Artigo De: orcid, cienciavitae
Gallic Acid–Triethylene Glycol Aptadendrimers Synthesis, Biophysical Characterization and Cellular Evaluation
Pharmaceutics
2022 — MDPI
—Informações chave
Autores:
Publicado em
14/11/2022
Resumo
Herein, we describe the synthesis of an aptadendrimer by covalent bioconjugation of a gallic acid–triethylene glycol (GATG) dendrimer with the G-quadruplex (G4) AT11 aptamer (a modified version of AS1411) at the surface. We evaluated the loading and interaction of an acridine orange ligand, termed C8, that acts as an anticancer drug and binder/stabilizer of the G4 structure of AT11. Dynamic light scattering experiments demonstrated that the aptadendrimer was approximately 3.1 nm in diameter. Both steady-state and time-resolved fluorescence anisotropy evidenced the interaction between the aptadendrimer and C8. Additionally, we demonstrated that the iodine atom of the C8 ligand acts as an effective intramolecular quencher in solution, while upon complexation with the aptadendrimer, it adopts a more extended conformation. Docking studies support this conclusion. Release experiments show a delivery of C8 after 4 h. The aptadendrimers tend to localize in the cytoplasm of various cell lines studied as demonstrated by confocal microscopy. The internalization of the aptadendrimers is not nucleolin-mediated or by passive diffusion, but via endocytosis. MTT studies with prostate cancer cells and non-malignant cells evidenced high cytotoxicity mainly due to the C8 ligand. The rapid internalization of the aptadendrimers and the fluorescence properties make them attractive for the development of potential nanocarriers.
Detalhes da publicação
Autores da comunidade :
António Manuel Rocha Paulo
ist126677
Versão da publicação
AO - Versão original do autor
Editora
MDPI
Ligação para a versão da editora
https://www.mdpi.com/journal/pharmaceutics
Título do contentor da publicação
Pharmaceutics
Primeira página ou número de artigo
2456
Volume
14
Fascículo
11
WoS (Web of Science)
Domínio Científico (FOS)
chemical-sciences - Química
Palavras-chave
- gallic acid–triethylene glycol dendrimers
- G-quadruplex aptamers
- acridine orange ligands
- aptadendrimer
- biophysical studies
Idioma da publicação (código ISO)
eng - Inglês
Identificador alternativo (URI)
https://doi.org/10.3390/pharmaceutics14112456
Acesso à publicação:
Acesso Aberto
Licença Creative Commons
CC-BY - CC-BY