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Updated: Feb 15, 2026

An Orthotopic Model of Serous Ovarian Cancer in Immunocompetent Mice for in vivo Tumor Imaging and Monitoring of Tumor Immune Responses
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An Orthotopic Model of Serous Ovarian Cancer in Immunocompetent Mice for in vivo Tumor Imaging and Monitoring of Tumor Immune Responses

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RNA-Peptide nanoplexes drug DNA damage pathways in high-grade serous ovarian tumors

Erik C Dreaden1,2,3, Yi Wen Kong1,4, Mohiuddin A Quadir1,2,5

  • 1Koch Institute for Integrative Cancer Research Massachusetts Institute of Technology Cambridge MA 02139.

Bioengineering & Translational Medicine
|January 30, 2018
PubMed

Insights

This study developed a nanoscale therapy to resensitize ovarian cancer to chemotherapy. Combining RNA interference targeting MK2 with chemotherapy significantly improved survival and reduced metastasis in mouse models.

Area of Science:

  • Oncology
  • Nanotechnology
  • Molecular Biology

Background:

  • DNA damaging chemotherapy is standard for advanced ovarian cancer (OC).
  • Most patients initially respond but develop chemo-resistance, necessitating novel adjuvant therapies.
  • Improved treatment strategies are crucial for enhancing survival in advanced OC.

Purpose of the Study:

  • To develop a nanoscale therapy to chemosensitize advanced ovarian tumors to platinum/taxane chemotherapy.
  • To investigate the efficacy of RNA interference targeting MK2 (a protein kinase) in overcoming chemo-resistance.
  • To evaluate the safety and effectiveness of peptide nanoplexes as delivery vectors for siRNA.

Main Methods:

  • Development of a nanoscale peptide-nucleic acid complex for tumor-specific RNA interference (RNAi).
  • Silencing of the protein kinase MK2 using nanoplex-mediated RNAi in mouse models of high-grade serous OC.
  • Assessment of chemosensitization to platinum/taxane therapy and impact on cell cycle checkpoints.

Main Results:

  • Nanoplex-mediated MK2 silencing profoundly sensitized OC models to chemotherapy by blocking p38/MK2-dependent cell cycle checkpoints.
  • Combined RNAi therapy improved overall survival by 37% compared to chemotherapy alone.
  • A significant decrease in lung metastasis was observed without apparent toxic side effects.

Conclusions:

  • Peptide nanoplexes are safe and effective delivery vectors for small interfering RNA (siRNA).
  • Combined inhibition of MK2 can enhance treatment outcomes for advanced ovarian cancer patients undergoing frontline chemotherapy.
  • This approach offers a promising strategy to overcome chemo-resistance in ovarian cancer.
Keywords:
DNA damageRNA interferencechemosensitizationnanomedicineovarian cancerpolymer engineering

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