269results about "Oxytocins/vasopressins" patented technology

PCT No. PCT/SE97/01968 Sec. 371 Date Aug. 2, 1999 Sec. 102(e) Date Aug. 2, 1999 PCT Filed Nov. 21, 1997 PCT Pub. No. WO98/23636 PCT Pub. Date Jun. 4, 1998Heptapeptide analogues or pharmaceutically acceptable salts thereof consist of a hexapeptide moiety S and a C-terminal beta -aminoalcohol residue Z bound to the moiety S by an amide bond, wherein the beta -aminoalcohol Z is -NR-CH(Q)-CH2OH, Q is (CH2)n-NH-A is H or -C(=NH)NH2, and R is CH3 or C2H5, and the moiety S wherein H is a D-aromatic alpha -aminoacid and Y is an aliphatic alpha -aminoacid and have oxytocin antagonist activity. Also disclosed is: a method of their synthesis; pharmaceutical compositions containing these analogues; the synthesis of such compositions; a method of control of uterine contractions.

A complex is provided for the treatment of neurogenic conditions having the formula:

where R¹ is

M is a metal ion Ca(II), Mg(II), Cu(II) or Ni(II); n is an integer 1 or 2; R is BBB peptide, transferrin, membrane transporter peptide, TAT peptide, bradykinin, beta-endorphin, bombesin, calcitonin, cholecystokinin, an enkephalin, dynorphin, insulin, gastrin, substance P, neurotensin, glucagon, secretin, somatostatin, motilin, vasopressin, oxytocin, prolactin, thyrotropin, an angiotensin, galanin, neuropeptide Y, thyrotropin-releasing hormone, gonadotropnin-releasing hormone, growth hormone-releasing hormone, luteinizing hormone, vasoactive intestinal peptidegluconate, L-lactate, L-leucine, L-tryptophan, and L-glutamate; and R is coupled to M through a carboxylate moiety. Magnesium (II) represents the preferred metal ion as magnesium is known to have neuroprotective effects. The metal ion is in part chelated by a non-steroidal anti-inflammatory drug that does not inhibit platelet activity and includes salicylate and ibuprofenate. The complex also includes a ligand operative in transport across the blood brain barrier. A process for making an inventive complex includes the stoichiometric addition of ligands containing carboxylate groups to a solution of the metal ion. In instances where the metal ion is magnesium (II), a stoichiometric ratio of 1:1:1 is found between the non-steroidal anti-inflammatory ligand:magnesium (II):transporter ligand.

The invention provides a solid-phase synthesis method of carbetocin, and the method comprises the following steps of: sequentially coupling amino acid containing Fmoc (fluorenylmethoxycarbonyl) protecting group by Rink Amide AM Resin to obtain Fmoc-Cys(CH2CH2CH2COOCH2CH2CN)-Pro-Leu-Gly-Rink Amide AM Resin; then sequentially coupling the remaining Fmoc-amino acid, removing the protecting group, and cyclizing to obtain carbetocin-Amide AM Resin; and cracking, purifying and freeze-drying to obtain the carbetocin. The carbetocin is subjected to solid-phase cyclization synthesis by using a novel mercapto protecting group and a false solid-phase dilution principle. The solid-phase synthesis method is simple to operate, low in cost and environmentally-friendly, and meanwhile can be used for greatly improving the purity and the yield as a solid-phase cyclization technology is used at the same time.

The invention discloses a method for improving the stability of polypeptide active pharmaceutical ingredients. The polypeptide active pharmaceutical ingredients comprise but are not limited to bivalirudin, octreotide acetate, lanreotide acetate, eptifibatide or cetrorelix acetate, ganirelix acetate, degarelix, liraglutide, oxytocin, thymosin alpha1, leuprolide acetate, goserelin acetate, terlipressin or linaclotide. The method comprises the steps that after polypeptide drugs are salified, a polypeptide solution containing compensation ions is obtained, and a target polypeptide product is prepared through an ultralow temperature vacuum freeze-drying method. According to the method for improving the stability of the polypeptide active pharmaceutical ingredients, the problem that the polypeptide active pharmaceutical ingredients are prone to degradation after being placed for a long time is solved, the uniformity of the product is improved, and the drug risk is reduced.

The invention discloses a method for synthesizing terlipressin by solid-phase oxidization and cyclization. The method comprises the following steps: (1) obtaining Fmoc-Gly-amino resins by using Fmoc-Gly-OH and amino resins; (2) coupling the Fmoc-Gly-amino resins one by one to obtain linear terlipressin-amino resins; (3) synthesizing the linear terlipressin-amino resins into terlipressin-amino resins by adopting iodine solid-phase oxidized cyclization; (4) cracking and cutting the terlipressin-amino resins to obtain raw peptides of the terlipressin; and (5) carrying out purification, salt conversion and freeze-drying on the raw peptides to obtain terlipressin acetate. The invention has the key innovations that solid-phase oxidization reduces a large amount of waste liquid brought by liquid-phase oxidization, accelerates the reaction time, belongs to process greening reformation and greatly improves the total yield.

The invention provides a synthesis process of carbetocin. The synthesis process comprises the following steps: performing a coupling reaction on Fmoc-Gly-OH with Rink Amide-AM Resin obtained in the first step to obtain Fmoc-Gly-Rink Amide-AM Resin; performing deprotection (20% piperidine) with DBLK to obtain H-Gly-Rink Amide-AM RFesin, and orderly completing the coupling of the H-Gly-Rink Amide-AM Resin with Fmoc-Leu-OH, Fmoc-Pro-OH, Fmoc-Cys(Trt)-OH, Fmoc-Asn(Trt)-OH, Fmoc-Gln(Trt)-OH, Fmoc-Ile-OH, Fmoc-Tyr(Me)-OH and tetrachlorobutyric acid until carbetocin linear peptide resin is synthesized; mixing a cracking agent with the carbetocin linear peptide resin obtained in the fourth step to have a cracking reaction, thereby removing the Rink Amide-AM Resin and side chain protecting groups; cyclizing the carbetocin linear crude peptide into a carbetocin crude product, and separating and purifying the carbetocin crude product to obtain the carbetocin. The synthesis process has the advantages that the polymerization side reaction is prevented, the process route is greatly simplified, the production cost is reduced and the synthesis efficiency is improved; in addition, the purity of the finished product is high; in short, the synthesis process is convenient for large-scale production, and meanwhile, advantageous for environmental protection, and has remarkable economic and social benefits.

The invention discloses a method for preparing vasopressin tannate. The preparation method of the vasopressin comprises the following step: sequentially carrying out reverse-phase purification and reverse-phase desalination on a vasopressin crude product solution by a high performance liquid chromatography, so as to obtain the vasopressin tannate, wherein packing of the high performance liquid chromatography, is a polystyrene-divinylbenzene (PS-DVB) copolymer. By combination of reverse-phase purification and reverse-phase desalination, the latest application of the polymer packing polystyrene-divinylbenzene is designed; and the vasopressin tannate can be prepared on a large scale.

The invention belongs to the technical field of preparation methods of polypeptide drugs and particularly relates to a preparation method of Terlipressin. The method uses protected amino acid fragment Gly-Gly-Gly as a raw material to avoid the generation of impurities. The method comprises the following steps: preparing Terlipressin linear peptide resin by adopting a solid phase polypeptide method, performing acidolysis to obtain crude Terlipressin linear peptide, oxidizing to obtain crude Terlipressin and purifying to obtain pure Terlipressin, wherein the solid phase polypeptide method is as follows: amino resin is connected in the Fmoc-protected amino acid of the corresponding fragments in the following sequence in turn through a solid phase coupling synthesis method to prepare the Terlipressin linear peptide resin, the sequence is R1-X-Cys(R2)-Tyr(tBu)-Phe-Gln(R3)-Asn(R3)-Cys(R2)-Pro-Lys(Boc)-Gly-resin, the fragment X is Gly-Gly-Gly, R1 is R4 or H, R2 is Trt or Acm, R3 is Trt or H, R4 is Fmoc or Boc, and the fragment X is grafted only by performing the solid phase coupling synthesis reaction once. The method uses the new raw material, thus the product yield can be increased and the production cycle is greatly shortened.

The invention discloses a method for preparing oxytocin through solid phase polypeptide synthesis, comprising following steps: taking Rink Amide resin (comprising Rink Amide MBHA resin, Rink Amide Am resin) as raw material, taking amino acid protected by Fmoc, TBTU or HBTU/ HOBt as condensing agent, making up amino acid in sequence; adding peptide cutting agent for peptide cutting, adding for precipitation and getting reduced coarse product; adding basic matter, feeding air for oxidation or oxiding with H2O2 with pH being 7.5- 10.0, getting oxidized coarse product; separating and purifying by using C18 or C 8 column and getting final product. The method is characterized by low production cost, simple process, little pollution, high production rate and convenience for industrial production.

An object of the present invention is to provide a protein useful as a sphingomyelin detecting probe, which specifically recognizes sphingomyelin and has low cytotoxicity. The present invention provides a protein which has an amino acid sequence having, as the amino acid sequence from the 1st to the 48th amino acid, the amino acid sequence from the 1st to the 48th amino acid in Lysenin 1, and as the amino acid sequence from the 49th to the 298th amino acid, the amino acid sequence from the 51st to the 300th amino acid in Lysenin 3; and a protein which is obtained by deleting N terminal and/or C terminal from earthworm toxins Lysenin 1 or 3, and which specifically recognizes sphingomyelin.

The present invention relates to a method for prognosis of an outcome or assessing the risk of a patient having suffered a stroke or a transient ischemic attack, comprising the determination of the level of at least one marker peptide in said sample said marker peptide selected from the group comprising ANP, AVP, ADM, ET-1, troponin, CRP, calcitonin and hGH or fragments thereof or its precursor or fragments thereof and attributing the level of said at least one marker peptides its precursor or fragments thereof with the prognosis of an outcome or assessing the risk for said patient.

The invention relates to a method for synthesizing atosiban by a solid phase, which comprises the following steps: 1) de-Fmoc-protecting Rink Amide resin serving as a carrier to obtain H2N-Rink Amide resin; 2) connecting carboxyl of Fmoc-Gly-OH and amino of the resin by using HOBT and DIPCI as condensation reagents to obtain Fmoc-Gly (resin); 3) solid-phase synthesizing sequence residue amino acid in turn by adopting Fmoc strategy; 4) performing solid-phase cyclization by using iodine; 5) then cutting the sequence residue amino acid by using pyrolysis reagents (trifluoroacetic acid/thioanisole/1, 2-dimercaptoethane/water), and settling the sequence residue amino acid by diethyl ether to obtain raw atosiban peptide; and 6) treating the raw product through HPLC preparation and separation to obtain a pure atosiban product.

The invention discloses a method for preparing octreotide and octreotide acetate. The method for preparing octreotide comprises the following steps: sequentially performing reverse phase purification and reverse phase desalination on an octreotide crude product solution by using a high performance liquid reversion phase chromatography method, wherein the packing of the high performance liquid reversion phase chromatography method is a poly styrene-divinyl benzene (PS-DVB) copolymer. The method integrates reverse phase purification and reverse phase desalination, novel application of the copolymer packing, namely, the styrene-divinyl benzene, is designed, and octreotide and octreotide acetate can be prepared in a large scale.

More efficient and/or economical methods for synthesizing heptapeptide alcohol analogs of oxytocin are provided along with novel intermediates which are useful in synthesizing such oxytocin analogs. Efficient and economical methods for synthesizing intermediates useful in synthesizing these oxytocin analogs are also provided.

The invention relates to a solid-phase synthesis method of carbetocin, which comprises the following steps: reacting a PAM (polyacrylamide) resin and Fmoc-Gly-OH to obtain an Fmoc-Gly-PAM resin; sequentially connecting amino acid with Fmoc protective group by solid-phase synthesis to obtain a BrCH2CH2CH2CONH-Tyr(OMe)-Ile-Gln-Asn-Cys(Mmt)-Pro-Leu-Gly-PAM resin; removing the Mmt protective group in the Cys; carrying out cyclization reaction by using DMAP (dimethylaminopyridine) as a cyclization reagent to obtain Cyclo[CH2CH2CH2CO-Tyr(OMe)-Ile-Gln-Asn-Cys]-Pro-Leu-Gly-PAM; carrying out ammonolysis on the cyclization product with an ammonia methanol solution to obtain a carbetocin crude product; and purifying and freeze-drying to obtain the carbetocin. The total yield is up to higher than 45%. Compared with the conventional preparation method, the method provided by the invention avoids using abundant high-concentration strongly-corrosive acid and flammable and explosive aether, has the advantages of high yield, low cost, mild reaction conditions and small environmental pollution, and is beneficial to industrialized production.

The invention discloses a preparation method of terlipressin. The preparation method comprises the following steps of: deprotecting RinkAmideAM resin by using a deprotection reagent so as to remove a Fmoc protection group; coupling amino acids orderly with the deprotected RinkAmideAM resin as the starting raw material, the Fmoc protected amino acids as monomers and HOBt/DIC as a condensating agent, thus obtaining terlipressin peptide resin; before coupling the second to twelfth amino acids, depriving the Fmoc protection group of the last coupled product by using the deprotection reagent orderly; cracking the terlipressin peptide resin and then adding diethyl ether for settling the terlipressin peptide resin, thereby obtaining reduced terlipressin crude peptide; cyclizing the reduced terlipressin crude peptide to obtain oxidized terlipressin crude peptide; purifying the oxidized terlipressin crude peptide, converting the crude peptide into a salt, and then condensating and freeze-drying the oxidized terlipressin crude peptide, thus obtaining the terlipressin. The yield of the terlipressin prepared by the preparation method provided by the invention is 50% or above.

The invention discloses an oxytocin preparation method which comprises respectively synthesizing intermediate a and intermediate b, using diphenyl azidophopshate as condensing agent, in the presence of DMF, DPPA, dioxane, piperidine, TFA and DCM, to react the intermediates a, b, controlling the reaction temperature at -20-40DEG C and reaction time of 10-40h, feeding air, after the oxidization, drying in vacuum to remove the solvent in the reaction system to obtain oxytocin. The invention has complete connected peptide chain, simple purification, simple process, high yield, high optical activity and chemical purity of target product oxytocin.

The invention discloses a preparation method for an oxytocin deamidation impurity. The preparation method comprises the following step of: successively subjecting a solution of a crude oxytocin deamidation impurity precursor to reversed-phase cyclization, reversed-phase purification and reversed-phase desalination by adopting high-performance liquid-phase reversed-phase chromatography, wherein a filling material for the high-performance liquid-phase reversed-phase chromatography is silica gel C18; and the crude oxytocin deamidation impurity precursor contains two free sulfhydryl groups. The preparation method provided by the invention innovatively adopts a reversed-phase adsorption method for cyclization, purification and desalination, solves the problems of cyclization, purification and desalination once for all, optimizes the production process, and is applicable to continuous industrial production.

The invention provides a solid-phase synthetic method of oxytocin, which comprises the following steps: (I) preparing Rink Amide AM Resin by using AM Resin and Rink Amide Linker as raw materials; (II) orderly coupling Fmoc protecting group-containing amino acids to the Rink Amide AM Resin prepared in the step (I) through a solid-phase synthetic method, removing the protecting group, cracking to obtain linear oxytocin; (III) oxidizing the linear oxytocin, performing purification and freeze drying to obtain the oxytocin. The synthetic process of the invention is simple, low in cost, high in yield, easy for purification, less in environmental pollution, and suitable for industrial production.