The EMT-activator ZEB1 is unrelated to platinum drug resistance in ovarian cancer but is predictive of survival

Article


Rae, S., Spillane, C., Blackshields, G., Madden, S., Keenan, J. and Stordal, B. 2022. The EMT-activator ZEB1 is unrelated to platinum drug resistance in ovarian cancer but is predictive of survival. Human Cell. 35 (5), pp. 1547-1559. https://doi.org/10.1007/s13577-022-00744-y
TypeArticle
TitleThe EMT-activator ZEB1 is unrelated to platinum drug resistance in ovarian cancer but is predictive of survival
AuthorsRae, S., Spillane, C., Blackshields, G., Madden, S., Keenan, J. and Stordal, B.
Abstract

The IGROVCDDP cisplatin-resistant ovarian cancer cell line is an unusual model, as it is also cross-resistant to paclitaxel. IGROVCDDP, therefore, models the resistance phenotype of serous ovarian cancer patients who have failed frontline platinum/taxane chemotherapy. IGROVCDDP has also undergone epithelial-mesenchymal transition (EMT). We aim to determine if alterations in EMT-related genes are related to or independent from the drug-resistance phenotypes. EMT gene and protein markers, invasion, motility and morphology were investigated in IGROVCDDP and its parent drug-sensitive cell line IGROV-1. ZEB1 was investigated by qPCR, Western blotting and siRNA knockdown. ZEB1 was also investigated in publicly available ovarian cancer gene-expression datasets. IGROVCDDP cells have decreased protein levels of epithelial marker E-cadherin (6.18-fold, p = 1.58e−04) and higher levels of mesenchymal markers vimentin (2.47-fold, p = 4.43e−03), N-cadherin (4.35-fold, p = 4.76e−03) and ZEB1 (3.43-fold, p = 0.04). IGROVCDDP have a spindle-like morphology consistent with EMT. Knockdown of ZEB1 in IGROVCDDP does not lead to cisplatin sensitivity but shows a reversal of EMT-gene signalling and an increase in cell circularity. High ZEB1 gene expression (HR = 1.31, n = 2051, p = 1.31e−05) is a marker of poor overall survival in high-grade serous ovarian-cancer patients. In contrast, ZEB1 is not predictive of overall survival in high-grade serous ovarian-cancer patients known to be treated with platinum chemotherapy. The increased expression of ZEB1 in IGROVCDDP appears to be independent of the drug-resistance phenotypes. ZEB1 has the potential to be used as biomarker of overall prognosis in ovarian-cancer patients but not of platinum/taxane chemoresistance.

KeywordsEMT; ZEB1; Ovarian cancer; Cisplatin; Paclitaxel
Sustainable Development Goals3 Good health and well-being
Research GroupBiomarkers for Cancer group
PublisherSpringer
JournalHuman Cell
ISSN0914-7470
Electronic1749-0774
Publication dates
Online06 Jul 2022
Print30 Sep 2022
Publication process dates
Deposited07 Jul 2022
Submitted19 Apr 2022
Accepted24 Jun 2022
Output statusPublished
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Copyright Statement

© The Author(s) 2022
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

Digital Object Identifier (DOI)https://doi.org/10.1007/s13577-022-00744-y
PubMed ID35794446
PubMed Central ID9374625
Web of Science identifierWOS:000824822900002
LanguageEnglish
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