CN101590011A - The lasting release of peptide from pharmaceutical composition - Google Patents

Abstract

The present invention relates to non-intestinal and give patient's solid, the pharmaceutical composition of non-particulate lasting release.Said composition mainly contains (1) solubility, can become the peptide salt of gel and (2) weight to account for 30% pharmaceutically acceptable, monomer soluble carrier at most, it is combined into the solid circles cylindricality, can become gel automatically behind wherein said solid composite and the patient's humoral effect, described gel reaches at least in patient's body and continues to discharge described peptide in three day time.

Description

The lasting release of peptide from pharmaceutical composition

The application submits to August 31 nineteen ninety-five, and application number is 95195473.3, and the invention exercise question is divided an application for " the lasting release of peptide from pharmaceutical composition ".

Invention field

The present invention relates to continue the parenteral of release peptide compositions.

Background of invention

Peptide is parenteral normally, as subcutaneous injection, is degraded in the gastrointestinal tract because they are everlasting.

Many peptide medicaments (as insulin, LHRH and somatostatin) need be in a period of time continuously or repeat medication to patient.But so continuous injection brings inconvenience and discomfort to patient.

Extended release preparation can be in the long time release peptide and needn't duplicate injection.The microcapsule of solid-state poly and matrix, as act on biodegradable polylactic acid-based existing development.Referring to, as the United States Patent (USP) 4,675,189 of the United States Patent (USP) 4,767,628 of Hutchinson and Keat etc.Hydrogel also is used as the extended release preparation of peptide.These hydrogels comprise various polymer, as poly--N-isopropyl amide (NIPA), and cellulose ether, hyaluronic acid, lecithin and agarose come sustained release.Referring to, as PCT application WO94/08623.

Existing some peptides of report can form polymer or insoluble microgranule of solubility when being added in the solution.Referring to, the Pharm.Res.8:1360 of Eckhardt etc. (1991).Recently, the someone has studied and has utilized the probability of these peptide polymers as extended release preparation.Referring to European application patent 0510913A2 (1992); Reach Pharmaceutical Research Vol.1110 Suppl. summary P such as Wan _S291And P _S243(1993) yet, these polymer sustained-release composition require peptides to be dissolved in saline or biologically in the compatible buffers, cultivate then up to forming the liquid crystal gel.

Summary of the invention

Can in the patient body, form the pharmaceutical composition that continues release gels and do not need interim dissolving or cultivate automatically after the invention provides administration.The peptide salt that the present invention is based on some solubilities can be mixed with parenteral to be continued the gel preparation that discharges and need not add any biologically degradable polymer or other carrier matrix, controls the releasing trend of peptide.After peptide combinations that this is new and the effect of patient body's liquid phase, automatically become glue, discharge continuously in a long time then.Therefore, this new peptide combinations has reduced the volume of known lasting release polymers peptide, the expensive and production time.

Generally speaking, feature of the present invention is with solid, non-particulate property, and sustained-release composition is passed through parenteral.Said composition mainly comprises: 1) solubility, can gelatigenous peptide salt, and 2) account for weight 30%, the soluble carrier of pharmaceutically useful monomeric form, be combined into the solid circles cylindricality, wherein after this solid composite and the mutual effect of patient body's liquid phase, can become glue automatically, and in the patient body, reach at least and continue release peptide in time of three days.

The present invention also has semisolid, and the drug suspension that continues to discharge is used for the feature of patient's parenteral.This suspension mainly comprises: 1) soluble, can gelatigenous peptide salt and account for the pharmaceutically useful of weight 30%, soluble carrier, and 2) be lower than the required quantity of solvent 50% that is used for dissolving peptide salt, preferred 20% or 10% solvent is to provide the semi-solid state of this suspension, automatically form gel after wherein semi-solid suspension and the effect of patient body's liquid phase, in the patient body, reach at least in time of three days and continue release peptide.

Feature of the present invention is selected the solubility of peptide and can be used to produce solid preparation for gelatigenous peptide salt a kind of in addition, and the latter can reach in time of three days at least, release peptide continuously in the patient body.That this medicine comprises is soluble, can gelatigenous peptide salt, and account for weight the most nearly 30% pharmaceutically useful, the soluble and monomeric carrier.

In addition, feature of the present invention also has a kind of solubility of selecting peptide and can gelatigenous peptide salt be used to produce the preparation of semi-solid form of suspension, and the latter can reach in time of three days at least, release peptide continuously in the patient body.This medicine comprises 1) soluble, can gelatigenous peptide salt and account for weight the most nearly 30% pharmaceutically useful, soluble carrier, and 2) be less than 50% be used for dissolve the solvent of required quantity of solvent of peptide salt so that the semi-solid state of this suspension to be provided, automatically form gel after wherein semi-solid suspension and the effect of patient body's liquid phase, in the patient body, reach at least in time of three days and continue release peptide.

On the other hand, give patient's peptide medicament and to make it reaching the method that continues release peptide at least in three days also be feature of the present invention.This long-time continuous release medicine is the parenteral by solid composite medicament, as intramuscular, subcutaneous, intradermal or endoperitoneal disposable injection are finished, wherein this solid composite medicament comprises soluble, can gelatigenous peptide salt, and account for weight the most nearly 30% pharmaceutically useful, solubility, the carrier of free state is (as mannitol, Sorbitol or lactose), wherein automatically form gel after this solid composite and the effect of patient body's liquid phase, in the patient body, reach at least in time of three days and continue release peptide.

" can become glue peptide salt " used herein is meant the peptide salt that contacts formation gel in back with body fluid.Whether a kind of peptide salt " can become glue " and whether required biological activity is arranged, and can pass through the external of the following stated, records in the in vivo test.Term " peptide " refers to natural or synthetic, comprises two or more amino acid whose molecules, is connected with another amino acid whose amino by an amino acid whose carboxyl to each other.Therefore, this term comprises polypeptide and protein.When the peptide salt of " solubility " is meant 7.0,25 ℃ of PH, in water, has 0.1 mg/ml, the peptide salt of preferred 1.0 mg/ml dissolubility.

Term " bioactive analogue " reaches " analog " and is used interchangeably at this paper, comprise natural existence, reorganization and synthetic peptide and derivant or fragments of peptides, as N-or the adorned peptide of C-end structure, they have and essentially identical excitement of the peptide of naturally occurring or unmodified or antagonism.

Be applicable to that peptide of the present invention comprises growth hormone (GH), growth hormone-releasing peptide (GHRP), somatotropin releasing factor, epidermal growth factor, interferon, insulin, somatostatin, Magainin, calcitonin, calcitonin gene related peptide (CGRP), dextrin, parathyroid hormone (PTH), parathyroid hormone-related peptide (PTHrp), gastrin, gastrin release peptide (GRP), melanotropin (MSH), thyroliberin (ACTH), lutropin (LH), luteinising hormone-releasing hormo (LHRH), cell kinase, sorbose (sorbine), cholecystokinin, glucagon, glucagon-like albumen (GLP), gastrin, enkephalin, neuromedin, Endothelin, P material, neuropeptide tyrosine (NPY), peptide YY (PYY), vasoactive intestinal polypeptide (VIP), pituitary adenylate cyclase activating oligopeptide (PACAP). bradykinin, thyrotrophin-releasing hormone (TRH), the bioactive analogue of beta cell methylatropine bromide (fragment of ACTH) or preceding mentioned peptide.

The preferred solubility of the present invention, the salt and the analog thereof that can gelatigenous peptide salt comprise somatostatin, as SOMATULINE (BIM 23014C) (Kinerton, Ltd.Dublin, Ireland, referring to, as Johnson etc., Eur.J.Endocrinol.130:229-34,1994), the salt of calcitonin and analog thereof, the salt of LHRH analog such as antagonist " GANIRELIX " (GRX; Referring to, as Nestor etc., pharmaceutical chemistry magazine, 35 (21): 3942-3948,1992), and GH, GRF, PTH, the salt of PTHrp and their bioactive analogue.

The example of preferred salt be those and pharmaceutically useful organic acid (as acetic acid, lactic acid, maleic acid, the acid of Chinese holly edge, malic acid, ascorbic acid, succinic acid, benzoic acid, methanesulfonic acid, toluenesulfonic acid) salt that is become and with mineral acid such as halogen acids (hydrochloric acid), sulphuric acid or phosphoric acid) salt that become.

Of the present inventionly become glue peptide salt and pharmaceutically useful monomeric form, soluble carrier is compound so that produce and/or administration.The example of carrier comprises polyalcohols, and is sugared as glucose and lactose as mannitol and Sorbitol, surfactant, organic solvent and polysaccharide.

Solid composite of the present invention can produce diameter less than 3 millimeters, and preferred cylindrical less than 2 millimeters is so that use the normal sleeve administration.Gel is release peptide more than 14 days continuously preferably, more preferably at least 30 days.

The present invention also comprises semisolid suspension.Term " semi-solid suspension " and " semi-solid combination " are common to the finger thickness at this paper, the float of peptide salt in liquid flux such as sterilized water of pasty state.Semi-solid suspension of the present invention comprises 1) solid, solubility can gelatigenous peptide salt and is accounted for the most nearly 30% pharmaceutically useful soluble carrier of weight; And 2) solvent, as water-soluble solvent such as sterilized water, its consumption be less than dissolving peptide salt required quantity of solvent 50%, preferred 20% or 10% so that semi-solid state to be provided.Suspension is also by the disposable drug administration by injection of parenteral, and becomes glue behind patient's humoral effect automatically.Solvent in the float must be less than all required amounts of dissolving of peptide salt as the amount of (water), that is to say, the ratio of peptide and solvent must be greater than the dissolubility of peptide, in water, when PH7.0 and 25 ℃, is 26.0 mg/ml as the analog SOMATULINE of somatostatin.

The present invention is a feature to form the gel that continues to discharge in the patient body also in addition.Peptide medicine composite comprise solubility, can gelatigenous peptide salt and account for pharmaceutically useful, the soluble carrier of weight maximum 30% and one or more patients' body fluid.Wherein peptide salt automatically forms gel in the patient body with after the effect of patient body's liquid phase, reaches at least in time of three days to continue release peptide in the patient body.This pharmaceutical composition that can form gel can be solid, perhaps can comprise solvent, and as sterilized water, its consumption is less than 50% of the required quantity of solvent of dissolving peptide salt, so that the semi-solid state of pharmaceutical composition to be provided.

On the other hand, feature of the present invention also is to make the method for solid composite medicament, it be pass through a) with solubility and can gelatigenous peptide salt and account for weight the most nearly 30% pharmaceutically useful soluble carrier mix, make mixture; B) this mixture and liquid excipients are combined to form semi-solid preparation; C) make semi-solid preparation be squeezed into extended silk; D) long filament is cut into semi-solid cylindricality spillikin and e) dry semi-solid spillikin, form solid cylindricality spillikin, its diameter is preferably less than 2 or 3 millimeters.

In addition, feature of the present invention also is semisolid, the lasting injecting systems that discharges the drug suspension administration.This system comprises that a) first syringe has a hollow needle, an end tool nozzle, and the opening part of the other end stretches out a slidably plunger, is adorning solubility and can gelatigenous peptide salt in the hollow needle between nozzle and plunger; B) another syringe also has a hollow needle, and an end is an outlet nozzle, and the plunger of the other end for sliding in the pin bucket stretches out the pin bucket by an opening, adorning pharmaceutically useful aqueous carrier between outlet nozzle and plunger; C) contain an adapter of liquid conduits, adapter can couple together the nozzle of first syringe and the outlet nozzle of second syringe, thereby liquid is transmitted to nozzle by outlet nozzle; And d) film that temporarily seals that is arranged in second syringe is used for can becoming gel peptide salt to separate liquid-carrier and first syringe, wherein enough big masterpiece is used for the plunger of second syringe, can make this film rupture, liquid-carrier in second syringe flows into first syringe by adapter and can become gel peptide salt to mix, form semisolid, the drug suspension of sustainable release.

Unless otherwise indicated, all the implication with ordinary person's common sense of the technical field of the invention is identical for all technology used herein and scientific terminology.Although method similar or identical with this paper and material also can be used to put into practice the detection of maybe this invention, still preferred following method and material.Other features and advantages of the present invention will be set forth in detailed description and claims.

Brief description of drawings

Fig. 1 is the comparison of solid and semi-solid medicament compositions in-vitro release rate and transhipment curve.

Fig. 2 rate of release that to be external surface activating agent TWEEN 80 and carrier hyaluronic acid come out from solid composite medicament to peptide and the influence of transhipment curve.

Fig. 3 is to the rate of release of solid composite medicament and the influence of transhipment curve about external monosaccharide.

Fig. 4 is the influence of the different-diameter of solid composite medicament to its rate of release and transhipment curve.

Fig. 5 is the peptide standard solution of various dose in time a blood drug level comparison diagram in the Mus body.

Fig. 6 is the comparison of the transhipment curve of the solid peptide combinations blood level of various dose in the Mus body.

Fig. 7 is that the transhipment curve ratio is in the blood of the solid composite medicament of two various dose in the Mus body.

Fig. 8 is that the transhipment curve ratio is in the blood of the solid composite medicament of three various dose in the Mus body.

Fig. 9 is that the concentration ratio of various criterion peptide solution and solid composite peptide in blood is in time in the Canis familiaris L. body.

Figure 10 is that the concentration ratio of various criterion peptide solution and solid composite peptide in blood is in time in the Canis familiaris L. body.

Figure 11 is that the concentration ratio of various criterion peptide solution and solid composite peptide in blood is in time in the Canis familiaris L. body.

Figure 12 be to Canis familiaris L. with behind the solid composite of high dose (500 micrograms/kilogram SOMATULINE) very, peptide is transported curve chart in blood.

Figure 13 be to Canis familiaris L. with the solid composite medicament that contains carrier after peptide in blood, transport curve chart.

Figure 14 be the peptide of a certain given dose respectively with standard solution, after solid composite or the semi-solid aerosol form administration, the comparison of blood drug level in the Canis familiaris L. body.

To be peptide be used for behind the Canis familiaris L. situation of blood transhipment curve in 5 days by the form of semi-solid float to Figure 15.

To be peptide be used for behind the Canis familiaris L. situation of blood level transhipment curve in 56 days with the form of the semi-solid float of high dose (6 mg/kg) transhipment curve to Figure 16.

Figure 17 is after semi-solid float and poly-actic-ethylene glycol microsphere are given the Canis familiaris L. medication respectively, and the situation of blood level transhipment curve relatively in 15 days.

Figure 18 is a kind of side cross-sectional views that is used to inject the syringe-like device of semi-solid medicament suspension.

Detailed Description Of The Invention

The present invention relates to pharmaceutical composition (such as solid shape pillars or semi-solid suspension), and for the novel injector sampling device that composition is injected in the patient body, in a single day this pharmaceutical composition enters the gel that just can automatically form sustainable release in the patient body. The syringe-like device is used for the administration of semi-solid suspension, and the sleeve pipe of standard is used for the administration of solid composite.

At least the dose that comprises every daily dose fate product active with it of this peptide composition in each unit of new compositions. After its component contacts with body fluid and automatically becomes gel, this peptide just discharges from the gel of sustainable release composition according to the blood level curve, its blood level curve and known sustained-release composition (for example polymer peptide formulations) or suitable with the peptide blood level curve of infusion pump continuous drug administration by injection every day of stable transhipment mode operating.

The peptide that is suitable for pharmaceutical composition

When the peptide salt in can be used for the present composition gives patient, in body fluid such as lymph liquid or serum, must can become gel, behind the one-tenth gel, must be able to control peptide and under a speed that is suitable for using as drug therapy, discharge. For example, following embodiment is described, the gel of the analog SOMATULINE of growth hormone-release inhibiting factor is under enough dosage, can keep that peptide concentration reaches one month in the blood of at least 1.0 nanograms/milliliter, this is that growth hormone-release inhibiting factor is used for the treatment of the level required such as acromegalia.

The peptide that is preferred for this new compositions comprises growth hormone-release inhibiting factor, calcitonin, parathyroid hormone (PTH), parathyroid hormone-related peptide (PTHrp), solubility activator or the antagonist of LHRH, the excitement of GRF and other these albumen of tool or the solubility analog of antagonism. The peptide that preferably comprises at least one hydrophobic residue is such as the residue naphthyl alanine (Nal) that non-natural exists, the phenylalanine of nor-leucine (Nle) and halo, with naturally occurring residue such as Trp, Ile, Phe, Val, Leu, Met, Ala, GLy, or Cys, they can make peptide better become gel. Amino acid whose hydrophobicity can record by method as described in Publication about Document: Eisenberg Ann.Rev.Biochem.53:595-623 (1984).

The configuration of peptide is preferably modified, and as reducing enzyme degraded by D-type amino acid, forms cyclic peptide by the lactam bond between disulfide bond or two amino acid residue side chains. Suitably these features of peptide are considered to allow or have promoted peptide salt to enter the interior rear gel that automatically becomes of patient body.

Following publication discloses the sequence of PTH peptide and analog thereof: John P.Bilezikian (ed.) parathyroid gland basis and clinical concept 239-58 page or leaf (Raven Press, NH 1994); Nissenson etc. " 26S Proteasome Structure and Function of parathyroid hormone and parathyroid hormone releasing hormone receptor ", acceptor, 3:193-202 (1993); Bachem California 1992-1993 catalogue (Torrance, CA); And Sigma peptide and amino acid/11 994 catalogues (St.Louis, MO).

Following publication discloses PTH_rpThe sequence of peptide and analog thereof: Yasuda etc., journal of biological chemistry, 264:7720-7725 (1989); And Burtis, W.J., clinical chemistry, 38 (11): 2171-2183 (1992). Can see more examples in the Publication about Document: PCT Application 94/01460 (1994); PCT Application 94/02510 (1994); PCT Application 93/20203 (1993); PCT Application 92/11286 (1992); PCT Application 93/06846 (1993); PCT Application 92/10515 (1992); PCT Application 92/00753 (1992); EP Application 477885 A2 (1992); EP Application 561412 A1 (1993); EP Application 451867 A1 (1991); German Application 4203040 A1 (1993); U.S. Patent No.4,771,124 (1988); U.S.Patent No.4,656,250 (1987); U.S.Patent No. 5,229,489 (1993); And Bachem California 1993-94 Catalog, 30-34 (1993).

Following publication discloses the sequence of somatostatin analogues:

PCT Application WO 91/09056 (1991)；EP Application 0 505 680 A1(1992)；EP Application 0 363 589 A2(1990)；EP Application 0 203 031 A2(1986)；U.S. Patent No.4,904,642(1990)；U.S. Patent No.4,871,717(1989)；U.S. Patent No.4,853,371(1989)； U.S. Patent No.4,725,577(1988)；U.S. Patent No. 4,684,620(1987)；U.S. Patent No.4,650,787(1987)；U.S. Patent No.4,603,120(1986)；U.S. Patent No.4,585,755 (1986)；U.S. Patent No.4,522,813(1985)；U.S. Patent No. 4,486,415(1984)；U.S. Patent No.4,485,101(1984)；U.S. Patent No.4,435,385(1984)；U.S. Patent No.4,395,403 (1983)；U.S. Patent No.4,369,179(1983)；U.S. Patent No. 4,360,516(1982)；U.S. Patent No.4,358,439(1982)；U.S. Patent No.4,328,214(1982)；U.S. Patent No.4,316,890 (1982)；U.S. Patent No.4,310,518(1982)；U.S. Patent No. 4,291,022(1981)；U.S. Patent No.4,238,481(1980)；U.S. Patent No.4,235,886(1980)；U.S. Patent No.4,224,190 (1980)；U.S. Patent：No.4,211,693(1980)；U.S. Patent No. 4,190,648(1980)；U.S. Patent No.4,146,612(1979)；U.S. Patent No.4,133,782(1979)；Van Binst et al.， Peptide Res.， 5：8(1992)；Prevost et al.， Cancer Res.， 52：893 (1992)；and Bachem California 1993-1994 Catalog 94-95 (1993).

Following publication discloses the sequence of GRF analog:

PCT Application WO 91/18998(1991)；PCT Application WO 92/：18537(1992)；PCT Application WO 92/00095(1992)；PCT Application WO 91/03053(1991)；EP Application 314866 A2(1989)；EP Application 136475 B1 (1991)；EP Application 320785 A2(1989)；U.S. Patent No. 4,732,972(1988)；U.S. Patent No.4,627,312(1986)；EP Patent Application 511003 A1(1992)；and Bachem California 1993-1994 Catalog 64-65(1993).

Following publication discloses the sequence of p-GLU-HIS-TRP-SER-TYR-D-TRP-LEU-ARG-PRO-GLY-NH2:

U.S. Patent No.4,307,083；U.S. Patent No.4,292,313；U.S. Patent No.4,124,577；U.S. Patent No. 4,111,923；U.S. Patent No.4,101,538；U.S. Patent No. 4,101,537；U.S. Patent No.4,093,611；U.S. Patent No. 4,087,419；U.S. Patent No.4,087,418；U.S. Patent No. 4,087,417；U.S. Patent No.4,083,967；U.S. Patent No. 4,062,835；U.S. Patent No.4,031,072；U.S. Patent No. 4,031,070；U.S. Patent No.4,031，069；U.S. Patent No. 3,824,227；U.S. Patent No.3,824,065；Rivier et al.， J. Med.Chem.， 29：1846(1986)；Ljungguist et al.， Proc. Natl.Acad.Sci.，USA， 85：8256(1988)；Coy et al.， Amer， Clin.Res.， 10：139(1978)；Sundaram et al.， Life Sci.， 28：83(1981)；Rivj.er et al.， Life Sci.， 23：869(1978)； Humphrey et al.， U.Med.Chem.， 21：120(1978)；and Bachem California 1993-1994 Catalog 67-68(1993).

Following publication discloses the sequence of calcitonin analog:

EP Application 464549A1(1992)

and Bachem California 1993-1994 Catalog 28(1993).

The in vitro test of applicable peptide salt

Can by simple in vitro tests detect use for peptide salt in the present invention feasibility.The peptide salt of powder or form of suspension, with body fluid such as lymph fluid, blood plasma, or serum mixes in a container.This container is heated to 30 ℃ in water-bath or oil bath, whether perusal forms gel.

Can external optical diffraction test also can be used for detecting body fluid and be applicable to the present invention.As pulverous peptide salt, mix on microscopical microscope slide with the water of weight 20-50%, abundant mixing, after 5 minutes, reverse microscope as

AXIOVERT100 is last to analyze microscope slide with polarized light, if diffraction has taken place polarized light, shows by there being very bright light, the peptide salt formation has been described gel, and be applicable to the present invention.

Another in vitro tests is used to study the release characteristics of solid of the present invention and semi-solid combination.It utilizes MICROETTE ^TMCorium spreads cell down, and (Hanson Research, Palo Alto CA) as receiving the sample system automatically, comprise six constant temperature cells, a mechanical agitation and a sample divider.At the SOMATULINE that is used to study the solid circles cylindricality ^TMThe experimental condition of transhipment curve in, automatically it is as follows to receive the sample system: release medium=NaCl 0.9%, initial volume=7 milliliter, excellent heavy=1.6 to 1.8 milligrams, temperature=37 ℃, stir speed (S.S.)=60 rev/min, final stir speed (S.S.)=400 rev/mins (continuing 15 minutes) and replace volume=481 microlitres.Respectively 4,10,20,40,65,90, sampling in the time of 180 and 270 minutes.

The sample of collecting in the automatic collector is gone up in high pressure liquid chromatography (HPLC) and is analyzed, and (Teknokroma, Barcelona Spain) go up quantitatively in the Hewlett of tool automatic injector Packard series 1090 liquid chromatograph.UV, visible light diode analyser is used for analyzing.

Use the NUCLEOSIL of 25cm X4.0mm diameter ^TMThe C-18 post.The experimental condition of HPLC is as follows: component A=0.1%TFA is in AcCN: H ₂O (80: 20); B component=0.1%TFA in water, flow velocity=0.9 ml/min, volume injected=20 microlitres, temperature=room temperature, detection=UV-280 nanometer and acquisition time=20 minute.SOMATULINE ^TMRetention time be 14 minutes as calculated.The gradient system that is used for HPLC is listed in table 1.

Table I

Time (minute)	% component A	The % B component
			0	25	75

17	69.2	30.8
			19	25	75
25	25	75

Continue the in vivo test of release peptide

If a specific peptide salt can form gel in above arbitrary in vitro tests, detect the feasibility that this peptide salt is used for animal and human's treatment with regard to available in vivo test.The blood level transhipment curve of peptide salt can pass through to injection peptide salt in animal such as Sprague Dawley rat or the Canis familiaris L. body, at specified time interval, as 1-5 days per hour being the interval, or 5-45 days with per 12 or 24 hours when at interval, blood sampling is measured peptide concentration wherein and is obtained.Hence one can see that the gel of a peptide or the feasibility that peptide/carrier gel is used for this peptide treatment administration.

Animal is anaesthetized with pentobarbital (is 60 mg/kg i.p. for rat), and the jugular vein intubate is used for blood sampling.The peptide of surveying such as SOMATULINE ^TMSemi-solid suspension or solid composite (or being used for correlated standard solution) with given dose as 1.0,3.0 or 6.0 milligrams of SOMATULINE ^TM/ kilogram subcutaneous injection.After peptide combinations or solution feed in the body, obtain the blood sample of heparinization, the centrifugal blood plasma of getting by intubate at the interval of setting.The amount of peptide obtains by the radioimmunoassay of standard in the blood plasma.This technology does not need to extract peptide from Mus blood plasma, can directly measure the amount of peptide.A blood level release profiles is set up in the data drawing (the blood level nanograms/milliliter is to the time) of gained.

In addition, the existence of peptide also can be by any biological respinse indirect determination of animal to peptide in the animal body.The analog of a somatostatin for example, its effect and exist the inhibitory action that can discharge to record by the growth hormone that in code test, GRF is caused.In the patient body, also available this round-about way comes detection of peptides.

If monitoring 1-3 days, this in vivo test just can be used for detecting the gel that can a specific peptide form the sustainable release of expectation in vivo.If can be at treatment level, as the lasting release of peptide was provided at least in 3 days, this peptide be just applicable to the present invention.The complex that this test also can be used to detect a peptide salt or peptide and carrier is used for the effectiveness of the particular treatment of particular animals, and requires contrast with the blood drug level release profiles by the known dose with a peptide and specified disease, obtains the dosage of necessity.For example, the known treatment acromegaly must be kept blood drug level 1.0 nanograms/milliliter of the analog of somatostatin.Similarly, this test can be used to estimate that peptide salt is used for the desired effects and the dosage of concrete human disease treatment.

The carrier that pharmaceutical composition is suitable for

Although the peptide salt that has some can become gel is as SOMATULINE ^TMSalt, can directly make solid composite and do not need any carrier, but compositions of the present invention also can make by utilizing with the compound carrier of peptide homogeneous phase.Carrier should be water miscible, monomeric form, and can directly be eliminated by human body.Preferably has carrier less than 1000 Dalton molecular weights.The selection of carrier will make its physical property of compositions tool, but not appreciable impact compositions continues the feature of release.In fact, as described below, some carriers can be used to reduce or improve the transhipment time of rate of release and compositions.

Carrier applicatory comprises surfactant such as TWEEN80, polyalcohols such as mannitol and Sorbitol, monosaccharide such as lactose and glucose, organic solvent and polysaccharide.

The method for preparing solid composite medicament

Preparation method of the present invention has been avoided the problems of dissolution of many peptides because before injection unnecessary dissolving peptide.Another superiority of solid composite of the present invention is its stability.Anhydrous solid composite has been avoided degraded, and relevant with aquation extended release preparation such as hydrogel problem such as solidify is piled up in crystallization.

Below be the mixing of peptide and carrier, and with the solid composite medicament of gained by pack into the method for syringe of the trocar.

With carrier, as Sorbitol, be dissolved in the liquid excipient of preparation usefulness, in water or organic solvent, gained solution mixes with required peptide, forms the homogeneous phase semi-solid mixtures.If final solid composite does not contain carrier, then peptide is only mixed forming semi-solid mixtures with water or other liquid excipient.Then semi-solid mixtures is transferred to and had in the extrusion chamber of extruding jet nozzle that plunger or spiral and internal diameter are the 0.5-3 millimeter, as a rustless steel syringe or a charging crush zone.Squeeze out mixture, be cut into the spillikin of certain-length, collect then, finish-drying under the vacuum, preferred final diameter are 2 or 3 millimeters club.Has the extended spillikin of expecting the cross section after can utilizing various prior arts to make non-solid material make drying by sieve plate.

Preparation can be by evaporation with carrier, and lyophilization or vacuum drying are removed, and measure the exact mass percentage ratio that peptide accounts for spillikin then, just the per unit length cylinder thing suitable dosage.Get five spillikins for every batch, weigh, remove all peptides through certain program then, as be dissolved in appropriate solvent as 0.1% acetic acid aqueous solution, the peptide amount of proposition with as above-mentioned in vitro tests in the standard HPLC method used record.Before the use, also to recently detect its uniformity by the weight/length of calculating spillikin.The length and the weight of five cylinder things of amount calculate ratio.As long as relative error (RSD) can be passed through less than 5%.RSD=[SD _{Length/weight ratio}/ average _{Length/weight ratio}] X100, therefore, it also is a tolerance of length weight ratio uniformity.

After spillikin is received, just can decide dosage by the measurement of length and weight.According to the peptide concentration that calculates, spillikin is cut into the pairing length of desired amount, before administration, on balance, spillikin is weighed, then, the hollow needle of just it can being packed into is in sleeve pipe.

Syringe needle with cap seal good after, the trocar is inserted from behind, funnel-form is preferably adopted at the rear portion of pin, so that the insertion of solid spillikin.Metal plunger promotes spillikin then, and spillikin is pushed in the patient body from syringe needle.

In the embodiment preferred, the rear portion of the trocar is connected to aseptic rustless steel, plastics or glass cylinder, and here semi-solid combination is extruded, and shears drying.Cylindrical position is fallen in the needle tubing by gravity after will making the spillikin drying.The trocar that installs in advance then and its metallic piston system and activation system are connected on the sleeve pipe of standard.

The method for preparing semi-solid float and freeze-dried composition

The preparation of semi-solid float available with prepare identical peptide and the carrier of solid composite, and compare with solid composite, semisolid peptide suspension will form high thickness or paste composition with the aqueous solvent (as sterilized water) of weight 10%～90%.Water preferably adds before compositions is soon used to patient again.

Semi-solid float can promptly be pushed with the same procedure of above-mentioned solid composite preparation and be made, but does not have the step of removing excipient at last.Semi-solid extruding spillikin can be with the apparatus of a syringe-like, and the interior or exsiccant solid spillikin aquation before injection of patient body of directly injecting as described below forms semi-solid float.

Semi-solid combination also can make by cryodesiccated method, and it has simplified the dosage unit control procedure, and compositions is packed into before the needle tubing, can simply sterilize.At first, will contain carrier or carrier-free peptide, and be dissolved in the water, gained solution is depressed adding, and has the syringe degerming of plunger by 0.22 micron filter such as utilization.After having filtered, solution must be operated under aseptic condition.Utilize as accurate control volume such as micro-pipette,, compress freeze dried solid with piston under the vacuum the sterile solution lyophilization in the syringe that seals of packing into.

The syringe of the sterile solid that compresses will be housed then, pack under the vacuum, with this understanding, but the maintenance of solid composite long period is stable, and does not need storage condition freezing or that other is special.Before administration, only need, as utilize the following two parts device that contains volume required sterilized water in the syringe-like cylinder that separates the solid composite water hydratable.Cryodesiccated solid aquation once more forms the heavy-gravity semi-solid float that can be used for to patient injection.

Do not wish to obtain the solution of peptide combinations, in a single day because inject in the body, solution will scatter, and can't form the gel that this invents described lasting release.Therefore, answer the careful selection amount of water, make it to be less than the aequum that dissolves a certain amount of peptide combinations, for example, 25 ℃, PH7.0 is for avoiding forming solution, 26 milligrams of SOMATULINE ^TMAcetate only need 1.0ml or water still less.Use is less than institute's water requirement of 50% dissolving peptide salt, preferably is less than 20% or 10% water.Can guarantee to form semisolid or pulpous state float rather than solution.

In the embodiment preferred, pin links to each other with the cylinder of syringe by a funnel-form adapter, and the funnel-form adapter can be the part of pin or syringe.Pin can be fixed on the syringe or before using and set up, according to different injection paths, as intramuscular, Intradermal or subcutaneous, reelects the pin of different length and external diameter.The inner surface preferred smooth of pin to help the injection of semi-solid combination.

The less diameter of plunger of the preferred tool of syringe (1～5 millimeter) so that very a spot of semi-solid combination (10～300 microlitre) just can form one section length clearly in the syringe bucket, thereby can carry out vision and dosage measurement more accurately.

Compositions embodiment

Embodiment 1:100% SOMATULINE ^TM Solid composite

140 milligrams of water are added somatostatin analogues SOMATULINE ^TM(Kinerton, Ltd. is among the Dublin, 60 milligrams of acetates Ireland).Unless specified otherwise is at the following SOMATULINE that shows ^TMExample in, all use SOMATULINE ^TMAcetate.Mixture after the spatula kneading, joins in the rustless steel syringe in 2 milliliters plastic injector, and the rustless steel syringe has the squeeze bulb of 5 millimeters chambers of an internal diameter and 2.5 millimeters internal diameters.Mixture is under the effect of syringe pump, and by syringe extruding filamentation, the silk that obtains is cut into 3 centimetres spillikin and is collected on the microscope slide.Vacuum drying spillikin 24 hours, the spillikin that the diameter of gained is 1.4 millimeters contains 10 milligrams of SOMATULINE ^TM/ centimetre.Spillikin is packed in the trocar of 1.5 millimeter 3 centimeter length of internal diameter.

Embodiment 2:80%SOMATULINE ^TM , the solid composite of 20% mannitol

With reference to the flow process of embodiment one, at first (Roquette, Lestrein France) mix formation solution with 9 gram water with 1 gram mannitol.0.140 this solution of gram is added to 0.060 gram SOMATULINE ^TMIn, the filament of extruding is collected on the microscope slide after shearing, vacuum drying 24 hours, and 2.9 centimetres of spillikins of gained contain 40 milligrams of SOMATULINE ^TM(the SOMATULINE of weight 20% mannitol and weight 80% ^TM).

Embodiment 3:100%SOMATULINE ^TM Semi-solid float

To 300 milligrams of SOMATULINE ^TM100 milligrams of water of middle adding prepare semi-solid float.The gained mixture is kneaded with spatula in 5 milliliters of plastic injectors.Adorn 200 milligrams of semi-solid combinations (60 milligrams of peptides) in each syringe.

Embodiment 4:80%SOMATULINE ^TM , 20% semi-solid float

Mix 0.1125 milligram of mannitol and 14.8875 gram water formation carrier solutions.400 milligrams of SOMATULINE ^TMBe dissolved in 14.60 these carrier solutions of gram.Pack in each plastic injector then 2.0 milliliters of gained solution and lyophilization.The gained solid is depressed into volume 100 microlitres with plunger.Before the administration,, make it to form semi-solid float with 133.33 microliters of water aquation solid composites.

Embodiment 5:90%SOMATULINE ^TM , 10% Sorbitol solid composite

(Roquette, Lestrein France) mix formation solution with 9.5 gram water with 0.5 Keshan pears sugar alcohol according to the method for embodiment 2.0.140 this solution of gram is added to 0.060 gram SOMATULINE ^TMIn, mixture is weighed, and kneads extruding.After the silk that is pressed into is sheared, be collected on the slide, vacuum drying 24 hours, 2.5 centimetres of spillikins of gained contain 3.5 milligrams of SOMATULINE ^TM(the SOMATULINE of weight 10% Sorbitol and weight 90% ^TM).

Embodiment 6:84%SOMATULINE ^TM 16% Tween 80 solid composite

Method according to embodiment 2 is mixed 0.8 gram Tween 80 (Sigma, St.Louis Mo) and 9.2 gram water, makes 8% Tween 80 carrier aqueous solution.0.140 this carrier solution of gram is added to 0.060 gram SOMATULINE ^TMIn, mixture is weighed, and kneads extruding.After the silk that is pressed into is sheared, be collected on the slide, vacuum drying 24 hours, 2.5 centimetres of spillikins of gained contain 3.5 milligrams of SOMATULINE ^TM

External comparing embodiment

Following examples have been proved the effectiveness of various modifications of solid semi-solid combination of the present invention and invalid.

Embodiment 7: the comparison of solid and semi-solid combination

Detect 100%SOMATULINE with above-described in vitro tests ^TMSolid composite and 30%SOMATULINE ^TMWhether the transhipment curve of the semi-solid float of-70% water is different.Contain same dose SOMATULINE in each compositions ^TMThe result as shown in Figure 1.There is not marked difference between two kinds of compositionss.

Embodiment 8: carrier is to the influence of peptide rate of release

Equally observe different carrier to different SOMATULINE with above-mentioned in vitro tests ^TMThe transhipment curve of solid composite and the influence of rate of release.Comprise (1) 100%SOMATULINE ^TM, (2) 86%SOMATULINE ^TMWith 14% Tween 80, (3) 85%SOMATULINE ^TMAnd 15% hyaluronic acid, (4) 90%SOMATULINE ^TMWith 10% Sorbitol and (5) 80%SOMATULINE ^TMWith 20% mannitol.Result of the test is shown in accompanying drawing 2,3.Fig. 2 shows, with 100%SOMATULINE ^TMCompare, hyaluronic acid reduces the transhipment curve, but Tween 80 makes it to raise.Fig. 3 shows, with 100%SOMATULINE ^TMCompare, monomer soluble carrier mannitol and Sorbitol only make rate of release improve slightly.

Embodiment 9: the diameter of solid composite medicament is to the influence of peptide rate of release

Equally also detect the spillikin diameter to SOMATULINE with above-mentioned in vitro tests ^TMThe influence of solid composite transhipment curve and rate of release.Solid composite is by SOMATULINE ^TMAnd mannitol (80: 20) mixture is formed.Studied diameter respectively and be 0.26 and 0.43 millimeter situation.The result of this test as shown in Figure 4.0.26 millimeter of less diameter with compare for 0.43 millimeter than major diameter, rate of release is very fast in the body.In addition, just discharged fully in half time discharging used deficiency of time fully than the major diameter spillikin than the minor diameter spillikin.

Embodiment in the body

Following animal experiment has been proved somatostatin analogues SOMATULINE ^TMThe contrast of the various different solids of acetate, the drug release of semi-solid combination transhipment curve and standard medicinal liquid.

Embodiment 10: in vivo comparison between peptide solution and the formed gel of solid peptide combinations

Study injection SOMATULINE with above-mentioned in vivo test ^TMStandard solution and the 100%SOMATULINE that uses by the present invention ^TMDuring solid composite, the difference of plasma concentration curve.Solution is dissolved in the physiological serum by peptide and makes, then respectively with the dosage subcutaneous injection of 1.0 mg/kg and 0.5 mg/kg.(60 mg/kg, i.p.) anesthesia and right jugular vein intubate are used for blood sampling to rat with pentobarbital.After the operation, before beginning test, rat was recovered two days, with animal be placed on can free active cage in.After giving medicinal liquid, from intubate, obtain the blood sample of heparinization, centrifugalize serum, (RIA) records SOMATULINE in the serum by radioimmunoassay ^TMAmount.RIA does not need to extract peptide from the blood plasma of rat, thereby can directly measure.

Then with 1.5 mg/kg and 3 milligrams of SOMATULINE ^TMThe dosage of/kilogram repeats above test.Result's (average datas of 6 rats) lists in Table II and accompanying drawing 5, and therefrom having shown with dosage and maximum release rate increases, and exists the time to increase in the body.As expected, standard solution at first reaches the peak that a peptide discharges, promptly so-called " peak effect ", stable in time afterwards decline.

Table II

0.5 the Cmax C of peptide in the mg/kg solution _MaxBe 45 nanograms/milliliter, C in the 1.5 mg/kg solution _MaxBeing 78 nanograms/milliliter, is 126 nanograms/milliliter in the 3 mg/kg solution.

Next the 100%SOMATULINE of solid form ^TM(0.5 mg/kg, 1.5 mg/kg, and 3 mg/kg) deliver medicine to rat.Result's (average datas of 5 Mus) lists in Table III and Fig. 6.Even if show in minimum dose 0.5 mg/kg and also have the effect that continues release.Solid composite has been avoided initial " explosion effect " of solution, as the C of 3.0 mg/kg solid composites _MaxBe 39 nanograms/milliliter, and the C of 3.0 mg/kg solution _MaxBe 126 nanograms/milliliter.

Table III

Embodiment 11: the intramuscular injection of solid composite

With the 100%SOMATULINE of four rats with 0.5 mg/kg and 3 mg/kg dosage ^TMSolid composite repeats above test, intramuscular administration.The result as shown in Figure 7.All demonstrating lasting release more than 72 hours, and with the dosage effect of expecting, and do not have the explosion effect that solution produces.

Embodiment 12: the subcutaneous injection of solid composite

With the 100%SOMATULINE of six rats with 0.5,1.5 and 3 mg/kg dosage ^TMSolid composite repeats above in vivo test, subcutaneous administration. gained result such as accompanying drawing 8. as expected, with the increase of medication amount correspondingly, in the blood plasma peptide concentration also increase (during 0.5 mg/kg, C _MaxBe 8.15 nanograms/milliliter, during 1.5 mg/kg, C _MaxBe 11.170 nanograms/milliliter, during 3 mg/kg, C _MaxBe 33.59 nanograms/milliliter).As above the standard solution explosion effect among the embodiment 10 also disappears in addition.

Embodiment 13: the comparison in the Canis familiaris L.

Repeat above test and study peptide solution and solid composite in the intravital pharmacokinetics of Canis familiaris L.. inject the SOMATULINE of 84.8 microgram/kilograms down for five dog skins ^TMStandard solution after, studied its transhipment curve and rate of release. for comparing, on one's body five same Canis familiaris L.s, with suitable dosage 100 micrograms/kilogram subcutaneous injection 100%SOMATULINE ^TMSolid composite has carried out same test.

As shown in Figure 9, plasma concentration has shown that to the time mapping typical case of peptide solution (zero) transports curve, promptly lacks (10 hours), C release time _MaxBe 46.28 nanograms/milliliter (20 minutes time). on the other hand, the pharmacokinetics of solid composite (●) has but shown very big difference. as shown in Figure 9, C _MaxReduce to 3.56 nanograms/milliliter (1 hour time), the release of peptide, the time lengthening that maintains at least 0.1 nanograms/milliliter reaches 120 hours more than ten times more.

Similarly, standard SOMATULINE ^TMSolution (zero) intravenous is with the dosed administration of 100 microgram/kilograms, soon, just reaches C in about 1 minute _Max, i.e. about 807 nanograms/milliliter of plasma concentration. and (accompanying drawing 10).On the other hand, contain the dosage intramuscular administration of the solid composite (●) of 100% peptide, then obtain result very inequality with 100 microgram/kilograms.In the time of 2 hours, solid composite has reached a very low C _Max(1.69 nanograms/milliliter), and forming lasting release profiles more than 96 hours. (accompanying drawing 10)

In another comparative study, give six other dog skins injection SOMATULINE down with the dosage of 200 microgram/kilograms ^TMStandard solution. the result shows C _MaxBe 125.96 nanograms/milliliter (20 minutes time), persistent period less than 24 hours (Figure 11, O=solution). on one's body a group Canis familiaris L., with the solid composite (100%SOMATULINE of same dose (200 microgram/kilogram) ^TM) by identical subcutaneous administration method, repeated and above identical in vivo test.Identical with last contrast test, solid composite has shown diverse release profiles, C _MaxBe 13.26 nanograms/milliliter (1 hours time), the release of at least 0.1 nanograms/milliliter peptide concentration was kept more than 120 hours. (accompanying drawing 11, ●=solid composite)

Embodiment 14: increase the influence of dosage in the body

With with a group Canis familiaris L., identical solid composite (100%SOMATULINE ^TM) subcutaneous administration, repeat above-mentioned in vivo test, but dosage is than embodiment 13 high 5 times (500 μ g/kg).Identical with last embodiment 13, explosion effect is controlled, plasma C _MaxBe 10.62 nanograms/milliliter (4 hours time).In addition, continue the time lengthening to 144 hour (accompanying drawing 12) of release.

Embodiment 15: the influence of body internal surfactants

With containing SOMATULINE ^TMWith surfactant Tween 80 (84%SOMATULINE ^TM, 16% Tween 80) solid composite repeating above-mentioned in vivo test on one's body with a group Canis familiaris L.. with the dosage subcutaneous administration of 100 microgram/kilograms.(compare with accompanying drawing 9) as shown in Figure 13, surfactant has more or less quickened SOMATULINE ^TMThe transhipment curve, promptly improved rate of release and accelerated reaching of initial peak, and more or less reduced the time of lasting release.

Embodiment 16: the semi-solid suspension of subcutaneous injection

Give same animal subcutaneous injection semi-solid float 30%SOMATULINE ^TMAnd 70% water, and 15%SOMATULINE ^TMAnd 85% water, it is 200 microgram/kilograms that dosage is all, and repeats above-mentioned in vivo test. the result shows not to be had obviously different with the solid composite gained result of embodiment 13 median doses.As 24 hours the time, semi-solid combination SOMATULINE ^TMBlood plasma level be respectively 1.76 nanograms/milliliter and 1.61 mg/ml, solid composite is 1.51 mg/ml (accompanying drawings 14).Semi-solid combination also had higher rate of release than solid composite after 2 days. be respectively the former 0.9 and 0.87/ milliliter, the latter is 0.34 nanograms/milliliter. the time of solid and semi-solid combination release peptide all kept 120 hours at least, and standard error is very little.

Embodiment 17: the injection high dose

Six Canis familiaris L.s at the 3rd group are repeated above-mentioned in vivo test on one's body.The SOMATULINE of high dose (3 mg/kg) ^TMMake the semi-solid float (30%SOMATULINE of aquation ^TMAnd 70% water) test intramuscular administration. as shown in Figure 15, the result shows even under so high dosage, the lasting release .C of peptide is also arranged _MaxStill less than 10 mg/ml (925 nanograms/milliliter), the drug level institute's persistent period that is higher than 2.4 nanograms/milliliter in the blood plasma prolongs greatly, to more than 15 days.

With the above-mentioned identical semi-solid float (30%SOMATULINE of high dose (6 mg/kg) very ^TMWith 70% water) repeat above-mentioned in vivo test on one's body four Canis familiaris L.s.Carrying out this high dose test is in order to estimate the limit of rate of release control, as observe a possible what is called " phenomenon of runing away ", promptly under high dose, losing the control of drug release. traditional extended release preparation has maximum percentage ratios that can contain medicine in the preparation, as polylactic acid-glycollic acid (PLA) microsphere is generally 15%.In case reach this highest limit, said preparation has just lost lasting release characteristic and has discharged medicine immediately.This test shows that dosage is SOMATULINE in the blood plasma of 6.0 mg/kg ^TMC _MaxVery high, but still be about in the treatment boundary of 52 nanograms/milliliter.In addition, as shown in Figure 16, the release of peptide still can be controlled and the phenomenon of not runing away, and promptly constantly, discharges in higher level, 1-7 days, is higher than 10 nanograms/milliliter; 8-33 days, about 1-10/ milliliter; And at least 56 days, be higher than 0.1/ milliliter.When dosage is 3 mg/kg, is higher than 7 nanograms/milliliter blood plasma levels and has only kept 1 day (accompanying drawing 15), by comparison, when dosage was 6 nanograms/kilogram, same level was kept 12 days.

The contrast of embodiment 18:PLGA microsphere and semi-solid medicament compositions.

Carry out above-mentioned in vivo test with 6 Canis familiaris L.s and come semi-solid SOMATULINE more of the present invention ^TMCompositions and to contain dosage be 30 milligrams of SOMATULINE ^TMThe transhipment curve of PLGA microsphere (InsenBiotech.Paris, France) and rate of release the dosage of first semi-solid combination among the dosage of microsphere and the embodiment 17 promptly be 3.0 mg/kg compare.Accompanying drawing 17 shows that the plasma concentration curve of semi-solid combination (●) and microsphere (zero) has all surpassed 15 days.

As shown in the figure, compare with the microsphere of load, semi-solid combination has shown better time and dosage control (microsphere was 156 nanograms/milliliter, and semi-solid combination is 2.6 nanograms/milliliter after 4 hours) to explosion effect after 30 minutes.In addition, how many semi-solid combinations demonstrates long holding time, and rate of release is 2.48 nanograms/milliliter in the time of the 15th day, and microsphere is in the time of the 15th day, and rate of release is 1.09 nanograms/milliliter.

Injection device

Being easy to produce the injection device of semi-solid float administrable with prior art. this device is identical with standard syringes, comprises cylindrical tube, the combination of pin and piston.Pin is hollow, has maximum a hole and a slick inner surface, preferred at least No. 6 inner surface.The external diameter of pin and length make according to subcutaneous and intramuscular and are used for selecting.Be used for semi-solid combination is released needle tubing from pin, inject the intravital piston of patient, the same with present disposable syringe, can be rubber or plastics. the piston spillikin that is used to promote stopper is cheap and simple plastic components.

Accompanying drawing 18 is an injection device 10, can be used to note system and injection semi-solid combination.Injecting apparatus 10 comprises empty needle 1, and it is connected on first syringe 3.Being loaded into first syringe 3 as freeze dried solid powder composition 2 also preferably preserves under first piston 6 insertions first syringe 3 final vacuums.Adapter 4 comprises vertical hole 13 of 12 of first end, 11, the second terminal 12 and first terminal 11 and second ends.First end 11 is connected on first syringe 3, and second end 12 links to each other with second syringe 7.Pin 1 is loaded in vertical hole 13, and adapter 4 preferred plastics or metal are made.Sterilized water 15 is packed in second syringe 7, and the resistance sheet 20 that is positioned at has wherein prevented that water is by second syringe 7 flowing to first syringe 3.But resistance sheet 20 is made as thin metal foil or plastic foil preferably by perforated material.Resistance sheet 20 is broken by the power that piston 9 presses down, and resistance sheet 20 1 is broken, and plunger 9 can further press down, thereby forces water 15 to enter first syringe 3 from second syringe 7 by pin 1.It is very crucial with separating of injector wall to avoid hindering sheet, so that it does not enter first syringe.The interaction of water 15 and solid composite medicament causes forming semi-solid combination in first syringe 3.Then pin 1 is separated from adapter 4 with first syringe 3, be used for giving the patient injection semi-solid combination with standard method.Plug lock 14 prevents the decline of first piston 6, thereby avoids exsiccant solid composite 2 to enter second syringe 7.

In another kind of device, used standard syringe, it links to each other with a plastic tube by central foraminous adapter.Originally do not connect pin on first syringe, but after water and other carrier hole by adapter flowed into from second syringe, pin was connected on first syringe, wherein contains peptide.In this device, the resistance sheet can be contained in the hole or in first syringe.

Other content

The front has given very detailed description to the present invention and details thereof, mainly to be in order saying something, and to be not intended to limit the scope of the invention.Additional claims have been set forth scope of the present invention.Others, advantage and modification are all in claims.

Claims (12)

1. be used for parenteral in the lasting drug suspension form compositions that discharges of patient's semisolid, described suspension mainly comprises:

(1) soluble peptide salt, its with can form gel after body fluid contacts; With

(2) aqueous solvent, its amount be less than dissolving peptide salt solvent amount 50% and keep the semi-solid state of described float, described gel reaches at least in patient's body and continues to discharge described peptide in three day time.

2. the compositions of claim 1, wherein said peptide is the analog of somatostatin or somatostatin.

3. claim 1 or 2 compositions, wherein said quantity of solvent is less than 10% of the required quantity of solvent of the described peptide salt of dissolving.

4. each compositions of claim 1-3, wherein said peptide is Suo Madulin (BIM23014C).

5. claim 1 compositions, wherein said peptide are the analog that short corpus luteum generates releasing hormone (LHRH).

6. each compositions of claim 1-5, wherein said quantity of solvent is less than 10% of the required quantity of solvent of the described peptide salt of dissolving.

7. select the solubility of peptide, the peptide salt that can become gel to continue to discharge purposes in the medicine at the semi-solid form of suspension of producing parenteral, this suspension can reach at least in patient's body and continues in three day time to discharge described peptide, and described medicine comprises:

The described solubility of described peptide, can become the peptide salt of gel; With

Aqueous solvent, its amount be less than dissolving peptide salt solvent amount 50% and keep the semi-solid state of described float,

Can become gel automatically behind wherein said medicine and the patient's humoral effect, described medicine reaches at least in patient's body and continues to discharge described peptide in three day time.

8. the purposes of claim 7, wherein said peptide is somatostatin or somatostatin analogues.

9. claim 7 or 8 purposes, wherein said peptide is Suo Madulin (BIM23014C).

10. the purposes of claim 7, wherein said peptide are the analog that short corpus luteum generates releasing hormone (LHRH).

11. the purposes of claim 7, wherein said gel continue to discharge described peptide at least 14 days.

12. the purposes of claim 7, wherein said quantity of solvent are less than 10% of the required quantity of solvent of the described peptide salt of dissolving.

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