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Luminal Stem Cell Determinant SOX9 Controls Lineage Plasticity and Progression in Basal-Like Breast Cancer

ABSTRACT: Luminal Stem Cell Determinant SOX9 Controls Lineage Plasticity and Progression in Basal-Like Breast Cancer

PROVIDER: PRJNA560487 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR10250792.fastq.gz	Fastqsanger.gz
	SRR10250793.fastq.gz	Fastqsanger.gz
	SRR10250794.fastq.gz	Fastqsanger.gz
	SRR10250795.fastq.gz	Fastqsanger.gz

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Luminal Stem Cell Determinant SOX9 Controls Lineage Plasticity and Progression in Basal-Like Breast Cancer (Sox9-KO)

Project description:Lineage plasticity plays an important role in the development of basal-like breast cancer (BLBC), an aggressive cancer subtype. Although studies suggest BLBC is likely to originate from luminal progenitor cells, it acquires substantial basal cell features and contains a heterogenous collection of cells exhibiting basal, luminal and bipotent phenotypes. Why luminal progenitors are prone to BLBC transformation and what drives luminal-to-basal/bipotent reprogramming remains unclear. Here we show that the transcription factor SOX9 acts as a determinant for ER– luminal stem/progenitor cells (LSPCs). SOX9 controls LSPC activity in part by activating both canonical and non-canonical NF-B signaling. Inactivation of p53 and Rb in a BLBC mouse tumor model leads to upregulation of SOX9, which drives luminal-to-bipotent reprogramming in vivo. SOX9 deletion inhibits the progression of benign, neoplastic lesions to invasive carcinoma. Furthermore, SOX9 is overexpressed and correlated with shorter relapse-free survival in human BLBC. These data show that ER– LSPC determinant SOX9 acts as a lineage-specific driver for BLBC transformation.

2020-06-09 | GSE135891 | GEO

Luminal Stem Cell Determinant SOX9 Controls Lineage Plasticity and Progression in Basal-Like Breast Cancer (Sox9-GFP)

Project description:Lineage plasticity plays an important role in the development of basal-like breast cancer (BLBC), an aggressive cancer subtype. Although studies suggest BLBC is likely to originate from luminal progenitor cells, it acquires substantial basal cell features and contains a heterogenous collection of cells exhibiting basal, luminal and bipotent phenotypes. Why luminal progenitors are prone to BLBC transformation and what drives luminal-to-basal/bipotent reprogramming remains unclear. Here we show that the transcription factor SOX9 acts as a determinant for ER– luminal stem/progenitor cells (LSPCs). SOX9 controls LSPC activity in part by activating both canonical and non-canonical NF-KB signaling. Inactivation of p53 and Rb in a BLBC mouse tumor model leads to upregulation of SOX9, which drives luminal-to-bipotent reprogramming in vivo. SOX9 deletion inhibits the progression of benign, neoplastic lesions to invasive carcinoma. Furthermore, SOX9 is overexpressed and correlated with shorter relapse-free survival in human BLBC. These data show that ER– LSPC determinant SOX9 acts as a lineage-specific driver for BLBC transformation.

2020-06-09 | GSE135885 | GEO

Luminal Stem Cell Determinant SOX9 Controls Lineage Plasticity and Progression in Basal-Like Breast Cancer (ATAC-seq)

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Luminal Stem Cell Determinant SOX9 Controls Lineage Plasticity and Progression in Basal-Like Breast Cancer (Sox9-GFP)

Project description:Luminal Stem Cell Determinant SOX9 Controls Lineage Plasticity and Progression in Basal-Like Breast Cancer (Sox9-GFP)

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Luminal Stem Cell Determinant SOX9 Controls Lineage Plasticity and Progression in Basal-Like Breast Cancer (Sox9-KO)

Project description:Luminal Stem Cell Determinant SOX9 Controls Lineage Plasticity and Progression in Basal-Like Breast Cancer (Sox9-KO)

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Luminal Stem Cell Determinant SOX9 Controls Lineage Plasticity and Progression in Basal-Like Breast Cancer (ATAC-seq)

Project description:Luminal Stem Cell Determinant SOX9 Controls Lineage Plasticity and Progression in Basal-Like Breast Cancer (ATAC-seq)

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Lineage plasticity enables low-ER luminal tumors to evolve and gain basal-like traits

Project description:Breast tumors expressing lower levels of Estrogen Receptor (ER) represent a distinct subset of breast cancer characterized by the emergence of basal-like characteristics within tumors that are traditionally considered luminal-like. Lineage tracing of these low-ER tumors in the MMTV-PyMT mouse mammary tumor model revealed that the basal-like tumor cells within these tumors arose from normal luminal epithelial cells, suggesting that luminal-to-basal plasticity is responsible for the evolution and emergence of basal-like characteristics within these tumors. This study aims to identify the potential drivers of this plasticity by using single-cell RNA sequencing to identify populations of lineage-restricted luminal cells and luminal-derived basal cells within the tumor, and comparing their gene expression profiles.

2023-03-01 | GSE214815 | GEO

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Project description:Basal breast cancers, an aggressive breast cancer subtype that has poor treatment options, are thought to arise from luminal mammary epithelial cells that undergo basal-like plasticity through poorly understood mechanisms. Using genetic mouse models and ex vivo primary organoid cultures, we show that conditional co-deletion of the LATS1 and LATS2 kinases, key effectors of Hippo pathway signaling, in mature mammary luminal epithelial cells promotes the development of basal-like carcinomas that metastasize over time. Genetic co-deletion experiments revealed that phenotypes resulting from the loss of LATS1/2 activity are dependent on the transcriptional regulators YAP/TAZ. Notably, transcriptional analyses of LATS1/2-deleted mammary epithelial cells revealed a gene expression program that associates with human basal breast cancers. Our study demonstrates in vivo roles for the LATS1/2 kinases in mammary epithelial homeostasis and luminal-basal fate control and implicates signaling networks induced upon the loss of LATS1/2 activity in the development of basal breast cancers.

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Project description:The retinoblastoma tumor suppressor, Rb, is implicated in luminal-B and basal-like breast carcinomas, yet its effect on mammary gland development and causal role in breast cancer subtypes remain undefined. Here we show that conditional deletion of Rb in mouse mammary epithelium led to expansion of the stem/progenitor cells and to focal acinar hyperplasia with squamous metaplasia. These uniform lesions progressed into histologically diverse, transplantable mammary adenocarcinomas and adenosquamous carcinomas with features of luminal-B or basal-like carcinomas. A subset of basal-like but none of the luminal-B tumors expressed mutant p53. These results demonstrate a causative role for Rb in the etiology of breast cancer subtypes and implicate p53 status as a determinant of tumor phenotype after Rb loss. Keywords: reference x sample Will be updated soon

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ONECUT2 is a druggable driver of luminal to basal breast cancer plasticity [OE_MCF7]

Project description:Tumor heterogeneity complicates patient treatment and can be due to transitioning of cancer cells across phenotypic cell states. This process is associated with the acquisition of independence from an oncogenic driver, such as the estrogen receptor (ER) in breast cancer, resulting in tumor progression, therapeutic failure and metastatic spread. Here we identify the transcription factor ONECUT2 (OC2) as a lineage plasticity regulator of breast cancer (BC) that suppresses the estrogen axis and promotes luminal to basal transition. OC2 is highly expressed in a substantial subset of hormone receptor negative human BC tumors and is associated with poor clinical outcome, lymph node metastasis and heightened clinical stage. We also show that OC2 is required for cell growth and survival in metastatic BC models and that it can be targeted with a small molecule inhibitor providing a novel therapeutic strategy for patients with OC2 active tumors.

2024-05-23 | GSE242540 | GEO

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