CN100406059C - Purposes of parathyroid hormone - Google Patents

Purposes of parathyroid hormone Download PDF

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CN100406059C
CN100406059C CNB2004100224314A CN200410022431A CN100406059C CN 100406059 C CN100406059 C CN 100406059C CN B2004100224314 A CNB2004100224314 A CN B2004100224314A CN 200410022431 A CN200410022431 A CN 200410022431A CN 100406059 C CN100406059 C CN 100406059C
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parathyroid hormone
pth
dentin
cell
people
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CN1689642A (en
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陈新梅
肖明振
倪龙兴
张亚庆
谭红
孙瑜
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Abstract

The present invention provides a new application of parathyroid hormone, particularly an application of parathyroid hormone for preparing a medicament for treating dentin and dentinal matrix. The medicament comprises an agent prepared from an effective amount of parathyroid hormone. The problem of synthesizing parathyroid hormone in vivo is solved, and the parathyroid hormone level is close to the physiological level. The medicament keeps PTH in a normal value level for a long time, avoids the side effects caused by a calcium agent, dihydrotachysterol and the like for clinical application by the action of the parathyroid hormone, and has the advantages of simple preparation, low price and easy popularization.

Description

The new purposes of parathyroid hormone
Technical field
The present invention relates to the new purposes of parathyroid hormone (PTH), specifically, is the purposes of parathyroid hormone in the medicine of preparation treatment dentin and dentinal matrix.
Background technology
Parathyroid hormone (parathyroid hormone, PTH) make it to maintain a kind of important substance of normal level as regulating blood calcium, be to form by 84 amino acid residue condensations, the formation that promotes bone has been reported in the effect of its amino section 31~38 amino acid residues at present, and improve biomechanics of bone intensity, treat osteoporotic purposes.The patent No. is 94192745.8 to disclose " parathyroid hormone analogs and parathyroid hormone-related peptide: the purposes of synthetic and treatment osteoporosis ", but the dentin of one of whole body mineralized tissue form and mineralization process in have or not effect and what kind of effect arranged, the present domestic report that still do not have.Relevant PTH there is no report both at home and abroad at present to the influence of the dental papilla mesenchymal cells of one of odontoblast's precursor; Its mechanism of action is the growth by adjusting plasma calcium phosphorus concentration remote-effects tooth, or directly regulating dentinal matrix forms and mineralising, awaits determining, and reports as yet at present.
Parathyroid hormone (parathyroid hormone, PTH) also be to regulate a kind of important substance that blood calcium makes it to maintain normal level, studies show that: people's dental papilla mesenchymal cells (dentalpapilla mesenchymal, DPMC) reaction to parathyroid hormone has some osteoblastic characteristic, under the PTH effect, the DPMC under the condition of in vitro culture is to the direction differentiation with skeletonization characteristic cell [1]But its mechanism of action does not still have relevant report.PTH is an important hormonal substance during the mineralized tissue metabolism is regulated, and in vivo alcium and phosphor metabolization is had important regulatory role.Discovery when the research parathyroid hormone influence the people DPMC biological characteristics of In vitro culture [1]: PTH does not influence people's dental papilla mesenchymal cells propagation of In vitro culture, and only promotes the differentiation of cell and function to enliven.PTH is by cyclic adenosine monophosphate (cAMP) mediation in the cell.Make the active reduction of alkali phosphatase (ALP) in people's dental papilla mesenchymal cells, extracellular ALP is active to be increased and make, and prompting PTH may be the important medium of odontoblast's differentiation and mineralising.
Bone morphogenetic protein(BMP) (BMP) is to form the extremely close cytokine of relation with bone and hard tooth tissue.Existing scholar [2~5]Adopt immunohistochemistry, situ hybridization technology, studied BMP, BMP2A, BMP3cDNA respectively in dental gram and distribution in people pulp tissue and expression, thought that they play an important role in the growth course of dental gram and dental pulp self repair process.Bone morphogenetic protein(BMP) (BMP) is a kind of bone Induced substance efficiently, is the initially signal molecule of mesenchymal cell to the differentiation of osteocyte system.In bone formation and growth course, BMP has important effect for chemotactic, mitosis and the differentiation of cell.In embryo development procedure, when the BMP molecule when some special areas is expressed, can induce the gathering of its peripheral cell, and then to bone and cartilage differentiation.BMP2 is member the closest with bone formation in the BMP family.Nakashima [14]Can induce Dentinal formation Deng report: BMP2 and collagen stroma after compound.Lyons [3]With high beautiful good [4]Deng utilization in situ hybridization technology for detection BMP2A expression of gene and distribution in the dental gram, found that in enamel organ epithelial cell, dental papilla cells, Dental Follicle Cells and the dental gram osteoblast on every side all has a large amount of positive signal to occur, and the result is consistent with immunohistochemical study.Think activation and the expression that in the dental germ during development process, is accompanied by the BMP gene.BMP3 is the non-collagen sugar albumen of a kind of hydrophobicity, and molecular weight 30~40KD is the dimeric structure of disulfide-bonded.BMP3 is with after carrier combines, and can activate osteoblastic expression and have induced activity by inducing [15]Simultaneously, BMP3 takes place in the bone form [16]With people's embryo tissue development [17]In also play an important role.There is the BMP3 expression of gene at the glaze joint place (Enamal knot) of discovery rat molar dental grams such as Thomas [18]Tabas [19]Deng utilizing the somatic hybridization strain, BMP1,2,3, the position of 4 genes on chromosome have been determined with cDNA probe hybridization technology, found that BMP3 is positioned at No. 4 chromosome P18.4-q21 zone of people, overlapping with the gene loci of two type dentin dysplasia (dentinogenesis imperfecta typeII), prompting BMP3 gene may be significant in dentin form generating process.BMP3mRNA mainly is distributed in the tissue and the cell in neuroderm source [16], and the binding site of BMP3 is rich in the tissue in mesoderm source, prompting BMP3 has significance for epithelium-mesochymal reciprocal action.BMP3 induces effect in the differentiation in odontoblast, does not still have relevant report at present.Wang Zhongdong [5]Discover that sophisticated functional odontoblast is under dental caries source property inflammatory stimulus to a certain degree, its BMP3 gene activation is also expressed, participate in the atomization of inducing of pulp cells, self repair process to dental pulp may be significant, thinks that BMP3 gene expression is strong and weak relevant with the differentiation degree and the residing functional status of cell.There are some researches show [6~12]It is significant equally during the dentin of BMP in dental germ during development and dental pulp self repair process forms.Nakashima [8]BMP is placed the perforation of pulp chamber point place of Canis familiaris L. tooth, observe the formation of reparative dentin, think that BMP can promote dental pulp mesenchymal cell propagation, induce osteoid dentin to form, and the differentiation that can induce odontoblast the latter.High jade is good etc. [11]Find that BMP can promote people's pulp cells of subculture In vitro culture 3H-TdR mixes, and improves propagation phase ALPase activity, thinks that BMP has regulating action to the differentiation of inducing of pulp cells.The ameloblast of organic centre occurs early than odontoblast in the tooth development, BMP content in the ameloblast is always abundant than odontoblast, and the existence of BMP before occurring, the odontoblast of its corresponding site just arranged in the endochylema, the prompting ameloblast is by synthetic and secretion BMP, induce the differentiation of odontoblast, and then form dentin [13]At present, to Dentinal effect, only limit to the research of rationale at PTH, no relevant report is used for clinical with medicament forms.
At present, dentin form disorder disease mainly be imperfect hereditary dentinogenesis (dentinogenesis imperfecta, DGI), it is a kind of autosomal dominant inherited disease, sickness rate is about 1/8000, penetrance is about 100%.Be divided into three types clinically; I type (DGI-I), the patient is except that dentinogenesis imperfecta, and also with the undergrown symptom of skeletonization, its cause of disease is type i collagen gene mutation widely.II type (GI-II), have another name called hereditary opalescent dentin, its show as the tooth color and luster from translucent to light blue to dark-brown and opalescence sample color occurs, tooth often has heavy wear, the minority case can be with enamel hypoplasia, but without dysosteogenesis, the visible root of the tooth of X-ray film is short, pulp chamber and root pipe complete atresia.Aplin etc. are in the scope of 2cm with its gene mapping hereditism's distance between 4q21 zone GATA6211 and D4S1563, scholars such as Grosby are defined as candidate gene with the DSPP gene in this scope, scholars find that by order-checking there is a C → T sudden change in No. 3 exon 3658 sites of DSPP gene, formed the synthetic terminator of albumen, this nonsense mutation makes reading frame in advance, cause dentin sialoprotein and dentin squama protein delation, thereby caused HAP nucleation and mineralising incomplete, finally form pathologic DGI-II.III type (DGI-III) claims brandy type hypoplasia of dentin again, for isolating 3 special hereditary opalescent dentines of isolating among the national group that betide the Maryland State, it is characterized by dentin as thin as a wafer, and pulp chamber and root pipe obviously increase.In the tooth development process,, also can cause hypoplasia of dentin if the alcium and phosphor metabolization obstacle that a variety of causes causes takes place.The medicine of the disease of treatment dentin and dentinal matrix has calcium and vitamin D, calcitonin, estrogen replacement therapy and diphosphate etc. at present, its defective comprises: use the toxic and side effects of calcium preparation and vitamin D treatment that the toxic and side effects of (1) chemical compound itself is arranged: the local excitation symptom has gastrointestinal symptoms such as nauseating, vomiting, gastrointestinal upset, loss of appetite, constipation, and the pain of injection site, necrosis etc.; General Symptoms comprises: the calcium preparation that comes into operation in a large number can disturb absorbing of biological elements such as phosphorus, zinc, ferrum; Injecting too fast arrhythmia that causes so that chamber quivers etc.(2) toxic and side effects of additive or field trash: the toxic and side effects of additive: adding citric acid, acetic acid etc. in the calcium preparation influences mouthfeel; Add artificial coloring, essence or glucide etc., infant is had a negative impact, the also toxic effect of the nerve of undeveloped mature; Add sugar, can influence appetite and nutritive equilibrium.The toxic and side effects of field trash, biology or mineral sources preparation are often polluted or are mixed harmful elements such as lead, hydrargyrum, cadmium, although they in calcium preparation content seldom, calcium preparation mostly is month after month or takes throughout the year, many clothes have the possibility that causes retention toxicosis.Estrogenic use has higher requirement at dosage with on the course of treatment, dosage must be to be increased gradually by low amount, until optimal dose.Have report to think any and can increase estrogen content in the blood, the treatment that increases the estrogen metabolism level all can increase breast carcinoma, and the danger of carcinoma of endometrium and venous thrombosis adds simultaneously with low dose of progestogen and can reduce side effect.The calcitonin past attempts is used for subcutaneous injection and is used for nose now spraying into, and this usage is rarely had report by most of people accept side effect.The diphosphonates side effects of pharmaceutical drugs are that the gastrointestinal untoward reaction may appear in medication person, as diarrhoea and dyspepsia etc.
Summary of the invention
Technical scheme to be solved by this invention provides the new purposes of parathyroid hormone, specifically, is the purposes of parathyroid hormone in the medicine of the disease of preparation treatment dentin and dentinal matrix.
The invention provides the purposes of parathyroid hormone in the disease of preparation treatment dentin and dentinal matrix.
Further, be the purposes of parathyroid hormone in the medicine of preparation treatment hypoplasia of dentin.
The present invention also provides a kind of pharmaceutical composition, and it comprises the preparation that the parathyroid hormone of effective dose is made.
Parathyroid hormone 0.5mg~4mg is contained in wherein every preparation unit.The scope that this pharmaceutical composition acts on the intravital blood drug level of people is: 8~42nmol/ml, to act on the intravital blood drug level of people be 33.3nmol/ml to this pharmaceutical composition further.
The present invention also provides the purposes of this pharmaceutical composition in the disease of preparation treatment dentin and dentinal matrix.
Further, the present invention also provides the purposes of this pharmaceutical composition in the medicine of the disease of treatment dentin for preparing the subcutaneous injection administration and dentinal matrix.Wherein said medicine composition injection or injectable powder.
The present invention also provides the purposes of this pharmaceutical composition in the medicine of the disease of treatment dentin for preparing oral administration and dentinal matrix.Further, described preparation is an oral formulations.
The present invention also provides this pharmaceutical composition to suck purposes in the medicine of disease of the treatment dentin of administration and dentinal matrix in preparation.Further, described buccal lozenge is buccal tablet, oral cavity adhesion tablet, membrane, spray.The present invention also provides the purposes of parathyroid hormone in the medicine of preparation treatment hypoplasia of dentin.
The present invention adopts modern cell culture technology, utilize the experimental model of precursor-dental papilla mesenchymal cells of the people odontoblast of external foundation, cDNA probe with digoxigenin labeled, people's dental papilla mesenchymal cells BMP2mRNA and BMP3mRNA expression to In vitro culture, and cell is behind PTH effect 5d, the situation of change of cellular expression is observed, and inquires into influence and the approach of PTH to people's dental papilla mesenchymal cells.A little less than found that people's dental papilla mesenchymal cells BMP2mRNA of In vitro culture and BMP3mRNA positive hybridization signal are; Cell is behind PTH effect 5d, and the expression of BMP2mRNA does not have significant change, and in cytoplasm, the BMP3mRNA positive hybridization signal occurs.Illustrate that people's dental papilla mesenchymal cells of In vitro culture has the potential of synthetic BMP2 and BMP3, PTH significantly improves the ability of the synthetic BMP3 of cell.When the present invention compares by the mineralization ability of people DPMC under the PTH effect, finder's blood drug level is that the PTH of 33.3nmol/ml significantly increases the mineralising tuberosity of cell and the number of matrix vesicle, pass through In vitro culture, illustrate that PTH can significantly improve the mineralization degree of people DPMC, promote cell differentiation.
Under the effect of PTH, the BMP3 gene is activated, expresses, participate in inducing of dental papilla mesenchymal cells and break up by autocrine and paracrine action, promote the formation of dentin and dentin sample substrate, reach the purpose of treatment hypoplasia of dentin, adopt purposes of the present invention, solved the problem of synthetic PTH in the body, and PTH is near physiological level, and it is longer at the normal value leveled time to keep PTH, by the PTH effect, avoided the side reaction of clinical practice calcium preparation, dihydro-tachysterol etc., and simple for production, expense is cheap, is easy to promote.
Since PTH has ossification, broken bone effect is arranged again, as hormone medicine, different medicine prescription methods can produce different consequences, and the present invention adopts to be interrupted and gives administration, intermittent subcutaneous injection: carry out subcutaneous injection 8~9 of early mornings every day one time, inferior on every Saturdays, repeated (physiological rhythm of parathyroid hormone reaches the highest in early morning every day, later on slowly decline) at interval in one day again, by the use of this medication, can effectively improve bone mass.
Obviously, according to foregoing of the present invention,,, can also make modification, replacement or the change of other various ways not breaking away under the above-mentioned basic fundamental thought of the present invention prerequisite according to the ordinary skill knowledge and the customary means of this area.
The specific embodiment of form is described in further detail foregoing of the present invention again by the following examples.But this should be interpreted as that the scope of the above-mentioned theme of the present invention only limits to following example.All technology that realizes based on foregoing of the present invention all belong to scope of the present invention.
The specific embodiment
Embodiment 1
The parathyroid hormone of effective dose (1-2mg) is made aqueous injection with adjuvant (or additives).
Embodiment 2
The parathyroid hormone of effective dose (1-2mg) is made solution with adjuvant (or additives), drying, and injectable powder is made in sterilization.
Embodiment 3 pharmaceutical composition buccal tablet preparations of the present invention
PTH is fully mixed with blank granule, direct compression under normal temperature condition, every contains PTH is 2~4mg.
Embodiment 4 pharmaceutical composition adhesion tablets of the present invention
Divide three layers with adjuvant, PTH: lower floor makes substrate with HPC/CP, and the middle level is PTH, and the upper strata is a lactose, direct compression, and every contains PTH0.5~1mg.
Embodiment 5 medicine membrane preparations of the present invention
Make substrate with polyethylene, with molding machine direct compression film former, every contains PTH0.5~1mg.
Embodiment 6 medicament spraying agents of the present invention
Spray adjuvant with routine mixes with PTH, and be prepared into the PTH spray, specification: 2~4mg/ presses.
Below by concrete experiment in vitro, animal pharmacodynamics evidence beneficial effect of the present invention.
Experimental example 1 pharmaceutical composition parathyroid hormone of the present invention is expressed people's dental papilla mesenchymal cells bone morphogenetic protein(BMP)
1, material
Parathyroid hormone (Bachem Japan)
Plasmid pSP65-BMP2 and pGEX2T-BMP3 (the Dr Wozney of U.S. gene studies institute is so kind as to give)
2, method
2.1 grouping
Matched group: DMEM (Dulbecco ' s Modified Eagle ' sMedium:Dulbecco the improves cell culture fluid) culture fluid that contains 2%FCS (hyclone).
Experimental group: PTH is diluted with the DMEM culture fluid that contains 2%FCS, and concentration is 33.3nmol/L.
2.2 cell culture
Get the dental papilla tissue of legal 7 monthly ages of induction of labor with water bag man tire.Carry out primitive cell culture with tissue block method, SABC is carried out origin of cell and is identified.Get well-grown the 4th generation people dental papilla mesenchymal cells, after 0.25% trypsinization, with 2 * 10 3Cell concentration is inoculated into and is covered with sterility cover slide (6mm 2) 24 orifice plates in, containing respectively, hatch 24h under the standard environment with containing in the DMEM culture fluid of 10%FCS.Discard cell culture supernatant, change matched group and experimental group culture fluid respectively into, continue to cultivate 5d, have the coverslip of cell to take out with long, 95% ethanol is 30min fixedly, and is standby.
2.3 hybridizing method
2.3.1 probe preparation and labelling
Plasmid pSP65-BMP2 and pGEX2T-BMP contain the cDNA fragment of BMP2 and BMP3 respectively, use the alkaline lysis method of extracting plasmid, enzyme action behind the purification, reclaim required fragment, adopt random priming label probe (DIG DNA Labeling and Detection kit, BoehringerMannheim Company)
2.3.2 in situ hybridization step
Paraffin section dewaxes to DEPC (pyrocarbonic acid diethyl ester) water and 0.1mol/LPBS (pH7.4,0.1mol/LPBS:NaCl8.5g, KH through routine 2PO 40.2g, Na 2HPO 4.12H 2O 2.9g, KCl 0.2g is with supplying 100ml behind the dissolved in distilled water.) after, use 0.2mol/L HCL and E.C. 3.4.21.64 (1ug/ml) to handle respectively, in 0.2% glycine and 10 minutes, after 4% paraformaldehyde room temperature is fixed 30 minutes; Gradient alcohol dehydration, drying at room temperature, the BMPs concentration and probe concentration is 1ug/ml, 42 ℃ of wet box hybridization are after 20 hours, 2 * SSC (2 * SSC:0.3mol/L sodium chloride, 0.03mol/L sodium citrate) room temperature is shaken and is washed 15 minutes * 3,1 * SSC (1 * SSC solution: 0.15mol/LNaCl, 0.015mol/L sodium citrate) room temperature is shaken and is washed 15 minutes * 3,0.5 * SSC37 ℃ is shaken and washes 15 minutes * 3, Buffer (buffer agent) I (100mmol/L Tris-HCL pH7.5,150mmol/LNaCl) sealing of thorough washing 15 minutes * 2.2% normal sheep serum is after 30 minutes, drip anti-labelling alkali phosphatase DigiTAb (1: 100) 2 hours (37 ℃), through Buffer I, BufferIII (100mmol/L Tris-HCl pH9.5,100mmol/L NaCl, 50mmol/L MgCl 2) successively the washing after, with showing liquid BufferIII1000 μ l, levamisole 0.24mg, NBT (nitroblue tetrazolium) 4.5 μ l and BCIP (5-bromo-4-chloro-3-indyl phosphate ester, 5-Bromo-4-chloro-3-indolyl phosphate) colour developing of 3.5 μ l dark places is 2 hours, TE liquid stopped reaction, redye at the C.I. 42590 end, the transparent mounting of conventional dehydration.
Experiment contrast is set up blank and the RNase digestion contrast that does not add probe simultaneously, and positive control is for proving the osteosarcoma of positive reaction repeatedly, and every routine specimen is all done HE dyeing simultaneously.
3, result:
3.1 cell growing state
Being organized between people's dental papilla has primary cell to swim out of from the piece of tissue edge in 2~5d, be that the center is the radial arrangement growth with the piece of tissue.People's dental papilla mesenchymal cells mostly is fusiformis or star fibroblast-like cells greatly, and early stage cell is less lance shape cell, and minority has the projection more than 3, and cell broadens subsequently, and cell space is abundant, and endochylema is even, the nuclear circle, and kernel is clear.Cell cell growth before 18 generations is vigorous, and growth conditions is good, and is stable, cell poor growth then later on, aging.
3.2 cell growth curve, doubling time and origin are identified
1d after inoculation, people's dental papilla mesenchymal cells number descends to some extent, the bottom out of 2d cell number, and enter exponential phase.Cell growth curve is serpentine.People's dental papilla mesenchymal cells doubling time is 40.1h.
Adopt the method for ABC SABC that people's dental papilla mesenchymal cells of being cultivated is carried out anti-waveform fibroin, anti-keratin dyeing, cell is the tangible anti-waveform fibroin positive, is evenly distributed in the endochylema; The anti-keratin feminine gender.Show that cultured cells is not the fibroblast-like cells in epithelial cell but mesoderm source.
3.3 in situ hybridization result
People's dental papilla mesenchymal cells BMP2mRNA of In vitro culture and BMP3mRNA positive hybridization signal a little less than; Cell is behind PTH effect 5d, and the expression of BMP2mRNA does not have significant change; And in cytoplasm, the BMP3mRNA positive hybridization signal appears, the hybridization positive material is a bluish violet fine particulate in the endochylema.
The influence that experimental example 2 pharmaceutical compositions of the present invention form dentin
Set up the animal model of hypoplasia of dentin by excising the rat parathyroid gland, observe the influence that hypoparathyroidism forms dentin.
Behind this laboratory observation excision rat parathyroid gland, manually give the change that dentin forms behind the PTH of various dose, observe with administration of PTH dosage and have or not dependency, detect total calcium content in the serum, observe the relation of calcium level and dentin formation.
One, experimental procedure
32 of the pure lines male SD rats of age 35d (5 week) are selected in laboratory animal and grouping for use, are divided into eight groups at random
I: normal control group (control)
II:: parathyroid gland is from body plantation group (PTT)
III. parathyroidectomy group (PTX), normal saline subcutaneous injection 1ml
IV: parathyroidectomy group (PTX), PTH subcutaneous injection every day 50 μ g/kg, inferior on every Saturdays.
V: parathyroidectomy group (PTX), PTH subcutaneous injection every day 100 μ g/kg, inferior on every Saturdays.
VI: parathyroidectomy group (PTX), PTH subcutaneous injection every day 200 μ g/kg, inferior on every Saturdays.
VII: parathyroidectomy group (PTX); Vitamin D3 intramuscular injection 2000U/ only, the next day once.
VIII: parathyroidectomy group (PTX); The PTH preparation is once oral every day, and is inferior on every Saturdays.
Two, method
21 operation methods
Rat with 2% penta crust than sodium intraperitoneal injection of anesthesia (40mg/kg), the depilation of 8% sodium sulfide cervical region, flushing is fixed on the operating-table, sterilization, drape vertically cuts skin, subcutaneous tissue at the neck middle part, exposes the thyroid parathyroid gland, grouping is later on carried out.
2.1.1II group: separate parathyroid gland, plant in the animal cervical region subcutaneous again.Postoperative 48h and 7d detect total calcium concentration in the blood.The rat that has only total calcium concentration to be maintained at normal level is used for further observation.After animal revived, free diet was fed in cage.
2.1.2III, IV, V, VI, VII, VIII group: parathyroidectomize fully, sew up.Postoperative is organized with I.
2.2 total calcium is measured
Rat tails venous blood collection 0.3ml, operation the previous day blood sampling once, blood sampling in later per three days is once measured the blood total calcium content with MTB (methyl Bai Lixiang phenol blue laws), until putting to death rat the previous day.Reduce to 6mg/dl when following (being about PTX11 day) when blood calcium, count experiment 0 day, each group is put to death the animal of half around the experiment, remaining half continue experiment to 12 weeks and put to death.
2.3 labelling
Each is organized all and is testing day the previous day and putting to death rat and to injecting tetracycline (10mg/kg) in the rat peritoneum dentin is carried out labelling the previous day.After injecting tetracycline for the first time, give the intraperitoneal injection of rat 10mg/kg calcein two weeks.
2.4 draw materials with sample process
Put to death rat, take off tooth jaw tissue, pull out the lower jaw incisor, be separately fixed at a week in 10% formalin solution, with compound sour decalcification, conventional dehydration, defat, embedding, cut along lower jaw incisor center sagittal, be made into the section of thickness<10 μ m, under fluorescence microscope, observe.
Three, result
1, postoperative animal ordinary circumstance record:
2, fluorescence microscope is observed down:
3, dentin deposition (injecting the labelling latter end calcein and the second time distance between the tetracycline, μ m per day):
IV, V, VI organize the dentin deposition between III group and I, II group, and raise with the PTH injected dose.
VII, VIII group dentin deposition is higher than the III group, compares with IV, V, VI group.
The yellow rate of labelling latter end calcium plain with inject Dentinal area (mm2) between the tetracycline second time:
IV, V, VI organize the dentin area between III group and I, II group, and raise with the PTH injected dose.
VII, VIII group dentin area is higher than the III group, compares with IV, V, VI group.
3, total calcium content changes
Draw five groups of total calcium content change curves, I, II group blood calcium is kept normally constant substantially, and the III group is maintained at low-level, and IV, V, VI group all are higher than the III group, are lower than the I group, and raise with the PTH injected dose.VII, VIII group is higher than the III group, compares with IV, V, VI group.
Above-mentioned experiment proves that fully parathyroid hormone has the effect of treatment hypoplasia of dentin, has the purposes that promotes that people's dental papilla mesenchymal cells bone morphogenetic protein(BMP) is expressed, under the effect of PTH, the BMP3 gene is activated, expresses, participate in inducing of dental papilla mesenchymal cells and break up by autocrine and paracrine action, promote the formation of dentin and dentin sample substrate, solved the problem of synthetic PTH in the body, and PTH is near physiological level, it is longer at the normal value leveled time to keep PTH, and have no side effect, be easy to apply.
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Claims (5)

1. the purposes of parathyroid hormone in the pharmaceutical composition of preparation treatment hypoplasia of dentin disease.
2. purposes according to claim 1 is characterized in that: described pharmaceutical composition is injection or injectable powder.
3. purposes according to claim 1 is characterized in that: described pharmaceutical composition is the subcutaneous injection agent.
4. purposes according to claim 1, its feature exists: described pharmaceutical composition is an oral formulations.
5. according to each described purposes of claim 1~4, it is characterized in that: parathyroid hormone 0.5mg~4mg is contained in every preparation unit of described pharmaceutical composition.
CNB2004100224314A 2004-04-30 2004-04-30 Purposes of parathyroid hormone Expired - Fee Related CN100406059C (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1142772A (en) * 1993-12-23 1997-02-12 艾里利克斯生物药物公司 Parathyroid hormone formulation
US20020094951A1 (en) * 1997-07-22 2002-07-18 Noboru Horiuchi Dental remedies containing pth

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1142772A (en) * 1993-12-23 1997-02-12 艾里利克斯生物药物公司 Parathyroid hormone formulation
US20020094951A1 (en) * 1997-07-22 2002-07-18 Noboru Horiuchi Dental remedies containing pth

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
甲状旁腺激素对牙乳头间充质细胞、组织影响的实验研究. 陈新梅,肖明振,论文正文第59,64,65,75,76和83页,中国优秀博硕士学位论文全文数据库. 1998
甲状旁腺激素对牙乳头间充质细胞、组织影响的实验研究. 陈新梅,肖明振,论文正文第59,64,65,75,76和83页,中国优秀博硕士学位论文全文数据库. 1998 *

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