Interaction of polyelectrolyte-shell cubosomes with serum albumin for triggering drug release in gastrointestinal cancer.
Barbara V PimentaRafael R M MadridPatrick D MathewsKarin A RiskeWatson LohBorislav AngelovAngelina AngelovaOmar MertinsPublished in: Journal of materials chemistry. B (2023)
Nano-structured and functionalized materials for encapsulation, transport, targeting and controlled release of drugs are of high interest to overcome low bioavailability in oral administration. We develop lipid-based cubosomes, which are surface-functionalized with biocompatible chitosan- N -arginine and alginate, displaying internal liquid crystalline structures. Polyelectrolyte-shell (PS) cubosomes have pH-responsive characteristics profitable for oral delivery. The obtained PScubosomes can strongly interact with serum albumin, a protein which is released in the stomach under gastric cancer conditions. An effective thermodynamic PScubosome-protein interaction was characterized at pH 2.0 and 7.4 by isothermal titration calorimetry at 37 °C. A high increment of the albumin conformation transition temperature was evidenced by differential scanning calorimetry upon incubation with PScubosomes. The performed structural studies by synchrotron small-angle X-ray scattering (SAXS) revealed essential alterations in the internal liquid crystalline topology of the nanocarriers including an Im 3 m to Pn 3 m transition and a reduction of the cubic lattice parameters. The PScubosome nanoparticle interaction with serum albumin, leading to inner structural changes in a range of temperatures, promoted the release of water from the cubosomal nanochannels. Altogether, the results revealed effective interactions of the PScubosomes with albumin under simulated gastrointestinal pH conditions and suggested promising nanocarrier characteristics for triggered oral drug release.
Keyphrases
- drug release
- drug delivery
- high resolution
- cancer therapy
- amino acid
- ionic liquid
- room temperature
- quantum dots
- single cell
- protein protein
- nitric oxide
- magnetic resonance imaging
- electron microscopy
- molecularly imprinted
- binding protein
- mass spectrometry
- squamous cell
- small molecule
- hyaluronic acid
- liquid chromatography
- contrast enhanced
- nucleic acid