How Spacer Length Affects Heparin Attachment to Titanium Surfaces
Author Information
Author(s): David Tebbe, Roger Thull, Uwe Gbureck
Primary Institution: University of Würzburg
Hypothesis
Using longer spacer chains will result in higher mobility of immobilised heparin and hence a higher biological potency of the drug.
Conclusion
The remaining activity of heparin was found to be highest for the covalent attachment with Triamino-APMS due to the long chain of this spacer molecule.
Supporting Evidence
- Zeta-potential measurements confirmed successful heparin coupling.
- Triamino-APMS showed the highest biological activity of heparin.
- Fibrinogen adsorption was lower on surfaces with longer spacer chains.
Takeaway
This study looked at how different lengths of spacer molecules affect how well heparin sticks to titanium surfaces. Longer spacers help heparin work better.
Methodology
Heparin was covalently attached to titanium surfaces using different silane coupling agents, and their effectiveness was measured using various photometric and QCM-D techniques.
Limitations
The study did not explore the long-term stability of the heparin attachment or its performance in vivo.
Digital Object Identifier (DOI)
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