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Mizoguchi T. In vivo dynamics of hard tissue-forming cell origins: Insights from Cre/loxP-based cell lineage tracing studies. JAPANESE DENTAL SCIENCE REVIEW 2024; 60:109-119. [PMID: 38406212 PMCID: PMC10885318 DOI: 10.1016/j.jdsr.2024.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 01/25/2024] [Accepted: 01/30/2024] [Indexed: 02/27/2024] Open
Abstract
Bone tissue provides structural support for our bodies, with the inner bone marrow (BM) acting as a hematopoietic organ. Within the BM tissue, two types of stem cells play crucial roles: mesenchymal stem cells (MSCs) (or skeletal stem cells) and hematopoietic stem cells (HSCs). These stem cells are intricately connected, where BM-MSCs give rise to bone-forming osteoblasts and serve as essential components in the BM microenvironment for sustaining HSCs. Despite the mid-20th century proposal of BM-MSCs, their in vivo identification remained elusive owing to a lack of tools for analyzing stemness, specifically self-renewal and multipotency. To address this challenge, Cre/loxP-based cell lineage tracing analyses are being employed. This technology facilitated the in vivo labeling of specific cells, enabling the tracking of their lineage, determining their stemness, and providing a deeper understanding of the in vivo dynamics governing stem cell populations responsible for maintaining hard tissues. This review delves into cell lineage tracing studies conducted using commonly employed genetically modified mice expressing Cre under the influence of LepR, Gli1, and Axin2 genes. These studies focus on research fields spanning long bones and oral/maxillofacial hard tissues, offering insights into the in vivo dynamics of stem cell populations crucial for hard tissue homeostasis.
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Castoldi NM, Pickering E, Sansalone V, Cooper D, Pivonka P. Bone turnover and mineralisation kinetics control trabecular BMDD and apparent bone density: insights from a discrete statistical bone remodelling model. Biomech Model Mechanobiol 2024; 23:893-909. [PMID: 38280951 PMCID: PMC11101591 DOI: 10.1007/s10237-023-01812-4] [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: 08/22/2023] [Accepted: 12/22/2023] [Indexed: 01/29/2024]
Abstract
The mechanical quality of trabecular bone is influenced by its mineral content and spatial distribution, which is controlled by bone remodelling and mineralisation. Mineralisation kinetics occur in two phases: a fast primary mineralisation and a secondary mineralisation that can last from several months to years. Variations in bone turnover and mineralisation kinetics can be observed in the bone mineral density distribution (BMDD). Here, we propose a statistical spatio-temporal bone remodelling model to study the effects of bone turnover (associated with the activation frequency Ac . f ) and mineralisation kinetics (associated with secondary mineralisation T sec ) on BMDD. In this model, individual basic multicellular units (BMUs) are activated discretely on trabecular surfaces that undergo typical bone remodelling periods. Our results highlight that trabecular BMDD is strongly regulated by Ac . f and T sec in a coupled way. Ca wt% increases with lower Ac . f and short T sec . For example, aAc . f = 4 BMU/year/mm3 and T sec = 8 years result in a mean Ca wt% of 25, which is in accordance with Ca wt% values reported in quantitative backscattered electron imaging (qBEI) experiments. However, for lower Ac . f and shorter T sec (from 0.5 to 4 years) one obtains a high Ca wt% and a very narrow skew BMDD to the right. This close link between Ac . f and T sec highlights the importance of considering both characteristics to draw meaningful conclusion about bone quality. Overall, this model represents a new approach to modelling healthy and diseased bone and can aid in developing deeper insights into disease states like osteoporosis.
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Affiliation(s)
- Natalia M Castoldi
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, Australia.
- UMR 8208, MSME, Univ Paris Est Creteil, Univ Gustave Eiffel, CNRS, Créteil, France.
| | - Edmund Pickering
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, Australia
- Centre for Biomedical Technologies, Queensland University of Technology, Brisbane, Australia
| | - Vittorio Sansalone
- UMR 8208, MSME, Univ Paris Est Creteil, Univ Gustave Eiffel, CNRS, Créteil, France
| | - David Cooper
- Department of Anatomy Physiology and Pharmacology, College of Medicine, University of Saskatchewan, Saskatoon, Canada
| | - Peter Pivonka
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, Australia.
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3
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Reddien PW. The purpose and ubiquity of turnover. Cell 2024; 187:2657-2681. [PMID: 38788689 DOI: 10.1016/j.cell.2024.04.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 03/19/2024] [Accepted: 04/24/2024] [Indexed: 05/26/2024]
Abstract
Turnover-constant component production and destruction-is ubiquitous in biology. Turnover occurs across organisms and scales, including for RNAs, proteins, membranes, macromolecular structures, organelles, cells, hair, feathers, nails, antlers, and teeth. For many systems, turnover might seem wasteful when degraded components are often fully functional. Some components turn over with shockingly high rates and others do not turn over at all, further making this process enigmatic. However, turnover can address fundamental problems by yielding powerful properties, including regeneration, rapid repair onset, clearance of unpredictable damage and errors, maintenance of low constitutive levels of disrepair, prevention of stable hazards, and transitions. I argue that trade-offs between turnover benefits and metabolic costs, combined with constraints on turnover, determine its presence and rates across distinct contexts. I suggest that the limits of turnover help explain aging and that turnover properties and the basis for its levels underlie this fundamental component of life.
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Affiliation(s)
- Peter W Reddien
- Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA; Department of Biology, MIT, Cambridge, MA 02139, USA; Howard Hughes Medical Institute, MIT, Cambridge, MA 02139, USA.
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4
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Sánchez JF, Ramtani S, Boucetta A, Velasco MA, Vaca-González JJ, Duque-Daza CA, Garzón-Alvarado DA. Tumor growth for remodeling process: A 2D approach. J Theor Biol 2024; 585:111781. [PMID: 38432504 DOI: 10.1016/j.jtbi.2024.111781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 02/07/2024] [Accepted: 02/27/2024] [Indexed: 03/05/2024]
Abstract
This paper aims to present a comprehensive framework for coupling tumor-bone remodeling processes in a 2-dimensional geometry. This is achieved by introducing a bio-inspired damage that represents the growing tumor, which subsequently affects the main populations involved in the remodeling process, namely, osteoclasts, osteoblasts, and bone tissue. The model is constructed using a set of differential equations based on the Komarova's and Ayati's models, modified to incorporate the bio-inspired damage that may result in tumor mass formation. Three distinct models were developed. The first two models are based on the Komarova's governing equations, with one demonstrating an osteolytic behavior and the second one an osteoblastic model. The third model is a variation of Ayati's model, where the bio-inspired damage is induced through the paracrine and autocrine parameters, exhibiting an osteolytic behavior. The obtained results are consistent with existing literature, leading us to believe that our in-silico experiments will serve as a cornerstone for paving the way towards targeted interventions and personalized treatment strategies, ultimately improving the quality of life for those affected by these conditions.
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Affiliation(s)
| | - Salah Ramtani
- Laboratoire CSPBAT, equipe LBPS, CNRS (UMR 7244), Universit e Sorbonne Paris Nord, France.
| | - Abdelkader Boucetta
- Laboratoire CSPBAT, equipe LBPS, CNRS (UMR 7244), Universit e Sorbonne Paris Nord, France
| | | | - Juan Jairo Vaca-González
- Escuela de Pregrado - Direccion Académica, Universidad Nacional de Colombia, Sede de La Paz, Colombia.
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5
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Liu L, Luo P, Wen P, Xu P. Effects of selenium and iodine on Kashin-Beck disease: an updated review. Front Nutr 2024; 11:1402559. [PMID: 38757132 PMCID: PMC11096467 DOI: 10.3389/fnut.2024.1402559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Accepted: 04/22/2024] [Indexed: 05/18/2024] Open
Abstract
Kashin-Beck disease (KBD) is an endochondral osteogenesis disorder characterised by epiphysis damage and secondary deformable arthropathy induced by multiple external factors, among which selenium (Se) and iodine deficiency are important influencing factors. Iodine deficiency is usually accompanied by a low Se content in the soil in the KBD areas of China. Se can reverse oxidative damage to chondrocytes. In addition, Se is related to the bone conversion rate and bone mineral density. Low Se will hinder growth and change bone metabolism, resulting in a decrease in the bone conversion rate and bone mineral density. Thyroid hormone imbalance caused by thyroid dysfunction caused by iodine deficiency can damage bone homeostasis. Compared with Se deficiency alone, Se combined with iodine deficiency can reduce the activity of glutathione peroxidase more effectively, which increases the vulnerability of chondrocytes and other target cells to oxidative stress, resulting in chondrocyte death. Clinical studies have shown that supplementation with Se and iodine is helpful for the prevention and treatment of KBD.
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Affiliation(s)
| | | | | | - Peng Xu
- Department of Joint Surgery, HongHui Hospital, Xi’an Jiaotong University, Xi’an, China
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6
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Wang H, Yuan T, Wang Y, Liu C, Li D, Li Z, Sun S. Osteoclasts and osteoarthritis: Novel intervention targets and therapeutic potentials during aging. Aging Cell 2024; 23:e14092. [PMID: 38287696 PMCID: PMC11019147 DOI: 10.1111/acel.14092] [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: 10/17/2023] [Revised: 12/28/2023] [Accepted: 01/02/2024] [Indexed: 01/31/2024] Open
Abstract
Osteoarthritis (OA), a chronic degenerative joint disease, is highly prevalent among the aging population, and often leads to joint pain, disability, and a diminished quality of life. Although considerable research has been conducted, the precise molecular mechanisms propelling OA pathogenesis continue to be elusive, thereby impeding the development of effective therapeutics. Notably, recent studies have revealed subchondral bone lesions precede cartilage degeneration in the early stage of OA. This development is marked by escalated osteoclast-mediated bone resorption, subsequent imbalances in bone metabolism, accelerated bone turnover, and a decrease in bone volume, thereby contributing significantly to the pathological changes. While the role of aging hallmarks in OA has been extensively elucidated from the perspective of chondrocytes, their connection with osteoclasts is not yet fully understood. There is compelling evidence to suggest that age-related abnormalities such as epigenetic alterations, proteostasis network disruption, cellular senescence, and mitochondrial dysfunction, can stimulate osteoclast activity. This review intends to systematically discuss how aging hallmarks contribute to OA pathogenesis, placing particular emphasis on the age-induced shifts in osteoclast activity. It also aims to stimulate future studies probing into the pathological mechanisms and therapeutic approaches targeting osteoclasts in OA during aging.
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Affiliation(s)
- Haojue Wang
- Department of Joint Surgery, Shandong Provincial Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Tao Yuan
- Department of Joint Surgery, Shandong Provincial Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Yi Wang
- Department of Joint SurgeryShandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanShandongChina
- Orthopaedic Research Laboratory, Medical Science and Technology Innovation CenterShandong First Medical University and Shandong Academy of Medical SciencesJinanShandongChina
| | - Changxing Liu
- Department of Joint Surgery, Shandong Provincial Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Dengju Li
- Department of Joint SurgeryShandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanShandongChina
- Orthopaedic Research Laboratory, Medical Science and Technology Innovation CenterShandong First Medical University and Shandong Academy of Medical SciencesJinanShandongChina
| | - Ziqing Li
- Department of Joint SurgeryShandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanShandongChina
- Orthopaedic Research Laboratory, Medical Science and Technology Innovation CenterShandong First Medical University and Shandong Academy of Medical SciencesJinanShandongChina
| | - Shui Sun
- Department of Joint Surgery, Shandong Provincial Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
- Department of Joint SurgeryShandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanShandongChina
- Orthopaedic Research Laboratory, Medical Science and Technology Innovation CenterShandong First Medical University and Shandong Academy of Medical SciencesJinanShandongChina
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7
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Liao P, Chen L, Zhou H, Mei J, Chen Z, Wang B, Feng JQ, Li G, Tong S, Zhou J, Zhu S, Qian Y, Zong Y, Zou W, Li H, Zhang W, Yao M, Ma Y, Ding P, Pang Y, Gao C, Mei J, Zhang S, Zhang C, Liu D, Zheng M, Gao J. Osteocyte mitochondria regulate angiogenesis of transcortical vessels. Nat Commun 2024; 15:2529. [PMID: 38514612 PMCID: PMC10957947 DOI: 10.1038/s41467-024-46095-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 02/13/2024] [Indexed: 03/23/2024] Open
Abstract
Transcortical vessels (TCVs) provide effective communication between bone marrow vascular system and external circulation. Although osteocytes are in close contact with them, it is not clear whether osteocytes regulate the homeostasis of TCVs. Here, we show that osteocytes maintain the normal network of TCVs by transferring mitochondria to the endothelial cells of TCV. Partial ablation of osteocytes causes TCV regression. Inhibition of mitochondrial transfer by conditional knockout of Rhot1 in osteocytes also leads to regression of the TCV network. By contrast, acquisition of osteocyte mitochondria by endothelial cells efficiently restores endothelial dysfunction. Administration of osteocyte mitochondria resultes in acceleration of the angiogenesis and healing of the cortical bone defect. Our results provide new insights into osteocyte-TCV interactions and inspire the potential application of mitochondrial therapy for bone-related diseases.
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Affiliation(s)
- Peng Liao
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Long Chen
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, CAS Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Hao Zhou
- Department of Orthopedics, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Jiong Mei
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ziming Chen
- Centre for Orthopaedic Research, Medical School, The University of Western Australia, Nedlands, Western Australia, Australia
- Perron Institute for Neurological and Translational Science, Nedlands, Western Australia, Australia
| | - Bingqi Wang
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jerry Q Feng
- Shanxi Medical University School and Hospital of Stomatology, Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan, China
| | - Guangyi Li
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Sihan Tong
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jian Zhou
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Siyuan Zhu
- Department of General Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yu Qian
- Department of Orthopedics, The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, China
| | - Yao Zong
- Centre for Orthopaedic Research, Medical School, The University of Western Australia, Nedlands, Western Australia, Australia
- Perron Institute for Neurological and Translational Science, Nedlands, Western Australia, Australia
| | - Weiguo Zou
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, CAS Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Hao Li
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wenkan Zhang
- Department of Orthopedics, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Meng Yao
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yiyang Ma
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Peng Ding
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yidan Pang
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chuan Gao
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jialun Mei
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Senyao Zhang
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Changqing Zhang
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
| | - Delin Liu
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
| | - Minghao Zheng
- Centre for Orthopaedic Research, Medical School, The University of Western Australia, Nedlands, Western Australia, Australia.
- Perron Institute for Neurological and Translational Science, Nedlands, Western Australia, Australia.
| | - Junjie Gao
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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Chandrabalan S, Dang L, Hansen U, Timmen M, Wehmeyer C, Stange R, Beißbarth T, Binder C, Bleckmann A, Menck K. A novel method to efficiently differentiate human osteoclasts from blood-derived monocytes. Biol Proced Online 2024; 26:7. [PMID: 38504200 PMCID: PMC10949786 DOI: 10.1186/s12575-024-00233-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 03/09/2024] [Indexed: 03/21/2024] Open
Abstract
BACKGROUND Osteoclasts are the tissue-specific macrophage population of the bone and unique in their bone-resorbing activity. Hence, they are fundamental for bone physiology in health and disease. However, efficient protocols for the isolation and study of primary human osteoclasts are scarce. In this study, we aimed to establish a protocol, which enables the efficient differentiation of functional human osteoclasts from monocytes. RESULTS Human monocytes were isolated through a double-density gradient from donor blood. Compared to standard differentiation schemes in polystyrene cell culture dishes, the yield of multinuclear osteoclasts was significantly increased upon initial differentiation of monocytes to macrophages in fluorinated ethylene propylene (FEP) Teflon bags. This initial differentiation phase was then followed by the development of terminal osteoclasts by addition of Receptor Activator of NF-κB Ligand (RANKL). High concentrations of RANKL and Macrophage colony-stimulating factor (M-CSF) as well as an intermediate cell density further supported efficient cell differentiation. The generated cells were highly positive for CD45, CD14 as well as the osteoclast markers CD51/ITGAV and Cathepsin K/CTSK, thus identifying them as osteoclasts. The bone resorption of the osteoclasts was significantly increased when the cells were differentiated from macrophages derived from Teflon bags compared to macrophages derived from conventional cell culture plates. CONCLUSION Our study has established a novel protocol for the isolation of primary human osteoclasts that improves osteoclastogenesis in comparison to the conventionally used cultivation approach.
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Affiliation(s)
- Suganja Chandrabalan
- Department of Medicine A, Hematology, Oncology, and Pneumology, University of Muenster, Muenster, Germany
- West German Cancer Center, University Hospital Muenster, Muenster, Germany
| | - Linh Dang
- Department of Medical Bioinformatics, University Medical Center Goettingen, Goettingen, Germany
| | - Uwe Hansen
- Institute of Musculoskeletal Medicine (IMM), University of Muenster, Muenster, Germany
| | - Melanie Timmen
- Institute of Musculoskeletal Medicine (IMM), University of Muenster, Muenster, Germany
| | - Corinna Wehmeyer
- Institute of Musculoskeletal Medicine (IMM), University of Muenster, Muenster, Germany
| | - Richard Stange
- Institute of Musculoskeletal Medicine (IMM), University of Muenster, Muenster, Germany
| | - Tim Beißbarth
- Department of Medical Bioinformatics, University Medical Center Goettingen, Goettingen, Germany
| | - Claudia Binder
- Department of Hematology/Medical Oncology, University Medical Center Goettingen, Goettingen, Germany
| | - Annalen Bleckmann
- Department of Medicine A, Hematology, Oncology, and Pneumology, University of Muenster, Muenster, Germany
- West German Cancer Center, University Hospital Muenster, Muenster, Germany
| | - Kerstin Menck
- Department of Medicine A, Hematology, Oncology, and Pneumology, University of Muenster, Muenster, Germany.
- West German Cancer Center, University Hospital Muenster, Muenster, Germany.
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Huang DN, Zeng Y, Ding HR, Zhang ZK, Wang Y, Han DX, Zhang XZ, Song LG. Characteristics of bone metabolism in the male patients with diabetic neuropathy. J Chin Med Assoc 2024; 87:292-298. [PMID: 38289285 DOI: 10.1097/jcma.0000000000001062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/06/2024] Open
Abstract
BACKGROUND This study aimed to evaluate the characteristics of bone metabolism and fracture risk in the type 2 diabetes mellitus (T2DM) patients with distal symmetric polyneuropathy (DSPN). METHODS A total of 198 T2DM individuals were recruited from January 2017 to December 2020. Patients with DSPN were evaluated by strict clinical and sensory thresholds. Biochemical parameters and bone mineral density (BMD) were measured. The BMD, bone turnover markers, and probability of fracture were compared between two groups, and the factors related to BMD and probability of hip fracture in 10 years were further explored. RESULTS Compared with type 2 diabetes mellitus without distal symmetric polyneuropathy (T2DN-) patients, type 2 diabetes mellitus with distal symmetric polyneuropathy (T2DN+) patients had lower level of cross-linked C-telopeptide (CTX) (0.32 ± 0.19 vs 0.38 ± 0.21 ng/mL, p = 0.038) and higher level of bone-specific alkaline phosphatase (BALP) (15.28 ± 5.56 vs 12.58 ± 4.41 μg/mL, p = 0.003). T2DN+ patients had higher BMD of lumbar L1-L4 (1.05 ± 0.19 vs 0.95 ± 0.37, p = 0.027) and higher probability of hip fracture (0.98 ± 0.88 vs 0.68 ± 0.63, p = 0.009) as compared to T2DN- individuals. Univariate correlation analysis showed that BALP level (coefficient (coef) = -0.054, p = 0.038), CTX level (coef = -2.28, p = 0.001), and hip fracture risk (coef = -1.02, p < 0.001) were negatively related to the BMD of L1-L4. As for the risk of hip fracture evaluated by WHO Fracture Risk Assessment Tool (FRAX), age (coef = 0.035, p < 0.001), use of insulin (coef = 0.31, p =0.015), and levels of BALP (coef = 0.031, p = 0.017) and CTX (coef = 0.7, p = 0.047) were positively related to the risk of hip fracture. Multivariate regression analysis showed that CTX level (coef = -1.41, p = 0.043) was still negatively related to BMD at the lumbar spine. CONCLUSION This study indicates that T2DM patients with DSPN have special bone metabolism represented by higher BALP level and lower CTX level which may increase BMD at the lumbar spine.
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Affiliation(s)
- Dong-Ni Huang
- Department of Endocrinology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
- Institute of Osteoporosis and Metabolic Bone Diseases, School of Medicine, Tongji University, Shanghai, China
| | - Yue Zeng
- Department of Endocrinology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
- Institute of Osteoporosis and Metabolic Bone Diseases, School of Medicine, Tongji University, Shanghai, China
| | - Hui-Ru Ding
- Department of Endocrinology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
- Institute of Osteoporosis and Metabolic Bone Diseases, School of Medicine, Tongji University, Shanghai, China
| | - Zi-Kai Zhang
- Division of Science and Research, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Yu Wang
- Department of Endocrinology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
- Institute of Osteoporosis and Metabolic Bone Diseases, School of Medicine, Tongji University, Shanghai, China
| | - Dong-Xu Han
- Department of Endocrinology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
- Institute of Osteoporosis and Metabolic Bone Diseases, School of Medicine, Tongji University, Shanghai, China
| | - Xiu-Zhen Zhang
- Department of Endocrinology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
- Institute of Osteoporosis and Metabolic Bone Diseases, School of Medicine, Tongji University, Shanghai, China
| | - Li-Ge Song
- Department of Endocrinology, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
- Institute of Osteoporosis and Metabolic Bone Diseases, School of Medicine, Tongji University, Shanghai, China
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10
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Hegarty-Cremer SGD, Borggaard XG, Andreasen CM, van der Eerden BCJ, Simpson MJ, Andersen TL, Buenzli PR. How osteons form: A quantitative hypothesis-testing analysis of cortical pore filling and wall asymmetry. Bone 2024; 180:116998. [PMID: 38184100 DOI: 10.1016/j.bone.2023.116998] [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: 11/02/2023] [Revised: 12/06/2023] [Accepted: 12/24/2023] [Indexed: 01/08/2024]
Abstract
Osteon morphology provides valuable information about the interplay between different processes involved in bone remodelling. The correct quantitative interpretation of these morphological features is challenging due to the complexity of interactions between osteoblast behaviour, and the evolving geometry of cortical pores during pore closing. We present a combined experimental and mathematical modelling study to provide insights into bone formation mechanisms during cortical bone remodelling based on histological cross-sections of quiescent human osteons and hypothesis-testing analyses. We introduce wall thickness asymmetry as a measure of the local asymmetry of bone formation within an osteon and examine the frequency distribution of wall thickness asymmetry in cortical osteons from human iliac crest bone samples from women 16-78 years old. Our measurements show that most osteons possess some degree of asymmetry, and that the average degree of osteon asymmetry in cortical bone evolves with age. We then propose a comprehensive mathematical model of cortical pore filling that includes osteoblast secretory activity, osteoblast elimination, osteoblast embedment as osteocytes, and osteoblast crowding and redistribution along the bone surface. The mathematical model is first calibrated to symmetric osteon data, and then used to test three mechanisms of asymmetric wall formation against osteon data: (i) delays in the onset of infilling around the cement line; (ii) heterogeneous osteoblastogenesis around the bone perimeter; and (iii) heterogeneous osteoblast secretory rate around the bone perimeter. Our results suggest that wall thickness asymmetry due to off-centred Haversian pores within osteons, and that nonuniform lamellar thicknesses within osteons are important morphological features that can indicate the prevalence of specific asymmetry-generating mechanisms. This has significant implications for the study of disruptions of bone formation as it could indicate what biological bone formation processes may become disrupted with age or disease.
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Affiliation(s)
- Solene G D Hegarty-Cremer
- School of Mathematical Sciences, Queensland University of Technology (QUT), Brisbane, Australia; Department of Mathematics and Statistics, The University of Montreal, Montreal, Canada
| | - Xenia G Borggaard
- Clinical Cell Biology, Pathology Research Unit, Dept. of Clinical Research, and Dept. of Molecular Medicine, University of Southern Denmark, Odense, Denmark; Dept. of Pathology, Odense University Hospital, Odense, Denmark
| | - Christina M Andreasen
- Clinical Cell Biology, Pathology Research Unit, Dept. of Clinical Research, and Dept. of Molecular Medicine, University of Southern Denmark, Odense, Denmark; Dept. of Pathology, Odense University Hospital, Odense, Denmark
| | | | - Matthew J Simpson
- School of Mathematical Sciences, Queensland University of Technology (QUT), Brisbane, Australia
| | - Thomas L Andersen
- Clinical Cell Biology, Pathology Research Unit, Dept. of Clinical Research, and Dept. of Molecular Medicine, University of Southern Denmark, Odense, Denmark; Dept. of Pathology, Odense University Hospital, Odense, Denmark; Dept. of Forensic Medicine, Aarhus University, Aarhus, Denmark
| | - Pascal R Buenzli
- School of Mathematical Sciences, Queensland University of Technology (QUT), Brisbane, Australia.
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11
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Robin M, Djediat C, Bardouil A, Baccile N, Chareyron C, Zizak I, Fratzl P, Selmane M, Haye B, Genois I, Krafft J, Costentin G, Azaïs T, Artzner F, Giraud‐Guille M, Zaslansky P, Nassif N. Acidic Osteoid Templates the Plywood Structure of Bone Tissue. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2304454. [PMID: 38115757 PMCID: PMC10916609 DOI: 10.1002/advs.202304454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 11/18/2023] [Indexed: 12/21/2023]
Abstract
Bone is created by osteoblasts that secrete osteoid after which an ordered texture emerges, followed by mineralization. Plywood geometries are a hallmark of many trabecular and cortical bones, yet the origin of this texturing in vivo has never been shown. Nevertheless, extensive in vitro work revealed how plywood textures of fibrils can emerge from acidic molecular cholesteric collagen mesophases. This study demonstrates in sheep, which is the preferred model for skeletal orthopaedic research, that the deeper non-fibrillar osteoid is organized in a liquid-crystal cholesteric geometry. This basophilic domain, rich in acidic glycosaminoglycans, exhibits low pH which presumably fosters mesoscale collagen molecule ordering in vivo. The results suggest that the collagen fibril motif of twisted plywood matures slowly through self-assembly thermodynamically driven processes as proposed by the Bouligand theory of biological analogues of liquid crystals. Understanding the steps of collagen patterning in osteoid-maturation processes may shed new light on bone pathologies that emerge from collagen physico-chemical maturation imbalances.
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Affiliation(s)
- Marc Robin
- CNRS, Sorbonne Université, Collège de FranceLaboratoire Chimie de la Matière Condensée de Paris (LCMCP)ParisF‐75005France
| | - Chakib Djediat
- Muséum National d'Histoire NaturelleUMR CNRS 7245, Bâtiment 39, CP 39, 57 rue CuvierParis75231France
| | - Arnaud Bardouil
- Université de Rennes, CNRSInstitut de Physique de Rennes (IPR)RennesF‐35000France
| | - Niki Baccile
- CNRS, Sorbonne Université, Collège de FranceLaboratoire Chimie de la Matière Condensée de Paris (LCMCP)ParisF‐75005France
| | - Camille Chareyron
- CNRS, Sorbonne Université, Collège de FranceLaboratoire Chimie de la Matière Condensée de Paris (LCMCP)ParisF‐75005France
| | - Ivo Zizak
- Helmholtz‐Zentrum Berlin für Materialien und Energie – Speicherring BESSY IIAlbert‐Einstein Str. 15D‐12349BerlinGermany
| | - Peter Fratzl
- Department of BiomaterialsMax Planck Institute of Colloids and Interfacesam Mühlenberg 114476PotsdamGermany
| | - Mohamed Selmane
- Institut des Matériaux de Paris CentreSorbonne UniversitéParisF‐75005France
| | - Bernard Haye
- CNRS, Sorbonne Université, Collège de FranceLaboratoire Chimie de la Matière Condensée de Paris (LCMCP)ParisF‐75005France
| | - Isabelle Genois
- CNRS, Sorbonne Université, Collège de FranceLaboratoire Chimie de la Matière Condensée de Paris (LCMCP)ParisF‐75005France
| | - Jean‐Marc Krafft
- Sorbonne Université, CNRSLaboratoire Réactivité de Surface (LRS)ParisF‐75005France
| | - Guylène Costentin
- Sorbonne Université, CNRSLaboratoire Réactivité de Surface (LRS)ParisF‐75005France
| | - Thierry Azaïs
- CNRS, Sorbonne Université, Collège de FranceLaboratoire Chimie de la Matière Condensée de Paris (LCMCP)ParisF‐75005France
| | - Franck Artzner
- Université de Rennes, CNRSInstitut de Physique de Rennes (IPR)RennesF‐35000France
| | - Marie‐Madeleine Giraud‐Guille
- CNRS, Sorbonne Université, Collège de FranceLaboratoire Chimie de la Matière Condensée de Paris (LCMCP)ParisF‐75005France
| | - Paul Zaslansky
- Department for OperativePreventive and Pediatric DentistryCharité – Universitätsmedizin BerlinAßmannshauser Str. 4–614197BerlinGermany
| | - Nadine Nassif
- CNRS, Sorbonne Université, Collège de FranceLaboratoire Chimie de la Matière Condensée de Paris (LCMCP)ParisF‐75005France
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12
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Jiang C, Zhu S, Zhan W, Lou L, Li A, Cai J. Comparative analysis of bone turnover markers in bone marrow and peripheral blood: implications for osteoporosis. J Orthop Surg Res 2024; 19:163. [PMID: 38429649 PMCID: PMC10908102 DOI: 10.1186/s13018-024-04634-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Accepted: 02/21/2024] [Indexed: 03/03/2024] Open
Abstract
INTRODUCTION This study examines bone turnover marker (BTM) variations between bone marrow and peripheral blood in osteoporotic and non-osteoporotic patients. BTMs offer insights into bone remodeling, crucial for understanding osteoporosis. METHODS A total of 133 patients were categorized into osteoporotic and non-osteoporotic cohorts. BTMs-C-telopeptide cross-linked type 1 collagen (β-CTX), serum osteocalcin (OC), Procollagen type I N-propeptide (P1NP), 25(OH)D-were measured in bone marrow and peripheral blood. Lumbar spine bone mineral density (BMD) was assessed. RESULTS Osteoporotic patients exhibited elevated β-CTX and OC levels in peripheral blood, indicating heightened bone resorption and turnover. β-CTX levels in osteoporotic bone marrow were significantly higher. Negative correlations were found between peripheral blood β-CTX and OC levels and lumbar spine BMD, suggesting their potential as osteoporosis severity indicators. No such correlations were observed with bone marrow markers. When analyzing postmenopausal women separately, we obtained consistent results. CONCLUSIONS Elevated β-CTX and OC levels in osteoporotic peripheral blood highlight their diagnostic significance. Negative β-CTX and OC-BMD correlations underscore their potential for assessing osteoporosis severity. Discrepancies between peripheral blood and bone marrow markers emphasize the need for further exploration. This research advances our understanding of BTM clinical applications in osteoporosis diagnosis and treatment.
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Affiliation(s)
- Chuan Jiang
- College of Medicine, Yangzhou University, Yangzhou, 225001, China
- Department of Orthopedics, Clinical Medical College, Yangzhou University, Yangzhou, 225001, China
| | - Sibo Zhu
- Department of Orthopedics, Dalian Medical University, Dalian, 116000, China
| | - Wanda Zhan
- College of Medicine, Yangzhou University, Yangzhou, 225001, China
- Department of Orthopedics, Clinical Medical College, Yangzhou University, Yangzhou, 225001, China
| | - Linbing Lou
- Department of Orthopedics, Dalian Medical University, Dalian, 116000, China
| | - Aoying Li
- Department of Orthopedics, Dalian Medical University, Dalian, 116000, China
| | - Jun Cai
- Department of Orthopedics, Clinical Medical College, Yangzhou University, Yangzhou, 225001, China.
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13
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Fan H, Qiao Z, Li J, Shang G, Shang C, Chen S, Leng Z, Su H, Kou H, Liu H. Recent advances in senescence-associated secretory phenotype and osteoporosis. Heliyon 2024; 10:e25538. [PMID: 38375248 PMCID: PMC10875379 DOI: 10.1016/j.heliyon.2024.e25538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 01/29/2024] [Accepted: 01/29/2024] [Indexed: 02/21/2024] Open
Abstract
The worldwide elderly population is on the rise, and aging is a major osteoporosis risk factor. Senescent cells accumulation can have a detrimental effect the body as we age. The senescence-associated secretory phenotype (SASP), an essential cellular senescence hallmark, is an important mechanism connecting cellular senescence to osteoporosis. This review describes in detail the characteristics of SASPs and their regulatory agencies, and shed fresh light on how SASPs from different senescent cells contribute to osteoporosis development. Furthermore, we summarized various innovative therapy techniques that target SASPs to lower the burden of osteoporosis in the elderly and discussed the potential challenges of SASPs-based therapy for osteoporosis as a new clinical trial.
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Affiliation(s)
- Haonan Fan
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - Zhi Qiao
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - Jitian Li
- Henan Luoyang Orthopedic Hospital (Henan Provincial Orthopedic Hospital)/Henan Institute of Orthopedic and Traumatology, Luoyang 471000, China
| | - Guowei Shang
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - Chunfeng Shang
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - Songfeng Chen
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - Zikuan Leng
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - Huifang Su
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - Hongwei Kou
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - Hongjian Liu
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
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14
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Loundagin LL, Harrison KD, Wei X, Cooper DML. Understanding basic multicellular unit activity in cortical bone through 3D morphological analysis: New methods to define zones of the remodeling space. Bone 2024; 179:116960. [PMID: 37972746 DOI: 10.1016/j.bone.2023.116960] [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: 05/31/2023] [Revised: 09/27/2023] [Accepted: 11/08/2023] [Indexed: 11/19/2023]
Abstract
The activity of basic multicellular units (BMU) in cortical bone is classically described as a sequential order of events- resorption, reversal and formation. This simplified portrayal of the remodeling process is pervasive despite the reported variability in remodeling space morphology. These variations may reflect meaningful nuances in BMU activity but methods to quantify 3D remodeling space morphology within the context of the cellular activity are currently lacking. This study developed new techniques to define zones of BMU activity based on the 3D morphology of remodeling spaces in rabbit cortical bone and integrated morphological data with the BMU longitudinal erosion rate (LER) to elucidate the spatial-temporal coordination of BMUs and estimate mineral apposition rate (MAR). The tibiae of New Zealand white rabbits (n = 5) were imaged in vivo using synchrotron radiation and two weeks later ex vivo with desktop microCT. The in vivo and ex vivo datasets were co-registered, and 27 remodeling spaces were identified at both timepoints. A radial profile representing the 3D morphology was the platform for partitioning the remodeling spaces into resorption, reversal and formation zones. Manual, automated and semi-automated partitioning approaches were compared, and the zone-segmentations were used to calculate the length, change in radius and slope of each zone. The manual approach most accurately defined the zones of idealized remodeling spaces with known dimensions (relative error = 0.9-9.2 %) while the semi-automated method reliably defined the zones in rabbit remodeling spaces (ICC = 0.85-1.00). Combining LER and the manually derived zone dimensions indicated that a BMU passes through a cross-section in approximately 18.8 days with resorption, reversal and formation taking 4.1, 2.2, and 12.5 days, respectively. MAR estimated by the 3D analysis was not significantly different than that determined with classic histomorphometry (p = 0.48). These techniques have the potential to assess dynamic parameters of bone resorption and formation, eliminate the need for fluorochrome labeling and provide a more comprehensive perspective of the remodeling process.
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Affiliation(s)
- Lindsay L Loundagin
- Department of Anatomy, Physiology and Pharmacology, College of Medicine, University of Saskatchewan, Saskatoon, Canada.
| | - Kim D Harrison
- Department of Anatomy, Physiology and Pharmacology, College of Medicine, University of Saskatchewan, Saskatoon, Canada
| | - Xuan Wei
- Department of Anatomy, Physiology and Pharmacology, College of Medicine, University of Saskatchewan, Saskatoon, Canada
| | - David M L Cooper
- Department of Anatomy, Physiology and Pharmacology, College of Medicine, University of Saskatchewan, Saskatoon, Canada
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15
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Le T, Salas Sanchez A, Nashawi D, Kulkarni S, Prisby RD. Diabetes and the Microvasculature of the Bone and Marrow. Curr Osteoporos Rep 2024; 22:11-27. [PMID: 38198033 DOI: 10.1007/s11914-023-00841-3] [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] [Accepted: 12/04/2023] [Indexed: 01/11/2024]
Abstract
PURPOSE OF REVIEW The purpose of this review is to highlight the evidence of microvascular dysfunction in bone and marrow and its relation to poor skeletal outcomes in diabetes mellitus. RECENT FINDINGS Diabetes mellitus is characterized by chronic hyperglycemia, which may lead to microangiopathy and macroangiopathy. Micro- and macroangiopathy have been diagnosed in Type 1 and Type 2 diabetes, coinciding with osteopenia, osteoporosis, enhanced fracture risk and delayed fracture healing. Microangiopathy has been reported in the skeleton, correlating with reduced blood flow and perfusion, vasomotor dysfunction, microvascular rarefaction, reduced angiogenic capabilities, and augmented vascular permeability. Microangiopathy within the skeleton may be detrimental to bone and manifest as, among other clinical abnormalities, reduced mass, enhanced fracture risk, and delayed fracture healing. More investigations are required to elucidate the various mechanisms by which diabetic microvascular dysfunction impacts the skeleton.
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Affiliation(s)
- Teresa Le
- Bone Vascular and Microcirculation Laboratory, Department of Kinesiology, University of Texas at Arlington, Arlington, TX, 76019, USA
| | - Amanda Salas Sanchez
- Bone Vascular and Microcirculation Laboratory, Department of Kinesiology, University of Texas at Arlington, Arlington, TX, 76019, USA
| | - Danyah Nashawi
- Bone Vascular and Microcirculation Laboratory, Department of Kinesiology, University of Texas at Arlington, Arlington, TX, 76019, USA
| | - Sunidhi Kulkarni
- Bone Vascular and Microcirculation Laboratory, Department of Kinesiology, University of Texas at Arlington, Arlington, TX, 76019, USA
| | - Rhonda D Prisby
- Bone Vascular and Microcirculation Laboratory, Department of Kinesiology, University of Texas at Arlington, Arlington, TX, 76019, USA.
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16
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Takito J, Nonaka N. Osteoclasts at Bone Remodeling: Order from Order. Results Probl Cell Differ 2024; 71:227-256. [PMID: 37996681 DOI: 10.1007/978-3-031-37936-9_12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
Osteoclasts are multinucleated bone-resorbing cells derived from the monocyte/macrophage lineage. The macrophage colony-stimulating factor/receptor activator of nuclear factor κB ligand (M-CSF/RANKL) signaling network governs the differentiation of precursor cells into fusion-competent mononucleated cells. Repetitive fusion of fusion-competent cells produces multinucleated osteoclasts. Osteoclasts are believed to die via apoptosis after bone resorption. However, recent studies have found that osteoclastogenesis in vivo proceeds by replacing the old nucleus of existing osteoclasts with a single newly differentiated mononucleated cell. Thus, the formation of new osteoclasts is minimal. Furthermore, the sizes of osteoclasts can change via cell fusion and fission in response to external conditions. On the other hand, osteoclastogenesis in vitro involves various levels of heterogeneity, including osteoclast precursors, mode of fusion, and properties of the differentiated osteoclasts. To better understand the origin of these heterogeneities and the plasticity of osteoclasts, we examine several processes of osteoclastogenesis in this review. Candidate mechanisms that create heterogeneity involve asymmetric cell division, osteoclast niche, self-organization, and mode of fusion and fission. Elucidation of the plasticity or fluctuation of the M-CSF/RANKL network should be an important topic for future researches.
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Affiliation(s)
- Jiro Takito
- Department of Oral Anatomy and Developmental Biology, School of Dentistry, Showa University, Tokyo, Japan.
| | - Naoko Nonaka
- Department of Oral Anatomy and Developmental Biology, School of Dentistry, Showa University, Tokyo, Japan
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17
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Dsouza C, Komarova SV. Mechanosensitivity and mechanotransductive properties of osteoclasts. Am J Physiol Cell Physiol 2024; 326:C95-C106. [PMID: 37982175 DOI: 10.1152/ajpcell.00347.2023] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 11/13/2023] [Accepted: 11/13/2023] [Indexed: 11/21/2023]
Abstract
Mechanical loading is essential for maintaining bone health. Here, we aimed to investigate the role of ATP and ADP in the mechanotransduction of bone-resorptive osteoclasts. Single osteoclast in primary cultures from 10 to 12-wk-old mice was mechanically stimulated by a gentle touch with a micropipette. Changes in cytosolic free calcium [Ca2+]i were analyzed in Fura-2 loaded osteoclasts. The cell injury was assessed by analyzing the cellular Fura-2 loss and classified as severe or mild using k-means. Osteoclasts responded to mechanical stimuli with transient calcium elevation (primary responders) and transduced these signals to neighboring cells, which responded with delayed calcium elevations (secondary responders). Severely injured osteoclasts had higher calcium transients than mildly injured cells. Fluid shear stress similarly induced reversible cell injury in osteoclasts. Secondary responses were abolished by treatment with A-804598, a specific inhibitor of P2X7, but not suramin, a broad P2 receptor blocker. Osteoclasts responded to ATP and ADP with concentration-dependent changes in [Ca2+]i. We performed osteoclast micropipette stimulation in the presence of phosphoenolpyruvate and pyruvate kinase which converted all ADP in solution to ATP, or with hexokinase converting all ATP to ADP. Osteoclasts with mild membrane injury demonstrated similar calcium responses in ATP and ADP-rich environments. However, when the mechanotransductive signal to severe osteoclast injury was converted to ADP, the fraction of secondary responders and their [Ca2+]i amplitude was higher. This study suggests the importance of osteoclast mechanobiology and the role of ADP-mediated signaling in conditions of altered mechanical loading associated with bone loss.NEW & NOTEWORTHY Osteoclasts are rarely considered as cells that participate in mechanical signaling in bone. We show that osteoclasts are capable of sensing and transmitting mechanical signals to neighboring cells. Mechanical stimulation commonly induces minor repairable membrane injury in osteoclasts. ATP and especially ADP were found to play important roles in the mechanoresponsiveness of osteoclasts. This study highlights the importance of osteoclast mechanobiology especially in conditions of altered mechanical loading associated with bone loss, such as in microgravity.
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Affiliation(s)
- Chrisanne Dsouza
- Department of Experimental Surgery, McGill University, Montreal, Quebec, Canada
- Shriners Hospitals for Children-Canada, Montreal, Quebec, Canada
| | - Svetlana V Komarova
- Department of Experimental Surgery, McGill University, Montreal, Quebec, Canada
- Shriners Hospitals for Children-Canada, Montreal, Quebec, Canada
- Faculty of Dental Medicine and Oral Health Sciences, McGill University, Montreal, Quebec, Canada
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18
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Hoshi-Numahata M, Takakura A, Nakanishi-Kimura A, Watanabe H, Takada K, Nishiura M, Sato Y, Takao-Kawabata R, Iimura T. Evaluation of cortical bone remodeling in canines treated with daily and weekly administrations of teriparatide by establishing AI-driven morphometric analyses and GIS-based spatial mapping. Bone Rep 2023; 19:101720. [PMID: 37915737 PMCID: PMC10616120 DOI: 10.1016/j.bonr.2023.101720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 10/04/2023] [Accepted: 10/09/2023] [Indexed: 11/03/2023] Open
Abstract
Larger animal models with a well-developed Haversian system, as observed in humans, are ideal to analyze cortical bone remodeling in pharmacological studies of anti-osteoporosis drugs, although they have some limitations in controlling individual variability in size, weight, age, and number. This study aimed to morphometrically analyze cortical bone remodeling focusing on Haversian canals in dogs using four regimens of TPTD with daily and weekly administrations at lower and higher weekly doses (4.9 μg/kg/week and 19.8 μg/kg/week, respectively) for 9 months. A micro-computed tomography-based analysis showed no significant differences among regimen groups. By establishing artificial intelligence (AI)-driven morphometric analyses and geographical information system (GIS)-based spatial mapping of Haversian canals that does not require confocal microscopy but is possible with more commonly used wide field microscopes, we successfully observed significant morphometric distinctions among regimens applied even in dogs. Our analytical results suggested that the daily higher regimen specifically increased the number of eroded pores creating spaces between existing canals, thus stimulating cortical bone remodeling.
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Affiliation(s)
- Marie Hoshi-Numahata
- Department of Pharmacology, Faculty and Graduate School of Dental Medicine, Hokkaido University, N13 W7, Sapporo 060-8586, Japan
- Department of Orthodontics, Faculty and Graduate School of Dental Medicine, Hokkaido University, N13 W7, Sapporo 060-8586, Japan
| | - Aya Takakura
- Pharmaceuticals Research Center, Asahi Kasei Pharma Corporation, 632-1 Mifuku, Izunokuni, Shizuoka 410-2321, Japan
| | - Atsuko Nakanishi-Kimura
- Department of Pharmacology, Faculty and Graduate School of Dental Medicine, Hokkaido University, N13 W7, Sapporo 060-8586, Japan
- Department of Orthodontics, Faculty and Graduate School of Dental Medicine, Hokkaido University, N13 W7, Sapporo 060-8586, Japan
| | - Haruhisa Watanabe
- Department of Pharmacology, Faculty and Graduate School of Dental Medicine, Hokkaido University, N13 W7, Sapporo 060-8586, Japan
- Department of Oral Medicine and Diagnostics, Faculty and Graduate School of Dental Medicine, Hokkaido University, N13 W7, Sapporo 060-8586, Japan
| | - Kentaro Takada
- Department of Natural History Sciences, Graduate School of Science, Hokkaido University, N10 W8, Sapporo 060-8010, Japan
| | - Mai Nishiura
- Department of Pharmacology, Faculty and Graduate School of Dental Medicine, Hokkaido University, N13 W7, Sapporo 060-8586, Japan
- Department of Dentistry for Children and Disabled Persons, Faculty and Graduate School of Dental Medicine, Hokkaido University, N13 W7, Sapporo 060-8586, Japan
| | - Yoshiaki Sato
- Department of Orthodontics, Faculty and Graduate School of Dental Medicine, Hokkaido University, N13 W7, Sapporo 060-8586, Japan
| | - Ryoko Takao-Kawabata
- Pharmaceuticals Research Center, Asahi Kasei Pharma Corporation, 632-1 Mifuku, Izunokuni, Shizuoka 410-2321, Japan
| | - Tadahiro Iimura
- Department of Pharmacology, Faculty and Graduate School of Dental Medicine, Hokkaido University, N13 W7, Sapporo 060-8586, Japan
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19
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van Dijk Christiansen P, Andreasen CM, El-Masri BM, Laursen KS, Delaisse JM, Andersen TL. Osteoprogenitor recruitment and differentiation during intracortical bone remodeling of adolescent humans. Bone 2023; 177:116896. [PMID: 37699496 DOI: 10.1016/j.bone.2023.116896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 08/17/2023] [Accepted: 09/08/2023] [Indexed: 09/14/2023]
Abstract
BACKGROUND Recruitment and proliferation of osteoprogenitors during the reversal-resorption phase, and their differentiation into mature bone-forming osteoblasts is crucial for initiation of bone formation during bone remodeling. This study investigates the osteoprogenitors' gradual recruitment, proliferation, and differentiation into bone-forming osteoblasts within intracortical remodeling events of healthy adolescent humans. METHODS The study was conducted on cortical bone specimens from 11 adolescent human controls - patients undergoing surgery due to coxa valga. The osteoprogenitor recruitment route and differentiation into osteoblasts were backtracked using immunostainings and in situ hybridizations with osteoblastic markers (CD271/NGFR, osterix/SP7, COL3A1 and COL1A1). The osteoblastic cell populations were defined based on the pore surfaces, and their proliferation index (Ki67), density and number/circumference were estimated in multiplex-immunofluorescence (Ki67, TRAcP, CD34) stained sections. RESULTS During the reversal-resorption phase, osteoclasts are intermixed with (COL3A1+NFGR+) osteoblastic reversal cells, which are considered to be osteoprogenitors of (COL1A1+SP7+) bone-forming osteoblasts. Initiation of bone formation requires a critical density of these osteoprogenitors (43 ± 9 cells/mm), which is reached though proliferation (4.4 ± 0.5 % proliferative) and even more so through recruitment of osteoprogenitors, but challenged by the ongoing expansion of the canal circumference. These osteoprogenitors most likely originate from osteoblastic bone lining cells and mainly lumen osteoprogenitors, which expand their population though proliferation (4.6 ± 0.3 %) and vascular recruitment. These lumen osteoprogenitors resemble canopy cells above trabecular remodeling sites, and like canopy cells they extend above bone-forming osteoblasts where they may rejuvenate the osteoblast population during bone formation. CONCLUSION Initiation of bone formation during intracortical remodeling requires a critical density of osteoprogenitors on eroded surfaces, which is reached though proliferation and recruitment of local osteoprogenitors: bone lining cells and lumen osteoprogenitors.
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Affiliation(s)
- Pernille van Dijk Christiansen
- Clinical Cell Biology, Research Unit of Pathology, Department of Pathology, Odense University Hospital and Department of Clinical Research, University of Southern Denmark, Odense, Denmark.
| | - Christina Møller Andreasen
- Clinical Cell Biology, Research Unit of Pathology, Department of Pathology, Odense University Hospital and Department of Clinical Research, University of Southern Denmark, Odense, Denmark; Department of Molecular Medicine, University of Southern Denmark, Odense, Denmark; Danish Spatial Imaging Consortium (DanSIC).
| | - Bilal Mohamad El-Masri
- Clinical Cell Biology, Research Unit of Pathology, Department of Pathology, Odense University Hospital and Department of Clinical Research, University of Southern Denmark, Odense, Denmark; Danish Spatial Imaging Consortium (DanSIC).
| | - Kaja Søndergaard Laursen
- Department of Forensic Medicine, Aarhus University, Aarhus, Denmark; Danish Spatial Imaging Consortium (DanSIC).
| | - Jean-Marie Delaisse
- Clinical Cell Biology, Research Unit of Pathology, Department of Pathology, Odense University Hospital and Department of Clinical Research, University of Southern Denmark, Odense, Denmark; Department of Molecular Medicine, University of Southern Denmark, Odense, Denmark.
| | - Thomas Levin Andersen
- Clinical Cell Biology, Research Unit of Pathology, Department of Pathology, Odense University Hospital and Department of Clinical Research, University of Southern Denmark, Odense, Denmark; Department of Molecular Medicine, University of Southern Denmark, Odense, Denmark; Department of Forensic Medicine, Aarhus University, Aarhus, Denmark; Danish Spatial Imaging Consortium (DanSIC).
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20
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Jafariandehkordi A, Daneshmehr A. Studying the mechanical properties of the mandible and injury prediction under the effect of ossification factors. J Mech Behav Biomed Mater 2023; 148:106209. [PMID: 37918338 DOI: 10.1016/j.jmbbm.2023.106209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 10/19/2023] [Accepted: 10/23/2023] [Indexed: 11/04/2023]
Abstract
BACKGROUND AND OBJECTIVE It is essential to know the quantitative interactions between biological tissues and external mechanical and chemical stimuli. This assists the physicians to better know the quantitative behavior of the tissue and plan more effective therapy. In the literature, the effect of the chemical and mechanical loading was investigated on the bone biological cell activities and some mechanical features, but a lack of prediction of bone injury under the chemical and mechanical factors was sensed. Therefore, the present study aims to investigate the effects of the application of major chemical factors involved in ossification, including RANKL1 (Receptor Activator of Nuclear Factor Kappa Beta Ligand), PTH2 (Parathyroid Hormone), and OPG3 (Osteoprotegerin) on the mandibular bone biological osteoblast and osteoclast activities and mechanical properties. Moreover, the study assesses the bone injury possibility under uniform mastication pressure applied on the premolar tooth in terms of the mechanostat theory undergoing the effects of the chemical factors. METHODS A 3D geometry of the mandible-tooth assembly was generated from the CT image dataset. The geometry was next purified, solidified, and exported to FEM4 (Finite Element Method) software to be meshed, where boundary conditions and loading were applied. Moreover, the mathematical system of differential equations to model the chemical factor effects on osteoblast and osteoclast activities as well as bone matrix volume fraction and elastic stiffness relations were applied. Next, the values of the equivalent strain were calculated to predict the injury states of the bone. RESULTS The results complied with the literature data. The results showed that RANKL and PTH increased the values of the equivalent strain from 450 με to 11500 με, while OPG reduced that from 450 με to 300 με. CONCLUSIONS Therefore, RANKL and PTH doses of this study put the bone at risk of injury compared to the baseline of no dose applied, while OPG secured the bone from injury.
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21
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Cooper DML, Harrison KD, Hiebert BD, King GA, Panahifar A, Zhu N, Swekla KJ, Pivonka P, Chapman LD, Arnason T. Daily administration of parathyroid hormone slows the progression of basic multicellular units in the cortical bone of the rabbit distal tibia. Bone 2023; 176:116864. [PMID: 37574096 DOI: 10.1016/j.bone.2023.116864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 07/19/2023] [Accepted: 08/01/2023] [Indexed: 08/15/2023]
Abstract
Basic Multicellular Units (BMUs) conduct bone remodeling, a critical process of tissue turnover which, if imbalanced, can lead to disease, including osteoporosis. Parathyroid hormone (PTH 1-34; Teriparatide) is an osteoanabolic treatment for osteoporosis; however, it elevates the rate of intra-cortical remodeling (activation frequency) leading, at least transiently, to increased porosity. The purpose of this study was to test the hypothesis that PTH not only increases the rate at which cortical BMUs are initiated but also increases their progression (Longitudinal Erosion Rate; LER). Two groups (n = 7 each) of six-month old female New Zealand white rabbits were both administered 30 μg/kg of PTH once daily for a period of two weeks to induce remodeling. Their distal right tibiae were then imaged in vivo by in-line phase contrast micro-CT at the Canadian Light Source synchrotron. Over the following two weeks the first group (PTH) received continued daily PTH while the second withdrawal group (PTHW) was administrated 0.9 % saline. At four weeks all animals were euthanized, their distal tibiae were imaged by conventional micro-CT ex vivo and histomorphometry was performed. Matching micro-CT datasets (in vivo and ex vivo) were co-registered in 3D and LER was measured from 612 BMUs. Counter to our hypothesis, mean LER was lower (p < 0.001) in the PTH group (30.19 ± 3.01 μm/day) versus the PTHW group (37.20 ± 2.77 μm/day). Despite the difference in LER, osteonal mineral apposition rate (On.MAR) did not differ between groups indicating the anabolic effect of PTH was sustained after withdrawal. The slowing of BMU progression by PTH warrants further investigation; slowed resorption combined with elevated bone formation rate, may play an important role in how PTH enhances coupling between resorption and formation within the BMU. Finally, the prolonged anabolic response following withdrawal may have utility in terms of optimizing clinical dosing regimens.
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Affiliation(s)
- David M L Cooper
- Department of Anatomy, Physiology and Pharmacology, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
| | - Kim D Harrison
- Department of Anatomy, Physiology and Pharmacology, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Beverly D Hiebert
- Max Rady College of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Gavin A King
- Department of Anatomy, Physiology and Pharmacology, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Arash Panahifar
- BioMedical Imaging and Therapy Beamline, Canadian Light Source, Saskatoon, Saskatchewan, Canada; Department of Medical Imaging, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Ning Zhu
- BioMedical Imaging and Therapy Beamline, Canadian Light Source, Saskatoon, Saskatchewan, Canada
| | - Kurtis J Swekla
- Animal Care and Research Support Office, Office of the Vice-President of Research, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Peter Pivonka
- School of Mechanical, Medical, and Process Engineering, Queensland University of Technology, Brisbane, Australia
| | - L Dean Chapman
- Department of Anatomy, Physiology and Pharmacology, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Terra Arnason
- Department of Medicine, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
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22
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Sano H, Whitmarsh T, Skingle L, Shimakura T, Yamamoto N, Compston JE, Takahashi HE, Poole KES. Buds of new bone formation within the Femoral Head of Hip Fracture Patients Coincide with Zones of Low Osteocyte Sclerostin. J Bone Miner Res 2023; 38:1603-1611. [PMID: 37548352 DOI: 10.1002/jbmr.4898] [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: 02/19/2023] [Revised: 06/19/2023] [Accepted: 08/04/2023] [Indexed: 08/08/2023]
Abstract
Romosozumab treatment reduces the rate of hip fractures and increases hip bone density, increasing bone formation by inhibiting sclerostin protein. We studied the normal pattern of bone formation and osteocyte expression in the human proximal femur because it is relevant to both antisclerostin treatment effects and fracture. Having visualized and quantified buds of new bone formation in trabeculae, we hypothesized that they would coincide with areas of (a) higher mechanical stress and (b) low sclerostin expression by osteocytes. In patients with hip fracture, we visualized each bud of active modeling-based formation (forming minimodeling structure [FMiS]) in trabecular cores taken from different parts of the femoral head. Trabecular bone structure was also measured with high-resolution imaging. More buds of new bone formation (by volume) were present in the higher stress superomedial zone (FMiS density, N.FMiS/T.Ar) than lower stress superolateral (p < 0.05), and inferomedial (p < 0.001) regions. There were fewer sclerostin expressing osteocytes close to or within FMiS. FMiS density correlated with greater amount, thickness, number, and connectivity of trabeculae (bone volume BV/TV, r = 0.65, p < 0.0001; bone surface BS/TV, r = 0.47, p < 0.01; trabecular thickness Tb.Th, r = 0.55, p < 0.001; trabecular number Tb.N, r = 0.47, p < 0.01; and connectivity density Conn.D, r = 0.40, p < 0.05) and lower trabecular separation (Tb.Sp, r = -0.56, p < 0.001). These results demonstrate modeling-based bone formation in femoral trabeculae from patients with hip fracture as a potential therapeutic target to enhance bone structure. © 2023 American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Hiroshige Sano
- Department of Medicine, University of Cambridge, Cambridge, UK
- Niigata Bone Science Institute, Niigata, Japan
- Uchino Orthopedic Clinic, Niigata, Japan
| | | | - Linda Skingle
- Department of Medicine, University of Cambridge, Cambridge, UK
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23
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Orsini F, Crotti C, Cincinelli G, Di Taranto R, Amati A, Ferrito M, Varenna M, Caporali R. Bone Involvement in Rheumatoid Arthritis and Spondyloartritis: An Updated Review. BIOLOGY 2023; 12:1320. [PMID: 37887030 PMCID: PMC10604370 DOI: 10.3390/biology12101320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 10/02/2023] [Accepted: 10/06/2023] [Indexed: 10/28/2023]
Abstract
Several rheumatologic diseases are primarily distinguished by their involvement of bone tissue, which not only serves as a mere target of the condition but often plays a pivotal role in its pathogenesis. This scenario is particularly prominent in chronic inflammatory arthritis such as rheumatoid arthritis (RA) and spondyloarthritis (SpA). Given the immunological and systemic nature of these diseases, in this review, we report an overview of the pathogenic mechanisms underlying specific bone involvement, focusing on the complex interactions that occur between bone tissue's own cells and the molecular and cellular actors of the immune system, a recent and fascinating field of interest defined as osteoimmunology. Specifically, we comprehensively elaborate on the distinct pathogenic mechanisms of bone erosion seen in both rheumatoid arthritis and spondyloarthritis, as well as the characteristic process of aberrant bone formation observed in spondyloarthritis. Lastly, chronic inflammatory arthritis leads to systemic bone involvement, resulting in systemic bone loss and consequent osteoporosis, along with increased skeletal fragility.
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Affiliation(s)
- Francesco Orsini
- Department of Clinical Sciences and Community Health, Università degli Studi di Milano, 20122 Milan, Italy (A.A.)
- Department of Rheumatology and Medical Sciences, ASST G.Pini-CTO, 20122 Milan, Italy
| | - Chiara Crotti
- Bone Diseases Unit, Department of Rheumatology and Medical Sciences, ASST G.Pini-CTO, 20122 Milan, Italy
| | - Gilberto Cincinelli
- Department of Clinical Sciences and Community Health, Università degli Studi di Milano, 20122 Milan, Italy (A.A.)
- Department of Rheumatology and Medical Sciences, ASST G.Pini-CTO, 20122 Milan, Italy
| | - Raffaele Di Taranto
- Department of Clinical Sciences and Community Health, Università degli Studi di Milano, 20122 Milan, Italy (A.A.)
- Department of Rheumatology and Medical Sciences, ASST G.Pini-CTO, 20122 Milan, Italy
| | - Andrea Amati
- Department of Clinical Sciences and Community Health, Università degli Studi di Milano, 20122 Milan, Italy (A.A.)
- Department of Rheumatology and Medical Sciences, ASST G.Pini-CTO, 20122 Milan, Italy
| | - Matteo Ferrito
- Department of Clinical Sciences and Community Health, Università degli Studi di Milano, 20122 Milan, Italy (A.A.)
- Department of Rheumatology and Medical Sciences, ASST G.Pini-CTO, 20122 Milan, Italy
| | - Massimo Varenna
- Bone Diseases Unit, Department of Rheumatology and Medical Sciences, ASST G.Pini-CTO, 20122 Milan, Italy
| | - Roberto Caporali
- Department of Clinical Sciences and Community Health, Università degli Studi di Milano, 20122 Milan, Italy (A.A.)
- Department of Rheumatology and Medical Sciences, ASST G.Pini-CTO, 20122 Milan, Italy
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24
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Marahleh A, Kitaura H, Ohori F, Noguchi T, Mizoguchi I. The osteocyte and its osteoclastogenic potential. Front Endocrinol (Lausanne) 2023; 14:1121727. [PMID: 37293482 PMCID: PMC10244721 DOI: 10.3389/fendo.2023.1121727] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 04/07/2023] [Indexed: 06/10/2023] Open
Abstract
The skeleton is an organ of dual functionality; on the one hand, it provides protection and structural competence. On the other hand, it participates extensively in coordinating homeostasis globally given that it is a mineral and hormonal reservoir. Bone is the only tissue in the body that goes through strategically consistent bouts of bone resorption to ensure its integrity and organismal survival in a temporally and spatially coordinated process, known as bone remodeling. Bone remodeling is directly enacted by three skeletal cell types, osteoclasts, osteoblasts, and osteocytes; these cells represent the acting force in a basic multicellular unit and ensure bone health maintenance. The osteocyte is an excellent mechanosensory cell and has been positioned as the choreographer of bone remodeling. It is, therefore, not surprising that a holistic grasp of the osteocyte entity in the bone is warranted. This review discusses osteocytogenesis and associated molecular and morphological changes and describes the osteocytic lacunocanalicular network (LCN) and its organization. We highlight new knowledge obtained from transcriptomic analyses of osteocytes and discuss the regulatory role of osteocytes in promoting osteoclastogenesis with an emphasis on the case of osteoclastogenesis in anosteocytic bones. We arrive at the conclusion that osteocytes exhibit several redundant means through which osteoclast formation can be initiated. However, whether osteocytes are true "orchestrators of bone remodeling" cannot be verified from the animal models used to study osteocyte biology in vivo. Results from studying osteocyte biology using current animal models should come with the caveat that these models are not osteocyte-specific, and conclusions from these studies should be interpreted cautiously.
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Affiliation(s)
- Aseel Marahleh
- Frontier Research Institute for Interdisciplinary Sciences (FRIS), Tohoku University, Sendai, Japan
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Hideki Kitaura
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Fumitoshi Ohori
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Takahiro Noguchi
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Itaru Mizoguchi
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University, Sendai, Japan
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25
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Anwar A, Sapra L, Gupta N, Ojha RP, Verma B, Srivastava RK. Fine-tuning osteoclastogenesis: An insight into the cellular and molecular regulation of osteoclastogenesis. J Cell Physiol 2023. [PMID: 37183350 DOI: 10.1002/jcp.31036] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 04/21/2023] [Accepted: 04/25/2023] [Indexed: 05/16/2023]
Abstract
Osteoclasts, the bone-resorbing cells, are essential for the bone remodeling process and are involved in the pathophysiology of several bone-related diseases. The extensive corpus of in vitro research and crucial mouse model studies in the 1990s demonstrated the key roles of monocyte/macrophage colony-stimulating factor, receptor activator of nuclear factor kappa B ligand (RANKL) and integrin αvβ3 in osteoclast biology. Our knowledge of the molecular mechanisms by which these variables control osteoclast differentiation and function has significantly advanced in the first decade of this century. Recent developments have revealed a number of novel insights into the fundamental mechanisms governing the differentiation and functional activity of osteoclasts; however, these mechanisms have not yet been adequately documented. Thus, in the present review, we discuss various regulatory factors including local and hormonal factors, innate as well as adaptive immune cells, noncoding RNAs (ncRNAs), etc., in the molecular regulation of the intricate and tightly regulated process of osteoclastogenesis. ncRNAs have a critical role as epigenetic controllers of osteoclast physiologic activities, including differentiation and bone resorption. The primary ncRNAs, which include micro-RNAs, circular RNAs, and long noncoding RNAs, form a complex network that affects gene transcription activities associated with osteoclast biological activity. Greater knowledge of the involvement of ncRNAs in osteoclast biological activities will contribute to the treatment and management of several skeletal diseases such as osteoporosis, osteoarthritis, rheumatoid arthritis, etc. Moreover, we further outline potential therapies targeting these regulatory pathways of osteoclastogenesis in distinct bone pathologies.
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Affiliation(s)
- Aleena Anwar
- Translational Immunology, Osteoimmunology & Immunoporosis Lab (TIOIL), Department of Biotechnology, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Leena Sapra
- Translational Immunology, Osteoimmunology & Immunoporosis Lab (TIOIL), Department of Biotechnology, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Navita Gupta
- Department of Allied Health Sciences, Chitkara School of Health Sciences, Chitkara University, Chandigarh, Punjab, India
| | - Rudra P Ojha
- Department of Zoology, Nehru Gram Bharati University, Prayagraj, Uttar Pradesh, India
| | - Bhupendra Verma
- Translational Immunology, Osteoimmunology & Immunoporosis Lab (TIOIL), Department of Biotechnology, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Rupesh K Srivastava
- Translational Immunology, Osteoimmunology & Immunoporosis Lab (TIOIL), Department of Biotechnology, All India Institute of Medical Sciences (AIIMS), New Delhi, India
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26
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Sugimoto K, Zhou Y, Galindo TGP, Kimura R, Tagaya M. Investigation of Surface Layers on Biological and Synthetic Hydroxyapatites Based on Bone Mineralization Process. Biomimetics (Basel) 2023; 8:biomimetics8020184. [PMID: 37218770 DOI: 10.3390/biomimetics8020184] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/21/2023] [Accepted: 04/25/2023] [Indexed: 05/24/2023] Open
Abstract
In this review, the current status of the influence of added ions (i.e., SiO44-, CO32-, etc.) and surface states (i.e., hydrated and non-apatite layers) on the biocompatibility nature of hydroxyapatite (HA, Ca10(PO4)6(OH)2) is discussed. It is well known that HA is a type of calcium phosphate with high biocompatibility that is present in biological hard tissues such as bones and enamel. This biomedical material has been extensively studied due to its osteogenic properties. The chemical composition and crystalline structure of HA change depending on the synthetic method and the addition of other ions, thereby affecting the surface properties related to biocompatibility. This review illustrates the structural and surface properties of HA substituted with ions such as silicate, carbonate, and other elemental ions. The importance of the surface characteristics of HA and its components, the hydration layers, and the non-apatite layers for the effective control of biomedical function, as well as their relationship at the interface to improve biocompatibility, has been highlighted. Since the interfacial properties will affect protein adsorption and cell adhesion, the analysis of their properties may provide ideas for effective bone formation and regeneration mechanisms.
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Affiliation(s)
- Kazuto Sugimoto
- Department of Materials Science and Technology, Nagaoka University of Technology, Kamitomioka 1603-1, Nagaoka, Niigata 940-2188, Japan
| | - Yanni Zhou
- Department of Materials Science and Bioengineering, Nagaoka University of Technology, Kamitomioka 1603-1, Nagaoka, Niigata 940-2188, Japan
| | | | - Reo Kimura
- Department of Materials Science and Bioengineering, Nagaoka University of Technology, Kamitomioka 1603-1, Nagaoka, Niigata 940-2188, Japan
| | - Motohiro Tagaya
- Department of Materials Science and Bioengineering, Nagaoka University of Technology, Kamitomioka 1603-1, Nagaoka, Niigata 940-2188, Japan
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27
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Ramtani S, Sánchez JF, Boucetta A, Kraft R, Vaca-González JJ, Garzón-Alvarado DA. A coupled mathematical model between bone remodeling and tumors: a study of different scenarios using Komarova's model. Biomech Model Mechanobiol 2023; 22:925-945. [PMID: 36922421 PMCID: PMC10167202 DOI: 10.1007/s10237-023-01689-3] [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: 09/21/2022] [Accepted: 01/05/2023] [Indexed: 03/17/2023]
Abstract
This paper aims to construct a general framework of coupling tumor-bone remodeling processes in order to produce plausible outcomes of the effects of tumors on the number of osteoclasts, osteoblasts, and the frequency of the bone turnover cycle. In this document, Komarova's model has been extended to include the effect of tumors on the bone remodeling processes. Thus, we explored three alternatives for coupling tumor presence into Komarova's model: first, using a "damage" parameter that depends on the tumor cell concentration. A second model follows the original structure of Komarova, including the tumor presence in those equations powered up to a new parameter, called the paracrine effect of the tumor on osteoclasts and osteoblasts; the last model is replicated from Ayati and collaborators in which the impact of the tumor is included into the paracrine parameters. Through the models, we studied their stability and considered some examples that can reproduce the tumor effects seen in clinic and experimentally. Therefore, this paper has three parts: the exposition of the three models, the results and discussion (where we explore some aspects and examples of the solution of the models), and the conclusion.
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Affiliation(s)
- Salah Ramtani
- Laboratoire CSPBAT, equipe LBPS, CNRS (UMR 7244), Universit e Sorbonne Paris Nord, Paris, France
| | | | - Abdelkader Boucetta
- Laboratoire CSPBAT, equipe LBPS, CNRS (UMR 7244), Universit e Sorbonne Paris Nord, Paris, France
| | - Reuben Kraft
- Department of Mechanical Engineering, Penn State University, University Park, USA
| | - Juan Jairo Vaca-González
- Escuela de Pregrado - Direccion Académica, Universidad Nacional de Colombia, Sede de La Paz, Cesar, Colombia
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28
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Quexada D, Ramtani S, Trabelsi O, Marquez K, Marie-Christine, Linero Segrera DL, Duque-Daza C, Garzón Alvarado DA. A unified framework of cell population dynamics and mechanical stimulus using a discrete approach in bone remodelling. Comput Methods Biomech Biomed Engin 2023; 26:399-411. [PMID: 35587027 DOI: 10.1080/10255842.2022.2065201] [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: 11/03/2022]
Abstract
Multiphysics models have become a key tool in understanding the way different phenomenon are related in bone remodeling and various approaches have been proposed, yet, to the best of the author's knowledge there is no model able to link a cell population model with a mechanical stimulus model using a discrete approach, which allows for an easy implementation. This article couples two classical models, the cell population model from Komarova and the Nackenhorst model in a 2D domain, where correlations between the mechanical loading and the cell population dynamics can be established, furthermore the effect of different paracrine and autocrine regulators is seen on the overall density of a portion of trabecular bone. A discretization is performed using frame 1D finite elements, representing the trabecular structure. The Nackenhorst model is implemented by using the finite element method to calculate the strain energy as the main mechanical stimulus that determines the bone mass density evolution in time. This density is normalized to be added to the bone mass percentage proposed by the Komarova model, where coupling terms have been added as well that guarantee a stable response. In the simulations, the equations were solved employing the finite element method with a user subroutine implemented in ABAQUS (2017) and by applying a direct formulation. The methodology presented can model the cell dynamics occurring in bone remodelling in accordance with the asynchronous nature of this process, yet allowing to differentiate zones with higher density, the main trabecular groups are obtained for the proximal femur. Finally, the model is tested in pathological cases, such as osteoporosis and osteopetrosis, yielding results similar to the pathology behavior. Furthermore, the discrete modelling technique is shown to be of use in this particular application.
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Affiliation(s)
- Diego Quexada
- Université de technologie de Compiègne, CNRS, Biomechanics and Bioengineering, Centre de Recherche Royallieu, CS 60 319 - 60 203 Compiègne Cedex, France.,Numerical Methods and Modeling Research Group (GNUM), Universidad Nacional de Colombia
| | - Salah Ramtani
- Université Sorbonne Paris Nord, Laboratoire CSPBAT, équipe LBPS, CNRS (UMR 7244), Institut Galilée, F93430, Villetaneuse, France
| | - Olfa Trabelsi
- Université de technologie de Compiègne, CNRS, Biomechanics and Bioengineering, Centre de Recherche Royallieu, CS 60 319 - 60 203 Compiègne Cedex, France
| | | | - Marie-Christine
- Université de technologie de Compiègne, CNRS, Biomechanics and Bioengineering, Centre de Recherche Royallieu, CS 60 319 - 60 203 Compiègne Cedex, France
| | | | - Carlos Duque-Daza
- Numerical Methods and Modeling Research Group (GNUM), Universidad Nacional de Colombia
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29
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Pignolo RJ. Aging and Bone Metabolism. Compr Physiol 2023; 13:4355-4386. [PMID: 36715278 DOI: 10.1002/cphy.c220012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Changes in bone architecture and metabolism with aging increase the likelihood of osteoporosis and fracture. Age-onset osteoporosis is multifactorial, with contributory extrinsic and intrinsic factors including certain medical problems, specific prescription drugs, estrogen loss, secondary hyperparathyroidism, microenvironmental and cellular alterations in bone tissue, and mechanical unloading or immobilization. At the histological level, there are changes in trabecular and cortical bone as well as marrow cellularity, lineage switching of mesenchymal stem cells to an adipogenic fate, inadequate transduction of signals during skeletal loading, and predisposition toward senescent cell accumulation with production of a senescence-associated secretory phenotype. Cumulatively, these changes result in bone remodeling abnormalities that over time cause net bone loss typically seen in older adults. Age-related osteoporosis is a geriatric syndrome due to the multiple etiologies that converge upon the skeleton to produce the ultimate phenotypic changes that manifest as bone fragility. Bone tissue is dynamic but with tendencies toward poor osteoblastic bone formation and relative osteoclastic bone resorption with aging. Interactions with other aging physiologic systems, such as muscle, may also confer detrimental effects on the aging skeleton. Conversely, individuals who maintain their BMD experience a lower risk of fractures, disability, and mortality, suggesting that this phenotype may be a marker of successful aging. © 2023 American Physiological Society. Compr Physiol 13:4355-4386, 2023.
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Affiliation(s)
- Robert J Pignolo
- Department of Medicine, Divisions of Geriatric Medicine and Gerontology, Endocrinology, and Hospital Internal Medicine, Mayo Clinic, Rochester, Minnesota, USA.,The Department of Physiology and Biomedical Engineering, and the Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, Minnesota, USA
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30
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Remmers SJ, van der Heijden FC, Ito K, Hofmann S. The effects of seeding density and osteoclastic supplement concentration on osteoclastic differentiation and resorption. Bone Rep 2022; 18:101651. [PMID: 36588781 PMCID: PMC9800315 DOI: 10.1016/j.bonr.2022.101651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 12/14/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022] Open
Abstract
The bone resorbing osteoclasts are a complex type of cell essential for in vivo bone remodeling. There is no consensus on medium composition and seeding density for in vitro osteoclastogenesis, despite the importance thereof on osteoclastic differentiation and activity. The aim of this study was to investigate the relative effect of monocyte or peripheral blood mononuclear cell (PBMC) seeding density, osteoclastic supplement concentration and priming on the in vitro generation of functional osteoclasts, and to explore and evaluate the usefulness of commonly used markers for osteoclast cultures. Morphology and osteoclast formation were analyzed with fluorescence imaging for tartrate resistant acid phosphatase (TRAP) and integrin β3 (Iβ3). TRAP release was analyzed from supernatant samples, and resorption was analyzed from culture on Corning® Osteo Assay plates. In this study, we have shown that common non-standardized culturing conditions of monocyte or PBMCs had a significant effect on the in vitro generation of functional osteoclasts. We showed how increased osteoclastic supplement concentrations supported osteoclastic differentiation and resorption but not TRAP release, while priming resulted in increased TRAP release as well. Increased monocyte seeding densities resulted in more and large TRAP positive bi-nuclear cells, but not directly in more multinucleated osteoclasts, resorption or TRAP release. Increasing PBMC seeding densities resulted in more and larger osteoclasts and more resorption, although resorption was disproportionally low compared to the monocyte seeding density experiment. Exploration of commonly used markers for osteoclast cultures demonstrated that Iβ3 staining was an excellent and specific osteoclast marker in addition to TRAP staining, while supernatant TRAP measurements could not accurately predict osteoclastic resorptive activity. With improved understanding of the effect of seeding density and osteoclastic supplement concentration on osteoclasts, experiments yielding higher numbers of functional osteoclasts can ultimately improve our knowledge of osteoclasts, osteoclastogenesis, bone remodeling and bone diseases.
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Affiliation(s)
| | | | | | - Sandra Hofmann
- Corresponding author at: Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, the Netherlands.
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Remmers SJ, van der Heijden FC, de Wildt BW, Ito K, Hofmann S. Tuning the resorption-formation balance in an in vitro 3D osteoblast-osteoclast co-culture model of bone. Bone Rep 2022; 18:101646. [PMID: 36578830 PMCID: PMC9791323 DOI: 10.1016/j.bonr.2022.101646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 12/04/2022] [Accepted: 12/09/2022] [Indexed: 12/14/2022] Open
Abstract
The aim of the present study was to further improve an in vitro 3D osteoblast (OB) - osteoclast (OC) co-culture model of bone by tuning it towards states of formation, resorption, and equilibrium for their future applications in fundamental research, drug development and personalized medicine. This was achieved by varying culture medium composition and monocyte seeding density, the two external parameters that affect cell behavior the most. Monocytes were seeded at two seeding densities onto 3D silk-fibroin constructs pre-mineralized by MSC-derived OBs and were co-cultured in one of three different media (OC stimulating, Neutral and OB stimulating medium) for three weeks. Histology showed mineralized matrix after co-culture and OC markers in the OC medium group. Scanning Electron Microscopy showed large OC-like cells in the OC medium group. Micro-computed tomography showed increased formation in the OB medium group, equilibrium in the Neutral medium group and resorption in the OC medium group. Culture supernatant samples showed high early tartrate resistant acid phosphatase (TRAP) release in the OC medium group, a later and lower release in the Neutral medium group, and almost no release in the OB medium group. Increased monocyte seeding density showed a less-than-proportional increase in TRAP release and resorption in OC medium, while it proportionally increased TRAP release in Neutral medium without affecting net resorption. The 3D OB-OC co-culture model was effectively used to show an excess of mineral deposition using OB medium, resorption using OC medium, or an equilibrium using Neutral medium. All three media applied to the model may have their own distinct applications in fundamental research, drug development, and personalized medicine.
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Affiliation(s)
| | | | | | | | - Sandra Hofmann
- Corresponding author at: Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, the Netherlands.
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Surowiec RK, Swallow EA, Warden SJ, Allen MR. Tracking changes of individual cortical pores over 1 year via HR-pQCT in a small cohort of 60-year-old females. Bone Rep 2022; 17:101633. [PMID: 36337684 PMCID: PMC9634666 DOI: 10.1016/j.bonr.2022.101633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Accepted: 10/31/2022] [Indexed: 11/06/2022] Open
Abstract
Introduction High-resolution peripheral quantitative computed tomography (HR-pQCT) is a powerful tool that has revolutionized 3D longitudinal assessment of bone microarchitecture. However, cortical porosity, a common characteristic of cortical bone loss, is still often determined by static evaluation of overall porosity at one timepoint. Therefore, we sought to 1) describe a technique to evaluate individual cortical pore dynamics in aging females over one year using HR-pQCT imaging and 2) determine whether formation and expansion of pores would exceed contraction and infilling of pores. Methods HR-pQCT (60.7 μm resolution) images were acquired one year apart at the distal tibia and distal radius in seven female volunteers (60-72 years of age). Baseline and one-year images were registered at each bone site and a custom software was used to quantify dynamic activity of individual cortical pores using the following categories: developed, infilled, expanded, contracted, and static. Results Over the one-year period, cortical pores actively developed, contracted, expanded, and infilled. More pores expanded and developed vs. infilled or contracted leading to increased pore area in both tibial and radial sites (p = 0.0034 and p = 0.0474, respectively). Closed pores in the tibia, those that were not connected to the endosteal or periosteal surfaces, were the most dynamic of any pores type (open/closed) at either bone site. Conclusion This study demonstrates an approach to longitudinally track individual cortical pore activity in tibial and radial sites. These data expand conventional parameters for assessing cortical porosity and show increased porosity in one year of aging is caused by newly developed pores and expansion of existing pores.
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Affiliation(s)
- Rachel K. Surowiec
- Department of Anatomy, Cell Biology & Physiology, Indiana University School of Medicine, Indianapolis, IN, United States
- Department of Biomedical Engineering, Indiana University–Purdue University Indianapolis, Indianapolis, IN, United States
| | - Elizabeth A. Swallow
- Department of Anatomy, Cell Biology & Physiology, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Stuart J. Warden
- Department of Physical Therapy, School of Health & Human Sciences, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Matthew R. Allen
- Department of Anatomy, Cell Biology & Physiology, Indiana University School of Medicine, Indianapolis, IN, United States
- Roudebush Veterans Administration Medical Center, Indianapolis, IN, United States
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Cook CV, Islam MA, Smith BJ, Versypt ANF. Mathematical modeling of the effects of Wnt-10b on bone metabolism. AIChE J 2022; 68:e17809. [PMID: 36567819 PMCID: PMC9788157 DOI: 10.1002/aic.17809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 06/14/2022] [Indexed: 12/30/2022]
Abstract
Bone health is determined by factors including bone metabolism or remodeling. Wnt-10b alters osteoblastogenesis through pre-osteoblast proliferation and differentiation and osteoblast apoptosis rate, which collectively lead to the increase of bone density. To model this, we adapted a previously published model of bone remodeling. The resulting model for the bone compartment includes differential equations for active osteoclasts, pre-osteoblasts, osteoblasts, osteocytes, and the amount of bone present at the remodeling site. Our alterations to the original model consist of extending it past a single remodeling cycle and implementing a direct relationship to Wnt-10b. Four new parameters were estimated and validated using normalized data from mice. The model connects Wnt-10b to bone metabolism and predicts the change in trabecular bone volume caused by a change in Wnt-10b input. We find that this model predicts the expected increase in pre-osteoblasts and osteoblasts while also pointing to a decrease in osteoclasts when Wnt-10b is increased.
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Affiliation(s)
- Carley V. Cook
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
- School of Chemical Engineering, Oklahoma State University, Stillwater, OK 74078, USA
| | - Mohammad Aminul Islam
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
- School of Chemical Engineering, Oklahoma State University, Stillwater, OK 74078, USA
| | - Brenda J. Smith
- Department of Nutritional Sciences, Oklahoma State University, Stillwater, OK 74078, USA
| | - Ashlee N. Ford Versypt
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
- School of Chemical Engineering, Oklahoma State University, Stillwater, OK 74078, USA
- Institute for Computational and Data Sciences, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
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Sheng MHC, Lau KHW, Rundle CH, Alsunna A, Wilson SM, Baylink DJ. Defective bone repletion in aged Balb/cBy mice was caused by impaired osteoblastic differentiation. J Bone Miner Metab 2022; 40:900-913. [PMID: 35947191 PMCID: PMC9722502 DOI: 10.1007/s00774-022-01361-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 07/13/2022] [Indexed: 12/25/2022]
Abstract
INTRODUCTION This study was undertaken to gain mechanistic information about bone repair using the bone repletion model in aged Balb/cBy mice. MATERIALS AND METHODS one month-old (young) mice were fed a calcium-deficient diet for 2 weeks and 8 month-old (adult) and 21-25 month-old (aged) female mice for 4 weeks during depletion, which was followed by feeding a calcium-sufficient diet for 16 days during repletion. To determine if prolonged repletion would improve bone repair, an additional group of aged mice were repleted for 4 additional weeks. Control mice were fed calcium-sufficient diet throughout. In vivo bone repletion response was assessed by bone mineral density gain and histomorphometry. In vitro response was monitored by osteoblastic proliferation, differentiation, and senescence. RESULTS There was no significant bone repletion in aged mice even with an extended repletion period, indicating an impaired bone repletion. This was not due to an increase in bone cell senescence or reduction in osteoblast proliferation, but to dysfunctional osteoblastic differentiation in aged bone cells. Osteoblasts of aged mice had elevated levels of cytosolic and ER calcium, which were associated with increased Cav1.2 and CaSR (extracellular calcium channels) expression but reduced expression of Orai1 and Stim1, key components of Stored Operated Ca2+ Entry (SOCE). Activation of Cav1.2 and CaSR leads to increased osteoblastic proliferation, but activation of SOCE is associated with osteoblastic differentiation. CONCLUSION The bone repletion mechanism in aged Balb/cBy mice is defective that is caused by an impaired osteoblast differentiation through reducedactivation of SOCE.
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Affiliation(s)
- Matilda H-C Sheng
- Department of Medicine, Loma Linda University School of Medicine, Loma Linda, CA, 92354, USA.
- Musculoskeletal Disease Center (151), Jerry L. Pettis Memorial V.A. Medical Center, 11201 Benton Street, Loma Linda, CA, 92357, USA.
| | - Kin-Hing William Lau
- Department of Medicine, Loma Linda University School of Medicine, Loma Linda, CA, 92354, USA
- Musculoskeletal Disease Center (151), Jerry L. Pettis Memorial V.A. Medical Center, 11201 Benton Street, Loma Linda, CA, 92357, USA
| | - Charles H Rundle
- Department of Medicine, Loma Linda University School of Medicine, Loma Linda, CA, 92354, USA
- Musculoskeletal Disease Center (151), Jerry L. Pettis Memorial V.A. Medical Center, 11201 Benton Street, Loma Linda, CA, 92357, USA
| | - Anar Alsunna
- Department of Medicine, Loma Linda University School of Medicine, Loma Linda, CA, 92354, USA
| | - Sean M Wilson
- Department of Medicine, Loma Linda University School of Medicine, Loma Linda, CA, 92354, USA
| | - David J Baylink
- Department of Medicine, Loma Linda University School of Medicine, Loma Linda, CA, 92354, USA
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Elson A, Anuj A, Barnea-Zohar M, Reuven N. The origins and formation of bone-resorbing osteoclasts. Bone 2022; 164:116538. [PMID: 36028118 DOI: 10.1016/j.bone.2022.116538] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 08/17/2022] [Accepted: 08/18/2022] [Indexed: 02/07/2023]
Abstract
Osteoclasts (OCLs) are hematopoietic cells whose physiological function is to degrade bone. OCLs are key players in the processes that determine and maintain the mass, shape, and physical properties of bone. OCLs adhere to bone tightly and degrade its matrix by secreting protons and proteases onto the underlying surface. The combination of low pH and proteases degrades the mineral and protein components of the matrix and forms a resorption pit; the degraded material is internalized by the cell and then secreted into the circulation. Insufficient or excessive activity of OCLs can lead to significant changes in bone and either cause or exacerbate symptoms of diseases, as in osteoporosis, osteopetrosis, and cancer-induced bone lysis. OCLs are derived from monocyte-macrophage precursor cells whose origins are in two distinct embryonic cell lineages - erythromyeloid progenitor cells of the yolk sac, and hematopoietic stem cells. OCLs are formed in a multi-stage process that is induced by the cytokines M-CSF and RANKL, during which the cells differentiate, fuse to form multi-nucleated cells, and then differentiate further to become mature, bone-resorbing OCLs. Recent studies indicate that OCLs can undergo fission in vivo to generate smaller cells, called "osteomorphs", that can be "re-cycled" by fusing with other cells to form new OCLs. In this review we describe OCLs and discuss their cellular origins and the cellular and molecular events that drive osteoclastogenesis.
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Affiliation(s)
- Ari Elson
- Department of Molecular Genetics, The Weizmann Institute of Science, Rehovot 76100, Israel.
| | - Anuj Anuj
- Department of Molecular Genetics, The Weizmann Institute of Science, Rehovot 76100, Israel
| | - Maayan Barnea-Zohar
- Department of Molecular Genetics, The Weizmann Institute of Science, Rehovot 76100, Israel
| | - Nina Reuven
- Department of Molecular Genetics, The Weizmann Institute of Science, Rehovot 76100, Israel
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Expansion of the osteocytic lacunar-canalicular system involved in pharmacological action of PTH revealed by AI-driven fluorescence morphometry in female rabbits. Sci Rep 2022; 12:16799. [PMID: 36207444 PMCID: PMC9546928 DOI: 10.1038/s41598-022-20793-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 09/19/2022] [Indexed: 11/18/2022] Open
Abstract
Osteoporosis is an age-related disorder that is characterized by reduced bone mass. Its prevention and treatment are important healthcare issues for maintaining social activity in aged societies. Although bone fractures mostly occur at sites of weakened cortical bone, pathophysiological and pharmacological evaluations of bone mass have tended to be predominantly assessed in trabecular bone. To statistically characterize cortical bone remodeling, we originally established multimode fluorescence imaging and artificial intelligence (AI)-driven morphometric analyses in six-month-old female rabbits with well-defined cortical remodeling, similar to that in humans. We evaluated three distinct administration frequencies of teriparatide [TPTD; human parathyroid hormone, hPTH (1–34)]: once (1/w), twice (2/w), and seven times (7/w) a week, with the same total dose (140 μg/kg/week). Our analyses revealed significant expansions of the osteocytic lacunar-canalicular system and Haversian canals accompanied by the development of cortical porosity and endosteal naïve bone formation induced by a frequent administration regimen (7/w) of TPTD; however, once-weekly (1/w) and twice-weekly (2/w) administration of TPTD showed little effect. These findings demonstrate a clear contrast between the effects of frequent and infrequent administration of TPTD on cortical bone metabolism and suggest that osteocytic bone remodeling is involved in the pharmacological action of PTH.
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Sharma N, Weivoda MM, Søe K. Functional Heterogeneity Within Osteoclast Populations-a Critical Review of Four Key Publications that May Change the Paradigm of Osteoclasts. Curr Osteoporos Rep 2022; 20:344-355. [PMID: 35838878 DOI: 10.1007/s11914-022-00738-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/26/2022] [Indexed: 11/03/2022]
Abstract
PURPOSE OF REVIEW In this review, we critically evaluate the literature for osteoclast heterogeneity, including heterogeneity in osteoclast behavior, which has hitherto been unstudied and has only recently come to attention. We give a critical review centered on four recent high-impact papers on this topic and aim to shed light on the elusive biology of osteoclasts and focus on the variant features of osteoclasts that diverge from the classical viewpoint. RECENT FINDINGS Osteoclasts originate from the myeloid lineage and are best known for their unique ability to resorb bone. For decades, osteoclasts have been defined simply as multinucleated cells positive for tartrate-resistant acid phosphatase activity and quantified relative to the bone perimeter or surface in histomorphometric analyses. However, several recent, high-profile studies have demonstrated the existence of heterogeneous osteoclast populations, with variable origins and functions depending on the microenvironment. This includes long-term persisting osteoclasts, inflammatory osteoclasts, recycling osteoclasts (osteomorphs), and bone resorption modes. Most of these findings have been revealed through murine studies and have helped identify new targets for human studies. These studies have also uncovered distinct sets of behavioral patterns in heterogeneous osteoclast cultures. The underlying osteoclast heterogeneity likely drives differences in bone remodeling, altering patient risk for osteoporosis and fracture. Thus, identifying the underlying key features of osteoclast heterogeneity may help in better targeting bone diseases.
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Affiliation(s)
- Neha Sharma
- Clinical Cell Biology, Department of Pathology, Odense University Hospital, Odense, Denmark
- Pathology Research Unit, Department of Clinical Research, University of Southern Denmark, Odense, Denmark
- Department of Molecular Medicine, University of Southern Denmark, J. B. Winsløws Vej 25, 1. Floor, 5000, Odense C, Denmark
| | | | - Kent Søe
- Clinical Cell Biology, Department of Pathology, Odense University Hospital, Odense, Denmark.
- Pathology Research Unit, Department of Clinical Research, University of Southern Denmark, Odense, Denmark.
- Department of Molecular Medicine, University of Southern Denmark, J. B. Winsløws Vej 25, 1. Floor, 5000, Odense C, Denmark.
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Doube M. Closing cones create conical lamellae in secondary osteonal bone. ROYAL SOCIETY OPEN SCIENCE 2022; 9:220712. [PMID: 35958092 PMCID: PMC9363998 DOI: 10.1098/rsos.220712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
Lamellae are sheets of mineralized collagen 1-20 µm thick, extending over hundreds of µm in bone tissue, occupying bone's structural hierarchy at a level above collagen fibres and osteocytes, and below osteons and trabeculae. Osteons are tubular arrangements of lamellae surrounding central neurovascular canals. Lamellae in osteons are usually described as concentric cylinders based on their annular appearance in transverse section. In this review, I provide a perspective on current understanding of the relationship between geometry of the bone formation front and the shape of lamellae produced at it, reaching the conclusion that the 'closing cone' bone formation front in secondary osteonal remodelling must necessarily result in cone-shaped lamellae in the mature secondary osteon. Secondary osteons replace primary osteons through a tunnelling process of bone turnover, meaning that conical lamellae may become more common in older and damaged bone which is at greatest risk of fracture. Visualization and measurement of three-dimensional lamellar shape over hundreds of microns is needed to provide data for accurate micromechanical simulations. Treating secondary osteonal lamellae as a 'stack of cones' rather than 'nested cylinders' may have important implications for our appreciation of bone's function as a load-bearing tissue and of its behaviour in fracture.
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Affiliation(s)
- Michael Doube
- Department of Infectious Diseases and Public Health, City University of Hong Kong, Kowloon, Hong Kong
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Young SAE, Rummler M, Taïeb HM, Garske DS, Ellinghaus A, Duda GN, Willie BM, Cipitria A. In vivo microCT-based time-lapse morphometry reveals anatomical site-specific differences in bone (re)modeling serving as baseline parameters to detect early pathological events. Bone 2022; 161:116432. [PMID: 35569733 DOI: 10.1016/j.bone.2022.116432] [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: 02/03/2022] [Revised: 05/09/2022] [Accepted: 05/09/2022] [Indexed: 11/19/2022]
Abstract
The bone structure is very dynamic and continuously adapts its geometry to external stimuli by modeling and remodeling the mineralized tissue. In vivo microCT-based time-lapse morphometry is a powerful tool to study the temporal and spatial dynamics of bone (re)modeling. Here an advancement in the methodology to detect and quantify site-specific differences in bone (re)modeling of 12-week-old BALB/c nude mice is presented. We describe our method of quantifying new bone surface interface readouts and how these are influenced by bone curvature. This method is then used to compare bone surface (re)modeling in mice across different anatomical regions to demonstrate variations in the rate of change and spatial gradients thereof. Significant differences in bone (re)modeling baseline parameters between the metaphyseal and epiphyseal, as well as cortical and trabecular bone of the distal femur and proximal tibia are shown. These results are validated using conventional static in vivo microCT analysis. Finally, the insights from these new baseline values of physiological bone (re)modeling were used to evaluate pathological bone (re)modeling in a pilot breast cancer bone metastasis model. The method shows the potential to be suitable to detect early pathological events and track their spatio-temporal development in both cortical and trabecular bone. This advancement in (re)modeling surface analysis and defined baseline parameters according to distinct anatomical regions will be valuable to others investigating various disease models with site-distinct local alterations in bone (re)modeling.
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Affiliation(s)
- Sarah A E Young
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Potsdam, Germany
| | - Maximilian Rummler
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Potsdam, Germany; Research Centre, Shriners Hospital for Children-Canada, Montreal, Canada; Department of Pediatric Surgery, McGill University, Montreal, Canada
| | - Hubert M Taïeb
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Potsdam, Germany
| | - Daniela S Garske
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Potsdam, Germany
| | - Agnes Ellinghaus
- Julius Wolff Institute & Berlin Institute of Health Center for Regenerative Therapies, Berlin Institute of Health and Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Georg N Duda
- Julius Wolff Institute & Berlin Institute of Health Center for Regenerative Therapies, Berlin Institute of Health and Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Bettina M Willie
- Research Centre, Shriners Hospital for Children-Canada, Montreal, Canada; Department of Pediatric Surgery, McGill University, Montreal, Canada
| | - Amaia Cipitria
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Potsdam, Germany; Biodonostia Health Research Institute, Group of Bioengineering in Regeneration and Cancer, San Sebastian, Spain; IKERBASQUE, Basque Foundation for Science, Bilbao, Spain.
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Bolamperti S, Villa I, Rubinacci A. Bone remodeling: an operational process ensuring survival and bone mechanical competence. Bone Res 2022; 10:48. [PMID: 35851054 PMCID: PMC9293977 DOI: 10.1038/s41413-022-00219-8] [Citation(s) in RCA: 85] [Impact Index Per Article: 42.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 05/02/2022] [Accepted: 05/15/2022] [Indexed: 12/12/2022] Open
Abstract
Bone remodeling replaces old and damaged bone with new bone through a sequence of cellular events occurring on the same surface without any change in bone shape. It was initially thought that the basic multicellular unit (BMU) responsible for bone remodeling consists of osteoclasts and osteoblasts functioning through a hierarchical sequence of events organized into distinct stages. However, recent discoveries have indicated that all bone cells participate in BMU formation by interacting both simultaneously and at different differentiation stages with their progenitors, other cells, and bone matrix constituents. Therefore, bone remodeling is currently considered a physiological outcome of continuous cellular operational processes optimized to confer a survival advantage. Bone remodeling defines the primary activities that BMUs need to perform to renew successfully bone structural units. Hence, this review summarizes the current understanding of bone remodeling and future research directions with the aim of providing a clinically relevant biological background with which to identify targets for therapeutic strategies in osteoporosis.
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Affiliation(s)
- Simona Bolamperti
- Osteoporosis and Bone and Mineral Metabolism Unit, IRCCS San Raffaele Hospital, Via Olgettina 60, 20132, Milano, Italy
| | - Isabella Villa
- Osteoporosis and Bone and Mineral Metabolism Unit, IRCCS San Raffaele Hospital, Via Olgettina 60, 20132, Milano, Italy
| | - Alessandro Rubinacci
- Osteoporosis and Bone and Mineral Metabolism Unit, IRCCS San Raffaele Hospital, Via Olgettina 60, 20132, Milano, Italy.
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Ledoux C, Boaretti D, Sachan A, Müller R, Collins CJ. Clinical Data for Parametrization of In Silico Bone Models Incorporating Cell-Cytokine Dynamics: A Systematic Review of Literature. Front Bioeng Biotechnol 2022; 10:901720. [PMID: 35910035 PMCID: PMC9335409 DOI: 10.3389/fbioe.2022.901720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 06/13/2022] [Indexed: 11/13/2022] Open
Abstract
In silico simulations aim to provide fast, inexpensive, and ethical alternatives to years of costly experimentation on animals and humans for studying bone remodeling, its deregulation during osteoporosis and the effect of therapeutics. Within the varied spectrum of in silico modeling techniques, bone cell population dynamics and agent-based multiphysics simulations have recently emerged as useful tools to simulate the effect of specific signaling pathways. In these models, parameters for cell and cytokine behavior are set based on experimental values found in literature; however, their use is currently limited by the lack of clinical in vivo data on cell numbers and their behavior as well as cytokine concentrations, diffusion, decay and reaction rates. Further, the settings used for these parameters vary across research groups, prohibiting effective cross-comparisons. This review summarizes and evaluates the clinical trial literature that can serve as input or validation for in silico models of bone remodeling incorporating cells and cytokine dynamics in post-menopausal women in treatment, and control scenarios. The GRADE system was used to determine the level of confidence in the reported data, and areas lacking in reported measures such as binding site occupancy, reaction rates and cell proliferation, differentiation and apoptosis rates were highlighted as targets for further research. We propose a consensus for the range of values that can be used for the cell and cytokine settings related to the RANKL-RANK-OPG, TGF-β and sclerostin pathways and a Levels of Evidence-based method to estimate parameters missing from clinical trial literature.
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Affiliation(s)
- Charles Ledoux
- Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | | | - Akanksha Sachan
- Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai, India
| | - Ralph Müller
- Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | - Caitlyn J. Collins
- Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
- Department for Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, VI,United States
- *Correspondence: Caitlyn J. Collins,
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Borggaard XG, Roux JP, Delaisse JM, Chavassieux P, Andreasen CM, Andersen TL. Alendronate prolongs the reversal-resorption phase in human cortical bone remodeling. Bone 2022; 160:116419. [PMID: 35413490 DOI: 10.1016/j.bone.2022.116419] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 04/02/2022] [Accepted: 04/07/2022] [Indexed: 01/18/2023]
Abstract
Despite their ability to reduce fracture-risk and increase Bone Mineral Density (BMD) in osteoporotic women, bisphosphonates are reported to reduce formation of new bone. Reduced bone formation has been suggested to lead to accumulation of microfractures and contribute to rare side effects in cortical bone such as atypical femur fractures. However, most studies are limited to trabecular bone. In this study, the cortical bone remodeling in human iliac bone specimens of 65 non-treated and 24 alendronate-treated osteoporotic women was investigated using a new histomorphometric classification of intracortical pores. The study showed that only 12.4 ± 11% of the cortical pore area reflected quiescent pores/osteons in alendronate-treated patients versus 8.5 ± 5% in placebo, highlighting that new cortical remodeling events remain to be activated. The percent and size of eroded pores (events in resorption-reversal phase) remained unchanged, but their contribution to total pore area was 1.4-fold higher in alendronate versus placebo treated patients (66 ± 22% vs 48 ± 22%, p < 0.001). On the other hand, the mixed eroded-formative pores (events with mixed resorption-reversal-formation phases) was 2-fold lower in alendronate versus placebo treated patients (19 ± 14% vs 39 ± 23% of total pore area, p < 0.001), and formative pores (event in formation phase) was 2.2-fold lower in alendronate versus placebo treated patients (2.1 ± 2.4% vs 4.6 ± 3.6%, p < 0.01), and their contribution to total pore area was 2.4-fold lower (1.3 ± 2.1% vs 3.1 ± 4.4%, p < 0.05). Importantly, these differences between alendronate and placebo treated patients were significant in patients after 3 years of treatment, not after 2 years of treatment. Collectively, the results support that cortical remodeling events activated during alendronate treatment has a prolonged reversal-resorption phase with a delayed transition to formation, becoming increasingly evident after 3-years of treatment. A potential contributor to atypical femur fractures associated with long-term bisphosphonate treatment.
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Affiliation(s)
- Xenia G Borggaard
- Molecular Bone Histology Team, Clinical Cell Biology, Research Unit of Pathology, Dept. of Clinical Research and Dept. of Molecular Medicine, University of Southern Denmark, Odense, Denmark; Dept. of Pathology, Odense University Hospital, Odense, Denmark.
| | | | - Jean-Marie Delaisse
- Molecular Bone Histology Team, Clinical Cell Biology, Research Unit of Pathology, Dept. of Clinical Research and Dept. of Molecular Medicine, University of Southern Denmark, Odense, Denmark; Dept. of Pathology, Odense University Hospital, Odense, Denmark
| | | | - Christina M Andreasen
- Molecular Bone Histology Team, Clinical Cell Biology, Research Unit of Pathology, Dept. of Clinical Research and Dept. of Molecular Medicine, University of Southern Denmark, Odense, Denmark; Dept. of Pathology, Odense University Hospital, Odense, Denmark
| | - Thomas L Andersen
- Molecular Bone Histology Team, Clinical Cell Biology, Research Unit of Pathology, Dept. of Clinical Research and Dept. of Molecular Medicine, University of Southern Denmark, Odense, Denmark; Dept. of Pathology, Odense University Hospital, Odense, Denmark; Dept. of Forensic Medicine, Aarhus University, Aarhus, Denmark.
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Warner AJ, Hathaway-Schrader JD, Lubker R, Davies C, Novince CM. Tetracyclines and bone: Unclear actions with potentially lasting effects. Bone 2022; 159:116377. [PMID: 35248788 PMCID: PMC9035080 DOI: 10.1016/j.bone.2022.116377] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 02/11/2022] [Accepted: 02/28/2022] [Indexed: 01/11/2023]
Abstract
Tetracyclines are a broad-spectrum class of antibiotics that have unclear actions with potentially lasting effects on bone metabolism. Initially isolated from Streptomyces, tetracycline proved to be an effective treatment for Gram +/- infections. The emergence of resistant bacterial strains commanded the development of later generation agents, including minocycline, doxycycline, tigecycline, sarecycline, omadacycline, and eravacycline. In 1957, it was realized that tetracyclines act as bone fluorochrome labels due to their high affinity for the bone mineral matrix. Over the course of the next decade, researchers discerned that these compounds are retained in the bone matrix at high levels after the termination of antibiotic therapy. Studies during this period provided evidence that tetracyclines could disrupt prenatal and early postnatal skeletal development. Currently, tetracyclines are most commonly prescribed as a long-term systemic therapy for the treatment of acne in healthy adolescents and young adults. Surprisingly, the impact of tetracyclines on physiologic bone modeling/remodeling is largely unknown. This article provides an overview of the pharmacology of tetracycline drugs, summarizes current knowledge about the impact of these agents on skeletal development and homeostasis, and reviews prior work targeting tetracyclines' effects on bone cell physiology. The need for future research to elucidate unclear effects of tetracyclines on the skeleton is addressed, including drug retention/release mechanisms from the bone matrix, signaling mechanisms at bone cells, the impact of newer third generation tetracycline antibiotics, and the role of the gut-bone axis.
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Affiliation(s)
- Amy J Warner
- Department of Oral Health Sciences, College of Dental Medicine, Medical University of South Carolina, Charleston, SC 29425, USA; Department of Stomatology-Division of Periodontics, College of Dental Medicine, Medical University of South Carolina, Charleston, SC 29425, USA; Department of Pediatrics-Division of Endocrinology, College of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA.
| | - Jessica D Hathaway-Schrader
- Department of Oral Health Sciences, College of Dental Medicine, Medical University of South Carolina, Charleston, SC 29425, USA; Department of Stomatology-Division of Periodontics, College of Dental Medicine, Medical University of South Carolina, Charleston, SC 29425, USA; Department of Pediatrics-Division of Endocrinology, College of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA.
| | - Rena Lubker
- Medical University of South Carolina Libraries, Medical University of South Carolina, Charleston, SC 29425, USA; Department of Stomatology-Division of Population Oral Health, College of Dental Medicine, Medical University of South Carolina, Charleston, SC 29425, USA.
| | - Christopher Davies
- Department of Oral Health Sciences, College of Dental Medicine, Medical University of South Carolina, Charleston, SC 29425, USA; Department of Biochemistry & Molecular Biology, College of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA.
| | - Chad M Novince
- Department of Oral Health Sciences, College of Dental Medicine, Medical University of South Carolina, Charleston, SC 29425, USA; Department of Stomatology-Division of Periodontics, College of Dental Medicine, Medical University of South Carolina, Charleston, SC 29425, USA; Department of Pediatrics-Division of Endocrinology, College of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA.
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Malek G, Richard H, Beauchamp G, Laverty S. An in vitro model for discovery of osteoclast specific biomarkers towards identification of racehorses at risk for catastrophic fractures. Equine Vet J 2022; 55:534-550. [PMID: 35616632 DOI: 10.1111/evj.13600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 05/12/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND Focal bone microcracks with osteoclast recruitment and bone lysis, may reduce fracture resistance in racehorses. As current imaging does not detect all horses at risk for fracture, the discovery of novel serum biomarkers of bone resorption or osteoclast activity could potentially address this unmet clinical need. The biology of equine osteoclasts on their natural substrate, equine bone, has never been studied in vitro and may permit identification of specific biomarkers of their activity. OBJECTIVES 1) Establish osteoclast cultures on equine bone, 2) Measure biomarkers (tartrate resistant acid phosphatase isoform 5b (TRACP-5b) and C-terminal telopeptide of type I collagen (CTX-I)) in vitro and 3) Study the effects of inflammation. STUDY DESIGN In vitro experiments. METHODS Haematopoietic stem cells, from 5 equine sternal bone marrow aspirates, were differentiated into osteoclasts and cultured either alone or on equine bone slices, with or without pro-inflammatory stimulus (IL-1β or LPS). CTX-I and TRACP-5b were immunoassayed in the media. Osteoclast numbers and bone resorption area were assessed. RESULTS TRACP-5b increased over time without bone (p < 0.0001) and correlated with osteoclast number (r = 0.63, p < 0.001). CTX-I and TRACP-5b increased with time for cultures with bone (p = 0.002; p = 0.02 respectively), correlated with each other (r = 0.64, p < 0.002) and correlated with bone resorption (r = 0.85, p < 0.001; r = 0.82, p < 0.001 respectively). Inflammation had no measurable effects. MAIN LIMITATIONS Specimen numbers limited. CONCLUSIONS Equine osteoclasts were successfully cultured on equine bone slices and their bone resorption quantified. TRACP-5b was shown to be a biomarker of equine osteoclast number and bone resorption for the first time; CTX-I was also confirmed to be a biomarker of equine bone resorption in vitro. This robust equine specific in vitro assay will help the study of osteoclast biology.
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Affiliation(s)
- Gwladys Malek
- Comparative Orthopaedic Research Laboratory, Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Montreal, 3200 Sicotte, St-Hyacinthe, QC, Canada
| | - Hélène Richard
- Comparative Orthopaedic Research Laboratory, Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Montreal, 3200 Sicotte, St-Hyacinthe, QC, Canada
| | - Guy Beauchamp
- Comparative Orthopaedic Research Laboratory, Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Montreal, 3200 Sicotte, St-Hyacinthe, QC, Canada
| | - Sheila Laverty
- Comparative Orthopaedic Research Laboratory, Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Montreal, 3200 Sicotte, St-Hyacinthe, QC, Canada
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Mehlhorn AT, Illgner U, Lemperle S, Huber V, Hoerterer H, Gottschalk O, Legrand MA, Krenn V, Walther M. [Does inflammatory activity of Charcot foot affect successful corrective arthrodesis?]. DER ORTHOPADE 2022; 51:499-506. [PMID: 35476118 DOI: 10.1007/s00132-022-04251-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/14/2022] [Indexed: 11/26/2022]
Abstract
BACKGROUND Neuro-osteoarthropathy of the foot (CN) is divided into an active and inactive stage, with impact on the further treatment. The histopathological Charcot score (HCS) can be used, to grade the inflammatory activity in tissue samples. RESEARCH QUESTION This study aims to clarify whether successful bony healing after arthrodesis is related to inflammatory activity of the disease. MATERIAL AND METHOD N = 80 patients underwent corrective arthrodesis of the midfoot (group 1) or hindfoot/ankle (group 2). A distinction was made between patients with/without diabetes mellitus and with/without pain perception. Intraoperative samples were taken to determine HCS. The osseous healing of the arthrodesis was determined by computed tomography 12 weeks postoperatively. RESULTS There was an indirect correlation between bony consolidation and HCS. In group 2, there was a significantly worse bony healing in patients without pain sensation. There seems to be a tendency for HCS to be increased in patients without diabetes/no pain sensation. DISCUSSION The present study confirms the assumption that corrective arthrodesis should be performed in the inactive stage of CN only. High activity levels obviously impede bony healing. HCS represents a relevant prognostic tool for surgical treatment.
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Affiliation(s)
- Alexander T Mehlhorn
- Zentrum für Fuß- und Sprunggelenkschirurgie, Schönklinik München-Harlaching, München, Deutschland.
- Klinik für Orthopädie und Unfallchirurgie, Albert-Ludwigs-Universität Freiburg, Freiburg, Deutschland.
- Sektion für Diabetische und Neuropathische Fußerkrankungen, Zentrum für Fuß- und Sprunggelenkschirurgie, Schönklinik München-Harlaching, Harlachinger Straße 51, 81547, München, Deutschland.
| | - Ulrich Illgner
- Orthopädische Privatpraxis Seintsch Illgner, Koblenz, Deutschland
| | - Stefan Lemperle
- Zentrum für Fuß- und Sprunggelenkschirurgie, Schönklinik München-Harlaching, München, Deutschland
| | - Verena Huber
- Zentrum für Fuß- und Sprunggelenkschirurgie, Schönklinik München-Harlaching, München, Deutschland
| | - Hubert Hoerterer
- Zentrum für Fuß- und Sprunggelenkschirurgie, Schönklinik München-Harlaching, München, Deutschland
- Klinik für Allgemeine, Unfall- und Wiederherstellungschirurgie, Universitätsklinikum der LMU München, München, Deutschland
| | - Oliver Gottschalk
- Zentrum für Fuß- und Sprunggelenkschirurgie, Schönklinik München-Harlaching, München, Deutschland
- Klinik für Allgemeine, Unfall- und Wiederherstellungschirurgie, Universitätsklinikum der LMU München, München, Deutschland
| | - Maria Anna Legrand
- Zentrum für Anästhesiologie und Intensivmedizin, Schönklinik München-Harlaching, München, Deutschland
| | - Veit Krenn
- MVZ-Zentrum für Histologie, Zytologie und Molekulare Diagnostik GmbH, Trier, Deutschland
| | - Markus Walther
- Zentrum für Fuß- und Sprunggelenkschirurgie, Schönklinik München-Harlaching, München, Deutschland
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46
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Yazdanpanah Z, Johnston JD, Cooper DML, Chen X. 3D Bioprinted Scaffolds for Bone Tissue Engineering: State-Of-The-Art and Emerging Technologies. Front Bioeng Biotechnol 2022; 10:824156. [PMID: 35480972 PMCID: PMC9035802 DOI: 10.3389/fbioe.2022.824156] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 03/03/2022] [Indexed: 12/12/2022] Open
Abstract
Treating large bone defects, known as critical-sized defects (CSDs), is challenging because they are not spontaneously healed by the patient’s body. Due to the limitations associated with conventional bone grafts, bone tissue engineering (BTE), based on three-dimensional (3D) bioprinted scaffolds, has emerged as a promising approach for bone reconstitution and treatment. Bioprinting technology allows for incorporation of living cells and/or growth factors into scaffolds aiming to mimic the structure and properties of the native bone. To date, a wide range of biomaterials (either natural or synthetic polymers), as well as various cells and growth factors, have been explored for use in scaffold bioprinting. However, a key challenge that remains is the fabrication of scaffolds that meet structure, mechanical, and osteoconductive requirements of native bone and support vascularization. In this review, we briefly present the latest developments and discoveries of CSD treatment by means of bioprinted scaffolds, with a focus on the biomaterials, cells, and growth factors for formulating bioinks and their bioprinting techniques. Promising state-of-the-art pathways or strategies recently developed for bioprinting bone scaffolds are highlighted, including the incorporation of bioactive ceramics to create composite scaffolds, the use of advanced bioprinting technologies (e.g., core/shell bioprinting) to form hybrid scaffolds or systems, as well as the rigorous design of scaffolds by taking into account of the influence of such parameters as scaffold pore geometry and porosity. We also review in-vitro assays and in-vivo models to track bone regeneration, followed by a discussion of current limitations associated with 3D bioprinting technologies for BTE. We conclude this review with emerging approaches in this field, including the development of gradient scaffolds, four-dimensional (4D) printing technology via smart materials, organoids, and cell aggregates/spheroids along with future avenues for related BTE.
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Affiliation(s)
- Zahra Yazdanpanah
- Division of Biomedical Engineering, College of Engineering, University of Saskatchewan, Saskatoon, SK, Canada
- *Correspondence: Zahra Yazdanpanah,
| | - James D. Johnston
- Division of Biomedical Engineering, College of Engineering, University of Saskatchewan, Saskatoon, SK, Canada
- Department of Mechanical Engineering, College of Engineering, University of Saskatchewan, Saskatoon, SK, Canada
| | - David M. L. Cooper
- Department of Anatomy Physiology and Pharmacology, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada
| | - Xiongbiao Chen
- Division of Biomedical Engineering, College of Engineering, University of Saskatchewan, Saskatoon, SK, Canada
- Department of Mechanical Engineering, College of Engineering, University of Saskatchewan, Saskatoon, SK, Canada
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47
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Esposito L, Minutolo V, Gargiulo P, Fraldi M. Symmetry breaking and effects of nutrient walkway in time-dependent bone remodeling incorporating poroelasticity. Biomech Model Mechanobiol 2022; 21:999-1020. [PMID: 35394267 PMCID: PMC9132879 DOI: 10.1007/s10237-022-01573-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 03/07/2022] [Indexed: 12/03/2022]
Abstract
Bone is an extraordinary biological material that continuously adapts its hierarchical microstructure to respond to static and dynamic loads for offering optimal mechanical features, in terms of stiffness and toughness, across different scales, from the sub-microscopic constituents within osteons—where the cyclic activity of osteoblasts, osteoclasts, and osteocytes redesigns shape and percentage of mineral crystals and collagen fibers—up to the macroscopic level, with growth and remodeling processes that modify the architecture of both compact and porous bone districts. Despite the intrinsic complexity of the bone mechanobiology, involving coupling phenomena of micro-damage, nutrients supply driven by fluid flowing throughout hierarchical networks, and cells turnover, successful models and numerical algorithms have been presented in the literature to predict, at the macroscale, how bone remodels under mechanical stimuli, a fundamental issue in many medical applications such as optimization of femur prostheses and diagnosis of the risk fracture. Within this framework, one of the most classical strategies employed in the studies is the so-called Stanford’s law, which allows uploading the effect of the time-dependent load-induced stress stimulus into a biomechanical model to guess the bone structure evolution. In the present work, we generalize this approach by introducing the bone poroelasticity, thus incorporating in the model the role of the fluid content that, by driving nutrients and contributing to the removal of wastes of bone tissue cells, synergistically interacts with the classical stress fields to change homeostasis states, local saturation conditions, and reorients the bone density rate, in this way affecting growth and remodeling. Through two paradigmatic example applications, i.e. a cylindrical slice with internal prescribed displacements idealizing a tract of femoral diaphysis pushed out by the pressure exerted by a femur prosthesis and a bone element in a form of a bent beam, it is highlighted that the present model is capable to catch more realistically both the transition between spongy and cortical regions and the expected non-symmetrical evolution of bone tissue density in the medium–long term, unpredictable with the standard approach. A real study case of a femur is also considered at the end in order to show the effectiveness of the proposed remodeling algorithm.
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Affiliation(s)
- L Esposito
- Department Engineering, University of Campania "Luigi Vanvitelli", Aversa, Italy
| | - V Minutolo
- Department Engineering, University of Campania "Luigi Vanvitelli", Aversa, Italy
| | - P Gargiulo
- Institute for Biomedical and Neural Engineering, Reykjavík University, Reykjavík, Iceland
- Department of Science, Landspítali Hospital, Reykjavík, Iceland
| | - M Fraldi
- Department of Structures for Engineering and Architecture, University of Napoli "Federico II", Napoli, Italy.
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Suehiro D, Moriwaki Y, Fukami K, Abe‐Dohmae S, Ohnishi M. The effect of maltobionic acid on bone metabolism markers in healthy Japanese postmenopausal women: A randomized double‐blind placebo‐controlled crossover study. Food Sci Nutr 2022; 10:2496-2504. [PMID: 35959256 PMCID: PMC9361434 DOI: 10.1002/fsn3.2855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 03/05/2022] [Accepted: 03/17/2022] [Indexed: 11/07/2022] Open
Affiliation(s)
| | - Yuichiro Moriwaki
- Graduate School of Bioscience and Biotechnology Chubu University Aichi Japan
| | - Ken Fukami
- San‐ei Sucrochemical Co., Ltd. Aichi Japan
| | - Sumiko Abe‐Dohmae
- Graduate School of Bioscience and Biotechnology Chubu University Aichi Japan
- College of Bioscience and Biotechnology Chubu University Aichi Japan
| | - Motoko Ohnishi
- Graduate School of Bioscience and Biotechnology Chubu University Aichi Japan
- College of Bioscience and Biotechnology Chubu University Aichi Japan
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Fluoride Coatings on Magnesium Alloy Implants. Bioinorg Chem Appl 2022; 2022:7636482. [PMID: 35295762 PMCID: PMC8920665 DOI: 10.1155/2022/7636482] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/24/2022] [Accepted: 02/12/2022] [Indexed: 11/18/2022] Open
Abstract
After several years of research and development, it has been reported that magnesium alloys can be used as degradable metals in some medical device applications. Over the years, fluoride coatings have received increasing research attention for improving the corrosion resistance of magnesium. In this paper, different methods for preparing fluoride coatings and the characteristics of these coatings are reported for the first time. The influence of the preparation conditions of fluoride coatings, including the magnesium substrate, voltage, and electrolyte, on the coatings is discussed. Various properties of magnesium fluoride coatings are also summarized, with an emphasis on corrosion resistance, mechanical properties, and biocompatibility. We screened experiments and papers that planned the application of magnesium fluoride coatings in living organisms. We have selected the literature with the aim of enhancing the performance of in vivo implants for reading and further detailed classification. The authors searched PubMed, SCOPUS, Web of Science, and other databases for 688 relevant papers published between 2005 and 2021, citing 105 of them. The selected time range is the last 16 years. Furthermore, this paper systematically discusses future prospects and challenges related to the application of magnesium fluoride coatings to medical products.
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50
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Yang W, He Q, Hu Z, Xie X. FOXO4 May Be a Biomarker of Postmenopausal Osteoporosis. Int J Gen Med 2022; 15:749-762. [PMID: 35082523 PMCID: PMC8786351 DOI: 10.2147/ijgm.s347416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 01/06/2022] [Indexed: 11/23/2022] Open
Abstract
Purpose Postmenopausal osteoporosis (PMOP) is a common and debilitating chronic disease, but it has just no cure options. The objective of this study was to identify genes associated with osteoporosis and reveal potential therapeutic targets. Methods Expression profiles from GSE13850 and GSE56815 datasets were combined for differential expression analysis. Extraction of intersecting genes from the combined datasets and the differentially expressed genes in GSE56814 were performed to construct a multi-scale embedded gene co-expression network analysis (MEGENA) to obtain module genes. Module genes with an area under the receiver operating characteristic curve (AUC) >0.60 were chosen to construct the least absolute shrinkage and selection operator (LASSO) model to obtain feature genes. A regulated network was constructed using differentially expressed micro-RNAs (miRNAs) in GSE74209 and feature genes. Finally, key genetic pathways and pathways of the Kyoto Encyclopedia of Genes and Genomes were identified and explored. Results The commonly identified differentially expressed genes involve oxidative phosphorylation and caffeine metabolism. We identified 66 modules with 2354 module genes based on MEGENA. CARD8, FOXO4, IL1R2, MPHOSPH6, MPRIP, MYOM1, PRR5L and YIPF4 were identified as feature genes by the LASSO model. Furthermore, predicted miRNA target genes included 8 genes associated with PMOP. The largest AUC was observed for FOXO4, which was found at the nexus of feature genes and miRNA-regulated genes and which correlated with the upregulation of dendritic cells. Moreover, FOXO4 was found to be involved in ABC transporters, as well as cocaine and nicotine addiction. Conclusion FOXO4 may serve as potential biomarker and therapeutic target for PMOP.
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Affiliation(s)
- Weiwei Yang
- Department of Gynecology, The Fourth Affiliated Hospital of Guangxi Medical University, Liuzhou, Guangxi, 545005, People’s Republic of China
| | - Qing He
- Department of Orthopedics, The Fourth Affiliated Hospital of Guangxi Medical University, Liuzhou, Guangxi, 545005, People’s Republic of China
| | - Zhaohui Hu
- Department of Orthopedics, Liuzhou People’s Hospital, Liuzhou, Guangxi, 545005, People’s Republic of China
- Correspondence: Zhaohui Hu, Liuzhou People’s Hospital, No. 8 Wenchang Road, Liuzhou, Guangxi, 545006, People’s Republic of China, Tel/Fax +867722662676, Email
| | - Xiangtao Xie
- Department of Orthopedics, The Fourth Affiliated Hospital of Guangxi Medical University, Liuzhou, Guangxi, 545005, People’s Republic of China
- Department of Orthopedics, Liuzhou Worker’s Hospital, Liuzhou, Guangxi, 545005, People’s Republic of China
- Xiangtao Xie, The Fourth Affiliated Hospital of Guangxi Medical University, No. 156 Heping Road, Liuzhou, Guangxi, 545027, People’s Republic of China, Tel +867723832719 Email
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