Comparison of adsorption and conjugation of Herceptin on poly(lactic-co-glycolic acid) nanoparticles - Effect on cell internalization in breast cancer cells.

Surfaces of nanoparticles with are commonly modified to enhance the targeting effect. In this study, we performed surface modifications of docetaxel (DTX)-loaded poly(lactic-co-glycolic acid) nanoparticles (PNPs) with Herceptin® (HCT) to improve the internalization and cytotoxicity in breast cancer cells. The PNPs were prepared with surfactant, poly(ethylene-alt-maleic anhydride) (PEMA), including a number of carboxyl groups for conjugation.

Solid dispersion of dutasteride using the solvent evaporation method: Approaches to improve dissolution rate and oral bioavailability in rats.

The aim of this study was to develop a dutasteride (DUT) solid dispersion (SD) using hydrophilic substances to enhance its dissolution (%) and oral bioavailability in rats. DUT-SD formulations were prepared with various co-polymers using a solvent evaporation method. The physical properties of DUT-SD formulations were confirmed using field emission scanning electron microscopy (FE-SEM), differential scanning calorimetry (DSC), powder X-ray diffraction (PXRD), and attenuated total reflectance Fourier transform infrared (ATR-FT-IR) spectroscopy.

Tadalafil solid dispersion formulations based on PVP/VA S-630: Improving oral bioavailability in rats.

Here, solid dispersion (SD) techniques were utilized to improve the oral bioavailability of tadalafil (TDF). Poly(vinyl pyrrolidone-covinyl acetate) (PVP/VA S-630; 60% VP and 40% VA; MW 50,000) SD formulations were previously found to improve the solubility and dissolution (%) of TDF. The effect of various weak acids and bases on SD formulations was also investigated herein.

Use of acidifier and solubilizer in tadalafil solid dispersion to enhance the in vitro dissolution and oral bioavailability in rats.

The purpose of this study is to improve the solubility, in vitro dissolution, and oral bioavailability in rats of tadalafil (TDF) by using SD technique with a weak acid and a copolymer. TDF-SD was prepared via solvent evaporation, coupled with the incorporation of an acidifier and solubilizer. Tartaric acid enhanced the solubility of TDF over 5-fold in DW, and Soluplus enhanced the solubility of TDF over 8.

Enhancing the in vitro anticancer activity of albendazole incorporated into chitosan-coated PLGA nanoparticles.

To improve the solubility and anticancer activity of albendazole (ABZ), chitosan (CS)-coated poly-dl-lactic-co-glycolic acid (PLGA) nanoparticles were developed. CS was used to coat ABZ-loaded PLGA nanoparticles to enhance both mucoadhesiveness and colloidal stability. CS-coated PLGA nanoparticles were prepared by suspending the nanoparticles in CS solution after solvent diffusion.

Solubilization and formulation of chrysosplenol C in solid dispersion with hydrophilic carriers.

We investigated how to overcome problems associated with the solubility, dissolution, and oral bioavailability of the poorly water-soluble drug compound, chrysosplenol C (CRSP), as well as the effects of single and binary hydrophilic polymers (PVP K-25 and/or PEG 6000) on the solubility and dissolution parameters of CRSP. Then an optimized formulation was further developed with a surfactant. To select a surfactant suitable for a CRSP-loaded solid dispersion (SD), the solubility of CRSP in distilled water containing 1% surfactant was compared with the solubilities in other surfactants.