182 results about "Exenatide" patented technology

This invention provides compositions comprising a byetta, fish oil, and a protease inhibitor, method for treating diabetes mellitus, comprising administering same, and methods for oral or rectal administration of a byetta.

Methods for treating metabolic diseases are described for intranasal delivery of an exenatide, comprising an aqueous mixture of exendin, and a delivery enhancer selected from the group consisting of a solubilizer, a chelator, and a surfactant, and the pharmaceutical formulations used therein.

The invention discloses an Exenatide release microsphere preparation mainly comprising the following components in percentage by weight: 0.5-10 percent of Exenatide and 85-99 percent of polylactic acid-glycolic acid copolymer. The invention also discloses a preparation method and an application of the Exenatide release microsphere preparation. The Exenatide release microsphere preparation not onlycan prolong the action time of the Exenatide in the body and reduce the medicine application frequency, but also can maintain the effective blood-medicine concentration of the Exenatide and improve the treatment effect.

The invention relates to exenatide joined with polyethylene glycol. The structural general formula of exenatide is (I), mPEG represents residue of methoxy polyethylene glycol, the selected value of n is 0-3, R represents an exenatide molecule from which an amino is removed, the amino is of lysine residue or of N-end histidine residue in the exenatide molecule, and the molecular weight of the exenatide joined with polyethylene glycol is 9,800-110,000. The invention further relates to a preparation method of the compound and application of the compound in preparing medicines for curing type 2 diabetes mellitus. The exenatide joined with polyethylene glycol has the advantages of being long in half-life period and good in stability and hypoglycemic effect.

The invention discloses a method for preparing Exenatide, which comprises the following steps of: 1) using Fmoc-Ser(tBu)-OH and Sieber Amide resin with substitutability of 0.1 mmol/g to 0.8 mmol/g as starting material, and obtaining Fmoc-Ser(tBu)-Sieber Amide resin; 2) linking amino acids with protective groups in sequence by adopting a coupling way, synthesizing and obtaining Exenatide-Sieber Amide resin with full-protective lateral chains; and 3) conducting pyrolysis to the resin to remove the protective groups, precipitating with ether and obtaining crude peptides; and conducting high pressure liquid phase purification and freeze drying to the crude peptides and obtaining the Exenatide. The technology for preparing the Exenatide is characterized by simple reaction operation, easy post treatment, high yield, low cost and the like, and has considerable economical and practical value and wide application prospect.

The invention provides a stable exenatide sustained-release microsphere preparation and a preparation method thereof. The preparation contains 0.1 to 12.5 mass percent of exenatide and 77.5 to 99 percent of glycolide and lactide copolymer. The preparation method comprises the following steps: (a) dissolves glycolide and lactide copolymer in an organic solvent to form an oil phase, wherein the organic solvent may be one or the combination of dichloromethane and ethyl acetate; (b) dissolving exenatide, a protective agent and a suspending aid in water to form an internal water phase; (c) mixing the internal water phase and the oil phase to form emulsion; and (d) after the organic solvent violates, obtaining exenatide-containing sustained-release microspheres. As the formula composition of the stable exenatide sustained-release microsphere preparation is reasonable, the stable exenatide sustained-release microsphere preparation is prepared by common sustained-release microsphere technique, and the sustained-release period of the sustained-release microspheres is as long as 7 to 35 days. The technical effect is better when the exenatide sustained-release microspheres are prepared by a multiple emulsion (water-oil-water) method.

Provided herein are pharmaceutical formulations containing exendins, exendin agonists, or exendin analog agonists that are administered at therapeutic plasma concentration levels over a sustained period of time to lower total cholesterol levels; to lower LDL-cholesterol levels; to lower triglyceride levels; to treat dyslipidemia; to treat and slow the progression of atherosclerosis; and to treat, prevent, and reduce the risk of heart attacks and strokes in patients. In the pharmaceutical formulations and methods of the invention, the exendin may be exendin-4, an exendin-4 agonist, or an exendin-4 analog agonist. The pharmaceutical formulations may be polymer-based pharmaceutical formulations that may be administered once weekly. An exemplary pharmaceutical formulation comprises 5% (w/w) of exenatide, about 2% (w/w) of sucrose, and about 93% (w/w) of a poly(lactide-co-glycolide) polymer, wherein the poly(lactide-co-glycolide) polymer is in the form of microshperes encapsulating the exenatide.

The invention discloses a nasal cavity drop for treating diabetes and a preparation method. The nasal cavity drop comprises solvent and accessories, and is characterized in that the solvent contains a compound of calcium phosphate nano particles and exenatide, the weight ratio of the calcium phosphate nano particles to the exenatide in the compound is 1-10:0.1-10, and the content of the exenatide in the solvent is 0.01 to 0.5 milligram per milliliter. The preparation method for the nasal cavity drop comprises the following steps: mixing aqueous solutions of calcium salt, phosphate, citrate and exenatide to form the compound of the calcium phosphate nano particles and the exenatide, adding the accessories which are frequently used for aqueous agent into the mixture, detecting and adjusting the pH of the solution, and finally forming the nasal cavity drop, wherein the weight ratio of the calcium phosphate nano particles to the exenatide in the compound is 1-10:0.1-10, and the content of the diluted exenatide in the solvent is 0.01 to 0.5 milligram per milliliter.

The invention discloses a method for purifying Exenatide, which comprises the following steps of: 1) dissolving crude peptides obtained by solid phase synthesis with water for injection; 2) conducting gradient elution and purification with the fixed phase being reversed-phase silica gel column of tetraalkylsilane bonded silica, octalkylsilane bonded silica or octadecylsilane bonded silica, and the phase A of a mobile phase being phosphate buffer solution and the phase B of the mobile phase being chromatographic grade acetonitrile, and collecting the peptide solution at a target peak value; and 3) converting the high-purity peptides after purification into acetate by using an anion exchange method. The method which is applicable to the industrialized purification of Exenatide uses reversed phase high-performance liquid chromatography for purifying Exenatide, and uses the anion exchange method for converting the high-purity peptides after purification into acetate, thus not only being capable of obtaining the refined peptides with PLC purity higher than 98.0 percent, but also realizing large-scale production and meeting the requirements of high purity, high yield and industrialization.

The invention discloses a preparation method of solid phase peptide synthesis Exenatide which includes the following steps: taking Rink Amide resins, Rink Amide AM resins or Rink Amide MBHA resins as starting materials, amino acids with Fmoc protective groups are sequentially connected, so as to obtain protective thirty-nine peptide resins; and meanwhile, after thirty-nine peptide resins are obtained by sequentially removing Fmoc-protective groups and transpeptidase reactions by condensing agents, acellular side-chain protective groups and cutting peptides are carried out sychronously to obtain Exenatide crude products, and then products (comprising medical salts and free alkali, such as acetates, trifluoroacetate, etc.) are obtained after Exenatide crude products are separated and purified by C18 or C8 column and freeze-dried. The preparation method has the advantages of stable technology, conventient raw and auxiliary material sources, short production cycle, low production cost, few three wastes, high yield, stable yield, stable quality, low production cost and high yield.

The invention discloses a solid phase synthesis preparation method of exenatide represented by a formula I, wherein a Fmoc-resin and a deprotection agent are mixed to obtain a deprotection resin, a Fmoc-amino acid and a deprotection resin are subjected to condensation to obtain a Fmoc-amino acid-resin, and Fmoc protection removal and condensation of the polypeptides on the Fmoc-amino acid and the resin are repeated to carry out condensation of the amino acid and the polypeptide on the resin according to a C terminal-to-N-terminal sequence to form a polypeptide resin. The method is characterized by comprising the following steps: (1) respectively forming polypeptide resin fragments represented by a formula II and a formula III; (2) cutting the fragment represented by the formula III to obtain a polypeptide fragment with complete side chain protection and represented by a formula IV; (3) conjugating the polypeptide fragment with complete side chain protection and represented by the formula IV to the polypeptide resin fragment represented by the formula II, and removing Fmoc to obtain a polypeptide resin represented by a formula V; (4) sequentially conjugating the remaining 10 Fmoc-amino acids, and removing Fmoc to obtain an exenatide-Rink Amide resin represented by a formula VI; and (5) separating the polypeptide and the resin on the polypeptide resin represented by the formula VI to obtain the exenatide represented by the formula I.

The invention relates to a long-effecting exenatide (Exendin-4) analogue and a synthetic method thereof. The Exendin-4 is modified to obtain the Exendin-4 analogue with longer pharmacologic action time, the synthesis of target polypeptide is quickly realized through an orthogonally protection strategy solid-phase synthesis method, and a crude product is purified and freeze-dried to obtain the Exendin-4 analogue.

The invention provides an exenatide short peptide and imitation peptide, which transforms the structure of exenatide, and is a novel compound. The invention further discloses a preparation process of exenatide short peptide and imitation peptide, which is suitable to be produced in industrialization. The invention further discloses an application on the preparation therapeutic medicaments of diabetes.

The invention belongs to the field of pharmaceutic preparations, and discloses an improved method for preparing exenatide sustained release microspheres and exenatide sustained release microspheres prepared by the method. In the method of the invention, after being dissolved in dichloromethane, a polymer is mixed with methanol solution;after quicker dissolving of the polymer is guaranteed, exenatide or exenatide and protective agent are added, so that the dissolving speed of the exenatide and the polymer is quickened, the contact time of the exenatide with organic solvent and the volatilization loss of solvent in the polymer dissolving process are reduced, and the solubility of the exenatide in oil phase is largely improved. The method improves the drug loading capacity, reduces the degradation of drugs in the preparation process, simplifies the process, and shortens the preparation period.

The invention discloses a polypeptide or protein nanoparticle based on hydrogen-bonded complexation and a preparation method and application thereof. The nanoparticles comprise a polyphenol compound carrier such as tannic acid as a hydrogen bond donor, a polypeptide or a protein drug such as a glucagon-like peptide as a hydrogen bond acceptor 1 analog (exenatide), salmon calcitonin or insulin, etc., and chitosan, polyvinylpyrrolidone or hyaluronic acid, etc. coated on that surface of the particle as stabilizer and/or functional molecule. The nanoparticles of the invention have extremely high encapsulation efficiency and drug loading capacity, and the prepared therapeutic polypeptide or protein drug nanoparticles are suitable for oral delivery or subcutaneous injection application, and havegreat application prospect.

The invention discloses a method for preparing polypeptide solid-phase synthesized exenatide. The method comprises the following steps of: (1) mixing Fmoc-Rink amide AM resin with a protection removing agent to obtain Rink amide AM resin; (2) condensing Fmoc-Ser(tBu)-OH and the Rink amide AM resin to obtain Fmoc-Ser(tBu)-Rink amide AM resin; (3) repeating the Fmoc protection removal in the step (1) and condensation of amino acid and polypeptide on the resin in the step (2) according to a solid-phase synthesis method and condensing the amino acids from C end to N end and the polypeptide on the resin in the sequence of Ser to His to form the polypeptide resin shown as the formula II; and separating the polypeptide and resin on the polypeptide resin shown as the formula II to obtain the exenatide shown as the formula I.

The invention discloses a method for low-cost purification of exenatide. The method comprises the steps of firstly, performing initial purification on a large quantity of exenatide crude products by using a strong cation exchange column by adopting an efficient liquid phase chromatography so as to remove most of impurities in the exenatide crude products and provide convenience for refining purification from two aspects of quality and quantity, then performing desalination by using a reverse phase polymer column, and then performing refining purification by using a C18 reverse phase silica gel column. By adopting the method, the production cost is reduced, the exenatide with the concentration of more than 98% can be obtained, and the requirements of low cost, high yield and industrialization for purifying exenatide can be met.