| Abstract: | A novel method of treating prostate adenocarcinoma, prostate benign hypertrophia, endometriosis, dysmenorrhea, hirsuitism, hormono-dependent mammary tumors, treatment and prevention of precocious puberty, induction of a retardation of the appearance of puberty and treatment of acne of mammals comprising administering to warm-blooded animals an effective amount of a peptide of the formula wherein (a) Z is Gly--NH.sub.2, Y is Leu and X is Gly, (b) Z is Gly--NH.sub.2, Y is Leu, X is DN Leu, DN Val, D Abu (.alpha.-aminobutyric acid), D Phe, D Ser, D Thr, D Met, D Pgl, D Lys, Leu, Ile, Nle, Val, N Val, Met, Phe, D Leu, D Arg, D Ser (tbu), D Thr (tbu), D Cys (tbu), D Asp (O tbu), D Glu (Otbu), D Orn (boc), D Lys (boc), D Trp, Trp, 2-methyl Ala, D Tyr, D Met, .epsilon.-lauryl -D Lys, .epsilon.-dextran-D Lys, (c) Z is NH-cyclopropyl-or NH--Alk wherein Alk is alkyl of 1 to 3 carbon atoms, Y is Leu and X is D Ser (tbu), D Thr (tbu), D Asp (Otbu), D Glu (Otbu), D Orn (boc), D Lys (boc), (d) Z is --NH--CH.sub.3, --NH--CH.sub.2 --CH.sub.3, NH--CH.sub.2 --CH.sub.2 --CH.sub.3, --NH--CH.sub.2 --CH.sub.2 --OH, ##STR1## Y is Leu and X is Gly, (e) Z is --NH--CH.sub.2 --CH.sub.3, Y is Leu and X is D Trp, D Leu, D Ala, D Ser (tbu), D Tyr, D Lys, Ala, (f) Z is Gly--NH.sub.2 or --NH--CH.sub.2 --CH.sub.3, Y is N.alpha.Me Leu and X is Gly, (g) Z is --NH--cyclopropyl, Y is Leu and X is D Leu or (h) Z is Gly--NH.sub.2, --NH--cyclopropyl or --NHAlk' where Alk' is alkyl of 1 to 3 carbon atoms, Y is Ser (but), Cys (but), Asp (Obut), Glu (Obut), Orn (boc), Lys (boc) and X is Gly. |
