Protein adsorption/desorption dynamics on Ca-enriched titanium surfaces: biological implications

Author:

Romero-Gavilán FranciscoORCID,Cerqueira Andreia,Anitua Eduardo,Tejero Ricardo,García-Arnáez Iñaki,Martinez-Ramos Cristina,Ozturan Seda,Izquierdo Raul,Azkargorta Mikel,Elortza Félix,Gurruchaga Mariló,Goñi Isabel,Suay Julio

Abstract

AbstractCalcium ions are used in the development of biomaterials for the promotion of coagulation, bone regeneration, and implant osseointegration. Upon implantation, the time-dependent release of calcium ions from titanium implant surfaces modifies the physicochemical characteristics at the implant–tissue interface and thus, the biological responses. The aim of this study is to examine how the dynamics of protein adsorption on these surfaces change over time. Titanium discs with and without Ca were incubated with human serum for 2 min, 180 min, and 960 min. The layer of proteins attached to the surface was characterised using nLC-MS/MS. The adsorption kinetics was different between materials, revealing an increased adsorption of proteins associated with coagulation and immune responses prior to Ca release. Implant–blood contact experiments confirmed the strong coagulatory effect for Ca surfaces. We employed primary human alveolar osteoblasts and THP-1 monocytes to study the osteogenic and inflammatory responses. In agreement with the proteomic results, Ca-enriched surfaces showed a significant initial inflammation that disappeared once the calcium was released. The distinct protein adsorption/desorption dynamics found in this work demonstrated to be useful to explain the differential biological responses between the titanium and Ca-ion modified implant surfaces. Graphic abstract

Funder

Universitat Jaume I

Ministerio de Economía y Competitividad

Generalitat Valenciana

Euskal Herriko Unibertsitatea

Eusko Jaurlaritza

Publisher

Springer Science and Business Media LLC

Subject

Inorganic Chemistry,Biochemistry

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