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Functionalized nanoceria exhibit improved angiogenic properties.

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Functional nanoconjugates of samarium-doped cerium oxide nanoparticles show promising pro-angiogenic properties. These engineered nanoparticles promote blood vessel growth, offering potential for treating diseases linked to angiogenesis.

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Vascular Biology

Background:

  • Angiogenesis, the formation of new blood vessels, is crucial for physiological and pathological processes.
  • Developing novel therapeutic strategies to modulate angiogenesis is essential for treating various diseases.

Purpose of the Study:

  • To synthesize and characterize organosilane functionalized cerium oxide (CeO2) nanoparticles, including samarium-doped variants (SmCeO2).
  • To evaluate the pro-angiogenic potential of these functional nanoconjugates in vitro and in vivo.

Main Methods:

  • In situ synthesis and functionalization of CeO2 and SmCeO2 nanoparticles with organosilane moieties.
  • Physico-chemical characterization using TEM, XRD, DLS, FTIR, NMR, and XPS.
  • In vitro and in vivo angiogenesis assays, including chick embryo models.

Main Results:

  • Successfully prepared aqueous dispersible, functional nanoconjugates of CeO2 and SmCeO2.
  • Demonstrated that SmCeO2 nanoconjugates significantly enhanced endothelial cell proliferation.
  • Observed induced blood vessel growth in chick embryos, linked to upregulated p38 MAPK/HIF-1α signaling.

Conclusions:

  • Organosilane functionalized SmCeO2 nanoparticles exhibit significant pro-angiogenic properties.
  • These nanoconjugates show potential as therapeutic agents for cardiovascular, ischemic, and ocular diseases.
  • The p38 MAPK/HIF-1α pathway is a likely mechanism mediating the pro-angiogenic effects.