TY - JOUR
T1 - Methodological Advancements for Investigating Intra-tumoral Heterogeneity in Breast Cancer at the Bench and Bedside
AU - Baek, Mokryun
AU - Chang, Jeffrey T.
AU - Echeverria, Gloria V.
N1 - Funding Information:
G.V.E. is a Cancer Prevention Research Institute of Texas (CPRIT) Scholar in Cancer Research. The authors are supported by a CPRIT faculty recruitment award RR200009 to G.V.E., National Institutes of Health (NIH) 1K22CA241113-01 to G.V.E., CPRIT RP170668 and RP160710 to J.T.C., and NIH U54CA209978 to J.T.C. the content is solely the responsibility of the authors and does not necesarily represent the offical vies of the NIH or CPRIT
Publisher Copyright:
© 2020, The Author(s).
PY - 2020/12
Y1 - 2020/12
N2 - There is a major need to overcome therapeutic resistance and metastasis that eventually arises in many breast cancer patients. Therapy resistant and metastatic tumors are increasingly recognized to possess intra-tumoral heterogeneity (ITH), a diversity of cells within an individual tumor. First hypothesized in the 1970s, the possibility that this complex ITH may endow tumors with adaptability and evolvability to metastasize and evade therapies is now supported by multiple lines of evidence. Our understanding of ITH has been driven by recent methodological advances including next-generation sequencing, computational modeling, lineage tracing, single-cell technologies, and multiplexed in situ approaches. These have been applied across a range of specimens, including patient tumor biopsies, liquid biopsies, cultured cell lines, and mouse models. In this review, we discuss these approaches and how they have deepened our understanding of the mechanistic origins of ITH amongst tumor cells, including stem cell-like differentiation hierarchies and Darwinian evolution, and the functional role for ITH in breast cancer progression. While ITH presents a challenge for combating tumor evolution, in-depth analyses of ITH in clinical biopsies and laboratory models hold promise to elucidate therapeutic strategies that should ultimately improve outcomes for breast cancer patients.
AB - There is a major need to overcome therapeutic resistance and metastasis that eventually arises in many breast cancer patients. Therapy resistant and metastatic tumors are increasingly recognized to possess intra-tumoral heterogeneity (ITH), a diversity of cells within an individual tumor. First hypothesized in the 1970s, the possibility that this complex ITH may endow tumors with adaptability and evolvability to metastasize and evade therapies is now supported by multiple lines of evidence. Our understanding of ITH has been driven by recent methodological advances including next-generation sequencing, computational modeling, lineage tracing, single-cell technologies, and multiplexed in situ approaches. These have been applied across a range of specimens, including patient tumor biopsies, liquid biopsies, cultured cell lines, and mouse models. In this review, we discuss these approaches and how they have deepened our understanding of the mechanistic origins of ITH amongst tumor cells, including stem cell-like differentiation hierarchies and Darwinian evolution, and the functional role for ITH in breast cancer progression. While ITH presents a challenge for combating tumor evolution, in-depth analyses of ITH in clinical biopsies and laboratory models hold promise to elucidate therapeutic strategies that should ultimately improve outcomes for breast cancer patients.
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U2 - 10.1007/s10911-020-09470-3
DO - 10.1007/s10911-020-09470-3
M3 - Article
C2 - 33300087
AN - SCOPUS:85097316742
SN - 1083-3021
VL - 25
SP - 289
EP - 304
JO - Journal of Mammary Gland Biology and Neoplasia
JF - Journal of Mammary Gland Biology and Neoplasia
IS - 4
ER -