Efficient delivery of Notch1 siRNA to SKOV3 cells by cationic cholesterol derivative-based liposome

Area of Science:

• Biochemistry
• Nanotechnology
• Oncology

Background:

• Ovarian cancer remains a significant health challenge, necessitating novel therapeutic strategies.
• Notch1 signaling pathway plays a crucial role in ovarian cancer progression.
• Efficient delivery of small interfering RNA (siRNA) is critical for gene silencing therapies.

Purpose of the Study:

• To develop and evaluate a novel cationic cholesterol derivative-based nanoparticle system for siRNA delivery.
• To investigate the inhibition of Notch1 activation in SKOV3 ovarian cancer cells using this system.
• To assess the potential of this approach for ovarian cancer gene therapy.

Main Methods:

• Synthesis of a cationic cholesterol derivative, N-(cholesterylhemisuccinoyl-amino-3-propyl)-N, N-dimethylamine (DMAPA-chems).
• Formation of siRNA/DMAPA-chems nanoparticles with controlled size and surface charge.
• Evaluation of siRNA protection against nuclease degradation.
• Assessment of cellular uptake, Notch1 gene knockdown, and anti-cancer effects in SKOV3 cells.

Main Results:

• siRNA/DMAPA-chems nanoparticles were successfully formed with sizes of 100-200 nm and zeta potentials of 40-50 mV.
• The nanoparticles effectively protected siRNA from degradation in fetal bovine serum.
• High cellular uptake and significant Notch1 gene knockdown were observed in SKOV3 cells at specific ratios and concentrations.
• The treatment inhibited SKOV3 cell growth and promoted apoptosis.

Conclusions:

• Cationic cholesterol derivatives can serve as efficient nonviral carriers for siRNA delivery.
• The developed siRNA/DMAPA-chems nanoparticles show potential for suppressing Notch1 activation in ovarian cancer.
• This strategy offers a promising avenue for the gene therapy of ovarian cancer.