EP0497368A1 — CNP analog peptides and their use

USPTO Abstract

Novel peptides represented by the general formula: and physiologically acceptable acid addition salts thereof; where (A) represents H-, H-Gly, H-Lys-Gly, H-Ser-Lys-Gly, H-Leu-Ser-Lys-Gly, H-Gly-Leu-Ser-Lys-Gly, H-ser, H-Ser-Ser, H-Arg-Ser-Ser, H-Arg-Arg-Ser-Ser, H-Leu-Arg-Arg-Ser-Ser, H-Ser-Leu-Arg-Arg-Ser-Ser; (B) represents H-Cys or Pmp; (C) represents Phe-, pCℓ-Phe, pF-Phe, pNO₂-Phe or Cha; (D) represents Ile, Val, Aib, tLeu, Gly or Leu; (E) represents Lys or Arg; (F) represents Ile, Leu or Met; (G) represents Ser or Ala; (H) represents Met or Gln; (I) represents -OH, -Asn-OH, -Asn-Ser-OH, -Asn-Ser-Phe-OH, -Asn-Ser-Phe-Arg-OH or -Asn-Ser-Phe-Arg-Tyr-OH; and the symbol "......." represents a disulfide bond;    provided that 1) α-hANP, 2) α-hANP (7 - 28) and 3) CNP-22 are excluded from the scope of that general formula. Also disclosed are agents for suppressing the growth of vascular smooth muscle cells that contains those peptides as effective ingredients.