The peptides of formula (I) where: R1 is the group attached to the N-terminal of the first amino acid of the sequence P, optionally via the ligand X, and is selected from H, CH3C(═O)—, and maleimide; X is a biradical selected from —NH—(CH2)r—C(═O)—, —C(═O)—(CH2)r—C(═O)—, —S(CH2)r—, —S—(CH2)r—C(═O)—, —O—(CH2)r—, —S—CH—CH(NH2)—C(═O)—, —O—(CH2)r—C(═O)—, —(CH2)r—C(═O)—, —NH—O—CH2—C(═O)—NH—(CH2)r—CH(NH2)—C(═O)—, —(CH2)r—C(═O)—NH—(CH2)r—CH(NH2)—C(═O)—, and —NH—(CH2)r—CH(NHC(═O)CH2NH2)—C(═O)—; r is 1-5; P is a biradical of an amino acid sequence comprising the sequence D-Pro-D-Trp-D-Val-D-Pro-D-Ser-D-Trp-D-Met-D-Pro-D-Pro-D-Arg-D-His-D-Thr (SEQ ID NO: 1); Y is the group attached to the C-terminal of the last amino acid of the sequence P, and is selected from —NH2, —OH, —OR2 and —NHR2; R2 is a radical selected from (C1-C6)-alkyl and (CH2)2—NH—C(═O)—CH2—O—NH2; k is 0-2; m is 0-1; with the proviso that when the biradical X is —C(═O)(CH2)r—C(═O)—, then R1 is H; when the N of the amino acid of the sequence P to which is attached the biradical X is a biradical —NH—, then m is 1, and when is a biradical —N—, then m is 0; and when R1 is maleimide then the biradical X is —C(═O)—(CH2)r—C(═O)—, —(CH2)—C(═O)—, —(CH2)r—C(═O)—, and —(CH2)r—C(═O)—NH—(CH2)r—CH(NH2)—C(═O)—. The peptides are useful as shuttles through the blood brain barrier (BBB). The constructs BBB-shuttle-cargo, being the cargo of a biologically active substance or for use in a diagnostic method, are useful in therapy and diagnosis.
R1—(X)K—P—Y (I)
式(I)中的肽段:其中:R1是附加到序列P的第一个
氨基酸的N末端的基团,可选地通过
配体X连接,选择自H、CH3C(═O)—和马来
酰亚胺;X是从—NH—(
CH2)r—C(═O)—、—C(═O)—( )r—C(═O)—、—S( )r—、—S—( )r—C(═O)—、—O—( )r—、—S—CH—CH(NH2)—C(═O)—、—O—( )r—C(═O)—、—( )r—C(═O)—、—NH—O— —C(═O)—NH—( )r—CH(NH2)—C(═O)—、—( )r—C(═O)—NH—( )r—CH(NH2)—C(═O)—和—NH—( )r—CH(NHC(═O) NH2)—C(═O)—中选择的双基团;r为1-5;P是
氨基酸序列的双基团,包括序列D-Pro-D-Trp-D-Val-D-Pro-D-Ser-D-Trp-D-Met-D-Pro-D-Pro-D-Arg-D-His-D-Thr(序列ID编号:1);Y是附加到序列P的最后一个
氨基酸的C末端的基团,选择自—NH2、—OH、—OR2和—NHR2;R2是从(C1-C6)-烷基和( )2—NH—C(═O)— —O—NH2中选择的基团;k为0-2;m为0-1;但是当双基团X为—C(═O)( )r—C(═O)—时,R1为H;当连接双基团X的序列P的
氨基酸的N为双基团—NH—时,m为1,当为双基团—N—时,m为0;当R1为马来
酰亚胺时,双基团X为—C(═O)—( )r—C(═O)—、—( )—C(═O)—、—( )r—C(═O)—和—( )r—C(═O)—NH—( )r—CH(NH2)—C(═O)。这些肽段可用作穿越血脑屏障(BBB)的穿梭体。构建物BBB-穿梭体-货物,作为
生物活性物质的货物或用于诊断方法,对于治疗和诊断是有用的。R1—(X)K—P—Y (I)