The key role of the scaffold on the efficiency of dendrimer nanodrugs

Nat Commun. 2015 Jul 14;6:7722. doi: 10.1038/ncomms8722.

Abstract

Dendrimers are well-defined macromolecules whose highly branched structure is reminiscent of many natural structures, such as trees, dendritic cells, neurons or the networks of kidneys and lungs. Nature has privileged such branched structures for increasing the efficiency of exchanges with the external medium; thus, the whole structure is of pivotal importance for these natural networks. On the contrary, it is generally believed that the properties of dendrimers are essentially related to their terminal groups, and that the internal structure plays the minor role of an 'innocent' scaffold. Here we show that such an assertion is misleading, using convergent information from biological data (human monocytes activation) and all-atom molecular dynamics simulations on seven families of dendrimers (13 compounds) that we have synthesized, possessing identical terminal groups, but different internal structures. This work demonstrates that the scaffold of nanodrugs strongly influences their properties, somewhat reminiscent of the backbone of proteins.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aza Compounds / chemistry
  • Aza Compounds / pharmacology
  • Biocompatible Materials / chemistry
  • Biocompatible Materials / pharmacology
  • Bone Density Conservation Agents / chemistry
  • Bone Density Conservation Agents / pharmacology
  • Dendrimers / chemistry*
  • Dendrimers / pharmacology
  • Diphosphonates / chemistry
  • Diphosphonates / pharmacology
  • Flow Cytometry
  • Humans
  • Molecular Dynamics Simulation
  • Molecular Structure
  • Monocytes / drug effects*
  • Nanoparticles / chemistry*
  • Polylysine / chemistry
  • Polylysine / pharmacology
  • Polypropylenes / chemistry
  • Polypropylenes / pharmacology
  • Silanes / chemistry
  • Silanes / pharmacology

Substances

  • Aza Compounds
  • Biocompatible Materials
  • Bone Density Conservation Agents
  • Dendrimers
  • Diphosphonates
  • PAMAM Starburst
  • Polypropylenes
  • Silanes
  • carbosilane
  • poly(propyleneimine)
  • Polylysine