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Kim BC, Lee G, Jang Y, Kim DO, Ju J, Lee CM, Lim W. Characterization of a spontaneous osteopetrosis model using RANKL-dysfunctional mice. Tissue Cell 2024; 88:102412. [PMID: 38776732 DOI: 10.1016/j.tice.2024.102412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 05/13/2024] [Accepted: 05/15/2024] [Indexed: 05/25/2024]
Abstract
Tumor necrosis factor superfamily member 11 (TNFSF11), or receptor activator of nuclear factor-κB ligand (RANKL), is a crucial osteoclast-stimulating factor binding to RANK on osteoclast membranes. Mouse models are powerful tools for understanding the genetic mechanisms of related diseases. Here, we examined the utility of Tnfsf11 mutation in mice for understanding the mechanisms of bone remodeling and dysmorphology. The Tnfsf11gum mouse, discovered in 2011 at Jackson Laboratory, was used to study the genetic landscape associated with TNFSF11 inactivation in bone marrow tissues. Tnfsf11gum/+ and Tnfsf11+/+ mice were subjected to Micro-CT observation, ELISA analysis, histological evaluation, and massively-parallel mRNA sequencing (RNA-Seq) analysis. Tnfsf11gum/+ mice exhibited severe osteopetrotic changes in the bone marrow cavity, along with significantly lower serum RANKL levels and a reduced number of tartrate-resistant acid phosphatase (TRAP)-positive osteoclasts in the bone marrow compared to those in Tnfsf11+/+ mice. However, tooth eruption between Tnfsf11gum/+ and Tnfsf11+/+ mice did not differ. Furthermore, genes involved in osteoblast proliferation and differentiation, including Gli1, Slc35b2, Lrrc17, and Junb were differentially expressed. Heterozygous mutation of TNFSF11 was also associated with a slightly increased expression of genes involved in osteoclast proliferation and differentiation, including Tcirg1, Junb, Anxa2, and Atp6ap1. Overall, we demonstrate that single gene mutations in Tnfsf11 cause bone resorption instability without significantly altering the genes related to osteoblast and osteoclast activity in the bone marrow cavity, thus establishing an optimal resource as an experimental animal model for bone resorption in bone biology research.
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Affiliation(s)
- Beom Chang Kim
- Laboratory of Orthopedic Research, Chosun University Hospital, Republic of Korea; Departments of Premedical Science, College of Medicine, Chosun University, Gwangju 61452, Republic of Korea
| | - Gwangchul Lee
- Laboratory of Orthopedic Research, Chosun University Hospital, Republic of Korea; Departments of Orthopaedic Surgery, College of Medicine, Chosun University, Gwangju 61452, Republic of Korea
| | - Yuria Jang
- Laboratory of Orthopedic Research, Chosun University Hospital, Republic of Korea; Departments of Premedical Science, College of Medicine, Chosun University, Gwangju 61452, Republic of Korea
| | - Dae Ok Kim
- Laboratory of Orthopedic Research, Chosun University Hospital, Republic of Korea; Departments of Premedical Science, College of Medicine, Chosun University, Gwangju 61452, Republic of Korea
| | - Jiwoong Ju
- Laboratory of Orthopedic Research, Chosun University Hospital, Republic of Korea; Departments of Premedical Science, College of Medicine, Chosun University, Gwangju 61452, Republic of Korea
| | - Chang-Moon Lee
- Regional Leading Research Center, Chonnam National University, Yeosu 59626, Republic of Korea; School of Healthcare and Biomedical Engineering, Chonnam National University, Yeosu 59626, Republic of Korea
| | - Wonbong Lim
- Laboratory of Orthopedic Research, Chosun University Hospital, Republic of Korea; Departments of Premedical Science, College of Medicine, Chosun University, Gwangju 61452, Republic of Korea; Departments of Orthopaedic Surgery, College of Medicine, Chosun University, Gwangju 61452, Republic of Korea; Regional Leading Research Center, Chonnam National University, Yeosu 59626, Republic of Korea.
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2
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Molecular Mechanisms Leading from Periodontal Disease to Cancer. Int J Mol Sci 2022; 23:ijms23020970. [PMID: 35055157 PMCID: PMC8778447 DOI: 10.3390/ijms23020970] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 01/07/2022] [Accepted: 01/14/2022] [Indexed: 12/12/2022] Open
Abstract
Periodontitis is prevalent in half of the adult population and raises critical health concerns as it has been recently associated with an increased risk of cancer. While information about the topic remains somewhat scarce, a deeper understanding of the underlying mechanistic pathways promoting neoplasia in periodontitis patients is of fundamental importance. This manuscript presents the literature as well as a panel of tables and figures on the molecular mechanisms of Porphyromonas gingivalis and Fusobacterium nucleatum, two main oral pathogens in periodontitis pathology, involved in instigating tumorigenesis. We also present evidence for potential links between the RANKL–RANK signaling axis as well as circulating cytokines/leukocytes and carcinogenesis. Due to the nonconclusive data associating periodontitis and cancer reported in the case and cohort studies, we examine clinical trials relevant to the topic and summarize their outcome.
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3
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Breast carcinomas with osteoclast-like giant cells: a comprehensive clinico-pathological and molecular portrait and evidence of RANK-L expression. Mod Pathol 2022; 35:1624-1635. [PMID: 35697931 PMCID: PMC9596373 DOI: 10.1038/s41379-022-01112-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Revised: 05/08/2022] [Accepted: 05/12/2022] [Indexed: 11/28/2022]
Abstract
Breast carcinomas (BC) with osteoclast-like giant cells (OGC) are rare. Despite their distinct stromal features, their molecular characteristics remain unknown. Here, we report comprehensive clinico-pathological and molecular findings for 27 patients diagnosed with BC-OGC at Institut Curie between 2000 and 2021. Seventeen (63%) cases were invasive carcinomas of no special type (IC NST) with OGC (OGC-IC NST), four (15%) were mixed or multifocal cases with and without OGC (OGC-Mixed), and six (22%) were metaplastic carcinomas with OGC (OGC-MC). All OGC-IC NST and OGC-Mixed cases were ER+ HER2- tumors (most being luminal A based on transcriptomic subtyping, when available), while all OGC-MC were triple-negative. The median age at diagnosis was 46, 45 and 62 years for OGC-IC NST, OGC-Mixed and OGC-MC, respectively. Three patients developed distant metastases (one OGC-IC NST, two OGC-Mixed), one of whom died of metastatic disease (OGC-Mixed), and one other patient died of locally advanced disease (OGC-MC). Histopathological evaluation comparing 13 OGC-IC NST and 19 control IC NST without OGC confirmed that OGC-IC NST showed significantly higher density of vessels (by CD34 immunohistochemistry (IHC)), iron deposits (Perls stain), and CD68 and CD163-positive cell infiltrates. Genomic findings for nine OGC-IC NST and four OGC-MC were consistent with the underlying histologic subtype, including activating alterations of the PI3K/AKT/mTOR pathway in 7/13 cases. Using RNA-seq data, differential gene expression analysis between OGC-IC NST (n = 7) and control IC NST without OGC (n = 7) revealed significant overexpression of TNFSF11 (RANK-L), TNFRSF11A (RANK), CSF1 (M-CSF), CSF1R, and genes encoding osteoclastic enzymes (MMP9, ACP5, CTSK, CTSB) in OGC-IC NST, while OPG (osteoprotegerin) was underexpressed. We also confirmed for the first time RANK-L expression in BC with OGC by IHC (seen in 15 out of 16 cases, and only in 2 of 16 controls without OGC). These findings could offer a rationale for further investigating RANK-L as a therapeutic target in BC with OGC.
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Gómez-Aleza C, Nguyen B, Yoldi G, Ciscar M, Barranco A, Hernández-Jiménez E, Maetens M, Salgado R, Zafeiroglou M, Pellegrini P, Venet D, Garaud S, Trinidad EM, Benítez S, Vuylsteke P, Polastro L, Wildiers H, Simon P, Lindeman G, Larsimont D, Van den Eynden G, Velghe C, Rothé F, Willard-Gallo K, Michiels S, Muñoz P, Walzer T, Planelles L, Penninger J, Azim HA, Loi S, Piccart M, Sotiriou C, González-Suárez E. Inhibition of RANK signaling in breast cancer induces an anti-tumor immune response orchestrated by CD8+ T cells. Nat Commun 2020; 11:6335. [PMID: 33303745 PMCID: PMC7728758 DOI: 10.1038/s41467-020-20138-8] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 11/12/2020] [Indexed: 12/13/2022] Open
Abstract
Most breast cancers exhibit low immune infiltration and are unresponsive to immunotherapy. We hypothesized that inhibition of the receptor activator of nuclear factor-κB (RANK) signaling pathway may enhance immune activation. Here we report that loss of RANK signaling in mouse tumor cells increases leukocytes, lymphocytes, and CD8+ T cells, and reduces macrophage and neutrophil infiltration. CD8+ T cells mediate the attenuated tumor phenotype observed upon RANK loss, whereas neutrophils, supported by RANK-expressing tumor cells, induce immunosuppression. RANKL inhibition increases the anti-tumor effect of immunotherapies in breast cancer through a tumor cell mediated effect. Comparably, pre-operative single-agent denosumab in premenopausal early-stage breast cancer patients from the Phase-II D-BEYOND clinical trial (NCT01864798) is well tolerated, inhibits RANK pathway and increases tumor infiltrating lymphocytes and CD8+ T cells. Higher RANK signaling activation in tumors and serum RANKL levels at baseline predict these immune-modulatory effects. No changes in tumor cell proliferation (primary endpoint) or other secondary endpoints are observed. Overall, our preclinical and clinical findings reveal that tumor cells exploit RANK pathway as a mechanism to evade immune surveillance and support the use of RANK pathway inhibitors to prime luminal breast cancer for immunotherapy. Receptor activator of nuclear factor-κB (RANK)/RANK-ligand (RANKL) signaling regulates the tumor-immune crosstalk. Here the authors show that systemic RANKL inhibition promotes CD8 + T cell infiltration in patients with early breast cancer and that loss of RANK signaling in tumor cells drives a T cell-dependent anti-tumor response in preclinical models.
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Affiliation(s)
- Clara Gómez-Aleza
- Oncobell, Bellvitge Biomedical Research Institute, IDIBELL, Barcelona, Spain
| | - Bastien Nguyen
- Breast Cancer Translational Research Laboratory J.-C. Heuson, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium.,Marie-Josée and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, NY, 10065, USA
| | - Guillermo Yoldi
- Oncobell, Bellvitge Biomedical Research Institute, IDIBELL, Barcelona, Spain
| | - Marina Ciscar
- Oncobell, Bellvitge Biomedical Research Institute, IDIBELL, Barcelona, Spain.,Molecular Oncology, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Alexandra Barranco
- Oncobell, Bellvitge Biomedical Research Institute, IDIBELL, Barcelona, Spain.,Molecular Oncology, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | | | - Marion Maetens
- Breast Cancer Translational Research Laboratory J.-C. Heuson, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - Roberto Salgado
- Breast Cancer Translational Research Laboratory J.-C. Heuson, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium.,Department of Pathology, GZA-ZNA Ziekenhuizen, Antwerp, Belgium
| | - Maria Zafeiroglou
- Oncobell, Bellvitge Biomedical Research Institute, IDIBELL, Barcelona, Spain
| | - Pasquale Pellegrini
- Oncobell, Bellvitge Biomedical Research Institute, IDIBELL, Barcelona, Spain
| | - David Venet
- Breast Cancer Translational Research Laboratory J.-C. Heuson, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - Soizic Garaud
- Molecular Immunology Unit, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - Eva M Trinidad
- Oncobell, Bellvitge Biomedical Research Institute, IDIBELL, Barcelona, Spain
| | - Sandra Benítez
- Oncobell, Bellvitge Biomedical Research Institute, IDIBELL, Barcelona, Spain
| | - Peter Vuylsteke
- Department of Medical Oncology, Université Catholique de Louvain, CHU UCL, Namur, site Sainte-Elisabeth, Namur, Belgium
| | - Laura Polastro
- Department of Medical Oncology, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - Hans Wildiers
- Department of Oncology, KU Leuven-University of Leuven, Leuven, Belgium
| | - Philippe Simon
- Department of Obstetrics and Gynaecology, Erasme, Université Libre de Bruxelles, Brussels, Belgium
| | - Geoffrey Lindeman
- Peter MacCallum Cancer Centre, The Walter and Eliza Hall Institute of Medical Research and The Royal Melbourne Hospital, Melbourne, VIC, Australia
| | - Denis Larsimont
- Department of Pathology, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - Gert Van den Eynden
- Molecular Immunology Unit, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - Chloé Velghe
- Clinical Trial Supporting Unit, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - Françoise Rothé
- Breast Cancer Translational Research Laboratory J.-C. Heuson, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - Karen Willard-Gallo
- Molecular Immunology Unit, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - Stefan Michiels
- Service de Biostatistique et D'Epidémiologie, Gustave Roussy, CESP, U1018, Université Paris-Sud, Faculté de Médcine, Université Paris-Saclay, Villejuif, France
| | - Purificación Muñoz
- Oncobell, Bellvitge Biomedical Research Institute, IDIBELL, Barcelona, Spain
| | - Thierry Walzer
- Centre International de Recherche en Infectiologie, CIRI, Inserm U1111, CNRS, Université Claude Bernard, Lyon, France
| | - Lourdes Planelles
- BiOncotech Therapeutics, Parc Cientific Universitat, Valencia, Spain
| | - Josef Penninger
- Life Sciences Institute, University of British Columbia, Vancouver, BC, Canada.,IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna, Austria
| | - Hatem A Azim
- Division of Hematology/Oncology, Department of Medicine, American University of Beirut, Beirut, Lebanon
| | - Sherene Loi
- Peter MacCallum Cancer Centre, The Walter and Eliza Hall Institute of Medical Research and The Royal Melbourne Hospital, Melbourne, VIC, Australia
| | - Martine Piccart
- Department of Medical Oncology, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - Christos Sotiriou
- Breast Cancer Translational Research Laboratory J.-C. Heuson, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium. .,Department of Medical Oncology, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium.
| | - Eva González-Suárez
- Oncobell, Bellvitge Biomedical Research Institute, IDIBELL, Barcelona, Spain. .,Molecular Oncology, Spanish National Cancer Research Centre (CNIO), Madrid, Spain.
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Cheng Y, Qiao Y, Shen P, Gao B, Liu X, Kong X, Zhang S, Wu J. Fabrication and in vitro biological activity of functional pH-sensitive double-layered nanoparticles for dental implant application. J Biomater Appl 2020; 34:1409-1421. [PMID: 32054386 DOI: 10.1177/0885328220903615] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Yicheng Cheng
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, China
- Department of Stomatology, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Youbei Qiao
- Department of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Peng Shen
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, China
- Department of Stomatology, Clinical department of Aerospace City, Northern Beijing Medical District, Chinese PLA General Hospital, Beijing, China
| | - Bo Gao
- Department of Stomatology, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Xianghui Liu
- Department of Stomatology, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Xiangwei Kong
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Shaofeng Zhang
- Department of Stomatology, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Jiang Wu
- Department of Stomatology, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
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Giant Cell Lesions of the Maxillofacial Skeleton Express RANKL by RNA In Situ Hybridization Regardless of Histologic Pattern. Am J Surg Pathol 2019; 43:819-826. [DOI: 10.1097/pas.0000000000001257] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Infante M, Fabi A, Cognetti F, Gorini S, Caprio M, Fabbri A. RANKL/RANK/OPG system beyond bone remodeling: involvement in breast cancer and clinical perspectives. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2019; 38:12. [PMID: 30621730 PMCID: PMC6325760 DOI: 10.1186/s13046-018-1001-2] [Citation(s) in RCA: 112] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Accepted: 12/11/2018] [Indexed: 12/21/2022]
Abstract
RANKL/RANK/OPG system consists of three essential signaling molecules: i) the receptor activator of nuclear factor (NF)-kB-ligand (RANKL), ii) the receptor activator of NF-kB (RANK), and iii) the soluble decoy receptor osteoprotegerin (OPG). Although this system is critical for the regulation of osteoclast differentiation/activation and calcium release from the skeleton, different studies have elucidated its specific role in mammary gland physiology and hormone-driven epithelial proliferation during pregnancy. Of note, several data suggest that progesterone induces mammary RANKL expression in mice and humans. In turn, RANKL controls cell proliferation in breast epithelium under physiological conditions typically associated with higher serum progesterone levels, such as luteal phase of the menstrual cycle and pregnancy. Hence, RANKL/RANK system can be regarded as a major downstream mediator of progesterone-driven mammary epithelial cells proliferation, potentially contributing to breast cancer initiation and progression. Expression of RANKL, RANK, and OPG has been detected in breast cancer cell lines and in human primary breast cancers. To date, dysregulation of RANKL/RANK/OPG system at the skeletal level has been widely documented in the context of metastatic bone disease. In fact, RANKL inhibition through the RANKL-blocking human monoclonal antibody denosumab represents a well-established therapeutic option to prevent skeletal-related events in metastatic bone disease and adjuvant therapy-induced bone loss in breast cancer. On the other hand, the exact role of OPG in breast tumorigenesis is still unclear. This review focuses on molecular mechanisms linking RANKL/RANK/OPG system to mammary tumorigenesis, highlighting pre-clinical and clinical evidence for the potential efficacy of RANKL inhibition as a prevention strategy and adjuvant therapy in breast cancer settings.
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Affiliation(s)
- Marco Infante
- Unit of Endocrinology and Metabolic Diseases, Department of Systems Medicine, CTO A. Alesini Hospital, ASL Roma 2, University Tor Vergata, Via San Nemesio, 21, 00145, Rome, Italy
| | - Alessandra Fabi
- Division of Medical Oncology 1, Regina Elena National Cancer Institute, Via Elio Chianesi, 53, 00144, Rome, Italy
| | - Francesco Cognetti
- Division of Medical Oncology 1, Regina Elena National Cancer Institute, Via Elio Chianesi, 53, 00144, Rome, Italy
| | - Stefania Gorini
- Laboratory of Cardiovascular Endocrinology, IRCCS San Raffaele Pisana, Via di Val Cannuta, 247, 00166, Rome, Italy
| | - Massimiliano Caprio
- Laboratory of Cardiovascular Endocrinology, IRCCS San Raffaele Pisana, Via di Val Cannuta, 247, 00166, Rome, Italy.,Department of Human Sciences and Promotion of the Quality of Life, San Raffaele Roma Open University, Via di Val Cannuta, 247, 00166, Rome, Italy
| | - Andrea Fabbri
- Unit of Endocrinology and Metabolic Diseases, Department of Systems Medicine, CTO A. Alesini Hospital, ASL Roma 2, University Tor Vergata, Via San Nemesio, 21, 00145, Rome, Italy.
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Ahern E, Smyth MJ, Dougall WC, Teng MWL. Roles of the RANKL–RANK axis in antitumour immunity — implications for therapy. Nat Rev Clin Oncol 2018; 15:676-693. [DOI: 10.1038/s41571-018-0095-y] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Muschitz GK, Schwabegger E, Fochtmann A, Baierl A, Kocijan R, Haschka J, Gruther W, Schanda JE, Resch H, Rath T, Pietschmann P, Muschitz C. Long-Term Effects of Severe Burn Injury on Bone Turnover and Microarchitecture. J Bone Miner Res 2017; 32:2381-2393. [PMID: 28667771 DOI: 10.1002/jbmr.3211] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 06/13/2017] [Accepted: 06/24/2017] [Indexed: 12/11/2022]
Abstract
Severe burn injury triggers massive alterations in stress hormone levels with a dose-dependent hypermetabolic status including increased bone resorption. This study evaluated bone microarchitecture measured by noninvasive high-resolution peripheral quantitative computed tomography (HR-pQCT). Changes of serum bone turnover markers (BTM) as well as regulators of bone signaling pathways involved in skeletal health were assessed. Standardized effect sizes as a quantitative measure regarding the impact of serum changes and the prediction of these changes on bone microarchitecture were investigated. In total, 32 male patients with a severe burn injury (median total body surface area [TBSA], 40.5%; median age 40.5 years) and 28 matched male controls (median age 38.3 years) over a period of 24 months were included. In patients who had sustained a thermal injury, trabecular and cortical bone microstructure showed a continuous decline, whereas cortical porosity (Ct.Po) and pore volume increased. Initially, elevated levels of BTM and C-reactive protein (CRP) continuously decreased over time but remained elevated. In contrast, levels of soluble receptor activator of NF-κB ligand (sRANKL) increased over time. Osteocalcin, bone-specific alkaline phosphatase (BALP), intact N-terminal type 1 procollagen propeptide (P1NP), and cross-linked C-telopeptide (CTX) acutely reflected the increase of Ct.Po at the radius (R2 = 0.41), followed by the reduction of trabecular thickness at the tibia (R2 = 0.28). In adult male patients, early and sustained changes of markers of bone resorption, formation and regulators of bone signaling pathways, prolonged inflammatory cytokine activities in conjunction with muscle catabolism, and vitamin D insufficiency were observed. These alterations are directly linked to a prolonged deterioration of bone microstructure. The probably increased risk of fragility fractures should be of clinical concern and subject to future interventional studies with bone-protective agents. © 2017 American Society for Bone and Mineral Research.
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Affiliation(s)
- Gabriela Katharina Muschitz
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Medical University Vienna, Vienna, Austria
| | - Elisabeth Schwabegger
- Department of Plastic, Reconstructive, and Aesthetic Surgery, Medical University of Innsbruck, Innsbruck, Austria
| | - Alexandra Fochtmann
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Medical University Vienna, Vienna, Austria
| | - Andreas Baierl
- Department of Statistics and Operations Research, University of Vienna, Vienna, Austria
| | - Roland Kocijan
- St. Vincent Hospital, Medical Department II-VINFORCE, Academic Teaching Hospital of the Medical University of Vienna, Vienna, Austria
| | - Judith Haschka
- St. Vincent Hospital, Medical Department II-VINFORCE, Academic Teaching Hospital of the Medical University of Vienna, Vienna, Austria
| | - Wolfgang Gruther
- University Clinic of Physical Medicine, Rehabilitation, and Occupational Medicine, Medical University Vienna, Vienna, Austria
| | | | - Heinrich Resch
- St. Vincent Hospital, Medical Department II-VINFORCE, Academic Teaching Hospital of the Medical University of Vienna, Vienna, Austria.,Karl Landsteiner Institute for Gastroenterology and Rheumatology, Vienna, Austria.,Bone Diseases Unit, Medical Faculty, Sigmund Freud University, Vienna, Austria
| | - Thomas Rath
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Medical University Vienna, Vienna, Austria
| | - Peter Pietschmann
- Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology, and Immunology, Medical University of Vienna, Vienna, Austria
| | - Christian Muschitz
- St. Vincent Hospital, Medical Department II-VINFORCE, Academic Teaching Hospital of the Medical University of Vienna, Vienna, Austria
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