4.7 Article

How Lineage Tracing Studies Can Unveil Tumor Heterogeneity in Breast Cancer

Journal

BIOMEDICINES
Volume 10, Issue 1, Pages -

Publisher

MDPI
DOI: 10.3390/biomedicines10010003

Keywords

breast cancer; lineage tracing; heterogeneity; cellular plasticity

Funding

  1. Spanish Ministry of Science abd Innovation (MCI) [PID2020-117212RB-I00/AEI/10.13039/501100011033, RYC2018-024099-I]
  2. CERCA Program of the Generalitat de Catalunya
  3. Departament de Salut [SLT017/20/000140]

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This article reviews the application of lineage tracing analysis in breast cancer research, discussing the importance of cellular heterogeneity and the strategies to identify the cell of origin in breast cancer subtypes. It also examines the role of cellular plasticity in tumorigenesis.
Lineage tracing studies have become a well-suited approach to reveal cellular hierarchies and tumor heterogeneity. Cellular heterogeneity, particularly in breast cancer, is still one of the main concerns regarding tumor progression and resistance to anti-cancer therapies. Here, we review the current knowledge about lineage tracing analyses that have contributed to an improved comprehension of the complexity of mammary tumors, highlighting how targeting different mammary epithelial cells and tracing their progeny can be useful to explore the intra- and inter-heterogeneity observed in breast cancer. In addition, we examine the strategies used to identify the cell of origin in different breast cancer subtypes and summarize how cellular plasticity plays an important role during tumorigenesis. Finally, we evaluate the clinical implications of lineage tracing studies and the challenges remaining to address tumor heterogeneity in breast cancer.

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