Polysaccharide-polyamine copolymer and use thereof in reducing low density lipolipoprotein (ldl) concentration in plasma

A pharmaceutical composition for treatments of hypercholesterolemia, the pharmaceutical composition comprises an amino-polysaccharide copolymer and a pharmaceutically acceptable salt thereof as an active ingredient, the amino-polysaccharide copolymer is a copolymerization product of the following two parts:

• a selectively oxidized polysaccharide having a 2,3-dialdehyde moiety, and a amino polymer which provides an amino functionality;
• the amino polymer cross linking the selectively oxidized polysaccharide having a 2,3-dialdehyde moiety to form a net-like structure and finally to provide a hydrogel having an amino functionality or a particulate amino-polysaccharide copolymer, amino functionalities of the hydrogel having an amino functionality or the particulate amino-polysaccharide copolymer can be protonated to form a cationic copolymer having three dimensional network structure and protonation sites, a nitrogen content of the cationic copolymer or the amino-polysaccharide copolymer is at least 12.3% weight percent, or at least 15% weight percent, or at least 22% weight percent, or at least 40% weight percent, the cationic copolymer and the amino-polysaccharide copolymer are both insoluble in water.

A use of a pharmaceutical composition comprising an amino-polysaccharide copolymer and a pharmaceutically acceptable salt thereof as an active ingredient in the preparation of a medicament for the treatment of hypercholesterolemia, wherein, the amino-polysaccharide copolymer is a copolymerization product of the following two parts:

• a selectively oxidized polysaccharide having a 2,3-dialdehyde moiety, and a amino polymer which provides an amino functionality;
• the amino polymer cross linking the selectively oxidized polysaccharide having a 2,3-dialdehyde moiety to form a net-like structure and finally to provide a hydrogel having an amino functionality or a particulate amino-polysaccharide copolymer, amino functionalities of the hydrogel having an amino functionality or the particulate amino-polysaccharide copolymer can be protonated to form a cationic copolymer having three dimensional network structure and protonation sites, a nitrogen content of the cationic copolymer or the amino-polysaccharide copolymer is at least 12.3% weight percent, or at least 15% weight percent, or at least 22% weight percent, or at least 40% weight percent, the cationic copolymer and the amino-polysaccharide copolymer are both insoluble in water.