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Introduction to the Ultrasound Targeted Microbubble Destruction Technique
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Ultrasound microbubbles mediated miR-let-7b delivery into CD133+ ovarian cancer stem cells

Chaopin Yang1, Bingcheng Li1, Jinsui Yu1

  • 1Department of Ultrasound Medicine, Laboratory of Ultrasound Molecular Imaging, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou 510150, People's Republic of China.

Bioscience Reports
|August 22, 2018
PubMed

Insights

Ultrasound-targeted microbubble destruction effectively delivered miR-let-7b to ovarian cancer stem cells (OCSCs). This method shows promise for treating ovarian cancer by reducing OCSC viability and CD133 expression.

Area of Science:

  • Oncology
  • Biotechnology
  • Molecular Biology

Background:

  • Ovarian cancer stem cells (OCSCs) drive tumor recurrence and metastasis.
  • MicroRNA (miRNA) delivery holds therapeutic potential for cancer stem cells (CSCs).
  • Ultrasound-targeted microbubble destruction (UTMD) is an emerging non-invasive miRNA delivery system.

Purpose of the Study:

  • To investigate the efficacy of UTMD for delivering miR-let-7b into OCSCs.
  • To evaluate the impact of miR-let-7b transfection on OCSC characteristics and viability.

Main Methods:

  • Isolation of CD133+ OCSCs from the A2780 ovarian cancer cell line using flow cytometry.
  • Confirmation of CSC properties through spheroid formation and self-renewal assays.
  • Transfection of miR-let-7b into OCSCs using UTMD and assessment of efficiency via flow cytometry.

Main Results:

  • UTMD demonstrated high miR-let-7b transfection efficiency in OCSCs, comparable to lipofectamine.
  • Transfection significantly decreased OCSC viability and increased late apoptosis rates (2.62% vs. 0.02%).
  • Western blot analysis revealed reduced expression of the stem cell marker CD133 post-transfection.

Conclusions:

  • UTMD-mediated delivery of miR-let-7b is a viable strategy for targeting OCSCs.
  • This approach shows potential for reducing ovarian cancer stem cell populations.
  • UTMD represents a promising platform for developing novel CSC-targeted therapies.
Keywords:
CD133+Ovarian cancer stem cellSonoVueTherapyUltrasoundmiR-let-7b

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