Substituent Effects on the pH Sensitivity of Acetals and Ketals and Their Correlation with Encapsulation Stability in Polymeric Nanogels
作者:Bin Liu、S. Thayumanavan
DOI:10.1021/jacs.6b11181
日期:2017.2.15
that the ρ value for the hydrolysis of benzylideneacetals is about -4.06, which is comparable to an SN1-like process. This shows that there is a strong, developing positive charge at the benzylic position in the transition state during the degradation of acetals. This positively charged transition state is consistent with the relative degradation rates of acetals vs ketals (correlated to stabilities
New polymer supports containing cleavable cross-links are described which are suitable for solid phase peptide synthesis and can then be solublized for further chemical or biological manipulation (including immunization) in solution.
Polycations often suffer from the irreconcilable inconsistency between transfection efficiency and toxicity. Polymers with high molecularweight (MW) and cationic charge feature potent genedelivery capabilities, while in the meantime suffer from strong chemotoxicity, restricted intracellular DNA release, and lowstability in vivo. To address these critical challenges, we herein developed pH-responsive
[EN] RELEASABLE CATIONIC LIPIDS FOR NUCLEIC ACIDS DELIVERY SYSTEMS<br/>[FR] LIPIDES CATIONIQUES LIBÉRABLES POUR SYSTÈMES D'ADMINISTRATION D'ACIDES NUCLÉIQUES
申请人:ENZON PHARMACEUTICALS INC
公开号:WO2010057155A1
公开(公告)日:2010-05-20
The present invention is directed to releasable cationic lipids and nanoparticle compositions for the delivery of nucleic acids and methods of modulating an expression of a target gene using the same. In particular, the invention relates to cationic lipids including an acid labile linker, and nanoparticle compositions containing the same.
Acid Degradable and Biocompatible Polymeric Nanoparticles for the Potential Codelivery of Therapeutic Agents
作者:Hien T. T. Duong、Christopher P. Marquis、Michael Whittaker、Thomas P. Davis、Cyrille Boyer
DOI:10.1021/ma201085z
日期:2011.10.25
The synthesis of well-defined functional nanoparticles for the encapsulation of hydrophobic and hydrophilic drugs is described. Nanoparticles were built from amphiphilic copolymers consisting of P(OEG-A) homopolymers chain extended with vinyl benzyl chloride (VBC) and pentafluorophenyl acrylate (PFP-A) comonomers. Subsequently, the pendant chlorine atoms, introduced into the chains by VBC units, were