Isolation of γ-oryzanol through calcium ion induced precipitation of anionic micellar aggregates

A simple method for the isolation of γ-oryzanol from rice bran acid oil has been developed. The basis of the present isolation protocol is calcium ion induced precipitation of anionic micellar aggregates. Rice bran acid oil, a byproduct of rice bran oil processing industries, is subjected to conventional vacuum distillation to remove free fatty acids. Aqueous alkaline hydrolysis of the resultant residue, upon dilution with water, produces anionic micellar aggregates containing solubilized γ-oryzanol. Addition of calcium ions to this aqueous micellar aggregate induces instant coprecipitation of the calcium salts of the fatty acids and the aggregate-associated γ-oryzanol. The dried precipitate is extracted with ethyl acetate. Ethyl acetate is evaporated from the extract, and γ-oryzanol is purified from the residue by silica gel column chromatography. Experimental details for the isolation and characterization procedure are described. The present method will give ready access to the physiologically beneficial and value-added pharmaceutical product γ-oryzanol

Novel non-glycerol-based cytofectins with lactic acid-derived head groups

We report herein the design, synthesis, and transfection biology of a novel series of non-glycerol-based cationic lipids with lactic acid-derived head groups The synthetic procedure adopted herein for preparing 1-hydroxy-prop-2-yl head-group-based monocationic transfection lipids 1-7 is fairly straightforward and potentially applicable in designing other cationic lipids with lactic acid-derived head groups. A striking anchor-length dependency was observed in NIH3T3 cells in the sense that except lipid 4, all the other lipids were essentially transfection-inefficient. Ethidium bromide assay for the lipid:DNA interactions is consistent with the general observation that significant lipid:DNA interactions do not guarantee on improved transfection efficiency cationic lipid mediated gene delivery. Given its remarkable transfection properties and low cellular toxicity, lipid 4 is likely to find future use in the area of liposomal gene delivery