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Feng Y, Dang X, Zheng P, Liu Y, Liu D, Che Z, Yao J, Lin Z, Liao Z, Nie X, Liu F, Zhang Y. Quercetin in Osteoporosis Treatment: A Comprehensive Review of Its Mechanisms and Therapeutic Potential. Curr Osteoporos Rep 2024; 22:353-365. [PMID: 38652430 DOI: 10.1007/s11914-024-00868-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/24/2024] [Indexed: 04/25/2024]
Abstract
PURPOSE OF REVIEW This review aims to provide a theoretical basis and insights for quercetin's clinical application in the prevention and treatment of osteoporosis (OP), analyzing its roles in bone formation promotion, bone resorption inhibition, anti-inflammation, antioxidant effects, and potential mechanisms. RECENT FINDINGS OP, a prevalent bone disorder, is marked by reduced bone mineral density and impaired bone architecture, elevating the risk of fractures in patients. The primary approach to OP management is pharmacotherapy, with quercetin, a phytochemical compound, emerging as a focus of recent interest. This natural flavonoid exerts regulatory effects on bone marrow mesenchymal stem cells, osteoblasts, and osteoclasts and promotes bone health and metabolic equilibrium via anti-inflammatory and antioxidative pathways. Although quercetin has demonstrated significant potential in regulating bone metabolism, there is a need for further high-quality clinical studies focused on medicinal quercetin.
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Affiliation(s)
- Yanchen Feng
- Hospital of Encephalopathy, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, 450099, China
- Traditional Chinese Medicine (Zhong Jing) School, Henan University of Chinese Medicine, Zhengzhou, 450046, China
| | - Xue Dang
- Traditional Chinese Medicine (Zhong Jing) School, Henan University of Chinese Medicine, Zhengzhou, 450046, China
| | - Pan Zheng
- Traditional Chinese Medicine (Zhong Jing) School, Henan University of Chinese Medicine, Zhengzhou, 450046, China
| | - Yali Liu
- Traditional Chinese Medicine (Zhong Jing) School, Henan University of Chinese Medicine, Zhengzhou, 450046, China
| | - Diyan Liu
- Traditional Chinese Medicine (Zhong Jing) School, Henan University of Chinese Medicine, Zhengzhou, 450046, China
| | - Zhiying Che
- Traditional Chinese Medicine (Zhong Jing) School, Henan University of Chinese Medicine, Zhengzhou, 450046, China
| | - Jianping Yao
- Traditional Chinese Medicine (Zhong Jing) School, Henan University of Chinese Medicine, Zhengzhou, 450046, China
| | - Zixuan Lin
- Hospital of Encephalopathy, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, 450099, China
| | - Ziyun Liao
- College of Acupuncture, Moxibustion and Tuina, Henan University of Chinese Medicine, Zhengzhou, 450046, China
| | - Xingyuan Nie
- School of Medicine, Henan University of Chinese Medicine, Zhengzhou, 450046, China
| | - Feixiang Liu
- Hospital of Encephalopathy, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, 450099, China.
| | - Yunke Zhang
- School of Rehabilitation Medicine, Henan University of Chinese Medicine, Zhengzhou, 450003, China.
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Elli FM, Mattinzoli D, Ikehata M, Bagnaresi F, Maffini MA, Del Sindaco G, Pagnano A, Lucca C, Messa P, Arosio M, Castellano G, Alfieri CM, Mantovani G. Targeted silencing of GNAS in a human model of osteoprogenitor cells results in the deregulation of the osteogenic differentiation program. Front Endocrinol (Lausanne) 2024; 15:1296886. [PMID: 38828417 PMCID: PMC11140044 DOI: 10.3389/fendo.2024.1296886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 04/22/2024] [Indexed: 06/05/2024] Open
Abstract
Introduction The dysregulation of cell fate toward osteoprecursor cells associated with most GNAS-based disorders may lead to episodic de novo extraskeletal or ectopic bone formation in subcutaneous tissues. The bony lesion distribution suggests the involvement of abnormal differentiation of mesenchymal stem cells (MSCs) and/or more committed precursor cells. Data from transgenic mice support the concept that GNAS is a crucial factor in regulating lineage switching between osteoblasts (OBs) and adipocyte fates. The mosaic nature of heterotopic bone lesions suggests that GNAS genetic defects provide a sensitized background for ectopic osteodifferentiation, but the underlying molecular mechanism remains largely unknown. Methods The effect of GNAS silencing in the presence and/or absence of osteoblastic stimuli was evaluated in the human L88/5 MSC line during osteodifferentiation. A comparison of the data obtained with data coming from a bony lesion from a GNAS-mutated patient was also provided. Results Our study adds some dowels to the current fragmented notions about the role of GNAS during osteoblastic differentiation, such as the premature transition of immature OBs into osteocytes and the characterization of the differences in the deposed bone matrix. Conclusion We demonstrated that our cell model partially replicates the in vivo behavior results, resulting in an applicable human model to elucidate the pathophysiology of ectopic bone formation in GNAS-based disorders.
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Affiliation(s)
- Francesca Marta Elli
- Endocrinology Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Deborah Mattinzoli
- Department of Nephrology, Dialysis and Renal Transplantation, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Masami Ikehata
- Department of Nephrology, Dialysis and Renal Transplantation, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Francesca Bagnaresi
- Endocrinology Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Maria A. Maffini
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - Giulia Del Sindaco
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - Angela Pagnano
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - Camilla Lucca
- Endocrinology Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Piergiorgio Messa
- Department of Nephrology, Dialysis and Renal Transplantation, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan, Italy
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - Maura Arosio
- Endocrinology Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan, Italy
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - Giuseppe Castellano
- Department of Nephrology, Dialysis and Renal Transplantation, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan, Italy
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - Carlo M. Alfieri
- Department of Nephrology, Dialysis and Renal Transplantation, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan, Italy
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - Giovanna Mantovani
- Endocrinology Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan, Italy
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
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Zhang X, Xia Y, Xu J, Kang J, Li X, Li Y, Yan W, Tian F, Zhao B, Li B, Wang C, Wang L. Cell-free chitosan/silk fibroin/bioactive glass scaffolds with radial pore for in situ inductive regeneration of critical-size bone defects. Carbohydr Polym 2024; 332:121945. [PMID: 38431423 DOI: 10.1016/j.carbpol.2024.121945] [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: 11/01/2023] [Revised: 01/27/2024] [Accepted: 02/10/2024] [Indexed: 03/05/2024]
Abstract
Tissue-engineered is an effective method for repairing critical-size bone defects. The application of bioactive scaffold provides artificial matrix and suitable microenvironment for cell recruitment and extracellular matrix deposition, which can effectively accelerate the process of tissue regeneration. Among various scaffold properties, appropriate pore structure and distribution have been proven to play a crucial role in inducing cell infiltration differentiation and in-situ tissue regeneration. In this study, a chitosan (CS) /silk fibroin (SF) /bioactive glass (BG) composite scaffold with distinctive radially oriented pore structure was constructed. The composite scaffolds had stable physical and chemical properties, a unique pore structure of radial arrangement from the center to the periphery and excellent mechanical properties. In vitro biological studies indicated that the CS/SF/BG scaffold could promote osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) and the expression of related genes due to the wide range of connected pore structures and released active elements. Furthermore, in vivo study showed CS/SF/BG scaffold with radial pores was more conducive to the repair of skull defects in rats with accelerated healing speed during the bone tissue remodeling process. These results demonstrated the developed CS/SF/BG scaffold would be a promising therapeutic strategy for the repair of bone defects regeneration.
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Affiliation(s)
- Xinsong Zhang
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China; Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, China
| | - Yijing Xia
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China; Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, China
| | - Jie Xu
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China; Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, China
| | - Jie Kang
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China; Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, China
| | - Xiujuan Li
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China; Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, China
| | - Yuanjiao Li
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China; Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, China
| | - Wenpeng Yan
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China; Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, China
| | - Feng Tian
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China; Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, China
| | - Bin Zhao
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China; Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, China
| | - Bing Li
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China; Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, China.
| | - ChunFang Wang
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China; Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, China.
| | - Lu Wang
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China; Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, China.
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Deng T, Liu Q, Li Y, Zhu X, Long Y, Liu B, Pang J, Zhao L. PCAT-1' s role in wound healing impairment: Mitochondrial dysfunction and bone marrow stem cell differentiation inhibition via PKM2/β-catenin pathway and its impact on implant osseo-integration. Int Wound J 2024; 21:e14589. [PMID: 38135901 PMCID: PMC10961899 DOI: 10.1111/iwj.14589] [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: 11/29/2023] [Revised: 12/05/2023] [Accepted: 12/06/2023] [Indexed: 12/24/2023] Open
Abstract
This study focused on unravelling the role of PCAT-1 in wound-healing process, particularly its impact on regenerative and osteogenic abilities of mesenchymal stem cells (MSCs). We delved into how PCAT-1 regulates mitochondrial oxidative phosphorylation (OXPHOS) and interacts with pivotal molecular pathways, especially β-catenin and PKM2, using human bone marrow-derived MSCs. MSCs were cultured under specific conditions and PCAT-1 expression was modified through transfection. We thoroughly assessed several critical parameters: MSC proliferation, mitochondrial functionality, ATP production and expression of wound healing and osteogenic differentiation markers. Further, we evaluated alkaline phosphatase (ALP) activity and mineral deposition, essential for bone healing. Our findings revealed that overexpressing PCAT-1 significantly reduced MSC proliferation, hampered mitochondrial performance and lowered ATP levels, suggesting the clear inhibitory effect of PCAT-1 on these vital wound-healing processes. Additionally, PCAT-1 overexpression notably decreased ALP activity and calcium accumulation in MSCs, crucial for effective bone regeneration. This overexpression also led to the reduction in osteogenic marker expression, indicating suppression of osteogenic differentiation, essential in wound-healing scenarios. Moreover, our study uncovered a direct interaction between PCAT-1 and the PKM2/β-catenin pathway, where PCAT-1 overexpression intensified PKM2 activity while inhibiting β-catenin, thereby adversely affecting osteogenesis. This research thus highlights PCAT-1's significant role in impairing wound healing, offering insights into the molecular mechanisms that may guide future therapeutic strategies for enhancing wound repair and bone regeneration.
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Affiliation(s)
- Tianzheng Deng
- Department of StomatologyAirforce Medical Center PLA, Air Force Medical UniversityBeijingChina
| | - Qian Liu
- Department of StomatologyAirforce Medical Center PLA, Air Force Medical UniversityBeijingChina
| | - Ying Li
- Department of StomatologyAirforce Medical Center PLA, Air Force Medical UniversityBeijingChina
| | - Xiaoru Zhu
- Department of StomatologyAirforce Medical Center PLA, Air Force Medical UniversityBeijingChina
| | - Yunjing Long
- Department of StomatologyAirforce Medical Center PLA, Air Force Medical UniversityBeijingChina
| | - Bing Liu
- Department of StomatologyAirforce Medical Center PLA, Air Force Medical UniversityBeijingChina
| | - Jianliang Pang
- Department of StomatologyAirforce Medical Center PLA, Air Force Medical UniversityBeijingChina
| | - Lingzhou Zhao
- Department of StomatologyAirforce Medical Center PLA, Air Force Medical UniversityBeijingChina
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Tourkova IL, Larrouture QC, Liu S, Luo J, Schlesinger PH, Blair HC. The ecto-nucleotide pyrophosphatase/phosphodiesterase 2 promotes early osteoblast differentiation and mineralization in stromal stem cells. Am J Physiol Cell Physiol 2024; 326:C843-C849. [PMID: 38223929 PMCID: PMC11193479 DOI: 10.1152/ajpcell.00692.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/08/2024] [Accepted: 01/10/2024] [Indexed: 01/16/2024]
Abstract
The phosphodiesterase enzymes mediate calcium-phosphate deposition in various tissues, although which enzymes are active in bone mineralization is unclear. Using gene array analysis, we found that a member of ecto-nucleotide pyrophosphatase/phosphodiesterase family, ENPP2, was strongly down-regulated with age in stromal stem cells that produce osteoblasts and make bone. This is in keeping with reduced bone formation in older animals. Thus, we hypothesized that ENPP2 is, at least in part, an early mediator of bone formation and thus may reflect reduced bone formation with age. Since ENPP2 has not previously been shown to have a role in osteoblast differentiation, we studied its effect on bone differentiation from stromal stem cells, verified by flow cytometry for stem cell antigens. In these remarkably uniform osteoblast precursors, we did transfection with ENPP2 DsiRNA, scrambled DsiRNA, or no transfection to make cells with normal or greatly reduced ENPP2 and analyzed osteoblast differentiation and mineralization. Osteoblast differentiation down-regulation was shown by alizarin red binding, silver staining, and alkaline phosphatase activity. Differences were confirmed by real-time PCR for alkaline phosphatase (ALPL), osteocalcin (BGLAP), and ENPP2 and by Western Blot for Enpp2. These were decreased, ∼50%, in osteoblasts transfected with ENPP2 DsiRNA compared with cells transfected with a scrambled DsiRNA or not transfected (control) cells. This finding is the first evidence for the role of ENPP2 in osteoblast differentiation and mineralization.NEW & NOTEWORTHY We report the discovery that the ecto-nucleotide pyrophosphatase/phosphodiesterase, ENPP2, is an important regulator of early differentiation of bone-forming osteoblasts.
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Affiliation(s)
- Irina L Tourkova
- Research Service, VA Medical Centre, Pittsburgh, Pennsylvania, United States
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Quitterie C Larrouture
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Silvia Liu
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Jianhua Luo
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Paul H Schlesinger
- Department of Cell Biology, Washington University, St. Louis, Missouri, United States
| | - Harry C Blair
- Research Service, VA Medical Centre, Pittsburgh, Pennsylvania, United States
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
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Barik D, Shyamal S, Das K, Jena S, Dash M. Glycoprotein Injectable Hydrogels Promote Accelerated Bone Regeneration through Angiogenesis and Innervation. Adv Healthc Mater 2023; 12:e2301959. [PMID: 37712303 DOI: 10.1002/adhm.202301959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 08/27/2023] [Indexed: 09/16/2023]
Abstract
Glycoproteins are gaining prominence as multifunctional biomaterials. The study reports development of glycoprotein mucin as biomaterial promoting bone regeneration. Mucin 1 deletion has resulted in stiffer femoral bones with scarce presence of osteoblasts in trabecular linings and its role has been established in determining bone mass and mineralization. Limited information about its structure limits its processability, exploration as biomaterial, which is discussed in this study. The role of mucin in ECM (extracellular cellular matrix) formation validated by RNA sequencing analysis of human bone marrow derived mesenchymal stem cells is reported. The structure and stability of mucins is dependent on the presence of glycans in its structure. A thermosensitive hydrogel acquired from thermosensitive Poly (N-isopropyl acrylamide)-(PNIPAM) modified mucin and collagen is developed. The hydrogel demonstrates porous structure and mechanical strength. Newly formed bone tissue is observed at 8 weeks post-implantation in the hydrogel treated groups. The formation of blood vessels, nerves, and bone is observed with upregulation of angiopoietin (ANG), neurofilament heavy chain (NF-H), and osteoadherin (OSAD) or osteocalcin (OCN) respectively in rat calvarial defects. The outcome demonstrates that the thermosensitive injectable hydrogel accelerates repair and healing in calvarial bone defects making it a promising biodegradable biomaterial capable of regenerating bone by promoting angiogenesis and innervation.
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Affiliation(s)
- Debyashreeta Barik
- Therapeutics Biomaterials Team, Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
- School of Biotechnology, Kalinga Institute of Industrial Technology (KIIT) University, Bhubaneswar, Odisha, 751024, India
| | - Sharmistha Shyamal
- RNA Biology Lab, Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
| | - Kapilash Das
- Therapeutics Biomaterials Team, Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
| | - Sarita Jena
- Animal House Facility, DBT-Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
| | - Mamoni Dash
- Therapeutics Biomaterials Team, Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
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van der Flier A, Hong V, Liu Z, Piepenhagen P, Ulinski G, Dumont JA, Orcutt KD, Goel A, Peters R, Salas J. Biodistribution of recombinant factor IX, extended half-life recombinant factor IX Fc fusion protein, and glycoPEGylated recombinant factor IX in hemophilia B mice. Blood Coagul Fibrinolysis 2023; 34:353-363. [PMID: 37577860 PMCID: PMC10481914 DOI: 10.1097/mbc.0000000000001230] [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: 04/15/2022] [Revised: 03/01/2023] [Accepted: 04/26/2023] [Indexed: 08/15/2023]
Abstract
Extended half-life recombinant FIX (rFIX) molecules have been generated to reduce the dosing burden and increase the protection of patients with hemophilia B. Clinical pharmacology studies with recombinant factor IX Fc fusion protein (rFIXFc) report a similar initial peak plasma recovery to that of rFIX, but with a larger volume of distribution. Although the pegylation of N9-GP results in a larger plasma recovery, there is a smaller volume of distribution, suggesting less extravasation of the latter drug. In this study, we set out to compare the biodistribution and tissue localization of rFIX, rFIXFc, and glycoPEGylated rFIX in a hemophilia B mouse model. Radiolabeled rFIX, rFIXFc, and rFIX-GP were employed in in vivo single-photon emission computed tomography imaging (SPECT/CT), microautoradiography (MARG), and histology to assess the distribution of FIX reagents over time. Immediately following injection, vascularized tissues demonstrated intense signal irrespective of FIX reagent. rFIX and rFIXFc were retained in joint and muscle areas through 5 half-lives, unlike rFIX-GP (assessed by SPECT). MARG and immunohistochemistry showed FIX agents localized at blood vessels among tissues, including liver, spleen, and kidney. Microautoradiographs, as well as fluorescent-labeled images of knee joint areas, demonstrated retention over time of FIX signal at the trabecular area of bone. Data indicate that rFIXFc is similar to rFIX in that it distributes outside the plasma compartment and is retained in certain tissues over time, while also retained at higher plasma levels. Overall, data suggest that Fc fusion does not impede the extravascular distribution of FIX.
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Affiliation(s)
| | | | | | | | | | | | - Kelly D. Orcutt
- Invicro LLC, A Konica Minolta Company, Boston, Massachusetts, USA
| | - Apollina Goel
- Invicro LLC, A Konica Minolta Company, Boston, Massachusetts, USA
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Tourkova IL, Larrouture QC, Onwuka KM, Liu S, Luo J, Schlesinger PH, Blair HC. Age-related decline in bone mineral transport and bone matrix proteins in osteoblasts from stromal stem cells. Am J Physiol Cell Physiol 2023; 325:C613-C622. [PMID: 37519232 PMCID: PMC10635645 DOI: 10.1152/ajpcell.00227.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 07/20/2023] [Accepted: 07/20/2023] [Indexed: 08/01/2023]
Abstract
We studied osteoblast bone mineral transport and matrix proteins as a function of age. In isolated bone marrow cells from long bones of young (3 or 4 mo) and old (18 or 19 mo) mice, age correlated with reduced mRNA of mineral transport proteins: alkaline phosphatase (ALP), ankylosis (ANK), the Cl-/H+ exchanger ClC3, and matrix proteins collagen 1 (Col1) and osteocalcin (BGLAP). Some proteins, including the neutral phosphate transporter2 (NPT2), were not reduced. These are predominately osteoblast proteins, but in mixed cell populations. Remarkably, in osteoblasts differentiated from preparations of stromal stem cells (SSCs) made from bone marrow cells in young and old mice, differentiated in vitro on perforated polyethylene terephthalate membranes, mRNA confirmed decreased expression with age for most transport-related and bone matrix proteins. Additional mRNAs in osteoblasts in vitro included ecto-nucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1), unchanged, and ENPP2, reduced with age. Decrease with age in ALP activity and protein by Western blot was also significant. Transport protein findings correlated with micro-computed tomography of lumbar vertebra, showing that trabecular bone of old mice is osteopenic relative to young mice, consistent with other studies. Pathway analysis of osteoblasts differentiated in vitro showed that cells from old animals had reduced Erk1/2 phosphorylation and decreased suppressor of mothers against decapentaplegic 2 (Smad2) mRNA, consistent with TGFβ pathway, and reduced β-catenin mRNA, consistent with WNT pathway regulation. Our results show that decline in bone density with age reflects selective changes, resulting effectively in a phenotype modification. Reduction of matrix and mineral transport protein expression with age is regulated by multiple signaling pathways.NEW & NOTEWORTHY This work for the first time showed that specific enzymes in bone mineral transport, and matrix synthesis proteins, in the epithelial-like bone-forming cell layer are downregulated with aging. Results were compared using cells extracted from long bones of young and old mice, or in essentially uniform osteoblasts differentiated from stromal stem cells in vitro. The age effect showed memory in the stromal stem cells, a remarkable finding.
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Affiliation(s)
- Irina L Tourkova
- Research Service, VA Medical Center, Pittsburgh, Pennsylvania, United States
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Quitterie C Larrouture
- Research Service, VA Medical Center, Pittsburgh, Pennsylvania, United States
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Kelechi M Onwuka
- Research Service, VA Medical Center, Pittsburgh, Pennsylvania, United States
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Silvia Liu
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Jianhua Luo
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Paul H Schlesinger
- Department of Cell Biology & Physiology, Washington University in St. Louis, St. Louis, Missouri, United States
| | - Harry C Blair
- Research Service, VA Medical Center, Pittsburgh, Pennsylvania, United States
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
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Ungureanu E, Vladescu (Dragomir) A, Parau AC, Mitran V, Cimpean A, Tarcolea M, Vranceanu DM, Cotrut CM. In Vitro Evaluation of Ag- and Sr-Doped Hydroxyapatite Coatings for Medical Applications. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5428. [PMID: 37570133 PMCID: PMC10419960 DOI: 10.3390/ma16155428] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/12/2023] [Accepted: 07/30/2023] [Indexed: 08/13/2023]
Abstract
Osseointegration plays the most important role in the success of an implant. One of the applications of hydroxyapatite (HAp) is as a coating for metallic implants due to its bioactive nature, which improves osteoconduction. The purpose of this research was to assess the in vitro behavior of HAp undoped and doped with Ag and/or Sr obtained by galvanostatic pulsed electrochemical deposition. The coatings were investigated in terms of chemical bonds, contact angle and surface free energy, electrochemical behavior, in vitro biomineralization in acellular media (SBF and PBS), and biocompatibility with preosteoblasts cells (MC3T3-E1 cell line). The obtained results highlighted the beneficial impact of Ag and/or Sr on the HAp. The FTIR spectra confirmed the presence of hydroxyapatite within all coatings, while in terms of wettability, the contact angle and surface free energy investigations showed that all surfaces were hydrophilic. The in vitro behavior of MC3T3-E1 indicated that the presence of Sr in the HAp coatings as a unique doping agent or in combination with Ag elicited improved cytocompatibility in terms of cell proliferation and osteogenic differentiation. Therefore, the composite HAp-based coatings showed promising potential for bone regeneration applications.
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Affiliation(s)
- Elena Ungureanu
- Faculty of Materials Science and Engineering, University Politehnica of Bucharest, 313 Independentei Street, 060042 Bucharest, Romania; (E.U.); (M.T.)
| | - Alina Vladescu (Dragomir)
- Department for Advanced Surface Processing and Analysis by Vacuum Technologies, National Institute of Research and Development for Optoelectronics—INOE 2000, 409 Atomistilor Street, 77125 Magurele, Romania (A.C.P.)
| | - Anca C. Parau
- Department for Advanced Surface Processing and Analysis by Vacuum Technologies, National Institute of Research and Development for Optoelectronics—INOE 2000, 409 Atomistilor Street, 77125 Magurele, Romania (A.C.P.)
| | - Valentina Mitran
- Department of Biochemistry and Molecular Biology, University of Bucharest, 91-95 Independentei Street, 050095 Bucharest, Romania; (V.M.); (A.C.)
| | - Anisoara Cimpean
- Department of Biochemistry and Molecular Biology, University of Bucharest, 91-95 Independentei Street, 050095 Bucharest, Romania; (V.M.); (A.C.)
| | - Mihai Tarcolea
- Faculty of Materials Science and Engineering, University Politehnica of Bucharest, 313 Independentei Street, 060042 Bucharest, Romania; (E.U.); (M.T.)
| | - Diana M. Vranceanu
- Faculty of Materials Science and Engineering, University Politehnica of Bucharest, 313 Independentei Street, 060042 Bucharest, Romania; (E.U.); (M.T.)
| | - Cosmin M. Cotrut
- Faculty of Materials Science and Engineering, University Politehnica of Bucharest, 313 Independentei Street, 060042 Bucharest, Romania; (E.U.); (M.T.)
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10
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Yang L, Liu B, Zheng S, Xu L, Yao M. Understanding the initiation, delivery and processing of bone cancer pain from the peripheral to the central nervous system. Neuropharmacology 2023; 237:109641. [PMID: 37392821 DOI: 10.1016/j.neuropharm.2023.109641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 06/01/2023] [Accepted: 06/20/2023] [Indexed: 07/03/2023]
Abstract
Bone cancer pain is a complex condition characterized by persistent, sudden, spontaneous pain accompanied by hyperalgesia that typically arises from bone metastases or primary bone tumors, causing severe discomfort and significantly diminishing cancer patients' quality of life and confidence in their ability to overcome the disease. It is widely known that peripheral nerves are responsible for detecting harmful stimuli, which are then transmitted to the brain via the spinal cord, resulting in the perception of pain. In the case of bone cancer, tumors and stromal cells within the bone marrow release various chemical signals, including inflammatory factors, colony-stimulating factors, chemokines, and hydrogen ions. Consequently, the nociceptors located at the nerve endings within the bone marrow sense these chemical signals, generating electrical signals that are then transmitted to the brain through the spinal cord. Subsequently, the brain processes these electrical signals in a complex manner to create the sensation of bone cancer pain. Numerous studies have investigated the transmission of bone cancer pain from the periphery to the spinal cord. However, the processing of pain information induced by bone cancer within the brain remains unclear. With the continuous advancements in brain science and technology, the brain mechanism of bone cancer pain would become more clearly understood. Herein, we focus on summarizing the peripheral nerve perception of the spinal cord transmission of bone cancer pain and provide a brief overview of the ongoing research regarding the brain mechanisms involved in bone cancer pain.
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Affiliation(s)
- Lei Yang
- Department of Anesthesia and Pain Medicine, Affiliated Hospital of Jiaxing University, No. 1882 Zhong-Huan-Nan Road, Jiaxing, 314001, China
| | - Beibei Liu
- Department of Anesthesia and Pain Medicine, Affiliated Hospital of Jiaxing University, No. 1882 Zhong-Huan-Nan Road, Jiaxing, 314001, China
| | - Shang Zheng
- Department of Anesthesia and Pain Medicine, Affiliated Hospital of Jiaxing University, No. 1882 Zhong-Huan-Nan Road, Jiaxing, 314001, China
| | - Longsheng Xu
- Department of Anesthesia and Pain Medicine, Affiliated Hospital of Jiaxing University, No. 1882 Zhong-Huan-Nan Road, Jiaxing, 314001, China.
| | - Ming Yao
- Department of Anesthesia and Pain Medicine, Affiliated Hospital of Jiaxing University, No. 1882 Zhong-Huan-Nan Road, Jiaxing, 314001, China.
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11
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Yang YY, Soh R, Vera-Colón M, Huang M, Zur Nieden NI, Wang Y. Targeted Proteomic Profiling Revealed Roles of Small GTPases during Osteogenic Differentiation. Anal Chem 2023; 95:6879-6887. [PMID: 37083350 PMCID: PMC10290900 DOI: 10.1021/acs.analchem.2c05781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/22/2023]
Abstract
The small GTPase superfamily of proteins are crucial for numerous cellular processes, including early development. The roles of these proteins in osteogenic differentiation, however, remained poorly explored. In this study, we employed a high-throughput targeted proteomic method, relying on scheduled liquid chromatography-multiple-reaction monitoring (LC-MRM) coupled with synthetic stable isotope-labeled peptides, to interrogate systematically the temporal responses of the entire small GTPase proteome during the course of osteogenic differentiation of H9 human embryonic stem cells. Our results demonstrated that the method offers high quantification accuracy, reproducibility, and throughput. In addition, the quantification results revealed altered expression of a large number of small GTPases accompanied with osteogenic differentiation, especially those involved with autophagy. We also documented a previously unrecognized role of KRAS in osteogenesis, where it regulates the accumulation of extracellular matrix for mineralization through attenuating the activity of secreted matrix metalloproteinase 9 (MMP9). Together, this study represents a novel application of a state-of-the-art analytical method, i.e., targeted quantitative proteomics, for revealing the progressive reprogramming of the small GTPase proteome during osteogenic differentiation of human embryonic stem cells, and our results revealed KRAS as a new regulator for osteogenesis.
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Affiliation(s)
- Yen-Yu Yang
- Department of Chemistry, University of California, Riverside, Riverside, California 92521-0403, United States
| | - Ruthia Soh
- Department of Molecular, Cell, and Systems Biology, University of California, Riverside, Riverside, California 92521-0403, United States
| | - Madeline Vera-Colón
- Environmental Toxicology Graduate Program, University of California, Riverside, Riverside, California 92521-0403, United States
| | - Ming Huang
- Environmental Toxicology Graduate Program, University of California, Riverside, Riverside, California 92521-0403, United States
| | - Nicole I Zur Nieden
- Department of Molecular, Cell, and Systems Biology, University of California, Riverside, Riverside, California 92521-0403, United States
- Environmental Toxicology Graduate Program, University of California, Riverside, Riverside, California 92521-0403, United States
| | - Yinsheng Wang
- Department of Chemistry, University of California, Riverside, Riverside, California 92521-0403, United States
- Environmental Toxicology Graduate Program, University of California, Riverside, Riverside, California 92521-0403, United States
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12
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Park YS, Kim HW, Hwang JH, Eom JY, Kim DH, Park J, Tae HJ, Lee S, Yoo JG, Kim JI, Lim JH, Kwun IS, Baek MC, Cho YE, Kim DK. Plum-Derived Exosome-like Nanovesicles Induce Differentiation of Osteoblasts and Reduction of Osteoclast Activation. Nutrients 2023; 15:2107. [PMID: 37432256 DOI: 10.3390/nu15092107] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 04/17/2023] [Accepted: 04/17/2023] [Indexed: 07/12/2023] Open
Abstract
Osteoblasts and osteoclasts play crucial roles in bone formation and bone resorption. We found that plum-derived exosome-like nanovesicles (PENVs) suppressed osteoclast activation and modulated osteoblast differentiation. PENVs increased the proliferation, differentiation, and mineralization of osteoblastic MC3T3-E1 cells and osteoblasts from mouse bone marrow cultures. Notably, PENVs elevated the expression of osteoblastic transcription factors and osteoblast differentiation marker proteins in MC3T3-E1 cells. Higher levels of phosphorylated BMP-2, p38, JNK, and smad1 proteins were detected in PENV-treated MC3T3-E1 cells. Additionally, the number of TRAP-positive cells was significantly decreased in PENV-treated osteoclasts isolated from osteoblasts from mouse bone marrow cultures. Importantly, osteoclastogenesis of marker proteins such as PPAR-gamma, NFATc1, and c-Fos were suppressed by treatment with PENVs (50 μg/mL). Taken together, these results demonstrate that PENVs can be used as therapeutic targets for treating bone-related diseases by improving osteoblast differentiation and inhibiting osteoclast activation for the first time.
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Affiliation(s)
- Yu-Seong Park
- Department of Molecular Medicine, Cell and Matrix Research Institute (CMRI), School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea
| | - Hyun-Woo Kim
- Korea Zoonosis Research Institute, Jeonbuk National University, Iksan 54531, Republic of Korea
| | - Jin-Hyeon Hwang
- Korea Zoonosis Research Institute, Jeonbuk National University, Iksan 54531, Republic of Korea
| | - Jung-Young Eom
- Korea Zoonosis Research Institute, Jeonbuk National University, Iksan 54531, Republic of Korea
| | - Dong-Ha Kim
- Department of Molecular Medicine, Cell and Matrix Research Institute (CMRI), School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea
| | - Jinho Park
- College of Veterinary Medicine, Jeonbuk National University, Iksan 54596, Republic of Korea
| | - Hyun-Jin Tae
- Department of Veterinary Anatomy, College of Veterinary Medicine and Institute of Animal Transplantation, Jeonbuk National University, Iksan 54596, Republic of Korea
| | - Seunghoon Lee
- Department of Animal Biotechnology Division, National Institute of Animal Science, Rural Development Administration, Wanju 55365, Republic of Korea
| | - Jae-Gyu Yoo
- Department of Animal Biotechnology Division, National Institute of Animal Science, Rural Development Administration, Wanju 55365, Republic of Korea
| | - Jee-In Kim
- Department of Biochemistry and Cell Biology, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea
| | - Jae-Hwan Lim
- Department of Biological Science, Andong National University, Andong 36729, Republic of Korea
| | - In-Sook Kwun
- Department of Food and Nutrition, Andong National University, Andong 36729, Republic of Korea
| | - Moon-Chang Baek
- Department of Molecular Medicine, Cell and Matrix Research Institute (CMRI), School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea
| | - Young-Eun Cho
- Department of Food and Nutrition, Andong National University, Andong 36729, Republic of Korea
| | - Do-Kyun Kim
- Korea Zoonosis Research Institute, Jeonbuk National University, Iksan 54531, Republic of Korea
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13
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Williams DF. The plasticity of biocompatibility. Biomaterials 2023; 296:122077. [PMID: 36907003 DOI: 10.1016/j.biomaterials.2023.122077] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 02/19/2023] [Accepted: 03/02/2023] [Indexed: 03/11/2023]
Abstract
Biocompatibility concerns the phenomena that occur within the interactions between biomaterials and human patients, which ultimately control the performance of many facets of medical technology. It involves aspects of materials science, many different forms of engineering and nanotechnology, chemistry, biophysics, molecular and cellular biology, immunology, pathology and a myriad of clinical applications. It is not surprising that an overarching framework of mechanisms of biocompatibility has been difficult to elucidate and validate. This essay discusses one fundamental reason for this; we have tended to consider biocompatibility pathways as essentially linear sequences of events which follow well-understood processes of materials science and biology. The reality, however, is that the pathways may involve a great deal of plasticity, in which many additional idiosyncratic factors, including those of genetic, epigenetic and viral origin, exert influence, as do complex mechanical, physical and pharmacological variables. Plasticity is an inherent core feature of the performance of synthetic materials; here we follow the more recent biological applications of plasticity concepts into the sphere of biocompatibility pathways. A straightforward linear pathway may result in successful outcomes for many patients; we may describe this in terms of classic biocompatibility pathways. In other situations, which usually command much more attention because of their unsuccessful outcomes, these plasticity-driven processes follow alternative biocompatibility pathways; often, the variability in outcomes with identical technologies is due to biological plasticity rather than material or device deficiency.
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Affiliation(s)
- David F Williams
- Wake Forest Institute of Regenerative Medicine, Winston-Salem, North Carolina, USA.
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14
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Moura SR, Freitas J, Ribeiro-Machado C, Lopes J, Neves N, Canhão H, Rodrigues AM, Barbosa MA, Almeida MI. Long non-coding RNA H19 regulates matrisome signature and impacts cell behavior on MSC-engineered extracellular matrices. Stem Cell Res Ther 2023; 14:37. [PMID: 36882843 PMCID: PMC9993741 DOI: 10.1186/s13287-023-03250-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 12/25/2022] [Indexed: 03/09/2023] Open
Abstract
BACKGROUND The vast and promising class of long non-coding RNAs (lncRNAs) has been under investigation for distinct therapeutic applications. Nevertheless, their role as molecular drivers of bone regeneration remains poorly studied. The lncRNA H19 mediates osteogenic differentiation of Mesenchymal Stem/Stromal Cells (MSCs) through the control of intracellular pathways. However, the effect of H19 on the extracellular matrix (ECM) components is still largely unknown. This research study was designed to decode the H19-mediated ECM regulatory network, and to reveal how the decellularized siH19-engineered matrices influence MSC proliferation and fate. This is particularly relevant for diseases in which the ECM regulation and remodeling processes are disrupted, such as osteoporosis. METHODS Mass spectrometry-based quantitative proteomics analysis was used to identify ECM components, after oligonucleotides delivery to osteoporosis-derived hMSCs. Moreover, qRT-PCR, immunofluorescence and proliferation, differentiation and apoptosis assays were performed. Engineered matrices were decellularized, characterized by atomic force microscopy and repopulated with hMSC and pre-adipocytes. Clinical bone samples were characterized by histomorphometry analysis. RESULTS Our study provides an in-depth proteome-wide and matrisome-specific analysis of the ECM proteins controlled by the lncRNA H19. Using bone marrow-isolated MSC from patients with osteoporosis, we identified fibrillin-1 (FBN1), vitronectin (VTN) and collagen triple helix repeat containing 1 (CTHRC1), among others, as having different pattern levels following H19 silencing. Decellularized siH19-engineered matrices are less dense and have a decreased collagen content compared with control matrices. Repopulation with naïve MSCs promotes a shift towards the adipogenic lineage in detriment of the osteogenic lineage and inhibits proliferation. In pre-adipocytes, these siH19-matrices enhance lipid droplets formation. Mechanistically, H19 is targeted by miR-29c, whose expression is decreased in osteoporotic bone clinical samples. Accordingly, miR-29c impacts MSC proliferation and collagen production, but does not influence ALP staining or mineralization, revealing that H19 silencing and miR-29c mimics have complementary but not overlapping functions. CONCLUSION Our data suggest H19 as a therapeutic target to engineer the bone ECM and to control cell behavior.
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Affiliation(s)
- Sara Reis Moura
- Instituto de Investigação E Inovação Em Saúde (i3S), Universidade Do Porto, Rua Alfredo Allen, 208, 4200-135, Porto, Portugal.,Instituto de Engenharia Biomédica (INEB), Universidade Do Porto, Porto, Portugal.,Instituto de Ciências Biomédicas Abel Salazar (ICBAS), Universidade Do Porto, Porto, Portugal
| | - Jaime Freitas
- Instituto de Investigação E Inovação Em Saúde (i3S), Universidade Do Porto, Rua Alfredo Allen, 208, 4200-135, Porto, Portugal.,Instituto de Engenharia Biomédica (INEB), Universidade Do Porto, Porto, Portugal
| | - Cláudia Ribeiro-Machado
- Instituto de Investigação E Inovação Em Saúde (i3S), Universidade Do Porto, Rua Alfredo Allen, 208, 4200-135, Porto, Portugal.,Instituto de Engenharia Biomédica (INEB), Universidade Do Porto, Porto, Portugal
| | - Jorge Lopes
- Departamento de Ortopedia, Centro Hospitalar Universitário São João (CHUSJ), Porto, Portugal
| | - Nuno Neves
- Instituto de Investigação E Inovação Em Saúde (i3S), Universidade Do Porto, Rua Alfredo Allen, 208, 4200-135, Porto, Portugal.,Instituto de Engenharia Biomédica (INEB), Universidade Do Porto, Porto, Portugal.,Departamento de Ortopedia, Centro Hospitalar Universitário São João (CHUSJ), Porto, Portugal.,Hospital CUF, Porto, Portugal.,Faculdade de Medicina (FMUP), Universidade Do Porto, Porto, Portugal
| | - Helena Canhão
- NOVA Medical School - Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Lisbon, Portugal.,Comprehensive Health Research Center (CHRC), Universidade Nova de Lisboa, Lisbon, Portugal
| | - Ana Maria Rodrigues
- NOVA Medical School - Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Lisbon, Portugal.,Comprehensive Health Research Center (CHRC), Universidade Nova de Lisboa, Lisbon, Portugal
| | - Mário Adolfo Barbosa
- Instituto de Investigação E Inovação Em Saúde (i3S), Universidade Do Porto, Rua Alfredo Allen, 208, 4200-135, Porto, Portugal.,Instituto de Engenharia Biomédica (INEB), Universidade Do Porto, Porto, Portugal.,Instituto de Ciências Biomédicas Abel Salazar (ICBAS), Universidade Do Porto, Porto, Portugal
| | - Maria Inês Almeida
- Instituto de Investigação E Inovação Em Saúde (i3S), Universidade Do Porto, Rua Alfredo Allen, 208, 4200-135, Porto, Portugal. .,Instituto de Engenharia Biomédica (INEB), Universidade Do Porto, Porto, Portugal. .,Instituto de Ciências Biomédicas Abel Salazar (ICBAS), Universidade Do Porto, Porto, Portugal.
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15
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Titanium dioxide nanotubes increase purinergic receptor P2Y6 expression and activate its downstream PKCα-ERK1/2 pathway in bone marrow mesenchymal stem cells under osteogenic induction. Acta Biomater 2023; 157:670-682. [PMID: 36442823 DOI: 10.1016/j.actbio.2022.11.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 10/25/2022] [Accepted: 11/21/2022] [Indexed: 11/27/2022]
Abstract
Titanium dioxide (TiO2) nanotubes can improve the osseointegration of pure titanium implants, but this exact mechanism has not been fully elucidated. The purinergic receptor P2Y6 is expressed in bone marrow mesenchymal stem cells (BMSCs) and participates in the regulation of bone metabolism. However, it is unclear as to whether P2Y6 is involved in the osteogenic differentiation of BMSCs induced by TiO2 nanotubes. TiO2 nanotubes were prepared on the surface of titanium specimens using the anodizing method and characterized their features. Quantitative reverse transcriptase polymerase chain reaction and western blotting were used to detect the expression of P2Y6, markers of osteogenic differentiation, and PKCα-ERK1/2. A rat femoral defect model was established to evaluate the osseointegration effect of TiO2 nanotubes combined with P2Y6 agonists. The results showed that the average inner diameter of the TiO2 nanotubes increased with an increase in voltage (voltage range of 30-90V), and the expression of P2Y6 in BMSCs could be upregulated by TiO2 nanotubes in osteogenic culture. Inhibition of P2Y6 expression partially inhibited the osteogenic effect of TiO2 nanotubes and downregulated the activity of the PKCα-ERK1/2 pathway. When using in vitro and in vivo experiments, the osteogenic effect of TiO2 nanotubes when combined with P2Y6 agonists was more pronounced. TiO2 nanotubes promoted the P2Y6 expression of BMSCs during osteogenic differentiation and promoted osteogenesis by activating the PKCα-ERK1/2 pathway. The combined application of TiO2 nanotubes and P2Y6 agonists may be an effective new strategy to improve the osseointegration of titanium implants. STATEMENT OF SIGNIFICANCE: Titanium dioxide (TiO2) nanotubes can improve the osseointegration of pure titanium implants, but this exact mechanism has not been fully elucidated. The purinergic receptor P2Y6 is expressed in bone marrow mesenchymal stem cells (BMSCs) and participates in the regulation of bone metabolism. However, it is unclear as to whether P2Y6 is involved in the osteogenic differentiation of BMSCs induced by TiO2 nanotubes. For the first time, this study revealed the relationship between TiO2 nanotubes and purine receptor P2Y6, and further explored its mode of action, which may provide clues as to the regulatory role of TiO2 nanotubes on osteogenic differentiation of BMSCs. These findings will help to develop novel methods for guiding material design and biosafety evaluation of nano implants.
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16
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Sorvina A, Antoniou M, Esmaeili Z, Kochetkova M. Unusual Suspects: Bone and Cartilage ECM Proteins as Carcinoma Facilitators. Cancers (Basel) 2023; 15:cancers15030791. [PMID: 36765749 PMCID: PMC9913341 DOI: 10.3390/cancers15030791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/25/2023] [Accepted: 01/25/2023] [Indexed: 01/31/2023] Open
Abstract
The extracellular matrix (ECM) is the complex three-dimensional network of fibrous proteins and proteoglycans that constitutes an essential part of every tissue to provide support for normal tissue homeostasis. Tissue specificity of the ECM in its topology and structure supports unique biochemical and mechanical properties of each organ. Cancers, like normal tissues, require the ECM to maintain multiple processes governing tumor development, progression and spread. A large body of experimental and clinical evidence has now accumulated to demonstrate essential roles of numerous ECM components in all cancer types. Latest findings also suggest that multiple tumor types express, and use to their advantage, atypical ECM components that are not found in the cancer tissue of origin. However, the understanding of cancer-specific expression patterns of these ECM proteins and their exact roles in selected tumor types is still sketchy. In this review, we summarize the latest data on the aberrant expression of bone and cartilage ECM proteins in epithelial cancers and their specific functions in the pathogenesis of carcinomas and discuss future directions in exploring the utility of this selective group of ECM components as future drug targets.
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17
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Zhang Y, Liang J, Liu P, Wang Q, Liu L, Zhao H. The RANK/RANKL/OPG system and tumor bone metastasis: Potential mechanisms and therapeutic strategies. Front Endocrinol (Lausanne) 2022; 13:1063815. [PMID: 36589815 PMCID: PMC9800780 DOI: 10.3389/fendo.2022.1063815] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 12/01/2022] [Indexed: 12/23/2022] Open
Abstract
With the markedly increased diagnosis and incidence of cancer in the population, tumor bone metastasis has become a frequent event in tumor patients. Healthy bone integrity is maintained by a delicate balance between bone formation and bone resorption. Unfortunately, many tumors, such as prostate and breast, often metastasize to the bone, and the alterations to the bone homeostasis can particularly favor tumor homing and consequent osteolytic or osteoblastic lesions. Receptor activator of NF-κB ligand (RANKL), its receptor RANK, and osteoprotegerin (OPG) are involved in the regulation of the activation, differentiation, and survival of osteoclasts, which play critical roles in bone metastasis formation. High rates of osteoclastic bone resorption significantly increase fracture risk, cause severe bone pain, and contribute to homing tumor cells in bone and bone marrow. Consequently, suppression of the RANK/RANKL/OPG system and osteoclastic activity can not only ameliorate bone resorption but may also prevent tumor bone metastases. This review summarizes the important role of the RANK/RANKL/OPG system and osteoclasts in bone homeostasis and its effect on tumor bone metastasis and discusses therapeutic strategies based on RANKL inhibition.
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Affiliation(s)
| | | | | | | | | | - Hongmou Zhao
- Department of Foot and Ankle Surgery, Honghui Hospital of Xi’an Jiaotong University, Xi’an, China
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18
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Entz L, Falgayrac G, Chauveau C, Pasquier G, Lucas S. The extracellular matrix of human bone marrow adipocytes and glucose concentration differentially alter mineralization quality without impairing osteoblastogenesis. Bone Rep 2022; 17:101622. [PMID: 36187598 PMCID: PMC9519944 DOI: 10.1016/j.bonr.2022.101622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/09/2022] [Accepted: 09/19/2022] [Indexed: 11/18/2022] Open
Abstract
Bone marrow adipocytes (BMAds) accrue in various states of osteoporosis and interfere with bone remodeling through the secretion of various factors. However, involvement of the extracellular matrix (ECM) produced by BMAds in the impairment of bone marrow mesenchymal stromal cell (BM-MSC) osteoblastogenesis has received little attention. In type 2 diabetes (T2D), skeletal fragility is associated with several changes in bone quality that are incompletely understood, and BMAd quantity increases in relationship to poor glycemic control. Considering their altered phenotype in this pathophysiological context, we aimed to determine the contribution of the ECM of mature BMAds to osteoblastogenesis and mineralization quality in the context of chronic hyperglycemia. Human BM-MSCs were differentiated for 21 days in adipogenic medium containing either a normoglycemic (LG, 5.5 mM) or a high glucose concentration (HG, 25 mM). The ECM laid down by BMAds were devitalized through cell removal to examine their impact on the proliferation and differentiation of BM-MSCs toward osteoblastogenesis in LG and HG conditions. Compared to control plates, both adipocyte ECMs promoted cell adhesion and proliferation. As shown by the unmodified RUNX2 and osteocalcin mRNA levels, BM-MSC commitment in osteoblastogenesis was hampered by neither the hyperglycemic condition nor the adipocyte matrices. However, adipocyte ECMs or HG condition altered the mineralization phase with perturbed expression levels of type 1 collagen, MGP and osteopontin. Despite higher ALP activity, mineralization levels per cell were decreased for osteoblasts grown on adipocyte ECMs compared to controls. Raman spectrometry revealed that culturing on adipocyte matrices specifically prevents type-B carbonate substitution and favors collagen crosslinking, in contrast to exposure to HG concentration alone. Moreover, the mineral to organic ratio was disrupted according to the presence of adipocyte ECM and the glucose concentration used for adipocyte or osteoblast culture. HG concentration and adipocyte ECM lead to different defects in mineralization quality, recapitulating contradictory changes reported in T2D osteoporosis. Our study shows that ECMs from BMAds do not impair osteoblastogenesis but alter both the quantity and quality of mineralization partly in a glucose concentration-dependent manner. This finding sheds light on the involvement of BMAds, which should be considered in the compromised bone quality of T2D and osteoporosis patients more generally. Glucose level alters the Extracellular Matrix composition of Bone Marrow adipocytes. Osteoblastogenesis on adipocyte ECMs is unaltered but produced less mineral amount. The quality of the mineral is altered differently by adipocyte ECMs or glucose levels. The presence of BM adipocytes should be valued in damaged osteoporosis bone quality.
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Key Words
- AGEs, Advanced glycation end-products
- BM-MSC, Bone marrow mesenchymal stromal cell
- BMAd, Bone marrow adipocyte
- ECM, Extracellular matrix
- ECMBMAd HG, Extracellular matrix obtained from BMAds cultured in HG concentration
- ECMBMAd LG, Extracellular matrix obtained from BMAds cultured in LG concentration
- ECMBMAd, Extracellular matrix obtained from BMAds
- Extracellular matrix
- GAG, glycosaminoglycan
- HA, hydroxyapatite
- HG, High glucose
- Hyperglycemia
- LG, Low glucose
- LGM, Low glucose and mannitol
- Marrow adipocytes
- Osteoblast
- Osteoporosis
- Skeletal mesenchymal stromal cells
- T2D, Type 2 diabetes
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19
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Iolascon G, Paoletta M, Liguori S, Gimigliano F, Moretti A. Bone fragility: conceptual framework, therapeutic implications, and COVID-19-related issues. Ther Adv Musculoskelet Dis 2022; 14:1759720X221133429. [PMID: 36317067 PMCID: PMC9614590 DOI: 10.1177/1759720x221133429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 09/30/2022] [Indexed: 11/07/2022] Open
Abstract
Bone fragility is the susceptibility to fracture even for common loads because of structural, architectural, or material alterations of bone tissue that result in poor bone strength. In osteoporosis, quantitative and qualitative changes in density, geometry, and micro-architecture modify the internal stress state predisposing to fragility fractures. Bone fragility substantially depends on the structural behavior related to the size and shape of the bone characterized by different responses in the load–deformation curve and on the material behavior that reflects the intrinsic material properties of the bone itself, such as yield and fatigue. From a clinical perspective, the measurement of bone density by DXA remains the gold standard for defining the risk of fragility fracture in all population groups. However, non-quantitative parameters, such as macro-architecture, geometry, tissue material properties, and microcracks accumulation can modify the bone’s mechanical strength. This review provides an overview of the role of different contributors to bone fragility and how these factors might be influenced by the use of anti-osteoporotic drugs and by the COVID-19 pandemic.
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Affiliation(s)
- Giovanni Iolascon
- Department of Medical and Surgical Specialties and Dentistry, University of Campania ‘Luigi Vanvitelli’, Naples, Italy
| | | | - Sara Liguori
- Department of Medical and Surgical Specialties and Dentistry, University of Campania ‘Luigi Vanvitelli’, Naples, Italy
| | - Francesca Gimigliano
- Department of Mental and Physical Health and Preventive Medicine, University of Campania ‘Luigi Vanvitelli’, Naples, Italy
| | - Antimo Moretti
- Department of Medical and Surgical Specialties and Dentistry, University of Campania ‘Luigi Vanvitelli’, Naples, Italy
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20
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V. K. AD, Ray S, Arora U, Mitra S, Sionkowska A, Jaiswal AK. Dual drug delivery platforms for bone tissue engineering. Front Bioeng Biotechnol 2022; 10:969843. [PMID: 36172012 PMCID: PMC9511792 DOI: 10.3389/fbioe.2022.969843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 08/23/2022] [Indexed: 11/22/2022] Open
Abstract
The dual delivery platforms used in bone tissue engineering provide supplementary bioactive compounds that include distinct medicines and growth factors thereby aiding enhanced bone regeneration. The delivery of these compounds can be adjusted for a short or prolonged time based on the requirement by altering various parameters of the carrier platform. The platforms thus used are fabricated to mimic the niche of the bone microenvironment, either in the form of porous 3D structures, microspheres, or films. Thus, this review article focuses on the concept of dual drug delivery platform and its importance, classification of various platforms for dual drug delivery specific to bone tissue engineering, and finally highlights the foresight into the future direction of these techniques for better clinical applications.
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Affiliation(s)
- Anupama Devi V. K.
- Tissue Engineering Group, Centre for Biomaterials, Cellular and Molecular Theranostics (CBCMT), Vellore Institute of Technology (VIT), Vellore, India
- School of Bio Sciences and Technology (SBST), Vellore Institute of Technology (VIT), Vellore, India
| | - Sarbajit Ray
- School of Bio Sciences and Technology (SBST), Vellore Institute of Technology (VIT), Vellore, India
| | - Udita Arora
- School of Bio Sciences and Technology (SBST), Vellore Institute of Technology (VIT), Vellore, India
| | - Sunrito Mitra
- School of Bio Sciences and Technology (SBST), Vellore Institute of Technology (VIT), Vellore, India
| | | | - Amit Kumar Jaiswal
- Tissue Engineering Group, Centre for Biomaterials, Cellular and Molecular Theranostics (CBCMT), Vellore Institute of Technology (VIT), Vellore, India
- *Correspondence: Amit Kumar Jaiswal,
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21
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Scaffold Pore Curvature Influences ΜSC Fate through Differential Cellular Organization and YAP/TAZ Activity. Int J Mol Sci 2022; 23:ijms23094499. [PMID: 35562890 PMCID: PMC9102667 DOI: 10.3390/ijms23094499] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Revised: 04/15/2022] [Accepted: 04/16/2022] [Indexed: 12/12/2022] Open
Abstract
Tissue engineering aims to repair, restore, and/or replace tissues in the human body as an alternative to grafts and prostheses. Biomaterial scaffolds can be utilized to provide a three-dimensional microenvironment to facilitate tissue regeneration. Previously, we reported that scaffold pore size influences vascularization and extracellular matrix composition both in vivo and in vitro, to ultimately influence tissue phenotype for regenerating cranial suture and bone tissues, which have markedly different tissue properties despite similar multipotent stem cell populations. To rationally design biomaterials for specific cell and tissue fate specification, it is critical to understand the molecular processes governed by cell-biomaterial interactions, which guide cell fate specification. Building on our previous work, in this report we investigated the hypothesis that scaffold pore curvature, the direct consequence of pore size, modulates the differentiation trajectory of mesenchymal stem cells (MSCs) through alterations in the cytoskeleton. First, we demonstrated that sufficiently small pores facilitate cell clustering in subcutaneous explants cultured in vivo, which we previously reported to demonstrate stem tissue phenotype both in vivo and in vitro. Based on this observation, we cultured cell-scaffold constructs in vitro to assess early time point interactions between cells and the matrix as a function of pore size. We demonstrate that principle curvature directly influences nuclear aspect and cell aggregation in vitro. Scaffold pores with a sufficiently low degree of principle curvature enables cell differentiation; pharmacologic inhibition of actin cytoskeleton polymerization in these scaffolds decreased differentiation, indicating a critical role of the cytoskeleton in transducing cues from the scaffold pore microenvironment to the cell nucleus. We fabricated a macropore model, which allows for three-dimensional confocal imaging and demonstrates that a higher principle curvature facilitates cell aggregation and the formation of a potentially protective niche within scaffold macropores which prevents MSC differentiation and retains their stemness. Sufficiently high principle curvature upregulates yes-associated protein (YAP) phosphorylation while decreased principle curvature downregulates YAP phosphorylation and increases YAP nuclear translocation with subsequent transcriptional activation towards an osteogenic differentiation fate. Finally, we demonstrate that the inhibition of the YAP/TAZ pathway causes a defect in differentiation, while YAP/TAZ activation causes premature differentiation in a curvature-dependent way when modulated by verteporfin (VP) and 1-oleyl-lysophosphatidic acid (LPA), respectively, confirming the critical role of biomaterials-mediated YAP/TAZ signaling in cell differentiation and fate specification. Our data support that the principle curvature of scaffold macropores is a critical design criterion which guides the differentiation trajectory of mesenchymal stem cells’ scaffolds. Biomaterial-mediated regulation of YAP/TAZ may significantly contribute to influencing the regenerative outcomes of biomaterials-based tissue engineering strategies through their specific pore design.
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22
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Wan HY, Shin RLY, Chen JCH, Assunção M, Wang D, Nilsson SK, Tuan RS, Blocki A. Dextran sulfate-amplified extracellular matrix deposition promotes osteogenic differentiation of mesenchymal stem cells. Acta Biomater 2022; 140:163-177. [PMID: 34875356 DOI: 10.1016/j.actbio.2021.11.049] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 11/24/2021] [Accepted: 11/30/2021] [Indexed: 12/21/2022]
Abstract
The development of bone-like tissues in vitro that exhibit key features similar to those in vivo is needed to produce tissue models for drug screening and the study of bone physiology and disease pathogenesis. Extracellular matrix (ECM) is a predominant component of bone in vivo; however, as ECM assembly is sub-optimal in vitro, current bone tissue engineering approaches are limited by an imbalance in ECM-to-cell ratio. We amplified the deposition of osteoblastic ECM by supplementing dextran sulfate (DxS) into osteogenically induced cultures of human mesenchymal stem cells (MSCs). DxS, previously implicated to act as a macromolecular crowder, was recently demonstrated to aggregate and co-precipitate major ECM components, including collagen type I, thereby amplifying its deposition. This effect was re-confirmed for MSC cultures undergoing osteogenic induction, where DxS supplementation augmented collagen type I deposition, accompanied by extracellular osteocalcin accumulation. The resulting differentiated osteoblasts exhibited a more mature osteogenic gene expression profile, indicated by a strong upregulation of the intermediate and late osteogenic markers ALP and OCN, respectively. The associated cellular microenvironment was also enriched in bone morphogenetic protein 2 (BMP-2). Interestingly, the resulting decellularized matrices exhibited the strongest osteo-inductive effects on re-seeded MSCs, promoted cell proliferation, osteogenic marker expression and ECM calcification. Taken together, these findings suggest that DxS-mediated enhancement of osteogenic differentiation by MSCs is mediated by the amplified ECM, which is enriched in osteo-inductive factors. We have thus established a simple and reproducible approach to generate ECM-rich bone-like tissue in vitro with sequestration of osteo-inductive factors. STATEMENT OF SIGNIFICANCE: As extracellular matrix (ECM) assembly is significantly retarded in vitro, the imbalance in ECM-to-cell ratio hampers current in vitro bone tissue engineering approaches in their ability to faithfully resemble their in vivo counterpart. We addressed this limitation by leveraging a poly-electrolyte mediated co-assembly and amplified deposition of ECM during osteogenic differentiation of human mesenchymal stem cells (MSCs). The resulting pericelluar space in culture was enriched in organic and inorganic bone ECM components, as well as osteo-inductive factors, which promoted the differentiation of MSCs towards a more mature osteoblastic phenotype. These findings thus demonstrated a simple and reproducible approach to generate ECM-rich bone-like tissue in vitro with a closer recapitulation of the in vivo tissue niche.
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23
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Fu JN, Wang X, Yang M, Chen YR, Zhang JY, Deng RH, Zhang ZN, Yu JK, Yuan FZ. Scaffold-Based Tissue Engineering Strategies for Osteochondral Repair. Front Bioeng Biotechnol 2022; 9:812383. [PMID: 35087809 PMCID: PMC8787149 DOI: 10.3389/fbioe.2021.812383] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 12/16/2021] [Indexed: 12/19/2022] Open
Abstract
Over centuries, several advances have been made in osteochondral (OC) tissue engineering to regenerate more biomimetic tissue. As an essential component of tissue engineering, scaffolds provide structural and functional support for cell growth and differentiation. Numerous scaffold types, such as porous, hydrogel, fibrous, microsphere, metal, composite and decellularized matrix, have been reported and evaluated for OC tissue regeneration in vitro and in vivo, with respective advantages and disadvantages. Unfortunately, due to the inherent complexity of organizational structure and the objective limitations of manufacturing technologies and biomaterials, we have not yet achieved stable and satisfactory effects of OC defects repair. In this review, we summarize the complicated gradients of natural OC tissue and then discuss various osteochondral tissue engineering strategies, focusing on scaffold design with abundant cell resources, material types, fabrication techniques and functional properties.
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Affiliation(s)
- Jiang-Nan Fu
- Department of Sports Medicine, Peking University Third Hospital, Beijing, China.,Institute of Sports Medicine of Peking University, Beijing, China
| | - Xing Wang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Meng Yang
- Department of Sports Medicine, Peking University Third Hospital, Beijing, China.,Institute of Sports Medicine of Peking University, Beijing, China
| | - You-Rong Chen
- Department of Sports Medicine, Peking University Third Hospital, Beijing, China.,Institute of Sports Medicine of Peking University, Beijing, China
| | - Ji-Ying Zhang
- Department of Sports Medicine, Peking University Third Hospital, Beijing, China.,Institute of Sports Medicine of Peking University, Beijing, China
| | - Rong-Hui Deng
- Department of Sports Medicine, Peking University Third Hospital, Beijing, China.,Institute of Sports Medicine of Peking University, Beijing, China
| | - Zi-Ning Zhang
- Department of Sports Medicine, Peking University Third Hospital, Beijing, China.,Institute of Sports Medicine of Peking University, Beijing, China
| | - Jia-Kuo Yu
- Department of Sports Medicine, Peking University Third Hospital, Beijing, China.,Institute of Sports Medicine of Peking University, Beijing, China
| | - Fu-Zhen Yuan
- Department of Sports Medicine, Peking University Third Hospital, Beijing, China.,Institute of Sports Medicine of Peking University, Beijing, China
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24
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Ping J, Li L, Dong Y, Wu X, Huang X, Sun B, Zeng B, Xu F, Liang W. The Role of Long Non-Coding RNAs and Circular RNAs in Bone Regeneration: Modulating MiRNAs Function. J Tissue Eng Regen Med 2021; 16:227-243. [PMID: 34958714 DOI: 10.1002/term.3277] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 12/04/2021] [Accepted: 12/10/2021] [Indexed: 11/06/2022]
Abstract
Although bone is a self-healing organ and is able to repair and restore most fractures, large bone fractures, about 10%, are not repairable. Bone grafting, as a gold standard, and bone tissue engineering using biomaterials, growth factors, and stem cells have been developed to restore large bone defects. Since bone regeneration is a complex and multiple-step process and the majority of the human genome, about 98%, is composed of the non-protein-coding regions, non-coding RNAs (ncRNAs) play essential roles in bone regeneration. Recent studies demonstrated that long ncRNAs (lncRNAs) and circular RNAs (circRNAs), as members of ncRNAs, are widely involved in bone regeneration by interaction with microRNAs (miRNAs) and constructing a lncRNA or circRNA/miRNA/mRNA regulatory network. The constructed network regulates the differentiation of stem cells into osteoblasts and their commitment to osteogenesis. This review will present the structure and biogenesis of lncRNAs and circRNAs, the mechanism of bone repair, and the bone tissue engineering in bone defects. Finally, we will discuss the role of lncRNAs and circRNAs in osteogenesis and bone fracture healing through constructing various lncRNA or circRNA/miRNA/mRNA networks and the involved pathways. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Jianfeng Ping
- Department of Orthopaedics, Shaoxing People's Hospital, Shaoxing Hospital, Zhejiang University School of Medicine, Shaoxing, 312000, Zhejiang Province, China
| | - Laifeng Li
- Department of Traumatic Orthopaedics, Affiliated Jinan Third Hospital of Jining Medical University, Jinan, 250132, Shandong Province, China
| | - Yongqiang Dong
- Department of Orthopaedics, Xinchang People's Hospital, Shaoxing, 312500, Zhejiang Province, China
| | - Xudong Wu
- Department of Orthopaedics, Zhoushan Hospital of Traditional Chinese Medicine Affiliated to Zhejiang Chinese Medical University, Zhoushan, 316000, Zhejiang Province, China
| | - Xiaogang Huang
- Department of Orthopaedics, Zhoushan Hospital of Traditional Chinese Medicine Affiliated to Zhejiang Chinese Medical University, Zhoushan, 316000, Zhejiang Province, China
| | - Bin Sun
- Department of Orthopaedics, Zhoushan Hospital of Traditional Chinese Medicine Affiliated to Zhejiang Chinese Medical University, Zhoushan, 316000, Zhejiang Province, China
| | - Bin Zeng
- Department of Orthopaedics, Zhoushan Hospital of Traditional Chinese Medicine Affiliated to Zhejiang Chinese Medical University, Zhoushan, 316000, Zhejiang Province, China
| | - Fangming Xu
- Department of Orthopaedics, Zhoushan Hospital of Traditional Chinese Medicine Affiliated to Zhejiang Chinese Medical University, Zhoushan, 316000, Zhejiang Province, China
| | - Wenqing Liang
- Department of Orthopaedics, Zhoushan Hospital of Traditional Chinese Medicine Affiliated to Zhejiang Chinese Medical University, Zhoushan, 316000, Zhejiang Province, China
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Williams DF. Biocompatibility pathways and mechanisms for bioactive materials: The bioactivity zone. Bioact Mater 2021; 10:306-322. [PMID: 34901548 PMCID: PMC8636667 DOI: 10.1016/j.bioactmat.2021.08.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Accepted: 08/07/2021] [Indexed: 12/14/2022] Open
Abstract
This essay analyzes the scientific evidence that forms the basis of bioactive materials, covering the fundamental understanding of bioactivity phenomena and correlation with the mechanisms of biocompatibility of biomaterials. This is a detailed assessment of performance in areas such as bone-induction, cell adhesion, immunomodulation, thrombogenicity and antimicrobial behavior. Bioactivity is the modulation of biological activity by characteristics of the interfacial region that incorporates the material surface and the immediate local host tissue. Although the term ‘bioactive material’ is widely used and has a well understood general meaning, it would be useful now to concentrate on this interfacial region, considered as ‘the bioactivity zone’. Bioactivity phenomena are either due to topographical/micromechanical characteristics, or to biologically active species that are presented in the bioactivity zone. Examples of topographical/micromechanical effects are the modulation of the osteoblast – osteoclast balance, nanotopographical regulation of cell adhesion, and bactericidal nanostructures. Regulation of bioactivity by biologically active species include their influence, especially of metal ions, on signaling pathways in bone formation, the role of cell adhesion molecules and bioactive peptides in cell attachment, macrophage polarization by immunoregulatory molecules and antimicrobial peptides. While much experimental data exists to demonstrate the potential of such phenomena, there are considerable barriers to their effective clinical translation. This essay shows that there is solid scientific evidence of the existence of bioactivity mechanisms that are associated with some types of biomaterials, especially when the material is modified in a manner designed to specifically induce that activity.
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Affiliation(s)
- David F Williams
- Wake Forest Institute of Regenerative Medicine, 391 Technology Way. Winston-Salem, North Carolina, 27101, USA
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26
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Comparison of Myosepta Development and Transcriptome Profiling between Blunt Snout Bream with and Tilapia without Intermuscular Bones. BIOLOGY 2021; 10:biology10121311. [PMID: 34943226 PMCID: PMC8698383 DOI: 10.3390/biology10121311] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 12/04/2021] [Accepted: 12/06/2021] [Indexed: 02/01/2023]
Abstract
Simple Summary The presence or absence of intermuscular bones (IBs) is directly related to the economic and edible value of fish. The specific regulatory mechanism of IB formation is not completely known yet. Here, we explored the molecular mechanisms that regulate the formation of IBs based on histological analysis, transcriptome profiling, and gene expression quantification using M. amblycephala (with IBs) and O. niloticus (without IBs) as models. As a result, we identified several bone-related genes and elucidated their regulatory roles in the development of IBs. Abstract Intermuscular bones (IBs) are small spicule-like bones located in the myosepta of basal teleosts, which negatively affect the edibleness and economic value of fish. Blunt snout bream (Megalobrama amblycephala, with epineural and epipleural IBs) and tilapia (Oreochromis niloticus, without epineural and epipleural IBs) are two major aquaculture species and ideal models for studying the formation mechanisms of fish IBs. Here, we compared myosepta development between M. amblycephala and O. niloticus, based on histological analysis, transcriptome profiling, and expression analysis of bone-related genes. The histological results showed that dye condensation began to appear in the myosepta 20 days post hatching (dph) in M. amblycephala, and IBs could be clearly observed 50 dph in the myosepta, based on different staining methods. However, in O. niloticus, dye condensation was not observed in the myosepta from 10 to 60 dph. Differentially expressed genes (DEGs) at different developmental stages were screened by comparing the transcriptomes of M. amblycephala and O. niloticus, and KEGG analysis demonstrated that these DEGs were enriched in many bone-related pathways, such as focal adhesion, calcium, and Wnt signaling pathways. Quantitative PCR was performed to further compare the expression levels of some bone-related genes (scxa, scxb, runx2a, runx2b, bgp, sp7, col1a2, entpd5a, entpd5b, phex, alpl, and fgf23). All the tested genes (except for alpl) exhibited higher expression levels in M. amblycephala than in O. niloticus. A comparison of the dorsal and abdominal muscle tissues between the two species also revealed significant expression differences for most of the tested genes. The results suggest that scxa, scxb, runx2a, runx2b, entpd5a, col1a2, and bgp may play important roles in IB development. Our findings provide some insights into the molecular mechanisms of IB formation, as well as clues for further functional analysis of the identified genes to better understand the development of IBs.
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Erickson CB, Hill R, Pascablo D, Kazakia G, Hansen K, Bahney C. A timeseries analysis of the fracture callus extracellular matrix proteome during bone fracture healing. JOURNAL OF LIFE SCIENCES (WESTLAKE VILLAGE, CALIF.) 2021; 3:1-30. [PMID: 35765657 PMCID: PMC9236279 DOI: 10.36069/jols/20220601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
While most bones fully self-heal, certain diseases require bone allograft to assist with fracture healing. Bone allografts offer promise as treatments for such fractures due to their osteogenic properties. However, current bone allografts made of decellularized bone extracellular matrix (ECM) have high failure rates, and thus grafts which improve fracture healing outcomes are needed. Understanding specific changes to the ECM proteome during normal fracture healing would enable the identification of key proteins that could be used enhance osteogenicity of bone allograft. Here, we performed a timeseries analysis of the fracture callus in mice to investigate proteomic and mineralization changes to the ECM at key stages of fracture healing. We found that changes to the ECM proteome largely coincide with the distinct phases of fracture healing. Basement membrane proteins (AGRN, COL4, LAMA), cartilage proteins (COL2A1, ACAN), and collagen crosslinking enzymes (LOXL, PLOD, ITIH) were initially upregulated, followed by bone specific proteoglycans and collagens (IBSP, COL1A1). Various tissue proteases (MMP2, 9, 13, 14; CTSK, CTSG, ELANE) were expressed at different levels throughout fracture healing. These changes coordinated with mineralization of the fracture callus, which increased steeply during the initial stages of healing. Interestingly the later timepoint was characterized by a response to wound healing and high expression of clotting factors (F2, 7, 9, 10). We identified ELANE and ITIH2 as tissue remodeling enzymes having no prior known involvement with fracture healing. This data can be further mined to identify regenerative proteins for enhanced bone graft design.
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Affiliation(s)
- Christopher B. Erickson
- Department of Biochemistry and Molecular Genetics,University of Colorado, Anschutz Medical Campus, Aurora, CO
| | - Ryan Hill
- Department of Biochemistry and Molecular Genetics,University of Colorado, Anschutz Medical Campus, Aurora, CO
| | - Donna Pascablo
- Orthopaedic Trauma Institute, University of California, San Francisco (UCSF), San Francisco, CA
| | - Galateia Kazakia
- Department of Radiology and Biomedical Imaging, University of California, San Francisco (UCSF), San Francisco, CA
| | - Kirk Hansen
- Department of Biochemistry and Molecular Genetics,University of Colorado, Anschutz Medical Campus, Aurora, CO
| | - Chelsea Bahney
- Stedman Philippon Research Institute (SPRI), Center for Regenerative and Personalized Medicine. Vail, CO
- Orthopaedic Trauma Institute, University of California, San Francisco (UCSF), San Francisco, CA
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Poly (glycerol sebacate) and polyhydroxybutyrate electrospun nanocomposite facilitates osteogenic differentiation of mesenchymal stem cells. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102796] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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29
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Na W, Kang MK, Park SH, Kim DY, Oh SY, Oh MS, Park S, Kang IIJ, Kang YH. Aesculetin Accelerates Osteoblast Differentiation and Matrix-Vesicle-Mediated Mineralization. Int J Mol Sci 2021; 22:ijms222212391. [PMID: 34830274 PMCID: PMC8621655 DOI: 10.3390/ijms222212391] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 11/14/2021] [Accepted: 11/15/2021] [Indexed: 12/13/2022] Open
Abstract
The imbalance between bone resorption and bone formation in favor of resorption results in bone loss and deterioration of bone architecture. Osteoblast differentiation is a sequential event accompanying biogenesis of matrix vesicles and mineralization of collagen matrix with hydroxyapatite crystals. Considerable efforts have been made in developing naturally-occurring plant compounds, preventing bone pathologies, or enhancing bone regeneration. Coumarin aesculetin inhibits osteoporosis through hampering the ruffled border formation of mature osteoclasts. However, little is known regarding the effects of aesculetin on the impairment of matrix vesicle biogenesis. MC3T3-E1 cells were cultured in differentiation media with 1–10 μM aesculetin for up to 21 days. Aesculetin boosted the bone morphogenetic protein-2 expression, and alkaline phosphatase activation of differentiating MC3T3-E1 cells. The presence of aesculetin strengthened the expression of collagen type 1 and osteoprotegerin and transcription of Runt-related transcription factor 2 in differentiating osteoblasts for 9 days. When ≥1–5 μM aesculetin was added to differentiating cells for 15–18 days, the induction of non-collagenous proteins of bone sialoprotein II, osteopontin, osteocalcin, and osteonectin was markedly enhanced, facilitating the formation of hydroxyapatite crystals and mineralized collagen matrix. The induction of annexin V and PHOSPHO 1 was further augmented in ≥5 μM aesculetin-treated differentiating osteoblasts for 21 days. In addition, the levels of tissue-nonspecific alkaline phosphatase and collagen type 1 were further enhanced within the extracellular space and on matrix vesicles of mature osteoblasts treated with aesculetin, indicating matrix vesicle-mediated bone mineralization. Finally, aesculetin markedly accelerated the production of thrombospondin-1 and tenascin C in mature osteoblasts, leading to their adhesion to preformed collagen matrix. Therefore, aesculetin enhanced osteoblast differentiation, and matrix vesicle biogenesis and mineralization. These findings suggest that aesculetin may be a potential osteo-inductive agent preventing bone pathologies or enhancing bone regeneration.
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Affiliation(s)
| | | | | | | | | | | | | | - II-Jun Kang
- Correspondence: (I.-J.K.); (Y.-H.K.); Tel.: +82-33-248-2135 (I.-J.K.); +82-33-248-2132 (Y.-H.K.)
| | - Young-Hee Kang
- Correspondence: (I.-J.K.); (Y.-H.K.); Tel.: +82-33-248-2135 (I.-J.K.); +82-33-248-2132 (Y.-H.K.)
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30
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Buccoliero C, Dicarlo M, Pignataro P, Gaccione F, Colucci S, Colaianni G, Grano M. The Novel Role of PGC1α in Bone Metabolism. Int J Mol Sci 2021; 22:ijms22094670. [PMID: 33925111 PMCID: PMC8124835 DOI: 10.3390/ijms22094670] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 04/26/2021] [Accepted: 04/27/2021] [Indexed: 12/19/2022] Open
Abstract
Peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC1α) is a protein that promotes transcription of numerous genes, particularly those responsible for the regulation of mitochondrial biogenesis. Evidence for a key role of PGC1α in bone metabolism is very recent. In vivo studies showed that PGC1α deletion negatively affects cortical thickness, trabecular organization and resistance to flexion, resulting in increased risk of fracture. Furthermore, in a mouse model of bone disease, PGC1α activation stimulates osteoblastic gene expression and inhibits atrogene transcription. PGC1α overexpression positively affects the activity of Sirtuin 3, a mitochondrial nicotinammide adenina dinucleotide (NAD)-dependent deacetylase, on osteoblastic differentiation. In vitro, PGC1α overexpression prevents the reduction of mitochondrial density, membrane potential and alkaline phosphatase activity caused by Sirtuin 3 knockdown in osteoblasts. Moreover, PGC1α influences the commitment of skeletal stem cells towards an osteogenic lineage, while negatively affects marrow adipose tissue accumulation. In this review, we will focus on recent findings about PGC1α action on bone metabolism, in vivo and in vitro, and in pathologies that cause bone loss, such as osteoporosis and type 2 diabetes.
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Affiliation(s)
- Cinzia Buccoliero
- Department of Emergency and Organ Transplantation, University of Bari, 70124 Bari, Italy; (C.B.); (P.P.); (F.G.); (G.C.)
| | - Manuela Dicarlo
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari, 70124 Bari, Italy; (M.D.); (S.C.)
| | - Patrizia Pignataro
- Department of Emergency and Organ Transplantation, University of Bari, 70124 Bari, Italy; (C.B.); (P.P.); (F.G.); (G.C.)
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari, 70124 Bari, Italy; (M.D.); (S.C.)
| | - Francesco Gaccione
- Department of Emergency and Organ Transplantation, University of Bari, 70124 Bari, Italy; (C.B.); (P.P.); (F.G.); (G.C.)
| | - Silvia Colucci
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari, 70124 Bari, Italy; (M.D.); (S.C.)
| | - Graziana Colaianni
- Department of Emergency and Organ Transplantation, University of Bari, 70124 Bari, Italy; (C.B.); (P.P.); (F.G.); (G.C.)
| | - Maria Grano
- Department of Emergency and Organ Transplantation, University of Bari, 70124 Bari, Italy; (C.B.); (P.P.); (F.G.); (G.C.)
- Correspondence:
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Deng Z, Lin Z, Zhong Q, Lu M, Fang H, Liu J, Duan L, Chen L, Wang L, Wang D, Li W. Interleukin 1 beta-induced chloride currents are important in osteoarthritis onset: an in vitro study. Acta Biochim Biophys Sin (Shanghai) 2021; 53:400-409. [PMID: 33677475 PMCID: PMC7996641 DOI: 10.1093/abbs/gmab010] [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: 07/19/2020] [Indexed: 12/14/2022] Open
Abstract
Persistent hypotonic and inflammatory conditions in the joint cavity can lead to the loss of cartilage matrix and cell death, which are the important mechanisms of osteoarthritis (OA) onset. Previous studies have confirmed that the existence of a hypotonic environment is a red flag for inflammation, as hypotonic environment induces the opening of the chloride channel of the cell and promotes chloride ion efflux, which prompts the cell volume to increase. Chloride channels play an important role in the regulation of mineralization and chondrocyte death. Here, we reported that OA chondrocytes showed a significant increase of cell death rate and the imbalance of cartilage matrix catabolism. We found that the distribution of skeleton protein F-actin was disordered. In addition, the volume-sensitive chloride current of OA chondrocytes decreased significantly with the increase of the expression levels of inflammation-related proteins caspase-1, caspase-3, and NLRP3. Moreover, interleukin-1β (IL-1β) showed a potential to activate the chloride current of normal chondrocytes. These results indicate that IL-1β-induced chloride channel opening in chondrocytes may be closely related to the occurrence of OA. This chloride channel opening process may therefore be a potential target for the treatment of OA.
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Affiliation(s)
- Zhiqin Deng
- Guangdong Provincial Research Center for Artificial Intelligence and Digital Orthopedic Technology, Hand and Foot Surgery Department, Shenzhen Second People’s Hospital (The First Hospital Affiliated to Shenzhen University), Shenzhen 518000, China
| | - Zicong Lin
- Guangdong Provincial Research Center for Artificial Intelligence and Digital Orthopedic Technology, Hand and Foot Surgery Department, Shenzhen Second People’s Hospital (The First Hospital Affiliated to Shenzhen University), Shenzhen 518000, China
| | - Qing Zhong
- Guangdong Provincial Research Center for Artificial Intelligence and Digital Orthopedic Technology, Hand and Foot Surgery Department, Shenzhen Second People’s Hospital (The First Hospital Affiliated to Shenzhen University), Shenzhen 518000, China
| | - Minqiang Lu
- Guangdong Provincial Research Center for Artificial Intelligence and Digital Orthopedic Technology, Hand and Foot Surgery Department, Shenzhen Second People’s Hospital (The First Hospital Affiliated to Shenzhen University), Shenzhen 518000, China
| | - Huankun Fang
- Guangdong Provincial Research Center for Artificial Intelligence and Digital Orthopedic Technology, Hand and Foot Surgery Department, Shenzhen Second People’s Hospital (The First Hospital Affiliated to Shenzhen University), Shenzhen 518000, China
| | - Jianquan Liu
- Guangdong Provincial Research Center for Artificial Intelligence and Digital Orthopedic Technology, Hand and Foot Surgery Department, Shenzhen Second People’s Hospital (The First Hospital Affiliated to Shenzhen University), Shenzhen 518000, China
| | - Li Duan
- Guangdong Provincial Research Center for Artificial Intelligence and Digital Orthopedic Technology, Hand and Foot Surgery Department, Shenzhen Second People’s Hospital (The First Hospital Affiliated to Shenzhen University), Shenzhen 518000, China
| | - Lixin Chen
- Department of Pharmacology, Medical College, Jinan University, Guangzhou 510632, China
| | - Liwei Wang
- Department of Physiology, Medical College, Jinan University, Guangzhou 510632, China
- International School, Jinan University, Guangzhou 510632, China
| | - Daping Wang
- Guangdong Provincial Research Center for Artificial Intelligence and Digital Orthopedic Technology, Hand and Foot Surgery Department, Shenzhen Second People’s Hospital (The First Hospital Affiliated to Shenzhen University), Shenzhen 518000, China
| | - Wencui Li
- Guangdong Provincial Research Center for Artificial Intelligence and Digital Orthopedic Technology, Hand and Foot Surgery Department, Shenzhen Second People’s Hospital (The First Hospital Affiliated to Shenzhen University), Shenzhen 518000, China
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Schlesinger PH, Braddock DT, Larrouture QC, Ray EC, Riazanski V, Nelson DJ, Tourkova IL, Blair HC. Phylogeny and chemistry of biological mineral transport. Bone 2020; 141:115621. [PMID: 32858255 PMCID: PMC7771281 DOI: 10.1016/j.bone.2020.115621] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 08/24/2020] [Accepted: 08/24/2020] [Indexed: 02/08/2023]
Abstract
Three physiologically mineralizing tissues - teeth, cartilage and bone - have critical common elements and important evolutionary relationships. Phylogenetically the most ancient densely mineralized tissue is teeth. In jawless fishes without skeletons, tooth formation included epithelial transport of phosphates, a process echoed later in bone physiology. Cartilage and mineralized cartilage are skeletal elements separate from bone, but with metabolic features common to bone. Cartilage mineralization is coordinated with high expression of tissue nonspecific alkaline phosphatase and PHOSPHO1 to harvest available phosphate esters and support mineralization of collagen secreted locally. Mineralization in true bone results from stochastic nucleation of hydroxyapatite crystals within the cross-linked collagen fibrils. Mineral accumulation in dense collagen is, at least in major part, mediated by amorphous aggregates - often called Posner clusters - of calcium and phosphate that are small enough to diffuse into collagen fibrils. Mineral accumulation in membrane vesicles is widely suggested, but does not correlate with a definitive stage of mineralization. Conversely mineral deposition at non-physiologic sites where calcium and phosphate are adequate has been shown to be regulated in large part by pyrophosphate. All of these elements are present in vertebrate bone metabolism. A key biological element of bone formation is an epithelial-like cellular organization which allows control of phosphate, calcium and pH during mineralization.
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Affiliation(s)
- Paul H Schlesinger
- Dept of Cell Biology, Washington University, Saint Louis, MO, United States of America
| | - Demetrios T Braddock
- Dept. of Pathology, Yale New Haven Hospital, 310 Cedar Street, New Haven, CT, United States of America
| | - Quitterie C Larrouture
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, Botnar Research Centre, Windmill Road, Oxford OX3 7LD, UK
| | - Evan C Ray
- Renal Electrolyte Division, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, United States of America
| | - Vladimir Riazanski
- Dept of Neurobiology, Pharmacology & Physiology, University of Chicago, Chicago, IL, United States of America
| | - Deborah J Nelson
- Dept of Neurobiology, Pharmacology & Physiology, University of Chicago, Chicago, IL, United States of America
| | - Irina L Tourkova
- Veteran's Affairs Medical Center, Pittsburgh PA and Department of Pathology, University of Pittsburgh, Pittsburgh, PA, United States of America
| | - Harry C Blair
- Veteran's Affairs Medical Center, Pittsburgh PA and Department of Pathology, University of Pittsburgh, Pittsburgh, PA, United States of America.
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