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Biophysical study on the interaction of an anesthetic, vecuronium bromide with human serum albumin using spectroscopic and calorimetric methods

Paper ID Volume ID Publish Year Pages File Format Full-Text
29966 44448 2014 9 PDF Available
Title
Biophysical study on the interaction of an anesthetic, vecuronium bromide with human serum albumin using spectroscopic and calorimetric methods
Abstract

•Vecuronium bromide (VB) quenches the fluorescence of HSA via static mechanism.•The formation of 1:1 complex and week binding affinity of VB to HSA were assigned.•VB binds HSA through H-bonding or van der Waals forces.•The conformation of HSA was altered by the drug.

The interactions between an anesthetic, vecuronium bromide (VB) and human serum albumin (HSA) have been investigated systematically by steady-state/time-resolved fluorescence, circular dichroism (CD), UV–vis absorption, Fourier transform infrared spectroscopy (FTIR), mass spectroscopy and differential scanning calorimetry (DSC) methods under physiological conditions. The fluorescence quenching observed is attributed to the formation of a complex between HSA and VB, and the reverse temperature effect of the fluorescence quenching has been found and discussed. Fluorescence analysis has proved that there is one classical binding site on HSA for VB with a relative weak binding constant of 1.07 × 104 M−1 at 298 K. The primary binding pattern is determined by hydrogen bonding or van der Waals forces occurring in site I of HSA with ΔG° = −2.30 × 104 J mol−1, ΔS° = −233 J mol−1 K−1 and ΔH° = −9.23 × 104 J mol−1 at 298 K. VB could slightly change the secondary structure and induce unfolding of the polypeptides of protein. The DSC results provide quantitative information on the effect of VB on the stability of serum albumin. It is shown that VB can efficiently bind with HSA and be transported to the focuses needed.

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Keywords
Vecuronium bromide; Human serum albumin; Spectroscopy; Calorimetry; Physiology
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Biophysical study on the interaction of an anesthetic, vecuronium bromide with human serum albumin using spectroscopic and calorimetric methods
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 140, November 2014, Pages 381–389
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us