Folic acid functionalization for targeting self-assembled paclitaxel-based nanoparticles
作者:Eleonora Colombo、Davide Andrea Coppini、Simone Maculan、Pierfausto Seneci、Benedetta Santini、Filippo Testa、Lucia Salvioni、Giovanni Maria Vanacore、Miriam Colombo、Daniele Passarella
DOI:10.1039/d2ra06306a
日期:——
Hetero-nanoparticles self-assembled from a conjugate bearing folicacid as the targeting agent, and another bearing paclitaxel as the active agent are reported. Hetero-nanoparticles containing varying percentages of folicacid conjugates are characterised, and their biological activity is determined.
Cryptophane-Folate Biosensor for <sup>129</sup>Xe NMR
作者:Najat S. Khan、Brittany A. Riggle、Garry K. Seward、Yubin Bai、Ivan J. Dmochowski
DOI:10.1021/bc5005526
日期:2015.1.21
Folate-conjugated cryptophane was developed for targeting cryptophane to membrane-bound folate receptors that are overexpressed in many human cancers. The cryptophane biosensor was synthesized in 20 nonlinear steps, which included functionalization with folate recognition moiety, solubilizing peptide, and Cy3 fluorophore. Hyperpolarized Xe-129 NMR studies confirmed xenon binding to the folate-conjugated cryptophane. Cellular internalization of biosensor was monitored by confocal laser scanning microscopy and quantified by flow cytometry. Competitive blocking studies confirmed cryptophane endocytosis through a folate receptor-mediated pathway. Flow cytometry revealed 10-fold higher cellular internalization in KB cancer cells overexpressing folate receptors compared to HT-1080 cells with normal folate receptor expression. The biosensor was determined to be nontoxic in HT-1080 and KB cells by MTT assay at low micromolar concentrations typically used for hyperpolarized Xe-129 NMR experiments.