Interaction between hydroxyethyl starch and propofol: computational and laboratorial study

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Silva, A (Author) Other; Sousa, E (Author) FFUP; Palmeira, A (Author) Other; Amorim, P (Author) Other; de Pinho, PG (Author) FFUP; Ferreira, DA (Author) Other

Journal

Title: Journal of Biomolecular Structure and Dynamics

Vol. 32

Pages: 1864-1875

ISSN: 0739-1102

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 8 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-008-PKA

DOI: 10.1080/07391102.2013.840248

Abstract (EN): Background: Hydroxyethyl starch (HES) is one of the most used colloids for intravascular volume replacement during anesthesia. Aim: To investigate the existence of a chemical interaction between HES and the anesthetic propofol by in vitro propofol dosing, computational docking, and examination of a complex between propofol and HES by infrared (IR), ultraviolet (UV), and H-1 and C-13 nuclear magnetic resonance (NMR) spectroscopy. Methods: Ten samples with human plasma mixed with HES or lactated Ringers (n = 5 for each fluid) were prepared, and the propofol free fraction was quantified until 50 min, using gas chromatography-mass spectrometry. The docking study was performed between HES and propofol and compared with controls. The binding affinities between HES and the small molecules were evaluated by binding free energy approximation (Delta Gb, kJ mol(-1)). The IR, UV, and NMR spectra were measured for propofol, HES, and a mixture of both obtained by the kneading method. Results: Propofol concentrations were significantly lower in the HES samples than in the LR samples (p = .021). The spectroscopic characterization of propofol combined with HES revealed differences in spectra and docking studies reinforced a potential interaction between propofol and HES. Conclusions: Propofol and HES form a complex with different physical-bio-chemical behavior than the single drugs, which may be an important drug interaction. Further studies should evaluate its clinical effects.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12