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Márquez-Miranda V, Peñaloza JP, Araya-Durán I, Reyes R, Vidaurre S, Romero V, Fuentes J, Céric F, Velásquez L, González-Nilo FD, Otero C. Effect of Terminal Groups of Dendrimers in the Complexation with Antisense Oligonucleotides and Cell Uptake. NANOSCALE RESEARCH LETTERS 2016; 11:66. [PMID: 26847692 PMCID: PMC4742457 DOI: 10.1186/s11671-016-1260-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Accepted: 01/09/2016] [Indexed: 06/05/2023]
Abstract
Poly(amidoamine) dendrimers are the most recognized class of dendrimer. Amino-terminated (PAMAM-NH2) and hydroxyl-terminated (PAMAM-OH) dendrimers of generation 4 are widely used, since they are commercially available. Both have different properties, mainly based on their different overall charges at physiological pH. Currently, an important function of dendrimers as carriers of short single-stranded DNA has been applied. These molecules, known as antisense oligonucleotides (asODNs), are able to inhibit the expression of a target mRNA. Whereas PAMAM-NH2 dendrimers have shown to be able to transfect plasmid DNA, PAMAM-OH dendrimers have not shown the same successful results. However, little is known about their interaction with shorter and more flexible molecules such as asODNs. Due to several initiatives, the use of these neutral dendrimers as a scaffold to introduce other functional groups has been proposed. Because of its low cytotoxicity, it is relevant to understand the molecular phenomena involving these types of dendrimers. In this work, we studied the behavior of an antisense oligonucleotide in presence of both types of dendrimers using molecular dynamics simulations, in order to elucidate if they are able to form stable complexes. In this manner, we demonstrated at atomic level that PAMAM-NH2, unlike PAMAM-OH, could form a well-compacted complex with asODN, albeit PAMAM-OH can also establish stable interactions with the oligonucleotide. The biological activity of asODN in complex with PAMAM-NH2 dendrimer was also shown. Finally, we revealed that in contact with PAMAM-OH, asODN remains outside the cells as TIRF microscopy results showed, due to its poor interaction with this dendrimer and cell membranes.
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Affiliation(s)
- Valeria Márquez-Miranda
- Facultad de Biología, Center for Bioinformatics and Integrative Biology (CBIB), Universidad Andres Bello, Republica 239, Santiago, Chile
- Fundación Fraunhofer Chile Research, M. Sánchez Fontecilla 310 piso 14, Las Condes, Chile
| | - Juan Pablo Peñaloza
- Facultad de Medicina, Center for Integrative Medicine and Innovative Science, Universidad Andres Bello, Santiago, Chile
| | - Ingrid Araya-Durán
- Facultad de Biología, Center for Bioinformatics and Integrative Biology (CBIB), Universidad Andres Bello, Republica 239, Santiago, Chile
- Fundación Fraunhofer Chile Research, M. Sánchez Fontecilla 310 piso 14, Las Condes, Chile
| | - Rodrigo Reyes
- Facultad de Medicina, Center for Integrative Medicine and Innovative Science, Universidad Andres Bello, Santiago, Chile
| | - Soledad Vidaurre
- Departamento Ciencias Químicas y Biológicas, Laboratorio de Bionanotecnología, Universidad Bernardo O'Higgins, Santiago, Chile
| | - Valentina Romero
- Departamento Ciencias Químicas y Biológicas, Laboratorio de Bionanotecnología, Universidad Bernardo O'Higgins, Santiago, Chile
| | - Juan Fuentes
- Facultad de Biología, Laboratorio de Microbiología, Universidad Andres Bello, Republica 217, Santiago, Chile
| | - Francisco Céric
- Laboratorio de Neurociencias Cognitivas, Facultad de Psicología, Universidad del Desarrollo, Santiago, Chile
| | - Luis Velásquez
- Fundación Fraunhofer Chile Research, M. Sánchez Fontecilla 310 piso 14, Las Condes, Chile
- Facultad de Medicina, Center for Integrative Medicine and Innovative Science, Universidad Andres Bello, Santiago, Chile
| | - Fernando D González-Nilo
- Facultad de Biología, Center for Bioinformatics and Integrative Biology (CBIB), Universidad Andres Bello, Republica 239, Santiago, Chile.
- Fundación Fraunhofer Chile Research, M. Sánchez Fontecilla 310 piso 14, Las Condes, Chile.
- Centro Interdisciplinario de Neurociencia de Valparaíso, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso, Chile.
| | - Carolina Otero
- Fundación Fraunhofer Chile Research, M. Sánchez Fontecilla 310 piso 14, Las Condes, Chile.
- Facultad de Medicina, Center for Integrative Medicine and Innovative Science, Universidad Andres Bello, Santiago, Chile.
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Starok M, Preira P, Vayssade M, Haupt K, Salomé L, Rossi C. EGFR Inhibition by Curcumin in Cancer Cells: A Dual Mode of Action. Biomacromolecules 2015; 16:1634-42. [PMID: 25893361 DOI: 10.1021/acs.biomac.5b00229] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Epidermal Growth Factor Receptor (EGFR) is an important target of anticancer therapy. Nowadays, the search for new molecules inhibiting this receptor is turning toward natural substances. One of the most promising natural compounds that have shown an anti-EGFR activity is curcumin, a polyphenol found in turmeric. Its effect on the receptor kinase activity and on the receptor autophosphorylation has been already described, but the mechanism of how curcumin interacts with EGFR is not fully elucidated. We demonstrate that the mode of action of curcumin is dual. This polyphenol is able to inhibit directly but partially the enzymatic activity of the EGFR intracellular domain. The present work shows that curcumin also influences the cell membrane environment of EGFR. Using biomimetic membrane models, we show that curcumin insertion into the lipid bilayer leads to its rigidification. Single particle tracking analyses performed in the membrane of A431 cancer cells confirmed that this effect of curcumin on the membrane slows down the receptor diffusion. This is likely to affect the receptor dimerization and, in turn, its activation.
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Affiliation(s)
- Marcelina Starok
- †Sorbonne Universités, Université de Technologie de Compiègne, CNRS, Laboratoire de Génie Enzymatique et Cellulaire, Rue Roger Couttolenc, CS 60319, F-60203 Compiègne Cedex, France
| | - Pascal Preira
- ‡CNRS; Institut de Pharmacologie et de Biologie Structurale, 205 route de Narbonne, F-31077 Toulouse, France.,§Université de Toulouse, UPS, IPBS, F-31077 Toulouse, France
| | - Muriel Vayssade
- ∥Sorbonne Universités, Université de Technologie de Compiègne, CNRS, Laboratoire de Biomécanique et Bioingénierie, Rue Roger Couttolenc, CS 60319, F-60203 Compiègne Cedex, France
| | - Karsten Haupt
- †Sorbonne Universités, Université de Technologie de Compiègne, CNRS, Laboratoire de Génie Enzymatique et Cellulaire, Rue Roger Couttolenc, CS 60319, F-60203 Compiègne Cedex, France
| | - Laurence Salomé
- ‡CNRS; Institut de Pharmacologie et de Biologie Structurale, 205 route de Narbonne, F-31077 Toulouse, France.,§Université de Toulouse, UPS, IPBS, F-31077 Toulouse, France
| | - Claire Rossi
- †Sorbonne Universités, Université de Technologie de Compiègne, CNRS, Laboratoire de Génie Enzymatique et Cellulaire, Rue Roger Couttolenc, CS 60319, F-60203 Compiègne Cedex, France
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