Platelet and leukocyte adhesion to albumin binding self-assembled monolayers

• Tipo: Artigo em Revista Científica Internacional
• Data: 2011

Autores

Ines C Goncalves (Autor) FEUP; Cristina C L Martins (Autor) Outra; Judite N Barbosa (Autor) ICBAS; Pedro Oliveira (Autor) ICBAS; Mario A Barbosa (Autor) FEUP; Buddy D Ratner (Autor) Outra

Revista

Título: Journal of Materials Science: Materials in Medicine

Vol. 22 Nº 6

Páginas: 2053-2063

ISSN: 0957-4530

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 16 Citações

Scopus - 18 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Biotecnologia ambiental

Outras Informações

ID Authenticus: P-002-N5R

DOI: 10.1007/s10856-011-4381-9

Abstract (EN): This study reports the use of tetraethylene glycol-terminated self-assembled monolayers (EG(4) SAMs) as a background non-fouling surface to study the effect of an 18 carbon ligand (C18) on albumin selective and reversible adsorption and subsequent platelet and leukocyte adhesion. Surface characterization techniques revealed an efficient immobilization of different levels of C18 ligand on EG(4) SAMs and an increase of surface thickness and hydrophobicity with the increase of C18 ligands. Albumin adsorption increased as the percentage of C18 ligands on the surface increased, but only 2.5%C18 SAMs adsorbed albumin in a selective and reversible way. Adherent platelets also increased with the amount of immobilized C18. Pre-immersion of samples in albumin before contact with platelets demonstrated an 80% decrease in platelet adhesion. Pre-immersion in plasma was only relevant for 2.5%C18 SAMs since this was the only surface to have less platelet adhesion compared to buffer pre-immersion. EG(4) SAMs adhered negligible amounts of leukocytes, but surfaces with C18 ligands have some adherent leukocytes. Except for 10%C18 SAMs, which increased leukocyte adhesion after albumin pre-adhesion, protein pre-immersion did not influence leukocyte adhesion. It has been shown that a surface with a specific surface concentration of albumin-binding ligands (2.5%C18 SAMs) can recruit albumin selectively and reversibly and minimize the adhesion of platelets, despite still adhering some leukocytes.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 11