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Activation of p38 Mitogen-Activated Protein Kinase Promotes Epidermal Growth Factor Receptor Internalization
Endocytic trafficking plays an important role in the regulation of the epidermal growth factor receptor (EGFR). To address if cellular kinases regulate EGFR internalization, we used anisomycin, a potent activator of kinase cascades in mammalian cells, especially the stress-activated mitogen-activate...
Autores principales: | , , |
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Formato: | Texto |
Lenguaje: | English |
Publicado: |
Blackwell Science Inc
2006
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1479226/ https://www.ncbi.nlm.nih.gov/pubmed/16683917 http://dx.doi.org/10.1111/j.1600-0854.2006.00420.x |
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author | Vergarajauregui, Silvia Miguel, Anitza San Puertollano, Rosa |
author_facet | Vergarajauregui, Silvia Miguel, Anitza San Puertollano, Rosa |
author_sort | Vergarajauregui, Silvia |
collection | PubMed |
description | Endocytic trafficking plays an important role in the regulation of the epidermal growth factor receptor (EGFR). To address if cellular kinases regulate EGFR internalization, we used anisomycin, a potent activator of kinase cascades in mammalian cells, especially the stress-activated mitogen-activated protein (MAP) kinase subtypes. Here, we report that activation of p38 MAP kinase by anisomycin is sufficient to induce internalization of EGFR. Anisomycin and EGF employ different mechanisms to promote EGFR endocytosis as anisomycin-induced internalization does not require tyrosine kinase activity or ubiquitination of the receptor. In addition, anisomycin treatment did not result in delivery and degradation of EGFR at lysosomes. Incubation with a specific inhibitor of p38, or depletion of endogenous p38 by small interfering RNAs, abolished anisomycin-induced internalization of EGFR while having no effect on transferrin endocytosis, indicating that the effect of p38 activation on EGFR endocytosis is specific. Interestingly, inhibition of p38 activation also abolished endocytosis of EGFR induced by UV radiation. Our results reveal a novel role for p38 in the regulation of EGFR endocytosis and suggest that stimulation of EGFR internalization by p38 might represent a general mechanism to prevent generation of proliferative or anti-apoptotic signals under stress conditions. |
format | Text |
id | pubmed-1479226 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2006 |
publisher | Blackwell Science Inc |
record_format | MEDLINE/PubMed |
spelling | pubmed-14792262006-06-19 Activation of p38 Mitogen-Activated Protein Kinase Promotes Epidermal Growth Factor Receptor Internalization Vergarajauregui, Silvia Miguel, Anitza San Puertollano, Rosa Traffic Original Articles Endocytic trafficking plays an important role in the regulation of the epidermal growth factor receptor (EGFR). To address if cellular kinases regulate EGFR internalization, we used anisomycin, a potent activator of kinase cascades in mammalian cells, especially the stress-activated mitogen-activated protein (MAP) kinase subtypes. Here, we report that activation of p38 MAP kinase by anisomycin is sufficient to induce internalization of EGFR. Anisomycin and EGF employ different mechanisms to promote EGFR endocytosis as anisomycin-induced internalization does not require tyrosine kinase activity or ubiquitination of the receptor. In addition, anisomycin treatment did not result in delivery and degradation of EGFR at lysosomes. Incubation with a specific inhibitor of p38, or depletion of endogenous p38 by small interfering RNAs, abolished anisomycin-induced internalization of EGFR while having no effect on transferrin endocytosis, indicating that the effect of p38 activation on EGFR endocytosis is specific. Interestingly, inhibition of p38 activation also abolished endocytosis of EGFR induced by UV radiation. Our results reveal a novel role for p38 in the regulation of EGFR endocytosis and suggest that stimulation of EGFR internalization by p38 might represent a general mechanism to prevent generation of proliferative or anti-apoptotic signals under stress conditions. Blackwell Science Inc 2006-06 2006-04-10 /pmc/articles/PMC1479226/ /pubmed/16683917 http://dx.doi.org/10.1111/j.1600-0854.2006.00420.x Text en © 2006 The Authors |
spellingShingle | Original Articles Vergarajauregui, Silvia Miguel, Anitza San Puertollano, Rosa Activation of p38 Mitogen-Activated Protein Kinase Promotes Epidermal Growth Factor Receptor Internalization |
title | Activation of p38 Mitogen-Activated Protein Kinase Promotes Epidermal Growth Factor Receptor Internalization |
title_full | Activation of p38 Mitogen-Activated Protein Kinase Promotes Epidermal Growth Factor Receptor Internalization |
title_fullStr | Activation of p38 Mitogen-Activated Protein Kinase Promotes Epidermal Growth Factor Receptor Internalization |
title_full_unstemmed | Activation of p38 Mitogen-Activated Protein Kinase Promotes Epidermal Growth Factor Receptor Internalization |
title_short | Activation of p38 Mitogen-Activated Protein Kinase Promotes Epidermal Growth Factor Receptor Internalization |
title_sort | activation of p38 mitogen-activated protein kinase promotes epidermal growth factor receptor internalization |
topic | Original Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1479226/ https://www.ncbi.nlm.nih.gov/pubmed/16683917 http://dx.doi.org/10.1111/j.1600-0854.2006.00420.x |
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