摘要:
The present invention provides processes for the synthesis of novel Shikimic acid head-group containing non-toxic cationic amphiphiles capable of facilitating transport of biological macromolecules into cells.
摘要:
The present invention discloses novel cationic amphiphiles containing mannose-mimicking shikimic and quinic acid head-groups and a process for preparing cationic amphiphiles with mannose-mimicking polar head-groups such as, shikimic and quinic acids. The findings described herein also demonstrate that compounds of the present invention can target model DNA vaccines to antigen presenting cells (APCs) such as macrophages and dendritic cells (DCs), via mannose receptors expressed on the cell surface of APCs. The cationic amphiphiles disclosed herein show enhanced cellular and humoral immune response compared to their mannosyl counterpart in dendritic cell (DC, the most professional APC) based genetic immunization in mice. Cationic amphiphiles with mannose-mimicking quinic and shikic acid head-groups described in the present invention are likely to find future applications in the field of genetic immunization.
摘要:
Novel anti-cancer reagents capable of combating various types of tumors continue to be major research focus in many leading pharmaceutical companies round the globe. To this end, the present invention discloses processes for preparing a novel series of histidinylated cationic amphiphiles of formula I. The findings described herein also demonstrate that compounds of the present invention possess anti-proliferative activity such as anti" cancer activity and are useful in combating various types of cancer. The pharmaceutically active composition of cationic amphiphiles disclosed herein show enhanced cellular apoptosis through the Bax & Bcl-2 mediated signal transduction pathway. Cationic amphiphiles with histidine head-groups described in the present invention are likely to find future applications in the field of anti-cancer therapy.
摘要:
Liposomal compositions comprising of liposomes of guanidinylated cationic amphiphiles as the main lipid and cholesterol/1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC)/aminopropyl polyethyleneglycol carbamyl-distearoylphosphatidyl-ethanolamine (DSPE-peg-NH2) as co-lipids are described. These liposomal compositions containing encapsulated or electrostatically complexed therapeutic small interfering RNAs (siRNAs) against Cdc20, a key cell cycle regulator, inhibit solid tumor growth and melanoma tumor growth on lung in C57BL/6J mice.
摘要:
The present invention relates to the mannose - receptor selective lysinylated cationic amphiphile and a process for preparation thereof. The compounds of the present invention can target DNA vaccines to antigen presenting cells (APCs) such as macrophages and dendritic cells (DCs), via mannose receptors expressed on the cell surface of APCs. The cationic amphiphiles disclosed herein show enhanced cellular and humoral immune response compared to their mannosyl counterparts in genetic immunization in mice. The present invention discloses that immunization with electrostatic complexes (lipoplexes) of DNA vaccines encoding melanoma antigens (gp100 and tyrosinase) and liposome of the presently described novel lysinylated cationic amphiphiles with mannose-mimicking shikimoyl head-groups provides long-lasting (100 days post melanoma tumor challenge) protective immunity in all immunized mice. Cationic amphiphiles with mannose-mimicking shikimoyl head-groups described in the present invention are likely to find future applications in the field of genetic immunization.
摘要:
The present invention provides method and pharmaceutical composition for efficient delivery of siRNA (small interfering ribonucleic acids) into cultured mammalian cells. In addition, the present invention provides methods and compositions for knocking down the expression of a specific target gene by treating cells with the formulations comprising cationic amphiphile, a neutral colipid and a small RNA molecule. We demonstrate that our method delivers siRNA efficaciously into animal cells for the purpose of RNA interference. The area of medical science that is likely to benefit most from the present invention is RNAi therapeutics.
摘要:
The present invention provides a novel series of glycomimicking cationic amphiphiles containing quinic acid head-groups and methods for preparing the said cationic amphiphiles. The invention provides novel compositions containing the said amphiphiles with remarkable gene transfer properties. Furthermore, the present invention provides methods for producing immune response in mice using the above-mentioned formulations containing the said cationic amphiphiles and genetic materials encoding immunogenic antigens. The area of medical science that is likely to benefit most from the present invention is genetic immunization.