Abstract
Most ovarian cancer patients respond well to initial platinum-based chemotherapy. However, within a year, many patients experience disease recurrence with a platinum resistant phenotype that responds poorly to second line chemotherapies. As a result, new strategies to address platinum resistant ovarian cancer (PROC) are needed. Herein, we report that NP co-delivery of cisplatin (CP) and wortmannin (Wtmn), a DNA repair inhibitor, synergistically enhances chemoradiotherapy (CRT) and reverses CP resistance in PROC. We encapsulated this regimen in FDA approved poly(lactic-co-glycolic acid)-poly(ethylene glycol) (PLGA-PEG) NPs to reduce systemic side effects, enhance cellular CP uptake, improve Wtmn stability, and increase therapeutic efficacy. Treatment of platinum-sensitive ovarian cancer (PSOC) and PROC murine models with these dual-drug loaded NPs (DNPs) significantly reduced tumor burden versus treatment with combinations of free drugs or single-drug loaded NPs (SNPs). These results support further investigation of this NP-based, synergistic drug regimen as a means to combat PROC in the clinic.
Original language | English (US) |
---|---|
Pages (from-to) | 1-10 |
Number of pages | 10 |
Journal | Biomaterials |
Volume | 169 |
DOIs | |
State | Published - Jul 2018 |
Externally published | Yes |
Keywords
- Combination therapy
- Nanoparticle
- Ovarian cancer
- Platinum resistance
- Treatment synergy
ASJC Scopus subject areas
- Mechanics of Materials
- Ceramics and Composites
- Bioengineering
- Biophysics
- Biomaterials