Exploring the interaction of nanocomposite composed of Fe3O4, CaAl layered double hydroxide and lamivudine drug with Human serum albumin (HSA): Spectroscopic studies

Subject Areas : Journal of Nanoanalysis

Nahid  Shahabadi ¹ (Department of Chemistry, Faculty of Science, Razi University, Kermanshah, Iran)
Mahtab  Razlansari ² (Department of Chemistry, Faculty of Science, Razi University, Kermanshah, Iran)

Received: 2018-05-24 Accepted : 2018-05-24 Published : 2018-06-30

Keywords: nanocomposite, interaction, Lamivudine, Double layered hydroxide, HAS,

Abstract :

In the present work, the interaction ofFe3O4@CaAl LDH@ Lamivudine with human serum albumin (HSA) was investigated by applying UV–vis and fluorescence spectra. The nanocomposite was quenching the natural fluorescence of HSA, which was indicated the static quenching mechanism. The consequences demonstrated that this nanocomposite can strongly bind to HSA molecules. According to fluorescence quenching computations, the bimolecular quenching constant (kq), apparent quenching constant (KSV) at various temperatures was calculated (288, 298, 310 k). The binding constants Kb were 12187.09 L mol−1, 62849.24 L mol−1 and 350429 L mol−1 at 288 K, 298 K and 310 K respectively, and the number of binding sites n is almost >1. competitive results show that the binding site of nanocomposite placed in subdomain ІІІA (site ІІ) of HSA. The thermodynamic parameters defined by the Van’t Hoff analysis of the binding constants (ΔH 113.211 kJ mol−1 and ΔS 471.4703 J mol−1 K−1) clearly illustrated that the hydrophobic force plays a major role in the process. To compare binding behavior and mechanism of the antiviral drug which was loaded on Fe3O4@CaAl LDH with HSA, we carried out fluorescence and UV-Visible spectroscopy to investigate the interactions of Fe3O4@CaAl LDH@ Lamivudine with HSA.

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