Abstract: The present invention provides peptides and pharmacologically active compounds including gonadotropin-releasing hormone (GnRH) analogues according to formulas of the invention, wherein the compounds show an antitumour effect. The invention additionally provides compositions including these peptides and compounds.

Abstract: The present invention provides peptides and pharmacologically active compounds including gonadotropin-releasing hormone (GnRH) analogues according to formulas of the invention, wherein the compounds show an antitumor effect. The invention additionally provides compositions including these peptides and compounds.

Abstract: The invention features novel peptide derivatives called Reversins, and provides for their use in a method of reducing the activity of the multi-drug transporter protein MDR1 in order to overcome multidrug resistance in a mammal. The peptide derivatives are of the formula (I) X1n-X2-X3(X4)n-X5, wherein n is 0 or 1, and each n is the same or different; X1 is BOC, BOC-Asu, Z-Asu, benzyloxycarbonyl, Glu(OBzl)-OBzl, Trp-OMe, Trp-Phe-OMe, Phe-Trp-OMe, Phe-Phe-OtBu, Trp-Trp-OtBu, indoloacetyl, benzoyl, an alkylanine of 1-4 carbons, dibenzylamide, tryptamide, 1-amino-adamantine, aminomethylcyclohexane, indoline, phenylethylamide or dicyclohexylamide; X2 is Glu(OBzl), Asp(OBzl), succinyl, O,O-dibenzoyltartaroyl, diphenoyl, muconyl, Thx, Cpa, Asu, Nal, Pen, Phg, Dbt, Lys(BOC), Lys(Z), Cys(Bzl), Thr(Bzl), Glu(OtBu), tert.-Leu, Leu, Nle, Pro, Phe, Tyr(Bzl), or Ser(Bal); X3 is Asp, Asu, Lys, Glu, Trp, Thx, Cpa, Nal, Pen, Phg, Dbt, Glu(OtBu), tert.

Abstract: The invention relates to tumor-inhibiting heptapeptide and octapeptide amide derivatives and to a method of treating mammals, including men, suffering from tumors or from the excessive secretion of insulin, glucagon or growth hormone using these compounds.

Abstract: The invention relates to new peptides of the formula ##STR1## wherein R.sup.2 represents Ala or D-Ala,R.sup.11 represents Arg or D-Arg,R.sup.13 represents Val or Ile,R.sup.15 represents Gly, Leu, Phe or a valence bond,R.sup.27 represents Met or Nle,R.sup.28 represents Ser, D-Ser or Asn, andY represents OH or NH.sub.2,and to salts thereof. These compounds stimulate the release of growth hormone and can be used in the therapy as well as for veterinary or animal husbandry purposes.

Abstract: The present invention relates to novel gonadoliberine analogues of formula IGlp-His-Trp-Ser-X-W-Leu-Arg-Pro-Y (I)whereinX is Phe-, Tyr (3,5-.sup.3 H) or 3,5-dibromo-tyrosyl,W is Asu or Asp OR, wherein R is alkyl having 1 to 6 carbon atoms or phenyl or phenyl (alkyl having 1 to 4 carbon atoms), which latter two groups may optionally be substituted by nitro or one or more halogen atoms, andY is glycinamide, aza-glycinamide or alkylamino having 1 to 4 carbon atoms,and acid-addition salts thereof, processes for preparing the same and pharmaceutical compositions comprising the same.The novel compounds have an influence on the sexual processes.

Abstract: The invention relates to a process for increasing the sexual activity of birds and useful domestic mammals and for preparing spermatozoa suitable to their propagation. The process of the invention comprises treating sexually mature male birds or useful domestic mammals at least twice and at most four times with 0.1 to 5 .mu.g/kg of body weight of a compound of the general formula (I),Glp-His-Trp-Ser-Tyr-X.sub.1 -Leu-Arg-Pro-X.sub.4 (I)whereinX.sub.1 stands for a glycyl group, a natural or synthetic aminoacid or aminoacid derivative of D configuration, an -Asp-Q group of L configuration, wherein Q is attached to the .alpha.-carbonyl moiety of the aspartyl group and represents a C.sub.1-5 alkylamide, an arylamide, a C.sub.1-4 alkoxy or a benzyloxy group; andX.sub.4 stands for a glycylamide or a C.sub.1-4 alkylamide group,while keeping a pause of at least 30 hours and at most 72 hours between the consecutive treatments.

Abstract: The invention relates to novel gonadoliberine derivatives of the general formula (I) ##STR1## wherein X represents an --O--R group wherein R is a benzyl group or a C.sub.1-4 alkyl group, an ##STR2## group wherein R1 and R2 independently stand for hydrogen, a C.sub.1-5 alkyl, aryl, aryl-C.sub.1-2 -alkyl, morpholino, 1-indolinyl or 1-pyrrolidinyl group,Y is a glycine amide or a C.sub.1-4 -alkyl-amide group,the addition salts thereof formed with acids used in therapy and complexes thereof as well as pharmaceutical compositions containing them, furthermore to a process for the preparation of the above compounds.The reproductive processes of vertebrates can be advantageously influenced with the compounds of general formula (I).

Abstract: The invention relates to new gonadoliberin derivatives of the formula (I)Glp-His-Trp-Ser-Tyr-X-Leu-Arg-Pro-Y, (I)whereinY represents a glycine-amide group or an -NH-alkyl group having 1 to 4 carbon atoms in the alkyl moiety,X stands for a D-thyroxyl, D-thyronyl or D-4-chlorophenylalanyl group,and acid addition salts and metal complexes thereof.The new nona- and decapeptide derivatives have an excellent luteinizing and folliculus stimulating hormone releasing activity, and they can therefore be used as active ingredients in pharmaceutical compositions for human or veterinary application.