Background technology
Condyloma acuminatum is a kind of sexually transmitted disease (STD), and it is that sickness rate is the second son gonorrhea only by due to the human papilloma virus infection, for occupying the 2nd sexually transmitted disease (STD).Treatment to condyloma acuminatum at present still lacks effective medicine.The Therapeutic Method that can adopt has caused very big misery to patient clinically, and relapse rate is high.
Imiquimod is a kind of immunomodulator, belong to the different cyclammonium class of non-nucleoside medicine, be 1997 by the immunoregulation medicament of the 1st external curing external genitalia wart of FDA (Food and Drug Adminstration) (FDA) approval, adapt to and be used for external genitalia and the crissum condyloma acuminatum that human papilloma virus infection causes, be widely used in clinical.Imiquimod has become the choice drug of treatment condyloma acuminatum in world many countries.The recommended drug of genital wart all classified this medicine as by the Center for Disease Control (CDC), European Center for Disease Control (CDC) (CDC) and " Chinese sexually transmitted disease (STD) treatment guide ".
The pharmaceutical preparation of imiquimod has 5% imiquimod cream at present, is used for the treatment of by human papilloma virus infection the most common caused sexually transmitted disease (STD)-genital wart to have better curative effect.This medicine is the micromolecule immunomodulator, but the immunoreation of irritation cell mediation induce cytokine and act on, obviously reduce HPV2 DNA (deoxyribonucleic acid) (DNA) level of skin histology.The imiquimod clinical practice has the cure rate height, relapse rate is low, side effect is little, patient can oneself operate characteristics such as administration, and the good clinical application prospect is arranged.
In the development test of imiquimod treatment condyloma acuminatum multi-center randomized double, adopt at random, the clinical research methods of double blinding, parallel control, observe the clinical efficacy and the safety of 5% imiquimod cream treatment crissum and external genitalia condyloma acuminatum.The experimenter puts the research medicine on the skin outside 3 parts weekly, cleans 8 weeks of the course of treatment with clear water in 6-8 hour after the medication.The wart body person of fully not disappearing continues to follow up a case by regular visits to 1 month to observe relapse rate.In 231 routine crissum and external genitalia condyloma acuminatum patient, 116 examples are organized in 5% imiquimod cream treatment, placebo group 115 examples.The cure rate in treatment 2,4,6,8 weeks of back is respectively 8.41%, 30.84%, 49.53% and 61.68% in the treatment group, and matched group is respectively 2.68%, 7.14%, 16.07% and 24.11%, two group difference statistical significance (P<0.001); The effective percentage for the treatment of 2,4,6,8 weeks of back is respectively 34.58%, 60.75%, 68.22% and 74.77% in the treatment group, and matched group is respectively 10.72%, 18.75%, 28.57% and 32.14%, two group difference statistical significance (P<0.001).The relapse rate that treatment group recovery from illness patient followed up a case by regular visits to after 1 month is 10.61%, compares the difference not statistically significant with matched group.The untoward reaction of the no system of treatment group only has the local untoward reaction of medicine-feeding part, and for seeing, incidence rate is 34.55% more with slight and moderate erythema.5% imiquimod cream treatment crissum and external genitalia condyloma acuminatum determined curative effect are described, safety is good, has toleration preferably, and is easy to use.
Imiquimod cream has definite curative effect, but because ointment has greasy feeling, easy cleaning not, and easy pollution clothes, thus influence the compliance or the compliance of patient's medication to a certain extent.Therefore, the imiquimod pharmaceutical preparation of development and development of new, significant.
Summary of the invention
The object of the invention is to provide a kind of novel imiquimod pharmaceutical preparation and preparation method thereof, with the compliance that makes things convenient for clinical application and improve the patient.Be the detailed technical scheme of the present invention below.
As one of the object of the invention, a kind of Imiquimod turbid liquor is provided, comprise imiquimod and solvent, it is characterized in that the mixed solvent of described solvent for forming by glycerol, ethanol, boric acid and water.
Wherein, in the above-mentioned described mixed solvent, the proportioning of glycerol, ethanol, boric acid and water can be determined by suitable test according to the invention needs.Among the present invention, described Imiquimod turbid liquor in the wherein said solvent, is preferably counted by weight percentage, glycerol 10%~25%, and ethanol 10%~25%, boric acid 0.5%~3%, surplus is a water.
As a specific embodiment, in the wherein said solvent, calculate 100 parts of glycerol, 100 parts of ethanol, 10 parts of boric acid, 325 parts in water by weight.
Another purpose of the present invention provides a kind of method for preparing above-mentioned described Imiquimod turbid liquor, it comprises the steps: the water-soluble one-tenth boric acid solution of (1) boric acid, after (2) imiquimod is used the glycerol moistening, adds boric acid solution, stir, add ethanol again and make the suspension solution that is creamy white.
The present invention also provides a kind of Imiquimod formulation, and it comprises above-mentioned described Imiquimod turbid liquor and acceptable accessories.Can be according to the needs of preparation, choose suitable, corresponding medicinal adjuvant, make needed pharmaceutical preparation.Concerning one of ordinary skill in the art, it belongs to general pharmaceutical technology.
As one of embodiment of above-mentioned described preparation, the present invention also provides a kind of concrete Imiquimod formulation, and it is a gel, comprises above-mentioned described Imiquimod turbid liquor, gel-type vehicle and pH regulator agent.
Wherein, above-mentioned described gel-type vehicle is preferably acrylic crosslinking polymer, and Acritamer 940 more preferably is to make aqueogel.Its consumption is suitable for coating to have suitable denseness and viscosity.Be generally 0.5%~2%, be preferably 1%.
Wherein, above-mentioned described pH regulator agent, the pH value that is used for regulating gel is to suitable acid-base value, between pH value 6~8, to be fit to application need.Described pH regulator agent can be pharmaceutically conventional acidity-basicity regulator, and the present invention preferably uses triethanolamine as the pH regulator agent.
The present invention also provides a kind of method for preparing above-mentioned described imiquimod gel, comprises wherein said Imiquimod turbid liquor is under agitation slowly joined in the gel-type vehicle, after stirring, adds the step of pH regulator agent to pH value 6~8.
Add meeting creating pockets of air in the gel-type vehicle whipping process at Imiquimod turbid liquor, can leave standstill about about 5 minutes, treat to continue again to stir after bubble is got rid of.Prepared finished product is semi-solid.Abundant mix homogeneously when Imiquimod turbid liquor mixes with gel-type vehicle.Gel finished product pH value is adjusted to 6~8.
As specific embodiment of the present invention, a kind of imiquimod gel is provided, wherein contain imiquimod 50 grams, boric acid 10 grams, glycerol 100 grams, dehydrated alcohol 100 grams, Acritamer 940 10 grams, triethanolamine 5 grams and distilled water 725 grams, make 1000 gram gels by the method that comprises the steps: (1) boric acid adds in the 325 gram distilled water makes dissolving obtain boric acid solution; (2) imiquimod glycerol moistening adds boric acid solution and dehydrated alcohol and makes it the suspension solution that is creamy white, and obtains Imiquimod turbid liquor; (3) Acritamer 940 adds 400 gram distilled water, treats that the complete filtered through gauze of swelling obtains translucent substrate; (4) Imiquimod turbid liquor is under agitation joined in the above-mentioned translucent substrate, stir evenly, under agitation drip ethanolamine, get the opaque gel of milky.
Gel is compared with emulsifiable paste to have with skin coupling effect splendidly, helps the treatment of disease sites; Good looking appearance, fine and smooth smooth, no greasy feeling, easy cleaning reduce the pollution to medicated clothing; Better biocompatibility is arranged, and viscosity is less and help medicine; The advantages such as normal function that energy absorptive tissue transudate does not hinder skin.Thereby more convenient clinical application, raising patient's compliance.
Imiquimod is white or off-white color crystallization or crystalline powder, odorless.In water, ether, chloroform, all do not dissolve, easily molten among the HCl, slightly soluble among the 0.1mol/L HCl (1g:250ml), soluble,very slightly in the methanol.The present invention is surprised to find, the mixed solvent that employing is made up of glycerol, ethanol, boric acid solution can obtain relatively stable and uniform Imiquimod turbid liquor, thereby realize the purpose of imiquimod development, more how may for the development of imiquimod novel formulation provides for other preparations such as gels.
Especially, many antiseptic may destroy gel.The present invention also is surprised to find that, the ethanol in the mixed solvent, or the effective antiseptic of imiquimod gel, and simultaneously, glycerol can also generate glyceroborate with boric acid except that can be used as wetting agent or wetting agent, and bactericidal effect is strengthened.Therefore, Imiquimod turbid liquor of the present invention and pharmaceutical preparation thereof, gel as described need not to add other antiseptic or antibacterial again, just has good anticorrosion or fungistatic effect.
Imiquimod turbid liquor of the present invention and imiquimod gel, preparation technology is simple to operation, and technology be easy to control, good reproducibility is suitable for industrialized great production.Prepared imiquimod gel smooth in appearance, even, fine and smooth is easy to coating.
The specific embodiment
Come further to set forth content of the present invention by the following examples.Described embodiment is in order to understand purport of the present invention better, rights protection scope of the present invention not to be constituted qualification.
Embodiment 1
Imiquimod is crossed 200 mesh sieves, gets imiquimod 50 grams, adds the glycerol moistening of 100 grams, mixing adds boric acid solution (10 gram boric acid are dissolved in the resulting solution of 325 gram water) again, and 100 gram dehydrated alcohol, stir evenly, the suspendible shape liquid that is creamy white promptly gets Imiquimod turbid liquor.
Embodiment 2
Get imiquimod 20 grams, be ground into fine powder, add 50 gram glycerol and carry out moistening and stirring and evenly mixing.Add 120 gram 3.5% boric acid solution and 40 grams, 95% ethanol again, stir evenly, obtain milky suspension solution, promptly.
Embodiment 3
Get 10 gram Acritamer 940s, add distilled water 400g, treat to use filtered through gauze after swelling fully, obtain translucent substrate.Embodiment 1 resulting Imiquimod turbid liquor is joined in the above-mentioned translucent substrate, and the limit edged stirs and makes it mix homogeneously, stirs evenly back Dropwise 5 gram triethanolamine, stirs while dripping, and the opaque gel that is creamy white promptly obtains the imiquimod gel.
The above-mentioned imiquimod gel that obtains, pH value is 6.89.Granularity 10-50 μ m, product appearance is smooth, and uniform and smooth is easy to coating.Room temperature was placed 30 days, and gel stability is good, and the adjuvant stable in properties with principal agent compatibility does not take place and changes.
Embodiment 4 (contrast test)
4a) prepare the imiquimod gel, wherein add 10 gram azones according to embodiment 3 same procedure.
4b) prepare the imiquimod gel, wherein add 10 gram tween 80s according to embodiment 3 same procedure.
The result shows: investigate from prepared sample appearance, after 4a and 4b added azone, tween, medicine was assembled, and naked eyes are as seen than large crumb.
According to above-mentioned preferred embodiment the present invention has been made detailed description.It should be noted that above embodiment is just to illustrating the present invention.Under the prerequisite that does not depart from spirit of the present invention and essence, those skilled in the art can design multiple alternative of the present invention and improvement project, and it all should be understood to be within protection scope of the present invention.