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Rational Design of a Transferrin-Binding Peptide Sequence Tailored to Targeted Nanoparticle Internalization
Melissa Santi1,2, Giuseppe Maccari1, Paolo Mereghetti1
1Center for Nanotechnology Innovation@NEST, Istituto Italiano di Tecnologia , Piazza San Silvestro 12, Pisa 56127, Italy.
Bioconjugate Chemistry
|December 16, 2016
Summary
Researchers developed a novel peptide coating for nanostructures that enhances transferrin receptor (TfR) targeting in cancer therapy. This innovative approach improves nanostructure delivery and function in the bloodstream.
Area of Science:
- Biotechnology
- Nanomedicine
- Molecular Biology
Background:
- The transferrin receptor (TfR) is overexpressed in many solid tumors and on the blood-brain barrier, making it a key target for cancer therapy.
- Current TfR-targeting nanostructures often lose functionality in the bloodstream due to protein interactions.
- A new strategy is needed to ensure stable and effective TfR targeting by nanostructures.
Purpose of the Study:
- To design a peptide coating that specifically binds transferrin without interfering with TfR or iron binding.
- To develop nanostructures that overcome the limitations of current TfR-targeting strategies.
- To enhance the diagnostic and therapeutic potential of nanostructures through improved targeting.
Main Methods:
- Utilized iterative multiscale modeling, quantitative structure-activity relationship (QSAR) analysis, and evolutionary algorithms to design peptide sequences.
- Screened peptide sequences for low nonspecific protein adsorption and high binding affinity to transferrin.
- Investigated cellular uptake via transferrin-dependent pathways and the effect on gold nanoparticle endocytosis.
Main Results:
- Identified peptide sequences with low nonspecific protein adsorption and high binding energy for transferrin.
- Demonstrated efficient cellular internalization via a transferrin-dependent pathway for a selected peptide.
- Showed that the peptide coating promotes transferrin-mediated endocytosis of gold nanoparticles by modifying their protein corona and facilitating oriented transferrin adsorption.
Conclusions:
- A rationally designed peptide coating effectively targets the transferrin receptor (TfR) by specifically binding transferrin.
- This strategy enhances nanostructure functionality and uptake, overcoming bloodstream limitations.
- The developed nanostructures show promise for improved diagnostic and therapeutic applications in cancer and beyond.
