Abstract: The present invention provides a composition that controls pharmacokinetics. Specifically, the present invention provides: a composition for controlling pharmacokinetics, the composition containing a polyvalent cation as an active ingredient; and a method for controlling pharmacokinetics using the polyvalent cation.

Abstract: A method of administering a nanoparticle to a subject including: administering to the subject an effective amount of an antibody that binds to an antigen expressed on a surface of a brain endothelial cell such that a sufficient amount of the antibody can bind to the surface of the brain endothelial cell, where the antibody is conjugated to a 1st molecule. Then administering to the subject a nanoparticle that is coated with a 2nd molecule that binds to the 1st molecule under a physiological condition in a brain blood vessel such that the nanoparticle can bind to the 1st molecule that has attached to the surface of the brain endothelial cell.

Abstract: The present invention provides a functionalized mRNA including mRNA and double-stranded RNA including at least one RNA oligomer hybridized with mRNA. Functionalized mRNA is provided according to this configuration.

Abstract: A complex is provided comprising a conjugate in which a polymer having a boronic acid group and a compound having a diol structure are bonded, and a substance that is complexed with the conjugate.

Abstract: The present invention provides a functionalized mRNA including mRNA and double-stranded RNA including at least one RNA oligomer hybridized with mRNA. Functionalized mRNA is provided according to this configuration.

Abstract: A unit-type polyion complex for use in delivering nucleic acid to a target site in a patient includes one or more molecules of a block copolymer having a poly(ethylene glycol) segment and a cationic poly(amino acid) segment and one or more molecules of a nucleic acid. A total quantity of positive charges derived from side chains of the cationic poly(amino acid) segment of the block copolymer in the unit-type polyion complex is not offset by a total quantity of negative charges derived from the nucleic acid. Furthermore, the nucleic acid has a strand length of 10-50 bases, the molecular weight of the poly(ethylene glycol) segment is 40×103 or more, and the block copolymer has a binding constant (Ka) for the nucleic acid of 3.0×105 or more.

Abstract: The present invention provides a polyion complex micelle including an antisense oligonucleotide and a block copolymer of a cationic polymer and a PEG block having a number average molecular weight of 3 kDa to 10 kDa.

Abstract: A pharmaceutical composition includes polymer units ? and ?, each having a hydrophilic polymer chain bound to a cationic polymer chain, and a drug. The polymer units ? and ? are radially arranged such that the cationic polymer chains are directed inward and the hydrophilic polymer chains are directed outward, thereby forming a micelle with the drug encapsulated in the micelle. The cationic polymer chain of the polymer unit ? has a phenylboronic acid group in a side chain, and the cationic polymer chain of the polymer unit ? has a phenylboronic acid binding site in a side chain. The phenylboronic acid group and the phenylboronic acid binding site form a cross-linked structure that can dissociate in an acidic environment and/or in the presence of a substance capable of competitive binding.

Abstract: A pharmaceutical composition includes polymer units ? and ?, each having a hydrophilic polymer chain bound to a cationic polymer chain, and a drug. The polymer units ? and ? are radially arranged such that the cationic polymer chains are directed inward and the hydrophilic polymer chains are directed outward, thereby forming a micelle with the drug encapsulated in the micelle. The cationic polymer chain of the polymer unit ? has a phenylboronic acid group in a side chain, and the cationic polymer chain of the polymer unit ? has a phenylboronic acid binding site in a side chain. The phenylboronic acid group and the phenylboronic acid binding site form a cross-linked structure that can dissociate in an acidic environment and/or in the presence of a substance capable of competitive binding.

Abstract: The present invention provides a composition that controls pharmacokinetics. Specifically, the present invention provides: a composition for controlling pharmacokinetics, the composition containing a polyvalent cation as an active ingredient; and a method for controlling pharmacokinetics using the polyvalent cation.

Abstract: A complex of mRNA encoding a target gene with RNA oligomers, wherein the RNA oligomers are at least two kinds of RNA oligomers comprising RNA sequences of (a) or (b), the at least two kinds of RNA oligomers are hybridizable respectively with sequences, said sequences being different from each other, in the mRNA sequence, and the complex is formed when a first sequence of the RNA oligomers hybridizes with different mRNA from the second sequence of the RNA oligomers: (a) an RNA sequence which comprises a first sequence consisting of 12-40 bases and being complementary to the mRNA sequence, a linker sequence consisting of 0-100 bases and a sequence which is the same as the first sequence, in this order; and (b) an RNA sequence which comprises a first sequence, which has a 90% or more identity with a sequence consisting of 12-40 bases and being complementary to the mRNA sequence and is hybridizable with mRNA, a linker sequence consisting of 0-100 bases and a second sequence which is the same as the first sequence

Abstract: The present invention provides a functionalized mRNA including mRNA and double-stranded RNA including at least one RNA oligomer hybridized with mRNA. Functionalized mRNA is provided according to this configuration.

Abstract: Provided is a polymer including a repeating unit (I) represented by Formula (I) and a repeating unit (II) represented by Formula (II) (in the formulae, m represents 1 or 2, L represents a divalent aromatic hydrocarbon group or a divalent aliphatic hydrocarbon group, R1 represents a hydrogen atom, an aliphatic hydrocarbon group, or an aromatic hydrocarbon group, X represents ORx, SRx, or NRx1Rx2, Rx represents a hydrogen atom, an aliphatic hydrocarbon group, or an aromatic hydrocarbon group, Rx1 and Rx2 each independently represent a hydrogen atom, an aliphatic hydrocarbon group, or an aromatic hydrocarbon group).