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Meng Y, Munir MT, Wu X, Huang Y, Yu W, Li B. Phosphorus Recovery and Tetracycline Mitigation: The Role of Bacillus cereus LB-9 in Struvite Biomineralization from Wastewater. CHEMOSPHERE 2024:142823. [PMID: 38996978 DOI: 10.1016/j.chemosphere.2024.142823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2024] [Revised: 06/22/2024] [Accepted: 07/08/2024] [Indexed: 07/14/2024]
Abstract
Struvite biomineralization is an ecologically sound technology adepts at the efficient recovery and recycling of phosphorus from wastewater. However, the biomineralization process is often perturbed by the presence of antibiotics, notably tetracycline (TC), the impact of which on the biomineralization system has not been elucidated. This study examines the efficacy of Bacillus cereus LB-9 in struvite biomineralization, focusing on the precipitates' composition, morphology, and TC content. LB-9 facilitate an alkaline environment that effectively recovering nitrogen and phosphorus. These findings indicate that TC retards the initial formation of struvite and the concurrent recovery of nitrogen and phosphorus. Nonetheless, at sub-10 mg/L TC concentrations, TC enhanced struvite production (0.38g) by stimulating LB-9's growth and metabolic activity. Conversely, at 10 mg/L TC, the strain's activity was markedly suppressed within the initial four days. This data suggest that TC promotes the strain's proliferation and metabolism, potentially through cellular secretions, thereby augmenting phosphorus recovery from wastewater. Notably, the recovered struvite doesn't contain TC, aligning with regulatory standards for agricultural application. In summary, LB-9-mediated struvite recovery is an effective strategy for producing phosphorus-enriched fertilizers and mitigating TC contamination, offering significant implications for wastewater treatment and industrial process development, particularly in the context of prevalent TC in wastewater.
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Affiliation(s)
- Yi Meng
- Water Research Center, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | | | - Xiaofeng Wu
- Water Research Center, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Yuefei Huang
- Water Research Center, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; School of Water Resources and Electric Power, Key Laboratory of Water Ecological Remediation and Protection at Headwater Regions of Big Rivers, Ministry of Water Resources, Qinghai University, Xining, Qinghai, China; State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai, China
| | - Wei Yu
- Department of Chemical & Materials Engineering, University of Auckland, 0926, New Zealand
| | - Bing Li
- Water Research Center, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.
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Taher Mohamed SA, Emin N. Effects of using collagen and aloe vera grafted fibroin scaffolds on osteogenic differentiation of rat bone marrow mesenchymal stem cells in SBF-enriched cell culture medium. Biomed Mater 2023; 19:015011. [PMID: 38055984 DOI: 10.1088/1748-605x/ad12e2] [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: 08/18/2023] [Accepted: 12/06/2023] [Indexed: 12/08/2023]
Abstract
In the study, collagen and aloe vera were grafted onto silk fibroin with two different methods, and 3D-microporous scaffolds (1F5C4A1 and 2F5C4A1) were formed by lyophilization. Three osteogenic cultures were started by seeding rat bone marrow mesenchymal stem cells (MSCs) and pre-induced MSC (osteoblast (OB)) on biopolymeric scaffolds. The osteogenic medium was enriched with 10% (v/v) simulated body fluid (SBF) to promote mineralization and osteogenic differentiation in one of the MSC cultures and the OB culture. X-ray diffraction (XRD), scanning electron microscopy (SEM), scanning electron microscopy- energy dispersive spectrum (SEM-EDS) analyses on cellular samples and histochemical (alizarin red, safranin-O, alcian blue) and immunohistochemical (anti-collagen-1, anti-osteocalcin, anti-osteopontin) staining showed that bone-like mineralization was occurred by both chemically and cellular activity. In addition, pre-osteogenic induction of MSCs in 2D-cultured was found to promote osteogenesis more rapidly when started 3D-cultured. These results indicated that enrichment of the cell culture medium with SBF is sufficient forin vitromineralization rather than using high concentrations of SBF. The findings showed that OB cells on the 2F5C4A1 scaffold obtained the best osteogenic activity. Still, other culture media with 10% SBF content could be used for bone tissue engineering under osteogenic induction.
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Affiliation(s)
- Salma A Taher Mohamed
- Material Science and Engineering Department, Institute of Science and Technology, Kastamonu University, Kastamonu, Turkey
| | - Nuray Emin
- Material Science and Engineering Department, Institute of Science and Technology, Kastamonu University, Kastamonu, Turkey
- Biomedical Engineering Department, Engineering and Architecture Faculty, Kastamonu University, Kastamonu, Turkey
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Sebinelli HG, Andrilli LHS, Favarin BZ, Cruz MAE, Bolean M, Fiore M, Chieffo C, Magne D, Magrini A, Ramos AP, Millán JL, Mebarek S, Buchet R, Bottini M, Ciancaglini P. Shedding Light on the Role of Na,K-ATPase as a Phosphatase during Matrix-Vesicle-Mediated Mineralization. Int J Mol Sci 2022; 23:ijms232315072. [PMID: 36499456 PMCID: PMC9739803 DOI: 10.3390/ijms232315072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 11/26/2022] [Accepted: 11/29/2022] [Indexed: 12/03/2022] Open
Abstract
Matrix vesicles (MVs) contain the whole machinery necessary to initiate apatite formation in their lumen. We suspected that, in addition to tissue-nonspecific alkaline phosphatase (TNAP), Na,K,-ATPase (NKA) could be involved in supplying phopshate (Pi) in the early stages of MV-mediated mineralization. MVs were extracted from the growth plate cartilage of chicken embryos. Their average mean diameters were determined by Dynamic Light Scattering (DLS) (212 ± 19 nm) and by Atomic Force Microcopy (AFM) (180 ± 85 nm). The MVs had a specific activity for TNAP of 9.2 ± 4.6 U·mg-1 confirming that the MVs were mineralization competent. The ability to hydrolyze ATP was assayed by a colorimetric method and by 31P NMR with and without Levamisole and SBI-425 (two TNAP inhibitors), ouabain (an NKA inhibitor), and ARL-67156 (an NTPDase1, NTPDase3 and Ecto-nucleotide pyrophosphatase/phosphodiesterase 1 (NPP1) competitive inhibitor). The mineralization profile served to monitor the formation of precipitated calcium phosphate complexes, while IR spectroscopy allowed the identification of apatite. Proteoliposomes containing NKA with either dipalmitoylphosphatidylcholine (DPPC) or a mixture of 1:1 of DPPC and dipalmitoylphosphatidylethanolamine (DPPE) served to verify if the proteoliposomes were able to initiate mineral formation. Around 69-72% of the total ATP hydrolysis by MVs was inhibited by 5 mM Levamisole, which indicated that TNAP was the main enzyme hydrolyzing ATP. The addition of 0.1 mM of ARL-67156 inhibited 8-13.7% of the total ATP hydrolysis in MVs, suggesting that NTPDase1, NTPDase3, and/or NPP1 could also participate in ATP hydrolysis. Ouabain (3 mM) inhibited 3-8% of the total ATP hydrolysis by MVs, suggesting that NKA contributed only a small percentage of the total ATP hydrolysis. MVs induced mineralization via ATP hydrolysis that was significantly inhibited by Levamisole and also by cleaving TNAP from MVs, confirming that TNAP is the main enzyme hydrolyzing this substrate, while the addition of either ARL-6715 or ouabain had a lesser effect on mineralization. DPPC:DPPE (1:1)-NKA liposome in the presence of a nucleator (PS-CPLX) was more efficient in mineralizing compared with a DPPC-NKA liposome due to a better orientation of the NKA active site. Both types of proteoliposomes were able to induce apatite formation, as evidenced by the presence of the 1040 cm-1 band. Taken together, the findings indicated that the hydrolysis of ATP was dominated by TNAP and other phosphatases present in MVs, while only 3-8% of the total hydrolysis of ATP could be attributed to NKA. It was hypothesized that the loss of Na/K asymmetry in MVs could be caused by a complete depletion of ATP inside MVs, impairing the maintenance of symmetry by NKA. Our study carried out on NKA-liposomes confirmed that NKA could contribute to mineral formation inside MVs, which might complement the known action of PHOSPHO1 in the MV lumen.
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Affiliation(s)
- Heitor Gobbi Sebinelli
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Ribeirão Preto, São Paulo 14040-900, Brazil
| | - Luiz Henrique Silva Andrilli
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Ribeirão Preto, São Paulo 14040-900, Brazil
| | - Bruno Zoccaratto Favarin
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Ribeirão Preto, São Paulo 14040-900, Brazil
| | - Marcos Aantonio Eufrasio Cruz
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Ribeirão Preto, São Paulo 14040-900, Brazil
| | - Maytê Bolean
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Ribeirão Preto, São Paulo 14040-900, Brazil
| | - Michele Fiore
- University Lyon, Université. Claude Bernard Lyon 1, CNRS UMR 5246, ICBMS, F-69622 Lyon, France
| | - Carolina Chieffo
- University Lyon, Université. Claude Bernard Lyon 1, CNRS UMR 5246, ICBMS, F-69622 Lyon, France
| | - David Magne
- University Lyon, Université. Claude Bernard Lyon 1, CNRS UMR 5246, ICBMS, F-69622 Lyon, France
| | - Andrea Magrini
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Ana Paula Ramos
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Ribeirão Preto, São Paulo 14040-900, Brazil
| | | | - Saida Mebarek
- University Lyon, Université. Claude Bernard Lyon 1, CNRS UMR 5246, ICBMS, F-69622 Lyon, France
| | - Rene Buchet
- University Lyon, Université. Claude Bernard Lyon 1, CNRS UMR 5246, ICBMS, F-69622 Lyon, France
| | - Massimo Bottini
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Ribeirão Preto, São Paulo 14040-900, Brazil
- Department of Experimental Medicine, University of Rome Tor Vergata, 00133 Rome, Italy
- Correspondence: (M.B.); (P.C.)
| | - Pietro Ciancaglini
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Ribeirão Preto, São Paulo 14040-900, Brazil
- Department of Experimental Medicine, University of Rome Tor Vergata, 00133 Rome, Italy
- Correspondence: (M.B.); (P.C.)
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Veschi EA, Bolean M, da Silva Andrilli LH, Sebinelli HG, Strzelecka-Kiliszek A, Bandorowicz-Pikula J, Pikula S, Granjon T, Mebarek S, Magne D, Millán JL, Ramos AP, Buchet R, Bottini M, Ciancaglini P. Mineralization Profile of Annexin A6-Harbouring Proteoliposomes: Shedding Light on the Role of Annexin A6 on Matrix Vesicle-Mediated Mineralization. Int J Mol Sci 2022; 23:ijms23168945. [PMID: 36012211 PMCID: PMC9409191 DOI: 10.3390/ijms23168945] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 08/03/2022] [Accepted: 08/09/2022] [Indexed: 11/16/2022] Open
Abstract
The biochemical machinery involved in matrix vesicles-mediated bone mineralization involves a specific set of lipids, enzymes, and proteins. Annexins, among their many functions, have been described as responsible for the formation and stabilization of the matrix vesicles′ nucleational core. However, the specific role of each member of the annexin family, especially in the presence of type-I collagen, remains to be clarified. To address this issue, in vitro mineralization was carried out using AnxA6 (in solution or associated to the proteoliposomes) in the presence or in the absence of type-I collagen, incubated with either amorphous calcium phosphate (ACP) or a phosphatidylserine-calcium phosphate complex (PS–CPLX) as nucleators. Proteoliposomes were composed of 1,2-dipalmitoylphosphatidylcholine (DPPC), 1,2-dipalmitoylphosphatidylcholine: 1,2-dipalmitoylphosphatidylserine (DPPC:DPPS), and DPPC:Cholesterol:DPPS to mimic the outer and the inner leaflet of the matrix vesicles membrane as well as to investigate the effect of the membrane fluidity. Kinetic parameters of mineralization were calculated from time-dependent turbidity curves of free Annexin A6 (AnxA6) and AnxA6-containing proteoliposomes dispersed in synthetic cartilage lymph. The chemical composition of the minerals formed was investigated by Fourier transform infrared spectroscopy (FTIR). Free AnxA6 and AnxA6-proteoliposomes in the presence of ACP were not able to propagate mineralization; however, poorly crystalline calcium phosphates were formed in the presence of PS–CPLX, supporting the role of annexin-calcium-phosphatidylserine complex in the formation and stabilization of the matrix vesicles’ nucleational core. We found that AnxA6 lacks nucleation propagation capacity when incorporated into liposomes in the presence of PS–CPLX and type-I collagen. This suggests that AnxA6 may interact either with phospholipids, forming a nucleational core, or with type-I collagen, albeit less efficiently, to induce the nucleation process.
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Affiliation(s)
- Ekeveliny Amabile Veschi
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Ribeirão Preto 14040-901, SP, Brazil
| | - Maytê Bolean
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Ribeirão Preto 14040-901, SP, Brazil
| | - Luiz Henrique da Silva Andrilli
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Ribeirão Preto 14040-901, SP, Brazil
| | - Heitor Gobbi Sebinelli
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Ribeirão Preto 14040-901, SP, Brazil
| | | | | | - Slawomir Pikula
- Nencki Institute of Experimental Biology, 3 Pasteur Street, 02-093 Warsaw, Poland
| | - Thierry Granjon
- University of Lyon, University Claude Bernard Lyon 1, CNRS UMR 5246, ICBMS, F-69622 Lyon, France
| | - Saida Mebarek
- University of Lyon, University Claude Bernard Lyon 1, CNRS UMR 5246, ICBMS, F-69622 Lyon, France
| | - David Magne
- University of Lyon, University Claude Bernard Lyon 1, CNRS UMR 5246, ICBMS, F-69622 Lyon, France
| | | | - Ana Paula Ramos
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Ribeirão Preto 14040-901, SP, Brazil
| | - Rene Buchet
- University of Lyon, University Claude Bernard Lyon 1, CNRS UMR 5246, ICBMS, F-69622 Lyon, France
| | - Massimo Bottini
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Ribeirão Preto 14040-901, SP, Brazil
- Department of Experimental Medicine, University of Rome Tor Vergata, 00133 Rome, Italy
- Correspondence: (M.B.); (P.C.); Tel.: +55-16-3315-3753 (P.C.); Fax: +55-16-3315-4838 (P.C.)
| | - Pietro Ciancaglini
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Ribeirão Preto 14040-901, SP, Brazil
- Department of Experimental Medicine, University of Rome Tor Vergata, 00133 Rome, Italy
- Correspondence: (M.B.); (P.C.); Tel.: +55-16-3315-3753 (P.C.); Fax: +55-16-3315-4838 (P.C.)
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Yue D, Du L, Zhang B, Wu H, Yang Q, Wang M, Pan J. Time-dependently Appeared Microenvironmental Changes and Mechanism after Cartilage or Joint Damage and the Influences on Cartilage Regeneration. Organogenesis 2021; 17:85-99. [PMID: 34806543 DOI: 10.1080/15476278.2021.1991199] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Cartilage and joint damage easily degenerates cartilage and turns into osteoarthritis (OA), which seriously affects human life and work, and has no cure currently. The temporal and spatial changes of multiple microenvironments upon the damage of cartilage and joint are noticed, including the emergences of inflammation, bone remodeling, blood vessels, and nerves, as well as alterations of extracellular and pericellular matrix, oxygen tension, biomechanics, underneath articular cartilage tissues, and pH value. This review summarizes the existing literatures on microenvironmental changes, mechanisms, and their negative effects on cartilage regeneration following cartilage and joint damage. We conclude that time-dependently rebuilding the multiple normal microenvironments of damaged cartilage is the key for cartilage regeneration after systematic studies for the timing and correlations of various microenvironment changes.
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Affiliation(s)
- Danyang Yue
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, Bioengineering College, Chongqing University, Chongqing, PR China
| | - Lin Du
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, Bioengineering College, Chongqing University, Chongqing, PR China
| | - Bingbing Zhang
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, Bioengineering College, Chongqing University, Chongqing, PR China
| | - Huan Wu
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, Bioengineering College, Chongqing University, Chongqing, PR China
| | - Qiong Yang
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, Bioengineering College, Chongqing University, Chongqing, PR China
| | - Min Wang
- Orthopedic Department, Xinqiao Hospital, Army Medical University, Chongqing, PR China
| | - Jun Pan
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, Bioengineering College, Chongqing University, Chongqing, PR China
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Nourisa J, Zeller-Plumhoff B, Helmholz H, Luthringer-Feyerabend B, Ivannikov V, Willumeit-Römer R. Magnesium ions regulate mesenchymal stem cells population and osteogenic differentiation: A fuzzy agent-based modeling approach. Comput Struct Biotechnol J 2021; 19:4110-4122. [PMID: 34527185 PMCID: PMC8346546 DOI: 10.1016/j.csbj.2021.07.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 07/05/2021] [Accepted: 07/07/2021] [Indexed: 12/17/2022] Open
Abstract
Mesenchymal stem cells (MSCs) are proliferative and multipotent cells that play a key role in the bone regeneration process. Empirical data have repeatedly shown the bioregulatory importance of magnesium (Mg) ions in MSC growth and osteogenesis. In this study, we propose an agent-based model to predict the spatiotemporal dynamics of the MSC population and osteogenic differentiation in response to Mg2+ ions. A fuzzy-logic controller was designed to govern the decision-making process of cells by predicting four cellular processes of proliferation, differentiation, migration, and mortality in response to several important bioregulatory factors such as Mg2+ ions, pH, BMP2, and TGF-β1. The model was calibrated using the empirical data obtained from three sets of cell culture experiments. The model successfully reproduced the empirical observations regarding live cell count, viability, DNA content, and the differentiation-related markers of alkaline phosphate (ALP) and osteocalcin (OC). The simulation results, in agreement with the empirical data, showed that Mg2+ ions within 3-6 mM concentration have the highest stimulation effect on cell population growth. The model also correctly reproduced the stimulatory effect of Mg2+ ions on ALP and its inhibitory effect on OC as the early and late differentiation markers, respectively. Besides, the numerical simulation shed light on the innate cellular differences of the cells cultured in different experiments in terms of the proliferative capacity as well as sensitivity to Mg2+ ions. The proposed model can be adopted in the study of the osteogenesis around Mg-based implants where ions released due to degradation interact with local cells and regulate bone regeneration.
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Affiliation(s)
- Jalil Nourisa
- Helmholtz Zentrum Hereon, Institute of Metallic Biomaterials, Max-Planck-Straße 1, 21502 Geesthacht, Germany
| | - Berit Zeller-Plumhoff
- Helmholtz Zentrum Hereon, Institute of Metallic Biomaterials, Max-Planck-Straße 1, 21502 Geesthacht, Germany
| | - Heike Helmholz
- Helmholtz Zentrum Hereon, Institute of Metallic Biomaterials, Max-Planck-Straße 1, 21502 Geesthacht, Germany
| | | | - Vladimir Ivannikov
- Helmholtz Zentrum Hereon, Institute of Metallic Biomaterials, Max-Planck-Straße 1, 21502 Geesthacht, Germany
| | - Regine Willumeit-Römer
- Helmholtz Zentrum Hereon, Institute of Metallic Biomaterials, Max-Planck-Straße 1, 21502 Geesthacht, Germany
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Miyamoto S, Yoshikawa H, Nakata K. Axial mechanical loading to ex vivo mouse long bone regulates endochondral ossification and endosteal mineralization through activation of the BMP-Smad pathway during postnatal growth. Bone Rep 2021; 15:101088. [PMID: 34141832 PMCID: PMC8188257 DOI: 10.1016/j.bonr.2021.101088] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 03/19/2021] [Accepted: 05/01/2021] [Indexed: 01/12/2023] Open
Abstract
Mechanical loading contributes to bone development, growth, and metabolism. However, the mechanisms underlying long bone mineralization via changes in loading during the growth period are unclear. The aim of the present study was to investigate the regulatory mechanisms underlying endochondral ossification and endosteal mineralization by developing an ex vivo organ culture model with cyclic axial mechanical loads. The metacarpal bones of 3-week-old C57BL/6 mice were exposed to mechanical loading (0, 7.8, and 78 mN) for 1 h/day for 4 days. Histomorphometry revealed that axial mechanical loading regulated the thickness of the calcified zone in the growth plate and endosteal mineralization in the diaphysis in a load-dependent manner. Mechanical loading also resulted in load-dependent upregulation of endochondral ossification and bone mineralization-related genes, including bone morphogenetic protein 2 (Bmp2). Recombinant human BMP-2 administration caused similar changes in tissue structures. Conversely, inhibition of the BMP-Smad pathway diminished the stimulatory effects of mechanical loading and BMP-2 administration, suggesting that the effects of mechanical loading may be exerted through activation of the BMP-Smad pathway with the results of gene ontology and pathway analyses. Mechanical loading increased alkaline phosphatase activity and decreased carbonic anhydrase IX (Car9) mRNA expression, resulting in a significant pH increase in the culture supernatant. We hypothesize that, through activation of the BMP-Smad pathway, mechanical loading downregulates Car9, which may alkalize the local milieu, thereby inducing bone formation and long bone mineralization. Our results showed that cyclic axial mechanical loading increased endochondral ossification and endosteal mineralization in developing mouse long bones, which may have resulted from changes in the pH, ALP activity, and Pi/PPi of the extracellular environment. These findings advance our understanding of the regulation of mineralization mechanisms by mechanical loading mediated through activation of the BMP-Smad pathway.
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Affiliation(s)
- Satoshi Miyamoto
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Hideki Yoshikawa
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Ken Nakata
- Medicine for Sports and Performing Arts, Department of Health and Sport Sciences, Osaka University Graduate School of Medicine, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
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Determination of Adenylate Nucleotides in Amphipod Gammarus fossarum by Ion-Pair Reverse Phase Liquid Chromatography: Possibilities of Positive Pressure Micro-Solid Phase Extraction. SEPARATIONS 2021. [DOI: 10.3390/separations8020020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Adenine nucleotides—adenosine monophosphate, diphosphate, and triphosphate—are of utmost importance to all living organisms, where they play a critical role in the energy metabolism and are tied to allosteric regulation in various regulatory enzymes. Adenylate energy charge represents the precise relationship between the concentrations of adenosine monophosphate, diphosphate, and triphosphate and indicates the amount of metabolic energy available to an organism. The experimental conditions of adenylate extraction in freshwater amphipod Gammarus fossarum are reported here for the first time and are crucial for the qualitative and quantitative determination of adenylate nucleotides using efficient and sensitive ion-pair reverse phase LC. It was shown that amphipod calcified exoskeleton impeded the neutralization of homogenate. The highest adenylate yield was obtained by homogenization in perchloric acid and subsequent addition of potassium hydroxide and phosphate buffer to achieve a pH around 11. This method enables separation and accurate detection of adenylates. Our study provides new insight into the complexity of adenylate extraction and quantification that is crucial for the application of adenylate energy charge as a confident physiological measure of environmental stress and as a health index of G. fossarum.
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TNAP as a New Player in Chronic Inflammatory Conditions and Metabolism. Int J Mol Sci 2021; 22:ijms22020919. [PMID: 33477631 PMCID: PMC7831495 DOI: 10.3390/ijms22020919] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 01/14/2021] [Accepted: 01/14/2021] [Indexed: 12/19/2022] Open
Abstract
This review summarizes important information on the ectoenzyme tissue-nonspecific alkaline phosphatase (TNAP) and gives a brief insight into the symptoms, diagnostics, and treatment of the rare disease Hypophosphatasia (HPP), which is resulting from mutations in the TNAP encoding ALPL gene. We emphasize the role of TNAP beyond its well-known contribution to mineralization processes. Therefore, above all, the impact of the enzyme on central molecular processes in the nervous system and on inflammation is presented here.
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Tissue-Nonspecific Alkaline Phosphatase-A Gatekeeper of Physiological Conditions in Health and a Modulator of Biological Environments in Disease. Biomolecules 2020; 10:biom10121648. [PMID: 33302551 PMCID: PMC7763311 DOI: 10.3390/biom10121648] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 11/30/2020] [Accepted: 12/05/2020] [Indexed: 12/15/2022] Open
Abstract
Tissue-nonspecific alkaline phosphatase (TNAP) is a ubiquitously expressed enzyme that is best known for its role during mineralization processes in bones and skeleton. The enzyme metabolizes phosphate compounds like inorganic pyrophosphate and pyridoxal-5′-phosphate to provide, among others, inorganic phosphate for the mineralization and transportable vitamin B6 molecules. Patients with inherited loss of function mutations in the ALPL gene and consequently altered TNAP activity are suffering from the rare metabolic disease hypophosphatasia (HPP). This systemic disease is mainly characterized by impaired bone and dental mineralization but may also be accompanied by neurological symptoms, like anxiety disorders, seizures, and depression. HPP characteristically affects all ages and shows a wide range of clinical symptoms and disease severity, which results in the classification into different clinical subtypes. This review describes the molecular function of TNAP during the mineralization of bones and teeth, further discusses the current knowledge on the enzyme’s role in the nervous system and in sensory perception. An additional focus is set on the molecular role of TNAP in health and on functional observations reported in common laboratory vertebrate disease models, like rodents and zebrafish.
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Favarin BZ, Bolean M, Ramos AP, Magrini A, Rosato N, Millán JL, Bottini M, Costa-Filho AJ, Ciancaglini P. Lipid composition modulates ATP hydrolysis and calcium phosphate mineral propagation by TNAP-harboring proteoliposomes. Arch Biochem Biophys 2020; 691:108482. [PMID: 32710882 DOI: 10.1016/j.abb.2020.108482] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 06/09/2020] [Accepted: 06/22/2020] [Indexed: 01/13/2023]
Abstract
Bone biomineralization is mediated by a special class of extracellular vesicles, named matrix vesicles (MVs), released by osteogenic cells. The MV membrane is enriched in sphingomyelin (SM), cholesterol (Chol) and tissue non-specific alkaline phosphatase (TNAP) compared with the parent cells' plasma membrane. TNAP is an ATP phosphohydrolase bound to cell and MV membranes via a glycosylphosphatidylinositol (GPI) anchor. Previous studies have shown that the lipid microenvironment influences the catalytic activity of enzymes incorporated into lipid bilayers. However, there is a lack of information about how the lipid microenvironment controls the ability of MV membrane-bound enzymes to induce mineral precipitation. Herein, we used TNAP-harboring proteoliposomes made of either pure dimyristoylphosphatidylcholine (DMPC) or DMPC mixed with either Chol, SM or both of them as MV biomimetic systems to evaluate how the composition modulates the lipid microenvironment and, in turn, TNAP incorporation into the lipid bilayer by means of calorimetry. These results were correlated with the proteoliposomes' catalytic activity and ability to induce the precipitation of amorphous calcium phosphate (ACP) in vitro. DMPC:SM proteoliposomes displayed the highest efficiency of mineral propagation, apparent affinity for ATP and substrate hydrolysis efficiency, which correlated with their highest degree of membrane organization (highest ΔH), among the tested proteoliposomes. Results obtained from turbidimetry and Fourier transformed infrared (FTIR) spectroscopy showed that the tested proteoliposomes induced ACP precipitation with the order DMPC:SM>DMPC:Chol:SM≈DMPC:Chol>DMPC which correlated with the lipid organization and the presence of SM in the proteoliposome membrane. Our study arises important insights regarding the physical properties and role of lipid organization in MV-mediated mineralization.
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Affiliation(s)
- B Z Favarin
- Department of Chemistry, FFCLRP, University of São Paulo, Ribeirão Preto, SP, Brazil; Department of Physics, FFCLRP, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - M Bolean
- Department of Chemistry, FFCLRP, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - A P Ramos
- Department of Chemistry, FFCLRP, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - A Magrini
- Department of Biopathology and Imaging Diagnostics, University of Rome Tor Vergata, Rome, Italy
| | - N Rosato
- Department of Experimental Medicine, University of Rome Tor Vergata, Rome, Italy
| | - J L Millán
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - M Bottini
- Department of Experimental Medicine, University of Rome Tor Vergata, Rome, Italy; Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA.
| | - A J Costa-Filho
- Department of Physics, FFCLRP, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - P Ciancaglini
- Department of Chemistry, FFCLRP, University of São Paulo, Ribeirão Preto, SP, Brazil.
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Abstract
Matrix mineralization can be divided into physiological mineralization and pathological mineralization. There is a consensus among existing studies that matrix vesicles (MVs) are the starting sites of bone mineralization, and each component of MVs serves a certain function in mineralization. In addition, ectopic MVs pathologically promote undesired calcification, the primary focus of which is the promotion of vascular calcification. However, the specific mechanisms of the actions of MVs in bone-vascular axis cross-talk have not been fully elucidated. This review summarizes the latest research in this field and explores the roles of MVs in the bone-vascular axis with the aim of generating new ideas for the prevention and treatment of vascular calcification and bone metabolic disease.
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Martineau C, Kaufmann M, Arabian A, Jones G, St-Arnaud R. Preclinical safety and efficacy of 24R,25-dihydroxyvitamin D 3 or lactosylceramide treatment to enhance fracture repair. J Orthop Translat 2020; 23:77-88. [PMID: 32518749 PMCID: PMC7270532 DOI: 10.1016/j.jot.2020.03.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 02/05/2020] [Accepted: 03/25/2020] [Indexed: 01/22/2023] Open
Abstract
Background/Objective Cyp24a1-null mice deficient in 24,25(OH)2D3 display impaired callus formation during the endochondral phase of bone fracture repair. The 24,25(OH)2D3 metabolite acted by binding to the TLC domain containing 3B isoform 2 (TLCD3B2, previously named FAM57B2) effector protein, which then synthesizes lactosylceramide (LacCer). Treatment with 24,25(OH)2D3 or LacCer restored callus size and mechanical properties in Cyp24a1-null mice. Methods To assess the safety of these molecules and test their efficacy for bone healing in wild-type, non-genetically modified mice, we treated 12-week-old, osteotomized C57BL/6 female mice with each compound for up to 21 days post-osteotomy. Control cohorts were injected with vehicle. Results Neither compound was found to exhibit any nephro- nor hepato-toxicity. Calcemia remained stable throughout the experiment and was unaffected by either treatment. Supplementation with 24,25(OH)2D3 increased circulating levels of this metabolite about 8-fold, decreased 1,25(OH)2D3 levels, and significantly increased circulating 1,24,25(OH)3D3 levels, suggesting 1?-hydroxylation of 24,25(OH)2D3. TLCD3B2 was found to be expressed in fracture callus at the surface of unmineralized or pre-mineralized cartilage on day 10 and day 12 post-osteotomy and to progressively recede to become undetectable by day 18. Treatment with 24,25(OH)2D3 or LacCer reduced the number of TLCD3B2-positive cells. Both treatments also significantly increased stiffness and elastic modulus of the healing bone callus. Conclusion Exogenous administration of 24,25(OH)2D3 or LacCer improved the biomechanical properties of repaired bones in wild-type animals without affecting circulating calcium levels or other blood parameters, demonstrating preclinical safety and efficacy. Translational potential Our data suggest the use of 24R,25-dihydroxyvitamin D3 or lactosylceramide for ameliorating fracture healing in clinical practice.
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Affiliation(s)
- Corine Martineau
- Research Centre, Shriners Hospitals for Children – Canada, Montreal, Quebec, H4A 0A9, Canada
| | - Martin Kaufmann
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, K7L 3N6, Canada
- Department of Surgery, Queen's University, Kingston, Ontario, K7L 3N6, Canada
| | - Alice Arabian
- Research Centre, Shriners Hospitals for Children – Canada, Montreal, Quebec, H4A 0A9, Canada
| | - Glenville Jones
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, K7L 3N6, Canada
| | - René St-Arnaud
- Research Centre, Shriners Hospitals for Children – Canada, Montreal, Quebec, H4A 0A9, Canada
- Department of Human Genetics, McGill University, Montreal, Quebec, H3A 1A1, Canada
- Department of Surgery, McGill University, Montreal, Quebec, H3A 1A1, Canada
- Department of Medicine, McGill University, Montreal, Quebec, H3A 1A1, Canada
- Research Institute of the McGill University Health Centre, Montreal, Quebec, H3H 2R9, Canada
- Corresponding author. Research Centre, Shriners Hospitals for Children – Canada, 1003 Decarie Boulevard, Montreal, Quebec, H4A 0A9, Canada.
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Vimalraj S. Alkaline phosphatase: Structure, expression and its function in bone mineralization. Gene 2020; 754:144855. [PMID: 32522695 DOI: 10.1016/j.gene.2020.144855] [Citation(s) in RCA: 309] [Impact Index Per Article: 77.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 06/03/2020] [Accepted: 06/03/2020] [Indexed: 12/16/2022]
Abstract
Alkaline phosphatase (ALP) is highly expressed in the cells of mineralized tissue and plays a critical function in the formation of hard tissue. The existing status of this critical enzyme should be reviewed periodically. ALP increases inorganic phosphate local rates and facilitates mineralization as well as reduces the extracellular pyrophosphate concentration, an inhibitor of mineral formation. Mineralization is the production, inside matrix vesicles, of hydroxyapatite crystals that bud from the outermembrane of hypertrophic osteoblasts and chondrocytes. The expansion of hydroxyapatite formsinto the extracellular matrix and its accumulation between collagen fibrils is observed. Among various isoforms, the tissue-nonspecific isozyme of ALP (TNAP) is strongly expressed in bone, liver and kidney and plays a key function in the calcification of bones. TNAP hydrolyzes pyrophosphate and supplies inorganic phosphate to enhance mineralization. The biochemical substrates of TNAP are believed to be inorganic pyrophosphate and pyridoxal phosphate. These substrates concentrate in TNAP deficient condition which results in hypophosphatasia. The increased level of ALP expression and development in this environment would undoubtedly provide new and essential information about the fundamental molecular mechanisms of bone formation, offer therapeutic possibilities for the management of bone-related diseases.
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Affiliation(s)
- Selvaraj Vimalraj
- Centre for Biotechnology, Anna University, Chennai 600 025, Tamil Nadu, India.
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Simão AMS, Bolean M, Favarin BZ, Veschi EA, Tovani CB, Ramos AP, Bottini M, Buchet R, Millán JL, Ciancaglini P. Lipid microenvironment affects the ability of proteoliposomes harboring TNAP to induce mineralization without nucleators. J Bone Miner Metab 2019; 37:607-613. [PMID: 30324534 PMCID: PMC6465158 DOI: 10.1007/s00774-018-0962-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 09/19/2018] [Indexed: 12/13/2022]
Abstract
Tissue-nonspecific alkaline phosphatase (TNAP), a glycosylphosphatidylinositol-anchored ectoenzyme present on the membrane of matrix vesicles (MVs), hydrolyzes the mineralization inhibitor inorganic pyrophosphate as well as ATP to generate the inorganic phosphate needed for apatite formation. Herein, we used proteoliposomes harboring TNAP as MV biomimetics with or without nucleators of mineral formation (amorphous calcium phosphate and complexes with phosphatidylserine) to assess the role of the MVs' membrane lipid composition on TNAP activity by means of turbidity assay and FTIR analysis. We found that TNAP-proteoliposomes have the ability to induce mineralization even in the absence of mineral nucleators. We also found that the addition of cholesterol or sphingomyelin to TNAP-proteoliposomes composed of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine reduced the ability of TNAP to induce biomineralization. Our results suggest that the lipid microenvironment is essential for the induction and propagation of minerals mediated by TNAP.
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Affiliation(s)
- Ana Maria Sper Simão
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Av. Bandeirantes 3900, Ribeirão Preto, SP, 14040-901, Brazil
| | - Maytê Bolean
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Av. Bandeirantes 3900, Ribeirão Preto, SP, 14040-901, Brazil
| | - Bruno Zoccaratto Favarin
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Av. Bandeirantes 3900, Ribeirão Preto, SP, 14040-901, Brazil
| | - Ekeveliny Amabile Veschi
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Av. Bandeirantes 3900, Ribeirão Preto, SP, 14040-901, Brazil
| | - Camila Bussola Tovani
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Av. Bandeirantes 3900, Ribeirão Preto, SP, 14040-901, Brazil
| | - Ana Paula Ramos
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Av. Bandeirantes 3900, Ribeirão Preto, SP, 14040-901, Brazil
| | - Massimo Bottini
- Department of Experimental Medicine and Surgery, University of Rome Tor Vergata, 00133, Rome, Italy
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, 92037, USA
| | - Rene Buchet
- UFR Chimie Biochimie, Universite Lyon 1, 69 622, Villeurbanne Cedex, France
- ICBMS, UMR 5246, CNRS, 69 622, Villeurbanne Cedex, France
- INSA, Lyon, 69 622, Villeurbanne Cedex, France
- CPE, Lyon, 69 622, Villeurbanne Cedex, France
- Universite de Lyon, 69 622, Villeurbanne Cedex, France
| | - José Luis Millán
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, 92037, USA
| | - Pietro Ciancaglini
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto da Universidade de São Paulo (FFCLRP-USP), Av. Bandeirantes 3900, Ribeirão Preto, SP, 14040-901, Brazil.
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Andrade MAR, Derradi R, Simão AMS, Millán JL, Ramos AP, Ciancaglini P, Bolean M. Is alkaline phosphatase biomimeticaly immobilized on titanium able to propagate the biomineralization process? Arch Biochem Biophys 2019; 663:192-198. [PMID: 30659801 DOI: 10.1016/j.abb.2019.01.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 01/07/2019] [Accepted: 01/14/2019] [Indexed: 12/25/2022]
Abstract
Tissue-nonspecific alkaline phosphatase (TNAP) is a key enzyme in the biomineralization process as it produces phosphate from a number of phospho-substrates stimulating mineralization while it also inactivates inorganic pyrophosphate, a potent mineralization inhibitor. We have previously reported on the reconstitution of TNAP on Langmuir monolayers as well as proteoliposomes. In the present study, thin films composed of dimyristoylphosphatidic acid (DMPA) were deposited on titanium supports by the Langmuir-Blodgett (LB) technique, and we determined preservation of TNAP's phosphohydrolytic activity after incorporation into the LB films. Increased mineralization was observed after exposing the supports containing the DMPA:TNAP LB films to solutions of phospho-substrates, thus evidencing the role of TNAP on the growth of calcium phosphates after immobilization. These coatings deposited on metallic supports can be potentially applied as osteoconductive materials, aiming at the optimization of bone-substitutes integration in vivo.
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Affiliation(s)
- Marco A R Andrade
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901, Ribeirão Preto, São Paulo, Brazil
| | - Rafael Derradi
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901, Ribeirão Preto, São Paulo, Brazil
| | - Ana M S Simão
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901, Ribeirão Preto, São Paulo, Brazil
| | - José Luis Millán
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, 92037, USA
| | - Ana P Ramos
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901, Ribeirão Preto, São Paulo, Brazil
| | - Pietro Ciancaglini
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901, Ribeirão Preto, São Paulo, Brazil
| | - Maytê Bolean
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901, Ribeirão Preto, São Paulo, Brazil.
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Itel F, Skovhus Thomsen J, Städler B. Matrix Vesicles-Containing Microreactors as Support for Bonelike Osteoblasts to Enhance Biomineralization. ACS APPLIED MATERIALS & INTERFACES 2018; 10:30180-30190. [PMID: 30113809 DOI: 10.1021/acsami.8b10886] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Therapeutic cell mimicry aims to provide a source of cell-like assemblies, which exhibit the core structural or functional properties of their natural counterparts with broad envisioned applications in biomedicine. Bone tissue engineering (BTE) aims at promoting and inciting the natural healing process of, for instance, critically sized bone defects. Microreactors designed to co-assemble with biological bone-forming osteoblasts like SaOS-2 cells to start biomineralization are reported for the first time. The alginate-based microparticles are equipped with active alkaline phosphatase-loaded artificial liposomes or SaOS-2-derived matrix vesicles (MVs). Spheroids assembled from SaOS-2 cells and microreactors not only exhibit higher cell viability, but also show enhanced biomineralization when MVs are present. The active biomineralization stimulation of the microreactors is illustrated by colorimetric calcium quantification and micro-computed tomography. These findings show the promising potential of applying cell mimicry in BTE.
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Affiliation(s)
- Fabian Itel
- Interdisciplinary Nanoscience Center (iNANO) , Aarhus University , Gustav Wieds Vej 14 , 8000 Aarhus , Denmark
| | - Jesper Skovhus Thomsen
- Department of Biomedicine , Aarhus University , Wilhelm Meyers Allé 3 , 8000 Aarhus , Denmark
| | - Brigitte Städler
- Interdisciplinary Nanoscience Center (iNANO) , Aarhus University , Gustav Wieds Vej 14 , 8000 Aarhus , Denmark
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Bottini M, Mebarek S, Anderson KL, Strzelecka-Kiliszek A, Bozycki L, Simão AMS, Bolean M, Ciancaglini P, Pikula JB, Pikula S, Magne D, Volkmann N, Hanein D, Millán JL, Buchet R. Matrix vesicles from chondrocytes and osteoblasts: Their biogenesis, properties, functions and biomimetic models. Biochim Biophys Acta Gen Subj 2018; 1862:532-546. [PMID: 29108957 PMCID: PMC5801150 DOI: 10.1016/j.bbagen.2017.11.005] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 10/28/2017] [Accepted: 11/01/2017] [Indexed: 01/01/2023]
Abstract
BACKGROUND Matrix vesicles (MVs) are released from hypertrophic chondrocytes and from mature osteoblasts, the cells responsible for endochondral and membranous ossification. Under pathological conditions, they can also be released from cells of non-skeletal tissues such as vascular smooth muscle cells. MVs are extracellular vesicles of approximately 100-300nm diameter harboring the biochemical machinery needed to induce mineralization. SCOPE OF THE REVIEW The review comprehensively delineates our current knowledge of MV biology and highlights open questions aiming to stimulate further research. The review is constructed as a series of questions addressing issues of MVs ranging from their biogenesis and functions, to biomimetic models. It critically evaluates experimental data including their isolation and characterization methods, like lipidomics, proteomics, transmission electron microscopy, atomic force microscopy and proteoliposome models mimicking MVs. MAJOR CONCLUSIONS MVs have a relatively well-defined function as initiators of mineralization. They bind to collagen and their composition reflects the composition of lipid rafts. We call attention to the as yet unclear mechanisms leading to the biogenesis of MVs, and how minerals form and when they are formed. We discuss the prospects of employing upcoming experimental models to deepen our understanding of MV-mediated mineralization and mineralization disorders such as the use of reconstituted lipid vesicles, proteoliposomes and, native sample preparations and high-resolution technologies. GENERAL SIGNIFICANCE MVs have been extensively investigated owing to their roles in skeletal and ectopic mineralization. MVs serve as a model system for lipid raft structures, and for the mechanisms of genesis and release of extracellular vesicles.
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Affiliation(s)
- Massimo Bottini
- University of Rome Tor Vergata, Department of Experimental Medicine and Surgery, 00133 Roma, Italy; Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Saida Mebarek
- Universite Lyon 1, UFR Chimie Biochimie, 69 622 Villeurbanne Cedex, France; ICBMS UMR 5246 CNRS, 69 622 Villeurbanne Cedex, France; INSA, Lyon, 69 622 Villeurbanne Cedex, France; CPE, Lyon, 69 622 Villeurbanne Cedex, France; Universite de Lyon, 69 622 Villeurbanne Cedex, France
| | - Karen L Anderson
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Agnieszka Strzelecka-Kiliszek
- Nencki Institute of Experimental Biology, Department of Biochemistry, Polish Academy of Sciences, 02-093 Warsaw, Poland
| | - Lukasz Bozycki
- Nencki Institute of Experimental Biology, Department of Biochemistry, Polish Academy of Sciences, 02-093 Warsaw, Poland
| | - Ana Maria Sper Simão
- Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, USP, Departamento de Química, 14040-901 Ribeirão Preto, SP, Brazil
| | - Maytê Bolean
- Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, USP, Departamento de Química, 14040-901 Ribeirão Preto, SP, Brazil
| | - Pietro Ciancaglini
- Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, USP, Departamento de Química, 14040-901 Ribeirão Preto, SP, Brazil
| | - Joanna Bandorowicz Pikula
- Nencki Institute of Experimental Biology, Department of Biochemistry, Polish Academy of Sciences, 02-093 Warsaw, Poland
| | - Slawomir Pikula
- Nencki Institute of Experimental Biology, Department of Biochemistry, Polish Academy of Sciences, 02-093 Warsaw, Poland
| | - David Magne
- Universite Lyon 1, UFR Chimie Biochimie, 69 622 Villeurbanne Cedex, France; ICBMS UMR 5246 CNRS, 69 622 Villeurbanne Cedex, France; INSA, Lyon, 69 622 Villeurbanne Cedex, France; CPE, Lyon, 69 622 Villeurbanne Cedex, France; Universite de Lyon, 69 622 Villeurbanne Cedex, France
| | - Niels Volkmann
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Dorit Hanein
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - José Luis Millán
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Rene Buchet
- Universite Lyon 1, UFR Chimie Biochimie, 69 622 Villeurbanne Cedex, France; ICBMS UMR 5246 CNRS, 69 622 Villeurbanne Cedex, France; INSA, Lyon, 69 622 Villeurbanne Cedex, France; CPE, Lyon, 69 622 Villeurbanne Cedex, France; Universite de Lyon, 69 622 Villeurbanne Cedex, France.
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Abstract
During the process of endochondral bone formation, chondrocytes and osteoblasts mineralize their extracellular matrix (ECM) by promoting the synthesis of hydroxyapatite (HA) seed crystals in the sheltered interior of membrane-limited matrix vesicles (MVs). Several lipid and proteins present in the membrane of the MVs mediate the interactions of MVs with the ECM and regulate the initial mineral deposition and posterior propagation. Among the proteins of MV membranes, ion transporters control the availability of phosphate and calcium needed for initial HA deposition. Phosphatases (orphan phosphatase 1, ectonucleotide pyrophosphatase/phosphodiesterase 1 and tissue-nonspecific alkaline phosphatase) play a crucial role in controlling the inorganic pyrophosphate/inorganic phosphate ratio that allows MV-mediated initiation of mineralization. The lipidic microenvironment can help in the nucleation process of first crystals and also plays a crucial physiological role in the function of MV-associated enzymes and transporters (type III sodium-dependent phosphate transporters, annexins and Na+/K+ ATPase). The whole process is mediated and regulated by the action of several molecules and steps, which make the process complex and highly regulated. Liposomes and proteoliposomes, as models of biological membranes, facilitate the understanding of lipid-protein interactions with emphasis on the properties of physicochemical and biochemical processes. In this review, we discuss the use of proteoliposomes as multiple protein carrier systems intended to mimic the various functions of MVs during the initiation and propagation of mineral growth in the course of biomineralization. We focus on studies applying biophysical tools to characterize the biomimetic models in order to gain an understanding of the importance of lipid-protein and lipid-lipid interfaces throughout the process.
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Effect of the presence of cholesterol in the interfacial microenvironment on the modulation of the alkaline phosphatase activity during in vitro mineralization. Colloids Surf B Biointerfaces 2017; 155:466-476. [PMID: 28472750 DOI: 10.1016/j.colsurfb.2017.04.051] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 04/20/2017] [Accepted: 04/25/2017] [Indexed: 01/17/2023]
Abstract
Mineralization of the skeleton starts within cell-derived matrix vesicles (MVs); then, minerals propagate to the extracellular collagenous matrix. Tissue-nonspecific alkaline phosphatase (TNAP) degrades inorganic pyrophosphate (PPi), a potent inhibitor of mineralization, and contributes Pi (Phosphate) from ATP to initiate mineralization. Compared to the plasma membrane, MVs are rich in Cholesterol (Chol) (∼32%) and TNAP, but how Chol influences TNAP activity remains unclear. We have reconstituted TNAP in liposomes of dipalmitoylphosphatidylcholine (DPPC) or dioleoylphosphatidylcholine (DOPC) combined with Chol or its derivatives Cholestenone (Achol) and Ergosterol (Ergo). DPPC plus 36% sterols in liposome increased the catalytic activity of TNAP toward ATP. The presence of Chol also increased the propagation of minerals by 3.4-fold. The catalytic efficiency of TNAP toward ATP was fourfold lower in DOPC proteoliposomes as compared to DPPC proteoliposomes. DOPC proteoliposomes also increased biomineralization by 2.8-fold as compared to DPPC proteoliposomes. TNAP catalyzed the hydrolysis of ATP more efficiently in the case of the proteoliposome consisting of DOPC with 36% Chol. The same behavior emerged with Achol and Ergo. The organization of the lipid and the structure of the sterol influenced the surface tension (γ), the TNAP phosphohydrolytic activity in the monolayer, and the TNAP catalytic efficiency in the bilayers. Membranes in the Lα phase (Achol) provided better kinetic parameters as compared to membranes in the Lo phase (Chol and Ergo). In conclusion, the physical properties and the lateral organization of lipids in proteoliposomes are crucial to control mineral propagation mediated by TNAP activity during mineralization.
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Carlson AK, McCutchen CN, June RK. Mechanobiological implications of articular cartilage crystals. Curr Opin Rheumatol 2017; 29:157-162. [DOI: 10.1097/bor.0000000000000368] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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22
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Cutarelli A, Marini M, Tancredi V, D'Arcangelo G, Murdocca M, Frank C, Tarantino U. Adenosine Triphosphate stimulates differentiation and mineralization in human osteoblast-like Saos-2 cells. Dev Growth Differ 2016; 58:400-8. [PMID: 27189526 DOI: 10.1111/dgd.12288] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 03/16/2016] [Accepted: 03/22/2016] [Indexed: 12/25/2022]
Abstract
In the last years adenosine triphosphate (ATP) and subsequent purinergic system activation through P2 receptors were investigated highlighting their pivotal role in bone tissue biology. In osteoblasts ATP can regulate several activities like cell proliferation, cell death, cell differentiation and matrix mineralization. Since controversial results exist, in this study we analyzed the ATP effects on differentiation and mineralization in human osteoblast-like Saos-2 cells. We showed for the first time the altered functional activity of ATP receptors. Despite that, we found that ATP can reduce cell proliferation and stimulate osteogenic differentiation mainly in the early stages of in vitro maturation as evidenced by the enhanced expression of alkaline phosphatase (ALP), Runt-related transcription factor 2 (Runx2) and Osteocalcin (OC) genes and by the increased ALP activity. Moreover, we found that ATP can affect mineralization in a biphasic manner, at low concentrations ATP always increases mineral deposition while at high concentrations it always reduces mineral deposition. In conclusion, we show the osteogenic effect of ATP on both early and late stage activities like differentiation and mineralization, for the first time in human osteoblastic cells.
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Affiliation(s)
- Alessandro Cutarelli
- Department of Orthopaedics and Traumatology, University Hospital Foundation, Policlinico Tor Vergata, Viale Oxford 81, Rome, 00133, Italy.,National Centre for Rare Diseases, Istituto Superiore di Sanità, Viale Regina Elena 299, Rome, 00161, Italy
| | - Mario Marini
- Department of Medicine of Systems, University of Rome Tor Vergata, Via Montpellier 1, Italy
| | - Virginia Tancredi
- Department of Medicine of Systems, University of Rome Tor Vergata, Via Montpellier 1, Italy
| | - Giovanna D'Arcangelo
- Department of Medicine of Systems, University of Rome Tor Vergata, Via Montpellier 1, Italy
| | - Michela Murdocca
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Via Montpellier 1, Rome, 00133, Italy
| | - Claudio Frank
- National Centre for Rare Diseases, Istituto Superiore di Sanità, Viale Regina Elena 299, Rome, 00161, Italy
| | - Umberto Tarantino
- Department of Orthopaedics and Traumatology, University Hospital Foundation, Policlinico Tor Vergata, Viale Oxford 81, Rome, 00133, Italy
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23
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Sebastian A, Frassetto LA. A neglected requirement for optimizing treatment of age-related osteoporosis: Replenishing the skeleton's base reservoir with net base-producing diets. Med Hypotheses 2016; 91:103-108. [PMID: 27142156 DOI: 10.1016/j.mehy.2016.04.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 04/13/2016] [Accepted: 04/15/2016] [Indexed: 10/21/2022]
Abstract
Osteoporosis is a disorder of bone in which the mass of the bone is reduced and the bone's architecture at the microscopic level is disordered. Together those abnormalities predispose affected individuals to experience fractures despite only minimal trauma (i.e., fragility fractures). Age related osteoporosis is a common type of osteoporosis that occurs with aging in both men and women usually beginning after the age of peak bone mass. Research has found that the disorder can be partially reversed by reducing the net amount of acid that is produced when consuming typical Western diets. However, the amelioration that results has not been so dramatic or so consistent that physicians have adopted the procedure as part of the standard treatment for age-related osteoporosis. We propose that reducing the net acid load from the diet is not sufficient to reverse age related osteoporosis because it fails to supply base needed to restore the large amount of base in bone that had been lost by reacting with the net acid load of the diet that had been consumed for years or decades. Reducing the net acid load from the diet might be expected to have little ameliorative effect or merely slow the progression of the disorder. We hypothesize that both to restore osteoporotic bone to, or nearly to, its pre-disease state, as well as to eliminate the risk of fragility fractures, requires consuming diets that produce net amounts of base to restore the base lost from years to decades of consuming diets that produce net amounts of acid. We hypothesize also that the excess base and attendant subclinical metabolic alkalosis will both stimulate the cellular process of bone formation and suppress the cellular process of bone resorption, and thereby implement the restorative process.
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Affiliation(s)
- Anthony Sebastian
- Department of Medicine, Division of Nephrology, University of California, San Francisco 94143, United States.
| | - Lynda A Frassetto
- Department of Medicine, Division of Nephrology, University of California, San Francisco 94143, United States
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24
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Zhang M, Wang H, Zhang J, Zhang H, Yang H, Wan X, Jing L, Lu L, Liu X, Yu S, Chang W, Wang M. Unilateral anterior crossbite induces aberrant mineral deposition in degenerative temporomandibular cartilage in rats. Osteoarthritis Cartilage 2016; 24:921-31. [PMID: 26746151 PMCID: PMC5699887 DOI: 10.1016/j.joca.2015.12.009] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 12/04/2015] [Accepted: 12/20/2015] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To investigate whether mechanical stress induces mineral deposits that contribute to matrix degradation at the onset of osteoarthritis (OA) in temporomandibular joint (TMJ) cartilage. DESIGN Female Spraguee-Dawley rats were subjected to an unilateral anterior crossbite (UAC) procedure. Histology, electron microscopy, and energy dispersive spectrometer (EDS) were used to examine cartilage matrix structures and composition of mineral deposit in the affected TMJ cartilage. Protein and/or RNA expression of phenotypic markers and mineralization modulators and matrix degradation was analyzed by immunohistochemistry and/or real-time PCR. Synthetic basic calcium phosphate (BCP) and calcium pyrophosphate dehydrate (CPPD) crystals were used to stimulate ATDC5 cells for their impact on cell differentiation and gene expression. RESULTS Fragmented and disorganized collagen fibers, expanded fibrous spaces, and enhancement of matrix vesicle production and mineral deposition were observed in matrices surrounding hypertrophic chondrocytes in cartilage as early as 2-weeks post-UAC and exacerbated with time. The mineral deposits in TMJ cartilage at 12- and 20-weeks post-UAC had Ca/P ratios of 1.42 and 1.44, which are similar to the ratios for BCP. The expression of mineralization inhibitors, NPP1, ANK, CD73, and Matrix gla protein (MGP) was decreased from 2 to 8 weeks post-UAC, so were the chondrogenic markers, Col-2, Col-X and aggrecan. In contrast, the expression of tissue-nonspecific alkaline phosphatase (TNAP) and MMP13 was increased 4-weeks post-UAC. Treating ADTC5 cells with BCP crystals increased MMPs and ADAMTS5 expression, but reduced matrix production in a time-dependent manner. CONCLUSION UAC induces deposition of BCP-like minerals in osteoarthritic cartilage, which can stimulate matrix degradation by promoting the expression of cartilage-degrading enzymes to facilitate OA progression.
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Affiliation(s)
- M. Zhang
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - H. Wang
- Department of Cardiology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - J. Zhang
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - H. Zhang
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - H. Yang
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - X. Wan
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - L. Jing
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - L. Lu
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - X. Liu
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - S. Yu
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - W. Chang
- Endocrine Research Unit, University of California, San Francisco, Veterans Affairs Medical Center, San Francisco, USA,Department of Medicine, University of California San Francisco, USA
| | - M. Wang
- State Key Laboratory of Military Stomatology, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, China,Address correspondence and reprint requests to: M. Wang, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, China. (M. Wang)
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25
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Fliefel R, Popov C, Tröltzsch M, Kühnisch J, Ehrenfeld M, Otto S. Mesenchymal stem cell proliferation and mineralization but not osteogenic differentiation are strongly affected by extracellular pH. J Craniomaxillofac Surg 2016; 44:715-24. [PMID: 27085985 DOI: 10.1016/j.jcms.2016.03.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 02/19/2016] [Accepted: 03/11/2016] [Indexed: 01/03/2023] Open
Abstract
UNLABELLED Osteomyelitis is a serious complication in oral and maxillofacial surgery affecting bone healing. Bone remodeling is not only controlled by cellular components but also by ionic and molecular composition of the extracellular fluids in which calcium phosphate salts are precipitated in a pH dependent manner. OBJECTIVE To determine the effect of pH on self-renewal, osteogenic differentiation and matrix mineralization of mesenchymal stem cells (MSCs). METHODS We selected three different pH values; acidic (6.3, 6.7), physiological (7.0-8.0) and severe alkaline (8.5). MSCs were cultured at different pH ranges, cell viability measured by WST-1, apoptosis detected by JC-1, senescence was analyzed by β-galactosidase whereas mineralization was detected by Alizarin Red and osteogenic differentiation analyzed by Real-time PCR. RESULTS Self-renewal was affected by pH as well as matrix mineralization in which pH other than physiologic inhibited the deposition of extracellular matrix but did not affect MSCs differentiation as osteoblast markers were upregulated. The expression of osteocalcin and alkaline phosphatase activity was upregulated whereas osteopontin was downregulated under acidic pH. CONCLUSION pH affected MSCs self-renewal and mineralization without influencing osteogenic differentiation. Thus, future therapies, based on shifting acid-base balance toward the alkaline direction might be beneficial for prevention or treatment of osteomyelitis.
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Affiliation(s)
- Riham Fliefel
- Experimental Surgery and Regenerative Medicine, Ludwig-Maximilians-University, Munich, Germany; Department of Oral and Maxillofacial Surgery, Ludwig-Maximilians-University, Munich, Germany; Department of Oral and Maxillofacial Surgery, Alexandria-University, Alexandria, Egypt.
| | - Cvetan Popov
- Experimental Surgery and Regenerative Medicine, Ludwig-Maximilians-University, Munich, Germany
| | - Matthias Tröltzsch
- Department of Oral and Maxillofacial Surgery, Ludwig-Maximilians-University, Munich, Germany
| | - Jan Kühnisch
- Department of Conservative Dentistry and Periodontology, Ludwig-Maximilians-University, Munich, Germany
| | - Michael Ehrenfeld
- Department of Oral and Maxillofacial Surgery, Ludwig-Maximilians-University, Munich, Germany
| | - Sven Otto
- Department of Oral and Maxillofacial Surgery, Ludwig-Maximilians-University, Munich, Germany
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Abstract
PURPOSE OF REVIEW Articular cartilage vesicles (ACVs) are small extracellular vesicles that serve as foci of pathologic calcium crystal deposition in articular cartilage matrix. In this review, I have summarized the role of ACVs in calcium crystal formation and discuss recent findings that impact our understanding of the content, behavior, and origin of ACVs in healthy and diseased joints. The burgeoning interest in extracellular vesicles in other fields renders this a timely and relevant topic. RECENT FINDINGS I have highlighted recent studies demonstrating that some ACVs originate in the autophagic pathway in healthy articular chondrocytes. I have reviewed accumulating evidence that nonmineralizing functions of ACVs contribute to osteoarthritis. I have also discussed new work supporting a role for extracellular vesicles in interleukin-1β-induced mineralization and in mediating the catabolic effects of synovial inflammation in osteoarthritis. SUMMARY We are making slow and steady progress in understanding the origin and function of ACVs and other relevant extracellular vesicles in arthritis. Further work in this interesting area is warranted.
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Affiliation(s)
- Ann K. Rosenthal
- Division of Rheumatology, Department of Medicine, Medical College of Wisconsin, USA
- Zablocki VA Medical Center, Milwaukee, Wisconsin, USA
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27
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Bolean M, Simão AMS, Kiffer-Moreira T, Hoylaerts MF, Millán JL, Itri R, Ciancaglini P. Proteoliposomes with the ability to transport Ca(2+) into the vesicles and hydrolyze phosphosubstrates on their surface. Arch Biochem Biophys 2015; 584:79-89. [PMID: 26325078 DOI: 10.1016/j.abb.2015.08.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 08/26/2015] [Accepted: 08/27/2015] [Indexed: 11/19/2022]
Abstract
We describe the production of stable DPPC and DPPC:DPPS-proteoliposomes harboring annexin V (AnxA5) and tissue-nonspecific alkaline phosphatase (TNAP) and their use to investigate whether the presence of AnxA5 impacts the kinetic parameters for hydrolysis of TNAP substrates at physiological pH. The best catalytic efficiency was achieved in DPPS 10%-proteoliposomes (molar ratio), conditions that also increased the specificity of TNAP hydrolysis of PPi. Melting behavior of liposomes and proteoliposomes was analyzed via differential scanning calorimetry. The presence of 10% DPPS in DPPC-liposomes causes a broadening of the transition peaks, with AnxA5 and TNAP promoting a decrease in ΔH values. AnxA5 was able to mediate Ca(2+)-influx into the DPPC and DPPC:DPPS 10%-vesicles at physiological Ca(2+) concentrations (∼2 mM). This process was not affected by the presence of TNAP in the proteoliposomes. However, AnxA5 significantly affects the hydrolysis of TNAP substrates. Studies with GUVs confirmed the functional reconstitution of AnxA5 in the mimetic systems. These proteoliposomes are useful as mimetics of mineralizing cell-derived matrix vesicles, known to be responsible for the initiation of endochondral ossification, as they successfully transport Ca(2+) and possess the ability to hydrolyze phosphosubstrates in the lipid-water interface.
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Affiliation(s)
- Maytê Bolean
- Depto. Química, FFCLRP-USP, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Ana Maria S Simão
- Depto. Química, FFCLRP-USP, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Tina Kiffer-Moreira
- Sanford Children's Health Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Marc F Hoylaerts
- Department of Cardiovascular Sciences, Center for Molecular and Vascular Biology, University of Leuven, Leuven, Belgium
| | - José Luis Millán
- Sanford Children's Health Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Rosangela Itri
- Depto. Física Aplicada, Instituto de Física, IF-USP, São Paulo, SP, Brazil
| | - Pietro Ciancaglini
- Depto. Química, FFCLRP-USP, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
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28
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Wang L, Tonggu L. Membrane protein reconstitution for functional and structural studies. SCIENCE CHINA-LIFE SCIENCES 2015; 58:66-74. [PMID: 25576454 DOI: 10.1007/s11427-014-4769-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Accepted: 10/27/2014] [Indexed: 10/24/2022]
Abstract
Membrane proteins are involved in various critical biological processes, and studying membrane proteins represents a major challenge in protein biochemistry. As shown by both structural and functional studies, the membrane environment plays an essential role for membrane proteins. In vitro studies are reliant on the successful reconstitution of membrane proteins. This review describes the interaction between detergents and lipids that aids the understanding of the reconstitution processes. Then the techniques of detergent removal and a few useful techniques to refine the formed proteoliposomes are reviewed. Finally the applications of reconstitution techniques to study membrane proteins involved in Ca(2+) signaling are summarized.
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Affiliation(s)
- LiGuo Wang
- Department of Biological Structure, University of Washington, Seattle, Washington, 98195, USA,
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29
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Nowak LG, Rosay B, Czégé D, Fonta C. Tetramisole and Levamisole Suppress Neuronal Activity Independently from Their Inhibitory Action on Tissue Non-specific Alkaline Phosphatase in Mouse Cortex. Subcell Biochem 2015. [PMID: 26219715 DOI: 10.1007/978-94-017-7197-9_12] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Tissue non-specific alkaline phosphatase (TNAP) may be involved in the synthesis of GABA and adenosine, which are the main inhibitory neurotransmitters in cortex. We explored this putative TNAP function through electrophysiological recording (local field potential ) in slices of mouse somatosensory cortex maintained in vitro. We used tetramisole, a well documented TNAP inhibitor, to block TNAP activity. We expected that inhibiting TNAP with tetramisole would lead to an increase of neuronal response amplitude, owing to a diminished availability of GABA and/or adenosine. Instead, we found that tetramisole reduced neuronal response amplitude in a dose-dependent manner. Tetramisole also decreased axonal conduction velocity. Levamisole had identical effects. Several control experiments demonstrated that these actions of tetramisole were independent from this compound acting on TNAP. In particular, tetramisole effects were not stereo-specific and they were not mimicked by another inhibitor of TNAP, MLS-0038949. The decrease of axonal conduction velocity and preliminary intracellular data suggest that tetramisole blocks voltage-dependent sodium channels. Our results imply that levamisole or tetramisole should not be used with the sole purpose of inhibiting TNAP in living excitable cells as it will also block all processes that are activity-dependent. Our data and a review of the literature indicate that tetramisole may have at least four different targets in the nervous system. We discuss these results with respect to the neurological side effects that were observed when levamisole and tetramisole were used for medical purposes, and that may recur nowadays due to the recent use of levamisole and tetramisole as cocaine adulterants.
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Affiliation(s)
- Lionel G Nowak
- Centre de Recherche Cerveau et Cognition (CerCo), Université de Toulouse UPS; CNRS UMR 5549 , Toulouse, France,
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