Title: Nuclear receptor RORγ is a targetable master regulator of cholesterol in a subtype of breast cancer [RNA-Seq]

Accession Number: GSE131856

Link to Dataset: https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE131856

Repository: Gene Expression Omnibus (GEO)

Data Type(s): Gene Expression

Experiment Type(s): Expression profiling by high throughput sequencing

Organism(s): Homo sapiens

Summary: We show that triple-negative breast cancer (TNBC) exhibits a hyper-activated MVA-CB program that is strongly linked to nuclear receptor RORγ, compared to estrogen receptor-positive breast cancer. Genetic and pharmacological inhibition of RORγ reduces tumor cholesterol contents and synthesis rate while preserving host cholesterol homeostasis. We demonstrate, for the first time, that RORγ functions as a master activator of the entire MVA-CB program, dominantly over SREBP2, through its own direct binding and facilitating the recruitment of SREBP2. RORγ inhibition disrupts its association with SREBP2 and reduces MVA-CB chromatin acetylation. RORγ antagonists cause sustained TNBC tumor regression in patient-derived and immune-intact models. Their combination with cholesterol-lowering statins elicits superior anti-tumor synergy selectively in TNBC. Together, our studies uncover a previously unsuspected master regulator of MVA-CB and an attractive target for TNBC.

Publication(s) associated with this dataset:

• Cai D, Wang J, Gao B, Li J, Wu F, Zou JX, Xu J, Jiang Y, Zou H, Huang Z, Borowsky AD, Bold RJ, Lara PN, Li JJ, Chen X, Lam KS, To K, Kung H, Fiehn O, Zhao R, Evans RM, Chen H. 2019. RORgamma is a targetable master regulator of cholesterol biosynthesis in a cancer subtype. Nat Commun 10(1):4621. doi:10.1038/s41467-019-12529-3 PMID:31604910 PMCID:PMC6789042

Project(s) associated with this dataset:

• University of California-San Diego: Nuclear Receptor Mediated Epigenetic and Immune Cell Changes in Liver Fibrosis Resulting From Toxicant Exposure