title: Adsorption of human serum albumin on the chrysotile surface: a molecular dynamics and spectroscopic investigation.
abstract: The human serum albumin (HSA) secondary structure modifications induced by the chrysotile surface have been investigated via computational molecular dynamics (MD) and experimental infrared spectroscopy (FTIR) on synthetic chrysotile nanocrystals coated with different amount of HSA. MD simulations, conducted by placing various albumin subdomains close to the fixed chrysotile surface, show an initial adsorption phase, accompanied by local rearrangements of the albumin motifs in contact with the chrysotile layer. Next, large-scale rearrangements follow with consequent secondary structure modifications. Gaussian curve fitting of the FTIR spectra obtained for HSA-coated synthetic chrysotile nanocrystals has allowed the quantification of HSA structural modifications as a function of the amount of protein adsorbed. The experimental results support the atomistic computer simulations providing a realistic description of the adsorption of plasma proteins onto chrysotile and unravelling a key step in the understanding of asbestos toxicity.
authors.affiliation: Institute of Pharmaceutical and Toxycological Chemistry P. Pratesi, University of Milano, Viale Abruzzi 42, 20131 Milano, Italy. roberto@artali@tiscali.it
authors.forename: Roberto
authors.initials: R
authors.lastname: Artali
authors.forename: Antonio
authors.initials: A
authors.lastname: Del Pra
authors.forename: Elisabetta
authors.initials: E
authors.lastname: Foresti
authors.forename: Isidoro Giorgio
authors.initials: IG
authors.lastname: Lesci
authors.forename: Norberto
authors.initials: N
authors.lastname: Roveri
authors.forename: Piera
authors.initials: P
authors.lastname: Sabatino
mesh_terms: D000327:Adsorption; D017632:Asbestos, Serpentine / Q000737:chemistry* / Q000633:toxicity; D003198:Computer Simulation; D006801:Humans; D008958:Models, Molecular; D053758:Nanoparticles / Q000737:chemistry*; D012709:Serum Albumin / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D017632:Asbestos, Serpentine; D012709:Serum Albumin