Novel chemoenzymatic methodology for the regioselective glycine loading on polyhydroxy compounds
作者:Shashwat Malhotra、Marcelo Calderón、Ashok K. Prasad、Virinder S. Parmar、Rainer Haag
DOI:10.1039/b927021c
日期:——
In the present work, we have developed a highly efficient temperature-dependent chemo-enzymatic methodology for the regioselective synthesis of novel esters of glycerol, G1 tri-glycerol dendrons and related esters for the first time using 4-nitrophenyl 2-(tert-butoxycarbonyl)acetate (Boc-gly-Ph-pNO2) (2) as the acylating agent. This methodology offers efficient and controlled loading of amino acid (glycine) on polyhydroxy compounds.
Method for Preparing Nanoparticles Based on Functional Amphiphilic Molecules or Macromolecules, and the Use Thereof
申请人:Barthelemy Philippe
公开号:US20110059180A1
公开(公告)日:2011-03-10
The invention relates to a method for preparing nanoparticles based on functional amphiphilic molecules or macromolecules, optionally in the presence of at least one colipide, enabling the encapsulation of therapeutic agents, especially anti-tumoral agents, and the use thereof for the transport and vectorisation of therapeutic agents, especially anti-tumoral agents.
Glycine-Terminated Dendritic Amphiphiles for Nonviral Gene Delivery
作者:Shashwat Malhotra、Hannah Bauer、Ariane Tschiche、Anna Maria Staedtler、Andreas Mohr、Marcelo Calderón、Virinder S. Parmar、Lena Hoeke、Soroush Sharbati、Ralf Einspanier、Rainer Haag
DOI:10.1021/bm300892v
日期:2012.10.8
successful application of gene therapy through siRNA/DNA transfection of cells is still a great challenge in current research.(1, 2) In the present study, we have developed multivalent polyglyceroldendron based amphiphiles with well-defined molecular structures that express controlled glycine arrays on their surfaces. The structure–activity relationships with respect to the siRNA complexation, toxicity
通过细胞的siRNA / DNA转染成功开发用于基因治疗的非病毒载体仍然是当前研究中的巨大挑战。(1,2)在本研究中,我们开发了基于多价聚甘油树突的两亲物,其分子定义明确在其表面表达受控甘氨酸阵列的结构。利用合成的两亲性聚阳离子研究了与siRNA络合,毒性和转染特性有关的构效关系。我们的发现表明,第二代两亲树状聚合物(G2-octaamine,4)的表面具有8个胺基,树突的核心具有疏水性C-18烷基链,可通过研究HeLa细胞中的萤光素酶和GAPDH基因活性的敲低,作为有效的载体来递送siRNA并实现有效的基因沉默。有趣的是,即使在较高的N / P 100比率下,两亲载体也无毒。据我们所知,这是使用树状两亲物成功进行siRNA转染的第一个实例。我们相信,这种超分子复合物可以作为非病毒siRNA递送系统的新有希望的替代品,并且将来将进行体内siRNA递送的研究。
FUNCTIONAL AMPHIPILIC MOLECULE OR MACROMOLECULE FORMULATIONS WITH MULTIPLE COMPARTMENTS
申请人:Barthelemy Philippe
公开号:US20120070505A1
公开(公告)日:2012-03-22
The invention relates to novel functional amphiphilic molecule or macromolecule formulations with multiple compartments for transporting or targeting at least one therapeutic agent, in particular an antitumor agent, as well as to a method for preparing such formulations and to the use thereof.
EFFICIENT METHODS FOR Z- OR CIS-SELECTIVE CROSS-METATHESIS
申请人:Hoveyda Amir H.
公开号:US20110245477A1
公开(公告)日:2011-10-06
The present invention generally relates to methods for performing metathesis reactions, including cross-metathesis reactions. Methods described herein exhibit enhanced activity and stereoselectivity, relative to known methods, and are useful in the synthesis of a large assortment of biologically and therapeutically significant agents.