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Inhibition of prostate cancer growth and metastasis using small interference RNA specific for minichromosome complex

Y-K Shi1, Y P Yu, G C Tseng

  • 1Department of Pathology and Biostatistics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA

Cancer Gene Therapy
|June 12, 2010
PubMed

Insights

Minimizing Minichromosome complex maintenance component 7 (MCM7) using siRNA halts prostate cancer cell growth and metastasis. This approach shows promise for treating advanced prostate cancer by targeting MCM7 expression.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Minichromosome complex maintenance component 7 (MCM7) is crucial for DNA replication licensing.
  • MCM7 amplification and overexpression correlate with increased prostate cancer metastasis.
  • The MCM7 gene locus contains a super-oncogene cluster, including MCM7 and microRNAs targeting tumor suppressors.

Purpose of the Study:

  • To investigate the therapeutic potential of targeting MCM7 in prostate cancer.
  • To develop a vector for siRNA-mediated knockdown of MCM7 expression.
  • To evaluate the efficacy of MCM7 inhibition in vitro and in vivo.

Main Methods:

  • Constructed a vector for constitutive small interference RNA (siRNA) expression targeting MCM7.
  • Introduced the vector into PC3 and Du145 prostate cancer cell lines.
  • Administered the vector via tail vein injection with polyethylenimine in xenograft mouse models.

Main Results:

  • MCM7 expression reduced by 80% in treated prostate cancer cell lines.
  • Inhibition of MCM7 led to decreased DNA synthesis and growth arrest in cancer cells.
  • Mice treated with the vector exhibited significantly reduced tumor volume, metastasis, and improved survival rates.

Conclusions:

  • siRNA-mediated intervention of MCM7 expression effectively inhibits prostate cancer cell proliferation and metastasis.
  • Targeting MCM7 holds promise as a therapeutic strategy for androgen-refractory prostate cancer.
  • This approach offers a potential new avenue for treating advanced prostate cancer.

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