Abstract:
:Small interfering RNA (siRNA) constitutes an excellent way of knocking down genes. However, it requires the use of delivery systems to reach the target cells, especially to neuronal cells. Dendrimers are one of the most widely used synthetic nanocarriers for siRNA delivery. However, due to the complexity of the dendrimer-siRNA interactions, when a new dendritic carrier is designed it is difficult to predict its efficiency to bind and to deliver siRNA. At the same time it is not easy to understand the origin of eventual limited functionalities. We have modeled the interactions between two dendrimers (TDG-G1 and TDG-G2) and siRNA using molecular dynamics (MD) simulation. The results were compared to experimental physico-chemical parameters such as siRNA complexation, complex stability, size, and zeta potentials and biological effects such as down-regulation of a specific RNA expression in cortical neurons in culture. Data indicate that the combination of rigid core and flexible branches guarantees strong siRNA binding, which is important to have a good transfection profile. However, the successful nanocarrier for siRNA delivery (TDG-G1) is identified not only by a high affinity for siRNA, but by a favorable equilibrium between a strong binding and the ability to release siRNA to exert its biological action. The conditions under which the dendriplex is formed are also relevant for transfection efficiency and biological activity.
journal_name
Curr Med Chemjournal_title
Current medicinal chemistryauthors
Pavan GM,Monteagudo S,Guerra J,Carrión B,Ocaña V,Rodríguez-Lopez J,Danani A,Pérez-Martínez FC,Ceña Vdoi
10.2174/0929867311209024929subject
Has Abstractpub_date
2012-01-01 00:00:00pages
4929-41issue
29eissn
0929-8673issn
1875-533Xpii
CMC-EPUB-20120903-22journal_volume
19pub_type
杂志文章abstract::In recent years several mutations and sequence polymorphisms of the glucocorticoid receptor gene have been described. The majority of mutations have been found in patients with a rare endocrinological abnormality, the glucocorticoid resistance syndrome. In addition, some sequence polymorphisms have been considered to ...
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abstract:BACKGROUND:Neuronal α4β2 nAChRs are receptors involved in the role of neurotransmitters regulation and release, and this ionic channel participates in biological process of memory, learning and attention. This work aims to review the structure and functioning of the α4β2 nAChR emphasizing its role in the treatment of a...
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abstract::More than five decades since the Discovery of Penicillin, the chemistry and biological activity of b-lactams continue to attract the wide spread attention of research workers. Owing to high efficacy and extremely safe toxicological profile, they are agents of choice in the current therapeutic index for the bacterial i...
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abstract:BACKGROUND:Chronic Liver Disorders (CLD), caused by the lifestyle patterns like alcoholism or by non-alcoholic fatty liver disease or because of virus-mediated hepatitis, affect a large population fraction across the world. CLD progresses into end-stage diseases with a high mortality rate. Liver transplant is the only ...
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