Structural and Mechanical Properties of Thin Films of Bovine Submaxillary Mucin (BSM) vs. Porcine Gastric Mucin (PGM) on a Hydrophobic Surface in Aqueous Solutions

Madsen, Jan BuskDepartment of Mechanical Engineering, Technical University of Denmark , 2800 Kongens Lyngby, Denmark (författare)

The structural and mechanical properties of thin films generated from two types of mucins, namely, bovine submaxillary mucin (BSM) and porcine gastric mucin (PGM) in aqueous environment were investigated with several bulk and surface analytical techniques. Both mucins generated hydrated films on hydrophobic polydimethylsiloxane (PDMS) surfaces from spontaneous adsorption arising from their amphiphilic characteristic. However, BSM formed more elastic films than PGM at neutral pH condition. This structural difference was manifested from the initial film formation processes to the responses to shear stresses applied to the films. Acidification of environmental pH led to strengthening the elastic character of BSM films with increased adsorbed mass, whereas an opposite trend was observed for PGM films. We propose that this contrast originates from that negatively charged motifs are present for both the central and terminal regions of BSM molecule, whereas a similar magnitude of negative charges is localized at the termini of PGM molecule. Given that hydrophobic motifs acting as an anchor are also localized in the terminal region, electrostatic repulsion between anchoring units of PGM molecules on a nonpolar PDMS surface leads to weakening of the mechanical integrity of the films.

Sotres, JavierMalmö högskola,Institutionen för biomedicinsk vetenskap (BMV),Biofilms Research Center for Biointerfaces(Swepub:mau)hsjaso (författare)
Pakkanen, Kirsi I.Department of Mechanical Engineering, Technical University of Denmark , 2800 Kongens Lyngby, Denmark (författare)
Efler, PetrDepartment of Mechanical Engineering, Technical University of Denmark , 2800 Kongens Lyngby, Denmark (författare)
Svensson, BirteEnzyme and Protein Chemistry, Department of Systems Biology, Technical University of Denmark , 2800 Kongens Lyngby, Denmark (författare)
Hachem, Maher AbouEnzyme and Protein Chemistry, Department of Systems Biology, Technical University of Denmark , 2800 Kongens Lyngby, Denmark (författare)
Arnebrant, ThomasMalmö högskola,Institutionen för biomedicinsk vetenskap (BMV),Biofilms Research Center for Biointerfaces(Swepub:mau)hsthar (författare)
Lee, SeunghwanDepartment of Mechanical Engineering, Technical University of Denmark , 2800 Kongens Lyngby, Denmark (författare)
Department of Mechanical Engineering, Technical University of Denmark , 2800 Kongens Lyngby, DenmarkInstitutionen för biomedicinsk vetenskap (BMV) (creator_code:org_t)

Ingår i:Langmuir: American Chemical Society (ACS)32:38, s. 9687-96960743-74631520-5827

Av författaren/redakt...: Madsen, Jan Busk; Sotres, Javier; Pakkanen, Kirsi ...; Efler, Petr; Svensson, Birte; Hachem, Maher Ab ...; visa fler...; Arnebrant, Thoma ...; Lee, Seunghwan; visa färre...

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