139 results about "Daptomycin" patented technology

Active medicine daptomycin is mixed with certain amount of sodium hydroxide and pH regulator, the mixture is compounded with injection water to form solution in certain concentration, and the solution is filled into antibiotic bottle and freeze dried for 30-60 hr to prepare loose and water soluble freeze dried preparation. The freeze dried daptomycin preparation for injection has excellent medicine stability and convenience in carrying and clinical application. The preparation is used specially for intravenous injection to treat skin infection with resistance to other antibiotics.

The invention provides methods for administering a therapeutically effective amount of daptomycin while minimizing skeletal muscle toxicity. The methods provide daptomycin administration at a dosing interval of 24 hours or greater. This long dosing interval minimizes skeletal muscle toxicity and allows for higher peak concentrations of daptomycin, which is related to daptomycin's efficacy. The invention also provides methods of administering lipopeptide antibiotics other than daptomycin while minimizing skeletal muscle toxicity by administering a therapeutically effective amount of the lipopeptide antibiotic at a dosage interval that does not result in muscle toxicity. The invention also provides methods of administering quinupristin/dalfopristin while minimizing skeletal muscle toxicity by administering a therapeutically effective amount of quinupristin/dalfopristin at a dosage interval that dos not result in muscle toxicity.

The invention discloses a purification and preparation method of high-purity Daptomycin, which comprises the following steps of compounding a buffer solution and coarse Daptomycin into a sample solution, absorbing by using composite YT-01reverse phase silica gel columns and carrying out gradient elution or constant elution with the water solution of a strong polar solvent, which is used as a resolution agent. The chromatographic purity is higher than 98%.

The present invention relates to crystalline and crystal-like forms of lipopeptides, including daptomycin, a lipopeptide antibiotic with potent bactericidal activity against gram-positive bacteria, including strains that are resistant to conventional antibiotics. The present invention relates to methods of purifying lipopeptides, including daptomycin, a lipopeptide antibiotic with potent bactericidal activity against gram-positive bacteria, including strains that are resistant to conventional antibiotics. The present invention also relates to pharmaceutical compositions comprising the purified form of the lipopeptide and methods of using these compositions.

The invention discloses a streptomyces parvus and application thereof for preparing daptomycin. The strain is reserved in the CCTCC and has the reservation number of CCTCC NO: M2010136, and the reservation data is June 4, 2010. The method for preparing the daptomycin is as follows: a, taking streptomyces parvus CCTCC NO: M2010136 as a fermentation strain; b, strain cultivation: inoculating slope lawn into a shake flask seeding tank to cultivate to obtain shake flask seeding liquid; inoculating the shake flask seeding liquid into the seeding tank to be cultivated; inoculating the seeding tank culture solution into fermentation tank culture medium to be cultivated, and collecting fermentation liquor; carrying out feed supplement in the fermentation and cultivation process; and c, extracting a fermentation product. The fermentation technology provided by the invention has stable production capability, high fermentation unit and few fermentation byproducts by the pilot plant test and the experiment in a 10-ton fermentation tank, greatly lowers post-extracting difficulty and is suitable for industrial production.

The present invention provides compositions and methods for prevention, amelioration and treatment of gram positive bacteria, particularly Staphylococcal bacteria, with combinations of lysin, particularly Streptococcal lysin, particularly the lysin PlySs2, and one or more antibiotic, including daptomycin, vancomycin, oxacillin, linezolid, or related antibiotic(s).

The invention provides a method for separating and purifying daptomycin. The method overcomes the defects of the exiting extraction technology of the daptomycin, the purity of the daptomycin is improved, and the final purity of the daptomycin reaches higher than 99.2, so a method capable of industrially purifying the daptomycin is provided.

The invention provides a preparation method of high-purity Daptomycin, which comprises the steps of: first removing mycelium, soluble protein, culture medium, partial pigments and the like from fermented liquid by adopting primary membrane filtration; then concentrating by a secondary membrane filtration system to remove some micromolecular impurities like monosaccharide and a large number of inorganic salts so as to result in clarified Daptomycin concentrated solution; and then causing the clarified Daptomycin concentrated solution to be subject to chromatography of cation exchange resin and neutralization of anion exchange resin as well as nanofiltration membrane concentration and normal reduced pressure concentration in order to obtain high-purity Daptomycin by means of crystallization. Based on the comprehensive usage of membrane separation technology and resin chromatography technology, the invention provides a production-feasible and operationally-easy method for preparing high-purity Daptomycin.

The invention discloses a method for purifying daptomuycin. According to the method, half-purified daptomuycin is loaded on a gel type weak anion resin for combination at first and is eluted the next. The purification method provided in the invention enables obtained daptomuycin to have purity higher than 98%; the raw materials used in the method are easily available and cheap; therefore, it is easy to popularize and apply the method.

The invention discloses an extraction method for daptomycin. The method comprises the following steps of: forming micelles from daptomycin in fermentation solution and filtering the micelles via a ceramic membrane system at first; then performing separation and purification by virtue of a multi-section macroporous adsorption resin separation system and a weak-base anion-exchange resin separation system; and finally concentrating and freeze-drying to obtain a daptomycin solid having a chromatographic purity of greater than 96%. The method disclosed by the invention is simple and practicable, low in cost, and suitable for industrialized production.

The invention discloses an extraction and purification method of daptomycin.. The method comprises the following steps: enriching daptomycin in a fermentation broth; and performing crude extraction and refining on the enriched daptomycin; and finally lyophilizing to obtain daptomycin, wherein acidic column chromatography and neutral column chromatography are sequentially adopted in the crude extraction; and neutral column chromatography and acidic column chromatography are sequentially adopted in refining. By virtue of improvement of the extraction and purification method, massive pigment generated in the fermenting process, homologous compounds, isomers and other side products with similar structure to the daptomycin can be well removed. The final product which is subjected to extraction and purification has high purity; in addition, the process is simple and is suitable for industrial production.

Long term storage stable daptomycin-containing compositions are disclosed. The compositions include daptomycin or a pharmaceutically acceptable salt thereof at a concentration of less than or equal to about 25 mg/mL, a buffer having an acidic functional group and have a pH of from about 6.0 to about 7. The formulations are surprisingly free of degradation products such as the hydrolysis product of daptomycin and the β-isomer of daptomycin after storage periods of at least about 18 months.

The invention discloses a method for separating and purifying daptomycin. The method comprises the steps of allowing daptomycin to form micelles, filtering by a ceramic membrane system, performing separation and purification and discoloring treatment by using a weak-base anion exchange resin separating system and a macroporous resin separating system, crystallizing, and thus a daptomycin solid with a chromatographic purity higher than 98% is obtained. The method is simple and practicable, is low in cost, and is suitable for industrialized production.

The invention provides a daptomycin purifying method. Specifically, the method comprises the steps that firstly, fermentation liquor is clarified and then is separated by macro-porous adsorption resin and anion exchange resin, then nanofiltration concentration is adopted to remove endotoxin, and desalination, concentration, filtration and the like are performed to obtain high-purity daptomycin, wherein macro-porous adsorption resin separation and anion exchange resin separation can be exchanged in step sequence. The product obtained by the adoption of the daptomycin purifying method is high in purity and contains few impurities, and operation is simple.

A method for extracting daptomycin from fermentation broth relates to fermentation broth. Supernatant liquor is obtained after the fermentation broth is centrifuged, the daptomycin enters an organic phase after the supernatant liquor is extracted by an organic solvent, sodium acetate-acetic acid buffer solution is used to perform re-extraction to reach a water phase so as to obtain strip-extraction liquid, the strip-extraction liquid is purified through hydrophobic interaction chromatography, isopropanol-sodium acetate-acetic acid buffer solution with constant intensity is used for elution to obtain hydrophobic interaction chromatography eluent, the eluent is separated and purified through ion-exchange column chromatography to obtain ion-exchange eluent, the sodium acetate-acetic acid buffer solution is used as basic liquid, and neutral salt is added for elution so as to complete extraction of the daptomycin from the fermentation broth. Organic solvent extraction and resin chromatography technology is applied comprehensively, and the daptomycin with purity more than 85% can be separated and purified from the fermentation broth by using the method. Compared with other separating and purifying technology, the method is moderate in operating condition, low in cost and capable of effectively reducing acidolysis of the daptomycin. The daptomycin serving as novel lipopeptide antibiotics has good medical market prospect.

A therapeutic combination comprises an antibacterially effective amount of daptomycin, and an amount of protein synthesis inhibitor antibiotic effective to prevent the development of daptomycin non-susceptibility in bacteria. Related combination therapies and methods are also included.

The present disclosure provides novel powder daptomycin formulations which have improved chemical stability and faster reconstitution times when in the solid state. Some examples of the compositions comprise daptomycin and sucrose.

A method for the synthesis of daptomycin or a daptomycin analogue is carried out on a resin to form a linear precursor followed by a serine ligation macrocyclization in solution. Daptomycin analogues can differ from daptomycin by substitution of amino acids residues and/or deletion or addition of amino acid residues. Daptomycin analogues can include a different fatty acid in the side arm of the daptomycin analogue.

The invention relates to a daptomycin synthesis method for resolving the technical problem of prior art which uses rose spore streptomycete as raw material to cost high synthesis cost. The synthesis method comprises a, using 2-chlorine trityl chloride resin as carrier, via solid synthesis method to connect the amino acids with protective groups, to obtain protective decapeptide resin while the Fmoc-protective groups are removed in turn, B, connecting decanoic acid via same method, connecting next amino acid via esterification, removing Fmoc-protective groups, and connecting left two amino acids via normal solid method, removing Fmoc-protective groups, c, using trifluoroacetic acid or carrene solution to cut off total protective peptide from resin, drying and completing end-to-end liquid cyclisation in organic solvent, d, using the mixture of trifluoroacetic acid, water and benzene methyl sulfide to cut off peptide from resin to obtain crude product. The invention can synthesize daptomycin.

The invention relates to a method for fermenting daptomycin by adding caprate. In the fermentation tank culturing process, the daptomycin is produced by adding 5.0 percent potassium decanoate solution, 10.0 percent sodium decanoate solution or 8.0 percent ammonium decanoate solution, namely the decanoates are used as precursors for fermenting the deptomycin. The method has the advantages that: while the daptomycin fermenting path is enlarged, the adding effect can be ensured because the precursors have small toxicity to cells, can exist in a liquid form at normal temperature and cannot easily crystallize due to low temperature.

The invention relates to a method for enriching and extracting daptomycin from a fermentation broth. The method comprises the following steps: enriching the datomycin-containing fermentation broth through HZ-818 macro-porous resin, desorbing the enriched daptomycin from the macro-porous resin, performing vacuum concentration on the obtained daptomycin desorption solution, and performing precipitation crystallization by using a chemical solvent to obtain crude daptomycin; and loading the crude daptomycin into a low-pressure resin chromatography column containing a PS-RPC-300 polymer nanospherepacking material, performing chromatographic separation, performing distribution concentration to obtain a datomycin mother liquor having a purity of 97.5% or more, and performing vacuum concentration, activated carbon decolorization, precipitation crystallization and freeze drying on the mother liquor to obtain pure daptomycin having a purity of 98%. The method is simple, and the process flow issuitable for mass production.