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Updated: Aug 5, 2025
Performing Data Mining And Integrative Analysis Of Biomarker in Breast Cancer Using Multiple Publicly Accessible Databases
Published on: May 17, 2019
Prognostic and Predictive Value of LIV1 Expression in Early Breast Cancer and by Molecular Subtype
Alexandre de Nonneville1,2, Pascal Finetti1, Laurys Boudin1
1Equipe labellisée « Ligue Nationale Contre le Cancer », Equipe 'Predictive Oncology', Centre de Recherche en Cancérologie de Marseille, Inserm, CNRS, Institut Paoli-Calmettes, Aix-Marseille University, 13009 Marseille, France.
Background:
LIV1 is a transmembrane protein that may become a new therapeutic target through the development of antibody-drug conjugates (ADCs). Few studies are available regarding the assessment of LIV1 expression in clinical breast cancer (BC) samples.
Methods:
We analyzed LIV1 mRNA expression in 8982 primary BC. We searched for correlations between LIV1 expression and clinicopathological data, including disease-free survival (DFS), overall survival (OS), pathological complete response to chemotherapy (pCR), and potential vulnerability and actionability to anti-cancer drugs used or under development in BC. Analyses were performed in the whole population and each molecular subtype separately.
Results:
LIV1 expression was associated with good-prognosis features and with longer DFS and OS in multivariate analysis. However, patients with high LIV1 expression displayed a lower pCR rate than patients with low expression after anthracycline-based neoadjuvant chemotherapy, including in multivariate analysis adjusted on grade and molecular subtypes. LIV1-high tumors were associated with higher probabilities of sensitivity to hormone therapy and CDK4/6 inhibitors and lower probabilities of sensitivity to immune-checkpoint inhibitors and PARP inhibitors. These observations were different according to the molecular subtypes when analyzed separately.
Conclusions:
These results may provide novel insights into the clinical development and use of LIV1-targeted ADCs by identifying prognostic and predictive value of LIV1 expression in each molecular subtype and associated vulnerability to other systemic therapies.
