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Published on: June 9, 2023
HSC70 Promotes Breast Cancer Progression via PTEN Autophagic Degradation and PI3K/AKT/mTOR Activation
Zhengqi Wei1,2, Beichen Xie2,3, Xiangrui Meng4,5
1Department of Radiology, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, China.
Heat shock cognate protein 70 (HSC70) is highly expressed in breast cancer, promoting tumor growth and poor prognosis. Targeting HSC70 may offer a new therapeutic strategy for breast cancer treatment.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Heat shock cognate protein 70 (HSC70) is a molecular chaperone involved in protein regulation.
- Its role in breast cancer pathogenesis and the underlying mechanisms remain largely uncharacterized.
Purpose of the Study:
- To investigate the expression, mechanism, and therapeutic potential of HSC70 in breast cancer.
Main Methods:
- TCGA database analysis, patient tissue verification, breast cancer cell and mouse models.
- Immunoprecipitation, protein/RNA stability assays, flow cytometry, biogenic analysis.
- In vivo tumor growth studies.
Main Results:
- HSC70 is upregulated in breast cancer, correlating with poor prognosis.
- HSC70 promotes breast cancer cell cycle progression and proliferation by enhancing PI3K/AKT/mTOR signaling.
- HSC70 reduces PTEN protein stability, leading to its autophagic degradation.
Conclusions:
- HSC70 promotes breast cancer progression via PTEN degradation and PI3K/AKT/mTOR pathway activation.
- HSC70 represents a potential therapeutic target for breast cancer.
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