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Interface-driven Sr-morin complexation at Langmuir monolayers for bioactive coating design.

M A E Cruz1, M P R Soares2, W Pazin3

  • 1Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Departamento de Química, Brazil.

Colloids and Surfaces. B, Biointerfaces
|August 7, 2019
PubMed
Summary

We explored strontium-morin complexes within lipid membranes, finding they enhance osteoblast growth on titanium surfaces. This suggests potential for advanced bioactive coatings in implants, promoting faster bone integration.

Keywords:
Flavonoid-metal complexesFluorescenceLangmuir monolayersOsteoblastsSurface modificationTitanium

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Area of Science:

  • Biomaterials Science
  • Supramolecular Chemistry
  • Surface Chemistry

Background:

  • Flavonoid-metal complexes are known for luminescent and biological properties.
  • Investigating flavonoid complexation within lipid membranes is underexplored but crucial for understanding biological activity and designing novel supramolecular structures.

Purpose of the Study:

  • To investigate strontium-morin complexation within an octadecylphosphonic acid (OPA) Langmuir monolayer.
  • To explore the potential of these complexes as bioactive coatings for implants, focusing on osteointegration.

Main Methods:

  • Surface pressure isotherms to monitor morin incorporation and Sr2+ complexation in OPA monolayers.
  • Electronic absorption spectroscopy and fluorescence techniques to confirm Sr-morin complexation.
  • Langmuir-Blodgett (LB) film deposition on titanium surfaces.

Main Results:

  • Sr-morin complexation was successfully achieved within the OPA Langmuir monolayer at the air-liquid interface, even under conditions where it typically doesn't occur in solution.
  • OPA/Sr-morin coatings on titanium exhibited increased surface free energy and polarity.
  • These enhanced surface properties promoted serum protein adsorption and osteoblast growth and differentiation.

Conclusions:

  • Flavonoid-metal complexation within lipid membranes is feasible and can be driven by interfacial thermodynamics.
  • OPA/Sr-morin coatings show significant promise for developing bioactive surfaces for medical implants, enhancing osteointegration.
  • This research opens avenues for understanding flavonoid roles at membranes and designing advanced biomaterials.