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Dalavi PA, Prabhu A, M S, Murugan SS, Jayachandran V. Casein-assisted exfoliation of tungsten disulfide nanosheets for biomedical applications. Colloids Surf B Biointerfaces 2023; 232:113595. [PMID: 37913705 DOI: 10.1016/j.colsurfb.2023.113595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 10/14/2023] [Accepted: 10/14/2023] [Indexed: 11/03/2023]
Abstract
Our regular life can be more challenging by bone abnormalities. Bone tissue engineering is used for repairing, regenerating, or replacing bone tissue that has been injured or infected. It is effective in overcoming the drawbacks of conventional bone grafting methods like autograft and allograft by enhancing the effectiveness of bone regeneration. Recent discoveries have shown that the exfoliation of transition metal dichalcogenides (TMDs) with protein is in great demand for bone tissue engineering applications. WS2 nanosheets were developed using casein and subsequently characterized with different analytical techniques. Strong absorption peaks were observed in the UV-visible spectra at 520 nm and 630 nm. Alginate and alginate-casein WS2 microspheres were developed. Stereomicroscopic images of the microspheres are spherical in shape and have an average diameter of around 0.8 ± 0.2 mm. The alginate-casein WS2 microspheres show higher content of water absorption and retention properties than only alginate-containing microspheres. The apatite formation in the simulated bodily fluid solution was facilitated more effectively by the alginate-casein-WS2 microspheres. Additionally, alginate-casein-WS2 microspheres have a compressive strength is 58.01 ± 4 MPa. Finally, in vitro cell interaction studies reveals that both the microspheres are biocompatible with the C3H10T1/2 cells, and alginate-casein-WS2-based microspheres promote cell growth more significantly. Alginate-casein-WS2 microspheres promote alkaline phosphatase activity, and mineralization process. Additionally, alginate-casein-WS2-based microspheres exponentially enhance the genes for ALP, BMP-2, OCN, and Collage type-1. The produced alginate-casein-WS2 microspheres could be a suitable synthetic graft for a bone transplant replacement.
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Affiliation(s)
- Pandurang Appana Dalavi
- Biomaterials Research Laboratory, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore 575018, India
| | - Ashwini Prabhu
- Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore 575018, India
| | - Sajida M
- Biomaterials Research Laboratory, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore 575018, India
| | - Sesha Subramanian Murugan
- Biomaterials Research Laboratory, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore 575018, India
| | - Venkatesan Jayachandran
- Biomaterials Research Laboratory, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore 575018, India.
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2
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Inchingolo AM, Patano A, Di Pede C, Inchingolo AD, Palmieri G, de Ruvo E, Campanelli M, Buongiorno S, Carpentiere V, Piras F, Settanni V, Viapiano F, Hazballa D, Rapone B, Mancini A, Di Venere D, Inchingolo F, Fatone MC, Palermo A, Minetti E, Lorusso F, Scarano A, Sauro S, Tartaglia GM, Bordea IR, Dipalma G, Malcangi G. Autologous Tooth Graft: Innovative Biomaterial for Bone Regeneration. Tooth Transformer® and the Role of Microbiota in Regenerative Dentistry. A Systematic Review. J Funct Biomater 2023; 14:jfb14030132. [PMID: 36976056 PMCID: PMC10058341 DOI: 10.3390/jfb14030132] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 02/24/2023] [Accepted: 02/25/2023] [Indexed: 03/05/2023] Open
Abstract
Different biomaterials, from synthetic products to autologous or heterologous grafts, have been suggested for the preservation and regeneration of bone. The aim of this study is to evaluate the effectiveness of autologous tooth as a grafting material and examine the properties of this material and its interactions with bone metabolism. PubMed, Scopus, Cochrane Library, and Web of Science were searched to find articles addressing our topic published from 1 January 2012 up to 22 November 2022, and a total of 1516 studies were identified. Eighteen papers in all were considered in this review for qualitative analysis. Demineralized dentin can be used as a graft material, since it shows high cell compatibility and promotes rapid bone regeneration by striking an ideal balance between bone resorption and production; it also has several benefits, such as quick recovery times, high-quality newly formed bone, low costs, no risk of disease transmission, the ability to be performed as an outpatient procedure, and no donor-related postoperative complications. Demineralization is a crucial step in the tooth treatment process, which includes cleaning, grinding, and demineralization. Since the presence of hydroxyapatite crystals prevents the release of growth factors, demineralization is essential for effective regenerative surgery. Even though the relationship between the bone system and dysbiosis has not yet been fully explored, this study highlights an association between bone and gut microbes. The creation of additional scientific studies to build upon and enhance the findings of this study should be a future objective of scientific research.
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Affiliation(s)
| | - Assunta Patano
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | - Chiara Di Pede
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | | | - Giulia Palmieri
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | - Elisabetta de Ruvo
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | - Merigrazia Campanelli
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | - Silvio Buongiorno
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | - Vincenzo Carpentiere
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | - Fabio Piras
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | - Vito Settanni
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | - Fabio Viapiano
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | - Denisa Hazballa
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | - Biagio Rapone
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | - Antonio Mancini
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | - Daniela Di Venere
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | - Francesco Inchingolo
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy
- Correspondence: (F.I.); (M.C.F.); Tel.: +39-331-211-1104 (F.I.); +39-3479914635 (M.C.F.)
| | - Maria Celeste Fatone
- PTA Trani-ASL BT, Viale Padre Pio, 76125 Trani, Italy
- Correspondence: (F.I.); (M.C.F.); Tel.: +39-331-211-1104 (F.I.); +39-3479914635 (M.C.F.)
| | - Andrea Palermo
- College of Medicine and Dentistry Birmingham, University of Birmingham, Birmingham B4 6BN, UK
| | - Elio Minetti
- Department of Biomedical, Surgical, and Dental Science, Università Degli Studi di Milano, 20122 Milan, Italy
| | - Felice Lorusso
- Department of Innovative Technologies in Medicine and Dentistry, University of Chieti-Pescara, 66100 Chieti, Italy
| | - Antonio Scarano
- Department of Innovative Technologies in Medicine and Dentistry, University of Chieti-Pescara, 66100 Chieti, Italy
| | - Salvatore Sauro
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy
- Dental Biomaterials and Minimally Invasive Dentistry, Department of Dentistry, Cardenal Herrera-CEU University, CEU Universities, C/Santiago Ramón y Cajal, s/n., Alfara del Patriarca, 46115 Valencia, Spain
| | - Gianluca Martino Tartaglia
- Department of Biomedical, Surgical and Dental Sciences, School of Dentistry, University of Milan, 20100 Milan, Italy
- UOC Maxillo-Facial Surgery and Dentistry Fondazione IRCCS Cà Granda, Ospedale Maggiore Policlinico, 20122 Milan, Italy
| | - Ioana Roxana Bordea
- Department of Oral Rehabilitation, Faculty of Dentistry, Iuliu Hațieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
| | - Gianna Dipalma
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | - Giuseppina Malcangi
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy
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Kishikawa N, El-Maghrabey M, Tsubokami A, Hori H, Kuroda N. Development of a Selective Assay of Tyrosine and Its Producing and Metabolizing Enzymes Utilizing Pulse-UV Irradiation-Induced Chemiluminescence. Anal Chem 2022; 94:11529-11537. [PMID: 35938883 DOI: 10.1021/acs.analchem.2c01593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new pulse UV irradiation-induced chemiluminescence (CL) determination method was developed for l-tyrosine using the luminol derivative L-012. The proposed method depends on the formation of reactive oxygen species (ROS) upon pulse UV irradiation of l-tyrosine; then, these ROS react with L-012 producing strong CL. The proposed method showed excellent sensitivity and ultraselectivity toward l-tyrosine. The mechanism of the developed CL method was studied using ROS scavengers, HPLC, and mass spectrometry. The method was linear for l-tyrosine in the range of 0.03-50 μM. Minor changes in the l-tyrosine structure, including hydroxylation, dehydroxylation, phosphorylation, or decarboxylation, were found to lead to a strong decrease in CL. Using the excellent selectivity of the proposed method for l-tyrosine, we have developed a CL assay for measuring alkaline phosphatase activity in the range of 0.02-15 U/L with the limit of detection (LOD) of 4 mU/L using the nonchemiluminescent O-phospho-l-tyrosine as a substrate. Furthermore, the CL reaction was applied for tyrosinase activity assay as this enzyme can convert l-tyrosine to the nonchemiluminescent l-dopa. The decrease in CL is correlated with the tyrosinase activity in the range of 0.025-0.75 U/mL with an LOD of 1.5 mU/mL. Moreover, the tyrosinase activity assay was successfully applied for the determination of IC50 of the tyrosinase inhibitors kojic acid and benzoic acid. Therefore, our novel pulse UV irradiation CL method for the determination of l-tyrosine was not only suitable for the determination of this vital amino acid but also extended to the successful determination of its producing and metabolizing enzymes and their inhibitors.
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Affiliation(s)
- Naoya Kishikawa
- Department of Analytical Chemistry for Pharmaceutics, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Mahmoud El-Maghrabey
- Department of Analytical Chemistry for Pharmaceutics, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan.,Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35116, Egypt
| | - Ayaka Tsubokami
- Department of Analytical Chemistry for Pharmaceutics, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Hiroki Hori
- School of Pharmaceutical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Naotaka Kuroda
- Department of Analytical Chemistry for Pharmaceutics, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
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4
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Wang HB, Tao BB, Wu NN, Zhang HD, Liu YM. Glutathione-stabilized copper nanoclusters mediated-inner filter effect for sensitive and selective determination of p-nitrophenol and alkaline phosphatase activity. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 271:120948. [PMID: 35104744 DOI: 10.1016/j.saa.2022.120948] [Citation(s) in RCA: 42] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 01/11/2022] [Accepted: 01/22/2022] [Indexed: 06/14/2023]
Abstract
A simple and highly selective fluorescence biosensor has been exploited for p-nitrophenol (p-NP) and alkaline phosphatase (ALP) activity detection based on the glutathione-stabilized copper nanoclusters (GSH-CuNCs) mediated-inner filter effect (IFE). The GSH-CuNCs were prepared by employing GSH as stabilizer and ascorbic acid (AA) as reductant. The obtained GSH-CuNCs exhibited a strong blue fluorescence emission at 420 nm with an excitation wavelength of 365 nm, which overlapped largely with the absorption spectra of p-nitrophenol (p-NP). Therefore, the luminescence of GSH-CuNCs could be quenched by p-NP through inner filter effect. In addition, ALP catalyzed the substrate p-nitrophenyl phosphate (p-NPP) to form p-nitrophenol (p-NP), which also leading to the fluorescence quenching of GSH-CuNCs. The fluorescent strategy was realized for the sensitive determination of p-NP and ALP activity with the promising limit of detection of 20 nM (for p-NP) and 0.003 mU⋅mL-1 (for ALP). Furthermore, the method could be applied to detect the p-NP content in river water samples and ALP activity in human serum samples.
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Affiliation(s)
- Hai-Bo Wang
- College of Chemistry and Chemical Engineering, Institute for Conservation and Utilization of Agro-bioresources in Dabie Mountains, Xinyang Key Laboratory of Functional Nanomaterials for Bioanalysis, Xinyang Normal University, Xinyang 464000, China.
| | - Bei-Bei Tao
- College of Chemistry and Chemical Engineering, Institute for Conservation and Utilization of Agro-bioresources in Dabie Mountains, Xinyang Key Laboratory of Functional Nanomaterials for Bioanalysis, Xinyang Normal University, Xinyang 464000, China
| | - Ning-Ning Wu
- College of Chemistry and Chemical Engineering, Institute for Conservation and Utilization of Agro-bioresources in Dabie Mountains, Xinyang Key Laboratory of Functional Nanomaterials for Bioanalysis, Xinyang Normal University, Xinyang 464000, China
| | - Hong-Ding Zhang
- College of Chemistry and Chemical Engineering, Institute for Conservation and Utilization of Agro-bioresources in Dabie Mountains, Xinyang Key Laboratory of Functional Nanomaterials for Bioanalysis, Xinyang Normal University, Xinyang 464000, China
| | - Yan-Ming Liu
- College of Chemistry and Chemical Engineering, Institute for Conservation and Utilization of Agro-bioresources in Dabie Mountains, Xinyang Key Laboratory of Functional Nanomaterials for Bioanalysis, Xinyang Normal University, Xinyang 464000, China
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5
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Jagga S, Sharma AR, Lee YH, Nam JS, Lee SS. Sclerostin-Mediated Impaired Osteogenesis by Fibroblast-Like Synoviocytes in the Particle-Induced Osteolysis Model. Front Mol Biosci 2021; 8:666295. [PMID: 34250013 PMCID: PMC8260695 DOI: 10.3389/fmolb.2021.666295] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Accepted: 05/20/2021] [Indexed: 01/02/2023] Open
Abstract
Engineered biomaterials are envisioned to replace, augment, or interact with living tissues for improving the functional deformities associated with end-stage joint pathologies. Unfortunately, wear debris from implant interfaces is the major factor leading to periprosthetic osteolysis. Fibroblast-like synoviocytes (FLSs) populate the intimal lining of the synovium and are in direct contact with wear debris. This study aimed to elucidate the effect of Ti particles as wear debris on human FLSs and the mechanism by which they might participate in the bone remodeling process during periprosthetic osteolysis. FLSs were isolated from synovial tissue from patients, and the condition medium (CM) was collected after treating FLSs with sterilized Ti particles. The effect of CM was analyzed for the induction of osteoclastogenesis or any effect on osteogenesis and signaling pathways. The results demonstrated that Ti particles could induce activation of the NFκB signaling pathway and induction of COX-2 and inflammatory cytokines in FLSs. The amount of Rankl in the conditioned medium collected from Ti particle–stimulated FLSs (Ti CM) showed the ability to stimulate osteoclast formation. The Ti CM also suppressed the osteogenic initial and terminal differentiation markers for osteoprogenitors, such as alkaline phosphate activity, matrix mineralization, collagen synthesis, and expression levels of Osterix, Runx2, collagen 1α, and bone sialoprotein. Inhibition of the WNT and BMP signaling pathways was observed in osteoprogenitors after the treatment with the Ti CM. In the presence of the Ti CM, exogenous stimulation by WNT and BMP signaling pathways failed to stimulate osteogenic activity in osteoprogenitors. Induced expression of sclerostin (SOST: an antagonist of WNT and BMP signaling) in Ti particle–treated FLSs and secretion of SOST in the Ti CM were detected. Neutralization of SOST in the Ti CM partially restored the suppressed WNT and BMP signaling activity as well as the osteogenic activity in osteoprogenitors. Our results reveal that wear debris–stimulated FLSs might affect bone loss by not only stimulating osteoclastogenesis but also suppressing the bone-forming ability of osteoprogenitors. In the clinical setting, targeting FLSs for the secretion of antagonists like SOST might be a novel therapeutic approach for preventing bone loss during inflammatory osteolysis.
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Affiliation(s)
- Supriya Jagga
- Institute for Skeletal Aging and Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Chuncheon, South Korea
| | - Ashish Ranjan Sharma
- Institute for Skeletal Aging and Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Chuncheon, South Korea
| | - Yeon Hee Lee
- Institute for Skeletal Aging and Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Chuncheon, South Korea
| | - Ju-Suk Nam
- Institute for Skeletal Aging and Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Chuncheon, South Korea
| | - Sang-Soo Lee
- Institute for Skeletal Aging and Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Chuncheon, South Korea
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6
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Fan Y, Lv M, Xue Y, Li J, Wang E. In Situ Fluorogenic Reaction Generated via Ascorbic Acid for the Construction of Universal Sensing Platform. Anal Chem 2021; 93:6873-6880. [PMID: 33899464 DOI: 10.1021/acs.analchem.1c00967] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A highly fluorescent emission reaction between terephthalic acid (PTA) and ascorbic acid (AA) via simple control of the reaction temperature was first revealed with the detailed formation mechanism and various characterizations including electron paramagnetic resonance and mass spectrometry. Based on the AA-responsive emission, the alkaline phosphatase (ALP) triggered the transformation of l-ascorbic acid 2-phosphate trisodium salt to AA was integrated with the present system for developing a sensitive, selective, and universal platform. The monitoring of the activity of ALP and the fabrication of ALP-based enzyme-linked immunoassay (ELISA) with carcinoembryonic antigen (CEA) as the model target was performed. The fluorescence intensity correlated well to the CEA concentration in the ranges of 0.25-30 ng/mL, with a detection limit of 0.08 ng/mL. Such a facile protocol based on the fluorescent reaction between PTA and AA without the assistance of catalysis of nanomaterials avoided the laborious synthesis procedure and provided a direct strategy for the early clinical diagnosis coupled with ALP-related catalysis.
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Affiliation(s)
- Yongchao Fan
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China.,University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Mengmeng Lv
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
| | - Yuan Xue
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China.,University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Jing Li
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China.,University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Erkang Wang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China.,University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
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7
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Gross T, Jeney C, Halm D, Finkenzeller G, Stark GB, Zengerle R, Koltay P, Zimmermann S. Characterization of CRISPR/Cas9 RANKL knockout mesenchymal stem cell clones based on single-cell printing technology and Emulsion Coupling assay as a low-cellularity workflow for single-cell cloning. PLoS One 2021; 16:e0238330. [PMID: 33661950 PMCID: PMC7932140 DOI: 10.1371/journal.pone.0238330] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 02/04/2021] [Indexed: 12/03/2022] Open
Abstract
The homogeneity of the genetically modified single-cells is a necessity for many applications such as cell line development, gene therapy, and tissue engineering and in particular for regenerative medical applications. The lack of tools to effectively isolate and characterize CRISPR/Cas9 engineered cells is considered as a significant bottleneck in these applications. Especially the incompatibility of protein detection technologies to confirm protein expression changes without a preconditional large-scale clonal expansion creates a gridlock in many applications. To ameliorate the characterization of engineered cells, we propose an improved workflow, including single-cell printing/isolation technology based on fluorescent properties with high yield, a genomic edit screen (Surveyor assay), mRNA RT-PCR assessing altered gene expression, and a versatile protein detection tool called emulsion-coupling to deliver a high-content, unified single-cell workflow. The workflow was exemplified by engineering and functionally validating RANKL knockout immortalized mesenchymal stem cells showing bone formation capacity of these cells. The resulting workflow is economical, without the requirement of large-scale clonal expansions of the cells with overall cloning efficiency above 30% of CRISPR/Cas9 edited cells. Nevertheless, as the single-cell clones are comprehensively characterized at an early, highly parallel phase of the development of cells including DNA, RNA, and protein levels, the workflow delivers a higher number of successfully edited cells for further characterization, lowering the chance of late failures in the development process.
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Affiliation(s)
- Tobias Gross
- Laboratory for MEMS Applications, IMTEK - Department of Microsystems Engineering, University of Freiburg, Freiburg, Germany
- * E-mail:
| | - Csaba Jeney
- Laboratory for MEMS Applications, IMTEK - Department of Microsystems Engineering, University of Freiburg, Freiburg, Germany
| | - Darius Halm
- Department of Plastic and Hand Surgery, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Günter Finkenzeller
- Department of Plastic and Hand Surgery, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - G. Björn Stark
- Department of Plastic and Hand Surgery, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Roland Zengerle
- Laboratory for MEMS Applications, IMTEK - Department of Microsystems Engineering, University of Freiburg, Freiburg, Germany
- Hahn-Schickard, Freiburg, Germany
| | - Peter Koltay
- Laboratory for MEMS Applications, IMTEK - Department of Microsystems Engineering, University of Freiburg, Freiburg, Germany
- Hahn-Schickard, Freiburg, Germany
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT), Freiburg, Germany
| | - Stefan Zimmermann
- Laboratory for MEMS Applications, IMTEK - Department of Microsystems Engineering, University of Freiburg, Freiburg, Germany
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8
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Zuo Q, Chen Y, Chen ZP, Yu RQ. A novel ratiometric fluorescent sensing method based on MnO 2 nanosheet for sensitive detection of alkaline phosphatase in serum. Talanta 2020; 209:120528. [PMID: 31892000 DOI: 10.1016/j.talanta.2019.120528] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 10/16/2019] [Accepted: 10/29/2019] [Indexed: 12/27/2022]
Abstract
Alkaline phosphatase (ALP) is an important biomarker for clinical diagnosis. Abnormal levels of ALP are closely related to many diseases. In this contribution, a ratiometric fluorescent sensing method based on the competition between two oxidation-reduction reactions related to MnO2 nanosheets was developed for ALP detection. Moreover, an advanced model was derived for the quantitative analysis of the fluorescence measurements obtained by the proposed ratiometric fluorescent sensing method. With the aid of the advanced model, the proposed method achieved satisfactory quantitative results for ALP in real-world serum samples, with accuracy comparable to the corresponding results obtained by an automatic biochemical analyzer. Its recovery rates for the spiked serum samples were in the range of 98.4-115.0%, which were quite satisfactory considering the complexity of the matrices of the samples. The limit of detection and limit of quantification were estimated to be 0.09 and 0.30 U L-1, respectively. Therefore, it is reasonable to expect that the proposed ratiometric fluorescent sensing method can be further developed to be a competitive alternative for ALP detection.
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Affiliation(s)
- Qi Zuo
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan, 410082, PR China
| | - Yao Chen
- Hunan Key Lab of Biomedical Materials and Devices, College of Life Sciences and Chemistry, Hunan University of Technology, Zhuzhou, 412008, PR China.
| | - Zeng-Ping Chen
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan, 410082, PR China.
| | - Ru-Qin Yu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan, 410082, PR China
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9
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Peng C, Xing H, Xue Y, Wang J, Li J, Wang E. Ratiometric sensing of alkaline phosphatase based on the catalytical activity from Mn-Fe layered double hydroxide nanosheets. NANOSCALE 2020; 12:2022-2027. [PMID: 31912851 DOI: 10.1039/c9nr08769a] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Two-dimensional (2D) Mn-Fe layered double hydroxide (LDH) nanosheets are firstly examined to mediate an O-phenylenediamine (OPD) based fluorescent switch in the presence of ascorbic acid (AA). On one hand, Mn-Fe LDH mimicked the functions of oxidase to catalyze the oxidation of OPD to OPDox, emitting fluorescence at 565 nm. On the other hand, Mn-Fe LDH acts as a superior catalyst for the reaction between AA and OPD to generate 3-(1,2-dihydroxyethyl)furo[3,4-b]quinoxalin-1(3H)-one (N-heterocyclic compound) with an emergence of the maximum emission at 425 nm (ca. 6 fold). The presence of AA not only induces the enhanced emission at 425 nm from the N-heterocyclic compound, but also leads to decreased fluorescence at 565 nm due to the decomposition of Mn-Fe LDH nanosheets. On the basis of the reversed fluorescence response at 425 and 565 nm, ratiometric fluorescence sensing methods (ΔF425 nm/ΔF565 nm) are developed for the determination of AA. With the assistance of alkaline phosphatase (ALP), the activity of ALP can be monitored using the ratiometric platform based on the hydrolyzing ascorbic acid 2-phosphate to yield AA with the detection limit of 0.16 mU mL-1. Different from the traditional ratiometric sensing platform, where two fluorescent probes are often introduced, the present ratiometric system derived from one signal precursor holds great potential in developing a facile platform and broadens the application of 2D nanomaterials in the field of biology.
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Affiliation(s)
- Chao Peng
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China.
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10
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Kaempferol stimulates WNT/β-catenin signaling pathway to induce differentiation of osteoblasts. J Nutr Biochem 2019; 74:108228. [DOI: 10.1016/j.jnutbio.2019.108228] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 07/31/2019] [Accepted: 08/14/2019] [Indexed: 11/23/2022]
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11
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Chen C, Zhao D, Jiang Y, Ni P, Zhang C, Wang B, Yang F, Lu Y, Sun J. Logically Regulating Peroxidase-Like Activity of Gold Nanoclusters for Sensing Phosphate-Containing Metabolites and Alkaline Phosphatase Activity. Anal Chem 2019; 91:15017-15024. [DOI: 10.1021/acs.analchem.9b03629] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Chuanxia Chen
- School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China
| | - Dan Zhao
- School of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang, Henan 471023, China
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
| | - Yuanyuan Jiang
- School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China
| | - Pengjuan Ni
- School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China
| | - Chenghui Zhang
- School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China
| | - Bo Wang
- School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China
| | - Fan Yang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
| | - Yizhong Lu
- School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China
| | - Jian Sun
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
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12
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Jie Zhang, Qi G, Xu C, Jin Y. Enzymatic Preparation of Plasmonic-Fluorescent Quantum Dot-Gold Hybrid Nanoprobes for Sensitive Detection of Glucose and Alkaline Phosphatase and Dual-Modality Cell Imaging. Anal Chem 2019; 91:14074-14079. [DOI: 10.1021/acs.analchem.9b03818] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Jie Zhang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
| | - Guohua Qi
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Chen Xu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
- University of Science and Technology of China, Hefei 230026, P. R. China
| | - Yongdong Jin
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
- University of Science and Technology of China, Hefei 230026, P. R. China
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13
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Wehrle M, Koch F, Zimmermann S, Koltay P, Zengerle R, Stark GB, Strassburg S, Finkenzeller G. Examination of Hydrogels and Mesenchymal Stem Cell Sources for Bioprinting of Artificial Osteogenic Tissues. Cell Mol Bioeng 2019. [DOI: 10.1007/s12195-019-00588-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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14
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Cai M, Ding C, Wang F, Ye M, Zhang C, Xian Y. A ratiometric fluorescent assay for the detection and bioimaging of alkaline phosphatase based on near infrared Ag 2S quantum dots and calcein. Biosens Bioelectron 2019; 137:148-153. [PMID: 31100597 DOI: 10.1016/j.bios.2019.04.057] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Revised: 04/03/2019] [Accepted: 04/29/2019] [Indexed: 12/13/2022]
Abstract
Herein, a ratiometric fluorescent method was developed for alkaline phosphatase (ALP) detection based on near-infrared (NIR) Ag2S quantum dots (QDs) and calcein through the competitive approach. The system based on Ag2S QDs and calcein shows green (maximum emission at 512 nm from calcein) and near infrared (NIR) fluorescence (maximum 798 nm from Ag2S QDs) under the same excitation wavelength (468 nm). In the presence of Ce3+, the fluorescence intensity of calcein is decreased due to static quenching, while the fluorescence intensity of Ag2S QDs is enhanced through aggregation induced emission (AIE). The p-nitrophenyl phosphate is hydrolyzed by ALP, and the yield phosphate ions bind with Ce3+ with higher affinity than these of Ag2S QDs and calcein. Therefore, the green fluorescence from calcein is recovered while NIR fluorescence from Ag2S QDs is decreased. On the basis of these findings, a ratiometric fluorescence assay was developed for the measurement of ALP activity. The ratio of fluorescence intensity at 512 and 798 nm (F512/F798) was well associated with the ALP concentration ranging from 2 to 100 mU/mL with the detection limit of 1.28 mU/mL. The method was successfully applied for detecting ALP in human serum with an acceptable recovery and bioimaging intracellular ALP with good performance. In addition, the approach was also employed for the screening ALP inhibitor.
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Affiliation(s)
- Meifang Cai
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China
| | - Caiping Ding
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China
| | - Fangfang Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China
| | - Mingqiang Ye
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China
| | - Cuiling Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China.
| | - Yuezhong Xian
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China.
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15
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Chen C, Yuan Q, Ni P, Jiang Y, Zhao Z, Lu Y. Fluorescence assay for alkaline phosphatase based on ATP hydrolysis-triggered dissociation of cerium coordination polymer nanoparticles. Analyst 2019; 143:3821-3828. [PMID: 30010688 DOI: 10.1039/c8an00787j] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Alkaline phosphatase (ALP) is a significant biomarker for diagnostics. Simple, selective and sensitive detection of ALP activity is thus of critical importance. In this study, an artful fluorescence assay for ALP is proposed based on adenosine triphosphate (ATP) hydrolysis-triggered disassociation and fluorescence quenching of cerium coordination polymer nanoparticles (CPNs). ATP, a recognized natural substrate of phosphatase, can serve as a superb "antenna" to sensitize the luminescence of Ce3+ with the aid of tris(hydroxymethyl) aminomethane (Tris), forming Ce3+-ATP-Tris CPNs. In the presence of ALP, ATP will be catalytically converted into adenosine and inorganic orthophosphate, however neither of them can sensitize Ce3+ in alkaline media. As a result, the obtained CPNs are disassociated, inducing the quenching of the fluorescence. On this basis, a straightforward fluorescence assay for ALP activity is rationally developed. The fluorescence quenching efficiency shows a linear relationship for ALP within the activity range from 0.1 to 10 mU mL-1 with a detection limit of 0.09 mU mL-1 under the optimal experimental conditions. Moreover, this facile yet effective fluorescence method featured simplicity, cost-effectiveness, high sensitivity and high selectivity and can be successfully utilized for the quantitative detection of ALP in human serum samples.
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Affiliation(s)
- Chuanxia Chen
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, China.
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16
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Ma F, Liu M, Zhang CY. Ligase amplification reaction-catalyzed assembly of a single quantum dot-based nanosensor for sensitive detection of alkaline phosphatase. Chem Commun (Camb) 2019; 55:8963-8966. [DOI: 10.1039/c9cc04369a] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We demonstrate the ligase amplification reaction-catalyzed assembly of a single quantum dot-based nanosensor for sensitive detection of alkaline phosphatase.
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Affiliation(s)
- Fei Ma
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
| | - Meng Liu
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
| | - Chun-yang Zhang
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
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17
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Wang LJ, Wang ZY, Zhang CY. Primer dephosphorylation-initiated circular exponential amplification for ultrasensitive detection of alkaline phosphatase. Analyst 2018; 143:4606-4613. [PMID: 30191935 DOI: 10.1039/c8an01647j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Alkaline phosphatase (ALP) is an important diagnostic indicator for various human diseases including bone diseases, liver dysfunction, diabetes, breast and prostatic cancers. However, the conventional methods for ALP assay are usually cumbersome and time-consuming with low sensitivity. Here, we develop a new fluorescent method for ultrasensitive detection of ALP activity on the basis of primer dephosphorylation-initiated isothermal circular exponential amplification. We design two dual-functional hairpin probes (HP1 and HP2), which function as both the templates for exponential amplification reaction (EXPAR) and the generators for signal output. In the presence of ALP, the 3'-phosphorylated primer is dephosphorylated and subsequently hybridizes with the 3' protruding end of HP1 to initiate the first strand displacement amplification (SDA), producing trigger 1 and fluorescence signal. The released trigger 1 is complementary to the 3' protruding end of HP2 for the initiation of the second SDA, producing trigger 2 and fluorescence signal. Notably, trigger 2 is complementary to the 3' protruding end of HP1 and may subsequently initiate two consecutive SDAs, enabling circular EXPAR to generate an amplified fluorescence signal. This method exhibits high sensitivity with a detection limit of 2.0 × 10-10 U μL-1 and a large dynamic range of 5 orders of magnitude from 1.0 × 10-9 to 1.0 × 10-4 U μL-1, and it can measure ALP at the single-cell level. Importantly, this method can be applied for the measurement of kinetic parameters and the screening of potential inhibitors, providing a powerful tool for ALP-related biomedical research and clinical diagnosis.
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Affiliation(s)
- Li-Juan Wang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, China.
| | - Zi-Yue Wang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, China.
| | - Chun-Yang Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, China.
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18
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Bono N, Tarsini P, Candiani G. BMP-2 and type I collagen preservation in human deciduous teeth after demineralization. J Appl Biomater Funct Mater 2018; 17:2280800018784230. [PMID: 30045659 DOI: 10.1177/2280800018784230] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Great interest has recently been focused on tooth and tooth derivatives as suitable substrates for the treatment of alveolar bone defects. Here, we propose the use of demineralized baby teeth (BT) as potential grafting materials for bone augmentation procedures. METHODS Particles of human BT (Ø < 1 mm) were demineralized by means of a chemical/thermal treatment. Demineralized BT particles were thoroughly characterized by scanning electron microscopy/energy dispersive X-ray analyses to evaluate the effects of the demineralization on BT topography and mineral phase composition, and by enzyme-linked immunosorbent assays (ELISA) to quantify collagen and bone morphogenetic protein-2 (BMP-2) protein contents. The response of SAOS-2 cells to exogenous BMP-2 stimulation was evaluated to identify the minimum BMP-2 concentration able to induce osteodifferentiation in vitro (alkaline phosphatase (ALP) activity). RESULTS The demineralization treatment led to a dramatic decrease in relative Ca and P content (%) of ≈75% with respect to the native BT particles, while preserving native protein conformation and activity. Interestingly, the demineralization process led to a rise in the bioavailability of BMP-2 in BT particles, as compared to the untreated counterparts. The BMP-2 content found in demineralized BT was also proved to be very effective in enhancing ALP activity, thus in the osteodifferentiation of SAOS-2 cells in vitro, as confirmed by cell experiments performed upon exogenously added BMP-2. CONCLUSIONS In this study we demonstrate that the BMP-2 content found in demineralized BT is very effective in inducing cell osteodifferentiation, and strengthens the idea that BTs are very attractive bioactive materials for bone-grafting procedures.
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Affiliation(s)
- Nina Bono
- 1 Politecnico di Milano Research Unit, National Interuniversity Consortium of Materials Science and Technology - INSTM, Milan, Italy
| | - Paolo Tarsini
- 2 Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Milan, Italy
| | - Gabriele Candiani
- 1 Politecnico di Milano Research Unit, National Interuniversity Consortium of Materials Science and Technology - INSTM, Milan, Italy.,2 Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Milan, Italy
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19
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Chen C, Zhao J, Lu Y, Sun J, Yang X. Fluorescence Immunoassay Based on the Phosphate-Triggered Fluorescence Turn-on Detection of Alkaline Phosphatase. Anal Chem 2018; 90:3505-3511. [DOI: 10.1021/acs.analchem.7b05325] [Citation(s) in RCA: 109] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Chuanxia Chen
- School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
| | - Jiahui Zhao
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yizhong Lu
- School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China
| | - Jian Sun
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
| | - Xiurong Yang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
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20
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HUANG H, WANG B, CHEN M, ZHANG W, LI Y, LIU Z. A Graphene Quantum Dots-Enzyme Hybrid System for the Fluorescence Assay of Alkaline Phosphatase Activity and Inhibitor Screening. ANAL SCI 2018; 34:131-136. [DOI: 10.2116/analsci.34.131] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Hui HUANG
- College of Food Science and Engineering, Jilin University
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University
| | - Bingdi WANG
- College of Food Science and Engineering, Jilin University
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University
| | - Meng CHEN
- College of Food Science and Engineering, Jilin University
| | - Wenjing ZHANG
- College of Food Science and Engineering, Jilin University
| | - Yongxin LI
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences
| | - Zhenning LIU
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University
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21
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Nam JS, Sharma AR, Jagga S, Lee DH, Sharma G, Nguyen LT, Lee YH, Chang JD, Chakraborty C, Lee SS. Suppression of osteogenic activity by regulation of WNT and BMP signaling during titanium particle induced osteolysis. J Biomed Mater Res A 2017; 105:912-926. [PMID: 28076890 DOI: 10.1002/jbm.a.36004] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Revised: 11/25/2016] [Accepted: 01/06/2017] [Indexed: 12/12/2022]
Abstract
Periprosthetic osteolysis remains the leading obstacle for total joint replacements. Primarily, it was thought that aseptic loosening is mainly caused by macrophage mediated inflammatory process arising from production of wear debris. The role of osteoclasts and its sequential bone resorption ability has been extensively studied, but little is known about impaired osteogenesis during osteolysis. In the current study, we have tried to delineate the regulatory mechanism of osteogenic signals by Ti particles in osteoprogenitor cells as well its participatory role in wear debris induced osteolysis. Implantation of Ti particles on mice calvaria induced pro-inflammatory response, elevated expression of COX2 and reduced the expression of Osterix. Treatment of Ti particles to MC3T3 E-1 cells displayed decreased osteogenic activity including ALP activity, mineralization and mRNA levels several osteogenic genes. Moreover, the basal activity of WNT and BMP signaling pathways was suppressed in MC3T3 E-1 cells treated with Ti particles. As an early response to Ti particles, MC3T3 E-1 cells showed activation of ERK and JNK. Co-inhibition of ERK and JNK with their specific inhibitors resulted in partial recovery of WNT and BMP signaling activity as well as ALP activity and collagen synthesis. Finally, LiCl mediated activation of WNT signaling pathway demonstrated rescue of Ti particle facilitated suppression of Osterix expression in mice calvaria. Our results provide evidences that WNT signaling pathway is regulated by ERK, JNK, and BMP signaling pathway during wear debris induced inflammatory osteolysis and may be considered as suitable therapeutic targets for the treatment. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 912-926, 2017.
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Affiliation(s)
- Ju-Suk Nam
- Institute for Skeletal Aging & Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Chuncheon, 24252, Republic of Korea
| | - Ashish Ranjan Sharma
- Institute for Skeletal Aging & Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Chuncheon, 24252, Republic of Korea
| | - Supriya Jagga
- Institute for Skeletal Aging & Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Chuncheon, 24252, Republic of Korea
| | - Dong-Hyun Lee
- Institute for Skeletal Aging & Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Chuncheon, 24252, Republic of Korea
| | - Garima Sharma
- Institute for Skeletal Aging & Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Chuncheon, 24252, Republic of Korea
| | - Lich Thi Nguyen
- Institute for Skeletal Aging & Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Chuncheon, 24252, Republic of Korea
| | - Yeon Hee Lee
- Institute for Skeletal Aging & Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Chuncheon, 24252, Republic of Korea
| | - Jun-Dong Chang
- Institute for Skeletal Aging & Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Chuncheon, 24252, Republic of Korea
| | - Chiranjib Chakraborty
- Institute for Skeletal Aging & Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Chuncheon, 24252, Republic of Korea.,Department of Bio-informatics, School of Computer and Information Sciences, Galgotias University, Greater Noida, 203201, India
| | - Sang-Soo Lee
- Institute for Skeletal Aging & Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Chuncheon, 24252, Republic of Korea
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22
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Benning L, Gutzweiler L, Tröndle K, Riba J, Zengerle R, Koltay P, Zimmermann S, Stark GB, Finkenzeller G. Cytocompatibility testing of hydrogels toward bioprinting of mesenchymal stem cells. J Biomed Mater Res A 2017; 105:3231-3241. [DOI: 10.1002/jbm.a.36179] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 07/07/2017] [Accepted: 07/28/2017] [Indexed: 01/09/2023]
Affiliation(s)
- Leo Benning
- Department of Plastic and Hand Surgery; Faculty of Medicine, Medical Center-University of Freiburg, Freiburg; Germany
| | - Ludwig Gutzweiler
- Laboratory for MEMS Applications, IMTEK-Department of Microsystems Engineering; University of Freiburg, Georges-Koehler-Allee 103; Freiburg 79110 Germany
- Hahn-Schickard, Georges-Koehler-Allee 103; Freiburg 79110 Germany
| | - Kevin Tröndle
- Laboratory for MEMS Applications, IMTEK-Department of Microsystems Engineering; University of Freiburg, Georges-Koehler-Allee 103; Freiburg 79110 Germany
| | - Julian Riba
- Laboratory for MEMS Applications, IMTEK-Department of Microsystems Engineering; University of Freiburg, Georges-Koehler-Allee 103; Freiburg 79110 Germany
| | - Roland Zengerle
- Laboratory for MEMS Applications, IMTEK-Department of Microsystems Engineering; University of Freiburg, Georges-Koehler-Allee 103; Freiburg 79110 Germany
- Hahn-Schickard, Georges-Koehler-Allee 103; Freiburg 79110 Germany
- FIT-Freiburg Centre for Interactive Materials and Bioinspired Technologies; University of Freiburg, Georges-Koehler-Allee 105; Freiburg 79110 Germany
| | - Peter Koltay
- Laboratory for MEMS Applications, IMTEK-Department of Microsystems Engineering; University of Freiburg, Georges-Koehler-Allee 103; Freiburg 79110 Germany
| | - Stefan Zimmermann
- Laboratory for MEMS Applications, IMTEK-Department of Microsystems Engineering; University of Freiburg, Georges-Koehler-Allee 103; Freiburg 79110 Germany
| | - G. Björn Stark
- Department of Plastic and Hand Surgery; Faculty of Medicine, Medical Center-University of Freiburg, Freiburg; Germany
| | - Günter Finkenzeller
- Department of Plastic and Hand Surgery; Faculty of Medicine, Medical Center-University of Freiburg, Freiburg; Germany
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23
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Olthof MGL, Kempen DHR, Herrick JL, Yaszemski MJ, Dhert WJA, Lu L. Effect of different sustained bone morphogenetic protein-2 release kinetics on bone formation in poly(propylene fumarate) scaffolds. J Biomed Mater Res B Appl Biomater 2017; 106:477-487. [PMID: 28186684 DOI: 10.1002/jbm.b.33866] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 01/03/2017] [Accepted: 01/26/2017] [Indexed: 11/08/2022]
Abstract
To investigate the effect of sustained bone morphogenetic protein-2 (BMP-2) release kinetics on bone formation in poly(propylene fumarate) (PPF) scaffolds, different poly(lactic-co-glycolic acid) (PLGA) microspheres were used as delivery vehicles. All PPF scaffolds had the same 75% porous structure, while the degradation rate of the embedded PLGA microspheres was changed to tailor BMP-2 release by varying the lactic-to-glycolic acid (L:G) ratio in the copolymer. Four PLGA microsphere formulations with 50/50, 65/35, 75/25, and 85/15 L:G ratios and varying in vivo degradation rates were fabricated. The in vitro and in vivo BMP-2 release kinetics were determined by analyzing radiolabeled 125 I-BMP-2. Biological activity of released BMP-2 was tested using a W20-17 cell culture model in vitro and a subcutaneous rat model in vivo. Corresponding outcome parameters were defined as capacity to increase the in vitro AP activity in weekly consecutive cell cultures over 14 weeks and the in vivo bone formation after 7 and 14 weeks. The PLGA/PPF composites showed similar biological activity and BMP-2 release profiles in vitro. In vivo, PPF/PLGA 85:15 composite released significantly less BMP-2 per time point in the first weeks. Micro-CT and histological analysis after 7 and 14 weeks of implantation showed bone formation, which significantly increased over time for all composites. No significant differences were seen between the composites. Overall, the results of this study show that small differences in BMP-2 sustained release had no significant effect on BMP-2 osteogenic efficacy in PPF/PLGA composites. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 477-487, 2018.
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Affiliation(s)
- Maurits G L Olthof
- Department of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Rochester, Minnesota, 55905.,Department of Orthopedic Surgery, Mayo Clinic College of Medicine, Rochester, Minnesota, 55905.,Department of Orthopedics, University Medical Center, 3508, GA, Utrecht, The Netherlands.,Faculty of Veterinary Medicine, Utrecht University, 3508, TD, Utrecht, The Netherlands
| | - Diederik H R Kempen
- Department of Orthopaedic Surgery, Onze Lieve Vrouwe Gasthuis, 1090, HM, Amsterdam, The Netherlands
| | - James L Herrick
- Department of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Rochester, Minnesota, 55905.,Department of Orthopedic Surgery, Mayo Clinic College of Medicine, Rochester, Minnesota, 55905
| | - Michael J Yaszemski
- Department of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Rochester, Minnesota, 55905.,Department of Orthopedic Surgery, Mayo Clinic College of Medicine, Rochester, Minnesota, 55905
| | - Wouter J A Dhert
- Department of Orthopedics, University Medical Center, 3508, GA, Utrecht, The Netherlands.,Faculty of Veterinary Medicine, Utrecht University, 3508, TD, Utrecht, The Netherlands
| | - Lichun Lu
- Department of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Rochester, Minnesota, 55905.,Department of Orthopedic Surgery, Mayo Clinic College of Medicine, Rochester, Minnesota, 55905
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24
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Yu L, Shi Z, Fang C, Zhang Y, Liu Y, Li C. Disposable lateral flow-through strip for smartphone-camera to quantitatively detect alkaline phosphatase activity in milk. Biosens Bioelectron 2015; 69:307-15. [DOI: 10.1016/j.bios.2015.02.035] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Revised: 02/10/2015] [Accepted: 02/23/2015] [Indexed: 11/16/2022]
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25
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Selegård R, Enander K, Aili D. Generic phosphatase activity detection using zinc mediated aggregation modulation of polypeptide-modified gold nanoparticles. NANOSCALE 2014; 6:14204-14212. [PMID: 25189321 DOI: 10.1039/c4nr02791d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A challenge in the design of plasmonic nanoparticle-based colorimetric assays is that the change in colloidal stability, which generates the colorimetric response, is often directly linked to the biomolecular recognition event. New assay strategies are hence required for every type of substrate and enzyme of interest. Here, a generic strategy for monitoring of phosphatase activity is presented where substrate recognition is completely decoupled from the nanoparticle stability modulation mechanism, which enables detection of a wide range of enzymes using different natural substrates with a single simple detection scheme. Phosphatase activity generates inorganic phosphate that forms an insoluble complex with Zn(2+). In a sample containing a preset concentration of Zn(2+), phosphatase activity will markedly reduce the concentration of dissolved Zn(2+) from the original value, which in turn affects the aggregation of gold nanoparticles functionalized with a designed Zn(2+) responsive polypeptide. The change in nanoparticle stability thus provides a rapid and sensitive readout of the phosphatase activity. The assay is not limited to a particular enzyme or enzyme substrate, which is demonstrated using three completely different phosphatases and five different substrates, and thus constitutes a highly interesting system for drug screening and diagnostics.
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Affiliation(s)
- Robert Selegård
- Division of Molecular Physics, Department of Physics, Chemistry and Biology, Linköping University, SE-583 36 Linköping, Sweden.
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Hayat A, Gonca Bulbul, Andreescu S. Probing phosphatase activity using redox active nanoparticles: A novel colorimetric approach for the detection of enzyme activity. Biosens Bioelectron 2014; 56:334-9. [DOI: 10.1016/j.bios.2014.01.003] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 12/18/2013] [Accepted: 01/01/2014] [Indexed: 10/25/2022]
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Sonnet C, Simpson CL, Olabisi RM, Sullivan K, Lazard Z, Gugala Z, Peroni JF, Weh JM, Davis AR, West JL, Olmsted-Davis EA. Rapid healing of femoral defects in rats with low dose sustained BMP2 expression from PEGDA hydrogel microspheres. J Orthop Res 2013; 31:1597-604. [PMID: 23832813 DOI: 10.1002/jor.22407] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Accepted: 05/13/2013] [Indexed: 02/04/2023]
Abstract
Current strategies for bone regeneration after traumatic injury often fail to provide adequate healing and integration. Here, we combined the poly (ethylene glycol) diacrylate (PEGDA) hydrogel with allogeneic "carrier" cells transduced with an adenovirus expressing BMP2. The system is unique in that the biomaterial encapsulates the cells, shielding them and thus suppressing destructive inflammatory processes. Using this system, complete healing of a 5 mm-long femur defect in a rat model occurs in under 3 weeks, through secretion of 100-fold lower levels of protein as compared to doses of recombinant BMP2 protein used in studies which lead to healing in 2-3 months. New bone formation was evaluated radiographically, histologically, and biomechanically at 2, 3, 6, 9, and 12 weeks after surgery. Rapid bone formation bridged the defect area and reliably integrated into the adjacent skeletal bone as early as 2 weeks. At 3 weeks, biomechanical analysis showed the new bone to possess 79% of torsional strength of the intact contralateral femur. Histological evaluation showed normal bone healing, with no infiltration of inflammatory cells with the bone being stable approximately 1 year later. We propose that these osteoinductive microspheres offer a more efficacious and safer clinical option over the use of rhBMP2.
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Affiliation(s)
- Corinne Sonnet
- Center for Cell and Gene Therapy, Baylor College of Medicine, One Baylor Plaza, Alkek Building, Room N1010, Houston, Texas 77030, USA
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YAMADA S, YOSHIZAWA Y, KAWAKUBO A, IKEDA T, YANAGIGUCHI K, HAYASHI Y. Early gene and protein expression associated with osteoblast differentiation in response to fish collagen peptides powder. Dent Mater J 2013; 32:233-40. [DOI: 10.4012/dmj.2012-188] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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A gold nanoparticles-based colorimetric assay for alkaline phosphatase detection with tunable dynamic range. Biosens Bioelectron 2012; 43:366-71. [PMID: 23356994 DOI: 10.1016/j.bios.2012.12.015] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2012] [Revised: 12/03/2012] [Accepted: 12/08/2012] [Indexed: 11/21/2022]
Abstract
In this report, a simple and label-free colorimetric assay was developed for detecting alkaline phosphatase (ALP). Based on the conjugated gold nanoparticle/adenosine triphosphate (AuNP/ATP) sensing system, this assay is highly sensitive and selective. In this system, ATP induces the aggregation of cetyltrimethylammonium bromide (CTAB)-capped AuNPs and ALP stimulates the disaggregation of AuNPs by converting ATP into adenosine through an enzymatic dephosphorylation reaction. Hence, the presence of ALP can be visually observed (gray-to-red color change) and monitored by the shift of the surface plasmon resonance (SPR) absorption band of AuNPs. Furthermore, the dynamic range of the method can be varied by addition of different metal ions (e.g. 100-600unit/L to 5.0-100unit/L and 0.2-20unit/L in the presence of Ca(2+) and Pb(2+), respectively). The feasibility of this sensitive and specific assay with a tunable dynamic range was demonstrated to be consistent even in human serum samples.
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Lee SS, Sharma AR, Choi BS, Jung JS, Chang JD, Park S, Salvati EA, Purdue EP, Song DK, Nam JS. The effect of TNFα secreted from macrophages activated by titanium particles on osteogenic activity regulated by WNT/BMP signaling in osteoprogenitor cells. Biomaterials 2012; 33:4251-63. [PMID: 22436801 DOI: 10.1016/j.biomaterials.2012.03.005] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Accepted: 03/03/2012] [Indexed: 12/22/2022]
Abstract
Wear particles are the major cause of osteolysis associated with failure of implant following total joint replacement. During this pathologic process, activated macrophages mediate inflammatory responses to increase osteoclastogenesis, leading to enhanced bone resorption. In osteolysis caused by wear particles, osteoprogenitors present along with macrophages at the implant interface may play significant roles in bone regeneration and implant osteointegration. Although the direct effects of wear particles on osteoblasts have been addressed recently, the role of activated macrophages in regulation of osteogenic activity of osteoblasts has scarcely been studied. In the present study, we examined the molecular communication between macrophages and osteoprogenitor cells that may explain the effect of wear particles on impaired bone forming activity in inflammatory bone diseases. It has been demonstrated that conditioned medium of macrophages challenged with titanium particles (Ti CM) suppresses early and late differentiation markers of osteoprogenitors, including alkaline phosphatase (ALP) activity, collagen synthesis, matrix mineralization and expression of osteocalcin and Runx2. Moreover, bone forming signals such as WNT and BMP signaling pathways were inhibited by Ti CM. Interestingly, TNFα was identified as a predominant factor in Ti CM to suppress osteogenic activity as well as WNT and BMP signaling activity. Furthermore, Ti CM or TNFα induces the expression of sclerostin (SOST) which is able to inhibit WNT and BMP signaling pathways. It was determined that over-expression of SOST suppressed ALP activity, whereas the inhibition of SOST by siRNA partially restored the effect of Ti CM on ALP activity. This study highlights the role of activated macrophages in regulation of impaired osteogenic activity seen in inflammatory conditions and provides a potential mechanism for autocrine regulation of WNT and BMP signaling mediated by TNFα via induction of SOST in osteprogenitor cells.
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Affiliation(s)
- Sang-Soo Lee
- Infectious Disease Medical Research Center & Department of Pharmacology, College of Medicine, Hallym University, Chucheon, Gangwon-do 200-702, Republic of Korea
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Lazard ZW, Heggeness MH, Hipp JA, Sonnet C, Fuentes AS, Nistal RP, Davis AR, Olabisi RM, West JL, Olmsted-Davis EA. Cell-based gene therapy for repair of critical size defects in the rat fibula. J Cell Biochem 2011; 112:1563-71. [PMID: 21344484 DOI: 10.1002/jcb.23068] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
More than a decade has passed since the first experiments using adenovirus-transduced cells expressing bone morphogenetic protein 2 were performed for the synthesis of bone. Since this time, the field of bone gene therapy has tackled many issues surrounding safety and efficacy of this type of strategy. We present studies examining the parameters of the timing of bone healing, and remodeling when heterotopic ossification (HO) is used for bone fracture repair using an adenovirus gene therapy approach. We use a rat fibula defect, which surprisingly does not heal even when a simple fracture is introduced. In this model, the bone quickly resorbs most likely due to the non-weight bearing nature of this bone in rodents. Using our gene therapy system robust HO can be introduced at the targeted location of the defect resulting in bone repair. The HO and resultant bone healing appeared to be dose dependent, based on the number of AdBMP2-transduced cells delivered. Interestingly, the HO undergoes substantial remodeling, and assumes the size and shape of the missing segment of bone. However, in some instances we observed some additional bone associated with the repair, signifying that perhaps the forces on the newly forming bone are inadequate to dictate shape. In all cases, the HO appeared to fuse into the adjacent long bone. The data collectively indicates that the use of BMP2 gene therapy strategies may vary depending on the location and nature of the defect. Therefore, additional parameters should be considered when implementing such strategies.
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Affiliation(s)
- Zawaunyka W Lazard
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston, Texas 77030, USA
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Karygianni L, Wiedmann-Al-Ahmad M, Finkenzeller G, Sauerbier S, Wolkewitz M, Hellwig E, Al-Ahmad A. Enterococcus faecalis affects the proliferation and differentiation of ovine osteoblast-like cells. Clin Oral Investig 2011; 16:879-87. [DOI: 10.1007/s00784-011-0563-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Accepted: 04/26/2011] [Indexed: 01/12/2023]
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Kumar A, Salimath BP, Schieker M, Stark GB, Finkenzeller G. Inhibition of metastasis-associated gene 1 expression affects proliferation and osteogenic differentiation of immortalized human mesenchymal stem cells. Cell Prolif 2011; 44:128-38. [PMID: 21401754 PMCID: PMC6495325 DOI: 10.1111/j.1365-2184.2010.00735.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2010] [Accepted: 09/13/2010] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVES MTA1 is known to be responsible for independent nucleosome remodelling and deacetylase complexes with ability to regulate divergent cellular pathways. However, additional biological functions have, up to now, remained largely unexplored. The present study was initiated to investigate involvement of MTA1 in osteogenic differentiation of immortalized human mesenchymal stem cells (MSCs). MATERIALS AND METHODS MSCs were examined for expression of MTA1 and stably transfected clones expressing shRNA to MTA1 were generated. Cells were grown under osteogenic and non-osteogenic conditions. Effects of silencing on cell proliferation, calcium deposition and alkaline phosphatase (ALP) activity were studied. mRNA expression of bone sialoprotein (BSP), osteopontin (OSP), runt-related transcription factor 2 (Runx2), osteocalcin (OC), collagen type I (Col1A) and ALP were analysed. RESULTS Transfected cells showed reduction in proliferation and significant increase in calcium deposition and expression of osteogenic marker genes, BSP, OSP, Runx2, OC and Col1A, when they were grown under osteogenic conditions. Under non-osteogenic conditions, expression of BSP and OSP were also markedly upregulated, whereas expression of osteogenic marker genes, Runx2, OC and Col1A, was almost unaffected. Expression of ALP was slightly suppressed under non-osteogenic conditions but significantly increased under osteogenic differentiation conditions, as assessed by enzyme activity and mRNA expression assays. CONCLUSIONS Our data collectively suggest that endogenously produced MTA1 constrains osteogenic differentiation of MSCs and that targeting of this molecule may provide a novel strategy for enhancing bone regeneration.
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Affiliation(s)
- A. Kumar
- Department of Plastic and Hand Surgery, University of Freiburg Medical Center, Freiburg, Germany
- Department of Studies in Biotechnology, University of Mysore, Manasagangotri, Mysore, Karnataka, India
| | - B. P. Salimath
- Department of Studies in Biotechnology, University of Mysore, Manasagangotri, Mysore, Karnataka, India
| | - M. Schieker
- Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig‐Maximilians‐University Munich, Munich, Germany
| | - G. B. Stark
- Department of Plastic and Hand Surgery, University of Freiburg Medical Center, Freiburg, Germany
| | - G. Finkenzeller
- Department of Plastic and Hand Surgery, University of Freiburg Medical Center, Freiburg, Germany
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Popelut A, Rooker SM, Leucht P, Medio M, Brunski JB, Helms JA. The acceleration of implant osseointegration by liposomal Wnt3a. Biomaterials 2010; 31:9173-81. [PMID: 20864159 DOI: 10.1016/j.biomaterials.2010.08.045] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2010] [Accepted: 08/19/2010] [Indexed: 11/29/2022]
Abstract
The strength of a Wnt-based strategy for tissue regeneration lies in the central role that Wnts play in healing. Tissue injury triggers local Wnt activation at the site of damage, and this Wnt signal is required for the repair and/or regeneration of almost all tissues including bone, neural tissues, myocardium, and epidermis. We developed a biologically based approach to create a transient elevation in Wnt signaling in peri-implant tissues, and in doing so, accelerated bone formation around the implant. Our subsequent molecular and cellular analyses provide mechanistic insights into the basis for this pro-osteogenic effect. Given the essential role of Wnt signaling in bone formation, this protein-based approach may have widespread application in implant osseointegration.
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Affiliation(s)
- Antoine Popelut
- Department of Periodontology, Service of Odontology, Hotel-Dieu Hospital, AP-HP, U.F.R. of Odontology, Paris 7 Denis Diderot University, Paris, France
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Kumar A, Salimath BP, Stark GB, Finkenzeller G. Platelet-derived growth factor receptor signaling is not involved in osteogenic differentiation of human mesenchymal stem cells. Tissue Eng Part A 2010; 16:983-93. [PMID: 19839721 DOI: 10.1089/ten.tea.2009.0230] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Platelet-derived growth factor (PDGF) receptor signaling plays an important role in the regulation of proliferation and migration of skeletal cells such as osteoblasts or mesenchymal stem cells (MSCs). However, involvement of these receptors in the process of osteoblastic differentiation of MSCs is still a matter of debate. The aim of our study was to examine the role of PDGF receptor signaling in osteogenic differentiation of human MSCs. For this purpose, we performed PDGF receptor stimulation as well as inhibition experiments. Inhibition experiments were carried out with Tyrphostin AG1296, a potent and specific inhibitor of PDGF receptor activity. As expected, Tyrphostin AG1296 treatment caused a concentration-dependent decrease in fetal calf serum and PDGF-BB-induced proliferation of MSCs and effectively inhibited PDGF-BB-induced phosphorylation of extracellular-regulated kinase 1/2. However, PDGF receptor inhibition had no significant effect on osteoblastic differentiation of MSCs, as evaluated histochemically by von Kossa, Alizarin-Red, and osteocalcin stainings. Moreover, mineralized matrix production, as assayed by quantitative Ca(2+)-measurements, was also not modulated by Tyrphostin AG1296 treatment. These results were noticeable irrespective of whether MSCs were grown under nonosteogenic or osteogenic differentiation conditions. Similarly, PDGF-BB treatment of MSCs in receptor stimulation experiments also failed to modulate mineralization. However, expression of alkaline phosphatase was suppressed by Tyrphostin AG1296 treatment at later stages of osteogenesis but not in the early stages, as assessed by enzyme activity and mRNA expression assays. Expression of other osteogenic marker genes such as osteocalcin, runt-related transcription factor 2, osteopontin, collagen type I, and bone sialoprotein was almost unaffected in our perturbation studies. From these experiments, we conclude that PDGF receptor signaling sustains proliferation without affecting osteogenic differentiation of MSCs.
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Affiliation(s)
- Akhilesh Kumar
- Department of Plastic and Hand Surgery, University of Freiburg Medical Center, Freiburg, Germany
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Minear S, Leucht P, Jiang J, Liu B, Zeng A, Fuerer C, Nusse R, Helms JA. Wnt Proteins Promote Bone Regeneration. Sci Transl Med 2010; 2:29ra30. [DOI: 10.1126/scitranslmed.3000231] [Citation(s) in RCA: 206] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Hager S, Lampert FM, Orimo H, Stark GB, Finkenzeller G. Up-regulation of alkaline phosphatase expression in human primary osteoblasts by cocultivation with primary endothelial cells is mediated by p38 mitogen-activated protein kinase-dependent mRNA stabilization. Tissue Eng Part A 2010; 15:3437-47. [PMID: 19409035 DOI: 10.1089/ten.tea.2009.0133] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
For the regeneration of bone in tissue engineering applications, it is essential to provide cues that support neovascularization. This can be achieved by cell-based therapies using mature endothelial cells (ECs) or endothelial progenitor cells. In this context, ECs were used in various in vivo studies in combination with primary osteoblasts to enhance neovascularization of bone grafts. In a previous study, we have shown that cocultivation of human primary ECs and human primary osteoblasts (hOBs) leads to a cell contact-dependent up-regulation of alkaline phosphatase (ALP) expression in osteoblasts, indicating that cocultivated ECs may support osteogenic differentiation and osteoblastic cell functions. In the present study, we investigated this effect in more detail, revealing a time and cell number dependency of EC-mediated up-regulation of the early osteoblastic marker ALP, whereas osteocalcin, a late marker of osteogenesis, was down-regulated. The effect on ALP expression was bidirectional specific for both cell types. Functional inhibition of gap junctional communication between ECs and hOBs by 18alpha-glycyrrhetinic acid had only a weak suppressive effect on EC-mediated ALP up-regulation. In contrast, inhibition of p38 mitogen-activated protein kinase nearly completely prevented the EC-mediated stimulation of osteoblastic ALP expression. To investigate the molecular mechanism underlying the ALP up-regulation, we examined the effect of EC cocultivation on osteoblastic ALP promoter activity as well as mRNA stability. Cocultivation of ECs with hOBs significantly elevated the half-life of osteoblastic ALP mRNA without affecting its promoter activity. In summary, our data show that EC-mediated up-regulation of osteoblastic ALP expression is cell-type specific and is posttranscriptionally regulated via p38 mitogen-activated protein kinase-dependent mRNA turn-over.
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Affiliation(s)
- Sven Hager
- Department of Plastic and Hand Surgery, University of Freiburg Medical Center, Freiburg, Germany
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Kretlow JD, Mikos AG. 2007 AIChE Alpha Chi Sigma Award: From Material to Tissue: Biomaterial Development, Scaffold Fabrication, and Tissue Engineering. AIChE J 2008; 54:3048-3067. [PMID: 19756176 DOI: 10.1002/aic.11610] [Citation(s) in RCA: 98] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The need for techniques to facilitate the regeneration of failing or destroyed tissues remains great with the aging of the worldwide population and the continued incidence of trauma and diseases such as cancer. A 16-year history in biomaterial scaffold development and tissue engineering is examined, beginning with the synthesis of novel materials and fabrication of 3D porous scaffolds. Exploring cell-scaffold interactions and subsequently cellular delivery using biomaterial carriers, we have developed a variety of techniques for bone and cartilage engineering. In addition to delivering cells, we have utilized growth factors, DNA, and peptides to improve the in vitro and in vivo regeneration of tissues. This review covers important developments and discoveries within our laboratory, and the increasing breadth in the scope of our work within the expanding field of tissue engineering is presented.
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Affiliation(s)
- James D Kretlow
- Department of Bioengineering, Rice University, P.O. Box 1892, MS 142, Houston, TX 77251-1892
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Mehlhorn AT, Niemeyer P, Kaschte K, Muller L, Finkenzeller G, Hartl D, Sudkamp NP, Schmal H. Differential effects of BMP-2 and TGF-beta1 on chondrogenic differentiation of adipose derived stem cells. Cell Prolif 2007; 40:809-23. [PMID: 18021172 DOI: 10.1111/j.1365-2184.2007.00473.x] [Citation(s) in RCA: 106] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
OBJECTIVES This article addresses the interaction of transforming growth factor beta1 (TGF-beta1) and bone morphogenic protein 2 (BMP-2) during osteo-chondrogenic differentiation of adipose-derived adult stem cells (ASC). TGF-beta1 was expected to modulate the BMP-2-induced effects through transcriptional regulation of Dlx-5, Msx-2 and Runx-2. MATERIALS AND METHODS Encapsulated ASC were cultured for 14 days in medium containing TGF-beta1 and/or BMP-2. mRNA expression of the extracellular matrix molecules col2a1, cartilage oligomeric matrix protein, col10a1, alkaline phosphatase (AP) and transcription factors Msx-2, Dlx-5 and Runx-2 was analysed. Release of glycosaminoglycans, collagen types II and X into the extracellular matrix was demonstrated. RESULTS BMP-2 and TGF-beta1 induced a chondrogenic phenotype in ASC. Combined growth factor treatment had a synergistic effect on col10a1 and an additive effect on col2a1 mRNA expression. Synthesis of glycosaminoglycans was enhanced by combined growth factor treatment. Addition of TGF-beta1 inhibited BMP-2 induced AP expression and activity and both proteins promoted chondrogenic maturation. CONCLUSIONS Prevention of BMP-2-induced osteogenic transdifferentiation by TGF-beta1 seemed not to be mediated by transcriptional regulation of Dlx-5. Due to these findings, simultaneous stimulation of ASC with BMP-2 and TGF-beta1 seemed to be beneficial for complete differentiation of ASC into chondrocytes.
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Affiliation(s)
- A T Mehlhorn
- Department of Orthopaedic and Trauma Surgery, University Medical Center Freiberg, Germany.
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Bikram M, Fouletier-Dilling C, Hipp JA, Gannon F, Davis AR, Olmsted-Davis EA, West JL. Endochondral Bone Formation from Hydrogel Carriers Loaded with BMP2-transduced Cells. Ann Biomed Eng 2007; 35:796-807. [PMID: 17340196 DOI: 10.1007/s10439-007-9263-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2006] [Accepted: 01/22/2007] [Indexed: 10/23/2022]
Abstract
The success of ex vivo viral gene therapy systems for promoting bone formation could be improved through the development of systems to spatially localize gene expression. Towards this goal, we have encapsulated adenovirus-transduced human diploid fetal lung fibroblasts (MRC-5) expressing bone morphogenetic protein-type 2 (BMP-2) within non-degradable poly(ethylene glycol)-diacrylate (PEG-DA) hydrogels and implanted these intramuscularly to promote endochondral bone formation. To optimize BMP-2 secretion, the molecular weight of the polymers and cell densities were varied. Polymers with molecular weights of 6, 10, and 20 kDa were used to prepare hydrogels containing 1, 5, or 10 million transduced cells. The results showed that 10 million transduced fibroblasts that was the maximum number of cells feasible for encapsulation within PEG-DA 10 and 20 kDa hydrogels produced the highest amount of secreted BMP-2 protein. Encapsulation of MRC-5 and transduced fibroblasts resulted in 71 and 58% cell viability, respectively. The bioactivity of secreted BMP-2 protein from the hydrogels was confirmed with an alkaline phosphatase assay. Micro-CT of the lower limb muscles of NOD/SCID mice following implantation with hydrogels showed 39.5 +/- 25.0 mm3 mineralized tissue and 31.8 +/- 7.8 mm3 for the cell-injected mice, and the bone was localized to the hydrogel surfaces. Histology revealed bone as well as cartilage for both hydrogel implanted and cell-injected animals.
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Affiliation(s)
- Malavosklish Bikram
- Department of Pharmacological and Pharmaceutical Sciences, University of Houston, 1441 Moursund Street, Houston, TX 77030, USA
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Sun S, Liu Y, Lipsky S, Cho M. Physical manipulation of calcium oscillations facilitates osteodifferentiation of human mesenchymal stem cells. FASEB J 2007; 21:1472-80. [PMID: 17264165 DOI: 10.1096/fj.06-7153com] [Citation(s) in RCA: 145] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The role of cytosolic calcium oscillation has long been recognized in the regulation of cellular and molecular interactions. Information embedded in calcium oscillation can provide molecular cues for cell behavior such as cell differentiation. Although calcium dynamics are versatile and likely to depend on the cell type, the calcium dynamics in human mesenchymal stem cells (hMSCs) and its role in differentiation are yet to be fully elucidated. In the present study we characterized the calcium oscillation profiles in hMSCs before and after subjecting the cells to the osteoinductive factors. Our findings indicate that the calcium spikes decreased rapidly with osteodifferentiation to a level observed in terminally differentiated human osteoblasts. In addition, the calcium oscillations appear to serve as a bidirectional signal during hMSC differentiation. While an altered calcium oscillation pattern may be an indicator for hMSC differentiation, it is also likely to be involved in directing hMSC differentiation. Treatment of hMSCs with a noninvasive electrical stimulation, for example, not only altered the calcium oscillations but also facilitated osteodifferentiation. Regulation of calcium oscillation by external physical stimulation could amplify hMSC differentiation into a tissue-specific lineage and may offer an alternate biotechnology to harness the unique properties of stem cells.
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Affiliation(s)
- Shan Sun
- Department of Bioengineering, University of Illinois, Chicago, Chicago, IL 60607, USA
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Mehlhorn AT, Schmal H, Kaiser S, Lepski G, Finkenzeller G, Stark GB, Südkamp NP. Mesenchymal stem cells maintain TGF-beta-mediated chondrogenic phenotype in alginate bead culture. ACTA ACUST UNITED AC 2006; 12:1393-403. [PMID: 16846338 DOI: 10.1089/ten.2006.12.1393] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
This article addresses the stability of chondrogenic phenotype and the transdifferentiation potential of bone marrow-derived mesenchymal stem cells (MSCs) at distinct stages of differentiation. Differentiated MSCs were expected to maintain cartilage-like gene expression pattern in the absence of any chondrogenic growth factor or in the presence of osteogenic signals. MSCs encapsulated in alginate beads were treated with transforming growth factor (TGF)-beta 3 for 3, 6, or 14 days and then cultured in absence of TGF-beta for the remainder of the 2-week culture period. Additionally, cells were cultured in osteogenic medium after TGF-beta-mediated chondroinduction. Gene expression of col2a1, aggrecan, COMP, alkaline phosphatase (AP), and correlating protein synthesis was analyzed. After short-term stimulation with TGF-beta, MSCs maintained a chondrogenic phenotype. Chondrogenic gene expression and protein synthesis directly correlated with the extent of stimulation time and the concentration of TGF-beta. Pretreatment with TGF-beta could prevent AP mRNA expression of encapsulated MSCs. TGF- beta stimulation within the first 3 days of culture seems to be crucial for the expression of a chondrogenic phenotype. Fully differentiated and encapsulated MSCs are not able to transdifferentiate into osteoblasts. These findings give rise to a better understanding of the behavior of cartilage grafts affected by local factors of osteochondral transplantation sites in vivo.
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Affiliation(s)
- A T Mehlhorn
- Department of Orthopaedic and Trauma Surgery, Albert-Ludwigs University Freiburg, Freiburg, Germany.
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Stangenberg L, Schaefer DJ, Buettner O, Ohnolz J, Möbest D, Horch RE, Stark GB, Kneser U. Differentiation of osteoblasts in three-dimensional culture in processed cancellous bone matrix: quantitative analysis of gene expression based on real-time reverse transcription-polymerase chain reaction. ACTA ACUST UNITED AC 2006; 11:855-64. [PMID: 15998225 DOI: 10.1089/ten.2005.11.855] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Processed bovine cancellous bone (PBCB) is an attractive material for tissue engineering of bone. It is biocompatible, osteoconductive, nonimmunogenic, and porous and its biomechanical properties are close to those of native bone. In this study, differentiation of primary rat osteoblasts (rOBs) incubated on PBCB was investigated in vitro. rOBs were isolated and expanded in two-dimensional culture. Expanded rOBs were seeded into PBCB disks and cultured either in basal medium (BM) or differentiation medium (DM) containing ascorbic acid, beta-glycerol phosphate, and dexamethasone. Alkaline phosphatase (ALP) activity and RNA expression of ALP, bone sialoprotein (BSP), collagen type I (COL1), osteocalcin (OC), and osteopontin (OPN) were assessed by chemiluminescence assay and quantitative real-time RT-PCR over 14 days. Histologic analysis was performed on day 14. ALP increased over the observation period independent of stimulation. OPN and BSP expression was significantly higher in the DM group whereas COL1 and OC expression was significantly higher in the BM group. Matrix calcification was detectable only in the DM group by von Kossa stain. The observed expression patterns suggest a physiological response of rOBs to the differentiation stimulus. PBCB is a suitable matrix for in vitro differentiation of osteoblasts. Cell-seeded PBCB is a potential osteogenic construct for in vivo application.
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Affiliation(s)
- Lars Stangenberg
- Department of Plastic and Hand Surgery, University of Freiburg Medical Center, Freiburg, Germany
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Fouletier-Dilling CM, Bosch P, Davis AR, Shafer JA, Stice SL, Gugala Z, Gannon FH, Olmsted-Davis EA. Novel Compound Enables High-Level Adenovirus Transduction in the Absence of an Adenovirus-Specific Receptor. Hum Gene Ther 2005; 16:1287-97. [PMID: 16259562 DOI: 10.1089/hum.2005.16.1287] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Viral vectors are extensively used to deliver foreign DNA to cells for applications ranging from basic research to potential clinical therapies. A limiting step in this process is virus uptake and internalization into the target cells, which is mediated by membrane receptors. Although it is possible to modify viral capsid proteins to target the viruses, such procedures are complex and often unsuccessful. Here we present a rapid, inexpensive system for improving transduction of cells, including those that lack receptors for adenovirus fiber proteins. Addition of GeneJammer (Stratagene, La Jolla, CA) during the adenovirus transduction led to a significant increase in both the total number of transduced cells and the level of transgene expression per cell. Studies using cell lines deficient in adenovirus receptors demonstrated that addition of GeneJammer provided a novel cellular entry mechanism for the virus. These findings were tested in a cell-based gene therapy system for the induction of bone, which is contingent on high-level expression of the transgene. Inclusion of GeneJammer in either Ad5BMP2 or Ad5F35BMP2 transduction of a variety of cells demonstrated a correlating increase in bone formation. The results suggest a novel and versatile method for achieving high-level transduction using adenovirus.
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Karageorgiou V, Meinel L, Hofmann S, Malhotra A, Volloch V, Kaplan D. Bone morphogenetic protein-2 decorated silk fibroin films induce osteogenic differentiation of human bone marrow stromal cells. ACTA ACUST UNITED AC 2004; 71:528-37. [PMID: 15478212 DOI: 10.1002/jbm.a.30186] [Citation(s) in RCA: 213] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Bone morphogenetic protein (BMP)-2 has a critical role in bone formation and regeneration. Therefore, the ability to immobilize this molecule in certain matrices may be crucial in bone tissue engineering. Using carbodiimide chemistry, BMP-2 was directly immobilized on silk fibroin films. Whereas human bone marrow stromal cells cultured on unmodified silk fibroin films in the presence of osteogenic stimulants exhibited little if any osteogenesis, the same cells cultured on BMP-2 decorated films in the presence of osteogenic stimulants differentiated into an osteoblastic lineage as assessed by their significantly elevated alkaline phosphatase activity, calcium deposition, and higher transcript levels of collagen type I, bone sialoprotein, osteopontin, osteocalcin, BMP-2, and cbfa1. Using cell culture inserts, it was demonstrated that differentiation was induced by the immobilized protein and not by protein released into the culture medium. Comparison with a similar amount of medium-supplemented BMP-2, where no additional protein was added with medium changes, showed that delivery of BMP-2 immobilized on the biomaterial surface was more efficient than soluble delivery. The results illustrate that BMP-2 covalently coupled on silk biomaterial matrices retains biological function in vitro based on the induction of osteogenic markers in seeded bone marrow stromal cells.
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Affiliation(s)
- Vassilis Karageorgiou
- Department of Chemical and Biological Engineering, Tufts University, 4 Colby Street, Medford, Massachusetts 02155, USA
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Stahl A, Wenger A, Weber H, Stark GB, Augustin HG, Finkenzeller G. Bi-directional cell contact-dependent regulation of gene expression between endothelial cells and osteoblasts in a three-dimensional spheroidal coculture model. Biochem Biophys Res Commun 2004; 322:684-92. [PMID: 15325284 DOI: 10.1016/j.bbrc.2004.07.175] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2004] [Indexed: 11/29/2022]
Abstract
Multiple cell-cell interactions control bone morphogenesis and vascularization. We have employed a spheroidal coculture system of endothelial cells (EC) and osteoblasts (OB) to study cell contact-dependent gene regulation between these two cell types that may play a role in regulating OB differentiation and EC angiogenic properties. Coculture spheroids differentiate spontaneously to organize into a core of OB and a surface layer of endothelial cells. Individual spheroid culture of EC or OB leads to significant alterations in gene expression compared to standard monolayer culture (upregulation of Tie-2 in EC; upregulation of angiopoietin-2 in osteoblasts). More importantly, spheroidal coculture of endothelial cells and osteoblasts leads to significant changes of gene expression in both cell populations (upregulation of VEGFR-2 in EC; downregulation of VEGF, and upregulation of alkaline phosphatase in osteoblasts). These changes are dependent on cell-cell contact and are not seen in stimulation experiments with conditioned supernatants. Collectively, the data demonstrate complex bi-directional gene regulation mechanisms between EC and OB that are likely to play a critical role during OB differentiation and in controlling the properties of angiogenic EC.
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Affiliation(s)
- Andreas Stahl
- Department of Plastic Surgery, University of Freiburg Medical Center, D-79106 Freiburg, Germany
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Blum JS, Parrott MB, Mikos AG, Barry MA. Early osteoblastic differentiation induced by dexamethasone enhances adenoviral gene delivery to marrow stromal cells. J Orthop Res 2004; 22:411-6. [PMID: 15013104 DOI: 10.1016/j.orthres.2003.08.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2003] [Accepted: 08/11/2003] [Indexed: 02/04/2023]
Abstract
We investigated the implications of induced osteogenic differentiation on gene delivery in multipotent rat marrow stromal cells (MSCs). Prior to genetic manipulation cells were cultured with or without osteogenic supplements (5x10(-8) M dexamethasone, 160 microM l-ascorbic acid 2-phosphate, and 10 mM beta-glycerophosphate). Comparison of liposome, retroviral, and adenoviral vectors demonstrated that all three vectors could mediate gene delivery to primary rat MSCs. When these vectors were applied in the absence or presence of osteogenic supplements, we found that MSCs differentiated prior to transduction with adenovirus type 5 vectors produced a 300% increase in transgene expression compared to MSCs that were not exposed to osteogenic supplements. This differentiation effect appeared specific to adenoviral mediated gene delivery, since there was minimal increase in retroviral gene delivery and no increase in liposome gene delivery when MSCs were treated with osteogenic supplements. In addition, we also determined this increase in transgene production to occur at a higher concentration of dexamethasone (5x10(-8) M) in the culture medium of MSCs prior to adenoviral transduction. We found that this increased transgene production could be extended to the osteogenic protein, human bone morphogenetic protein 2 (hBMP-2). When delivered by an adenoviral vector, hBMP-2 transgene production could be increased from 1.4 ng/10(5) cells/3 days to 4.3 ng/10(5) cells/3 days by culture of MSCs with osteogenic supplements prior to transduction. These results indicate that the utility of MSCs as a therapeutic protein delivery mechanism through genetic manipulation can be enhanced by pre-culture of these cells with dexamethasone.
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Affiliation(s)
- Jeremy S Blum
- Department of Bioengineering, Rice University, Houston, TX, USA
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Blum JS, Barry MA, Mikos AG, Jansen JA. In Vivo Evaluation of Gene Therapy Vectors in Ex Vivo-Derived Marrow Stromal Cells for Bone Regeneration in a Rat Critical-Size Calvarial Defect Model. Hum Gene Ther 2003; 14:1689-701. [PMID: 14670121 DOI: 10.1089/104303403322611719] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Cells genetically modified to produce osteoinductive factors have potential for use in enhancing bone regeneration for reconstructive applications. Genetic modification of cells can be accomplished by a variety of gene therapy vectors. In this study we evaluated the ex vivo genetic modification of rat marrow stromal cells (MSCs) by adenoviral, retroviral, and cationic lipid vectors containing the gene for human bone morphogenetic protein 2 (hBMP-2). We investigated both the in vitro and in vivo osteogeneic potential of MSCs modified by each vector. In vitro, we found that only MSCs modified with the adenoviral vector produced detectable hBMP-2 and demonstrated a statistically significant increase in endogenous alkaline phosphatase activity indicative of osteogeneic differentiation. We further investigated the ability of genetically modified MSCs seeded on a titanium mesh scaffold to facilitate bone formation in vivo. In an orthotopic critical-size defect created in the rat cranium, bone formation was observed in all conditions with MSCs modified by the adenoviral vector demonstrating a small but statistically significant increase in bone formation relative to the other vectors and control. Implants in an ectopic location demonstrated minimal bone formation relative to the orthotopic location, with MSCs modified with cationic lipids forming less bone than the other vectors and control. Our results show that MSCs genetically modified with adenovirus containing the hBMP-2 gene had enhanced osteogeneic capacity relative to unmodified MSCs or MSCs modified by the other vectors. This study was the first to compare three different gene therapy vectors for the genetic modification of cells to produce osteoinductive factors for the purpose to enhance bone regeneration.
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Affiliation(s)
- Jeremy S Blum
- Department of Bioengineering, Rice University, Houston, TX 77251, USA
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Payne RG, Yaszemski MJ, Yasko AW, Mikos AG. Development of an injectable, in situ crosslinkable, degradable polymeric carrier for osteogenic cell populations. Part 1. Encapsulation of marrow stromal osteoblasts in surface crosslinked gelatin microparticles. Biomaterials 2002; 23:4359-71. [PMID: 12219826 DOI: 10.1016/s0142-9612(02)00184-9] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
This study investigated the temporary encapsulation of rat marrow stromal osteoblasts in surface crosslinked gelatin microparticles. Cells were encapsulated in uncrosslinked gelatin microparticles of average diameter of 630 microm containing approximately 53 cells. Gelatin microparticles were crosslinked to shell thicknesses of approximately 75 microm via exposure to 1 mM dithiobis(succinimidylpropionate) (DSP) solution for 15 min or 5 mm DSP solution for 5 min for the production of microparticles dispersing approximately 60 min after placement into a physiologic fluid at 37 degrees C. Formed microparticles were placed into culture wells at a cell seeding density of 5.3 x 10(4) cells/cm2 and, following the degradation and/or dissolution of gelatin, the cells were cultured in the presence of osteogenic supplements for 28 days. Samples were taken at specified time points and analyzed by a DNA assay for cell number and a 3H-thymidine incorporation assay for proliferative potential. Samples were also obtained and analyzed at several time points by alkaline phosphatase, osteocalcin, and mineralization assays for early and late phenotypic expression markers of osteoblastic differentiation. The measurements from the different assays for encapsulated cells (EC) in uncrosslinked and crosslinked gelatin microparticles were normalized with the cell numbers from the DNA assay and compared with those for nonencapsulated control cells. The results demonstrated that the marrow stromal cells survived the encapsulation procedure in uncrosslinked gelatin microparticles and also retained their proliferative potential and osteoblastic phenotype over a 28 day period, although at a slightly lower level than the nonencapsulated cells. The results further showed that the marrow stromal cells survived the encapsulation in crosslinked gelatin microparticles prepared via exposure to 5mm DSP for 5 min and also retained their proliferative potential and osteoblastic phenotype over a 28 day period, but at a slightly lower level than the EC in uncrosslinked gelatin microparticles. In contrast, exposure to 1 mM DSP for 15 min led to severely limited cell viability and phenotypic expression probably due to the increased crosslinking time. These results suggest that temporary encapsulation of cells in gelatin microparticles may protect cells from short-term environmental effects such as those associated with the crosslinking of an injectable polymeric carrier for bone tissue engineering.
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Affiliation(s)
- Richard G Payne
- Department of Chemical Engineering, Rice University, Houston, TX 77005-1892, USA
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Salgado A, Gomes M, Chou A, Coutinho O, Reis R, Hutmacher D. Preliminary study on the adhesion and proliferation of human osteoblasts on starch-based scaffolds. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2002. [DOI: 10.1016/s0928-4931(02)00009-7] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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