CN1187824A - Novel protein and process for producing same - Google Patents

Abstract

A protein having amino acid sequence in SEQ ID No.:1 of the Sequence Listing derived from human MP52, and a dimer protein thereof. A homodimer protein described above can be obtained by constructing a plasmid containing DNA coding amino acid sequence in SEQ ID No.:1 of the Sequence Listing with a methionine at the N-terminus, introducing the plasmid into E. coli for transformation, solubilizing inclusion bodies obtained by culturing the transformant, purifying the monomer protein from the solubilized solution, refolding the monomer protein into a dimer protein and purifying the same. The homodimer protein described above is useful as a pharmaceutical composition for treating cartilage and bone diseases.

Description

Novel protein and preparation method thereof

Technical field

The present invention relates to a kind of protein, it derives from MP52, has the aminoacid sequence of sequence number 1 in the sequence table.The invention still further relates to this proteinic dimer and make the medicament that is used for the treatment of cartilage and osteopathia that activeconstituents forms by this protein dimer.The invention still further relates to a kind of method, with containing the plasmid transformation escherichia coli that to express above-mentioned protein dna sequence, prepare a large amount of, highly purified above-mentioned protein with intestinal bacteria then exactly.In addition, the present invention relates to a kind of methods of treatment, promptly use protein dimer and treat cartilage, osteopathia.Technical background

The medicament that becomes known for now preventing and treat osteopathia has oestrogenic hormon, thyrocalcitonin, Cholecalciferol and derivative thereof, and the derivative of diphosphate etc.The bone forming factor (Delicious peptide: be called BMP later on) of report TGF-β gene superfamily comprises that BMP-2 has the bone forming effect to a series of protein such as BMP-9 recently.

Also there is the protein (WO93/16099 and WO95/04819) of a kind of MP52 of being called of report to have the bone forming effect in addition.It is believed that adult form MP52 is the protein that the N end has 120 residues of L-Ala to form, its aminoacid sequence is described in these applications to some extent.

P.639-643, nature, has also been put down in writing the protein of a kind of GDF-5 of being called among (1994) and the WO94/15949 at Vol.368, and it derives from mouse, and aminoacid sequence is very similar to MP52.

But, prepare these proteinic pure product very also easily with technical scale.

Once attempted application mammalian cell such as L-cell and prepared MP52, but be not easy to prepare a large amount of pure product MP52 by gene engineering.

Disclosure of an invention

Present inventors attempt using intestinal bacteria, prepare MP52 in a large number by gene engineering.Just the codon of coding methionine(Met) is added to from L-Ala begin to encode DNA5 ' end of MP52, prepares MP52 with such intestinal bacteria.Product is not only MP52, but the mixture of MP52, also comprises the protein that the N end forms for 121 residues of methionine(Met), and the N end comes off L-Ala and the protein that forms from 119 residues that proline(Pro) begins, and this is difficult to therefrom isolate purifying MP52.

The terminal combination of DNA 5 ' of aminoacid sequence in the sequence number 1 during the present inventor finds a codon of coding methionine(Met) and code sequence is tabulated, 119 residues formed after the sequence of sequence number 1 was deleted L-Ala by the MP52 N-terminal, make up plasmid like this, express with the intestinal bacteria that imported plasmid then, so optionally the protein of mass production N-terminal sequence number 1 from the sequence table that proline(Pro) begins.

And the present invention confirms that proteinic dimer described in the sequence table sequence number 1 has cartilage and bone forming effect, has finished the present invention thus.

The present invention relates to a kind of protein, it has the aminoacid sequence shown in the sequence table sequence number 1.This protein is made up of 119 residues, and 119 residues are to form after the N-terminal of the maturation zone that 120 residues of people MP52 form is removed L-Ala.Protein of the present invention is water-soluble, and because it derives from the mankind, so the toxicity of self is very little.

In addition, the present invention relates to a kind of be used for cartilage and (or) medicament of osteopathia treatment, it comprises proteinic dimer, and this protein has the aminoacid sequence of sequence number 1 in the sequence table.More specifically, because protein dimer of the present invention has the formation cartilage, the activity of bone, so the present invention relates to be used to prevent and treat the medicament of following disease: osteoporosis, congenital cartilage, osteopathia, the deformability gonitis, arthritis deformans such as deformability femoral joint disease, osteoarthritis, cartilage injurys such as meniscus injury, wound, the bone that tumor resection etc. cause, the regeneration of cartilage defect part, bone and cartilage damaged, fracture, dyschondroplasia, fetal rickets, no cartilage forms, cleft palate, congenital cartilage and osteopathias such as bone forming is bad also have root of the tooth in addition, alveolar is damaged etc.Because protein of the present invention has the activity that forms cartilage, bone, so it can be used for treating the bone transplanting of esthetic surgery.These treatments also comprise the treatment in structive sursery field.

The present invention relates to a kind of method, it is to prepare a kind of protein with intestinal bacteria, and this protein is by shown in the sequence number in the sequence table 1, and 119 amino-acid residues that derive from people MP52 are formed.

In addition, the present invention relates to the structure of plasmid, this plasmid contains the DNA that derives from 119 amino acid residue sequences of people MP52 in the code sequence tabulation shown in the sequence number 1, its 5 ' terminal coding methionine(Met).Only increased in the ripe zone of people MP52 cDNA with polymerase chain reaction (PCR method), wherein make template DNA with containing among the WO93/16099 plasmid vector of cDNA.Here used PCR method is often referred to the micro-fragment of coming DNA amplification or RNA with the method for describing in the United States Patent (USP) 4,683,195.

In order to produce protein of the present invention, be necessary to make up the suitable expression vector that includes this protein dna of encoding, be inserted in the required escherichia coli host with gene engineering then.For mass production protein of the present invention, following two modification methods have been implemented: the method that 1) improves target protein throughput: (agricultural biochemistry such as M.Nobuhara, 52 (6), 1331～1338,1988) method of raising translation efficiency promptly improves the initiator codon ATG method of AT content on every side; 2) method of raising plasmid replication number, promptly replication origin is changed into the method for pUC by pBR.In addition, the dna direct of sequence number 1 aminoacid sequence in promoter region and the code sequence tabulation is linked up, to make up expression vector of the present invention (pKOT 245).This carrier is preserved in Ministry of International Trade and Industry April 14 nineteen ninety-five, (the Ibaraki county builds paddy field, ripple prefecture portion raised path between farm fields east to human technical institute (NIBH) of industrial technology institute, national life science, fourth order 1-3 (Japan), registration number is FERM P-14895, and on April 10th, 1996 was transferred to international preservation (FERM BP-5499) according to budapest treaty.

The present invention relates to prepare the method for monomeric protein, its step is to make up a plasmid, this plasmid contains the DNA of sequence number 1 aminoacid sequence in the tabulation of energy code sequence, 5 ' end of DNA has the codon of coding methionine(Met), the plasmid that makes up is imported to intestinal bacteria transform, cultivate intestinal bacteria, obtain inclusion body, this is dissolved, can obtain monomeric protein behind the purifying; The invention still further relates to and use this monomeric protein, the preparation method of sequence number 1 proteinic protein dimer in renaturation, purifying formation sequence table, be that colibacillary inclusion body obtains single Sulfonated MP52 monomer through SP-Sepharose post and Sephacryl S-200 post after dissolving, then through the RESOURCE of reversed-phase HPLC, the PRC post obtains protein purification dimer fraction.By analyzing this proteinic N-terminal aminoacid sequence, amino acid is formed and electrophoresis is understood its physicochemical property.

The invention still further relates to the colibacillary method of cultivating, the colibacillary culture condition after expression vector of the present invention inserts is that culture-liquid temp is 28 ℃-34 ℃, and pH6-8, dissolved oxygen concn are 20-50%.

The biologic activity of protein dimer of the present invention is definite like this, and the analysis of soft X line radiograph, histologic analysis and time dependent analysis are carried out in the formation of dystopy cartilage/bone.In addition, according to effect, judge to joint cartilage regenerated effect and to the damaged curative effect of fracture/bone whether protein of the present invention is effective to the reconstruction of cartilage/bone to intermembranous ossification.

Can use systemic administration protein dimer of the present invention by intravenously, intramuscular and intraperitoneal, when intravenously is used except that using traditional intravenous injection, available other the method for intravenous infusion.

As the preparation of injection, for example available injection powder preparation.Can use this moment such as one or more water soluble excipient such as N.F,USP MANNITOL, sucrose, lactose, maltose, glucose, fructose etc., be divided in bottle or the ampoule after the dissolving in water, the lyophilize sealing is preserved then.

During topical application, protein of the present invention can be covered cartilage/bone or the dental surface handled through collagen cream, Fibrin Glue or other adhesive agent.Nature bone can be used when bone is transplanted, also traditional artificial bone can be used.So-called artificial bone refers to the bone made with crude substance such as metal, pottery, glass or artificial inorganic substance.Preferred artificial inorganic substance are hydroxyapatites, the inside metallic substance of artificial bone for example, outside hydroxylapatite.Also available protein promoted bone to rebuild after carcinous osseous tissue removed, and also can be used for cartilage transplantation in addition.

The dosage of using will depend on the various factors that influences the effect of this protein, for example to consider the formed weight of bone/cartilage regeneration, the position of bone/cartilage injury and the state of an illness, the severity of patient's age, sex, infection, administration time and other clinical factor are determined its application dosage by the clinicist.In addition, change its consumption with this protein application carrier type when making up again.Generally, when using carrier-containing composition, every part of desirable bone/pairing dosage range of cartilage weight in wet base is 10-10 ⁶Ng, when part and systemic injection were used, everyone preferred dosage was 0.1-10 ⁴Mg, frequency is for once in a week to every day 1 time.

Expectation and known somatomedin, as the insulin like growth factor-1 (IGF-I) that is used for bone/regenerating bone or cartilage is used together and can be produced synergy.

So far report does not prepare method of protein of the present invention with technical scale, purified form, because protein of the present invention has the effect that forms cartilage/bone, so can be used as the medicament of cartilage, osteopathia.Preparation method of the present invention in addition can be used for preparing the bone forming factor of above-mentioned TGF-β gene superfamily, can only prepare with mammal cell line so far.

The accompanying drawing summary

Fig. 1 is the plasmid figure of protein expression carrier of the present invention (pKOT245) among the embodiment 1 (2).

Fig. 2 is the soft X-ray film of inducing the bone/cartilaginous calcification tissue of formation among the embodiment 4 (1) in the mouse leg muscle.

Fig. 3 is the photo that bone/cartilaginous calcification of forming in the mouse leg muscles among the embodiment 4 (1) organizes the painted microscopically of non-decalcification biopsy tissues to observe.

Fig. 4 is the photo of the microscopically of embodiment 4 (2) tissue stainings, and cartilage/bone forms over time in its expression mouse leg muscle.

Fig. 5 is the photo of rat parietal bone decalcification biopsy tissues dyeing back microscopically among the embodiment 4 (3).

Fig. 6 is the microphotograph that rabbit contains the femoral head decalcification tissue slice tissue staining of joint cartilage among the embodiment 4 (4).

Fig. 7 is the soft X-ray film that femur forms the damaged rat huckle of bone among the embodiment 4 (5).

Optimum implementation of the present invention

Giving an example below specifies effect of the present invention, but these embodiment limit the invention.The separation of preparation (1) the anomaly MP52 maturation zone of embodiment 1 carrier

Make template DNA with the plasmid vector (pSK52s) that includes cDNA described in the WO93/16099, with polymerase chain reaction (PCR) the increase maturation zone of people MP52 cDNA.

According to the method that strengthens goal gene throughput { report such as M.Nobuhara (agricultural biochemistry, 52 (6), 1331-1338, (1988) }, replace the part DNA of adult form MP52 gene, to improve the content of AT around the initiator codon ATG.

Replacement is carried out through the PCR method, adopts the PCR primer of sequence number 2 upstreams.The dna sequence dna of the PCR primer of using is, sequence number 2 is a upstream primer, and sequence number 3 is a downstream primer.

PCR carries out like this, adds each 50 picomole of template DNA (10ng), upstream and downstream PCR primer, dNTP (0.2mmol) and MgCl in the same test tube ₂(1.5mmol), add together with Taq archaeal dna polymerase (5U).

PCR carries out 30 circulations, and sex change (94 ℃, 1 minute), primer annealing (55 ℃, 1 minute) and primer extension (72 ℃, 2 minutes) (following PCR all carries out) are all passed through in each circulation under this condition.

Gained PCR reaction product is separated through 1.5% low melting point agar (FMC) electrophoresis, isolates the DNA (this is fragment 1) that equates about 360bp with the amino acid of sequence number 1.(2) structure of protein colon bacillus expression vector of the present invention

In order to increase the copies of plasmid, replication origin is changed into pUC system by pBR system.Coli expression carrier pKK223-3 (available from Pharmacia Biotech) with having bought in restriction enzyme SspI and the EcoRI digestion market is separated to the tac promoter region, after Mung Kidney bean nuclease is handled, uses T ₄Dna ligase (precious wine is made company, catalog number (Cat.No.) 2011A) is connected to the initiator codon side of fragment 1, with restriction enzyme SalI and SspI digestion pKK223-3, is separated to rrnBT ₁T ₂Stop the zone, be connected to the terminator codon side of the fragment 1 that has digested through SalI, be connected to the SmaI position of pUCl8 then, constitute production protein expression carrier of the present invention { pKOT245 (registration number be little worker grind post P-14895 number) } (Fig. 1).The DNA length of pKOT245 is 3.7kb.Analyze the base sequence of protein expression carrier of the present invention with Pharmacia ALP dna sequencing instrument.(3) transform

Rubidium chloride method (genetically engineered, p17, Elsevier (1978)) according to Kushner etc. transforms, and promptly according to aforesaid method pKOT245 is transformed into host e. coli W3110M, forms preparation protein colon bacillus of the present invention.Embodiment 2 cultivates (1) and cultivates

The SOC substratum (Bacto Tryptones 20g/L, microbial culture yeast extract 5g/L, NaCl 0.5g/L, the MgCl that are adjusting ₂6H ₂O2.03g/l glucose 3.6g/l) pre-culture expression protein colon bacillus of the present invention in is added to 5L to the 100ml bacterial suspension and produces (microbial culture Tryptones 5g/l, citric acid 4.3g/l, K in the substratum ₂HPO ₄4.675g/l, KH ₂PO ₄1.275g/l, NaCl 0.865g/l, FeSO ₄7H ₂O 100mg/l, CuSO ₄5H ₂O 1mg/l, MnSO ₄2H ₂O 0.5mg/l, CaCl ₂2H ₂O 2mg/Na ₂B ₄O ₇10H ₂O 0.225mg/l, (NH ₄) ₆Mo ₇O ₂₄4H ₂O 0.1mg/l, ZnSO ₄7H ₂O 2.25mg/l, CoCl ₂6H ₂O 6mg/l, MgSO ₄7H ₂O 2.2g/l, thiamines HCl 5.0mg/l, glucose 3g/l), in the culture tank of 10L, carry out aeration-agitation and cultivate, when arriving logarithmic growth early stage (OD550=5.0), add the isopropyl-of 1mM, cultivate OD550 is 150 always.In the culturing process, temperature is 32 ℃, and the ammonification adjust pH is 7.15, reduces in order to prevent the dissolved oxygen concn, and stirring velocity is increased to and makes the dissolved oxygen concn reach 50% of air saturation.In order to obtain the bacterium of high density, can dissolved oxygen concentration rise to index rapidly, add 50% glucose solution, reach 0.2%.(2) preparation of inclusion bodies of colibacillus

The medium centrifugal that obtains by aforesaid method, collect thalline, be suspended to then in the 25mM Tris-HCl damping fluid that contains the 10mM ethylenediamine tetraacetic acid (EDTA) (pH7.3), in cloud slurry device (Gaulin company), destroy bacterium, recentrifuge is collected the precipitation that contains inclusion body.Dissolving of embodiment 3 purifying (1) inclusion bodies of colibacillus

In 1%Triton X-100 after the washing 3 times, centrifugal 30 minutes of 4 ℃, 3000 * g, gained was deposited in 20mM Tris-HCl damping fluid: pH8.3 inclusion bodies of colibacillus, 8M urea, and 10mM DTT among the 1mM EDTA, dissolves through ultrasonic wave.(2) monomeric preparation

Lysate under 4 ℃, 20000 * g condition centrifugal 30 minutes is collected supernatant liquor.The gained supernatant liquor is passed through through 20mM Tris-HCl damping fluid, pH8.3,6M urea, the SP-Sepharose FF that 1mM EDTA balance is crossed (Parmacia company) with identical solution washing, carries out wash-out with the same solution that contains 0.5M salt.In elutriant, add Na ₂SO ₃And Na ₂S ₄O ₆Reach 111mM, 13mM up to separately final concentration, carried out sulfonated 15 hours at 4 ℃.With 20mM Tris-HCl damping fluid, pH8.3,6M urea, 0.2M NaCl, the Sephacryl S-200 HR (Pharmacia company) that 1mM EDTA balance is crossed carries out gel-filtration to sulfation solution, can obtain the single Sulfonated monomer of protein of the present invention.(3) folding again

After adding the 50mM Na-glycine buffer, 0.2M NaCl, 16mM CHAPS, 5mM EDTA, 2mMGSH (reduced glutathion), 1mM GSSG (Sleep-promoting factor B) of 9 times pH9.8 in the proteinic sulfonated monomer solution of the present invention, 4 ℃ of stirrings were regenerated 24 hours.(4) dimeric preparation

To fold solution again with pure water and carry out 2 times of dilutions, and add 6N hydrochloric acid and transfer pH 7.4 to carry out isoelectric precipitation.Centrifugal 20 minutes collecting precipitations of 3000 * g dissolve in 30% acetonitrile, 0.1%TFA then.With pure water gained solution is carried out 2 times of dilutions, go up application of sample at the RESOURCE PRC post (Pharmacia) of the reversed-phase HPLC of crossing through 0.05%TFA, 25% acetonitrile balance then, the gradient liquid that forms with 0.05%TFA, 25-45% acetonitrile carries out wash-out then.Measure the absorbancy of elutriant at the 280nm of extinction photometer wavelength place, can obtain the protein dimer fraction of purifying.This is carried out lyophilize with Speed Vac Concentrator (Serrant company).(5) analysis of physicochemical property (A) the N-terminal aminoacid sequence of mensuration protein purification of the present invention

Analyze the N-terminal aminoacid sequence of above-mentioned protein purification with 476A type Protein Sequencer (Applied Biosystems company), can confirm that sequence number 1 is from 30 amino acid whose sequences of N-terminal to the in the sequence table.(B) analysis of amino acid composition

Analyze the amino acid of above-mentioned protein purification with amino acidanalyser [PICO TAG system (Waters company)] and form, its result is as shown in table 1.Number shown in the table 1 refers to the total number of atnino acid of each monomeric protein.

Table 1 amino acid actual value desired value Asx 11.5 12Glx 10.9 11Ser 8.4 9Gly 4.3 4His 4.0 4Arg 7.7 7Thr 5.4 6Ala 7.3 7Pro 10.2 10Tyr 2.9 3Val 5.7 7Met 5.1 41/2Cys 2.6 7Ile 4.9 6Leu 10.0 10Phe 4.0 4Lys 5.9 6Trp-2 sequence lengths 119

-: do not detect

(C) electrophoretic analysis

Determine that through SDS-PAGE the molecular weight of above-mentioned protein purification is 28KDa under the non-reduced condition.

By the shown result of above-mentioned (A), (B), (C) as can be known, protein of the present invention is by 119 protein that amino-acid residue is formed that begin from single proline(Pro).The effect that mensuration (1) the dystopy cartilage/bone tissue of embodiment 4 biologic activity forms

The 500 μ g protein that embodiment 3 is obtained are dissolved in the 50 μ l 10mM hydrochloric acid, use same solvent cut, and making concentration is 1 μ g/10 μ l, 10 μ g/10 μ l, the solution of 100 μ g/10 μ l.Per 10 μ l and 150 μ l derive from the type i collagen solution (Gao Yan of pig tendon, 0.5%, pH3, I-AC) mixed, in and postlyophilization, the gained mixture imbed 8 the week age ICR male mice leg muscle in, win thigh after 21 days, peel off skin, detect the incidence of bone/cartilaginous calcification tissue according to soft X-ray film.The result is as shown in table 2.Consumption is that the part calcification can be found when above in 1 μ g/ position, dosage be 10 μ g/ positions when above all mouse all calcification can appear.

The incidence contrast of the proteinic consumption bone of table 2MP52/cartilaginous calcification tissue (only with I type glue type) 4/4100 μ g/ position 4/4,3/410 μ g/ position, 0/41 μ g/ position ^*Every group has 4 examples, represents incidence according to the result that the soft X-ray film of bone/cartilaginous calcification tissue is analyzed

In addition, Fig. 2 has shown the typical soft X-ray film of each consumption time institute inductive bone/cartilaginous calcification tissue.Fig. 2 shown the MP52 protein of different amounts imbedded result in the mouse leg muscle, and wherein the MP52 protein used of A is 1 μ g/ position, and B is 10 μ g/ positions, and C is 100 μ g/ positions.Can find out that from this result bone/cartilaginous calcification tissue is dose-dependently ground and increases.The thigh of these mouse is made non-decalcification section after fixing, carried out Von Kossa dyeing, Alcian blue dyeing and (phenodin Yihong) dyeing separately.

When being 10 μ g/ positions for the protein consumption, Fig. 3 imbeds the microphotograph of the back sample tissue staining of getting with type i collagen.A, B, C represent Von Kossa dyeing, Alcian blue dyeing and (phenodin Yihong) dyeing respectively among Fig. 3.

Arrow ct partly represents calcified tissue among Fig. 3 (A), and cc partly represents the chondrocyte of calcification.Arrow rc partly represents remaining cartilaginous tissue among Fig. 3 (B).Arrow ad partly represents adipocyte among Fig. 3 (C), and bm partly is a medullary cell, and lb partly is a lamellar bone, and ob partly is a scleroblast, and wb is a reticulated bone.Fig. 3 shows that using MP52 protein can generate scleroblast, and medullary cell, calcified cartilage cell also can form bone/cartilaginous calcification tissue.

The proteinic dimer of the provable the present invention of the result of embodiment 4 has the effect of inducing cartilage/bone to form.(2) phase analysis of ectopic ossification effect

3 μ g protein of gained from embodiment 3 are prepared by the Same Way described in the embodiment 4 (1), gained lyophilize thing is imbedded in the leg muscle of ICR mouse, 3, take out tissue after 7,10,14,21 and 28 days, formalin with 10% is fixed, and afterwards tissue slice is carried out hematoxylin eosin stain (HE) and Von Kossa dyeing.Fig. 4 represents the optical microscope photograph of stained.

The 3rd day (Fig. 4 A, HE) can see and occur undifferentiated mesenchymal cell (mc) between the collegen filament (co) imbedded and the muscle tissue on every side (m), and it includes bonded fibrocyte on the morphology.(Fig. 4 B HE) can see that to the 10th day (Fig. 4 C, HE) the not differentiation mesenchymal cell (mc) at this position is piled up, propagation, and these cell hypertrophyizations, is divided into precartilage sample tissue, (Fig. 4 D, HE on the 14th from the 7th day; Fig. 4 E, Von Kossa) can see the cartilaginous tissue (arrow cc) and the osseous tissue (arrow b) of calcification.(Fig. 4 F, HE on the 21st; Fig. 4 G, Von Kossa) can see medullary cell (arrow bm), but can't see the 14th day viewed calcified cartilage tissue at all, seem to be replaced by osseous tissue (arrow b).The 28th day (Fig. 4 H, HE) can see medullary cell (bm) widely, and formed osseous tissue (b) seems to be in absorption process.

As confirming with conventional BMPs, can prove that thus rMP52 can induce cartilaginous tissue in dystopy, can cause that then cartilage forms.(3) to the influence of intermembranous ossification

The protein that in containing the physiology phosphate buffered saline buffer (pH3.4) of 0.01% human serum albumin, obtains among the dissolving embodiment 3, be made into the solution of 0.01 μ g/20 μ l, 0.1 μ g/20 μ l and 1 μ g/20 μ l, every kind of solution is got 20 μ l, be expelled to ス プ ラ ダ De-レ-be in the periosteum of rat left and right sides parietal bone one side with microsyringe, from the 1st day start injection in rat birth back, once a day, continuously same position injection 12 days.The solvent of injection equivalent in offside parietal bone periosteum.Give the interior injection solvent of both sides parietal bone periosteum of control rats.Use the extraction left and right sides, back parietal bone for the last time, fixing, sample is made in site of administration HE dyeing after decalcification, and the thickness of left and right sides parietal bone site of administration on the measuring microscope photo calculates thickness and the ratio of using solvent position thickness that same individuality is used protein of the present invention position.The result is as shown in table 3.Fig. 5 is the optical microscope photograph of tissue slice when injecting protein 0.1 μ g/20 μ l of the present invention continuously, the embodiment that the optical microscope photograph (Fig. 5 A) when (Fig. 5 B) uses solvent with offside compares.Use protein of the present invention and can induce the activation and the propagation of periosteum cell (P), can find many activatory scleroblasts at the intersection of parietal bone and periosteum (P) simultaneously, and the thickness of susceptible of proof site of administration parietal bone (b) thickens with being dose-dependently.Results suggest is when local a small amount of injection, and protein of the present invention can promote periosteal ossification, helps osteoporosis, fracture, alveolus, treatment that root of the tooth is damaged.

The parietal bone thickness of the proteinic consumption site of administration of table 3 the present invention, (μ m) thickness ratio, (μ g/ position/day) uses solvent, (A) use protein of the present invention, (B), (B/A) 0, (solvent) 128 ± 7 141 ± 20 1.10 ± 0.160.01 134 ± 9 167 ± 30 1.27 ± 0.330.1 119 ± 19 190 ± 29 1.60 ± 0.10 ^*1 132 ± 9 225 ± 25 1.70 ± 0.14 ^*

The means standard deviation of parietal bone thickness and ratio 4 examples thereof

^*P＜0.05, ^*P＜0.01 is used group of solvents with left and right sides parietal bone and is compared (4) to joint cartilage regenerated effect

The right side knee skin of 6 12 week male rabbits in age (New Zealand white rabbit) and joint capsule are cut, expose the kneecap ditch and avoid damaging tendon simultaneously,, cause the joint cartilage/bone injury of perforation with the medullary space that dental burr is bored a diameter 5mm.The method preparation of describing by embodiment 4 (1) contains or does not contain the proteinic type i collagen lyophilize of the 10 μ g thing that embodiment 3 obtains, and is administered to then and causes damaged position, on average uses 3 examples, sews up joint capsule and skin.The femoral head of extraction thigh is fixing after 3 weeks, and tissue slice is made in decalcification then, likes alizarin indigo plant dyeing.Fig. 6 is the typical optical microscope photograph of 1 example.(figure A and figure B) only sees fibrous tissue (f) in defect when only using type i collagen lyophilize thing, can see in defect and follows the extracellular matrix of liking alizarin basket stained positive to have chondrocyte (ch) to form and used behind the type i collagen albumen that contains the embodiment of the invention 3 protein 10 μ g (figure C and figure D).And its formed tissue is similar to the observed cellularity of natural joint cartilaginous tissue, is resting cell layer, proliferative cell layer, mastocyte layer from outside to inside by defect.These results can see all that in every rabbit this shows protein of the present invention to regenerating bone or cartilage, and especially the joint cartilage sex change organized renewing that arthritis deformans or osteoarthritis are caused is that healthy tissues is effective.(5) curative effect damaged to fracture/bone

Doing this experiment with 30 ス プ ラ ダ De-レ-be male rat (about 15 ages in week) cuts the skin histology of huckle, from muscle tissue on every side, femur is come out, damaged at the tubular bone that the key central authorities of femur make 5mm with dental burr, the screw of manufacturing with stainless steel is fixed on residual femur two ends on the plate that polyethylene makes then.Manufacture the lyophilize article of type i collagen, containing embodiment 3 proteinic amounts is 0,1,10 or 100 μ g, imbeds the bone defect then, the skin suture tissue.Carry out soft X roentgenogram x after just having imbedded the back and having imbedded for 12 weeks, the result as shown in Figure 7.Fig. 7 A is the photo when just having caused bone damaged.As scheme shown in the B-E, to imbed type i collagen (Fig. 7 B) separately and imbed the type i collagen (Fig. 7 C) after 12 weeks that contains protein 1 μ g of the present invention, the perimyelis (arrow cs) of only seeing some edges at the two ends of defect forms and does not form knitting.But (figure D and figure E) can see the bone defect and all form poroma (arrow cs) after imbedding the type i collagen that contains protein 10 μ g or 100 μ g, can see knitting on the X-ray film.Imbed 12 all backs extraction femurs, remove the plate that polyoxyethylene glycol is manufactured, according to double X line absorption surveying (Aloka, DCS-600) under the wide scanning mode of 1mm, along with contain damaged the vertical direction continuous sweep of femur long axis direction of bone 15mm, measure the bone mineral content at the damaged central part 3mm of bone place, use resin bone fixation two ends simultaneously, bone strength survey meter (Malto packs into, MZ-5000), with 180 °/minute speed rotation resin, measure the necessary maximum rotation dynamics of femur (table 4) of destroying.The result shows, increase the bone mineral content at this position and can improve the bone strength (swing) at this position but protein of the present invention is imbedded dose-dependently ground, femur defect position, this can show that protein of the present invention is effective to the damaged reconstruction of the healing of fracture and bone equally.

The content of mineral substances (mg) of the maximum endurance example number consumption of the proteinic rat femur bone of table 4 the present invention defect (μ g/ position) is (kgfcm) only with collagen 120.2 ± 24.5 2.92 ± 0.09 61 176.9 ± 36.4 6.24 ± 1 00 810 277.4 ± 63.9 9.35 ± 3.14 8,100 374.8 ± 67.1 ^*40.34 ± 7.64 ^*8 represent with the mean value standard error ^*P＜0.05 with only compare the possibility of utilizing on the industry with the collagen group

Have the activity that forms cartilage/bone by containing the protein that the proteinic dimer of aminoacid sequence constitutes in the ordered list sequence number 1, help as cartilage/bone treatment of diseases medicament.In addition, change protein expression carrier of the present invention, the intestinal bacteria that transform with its utilize this intestinal bacteria can technical scale to prepare the protein of purified form by engineered method.

Sequence table sequence number: 1 sequence length: 119 sequence types: amino acid topology: the kind of linear order: peptide fragment type: N-terminal fragment source:

Biological name: people (homo sapiens)

Tissue types: human fetal sequence signature:

The location:

Other situation: 383-501 bit sequence sequences of NP52 aminoacid sequence: CCA CTG GCC ACT CGC CAG GGC AAG CGA CCC AGC AAG AAC CTT AAG GCT 48Pro Leu Ala Thr Arg Gln Gly Lys Arg Pro Ser Lys Asn Leu Lys Ala

5 10 15CGC?TGC?AGT?CGG?AAG?GCA?CTG?CAT?GTC?AAC?TTC?AAG?GAC?ATG?GGC?TGG 96Arg?Cys?Ser?Arg?Lys?Ala?Leu?His?Val?Asn?Phe?Lys?Asp?Met?Gly?Trp

20 25 30GAC?GAC?TGG?ATC?ATC?GCA?CCC?CTT?GAG?TAC?GAG?GCT?TTC?CAC?TGC?GAG 144Asp?Asp?Trp?Ile?Ile?Ala?Pro?Leu?Glu?Tyr?Glu?Ala?Phe?His?Cys?Glu

35 40 45GGG?CTG?TGC?GAG?TTC?CCA?TTG?CGC?TCC?CAC?CTG?GAG?CCC?ACG?AAT?CAT 192Gly?Leu?Cys?Glu?Phe?Pro?Leu?Arg?Ser?His?Leu?Glu?Pro?Thr?Asn?His

50 55 60GCA?GTC?ATC?CAG?ACC?CTG?ATG?AAC?TCC?ATG?GAC?CCC?GAG?TCC?ACA?CCA 240Ala?Val?Ile?Gln?Thr?Leu?Met?Ash?Ser?Met?Asp?Pro?Glu?Ser?Thr?Pro65 70 75 80CCC?ACC?TGC?TGT?GTG?CCC?ACG?CGA?CTG?AGT?CCC?ATC?AGC?ATC?CTC?TTC 288Pro?Thr?Cys?Cys?Val?Pro?Thr?Arg?Leu?Ser?Pro?Ile?Ser?Ile?Leu?Phe

85 90 95ATT?GAC?TCT?GCC?AAC?AAC?GTG?GTG?TAT?AAG?CAG?TAT?GAG?GAC?ATG?GTC 336Ile?Asp?Ser?Ala?Asn?Asn?Val?Val?Tyr?Lys?Gln?Tyr?Glu?Asp?Met?Val

100 105 110GTG?GAG?TCG?TGT?GGC?TGC?AGG 357Val?Glu?Ser?Cys?Gly?Cys?Arg

115 sequence numbers: 2 sequence lengths: 27 sequence types: nucleic acid chain: strand topology: the kind of linear order: other nucleic acid source: do not have

Biological name: do not have

Strain name: no sequence feature: the upstream PCR primer sequence of MP52 adult form:

ATAATGCCAC TAGCAACTCG TCAGGGC 27 sequence numbers: 3 sequence lengths: 26 sequence types: nucleic acid chain: strand topology: the kind of linear order: other nucleic acid source: do not have

Biological name: do not have

Strain name: no sequence feature: the downstream PCR primer sequence of MP52 adult form:

CGTCGACTAC CTGCAGCCAC ACGACT 26

Claims (15)

1. protein with aminoacid sequence of sequence number 1 in the sequence table.

2. protein that constitutes by the protein dimer of claim 1.

One kind with the described protein of claim 2 as the treatment cartilage of effective constituent and the medicament of osteopathia.

4. the described medicament that is used for the treatment of cartilage and osteopathia of claim 3, wherein cartilage and osteopathia phalanges matter osteoporosis.

5. the described medicament that is used for the treatment of cartilage and osteopathia of claim 3, wherein cartilage and osteopathia refer to arthritis deformans or osteoarthritis.

6. the described medicament that is used for the treatment of cartilage and osteopathia of claim 3, wherein cartilage and osteopathia phalangeal fracture and bone are damaged.

7. the described medicament that is used for the treatment of cartilage and osteopathia of claim 3, wherein cartilage, osteopathia refer to that root of the tooth and alveolus are damaged.

8. one kind prepares method of protein in the claim 1, comprises the intestinal bacteria of cultivating with containing the plasmid conversion that can express protein DNA sequence in the claim 1.

9. the preparation method of claim 8, it is characterized in that its constructed plasmid contain can the code sequence tabulation in the DNA of aminoacid sequence in the sequence number 1, and 5 ' end of this DNA has the codon of coding methionine(Met).

10. proteinic preparation method in the claim 2 is characterized in that making up a plasmid, and this plasmid contains the DNA of sequence number 1 aminoacid sequence in the tabulation of energy code sequence, and 5 ' end of DNA has the codon of coding methionine(Met); Use this plasmid transformation escherichia coli, cultivate intestinal bacteria; The inclusion body that dissolving obtains in cultivating is purified from lysate and is obtained monomeric protein, and monomeric protein is folding to obtain protein dimer, and this is purified.

11. the methods of treatment of cartilage and osteopathia comprises the protein of using claim 2.

12. the methods of treatment of claim 11, wherein cartilage and osteopathia phalanges matter osteoporosis.

13. the methods of treatment of claim 11, wherein cartilage and osteopathia refer to arthritis deformans or osteoarthritis.

14. the methods of treatment of claim 11, wherein cartilage and osteopathia phalangeal fracture and bone are damaged.

15. the methods of treatment of claim 11, wherein cartilage and osteopathia refer to that root of the tooth, alveolus are damaged.

Images