transparent gif


Ej inloggad.

Göteborgs universitets publikationer

Blood interactions with noble metals: coagulation and immune complement activation.

Författare och institution:
Mats Hulander (Institutionen för cell- och molekylärbiologi); Jaan Hong (-); Marcus Andersson (Institutionen för cell- och molekylärbiologi); Frida Gervén (Institutionen för cell- och molekylärbiologi); Mattias Ohrlander (-); Pentti Tengvall (Institutionen för kliniska vetenskaper, sektionen för anestesi, biomaterial och ortopedi); Hans-Björne Elwing (Institutionen för cell- och molekylärbiologi)
Publicerad i:
ACS applied materials & interfaces, 1 ( 5 ) s. 1053-62
Artikel, refereegranskad vetenskaplig
Sammanfattning (abstract):
Noble metals are interesting biomaterials for a number of reasons, e.g., their chemical inertness and relative mechanical softness, silver's long known antimicrobial properties, and the low allergenic response shown by gold. Although important for the final outcome of biomaterials, little is reported about early events between pure noble metals and blood. In this article, we used whole blood in the "slide chamber model" to study the activation of the immune complement activation, generation of thrombin/antithrombin (TAT) complexes, and platelet depletion from blood upon contact with silver (Ag), palladium (Pd), gold (Au), titanium (Ti), and Bactiguard, a commercial nanostructured biomaterial coating comprised of Ag, Pd, and Au. The results show the highest TAT generation and platelet depletion on Ti and Au and lower on Pd, Ag, and the Bactiguard coating. The immune complement factor 3 fragment (C3a) was generated by the surfaces in the following order: Ag > Au > Pd > Bactiguard > Ti. Quartz crystal microbalance adsorption studies with human fibrinogen displayed the highest deposition to Ag and the lowest onto the Bactiguard coating. The adsorbed amounts of fibrinogen did not correlate with thrombogenicity in terms of TAT formation and platelet surface accumulation in blood. The combined results suggest, hence, that noble metal chemistry has a different impact on the protein adsorption properties and general blood compatibility. The low thrombogenic response by the Bactiguard coating cannot be explained by any of the single noble metal properties but is likely a successful combination of the nanostructure, nanogalvanic effects, or combinatory chemical and physical materials properties.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Klinisk medicin ->
Odontologi ->
Klinisk medicin ->
Odontologi ->
Cell- och molekylärbiologi
Biocompatible Materials, Blood Coagulation, drug effects, genetics, Complement Activation, immunology, Cytokines, Humans, Materials Testing, Metals, pharmacology, palladium, gold, titanium, immune complement, protein adsorption, coagulation, platelets, nanostructure, QCM-D
Postens nummer:
Posten skapad:
2010-11-11 11:29
Posten ändrad:
2011-01-20 10:00

Visa i Endnote-format

Göteborgs universitet • Tel. 031-786 0000
© Göteborgs universitet 2007