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Synthesis and Characterization of Amphiphilic Gold Nanoparticles
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Multicolored Protein Nanoparticles: Synthesis, Characterization, and Cell Uptake.

Bobbi S Stromer1, Sonali Roy2, Melissa R Limbacher1

  • 1Department of Chemistry , University of Connecticut , 55 North Eagleville Road , Storrs , Connecticut 06269-3060 , United States.

Bioconjugate Chemistry
|June 23, 2018
PubMed
Summary
This summary is machine-generated.

Researchers developed multicolored protein nanoparticles called GlowDots. These biocompatible, fluorescent nanoparticles offer tunable properties and can be functionalized for enhanced cellular uptake, serving as potential quantum dot alternatives.

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Biochemistry

Background:

  • Quantum dots (QDs) offer strong fluorescence but raise toxicity concerns.
  • Developing safe, tunable, and brightly fluorescent nanomaterials is crucial for bioimaging and diagnostics.

Purpose of the Study:

  • To synthesize and characterize novel, strongly fluorescent, multicolored protein nanoparticles (GlowDots).
  • To evaluate GlowDots as potential biocompatible alternatives to quantum dots for various applications.

Main Methods:

  • Controlled cross-linking of bovine serum albumin to form protein nanoparticles with tunable sizes (20-100 nm).
  • Loading nanoparticles with chromophores to control absorption and emission wavelengths.
  • Functionalizing nanoparticle surfaces to enhance cellular uptake.
  • Assessing cellular uptake in various cell lines (HeLa, MDA-MB-231, PC3, L6) using fluorescence imaging.

Main Results:

  • GlowDots exhibited controlled size, tunable optical properties, and high brightness (10^5 to 10^6 M^-1 cm^-1).
  • Each GlowDot was loaded with up to 214 chromophores, resulting in high molar absorptivities (10^6 M^-1 cm^-1).
  • Functionalized GlowDots demonstrated rapid uptake by multiple cancer and myoblast cell lines.

Conclusions:

  • GlowDots are biocompatible, size-tunable, biodegradable, and stable fluorescent nanoparticles.
  • Their tunable optical properties and enhanced cellular uptake make them promising substitutes for quantum dots in bioimaging and other applications.