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Asymmetric Lipid Bilayer01:35

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Biological membranes show uneven distribution of different types of lipids in the inner and outer layers, resulting in transverse asymmetric membranes. The treatment of the erythrocyte membrane with the enzyme phospholipase confirmed the asymmetric nature of the lipid bilayer. The enzyme hydrolyzes lipids into fatty acids and hydrophilic groups. The phospholipase acts only on the outer layer of the membrane, while the inner layer remains intact. The phospholipase treatment resulted in 80%...
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Atomic Force Microscopy Imaging and Force Spectroscopy of Supported Lipid Bilayers
10:15

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Published on: July 22, 2015

Lysophosphatidylcholine-arbutin complexes form bilayer-like structures.

M A Frías1, B Winik, M B Franzoni

  • 1Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, San Lorenzo 456 (4000) Tucumán, Argentina.

Biochimica Et Biophysica Acta
|March 4, 2008
PubMed
Summary
This summary is machine-generated.

Monomyristoylphosphatidylcholine (lysoPC) and arbutin form stable association complexes, creating interdigitated bilayer vesicles. This discovery enhances arbutin

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Area of Science:

  • Biochemistry
  • Materials Science
  • Pharmacology

Background:

  • Arbutin inhibits melanin production and phospholipase activity.
  • Stabilizing arbutin in lipid aggregates is crucial for medical applications.
  • Monomyristoylphosphatidylcholine (14:0 lysoPC) is a potential lipid carrier.

Purpose of the Study:

  • To investigate the formation of association complexes between 14:0 lysoPC and arbutin.
  • To characterize the structure and interactions within these complexes for potential drug delivery.

Main Methods:

  • Electron Microscopy (EM) for particle size determination.
  • 31P Nuclear Magnetic Resonance (31P NMR) for structural analysis.
  • Electronic Paramagnetic Resonance (EPR) and Fourier Transform Infrared Spectroscopy (FTIR) for interaction studies.

Main Results:

  • EM revealed particles approximately 6 nm in diameter.
  • 31P NMR and La3+ ion studies indicated the formation of vesicles with interdigitated bilayers.
  • FTIR and EPR confirmed hydrogen bonding and hydrophobic interactions between lysoPC and arbutin.

Conclusions:

  • Arbutin and 14:0 lysoPC form stable interdigitated bilayer vesicles.
  • These findings support the potential of arbutin-lysoPC complexes for medical applications.
  • The study provides a structural model for arbutin-lipid interactions.