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Tumorsphere Derivation and Treatment from Primary Tumor Cells Isolated from Mouse Rhabdomyosarcomas
09:21

Tumorsphere Derivation and Treatment from Primary Tumor Cells Isolated from Mouse Rhabdomyosarcomas

Published on: September 13, 2019

Identification of FoxM1/Bub1b signaling pathway as a required component for growth and survival of rhabdomyosarcoma

Xiaolin Wan1, Choh Yeung, Su Young Kim

  • 1Molecular Oncology Section, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA. xiaolinw@mail.nih.gov

Cancer Research
|September 25, 2012
PubMed

Insights

Bub1b is crucial for rhabdomyosarcoma (RMS) cell growth. Inhibiting Bub1b or its regulator FoxM1 halts tumor progression, offering potential new therapies for RMS.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Biology

Background:

  • Rhabdomyosarcoma (RMS) is a pediatric cancer.
  • Identifying novel therapeutic targets is critical for improving RMS treatment outcomes.

Purpose of the Study:

  • To identify essential genes for rhabdomyosarcoma (RMS) cell growth and survival.
  • To investigate the role of Bub1b and its regulatory pathway in RMS.

Main Methods:

  • Utilized a bar-coded, tetracycline-inducible short hairpin RNA (shRNA) library screen to identify essential genes in RMS.
  • Performed knockdown experiments of Bub1b and Forkhead Box M1 (FoxM1).
  • Employed chromatin immunoprecipitation (ChIP) assays to determine transcriptional regulation.

Main Results:

  • Bub1b was identified as essential for RMS cell proliferation and survival.
  • Knockdown of Bub1b suppressed tumor growth in vivo and led to tumor regression.
  • Bub1b was confirmed as a direct transcriptional target of FoxM1.
  • Suppression of FoxM1 reduced Bub1b expression and inhibited RMS cell growth.

Conclusions:

  • The Bub1b/FoxM1 pathway plays a critical role in rhabdomyosarcoma.
  • Targeting this pathway presents a promising therapeutic strategy for RMS treatment.

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