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Chen R, Yu J, Gong HL, Jiang Y, Xue M, Xu N, Wei DX, Shi C. An easy long-acting BMP7 release system based on biopolymer nanoparticles for inducing osteogenic differentiation of adipose mesenchymal stem cells. J Tissue Eng Regen Med 2020; 14:964-972. [PMID: 32441466 DOI: 10.1002/term.3070] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Revised: 05/07/2020] [Accepted: 05/15/2020] [Indexed: 12/16/2022]
Abstract
In contrast to the early acting bone morphogenetic protein 2, bone morphogenetic protein 7 (BMP7) plays a decisive role mainly in the late stages of bone formation. To overcome deactivation and degradation of expensive BMP7, we designed a novel long-acting BMP7 release system based on poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P34HB) nanoparticles to enable the induction of osteogenic differentiation in human adipose mesenchymal stem cells (ADSCs). In order to improve the encapsulation efficiency of BMP7 and avoid damage by organic solvents, BMP7 was modified and protected using the biosurfactant soybean lecithin. In an in vitro test, BMP7-soybean lecithin-P34HB nanoparticles (BMP7-SPNPs) showed a short initial burst of BMP7 release during the first 24h, followed by a steady increase to a cumulative 80% release in 20days. Compared with the rapid release of control P34HB nanoparticles without soybean phospholipids loaded with BMP7 without soybean lecithin, BMP7-SPNPs significantly reduced the initial burst of BMP7 release and stabilized the content of BMP7 to allow long-term osteogenic differentiation during the late phase of bone development. Human ADSCs treated with BMP7-SPNPs showed higher alkaline phosphatase activity and higher expression levels of genetic markers of osteogenic differentiation compared with the control group. Thus, the results indicate that BMP7-SPNPs can be used as a rapid and long-acting BMP7 delivery system for osteogenic differentiation.
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Affiliation(s)
- Rui Chen
- Department of Orthopaedics, Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - Jiangming Yu
- Department of Orthopaedics, Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - Hai-Lun Gong
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, School of Medicine, Department of Life Sciences and Medicine, Northwest University, Xi'an, China
| | - Yuquan Jiang
- Department of Orthopaedics, Joint Logistic Support Force NO.925 Hospital of PLA, Guiyang, China
| | - Mintao Xue
- Department of Orthopaedics, Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - Ning Xu
- Department of Orthopaedics, Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - Dai-Xu Wei
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, School of Medicine, Department of Life Sciences and Medicine, Northwest University, Xi'an, China
| | - Changgui Shi
- Department of Orthopaedics, Changzheng Hospital, Second Military Medical University, Shanghai, China
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2
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Mai B, Jia M, Liu S, Sheng Z, Li M, Gao Y, Wang X, Liu Q, Wang P. Smart Hydrogel-Based DVDMS/bFGF Nanohybrids for Antibacterial Phototherapy with Multiple Damaging Sites and Accelerated Wound Healing. ACS APPLIED MATERIALS & INTERFACES 2020; 12:10156-10169. [PMID: 32027477 DOI: 10.1021/acsami.0c00298] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Burn infection is one of the commonest causes of death in severely burned patients. Developing multifunctional biological nanomaterials has a great significance for the comprehensive treatment of burn infection. In this paper, we developed a hydrogel-based nanodelivery system with antibacterial activity and skin regeneration function, which was used for photodynamic antimicrobial chemotherapy (PACT) in the treatment of burns. The treatment system is mainly composed of porphyrin photosensitizer sinoporphyrin sodium (DVDMS) and poly(lactic-co-glycolic acid) (PLGA)-encapsulated basic fibroblast growth factor (bFGF) nanospheres that are embedded in carboxymethyl chitosan (CMCS)-sodium alginate to form CSDP hybrid hydrogel. We systematically evaluated the inherent antibacterial performance, rheological properties, fluorescence imaging, and biocompatibility of the CSDP nanosystem. Under mild photoirradiation (30 J/cm2, 5 min), 10 μg/mL CSDP showed excellent antibacterial and anti-biofilm activities, which eradicated almost 99.99% of Staphylococcus aureus and multidrug-resistant (MDR) S. aureus in vitro. KEGG analysis identified that multiple signaling pathways were changed in MDR S. aureus after PACT. In the burn-infection model, CSDP-PACT successfully inhibited bacteria growth and concurrently promoted wound healing. Moreover, several regenerative factors were increased and some proinflammatory factors were reduced in the burn wounds of CSDP hydrogel treatment. These results suggest that the multifunctional CSDP hydrogel is a portable, light-triggered, antibacterial theranostic-platform and CSDP-PACT provides a promising strategy or the mechanically based synergistic treatment of burn infections.
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Affiliation(s)
- Bingjie Mai
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, National Engineering Laboratory for Resource Developing of Endangered Chinese Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Mengqi Jia
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, National Engineering Laboratory for Resource Developing of Endangered Chinese Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Shupei Liu
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, National Engineering Laboratory for Resource Developing of Endangered Chinese Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Zonghai Sheng
- Paul C. Lauterbur Research Center for Biomedical Imaging, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Min Li
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, National Engineering Laboratory for Resource Developing of Endangered Chinese Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Yiru Gao
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, National Engineering Laboratory for Resource Developing of Endangered Chinese Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Xiaobing Wang
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, National Engineering Laboratory for Resource Developing of Endangered Chinese Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Quanhong Liu
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, National Engineering Laboratory for Resource Developing of Endangered Chinese Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Pan Wang
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, National Engineering Laboratory for Resource Developing of Endangered Chinese Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
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3
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de Campos RP, Schultz IC, de Andrade Mello P, Davies S, Gasparin MS, Bertoni APS, Buffon A, Wink MR. Cervical cancer stem-like cells: systematic review and identification of reference genes for gene expression. Cell Biol Int 2018; 42:139-152. [PMID: 28949053 DOI: 10.1002/cbin.10878] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Accepted: 09/24/2017] [Indexed: 12/21/2022]
Abstract
Cervical cancer is the fourth most common cancer affecting women worldwide. Among many factors, the presence of cancer stem cells, a subpopulation of cells inside the tumor, has been associated with a worse prognosis. Considering the importance of gene expression studies to understand the biology of cervical cancer stem cells (CCSC), this work identifies stable reference genes for cervical cancer cell lines SiHa, HeLa, and ME180 as well as their respective cancer stem-like cells. A literature review was performed to identify validated reference genes currently used to normalize RT-qPCR data in cervical cancer cell lines. Then, cell lines were cultured in regular monolayer or in a condition that favors tumor sphere formation. RT-qPCR was performed using five reference genes: ACTB, B2M, GAPDH, HPRT1, and TBP. Stability was assessed to validate the selected genes as suitable reference genes. The evaluation validated B2M, GAPDH, HPRT1, and TBP in these experimental conditions. Among them, GAPDH and TBP presented the lowest variability according to the analysis by Normfinder, Bestkeeper, and ΔCq methods, being therefore the most adequate genes to normalize the combination of all samples. These results suggest that B2M, GAPDH, HPRT1, and TBP are suitable reference genes to normalize RT-qPCR data of established cervical cancer cell lines SiHa, HeLa, and ME180 as well as their derived cancer stem-like cells. Indeed, GAPDH and TBP seem to be the most convenient choices for studying gene expression in these cells in monolayers or spheres.
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Affiliation(s)
- Rafael P de Campos
- Laboratório de Biologia Celular, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre 90050-170, Rio Grande do Sul, Brazil
| | - Iago C Schultz
- Laboratório de Biologia Celular, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre 90050-170, Rio Grande do Sul, Brazil
| | - Paola de Andrade Mello
- Laboratório de Biologia Celular, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre 90050-170, Rio Grande do Sul, Brazil
- Laboratório de Análises Bioquímicas e Citológicas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 90610-000, Rio Grande do Sul, Brazil
| | - Samuel Davies
- Laboratório de Análises Bioquímicas e Citológicas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 90610-000, Rio Grande do Sul, Brazil
| | - Manuela S Gasparin
- Laboratório de Biologia Celular, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre 90050-170, Rio Grande do Sul, Brazil
- Laboratório de Análises Bioquímicas e Citológicas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 90610-000, Rio Grande do Sul, Brazil
| | - Ana P S Bertoni
- Laboratório de Biologia Celular, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre 90050-170, Rio Grande do Sul, Brazil
| | - Andréia Buffon
- Laboratório de Análises Bioquímicas e Citológicas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 90610-000, Rio Grande do Sul, Brazil
| | - Márcia R Wink
- Laboratório de Biologia Celular, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre 90050-170, Rio Grande do Sul, Brazil
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Ortega-Oller I, Del Castillo-Santaella T, Padial-Molina M, Galindo-Moreno P, Jódar-Reyes AB, Peula-García JM. Dual delivery nanosystem for biomolecules. Formulation, characterization, and in vitro release. Colloids Surf B Biointerfaces 2017; 159:586-595. [PMID: 28854415 DOI: 10.1016/j.colsurfb.2017.08.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 07/18/2017] [Accepted: 08/17/2017] [Indexed: 12/18/2022]
Abstract
Because of the biocompatible and biodegradable properties of poly (lactic-co-glycolic acid) (PLGA), nanoparticles (NPs) based on this polymer have been widely studied for drug/biomolecule delivery and long-term sustained-release. In this work, two different formulation methods for lysozyme-loaded PLGA NPs have been developed and optimized based on the double-emulsion (water/oil/water, W/O/W) solvent evaporation technique. They differ mainly in the phase in which the surfactant (Pluronic® F68) is added: water (W-F68) and oil (O-F68). The colloidal properties of these systems (morphology by SEM and STEM, hydrodynamic size by DLS and NTA, electrophoretic mobility, temporal stability in different media, protein encapsulation, release, and bioactivity) have been analyzed. The interaction surfactant-protein depending on the formulation procedure has been characterized by surface tension and dilatational rheology. Finally, cellular uptake by human mesenchymal stromal cells and cytotoxicity for both systems have been analyzed. Spherical hard NPs are made by the two methods However, in one case, they are monodisperse with diameters of around 120nm (O-F68), and in the other case, a polydisperse system of NPs with diameters between 100 and 500nm is found (W-F68). Protein encapsulation efficiency, release and bioactivity are maintained better by the W-F68 formulation method. This multimodal system is found to be a promising "dual delivery" system for encapsulating hydrophilic proteins with strong biological activity at the cell-surface and cytoplasmic levels.
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Affiliation(s)
| | | | - Miguel Padial-Molina
- Department of Oral Surgery and Implant Dentistry, University of Granada, Granada, Spain
| | - Pablo Galindo-Moreno
- Department of Oral Surgery and Implant Dentistry, University of Granada, Granada, Spain
| | - Ana Belén Jódar-Reyes
- Biocolloid and Fluid Physics Group, Department of Applied Physics, University of Granada, 18071 Granada, Spain
| | - José Manuel Peula-García
- Biocolloid and Fluid Physics Group, Department of Applied Physics, University of Granada, 18071 Granada, Spain; Department of Applied Physics II, University of Malaga, 29071 Malaga, Spain.
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5
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Park JS, Lim HJ, Yi SW, Park KH. Stem cell differentiation-related protein-loaded PLGA microspheres as a novel platform micro-typed scaffold for chondrogenesis. Biomed Mater 2016; 11:055003. [DOI: 10.1088/1748-6041/11/5/055003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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6
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Chu C, Deng J, Liu L, Cao Y, Wei X, Li J, Man Y. Nanoparticles combined with growth factors: recent progress and applications. RSC Adv 2016. [DOI: 10.1039/c6ra13636b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Increasing attention has been focused on the applications of nanoparticles combined with growth factors (NPs/GFs) due to the substantial functions of GFs in regenerative medicine and disease treatments.
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Affiliation(s)
- Chenyu Chu
- State Key Laboratory of Oral Diseases
- West China Hospital of Stomatology
- Sichuan University
- Chengdu 610041
- China
| | - Jia Deng
- State Key Laboratory of Oral Diseases
- West China Hospital of Stomatology
- Sichuan University
- Chengdu 610041
- China
| | - Li Liu
- State Key Laboratory of Biotherapy and Laboratory for Aging Research
- West China Hospital
- Sichuan University and Collaborative Innovation Center for Biotherapy
- Chengdu
- China
| | - Yubin Cao
- State Key Laboratory of Oral Diseases
- West China Hospital of Stomatology
- Sichuan University
- Chengdu 610041
- China
| | - Xiawei Wei
- State Key Laboratory of Biotherapy and Laboratory for Aging Research
- West China Hospital
- Sichuan University and Collaborative Innovation Center for Biotherapy
- Chengdu
- China
| | - Jidong Li
- Research Center for Nano Biomaterials
- Analytical & Testing Center
- Sichuan University
- Chengdu 610041
- P. R. China
| | - Yi Man
- State Key Laboratory of Oral Diseases
- West China Hospital of Stomatology
- Sichuan University
- Chengdu 610041
- China
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7
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Park JS, Yi SW, Kim HJ, Park KH. Receptor-mediated gene delivery into human mesenchymal stem cells using hyaluronic acid-shielded polyethylenimine/pDNA nanogels. Carbohydr Polym 2015; 136:791-802. [PMID: 26572414 DOI: 10.1016/j.carbpol.2015.09.053] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Revised: 08/12/2015] [Accepted: 09/17/2015] [Indexed: 01/23/2023]
Abstract
Polyethylenimine (PEI) has been used as a vehicle to deliver genes to cancer cells and somatic cells. In this study, cationic polymers of PEI were shielded with anionic polymers of hyaluronic acid (HA) to safely and effectively deliver genes into human mesenchymal stem cells (hMSCs). HA interacted with CD44 in the plasma membranes of hMSCs to facilitate the internalization of HA-shielded PEI/pDNA complexes. The HA-shielded PEI/pDNA nanogels were confirmed by size changes, ζ-potential, and gel retardation assays. HA-shielded nanogels were easily internalized by hMSCs, and this was reduced by pretreatment with a specific monoclonal antibody that blocked CD44. By shielding PEI/pDNA complexes with HA, nanogels were easily internalized to hMSCs when it did not blocked by anti-CD44. These shielded nanogels were also easily internalized by HeLa cells, and this was reduced by pretreatment with an anti-CD44 monoclonal antibody. Following internalization of the SOX9 gene, chondrogenesis of hMSCs was increased, as determined by RT-PCR, real-time quantitative PCR, and histological analyses.
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Affiliation(s)
- Ji Sun Park
- Department of Biomedical Science, College of Life Science, CHA University, 6F, CHA Bio-complex, 689 Sampyeong-dong Bundang-gu, Seongnam-si 463-400, Republic of Korea
| | - Se Won Yi
- Department of Biomedical Science, College of Life Science, CHA University, 6F, CHA Bio-complex, 689 Sampyeong-dong Bundang-gu, Seongnam-si 463-400, Republic of Korea
| | - Hye Jin Kim
- Department of Biomedical Science, College of Life Science, CHA University, 6F, CHA Bio-complex, 689 Sampyeong-dong Bundang-gu, Seongnam-si 463-400, Republic of Korea
| | - Keun-Hong Park
- Department of Biomedical Science, College of Life Science, CHA University, 6F, CHA Bio-complex, 689 Sampyeong-dong Bundang-gu, Seongnam-si 463-400, Republic of Korea.
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Zhu H, Yang F, Tang B, Li XM, Chu YN, Liu YL, Wang SG, Wu DC, Zhang Y. Mesenchymal stem cells attenuated PLGA-induced inflammatory responses by inhibiting host DC maturation and function. Biomaterials 2015; 53:688-98. [DOI: 10.1016/j.biomaterials.2015.03.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 02/27/2015] [Accepted: 03/04/2015] [Indexed: 12/29/2022]
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9
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Zhou Y, Zhu C, Wu YF, Zhang L, Tang JB. Effective modulation of transforming growth factor-β1 expression through engineered microRNA-based plasmid-loaded nanospheres. Cytotherapy 2015; 17:320-9. [DOI: 10.1016/j.jcyt.2014.09.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Revised: 09/09/2014] [Accepted: 09/13/2014] [Indexed: 11/26/2022]
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Fang Z, Zhu T, Shen WL, Tang QM, Chen JL, Yin Z, Ji JF, Heng BC, Ouyang HW, Chen X. Transplantation of fetal instead of adult fibroblasts reduces the probability of ectopic ossification during tendon repair. Tissue Eng Part A 2014; 20:1815-26. [PMID: 24410299 DOI: 10.1089/ten.tea.2013.0296] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Although cell transplantation therapy can effectively promote functional tendon repair, occasional ectopic ossification during tendon regeneration undermines its efficacy. The effect of transplanted cell types on ectopic ossification has not yet been systematically evaluated. This study compared the rate of ectopic ossification during tendon repair upon transplantation with mouse fetal fibroblasts (FFs) and their adult counterparts (adult fibroblasts [AFs]). Alkaline phosphatase (ALP) staining, immunofluorescence, and gene expression analysis were used to compare the spontaneous osteogenic differentiation of FFs and AFs in vitro. X-ray, histology, and gene expression analysis were used to investigate the ectopic ossification in a mouse Achilles tendon repair model in vivo. ALP staining and immunofluorescence data in vitro showed that FFs had less spontaneous osteogenic differentiation capacity, and lower expression of runt-related transcription factor 2 (runx2). For the in vivo study, the FFs transplant group displayed reduced ectopic ossification (2/7 vs. 7/7, Mann-Whitney test p<0.01) at 14 weeks post-transplantation and enhanced tendon repair (general histological score at week 6, 7.53 vs. 10.56, p<0.05). More chondrocytes formed at 6 weeks, and all mice developed bone marrow at 14 weeks post-transplantation in the AFs transplant group. Gene expression analysis of the regenerated tissue showed significantly higher expression levels of transforming growth factor beta1 (TGF-β1) and transforming growth factor beta3 (TGF-β3) in the AFs group during the early stages of tendon repair. Our study demonstrates that transplantation of fetal instead of AFs is more promising for tendon repair, underscoring the importance of the origin of seed cells for tendon repair.
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Affiliation(s)
- Zhi Fang
- 1 Zhejiang Provincial Key Laboratory of Tissue Engineering and Regenerative Medicine , Hangzhou, China
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Liang CZ, Li H, Tao YQ, Peng LH, Gao JQ, Wu JJ, Li FC, Hua JM, Chen QX. Dual release of dexamethasone and TGF-β3 from polymeric microspheres for stem cell matrix accumulation in a rat disc degeneration model. Acta Biomater 2013; 9:9423-33. [PMID: 23973308 DOI: 10.1016/j.actbio.2013.08.019] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Revised: 08/09/2013] [Accepted: 08/12/2013] [Indexed: 12/27/2022]
Abstract
Low back pain is frequently caused by nucleus pulposus (NP) degeneration. Tissue engineering is a powerful therapeutic strategy which could restore the normal biomechanical motion of the human spine. Previously we reported that a new nanostructured three-dimensional poly(lactide-co-glycolide) (PLGA) microsphere, which is loaded with dexamethasone and growth factor embedded heparin/poly(l-lysine) nanoparticles via a layer-by-layer system, was an effective cell carrier in vitro for NP tissue engineering. This study aimed to investigate whether the implantation of adipose-derived stem cell (ADSC)-seeded PLGA microspheres into the rat intervertebral disc could regenerate the degenerated disc. Changes in disc height by plain radiograph, T2-weighted signal intensity in magnetic resonance imaging (MRI), histology, immunohistochemistry and matrix-associated gene expression were evaluated in normal controls (NCs) (without operations), a degeneration control (DC) group (with needle puncture, injected only with Dulbecco's modified Eagle's medium), a PLGA microspheres (PMs) treatment group (with needle puncture, PLGA microspheres only injection), and PLGA microspheres loaded with ADSCs treatment (PMA) group (with needle puncture, PLGA microspheres loaded with ADSC injection) for a 24-week period. The results showed that at 24 weeks post-transplantation, the PM and PMA groups regained disc height values of ∼63% and 76% and MRI signal intensities of ∼47% and 76%, respectively, compared to the NC group. Biochemistry, immunohistochemistry and gene expression analysis also indicated the restoration of proteoglycan accumulation in the discs of the PM and PMA groups. However, there was almost no restoration of proteoglycan accumulation in the discs of the DC group compared with the PM and PMA groups. Taken together, these data suggest that ADSC-seeded PLGA microspheres could partly regenerate the degenerated disc in vivo after implantation into the rat degenerative intervertebral disc.
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Affiliation(s)
- Cheng-zhen Liang
- Department of Orthopedic Surgery, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, Zhejiang, People's Republic of China
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12
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Özcan I, Azizoğlu E, Senyiğit T, Özyazici M, Özer Ö. Comparison of PLGA and lecithin/chitosan nanoparticles for dermal targeting of betamethasone valerate. J Drug Target 2013; 21:542-50. [PMID: 23390922 DOI: 10.3109/1061186x.2013.769106] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Poly(lactide-co-glycolide) (PLGA) and lecithin/chitosan (LC) nanoparticles were prepared to evaluate the difference in the behavior upon administration on skin, for steroidal treatment. For this purpose, betamethasone-17-valerate (BMV)-loaded nanoparticles with a narrow size distribution and high entrapment efficiency were prepared. Permeation studies showed that both polymeric nanoparticles enhanced the amount of BMV in epidermis, which is the target site of topical steroidal treatment, when compared with commercial formulation. 1.58-Fold increase was determined in the epidermis concentration of BMV by LC nanoparticles with respect to PLGA nanoparticles. Nanoparticles were diluted in chitosan gel (10%, w/w) to prepare suitable formulation for topical application. Accumulation from both gel formulations were found significantly higher than commercial formulation in skin layers (p < 0.05). In addition, pharmacodynamic responses were also investigated as anti-inflammatory and skin-blanching parameters. Both formulations significantly improved these parameters although they contained 10 times less amount of BMV than commercial cream. Moreover, TEWL measurement exhibited no barrier function changes upon the application of nanoparticles on skin. Overall, both nanoparticles improved the localization of BMV within skin layers; but when compared with PLGA nanoparticles, the LC nanoparticles could be classified as a better candidate for topical delivery vehicle in the treatment of various dermatological inflammatory diseases.
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Affiliation(s)
- Ipek Özcan
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Ege University, Bornova, Izmir-Turkey
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