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Hsp70—A Universal Biomarker for Predicting Therapeutic Failure in Human Female Cancers and a Target for CTC Isolation in Advanced Cancers
Heat shock protein 70 (Hsp70) is frequently overexpressed in many different tumor types. However, Hsp70 has also been shown to be selectively presented on the plasma membrane of tumor cells, but not normal cells, and this membrane form of Hsp70 (mHsp70) could be considered a universal tumor biomarke...
Autores principales: | , , , , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10452093/ https://www.ncbi.nlm.nih.gov/pubmed/37626772 http://dx.doi.org/10.3390/biomedicines11082276 |
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author | Xanthopoulos, Alexia Samt, Ann-Kathrin Guder, Christiane Taylor, Nicholas Roberts, Erika Herf, Hannah Messner, Verena Trill, Anskar Holzmann, Katharina Larissa Kreszentia Kiechle, Marion Seifert-Klauss, Vanadin Zschaeck, Sebastian Schatka, Imke Tauber, Robert Schmidt, Robert Enste, Katrin Pockley, Alan Graham Lobinger, Dominik Multhoff, Gabriele |
author_facet | Xanthopoulos, Alexia Samt, Ann-Kathrin Guder, Christiane Taylor, Nicholas Roberts, Erika Herf, Hannah Messner, Verena Trill, Anskar Holzmann, Katharina Larissa Kreszentia Kiechle, Marion Seifert-Klauss, Vanadin Zschaeck, Sebastian Schatka, Imke Tauber, Robert Schmidt, Robert Enste, Katrin Pockley, Alan Graham Lobinger, Dominik Multhoff, Gabriele |
author_sort | Xanthopoulos, Alexia |
collection | PubMed |
description | Heat shock protein 70 (Hsp70) is frequently overexpressed in many different tumor types. However, Hsp70 has also been shown to be selectively presented on the plasma membrane of tumor cells, but not normal cells, and this membrane form of Hsp70 (mHsp70) could be considered a universal tumor biomarker. Since viable, mHsp70-positive tumor cells actively release Hsp70 in lipid micro-vesicles, we investigated the utility of Hsp70 in circulation as a universal tumor biomarker and its potential as an early predictive marker of therapeutic failure. We have also evaluated mHsp70 as a target for the isolation and enumeration of circulating tumor cells (CTCs) in patients with different tumor entities. Circulating vesicular Hsp70 levels were measured in the peripheral blood of tumor patients with the compHsp70 ELISA. CTCs were isolated using cmHsp70.1 and EpCAM monoclonal antibody (mAb)-based bead approaches and characterized by immunohistochemistry using cytokeratin and CD45-specific antibodies. In two out of 35 patients exhibiting therapeutic failure two years after initial diagnosis of non-metastatic breast cancer, progressively increasing levels of circulating Hsp70 had already been observed during therapy, whereas levels in patients without subsequent recurrence remained unaltered. With regards to CTC isolation from patients with different tumors, an Hsp70 mAb-based selection system appears superior to an EpCAM mAb-based approach. Extracellular and mHsp70 can therefore serve as a predictive biomarker for therapeutic failure in early-stage tumors and as a target for the isolation of CTCs in various tumor diseases. |
format | Online Article Text |
id | pubmed-10452093 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-104520932023-08-26 Hsp70—A Universal Biomarker for Predicting Therapeutic Failure in Human Female Cancers and a Target for CTC Isolation in Advanced Cancers Xanthopoulos, Alexia Samt, Ann-Kathrin Guder, Christiane Taylor, Nicholas Roberts, Erika Herf, Hannah Messner, Verena Trill, Anskar Holzmann, Katharina Larissa Kreszentia Kiechle, Marion Seifert-Klauss, Vanadin Zschaeck, Sebastian Schatka, Imke Tauber, Robert Schmidt, Robert Enste, Katrin Pockley, Alan Graham Lobinger, Dominik Multhoff, Gabriele Biomedicines Article Heat shock protein 70 (Hsp70) is frequently overexpressed in many different tumor types. However, Hsp70 has also been shown to be selectively presented on the plasma membrane of tumor cells, but not normal cells, and this membrane form of Hsp70 (mHsp70) could be considered a universal tumor biomarker. Since viable, mHsp70-positive tumor cells actively release Hsp70 in lipid micro-vesicles, we investigated the utility of Hsp70 in circulation as a universal tumor biomarker and its potential as an early predictive marker of therapeutic failure. We have also evaluated mHsp70 as a target for the isolation and enumeration of circulating tumor cells (CTCs) in patients with different tumor entities. Circulating vesicular Hsp70 levels were measured in the peripheral blood of tumor patients with the compHsp70 ELISA. CTCs were isolated using cmHsp70.1 and EpCAM monoclonal antibody (mAb)-based bead approaches and characterized by immunohistochemistry using cytokeratin and CD45-specific antibodies. In two out of 35 patients exhibiting therapeutic failure two years after initial diagnosis of non-metastatic breast cancer, progressively increasing levels of circulating Hsp70 had already been observed during therapy, whereas levels in patients without subsequent recurrence remained unaltered. With regards to CTC isolation from patients with different tumors, an Hsp70 mAb-based selection system appears superior to an EpCAM mAb-based approach. Extracellular and mHsp70 can therefore serve as a predictive biomarker for therapeutic failure in early-stage tumors and as a target for the isolation of CTCs in various tumor diseases. MDPI 2023-08-16 /pmc/articles/PMC10452093/ /pubmed/37626772 http://dx.doi.org/10.3390/biomedicines11082276 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Xanthopoulos, Alexia Samt, Ann-Kathrin Guder, Christiane Taylor, Nicholas Roberts, Erika Herf, Hannah Messner, Verena Trill, Anskar Holzmann, Katharina Larissa Kreszentia Kiechle, Marion Seifert-Klauss, Vanadin Zschaeck, Sebastian Schatka, Imke Tauber, Robert Schmidt, Robert Enste, Katrin Pockley, Alan Graham Lobinger, Dominik Multhoff, Gabriele Hsp70—A Universal Biomarker for Predicting Therapeutic Failure in Human Female Cancers and a Target for CTC Isolation in Advanced Cancers |
title | Hsp70—A Universal Biomarker for Predicting Therapeutic Failure in Human Female Cancers and a Target for CTC Isolation in Advanced Cancers |
title_full | Hsp70—A Universal Biomarker for Predicting Therapeutic Failure in Human Female Cancers and a Target for CTC Isolation in Advanced Cancers |
title_fullStr | Hsp70—A Universal Biomarker for Predicting Therapeutic Failure in Human Female Cancers and a Target for CTC Isolation in Advanced Cancers |
title_full_unstemmed | Hsp70—A Universal Biomarker for Predicting Therapeutic Failure in Human Female Cancers and a Target for CTC Isolation in Advanced Cancers |
title_short | Hsp70—A Universal Biomarker for Predicting Therapeutic Failure in Human Female Cancers and a Target for CTC Isolation in Advanced Cancers |
title_sort | hsp70—a universal biomarker for predicting therapeutic failure in human female cancers and a target for ctc isolation in advanced cancers |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10452093/ https://www.ncbi.nlm.nih.gov/pubmed/37626772 http://dx.doi.org/10.3390/biomedicines11082276 |
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