CN105078886A - Paclitaxel micelle preparation - Google Patents
Paclitaxel micelle preparation Download PDFInfo
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- CN105078886A CN105078886A CN201410198670.9A CN201410198670A CN105078886A CN 105078886 A CN105078886 A CN 105078886A CN 201410198670 A CN201410198670 A CN 201410198670A CN 105078886 A CN105078886 A CN 105078886A
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Abstract
The invention belongs to the technical field of pharmaceutical preparations, and particularly relates to a paclitaxel micelle preparation. mPEG-PLA-lysine triblock copolymer is adopted as a micelle carrier, and average grain diameter of paclitaxel micelle is 20-40nm. The paclitaxel micelle preparation is prepared through a direct dissolving method, a dialysis method or a thin-film hydration method. The paclitaxel micelle preparation has the advantages that polyethylene glycol methyl ether-polylactide-lysine which is lower in toxicity is adopted as the micelle carrier, and other excipients do not need to be added in the micelle preparation, so that higher safety is realized; in-vitro stability is high, the paclitaxel micelle can be maintained stable at room temperature for more than 12h and at low temperature for 168h, and the paclitaxel micelle preparation is high in blood stability, small in grain diameter and more prone to bring ERP effect into play.
Description
Technical field
The invention belongs to pharmaceutical preparations technology field, be specifically related to a kind of paclitaxel micellar preparation.
Background technology
Taxane molecule formula is: C
47h
51nO
14, molecular weight 853.9, fusing point 213 ~ 216 DEG C, has height lipotropy, water insoluble, is the natural anti-cancer drugs being separated a kind of efficient, low toxicity, the wide spectrum that obtain at first from Chinese yew genus plants.It is the natural secondary metabolite of a kind of complexity in Chinese yew genus plants, and molecular structure is shown in following formula.
Paclitaxel is the specific medicine had compared with high anti-cancer activity of a kind of microtubule, and sales volume ranks the umber one of anti-cancer agent throughout the year, and with 20% speed increase.
1977, HorwitZ find paclitaxel anticancer mechanism be can with tubulin binding, promote that tubulin polymerization is assembled into microtubule dimer, thus the normal physiological depolymerization of microtubule in T suppression cell, make cell mitogen stop at G2 phase and M phase, prevent the Fast-propagation of cancerous cell.Further research finds that paclitaxel can activating macrophage, causes minimizing and the release thereof of Tumor Necrosis Factor Receptors, kills and wounds or inhibition tumor cell; Paclitaxel can cell death inducing, causes apoptosis; Paclitaxel can also the migration of inhibition tumor cell.Clinical research shows, paclitaxel has wide spectrum and efficient active anticancer, and give prominence to for treatment ovarian cancer, breast carcinoma, uterus carcinoma, gastric cancer etc. curative effect, recent research finds that it also has certain curative effect to rheumatoid arthritis, senile dementia etc.
Because paclitaxel is insoluble in water, usually paclitaxel is dissolved in polyoxyethylene castor oil (cremophorEL) and dehydrated alcohol mixed solvent to increase its water solublity in current clinical practice.But ethanol has certain cytotoxicity, and during polyoxyethylene castor oil degradation in vivo, discharge histamine, cause anaphylaxis in various degree, neurocyte endoparticle also can be caused to discharge and disentwining angle velocity and increase the weight of the peripheral nervous toxicity of paclitaxel.
For the toxicity reducing formulation for paclitaxel improves its curative effect, develop the novel form of paclitaxel in recent years clinically successively.Wherein at home and abroad do not go on the market containing polyoxyethylene castor oil injection paclitaxel albumin nano suspension (ABI-007).To have without antiallergic pretreatment, curative effect better, the feature such as toxicity is lower; The Paclitaxel liposome now carrying out the research and development of clinical research China just has at home started the prodrug (DHA-PTX) of the paclitaxel in clinical practice and polymeric dosage form genexol-PM and xyotax also just before clinical and in clinical I-III phase research, shows good prospect.
But recent research finds, it is no matter the polymer micelle that the particle diameter that formed by heavy polymer is larger, or the polymer micelle that the particle diameter formed by low-molecular weight polymer is less, there is the shortcoming that blood stability is poor, micelle almost disintegrates and discharges the medicine carried at once after entering blood, the medicine distribution in vivo that final two kinds of micelles carry is almost as broad as long, does not show ERP effect.The research of the people such as SavicR finds, usually in 5 minutes, just there is the drug release more than 90% after paclitaxel micelle enters blood and spread (see Langmuir2006,22:3570-8. " Assessmentoftheintegrityofpoly (caprolactone)-b-poly (ethyleneoxide) micellesunderbiologicalconditions:afluorogenic-basedappr oach. ") toward tissue.
This result carries medicine with imagination by micelle particle, arrives tumor locus and is greatly differed from each other by the perfect condition of EPR effect release medicine, be i.e. non-maturation release (Prematurerelease).Be directed at the non-ripe reason discharged on the one hand because the concentration of micelle after hemodilution causes micelle to disintegrate lower than its critical micelle concentration (CMC concentration), the protein meeting of a large amount of existence in blood on the other hand and micelle are had an effect and are caused it to reunite and discharge medicine.Therefore, must first consider its blood stability when designing intravenous injection cancer target nano-carrier, being only just expected to utilize EPR effect to improve the targeting of medicine under the prerequisite improving blood stability.
Another weak point of existing paclitaxel micelle is that process conditions are more complicated, adds difficulty to heavy industrialization.Such as, the raw process conditions waiting the preparation process of taxol-polymer medicine-carrying micelles (number of patent application 201110255867.8) of people's invention to need to adopt constant temperature oscillation of Lanzhou University Liu Wei; A kind of paclitaxel nano micelle of people's inventions such as Peking University Lu Wan Liang and application (application number: 201110044677.1) need to use buffer to keep the pH value of reaction environment to stablize in preparation process thereof.Containing a certain amount of ethanol in the paclitaxel micelle also had, still there is certain cytotoxicity.The Crinis Carbonisatus such as the Li Lingbing of such as Shandong University understand a kind of paclitaxel mixed micelle preparation and preparation method thereof (number of patent application 201110139712.8), but still containing ethanol in its mixed micelle.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of paclitaxel micellar preparation formed for micellar carrier with mPEG-PLA-lysine is provided.The paclitaxel micelle that the present invention obtains is containing micro ethanol, and its leading indicator such as stability, mean diameter is better than existing paclitaxel micelle comprehensively.
A kind of paclitaxel micellar preparation provided by the invention, adopts novel surfactant mPEG-PLA-lysine to be micellar carrier.MPEG-PLA-lysine molecule structural formula is as follows:
Wherein, a=11-455, b=3-300.
In the present invention, in described mPEG-PLA-lysine, the molecular weight of methoxypolyethylene glycol block is preferably 1000 ~ 3000; The molecular weight of polylactide block is preferably 500 ~ 5000.
In the present invention, ethanol residual in described paclitaxel micellar preparation or ethane nitrile content are less than 10ppm.
In the present invention, the mean diameter of paclitaxel micelle is 20 ~ 40nm.
In the present invention, paclitaxel micelle obtains by direct dissolution method, dialysis or thin film aquation legal system are standby.
In the present invention, mPEG-PLA-lysine is without obvious carcinogenecity, and without genotoxicity, without teratogenesis, mutagenicity, degradable is lactic acid, PEG, lysine in vivo, all can directly excrete.Acute toxicity test is carried out to mice, the LD50>2.00g/kg of mice; In long term toxication, 1.00g/kg dosage, 1 times/day, successive administration 2 days weekly, drug withdrawal 5 days, successive administration, after 13 weeks, recovers to observe after 4 weeks, has no obvious toxic-side effects.
Cytotoxicity test shows, the cytotoxicity of methoxypolyethylene glycol-polylactide-lysine is lower than the block copolymer Mpeg-PLA of current generally recognized as safe (seeing the following form 1).
Table 1:MTT method hepatotoxicity test result
Compared with prior art, the present invention has following beneficial effect:
1. methoxypolyethylene glycol-the polylactide-lysine adopting toxicity lower is micellar carrier, and without the need to adding other adjuvants in micellar preparation, safety is higher.
2. vitro stability is higher, and paclitaxel micelle at room temperature keeps stable time more than 12 hours, and under low temperature, stability was more than 168 hours.
3. blood stability is higher, and particle diameter is less, more easily plays ERP effect.
Detailed description of the invention
Be described in detail the present invention below in conjunction with embodiment, the present embodiment is implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.Material used in following embodiment, reagent etc., if no special instructions, all can obtain from commercial channels.
Embodiment (1-7)
A kind of paclitaxel micellar preparation, can adopt direct dissolution method, dialysis or thin film aquation method to obtain.Preferably, adopt thin film aquation method to obtain, it comprises the following steps.
1. raw material is taken according to the rate of charge (see table 1) that paclitaxel is different from mPEG-PLA-lysine.Wherein, raw material paclitaxel (CAS33069-62-4) is produced by Rayleigh, Xi'an bio tech ltd, and purity is greater than 95%, mPEG-PLA-lysine, is prepared voluntarily according to the technique described in patent No. PCT-CN-2013000453 by inventor;
2. above-mentioned raw materials being dropped in container, adding the organic solvent such as ethanol or acetonitrile to dissolving completely.30-50 DEG C of rotary evaporation 2h is to organic solvent distilled-to-dryness, and at 10-60 DEG C, vacuum drying > 12h removes residual organic solvent, obtains the polymer mixed film containing paclitaxel.
3. hybrid films is in 40-60 DEG C of water-bath to transparence, and add ultra-pure water or normal saline, the phosphate buffer of identical preheating temperature, shake well aquation, obtains transparent polypeptide drug-loaded micelle solution.
4. by described polypeptide drug-loaded micelle solution 0.45 μm of filtering with microporous membrane, i.e. moral paclitaxel micellar preparation of the present invention.
Embodiment 1-7 selects different rate of charges respectively, and selects the mPEG-PLA-lysine of different block molecule amount respectively, obtains paclitaxel micellar preparation according to above-mentioned steps.Use high effective liquid chromatography for measuring drug loading.Use Dynamic Light Scattering Determination particle diameter, record particle size distribution between 10-100nm, mean diameter is (be shown in table 2) between 20-40nm.
Table 2: the drug loading of different embodiment and particle diameter
Carrier=mPEG-PLA-lysine
The assay method of micellar solution stability is, is diluted by polypeptide drug-loaded micelle solution sterilized water, obtains the solution that paclitaxel concentration is about 3mg/ml, to transfer in an aseptic environment in ampoule bottle and to seal.Respectively at 4 DEG C, 15 DEG C, 25 DEG C, under normal indoor illumination condition, whether the solution in 2h perusal ampoule bottle has precipitation or muddy generation.If have precipitation or muddy generation, then illustrate that solution finishes steady statue.The results are shown in Table 3.
Paclitaxel injection extremely unstable, in instillation process, equipment therefor need, with filtering function, prevent medicine from separating out, and paclitaxel micelle stability be higher, instils and does not need defecator.
Table 3: stability test result
The blood stability of contrast the present invention and mpeg-pla paclitaxel micelle.The present invention being diluted to content of taxol is the blood plasma adding 50wt% after 3mg/ml; Matched group adopts the mpeg-pla paclitaxel micelle of equal paclitaxel concentration, adds the blood plasma of 50wt% equally.Every 1 hour with Dynamic Light Scattering Determination particle size distribution coefficient (PDI) whether >0.3, result is as table 4.Its stability in blood plasma of this time shorter explanation is poorer, illustrates that blood of the present invention is significantly higher than mpeg-pla paclitaxel micelle stabilization time.
Table 4: blood stability result of the test
Claims (6)
1. a paclitaxel micellar preparation, is characterized in that, adopts mPEG-PLA-lysine triblock copolymer to be micellar carrier.
2. paclitaxel micellar preparation according to claim 1, is characterized in that: in described mPEG-PLA-lysine, and the molecular weight of methoxypolyethylene glycol block is 1000 ~ 3000.
3. paclitaxel micellar preparation according to claim 1, is characterized in that: in described mPEG-PLA-lysine, and the molecular weight of polylactide block is 500 ~ 5000.
4. paclitaxel micellar preparation according to claim 1, is characterized in that: ethanol residual in described paclitaxel micellar preparation or ethane nitrile content are less than 10ppm.
5. paclitaxel micellar preparation according to claim 1, is characterized in that: the mean diameter of paclitaxel micelle is 20 ~ 40nm.
6. according to the paclitaxel micellar preparation one of claim 1-5 Suo Shu, it is characterized in that: obtain by direct dissolution method, dialysis or thin film aquation legal system are standby.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410198670.9A CN105078886A (en) | 2014-05-10 | 2014-05-10 | Paclitaxel micelle preparation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410198670.9A CN105078886A (en) | 2014-05-10 | 2014-05-10 | Paclitaxel micelle preparation |
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| CN105078886A true CN105078886A (en) | 2015-11-25 |
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| CN201410198670.9A Pending CN105078886A (en) | 2014-05-10 | 2014-05-10 | Paclitaxel micelle preparation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105778127A (en) * | 2016-02-26 | 2016-07-20 | 同济大学 | Polylactic acid-polypeptide polymeric micelle and preparation method thereof |
| CN106361697A (en) * | 2016-08-26 | 2017-02-01 | 四川兴康脉通医疗器械有限公司 | Taxol-carrying micelle polymer containing ibuprofen, preparation, and preparation methods |
-
2014
- 2014-05-10 CN CN201410198670.9A patent/CN105078886A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105778127A (en) * | 2016-02-26 | 2016-07-20 | 同济大学 | Polylactic acid-polypeptide polymeric micelle and preparation method thereof |
| CN106361697A (en) * | 2016-08-26 | 2017-02-01 | 四川兴康脉通医疗器械有限公司 | Taxol-carrying micelle polymer containing ibuprofen, preparation, and preparation methods |
| CN106361697B (en) * | 2016-08-26 | 2019-06-07 | 四川兴康脉通医疗器械有限公司 | A kind of load taxol micellar copolymerization object, preparation and preparation method containing brufen |
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Application publication date: 20151125 |
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| WD01 | Invention patent application deemed withdrawn after publication |