Phosphonolipids as non-viral vectors for gene therapy
摘要:
Several phosphonates with two fatty chains and different polar heads were synthesized and evaluated for their potential to transfer DNA into epithelial (COS-7) and hematopoietic (K562) cell lines, and compared to commercially available references. In both cases, ammonium-phosphonates were particularly efficient. (C) Elsevier, Paris.
The present invention provides phosphonate conjugates and methods of preparing the phosphonate conjugates so as to allow, for example, improved methods and compounds for modifying the surface of a nanoparticle to increase in vivo circulation times and targeted delivery performance.
Methods for the preparation of various 1-hydroxy-1,1-bisphosphonate partial esters were developed. They were obtained from (alkyl or phenyl) bis(trimethylsilyl) phosphite and aromatic or aliphatic acid chlorides, followed by methanolysis.
clickable liposomes that react with amines. The kinetics of this metal free phosphonodithioester-amine coupling (PAC) on liposomes in water is reported and can be classified as a fast reaction with a second order rate constant of k ≈ 8 × 102 M−1 s−1. The PAC reaction represents a versatile strategy to functionalize liposomes.
在磷脂配方中加入亲脂性膦二硫酯会产生可与胺反应的可点击脂质体。报道了水中脂质体上的这种无金属膦二硫酯-胺偶联(PAC)的动力学,并且可以将其归类为二阶速率常数k ≈ 8 × 10 2 M -1 s -1的快速反应。 PAC 反应代表了脂质体功能化的通用策略。
Novel lipophilic compounds and uses thereof
申请人:Des Abbayes Harve
公开号:US20060165768A1
公开(公告)日:2006-07-27
The present invention has for an object a cationic lipophilic compound of the following general formula (I):
wherein:
a) R
1
and R′
1
each represent, independently from one another, an alkyl chain, an alkenyl chain or a polyalkenyl chain with from 10 to 24 carbon atoms, with the polyalkenyl chain having from 2 to 4 double links;
b) R
2
is a hydrogen atom or an alkyl chain having from 1 to 4 carbon atoms; and
R
3
is a group with the following formula (IIa) —(CH
2
)
n
— or following formula (IIb) —C(═NH)—NH—(CH
2
)
n
— wherein: n is an integer equal to 0, 1, 2, 3 or 4; and
d) A
+
is an organic cation;
e) X
−
is an anion.
PREPARATION METHOD OF NANOCRYSTALS COATED WITH METAL-SURFACTANT LAYERS
申请人:Jang Eun Joo
公开号:US20100159249A1
公开(公告)日:2010-06-24
A method for preparing nanocrystals is disclosed. The method includes synthesizing colloidal semiconductor nanocrystal cores, and adding a metal salt to the colloidal semiconductor nanocrystal cores and heating the mixture while maintaining the reaction temperature constant. During the reaction, the surfaces of the semiconductor nanocrystal cores are etched (‘in-situ etching’) and metal-surfactant layers are formed on the etched surface portions of the semiconductor nanocrystal cores. The metal-surfactant layers are derived from the metal salt. Nanocrystals prepared by the method have minimal surface defects and exhibit high luminescence efficiency and good stability.