Synthesis of hydroxyethyl starch 200/0.5‐loaded albumin nanoparticles: biocompatibility and interaction mechanism

Author:

Qu Lingyan1,Zhou Haixia2,Zhang Jianzhong1,Huang Shaoyan1,Liu Mingming3ORCID

Affiliation:

1. Department of Anesthesiology Yantaishan Hospital Yantai China

2. Department of Anesthesiology People's Hospital of Dongying Dongying China

3. Department of Anesthesiology Weifang People's Hospital Weifang China

Abstract

AbstractWe aimed to synthesize hydroxyethyl starch (HES) 200/0.5‐loaded bovine serum albumin nanoparticles (HBNs) and investigate the compatibility and binding mechanism in simulated physiological environments. Here, to elucidate the morphology, biocompatibility, and formation mechanism of HBNs, techniques such as scanning electron microscopy, haemolysis test, fluorescence, and circular dichroism spectroscopy were applied. The thermodynamic parameters at body temperature (ΔS° = −26.7 J·mol−1·K−1, ΔH° = −3.20 × 104 J·mol−1, and ΔG = −2.35 × 104 J·mol−1) showed a 1:1 binding stoichiometry, which was formed by hydrogen bonds and van der Waals interactions. In addition, the conformational analysis showed that the microenvironment of fluorophores was altered with the adaptational protein secondary structural changes. Energy transfer occurred from the fluorophores to HES with a high possibility. All these results provided accurate and complete primary data for demonstrating the interaction mechanisms of HES with BSA, which helps to understand its pharmaceutical effects in blood.

Funder

Natural Science Foundation of Shandong Province

Publisher

Wiley

Subject

Chemistry (miscellaneous),Biophysics

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