摘要:
An excellent nucleic acid delivery composition is provided which has reduced cytotoxicity and improved nucleic acid introduction efficiency and gene expression efficiency. The composition comprises: a block copolymer having an uncharged hydrophilic polymer segment and a cationic polymer segment; a cationic polymer; and a nucleic acid, wherein the mol percentage (B/H ratio) of the cationic groups of the block copolymer to the total cationic groups of the block copolymer and the cationic polymer is between 25% and 90%.
摘要:
An excellent nucleic acid delivery composition is provided which has reduced cytotoxicity and improved nucleic acid introduction efficiency and gene expression efficiency. The composition comprises: a block copolymer having an uncharged hydrophilic polymer segment and a cationic polymer segment; a cationic polymer; and a nucleic acid, wherein the mol percentage (B/H ratio) of the cationic groups of the block copolymer to the total cationic groups of the block copolymer and the cationic polymer is between 25% and 90%.
摘要:
The present invention provides a protein delivery means (e.g., a polyion complex) which allows efficient introduction into cells (particularly into the cytoplasm), is highly stable in serum, and is also widely applicable. The polyion complex of the present invention comprises a cationic polymer having a polycation moiety and a charge-conversional protein whose overall charge is converted from basic or neutral to acidic by a specific charge regulator.
摘要:
This invention provides a method to detect analyte which comprises preparing fine particles which have a chargeable group in their core and a hydrophilic polymer chain in their shell; obtaining an agglutinated matter by forming a biologically specific bond between a specific residue on the surface of fine particles and analyte, and by simultaneously forming a bond by the electrostatic interaction between impure protein and said particles; and subsequently cleaving only the latter bond by raising ionic intensity. Thus, this invention provides a method to detect analyte with rapidity and high sensitivity with use of agglutination reaction.
摘要:
Fine particles of crystalline polyol are provided having a cationic polymer fixed on the crystal surfaces. These fine particles can stably carry an anionically charged compound on their surfaces.
摘要:
The present invention provides an efficient delivery system for a nucleic acid, more specifically, a cationic poly(amino acid) that has a side chain having a plurality of different amine functional groups in a moiety including a cationic group and that has a hydrophobic group introduced into part of the side chain, and a polyion complex (PIC) of the poly(amino acid) and an oligo- or polynucleotide.
摘要:
The present invention provides a protein delivery means (e.g., a polyion complex) which allows efficient introduction into cells (particularly into the cytoplasm), is highly stable in serum, and is also widely applicable. The polyion complex of the present invention comprises a cationic polymer having a polycation moiety and a charge-conversional protein whose overall charge is converted from basic or neutral to acidic by a specific charge regulator.
摘要:
A crosslinked polymer or polymer fine particles which can be obtained through copolymerization of at least a macromonomer having a polyethylene glycol segment, a comonomer having tertiary amine groups in its side chains and a crosslinking agent are provided. Said crosslinked polymer can be provided in the form of polymer nano- or micro- spheres; and also as conjugate nano- or micro-spheres with their core parts fixing or encapsulating metal or semiconductor ultrafine particles.
摘要:
The invention provides high sensitivity bioassay sensor systems in which non-specific adsorption of impurities such as, for example, proteins, in biological samples is inhibited. Polyethylene glycolated particles enclosing metal or semi-conductor which is in common with the sensor material are used for amplification.
摘要:
Disclosed are a sugar-responsive gel and a medicine administering device having a pKa more suitable for use in a body environment and capable of administering medicine more autonomously than before. A sugar-responsive gel and an insulin administering device having a pKa more suitable for use in a body environment and capable of administering insulin more autonomously than before, wherein under a body condition of pKa of 7.4 or less and temperature of 35° C.-40° C., when the glucose concentration increases, insulin can be released from a gel body in response thereto, and when the glucose concentration decreases, insulin release from the gel body can be suppressed.