Related Experiment Video
Updated: Aug 22, 2026

Preparation, Administration, and Assessment of In Vivo Tissue-Specific Cellular Uptake of Fluorescent Dye-Labeled Liposomes
Published on: July 30, 2020
Study on the bioavailability of nateglinide-hydroxypropyl-beta-cyclodextrin complex capsule in rabbits by liquid
Zhonggui He1, Xiaoyan Chen, Dafang Zhong
1School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China.
Abstract:
To evaluate the bioavailability of nateglinide-hydroxypropyl-beta-cyclodextrin (HPCD) complex, a rapid and specific liquid chromatographic-tandem mass spectrometric method was developed and validated to determine nateglinide in rabbit serum. The analyte was extracted from serum samples by liquid-liquid extraction, separated on a Zorbax C(18) column and detected by tandem mass spectrometry with an atmospheric pressure chemical ionization interface. Daidzein was used as the internal standard. The method has a lower limit of quantitation of 0.25 mg/L using 200 micro L serum. The intra- and inter-day relative standard deviations calculated from quality control (QC) samples were below 4%. The inter-day relative error was within 1%. Nateglinide serum concentrations in rabbits given nateglinide-hydroxypropyl-beta-cyclodextrin complex were much higher than those given the free drug. Significant difference was observed in main pharmacokinetic parameters of t(max) and C(max) but not AUC(0-t) between the complex and free drug. It was concluded that the absorption rate of nateglinide-HPCD complex was enhanced, compared with that of nateglinide free drug.
Related Concept Videos
Methods for Studying Drug Absorption: In vitro
The diffusion cell method uses a two-compartment cell, including a donor compartment with the drug solution, which simulates the environment where the drug is applied, and a receptor compartment with a buffer solution, which simulates the environment...
Bioavailability Enhancement: Drug Stability Enhancement and GI Retention
Measurement of Bioavailability: Pharmacokinetic Methods
Modified-Release Drug Delivery Systems: Bioavailability
Bioavailability: Overview
Bioavailability: Overview
