Abstract:
A 6-O-sulfated N-acetylheparosan in which a primary hydroxyl group of N-acetylglucosamine constituting N-acetylheparosan is sulfated; a hematopoietic stem cell growth auxiliary agent, which has hematopoietic stem cell growth-accelerating activity and comprises the 6-O-sulfated-N-acetylheparosan as an active ingredient; a medium for a hematopoietic stem cell, which comprises the hematopoietic stem cell growth auxiliary agent and an other medium component necessary for culturing the hematopoietic stem cell; a method for culturing a hematopoietic stem cell, which comprises culturing the hematopoietic stem cell in the presence of the hematopoietic stem cell growth auxiliary agent or in the medium for a hematopoietic stem cell; and a method for treating a blood disease, which comprises transplanting a hematopoietic stem cell cultured by the above method to bone marrow of a mammal.
Abstract:
A hyaluronic acid derivative in which an anti-inflammatory drug is bound to hyaluronic acid through a covalent bond via a spacer having a biodegradable region, and a production process thereof.
Abstract:
A hyaluronic acid derivative in which an anti-inflammatory drug is bound to hyaluronic acid through a covalent bond via a spacer having a biodegradable region, and a production process thereof.
Abstract:
A drug-introduced photo-crosslinked hyaluronic acid derived gel which is a photo-crosslinked hyaluronic acid gel into which a drug is introduced through a covalent bond, and has characteristics that are capable of extruding from an injection device. The drug-introduced photo-cross-linked hyaluronic acid derived gel is capable of extruding, for example, by an injection needle of 20 to 25 gauge with a pressure of 0.5 to 5 kg/cm2.
Abstract:
A polysaccharide derivative having a high solubility in an aqueous solvent is produced. The production method of the present invention uses a compound shown by the general formula (1) as a condensing agent and allows a polysaccharide having a carboxyl group to react with an an organic compound having a functional group capable of condensing with the carboxyl group to prepare the polysaccharide derivative: R1 and R2 independently represent a substituent selected among alkyl groups of 1 to 4 carbon atoms and aryl groups of 6 to 8 carbon atoms; Z−represents a counter anion; and E+represents an organic group shown as: R3, R4, and R5 independently represent an organic group having at least one carbon atom directly bound to a quaternary nitrogen atom and any two or all of R3, R4, and R5 may link together to form a cyclic structure.
Abstract:
A drug-introduced photo-crosslinked hyaluronic acid derived gel which is a photo-crosslinked hyaluronic acid gel into which a drug is introduced through a covalent bond, and has characteristics that are capable of extruding from an injection device. The drug-introduced photo-cross-linked hyaluronic acid derived gel is capable of extruding, for example, by an injection needle of 20 to 25 gauge with a pressure of 0.5 to 5 kg/cm2.
Abstract:
A polysaccharide derivative having a high solubility in an aqueous solvent is produced. The production method of the present invention uses a compound shown by the general formula (1) as a condensing agent and allows a polysaccharide having a carboxyl group to react with an an organic compound having a functional group capable of condensing with the carboxyl group to prepare the polysaccharide derivative: R1 and R2 independently represent a substituent selected among alkyl groups of 1 to 4 carbon atoms and aryl groups of 6 to 8 carbon atoms; Z−represents a counter anion; and E+represents an organic group shown as: R3, R4, and R5 independently represent an organic group having at least one carbon atom directly bound to a quaternary nitrogen atom and any two or all of R3, R4, and R5 may link together to form a cyclic structure.
Abstract:
Oligosaccharides including those usable as anti-inflammatory agent or anti-allergy agent, represented by the following general formula (3): wherein R10 and R11 each independently represent a hydrogen atom or —SO3M where M represents a proton or a monovalent cation, Ac represents an acetyl group, R12 represents a hydrogen atom or an anomeric substituent (a 6-O-sulfated N-acetylglucosamine residue, an alkyl group, a glycerol residue, an O-alkylglycerol residue, a cholesterol residue, a cholestanyl group, a ceramide residue, a phospholipid residue, a biotin residue, or a peptide residue), and Z represents an oxygen atom or —NHCO—.