Dataset Information

Targeting dopamine receptor D2 as a novel therapeutic strategy in endometrial cancer.

ABSTRACT:

Background

ONC201 is a dopamine receptor D2 (DRD2) antagonist that inhibits tumor growth in preclinical models through ClpP activation to induce integrated stress response pathway and mitochondrial events related to inhibition of cell growth, which is being explored in clinical trials for solid tumors and hematological malignancies. In this study, we investigated the anti-tumorigenic effect of ONC201 in endometrial cancer cell lines and a genetically engineered mouse model of endometrial cancer.

Methods

Cell proliferation was assessed by MTT and colony formation assays. Cell cycle and apoptosis were evaluated by Cellometer. Invasion capacity was tested using adhesion, transwell and wound healing assays. LKB1^fl/flp53^fl/fl mouse model of endometrial cancer were fed a control low fat diet versus a high fat diet to mimic diet-induced obesity. Following tumor onset, mice were treated with placebo or ONC201. Metabolomics and lipidomics were used to identify the obesity-dependent effects of ONC201 in the mouse endometrial tumors. DRD2 expression was analyzed by immunohistochemistry in human endometrioid and serous carcinoma specimens. DRD2 mRNA expression from the Cancer Genome Atlas (TCGA) database was compared between the four molecular subtypes of endometrial cancer.

Results

Increasing DRD2 expression in endometrial cancer was significantly associated with grade, serous histology and stage, as well as worse progression free survival and overall survival. Higher expression of DRD2 mRNA was found for the Copy Number High (CNH) subtype when compared to the other subtypes. ONC201 inhibited cell proliferation, induced cell cycle G1 arrest, caused cellular stress and apoptosis and reduced invasion in endometrial cancer cells. Diet-induced obesity promoted endometrial tumor growth while ONC201 exhibited anti-tumorigenic efficacy in the obese and lean LKB1^fl/fl/p53^fl/fl mice. Metabolomic analysis demonstrated that ONC201 reversed the obesity-driven upregulation of lipid biosynthesis and reduced protein biosynthesis in obese and lean mice.

Conclusion

ONC201 has anti-tumorigenic effects in endometrial cancer cells and a transgenic mouse model of endometrial cancer, and DRD2 expression was documented in both human serous and endometrioid endometrial cancer. These studies support DRD2 antagonism via ONC201 as a promising therapeutic strategy for endometrial cancer that has already demonstrated pharmacodynamic activity and clinical benefit in both serous and endometrioid endometrial cancer patients.

SUBMITTER: Pierce SR

PROVIDER: S-EPMC7869513 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature

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Targeting dopamine receptor D2 as a novel therapeutic strategy in endometrial cancer.

Pierce Stuart R SR Fang Ziwei Z Yin Yajie Y West Lindsay L Asher Majdouline M Hao Tianran T Zhang Xin X Tucker Katherine K Staley Allison A Fan Yali Y Sun Wenchuan W Moore Dominic T DT Xu Chang C Tsai Yi-Hsuan YH Parker Joel J Prabhu Varun Vijay VV Allen Joshua E JE Lee Douglas D Zhou Chunxiao C Bae-Jump Victoria V

Journal of experimental & clinical cancer research : CR 20210208 1

<h4>Background</h4>ONC201 is a dopamine receptor D2 (DRD2) antagonist that inhibits tumor growth in preclinical models through ClpP activation to induce integrated stress response pathway and mitochondrial events related to inhibition of cell growth, which is being explored in clinical trials for solid tumors and hematological malignancies. In this study, we investigated the anti-tumorigenic effect of ONC201 in endometrial cancer cell lines and a genetically engineered mouse model of endometrial ...[more]

PMID: 33557912

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Dataset Information

Targeting dopamine receptor D2 as a novel therapeutic strategy in endometrial cancer.

Background

Methods

Results

Conclusion

Publications

Targeting dopamine receptor D2 as a novel therapeutic strategy in endometrial cancer.

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