γ<jats:italic>1</jats:italic>gene in Schwann cells. Disruption of<jats:italic>laminin</jats:italic>γ<jats:italic>1</jats:italic>gene expression resulted in depletion of all other laminin chains known to be expressed in Schwann cells. Schwann cells lacking laminin do not extend processes required for initiating axonal sorting and mediating axon-Schwann cell interaction. They fail to downregulate Oct-6 and arrest at the premyelinating stage. The impaired axon-Schwann cell interaction prevents phosphorylation of β-neuregulin-1 receptors and results in decreased cell proliferation. Postnatally, laminin-null Schwann cells exhibit reduced phosphatidylinositol 3 (PI3)-kinase activity and activation of caspase cascades, leading to apoptosis. Injection of a laminin peptide into mutant sciatic nerves partially restores PI3-kinase activity and reduces apoptotic signals. These results demonstrate the following: (1) that laminin initiates axonal sorting and mediates axon-Schwann cell interactions required for Schwann cell proliferation and differentiation, and (2) that laminin provides a PI3-kinase/Akt-mediated Schwann cell survival signal.</jats:p>
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author Yu, Wei-Ming, Feltri, M. Laura, Wrabetz, Lawrence, Strickland, Sidney, Chen, Zu-Lin
author_facet Yu, Wei-Ming, Feltri, M. Laura, Wrabetz, Lawrence, Strickland, Sidney, Chen, Zu-Lin, Yu, Wei-Ming, Feltri, M. Laura, Wrabetz, Lawrence, Strickland, Sidney, Chen, Zu-Lin
author_sort yu, wei-ming
container_issue 18
container_start_page 4463
container_title The Journal of Neuroscience
container_volume 25
description <jats:p>To investigate the function of laminin in peripheral nerve development, we specifically disrupted the<jats:italic>laminin</jats:italic>γ<jats:italic>1</jats:italic>gene in Schwann cells. Disruption of<jats:italic>laminin</jats:italic>γ<jats:italic>1</jats:italic>gene expression resulted in depletion of all other laminin chains known to be expressed in Schwann cells. Schwann cells lacking laminin do not extend processes required for initiating axonal sorting and mediating axon-Schwann cell interaction. They fail to downregulate Oct-6 and arrest at the premyelinating stage. The impaired axon-Schwann cell interaction prevents phosphorylation of β-neuregulin-1 receptors and results in decreased cell proliferation. Postnatally, laminin-null Schwann cells exhibit reduced phosphatidylinositol 3 (PI3)-kinase activity and activation of caspase cascades, leading to apoptosis. Injection of a laminin peptide into mutant sciatic nerves partially restores PI3-kinase activity and reduces apoptotic signals. These results demonstrate the following: (1) that laminin initiates axonal sorting and mediates axon-Schwann cell interactions required for Schwann cell proliferation and differentiation, and (2) that laminin provides a PI3-kinase/Akt-mediated Schwann cell survival signal.</jats:p>
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spelling Yu, Wei-Ming Feltri, M. Laura Wrabetz, Lawrence Strickland, Sidney Chen, Zu-Lin 0270-6474 1529-2401 Society for Neuroscience General Neuroscience http://dx.doi.org/10.1523/jneurosci.5032-04.2005 <jats:p>To investigate the function of laminin in peripheral nerve development, we specifically disrupted the<jats:italic>laminin</jats:italic>γ<jats:italic>1</jats:italic>gene in Schwann cells. Disruption of<jats:italic>laminin</jats:italic>γ<jats:italic>1</jats:italic>gene expression resulted in depletion of all other laminin chains known to be expressed in Schwann cells. Schwann cells lacking laminin do not extend processes required for initiating axonal sorting and mediating axon-Schwann cell interaction. They fail to downregulate Oct-6 and arrest at the premyelinating stage. The impaired axon-Schwann cell interaction prevents phosphorylation of β-neuregulin-1 receptors and results in decreased cell proliferation. Postnatally, laminin-null Schwann cells exhibit reduced phosphatidylinositol 3 (PI3)-kinase activity and activation of caspase cascades, leading to apoptosis. Injection of a laminin peptide into mutant sciatic nerves partially restores PI3-kinase activity and reduces apoptotic signals. These results demonstrate the following: (1) that laminin initiates axonal sorting and mediates axon-Schwann cell interactions required for Schwann cell proliferation and differentiation, and (2) that laminin provides a PI3-kinase/Akt-mediated Schwann cell survival signal.</jats:p> Schwann Cell-Specific Ablation of Laminin γ1 Causes Apoptosis and Prevents Proliferation The Journal of Neuroscience
spellingShingle Yu, Wei-Ming, Feltri, M. Laura, Wrabetz, Lawrence, Strickland, Sidney, Chen, Zu-Lin, The Journal of Neuroscience, Schwann Cell-Specific Ablation of Laminin γ1 Causes Apoptosis and Prevents Proliferation, General Neuroscience
title Schwann Cell-Specific Ablation of Laminin γ1 Causes Apoptosis and Prevents Proliferation
title_full Schwann Cell-Specific Ablation of Laminin γ1 Causes Apoptosis and Prevents Proliferation
title_fullStr Schwann Cell-Specific Ablation of Laminin γ1 Causes Apoptosis and Prevents Proliferation
title_full_unstemmed Schwann Cell-Specific Ablation of Laminin γ1 Causes Apoptosis and Prevents Proliferation
title_short Schwann Cell-Specific Ablation of Laminin γ1 Causes Apoptosis and Prevents Proliferation
title_sort schwann cell-specific ablation of laminin γ1 causes apoptosis and prevents proliferation
title_unstemmed Schwann Cell-Specific Ablation of Laminin γ1 Causes Apoptosis and Prevents Proliferation
topic General Neuroscience
url http://dx.doi.org/10.1523/jneurosci.5032-04.2005