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Dolgalev AA, Svyatoslavov DS, Pout VA, Reshetov IV, Kastyro IV. Effectiveness of the Sequential Use of Plastic and Titanium Implants for Experimental Replacement of the Mandibular Defect in Animals Using Preliminary Digital Design. DOKL BIOCHEM BIOPHYS 2021; 496:36-39. [PMID: 33689072 DOI: 10.1134/s160767292101004x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 10/09/2020] [Accepted: 10/10/2020] [Indexed: 11/23/2022]
Abstract
Using the templates preliminarily made by 3D design and prototyping methods, defects in the lateral area of the lower jaw of sheep were created using the piezosurgical technique. The defects were replaced by plastic implants obtained by the method of layer-by-layer fusion of the FDM printing-fusing deposition modeling and fixation with titanium screws to the jaw body. In the time interval, plastic implants are replaced by titanium implants obtained by selective laser sintering (SLS) using a 3D printer. To study the processes of reparative osteogenesis, microsamples of tissues of the preimplantation zone were analyzed. As a result, signs of osteo- and fibro-osseointegration were identified. The obtained data are regarded as a prerequisite for further clinical trials of the developed protocols for the sequential replacement of jaw defects using 3D printing.
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Affiliation(s)
- Al Al Dolgalev
- Stavropol State Medical University, Ministry of Healthcare of the Russian Federation, Stavropol, Russia
| | | | - V A Pout
- Sechenov University, Moscow, Russia.,Witte Moscow University, Moscow, Russia
| | - I V Reshetov
- Sechenov University, Moscow, Russia.,Witte Moscow University, Moscow, Russia
| | - I V Kastyro
- Witte Moscow University, Moscow, Russia. .,Peoples' Friendship University of Russia (RUDN University), Moscow, Russia.
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Fu J, Zhuang C, Qiu J, Ke X, Yang X, Jin Z, Zhang L, Yang G, Xie L, Xu S, Gao C, Gou Z. Core-Shell Biphasic Microspheres with Tunable Density of Shell Micropores Providing Tailorable Bone Regeneration. Tissue Eng Part A 2018; 25:588-602. [PMID: 30215296 DOI: 10.1089/ten.tea.2018.0174] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
IMPACT STATEMENT We have developed the new core-shell bioceramic CSi-Sr4@CaP-px microspheres with tuning porous shell layer so that the biodegradation of both CSi-Sr4 core and CaP shell is readily adjusted synergistically. This is for the first time, to the best of our knowledge, that the bioceramic scaffolds concerning gradient distribution and microstructure-tailoring design is available for tailoring biodegradation and ion release (bioactivity) to optimizing osteogenesis. Furthermore, it is possibly helpful to develop new bioactive scaffold system for time-dependent tailoring bioactivity and microporous structure to significantly enhance bone regeneration and repair applications, especially in some non-load-bearing arbitrary 3D anatomical bone and teeth defects.
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Affiliation(s)
- Jia Fu
- 1 Department of Orthopaedic Surgery, The Third Hospital Affiliated to Wenzhou Medical University , Rui'an, China
| | - Chen Zhuang
- 2 Bio-Nanomaterials and Regenerative Medicine Research Division, Zhejiang-California International Nanosystem Institute, Zhejiang University , Hangzhou, China
| | - Jiandi Qiu
- 1 Department of Orthopaedic Surgery, The Third Hospital Affiliated to Wenzhou Medical University , Rui'an, China
| | - Xiurong Ke
- 1 Department of Orthopaedic Surgery, The Third Hospital Affiliated to Wenzhou Medical University , Rui'an, China
| | - Xianyan Yang
- 2 Bio-Nanomaterials and Regenerative Medicine Research Division, Zhejiang-California International Nanosystem Institute, Zhejiang University , Hangzhou, China
| | - Zhouwen Jin
- 2 Bio-Nanomaterials and Regenerative Medicine Research Division, Zhejiang-California International Nanosystem Institute, Zhejiang University , Hangzhou, China
| | - Lei Zhang
- 1 Department of Orthopaedic Surgery, The Third Hospital Affiliated to Wenzhou Medical University , Rui'an, China
| | - Guojing Yang
- 1 Department of Orthopaedic Surgery, The Third Hospital Affiliated to Wenzhou Medical University , Rui'an, China
| | - Lijun Xie
- 3 Department of Orthopaedic Surgery, The Second Affiliated Hospital, School of Medicine of Zhejiang University , Hangzhou, China
| | - Sanzhong Xu
- 4 Department of Orthopaedic Surgery, The First Affiliated Hospital, School of Medicine of Zhejiang University , Hangzhou, China
| | - Changyou Gao
- 2 Bio-Nanomaterials and Regenerative Medicine Research Division, Zhejiang-California International Nanosystem Institute, Zhejiang University , Hangzhou, China
| | - Zhongru Gou
- 2 Bio-Nanomaterials and Regenerative Medicine Research Division, Zhejiang-California International Nanosystem Institute, Zhejiang University , Hangzhou, China
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Pei X, Ma L, Zhang B, Sun J, Sun Y, Fan Y, Gou Z, Zhou C, Zhang X. Creating hierarchical porosity hydroxyapatite scaffolds with osteoinduction by three-dimensional printing and microwave sintering. Biofabrication 2017; 9:045008. [PMID: 28976356 DOI: 10.1088/1758-5090/aa90ed] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Hierarchical porosity, which includes micropores and macropores in scaffolds, contributes to important multiple biological functions for tissue regeneration. This paper introduces a two-step method of combining three-dimensional printing (3DP) and microwave sintering to fabricate two-level hierarchical porous scaffolds. The results showed that 3D printing made the macroporous structure well-controlled and microwave sintering generated micropores on the macropore surface. The resulting hierarchical macro/microporous hydroxyapatite scaffold induced bone formation following intramuscular implantation. Moreover, when comparing the hierarchical macro/microporous hydroxyapatite scaffold to the non-osteoinductive hydroxyapatite scaffolds (either 3D printed or H2O2 foamed) subjected to muffle sintering which do not have micropores, the critical role of micropores in material-driven bone formation was shown. The findings presented herein could be useful for the further optimization of bone grafting materials for bone regeneration.
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Affiliation(s)
- Xuan Pei
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, 610064, People's Republic of China
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Mechanical and biological properties of the micro-/nano-grain functionally graded hydroxyapatite bioceramics for bone tissue engineering. J Mech Behav Biomed Mater 2015; 48:1-11. [DOI: 10.1016/j.jmbbm.2015.04.002] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 03/31/2015] [Accepted: 04/01/2015] [Indexed: 12/29/2022]
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Zhou C, Ye X, Fan Y, Ma L, Tan Y, Qing F, Zhang X. Biomimetic fabrication of a three-level hierarchical calcium phosphate/collagen/hydroxyapatite scaffold for bone tissue engineering. Biofabrication 2014; 6:035013. [PMID: 24873777 DOI: 10.1088/1758-5082/6/3/035013] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A three-level hierarchical calcium phosphate/collagen/hydroxyapatite (CaP/Col/HAp) scaffold for bone tissue engineering was developed using biomimetic synthesis. Porous CaP ceramics were first prepared as substrate materials to mimic the porous bone structure. A second-level Col network was then composited into porous CaP ceramics by vacuum infusion. Finally, a third-level HAp layer was achieved by biomimetic mineralization. The three-level hierarchical biomimetic scaffold was characterized using scanning electron microscopy, energy-dispersive x-ray spectra, x-ray diffraction and Fourier transform infrared spectroscopy, and the mechanical properties of the scaffold were evaluated using dynamic mechanical analysis. The results show that this scaffold exhibits a similar structure and composition to natural bone tissues. Furthermore, this three-level hierarchical biomimetic scaffold showed enhanced mechanical strength compared with pure porous CaP scaffolds. The biocompatibility and osteoinductivity of the biomimetic scaffolds were evaluated using in vitro and in vivo tests. Cell culture results indicated the good biocompatibility of this biomimetic scaffold. Faster and increased bone formation was observed in these scaffolds following a six-month implantation in the dorsal muscles of rabbits, indicating that this biomimetic scaffold exhibits better osteoinductivity than common CaP scaffolds.
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Affiliation(s)
- Changchun Zhou
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, 610064, People's Republic of China
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6
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Osteogenic matrix cell sheet transplantation enhances early tendon graft to bone tunnel healing in rabbits. BIOMED RESEARCH INTERNATIONAL 2013; 2013:842192. [PMID: 24106718 PMCID: PMC3784076 DOI: 10.1155/2013/842192] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Revised: 07/03/2013] [Accepted: 08/13/2013] [Indexed: 01/09/2023]
Abstract
The objective of this study was to determine whether osteogenic matrix cell sheets (OMCS) could induce bone formation around grafted tendons, thereby enhancing early stage tendon to bone tunnel healing in skeletally mature male Japanese white rabbits. First, the osteogenic potential of rabbit OMCS was evaluated. Then, the OMCS were transplanted into the interface between the grafted tendon and the bone tunnel created at the tibia. Histological assessments and biomechanical tensile testing were performed after 3 weeks. The rabbit OMCS showed high alkaline phosphatase (ALP) activity, positive staining of ALP, and osteogenic potential when transplanted subcutaneously with beta tricalcium phosphate disks. Newly formed bony walls and positive collagen type I staining were seen around the grafted tendon with OMCS transplantation, whereas such bony walls were thinner or less frequent without OMCS transplantation. Micro-computed tomography images showed significantly higher bone volume in the OMCS transplantation group. The pullout strength was significantly higher with OMCS (0.74 ± 0.23 N/mm(2)) than without OMCS (0.58 ± 0.15 N/mm(2)). These results show that OMCS enhance early tendon to bone tunnel healing. This method can be applied to cases requiring early tendon to bone tunnel healing after ligament reconstruction surgery.
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Zhi W, Zhang C, Duan K, Li X, Qu S, Wang J, Zhu Z, Huang P, Xia T, Liao G, Weng J. A novel porous bioceramics scaffold by accumulating hydroxyapatite spherulites for large bone tissue engineeringin vivo. II. Construct large volume of bone grafts. J Biomed Mater Res A 2013; 102:2491-501. [DOI: 10.1002/jbm.a.34919] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Revised: 07/30/2013] [Accepted: 08/05/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Wei Zhi
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education); School of Materials Science and Engineering, Southwest Jiaotong University; Chengdu Sichuan 610031 China
| | - Cong Zhang
- Department of Orthopedics; 452nd Hospital of Chinese PLA; Chengdu Sichuan 610021 China
| | - Ke Duan
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education); School of Materials Science and Engineering, Southwest Jiaotong University; Chengdu Sichuan 610031 China
| | - Xiaohong Li
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education); School of Materials Science and Engineering, Southwest Jiaotong University; Chengdu Sichuan 610031 China
| | - Shuxin Qu
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education); School of Materials Science and Engineering, Southwest Jiaotong University; Chengdu Sichuan 610031 China
| | - Jianxin Wang
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education); School of Materials Science and Engineering, Southwest Jiaotong University; Chengdu Sichuan 610031 China
| | - Zhuoli Zhu
- State Key Laboratory of Oral Diseases; Sichuan University; Chengdu Sichuan 610065 China
| | - Peng Huang
- Department of Orthopedics; 452nd Hospital of Chinese PLA; Chengdu Sichuan 610021 China
| | - Tian Xia
- Department of Orthopedics; 452nd Hospital of Chinese PLA; Chengdu Sichuan 610021 China
| | - Ga Liao
- State Key Laboratory of Oral Diseases; Sichuan University; Chengdu Sichuan 610065 China
| | - Jie Weng
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education); School of Materials Science and Engineering, Southwest Jiaotong University; Chengdu Sichuan 610031 China
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Osteoinduction of calcium phosphate biomaterials in small animals. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:1254-60. [DOI: 10.1016/j.msec.2012.12.023] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2012] [Revised: 10/05/2012] [Accepted: 12/03/2012] [Indexed: 11/20/2022]
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Abstract
It is a great honour that
Interface Focus
will publish a special issue to introduce the progress and achievements of biomaterials research in China. We feel it is a good opportunity to present the progress in Chinese biomaterials research to the international biomaterials community, and to promote the collaboration between international and Chinese biomaterials scientists.
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Affiliation(s)
- Xingdong Zhang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Fuzhai Cui
- Institute of Regenerative Medical Materials, Tsinghua University, Beijing 100084, China
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Wang C, Xue Y, Lin K, Lu J, Chang J, Sun J. The enhancement of bone regeneration by a combination of osteoconductivity and osteostimulation using β-CaSiO3/β-Ca3(PO4)2 composite bioceramics. Acta Biomater 2012; 8:350-60. [PMID: 21925627 DOI: 10.1016/j.actbio.2011.08.019] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2011] [Revised: 08/17/2011] [Accepted: 08/23/2011] [Indexed: 10/17/2022]
Abstract
β-Tricalcium phosphate (β-TCP) is osteoconductive, while β-calcium silicate (β-CS) is bioactive with osteostimulative properties. Porous β-CaSiO(3)/β-Ca(3)(PO(4))(2) composite bioceramic scaffolds with various β-TCP:β-CS ratios were designed to combine both osteoconductivity and osteostimulation in order to enhance bone regeneration. The composite scaffolds were implanted in critical sized femur defects (6×12 mm) for 4, 12 and 26weeks with pure β-TCP and β-CS scaffolds as the controls. The in vivo biodegradation and bone regeneration of the specimens were investigated using sequential histological evaluations, immunohistochemical examination and micro-computed tomography technology. The results showed that the scaffolds with 50 and 80 wt.% β-CS dramatically enhanced the amount of newly formed bone and reduced the degradation rate. In contrast, porous β-CS displayed poor new bone formation due to its rapid degradation, while porous β-TCP showed moderate bone regeneration starting on the surface of the implants, due to a lack of osteostimulation. More importantly, the scaffolds with 50 and 80 wt.% β-CS not only had excellent osteoconductivity, but also stimulated rapid bone formation, and they could degrade progressively at a rate matching the regeneration of new bone. In summary, our findings indicated that the degradation rate and bioactivity of β-CS/β-TCP composite bioceramic scaffolds could be adjusted by controlling the ratio of β-CS to β-TCP, suggesting the potential application of β-CS/β-TCP composite bioceramic scaffolds with 50 and 80 wt.% β-CS component in hard tissue regeneration and bone tissue engineering.
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11
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Yang RN, Ye F, Cheng LJ, Wang JJ, Lu XF, Shi YJ, Fan HS, Zhang XD, Bu H. Osteoinduction by Ca-P biomaterials implanted into the muscles of mice. J Zhejiang Univ Sci B 2011; 12:582-90. [PMID: 21726066 DOI: 10.1631/jzus.b1000204] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The osteoinduction of porous biphasic calcium phosphate ceramics (BCP) has been widely reported and documented, but little research has been performed on rodent animals, e.g., mice. In this study, we report osteoinduction in a mouse model. Thirty mice were divided into two groups. BCP materials (Sample A) and control ceramics (Sample B) were implanted into the leg muscle, respectively. Five mice in each group were killed at 15, 30, and 45 d after surgery. Sample A and Sample B were harvested and used for hematoxylin and eosin (HE) staining, immunohistochemistry (IHC) staining, and Alizarin Red S staining to check bone formation in the biomaterials. Histological analysis showed that no bone tissue was formed 15 d after implantation (0/5) in either of the two groups. Newly-formed bone tissues were observed in Sample A at 30 d (5/5) and 45 d (5/5) after implantation; the average amounts of newly-formed bone tissues were approximately 5.2% and 8.6%, respectively. However, we did not see any bone tissue in Sample B until 45 d after implantation. Bone-related molecular makers such as bone morphogenesis protein-2 (BMP-2), collagen type I, and osteopontin were detected by IHC staining in Sample A 30 d after implantation. In addition, the newly-formed bone was also confirmed by Alizarin Red S staining. Because this is the report of osteoinduction in the rodent animal on which all the biotechnologies were available, our results may contribute to further mechanism research.
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Affiliation(s)
- Rui-na Yang
- Key Laboratory of Transplant Engineering and Immunology, Ministry of Health, West China Hospital, Sichuan University, Chengdu 610041, China
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Yao J, Li X, Bao C, Fan H, Zhang X, Chen Z. A novel technique to reconstruct a boxlike bone defect in the mandible and support dental implants with In vivo tissue-engineered bone. J Biomed Mater Res B Appl Biomater 2009; 91:805-812. [PMID: 19572300 DOI: 10.1002/jbm.b.31459] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The purpose of this study was to investigate the feasibility of using in vivo tissue-engineered (TE) bone to repair boxlike mandibular defect and support dental implant, and then provide experimental evidence for the future application of the novel technique in the clinical setting. The TE bone graft was constructed in vivo by implanting osteoinductive calcium phosphate (Ca-P) ceramics in the femoral muscles of dog for 8 weeks, then was transplanted to repair the autogeneic boxlike bone defect site created in one side of the mandible and simultaneously support a dental implant, while in the opposite side of the mandibular defect, the same ceramic was used directly as control. 8 weeks after transplantation, samples were harvested for analysis. The results demonstrated that the technique of in vivo tissue engineering improved the mechanical and biologic properties of ceramics significantly. After transplantation, the in vivo TE ceramic-bone grafts were involved in bone metabolism of the host and fused well with the host bone. The dental implants were stable and had been integrated with both TE bone grafts and autologous bone. Therefore, it is feasible to construct a live bone graft with osteoinductive Ca-P ceramics in vivo, then repair a mandibular bone defect, and support a dental implant. In conclusion, in vivo TE bone is a promising technique for bone repair.
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Affiliation(s)
- Jinfeng Yao
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610044, People's Republic of China.,West China Hospital of Stomatology, Sichuan University, Chengdu 610041, People's Republic of China
| | - Xiaoyu Li
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610044, People's Republic of China
| | - Chongyun Bao
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610044, People's Republic of China
| | - Hongsong Fan
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610065, People's Republic of China
| | - Xingdong Zhang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610065, People's Republic of China
| | - Zhiqing Chen
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610044, People's Republic of China
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Sun L, Wu L, Bao C, Fu C, Wang X, Yao J, Zhang X, van Blitterswijk CA. Gene expressions of Collagen type I, ALP and BMP-4 in osteo-inductive BCP implants show similar pattern to that of natural healing bones. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2009. [DOI: 10.1016/j.msec.2009.02.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Fang JY, Chen JP, Leu YL, Hu JW. The delivery of platinum drugs from thermosensitive hydrogels containing different ratios of chitosan. Drug Deliv 2008; 15:235-43. [PMID: 18446569 DOI: 10.1080/10717540802006674] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
New thermosensitive hydrogels of poly(N-isopropylacrylamide) (PNIPAAm) with chitosan (CPN) were prepared and evaluated for use in the delivery of the platinum drugs, cisplatin and carboplatin. The effects of polymers containing different ratios of chitosan on the physicochemical and drug release characteristics were examined. The sol-gel transition temperature of the hydrogels was determined by differential scanning calorimetry (DSC) and viscometry. Discrepancies in the transition temperature among the various polymer systems were more pronounced when determined by viscosity compared by DSC, with the CPN showing a higher transition temperature than PNIPAAm. The cross-sectional structure and surface topography of the hydrogels were examined by scanning electronic microscopy (SEM) and atomic force microscopy (AFM), respectively. The incorporation of chitosan further increased the entanglement of the hydrogel network. An increase in the chitosan ratio in the polymers (CPN-H) also increased the cross-linking structure. A smoother surface of hydrogel matrices was observed for CPN compared with PNIPAAm. All hydrogels tested significantly reduced drug release compared with an aqueous solution. The release rate of platinum drugs from PNIPAAm was retarded at the late stage. CPN matrices could continuously deliver platinum drugs during the experiment. The rate of release from CPN-H was generally slower than that from hydrogels and had a lower chitosan ratio (CPN-L), presumably due to the more-tortuous pathways in the hydrogels. Thermosensitive hydrogels like those prepared in this study may be a promising carrier for the delivery of platinum drugs, as the drug release can be controlled and sustained using CPN networks.
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Affiliation(s)
- Jia-You Fang
- Pharmaceutics Laboratory, Graduate Institute of Natural Products, Chang Gung University, Kweishan, Taoyuan, Taiwan.
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Tan Y, Wang G, Fan H, Wang X, Lu J, Zhang X. Expression of core binding factor 1 and osteoblastic markers in C2C12 cells induced by calcium phosphate ceramics in vitro. J Biomed Mater Res A 2007; 82:152-9. [PMID: 17269146 DOI: 10.1002/jbm.a.31125] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The in vivo osteoinductive capacity of porous calcium phosphate ceramics (Ca/P ceramics) with special structure and phase composition had been found for almost decades. The mechanism of the osteoinductivity of porous calcium phosphate is studied by C2C12 cells culture in this paper. C2C12 cells were cocultured with four kinds of porous Ca/P ceramics for 2 and 5 days, without adding other growth factors. The four kinds of Ca/P ceramics were pure HA sintered at 1250 degrees C and HA/TCP with a ratio of 60/40 sintered at 1100, 1200, and 1250 degrees C respectively. RT-PCR analysis found that the Ca/P ceramics induced the expression of Cbfa1, collagen type I, bone sialoprotein, and osteocalcin in C2C12 cells, while they did not induce mRNA expression of Indian hedgehog (IHH) that regulate chondrocyte differentiation. Our results showed that Ca/P ceramics alone were sufficient to induce C2C12 cells differentiation. The induction of bone-related markers expression by Ca/P ceramics in osteoprogenitor cells suggested that the osteogenesis induced by the ceramics was intramembranous and the osteoinductivity was their intrinsic property.
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Affiliation(s)
- Yanfei Tan
- Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
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16
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Bluteau G, Pilet P, Bourges X, Bilban M, Spaethe R, Daculsi G, Guicheux J. The modulation of gene expression in osteoblasts by thrombin coated on biphasic calcium phosphate ceramic. Biomaterials 2006; 27:2934-43. [PMID: 16436294 DOI: 10.1016/j.biomaterials.2006.01.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2005] [Accepted: 01/03/2006] [Indexed: 10/25/2022]
Abstract
For many years, fibrin sealants were associated with bone substitutes to promote bone healing. However, the osteoblastic response to fibrin sealant components remains poorly documented. In this study, MC3T3-E1 osteoblastic cells were cultured on biphasic calcium phosphate ceramic (MBCP) coated with Tissucol components (thrombin and fibrinogen). Analysis of osteoblastic differentiation markers by RT-PCR revealed that MBCP coated with Tissucol stimulated mRNA levels for osteocalcin and alkaline phosphatase (ALP). Of all the components of Tissucol, thrombin has been reported to affect osteoblastic behavior. Our results demonstrated that low thrombin concentrations (0.5-5 U/ml) stimulated mRNA levels for ALP, whereas high thrombin concentrations (50-100 U/ml) decreased mRNA levels for ALP and PTH/PTHrP receptor and also increased mRNA level for the osteoclastogenesis inhibitor OPG. As thrombin stimulated angiogenesis, we then wondered whether thrombin could influence the expression of angiogenic factors. Low thrombin concentrations were shown to up-regulate mRNA levels for VEGF-B and VEGF-R1, suggesting an autocrine/paracrine role for VEGF-B. Higher thrombin concentrations also up-regulated mRNA for VEGF-A and neuropilin-1. In conclusion, the association of MBCP with thrombin and fibrinogen appears to be a convenient scaffold for bone cell differentiation. Thrombin could also acts at the cellular level by increasing the angiogenic potential of osteoblasts as well as their responsiveness to thrombin and VEGF.
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Affiliation(s)
- Gilles Bluteau
- INSERM UMRS 791, Laboratory of Osteoarticular and Dental Tissue Engineering, University of Nantes, School of Dental Surgery, 1 Place Alexis Ricordeau, 44042 Nantes cedex 1, France
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Zhang Z, Kurita H, Kobayashi H, Kurashina K. Osteoinduction with HA/TCP Ceramics of Different Composition and Porous Structure in Rabbits. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/s1348-8643(05)80011-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abstract
Objective The purpose of this study is to explore the growth, differentiation and
osteogeneration of bone marrow stromal cells (BMSCs) on partially demineralized bone matrix (pDBM) and to generate bone tissue by tissue engineering approach in vivo. Methods Demineralized bone was processed from femur head of Shanghai white swine. Calcium content, porosity and pore size was measured respectively. In vitro osteogenic differentiated human BMSCs of passage 3 were seeded in pDBM. Adhesive rate of cells to pDBM was calculated 24hours after seeding. Distribution, growth and proliferation of BMSCs on pDBM were observed with fluorescent
DiI labeling. Matrix disposition was analyzed with SEM observation. Cell-material complex was implanted subcutaneously in nude mice. The implants were harvested at 8, 12 weeks post surgery and samples were observed by H&E staining. Results BMSCs adhered well on the material and the distribution of cells was uniform. The adhesive rate is 99.1%±1%. New bone formation was observed in implant of 8, 12 weeks respectively. The newly formed bone was generated on the surface of the residual material and a layer of cells with typical characteristic of osteoblast was
observed to adhere on the surface of the new bone. Conclusion With good biocompatibility to hBMSCs, pDBM could serve as ideal scaffold for bone tissue engineering both in vitro and in vivo.
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