提供缺失的基因或缺陷基因的功能替代品有可能彻底改变当前的医疗保健。在病毒载体和合成载体这两种基因传递方法中,合成阳离子载体具有几个实际优势,但转染效率低下。描述了一种使用电荷反转两亲物进行基因传递的新方法。这种合成载体在细胞内从阳离子转化为阴离子两亲物。这种两亲物有两个作用:首先,它结合然后释放 DNA;第二,作为阴离子多电荷两亲物,它破坏脂质双层的稳定性。合成并充分表征了一种电荷反转两亲物,包括它与 DNA 形成的超分子复合物。
Functional synthetic molecules and macromolecules for gene delivery
申请人:Grinstaff W. Mark
公开号:US20060241071A1
公开(公告)日:2006-10-26
The present invention describes a synthetic non-viral vector composition for gene therapy and the use of such compositions for in vitro, ex vivo and/or in vivo transfer of genetic material. The invention proposes a pharmaceutical composition containing 1) a non-cationic amphiphilic molecule or macromolecule and its use for delivery of nucleic acids or 2) a cationic amphiphilic molecule or macromolecule that transforms from a cationic entity to an anionic, neutral, or zwitterionic entity by a chemical, photochemical, or biological reaction and its use for delivery of nucleic acids. Moreover this invention describes the use of these non-viral vector compositions in conjunction with a surface to mediate the delivery of nucleic acids. An additional embodiment is the formation of a hydrogel with these compositions and the use of this hydrogel for the delivery of genetic material. A further embodiment of this invention is the use of a change in ionic strength for the delivery of genetic material.
Synthesis, Characterization, and <i>In Vitro</i> Transfection Activity of Charge-Reversal Amphiphiles for DNA Delivery
作者:Xiao-Xiang Zhang、Carla A. H. Prata、Jason A. Berlin、Thomas J. McIntosh、Philippe Barthelemy、Mark W. Grinstaff
DOI:10.1021/bc1004526
日期:2011.4.20
in the hydrophobic chains of the lipids through the preparation of five newamphiphiles. The amphiphiles and corresponding lipoplexes were characterized by DSC, TEM, and X-ray, as well as evaluated for DNA binding and DNA transfection. For one specific charge-reversal lipid, stable lipoplexes of approximately 550 nm were formed, and with this amphiphile, effective in vitro DNA transfection activities
合成了一系列具有不同链长和末端功能的电荷反转脂质。这些脂质被设计成结合 DNA,然后根据与 DNA 的静电相互作用的变化释放 DNA。具体而言,可裂解的酯键位于烃链的末端。通过制备五种新的两亲物,通过改变脂类疏水链中酯键的长度和位置来调整从两亲物释放的 DNA。两亲物和相应的脂质复合物通过 DSC、TEM 和 X 射线进行表征,并评估 DNA 结合和 DNA 转染。对于一种特定的电荷反转脂质,形成了大约 550 nm 的稳定脂质复合物,并且使用这种两亲物,在体外有效 观察DNA转染活性。