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Transfer of Manipulated Tumor-associated Neutrophils into Tumor-Bearing Mice to Study their Angiogenic Potential In Vivo
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[The mechanism of NUMB regulate tumor proliferation]

Qian Yu, Xi-Ming Shao, Hua-Shun Li

    Sichuan Da Xue Xue Bao. Yi Xue Ban = Journal of Sichuan University. Medical Science Edition
    |October 25, 2014
    PubMed
    Abstract

    Insights

    NUMB protein depletion significantly accelerates tumor growth by promoting cell cycle progression. This suggests NUMB regulates tumor proliferation through key cell cycle proteins.

    Area of Science:

    • Oncology
    • Cell Biology

    Background:

    • NUMB is a protein involved in cell fate determination and signaling pathways.
    • Its role in regulating tumor proliferation requires further elucidation.

    Purpose of the Study:

    • To investigate the specific mechanism by which NUMB regulates tumor proliferation.
    • To understand NUMB's role in cell cycle control and its impact on cancer growth.

    Main Methods:

    • Established a stable Hela cell line with NUMB knockdown.
    • Utilized Western blot, qRT-PCR, nude mouse tumor growth assays, flow cytometry, and BrdU assays.
    • Analyzed differential expression of cell cycle regulatory proteins.

    Main Results:

    • NUMB knockdown significantly enhanced tumor proliferation in vivo.
    • NUMB depletion promoted G1/S phase transition and increased cell proliferation.
    • Increased Cyclin-E and decreased P27 protein levels were observed in NUMB-depleted cells.

    Conclusions:

    • NUMB plays a critical role in regulating tumor proliferation.
    • NUMB influences cell cycle progression by modulating Cyclin-E and P27 protein levels.

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