Blockade of a key region in the extracellular domain inhibits HER2 dimerization and signaling
- Autores
- Menendez, Javier; Schroeder, Barbara; Peirce, Susan K.; Vellón, Luciano; Papadimitropoulou, Adriana; Espinoza, Ingrid; Lupu, Ruth
- Año de publicación
- 2015
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Background: Several treatment strategies target the human epidermal growth factor receptor 2 (HER2) in breast carcinomas, including monoclonal antibodies directed against HER2?s extracellular domain (ECD) and small molecule inhibitors of its tyrosine kinase activity. Yet, novel therapies are needed that prevent HER2 dimerization with other HER family members, because current treatments are only partially effective. Methods: To test the hypothesis that HER2 activation requires a protein sequence in the HER2-ECD that mediates HER2 homo- and heterodimerization, we introduced a series of deletion mutations in the third subdomain of HER2-ECD. These deletion mutants were retrovirally expressed in breast cancer (BC) cells that naturally overexpress HER2 and in noncancerous, HER2-negative breast epithelial cells. One-factor analysis of variance or Student?s t test were used to analyze differences. All statistical tests were two-sided. Results: The smallest deletion in the ECD domain of HER2, which removed only 16 amino acids (HER2-ECDΔ451?466), completely disrupted the oncogenic potential of HER2. In contrast to wild-type HER2, the mutant-inhibited anchorage- independent growth (mean number of colonies: mutant, 70, 95% confidence interval [CI] = 55 to 85; wild-type, 400, 95% CI = 320 to 480, P < .001) increased sensitivity to paclitaxel treatment in both transformed and nontransformed cells. Overexpression of HER2Δ451?466 efficiently inhibited activation of HER1, HER2, and HER3 in all cell lines tested. Conclusions: These findings reveal that an essential ?activating? sequence exists in the extracellular domain of HER2. Disruption of this sequence disables the HER2 dimerization loop, blocks subsequent activation of HER2-driven oncogenic signaling, and generates a dominant-negative form of HER2. Reagents specifically against this molecular activation switch may represent a novel targeted approach for the management of HER2-overexpressing carcinomas.
Fil: Menendez, Javier. Instituto Catalán de Oncología; España
Fil: Schroeder, Barbara. Mayo Clinic Cancer Center; Estados Unidos
Fil: Peirce, Susan K.. Kateric CROC; Estados Unidos
Fil: Vellón, Luciano. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología y Medicina Experimental (i); Argentina
Fil: Papadimitropoulou, Adriana. Laboratory of Molecular Biology and Immunobiotechnology. Hellenic Pasteur Institute; Estados Unidos
Fil: Espinoza, Ingrid. Cancer Institute. University of Mississippi Medical Center; Estados Unidos
Fil: Lupu, Ruth. Mayo Clinic Cancer Center; Estados Unidos - Materia
-
Breast Carcinomas
Her2
Herceptin - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/3060
Ver los metadatos del registro completo
id |
CONICETDig_2ffd069f711bc2af05bac106564d9ab2 |
---|---|
oai_identifier_str |
oai:ri.conicet.gov.ar:11336/3060 |
network_acronym_str |
CONICETDig |
repository_id_str |
3498 |
network_name_str |
CONICET Digital (CONICET) |
spelling |
Blockade of a key region in the extracellular domain inhibits HER2 dimerization and signalingMenendez, JavierSchroeder, BarbaraPeirce, Susan K.Vellón, LucianoPapadimitropoulou, AdrianaEspinoza, IngridLupu, RuthBreast CarcinomasHer2Herceptinhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Background: Several treatment strategies target the human epidermal growth factor receptor 2 (HER2) in breast carcinomas, including monoclonal antibodies directed against HER2?s extracellular domain (ECD) and small molecule inhibitors of its tyrosine kinase activity. Yet, novel therapies are needed that prevent HER2 dimerization with other HER family members, because current treatments are only partially effective. Methods: To test the hypothesis that HER2 activation requires a protein sequence in the HER2-ECD that mediates HER2 homo- and heterodimerization, we introduced a series of deletion mutations in the third subdomain of HER2-ECD. These deletion mutants were retrovirally expressed in breast cancer (BC) cells that naturally overexpress HER2 and in noncancerous, HER2-negative breast epithelial cells. One-factor analysis of variance or Student?s t test were used to analyze differences. All statistical tests were two-sided. Results: The smallest deletion in the ECD domain of HER2, which removed only 16 amino acids (HER2-ECDΔ451?466), completely disrupted the oncogenic potential of HER2. In contrast to wild-type HER2, the mutant-inhibited anchorage- independent growth (mean number of colonies: mutant, 70, 95% confidence interval [CI] = 55 to 85; wild-type, 400, 95% CI = 320 to 480, P < .001) increased sensitivity to paclitaxel treatment in both transformed and nontransformed cells. Overexpression of HER2Δ451?466 efficiently inhibited activation of HER1, HER2, and HER3 in all cell lines tested. Conclusions: These findings reveal that an essential ?activating? sequence exists in the extracellular domain of HER2. Disruption of this sequence disables the HER2 dimerization loop, blocks subsequent activation of HER2-driven oncogenic signaling, and generates a dominant-negative form of HER2. Reagents specifically against this molecular activation switch may represent a novel targeted approach for the management of HER2-overexpressing carcinomas.Fil: Menendez, Javier. Instituto Catalán de Oncología; EspañaFil: Schroeder, Barbara. Mayo Clinic Cancer Center; Estados UnidosFil: Peirce, Susan K.. Kateric CROC; Estados UnidosFil: Vellón, Luciano. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología y Medicina Experimental (i); ArgentinaFil: Papadimitropoulou, Adriana. Laboratory of Molecular Biology and Immunobiotechnology. Hellenic Pasteur Institute; Estados UnidosFil: Espinoza, Ingrid. Cancer Institute. University of Mississippi Medical Center; Estados UnidosFil: Lupu, Ruth. Mayo Clinic Cancer Center; Estados UnidosOxford Univ Press Inc2015-04-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/3060Menendez, Javier; Schroeder, Barbara; Peirce, Susan K.; Vellón, Luciano; Papadimitropoulou, Adriana; et al.; Blockade of a key region in the extracellular domain inhibits HER2 dimerization and signaling; Oxford Univ Press Inc; Journal Of The National Cancer Institute.; 107; 6; 17-4-2015; 1-110027-88741460-2105enginfo:eu-repo/semantics/altIdentifier/url/http://jnci.oxfordjournals.org/content/107/6/djv090.abstractinfo:eu-repo/semantics/altIdentifier/doi/doi:10.1093/jnci/djv090info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:11:47Zoai:ri.conicet.gov.ar:11336/3060instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:11:47.834CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Blockade of a key region in the extracellular domain inhibits HER2 dimerization and signaling |
title |
Blockade of a key region in the extracellular domain inhibits HER2 dimerization and signaling |
spellingShingle |
Blockade of a key region in the extracellular domain inhibits HER2 dimerization and signaling Menendez, Javier Breast Carcinomas Her2 Herceptin |
title_short |
Blockade of a key region in the extracellular domain inhibits HER2 dimerization and signaling |
title_full |
Blockade of a key region in the extracellular domain inhibits HER2 dimerization and signaling |
title_fullStr |
Blockade of a key region in the extracellular domain inhibits HER2 dimerization and signaling |
title_full_unstemmed |
Blockade of a key region in the extracellular domain inhibits HER2 dimerization and signaling |
title_sort |
Blockade of a key region in the extracellular domain inhibits HER2 dimerization and signaling |
dc.creator.none.fl_str_mv |
Menendez, Javier Schroeder, Barbara Peirce, Susan K. Vellón, Luciano Papadimitropoulou, Adriana Espinoza, Ingrid Lupu, Ruth |
author |
Menendez, Javier |
author_facet |
Menendez, Javier Schroeder, Barbara Peirce, Susan K. Vellón, Luciano Papadimitropoulou, Adriana Espinoza, Ingrid Lupu, Ruth |
author_role |
author |
author2 |
Schroeder, Barbara Peirce, Susan K. Vellón, Luciano Papadimitropoulou, Adriana Espinoza, Ingrid Lupu, Ruth |
author2_role |
author author author author author author |
dc.subject.none.fl_str_mv |
Breast Carcinomas Her2 Herceptin |
topic |
Breast Carcinomas Her2 Herceptin |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Background: Several treatment strategies target the human epidermal growth factor receptor 2 (HER2) in breast carcinomas, including monoclonal antibodies directed against HER2?s extracellular domain (ECD) and small molecule inhibitors of its tyrosine kinase activity. Yet, novel therapies are needed that prevent HER2 dimerization with other HER family members, because current treatments are only partially effective. Methods: To test the hypothesis that HER2 activation requires a protein sequence in the HER2-ECD that mediates HER2 homo- and heterodimerization, we introduced a series of deletion mutations in the third subdomain of HER2-ECD. These deletion mutants were retrovirally expressed in breast cancer (BC) cells that naturally overexpress HER2 and in noncancerous, HER2-negative breast epithelial cells. One-factor analysis of variance or Student?s t test were used to analyze differences. All statistical tests were two-sided. Results: The smallest deletion in the ECD domain of HER2, which removed only 16 amino acids (HER2-ECDΔ451?466), completely disrupted the oncogenic potential of HER2. In contrast to wild-type HER2, the mutant-inhibited anchorage- independent growth (mean number of colonies: mutant, 70, 95% confidence interval [CI] = 55 to 85; wild-type, 400, 95% CI = 320 to 480, P < .001) increased sensitivity to paclitaxel treatment in both transformed and nontransformed cells. Overexpression of HER2Δ451?466 efficiently inhibited activation of HER1, HER2, and HER3 in all cell lines tested. Conclusions: These findings reveal that an essential ?activating? sequence exists in the extracellular domain of HER2. Disruption of this sequence disables the HER2 dimerization loop, blocks subsequent activation of HER2-driven oncogenic signaling, and generates a dominant-negative form of HER2. Reagents specifically against this molecular activation switch may represent a novel targeted approach for the management of HER2-overexpressing carcinomas. Fil: Menendez, Javier. Instituto Catalán de Oncología; España Fil: Schroeder, Barbara. Mayo Clinic Cancer Center; Estados Unidos Fil: Peirce, Susan K.. Kateric CROC; Estados Unidos Fil: Vellón, Luciano. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología y Medicina Experimental (i); Argentina Fil: Papadimitropoulou, Adriana. Laboratory of Molecular Biology and Immunobiotechnology. Hellenic Pasteur Institute; Estados Unidos Fil: Espinoza, Ingrid. Cancer Institute. University of Mississippi Medical Center; Estados Unidos Fil: Lupu, Ruth. Mayo Clinic Cancer Center; Estados Unidos |
description |
Background: Several treatment strategies target the human epidermal growth factor receptor 2 (HER2) in breast carcinomas, including monoclonal antibodies directed against HER2?s extracellular domain (ECD) and small molecule inhibitors of its tyrosine kinase activity. Yet, novel therapies are needed that prevent HER2 dimerization with other HER family members, because current treatments are only partially effective. Methods: To test the hypothesis that HER2 activation requires a protein sequence in the HER2-ECD that mediates HER2 homo- and heterodimerization, we introduced a series of deletion mutations in the third subdomain of HER2-ECD. These deletion mutants were retrovirally expressed in breast cancer (BC) cells that naturally overexpress HER2 and in noncancerous, HER2-negative breast epithelial cells. One-factor analysis of variance or Student?s t test were used to analyze differences. All statistical tests were two-sided. Results: The smallest deletion in the ECD domain of HER2, which removed only 16 amino acids (HER2-ECDΔ451?466), completely disrupted the oncogenic potential of HER2. In contrast to wild-type HER2, the mutant-inhibited anchorage- independent growth (mean number of colonies: mutant, 70, 95% confidence interval [CI] = 55 to 85; wild-type, 400, 95% CI = 320 to 480, P < .001) increased sensitivity to paclitaxel treatment in both transformed and nontransformed cells. Overexpression of HER2Δ451?466 efficiently inhibited activation of HER1, HER2, and HER3 in all cell lines tested. Conclusions: These findings reveal that an essential ?activating? sequence exists in the extracellular domain of HER2. Disruption of this sequence disables the HER2 dimerization loop, blocks subsequent activation of HER2-driven oncogenic signaling, and generates a dominant-negative form of HER2. Reagents specifically against this molecular activation switch may represent a novel targeted approach for the management of HER2-overexpressing carcinomas. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-04-17 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/3060 Menendez, Javier; Schroeder, Barbara; Peirce, Susan K.; Vellón, Luciano; Papadimitropoulou, Adriana; et al.; Blockade of a key region in the extracellular domain inhibits HER2 dimerization and signaling; Oxford Univ Press Inc; Journal Of The National Cancer Institute.; 107; 6; 17-4-2015; 1-11 0027-8874 1460-2105 |
url |
http://hdl.handle.net/11336/3060 |
identifier_str_mv |
Menendez, Javier; Schroeder, Barbara; Peirce, Susan K.; Vellón, Luciano; Papadimitropoulou, Adriana; et al.; Blockade of a key region in the extracellular domain inhibits HER2 dimerization and signaling; Oxford Univ Press Inc; Journal Of The National Cancer Institute.; 107; 6; 17-4-2015; 1-11 0027-8874 1460-2105 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/http://jnci.oxfordjournals.org/content/107/6/djv090.abstract info:eu-repo/semantics/altIdentifier/doi/doi:10.1093/jnci/djv090 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Oxford Univ Press Inc |
publisher.none.fl_str_mv |
Oxford Univ Press Inc |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
_version_ |
1844614020195155968 |
score |
13.070432 |