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Characterization of a novel breast cancer cell line derived from a metastatic bone lesion of a breast cancer patient [Genotype]

ABSTRACT: As organ-specific models of breast cancer bone metastasis do not exist, we established a novel breast cancer line was established from the ER-/PR-/HER2- bone metastasis from a breast cancer patient. This cell line was characterized and compared to the primary tumour and/or normal mammary epithelial cells with regards to phenotypes (i.e. marker expression), gene expression and copy number variation.

ORGANISM(S): Homo sapiens

PROVIDER: GSE103896 | GEO | 2018/01/01

SECONDARY ACCESSION(S): PRJNA407430

REPOSITORIES: GEO

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Gene expression patterns of a novel breast cancer cell line derived from a bone metastatic lesion of a breast cancer patient

Project description:As organ-specific models of breast cancer bone metastasis do not exist, we established a novel breast cancer line was established from the ER-/PR-/HER2- bone metastasis from a breast cancer patient. This cell line was characterized and compared to the primary tumour and/or normal mammary epithelial cells with regards to phenotypes (i.e. marker expression), gene expression and copy number variation.

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Characterization of a novel breast cancer cell line derived from a metastatic bone lesion of a breast cancer patient [gene expression]

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A novel breast cancer cell line derived from a metastatic bone lesion of a breast cancer patient

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ABCC5 supports osteoclast formation and promotes breast cancer metastasis to bone

Project description:Bone is the primary site of breast cancer metastasis and complications associated with bone metastases can lead to a significantly decreased quality of life in these patients. Thus, it is essential to gain a better understanding of the molecular mechanisms that underlie the emergence and growth of breast cancer skeletal metastases. Methods: To search for novel molecular mediators that influence breast cancer bone metastasis, we generated gene expression profiles from laser capture micro-dissected trephine biopsies of both breast cancer bone metastases and primary breast tumors that metastasized to bone. Bioinformatics analysis identified genes that are differentially expressed in breast cancer bone metastases compared to primary mammary tumors. Results: ABCC5, an ATP-dependent transporter, was found to be overexpressed in breast cancer osseous metastases relative to primary mammary tumors. In addition, ABCC5 was significantly up-regulated in human and mouse breast cancer cell lines with high bone-metastatic potential. Stable knockdown of ABCC5 significant reduced bone metastatic burden and osteolytic bone destruction in mice. The decrease in osteolysis was further associated with diminished osteoclast numbers. Conclusions: Our data, for the first time, suggests that ABCC5 functions as a mediator of breast cancer skeletal metastasis. ABCC5 expression in breast cancer cells is important for the efficient bone resorption mediated by osteoclasts. Hence, ABCC5 may be a potential therapeutic target for breast cancer bone metastasis. primary breast tumors vs. bone trephine biopsies

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