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Luptáková N, Dlouhý V, Sobola D, Fintová S, Weiser A, Beneš V, Dlouhý A. Interfaces between Cranial Bone and AISI 304 Steel after Long-Term Implantation: A Case Study of Cranial Screws. ACS Biomater Sci Eng 2024; 10:4297-4310. [PMID: 38900847 PMCID: PMC11234332 DOI: 10.1021/acsbiomaterials.4c00309] [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] [Indexed: 06/22/2024]
Abstract
Interfaces between AISI 304 stainless steel screws and cranial bone were investigated after long-term implantation lasting for 42 years. Samples containing the interface regions were analyzed using state-of-the-art analytical techniques including secondary ion mass, Fourier-transform infrared, Raman, and X-ray photoelectron spectroscopies. Local samples for scanning transmission electron microscopy were cut from the interface regions using the focused ion beam technique. A chemical composition across the interface was recorded in length scales covering micrometric and nanometric resolutions and relevant differences were found between peri-implant and the distant cranial bone, indicating generally younger bone tissue in the peri-implant area. Furthermore, the energy dispersive spectroscopy revealed an 80 nm thick steel surface layer enriched by oxygen suggesting that the AISI 304 material undergoes a corrosion attack. The attack is associated with transport of metallic ions, namely, ferrous and ferric iron, into the bone layer adjacent to the implant. The results comply with an anticipated interplay between released iron ions and osteoclast proliferation. The interplay gives rise to an autocatalytic process in which the iron ions stimulate the osteoclast activity while a formation of fresh bone resorption sites boosts the corrosion process through interactions between acidic osteoclast extracellular compartments and the implant surface. The autocatalytic process thus may account for an accelerated turnover of the peri-implant bone.
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Affiliation(s)
- Natália Luptáková
- Institute of Physics of Materials, AS CR, v. v. i., Žižkova 513/22, Brno 61662, Czech Republic
| | - Václav Dlouhý
- Department of Neurosurgery, Second Faculty of Medicine, Charles University and University Hospital Motol, V Úvalu 84, Prague 150 06, Czech Republic
| | - Dinara Sobola
- Institute of Physics of Materials, AS CR, v. v. i., Žižkova 513/22, Brno 61662, Czech Republic
| | - Stanislava Fintová
- Institute of Physics of Materials, AS CR, v. v. i., Žižkova 513/22, Brno 61662, Czech Republic
| | - Adam Weiser
- Institute of Physics of Materials, AS CR, v. v. i., Žižkova 513/22, Brno 61662, Czech Republic
| | - Vladimír Beneš
- Department of Neurosurgery, Second Faculty of Medicine, Charles University and University Hospital Motol, V Úvalu 84, Prague 150 06, Czech Republic
| | - Antonín Dlouhý
- Institute of Physics of Materials, AS CR, v. v. i., Žižkova 513/22, Brno 61662, Czech Republic
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2
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Li D, Liu C, Wang H, Li Y, Wang Y, An S, Sun S. The Role of Neuromodulation and Potential Mechanism in Regulating Heterotopic Ossification. Neurochem Res 2024; 49:1628-1642. [PMID: 38416374 DOI: 10.1007/s11064-024-04118-8] [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: 11/03/2023] [Revised: 01/17/2024] [Accepted: 01/28/2024] [Indexed: 02/29/2024]
Abstract
Heterotopic ossification (HO) is a pathological process characterized by the aberrant formation of bone in muscles and soft tissues. It is commonly triggered by traumatic brain injury, spinal cord injury, and burns. Despite a wide range of evidence underscoring the significance of neurogenic signals in proper bone remodeling, a clear understanding of HO induced by nerve injury remains rudimentary. Recent studies suggest that injury to the nervous system can activate various signaling pathways, such as TGF-β, leading to neurogenic HO through the release of neurotrophins. These pathophysiological changes lay a robust groundwork for the prevention and treatment of HO. In this review, we collected evidence to elucidate the mechanisms underlying the pathogenesis of HO related to nerve injury, aiming to enhance our understanding of how neurological repair processes can culminate in HO.
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Affiliation(s)
- Dengju Li
- Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
- Shandong First Medical University, Jinan, Shandong, China
| | - Changxing Liu
- Shandong Provincial Hospital, Shandong University, Jinan, Shandong, China
| | - Haojue Wang
- Shandong Provincial Hospital, Shandong University, Jinan, Shandong, China
| | - Yunfeng Li
- Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
| | - Yaqi Wang
- Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
| | - Senbo An
- Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China.
- Shandong First Medical University, Jinan, Shandong, China.
| | - Shui Sun
- Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China.
- Shandong First Medical University, Jinan, Shandong, China.
- Shandong Provincial Hospital, Shandong University, Jinan, Shandong, China.
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3
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Lademann F, Rijntjes E, Köhrle J, Tsourdi E, Hofbauer LC, Rauner M. Hyperthyroidism-driven bone loss depends on BMP receptor Bmpr1a expression in osteoblasts. Commun Biol 2024; 7:548. [PMID: 38719881 PMCID: PMC11078941 DOI: 10.1038/s42003-024-06227-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 04/22/2024] [Indexed: 05/12/2024] Open
Abstract
Hyperthyroidism is a well-known trigger of high bone turnover that can lead to the development of secondary osteoporosis. Previously, we have shown that blocking bone morphogenetic protein (BMP) signaling systemically with BMPR1A-Fc can prevent bone loss in hyperthyroid mice. To distinguish between bone cell type-specific effects, conditional knockout mice lacking Bmpr1a in either osteoclast precursors (LysM-Cre) or osteoprogenitors (Osx-Cre) were rendered hyperthyroid and their bone microarchitecture, strength and turnover were analyzed. While hyperthyroidism in osteoclast precursor-specific Bmpr1a knockout mice accelerated bone resorption leading to bone loss just as in wildtype mice, osteoprogenitor-specific Bmpr1a deletion prevented an increase of bone resorption and thus osteoporosis with hyperthyroidism. In vitro, wildtype but not Bmpr1a-deficient osteoblasts responded to thyroid hormone (TH) treatment with increased differentiation and activity. Furthermore, we found an elevated Rankl/Opg ratio with TH excess in osteoblasts and bone tissue from wildtype mice, but not in Bmpr1a knockouts. In line, expression of osteoclast marker genes increased when osteoclasts were treated with supernatants from TH-stimulated wildtype osteoblasts, in contrast to Bmpr1a-deficient cells. In conclusion, we identified the osteoblastic BMP receptor BMPR1A as a main driver of osteoporosis in hyperthyroid mice promoting TH-induced osteoblast activity and potentially its coupling to high osteoclastic resorption.
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Affiliation(s)
- Franziska Lademann
- Department of Medicine III & Center for Healthy Aging, Medical Faculty and University Hospital Carl Gustav Carus, Dresden University of Technology, Dresden, Germany
| | - Eddy Rijntjes
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt Universität zu Berlin, Institut für Experimentelle Endokrinologie, Berlin, Germany
| | - Josef Köhrle
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt Universität zu Berlin, Institut für Experimentelle Endokrinologie, Berlin, Germany
| | - Elena Tsourdi
- Department of Medicine III & Center for Healthy Aging, Medical Faculty and University Hospital Carl Gustav Carus, Dresden University of Technology, Dresden, Germany
| | - Lorenz C Hofbauer
- Department of Medicine III & Center for Healthy Aging, Medical Faculty and University Hospital Carl Gustav Carus, Dresden University of Technology, Dresden, Germany
| | - Martina Rauner
- Department of Medicine III & Center for Healthy Aging, Medical Faculty and University Hospital Carl Gustav Carus, Dresden University of Technology, Dresden, Germany.
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4
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Xue Y, Xu W, Zhao D, Du Z, Jiang H, Lv H, Zhang D, Yu Z, Cao Y, Han D. Biomimetic peroxidase MOF-Fe promotes bone defect repair by inhibiting TfR2 and activating the BMP2 pathway. Biol Direct 2024; 19:30. [PMID: 38654256 PMCID: PMC11036606 DOI: 10.1186/s13062-024-00473-2] [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: 02/23/2024] [Accepted: 04/06/2024] [Indexed: 04/25/2024] Open
Abstract
BACKGROUND Large bone defects pose a clinical treatment challenge; inhibiting transferrin receptor 2 (TfR2), which is involved in iron metabolism, can promote osteogenesis. Iron-based metal-organic frameworks (MOF-Fe) particles not only inhibit TfR2 but also serve as biomimetic catalysts to remove hydrogen peroxide in reactive oxygen species (ROS); excess ROS can disrupt the normal functions of osteoblasts, thereby hindering bone regeneration. This study explored the potential effects of MOF-Fe in increasing osteogenic activity and clearing ROS. METHODS In vitro experiments were performed to investigate the osteogenic effects of MOF-Fe particles and assess their impact on cellular ROS levels. To further validate the role of MOF-Fe in promoting bone defect repair, we injected MOF-Fe suspensions into the femoral defects of SD rats and implanted MOF-Fe-containing hydrogel scaffolds in rabbit cranial defect models and observed their effects on bone healing. RESULTS In vitro, the presence of MOF-Fe significantly increased the expression levels of osteogenesis-related genes and proteins compared to those in the control group. Additionally, compared to those in the untreated control group, the cells treated with MOF-Fe exhibited a significantly increased ability to remove hydrogen peroxide from ROS and generate oxygen and water within the physiological pH range. In vivo experiments further confirmed the positive effect of MOF-Fe in promoting bone defect repair. CONCLUSION This study supports the application of MOF-Fe as an agent for bone regeneration, particularly for mitigating ROS and activating the bone morphogenetic protein (BMP) pathway, demonstrating its potential value.
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Affiliation(s)
- Yaxin Xue
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Ninth People's Hospital, 639 Zhizaoju Road 200011, Shanghai, People's Republic of China
| | - Wei Xu
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Ninth People's Hospital, 639 Zhizaoju Road 200011, Shanghai, People's Republic of China
| | - Danyang Zhao
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Ninth People's Hospital, 639 Zhizaoju Road 200011, Shanghai, People's Republic of China
| | - Zijing Du
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Ninth People's Hospital, 639 Zhizaoju Road 200011, Shanghai, People's Republic of China
| | - Hao Jiang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Ninth People's Hospital, 639 Zhizaoju Road 200011, Shanghai, People's Republic of China
| | - Hao Lv
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Ninth People's Hospital, 639 Zhizaoju Road 200011, Shanghai, People's Republic of China
| | - Dong Zhang
- Engineering Research Center for Biomedical Materials of Ministry of Education, East China University of Science and Technology, 200237, Shanghai, P. R. China
| | - Zhencheng Yu
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Ninth People's Hospital, 639 Zhizaoju Road 200011, Shanghai, People's Republic of China
| | - Yi Cao
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Ninth People's Hospital, 639 Zhizaoju Road 200011, Shanghai, People's Republic of China.
| | - Dong Han
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Ninth People's Hospital, 639 Zhizaoju Road 200011, Shanghai, People's Republic of China.
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Ledesma-Colunga MG, Passin V, Vujic Spasic M, Hofbauer LC, Baschant U, Rauner M. Comparison of the effects of high dietary iron levels on bone microarchitecture responses in the mouse strains 129/Sv and C57BL/6J. Sci Rep 2024; 14:4887. [PMID: 38418857 PMCID: PMC10902348 DOI: 10.1038/s41598-024-55303-2] [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: 10/11/2023] [Accepted: 02/22/2024] [Indexed: 03/02/2024] Open
Abstract
Iron is an essential nutrient for all living organisms. Both iron deficiency and excess can be harmful. Bone, a highly metabolic active organ, is particularly sensitive to fluctuations in iron levels. In this study, we investigated the effects of dietary iron overload on bone homeostasis with a specific focus on two frequently utilized mouse strains: 129/Sv and C57BL/6J. Our findings revealed that after 6 weeks on an iron-rich diet, 129/Sv mice exhibited a decrease in trabecular and cortical bone density in both vertebral and femoral bones, which was linked to reduced bone turnover. In contrast, there was no evidence of bone changes associated with iron overload in age-matched C57BL/6J mice. Interestingly, 129/Sv mice exposed to an iron-rich diet during their prenatal development were protected from iron-induced bone loss, suggesting the presence of potential adaptive mechanisms. Overall, our study underscores the critical role of genetic background in modulating the effects of iron overload on bone health. This should be considered when studying effects of iron on bone.
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Affiliation(s)
- Maria G Ledesma-Colunga
- Department of Medicine III & Center for Healthy Aging, Medical Faculty and University Hospital Carl Gustav Carus, Dresden University of Technology, Dresden, Germany
| | - Vanessa Passin
- Department of Medicine III & Center for Healthy Aging, Medical Faculty and University Hospital Carl Gustav Carus, Dresden University of Technology, Dresden, Germany
| | - Maja Vujic Spasic
- Institute of Comparative Molecular Endocrinology, Ulm University, Ulm, Germany
| | - Lorenz C Hofbauer
- Department of Medicine III & Center for Healthy Aging, Medical Faculty and University Hospital Carl Gustav Carus, Dresden University of Technology, Dresden, Germany
| | - Ulrike Baschant
- Department of Medicine III & Center for Healthy Aging, Medical Faculty and University Hospital Carl Gustav Carus, Dresden University of Technology, Dresden, Germany
| | - Martina Rauner
- Department of Medicine III & Center for Healthy Aging, Medical Faculty and University Hospital Carl Gustav Carus, Dresden University of Technology, Dresden, Germany.
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Lösser L, Ledesma-Colunga MG, Andrés Sastre E, Scholtysek C, Hofbauer LC, Noack B, Baschant U, Rauner M. Transferrin receptor 2 mitigates periodontitis-driven alveolar bone loss. J Cell Physiol 2024; 239:e31172. [PMID: 38214117 DOI: 10.1002/jcp.31172] [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: 08/31/2023] [Revised: 11/29/2023] [Accepted: 12/06/2023] [Indexed: 01/13/2024]
Abstract
Periodontitis is associated with significant alveolar bone loss. Patients with iron overload suffer more frequently from periodontitis, however, the underlying mechanisms remain largely elusive. Here, we investigated the role of transferrin receptor 2 (Tfr2), one of the main regulators of iron homeostasis, in the pathogenesis of periodontitis and the dental phenotype under basal conditions in mice. As Tfr2 suppresses osteoclastogenesis, we hypothesized that deficiency of Tfr2 may exacerbate periodontitis-induced bone loss. Mice lacking Tfr2 (Tfr2-/- ) and wild-type (Tfr2+/+ ) littermates were challenged with experimental periodontitis. Mandibles and maxillae were collected for microcomputed tomography and histology analyses. Osteoclast cultures from Tfr2+/+ and Tfr2-/- mice were established and analyzed for differentiation efficiency, by performing messenger RNA expression and protein signaling pathways. After 8 days, Tfr2-deficient mice revealed a more severe course of periodontitis paralleled by higher immune cell infiltration and a higher histological inflammation index than Tfr2+/+ mice. Moreover, Tfr2-deficient mice lost more alveolar bone compared to Tfr2+/+ littermates, an effect that was only partially iron-dependent. Histological analysis revealed a higher number of osteoclasts in the alveolar bone of Tfr2-deficient mice. In line, Tfr2-deficient osteoclastic differentiation ex vivo was faster and more efficient as reflected by a higher number of osteoclasts, a higher expression of osteoclast markers, and an increased resorptive activity. Mechanistically, Tfr2-deficient osteoclasts showed a higher p38-MAPK signaling and inhibition of p38-MAPK signaling in Tfr2-deficient cells reverted osteoclast formation to Tfr2+/+ levels. Taken together, our data indicate that Tfr2 modulates the inflammatory response in periodontitis thereby mitigating effects on alveolar bone loss.
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Affiliation(s)
- Lennart Lösser
- Department of Medicine III & Center for Healthy Aging, Medical Faculty, Technische Universität Dresden, Dresden, Germany
| | - Maria G Ledesma-Colunga
- Department of Medicine III & Center for Healthy Aging, Medical Faculty, Technische Universität Dresden, Dresden, Germany
| | - Enrique Andrés Sastre
- Department of Medicine III & Center for Healthy Aging, Medical Faculty, Technische Universität Dresden, Dresden, Germany
| | - Carina Scholtysek
- Department of Internal Medicine 3, University of Erlangen-Nuremberg and Universitätsklinikum Erlangen, Erlangen, Germany
- Deutsches Zentrum für Immuntherapie (DZI), University of Erlangen-Nuremberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Lorenz C Hofbauer
- Department of Medicine III & Center for Healthy Aging, Medical Faculty, Technische Universität Dresden, Dresden, Germany
| | - Barbara Noack
- Policlinic of Operative Dentistry, Periodontology, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Ulrike Baschant
- Department of Medicine III & Center for Healthy Aging, Medical Faculty, Technische Universität Dresden, Dresden, Germany
| | - Martina Rauner
- Department of Medicine III & Center for Healthy Aging, Medical Faculty, Technische Universität Dresden, Dresden, Germany
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Robin F, Chappard D, Leroyer P, Latour C, Mabilleau G, Monbet V, Cavey T, Horeau M, Derbré F, Roth MP, Ropert M, Guggenbuhl P, Loréal O. Differences in bone microarchitecture between genetic and secondary iron-overload mouse models suggest a role for hepcidin deficiency in iron-related osteoporosis. FASEB J 2023; 37:e23245. [PMID: 37874260 DOI: 10.1096/fj.202301184r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/04/2023] [Accepted: 09/25/2023] [Indexed: 10/25/2023]
Abstract
Iron overload is one of the secondary osteoporosis etiologies. Cellular and molecular mechanisms involved in iron-related osteoporosis are not fully understood. AIM The aim of the study was to investigate the respective roles of iron excess and hepcidin, the systemic iron regulator, in the development of iron-related osteoporosis. MATERIAL AND METHODS We used mice models with genetic iron overload (GIO) related to hepcidin deficiency (Hfe-/- and Bmp6-/- ) and secondary iron overload (SIO) exhibiting a hepcidin increase secondary to iron excess. Iron concentration and transferrin saturation levels were evaluated in serum and hepatic, spleen, and bone iron concentrations were assessed by ICP-MS and Perl's staining. Gene expression was evaluated by quantitative RT-PCR. Bone micro-architecture was evaluated by micro-CT. The osteoblastic MC3T3 murine cells that are able to mineralize were exposed to iron and/or hepcidin. RESULTS Despite an increase of bone iron concentration in all overloaded mice models, bone volume/total volume (BV/TV) and trabecular thickness (Tb.Th) only decreased significantly in GIO, at 12 months for Hfe-/- and from 6 months for Bmp6-/- . Alterations in bone microarchitecture in the Bmp6-/- model were positively correlated with hepcidin levels (BV/TV (ρ = +.481, p < .05) and Tb.Th (ρ = +.690, p < .05). Iron deposits were detected in the bone trabeculae of Hfe-/- and Bmp6-/- mice, while iron deposits were mainly visible in bone marrow macrophages in secondary iron overload. In cell cultures, ferric ammonium citrate exposure abolished the mineralization process for concentrations above 5 μM, with a parallel decrease in osteocalcin, collagen 1, and alkaline phosphatase mRNA levels. Hepcidin supplementation of cells had a rescue effect on the collagen 1 and alkaline phosphatase expression level decrease. CONCLUSION Together, these data suggest that iron in excess alone is not sufficient to induce osteoporosis and that low hepcidin levels also contribute to the development of osteoporosis.
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Affiliation(s)
- François Robin
- INSERM, Univ Rennes, INRAE, CHU Rennes, U 1241, Institut NuMeCan (Nutrition Metabolisms and Cancer), Rennes, France
| | - Daniel Chappard
- GEROM, LHEA, IRIS-IBS Biology Institut, Angers cedex, France
| | - Patricia Leroyer
- INSERM, Univ Rennes, INRAE, CHU Rennes, U 1241, Institut NuMeCan (Nutrition Metabolisms and Cancer), Rennes, France
| | - Chloé Latour
- IRSD, Univ Toulouse, INSERM, INRAE, ENVT, UPS, Toulouse, France
| | - Guillaume Mabilleau
- Univ Angers, Nantes Université, Oniris, Inserm, RMeS, REGOS, SFR ICAT, Angers, France
| | | | - Thibault Cavey
- INSERM, Univ Rennes, INRAE, CHU Rennes, U 1241, Institut NuMeCan (Nutrition Metabolisms and Cancer), Rennes, France
| | - Mathieu Horeau
- INSERM, Univ Rennes, INRAE, CHU Rennes, U 1241, Institut NuMeCan (Nutrition Metabolisms and Cancer), Rennes, France
- Laboratory "Movement Sport and Health Sciences" EA7470, University of Rennes/ENS Rennes, Rennes, France
| | - Frédéric Derbré
- Laboratory "Movement Sport and Health Sciences" EA7470, University of Rennes/ENS Rennes, Rennes, France
| | | | - Martine Ropert
- INSERM, Univ Rennes, INRAE, CHU Rennes, U 1241, Institut NuMeCan (Nutrition Metabolisms and Cancer), Rennes, France
- AEM2 Platform, Univ Rennes, University Hospital, Rennes, France
| | - Pascal Guggenbuhl
- INSERM, Univ Rennes, INRAE, CHU Rennes, U 1241, Institut NuMeCan (Nutrition Metabolisms and Cancer), Rennes, France
| | - Olivier Loréal
- INSERM, Univ Rennes, INRAE, CHU Rennes, U 1241, Institut NuMeCan (Nutrition Metabolisms and Cancer), Rennes, France
- AEM2 Platform, Univ Rennes, University Hospital, Rennes, France
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Olivari V, Di Modica SM, Lidonnici MR, Aghajan M, Cordero-Sanchez C, Tanzi E, Pettinato M, Pagani A, Tiboni F, Silvestri L, Guo S, Ferrari G, Nai A. A single approach to targeting transferrin receptor 2 corrects iron and erythropoietic defects in murine models of anemia of inflammation and chronic kidney disease. Kidney Int 2023; 104:61-73. [PMID: 36990212 DOI: 10.1016/j.kint.2023.03.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 02/24/2023] [Accepted: 03/08/2023] [Indexed: 03/29/2023]
Abstract
Anemia is a common complication of systemic inflammation. Proinflammatory cytokines both decrease erythroblast sensitivity to erythropoietin (EPO) and increase the levels of the hepatic hormone hepcidin, sequestering iron in stores and causing functional iron deficiency. Anemia of chronic kidney disease (CKD) is a peculiar form of anemia of inflammation, characterized by impaired EPO production paralleling progressive kidney damage. Traditional therapy based on increased EPO (often in combination with iron) may have off-target effects due to EPO interaction with its non-erythroid receptors. Transferrin Receptor 2 (Tfr2) is a mediator of the iron-erythropoiesis crosstalk. Its deletion in the liver hampers hepcidin production, increasing iron absorption, whereas its deletion in the hematopoietic compartment increases erythroid EPO sensitivity and red blood cell production. Here, we show that selective hematopoietic Tfr2 deletion ameliorates anemia in mice with sterile inflammation in the presence of normal kidney function, promoting EPO responsiveness and erythropoiesis without increasing serum EPO levels. In mice with CKD, characterized by absolute rather than functional iron deficiency, Tfr2 hematopoietic deletion had a similar effect on erythropoiesis but anemia improvement was transient because of limited iron availability. Also, increasing iron levels by downregulating only hepatic Tfr2 had a minor effect on anemia. However, simultaneous deletion of hematopoietic and hepatic Tfr2, stimulating erythropoiesis and increased iron supply, was sufficient to ameliorate anemia for the entire protocol. Thus, our results suggest that combined targeting of hematopoietic and hepatic Tfr2 may be a therapeutic option to balance erythropoiesis stimulation and iron increase, without affecting EPO levels.
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Affiliation(s)
- Violante Olivari
- Regulation of Iron Metabolism Unit, Division of Genetics and Cell Biology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale San Raffaele, Milan, Italy; Vita-Salute San Raffaele University, Milan, Italy
| | - Simona Maria Di Modica
- Regulation of Iron Metabolism Unit, Division of Genetics and Cell Biology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale San Raffaele, Milan, Italy
| | - Maria Rosa Lidonnici
- Gene Transfer into Stem Cell Unit, SR-Tiget, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale San Raffaele, Milan, Italy
| | | | - Celia Cordero-Sanchez
- Regulation of Iron Metabolism Unit, Division of Genetics and Cell Biology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale San Raffaele, Milan, Italy
| | - Emanuele Tanzi
- Regulation of Iron Metabolism Unit, Division of Genetics and Cell Biology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale San Raffaele, Milan, Italy
| | - Mariateresa Pettinato
- Regulation of Iron Metabolism Unit, Division of Genetics and Cell Biology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale San Raffaele, Milan, Italy
| | - Alessia Pagani
- Regulation of Iron Metabolism Unit, Division of Genetics and Cell Biology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale San Raffaele, Milan, Italy
| | - Francesca Tiboni
- Gene Transfer into Stem Cell Unit, SR-Tiget, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale San Raffaele, Milan, Italy
| | - Laura Silvestri
- Regulation of Iron Metabolism Unit, Division of Genetics and Cell Biology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale San Raffaele, Milan, Italy; Vita-Salute San Raffaele University, Milan, Italy
| | - Shuling Guo
- Ionis Pharmaceuticals Inc., Carlsbad, California, USA
| | - Giuliana Ferrari
- Vita-Salute San Raffaele University, Milan, Italy; Gene Transfer into Stem Cell Unit, SR-Tiget, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale San Raffaele, Milan, Italy
| | - Antonella Nai
- Regulation of Iron Metabolism Unit, Division of Genetics and Cell Biology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale San Raffaele, Milan, Italy; Vita-Salute San Raffaele University, Milan, Italy.
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9
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Bao J, Yan Y, Zuo D, Zhuo Z, Sun T, Lin H, Han Z, Zhao Z, Yu H. Iron metabolism and ferroptosis in diabetic bone loss: from mechanism to therapy. Front Nutr 2023; 10:1178573. [PMID: 37215218 PMCID: PMC10196368 DOI: 10.3389/fnut.2023.1178573] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 04/07/2023] [Indexed: 05/24/2023] Open
Abstract
Osteoporosis, one of the most serious and common complications of diabetes, has affected the quality of life of a large number of people in recent years. Although there are many studies on the mechanism of diabetic osteoporosis, the information is still limited and there is no consensus. Recently, researchers have proven that osteoporosis induced by diabetes mellitus may be connected to an abnormal iron metabolism and ferroptosis inside cells under high glucose situations. However, there are no comprehensive reviews reported. Understanding these mechanisms has important implications for the development and treatment of diabetic osteoporosis. Therefore, this review elaborates on the changes in bones under high glucose conditions, the consequences of an elevated glucose microenvironment on the associated cells, the impact of high glucose conditions on the iron metabolism of the associated cells, and the signaling pathways of the cells that may contribute to diabetic bone loss in the presence of an abnormal iron metabolism. Lastly, we also elucidate and discuss the therapeutic targets of diabetic bone loss with relevant medications which provides some inspiration for its cure.
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Affiliation(s)
- Jiahao Bao
- Department of Oral & Cranio-maxillofacial Surgery, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China
| | - Yixuan Yan
- Guangdong Provincial Key Laboratory of Stomatology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, China
| | - Daihui Zuo
- Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
| | - Zhiyong Zhuo
- Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
| | - Tianhao Sun
- Shenzhen Key Laboratory for Innovative Technology in Orthopaedic Trauma, Guangdong Engineering Technology Research Center for Orthopaedic Trauma Repair, Department of Orthopaedics and Traumatology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Hongli Lin
- School of Public Health, The University of Hong Kong, Pok Fu Lam, Hong Kong SAR, China
| | - Zheshen Han
- School of Public Health, The University of Hong Kong, Pok Fu Lam, Hong Kong SAR, China
| | - Zhiyang Zhao
- Department of Oral & Cranio-maxillofacial Surgery, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China
| | - Hongbo Yu
- Department of Oral & Cranio-maxillofacial Surgery, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China
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10
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Chen Z, Ding W, Duan P, Lv X, Feng Y, Yin Z, Luo Z, Li Z, Zhang H, Zhou T, Tan H. HWJMSC-derived extracellular vesicles ameliorate IL-1β-induced chondrocyte injury through regulation of the BMP2/RUNX2 axis via up-regulation TFRC. Cell Signal 2023; 105:110604. [PMID: 36669606 DOI: 10.1016/j.cellsig.2023.110604] [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: 09/19/2022] [Revised: 12/29/2022] [Accepted: 01/15/2023] [Indexed: 01/19/2023]
Abstract
Articular osteochondral injury is a common and frequently occurring disease in orthopedics that is caused by aging, disease, and trauma. The cytokine interleukin-1β (IL-1β) is a crucial mediator of the inflammatory response, which exacerbates damage during chronic disease and acute tissue injury. Human Wharton's jelly mesenchymal stem cell (HWJMSC) extracellular vesicles (HWJMSC-EVs) have been shown to promote cartilage regeneration. The study aimed to investigate the influence and mechanisms of HWJMSC-EVs on the viability, apoptosis, and cell cycle of IL-1β-induced chondrocytes. HWJMSC-EVs were isolated by Ribo™ Exosome Isolation Reagent kit. Nanoparticle tracking analysis was used to determine the size and concentration of HWJMSC-EVs. We characterized HWJMSC-EVs by western blot and transmission electron microscope. The differentiation, viability, and protein level of chondrocytes were measured by Alcian blue staining, Cell Counting Kit-8, and western blot, respectively. Flow cytometer was used to determine apoptosis and cell cycle of chondrocytes. The results showed that HWJMSCs relieved IL-1β-induced chondrocyte injury by inhibiting apoptosis and elevating viability and cell cycle of chondrocyte, which was reversed with exosome inhibitor (GW4869). HWJMSC-EVs were successfully extracted and proven to be uptake by chondrocytes. HWJMSC-EVs ameliorate IL-1β-induced chondrocyte injury by inhibiting cell apoptosis and elevating viability and cycle of cell, but these effects were effectively reversed by knockdown of transferrin receptor (TFRC). Notably, using bone morphogenetic protein 2 (BMP2) pathway agonist and inhibitor suggested that HWJMSC-EVs ameliorate IL-1β-induced chondrocyte injury through activating the BMP2 pathway via up-regulation TFRC. Furthermore, over-expression of runt-related transcription factor 2 (RUNX2) reversed the effects of BMP2 pathway inhibitor promotion of IL-1β-induced chondrocyte injury. These results suggested that HWJMSC-EVs ameliorate IL-1β-induced chondrocyte injury by regulating the BMP2/RUNX2 axis via up-regulation TFRC. HWJMSC-EVs may play a new insight for early medical interventions in patients with articular osteochondral injury.
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Affiliation(s)
- Zhian Chen
- Graduate School, Kunming Medical University, Kunming City, Yunnan Province, China
| | - Wei Ding
- College of Medicine Technology, Yunnan Medical Health College, Kunming City, Yunnan Province, China
| | - Peiya Duan
- Department of Neurosurgery, The First People's Hospital of Yunnan Province, Kunming City, Yunnan Province, China
| | - Xiaoyu Lv
- Graduate School, Kunming Medical University, Kunming City, Yunnan Province, China
| | - Yujiao Feng
- Graduate School, Kunming Medical University, Kunming City, Yunnan Province, China
| | - Zhengbo Yin
- Graduate School, Kunming Medical University, Kunming City, Yunnan Province, China
| | - Zhihong Luo
- Department of Orthopaedics, People's Liberation Army Joint Logistic Support Force 920th Hospital, Kunming City, Yunnan Province, China
| | - Zhigui Li
- Department of Orthopaedics, People's Liberation Army Joint Logistic Support Force 920th Hospital, Kunming City, Yunnan Province, China
| | - Hua Zhang
- Department of Orthopaedics, People's Liberation Army Joint Logistic Support Force 920th Hospital, Kunming City, Yunnan Province, China
| | - Tianhua Zhou
- Department of Orthopaedics, People's Liberation Army Joint Logistic Support Force 920th Hospital, Kunming City, Yunnan Province, China.
| | - Hongbo Tan
- Department of Orthopaedics, People's Liberation Army Joint Logistic Support Force 920th Hospital, Kunming City, Yunnan Province, China.
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11
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Ledesma-Colunga MG, Baschant U, Weidner H, Alves TC, Mirtschink P, Hofbauer LC, Rauner M. Transferrin receptor 2 deficiency promotes macrophage polarization and inflammatory arthritis. Redox Biol 2023; 60:102616. [PMID: 36746004 PMCID: PMC9932570 DOI: 10.1016/j.redox.2023.102616] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 01/19/2023] [Accepted: 01/24/2023] [Indexed: 02/04/2023] Open
Abstract
OBJECTIVE Rheumatoid arthritis is an inflammatory joint disease in which synovial iron deposition has been described. Transferrin receptor 2 (Tfr2) represents a critical regulator of systemic iron levels. Loss of Tfr2 function in humans and mice results in iron overload. As iron contributes to inflammatory processes, we investigated whether Tfr2-deletion affects the pathogenesis of inflammatory arthritis in an iron-dependent manner. METHODS Using a global and conditional genetic disruption of Tfr2, we assessed the relevance of Tfr2 in K/BxN serum-transfer arthritis (STA) and macrophage polarization. RESULTS Male Tfr2-/- mice subjected to STA developed pronounced joint swelling, and bone erosion as compared to Tfr2+/+ littermate-controls (P < 0.01). Furthermore, an increase of neutrophils and macrophages/monocytes was observed in the inflammatory infiltrate within the paws of Tfr2-/- mice. To elucidate whether Tfr2 in myeloid cells has a direct role in the pathogenesis of arthritis or whether the effects were mediated via the systemic iron overload, we induced STA in Tfr2fl/fl-LysMCre + mice, which showed normal iron-loading. Cre + female mice displayed increased disease development compared to Cre-controls. As macrophages regulate iron availability and innate immunity, we hypothesized that Tfr2-deficiency would polarize macrophages toward a pro-inflammatory state (M1) that contributes to arthritis progression. In response to IFN-γ stimulation, Tfr2-/- macrophages showed increased expression of M1-like cytokines, IFN-γ-target genes, nitric-oxide production, and prolonged STAT1 activation compared to Tfr2+/+ macrophages (P < 0.01), while pre-treatment with ruxolitinib abolished Tfr2-driven M1-like polarization. CONCLUSION Taken together, these findings suggest a protective role of Tfr2 in macrophages on the progression of arthritis via suppression of M1-like polarization.
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Affiliation(s)
- Maria G Ledesma-Colunga
- Department of Medicine III and Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Ulrike Baschant
- Department of Medicine III and Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Heike Weidner
- Department of Medicine III and Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Tiago C Alves
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Peter Mirtschink
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Lorenz C Hofbauer
- Department of Medicine III and Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Martina Rauner
- Department of Medicine III and Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany.
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12
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Jaschke NP, Pählig S, Sinha A, Adolph TE, Colunga ML, Hofmann M, Wang A, Thiele S, Schwärzler J, Kleymann A, Gentzel M, Tilg H, Wielockx B, Hofbauer LC, Rauner M, Göbel A, Rachner TD. Dickkopf1 fuels inflammatory cytokine responses. Commun Biol 2022; 5:1391. [PMID: 36539532 PMCID: PMC9765382 DOI: 10.1038/s42003-022-04368-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 12/12/2022] [Indexed: 12/24/2022] Open
Abstract
Many human diseases, including cancer, share an inflammatory component but the molecular underpinnings remain incompletely understood. We report that physiological and pathological Dickkopf1 (DKK1) activity fuels inflammatory cytokine responses in cell models, mice and humans. DKK1 maintains the elevated inflammatory tone of cancer cells and is required for mounting cytokine responses following ligation of toll-like and cytokine receptors. DKK1-controlled inflammation derives from cell-autonomous mechanisms, which involve SOCS3-restricted, nuclear RelA (p65) activity. We translate these findings to humans by showing that genetic DKK1 variants are linked to elevated cytokine production across healthy populations. Finally, we find that genetic deletion of DKK1 but not pharmacological neutralization of soluble DKK1 ameliorates inflammation and disease trajectories in a mouse model of endotoxemia. Collectively, our study identifies a cell-autonomous function of DKK1 in the control of the inflammatory response, which is conserved between malignant and non-malignant cells. Additional studies are required to mechanistically dissect cellular DKK1 trafficking and signaling pathways.
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Affiliation(s)
- Nikolai P Jaschke
- Department of Medicine III & Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany.
| | - Sophie Pählig
- Department of Medicine III & Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Anupam Sinha
- Department of Medicine III & Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Timon E Adolph
- Department of Internal Medicine I, Gastroenterology, Hepatology, Endocrinology, and Metabolism, Innsbruck Medical University, Innsbruck, Austria
| | - Maria Ledesma Colunga
- Department of Medicine III & Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Maura Hofmann
- Department of Medicine III & Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Andrew Wang
- Department of Medicine (Rheumatology, Allergy & Immunology), Yale University School of Medicine, New Haven, CT, USA
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT, USA
| | - Sylvia Thiele
- Department of Medicine III & Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Julian Schwärzler
- Department of Internal Medicine I, Gastroenterology, Hepatology, Endocrinology, and Metabolism, Innsbruck Medical University, Innsbruck, Austria
| | - Alexander Kleymann
- Division of Rheumatology, Department of Medicine III, Technische Universität Dresden, Dresden, Germany
| | - Marc Gentzel
- Molecular Analysis - Mass Spectrometry, Center for Molecular and Cellular Bioengineering (CMCB), Technische Universität Dresden, Dresden, Germany
| | - Herbert Tilg
- Department of Internal Medicine I, Gastroenterology, Hepatology, Endocrinology, and Metabolism, Innsbruck Medical University, Innsbruck, Austria
| | - Ben Wielockx
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Lorenz C Hofbauer
- Department of Medicine III & Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Martina Rauner
- Department of Medicine III & Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Andy Göbel
- Department of Medicine III & Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Tilman D Rachner
- Department of Medicine III & Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
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13
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Baschant U, Altamura S, Steele-Perkins P, Muckenthaler MU, Spasić MV, Hofbauer LC, Steinbicker AU, Rauner M. Iron effects versus metabolic alterations in hereditary hemochromatosis driven bone loss. Trends Endocrinol Metab 2022; 33:652-663. [PMID: 35871125 DOI: 10.1016/j.tem.2022.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 06/08/2022] [Accepted: 06/26/2022] [Indexed: 11/18/2022]
Abstract
Hereditary hemochromatosis (HH) is a genetic disorder in which mutations affect systemic iron homeostasis. Most subtypes of HH result in low hepcidin levels and iron overload. Accumulation of iron in various tissues can lead to widespread organ damage and to various complications, including liver cirrhosis, arthritis, and diabetes. Osteoporosis is another frequent complication of HH, and the underlying mechanisms are poorly understood. Currently, it is unknown whether iron overload in HH directly damages bone or whether complications associated with HH, such as liver cirrhosis or hypogonadism, affect bone secondarily. This review summarizes current knowledge of bone metabolism in HH and highlights possible implications of metabolic dysfunction in HH-driven bone loss. We further discuss therapeutic considerations managing osteoporosis in HH.
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Affiliation(s)
- Ulrike Baschant
- Department of Medicine III & Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Sandro Altamura
- Department of Pediatric Hematology, Oncology and Immunology, University of Heidelberg, Heidelberg, Germany
| | - Peter Steele-Perkins
- Institute of Comparative Molecular Endocrinology, University of Ulm, Ulm, Germany
| | - Martina U Muckenthaler
- Department of Pediatric Hematology, Oncology and Immunology, University of Heidelberg, Heidelberg, Germany
| | - Maja Vujić Spasić
- Institute of Comparative Molecular Endocrinology, University of Ulm, Ulm, Germany
| | - Lorenz C Hofbauer
- Department of Medicine III & Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Andrea U Steinbicker
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
| | - Martina Rauner
- Department of Medicine III & Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany.
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14
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Penugurti V, Mishra YG, Manavathi B. AMPK: An odyssey of a metabolic regulator, a tumor suppressor, and now a contextual oncogene. Biochim Biophys Acta Rev Cancer 2022; 1877:188785. [PMID: 36031088 DOI: 10.1016/j.bbcan.2022.188785] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 08/21/2022] [Accepted: 08/22/2022] [Indexed: 11/29/2022]
Abstract
Metabolic reprogramming is a unique but complex biochemical adaptation that allows solid tumors to tolerate various stresses that challenge cancer cells for survival. Under conditions of metabolic stress, mammalian cells employ adenosine monophosphate (AMP)-activated protein kinase (AMPK) to regulate energy homeostasis by controlling cellular metabolism. AMPK has been described as a cellular energy sensor that communicates with various metabolic pathways and networks to maintain energy balance. Earlier studies characterized AMPK as a tumor suppressor in the context of cancer. Later, a paradigm shift occurred in support of the oncogenic nature of AMPK, considering it a contextual oncogene. In support of this, various cellular and mouse models of tumorigenesis and clinicopathological studies demonstrated increased AMPK activity in various cancers. This review will describe AMPK's pro-tumorigenic activity in various malignancies and explain the rationale and context for using AMPK inhibitors in combination with anti-metabolite drugs to treat AMPK-driven cancers.
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Affiliation(s)
- Vasudevarao Penugurti
- Molecular and Cellular Oncology Laboratory, Department of Biochemistry, School of Life Sciences, University of Hyderabad, Hyderabad 500046, Telangana, India
| | - Yasaswi Gayatri Mishra
- Molecular and Cellular Oncology Laboratory, Department of Biochemistry, School of Life Sciences, University of Hyderabad, Hyderabad 500046, Telangana, India
| | - Bramanandam Manavathi
- Molecular and Cellular Oncology Laboratory, Department of Biochemistry, School of Life Sciences, University of Hyderabad, Hyderabad 500046, Telangana, India.
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15
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Xie MZ, Liu JL, Gao QZ, Bo DY, Wang L, Zhou XC, Zhao MM, Zhang YC, Zhang YJ, Zhao GA, Jiao LY. Proteomics-based evaluation of the mechanism underlying vascular injury via DNA interstrand crosslinks, glutathione perturbation, mitogen-activated protein kinase, and Wnt and ErbB signaling pathways induced by crotonaldehyde. Clin Proteomics 2022; 19:33. [PMID: 36002804 PMCID: PMC9400244 DOI: 10.1186/s12014-022-09369-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 08/01/2022] [Indexed: 11/24/2022] Open
Abstract
Crotonaldehyde (CRA)—one of the major environmental pollutants from tobacco smoke and industrial pollution—is associated with vascular injury (VI). We used proteomics to systematically characterize the presently unclear molecular mechanism of VI and to identify new related targets or signaling pathways after exposure to CRA. Cell survival assays were used to assess DNA damage, whereas oxidative stress was determined using colorimetric assays and by quantitative fluorescence study; additionally, cyclooxygenase-2, mitogen-activated protein kinase pathways, Wnt3a, β-catenin, phospho-ErbB2, and phospho-ErbB4 were assessed using ELISA. Proteins were quantitated via tandem mass tag-based liquid chromatography-mass spectrometry and bioinformatics analyses, and 34 differentially expressed proteins were confirmed using parallel reaction monitoring, which were defined as new indicators related to the mechanism underlying DNA damage; glutathione perturbation; mitogen-activated protein kinase; and the Wnt and ErbB signaling pathways in VI based on Gene Ontology, Kyoto Encyclopedia of Genes and Genomes, and protein–protein interaction network analyses. Parallel reaction monitoring confirmed significant (p < 0.05) upregulation (> 1.5-fold change) of 23 proteins and downregulation (< 0.667-fold change) of 11. The mechanisms of DNA interstrand crosslinks; glutathione perturbation; mitogen-activated protein kinase; cyclooxygenase-2; and the Wnt and ErbB signaling pathways may contribute to VI through their roles in DNA damage, oxidative stress, inflammation, vascular dysfunction, endothelial dysfunction, vascular remodeling, coagulation cascade, and the newly determined signaling pathways. Moreover, the Wnt and ErbB signaling pathways were identified as new disease pathways involved in VI. Taken together, the elucidated underlying mechanisms may help broaden existing understanding of the molecular mechanisms of VI induced by CRA.
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Affiliation(s)
- Ming-Zhang Xie
- Department of Genetics, First Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453000, Henan, China.
| | - Jun-Li Liu
- Henan Key Laboratory of Neurorestoratology, Henan International Joint Laboratory of Neurorestoratology for Senile Dementia, The First Affiliated Hospital of Xinxiang Medical University, Weihui, 453100, Henan, People's Republic of China
| | - Qing-Zu Gao
- Department of Pathology, First Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453000, Henan, China
| | - De-Ying Bo
- Department of Laboratory, First Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453000, Henan, China
| | - Lei Wang
- Department of Laboratory, First Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453000, Henan, China
| | - Xiao-Chun Zhou
- Department of Genetics, First Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453000, Henan, China
| | - Meng-Meng Zhao
- Department of Genetics, First Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453000, Henan, China
| | - Yu-Chao Zhang
- Department of Genetics, First Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453000, Henan, China
| | - Yu-Jing Zhang
- Department of Genetics, First Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453000, Henan, China
| | - Guo-An Zhao
- Department of Cardiovascular, First Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453000, Henan, China.
| | - Lu-Yang Jiao
- Department of Laboratory, First Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453000, Henan, China.
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16
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Abstract
An abundant metal in the human body, iron is essential for key biological pathways including oxygen transport, DNA metabolism, and mitochondrial function. Most iron is bound to heme but it can also be incorporated into iron-sulfur clusters or bind directly to proteins. Iron's capacity to cycle between Fe2+ and Fe3+ contributes to its biological utility but also renders it toxic in excess. Heme is an iron-containing tetrapyrrole essential for diverse biological functions including gas transport and sensing, oxidative metabolism, and xenobiotic detoxification. Like iron, heme is essential yet toxic in excess. As such, both iron and heme homeostasis are tightly regulated. Here we discuss molecular and physiologic aspects of iron and heme metabolism. We focus on dietary absorption; cellular import; utilization; and export, recycling, and elimination, emphasizing studies published in recent years. We end with a discussion on current challenges and needs in the field of iron and heme biology.
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Affiliation(s)
- Sohini Dutt
- Department of Animal and Avian Sciences and Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland, USA
| | - Iqbal Hamza
- Department of Animal and Avian Sciences and Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland, USA
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17
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Yan C, Zhang J, An F, Wang J, Shi Y, Yuan L, Lv D, Zhao Y, Wang Y. Research Progress of Ferroptosis Regulatory Network and Bone Remodeling in Osteoporosis. Front Public Health 2022; 10:910675. [PMID: 35844870 PMCID: PMC9280046 DOI: 10.3389/fpubh.2022.910675] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 06/06/2022] [Indexed: 11/23/2022] Open
Abstract
Ferroptosis was induced the programmed cell death with iron overload Fenton reaction. Currently, ferroptosis has not been studied thoroughly. Existing studies have confirmed that ferroptosis involves the metabolisms of the Fe, lipids, amino acid, each mechanism is mutually independent but interrelated, and they are formed a complex regulatory network. Other evidence supports that ferroptosis is participated osteoporotic bone remodeling, predominantly affecting the interaction between bone formation and bone resorption, explicitly bone resorption exceeded bone formation. Based on previous studies, this review will summarize the regulatory network mechanism of ferroptosis on bone remodeling and reveal the role of ferroptosis in osteoporosis (OP).
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Affiliation(s)
- Chunlu Yan
- School of Traditional Chinese and Western Medicine, Gansu University of Chinese Medicine, Lanzhou, China
| | - Jinlong Zhang
- The First Clinical Medical College, Gansu University of Chinese Medicine, Lanzhou, China
| | - Fangyu An
- Teaching Experiment Training Center, Gansu University of Chinese Medicine, Lanzhou, China
| | - Jiayu Wang
- Teaching Experiment Training Center, Gansu University of Chinese Medicine, Lanzhou, China
| | - Yao Shi
- School of Basic Medicine, Gansu University of Chinese Medicine, Lanzhou, China
| | - Lingqing Yuan
- School of Basic Medicine, Gansu University of Chinese Medicine, Lanzhou, China
| | - Donghui Lv
- Teaching Experiment Training Center, Gansu University of Chinese Medicine, Lanzhou, China
| | - Yanzhen Zhao
- Teaching Experiment Training Center, Gansu University of Chinese Medicine, Lanzhou, China
| | - Yongfeng Wang
- School of Basic Medicine, Gansu University of Chinese Medicine, Lanzhou, China
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18
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Das BK, Wang L, Fujiwara T, Zhou J, Aykin-Burns N, Krager KJ, Lan R, Mackintosh SG, Edmondson R, Jennings ML, Wang X, Feng JQ, Barrientos T, Gogoi J, Kannan A, Gao L, Xing W, Mohan S, Zhao H. Transferrin receptor 1-mediated iron uptake regulates bone mass in mice via osteoclast mitochondria and cytoskeleton. eLife 2022; 11:73539. [PMID: 35758636 PMCID: PMC9352353 DOI: 10.7554/elife.73539] [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: 09/02/2021] [Accepted: 06/25/2022] [Indexed: 11/13/2022] Open
Abstract
Increased intracellular iron spurs mitochondrial biogenesis and respiration to satisfy high-energy demand during osteoclast differentiation and bone-resorbing activities. Transferrin receptor 1 (Tfr1) mediates cellular iron uptake through endocytosis of iron-loaded transferrin, and its expression increases during osteoclast differentiation. Nonetheless, the precise functions of Tfr1 and Tfr1-mediated iron uptake in osteoclast biology and skeletal homeostasis remain incompletely understood. To investigate the role of Tfr1 in osteoclast lineage cells in vivo and in vitro, we crossed Tfrc (encoding Tfr1)-floxed mice with Lyz2 (LysM)-Cre and Cathepsin K (Ctsk)-Cre mice to generate Tfrc conditional knockout mice in myeloid osteoclast precursors (Tfr1ΔLysM) or differentiated osteoclasts (Tfr1ΔCtsk), respectively. Skeletal phenotyping by µCT and histology unveiled a significant increase in trabecular bone mass with normal osteoclast number in long bones of 10-week-old young and 6-month-old adult female but not male Tfr1ΔLysM mice. Although high trabecular bone volume in long bones was observed in both male and female Tfr1ΔCtsk mice, this phenotype was more pronounced in female knockout mice. Consistent with this gender-dependent phenomena, estrogen deficiency induced by ovariectomy decreased trabecular bone mass in Tfr1ΔLysM mice. Mechanistically, disruption of Tfr1 expression attenuated mitochondrial metabolism and cytoskeletal organization in mature osteoclasts in vitro by attenuating mitochondrial respiration and activation of the Src-Rac1-WAVE regulatory complex axis, respectively, leading to decreased bone resorption with little impact on osteoclast differentiation. These results indicate that Tfr1-mediated iron uptake is specifically required for osteoclast function and is indispensable for bone remodeling in a gender-dependent manner.
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Affiliation(s)
- Bhaba K Das
- Long Beach VA Healthcare System, Southern California Institute for Research and Education, Long Beach, United States
| | - Lei Wang
- Department of Orthopedics, Anhui Medical University, Hefei, China
| | - Toshifumi Fujiwara
- Department of Orthopedic Surgery, Kyushu University Hospital, Fukuoka, Japan
| | - Jian Zhou
- Department of Orthopedics, Anhui Medical University, HeFei, China
| | - Nukhet Aykin-Burns
- Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, United States
| | - Kimberly J Krager
- Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, United States
| | - Renny Lan
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, United States
| | - Samuel G Mackintosh
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, United States
| | - Ricky Edmondson
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, United States
| | - Michael L Jennings
- Department of Physiology and Cell Biology, University of Arkansas for Medical Sciences, Little Rock, United States
| | - Xiaofang Wang
- Department of Biomedical Sciences, Texas A&M University, Dallas, United States
| | - Jian Q Feng
- Department of Biomedical Sciences, Texas A&M University, Dallas, United States
| | | | - Jyoti Gogoi
- Long Beach VA Healthcare System, Southern California Institute for Research and Education, Long Beach, United States
| | - Aarthi Kannan
- Long Beach VA Healthcare System, Southern California Institute for Research and Education, Long Beach, United States
| | - Ling Gao
- Long Beach VA Healthcare System, Southern California Institute for Research and Education, Long Beach, United States
| | - Weirong Xing
- Musculoskeletal Disease Center, VA Loma Linda Healthcare System, Loma Linda, United States
| | - Subburaman Mohan
- Musculoskeletal Disease Center, VA Loma Linda Healthcare System, Loma Linda, United States
| | - Haibo Zhao
- Long Beach VA Healthcare System, Southern California Institute for Research and Education, Long Beach, United States
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19
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Lademann F, Tsourdi E, Hofbauer LC, Rauner M. Bone cell-specific deletion of thyroid hormone transporter Mct8 distinctly regulates bone volume in young versus adult male mice. Bone 2022; 159:116375. [PMID: 35240348 DOI: 10.1016/j.bone.2022.116375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 02/22/2022] [Accepted: 02/23/2022] [Indexed: 12/23/2022]
Abstract
Thyroid hormones are critical regulators of bone metabolism. Their cellular import is guided through transporter proteins, including the monocarboxylate transporter 8 (MCT8). Conditional Mct8 knockout in osteoblast and osteoclast precursors leads to trabecular bone gain in 12-week-old male mice. Given that thyroid hormones regulate both skeletal development and bone maintenance, we investigated the effect of bone cell-specific Mct8 deletion in 6-week-old (young) and 24-week-old (adult) male mice. Mct8 ablation in osteoclast precursors led to trabecular bone gain at the spine in 6-week-old animals compared to age-matched controls, whereas adult animals displayed a shift towards trabecular bone loss in both femur and vertebra. Mct8 deficiency in osteoprogenitors increased osteoblast numbers and trabecular bone mass at the spine of young mice, without skeletal differences between adult knockout mice and littermate controls. In contrast, young mice lacking Mct8 in late osteoblasts/osteocytes exhibited lower trabecular bone volume at the spine and femur compared to respective controls, but no differences were detected at 24 weeks of age. In vitro studies of osteoblasts with Dmp1-Cre promotor driven Mct8 deletion showed no significant alterations of osteogenic marker gene expression and mineralization capacity suggesting that MCT8 is not crucial for osteoblast maturation. Overall, we observed mild effects with conditional Mct8 knockout on bone microarchitecture and bone turnover especially during growth implying a secondary role for MCT8 as a thyroid hormone transporter in bone.
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Affiliation(s)
- Franziska Lademann
- Department of Medicine III and Center for Healthy Aging, Technische Universität Dresden, Germany
| | - Elena Tsourdi
- Department of Medicine III and Center for Healthy Aging, Technische Universität Dresden, Germany
| | - Lorenz C Hofbauer
- Department of Medicine III and Center for Healthy Aging, Technische Universität Dresden, Germany
| | - Martina Rauner
- Department of Medicine III and Center for Healthy Aging, Technische Universität Dresden, Germany.
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20
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The mutual crosstalk between iron and erythropoiesis. Int J Hematol 2022; 116:182-191. [PMID: 35618957 DOI: 10.1007/s12185-022-03384-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 04/26/2022] [Accepted: 05/06/2022] [Indexed: 02/08/2023]
Abstract
Iron homeostasis and erythropoiesis are strongly interconnected. On one side iron is essential to terminal erythropoiesis for hemoglobin production, on the other erythropoiesis may increase iron absorption through the production of erythroferrone, the erythroid hormone that suppresses hepcidin expression Also erythropoietin production is modulated by iron through the iron regulatory proteins-iron responsive elements that control the hypoxia inducible factor 2-α. The second transferrin receptor, an iron sensor both in the liver and in erythroid cells modulates erythropoietin sensitivity and is a further link between hepcidin and erythropoiesis. When erythropoietin is decreased in iron deficiency the erythropoietin sensitivity is increased because the second transferrin receptor is removed from cell surface. A deranged balance between erythropoiesis and iron/hepcidin may lead to anemia, as in the case of iron deficiency, defective iron uptake and erythroid utilization or subnormal recycling. Defective control of hepcidin production may cause iron deficiency, as in the recessive disorder iron refractory iron deficiency anemia or in anemia of inflammation, or in iron loading anemias, which are characterized by excessive but ineffective erythropoiesis. The elucidation of the mechanisms that regulates iron homeostasis and erythropoiesis is leading to the development of drugs for the benefit of both iron and erythropoiesis disorders.
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21
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Li Y, Miller I, Prasad P, George NA, Parrow NL, Fleming RE. Effects of Exogenous Transferrin on the Regulation of Iron Metabolism and Erythropoiesis in Iron Deficiency With or Without Anemia. Front Physiol 2022; 13:893149. [PMID: 35634155 PMCID: PMC9132588 DOI: 10.3389/fphys.2022.893149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 04/19/2022] [Indexed: 11/13/2022] Open
Abstract
Erythropoietic response is controlled not only by erythropoietin but also by iron. In addition to its role in iron delivery, transferrin also functions as a signaling molecule, with effects on both iron homeostasis and erythropoiesis. We investigated hematologic parameters, iron status and expression of key proteins, including the hepatic iron regulatory protein hepcidin and the suppressive erythroid factor Erfe, in mice subject to dietary iron deficiency with and without anemia. The acute effect of iron on these parameters was investigated by administration of exogenous iron-loaded transferrin (holoTf) in each of the mouse models. Serum iron in mice with iron deficiency (ID) is modestly lower with hematologic parameters maintained by utilization of iron stores in mice with ID. As expected, erythropoietin expression and concentration, along with marrow Erfe are unaffected in ID mice. Administration of holoTf restores serum iron and Tf saturation levels to those observed in control mice and results in an increase in hepcidin compared to ID mice not treated with holoTf. The expression of the Bmp signaling molecule Bmp6 is not significantly increased following Tf treatment in ID mice. Thus, the expression level of the gene encoding hepcidin, Hamp1, is increased relative to Bmp6 expression in ID mice following treatment with holoTf, leading us to speculate that Tf saturation may influence Bmp sensitivity. In mice with iron deficiency anemia (IDA), decreased hematologic parameters were accompanied by pronounced decreases in serum and tissue iron concentrations, and an increase in serum erythropoietin. In the absence of exogenous holoTf, the greater serum erythropoietin was not reflected by an increase in marrow Erfe expression. HoloTf administration did not acutely change serum Epo in IDA mice. Marrow Erfe expression was, however, markedly increased in IDA mice following holoTf, plausibly accounting for the lack of an increase in Hamp1 following holoTf treatment in the IDA mice. The increase in Erfe despite no change in erythropoietin suggests that Tf acts to increase erythropoietin sensitivity. These observations underscore the importance of Tf in modulating the erythropoietic response in recovery from iron deficiency anemia, with implications for other stress erythropoiesis conditions.
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Affiliation(s)
- Yihang Li
- Department of Pediatrics, Saint Louis University School of Medicine, St. Louis, MO, United States
| | - Ian Miller
- Department of Pediatrics, Saint Louis University School of Medicine, St. Louis, MO, United States
| | - Princy Prasad
- Department of Pediatrics, Saint Louis University School of Medicine, St. Louis, MO, United States
| | - Nisha Ajit George
- Department of Pediatrics, Saint Louis University School of Medicine, St. Louis, MO, United States
| | - Nermi L. Parrow
- Department of Pediatrics, Saint Louis University School of Medicine, St. Louis, MO, United States
| | - Robert E. Fleming
- Department of Pediatrics, Saint Louis University School of Medicine, St. Louis, MO, United States
- Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO, United States
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22
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Novel Insights and Future Perspective in Iron Metabolism and Anemia. Metabolites 2022; 12:metabo12020138. [PMID: 35208213 PMCID: PMC8879443 DOI: 10.3390/metabo12020138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 01/29/2022] [Indexed: 11/30/2022] Open
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23
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Lin J, Huang J, Wu J, Tang B, Li C, Xiao H. Poly(lactic acid-co-glycolic acid)-based celecoxib extended-release microspheres for the local treatment of traumatic heterotopic ossification. J Biomater Appl 2022; 36:1458-1468. [PMID: 35043696 DOI: 10.1177/08853282211056937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Traumatic heterotopic ossification (THO) is a serious and common clinical post-traumatic complication for which there is no effective and safe drug treatment. Routine administration of nonsteroidal anti-inflammatory drugs (NSAIDs) after injury is extensively used approach for THO. However, serious adverse events can occur in the event of an overdose of NSAIDs. In our study, we have developed a poly(lactic acid-co-glycolic acid) (PLGA) microsphere by emulsifying solvent volatilization for the prolonged slow delivery of celecoxib (CLX). Three groups of celecoxib-poly(lactic acid-co-glycolic acid) microspheres (CLX-PLGA MPs) were prepared with particle sizes of 3.75±1.28 μm, 49.56±17.15 μm, and 94.98±42.53 μm. Meanwhile, related parameters of microspheres in each group were studied: drug loading (DL), encapsulation rate (EE), and slow-release behavior. The DL and EE of the 3 CLX-PLGA MPs did not vary significantly, and subsequently, we selected the second drug loading microspheres with a retardation period of about 70 days for subsequent experiments. Moreover, cellular and animal experiments suggest that the microspheres are biocompatible and can be safely applied to localized trauma tissue. Finally, it is demonstrated that CLX-PLGA MPs have an effect on inhibiting the osteogenic differentiation of bone marrow mesenchymal stem cells and have the potential to inhibit ectopic bone formation of the THO model in Sprague-Dawley rat. Therefore, this study suggests that CLX-PLGA MPs are expected to be applied topically in the early post-traumatic period to prevent the development of THO.
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Affiliation(s)
- Jialiang Lin
- The Third Clinical Medical College of Southern Medical University, Guangzhou, China
| | - Junchao Huang
- Medical College of Anhui University of Science and Technology, Huainan, China
| | - Jiang Wu
- Tinglin Hospital of Jinshan District, Shanghai, China
| | - Bo Tang
- The Third Clinical Medical College of Southern Medical University, Guangzhou, China
| | - Congbin Li
- Medical College of Anhui University of Science and Technology, Huainan, China
| | - Haijun Xiao
- Affiliated Fengxian Hospital to Southern Medical University, Shanghai, China
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24
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Rauner M, Murray M, Thiele S, Watts D, Neumann D, Gabet Y, Hofbauer LC, Wielockx B. Epo/EpoR signaling in osteoprogenitor cells is essential for bone homeostasis and Epo-induced bone loss. Bone Res 2021; 9:42. [PMID: 34518518 PMCID: PMC8437981 DOI: 10.1038/s41413-021-00157-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 03/05/2021] [Accepted: 04/20/2021] [Indexed: 11/09/2022] Open
Abstract
High erythropoietin (Epo) levels are detrimental to bone health in adult organisms. Adult mice receiving high doses of Epo lose bone mass due to suppressed bone formation and increased bone resorption. In humans, high serum Epo levels are linked to fractures in elderly men. Our earlier studies indicated that Epo modulates osteoblast activity; however, direct evidence that Epo acts via its receptor (EpoR) on osteoblasts in vivo is still missing. Here, we created mice lacking EpoR in osteoprogenitor cells to specifically address this gap. Deletion of EpoR in osteoprogenitors (EpoR:Osx-cre, cKO) starting at 5 weeks of age did not alter red blood cell parameters but increased vertebral bone volume by 25% in 12-week-old female mice. This was associated with low bone turnover. Histological (osteoblast number, bone formation rate) and serum (P1NP, osteocalcin) bone formation parameters were all reduced, as were the number of osteoclasts and TRAP serum level. Differentiation of osteoblast precursors isolated from cKO versus control mice resulted in lower expression of osteoblast marker genes including Runx2, Alp, and Col1a1 on day 21, whereas the mineralization capacity was similar. Moreover, the RANKL/OPG ratio, which determines the osteoclast-supporting potential of osteoblasts, was substantially decreased by 50%. Similarly, coculturing cKO osteoblasts with control or cKO osteoclast precursors produced significantly fewer osteoclasts than coculture with control osteoblasts. Finally, exposing female mice to Epo pumps (10 U·d−1) for 4 weeks resulted in trabecular bone loss (−25%) and increased osteoclast numbers (1.7-fold) in control mice only, not in cKO mice. Our data show that EpoR in osteoprogenitors is essential in regulating osteoblast function and osteoblast-mediated osteoclastogenesis via the RANKL/OPG axis. Thus, osteogenic Epo/EpoR signaling controls bone mass maintenance and contributes to Epo-induced bone loss.
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Affiliation(s)
- Martina Rauner
- Department of Medicine III & Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany.
| | - Marta Murray
- Institute for Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Sylvia Thiele
- Department of Medicine III & Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Deepika Watts
- Institute for Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Drorit Neumann
- Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Yankel Gabet
- Department of Anatomy & Anthropology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Lorenz C Hofbauer
- Department of Medicine III & Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Ben Wielockx
- Institute for Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany.
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25
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Berezovsky B, Báječný M, Frýdlová J, Gurieva I, Rogalsky DW, Přikryl P, Pospíšil V, Nečas E, Vokurka M, Krijt J. Effect of Erythropoietin on the Expression of Murine Transferrin Receptor 2. Int J Mol Sci 2021; 22:ijms22158209. [PMID: 34360974 PMCID: PMC8348427 DOI: 10.3390/ijms22158209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 07/27/2021] [Accepted: 07/28/2021] [Indexed: 01/14/2023] Open
Abstract
Erythropoietin (EPO) downregulates hepcidin expression to increase the availability of iron; the downregulation of hepcidin is mediated by erythroferrone (ERFE) secreted by erythroblasts. Erythroblasts also express transferrin receptor 2 (TFR2); however, the possible role of TFR2 in hepcidin downregulation is unclear. The purpose of the study was to correlate liver expression of hepcidin with the expression of ERFE and TFR2 in murine bone marrow and spleen at 4, 16, 24, 48, 72 and 96 h following administration of a single dose of EPO. Splenic Fam132b expression increased 4 h after EPO injection; liver hepcidin mRNA was decreased at 16 h. In the spleen, expression of TFR2 and transferrin receptor (TFR1) proteins increased by an order of magnitude at 48 and 72 h after EPO treatment. The EPO-induced increase in splenic TFR2 and TFR1 was associated with an increase in the number of Tfr2- and Tfr1-expressing erythroblasts. Plasma exosomes prepared from EPO-treated mice displayed increased amount of TFR1 protein; however, no exosomal TFR2 was detected. Overall, the results confirm the importance of ERFE in stress erythropoiesis, support the role of TFR2 in erythroid cell development, and highlight possible differences in the removal of TFR2 and TFR1 from erythroid cell membranes.
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26
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The critical roles of iron during the journey from fetus to adolescent: Developmental aspects of iron homeostasis. Blood Rev 2021; 50:100866. [PMID: 34284901 DOI: 10.1016/j.blre.2021.100866] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 06/28/2021] [Accepted: 07/01/2021] [Indexed: 12/12/2022]
Abstract
Iron is indispensable for human life. However, it is also potentially toxic, since it catalyzes the formation of harmful oxidative radicals in unbound form and may facilitate pathogen growth. Therefore, iron homeostasis needs to be tightly regulated. Rapid growth and development require large amounts of iron, while (especially young) children are vulnerable to infections with iron-dependent pathogens due to an immature immune system. Moreover, unbalanced iron status early in life may have effects on the nervous system, immune system and gut microbiota that persist into adulthood. In this narrative review, we assess the critical roles of iron for growth and development and elaborate how the body adapts to physiologically high iron demands during the journey from fetus to adolescent. As a first step towards the development of clinical guidelines for the management of iron disorders in children, we summarize the unmet needs regarding the developmental aspects of iron homeostasis.
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27
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Ledesma-Colunga MG, Weidner H, Vujic Spasic M, Hofbauer LC, Baschant U, Rauner M. Shaping the bone through iron and iron-related proteins. Semin Hematol 2021; 58:188-200. [PMID: 34389111 DOI: 10.1053/j.seminhematol.2021.06.002] [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: 02/26/2021] [Revised: 05/18/2021] [Accepted: 06/08/2021] [Indexed: 01/04/2023]
Abstract
Well-controlled iron levels are indispensable for health. Iron deficiency is the most common cause of anemia, whereas iron overload, either hereditary or secondary due to disorders of ineffective erythropoiesis, causes widespread organ failure. Bone is particularly sensitive to fluctuations in systemic iron levels as both iron deficiency and overload are associated with low bone mineral density and fragility. Recent studies have shown that not only iron itself, but also iron-regulatory proteins that are mutated in hereditary hemochromatosis can control bone mass. This review will summarize the current knowledge on the effects of iron on bone homeostasis and bone cell activities, and on the role of proteins that regulate iron homeostasis, i.e. hemochromatosis proteins and proteins of the bone morphogenetic protein pathway, on bone remodeling. As disorders of iron homeostasis are closely linked to bone fragility, deeper insights into common regulatory mechanisms may provide new opportunities to concurrently treat disorders affecting iron homeostasis and bone.
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Affiliation(s)
- Maria G Ledesma-Colunga
- Divisions of Endocrinology and Molecular Bone Biology, Department of Medicine III & University Center for Healty Aging, Technische Universität Dresden, Dresden, Germany
| | - Heike Weidner
- Divisions of Endocrinology and Molecular Bone Biology, Department of Medicine III & University Center for Healty Aging, Technische Universität Dresden, Dresden, Germany
| | - Maja Vujic Spasic
- Institute of Comparative Molecular Endocrinology, Ulm University, Ulm, Germany
| | - Lorenz C Hofbauer
- Divisions of Endocrinology and Molecular Bone Biology, Department of Medicine III & University Center for Healty Aging, Technische Universität Dresden, Dresden, Germany
| | - Ulrike Baschant
- Divisions of Endocrinology and Molecular Bone Biology, Department of Medicine III & University Center for Healty Aging, Technische Universität Dresden, Dresden, Germany
| | - Martina Rauner
- Divisions of Endocrinology and Molecular Bone Biology, Department of Medicine III & University Center for Healty Aging, Technische Universität Dresden, Dresden, Germany.
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28
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Silvestri L, Nai A. Iron and erythropoiesis: A mutual alliance. Semin Hematol 2021; 58:145-152. [PMID: 34389106 DOI: 10.1053/j.seminhematol.2021.05.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 05/26/2021] [Accepted: 05/31/2021] [Indexed: 02/07/2023]
Abstract
The large amount of iron required for hemoglobin synthesis keeps iron homeostasis and erythropoiesis inter-connected, both iron levels being affected by increased erythropoiesis, and erythropoiesis regulated by serum iron. The connection between these 2 processes is maintained even when erythropoiesis is ineffective. In the last years great advances in the understanding of the mechanisms of this crosstalk have been achieved thanks to the discovery of 2 essential players: hepcidin, the master regulator of iron homeostasis, and erythroferrone, the long sought erythroid regulator. In addition, how circulating transferrin-bound iron contributes to the crosstalk between the 2 systems has started to be unraveled.
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Affiliation(s)
- Laura Silvestri
- Regulation of Iron Metabolism Unit-Div. Genetics & Cell Biology-IRCCS San Raffaele Scientific Institute, Milano, Italy; San Raffaele Vita-Salute University, Milano, Italy.
| | - Antonella Nai
- Regulation of Iron Metabolism Unit-Div. Genetics & Cell Biology-IRCCS San Raffaele Scientific Institute, Milano, Italy; San Raffaele Vita-Salute University, Milano, Italy
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29
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Colucci S, Marques O, Altamura S. 20 years of Hepcidin: How far we have come. Semin Hematol 2021; 58:132-144. [PMID: 34389105 DOI: 10.1053/j.seminhematol.2021.05.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 05/12/2021] [Accepted: 05/31/2021] [Indexed: 12/20/2022]
Abstract
Twenty years ago the discovery of hepcidin deeply changed our understanding of the regulation of systemic iron homeostasis. It is now clear that hepcidin orchestrates systemic iron levels by controlling the amount of iron exported into the bloodstream through ferroportin. Hepcidin expression is increased in situations where systemic iron levels should be reduced, such as in iron overload and infection. Conversely, hepcidin is repressed during iron deficiency, hypoxia or expanded erythropoiesis, to increase systemic iron availability and sustain erythropoiesis. In this review, we will focus on molecular mechanisms of hepcidin regulation and on the pathological consequences of their disruption.
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Affiliation(s)
- Silvia Colucci
- Department of Pediatric Hematology, Oncology and Immunology - University of Heidelberg, Heidelberg, Germany.; Molecular Medicine Partnership Unit, EMBL and University of Heidelberg, Heidelberg, Germany
| | - Oriana Marques
- Department of Pediatric Hematology, Oncology and Immunology - University of Heidelberg, Heidelberg, Germany.; Molecular Medicine Partnership Unit, EMBL and University of Heidelberg, Heidelberg, Germany
| | - Sandro Altamura
- Department of Pediatric Hematology, Oncology and Immunology - University of Heidelberg, Heidelberg, Germany.; Molecular Medicine Partnership Unit, EMBL and University of Heidelberg, Heidelberg, Germany..
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30
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Castro-Mollo M, Gera S, Ruiz-Martinez M, Feola M, Gumerova A, Planoutene M, Clementelli C, Sangkhae V, Casu C, Kim SM, Ostland V, Han H, Nemeth E, Fleming R, Rivella S, Lizneva D, Yuen T, Zaidi M, Ginzburg Y. The hepcidin regulator erythroferrone is a new member of the erythropoiesis-iron-bone circuitry. eLife 2021; 10:e68217. [PMID: 34002695 PMCID: PMC8205482 DOI: 10.7554/elife.68217] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 05/17/2021] [Indexed: 01/19/2023] Open
Abstract
Background Erythroblast erythroferrone (ERFE) secretion inhibits hepcidin expression by sequestering several bone morphogenetic protein (BMP) family members to increase iron availability for erythropoiesis. Methods To address whether ERFE functions also in bone and whether the mechanism of ERFE action in bone involves BMPs, we utilize the Erfe-/- mouse model as well as β-thalassemic (Hbbth3/+) mice with systemic loss of ERFE expression. In additional, we employ comprehensive skeletal phenotyping analyses as well as functional assays in vitro to address mechanistically the function of ERFE in bone. Results We report that ERFE expression in osteoblasts is higher compared with erythroblasts, is independent of erythropoietin, and functional in suppressing hepatocyte hepcidin expression. Erfe-/- mice display low-bone-mass arising from increased bone resorption despite a concomitant increase in bone formation. Consistently, Erfe-/- osteoblasts exhibit enhanced mineralization, Sost and Rankl expression, and BMP-mediated signaling ex vivo. The ERFE effect on osteoclasts is mediated through increased osteoblastic RANKL and sclerostin expression, increasing osteoclastogenesis in Erfe-/- mice. Importantly, Erfe loss in Hbbth3/+mice, a disease model with increased ERFE expression, triggers profound osteoclastic bone resorption and bone loss. Conclusions Together, ERFE exerts an osteoprotective effect by modulating BMP signaling in osteoblasts, decreasing RANKL production to limit osteoclastogenesis, and prevents excessive bone loss during expanded erythropoiesis in β-thalassemia. Funding YZG acknowledges the support of the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) (R01 DK107670 to YZG and DK095112 to RF, SR, and YZG). MZ acknowledges the support of the National Institute on Aging (U19 AG60917) and NIDDK (R01 DK113627). TY acknowledges the support of the National Institute on Aging (R01 AG71870). SR acknowledges the support of NIDDK (R01 DK090554) and Commonwealth Universal Research Enhancement (CURE) Program Pennsylvania.
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Affiliation(s)
- Melanie Castro-Mollo
- Division of Hematology Oncology, Tisch Cancer Institute, Icahn School of Medicine at Mount SinaiNew YorkUnited States
| | - Sakshi Gera
- The Mount Sinai Bone Program, Departments of Medicine and Pharmacological Sciences, and Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount SinaiNew YorkUnited States
| | - Marc Ruiz-Martinez
- Division of Hematology Oncology, Tisch Cancer Institute, Icahn School of Medicine at Mount SinaiNew YorkUnited States
| | - Maria Feola
- Division of Hematology Oncology, Tisch Cancer Institute, Icahn School of Medicine at Mount SinaiNew YorkUnited States
| | - Anisa Gumerova
- The Mount Sinai Bone Program, Departments of Medicine and Pharmacological Sciences, and Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount SinaiNew YorkUnited States
| | - Marina Planoutene
- Division of Hematology Oncology, Tisch Cancer Institute, Icahn School of Medicine at Mount SinaiNew YorkUnited States
| | - Cara Clementelli
- Division of Hematology Oncology, Tisch Cancer Institute, Icahn School of Medicine at Mount SinaiNew YorkUnited States
| | - Veena Sangkhae
- Center for Iron Disorders, University of California, Los Angeles (UCLA)Los AngelesUnited States
| | - Carla Casu
- Department of Pediatrics, Division of Hematology, and Penn Center for Musculoskeletal Disorders, Children’s Hospital of Philadelphia (CHOP), University of Pennsylvania, Perelman School of MedicinePhiladelphiaUnited States
| | - Se-Min Kim
- The Mount Sinai Bone Program, Departments of Medicine and Pharmacological Sciences, and Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount SinaiNew YorkUnited States
| | | | - Huiling Han
- Intrinsic Lifesciences, LLCLaJollaUnited States
| | - Elizabeta Nemeth
- Center for Iron Disorders, University of California, Los Angeles (UCLA)Los AngelesUnited States
| | - Robert Fleming
- Department of Pediatrics, Saint Louis University School of MedicineSt LouisUnited States
| | - Stefano Rivella
- Department of Pediatrics, Division of Hematology, and Penn Center for Musculoskeletal Disorders, Children’s Hospital of Philadelphia (CHOP), University of Pennsylvania, Perelman School of MedicinePhiladelphiaUnited States
| | - Daria Lizneva
- The Mount Sinai Bone Program, Departments of Medicine and Pharmacological Sciences, and Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount SinaiNew YorkUnited States
| | - Tony Yuen
- The Mount Sinai Bone Program, Departments of Medicine and Pharmacological Sciences, and Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount SinaiNew YorkUnited States
| | - Mone Zaidi
- The Mount Sinai Bone Program, Departments of Medicine and Pharmacological Sciences, and Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount SinaiNew YorkUnited States
| | - Yelena Ginzburg
- Division of Hematology Oncology, Tisch Cancer Institute, Icahn School of Medicine at Mount SinaiNew YorkUnited States
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31
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Histone modifications centric-regulation in osteogenic differentiation. Cell Death Dis 2021; 7:91. [PMID: 33941771 PMCID: PMC8093204 DOI: 10.1038/s41420-021-00472-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 03/21/2021] [Accepted: 04/07/2021] [Indexed: 02/03/2023]
Abstract
Histone modification critically contributes to the epigenetic control of gene expression by changing the configuration of chromatin and modifying the access of transcription factors to gene promoters. Recently, we observed that histone acetylation and crotonylation mediated the expression of endocytosis-related genes and tumor-related immune checkpoint genes by regulating the enrichment of signal transducer and activator of transcription 3 on these gene promoters in Alzheimer's disease and tumorigenesis, suggesting that histone modification plays an important role in disease development. Furthermore, studies performed in the past decade revealed that histone modifications affect osteogenic differentiation by regulating the expression of osteogenic marker genes. In this review, we summarize and discuss the histone modification-centric regulation of osteogenic gene expression. This review improves the understanding of the role of histone modifications in osteogenic differentiation and describes its potential as a therapeutic target for osteogenic differentiation-related diseases.
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32
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Musculoskeletal complications associated with pathological iron toxicity and its molecular mechanisms. Biochem Soc Trans 2021; 49:747-759. [PMID: 33929529 DOI: 10.1042/bst20200672] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 04/12/2021] [Accepted: 04/13/2021] [Indexed: 12/25/2022]
Abstract
Iron is fundamental for several biological functions, but when in excess can lead to the development of toxic events. Some tissues and cells are more susceptible than others, but systemic iron levels can be controlled by treating patients with iron-chelating molecules and phlebotomy. An early diagnostic can be decisive to limit the progression of musculoskeletal complications like osteoarthritis and osteoporosis because of iron toxicity. In iron-related osteoarthritis, aggravation can be associated to a few events that can contribute to joints articular cartilage exposure to high iron concentrations, which can promote articular degeneration with very little chance of tissue regeneration. In contrast, bone metabolism is much more dynamic than cartilage, but progressive iron accumulation and ageing can be decisive factors for bone health. The iron overload associated with hereditary diseases like hemochromatosis, hemophilias, thalassemias and other hereditary anaemias increase the negative impact of iron toxicity in joints and bone, as well as in life quality, even when iron levels can be controlled. The molecular mechanisms by which iron can compromise cartilage and bone have been illusive and only in the last 20 years studies have started to shed some light into the molecular mechanisms associated with iron toxicity. Ferroptosis and the regulation of intracellular iron levels is instrumental in the balance between detoxification and induced cell death. In addition, these complications are accompanied with multiple susceptibility factors that can aggravate iron toxicity and should be identified. Therefore, understanding tissues microenvironment and cell communication is fundamental to contextualize iron toxicity.
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33
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Zhang H, Wang A, Shen G, Wang X, Liu G, Yang F, Chen B, Wang M, Xu Y. Hepcidin-induced reduction in iron content and PGC-1β expression negatively regulates osteoclast differentiation to play a protective role in postmenopausal osteoporosis. Aging (Albany NY) 2021; 13:11296-11314. [PMID: 33820875 PMCID: PMC8109081 DOI: 10.18632/aging.202817] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Accepted: 11/30/2020] [Indexed: 12/20/2022]
Abstract
As a necessary trace element, iron is involved in many physiological processes. Clinical and basic studies have found that disturbances in iron metabolism, especially iron overload, might lead to bone loss and even be involved in postmenopausal osteoporosis. Hepcidin is a key regulator of iron homeostasis. However, the exact role of hepcidin in bone metabolism and the underlying mechanism remain unknown. In this study, we found that in postmenopausal osteoporosis cohort, the concentration of hepcidin in the serum was significantly reduced and positively correlated with bone mineral density. Ovariectomized (OVX) mice were then used to construct an osteoporosis model. Hepcidin overexpression in these mice significantly improved bone mass and rescued the phenotype of bone loss. Additionally, overexpression of hepcidin in OVX mice greatly reduced the number and differentiation of osteoclasts in vivo and in vitro. This study found that overexpression of hepcidin significantly inhibited ROS production, mitochondrial biogenesis, and PGC-1β expression. These data showed that hepcidin protected osteoporosis by reducing iron levels in bone tissue, and in conjunction with PGC-1β, reduced ROS production and the number of mitochondria, thus inhibiting osteoclast differentiation and bone absorption. Hepcidin could provide new targets for the clinical treatment of postmenopausal osteoporosis.
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Affiliation(s)
- Hui Zhang
- Department of Orthopaedics, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
- Institute of Osteoporosis Diagnosis and Treatments of Soochow University, Suzhou 215004, China
| | - Aifei Wang
- Department of Orthopaedics, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
- Institute of Osteoporosis Diagnosis and Treatments of Soochow University, Suzhou 215004, China
| | - Guangsi Shen
- Department of Orthopaedics, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
| | - Xiao Wang
- Department of Orthopaedics, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
- Institute of Osteoporosis Diagnosis and Treatments of Soochow University, Suzhou 215004, China
| | - Gongwen Liu
- Department of Orthopaedics, Suzhou TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Suzhou 215004, China
| | - Fan Yang
- Department of Orthopaedics, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
- Institute of Osteoporosis Diagnosis and Treatments of Soochow University, Suzhou 215004, China
| | - Bin Chen
- Department of Orthopaedics, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
- Osteoporosis Clinical Center, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
- Institute of Osteoporosis Diagnosis and Treatments of Soochow University, Suzhou 215004, China
| | - Mingyong Wang
- Institute of Osteoporosis Diagnosis and Treatments of Soochow University, Suzhou 215004, China
| | - Youjia Xu
- Department of Orthopaedics, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
- Osteoporosis Clinical Center, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
- Institute of Osteoporosis Diagnosis and Treatments of Soochow University, Suzhou 215004, China
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34
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Preferential uptake of antibody targeted calcium phosphosilicate nanoparticles by metastatic triple negative breast cancer cells in co-cultures of human metastatic breast cancer cells plus bone osteoblasts. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2021; 34:102383. [PMID: 33722692 DOI: 10.1016/j.nano.2021.102383] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 01/29/2021] [Accepted: 03/02/2021] [Indexed: 11/21/2022]
Abstract
Calcium phosphosilicate nanoparticles (CPSNPs) are bioresorbable nanoparticles that can be bioconjugated with targeting molecules and encapsulate active agents and deliver them to tumor cells without causing damage to adjacent healthy tissue. Data obtained in this study demonstrated that an anti-CD71 antibody on CPSNPs targets these nanoparticles and enhances their internalization by triple negative breast cancer cells in-vitro. Caspase 3,7 activation, DNA damage, and fluorescent microscopy confirmed the apoptotic breast cancer response caused by targeted anti-CD71-CPSNPs encapsulated with gemcitabine monophosphate, the active metabolite of the chemotherapeutic gemcitabine used to treat cancers including breast and ovarian. Targeted anti-CD71-CPSNPs encapsulated with the fluorophore, Rhodamine WT, were preferentially internalized by breast cancer cells in co-cultures with osteoblasts. While osteoblasts partially internalized anti-CD71-GemMP-CPSNPs, their cell growth was not affected. These results suggest that CPSNPs may be used as imaging tools and selective drug delivery systems for breast cancer that has metastasized to bone.
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35
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Butterfield NC, Curry KF, Steinberg J, Dewhurst H, Komla-Ebri D, Mannan NS, Adoum AT, Leitch VD, Logan JG, Waung JA, Ghirardello E, Southam L, Youlten SE, Wilkinson JM, McAninch EA, Vancollie VE, Kussy F, White JK, Lelliott CJ, Adams DJ, Jacques R, Bianco AC, Boyde A, Zeggini E, Croucher PI, Williams GR, Bassett JHD. Accelerating functional gene discovery in osteoarthritis. Nat Commun 2021; 12:467. [PMID: 33473114 PMCID: PMC7817695 DOI: 10.1038/s41467-020-20761-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Accepted: 12/14/2020] [Indexed: 01/29/2023] Open
Abstract
Osteoarthritis causes debilitating pain and disability, resulting in a considerable socioeconomic burden, yet no drugs are available that prevent disease onset or progression. Here, we develop, validate and use rapid-throughput imaging techniques to identify abnormal joint phenotypes in randomly selected mutant mice generated by the International Knockout Mouse Consortium. We identify 14 genes with functional involvement in osteoarthritis pathogenesis, including the homeobox gene Pitx1, and functionally characterize 6 candidate human osteoarthritis genes in mouse models. We demonstrate sensitivity of the methods by identifying age-related degenerative joint damage in wild-type mice. Finally, we phenotype previously generated mutant mice with an osteoarthritis-associated polymorphism in the Dio2 gene by CRISPR/Cas9 genome editing and demonstrate a protective role in disease onset with public health implications. We hope this expanding resource of mutant mice will accelerate functional gene discovery in osteoarthritis and offer drug discovery opportunities for this common, incapacitating chronic disease.
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Affiliation(s)
- Natalie C Butterfield
- Molecular Endocrinology Laboratory, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, W12 0NN, UK
| | - Katherine F Curry
- Molecular Endocrinology Laboratory, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, W12 0NN, UK
| | - Julia Steinberg
- Institute of Translational Genomics, Helmholtz Zentrum München - German Research Center for Environmental Health, 85764, Neuherberg, Germany
- Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1SA, UK
- Cancer Council NSW, Sydney, NSW, 2000, Australia
| | - Hannah Dewhurst
- Molecular Endocrinology Laboratory, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, W12 0NN, UK
| | - Davide Komla-Ebri
- Molecular Endocrinology Laboratory, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, W12 0NN, UK
| | - Naila S Mannan
- Molecular Endocrinology Laboratory, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, W12 0NN, UK
| | - Anne-Tounsia Adoum
- Molecular Endocrinology Laboratory, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, W12 0NN, UK
| | - Victoria D Leitch
- Molecular Endocrinology Laboratory, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, W12 0NN, UK
| | - John G Logan
- Molecular Endocrinology Laboratory, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, W12 0NN, UK
| | - Julian A Waung
- Molecular Endocrinology Laboratory, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, W12 0NN, UK
| | - Elena Ghirardello
- Molecular Endocrinology Laboratory, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, W12 0NN, UK
| | - Lorraine Southam
- Institute of Translational Genomics, Helmholtz Zentrum München - German Research Center for Environmental Health, 85764, Neuherberg, Germany
- Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1SA, UK
| | - Scott E Youlten
- The Garvan Institute of Medical Research and St. Vincent's Clinical School, University of New South Wales Medicine, Sydney, NSW, 2010, Australia
| | - J Mark Wilkinson
- Department of Oncology and Metabolism, University of Sheffield, Sheffield, S10 2RX, UK
- Centre for Integrated Research into Musculoskeletal Ageing and Sheffield Healthy Lifespan Institute, University of Sheffield, Sheffield, S10 2TN, UK
| | - Elizabeth A McAninch
- Division of Endocrinology and Metabolism, Rush University Medical Center, Chicago, IL, 60612, USA
| | | | - Fiona Kussy
- Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1SA, UK
| | - Jacqueline K White
- Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1SA, UK
- The Jackson Laboratory, Bar Harbor, ME, 04609, USA
| | | | - David J Adams
- Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1SA, UK
| | - Richard Jacques
- School of Health and Related Research (ScHARR), University of Sheffield, Sheffield, S1 4DA, UK
| | - Antonio C Bianco
- Section of Adult and Pediatric Endocrinology, Diabetes & Metabolism, Department of Medicine, University of Chicago, Chicago, IL, 60637, USA
| | - Alan Boyde
- Dental Physical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS, UK
| | - Eleftheria Zeggini
- Institute of Translational Genomics, Helmholtz Zentrum München - German Research Center for Environmental Health, 85764, Neuherberg, Germany
- Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1SA, UK
| | - Peter I Croucher
- The Garvan Institute of Medical Research and St. Vincent's Clinical School, University of New South Wales Medicine, Sydney, NSW, 2010, Australia
| | - Graham R Williams
- Molecular Endocrinology Laboratory, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, W12 0NN, UK.
| | - J H Duncan Bassett
- Molecular Endocrinology Laboratory, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, W12 0NN, UK.
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36
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Richard C, Verdier F. Transferrin Receptors in Erythropoiesis. Int J Mol Sci 2020; 21:ijms21249713. [PMID: 33352721 PMCID: PMC7766611 DOI: 10.3390/ijms21249713] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 12/16/2020] [Accepted: 12/17/2020] [Indexed: 12/15/2022] Open
Abstract
Erythropoiesis is a highly dynamic process giving rise to red blood cells from hematopoietic stem cells present in the bone marrow. Red blood cells transport oxygen to tissues thanks to the hemoglobin comprised of α- and β-globin chains and of iron-containing hemes. Erythropoiesis is the most iron-consuming process to support hemoglobin production. Iron delivery is mediated via transferrin internalization by the endocytosis of transferrin receptor type 1 (TFR1), one of the most abundant membrane proteins of erythroblasts. A second transferrin receptor—TFR2—associates with the erythropoietin receptor and has been implicated in the regulation of erythropoiesis. In erythroblasts, both transferrin receptors adopt peculiarities such as an erythroid-specific regulation of TFR1 and a trafficking pathway reliant on TFR2 for iron. This review reports both trafficking and signaling functions of these receptors and reassesses the debated role of TFR2 in erythropoiesis in the light of recent findings. Potential therapeutic uses targeting the transferrin-TFR1 axis or TFR2 in hematological disorders are also discussed.
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Affiliation(s)
- Cyrielle Richard
- Inserm U1016, CNRS UMR8104, Institut Cochin, Université de Paris, 75014 Paris, France;
- Laboratoire d’excellence GR-Ex, Université de Paris, 75014 Paris, France
| | - Frédérique Verdier
- Inserm U1016, CNRS UMR8104, Institut Cochin, Université de Paris, 75014 Paris, France;
- Laboratoire d’excellence GR-Ex, Université de Paris, 75014 Paris, France
- Correspondence:
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37
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Traeger L, Schnittker J, Dogan DY, Oguama D, Kuhlmann T, Muckenthaler MU, Krijt J, Urzica EI, Steinbicker AU. HFE and ALK3 act in the same signaling pathway. Free Radic Biol Med 2020; 160:501-505. [PMID: 32861780 DOI: 10.1016/j.freeradbiomed.2020.08.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 08/21/2020] [Indexed: 12/27/2022]
Abstract
Hepcidin deficiency leads to iron overload by increased dietary iron uptake and iron release from storage cells. The most frequent mutation in Hfe leads to reduced hepcidin expression and thereby causes iron overload. Recent findings suggested that HFE activates hepcidin expression predominantly via the BMP type I receptor ALK3. Here, we investigated whether HFE exclusively utilizes ALK3 or other signaling mechanisms also. We generated mice with double deficiency of Hfe and hepatocyte-specific Alk3 and compared the iron overload phenotypes of these double knockout mice to single hepatocyte-specific Alk3 deficient or Hfe knockout mice. Double Hfe-/-/hepatic Alk3fl/fl;Alb-Cre knockouts develop a similar iron overload phenotype compared to single hepatocyte-specific Alk3 deficient mice hallmarked by serum iron levels, tissue iron content and hepcidin levels of similar grades. HFE protein levels were increased in Alk3fl/fl;Alb-Cre mice compared to Alk3fl/fl mice, which was caused by iron overload - and not by Alk3 deficiency. The data provide evidence by genetic means that 1. HFE exclusively uses the BMP type I receptor ALK3 to induce hepcidin expression and 2. HFE protein expression is induced by iron overload, which further emphasizes the iron sensing function of HFE.
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Affiliation(s)
- L Traeger
- Department of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Muenster, University of Muenster, Muenster, Germany.
| | - J Schnittker
- Department of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Muenster, University of Muenster, Muenster, Germany.
| | - D Y Dogan
- Department of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Muenster, University of Muenster, Muenster, Germany.
| | - D Oguama
- Department of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Muenster, University of Muenster, Muenster, Germany.
| | - T Kuhlmann
- Institute of Neuropathology, University Hospital Muenster, University of Muenster, Muenster, Germany.
| | - M U Muckenthaler
- Department of Pediatric Oncology, Hematology and Immunology, Molecular Medicine Partnership (MMPU), European Molecular Biology Laboratory (EMBL), University of Heidelberg, Heidelberg, Germany.
| | - J Krijt
- Institute of Pathological Physiology, First Faculty of Medicine, Charles University, Prague, Czech Republic.
| | - E I Urzica
- Department of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Muenster, University of Muenster, Muenster, Germany.
| | - A U Steinbicker
- Department of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Muenster, University of Muenster, Muenster, Germany.
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38
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Pagani A, Pettinato M, Colucci S, Dulja A, Rauner M, Nai A, Camaschella C, Altamura S, Muckenthaler MU, Silvestri L. Hemochromatosis proteins are dispensable for the acute hepcidin response to BMP2. Haematologica 2020; 105:e493. [PMID: 33054090 PMCID: PMC7556651 DOI: 10.3324/haematol.2019.241984] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Alessia Pagani
- Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan, Italy
| | - Mariateresa Pettinato
- Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan, Italy
| | - Silvia Colucci
- Department of Pediatric Hematology, Oncology and Immunology, University of Heidelberg, Germany
| | - Alessandro Dulja
- Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan, Italy
| | - Martina Rauner
- Department of Medicine III, Technische Universitat Dresden, Dresden, Germany
| | - Antonella Nai
- Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan, Italy
| | - Clara Camaschella
- Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan, Italy
| | - Sandro Altamura
- Department of Pediatric Hematology, Oncology and Immunology, University of Heidelberg, Germany
| | - Martina U Muckenthaler
- Department of Pediatric Hematology, Oncology and Immunology, University of Heidelberg, Germany
| | - Laura Silvestri
- Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan, Italy
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39
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Altamura S, Marques O, Colucci S, Mertens C, Alikhanyan K, Muckenthaler MU. Regulation of iron homeostasis: Lessons from mouse models. Mol Aspects Med 2020; 75:100872. [DOI: 10.1016/j.mam.2020.100872] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 06/28/2020] [Accepted: 07/02/2020] [Indexed: 12/13/2022]
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40
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Lademann F, Weidner H, Tsourdi E, Kumar R, Rijntjes E, Köhrle J, Hofbauer LC, Rauner M. Disruption of BMP Signaling Prevents Hyperthyroidism-Induced Bone Loss in Male Mice. J Bone Miner Res 2020; 35:2058-2069. [PMID: 32453466 DOI: 10.1002/jbmr.4092] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 05/14/2020] [Accepted: 05/15/2020] [Indexed: 12/14/2022]
Abstract
Thyroid hormones (TH) are key regulators of bone health, and TH excess in mice causes high bone turnover-mediated bone loss. However, the underlying molecular mechanisms of TH actions on bone remain poorly defined. Here, we tested the hypothesis whether TH mediate their effects via the pro-osteogenic bone morphogenetic protein (BMP) signaling pathway in vitro and in vivo. Primary murine osteoblasts treated with 3,3',5-triiodo-L-thyronine (T3 ) showed an enhanced differentiation potential, which was associated with activated canonical BMP/SMAD signaling reflected by SMAD1/5/8 phosphorylation. Blocking BMP signaling at the receptor (LDN193189) and ligand level (noggin, anti-BMP2/BMP4 neutralizing antibodies) inhibited T3 -induced osteogenic differentiation. In vivo, TH excess over 4 weeks in male C57BL/6JRj mice led to severe trabecular bone loss with a high bone turnover that was completely prevented by treatment with the BMP ligand scavenger ALK3-Fc. Thus, TH activate the canonical BMP pathway in osteoblasts to promote their differentiation and function. Importantly, this study indicates that blocking the BMP pathway may be an effective strategy to treat hyperthyroidism-induced bone loss. © 2020 The Authors. Journal of Bone and Mineral Research published by American Society for Bone and Mineral Research.
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Affiliation(s)
- Franziska Lademann
- Department of Medicine III, Universitätsklinikum Dresden, Technische Universität Dresden, Dresden, Germany.,Center for Healthy Aging, Universitätsklinikum Dresden, Technische Universität Dresden, Dresden, Germany
| | - Heike Weidner
- Department of Medicine III, Universitätsklinikum Dresden, Technische Universität Dresden, Dresden, Germany.,Center for Healthy Aging, Universitätsklinikum Dresden, Technische Universität Dresden, Dresden, Germany
| | - Elena Tsourdi
- Department of Medicine III, Universitätsklinikum Dresden, Technische Universität Dresden, Dresden, Germany.,Center for Healthy Aging, Universitätsklinikum Dresden, Technische Universität Dresden, Dresden, Germany
| | - Ravi Kumar
- Acceleron Pharma, Inc, Cambridge, MA, USA
| | - Eddy Rijntjes
- Institut für Experimentelle Endokrinologie, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Josef Köhrle
- Institut für Experimentelle Endokrinologie, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Lorenz C Hofbauer
- Department of Medicine III, Universitätsklinikum Dresden, Technische Universität Dresden, Dresden, Germany.,Center for Healthy Aging, Universitätsklinikum Dresden, Technische Universität Dresden, Dresden, Germany
| | - Martina Rauner
- Department of Medicine III, Universitätsklinikum Dresden, Technische Universität Dresden, Dresden, Germany.,Center for Healthy Aging, Universitätsklinikum Dresden, Technische Universität Dresden, Dresden, Germany
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41
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Dai G, Li Y, Liu J, Zhang C, Chen M, Lu P, Rui Y. Higher BMP Expression in Tendon Stem/Progenitor Cells Contributes to the Increased Heterotopic Ossification in Achilles Tendon With Aging. Front Cell Dev Biol 2020; 8:570605. [PMID: 33102476 PMCID: PMC7546413 DOI: 10.3389/fcell.2020.570605] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 09/04/2020] [Indexed: 12/18/2022] Open
Abstract
Although the mineralization in tendon tissue has been reported in a series of aging and disease models, the underlying mechanisms remain unknown. This study aimed to describe the appearance of heterotopic ossification in rat Achilles tendon and further verify whether this tissue metaplasia is related to the enhanced osteogenic differentiation of tendon stem/progenitor cells (TSPCs) owing to the higher expression of bone morphogenetic proteins (BMP-2/4/7) with aging. The male SD rats, aged 4, 8, and 20 months (M), were used. The analyses of ossification and BMP expression in tendon were tested by radiological view (X-ray and CT), histological staining [hematoxylin and eosin (HE), Alcian blue, and Alizarin red], immunohistochemistry, and Western blot. The osteogenic differentiation potential and BMP expression of TSPCs were examined by Alizarin red S staining and real-time PCR. TSPCs were treated with BMP-2 or noggin, and the osteogenic differentiation potential was also examined. X-ray and CT showed the appearance of heterotopic ossification in tendon, and the volume and density of ossification was increased with aging. Histological staining showed the appearance of calcified region surrounded by chondrocyte-like cells and the increased osteogenesis-related gene and BMP expression in ossified tendon with aging. Moreover, the osteogenic differentiation potential and BMP expression in TSPCs isolated from ossified tendon were increased with aging. Additionally, BMP-2 increased the calcium nodule formation and osteogenesis-related gene expression in TSPCs. The addition of noggin inhibited BMP-induced enhancement of osteogenic differentiation. Thus, these findings suggested that the enhanced osteogenic differentiation of TSPCs contributes to the increased heterotopic ossification in aged tendon, which might be induced by the higher expression of BMPs with aging.
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Affiliation(s)
- Guangchun Dai
- Department of Orthopaedics, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China.,School of Medicine, Southeast University, Nanjing, China.,Orthopaedic Trauma Institute (OTI), Southeast University, Nanjing, China.,Trauma Center, Zhongda Hospital, Southeast University, Nanjing, China
| | - Yingjuan Li
- Department of Geriatrics, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Junyan Liu
- Department of Orthopaedics, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China.,School of Medicine, Southeast University, Nanjing, China.,Orthopaedic Trauma Institute (OTI), Southeast University, Nanjing, China.,Trauma Center, Zhongda Hospital, Southeast University, Nanjing, China
| | - Cheng Zhang
- Department of Orthopaedics, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China.,School of Medicine, Southeast University, Nanjing, China.,Orthopaedic Trauma Institute (OTI), Southeast University, Nanjing, China.,Trauma Center, Zhongda Hospital, Southeast University, Nanjing, China
| | - Minhao Chen
- Department of Orthopaedics, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China.,School of Medicine, Southeast University, Nanjing, China.,Orthopaedic Trauma Institute (OTI), Southeast University, Nanjing, China.,Trauma Center, Zhongda Hospital, Southeast University, Nanjing, China
| | - Panpan Lu
- Department of Orthopaedics, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China.,School of Medicine, Southeast University, Nanjing, China.,Orthopaedic Trauma Institute (OTI), Southeast University, Nanjing, China.,Trauma Center, Zhongda Hospital, Southeast University, Nanjing, China
| | - Yunfeng Rui
- Department of Orthopaedics, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China.,Orthopaedic Trauma Institute (OTI), Southeast University, Nanjing, China.,Trauma Center, Zhongda Hospital, Southeast University, Nanjing, China.,China Orthopedic Regenerative Medicine Group, Hangzhou, China
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Ledesma-Colunga MG, Baschant U, Fiedler IAK, Busse B, Hofbauer LC, Muckenthaler MU, Altamura S, Rauner M. Disruption of the hepcidin/ferroportin regulatory circuitry causes low axial bone mass in mice. Bone 2020; 137:115400. [PMID: 32380257 DOI: 10.1016/j.bone.2020.115400] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 04/24/2020] [Accepted: 04/27/2020] [Indexed: 12/11/2022]
Abstract
Ferroportin (FPN) is the only known iron exporter. Mutations conferring resistance of FPN to hepcidin-mediated degradation cause the iron overload disorder hereditary hemochromatosis type 4. While iron overload is associated with low bone mass, the mechanisms involved are not completely understood. Here, we aimed to investigate whether the disruption in the hepcidin/FPN axis in FpnC326S mice and subsequent systemic iron accumulation impacts on bone tissue to a similar extent as in Hfe-/- mice, which are hallmarked by a milder iron overload phenotype. Hfe-/- and FpnC326S mice show increased plasma iron levels and liver iron content, whereas iron overload was more pronounced in FpnC326S compared to Hfe-/- mice. Bone volume fraction and trabecular thickness at the femur were not different between 10 and 14-week-old male wild-type (WT), Hfe-/- and FpnC326S mice. By contrast, both Hfe-/- and FpnC326S mice exhibited a lower bone volume fraction [Hfe-/-, 24%; FpnC326S, 33%; p < 0.05] and trabecular thickness [Hfe-/-, 10%; FpnC326S, 15%; p < 0.05] in the fourth lumbar vertebra compared to WT mice. Analysis of the bone formation rate at the tibia showed no difference in both genotypes, but it was reduced in the vertebral bone of FpnC326S [36%, p < 0.05] compared to WT mice. Serum levels of the bone formation marker, P1NP, were significantly reduced in both, Hfe-/- and FpnC326S compared with WT mice [Hfe-/-, 35%; FpnC326S, 40%; p < 0.05]. Also, the intrinsic differentiation capacity of FpnC326S osteoblasts was impaired. Osteoclast parameters were not grossly affected. Interestingly, the liver iron content and plasma iron levels negatively correlated with the bone formation rate and serum levels of P1NP. Thus, disruption of the hepcidin/ferroportin regulatory axis in FpnC326S mice results in axial bone loss due to suppressed bone formation.
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Affiliation(s)
- Maria G Ledesma-Colunga
- Department of Medicine III, Technische Universität Dresden, Dresden, Germany; Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Ulrike Baschant
- Department of Medicine III, Technische Universität Dresden, Dresden, Germany; Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Imke A K Fiedler
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Björn Busse
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Lorenz C Hofbauer
- Department of Medicine III, Technische Universität Dresden, Dresden, Germany; Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Martina U Muckenthaler
- Department of Pediatric Hematology, Oncology and Immunology, University of Heidelberg, Heidelberg, Germany
| | - Sandro Altamura
- Department of Pediatric Hematology, Oncology and Immunology, University of Heidelberg, Heidelberg, Germany
| | - Martina Rauner
- Department of Medicine III, Technische Universität Dresden, Dresden, Germany; Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany.
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43
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Iron Status in Elderly Women Impacts Myostatin, Adiponectin and Osteocalcin Levels Induced by Nordic Walking Training. Nutrients 2020; 12:nu12041129. [PMID: 32316589 PMCID: PMC7231223 DOI: 10.3390/nu12041129] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 04/09/2020] [Accepted: 04/15/2020] [Indexed: 01/26/2023] Open
Abstract
Impaired iron metabolism is associated with increased risk of many morbidities. Exercise was shown to have a beneficial role; however, the mechanism is not well understood. The purpose of this study was to assess the relationship between exerkines and iron metabolism in elderly women before and after 12 weeks of Nordic Walking (NW) training. Exerkines like myostatin, adiponectin, and osteocalcin have been shown to have several positive effects on metabolism. Thirty-six post-menopausal women (66 ± 5 years old, mean ± SD) were randomly assigned to a NW intervention group (n = 18; body mass, 68.8 ± 11.37 kg; fat, 23.43 ± 7.5 kg; free fat mass, 45.37 ± 5.92 kg) or a control group (n = 18; body mass, 68.34 ± 11.81 kg; fat, 23.61 ± 10.03 kg; free fat mass, 44.73 ± 3.9 kg). The training was performed three times a week for 12 weeks, with the intensity adjusted to 70% of the individual maximum ability. Before and one day after the 12-weeks intervention, performance indices were assessed using a senior fitness test. Blood samples (5 mL) were obtained from the participants between 7 and 8 AM, following an overnight fast, at baseline and one day immediately after the 12-week training program. A significant and large time × group interaction was observed for iron (NW: 98.6 ± 26.68 to 76.1 ± 15.31; CON: 100.6 ± 25.37 to 99.1 ± 27.2; p = 0.01; ηp2 = 0.21), myostatin (NW: 4.42 ± 1.97 to 3.83 ± 1.52; CON: 4.11 ± 0.95 to 4.84 ± 1.19; p = 0.00; ηp2 = 0.62), adiponectin (NW: 12.0 ± 9.46 to 14.6 ± 10.64; CON: 12.8 ± 8.99 to 11.9 ± 8.53; p = 0.00; ηp2 = 0.58), and osteocalcin (NW: 38.9 ± 26.04 to 41.6 ± 25.09; CON: 37.1 ± 33.2 to 37.2 ± 32.29; p = 0.03; ηp2 = 0.13). Furthermore, we have observed the correlations: basal ferritin levels were inversely correlated with changes in myostatin (r = −0.51, p = 0.05), change in adiponectin, and change in serum iron (r = −0.45, p = 0.05), basal iron, and osteocalcin after training (r = -0.55, p = 0.04). These findings indicate that iron modulates NW training-induced changes in exerkine levels.
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44
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Zhang Q, Zhou D, Wang H, Tan J. Heterotopic ossification of tendon and ligament. J Cell Mol Med 2020; 24:5428-5437. [PMID: 32293797 PMCID: PMC7214162 DOI: 10.1111/jcmm.15240] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 03/14/2020] [Accepted: 03/17/2020] [Indexed: 02/06/2023] Open
Abstract
Much of the similarities of the tissue characteristics, pathologies and mechanisms of heterotopic ossification (HO) formation are shared between HO of tendon and ligament (HOTL). Unmet need and no effective treatment has been developed for HOTL, primarily attributable to poor understanding of cellular and molecular mechanisms. HOTL forms via endochondral ossification, a common process of most kinds of HO. HOTL is a dynamic pathologic process that includes trauma/injury, inflammation, mesenchymal stromal cell (MSC) recruitment, chondrogenic differentiation and, finally, ossification. A variety of signal pathways involve HOTL with multiple roles in different stages of HO formation, and here in this review, we summarize the progress and provide an up‐to‐date understanding of HOTL.
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Affiliation(s)
- Qiang Zhang
- Department of Orthopaedic Surgery, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Department of Orthopedics, Changzhou No. 2 People's Hospital, Changzhou, China.,Division of Geriatric Medicine & Gerontology, Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA.,Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
| | - Dong Zhou
- Department of Orthopedics, Changzhou No. 2 People's Hospital, Changzhou, China
| | - Haitao Wang
- Division of Geriatric Medicine & Gerontology, Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA.,Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
| | - Jun Tan
- Department of Orthopaedic Surgery, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Department of Orthopedics, Pinghu Second People's Hospital, Pinghu, China
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45
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Arezes J, Foy N, McHugh K, Quinkert D, Benard S, Sawant A, Frost JN, Armitage AE, Pasricha SR, Lim PJ, Tam MS, Lavallie E, Pittman DD, Cunningham O, Lambert M, Murphy JE, Draper SJ, Jasuja R, Drakesmith H. Antibodies against the erythroferrone N-terminal domain prevent hepcidin suppression and ameliorate murine thalassemia. Blood 2020; 135:547-557. [PMID: 31899794 PMCID: PMC7046598 DOI: 10.1182/blood.2019003140] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 12/12/2019] [Indexed: 01/19/2023] Open
Abstract
Erythroferrone (ERFE) is produced by erythroblasts in response to erythropoietin (EPO) and acts in the liver to prevent hepcidin stimulation by BMP6. Hepcidin suppression allows for the mobilization of iron to the bone marrow for the production of red blood cells. Aberrantly high circulating ERFE in conditions of stress erythropoiesis, such as in patients with β-thalassemia, promotes the tissue iron accumulation that substantially contributes to morbidity in these patients. Here we developed antibodies against ERFE to prevent hepcidin suppression and to correct the iron loading phenotype in a mouse model of β-thalassemia [Hbb(th3/+) mice] and used these antibodies as tools to further characterize ERFE's mechanism of action. We show that ERFE binds to BMP6 with nanomolar affinity and binds BMP2 and BMP4 with somewhat weaker affinities. We found that BMP6 binds the N-terminal domain of ERFE, and a polypeptide derived from the N terminus of ERFE was sufficient to cause hepcidin suppression in Huh7 hepatoma cells and in wild-type mice. Anti-ERFE antibodies targeting the N-terminal domain prevented hepcidin suppression in ERFE-treated Huh7 cells and in EPO-treated mice. Finally, we observed a decrease in splenomegaly and serum and liver iron in anti-ERFE-treated Hbb(th3/+) mice, accompanied by an increase in red blood cells and hemoglobin and a decrease in reticulocyte counts. In summary, we show that ERFE binds BMP6 directly and with high affinity, and that antibodies targeting the N-terminal domain of ERFE that prevent ERFE-BMP6 interactions constitute a potential therapeutic tool for iron loading anemias.
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Affiliation(s)
- João Arezes
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, United Kingdom
| | - Niall Foy
- BioMedicine Design, Pfizer Biotherapeutics R&D, Dublin, Ireland
| | - Kirsty McHugh
- Jenner Institute, University of Oxford, Oxford, United Kingdom
| | - Doris Quinkert
- Jenner Institute, University of Oxford, Oxford, United Kingdom
| | - Susan Benard
- BioMedicine Design, Pfizer Biotherapeutics R&D, Cambridge, MA
| | - Anagha Sawant
- Rare Disease Research Unit, Pfizer Inc., Cambridge, MA
| | - Joe N Frost
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, United Kingdom
| | - Andrew E Armitage
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, United Kingdom
| | - Sant-Rayn Pasricha
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, United Kingdom
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia
- Department of Medical Biology, The University of Melbourne, Melbourne, VIC, Australia; and
| | - Pei Jin Lim
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, United Kingdom
| | - May S Tam
- Rare Disease Research Unit, Pfizer Inc., Cambridge, MA
| | | | | | - Orla Cunningham
- BioMedicine Design, Pfizer Biotherapeutics R&D, Dublin, Ireland
| | - Matthew Lambert
- BioMedicine Design, Pfizer Biotherapeutics R&D, Dublin, Ireland
| | - John E Murphy
- Rare Disease Research Unit, Pfizer Inc., Cambridge, MA
| | - Simon J Draper
- Jenner Institute, University of Oxford, Oxford, United Kingdom
| | - Reema Jasuja
- Rare Disease Research Unit, Pfizer Inc., Cambridge, MA
| | - Hal Drakesmith
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, United Kingdom
- Haematology Theme NIHR Oxford Biomedical Research Centre, Oxford, United Kingdom
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46
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Low iron promotes megakaryocytic commitment of megakaryocytic-erythroid progenitors in humans and mice. Blood 2020; 134:1547-1557. [PMID: 31439541 DOI: 10.1182/blood.2019002039] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 08/09/2019] [Indexed: 12/13/2022] Open
Abstract
The mechanisms underlying thrombocytosis in patients with iron deficiency anemia remain unknown. Here, we present findings that support the hypothesis that low iron biases the commitment of megakaryocytic (Mk)-erythroid progenitors (MEPs) toward the Mk lineage in both human and mouse. In MEPs of transmembrane serine protease 6 knockout (Tmprss6-/-) mice, which exhibit iron deficiency anemia and thrombocytosis, we observed a Mk bias, decreased labile iron, and decreased proliferation relative to wild-type (WT) MEPs. Bone marrow transplantation assays suggest that systemic iron deficiency, rather than a local role for Tmprss6-/- in hematopoietic cells, contributes to the MEP lineage commitment bias observed in Tmprss6-/- mice. Nontransgenic mice with acquired iron deficiency anemia also show thrombocytosis and Mk-biased MEPs. Gene expression analysis reveals that messenger RNAs encoding genes involved in metabolic, vascular endothelial growth factor, and extracellular signal-regulated kinase (ERK) pathways are enriched in Tmprss6-/- vs WT MEPs. Corroborating our findings from the murine models of iron deficiency anemia, primary human MEPs exhibit decreased proliferation and Mk-biased commitment after knockdown of transferrin receptor 2, a putative iron sensor. Signal transduction analyses reveal that both human and murine MEP have lower levels of phospho-ERK1/2 in iron-deficient conditions compared with controls. These data are consistent with a model in which low iron in the marrow environment affects MEP metabolism, attenuates ERK signaling, slows proliferation, and biases MEPs toward Mk lineage commitment.
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47
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Wortham AM, Goldman DC, Chen J, Fleming WH, Zhang AS, Enns CA. Extrahepatic deficiency of transferrin receptor 2 is associated with increased erythropoiesis independent of iron overload. J Biol Chem 2020; 295:3906-3917. [PMID: 32054685 DOI: 10.1074/jbc.ra119.010535] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 02/11/2020] [Indexed: 12/19/2022] Open
Abstract
Transferrin receptor 2 (TFR2) is a transmembrane protein expressed mainly in hepatocytes and in developing erythroid cells and is an important focal point in systemic iron regulation. Loss of TFR2 function results in a rare form of the iron-overload disease hereditary hemochromatosis. Although TFR2 in the liver has been shown to be important for regulating iron homeostasis in the body, TFR2's function in erythroid progenitors remains controversial. In this report, we analyzed TFR2-deficient mice in the presence or absence of iron overload to distinguish between the effects caused by a high iron load and those caused by loss of TFR2 function. Analysis of bone marrow from TFR2-deficient mice revealed a reduction in the early burst-forming unit-erythroid and an expansion of late-stage erythroblasts that was independent of iron overload. Spleens of TFR2-deficient mice displayed an increase in colony-forming unit-erythroid progenitors and in all erythroblast populations regardless of iron overload. This expansion of the erythroid compartment coincided with increased erythroferrone (ERFE) expression and serum erythropoietin (EPO) levels. Rescue of hepatic TFR2 expression normalized hepcidin expression and the total cell count of the bone marrow and spleen, but it had no effect on erythroid progenitor frequency. On the basis of these results, we propose a model of TFR2's function in murine erythropoiesis, indicating that deficiency in this receptor is associated with increased erythroid development and expression of EPO and ERFE in extrahepatic tissues independent of TFR's role in the liver.
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Affiliation(s)
- Aaron M Wortham
- Department of Cell, Developmental and Cancer Biology, Oregon Health and Science University, Portland, Oregon 97239
| | - Devorah C Goldman
- Department of Pediatrics, Oregon Health and Science University, Portland, Oregon 97239
| | - Juxing Chen
- Department of Cell, Developmental and Cancer Biology, Oregon Health and Science University, Portland, Oregon 97239
| | - William H Fleming
- Department of Pediatrics, Oregon Health and Science University, Portland, Oregon 97239
| | - An-Sheng Zhang
- Department of Cell, Developmental and Cancer Biology, Oregon Health and Science University, Portland, Oregon 97239
| | - Caroline A Enns
- Department of Cell, Developmental and Cancer Biology, Oregon Health and Science University, Portland, Oregon 97239
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48
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Camaschella C, Nai A, Silvestri L. Iron metabolism and iron disorders revisited in the hepcidin era. Haematologica 2020; 105:260-272. [PMID: 31949017 PMCID: PMC7012465 DOI: 10.3324/haematol.2019.232124] [Citation(s) in RCA: 324] [Impact Index Per Article: 81.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 12/18/2019] [Indexed: 02/06/2023] Open
Abstract
Iron is biologically essential, but also potentially toxic; as such it is tightly controlled at cell and systemic levels to prevent both deficiency and overload. Iron regulatory proteins post-transcriptionally control genes encoding proteins that modulate iron uptake, recycling and storage and are themselves regulated by iron. The master regulator of systemic iron homeostasis is the liver peptide hepcidin, which controls serum iron through degradation of ferroportin in iron-absorptive enterocytes and iron-recycling macrophages. This review emphasizes the most recent findings in iron biology, deregulation of the hepcidin-ferroportin axis in iron disorders and how research results have an impact on clinical disorders. Insufficient hepcidin production is central to iron overload while hepcidin excess leads to iron restriction. Mutations of hemochro-matosis genes result in iron excess by downregulating the liver BMP-SMAD signaling pathway or by causing hepcidin-resistance. In iron-loading anemias, such as β-thalassemia, enhanced albeit ineffective ery-thropoiesis releases erythroferrone, which sequesters BMP receptor ligands, thereby inhibiting hepcidin. In iron-refractory, iron-deficiency ane-mia mutations of the hepcidin inhibitor TMPRSS6 upregulate the BMP-SMAD pathway. Interleukin-6 in acute and chronic inflammation increases hepcidin levels, causing iron-restricted erythropoiesis and ane-mia of inflammation in the presence of iron-replete macrophages. Our improved understanding of iron homeostasis and its regulation is having an impact on the established schedules of oral iron treatment and the choice of oral versus intravenous iron in the management of iron deficiency. Moreover it is leading to the development of targeted therapies for iron overload and inflammation, mainly centered on the manipulation of the hepcidin-ferroportin axis.
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Affiliation(s)
- Clara Camaschella
- Regulation of Iron Metabolism Unit, Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan
| | - Antonella Nai
- Regulation of Iron Metabolism Unit, Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan.,Vita Salute San Raffaele University, Milan, Italy
| | - Laura Silvestri
- Regulation of Iron Metabolism Unit, Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan.,Vita Salute San Raffaele University, Milan, Italy
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49
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Rauner M, Seefried L, Shore E. Genetics and future therapy prospects of fibrodysplasia ossificans progressiva. MED GENET-BERLIN 2020. [DOI: 10.1007/s11825-019-00279-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Abstract
Fibrodysplasia ossificans progressiva (FOP) is a rare autosomal dominant genetic condition characterised by progressive extra-skeletal bone formation in connective tissues. Over time, heterotopic ossification entombs patients within a second skeleton, drastically impairing their mobility and autonomy. Mutations in the ACVR1 gene have been identified as the cause of FOP. The single nucleotide missense mutation in ACVR1, c.617G > A, causes a single amino acid substitution, p.R206H, and is found in >90% of all patients. Heterotopic bone formation in FOP mimics embryonic skeletal endochondral ossification, with cartilage forming after fibroproliferative tissue condensation as an intermediate stage prior to osteogenesis and tissue ossification. In contrast to normal embryonic endochondral ossification, heterotopic ossification in FOP involves an inflammatory phase that precedes cartilage and bone formation. New insights into the mechanisms of action of heterotopic bone formation in FOP have led to the discovery of new potential treatment targets including inhibitors of BMP signalling, activin A inhibitors, and mTOR inhibitors. This review summarises the current knowledge on mutations causing FOP, as well as the molecular basis of heterotopic ossification and the therapeutic options that result from these discoveries.
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Affiliation(s)
- Martina Rauner
- 1 grid.4488.0 0000 0001 2111 7257 Department of Medicine III & Center for Healthy Aging Technische Universität Dresden 01307 Dresden Germany
| | - Lothar Seefried
- 2 grid.8379.5 0000 0001 1958 8658 Department of Orthopedics University of Würzburg Würzburg Germany
| | - Eileen Shore
- 3 grid.25879.31 0000 0004 1936 8972 Departments of Orthopedics and Genetics, Perelman School of Medicine University of Pennsylvania Philadelphia USA
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50
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Abstract
The 11 existing FDA-approved osteoporosis drug treatments include hormone replacement therapy, 2 SERMs (raloxifene and bazedoxifene), 5 inhibitors of bone-resorbing osteoclasts (4 bisphosphonates and anti-RANKL denosumab), 2 parathyroid hormone analogues (teriparatide and abaloparatide), and 1 WNT signaling enhancer (romosozumab). These therapies are effective and provide multiple options for patients and physicians. As the genomic revolution continues, potential novel targets for future drug development are identified. This review takes a wide perspective to describe potentially rewarding topics to explore, including knowledge of genes and pathways involved in bone cell metabolism, the utility of animal models, targeting drugs to bone, and ongoing advances in drug design and delivery.
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