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Cyclodextrin-based nanosponges: effective nanocarrier for tamoxifen delivery
Satyen Torne1, Sharad Darandale, Pradeep Vavia
1Pharmaceutical Sciences and Technology, University Institute of Chemical Technology, Mumbai, India.
Pharmaceutical Development and Technology
|January 13, 2012
Summary
This study developed Tamoxifen loaded β-cyclodextrin nanosponges for enhanced oral drug delivery. The novel nanosponges significantly improved Tamoxifen bioavailability and cytotoxicity in cancer cells.
Area of Science:
- Pharmaceutical Sciences
- Nanotechnology
- Drug Delivery
Background:
- Tamoxifen is a widely used drug for hormone-responsive breast cancer.
- Challenges exist in Tamoxifen's oral bioavailability and targeted delivery.
- β-cyclodextrin nanosponges offer a promising platform for drug encapsulation and controlled release.
Purpose of the Study:
- To develop and characterize Tamoxifen loaded β-cyclodextrin nanosponges for improved oral drug delivery.
- To evaluate the complexation efficiency and physicochemical properties of the nanosponges.
- To assess the in vivo pharmacokinetic profile and in vitro cytotoxicity of the Tamoxifen nanosponge complex.
Main Methods:
- Synthesis of Tamoxifen loaded β-cyclodextrin nanosponges using varying molar ratios of β-cyclodextrin to carbonyldiimidazole (1:2, 1:4, 1:8).
- Characterization of nanosponges using freeze-drying, Differential Scanning Calorimetry (DSC), Fourier Transform Infrared Spectroscopy (FTIR), and X-ray Powder Diffraction (XRPD).
- In vivo pharmacokinetic studies via gastric intubation and in vitro cytotoxicity assays on MCF-7 cells.
Main Results:
- Tamoxifen nanosponge complexes (TNC) with particle sizes of 400-600 nm were successfully prepared.
- DSC, FTIR, and XRPD confirmed the successful complexation of Tamoxifen within the β-cyclodextrin nanosponges.
- TNC formulation exhibited significantly higher AUC (1.44-fold) and Cmax (1.38-fold) compared to plain Tamoxifen.
- TNC formulation demonstrated enhanced cytotoxicity against MCF-7 cells compared to plain Tamoxifen.
Conclusions:
- β-cyclodextrin nanosponges are effective carriers for Tamoxifen oral delivery.
- The developed TNC formulation enhances Tamoxifen's oral bioavailability and therapeutic efficacy.
- This nanosponge system holds potential for improved breast cancer treatment strategies.
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