申请人:The Adminstrators of the Tulane Educational Fund
公开号:US04914189A1
公开(公告)日:1990-04-03
Human pancreatic GRF (hpGRF), rat hypothalamic GRF (rGRF) and porcine hypothalamic GRF (pGRF) have been earlier characterized and synthesized. The invention provides synthetic peptides which are extremely potent in stimulating the release of pituitary GH in animals, including humans, which have resistance to enzymatic degradation in the body, and which have the sequence: ##STR1## wherein Q.sup.1 is an omega or alpha-omega substituted alkyl, Q.sup.2 is a lower omega-quanidino-alkyl group. R.sub.2 is Ala, D-Ala, or D-N-Methyl-Ala R.sub.3 is Asp, D-Asp, Glu, or D-Glu R.sub.8 is Asn, D-Asn, Ser, or D-Ser R.sub.10 is Tyr or D-Tyr R.sub.12 is Lys, D-Lys Arg or Orn R.sub.13 is Val or Ile R.sub.14 is Leu or D-Leu R.sub.15 is Gly, N-Methyl-Gly, or D-Ala R.sub.17 is Leu or D-Leu R.sub.18 is Tyr or Ser R.sub.23 is Leu or D-Leu R.sub.24 is Gln or His R.sub.25 is Asp, D-Asp, Glu, or D-Glu R.sub.27 is Met, D-Met, Ala, Nle, Ile, Val, Nva, Leu R.sub.28 is Asn or Ser The peptides as well as nontoxic salts thereof may be administered to animals, including humans and cold-blooded animals, to stimulate the release of GH and may be used diagnostically.
人类胰岛素样生长激素释放因子(hpGRF)、大鼠下丘脑生长激素释放因子(rGRF)和猪下丘脑生长激素释放因子(pGRF)早已被表征和合成。本发明提供了一种合成肽,它们在动物(包括人类)中刺激垂体生长激素的释放非常强劲,并且在体内有抗酶降解性,其序列为: ##STR1## 其中Q.sup.1是ω或α-ω取代烷基,Q.sup.2是较低的ω-胍基烷基。R.sub.2是Ala、D-Ala或D-N-甲基-Ala,R.sub.3是Asp、D-Asp、Glu或D-Glu,R.sub.8是Asn、D-Asn、Ser或D-Ser,R.sub.10是Tyr或D-Tyr,R.sub.12是Lys、D-Lys Arg或Orn,R.sub.13是Val或Ile,R.sub.14是Leu或D-Leu,R.sub.15是Gly、N-甲基-Gly或D-Ala,R.sub.17是Leu或D-Leu,R.sub.18是Tyr或Ser,R.sub.23是Leu或D-Leu,R.sub.24是Gln或His,R.sub.25是Asp、D-Asp、Glu或D-Glu,R.sub.27是Met、D-Met、Ala、Nle、Ile、Val、Nva或Leu,R.sub.28是Asn或Ser。这些肽及其无毒盐可以被用于刺激动物(包括人类和冷血动物)的GH释放,并可用于诊断。