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Bone morphogenetic protein-7 inhibits telomerase activity, telomere maintenance, and cervical tumor growth

Lucy Cassar1, He Li, Alexander Ruvantha Pinto

  • 1Department of Immunology, Central Eastern Clinical School, Monash University, Melbourne, Australia.

Cancer Research
|November 18, 2008
PubMed

Insights

Bone morphogenetic protein-7 (BMP7) inhibits telomerase activity, crucial for cancer cell survival. This discovery offers a new therapeutic strategy for cervical cancer by halting tumor growth through telomere maintenance inhibition.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Telomere maintenance is essential for cancer cell immortalization and tumor growth.
  • Telomerase activity, particularly the human telomerase reverse transcriptase (hTERT) gene, plays a critical role in this process.
  • Cervical cancer cells rely on telomere maintenance for sustained proliferation.

Purpose of the Study:

  • To investigate the effect of bone morphogenetic protein-7 (BMP7) on telomere maintenance in cervical cancer cells.
  • To elucidate the mechanism by which BMP7 influences telomerase activity and its impact on tumor growth.
  • To explore BMP7 as a potential therapeutic agent for cervical cancer.

Main Methods:

  • Application of human recombinant BMP7 to cervical cancer cells and mouse xenograft models.
  • Measurement of telomerase activity and hTERT gene expression.
  • Assessment of telomere length and cell death.
  • Gene silencing of hTERT and overexpression studies.

Main Results:

  • BMP7 application led to the repression of the hTERT gene and significant inhibition of telomerase activity.
  • BMP7 treatment resulted in telomere shortening and induced cervical cancer cell death.
  • In vivo studies showed that BMP7 treatment or hTERT silencing caused tumor growth arrest.
  • Overexpression of hTERT counteracted BMP7's effects, preventing tumor growth arrest.

Conclusions:

  • BMP7 negatively regulates telomere maintenance by repressing the hTERT gene in cervical cancer.
  • BMP7 induces cervical tumor growth arrest through the inhibition of telomerase activity and subsequent telomere shortening.
  • BMP7 represents a promising therapeutic target for controlling cervical cancer progression.

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