A DNA−Lipid Complex in Organic Media and Formation of an Aligned Cast Film1
摘要:
A novel DNA-lipid complex,is prepared by replacing sodium counter cations by cationic amphiphilic lipids (1). The DNA-lipid complex is insoluble in aqueous solutions, but is soluble in most organic media such as benzene, ethanol, and chloroform. The DNA-lipid complex was confirmed to form double helical strands even in organic media, and the internal conformation of DNA strands could be reversibly changed from B-form to C-form in the organic solution (CHCl3/EtOH = 4:1) by changing the water content. A self-standing, water-insoluble DNA-lipid (1) film was prepared by casting from the organic solution and could be stretched to produce oriented DNA strands with their axes aligned along the stretching direction. The film can be impregnated with the drug ethidium. bromide in the aqueous solution. The linear dichroism characteristics of the drug-DNA film show that the DNA strands are well oriented and the ethidium molecules are intercalated, as they are in normal aqueous solutions.
New polyol ether compounds and a process for their preparation. The process comprises reacting a polyol, a carbonyl compound, and hydrogen in the presence of hydrogenation catalyst, to provide the polyol ether. The molar ratio of polyol to carbonyl compound in the process is greater than 5:1.
This invention provides new therapeutic peptides, i.e. new protracted Exendin-4 compounds, pharmaceutical compositions and the use of such.
本发明提供了新的治疗性肽,即新的长效Exendin-4化合物、药物组合物及其用途。
Long-Acting Y2 and/or Y4 Receptor Agonists
申请人:Østergaard Søren
公开号:US20110275559A1
公开(公告)日:2011-11-10
The present invention relates to a PYY or PP peptide derivative or analogue thereof derivatised with one or more serum albumin binding side chains comprising a dis-tal tetrazole or carboxylic acid group. Moreover, the invention relates to compositions hereof and methods of treatment of conditions responsive to Y receptor modulation.
chain length and increasing the number of the oligooxyethyl fragment. The critical micelle concentration had a monotonous decreasing trend with increasing the alkyl chain length. Nonyl di-/tri-/tetraoxyethyl β-d-xylopyranosides [−(OCH2CH2)m–, where m = 2, 3, and 4] exhibited the most excellent foaming ability and foam stability. In the n-octane/water system, dodecyl tetraoxyethyl β-d-xylopyranosides and
Described herein are nanoparticles that are coated with a bilayer of molecules formed from surface binding molecules and amphiphatic molecules. The bilayer coating self assembles on the nanoparticles from readily available materials/molecules. The modular design of the bilayer coated nanoparticles provides a means for readily and efficiently optimizing the properties of the bilayer coated nanoparticle compositions. Also described herein are uses of such nanoparticles in medicine, laboratory techniques, industrial and commerical applications.