WO2013159411A1 - 银杏内酯注射液及其制备方法 - Google Patents

银杏内酯注射液及其制备方法 Download PDF

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WO2013159411A1
WO2013159411A1 PCT/CN2012/075631 CN2012075631W WO2013159411A1 WO 2013159411 A1 WO2013159411 A1 WO 2013159411A1 CN 2012075631 W CN2012075631 W CN 2012075631W WO 2013159411 A1 WO2013159411 A1 WO 2013159411A1
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Prior art keywords
injection
ginkgolide
ginkgolides
test
solution
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PCT/CN2012/075631
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English (en)
French (fr)
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孙毅
朱永红
童正兵
王婕
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成都百裕科技制药有限公司
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Priority to SG11201405423PA priority Critical patent/SG11201405423PA/en
Publication of WO2013159411A1 publication Critical patent/WO2013159411A1/zh

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/0012Galenical forms characterised by the site of application
    • A61K9/0019Injectable compositions; Intramuscular, intravenous, arterial, subcutaneous administration; Compositions to be administered through the skin in an invasive manner
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/33Heterocyclic compounds
    • A61K31/335Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
    • A61K31/365Lactones
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00Drugs for disorders of the nervous system
    • A61P25/28Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P29/00Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P37/00Drugs for immunological or allergic disorders
    • A61P37/08Antiallergic agents
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P7/00Drugs for disorders of the blood or the extracellular fluid
    • A61P7/02Antithrombotic agents; Anticoagulants; Platelet aggregation inhibitors
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00Drugs for disorders of the cardiovascular system
    • A61P9/10Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis

Definitions

  • the invention relates to a preparation method of a traditional Chinese medicine preparation, in particular to a ginkgolides injection and a preparation method thereof, and belongs to the field of medicine.
  • Ginkgo biloba leaves Since the 1960s, many countries have used modern separation techniques to study the chemical constituents of Ginkgo biloba leaves. Through pharmacological experiments and clinical verification, it has been found that the multi-faceted biological activities of Ginkgo biloba leaves are related to the specific chemical components contained therein. Germany's Dr. Willar Schwabe first registered a simple extract of Ginkgo biloba, and in 1972 applied for a special treatment (W Schwabe DE 176708 and DE 2117429), named EGb761, for the treatment of cardiovascular and cerebrovascular diseases and the nervous system. Disease, with significant efficacy, and no toxic side effects, ginkgolids have strong platelet activating factor (PAF) antagonism. Ginkgo biloba is listed as a therapeutic drug in Germany, France, and China. In other countries, it is used as a health food or over-the-counter. Ginkgo health food developed in the United States has been approved by the FDA.
  • PAF platelet activating factor
  • Ginkgolides are terpenoids, called terpene lactones, composed of sesquiterpene lactones and diterpene lactones, and are an important active ingredient in ginkgo leaves.
  • the bilobalide is a sesquiterpene lactone, which was isolated by R.T. Major in 1967 and KWeinges in 1969. It is the only sesquiterpene lactone compound currently found in ginkgo leaves.
  • Ginkgolides A, B, C, M, J are diterpene lactone compounds, which were first separated from Ginkgo biloba leaves by S. Furukawa in 1932, only in 1967. K. Nakanish, M. Mamyama, K.
  • the ginkgolide molecular skeleton consists of 15 carbon atoms and has four five-membered rings fused together, one of which has five five-membered carbon rings and three five-membered lactone carbon rings. There is a rare tert-butyl group in the natural ring.
  • Ginkgolide has a strong biological activity and promotes nerve growth. It prevents functional changes caused by mitochondrial oxidative stress in brain cells, improves memory function in the elderly, prevents the occurrence of senile dementia, and prevents demyelination of brain and spinal cord nerves. Its role in neurotrophic and neuroprotective effects is stronger than that of ginkgolides.
  • Ginkgolide B has anti-inflammatory, anti-shock, protects cardiovascular and cerebrovascular, and treats acute pancreatitis.
  • the molecular skeleton of the ginkgolide compound consists of 20 carbon atoms and has six five-membered rings, of which two five-membered carbon rings, three five-membered lactone rings, one tetrahydrofuran ring, and two five-membered carbons. The rings are connected together in the form of a spiro ring, and the remaining rings are joined in a fused manner to form a special three-dimensional chemical structure with a rigid braid.
  • Both ginkgolide molecules have a tert-butyl group which is rare in natural products.
  • Ginkgolides include diterpenoids and sesquiterpenoid lactones, diterpene lactones mainly include ginkgolides A, B, C, J, M, etc. Semiquinone lactones have ginkgolides.
  • ginkgolide is a potent platelet-activating factor antagonist, protective against the immune system, central nervous system, and ischemic injury, and It has anti-shock, anti-allergy and anti-inflammatory effects.
  • the structure of ginkgolides VIII, B, C, M, J differs in the number of hydroxyl groups contained and the positions at which the hydroxy groups are attached.
  • Ginkgolide is a strong platelet activating factor antagonist and a key component of special physiological activity in Ginkgo biloba leaves.
  • Ginkgolide C structural ginkgolide structural formula: C 2Q H 24 O u Molecular weight: 440.4 Molecular formula: C 15 H 18 0 8 Molecular weight: 326.3
  • PAF platelet activating factor
  • Ginkgolide has a strong specific inhibitory effect on the platelet activating factor PAF receptor, among which Ginkgolide has the highest anti-PAF activity.
  • PAF is an endogenous phospholipid secreted by platelets and various inflammatory tissues. It is the most effective inducer of platelet aggregation discovered so far, and it is closely related to the occurrence and development of many diseases.
  • Ginkgolide is currently considered to be the most promising natural PAF receptor antagonist, and its antagonistic activity is closely related to chemical structure.
  • R3 is a hydroxyl group or the number of hydroxyl groups is increased in the lactone structure, the antagonistic activity against PAF is weakened, and when R2 is a hydroxyl group and R3 is H, the activity is remarkably enhanced, and the antagonism of ginkgolides B on PAF is most. Strong.
  • ginkgolides The determination of ginkgolides is currently carried out by HPLC-UV, HPLC-MS and HPLC-ELSD. These methods can only measure the content of various components of ginkgolides, due to the lack of strict control of harmful substances in their products. , can not truly reflect the quality characteristics of drugs, does not form a sound drug quality control system.
  • meglumine or sodium hydroxide is used as a cosolvent, since ginkgolides are in a unique five-membered ring.
  • the structure, under alkaline conditions, can lead to the opening of the lactone and lose the efficacy of the drug, which inevitably brings a huge safety hazard to the clinical drug.
  • the present invention is intended to provide a ginkgolide injection having an excellent production process and a strict quality control method.
  • ginkgolide is a fat-soluble substance, it is almost insoluble in water.
  • the highly safe pharmaceutical excipients such as ethanol and glycerin are used as the co-solvent of the present invention, and the proportion of the co-solvent is strictly controlled between 1:1 and 5:1.
  • the structure of the lactone does not change, effectively solving the solubility problem of the drug.
  • citric acid or hydrochloric acid as the pH adjuster can make the drug more stable, avoiding the crystallization of the drug during the process, resulting in unqualified clarity and insoluble particles. , to solve the safety hazards of clinical use.
  • the technical problem solved by the present invention is to provide a ginkgolide injection solution, which has the advantages of clear components and fixed ratio, and effectively removes macromolecules and proteins, thereby avoiding occurrence of adverse reactions.
  • the active ingredient of the injection of the invention is high-purity, clear component and fixed ratio of ginkgolides, the effective part content is above 95%, and the four components containing bilobalide (C 15 H 18 0 8 ) is 25.0. % ⁇ 50.0%, Ginkgolide A (C 20 H 24 O 9 ) is 20.0 ⁇ 45.0 Ginkgolide B (C 20 H 24 Oio) is 10.0 ⁇ 30.0 Ginkgolide C (C 20 H 24 Oii ) is 5.0% ⁇ 15.0%.
  • the ginkgolide injection of the present invention contains the following ingredients:
  • Ginkgolide (based on terpene lactone) l-10mg/ml (preferably 5mg/ml)
  • Sweet oil 0.2-0.5ml/ml (preferably 0.4ml/ml)
  • the volume ratio of the cosolvent is strictly controlled between 1:1 and 5:1, that is, the volume ratio of ethanol to glycerol is 1 to 5 parts of ethanol and 1 part of glycerin.
  • the preferred prescription is as follows:
  • Ginkgolide (based on terpene lactone) 10g
  • the ginkgolide injection of the present invention contains the following components:
  • Ginkgolide (based on terpene lactone) 5mg/ml
  • the volume ratio of the cosolvent is strictly controlled between 1:1 and 5:1, that is, the volume ratio of ethanol to glycerol is 1 to 5 parts of ethanol and 1 part of glycerin.
  • the preferred prescription is as follows: Ginkgolide (based on terpene lactone) 10g
  • the ginkgolide injection of the present invention contains the following components per milliliter:
  • Ginkgolide (based on terpene lactone) 5mg/ml
  • Ethanol has good mutual solubility with glycerin and water for injection.
  • the solution has good stability after mixing. As a solvent, it can maintain the original chemical structure of the drug, which is beneficial to human body absorption and exerts drug efficacy.
  • Ginkgolide has good solubility in ethanol, but it is very irritating to humans with ethanol as a solvent for injection. Therefore, diluting ethanol with glycerin and a small amount of water for injection can effectively alleviate pain during intravenous injection. The body's tolerance to ethanol does not alter the solubility of the solution to the drug and the stability of the solution.
  • the preparation method of the ginkgolide injection of the invention is as follows:
  • the quality control method of the injection of the invention comprises:
  • the pH 3.0 ⁇ 4.5.
  • the pH is from 3.2 to 3.8.
  • Solution color less than yellow standard colorimetric solution No. 4 (Chinese Pharmacopoeia).
  • Tannin, resin, oxalate, potassium ion Do not detect.
  • Abnormal toxicity 0.2 mg solution per lml is prepared, which is administered by intravenous injection.
  • Pyrogen The dose is 5 ml per 1 kg of rabbit body weight (Chinese Pharmacopoeia).
  • Hemolysis and coagulation 6 ml of the injection of the present invention was added and diluted in 100 ml of 0.9% sodium chloride injection, and the test was passed (Chinese Pharmacopoeia).
  • Allergy test Take the injection of the present invention, and add 0.9% sodium chloride injection to dilute to 0.4%/ml of terpene lactone. Intravenous injection of the test solution for 30 minutes, no allergic reaction.
  • Irritation test Take the injection of the present invention diluted with 0.9% sodium chloride injection into a concentration of 0.5 mg / ml solution, take 3 rabbits, male and female, weighing, daily rabbit ear right ear vein infusion The test solution was supplied at 10 ml/kg, and an equal volume of 0.9% sodium chloride injection was instilled into the left ear margin for 3 times. Before each dose and 1, 6 hours after the dose and at the end 48 hours after the administration, the blood vessels at the injection site were visually observed for symptoms such as hyperemia, hemorrhage, and necrosis.
  • the rabbits were sacrificed by carotid artery bleeding, 1 cm from the proximal end of the needle, and the ear edge was cut 2 cm, FAA solution was fixed, conventional dehydration, paraffin-embedded section, HE staining, Pathological examination of vascular tissue under a light microscope was performed to determine whether it was irritating. Intravenous infusion of the test article, no vascular irritation.
  • Total Ginkgoic Acid Column C18, mobile phase: methanol-1% glacial acetic acid (90: 10), detection wavelength 310 nm.
  • the total ginkgolic acid content was calculated to be no more than 1 ppm by the external standard method of ginkgo acid.
  • Fingerprint Column C18, mobile phase: methanol-tetrahydrofuran-water (25:10:65), evaporative light scattering detector, drift tube temperature: 105 ° C, carrier gas flow rate: 3.00 IJmin, column temperature: 40 ° C
  • the fingerprints of the test samples are shared by four The similarity between the peak and the control fingerprint is greater than 0.95.
  • Sterile Dilute and filter with 0.9% sterile sodium chloride solution by membrane filtration method, and wash the filter 3 times with 0.9% sterile sodium chloride solution, and sterilize qualified (Chinese Pharmacopoeia).
  • Ginkgolide injection has the effect of promoting blood circulation and removing blood stasis.
  • the injection solution of the invention adopts high purity, clear component and fixed proportion of ginkgolides, and the effective part content is above 95%, wherein the four components containing bilobalide (C 15 H 18 0 8 ) are 25.0% ⁇ 50.0%.
  • Ginkgolide A (C 20 H 24 O 9 ) is 20.0 ⁇ 45.0
  • Ginkgo biloba B (C 2 oH 24 Oio) is 10.0 ⁇ 30.0
  • Ginkgo biloba C (C 2 oH 24 Oii ) is 5.0 ⁇ 15.0
  • the total ginkgolic acid is less than 5ppm, which meets the requirements of the European Union.
  • the whole production process ensures the stable ratio and clinical efficacy of the terpene lactone component, and applies gel chromatography and liquid chromatography-mass spectrometry to the detection field, which solves the macromolecular substances, polymers and proteins in the traditional Chinese medicine injection production process.
  • the residuals greatly reduce the occurrence of adverse reactions, and the four common peak similarities of the fingerprints are greater than 0.95.
  • the effective co-solvent-ethanol-glycerol mixed solvent was screened out, which solved the technical problems of the conventional process and avoided the use of other acid-alkaline excipients to cause the ring closure of ginkgolide and destroy the main component.
  • the structure makes the active ingredient more stable and at the same time achieves the sterility requirements of the injection.
  • the quality control index controls the product quality from multiple angles and comprehensively, and effectively establishes a perfect impurity control method. It adopts the most stringent detection of traditional Chinese medicine injections such as fingerprint, abnormal toxicity, irritancy test, hemolysis and coagulation, and allergy test.
  • the technology controls the quality of the products and greatly improves the safety of clinical use.
  • the quality control technology has far surpassed the internationally recognized Ginkgo biloba extract injection, which has reached the international advanced level.
  • the invention is an effective part traditional Chinese medicine injection, effectively removes macromolecules and proteins, avoids the occurrence of adverse reactions, and has the characteristics of low energy consumption, exact curative effect, simple operation, easy control of quality, low production cost, etc., compared with other ginkgo bilobas. Injections are safer.
  • Figure 1 01 batch of ginkgolide injection LC-MS diagram (molecular weight 400 ⁇ 1000).
  • Figure 7 Diagram of the linear relationship of ginkgo acid.
  • peak peaks 2 ginkgolides C
  • peak 3 bilobalide
  • peak 4 ginkgolides A
  • peak 5 ginkgolides 8.
  • the raw material ginkgolide of the present invention contains ginkgolide (C 15 H 18 0 8 ) 25.0 ⁇ 50.0 ginkgolide A (C 20 H 24 O 9 ) 20.0 ⁇ 45.0 ginkgolide B (C20H24O10) 10.0 ⁇ 30.0 ginkgolide C (C 20 H 24 O u ) 5.0% ⁇ 15.0%, and the total amount of ginkgolide, ginkgolides, ginkgolides 8, and ginkgolide C is greater than 95%.
  • Test 1 Take 1200ml of ethanol and 800ml of glycerin, mix well, add 10g of ginkgolides, stir to dissolve, adjust the pH to 3.2 ⁇ 3.8, after passing the intermediate test, filter to clear, potting and sterilize.
  • Test 2 Take 400ml of ethanol and 1600ml of glycerin, mix well, add 10g of ginkgolide, stir to dissolve, adjust the pH to 3.2 ⁇ 3.8, after passing the intermediate test, filter to clear, potting and sterilize.
  • Test 3 Take 300 ml of ethanol and 1700 ml of glycerin, mix well, add 10 g of ginkgolide, stir to dissolve, adjust the pH to 3.2 ⁇ 3.8, after passing the intermediate test, filter to clear, potting and sterilize.
  • Test 4 Take 1200ml of ethanol and 400ml of glycerin, mix well, add 10g of ginkgolides, stir and dissolve, add water for injection to 2000ml, adjust the pH to 3.2 ⁇ 3.8, after passing the intermediate test, filter to clear, potting, sterilization .
  • Test 5 Take 400ml of ethanol and 1000ml of glycerin, mix well, add 10g of ginkgolides, stir and dissolve, add water for injection to 2000ml, adjust the pH to 3.2 ⁇ 3.8, after passing the intermediate test, filter to clear, potting, sterilization .
  • pH regulator Since ginkgolides are relatively stable under weakly acidic conditions, they are screened with 5 ⁇ 10% citric acid solution or 1 ⁇ 10% hydrochloric acid solution respectively.
  • Test 1 Take 1200 ml of ethanol and 800 ml of glycerin, mix well, add 10 g of ginkgolides, stir to dissolve, adjust the pH to 3.2 ⁇ 3.8 with 5% hydrochloric acid, and after passing the intermediate test, filter to clear, potting and sterilize.
  • Test 2 Take 400 ml of ethanol and 1600 ml of glycerin, mix well, add 10 g of ginkgolides, stir to dissolve, adjust the pH to 3.2 ⁇ 3.8 with 10% hydrochloric acid, and after passing the intermediate test, filter to clear, potting and sterilize.
  • Test 3 Take 1200ml of ethanol and 400ml of glycerin, mix well, add 10g of ginkgolides, stir to dissolve, add water for injection to 2000ml, adjust the pH to 3.2 ⁇ 3.8 with 10% citric acid solution, after passing the intermediate test, filter to Clarity, potting, sterilization.
  • Test 4 Take 1200ml of ethanol and 800ml of glycerin, mix well, add 10g of ginkgolides, stir to dissolve, adjust the pH to 3.2 ⁇ 3.8 with 10% citric acid solution, after passing the intermediate test, filter to clear, potting, extinction bacteria.
  • the pH adjuster in this product can be used 5 ⁇ 10% citric acid solution or 1 ⁇ 10% hydrochloric acid solution, and the pH is adjusted with hydrochloric acid solution, which is slightly increased after sterilization, but the change is not big, ⁇ Tannic acid is a weak acid and the pH is more stable.
  • hydrochloric acid and citric acid can be used as solution pH adjusters.
  • Test Example 1 Determination of quality control content of ginkgo lactone
  • Preparation of the reference solution accurately weigh the reference of bilobalide, ginkgolides A, ginkgolides B, ginkgolides C, and add methanol to dissolve and quantify to make each 1ml separately. A mixed solution of 0.15 mg, 0.12 mg, 0.1 mg, and 0.1 mg was shaken to obtain. Preparation of the test solution: Take 6mg of ginkgolides, accurately weighed, add 10ml of methanol to the 10ml volumetric flask, add the mobile phase to the mark, shake well, that is.
  • Determination method accurately draw the reference solution 10 ⁇ 1, 20 ⁇ 1 and the test solution 10 ⁇ 20 ⁇ 1, inject high-performance liquid chromatograph, record the chromatogram, calculate the ginkgolide and ginkgolides by the two-point logarithmic equation of external standard The content of bismuth, ginkgolides and ginkgolides C is obtained.
  • Test Example 2 Quality control of ginkgolide injection-related substance inspection
  • Protein 2 ml of the injection of the present invention was taken, and 50 ml of water was added to prepare a test solution. Weigh about 50mg of Coomassie Brilliant Blue G-250, dissolve it in 25ml of ethanol, add 85% (w/v) of phosphoric acid 50ml, dilute with water to 500ml, shake well, filter, accurately measure 5ml of filtrate into test tube, then Add 1 ml of the test solution to the test solution, shake well, and place for 3 min. The same method is used as a blank, and the absorbance is measured at a wavelength of 595 nm, and the absorbance of the test solution is less than 0.05.
  • Tannin Take 1 ml of the injection of the present invention, add 1 drop of dilute acetic acid, add 5 drops of gelatin sodium chloride test solution, shake well, and leave for 10 minutes, no turbidity or precipitation.
  • Oxalate Take 2ml of the injection of the invention, adjust the pH to 1 ⁇ 2 with dilute hydrochloric acid, filter, adjust the pH of the filtrate with ammonia water to 5 ⁇ 6, add 3 drops of 3% calcium chloride solution, place After 10 minutes, no turbidity or precipitation occurred.
  • test solution The injection of the present invention and sodium chloride injection were used to prepare a solution containing 0.2 mg per 1 ml.
  • Examination method 5 mice weighing 17 ⁇ 20g were injected into the tail vein of the mice for 0.5ml, and there was no death within 48 hours.
  • test solution Take 2 ml of the injection of the present invention, add it to 50 ml of 0.9% sodium chloride injection, and shake well. Examination method: Take 3 rabbits, and within 15 minutes after measuring their normal body temperature, inject 5 ml of the rabbit's body weight into the ear vein and slowly inject the test solution, and measure the body temperature once every 30 minutes for 6 times. The increase in body temperature should be less than 0.6 °C, and the sum of the body temperature of the three rabbits is less than 1.3 °C.
  • test solution 6 ml of the injection of the present invention was taken, and added to 100 ml of 0.9% sodium chloride injection and shaken. Inspection method: Take 5 clean glass test tubes, No. 1, No. 2 tube for the test tube, No. 3 tube for the negative control tube, No. 4 tube for the positive control tube, and No. 5 tube for the test tube. 2% red blood cell suspension, 0.9% sodium chloride solution, and distilled water were sequentially added as shown in Table 3. After mixing, they were immediately incubated at 37 ° C ⁇ 0.5 ° C in an incubator.
  • test solution addition amount is shown in Table 3.
  • Table 3 Hemolysis and coagulation test solution
  • the solution in the test tube is clear red, there is no cell residue at the bottom or a small amount of red blood cells remaining, indicating hemolysis occurs; if the red blood cells are all sinking, the supernatant is colorless and clear, or the supernatant is clear, but 1, 2. There was no significant difference in the visual observation of the No. 5 tube, indicating that no hemolysis occurred. If there is a brownish red or reddish brown flocculent precipitate in the solution, it will not disperse after gently inverting 3 times, indicating that red blood cell agglomeration may occur.
  • Test Example 6 Ginkgolide injection quality control of a large molecule and polymer inspection
  • Ultrapure water is produced using the Millipore-Q ultrapure water system.
  • Sample source Ginkgolide injection, lot number 100501, 100502, 100503, specifications are: 2ml.
  • a 0.71% (containing 0.02% sodium azide) sodium sulfate solution was selected as the mobile phase.
  • a universal detector refractive index detector is used, which has a good response to substances with different refractive index differences.
  • ginkgolides A molecular weight 408.5
  • ginkgolides were detected.
  • ginkgolides B (molecular weight 424.4) and ginkgolides C (molecular weight 440.4) are exactly the same as the molecular weight of the active component of ginkgolides. Since the molecular weight range is between 400 and 1000 and 400-3000, respectively, the molecular weight of ginkgo lactone is not 326.3) In the test, no more than 700 molecular weight substances were detected in the injection solution of the present invention, and other trace low molecular weight substances existed, which did not affect the quality of the injection of the present invention, and the molecular weight of different components in the ginkgolide was tested by LC-MS. , indicating that this product does not contain macromolecules or polymers.
  • the molecular weight ranges of the three batches of ginkgolides injection were between 400 and 1000 and between 400 and 3000, respectively.
  • the LC-MS spectra are shown in Figures 1 to 6.
  • Chromatographic conditions and system suitability test octadecylsilane bonded silica as a filler; methanol-1% glacial acetic acid (90: 10) as mobile phase; flow rate l.Oml / min; detection wavelength is 310nm.
  • the number of theoretical plates should be no less than 4000 according to the new acid peak of ginkgo.
  • Preparation of reference solution Take appropriate amount of ginkgo biloba reference substance, accurately weighed, add methanol to make 5 ⁇ ⁇ solution per lml as reference solution; take appropriate amount of total ginkgolic acid reference substance, accurately weigh, add methanol Including 100 ⁇ per lml ⁇ The solution was used as a control solution for localization.
  • test solution Take 1 ml of the injection of the invention, dilute to 10 ml with water, shake well, extract with n-hexane for 3 times (20 ml, 15 ml, 15 ml), combine the n-hexane solution, and evaporate on a water bath, and add the residue. The methanol was dissolved and diluted to 2 ml, and shaken to obtain a test solution.
  • Determination method Precision extraction of the test solution, the reference solution and the positioning control solution for each 20 ⁇ 1, into the liquid chromatograph, calculate the total peak area of the corresponding chromatographic peak of the test solution and the total ginkgolic acid reference substance, to the new ginkgo The total ginkgolic acid content was calculated by the acid standard external standard method. Contains total ginkgolic acid below lppm.
  • Preparation of the reference solution Take the ginkgo acid reference substance, add methanol to make 0.104mg of solution containing ginkgo acid per lml, as the reference solution (1); Precisely measure the reference solution (1) 0.5ml and set the amount of 100ml In a bottle, dilute to the mark with methanol, shake well, and use as a reference solution (2).
  • Assay method accurately measure the reference solution (1) 2.5 ⁇ 1, 5 ⁇ 1, 10 ⁇ 1, 20 ⁇ 1 and the reference solution (2) ⁇ , and inject into the liquid chromatograph, and record the chromatogram under the above chromatographic conditions.
  • the test results are shown in Table 5.
  • test results show that the amount of new acid injection of ginkgo is between 5.2 ⁇ 2080ng, and the injection volume has a good linear relationship with the peak area.
  • Determination method Precisely measure the reference solution (2) 5 ⁇ 1 and 2 ⁇ 1 under linear test, inject into the liquid chromatograph, record the chromatogram, calculate the limit of quantitation and detection limit of ginkgo acid, and the limit of quantification of ginkgo acid is 2.24ng.
  • the detection limit is 0.69ng.
  • the peak area RSD value of the reference solution was 0.35%, and the test results showed that the precision was good.
  • Preparation of reference solution Accurately weigh the ginkgo biloba acid control substance 5.03mg into a 10ml volumetric flask, add methanol and dilute to the mark, shake well, as a reference solution.
  • Preparation of the test solution Take 9 parts of the injection of the present invention, add 1.6 ml, 2.0 ml and 2.4 ml of the reference solution to each of the 3 portions, shake well, and extract 3 times (20 ml, 15 ml, 15 ml) with n-hexane, and combine The n-hexane extract was evaporated to dryness on a water bath, and the residue was dissolved in chloroform and diluted to 2 ml, and shaken to obtain a test solution.
  • Assay method Separately measure the reference solution and the test solution for each 20 ⁇ l. Under the above chromatographic conditions, record the chromatogram and calculate the recovery. The test results are shown in Table 8.
  • the average recovery was 98.04% and the RSD was 1.41%.
  • the test results show that the method of detecting the limit of ginkgolic acid is accurate and guilty.
  • Preparation of reference solution Accurately weigh the lycopene reference substance, ginkgolides A reference substance, ginkgolides B reference substance, ginkgolides C reference substance, and add methanol to make 0.15mg, 0.12 per 1ml respectively. A mixed solution of mg, 0.1 mg, and 0.1 mg was shaken as a reference solution.
  • Preparation of the test solution Precisely take 1 ml of the injection of the invention, add 14 ml of phosphate buffer solution (pH 6.5), shake well, onto an Extrelut-20 column, adsorb for 15 minutes, elute with 100 ml of ethyl acetate, collect Eluent, steam on the water bath Dry, the residue was dissolved in a mobile phase and transferred to a 10 ml volumetric flask, and the mobile phase was diluted to the mark, shaken, and filtered through a 0.45 ⁇ microporous membrane as a test solution.
  • phosphate buffer solution pH 6.5
  • Assay Separately draw 20 ⁇ l of each of the reference solution and the test solution, and inject into the liquid chromatograph to record the chromatogram for 60 minutes.
  • the similarity calculation of the fingerprint of the test sample and the control fingerprint is greater than 0.95.
  • the peak 2 is ginkgolactone C
  • the peak 3 is bilobalide
  • the peak 4 is ginkgolides A
  • the peak 5 is ginkgolides B.
  • Four characteristic peaks in the injection of the invention are There is a one-to-one correspondence in the fingerprint.
  • the fingerprint of the ginkgolide injection control is shown in Figure 8.
  • the fingerprints of 10 batches of ginkgolides injection of the invention have similarities between the four common peaks and the control fingerprints of more than 0.95.
  • Test Example 9 Determination of quality control content of ginkgolides injection
  • Preparation of reference solution Accurately weigh the lycopene reference substance, ginkgolides A reference substance, ginkgolides B reference substance, ginkgolides C reference substance, and add methanol to make 0.15mg, 0.12 per 1ml respectively. A mixed solution of mg, 0.1 mg, and O.lmg was shaken to prepare a reference solution.
  • Preparation of the test solution Precisely take 1 ml of the injection of the present invention, add 14 ml of a phosphate buffer solution (pH 6.5), shake well, and place on an Extrelut-20 column, adsorb for 15 minutes, and elute with 100 ml of ethyl acetate.
  • the eluate was collected, evaporated to dryness on a water bath, and the residue was dissolved in a mobile phase and transferred to a 10 ml volumetric flask.
  • the mobile phase was diluted to the mark, shaken, and filtered through a 0.45 ⁇ microporous membrane as a test solution. .
  • Determination method accurately draw the reference solution 10 ⁇ 1, 20 ⁇ 1 and 15 ⁇ 1 of the test solution, inject high-performance liquid chromatograph, record the chromatogram, calculate the ginkgolide, ginkgolides, ginkgo by the logarithmic equation of the external standard two-point method The content of lactone oxime and ginkgolides C.
  • the injection of the present invention contains ginkgo lactone per 1 ml of ginkgolide (C 15 H 18 0 8 ), ginkgolides A (C 2 oH 24 0 9 ), ginkgolides B (C 20 H 24 Oio) and The total amount of ginkgolides C (C 20 H 24 Oii ) is from 1 to 10 mg/ml, preferably from 4.25 to 5.75 mg.
  • the following preparation examples of the injection of the present invention is from 1 to 10 mg/ml, preferably from 4.25 to 5.75 mg.
  • Ginkgolide (based on terpene lactone)
  • Ginkgolide (based on terpene lactone) 10g
  • Ginkgolide (based on terpene lactone) 10g
  • Ginkgolide (based on terpene lactone) 10g
  • Ginkgolide (based on terpene lactone) 25g
  • the active ingredient content and the injection quality of the above Examples 1 to 5 are all in accordance with the quality requirements of the ginkgolide injection of the present invention.

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Abstract

一种银杏内酯注射液及其制备方法,注射液含有下述成分:银杏内酯以萜类内酯计1-10mgml,甘油0.2-0.5ml/ml,乙醇0.4-0.7ml/ml、注射用水0-0.5ml/ml。

Description

银杏内酯注射液及其制备方法 技术领域
本发明涉及一种中药制剂的制备方法, 特别涉及银杏内酯注射液及其的制备方法, 属 于药物领域。
背景技术
自上世纪 60年代开始, 许多国家采用现代分离技术对银杏叶的化学成分进行研究, 经 药理实验和临床验证, 发现银杏叶的多方面生物活性与其所含特定化学成分有关。 德国 Dr. Willar Schwabe首次注册了银杏叶的一种简单提取物,于 1972年申请了专禾 l」(W Schwabe DE 176708和 DE 2117429), 定名为 EGb761, 用于治疗心脑血管疾病和神经系统疾病, 具有显 著疗效, 且无毒副作用, 银杏内酯类化合物 (ginkgolids) 具有强血小板活化因子 (PAF) 拮抗作用。 银杏制剂被列为治疗药物的国家有德国、 法国和中国, 其他国家均用为保健食 品或非处方用药, 美国开发出的银杏保健食品已经获得 FDA批准。
银杏内酯属于萜类化合物, 称为萜类内酯, 由倍半萜内酯和二萜内酯组成, 是银杏叶 中一类重要的活性成分。 白果内酯 (bilobalide) 属倍半萜内酯, 由 R.T.Major于 1967年和 KWeinges于 1969年分离得到, 目前从银杏叶中发现的唯一的一个倍半萜内酯化合物。 银 杏内酯 A、 B、 C、 M、 J (ginkgolid A、 B、 C、 M、 J) 为二萜内酯化合物, 于 1932年由 S.Furukawa首次从银杏叶中分离出来, 1967年才由 K.Nakanish、 M.Mamyama禾卩 K.Okabe 等人进一步分离和确定其化学结构。从结构上看, 白果内酯类分子骨架由 15个碳原子组成, 具有互相稠合在一起的 4个五元环, 其中有 1个五元碳环, 3个五元内酯碳环, 五元环上连 有 1个天然产物中罕见的叔丁基。 白果内酯有很强的生物活性, 具有促进神经生长的作用, 可防止脑细胞线粒体氧化应激引起的功能改变, 改善老年记忆功能, 防止老年痴呆的发生, 以及防止脑、脊髓神经脱髓鞘作用, 其神经营养、神经保护作用比银杏内酯强。银杏内酯 B 有抗炎、 抗休克、 保护心脑血管、 治疗急性胰腺炎等作用。 而银杏内酯类化合物的分子骨 架由 20个碳原子组成, 具有 6个五元环, 其中有 2个五元碳环, 3个五元内酯环, 1个四 氢呋喃环, 两个五元碳环以螺环的形式连接在一起, 其余的环以稠合的方式连接, 形成一 个刚性茏状的特殊立体化学结构。 银杏内酯分子中均具有天然产物中罕见的叔丁基。 银杏 内酯包括二萜类和倍半萜类内酯, 二萜类内酯主要有银杏内酯 A、 B、 C、 J、 M等, 半萜类 内酯有白果内酯。
自 20世纪 70年代初发现了 PAF后, 药理学家对银杏内酯进行了研究, 明确银杏萜内 酯是强血小板活化因子拮抗剂, 免疫系统、 中枢神经系统、 缺血损伤有保护作用, 并有抗 休克、 抗过敏及抗炎作用。 银杏内酯八、 B、 C、 M、 J结构差别在于含有的羟基数目和羟基 连接的位置不同。 银杏内酯均为强血小板活化因子拮抗剂, 是银杏叶中特殊生理活性的关 键成分。
Figure imgf000003_0001
银否内酯 A 结构式 银杏内醒 B结构式 分子式: C2QH2409 分子量: 408.4 分子式: C2QH2401Q分子量
Figure imgf000003_0002
银杏内酯 C结构式 白果内酯结构式 分子式: C2QH24Ou 分子量: 440.4 分子式: C15H1808分子量: 326.3 银杏内酯对血小板活化因子 PAF受体有强大的特异性抑制作用,其中银杏内酯的 抗 PAF活性最高。 PAF是血小板和多种炎症组织分泌产生的一种内源性磷脂, 是迄今 发现的最有效的血小板聚集诱导剂, 它与许多疾病的产生、 发展密切相关。 而银杏内 酯目前被认为是最有临床应用前景的天然 PAF受体拮抗剂,其拮抗作用活性与化学结 构密切相关。 当内酯结构中 R3为羟基或羟基数目增多时, 对 PAF的拮抗活性减弱, 而当 R2为羟基且 R3为 H时, 则活性显著增强, 其中以银杏内酯 B对 PAF产生的拮 抗作用最强。
银杏内酯的提取及纯化方法较多, 主要有: 溶剂萃取法、 柱提取法、 溶剂萃取- 柱提取法、 超临界提取法及色谱或柱层析纯化法等。 这些方法都不能有效地分离出高 含量的银杏内酯组合物, 且银杏内酯各组成比例不确定, 因此, 在临床使用上药效各 不相同, 由于其含量不高, 也存在一定的安全风险, 无完整的药理毒理及临床试验数 据, 因此, 上述方法均处于试验阶段, 未实施于药品生产过程, 在中国虽有银杏内酯 注射液相关专利, 但其组成均与本发明不同, 经 ICH成员国多家官方网站检索, 迄今 尚无其它银杏内酯注射剂产品上市。银杏内酯类成分的测定目前多采用 HPLC-UV法、 HPLC -MS和 HPLC-ELSD法, 这些方法仅能对银杏内酯各成分的含量进行测定, 由 于缺乏对其产品中有害物质的严格控制, 并不能真实的反映出药品的质量特性, 不形 成一个完善的药品质量控制体系。
在其它发明专利中有采用葡甲胺或氢氧化钠作为助溶剂,由于银杏内酯在独特五元环 结构, 在碱性条件下可导致内酯开环而失去药物疗效, 不可避免的给临床用药带来巨 大的安全隐患。 本发明欲提供一种具有优良的生产工艺和严格的质量控制方法的银杏 内酯注射液。
发明内容
由于银杏内酯为脂溶性物质, 在水中几乎不溶, 采用安全性极高的药用辅料乙醇和甘 油作为本发明的助溶剂,严格控制助溶剂比例在 1:1~5:1之间,银杏内酯的结构不发生变化, 有效地解决了药物的溶解性问题, 用枸橼酸或盐酸作为 pH调节剂, 可以使药物更加稳定, 避免了药物放置过程析晶导致澄明度和不溶性微粒不合格, 解决了临床使用的安全隐患。
本发明所解决的技术问题是提供一种银杏内酯注射液, 具有组分清晰且比例固定 的优点, 而且有效地去除了大分子、 蛋白质, 避免了不良反应的发生。 本发明注射液的活 性成分是采用高纯度, 组分清晰且比例固定的银杏内酯, 有效部位含量在 95%以上, 其中 4 种组分含白果内酯 (C15H1808 ) 为 25.0%~50.0%、 银杏内酯 A ( C20H24O9 ) 为 20.0 ~45.0 银杏内酯 B ( C20H24Oio) 为 10.0 ~30.0 银杏内酯 C ( C20H24Oii ) 为 5.0%~15.0%。
本发明银杏内酯注射液含有下述成分:
银杏内酯 (以萜类内酯计) l-10mg/ml (优选 5mg/ml)
甘 油 0.2-0.5ml/ml (优选 0.4ml/ml)
乙 醇 0.4-0.7ml/ml (优选 0.6ml/ml)
注射用水 0-0.5ml/ml (优选 Oml/ml)
在上述处方中, 实质存在两种情形:
1、 当注射用水取 0时, 采用甘油和乙醇作为助溶剂。
严格控制助溶剂体积比例在 1:1~5:1之间, 即乙醇、 甘油的体积比为乙醇 1~5份, 甘油 1份。
优选处方如下:
银杏内酯 (以萜类内酯计) 10g
甘 油 800ml
加乙醇至 2000ml
制 成 1000支
即本发明银杏内酯注射液含有下述成分:
银杏内酯 (以萜类内酯计) 5mg/ml
甘 油 0.4ml/ml
乙 醇 0.6ml/ml。
2、 当注射用水不为零时, 采用甘油和乙醇作为助溶剂。
严格控制助溶剂体积比例在 1:1~5:1之间, 即乙醇、 甘油的体积比为乙醇 1~5份, 甘油 1份。
优选处方如下: 银杏内酯 (以萜类内酯计) 10g
甘 油 400ml
乙 醇 1200ml
加注射用水至 2000ml
~ ~~ ^ 1000支
即本发明银杏内酯注射液每毫升含有下述成分:
银杏内酯 (以萜类内酯计) 5mg/ml
甘 油 0.2ml/ml
乙 醇 0.6ml/ml
注射用水 0.2ml/ml。
乙醇与甘油和注射用水具有良好的互溶性, 混合后溶液具有良好的稳定性, 作为溶剂 可以保持药物原有的化学结构, 有利于人体吸收, 发挥药物疗效。 银杏内酯在乙醇中具有 良好的溶解性, 但完全以乙醇作为注射用溶剂对人体的刺激性较大, 因此, 用甘油及少量 注射用水稀释乙醇, 可有效的缓解静脉注射过程中的疼痛和人体对乙醇的耐受性, 不会改 变溶液对药物的溶解性和溶液的稳定性。
本发明银杏内酯注射的制备方法如下:
a) 配制: 混合乙醇和甘油 (助溶剂比例要求 1:1~5:1 ), 加入银杏内酯, 搅拌溶解, 补 加乙醇或注射用水至全量, 用 5~10%枸橼酸溶液或 1~10%盐酸溶液调节 pH值至 2.5〜6.5; 优选 pH值为 3.2〜3.8。
b) 过滤除菌;
c) 灌封;
d) 灭菌。
本发明注射液的质量控制方法包括:
性状: 无色澄明液体。
pH值: 为 3.0~4.5。 优选 pH值为 3.2〜3.8。
溶液颜色: 小于黄色 4号标准比色液 (中国药典)。
鞣质、 树脂、 草酸盐、 钾离子: 不得检出。
异常毒性: 制成每 lml中含 0.2mg的溶液, 符合静脉注射法给药。
热原: 剂量按家兔体重每 1kg注射 5ml合格 (中国药典)。
溶血与凝聚:取本发明注射液 6ml加入到 0.9%氯化钠注射液 100ml中稀释,检查合格(中 国药典)。
过敏试验: 取本发明注射液, 加 0.9%氯化钠注射液稀释至以萜类内酯计 0.4mg/ml, 静脉 注射供试品溶液 30分钟内, 不得出现过敏反应。
刺激性试验: 取本发明注射液用 0.9%氯化钠注射液稀释成浓度为 0.5mg/ml溶液, 取家 兔 3只, 雌雄不拘, 称重, 每日家兔右侧耳缘静脉滴注供试品溶液 10ml/kg, 同时左侧耳缘静 脉滴注等体积 0.9%氯化钠注射液, 共滴注 3次。 于每次给药前和给药后 1、 6小时以及末次 给药后 48小时, 肉眼观察注射部位血管有无充血、 出血、 坏死等刺激反应症状。 于末次注射 后 48小时, 颈动脉放血处死家兔, 自滴注进针处近心端 1厘米处, 剪取耳缘 2厘米, FAA 液固定, 常规脱水, 石蜡包埋切片, HE染色, 在光学显微镜下对血管组织进行病理学检查, 判断是否具有刺激性。 静脉滴注供试品, 不得出现血管刺激反应。
总银杏酸: 色谱柱 C18, 流动相: 甲醇一 1 %冰醋酸 (90: 10), 检测波长为 310nm。 以白果新酸对照品外标法计算总银杏酸含量不超过 lppm。
指纹图谱: 色谱柱 C18, 流动相: 甲醇-四氢呋喃-水 (25:10:65), 蒸发光散射检测器, 漂移管温度: 105°C, 载气流速: 3.00IJmin, 柱温: 40°C, 以白果内酯对照品、 银杏内酯 A 对照品、 银杏内酯 B对照品、 银杏内酯 C对照品为参照物, 按中药色谱指纹图谱相似度评 价系统, 供试品指纹图谱四个共有峰与对照指纹图谱相似度大于 0.95。
无菌: 照薄膜过滤法, 用 0.9%无菌氯化钠溶液稀释过滤, 并用 0.9%无菌氯化钠溶液冲 洗滤膜 3次, 无菌合格 (中国药典)。
含量: 色谱柱 C18, 流动相: 甲醇-四氢呋喃-水 (25:10:65 ), 用蒸发光散射检测器, 漂 移管温度: 105°C ; 载气流速: 3.00L/min; 柱温: 40°C。 用 Extrelut-20柱吸附处理样品后测 定, 每 1ml 含萜类内酯以白果内酯 (C15H1808)、 银杏内酯 A ( C2QH2409)、 银杏内酯 B (C2oH24Oio) 和银杏内酯 C (C2oH24Oii ) 的总量计为 4.5~5.5mg。
银杏内酯注射液具有活血化瘀, 通经活络的功效。 用于中风病中经络 (轻中度脑梗塞) 恢复期淤血阻络症, 症见半身不遂, 口舌歪斜, 言语謇涩, 肢体麻木等。
本发明注射液采用高纯度、 组分清晰且比例固定的银杏内酯, 有效部位含量在 95%以上, 其中 4种组分含白果内酯(C15H1808)为 25.0%~50.0%、银杏内酯 A (C20H24O9) 为 20.0 ~45.0 银杏内酉旨 B (C2oH24Oio) 为 10.0 ~30.0 银杏内酉旨 C (C2oH24Oii ) 为 5.0 ~15.0 , 总银杏酸小于 5ppm, 符合欧盟要求。 整个生产工艺确保了萜类内酯成分比 例稳定和临床疗效, 并将凝胶色谱法和液-质联用技术应用到检测领域, 解决了常规中药注 射剂生产工艺中大分子物质、 聚合物和蛋白质的残留, 大大地降低了不良反应的发生, 指 纹图谱 4个共有峰相似度大于 0.95。 针对萜类内酯不溶于水的性质, 筛选出有效的助溶剂 —乙醇-甘油混合溶剂, 即解决了常规工艺的技术难题, 避免采用其它酸碱性辅料导致银 杏内酯开环而破坏主成分结构, 使有效成分更加稳定, 同时也达到了注射剂的无菌要求。 质量控制指标从多角度、 全方位控制产品质量, 有效地建立了完善的杂质控制方法, 采用了指纹图谱、 异常毒性、 刺激性试验、 溶血与凝聚、 过敏试验等目前中药注射液最为 严格的检测技术控制产品质量, 大大的提高了临床使用的安全性, 质量控制技术已远远 超过目前国际上公认银杏叶提取物注射液, 已达到国际先进水平。
本发明为有效部位中药注射剂, 有效地去除了大分子、 蛋白质, 避免了不良反应的发 生, 并且具有能耗低、 疗效确切、 操作简单、 质量易控、 生产成本低等特点, 比其它银杏 类注射液安全性更高。
附图说明
图 1 01批银杏内酯注射液 LC-MS图 (分子量 400~1000)。 图 7 白果新酸线性关系图。
图 8 银杏内酯注射液对照指纹图谱;
其中共有峰中峰 2: 银杏内酯 C, 峰 3: 白果内酯, 峰 4: 银杏内酯 A, 峰 5: 银杏内酯8。
具体实施方式
本发明原料银杏内酯含白果内酯 (C15H1808) 25.0 ~50.0 银杏内酯 A (C20H24O9) 20.0 ~45.0 银杏内酯 B (C20H24O10) 10.0 ~30.0 银杏内酯 C (C20H24Ou ) 5.0%~15.0%, 且白果内酯、 银杏内酯 、 银杏内酯8、 银杏内酯 C总量大于 95%。
以下是选择助溶剂及 pH调节剂的依据。
一、 助溶剂的选择: 根据原辅料的性质和注射液的制备工艺要求, 筛选溶剂及助溶剂 的用量比例。
试验 1 : 取乙醇 1200ml和甘油 800ml, 混匀, 加入银杏内酯 10g, 搅拌溶解, 调节 pH 至 3.2〜3.8, 中间体检验合格后, 过滤至澄明, 灌封、 灭菌。
试验 2: 取乙醇 400ml和甘油 1600ml, 混匀, 加入银杏内酯 10g, 搅拌溶解, 调节 pH 至 3.2〜3.8, 中间体检验合格后, 过滤至澄明, 灌封、 灭菌。
试验 3: 取乙醇 300ml和甘油 1700ml, 混匀, 加入银杏内酯 10g, 搅拌溶解, 调节 pH 至 3.2〜3.8, 中间体检验合格后, 过滤至澄明, 灌封、 灭菌。
试验 4: 取乙醇 1200ml和甘油 400ml, 混匀, 加入银杏内酯 10g, 搅拌溶解, 加注射用 水至 2000ml, 调节 pH至 3.2〜3.8, 中间体检验合格后, 过滤至澄明, 灌封、 灭菌。
试验 5: 取乙醇 400ml和甘油 1000ml, 混匀, 加入银杏内酯 10g, 搅拌溶解, 加注射用 水至 2000ml, 调节 pH至 3.2〜3.8, 中间体检验合格后, 过滤至澄明, 灌封、 灭菌。
将上述样品进行低温冻融试验循环 3次, 分别检查溶液的性状、 不溶性微粒和溶液 pH 变化, 并观察试验后是否有晶体析出。 试验结果见表 1。
表 1 助溶剂筛选试验结果
试验名称 试验 1 试验 2 试验 3 试验 4 试验 5 配液时
搅拌后快速溶解 搅拌后快速溶解 搅拌后缓慢溶解 搅拌后快速溶解 搅拌后缓慢溶解 溶解状况
试验后 无色澄明液体, 无色澄明液体, 无色澄明液体, 无色澄明液体, 无色澄明液体, 外观性状 无晶体析出。 无晶体析出。 有晶体析出。 无晶体析出。 有晶体析出。 不溶性微粒 合格 合格 不合格 合格 不合格 溶液 pH 基本不变 略有变化 升高 0.5 基本不变 升高 0.6 不加注射用水时, 药液中乙醇与甘油的体积比例为 1:1~5:1, 最佳比例为 3:2; 加注射用 水时最佳比例为 4:1。 乙醇比例越大, 银杏内酯溶解速度越快。 药液经冻融试验后 pH、 不 溶性微粒及外观性状均符合药典规定。
二、 pH调节剂的选择: 由于银杏内酯在弱酸性条件下相对稳定, 分别用 5~10%枸橼酸 溶液或 1~10%盐酸溶液进行筛选。
试验 1 : 取乙醇 1200ml和甘油 800ml, 混匀, 加入银杏内酯 10g, 搅拌溶解, 用 5%盐 酸调节 pH至 3.2〜3.8, 中间体检验合格后, 过滤至澄明, 灌封、 灭菌。
试验 2: 取乙醇 400ml和甘油 1600ml, 混匀, 加入银杏内酯 10g, 搅拌溶解, 用 10% 盐酸调节 pH至 3.2〜3.8, 中间体检验合格后, 过滤至澄明, 灌封、 灭菌。
试验 3: 取乙醇 1200ml和甘油 400ml, 混匀, 加入银杏内酯 10g, 搅拌溶解, 加注射用 水至 2000ml, 用 10%枸橼酸溶液调节 pH至 3.2〜3.8, 中间体检验合格后, 过滤至澄明, 灌 封、 灭菌。
试验 4: 取乙醇 1200ml和甘油 800ml, 混匀, 加入银杏内酯 10g, 搅拌溶解, 用 10% 枸橼酸溶液调节 pH至 3.2〜3.8, 中间体检验合格后, 过滤至澄明, 灌封、 灭菌。
分别检查溶液的性状、 不溶性微粒和灭菌前后溶液 pH变化, 将样品于低温 (0~6°C ) 放置 3天, 观察低温放置条件下是否有晶体析出。 试验结果见表 2。
表 2 pH调节剂筛选试验结果
Figure imgf000008_0001
经 pH调节剂筛选试验, 本品中 pH调节剂可用 5~10%枸橼酸溶液或 1~10%盐酸溶液, 用盐酸溶液调节 pH, 灭菌后略有升高, 但变化不大, 枸橼酸为弱酸, 调节 pH更加稳定。 盐酸和枸橼酸均可作为溶液 pH调节剂。 发明人对上述发明内容进行了研究与说明, 用于证明本发明的技术效果。 下述试验用 于进一步说明与解释本发明, 但不限制本发明。
试验例 1 银杏内酯质量控制一含量测定
色谱条件与系统适用性试验: 以十八烷基硅烷键合硅胶为填充剂; 以甲醇-四氢呋喃- 水(25:10:65 )为流动相; 用蒸发光散射检测器,漂移管温度: 105°C ; 载气流速: 3.00L/min; 柱温: 40°C ; 理论板数按白果内酯峰计算应不低于 2500。 白果内酯峰与银杏内酯 C峰的分 离度应大于 1.5。
对照品溶液的制备: 分别精密称取白果内酯对照品、 银杏内酯 A对照品、 银杏内酯 B 对照品、银杏内酯 C对照品适量,加甲醇溶解并定量稀释制成每 1ml分别含 0.15mg、0.12mg、 0.1mg、 O.lmg的混合溶液, 摇匀, 即得。 供试品溶液的制备: 取银杏内酯 6mg, 精密称定, 置 10ml量瓶中加甲醇 lml溶解, 加 流动相稀释至刻度, 摇匀, 即得。
测定法: 分别精密吸取对照品溶液 10μ1、 20μ1和供试品溶液 10~20μ1, 注入高效液相色 谱仪, 记录色谱图, 用外标两点法对数方程分别计算白果内酯、 银杏内酯 Α、 银杏内酯 Β 和银杏内酯 C的含量, 即得。
按干燥品计算, 含白果内酯 (C15H1808) ¾ 25.0 ~50.0 , 含银杏内酯 A (C20H24O9) 为 20.0%~45.0%, 含银杏内酯 B (C20H24Oio) 为 10.0%~30.0%, 含银杏内酯 C ( C20H24Ou ) ¾ 5.0 ~15.0 , 且白果内酯、 银杏内酯 、 银杏内酯8、 银杏内酯 C总量不低于 95.0%。
试验例 2 银杏内酯注射液质量控制一有关物质检查
( 1 ) 蛋白质: 取本发明注射液 2ml, 加水制成 50ml, 作为供试品溶液。 称取考马斯亮 蓝 G-250约 50mg,溶于 25ml乙醇中, 再加入 85% (w/v)的磷酸 50ml,加水稀释至 500ml, 摇匀, 过滤, 精密量取滤液 5ml置试管中, 再加入 lml供试品贮备溶液, 摇匀, 放置 3min。 同法做空白, 于 595nm波长下, 测定吸光度, 供试品溶液吸光度小于 0.05。
(2) 鞣质: 取本发明注射液 lml加入稀醋酸 1滴, 再加明胶氯化钠试液 5滴, 摇匀, 放置 10分钟, 未出现浑浊或沉淀。
( 3 ) 树脂: 取本发明注射液 5ml, 加盐酸 1滴, 放置 30分钟, 应无树脂状物质析出。
(4) 草酸盐: 取本发明注射液 2ml, 用稀盐酸调节 pH值至 1〜2, 滤过, 滤液用氨水 调节 pH值为 5〜6, 加 3%氯化钙溶液 3滴, 放置 10分钟, 未出现浑浊或沉淀。
( 5 ) 钾离子: 取本发明注射液 2ml, 置 10ml纳氏比色管中, 加碱性甲醛溶液 0.6ml、 3 EDTA溶液 2滴、 3%四苯硼钠溶液 0.5ml,加水稀释至 10ml,另取标准氯化钾溶液 0.8ml, 同法试验, 供试品溶液的浊度低于对照溶液。
试验例 3 银杏内酯注射液质量控制一异常毒性检查
供试品溶液的制备: 取本发明注射液加氯化钠注射液制成每 lml中含 0.2mg的溶液。 检查法: 取体重 17~20g小鼠 5只, 分别注入小鼠尾静脉供试品溶液 0.5ml, 48小时内 无死亡。
试验例 4 银杏内酯注射液质量控制一热原检查
供试品溶液的制备: 取本发明注射液 2ml, 加入到 0.9%氯化钠注射液 50ml中, 摇匀。 检查法: 取家兔 3只, 测定其正常体温后 15分钟内, 按家兔体重每 1kg注射 5ml自耳 静脉缓缓注入供试品溶液,每隔 30分钟测定体温 1次,共测 6次,体温升高均应低于 0.6°C, 并且 3只家兔体温升高总和低于 1.3°C。
试验例 5 银杏内酯注射液质量控制一溶血与凝聚检查
供试品溶液的制备: 取本发明注射液 6ml, 加入到 0.9%氯化钠注射液 100ml中摇匀。 检查法: 取洁净玻璃试管 5只, 编号, 1、 2号管为供试品管, 3号管为阴性对照管, 4 号管为阳性对照管, 5号管供试品对照管。 按表 3所示依次加入 2%红细胞悬液、 0.9%氯化 钠溶液、 蒸馏水, 混匀后立即置 37°C±0.5°C的恒温箱中进行温育。
试验试液加入量见表 3。 表 3 溶血和凝聚试验试液加入
Figure imgf000010_0001
如试管中的溶液呈澄明红色, 底部无细胞残留或有少量红细胞残留, 表明有溶血发生; 如红细胞全部下沉, 上清液无色澄明, 或上清液虽有色澄明, 但 1、 2、 5号管肉眼观察无明 显差异, 则表明无溶血发生。若溶液中有棕红色或红棕色絮状沉淀, 轻轻倒转 3次仍不分散, 表明可能有红细胞凝聚发生。
3小时后观察无溶血和凝聚反应。
试验例 6 银杏内酯注射液质量控制一大分子物质及聚合物检查
a.试验仪器及试剂
Agilent 1200 型高效液相色谱仪, 紫外检测器, 示差折光检测器。 Phenomenex BioSep-SEC-S2000凝胶色谱柱。
右旋糖酐对照品 D2000 (蓝色葡聚糖 2000 ), 中国药品生物制品检定所, 批号 140646-2000-01
葡萄糖对照品 (DO ), 含量: 99.5% , 批号 086K0166, SIGMA
超纯水用 Millipore-Q超纯水系统制得。
其余试剂为分析纯。
样品来源: 银杏内酯注射液, 批号 100501, 100502, 100503, 规格均为: 2ml。
b.流动相的选择
选取 0.71% (内含 0.02%的叠氮化钠) 硫酸钠溶液作为流动相。
c.检测器的选择
选用通用型检测器示差折光检测器, 该检测器对于存在折光系数差异的物质均有良好 的响应。
d.拟确定的色谱条件
色谱柱: Phenomenex BioSep-SEC-S2000, 300x7.8mm, 5um
流动相: 0.71% (内含 0.02%的叠氮化钠) 硫酸钠溶液
柱温: 35°C, 检测器温度: 35°C, 流速: 0.5ml/min
e.银杏内酯的分子量
Figure imgf000010_0002
f.方法学研究 ①将右旋糖酐和葡萄糖对照品分别加流动相制成 10mg/ml的溶液, 分别精密吸取对照 品溶液各 20μ1, 注入色谱仪, 记录色谱图, 结果右旋糖酐在保留时间 9.816'出峰, 葡萄糖在 保留时间 18.712'出峰, 表明采用凝胶色谱法, 分子量大的物质先出峰, 分子量小的物质后 出峰。
②取银杏内酯注射液 2ml, 加入右旋糖酐对照品溶液 (10mg/ml) lml, 混匀, 精密吸 取 10μ1, 注入色谱仪, 记录色谱图, 结果在保留时间 9.698'检出右旋糖酐, 银杏内酯注射液 成分峰均在 18min 以后出峰, 表明分子量在 180~450 出峰时间在 18min 左右, 分子量 5000-2000000出峰时间在 9min左右, 表明采用凝胶色谱法来检测大分子物质是可行的。
为了再一次验证本品中不含大分子、 聚合物, 故又进行了 LC-MS液质联用试验。 a.色谱条件
流动相: 甲醇-水 (90:10)、 色谱柱: Agilent RX-C18 (2.1x50mm)
柱温: 25 °C 流速: 0.3ml/min
b.供试品溶液的制备
精密量取本发明银杏内酯注射液 2ml置 10ml量瓶中, 加流动相稀释至刻度, 摇匀, 供 试品溶液的制备。
c. LC-MS联用测试
根据确定的试验方法, 分别取三批供试品溶液各 10μ1, 注入色谱仪, 在 400~1000 和 400-3000分子量范围内测试分子量, 试验结果见表 4。
表 4 LC-MS联用分子量测定结果
Figure imgf000011_0001
从 LC-MS联用分子量测定结果来看, 分别检出银杏内酯 A (分子量 408.5)、 银杏内酯
B (分子量 424.4)、 银杏内酯 C (分子量 440.4), 与银杏内酯的有效组分分子量完全一致, 由于测试分子量范围分别在 400~1000和 400-3000之间, 未对白果内酯分子量 (326.3 ) 进 行测试, 本发明注射液中未检出大于 700 以上分子量的物质, 其它微量低分子量的物质存 在, 不影响本发明注射液质量, 经 LC-MS对银杏内酯中不同成份的分子量测试, 说明本品 中不含大分子或聚合物。
三批银杏内酯注射液测定分子量范围分别为 400~1000和 400~3000之间, LC-MS图谱 见图 1~6。
试验例 7 银杏内酯注射液质量控制一总银杏酸检查
色谱条件与系统适用性试验: 以十八烷基硅烷键合硅胶为填充剂; 以甲醇一 1%冰醋酸 ( 90: 10) 为流动相; 流速 l.Oml/min; 检测波长为 310nm。 理论板数按白果新酸峰计应不 低于 4000。
对照品溶液的制备: 取白果新酸对照品适量, 精密称定, 加甲醇制成每 lml含 5μ§的 溶液作为对照品溶液; 另取总银杏酸对照品适量, 精密称定, 加甲醇制成每 lml含 100μ§ 的溶液, 作为定位用对照溶液。
供试品溶液制备: 取本发明注射液 lml, 加水稀释至 10ml, 摇匀, 用正已烷萃取 3次 (20ml, 15ml, 15ml), 合并正已烷液, 置水浴上蒸干, 残渣加甲醇溶解并稀释至 2ml, 摇 匀, 作为供试品溶液。
测定法: 精密吸取供试品溶液、 对照品溶液及定位用对照溶液各 20μ1, 注入液相色谱 仪, 计算供试品溶液中与总银杏酸对照品相应色谱峰的总峰面积, 以白果新酸对照品外标 法计算总银杏酸含量。 含总银杏酸低于 lppm。
方法学研究:
a.线性试验
对照品溶液的制备: 取白果新酸对照品, 加甲醇制成每 lml含白果新酸 0.104mg的溶 液, 作为对照品溶液 (1 ); 精密量取对照品溶液 (1 ) 0.5ml置 100ml量瓶中, 用甲醇稀释 至刻度, 摇匀, 作为对照品溶液 (2)。
测定法: 分别精密量取对照品溶液(1 ) 2.5μ1、 5μ1、 10μ1、 20μ1和对照品溶液(2) ΙΟμΙ, 注入液相色谱仪, 在上述色谱条件下记录色谱图。 试验结果见表 5。
白果新酸线性试验结果
Figure imgf000012_0001
以进样量为纵坐标, 以峰面积为横坐标,进行线性回归得回归方程: Y=0.0025X— 0.6448 r=0.9999 o
试验结果表明, 白果新酸进样量在 5.2〜2080ng之间, 进样量与峰面积呈良好的线性关 系。
白果新酸线性关系图见图 7。
b.定量限检测限试验
测定法: 分别精密量取线性试验项下对照品溶液 (2) 5μ1和 2μ1, 注入液相色谱仪, 记 录色谱图, 计算白果新酸的定量限和检测限, 白果新酸定量限为 2.24ng, 检测限为 0.69ng。
c.精密度试验
测定法: 精密量取白果新酸对照品溶液 (2) 20μ1, 连续进样 5次, 记录色谱图, 计算 RSD值。 试验结果见表 6。
表 6 精密度试验结果
Figure imgf000012_0002
对照品溶液峰面积 RSD值为 0.35%, 试验结果表明精密度良好。
d.稳定性试验
测定法: 精密量取白果新酸对照品溶液(2) 20μ1, 分别于 0、 2、 4、 8、 12小时注入液 相色谱仪, 在上述色谱条件下, 记录色谱图, 计算 RSD值。 试验结果见表 7。 对照品溶液稳定性试验结果
Figure imgf000013_0001
试验结果表明, 对照品溶液在 12小时内稳定。
e.回收率试验
对照品溶液的制备: 精密称取白果新酸对照品 5.03mg置 10ml量瓶中, 加甲醇溶解并 稀释至刻度, 摇匀, 作为对照品溶液。
供试品溶液制备: 取本发明注射液 9份, 每 3份分别加入对照品溶液 1.6ml、 2.0ml和 2.4ml, 摇匀, 用正已烷萃取 3 次 (20ml、 15ml、 15ml), 合并正已烷萃取液, 置水浴上蒸 干, 残渣加氯仿溶解并定量稀释至 2ml, 摇匀, 作为供试品溶液。
测定法: 分别精密量取对照品溶液和供试品溶液各 20μ1, 在上述色谱条件下, 记录色 谱图, 计算回收率。 试验结果见表 8。
表 8 回收率试验结果
Figure imgf000013_0002
平均回收率为 98.04%, RSD为 1.41%, 试验结果表明, 方法检测银杏酸的限量准确可 罪。
试验例 8 银杏内酯注射液质量控制一指纹图谱检查
色谱条件与系统适用性试验: 以十八烷基硅烷键合硅胶为填充剂; 以甲醇-四氢呋喃- 水(25:10:65 )为流动相; 用蒸发光散射检测器,漂移管温度: 105°C ; 载气流速: 3.00L/min; 柱温: 40°C ; 理论板数按白果内酯峰计算应不低于 2500。 白果内酯峰与银杏内酯 C峰的分 离度应大于 1.5。
参照物溶液的制备: 分别精密称取白果内酯对照品、 银杏内酯 A对照品、 银杏内酯 B 对照品、银杏内酯 C对照品适量,加甲醇制成每 1ml分别含 0.15mg、 0.12mg、 0.1mg、 O.lmg 的混合溶液, 摇匀, 作为参照物溶液。
供试品溶液的制备: 精密量取本发明注射液 lml, 加磷酸盐缓冲溶液 (pH6.5 ) 14ml, 摇匀, 上 Extrelut-20柱, 吸附 15分钟, 用乙酸乙酯 100ml洗脱, 收集洗脱液, 置水浴上蒸 干, 残渣用流动相溶解并转移至 10ml量瓶中, 加流动相稀释至刻度, 摇匀, 用 0.45μηι微 孔滤膜滤过, 作为供试品溶液。
测定法: 分别精密吸取参照物溶液和供试品溶液各 20μ1, 注入液相色谱仪, 记录 60分 钟的色谱图。
按中药色谱指纹图谱相似度评价系统, 供试品指纹图谱与对照指纹图谱经相似度计算 大于 0.95。
发明人对上述发明内容进行了研究与说明, 用于证明本发明的技术效果。 下述试验用 于进一步说明与解释本发明, 但不限制本发明。
在银杏内酯指纹图谱中,其中峰 2为银杏内酯 C、峰 3为白果内酯、峰 4为银杏内酯 A、 峰 5为银杏内酯 B, 本发明注射液中 4个特征峰在指纹图谱中均能一一对应。 银杏内酯注 射液对照指纹图谱见图 8。
首先采用药典委员会 2004年指纹图谱指定软件一中药色谱指纹图谱相似度评价系统 A版对 10批银杏内酯注射液生成对照指纹图谱, 再按中药色谱指纹图谱相似度评价系统 B 版, 计算 10批银杏内酯供试品指纹图谱与对照指纹图谱相似度。 试验结果见表 9。
10批银杏内酯相似度结果
Figure imgf000014_0001
本发明 10批银杏内酯注射液指纹图谱 4个共有峰与对照指纹图谱的相似度均大于 0.95。 试验例 9 银杏内酯注射液质量控制一含量测定
色谱条件与系统适用性试验: 以十八烷基硅烷键合硅胶为填充剂; 以甲醇-四氢呋喃- 水(25:10:65 )为流动相; 用蒸发光散射检测器,漂移管温度: 105°C ; 载气流速: 3.00L/min; 柱温: 40°C ; 理论板数按白果内酯峰计算应不低于 2500。 白果内酯峰与银杏内酯 C峰的分 离度应大于 1.5。
对照品溶液的制备: 分别精密称取白果内酯对照品、 银杏内酯 A对照品、 银杏内酯 B 对照品、银杏内酯 C对照品适量,加甲醇制成每 1ml分别含 0.15mg、 0.12mg、 0.1mg、 O.lmg 的混合溶液, 摇匀, 作为对照品溶液。 供试品溶液的制备: 精密量取本发明注射液 lml, 加磷酸盐缓冲溶液 (pH6.5 ) 14ml, 摇匀, 上 Extrelut-20柱, 吸附 15分钟, 用乙酸乙酯 100ml分次洗脱, 收集洗脱液, 于水浴 上蒸干, 残渣用流动相溶解并转移至 10ml量瓶中, 加流动相稀释至刻度, 摇匀, 用 0.45μηι 微孔滤膜滤过, 作为供试品溶液。
测定法: 分别精密吸取对照品溶液 10μ1、 20μ1和供试品溶液 15μ1, 注入高效液相色谱 仪, 记录色谱图, 用外标两点法对数方程分别计算白果内酯、 银杏内酯 、 银杏内酯 Β和 银杏内酯 C的含量。
本发明注射液每 1ml含银杏萜类内酯以白果内酯(C15H1808)、银杏内酯 A (C2oH2409)、 银杏内酯 B (C20H24Oio) 和银杏内酯 C (C20H24Oii ) 的总量计, 含量为 l-10mg/ml, 优选 4.25~5.75mg。 以下本发明注射液制备例。
实施例 1
处方:
银杏内酯 (以萜类内酯计)
甘 油
Figure imgf000015_0001
加乙醇至 2000ml
制 成 1000支
按处方取甘油和总量 80%的乙醇, 混匀, 加入银杏内酯, 搅拌溶解, 加乙醇至全量, 搅拌均匀, 用 1~10%盐酸调节 pH至 3.2〜3.8, 中间体检验合格后, 过滤至澄明, 灌封、 灭 菌。
实施例 2
处方:
银杏内酯 (以萜类内酯计) 10g
甘 油 800ml
加乙醇至 2000ml
~~ 1000支
按处方取甘油和总量 80%的乙醇, 混匀, 加入银杏内酯, 搅拌溶解, 加乙醇至全量, 搅拌均匀, 用 5~10%枸橼酸调节 pH至 3.2〜3.8, 中间体检验合格后, 过滤至澄明, 灌封、 灭菌。
实施例 3
处方:
银杏内酯 (以萜类内酯计) 10g
甘 油 1000ml
加乙醇至 2000ml
~~ 1000支 按处方取甘油和总量 80%的乙醇, 混匀, 加入银杏内酯, 搅拌溶解, 加乙醇至全量, 搅拌均匀, 用 5~10%枸橼酸调节 pH至 3.2〜3.8, 中间体检验合格后, 过滤至澄明, 灌封、 灭菌。
实施例 4
处方:
银杏内酯 (以萜类内酯计) 10g
甘 油 400ml
乙 醇 1200ml
注射用水加至 2000ml
~~ 1000支
按处方取乙醇和甘油, 混匀, 加入银杏内酯, 搅拌溶解, 加注射用水至全量, 搅拌均 匀, 用 5~10%枸橼酸调节 pH至 3.2〜3.8, 中间体检验合格后, 过滤至澄明, 灌封、 灭菌。
实施例 5
处方:
银杏内酯 (以萜类内酯计) 25g
甘 油 1000ml
乙 醇 3000ml
加注射用水至 5000ml
~~ ^ 1000支
按处方取乙醇和甘油, 混匀, 加入银杏内酯, 搅拌溶解, 加注射用水至全量, 搅拌均 匀, 用 1~10%盐酸调节 pH至 3.2〜3.8, 中间体检验合格后, 过滤至澄明, 灌封、 灭菌。
上述实施例 1~5的活性成分含量、注射液质量均符合本发明银杏内酯注射剂质量要求。

Claims

权利要求书
1、 银杏内酯注射液, 其特征在于: 所述注射液含有下述成分:
银杏内酯: 以萜类内酯计 l-10mg/ml
甘 油 0.2-0.5ml/ml
乙 醇 0.4-0.7ml/ml
注射用水 0-0.5ml/ml。
2、 根据权利要求 1所述的银杏内酯注射液, 其特征在于: 所述注射液含有下述成分: 银杏内酯: 以萜类内酯计 5mg/ml
甘 油 0.4ml/ml
乙 醇 0.6ml/ml。
3、 根据权利要求 1所述的银杏内酯注射液, 其特征在于: 所述注射液含有下述成分: 银杏内酯: 以萜类内酯计 5mg/ml
甘 油 0.2ml/ml
乙 醇 0.6ml/ml
注射用水 0.2ml/ml。
4、 根据权利要求 1所述的银杏内酯注射液, 其特征在于: 乙醇与甘油的体积比为乙醇 1~5份, 甘油 1份。
5、 根据权利要求 1-4任一项所述的银杏内酯注射液, 其特征在于: 银杏内酯按干燥品 计算, 含白果内酯为 25.0%~50.0%, 含银杏内酯 A 为 20.0%~45.0%, 含银杏内酯 B 为 10.0 ~30.0 , 含银杏内酯 C为 5.0%~15.0%; 且白果内酯、 银杏内酯 A、 银杏内酯 B、 银 杏内酯 C总量不低于 95.0%。
6、 权利要求 1所述的银杏内酯注射液的制备方法, 其特征在于: 按注射液含有下述成 分制备:
银杏内酯: 以萜类内酯计 l-10mg/ml
甘 油 0.2-0.5ml/ml
乙 醇 0.4-0.7ml/ml
注射用水 0-0.5ml/ml;
步骤如下:
a)配制:混合乙醇和甘油,加入银杏内酯、溶解,补加乙醇或注射用水至全量,用 5~10% 枸橼酸溶液或 1~10%盐酸溶液调节 pH值至 2.5〜6.5;
b) 过滤除菌;
c) 灌封;
d) 灭菌。
7、 根据权利要求 6所述的银杏内酯注射液的制备方法, 其特征在于: 步骤 a) 配制调 pH值至 3.2〜3.8。
8、 根据权利要求 6或 7所述的银杏内酯注射液的制备方法, 其特征在于: 步骤 a) 配 制时, 乙醇与甘油的体积比为乙醇 1~5份, 甘油 1份。
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