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Context: Docetaxel is now a major antitumor drug in clinical use for the treatment of a variety of tumors. The ethanol/Tween 80 solvent required in the formulation to increase the docetaxel solubility is at least partly responsible for the hypersensitivity reaction, decreased uptake by tumor tissue, and increased exposure to other body compartments. Objective: The present study was aimed at developing hydrosoluble DTX-FA-HSANPs targeting tumor cells and to investigate antitumor activities of the nanoparticles. Materials and methods: The DTX-HSANPs were prepared using a desolvation technique and the carboxylic groups of NHS-folate were conjugated with the amino groups of the human serum albumin nanoparticles, and studied their size and zeta potential, drug loading efficiency, surface morphology, release properties in vitro, and antitumor activities. Results: The spherical nanoparticles obtained were negatively charged with a zeta potential of about −30 mV and characterized around 150 nm with a narrow size distribution. Drug loading efficiency was approximately 17.2%. The folate-decorated nanoparticles targeted a human hepatoma cell line effectively. The in vitro drug release of DTX-FA-HSANPs in the first 96 h corresponded with the following equation: Q = 18.87851 − 0.13866 t + 0.21276 t2 − 0.00704 t3 + 0.0000847854 t4 − 0.00000034991 t5 ( R2 = 0.98155). Moreover, the in vitro antitumor activities of DTX-FA-HSANPs were close to the activities of the positive control (docetaxel). The in vivo inhibition ratios of DTX-FA-HSANPs and docetaxel were 66.2% and 59.5%, respectively, at a dose of 5 mg/kg. Discussion and conclusion: In light of the observed antitumor activities, it would be of considerable interest to collect sufficient data for the clinical application of docetaxel-loaded nanoparticles. [ABSTRACT FROM AUTHOR]

Coenzyme Q10 (CoQ10) has been found to be effective in cardiovascular diseases and neurodegenerative diseases. However, the extremely poor solubility of CoQ10 in water is hampering its bioavailability as a therapeutic agent. To overcome solubility problem, we micronized the CoQ10 powder to the nanometer level by the supercritical solution (RESS) process, which does not employ any toxic organic solvent. The obtained CoQ10 nanoparticles were 147.9 +/- 27.3nm in diameter and their physicochemical properties were characterized by scanning electron microscopy (SEM), dynamic light scattering (DLS), liquid chromatography-mass spectrometry (LC-MS), X-ray diffractometry (XRD) and differential scanning calorimetry (DSC) analyzes. Moreover, the pharmacokinetics of the CoQ10 nanoparticles, in comparison with the unprocessed CoQ10 powder, were investigated in rats. From the results of physicochemical and pharmacokinetic studies, the CoQ10 nanoparticles had high solubility in water and possessed less crystalline structure, which can enhance the bioavailability of CoQ10, and provide a water-soluble solid dosage form of CoQ10.