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Enhancement of Binding Affinity of Folate to Its Receptor by Peptide Conjugation
(1) Background: The folate receptor (FR) is a target for cancer treatment and detection. Expression of the FR is restricted in normal cells but overexpressed in many types of tumors. Folate was conjugated with peptides for enhancing binding affinity to the FR. (2) Materials and Methods: For conjugat...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6539678/ https://www.ncbi.nlm.nih.gov/pubmed/31052315 http://dx.doi.org/10.3390/ijms20092152 |
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author | Dharmatti, Roopa Miyatake, Hideyuki Nandakumar, Avanashiappan Ueda, Motoki Kobayashi, Kenya Kiga, Daisuke Yamamura, Masayuki Ito, Yoshihiro |
author_facet | Dharmatti, Roopa Miyatake, Hideyuki Nandakumar, Avanashiappan Ueda, Motoki Kobayashi, Kenya Kiga, Daisuke Yamamura, Masayuki Ito, Yoshihiro |
author_sort | Dharmatti, Roopa |
collection | PubMed |
description | (1) Background: The folate receptor (FR) is a target for cancer treatment and detection. Expression of the FR is restricted in normal cells but overexpressed in many types of tumors. Folate was conjugated with peptides for enhancing binding affinity to the FR. (2) Materials and Methods: For conjugation, folate was coupled with propargyl or dibenzocyclooctyne, and 4-azidophenylalanine was introduced in peptides for “click” reactions. We measured binding kinetics including the rate constants of association (k(a)) and dissociation (k(d)) of folate-peptide conjugates with purified FR by biolayer interferometry. After optimization of the conditions for the click reaction, we successfully conjugated folate with designed peptides. (3) Results: The binding affinity, indicated by the equilibrium dissociation constant (K(D)), of folate toward the FR was enhanced by peptide conjugation. The enhanced FR binding affinity by peptide conjugation is a result of an increase in the number of interaction sites. (4) Conclusion: Such peptide-ligand conjugates will be important in the design of ligands with higher affinity. These high affinity ligands can be useful for targeted drug delivery system. |
format | Online Article Text |
id | pubmed-6539678 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-65396782019-06-04 Enhancement of Binding Affinity of Folate to Its Receptor by Peptide Conjugation Dharmatti, Roopa Miyatake, Hideyuki Nandakumar, Avanashiappan Ueda, Motoki Kobayashi, Kenya Kiga, Daisuke Yamamura, Masayuki Ito, Yoshihiro Int J Mol Sci Article (1) Background: The folate receptor (FR) is a target for cancer treatment and detection. Expression of the FR is restricted in normal cells but overexpressed in many types of tumors. Folate was conjugated with peptides for enhancing binding affinity to the FR. (2) Materials and Methods: For conjugation, folate was coupled with propargyl or dibenzocyclooctyne, and 4-azidophenylalanine was introduced in peptides for “click” reactions. We measured binding kinetics including the rate constants of association (k(a)) and dissociation (k(d)) of folate-peptide conjugates with purified FR by biolayer interferometry. After optimization of the conditions for the click reaction, we successfully conjugated folate with designed peptides. (3) Results: The binding affinity, indicated by the equilibrium dissociation constant (K(D)), of folate toward the FR was enhanced by peptide conjugation. The enhanced FR binding affinity by peptide conjugation is a result of an increase in the number of interaction sites. (4) Conclusion: Such peptide-ligand conjugates will be important in the design of ligands with higher affinity. These high affinity ligands can be useful for targeted drug delivery system. MDPI 2019-04-30 /pmc/articles/PMC6539678/ /pubmed/31052315 http://dx.doi.org/10.3390/ijms20092152 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Dharmatti, Roopa Miyatake, Hideyuki Nandakumar, Avanashiappan Ueda, Motoki Kobayashi, Kenya Kiga, Daisuke Yamamura, Masayuki Ito, Yoshihiro Enhancement of Binding Affinity of Folate to Its Receptor by Peptide Conjugation |
title | Enhancement of Binding Affinity of Folate to Its Receptor by Peptide Conjugation |
title_full | Enhancement of Binding Affinity of Folate to Its Receptor by Peptide Conjugation |
title_fullStr | Enhancement of Binding Affinity of Folate to Its Receptor by Peptide Conjugation |
title_full_unstemmed | Enhancement of Binding Affinity of Folate to Its Receptor by Peptide Conjugation |
title_short | Enhancement of Binding Affinity of Folate to Its Receptor by Peptide Conjugation |
title_sort | enhancement of binding affinity of folate to its receptor by peptide conjugation |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6539678/ https://www.ncbi.nlm.nih.gov/pubmed/31052315 http://dx.doi.org/10.3390/ijms20092152 |
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