ArticleBreast cancer research : BCR2025
Microtubule associated serine/threonine kinase-3 inhibits the malignant phenotype of breast cancer by promoting phosphorylation-mediated ubiquitination degradation of yes-associated protein.
Article in Breast cancer research : BCR, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed.
- Electroacupuncture enhances anti-tumor immunity in TNBC by reducing NE release and blocking α2-AR-mediated NGF/Hippo signaling.Chinese medicine · 2026Article
- PRMT1 facilitates the tumorigenesis of chronic lymphocytic leukemia by regulating methylation of MAST1.Leukemia · 2026Article
- Molecular insights into ANPEP in gastric adenocarcinoma.Genetics and molecular biology · 2026Article
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Abstract
backgroundMicrotubule associated series/threonine kinase-3 (MAST3) is a member of microtubule associated serine/threonine kinase family (MAST1-4, MAST-like), and the expression and underlying molecular mechanism of MAST3 in human tumors, including breast cancer, is not yet elucidated.
methodsWe employed immunohistochemistry to assess the significant expression of MAST3 in breast cancer tissue samples. Additionally, we utilized an overexpression vector and shRNA to bi-directionally regulate MAST3 expression, aiming to observe the impact of MAST3 on the proliferation, migration, and invasion capabilities of breast cancer cells. Furthermore, we employed immunoprecipitation, immunoblotting, luciferase reporter genes and real-time quantitative PCR to investigate the interaction between MAST3 and YAP, as well as the regulatory effects on the expression of Hippo pathway-related target genes.
resultsLow MAST3 expression was observed both in breast cancer cells and tissues, which was significantly associated with advanced tumor T stage, lymph node metastasis, and poor patient prognosis. Functional experiments found that overexpression of MAST3 can gradually inhibit the proliferation and invasion of breast cancer cells, knocking-out MAST3 showed the opposite functional effect. Immunoprecipitation showed that MAST3 interacts with the key effector factor, yes-associated protein (YAP), in the Hippo pathway. The combination of MAST3-YAP promoted the phosphorylation of YAP, which led to its degradation through the ubiquitin-proteasome pathway and reduced nuclear translocation.
conclusionsMAST3 was identified as a novel tumor suppressor protein in breast cancer, which directly regulates the expression of YAP through the non-dependent mammalian sterile-20-like (MST)-large tumor suppressor (LATS) classical signaling pathway, providing a theoretical and experimental basis for the development of small-molecule tumor inhibitors in breast cancer.
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