The United States Government As Represented by the Department of Veterans Affairs

University of Miami

The Administrators of the Tulane Educational Fund

United States of America Represented by the Deparment of Veterans Affairs

Marta Zarandi

Andrew V Schally

Jozsef L Varga

Ren Zhi Cai

Katalin Toth

There is provided a novel series of synthetic analogs of hGH-RH(1-29)NH(SEQ ID NO: 1) and hGH-RH(1-30)NH. Of particular interest are those carrying PhAc, N-Me-Aib, Dca, Ac-Ada, Fer, Ac-Amc, Me-NH-Sub, PhAc-Ada, Ac-Ada-D-Phe, Ac-Ada-Phe, Dca-Ada, Dca-Amc, Nac-Ada, Ada-Ada, or CH&#x2014;(CH)&#x2014;CO-Ada, at the N-Terminus and &#x3b2;-Ala, Amc, Apa, Ada, AEA, AEP, &#x3b5;-Lys(&#x3b1;-NH), Agm, Lys(Oct) or Ahx, at the C-terminus. These analogs inhibit the release of growth hormone from the pituitary in mammals as well as inhibit the proliferation of human cancers, and inhibit the hyperplastic and benign proliferative disorders of various organs, through a direct effect on the cancerous and non-malignant cells. The stronger inhibitory potencies of the new analogs, as compared to previously described ones, result from replacement of various amino acids.

N- and C-terminal substituted antagonistic analogs of GH-RH

There are provided a novel series of peptide analogs of hGH-RH(1-29)NHand hGH-RH(1-30)NHwhich show high activities in stimulating the release of pituitary GH in animals. They retain their physiological activity in solution for extended periods of time and resist enzymic degradation in the body. These novel and useful properties appear to be due to novel substitution patterns ant at the 1, 15, 27 and 29 positions on the peptide.

GH-RH analogs with potent agonistic effects

N- and C- terminal substituted antagonistic analogs of GH-RH

Novel fluorinated synthetic analogs of hGH-RH(1-30)NHthat inhibit the release of growth hormone from the pituitary in mammals as well as inhibit the proliferation of human cancers through a direct effect on the cancer cells, and to therapeutic compositions containing these novel peptides and their use.

Fluorinated GHRH antagonists

There is provided a novel series of synthetic antagonistic analogs of hGH-RH(1-29)NH. These analogs inhibit the activity of endogenous hGH-RH on the pituitary GH-RH receptors, and therefore prevent the release of growth hormone. The analogs also inhibit the proliferation of human cancers through a direct effect on the cancer cells. The higher inhibitory potencies of the new analogs, as compared to previously described ones, results from replacement of various amino acids.

Antagonistic analogs of GH RH (2003)

There is provided a novel series of synthetic analogs of hGH-RH(1&#x2013;29)NH. These analogs inhibit the activity of endogenous hGH-RH, and therefore prevent the release of growth hormone. The stronger inhibitory potencies of the new analogs, as compared to previously described ones, results from replacement of various amino acids.

Antagonistic analogs of GH-RH inhibiting IGF-I and -II

There is provided a novel series of synthetic analogs of hGH-RH(1-29) NH.sub.2. These analogs inhibit the activity of endogenous hGH-RH, and therefore prevent the release of growth hormone. The stronger inhibitory potencies of the new analogs, as compared to previously described ones, results from replacement of various amino acids.

A peptide selected from the group having the formulae: .alpha.) X-R.sup.1 -R.sup.2 -R.sup.3 -R.sup.4 -R.sup.5 -R.sup.6 -Thr-R.sup.8 -R.sup.9 -R.sup.10 -R.sup.11 -R.sup.12 -Val-Leu-R.sup.15 -Gln-Leu-Ser-R.sup.19 -R.sup.20 -R.sup.21 -Leu-Leu-Gln-Asp-Ile-R.sup.27 -R.sup.28 -R.sup.29, wherein X is H, Ac, Aqc, IAc, BrProp, For, Ibu, Nac, 2-Nac, 1- or 2-Npt, 1- or 2-Npr, PhAc, Fpr, or any other aromatic or nonpolar acyl group, R.sup.1 is Tyr, His or Phe(Y), in which Y=H, F, Cl, Br, NO.sub.2, CH.sub.3 or OCH.sub.3, R.sup.2 is D-Arg, D-Cit, D-Har, D-Lys, D-Tic or D-Orn, R.sup.3 is Asp, D-Asp, Ala, D-Ala or Gly, R.sup.4 is Ala, Abu or Gly, R.sup.5 is Ile, Ala or Gly, R.sup.6 is Phe, Tic, Ala, Pro, Tpi, Nal or Phe(Y), in which Y=H, F, Cl, Br, NO.sub.2, NH.sub.2, CH.sub.3 or OCH.sub.3, R.sup.8 is Asn, Gln, Ser, Thr, Val, Leu, Ile, Ala, D-Ala, D-Asn, D-Gln, D-Thr, D-Leu, Abu, D-Abu, Nle, or Alb, R.sup.9 is Ser, R.sup.10 is Tyr or Phe(Y), in which Y=H, F, Cl, Br, NO.sub.2, CH.sub.3 or OCH.sub.3, R.sup.11 is Arg, D-Arg, or Cit, R.sup.12 is Lys, D-Lys, Cit, D-Cit, Orn, D-Orn, Nle or Ala, R.sup.15 is Gly, Ala, Abu or Gln, R.sup.19 is Ala or Abu, R.sup.20 is Arg, D-Arg or Cit, R.sup.21 is Lys, D-Lys, Orn or Cit, R.sup.27 is Met, Nle or Abu, R.sup.28 is Ser, Asn, Ala or Abu, R.sup.29 is Agm, Arg-NH.sub.2, Arg-OH, Cit-NH.sub.2, Cit-OH, Har-NH.sub.2 or Har-OH, and .beta.) X-A.sup.1 -B.sup.2 -A.sup.3 -R.sup.4 -R.sup.5 -R.sup.6 -Thr-A.sup.8 Ser-R.sup.10 -R.sup.11 -B.sup.12 -Val-Leu-R.sup.15 -A.sup.16 -A.sup.17 -Ser-R.sup.19 -B.sup.20 -B.sup.21 -Leu-Leu-Gln-A.sup.26 -Ile-R.sup.27 -R.sup.28 -R.sup.29, wherein a lactam bridge is formed between any one of the pairs of positions 1,2; 2,3; 8,12; 16,20; 17-21; 21,25; 25,29 or both 8,12 and 21,25 positions, and X is H, Ac, Aqc, IAc, BrProp, For, Ibu, Nac, 2-Nac, 1- or 2-Npt, 1- or 2-Npr, PhAc, Fpr, or any other aromatic or nonpolar acyl group, A is Glu, D-Glu, Gln, Asp, D-Asp, Asn, Abu, Leu, Tyr, His, Phe(Y), in which Y=H, F, cl, Br, NO.sub.2, NH.sub.2, CH.sub.3 or OCH.sub.3, Ser, Thr, Val, Ile, Ala, D-Ala, D-Asn, D-Gln, D-Thr, D-Leu, Abu, D-Abu, Nle, or Aib, B is Lys, D-Lys, Arg, D-Arg,Orn, D-Orn, or Agm; R.sup.4 is Ala, Abu or Gly, R.sup.5 is Ile, Ala or Gly, R.sup.6 is Phe, Tic, Tpi, Nal or Phe(Y), in which Y=H, F, Cl, Br, NO.sub.2, NH.sub.2 CH.sub.3 or OCH.sub.3, R.sup.10 is Tyr or Phe(Y), in which Y=H, F, Cl, Br, NO.sub.2, NH.sub.2 CH.sub.3 or OCH.sub.3, R.sup.15 is Gly, Ala, Abu or Gin, R.sup.27 is Met, Nle or Abu, R.sup.28 is Ser, Asn, Asp, Ala or Abu, and pharmaceutically acceptable salts thereof.

HGH-RH(1-29)NH2 analogues having antagonistic activity

Synthetic analogues of hGH-RH(1-29)NH.sub.2 having substitutions of various amino acids and acylated at the N-terminus, and exhibiting prolonged antagonistic duration. Embodiments include analogues of the formula: ##STR1## wherein X is nil, H, Ac, IAc, BrProp, Ibu, Nac, 2-Nac, 1- or 2-Npt, 1- or 2-Npr or Aqc; R.sup.1 is Tyr, His, Glu or Glt; R.sup.2 is D-Arg, D-Cit, D-Har, D-Lys or D-Orn; R.sup.3 is Asp, Ala or Gly; R.sup.4 is Ala or Gly; R.sup.5 is Ile, Ala or Gly; R.sup.6 is Phe, Ala, Pro, Tpi, Nal or Phe(Y), in which Y is F, Cl, Br, NO.sub.2, CH.sub.3 or OCH.sub.3 ; R.sup.8 is Asn, Ser, Val, Ile, Ala, Abu, Nle, or Aib; R.sup.11 is Arg, D-Arg or Cit; R.sup.12 is Lys, D-Lys, Cit or Ala; R.sup.15 is Gly, Ala, Abu or Gln; R.sup.19 is Ala or Abu; R.sup.20 is Arg, D-Arg or Cit; R.sup.21 is Lys, D-Lys or Cit; R.sup.27 is Met, Nle or Abu; R.sup.28 is Ser, Asn, Asp or Abu; R.sup.29 is Agm, Arg-NH.sub.2, Arg-OH, Cit-NH.sub.2, Cit-OH, Har-NH.sub.2 or Har-OH; provided that when R.sup.1 is Glt, X is nil and when X is H, R.sup.15 is other than Gly, and pharmaceutically acceptable acid addition salts thereof.

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Szeged, Hungary

Marta Zarandi