ArticleMolecular cancer research : MCR2025
Empty Spiracles Homeobox 2 Transcription Factor Functions as a Tumor Suppressor in Renal Cell Carcinoma by Targeting CADM1.
Article in Molecular cancer research : MCR, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
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13 authors.
Funding
Abstract
Renal cell carcinoma (RCC), a prevalent urinary system malignancy, often metastasizes at an early stage. Characterized by a complex pathogenesis and high mortality rate, RCC poses a significant clinical challenge. We evaluated the expression level of empty spiracles homeobox 2 (EMX2) in patients with RCC and revealed a significant reduction of EMX2 expression, correlating with a poor prognosis in patients with RCC. EMX2 functions as a tumor suppressor and inhibits RCC cell proliferation and migration, accompanied by programmed cell death. Implantation of EMX2-transduced RCC cells beneath the mouse kidney capsule or subcutaneous injection of transduced RCC cells results in a reduction in tumor growth and size. Through RNA sequencing and chromatin immunoprecipitation sequencing analyses, we have identified cell adhesion molecule 1 (CADM1) as a direct transcriptional target of EMX2's suppressive effects. CADM1 induction by EMX2 triggers PARP1-mediated parthanatos, a specific type of cell death due to mitochondrial oxidation reduction, in migrating RCC cells. Concurrently, EMX2-CADM1 upregulation instigates caspase-3-dependent apoptosis in attached RCC cells. Furthermore, the EMX2-CADM1 transcriptional axis also inhibits the PI3K-AKT pathway to impair RCC cell growth. Hence, the orchestrated effects mediated by the EMX2-CADM1 axis promote RCC cell death and suppress its growth and invasion, providing potential intervention strategies for combating RCC. IMPLICATIONS: The EMX2-CADM1 transcriptional axis offers a promising therapeutic target for inducing cell death and inhibiting growth and invasion in RCC, which could lead to more effective treatment strategies for this aggressive malignancy.
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