Materials and Complexes for the Delivery of Biologically-Active Materials to Cells
申请人:Hart Stephen Lewis
公开号:US20100184831A1
公开(公告)日:2010-07-22
The invention provides a peptide derivative of formula A-B-C wherein A is a polycationic nucleic acid-binding component; B is a spacer element peptide that is susceptible to cleavage within a cell; and C is a cell surface receptor binding component. The invention also provides a lipid derivative of general formula (I): (PEG)
q
-Linker-Spacer-Cationic headgroup-carbon skeleton-(hydrophobic chain)
o
wherein: the Linker is a group susceptible to cleavage within a cell; the Spacer is a group linking the Linker to the Cationic headgroup; q denotes the number of PEG chains and q=1, 2 or 3; o denotes the number of hydrophobic chains and o=1, 2 or 3; the carbon skeleton is a group linking the hydrophobic chains to the cationic headgroup. The peptide and lipid derivatives find use in non-viral gene delivery systems.
Materials and complexes for the delivery of biologically-active materials to cells
申请人:Hart Stephen Lewis
公开号:US09399016B2
公开(公告)日:2016-07-26
The invention provides a peptide derivative of formula A-B-C wherein
A is a polycationic nucleic acid-binding component;
B is a spacer element peptide that is susceptible to cleavage within a cell; and
C is a cell surface receptor binding component.
The invention also provides a lipid derivative of general formula (I):
(PEG)q-Linker-Spacer-Cationic headgroup-carbon skeleton-(hydrophobic chain)o
wherein:
the Linker is a group susceptible to cleavage within a cell;
the Spacer is a group linking the Linker to the Cationic headgroup;
q denotes the number of PEG chains and q=1, 2 or 3;
o denotes the number of hydrophobic chains and o=1, 2 or 3;
the carbon skeleton is a group linking the hydrophobic chains to the cationic headgroup.
The peptide and lipid derivatives find use in non-viral gene delivery systems.
The discovery and enhanced properties of trichain lipids in lipopolyplex gene delivery systems
作者:Atefeh Mohammadi、Laila Kudsiova、M. Firouz Mohd Mustapa、Frederick Campbell、Danielle Vlaho、Katharina Welser、Harriet Story、Aristides D. Tagalakis、Stephen L. Hart、David J. Barlow、Alethea B. Tabor、M. Jayne Lawrence、Helen C. Hailes
DOI:10.1039/c8ob02374c
日期:——
this concept can be more generally applied to improve gene delivery efficiencies, the design and synthesis of a series of novel TC cationic lipids and the corresponding DC lipids was undertaken. Transfectionefficacies of the LPDs were found to be higher when using the TC lipids compared to the DC analogues, so experiments were carried out to investigate the reasons for this enhancement. Sizing experiments
当具有末端羟基的阳离子脂质和辅助脂质二油酰基L形成时,发现了一种新型三链 (TC) 脂质-α-磷脂酰乙醇胺 (DOPE) 被配制成囊泡并储存。重要的是,发现由 TC 脂质、靶向肽和 DNA (LPD) 组成的脂多聚复合物的转染效率高于使用相应的双链 (DC) 脂质时的转染效率。为了探索这一有趣的发现并确定这一概念是否可以更普遍地应用于提高基因传递效率,进行了一系列新型 TC 阳离子脂质和相应的 DC 脂质的设计和合成。与 DC 类似物相比,使用 TC 脂质时发现 LPD 的转染效率更高,因此进行了实验以研究这种增强的原因。尺寸实验和透射电子显微镜表明,使用 TC 和 DC 脂质制备的 LPD 的大小和形状没有重大差异,而圆二色光谱表明第三个酰基链的存在不影响 DNA 的构象在 LPD 内。相比之下,小角中子散射研究表明,在配制为 LPD 时,脂质构象发生了相当大的重新排列,尤其是 TC 脂质,而凝胶电泳研究表明,在