38 results about "Terlipressin" patented technology

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 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 terlipressin preparation and a preparations method thereof, belonging to the field of medical preparations. The terlipressin preparation comprises active components and auxiliary materials; the active components include terlipressin and pharmaceutically acceptable salts; the auxiliary materials include excipient and a pH regulator; and the weight part ratio of the terlipressin to the excipient to the pH regulator is (1-50):(1-1000):(1-200). Because the terlipressin is easy to degrade under the condition of acid or base, found by research of the invention, the stability of the active components in the terlipressin preparation can be greatly enhanced by selecting a proper pH range. With the pH range determined in the proportion range of the active components to the excipient to the pH regulator determined by the invention, researched by stability test, the stability of the active components is greatly enhanced, and the drug effect period of the active components is greatly prolonged under the same storage condition.

The invention relates to a purifying method for terlipressin. The method is characterized by comprising the following steps: step 1, dissolving a crude terlipressin product with water and adjusting a pH value to 3 to 4; step 2, flushing a C18 reversed-phase filled column by using an ion pair mobile phase A containing surfactant; step 3, loading a solution obtained in the step 1 into a C18 reversed-phase filling material; step 4, carrying out gradient procedures, wherein the initial-state mobile phase B of an elution gradient is 5% which is maintained for 5 min, then the proportion of the mobile phase B is increased to 30% within 60 min, and a part of target peak elution fraction is collected; and step 5, carrying out nanofiltration membrane desalination and then freeze drying so as to obtain pure terlipressin.

The invention provides an ultra-high performance liquid chromatogram detection method for segregation analysis of terlipressin and impurities thereof. The method comprises the step of and carrying out gradient elution on the terlipressin and the impurities thereof by taking a mobile phase A and a mobile phase B which are prepared from a buffer solution and an organic solvent in different proportions as moving phases in an ultra-high performance liquid chromatograph, thereby realizing rapid segregation analysis of the terlipressin and the impurities thereof.

The invention relates to the field of polypeptide synthesis, and specifically relates to a preparation method of terlipressin through combination of solid and liquid. According to the preparation method, Boc-Gly-OH and glycylglycine are subjected to liquid phase synthesis so as to obtain a peptide fragment (Boc-Gly-Gly-Gly-OH); at the same time, solid phase synthesis is performed to obtain a cyclic peptide segment (H-c[Cys-Tyr(OtBu)-Phe-Gln(Trt)-Asn(Trt)-Cys]-Pro-Lys(Boc)-Gly-amino resin); finally the peptide fragment and cyclic peptide segment are coupled to prepare terlipressin resin; and then the terlipressin resin is cracked, purified, and freeze-dried to obtain terlipressin. The provided technology reduces the generation of impurity peptides, improves the purity and yield of coarse peptide, simplifies the operation steps, further reduces the production cost, and can be easily applied to large scale enlarged production.

The invention discloses a Telis-vasophysin preparing method of solid-phase polypeptide, which comprises the following steps: adopting Rink Amide resin (concluding Rink Amide MBHA resin, Rink AmideAM resin) as original material, Fmoc protective amino acid as monomer, TBTU or HBTU-to-HOBt as condensing agent to connect amino sequently; using Boc-Gly-OH for the last peptide chain; adding peptide cutting agent to cut peptide; adding ether to deposit to obtain crude product; adding alkali material to oxidate at 7.5-10.0 pH value to generate oxide crude product; proceeding separation and purifying through C18 (or C8) pillar to produce object product. The method possesses low manufacturing cost, simple technology, high obtaining rate and low environmental pollution, which is convenient to do industrial construction.

The invention discloses a fragment condensation method of terlipressin. The method comprises the following steps: performing solid-phase preparation of full-protection first peptide fragment sequence resin of terlipressin, performing cyclization to form disulfide bonds, and then cracking down the cyclized full-protection first peptide fragment sequence from the resin; performing condensation on the cyclized full-protection first peptide fragment sequence and H-Gly-NH2 in a liquid phase to obtain a cyclized full-protection second peptide fragment sequence; performing liquid-phase or solid-phase preparation of a third peptide fragment sequence of the terlipressin; and performing condensation between the cyclized full-protection second peptide fragment sequence after deamination end protection and the third peptide fragment sequence, then removing all protective groups to obtain a terlipressin crude product, and performing purification and salt conversion to obtain a product namely terlipressin acetate, wherein the first peptide fragment sequence is the amino acid of the 4-11th sites in the terlipressin sequence, the second peptide fragment sequence is the amino acid of the 4-12th sites in the terlipressin sequence, and the third peptide fragment sequence is the amino acid of the 1-3rd sites in the terlipressin sequence.

The invention relates to a method for preparing terlipressin, and belongs to the technical field of polypeptide synthesis. The method comprises the steps that terlipressin peptide resin is synthesized through a fragment condensation method, 3-12 fragments are synthesized through a solid phase method, 1-2 fragments are connected to 3-12 solid phase amino-acid resin, full-peptide resin is obtained, and the terlipressin is obtained after cracking and cyclizing. Due to the fact that Boc-Gly-Cly-OH is adopted as a raw material, lack of glycine impurities is reduced, the operation step of removing glycine protection groups at an N terminal is omitted, product purity is improved, and the total cost is obviously reduced.

The invention belongs to the technical field of medicines, and particularly relates to a related substance analysis method for terlipressin for injection. The content detection method for the terlipressin for injection includes the following steps: (Step 1) preparation of test solvent: the terlipressin for injection is prepared into the test solvent; (Step 2) preparation of self-control solvent: the test solvent is diluted, so that the self-control solvent is prepared; (Step 3) related substance content calculation: the control solvent and the test solvent are respectively injected into high-performance liquid chromatographs, so that chromatograms are obtained, and the related substance content in the test solvent is obtained by calculation.

A method for treating ascites patients by administering the peptide drug terlipressin by continuous infusion. The patients include those whose ascites condition has not progressed to hepatorenal syndrome (HRS). Administration may be accomplished with a continuous infusion pump.

The invention relates to the field of medicines, in particular to terlipressinlipidosome and a preparation method thereof. The invention provides the terlipressinlipidosome, and the pH value of the internal water phase thereof is 7.9 to 8.9. The lipidosomepreparation overcomes the defect that the medicine action time is short. The isoelectric point of the terlipressin is weakly alkaline, the internal pH value of the lipidosome is adjusted to be weakly alkaline, the medicine is deposited under the weakly alkaline condition, and the medicine can be slowly released, so that a bettersustained release effect is achieved. The lipidosome provided by the invention can maintain long action time, the plasma concentration is stable and the occurrence rate of adverse effects is low.

The invention discloses a method for detecting and analyzing high-molecular polymers in terlipressin for injection, and belongs to the technical field of compound detection and analysis. A high performance liquid chromatography is adopted, and chromatographic conditions of the high performance liquid chromatography include the chromatographic column of TSKgel G2000SWXL, the specification of 7.8mm*300mm, the size of 5[mu]m, the mobile phase obtained by preparing a 0.1 mol/L sodium sulfate solution from a 0.1 mol/L phosphate buffer solution, the detection wavelength of 274nm; the flow rate of 0.5 ml/min, the column temperature of 25 DEG C, the sample size of 20 [mu]l, and an isocratic elution mode. The method can be accurately detect the high-molecular polymer in the terlipressin for injection, the content of the high-molecular polymer in a product can be effectively controlled, and the detection method also has the advantages of being simple and highly operable.

The invention relates to the field of synthesis of medicines and discloses a terlipressin synthesis method. A brand new MOBHA resin is used to synthesize the terlipressin, the time for the cyclizationin the molecule is adjusted, the cost is lower in comparison with the exiting Rink Amide series resin, the whole yield of an obtained pure product is remarkably increased, and the whole method is simple and easy to operate, is mild in conditions and is suitable for industrial production.

The invention relates to the technical field of polypeptide synthesis, in particular to a preparation method of a terlipressin impurity Q. The preparation method comprises the following steps: firstly synthesizing a polypeptide fragment I and a polypeptide fragment II which are good in stability, then carrying out disulfide bond exchange on SH of a fourth Cys residue at the C end of the polypeptide fragment I and SNpys or SPyr of the fourth Cys residue at the C end of the polypeptide fragment II through condensation reaction to form a first pair of disulfide bonds, and carrying out iodine oxidation reaction to form a second pair of disulfide bonds while removing an Acm protecting group of the Cys. Experiments show that the terlipressin impurity Q obtained by the preparation method is high in purity and few in impurity, and the purity of a crude product can reach 75% or above.

The invention provides a biological sample pretreatment method of vasopressin and analogues thereof. The method mainly comprises the following steps of melting a biological sample in an ice bath undera dark condition; vortex blending, sucking the sample into a centrifugal tube and then adding ammonia water into the sample; swirling, adding a terlipressin internal standard, swirling uniformly, activating a 96-well plate, transferring the sample into the 96-well plate, leaching with ammonia water, methanol and acetic acid methanol in sequence, eluting twice with TFA methanol, collecting eluenton a new 96-well plate, blow-drying the eluent, redissolving with a methanol aqueous solution, swirling, introducing a sample and analyzing. The method is high in treatment speed, low in cost, simpleand convenient, easy to popularize and capable of effectively solving a problem that in the detection process of the vasopressin and the analogues of the vasopressin, and chromatographic detection andanalysis accuracy is reduced due to too many impurities.

The invention provides inter alia an aqueous solution composition of pH in the range 4.0-6.0 comprising: —terlipressin or a salt thereof; —optionally one or more buffers being substances having at least one ionisable group with a pKa in the range 3.0 to 7.0 and which pKa is within 1 pH unit of the pH of the composition; —optionally an amino acid; and—optionally a tonicity modifier wherein the buffers are present in the composition at a total concentration of 0-5 mM.