CN105797139A - Application of PTH combining SDF-1 in preparing medicine for improving periodontal tissue regeneration - Google Patents

Application of PTH combining SDF-1 in preparing medicine for improving periodontal tissue regeneration Download PDF

Info

Publication number
CN105797139A
CN105797139A CN201610252121.4A CN201610252121A CN105797139A CN 105797139 A CN105797139 A CN 105797139A CN 201610252121 A CN201610252121 A CN 201610252121A CN 105797139 A CN105797139 A CN 105797139A
Authority
CN
China
Prior art keywords
sdf
pth
periodontal
application
cell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610252121.4A
Other languages
Chinese (zh)
Inventor
葛少华
杜令倩
王芳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong University
Original Assignee
Shandong University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shandong University filed Critical Shandong University
Priority to CN201610252121.4A priority Critical patent/CN105797139A/en
Publication of CN105797139A publication Critical patent/CN105797139A/en
Pending legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00Medicinal preparations containing peptides
    • A61K38/16Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • A61K38/17Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • A61K38/22Hormones
    • A61K38/29Parathyroid hormone, i.e. parathormone; Parathyroid hormone-related peptides
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00Medicinal preparations containing peptides
    • A61K38/16Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • A61K38/17Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • A61K38/19Cytokines; Lymphokines; Interferons
    • A61K38/195Chemokines, e.g. RANTES

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Immunology (AREA)
  • Medicinal Chemistry (AREA)
  • Gastroenterology & Hepatology (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Endocrinology (AREA)
  • Zoology (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Proteomics, Peptides & Aminoacids (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)

Abstract

The invention discloses application of PTH combining SDF-1 in preparing medicine for improving periodontal tissue regeneration. A medicinal form of the SDF-1 is a medical collagen repairing film containing the SDF-1. Stem cells can be regulated to differentiate in the osteogenesis direction by jointly using the medical collagen repairing film containing the SDF-1 and the PTH to guide formation of new periodontal attachment. The medical collagen repairing film containing the SDF-1 is excellent in physical property, good in flexibility, degradable in a body and good in biocompatibility; a porous net-shaped three-dimensional structure of the medical collagen repairing film can continuously maintain an isolating barrier effect of a tissue, can provide space for the collected stem cells and facilitates attachment, proliferation and differentiation of the stem cells.

Description

PTH associating SDF-1 application in preparation promotes the medicine of paradenlal tissue regeneration
Technical field
The present invention relates to PTH associating SDF-1 application in preparation promotes the medicine of paradenlal tissue regeneration.
Background technology
Periodontal disease causes alveolar bone to destroy absorption, and Periodontal Supporting Tissue lacks, and is the main cause causing loss of tooth.Tooth The main target of week sick treatment is to obtain the regeneration of periodontal tissue.The effect of paradenlal tissue regeneration treatment is largely dependent upon The quality and quantity of the periodontal regenerative sexual cell of disease damage Local residues, yet with the impact of long-term chronic inflammation, lesional area tooth All lazy weights of regenerative cell, function are the best.How to obtain the key that enough periodontal regenerative sexual cells are periodontal disease therapeutics. In recent years, tissue engineering technique becomes the focus of research.But it is translated into clinical practice to remain at many obstacles.
Stroma cell derivative factor-l (Stromal cell derived factor-1, SDF-1) is a kind of important cell chemotactic factor, In the existing numerous researchs of medical science other field.CXCR4 (C-X-C chemokine receptor type 4) is the receptor of SDF-1, Being expressed in multiple ancestral cells surface, can couple mediation it migrates with SDF-1.Impaired mouse brain, heart, muscle, During liver, kidney, skin and knitting, the rising of damaged part SDF-1 can as potential chemoattractant, raise blood circulation or Stem cell/the precursor of local expression CXCR4, produces tissue-specific differentiation to repair wound.SDF-1 is to periodontal membrane Stem cell has chemotactic and promotees the effect of proliferation and differentiation, and topical application SDF-1 can remarkably promote mescenchymal stem cell and hematopoietic stem cell Going back to the nest to periodontal and create district, promote angiogenesis, reduce inflammation reaction, increases new bone volume and density, strengthens area of new bone quality, It it is a kind of chemoattractant in original position organizational project with application prospect.But, its action effective is affected by DPP-IV/CD26. CD26 is II type transmembrane glycoprotein, and the many hematopoietic cells such as T activated and bone-marrow-derived lymphocyte, capillary endotheliocyte, epithelium is thin Born of the same parents and stem cell are expressed DPP-IV, DPP-IV and are also present in blood plasma with soluble active.DPP-IV can crack and include SDF-1 is at interior many chemotactic factors, somatomedin, nerve polypeptide and other important polypeptide.Therefore, searching can suppress The preparation of SDF-1 degraded, for improving the activity of SDF-1, promotes that tissue regeneration effect has great importance.
Parathyroid hormone (parathyroid hormone, PTH) is unique dredging for treating sclerotin through U.S. FDA approval The bone anabolism medicine of pine, its level raises can promote bone metabolism.Vivo and vitro experiment all proves that intermittent application PTH is to bone Anabolism has facilitation.At cellular level, batch applications PTH can promote that bone stave cell is divided into osteoblast, makes Osteoblastic quantity increases.In tissue level, as intermittence application PTH, PTH can promote the anabolism of bone, performance Area, density and intensity for bone increase.PTH also has stem cell mobilization effect, and research shows that PTH can effectively mobilize Marrow stromal cell enters blood.Ischemia (damage) can excite the depression effect to DPP-IV that PTH mediates, thus on Adjust the level of SDF-1, thus be conducive to raising CXCR4+ cell and move cell from bone marrow through blood flow migrates to ischemic tissue. The precursor that intermittent application PTH can be effectively facilitated mice is mobilized.
But, by regulation and control SDF-1/CXCR4 axle, current PTH promotes that heart and injury side is more of concentrated in the research of tissue regeneration Face, the research being applied to other tissue injurys is the fewest, if the damage academia being adapted to its hetero-organization there is no unified viewpoint. Not being both with heart ischemia damage, periodontal disease is a kind of chronic infectious disease, due to the chronic inflammation that periodontal lesional area is long-term Disease causes the hard and soft tissue including gingiva, periodontal membrane, alveolar bone and cementum to damage, its pathogenesis and cure mechanism with Heart ischemia damage is entirely different, and therefore can PTH Yu SDF-1 be combined and be used for the regeneration of periodontal tissue and have and greatly can not Expection property, and be not currently also related to PTH associating SDF-1 and treat the report of periodontal tissue's damage.
Summary of the invention
For above-mentioned prior art, it is an object of the invention to provide PTH associating SDF-1 and promote paradenlal tissue regeneration in preparation Application in medicine.
For achieving the above object, the present invention uses following technical proposals:
A first aspect of the present invention, it is provided that PTH associating SDF-1 application in preparation promotes the medicine of paradenlal tissue regeneration.
In above-mentioned application, the medicinal forms of described SDF-1 is the medical collagen repair membrane containing SDF-1.
In above-mentioned application, in the described medical collagen repair membrane containing SDF-1, the content of SDF-1 is that 5-8 μ g/ opens;It is preferably 5 μ g/ open.
A second aspect of the present invention, it is provided that a kind of medicine treating periodontal disease, comprises PTH and SDF-1, PTH and SDF-1 Weight ratio be 1:3-5.It is preferably 1:4.
Although it should be noted that the report of the most existing PTH associating SDF-1 treatment heart and injury, but there is no the two combination and promote Enter the research report of paradenlal tissue regeneration.Owing to the site of tissue damage of human body has multiple, the cell regeneration energy of different damage locations Power also significant difference, therefore, treatment thoughts and medicine for different tissues damage location are the most varied, different tissues Portability is not had between the medicine of damage.So the drug combination of the present invention possesses unobviousness.The present invention will PTH associating SDF-1 is for the treatment of periodontal tissue's damage, it is possible to produce the collaborative effect promoting tissue regeneration.External internal It is demonstrated experimentally that PTH associating SDF-1 has extraordinary therapeutic effect to periodontal tissue's damage.
Beneficial effects of the present invention:
The present invention is combined with PTH by the medical collagen repair membrane containing SDF-1, it is possible to stem cell breaks up to skeletonization direction in regulation and control, Guide the formation of new-attachment of periodontium.Wherein, the good physical properties of the medical collagen repair membrane containing SDF-1, pliability is good, Can degradation in vivo, good biocompatibility, the three dimensional structure of its holey can not only persistently maintain the isolation barrier effect of tissue, Space, beneficially stem cell can also be provided to adhere to for the stem cell raised, breed and differentiation.The present invention uses medical collagen to repair Laminating adhesive is that carrier carries SDF-1, it is possible to promotes the stem cell recruitment effect of SDF-1, provides attachment site for cell, is conducive to It is created district's field planting at periodontal, breeds and differentiation.Meanwhile, the combination of medical collagen repair membrane and SDF-1 also can reduce SDF-1 and exists The loss in paradental defect district and volatilization, make defect local maintain higher drug level and slowly discharge, thus effectively play pharmacology Effect.
Accompanying drawing explanation
Fig. 1: PTH combines promotion Periodontal ligament stem cell with SDF-1 breeds and migration results;
The impact that periodontal ligament stem cell alkaline phosphatase activities and Mineral nodules are formed by Fig. 2: PTH and SDF-1 use in conjunction;
Fig. 3: PTH and SDF-1 use in conjunction is on periodontal ligament stem cell BSP, the impact of OCN and Runx2 gene expression;
Fig. 4: PTH combines the recruitment to rat periodontal ligament defective region CXCR4+ cell with SDF-1;
Fig. 5: PTH combines with SDF-1 rat periodontal ligament defective region MSCs is raised effect;
Ge Zu paradental defect district periodontal osteanagenesis situation is compared in Fig. 6: postoperative different times H&E dyeing;
Cementum, periodontal membrane fiber regeneration situation are respectively organized in Fig. 7: healing later stage H&E dyeing;
Fig. 8: paradental defect district skeletonization associated protein immunohistochemical staining and TRAP dyeing.
Detailed description of the invention
The present invention is further illustrated in conjunction with the embodiments, it should explanation, the description below merely to explain the present invention, Its content is not defined.
Embodiment 1:PTH is studied with the united experiment in vitro of SDF-1
1. experimental technique:
Separate from the healthy premolars pulled out because correction needs, cultivate Periodontal ligament stem cell (human periodontal Ligament stem cells, hPDLSCs), screen single cell clone with limiting dilution assay;In experiment in vitro, the application of SDF-1 is dense Degree is 50ng/ml for the application concentration of 200ng/ml, PTH, and PTH is intermittent application.Experiment is divided into four groups: A group for the moon Property matched group, without PTH and SDF-1;B group PTH Han 50ng/ml;C group SDF-1 Han 200ng/ml;D group contains 50ng/ml PTH and 200ng/ml SDF-1.In B group and D group, PTH is intermittent application, i.e. in the cultivation cycle of every 48h, At initial 6h, cell adds the culture fluid containing 50ng/ml PTH.After cell is exposed to PTH 6h, changing liquid, cell exists Without being further cultured for 42h in the culture fluid of PTH, every 48h changes a culture fluid.
(1) by cell viability detection kit (cell-counting kit-8, CCK8), cell migration assay detection PTH with SDF-1 combines the impact migrating periodontal ligament stem cell and breeding.
(2) gathered by alkali phosphatase (Alkaline phosphatase, ALP) active testing, Alizarin red staining method and real-time quantitative Synthase chain reaction (quantitative real-time polymerase chain reaction, qRT-PCR) measures PTH with SDF-1 and combines The application impact on hPDLSCs Osteoblast Differentiation ability.
(3) use SPSS16.0 statistical analysis software to carry out statistical analysis, relevant parameter used one factor analysis of variance, Data all represent with meansigma methods ± standard error (Mean ± SEM).< when 0.05, difference has statistical significance to P.
2. experimental result:
(1) being successfully separated and turn out Periodontal ligament stem cell, cellular morphology is normal, in good condition.
(2) PTH Yu SDF-1 use in conjunction can promote propagation and the transfer ability of PDLSCs: CCK8 result shows PTH Promote that with SDF-1 use in conjunction the effect of cell proliferation is the strongest (P < 0.05) (A in Fig. 1);Migrate experiment and show that experimental group all can Promote the migration (P<0.05) of periodontal ligament stem cell, after associating PTH, make rush migration effect higher (P>0.05) (Fig. 1 of SDF-1 Middle B-C).
(3) PTH Yu SDF-1 use in conjunction can promote the Osteoblast Differentiation of PDLSCs: ALP active testing result is cell When cultivating 7 days, PTH and SDF-1 use in conjunction can dramatically increase ALP activity (P < 0.05), experiment when cell is cultivated 14 days ALP activity between group and matched group there was no significant difference (P > 0.05), shows that PTH Yu SDF-1 use in conjunction is trained at cell The early stage supported can increase ALP activity (A in Fig. 2);Alizarin red staining result shows that PTH with SDF-1 use in conjunction can be notable Promote the formation (P < 0.05) (B-C in Fig. 2) of Mineral nodules;QRT-PCR result display PTH Yu SDF-1 use in conjunction can Raise skeletonization Research of predicting markers resorption lacunae (bone sialoprotein, BSP), Runt associated transcription factor 2 (runt related Transcription factor 2, Runx2), the gene expression dose (P < 0.05) (Fig. 3) of Bone Gla protein (osteocalcin, OCN).
Embodiment 2:PTH is studied with the united experiment in vivo of SDF-1
1. experimental technique:
Select 60 male Wistar rats (8 week old, 220~250g), by number of animals, be randomly divided into two big groups, often group Lumbar injection PTH (the 40 μ g/kg) next day of 30: one group, another organizes lumbar injection normal saline.All rats are cooked bilateral Mandibular bone is windowed defect, places the collagem membrane containing SDF-1 (5 μ g) in the defect of left side, and the collagem membrane containing PBS is placed on right side.This reality Test and be divided into 4 groups: only at the matched group of the blank collagem membrane of defect local placement, local applying SDF-1 group, lumbar injection PTH group, Local applies SDF-1 lumbar injection PTH group simultaneously.Take 3 days, 1 week, 2 weeks, 4 weeks, 8 weeks when collecting as Postoperative Specimen Between point, often group takes 6 samples in each time.Fixing rear conventional EDTA decalcification in 4% paraformaldehyde after sampling, dehydration, Transparent, paraffin embedding, prepare paraffin section.
Preparation method containing SDF-1 medical collagen repair membrane is: with PBS, the SDF-1 of powder being made into concentration is The solution of 50 μ g/ml, is placed in medical collagen repair membrane in SDF-1 solution, finally soaked collagem membrane is placed on 6 orifice plates In, place 12h for 4 DEG C and make it fully absorb liquid.SDF-1 and collagem membrane with magnitude relation: 5 μ g/ open.
(1) CXCR4 immunofluorescence dyeing and the double dye of CD34-/CD90+ immunofluorescence is used to observe paradental defect agglutination Middle PTH with SDF-1 combines the impact of the expression on SDF-1 receptor CXCR 4 and to mescenchymal stem cell (mesenchymal Stem cells, MSCs) raise situation.
(2) HE dyeing detection paradental defect district periodontal membrane, cementum, the regeneration situation of alveolar bone.
(3) row ALP, Runx2, type i collagen (collagen, Col I) immunohistochemical staining, and carry out anti-tartaic acid phosphorus Acid enzyme (Tartrate-resistant acid phosphatase, TRAP) dyeing, compares defective region skeletonization in four groups of agglutinations anti-with broken bone The difference answered.
(4) the data obtained all represents with mean ± standard deviation.Application SPSS16.0 statistical package, carries out list to relevant parameter Analysis of variance, < when 0.05, difference has statistical significance to P.
2. experimental result:
(1) postoperative laboratory animal all survives, and occurs without obvious inflammation and immunological rejection at defect.By to paraffin section CXCR4 immunofluorescence dyeing and the double dye of CD90+/CD34-immunofluorescence, result shows, each time point PTH with CXCR4+ cell and MSCs that SDF-1 associating is raised are all many compared with other groups, difference statistically significant (P < 0.05) (Fig. 4, 5)。
(2) paradental defect district H&E coloration result shows, PTH with SDF-1 combines can promote to create district's skeletonization in early days, and formed Level of Alveolar Bone pulp cavity is less, eburnation, and area of new bone area is higher than other each group and has significant difference (P < 0.05) (Fig. 6).Tooth All membrane fibers and cementum new life occur in healing later stage (4,8 weeks), and PTH+SDF-1 group neonatal tooth sclerotin goes out at the 4th Zhou Shiyi Existing, to the most relatively other group thickness when the 8th week.By by each group of new life fiber angles compared with natural periodontal membrane angle (47.202 °), Find that the newborn periodontal membrane fiber angle (50.289 °) the 8th week PTH+SDF-1 group is most bordering on natural teeth week film (Fig. 7).
(3) skeletonization associated protein immunohistochemical staining result shows, PTH with SDF-1 combines can promote that paradental defect heals Commitment ALP and Runx2 expresses, and has significant difference (P < 0.05) with other each group.Phase after healing, PTH+SDF-1 group Col I expression is higher, and SDF-1 group no significant difference (P > 0.05), but higher than PTH group and matched group, difference has statistics to anticipate Justice (P < 0.05).TRAP coloration result shows, PTH with SDF-1 combines can activate osteoclast generation in early days, promotes the conjunction of bone Become metabolism (Fig. 8).
Although the detailed description of the invention of the present invention is described by the above-mentioned accompanying drawing that combines, but not limit to scope System, one of ordinary skill in the art should be understood that on the basis of technical scheme, and those skilled in the art need not pay Go out various amendments or deformation that creative work can make still within protection scope of the present invention.

Claims (7)

1.PTH associating SDF-1 application in preparation promotes the medicine of paradenlal tissue regeneration.
Apply the most as claimed in claim 1, it is characterised in that the medicinal forms of described SDF-1 is medical containing SDF-1 Collagen repair membrane.
Apply the most as claimed in claim 2, it is characterised in that in the described medical collagen repair membrane containing SDF-1, SDF-1 Content be that 5-8 μ g/ opens.
Apply the most as claimed in claim 3, it is characterised in that in the described medical collagen repair membrane containing SDF-1, SDF-1 Content be that 5 μ g/ open.
5. treating a medicine for periodontal disease, the weight ratio comprising PTH and SDF-1, PTH and SDF-1 is 1:3-5.
6. medicine as claimed in claim 5, it is characterised in that the weight ratio of PTH Yu SDF-1 is 1:4.
7. comprise the clinical preparation of medicine described in claim 5.
CN201610252121.4A 2016-04-21 2016-04-21 Application of PTH combining SDF-1 in preparing medicine for improving periodontal tissue regeneration Pending CN105797139A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610252121.4A CN105797139A (en) 2016-04-21 2016-04-21 Application of PTH combining SDF-1 in preparing medicine for improving periodontal tissue regeneration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610252121.4A CN105797139A (en) 2016-04-21 2016-04-21 Application of PTH combining SDF-1 in preparing medicine for improving periodontal tissue regeneration

Publications (1)

Publication Number Publication Date
CN105797139A true CN105797139A (en) 2016-07-27

Family

ID=56458316

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610252121.4A Pending CN105797139A (en) 2016-04-21 2016-04-21 Application of PTH combining SDF-1 in preparing medicine for improving periodontal tissue regeneration

Country Status (1)

Country Link
CN (1) CN105797139A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112220967A (en) * 2020-11-26 2021-01-15 山东大学 Targeting antibacterial and in-situ bone-promoting dual-functional material and preparation method and application thereof

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Y. JUNG等: "Regulation of SDF-1 (CXCL12) production by osteoblasts; a possible mechanism for stem cell homing", 《BONE》 *
葛少华等: "PTH和SDF-1联合应用对牙周膜干细胞生物学活性及牙周组织再生的影响", 《2016牙周病学学术研讨会论文集》 *
褚云娟: "基质细胞衍生因子-1(SDF-1)与牙周组织自体(原位)再生", 《口腔医学研究》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112220967A (en) * 2020-11-26 2021-01-15 山东大学 Targeting antibacterial and in-situ bone-promoting dual-functional material and preparation method and application thereof
CN112220967B (en) * 2020-11-26 2021-08-03 山东大学 Targeting antibacterial and in-situ bone-promoting dual-functional material and preparation method and application thereof

Similar Documents

Publication Publication Date Title
Qiu et al. Enhancement of periodontal tissue regeneration by conditioned media from gingiva-derived or periodontal ligament-derived mesenchymal stem cells: a comparative study in rats
Liu et al. Local administration of stromal cell-derived factor-1 promotes stem cell recruitment and bone regeneration in a rat periodontal bone defect model
Miyahara et al. Monolayered mesenchymal stem cells repair scarred myocardium after myocardial infarction
Flores et al. Cementum–periodontal ligament complex regeneration using the cell sheet technique
Cao et al. Adenovirus-mediated transfer of hepatocyte growth factor gene to human dental pulp stem cells under good manufacturing practice improves their potential for periodontal regeneration in swine
Yu et al. Human gingiva-derived mesenchymal stromal cells contribute to periodontal regeneration in beagle dogs
Osugi et al. Conditioned media from mesenchymal stem cells enhanced bone regeneration in rat calvarial bone defects
Grzesik et al. Cementum and periodontal wound healing and regeneration
CN104324053B (en) A kind of dog stem cell secretion factor reparation liquid of quick healing dog wound tissue
CN104225681A (en) Tissue-engineered bone and preparation method thereof
Yu et al. Effects of short-term inflammatory and/or hypoxic pretreatments on periodontal ligament stem cells: in vitro and in vivo studies
CN103585177A (en) Applications of mesenchymal stem cell and genetically modified mesenchymal stem cell
Zhu et al. Applications of mesenchymal stem cells in liver fibrosis: novel strategies, mechanisms, and clinical practice
CN105013014A (en) Preparation method and application of acellular matrix biological material
CN105255824A (en) Periodontal ligament stem cell osteogenic differentiation inducing liquid and method
Sándor et al. Combining adipose-derived stem cells, resorbable scaffolds and growth factors: An overview of tissue engineering
Dziedzic et al. Adipose-derived stromal cells and mineralized extracellular matrix delivery by a human decellularized amniotic membrane in periodontal tissue engineering
CN105797139A (en) Application of PTH combining SDF-1 in preparing medicine for improving periodontal tissue regeneration
CN103387959A (en) Stem cell from deciduous teeth, and preparation method and application thereof
CN103736150A (en) Application of melatonin synergistic extracellular matrix biomaterial to preparation of medicament for promoting osteoblast differentiation of mesenchymal stem cells
Feng et al. Periodontal ligament‐like tissue regeneration with drilled porous decalcified dentin matrix sheet composite
CN101182493A (en) Transgenic mesenchyma stem cell for curing radiation enteritis and method of producing the same
Bi et al. Hertwig's epithelial root sheath cells show potential for periodontal complex regeneration
CN105326864A (en) Stem cell-based preparation for treating systemic lupus erythematosus and preparation method thereof
Khan et al. Salivary gland tissue engineering to attain clinical benefits: a special report

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20160727

RJ01 Rejection of invention patent application after publication