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Sharma S, Shankar V, Rajender S, Mithal A, Rao SD, Chattopadhyay N. Impact of anti-fracture medications on bone material and strength properties: a systematic review and meta-analysis. Front Endocrinol (Lausanne) 2024; 15:1426490. [PMID: 39257899 PMCID: PMC11384599 DOI: 10.3389/fendo.2024.1426490] [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: 05/01/2024] [Accepted: 07/31/2024] [Indexed: 09/12/2024] Open
Abstract
Background and aims Reduced bone mineral density (BMD) and microarchitectural deterioration contribute to increased fracture risk. Although the effects of anti-fracture medications (AFMs) on BMD are well-documented, their impact on bone material properties (BMPs) remains poorly characterized. Accordingly, we conducted a systematic review and meta-analysis to evaluate the effects of AFMs on BMPs. Based on data availability, we further categorized AFMs into anti-resorptives, bisphosphonates alone, and strontium ranelate subgroups to perform additional analyses of BMPs in osteoporotic patients. Methods We did a comprehensive search of three databases, namely, PubMed, Web of Science, and Google Scholar, using various permutation combinations, and used Comprehensive Meta-Analysis software to analyze the extracted data. Results The 15 eligible studies (randomized and non-randomized) compared the following: (1) 301 AFM-treated patients with 225 on placebo; (2) 191 patients treated with anti-resorptives with 131 on placebo; (3) 86 bisphosphonate-treated patients with 66 on placebo; and (4) 84 strontium ranelate-treated patients with 70 on placebo. Pooled analysis showed that AFMs significantly decreased cortical bone crystallinity [standardized difference in means (SDM) -1.394] and collagen maturity [SDM -0.855], and collagen maturity in cancellous bone [SDM -0.631]. Additionally, anti-resorptives (bisphosphonates and denosumab) significantly increased crystallinity [SDM 0.387], mineral-matrix ratio [SDM 0.771], microhardness [SDM 0.858], and contact hardness [SDM 0.952] of cortical bone. Anti-resorptives increased mineral-matrix ratio [SDM 0.543] and microhardness [SDM 0.864] and decreased collagen maturity [SDM -0.539] in cancellous bone. Restricted analysis of only bisphosphonate-treated studies showed a significant decrease in collagen maturity [SDM -0.650] in cancellous bone and an increase in true hardness [SDM 1.277] in cortical bone. In strontium ranelate-treated patients, there was no difference in BMPs compared to placebo. Conclusion Collectively, our study suggests that AFMs improve bone quality, which explains their anti-fracture ability that is not fully accounted for by increased BMD in osteoporosis patients.
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Affiliation(s)
- Shivani Sharma
- Division of Endocrinology and Centre for Research in ASTHI, CSIR-Central Drug Research Institute, Council of Scientific and Industrial Research, Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Vijay Shankar
- Division of Endocrinology and Centre for Research in ASTHI, CSIR-Central Drug Research Institute, Council of Scientific and Industrial Research, Lucknow, India
| | - Singh Rajender
- Division of Endocrinology and Centre for Research in ASTHI, CSIR-Central Drug Research Institute, Council of Scientific and Industrial Research, Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Ambrish Mithal
- Institute of Endocrinology and Diabetes, Max Healthcare, New Delhi, India
| | - Sudhaker D. Rao
- Division of Endocrinology Diabetes and Bone & Mineral Disorders, and Bone and Mineral Research Laboratory, Henry Ford Health/Michigan State University College of Human Medicine, Detroit, MI, United States
| | - Naibedya Chattopadhyay
- Division of Endocrinology and Centre for Research in ASTHI, CSIR-Central Drug Research Institute, Council of Scientific and Industrial Research, Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
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Schiavone ML, Crisafulli L, Camisaschi C, De Simone G, Liberati FR, Palagano E, Rucci N, Ficara F, Sobacchi C. Rankl genetic deficiency and functional blockade undermine skeletal stem and progenitor cell differentiation. Stem Cell Res Ther 2024; 15:203. [PMID: 38971808 PMCID: PMC11227705 DOI: 10.1186/s13287-024-03803-3] [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: 02/12/2024] [Accepted: 06/16/2024] [Indexed: 07/08/2024] Open
Abstract
BACKGROUND Skeletal Stem Cells (SSCs) are required for skeletal development, homeostasis, and repair. The perspective of their wide application in regenerative medicine approaches has supported research in this field, even though so far results in the clinic have not reached expectations, possibly due also to partial knowledge of intrinsic, potentially actionable SSC regulatory factors. Among them, the pleiotropic cytokine RANKL, with essential roles also in bone biology, is a candidate deserving deep investigation. METHODS To dissect the role of the RANKL cytokine in SSC biology, we performed ex vivo characterization of SSCs and downstream progenitors (SSPCs) in mice lacking Rankl (Rankl-/-) by means of cytofluorimetric sorting and analysis of SSC populations from different skeletal compartments, gene expression analysis, and in vitro osteogenic differentiation. In addition, we assessed the effect of the pharmacological treatment with the anti-RANKL blocking antibody Denosumab (approved for therapy in patients with pathological bone loss) on the osteogenic potential of bone marrow-derived stromal cells from human healthy subjects (hBMSCs). RESULTS We found that, regardless of the ossification type of bone, osteochondral SSCs had a higher frequency and impaired differentiation along the osteochondrogenic lineage in Rankl-/- mice as compared to wild-type. Rankl-/- mice also had increased frequency of committed osteochondrogenic and adipogenic progenitor cells deriving from perivascular SSCs. These changes were not due to the peculiar bone phenotype of increased density caused by lack of osteoclast resorption (defined osteopetrosis); indeed, they were not found in another osteopetrotic mouse model, i.e., the oc/oc mouse, and were therefore not due to osteopetrosis per se. In addition, Rankl-/- SSCs and primary osteoblasts showed reduced mineralization capacity. Of note, hBMSCs treated in vitro with Denosumab had reduced osteogenic capacity compared to control cultures. CONCLUSIONS We provide for the first time the characterization of SSPCs from mouse models of severe recessive osteopetrosis. We demonstrate that Rankl genetic deficiency in murine SSCs and functional blockade in hBMSCs reduce their osteogenic potential. Therefore, we propose that RANKL is an important regulatory factor of SSC features with translational relevance.
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Affiliation(s)
- M L Schiavone
- IRCCS Humanitas Research Hospital, via Manzoni 56, Rozzano, Milan, 20089, Italy
| | - L Crisafulli
- IRCCS Humanitas Research Hospital, via Manzoni 56, Rozzano, Milan, 20089, Italy
- Institute for Genetic and Biomedical Research, Milan Unit, CNR, via Fantoli 16/15, Milan, 20138, Italy
| | - C Camisaschi
- Flow Cytometry Core, IRCCS Humanitas Research Hospital, via Manzoni 56, Rozzano, Milan, 20089, Italy
| | - G De Simone
- Flow Cytometry Core, IRCCS Humanitas Research Hospital, via Manzoni 56, Rozzano, Milan, 20089, Italy
| | - F R Liberati
- IRCCS Humanitas Research Hospital, via Manzoni 56, Rozzano, Milan, 20089, Italy
| | - E Palagano
- Institute of Biosciences and Bioresources, CNR, via Madonna Del Piano 10, Sesto Fiorentino, 50019, FI, Italy
| | - N Rucci
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, Via Vetoio - Coppito 2, L'Aquila, 67100, Italy
| | - F Ficara
- IRCCS Humanitas Research Hospital, via Manzoni 56, Rozzano, Milan, 20089, Italy
- Institute for Genetic and Biomedical Research, Milan Unit, CNR, via Fantoli 16/15, Milan, 20138, Italy
| | - Cristina Sobacchi
- IRCCS Humanitas Research Hospital, via Manzoni 56, Rozzano, Milan, 20089, Italy.
- Institute for Genetic and Biomedical Research, Milan Unit, CNR, via Fantoli 16/15, Milan, 20138, Italy.
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3
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Makras P, Yavropoulou MP, Polyzos SA, Papapoulos SE, Georgakopoulou D, Papatheodorou A, Anastasilakis AD. The relationship between length of denosumab treatment for postmenopausal osteoporosis and serum TRAcP5b measured six months after the last injection. Osteoporos Int 2024; 35:365-370. [PMID: 37783758 DOI: 10.1007/s00198-023-06931-3] [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] [Received: 04/25/2023] [Accepted: 09/25/2023] [Indexed: 10/04/2023]
Abstract
To test the hypothesis that during treatment with denosumab osteomorphs and precursors recycle to higher number of osteoclasts with time, we measured TRAcP5b in serum taken 6 months after the last injection in postmenopausal women treated for 1-10 years. Serum TRAcP5b values were not related to time of exposure to denosumab. PURPOSE In women with postmenopausal osteoporosis the aetiology of the observed inverse relationship between duration of denosumab (Dmab) therapy and bone loss after its discontinuation is currently unknown. In studies in mice inhibition of RANKL is associated with an increase in osteomorphs and osteoclast precursors that recycle into osteoclasts and may accumulate with time. We hypothesized that longer inhibition of RANKL by Dmab will be followed by the synchronous formation of a larger number of osteoclasts after stopping treatment. To test this hypothesis, we measured serum TRAcP5b, a marker of osteoclast numbers, in postmenopausal women treated with Dmab for different periods of time up to 10 years. METHODS TRAcP5b, C-terminal telopeptide of type 1 collagen (CTX) and procollagen type 1 N-terminal propeptide (P1NP) were measured at 6.0 months ± 15 days after last Dmab injection in 59 women who had received Dmab for 4.0 ± 2.3 years (range 1-10 years). Of these, 38 were treatment naïve (group 1) and 21 had received other treatments prior Dmab (group 2). RESULTS Duration of Dmab treatment was not related to serum TRAcP5b values or to TRAcP5b/CTX ratio either in the whole cohort or in each of the two groups separately. In contrast, serum TRAcP5b values were significantly correlated with serum CTX values (rs = 0.619; p < 0.001), but not with serum P1NP values or BMD at all skeletal sites. CONCLUSION Our observations indicate that serum TRAcP5b, measured at 6 months after a Dmab injection, is not a useful early marker for time-dependent increased accumulation of osteoclasts in humans and for identification of patients at risk for a higher rebound increase in bone resorption.
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Affiliation(s)
- Polyzois Makras
- Department of Medical Research, 251 Hellenic Air Force & VA General Hospital, 3 Kanellopoulou st, 11525, Athens, Greece.
- Department of Endocrinology and Diabetes, 251 Hellenic Air Force & VA General Hospital, Athens, Greece.
| | - Maria P Yavropoulou
- Department of Medical Research, 251 Hellenic Air Force & VA General Hospital, 3 Kanellopoulou st, 11525, Athens, Greece
- Εndocrinology Unit, First Department of Propaedeutic and Internal Medicine, National and Kapodistrian University of Athens, Medical School, Athens, Greece
| | - Stergios A Polyzos
- First Laboratory of Pharmacology, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Socrates E Papapoulos
- Department of Medical Research, 251 Hellenic Air Force & VA General Hospital, 3 Kanellopoulou st, 11525, Athens, Greece
- Center for Bone Quality, Department of Internal Medicine, Section Endocrinology, Leiden University Medical Center, Leiden, The Netherlands
| | - Danai Georgakopoulou
- Department of Endocrinology and Diabetes, 251 Hellenic Air Force & VA General Hospital, Athens, Greece
| | - Athanasios Papatheodorou
- Department of Medical Research, 251 Hellenic Air Force & VA General Hospital, 3 Kanellopoulou st, 11525, Athens, Greece
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Ramchand SK, Tsai JN, Lee H, Sassana-Khadka G, Jordan M, Ryan S, Leder BZ. The comparison of alendronate and raloxifene after denosumab (CARD) study: A comparative efficacy trial. Osteoporos Int 2024; 35:255-263. [PMID: 37798320 DOI: 10.1007/s00198-023-06932-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 09/25/2023] [Indexed: 10/07/2023]
Abstract
Denosumab discontinuation results in accelerated bone remodeling, decreased bone mineral density (BMD), and an increased risk of multiple vertebral fractures. Bisphosphonates are at least partially effective at inhibiting these consequences but there have been no randomized clinical trials assessing the efficacy of alternative antiresorptives. PURPOSE The aim of this study was to evaluate the comparative efficacy of alendronate and the SERM, raloxifene, in preventing the post-denosumab high-turnover bone loss. METHODS We conducted an open-label randomized controlled trial in which 51 postmenopausal women at increased risk of fracture were randomized with equal probability to receive 12-months of denosumab 60-mg 6-monthly followed by 12-months of either alendronate 70-mg weekly or raloxifene 60-mg daily. Serum bone remodeling markers were measured at 0,6,12,15,18, and 24 and areal BMD of the distal radius, spine, and hip were measured at 0,12,18 and 24 months. RESULTS After denosumab discontinuation, serum markers of bone remodeling remained suppressed when followed by alendronate, but gradually increased to baseline when followed by raloxifene. In the denosumab-to-alendronate group, denosumab-induced BMD gains were maintained at all sites whereas in the denosumab-to-raloxifene group, BMD decreased at the spine by 2.0% (95% CI -3.2 to -0.8, P = 0.003) and at the total hip by 1.2% (-2.1 to -0.4%, P = 0.008), but remained stable at the femoral neck and distal radius and above the original baseline at all sites. The decreases in spine and total hip BMD in the denosumab-to-raloxifene group (but not the femoral neck or distal radius) were significant when compared to the denosumab-to-alendronate group. CONCLUSIONS These results suggest that after one year of denosumab, one year of alendronate is better able to maintain the inhibition of bone remodeling and BMD gains than raloxifene.
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Affiliation(s)
- Sabashini K Ramchand
- Department of Medicine, Endocrine Unit, Massachusetts General Hospital, Harvard University, Boston, MA, USA.
| | - Joy N Tsai
- Department of Medicine, Endocrine Unit, Massachusetts General Hospital, Harvard University, Boston, MA, USA
| | - Hang Lee
- Biostatistics Center, Massachusetts General Hospital, Boston, MA, USA
| | - Grace Sassana-Khadka
- Department of Medicine, Endocrine Unit, Massachusetts General Hospital, Harvard University, Boston, MA, USA
| | - Mackenzie Jordan
- Department of Medicine, Endocrine Unit, Massachusetts General Hospital, Harvard University, Boston, MA, USA
| | - Savannah Ryan
- Department of Medicine, Endocrine Unit, Massachusetts General Hospital, Harvard University, Boston, MA, USA
| | - Benjamin Z Leder
- Department of Medicine, Endocrine Unit, Massachusetts General Hospital, Harvard University, Boston, MA, USA
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Ramchand SK, Leder BZ. Sequential Therapy for the Long-Term Treatment of Postmenopausal Osteoporosis. J Clin Endocrinol Metab 2024; 109:303-311. [PMID: 37610985 DOI: 10.1210/clinem/dgad496] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 08/03/2023] [Accepted: 08/21/2023] [Indexed: 08/25/2023]
Abstract
Osteoporosis is a chronic condition characterized by decreased bone mass, loss of skeletal integrity, and increased susceptibility to fracture. Drugs used to treat osteoporosis can be classified as those that block bone resorption (antiresorptive), stimulate bone formation (anabolic), or do both. While all currently approved medications reduce the risk of fragility fractures in high-risk populations, they are generally unable to fully restore bone strength in most patients with established disease. Thus, the majority of patients require disease management over many years. Unfortunately, the continuous use of a single drug has limitations, both in terms of efficacy and safety, and so sequential therapy is commonly required. Given the expanding list of pharmacological agents currently available, careful consideration needs to be given as to which drugs to use and in what sequence. This review will evaluate the differential effects of antiresorptive, bone-forming, and dual-acting drugs when used in specific sequences and will explore the current evidence favoring the initial use of bone-forming/dual-acting drugs followed by antiresorptive medications. This review will also examine the notion that long-term treatment with an antiresorptive drug may diminish the efficacy of subsequent treatment with a bone-forming/dual-acting drug. Finally, this review will explore the current evidence pertaining to the specific issue of how to best prevent the clinical ramifications of denosumab cessation.
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Affiliation(s)
- Sabashini K Ramchand
- Department of Medicine, Endocrine Unit, Massachusetts General Hospital, Harvard University, Boston, MA 02114, USA
| | - Benjamin Z Leder
- Department of Medicine, Endocrine Unit, Massachusetts General Hospital, Harvard University, Boston, MA 02114, USA
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6
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Zhang Y, Chen Q. Novel insights into osteocyte and inter-organ/tissue crosstalk. Front Endocrinol (Lausanne) 2024; 14:1308408. [PMID: 38685911 PMCID: PMC11057460 DOI: 10.3389/fendo.2023.1308408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 12/14/2023] [Indexed: 05/02/2024] Open
Abstract
Osteocyte, a cell type living within the mineralized bone matrix and connected to each other by means of numerous dendrites, appears to play a major role in body homeostasis. Benefiting from the maturation of osteocyte extraction and culture technique, many cross-sectional studies have been conducted as a subject of intense research in recent years, illustrating the osteocyte-organ/tissue communication not only mechanically but also biochemically. The present review comprehensively evaluates the new research work on the possible crosstalk between osteocyte and closely situated or remote vital organs/tissues. We aim to bring together recent key advances and discuss the mutual effect of osteocyte and brain, kidney, vascular calcification, muscle, liver, adipose tissue, and tumor metastasis and elucidate the therapeutic potential of osteocyte.
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Affiliation(s)
- Yan Zhang
- Department of Pediatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qingchang Chen
- Department of Ultrasound Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Clinical Research Center for Medical Imaging in Hubei Province, Wuhan, China
- Hubei Province Key Laboratory of Molecular Imaging, Wuhan, China
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7
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De Felice M, Turitto G, Borrelli C, Menditto C, Cangiano R. Combination of immunotherapy, radiotherapy and denosumab as the best approach even for NSCLC poor prognosis patients: a case report with strong response, prolonged survival and a review of literature. Curr Probl Cancer 2023; 47:100947. [PMID: 36681616 DOI: 10.1016/j.currproblcancer.2022.100947] [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: 12/11/2022] [Accepted: 12/30/2022] [Indexed: 01/16/2023]
Abstract
Non-Small Cell Lung Cancer (NSCLC) with bone metastasis and poor performance status has the worst prognosis even in strong PD-L1 expression patients. Treatment approach includes immuno- or chemo-immunotherapy, Radiotherapy (RT) and Bone-Targeted Therapy (BTT) but there is insufficient data to suggest the best time to use each of them, alone or in combination. Using an integrated and synergistic treatment strategy with immunotherapy, radiotherapy, and Denosumab as BTT is probably the best treatment planning for metastatic NSCLC for both good and poor performance status patients, although more data are needed to confirm this approach. Here we describe an interesting case report on patient with extensive bone involvement from NSCLC and PS >2 treated simultaneously with radiotherapy, immunotherapy and BTT, achieving an excellent clinical benefit, radiological and metabolic complete response, as a sort of Lazarus effect. We analyzed our result comparing with currently published data about radio-immunotherapy or immunotherapy and BTT combination even though there is no published experience about integration of all 3 treatments. Approval studies often do not represent real-world experience (RWE), so we analyzed data from both RWE and clinical trials.
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Affiliation(s)
- Marco De Felice
- Department of Medical Oncology, ASL Caserta, AGP Hospital, Piedimonte Matese, Italy; Department of Precision Medicine, Medical Oncology, University of Campania Luigi Vanvitelli, Naples, Italy.
| | - Giacinto Turitto
- Division of Oncology, AORN "Sant' Anna e San Sebastiano", Caserta, Italy
| | - Carola Borrelli
- Department of Medical Oncology, ASL Caserta, AGP Hospital, Piedimonte Matese, Italy; Department of Precision Medicine, Medical Oncology, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Carmine Menditto
- Department of Medical Oncology, ASL Caserta, AGP Hospital, Piedimonte Matese, Italy
| | - Rodolfo Cangiano
- Department of Medical Oncology, ASL Caserta, AGP Hospital, Piedimonte Matese, Italy
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8
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Drejer LA, El-Masri BM, Ejersted C, Andreasen CM, Thomsen LK, Thomsen JS, Andersen TL, Hansen S. Trabecular bone deterioration in a postmenopausal female suffering multiple spontaneous vertebral fractures due to a delayed denosumab injection - A post-treatment re-initiation bone biopsy-based case study. Bone Rep 2023; 19:101703. [PMID: 37576928 PMCID: PMC10412862 DOI: 10.1016/j.bonr.2023.101703] [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: 03/16/2023] [Revised: 07/12/2023] [Accepted: 07/20/2023] [Indexed: 08/15/2023] Open
Abstract
Background Denosumab, is a potent anti-resorptive that, increases bone mineral density, and reduces fracture risk in osteoporotic patients. However, several case studies have reported multiple vertebral fractures in patients discontinuing denosumab. Case presentation This case report describes a 64-year-old female with postmenopausal osteoporosis treated with denosumab, who had her 11th injection delayed by 4 months. The patient suffered eight spontaneous vertebral fractures. After consent, an iliac crest bone biopsy was obtained following re-initiation of the denosumab treatment and analyzed by micro-computed tomography and histomorphometry. Results micro-computed tomography analysis revealed a low trabecular bone volume of 10 %, a low trabecular thickness of 97 μm, a low trabecular spacing of 546 μm, a high trabecular number of 1.8/mm, and a high structure model index of 2.2, suggesting trabecular thinning and loss of trabecular plates. Histomorphometric trabecular bone analysis revealed an eroded perimeter per bone perimeter of 33 % and an osteoid perimeter per bone perimeter of 62 %. Importantly, 88 % of the osteoid perimeter was immediately above an eroded-scalloped cement line with no sign of mineralization, and often with no clear bone-forming osteoblasts on the surface. Moreover, only 5 % of the bone perimeter was mineralizing, reflecting that only 8 % of the osteoid perimeter underwent mineralization, resulting in a mineralization lag time of 545 days. Taken together, this indicates limited bone formation and delayed mineralization. Conclusion We present a case report of multiple vertebral fractures after denosumab discontinuation with histomorphometric evidence that denosumab discontinuation leads to extensive trabecular bone resorption followed by a limited bone formation and delayed mineralization if the denosumab treatment is reinitiated. This highlights the importance of developing optimal discontinuation strategies for patients that are to discontinue treatment.
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Affiliation(s)
- Louise Alstrup Drejer
- Department of Endocrinology, University Hospital of Southern Denmark, Esbjerg, Denmark
| | - Bilal Mohamad El-Masri
- Department of Pathology, Odense University Hospital, Odense, Denmark
- Department of Clinical Research, University of Southern Denmark, Odense, Denmark
- Department of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Charlotte Ejersted
- Department of Endocrinology, Odense University Hospital, Odense, Denmark
| | - Christina Møller Andreasen
- Department of Pathology, Odense University Hospital, Odense, Denmark
- Department of Clinical Research, University of Southern Denmark, Odense, Denmark
- Department of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Lisbeth Koch Thomsen
- Department of Pathology, Odense University Hospital, Odense, Denmark
- Department of Clinical Research, University of Southern Denmark, Odense, Denmark
- Department of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | | | - Thomas Levin Andersen
- Department of Pathology, Odense University Hospital, Odense, Denmark
- 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
| | - Stinus Hansen
- Department of Endocrinology, University Hospital of Southern Denmark, Esbjerg, Denmark
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Milovanovic P, Busse B. Micropetrosis: Osteocyte Lacunar Mineralization in Aging and Disease. Curr Osteoporos Rep 2023; 21:750-757. [PMID: 37917286 DOI: 10.1007/s11914-023-00832-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/20/2023] [Indexed: 11/04/2023]
Abstract
PURPOSE OF REVIEW As the importance of osteocytes for bone mineral homeostasis is increasingly recognized, there is growing interest in osteocyte cell death as a relevant indicator in various physiological and pathological conditions. Micropetrosis is an established term used to describe osteocyte lacunae that are filled with minerals following osteocyte death. While the early reports of micropetrosis were purely descriptive, there is now an increasing body of literature showing quantitative data on micropetrosis in various conditions such as aging, osteoporosis, immobilization, and diabetes, and in osteoporosis treatment (denosumab and bisphosphonates). This review summarizes quantitative findings on micropetrosis, with a particular emphasis on the recent advances in the field. RECENT FINDINGS There is growing evidence that micropetrosis is more common in older, osteoporotic, and immobilized individuals, as well as in individuals with type 1 or type 2 diabetes. Denosumab and bisphosphonates seem to affect lacunar mineralization differently, where specifically bisphosphonates have been shown to prolong osteocyte viability and reduce micropetrosis. Despite continuous proceedings in the field of osteocyte-lacunar-network characteristics, more studies are necessary to further clarify the mechanisms of lacunar mineralization, the inter-site variability of micropetrosis accumulation, the relevance of micropetrosis in various diseases and conditions, and whether micropetrosis could be an indicator of bone fragility or a target for treatment.
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Affiliation(s)
- Petar Milovanovic
- Center of Bone Biology, Institute of Anatomy, Faculty of Medicine, University of Belgrade, Belgrade, Serbia.
| | - Björn Busse
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Interdisciplinary Competence Center for Interface Research (ICCIR), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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10
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Fu Q, Bustamante-Gomez NC, Reyes-Pardo H, Gubrij I, Escalona-Vargas D, Thostenson JD, Palmieri M, Goellner JJ, Nookaew I, Barnes CL, Stambough JB, Ambrogini E, O’Brien CA. Reduced osteoprotegerin expression by osteocytes may contribute to rebound resorption after denosumab discontinuation. JCI Insight 2023; 8:e167790. [PMID: 37581932 PMCID: PMC10561722 DOI: 10.1172/jci.insight.167790] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 08/03/2023] [Indexed: 08/17/2023] Open
Abstract
Denosumab is an anti-RANKL Ab that potently suppresses bone resorption, increases bone mass, and reduces fracture risk. Discontinuation of denosumab causes rapid rebound bone resorption and bone loss, but the molecular mechanisms are unclear. We generated humanized RANKL mice and treated them with denosumab to examine the cellular and molecular conditions associated with rebound resorption. Denosumab potently suppressed both osteoclast and osteoblast numbers in cancellous bone in humanized RANKL mice. The decrease in osteoclast number was not associated with changes in osteoclast progenitors in bone marrow. Long-term, but not short-term, denosumab administration reduced osteoprotegerin (OPG) mRNA in bone. Localization of OPG expression revealed that OPG mRNA is produced by a subpopulation of osteocytes. Long-term denosumab administration reduced osteocyte OPG mRNA, suggesting that OPG expression declines as osteocytes age. Consistent with this, osteocyte expression of OPG was more prevalent near the surface of cortical bone in humans and mice. These results suggest that new osteocytes are an important source of OPG in remodeling bone and that suppression of remodeling reduces OPG abundance by reducing new osteocyte formation. The lack of new osteocytes and the OPG they produce may contribute to rebound resorption after denosumab discontinuation.
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Affiliation(s)
- Qiang Fu
- Center for Musculoskeletal Disease Research
- Division of Endocrinology and Metabolism
| | | | - Humberto Reyes-Pardo
- Center for Musculoskeletal Disease Research
- Division of Endocrinology and Metabolism
| | - Igor Gubrij
- Center for Musculoskeletal Disease Research
- Division of Endocrinology and Metabolism
| | | | | | - Michela Palmieri
- Center for Musculoskeletal Disease Research
- Division of Endocrinology and Metabolism
| | - Joseph J. Goellner
- Center for Musculoskeletal Disease Research
- Division of Endocrinology and Metabolism
| | - Intawat Nookaew
- Center for Musculoskeletal Disease Research
- Department of Biomedical Informatics, and
| | - C. Lowry Barnes
- Center for Musculoskeletal Disease Research
- Department of Orthopaedic Surgery, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Jeffrey B. Stambough
- Center for Musculoskeletal Disease Research
- Department of Orthopaedic Surgery, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Elena Ambrogini
- Center for Musculoskeletal Disease Research
- Division of Endocrinology and Metabolism
- Department of Orthopaedic Surgery, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
- Central Arkansas Veterans Healthcare System, Little Rock, Arkansas, USA
| | - Charles A. O’Brien
- Center for Musculoskeletal Disease Research
- Division of Endocrinology and Metabolism
- Department of Orthopaedic Surgery, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
- Central Arkansas Veterans Healthcare System, Little Rock, Arkansas, USA
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11
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Anastasilakis AD, Makras P, Paccou J, Bisbinas I, Polyzos SA, Papapoulos SE. Similarities and Differences in the Management of Patients with Osteoporotic Vertebral Fractures and Those with Rebound-Associated Vertebral Fractures Following Discontinuation of Denosumab. J Clin Med 2023; 12:5874. [PMID: 37762815 PMCID: PMC10532339 DOI: 10.3390/jcm12185874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/31/2023] [Accepted: 09/07/2023] [Indexed: 09/29/2023] Open
Abstract
Rebound-associated vertebral fractures (RVFx) following denosumab discontinuation are typically multiple, are commonly associated with acute sharp pain, increase the risk of imminent fractures, and are pathogenetically different from common osteoporotic vertebral fractures (VFx). A clinically relevant question is whether patients with RVFx should be managed differently from patients with osteoporotic VFx. To address this question, we performed a systematic search of the PubMed database, and we reviewed current evidence on the optimal management of patients with RVFx. For pain relief of patients with RVFx, potent analgesics, often opioids, are essential. Information on the effectiveness of braces in these patients is scarce. Vertebroplasty and kyphoplasty are strongly contraindicated as they confer a substantial risk for new VFx. Exercise may be helpful, but again evidence is lacking. In contrast to patients with osteoporotic VFx, in whom initial treatment with bone-forming agents is recommended, patients with RVFx should initiate treatment with potent antiresorptives. To summarize, patients who have sustained RVFx following denosumab discontinuation are at a very high risk for new fractures, especially VFx. The management of such patients requires a multidisciplinary approach that should not be restricted to pain relief and administration of antiosteoporotic medication, but should also include back protection, early mobilization, and appropriate exercise.
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Affiliation(s)
| | - Polyzois Makras
- Department of Endocrinology and Diabetes, 251 Hellenic Air Force & VA General Hospital, 115 25 Athens, Greece;
- Department of Medical Research, 251 Hellenic Air Force & VA General Hospital, 115 25 Athens, Greece;
| | - Julien Paccou
- Department of Rheumatology, University of Lille, 59000 Lille, France;
| | - Ilias Bisbinas
- First Department of Orthopaedics, 424 Military General Hospital, 564 29 Thessaloniki, Greece;
| | - Stergios A. Polyzos
- First Laboratory of Pharmacology, School of Medicine, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece;
| | - Socrates E. Papapoulos
- Department of Medical Research, 251 Hellenic Air Force & VA General Hospital, 115 25 Athens, Greece;
- Center for Bone Quality, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
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12
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Pigni S, Mazziotti G. Gestione clinica della terapia con Denosumab: in chi, quando e come interromperla. L'ENDOCRINOLOGO 2023. [PMCID: PMC9906587 DOI: 10.1007/s40619-023-01207-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Denosumab (Dmab) è un potente farmaco anti-riassorbitivo impiegato per il trattamento dell’osteoporosi al dosaggio di 60 mg sottocute ogni sei 6 mesi. A differenza dei bisfosfonati (BPs), Dmab non si accumula nella matrice ossea e, in caso di ritardo o interruzione delle somministrazioni, è noto un effetto rebound sul turnover osseo, che si traduce in una rapida perdita di Bone Mineral Density (BMD) e in un aumento del rischio di fratture vertebrali, spesso cliniche e multiple. Data la rilevanza clinica di tale fenomeno, si rende quindi necessario per gli specialisti dedicati al trattamento delle patologie osteometaboliche conoscere nel dettaglio quali sono le evidenze attualmente disponibili, nonché le principali raccomandazioni relative alla gestione della terapia anti-osteoporotica con Dmab, con particolare attenzione alla sua interruzione (programmata o accidentale), su cui si focalizzerà la presente Rassegna.
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Affiliation(s)
- Stella Pigni
- grid.452490.eDipartimento di Scienze Biomediche, Humanitas University, Pieve Emanuele, MI Italia ,grid.417728.f0000 0004 1756 8807Unità di Endocrinologia, Diabetologia, Andrologia Medica; Centro di Ricerca, Diagnosi e Cura delle Malattie Osteometaboliche, Istituto Clinico Humanitas IRCCS, Rozzano, MI Italia
| | - Gherardo Mazziotti
- grid.452490.eDipartimento di Scienze Biomediche, Humanitas University, Pieve Emanuele, MI Italia ,grid.417728.f0000 0004 1756 8807Unità di Endocrinologia, Diabetologia, Andrologia Medica; Centro di Ricerca, Diagnosi e Cura delle Malattie Osteometaboliche, Istituto Clinico Humanitas IRCCS, Rozzano, MI Italia
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13
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Sølling AS, Tsourdi E, Harsløf T, Langdahl BL. Denosumab Discontinuation. Curr Osteoporos Rep 2023; 21:95-103. [PMID: 36564572 DOI: 10.1007/s11914-022-00771-6] [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: 11/17/2022] [Indexed: 12/25/2022]
Abstract
PURPOSE OF REVIEW To review the pathophysiology, the clinical consequences as well as way of mitigating the effects of denosumab discontinuation. RECENT FINDINGS Treatment with denosumab (DMAB) is reversible and upon discontinuation there is a rapid increase in bone turnover and a subsequent bone loss. During this phase of high bone turnover, an increased risk of fractures has been reported. Therefore, treatment with DMAB could be considered life-long. However, side-effects may prompt the need for discontinuation and moreover, treatment with DMAB may have increased BMD to levels where continuing treatment does not provide further fracture risk reduction. Patients stopping DMAB should be offered subsequent antiresorptive treatment with an intense monitoring regimen during the initial year as most of the bone loss occurs within these initial 12 months. In this review, we evaluated the literature published over the past 1 to 3 years investigating DMAB withdrawal with focus on bone turnover markers, bone mineral density, and fracture risk and the transition to other anti-osteoporosis therapies. Furthermore, we summarized the current recommendations of international guidelines. In this review, we evaluated the literature published over the past 1 to 3 years investigating denosumab (DMAB) discontinuation and the transition to other anti-osteoporosis therapies. Additionally, we summarized the current recommendations of international guidelines.
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Affiliation(s)
- Anne Sophie Sølling
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
- Department of Internal Medicine, Silkeborg Regional Hospital, Silkeborg, Denmark
| | - Elena Tsourdi
- Department of Medicine III & Center for Healthy Aging, Universitätsklinikum Dresden, Dresden, Germany
| | - Torben Harsløf
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Bente L Langdahl
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark.
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14
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Kim AS, Girgis CM, McDonald MM. Osteoclast Recycling and the Rebound Phenomenon Following Denosumab Discontinuation. Curr Osteoporos Rep 2022; 20:505-515. [PMID: 36201122 PMCID: PMC9718877 DOI: 10.1007/s11914-022-00756-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/19/2022] [Indexed: 01/30/2023]
Abstract
PURPOSE OF REVIEW Inhibition of receptor activator of nuclear factor kappa-B ligand (RANKL) with denosumab is an effective treatment in a number of conditions including osteoporosis where suppression of bone resorption is desired. However, denosumab discontinuation is associated with rebound increase in bone resorption and subsequent loss in bone mass and a rapid return to baseline fracture risk. We review recent data on the rebound increase in bone resorption following denosumab discontinuation and the potential mechanisms behind this phenomenon. RECENT FINDINGS Osteoclasts have been considered to be highly specialised cells that undergo apoptosis after fulfilling their function of bone resorption. However, recent studies suggest that osteoclasts are longer lived cells which migrate through vasculature and are capable of undergoing fission into a novel cell type (the osteomorph) and re-fusion in a process termed osteoclast recycling. The life cycle of the osteoclast is more complex than previously appreciated. Osteoclast recycling provides a novel mechanistic framework to examine changes in osteoclast biology in response to treatment of bone diseases and provides an exciting new avenue towards personalised medicine.
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Affiliation(s)
- Albert S Kim
- Bone Biology Program, Garvan Institute of Medical Research, Sydney, Australia
- Faculty of Medicine UNSW Sydney, St Vincent's Clinical School, Kensington, NSW, Australia
- Department of Diabetes and Endocrinology, Westmead Hospital, Westmead, NSW, Australia
| | - Christian M Girgis
- Department of Diabetes and Endocrinology, Westmead Hospital, Westmead, NSW, Australia
- Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia
- The Westmead Institute for Medical Research, Westmead, NSW, Australia
| | - Michelle M McDonald
- Bone Biology Program, Garvan Institute of Medical Research, Sydney, Australia.
- Faculty of Medicine UNSW Sydney, St Vincent's Clinical School, Kensington, NSW, Australia.
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15
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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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16
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Farlay D, Rizzo S, Dempster DW, Huang S, Chines A, Brown JP, Boivin G. Bone Mineral and Organic Properties in Postmenopausal Women Treated With Denosumab for Up to 10 years. J Bone Miner Res 2022; 37:856-864. [PMID: 35249242 DOI: 10.1002/jbmr.4538] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 02/11/2022] [Accepted: 02/20/2022] [Indexed: 11/10/2022]
Abstract
In postmenopausal women with osteoporosis, denosumab (DMAb) therapy through 10 years resulted in significantly higher degree of mineralization of bone, with a subsequent increase from years 2-3 to year 5 and no further difference between years 5 and 10. Our aim was to assess the variables reflecting the quality of bone mineral and organic matrix (Fourier transform infrared microspectroscopy), and the microhardness of bone (Vickers microindentation). Cross-sectional assessments were performed in blinded fashion on iliac bone biopsies from osteoporotic women (72 from FREEDOM trial, 49 from FREEDOM Extension trial), separately in cortical and cancellous compartments. After 2-3 years of DMAb, mineral/matrix ratio and microhardness of cortical bone were significantly higher compared with placebo, whereas mineral maturity, mineral crystallinity, mineral carbonation, and collagen maturity were not different in both bone compartments. Through 5 years of DMAb, mineral carbonation was significantly lower and mineral/matrix ratio, mineral maturity, and crystallinity were significantly higher versus 2-3 years and were not different between 5 and 10 years, with the exception of mineral maturity in cancellous bone. These data support a transition of mineral to more mature crystals (within physiological range) and the completeness of secondary mineralization within 5 years of DMAb treatment. Microhardness in cortical and cancellous compartments was significantly lower at 5 years of DMAb versus 2-3 years and was not different from years 5 to 10. The lower microhardness at years 5 and 10 is likely the result of maturation of the organic matrix in a persistently low state of bone remodeling over 5 and 10 years. © 2022 American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Delphine Farlay
- INSERM, UMR 1033, University of Lyon, Université Claude Bernard Lyon 1, Lyon, France
| | - Sébastien Rizzo
- INSERM, UMR 1033, University of Lyon, Université Claude Bernard Lyon 1, Lyon, France
| | - David W Dempster
- Department of Pathology and Cell Biology, Columbia University, New York, NY, USA.,Regional Bone Center, Helen Hayes Hospital, West Haverstraw, NY, USA
| | - Shuang Huang
- Clinical Development, Amgen Inc., Thousand Oaks, CA, USA
| | - Arkadi Chines
- Clinical Development, Amgen Inc., Thousand Oaks, CA, USA
| | - Jacques P Brown
- CHU de Quebec Research Centre, Laval University, Quebec City, Canada
| | - Georges Boivin
- INSERM, UMR 1033, University of Lyon, Université Claude Bernard Lyon 1, Lyon, France
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17
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Hu Q, Zhong X, Tian H, Liao P. The Efficacy of Denosumab in Patients With Rheumatoid Arthritis: A Systematic Review and Pooled Analysis of Randomized or Matched Data. Front Immunol 2022; 12:799575. [PMID: 35069583 PMCID: PMC8766643 DOI: 10.3389/fimmu.2021.799575] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 12/13/2021] [Indexed: 12/19/2022] Open
Abstract
Objective The purpose of this study was to evaluate the efficacy of denosumab treatment in patients with rheumatoid arthritis (RA). Methods The Medline, Embase and Cochrane Library databases were searched for relevant clinical studies. Studies that assessed the efficacy of denosumab in patients with RA were identified. The primary endpoints were the percent changes in bone mineral density (BMD), and the changes in modified total Sharp score (mTSS), modified Sharp erosion score and joint space narrowing (JSN) score. Pooled analyses were calculated using random-effect models. Results After searching the literature and performing further detailed assessments, 10 studies with a total of 1758 patients were included in the quantitative analysis. Pooled analyses showed that denosumab treatment significantly increased the percent changes in lumbar spine BMD [mean difference (MD): 5.12, confidence intervals (CI): 4.15 to 6.09], total hip BMD (MD: 2.72, 95% CI: 1.80 to 3.64) and femoral neck BMD (MD: 2.20, 95% CI: 0.94 to 3.46) compared with controls. Moreover, denosumab treatment significantly decreased the changes in mTSS (MD: -0.63, 95% CI: -0.86 to -0.41) and modified Sharp erosion score (MD: -0.62, 95% CI: -0.88 to -0.35). Subgroup analysis indicated that denosumab was superior to bisphosphonates for the improvement of BMD and the mitigation of joint destruction. Conclusion Denosumab treatment was associated with increased BMD and alleviated progression of joint destruction in RA patients, even when compared with bisphosphonates.
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Affiliation(s)
- Qiongwen Hu
- Department of Medical Laboratory, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing, China
| | - Xue Zhong
- Department of Nephrology, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing, China
| | - Hua Tian
- Department of Medical Laboratory, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing, China
| | - Pu Liao
- Department of Medical Laboratory, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing, China
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18
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Muñoz A, Docaj A, Ugarteburu M, Carriero A. Poor bone matrix quality: What can be done about it? Curr Osteoporos Rep 2021; 19:510-531. [PMID: 34414561 DOI: 10.1007/s11914-021-00696-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/27/2021] [Indexed: 12/12/2022]
Abstract
PURPOSE OF THE REVIEW Bone's ability to withstand load resisting fracture and adapting to it highly depends on the quality of its matrix and its regulators. This review focuses on the contribution of bone quality to fracture resistance and possible therapeutic targets for skeletal fragility in aging and disease. RECENT FINDINGS The highly organized, hierarchical composite structure of bone extracellular matrix together with its (re)modeling mechanisms and microdamage dynamics determines its stiffness, strength, and toughness. Aging and disease affect the biological processes regulating bone quality, thus resulting in defective extracellular matrix and bone fragility. Targeted therapies are being developed to restore bone's mechanical integrity. However, their current limitations include low tissue selectivity and adverse side effects. Biological and mechanical insights into the mechanisms controlling bone quality, together with advances in drug delivery and studies in animal models, will accelerate the development and translation to clinical application of effective targeted-therapeutics for bone fragility.
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Affiliation(s)
- Asier Muñoz
- Department of Biomedical Engineering, The City College of New York, 160 Convent Avenue, Steinman Bldg. Room 403C, New York, NY, 10031, USA
| | - Anxhela Docaj
- Department of Biomedical Engineering, The City College of New York, 160 Convent Avenue, Steinman Bldg. Room 403C, New York, NY, 10031, USA
| | - Maialen Ugarteburu
- Department of Biomedical Engineering, The City College of New York, 160 Convent Avenue, Steinman Bldg. Room 403C, New York, NY, 10031, USA
| | - Alessandra Carriero
- Department of Biomedical Engineering, The City College of New York, 160 Convent Avenue, Steinman Bldg. Room 403C, New York, NY, 10031, USA.
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19
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Ott SM, Malluche HH, Jorgetti V, Elder GJ. Importance of bone turnover for therapeutic decisions in patients with CKD-MBD. Kidney Int 2021; 100:502-505. [PMID: 34420656 DOI: 10.1016/j.kint.2021.05.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/24/2021] [Accepted: 05/26/2021] [Indexed: 01/13/2023]
Abstract
Patients with chronic kidney disease-mineral and bone disorder (CKD-MBD) frequently have low bone formation rates. A recent review suggested that adynamic bone disease is not always associated with negative outcomes and therefore antiresorptive medications could be used more often. However, there is currently no evidence to support an improvement in fracture risk or mortality in patients with CKD-MBD and low bone turnover who are treated with antiresorptive medication. There is reasonable pathophysiological evidence suggesting that it may even be harmful.
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Affiliation(s)
- Susan M Ott
- Department of Medicine, University of Washington, Seattle, Washington, USA.
| | - Hartmut H Malluche
- Division of Nephrology Bone and Mineral Metabolism, University of Kentucky, Lexington, Kentucky, USA
| | - Vanda Jorgetti
- Faculdade de Medicina, Hospital das Clínicas, Laboratório de Fisiopatologia Renal, Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | - Grahame J Elder
- Department of Renal Medicine, Westmead Hospital, Westmead, New South Wales, Australia; Osteoporosis and Bone Biology Division, Garvan Institute for Medical Research, Darlinghurst, New South Wales, Australia
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20
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Denosumab Discontinuation and the Rebound Phenomenon: A Narrative Review. J Clin Med 2021; 10:jcm10010152. [PMID: 33406802 PMCID: PMC7796169 DOI: 10.3390/jcm10010152] [Citation(s) in RCA: 85] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 12/28/2020] [Accepted: 12/30/2020] [Indexed: 01/26/2023] Open
Abstract
Denosumab is a potent antiresorptive agent that substantially increases bone mineral density and reduces fracture rates at all skeletal sites for as long as it is administered. However, its favorable skeletal effects reverse quickly upon its discontinuation, because of a vast increase of osteoclast number and activity, which leads to a subsequent profound increase of bone turnover above pre-treatment values, a phenomenon commonly described as “rebound phenomenon”. More importantly, most patients experience rapid, profound bone loss due to this burst of bone resorption that may lead in a minority of these patients to occurrence of fractures, especially multiple vertebral fractures. Therefore, subsequent antiresorptive treatment is mandatory, although the optimal regimen is yet to be clarified. In the present review, we outline what is currently known regarding the negative effects of denosumab discontinuation on different aspects of bone status, the factors that may affect them, and strategies to prevent them.
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21
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Tsourdi E, Zillikens MC, Meier C, Body JJ, Gonzalez Rodriguez E, Anastasilakis AD, Abrahamsen B, McCloskey E, Hofbauer LC, Guañabens N, Obermayer-Pietsch B, Ralston SH, Eastell R, Pepe J, Palermo A, Langdahl B. Fracture risk and management of discontinuation of denosumab therapy: a systematic review and position statement by ECTS. J Clin Endocrinol Metab 2020; 106:dgaa756. [PMID: 33103722 DOI: 10.1210/clinem/dgaa756] [Citation(s) in RCA: 115] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Indexed: 01/05/2023]
Abstract
CONTEXT Denosumab discontinuation is characterized by an increase in bone turnover overriding pre-treatment status, a rapid bone loss in the majority and multiple vertebral fractures (VFx) in some patients. METHODS A working group of the European Calcified Tissue Society (ECTS) performed an updated systematic review of existing literature on changes of bone turnover, bone mineral density (BMD), and fracture risk after denosumab discontinuation and provided advice on management based on expert opinion. RESULTS Important risk factors for multiple VFx following denosumab cessation are prevalent VFx, longer duration off therapy, greater gain in hip BMD during therapy, and greater loss of hip BMD after therapy according to a retrospective analysis of the FREEDOM Extension Study. Case series indicate that prior bisphosphonate therapy mitigates the biochemical rebound phenomenon after denosumab discontinuation, but it is uncertain whether this attenuation prevents BMD loss and fractures. Current evidence indicates partial efficacy of subsequent antiresorptive treatment with results seemingly dependent on duration of denosumab treatment. CONCLUSIONS A careful assessment of indications to start denosumab treatment is advised, especially for younger patients. A case for long-term treatment with denosumab can be made for patients at high fracture risk already on denosumab treatment given the favorable efficacy and safety profile. In case of denosumab discontinuation, alternative antiresorptive treatment should be initiated 6 months after the final denosumab injection. Assessment of bone turnover markers may help define the optimal regimen, pending results of ongoing RCTs. Patients having sustained VFx should be offered prompt treatment to reduce high bone turnover.
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Affiliation(s)
- Elena Tsourdi
- Department of Medicine III, Technische Universität Dresden Medical Center, Dresden, Germany
- Center for Healthy Aging, Technische Universität Dresden Medical Center, Dresden, Germany
| | - M Carola Zillikens
- Bone Center, Department of Internal Medicine, Erasmus MC, Rotterdam, The Netherlands
| | - Christian Meier
- Division of Endocrinology, Diabetology and Metabolism, University Hospital and University of Basel, Switzerland
| | - Jean-Jacques Body
- Department of Medicine, CHU Brugmann, Université Libre de Bruxelles, Brussels, Belgium
| | - Elena Gonzalez Rodriguez
- Interdisciplinary Centre for Bone diseases, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | | | - Bo Abrahamsen
- OPEN, University of Southern Denmark, Odense, Denmark
- Department of Medicine, Holbæk Hospital, Holbæk, Denmark
- NDORMS, University of Oxford, Oxford, UK
| | - Eugene McCloskey
- Academic Unit of Bone Metabolism, Department of Oncology and Metabolism, The Mellanby Centre For Bone Research, The Centre for Integrated Research in Musculoskeletal Ageing, University of Sheffield, Sheffield, UK
| | - Lorenz C Hofbauer
- Department of Medicine III, Technische Universität Dresden Medical Center, Dresden, Germany
- Center for Healthy Aging, Technische Universität Dresden Medical Center, Dresden, Germany
- Center for Regenerative Therapies Dresden, Technische Universität Dresden, Dresden, Germany
| | - Nuria Guañabens
- Department of Rheumatology, Metabolic Bone Diseases Unit, Hospital Clínic, Barcelona, CIBERehd, University of Barcelona, Barcelona, Spain
| | - Barbara Obermayer-Pietsch
- Department of Internal Medicine, Division of Endocrinology and Diabetology, Medical University Graz
- Center for Biomarker Research in Medicine (CBmed),-Graz, Austria
| | - Stuart H Ralston
- Centre for Genomic and Experimental Medicine, MRC Institute of Genetics and Molecular Medicine, Western General Hospital, University of Edinburgh, Edinburgh, UK
| | - Richard Eastell
- Mellanby Centre for Bone Research, University of Sheffield, UK
| | - Jessica Pepe
- Department of clinical, internal, anesthesiology and cardiovascular sciences, "Sapienza" University of Rome, Italy
| | - Andrea Palermo
- Department of Endocrinology and Diabetes, University Campus Bio-Medico, Rome, Italy
| | - Bente Langdahl
- Medical Department of Endocrinology, Aarhus University Hospital, Aarhus, Denmark
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22
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Pang KL, Low NY, Chin KY. A Review on the Role of Denosumab in Fracture Prevention. DRUG DESIGN DEVELOPMENT AND THERAPY 2020; 14:4029-4051. [PMID: 33061307 PMCID: PMC7534845 DOI: 10.2147/dddt.s270829] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Accepted: 08/19/2020] [Indexed: 12/13/2022]
Abstract
Denosumab is a receptor activator of nuclear factor kappa-Β ligand inhibitor, which suppresses the bone resorption process to preserve bone mass. It is usually recommended to postmenopausal women and men with high fracture risk. With the recent publication of the results from FREEDOM study and its extension, the long-term effect of denosumab in preventing fragility fractures has been put forward. This review aims at summarising the evidence of denosumab in reducing fracture risk and its safety derived from clinical studies. Most of the evidence are derived from FREEDOM trials up to 10 years of exposure. Denosumab is reported to prevent vertebral and non-vertebral fractures. It is also proven effective in Japanese women, patients with chronic kidney diseases and breast cancer patients receiving antineoplastic therapy. Denosumab discontinuation leads to high remodeling, loss of bone mineral density and increased fracture risk. These negative effects might be preventable by bisphosphonate treatment. The safety profile of denosumab is consistent with increased years of exposure. In conclusion, denosumab is a safe and effective option for reducing fracture risk among patients with osteoporosis.
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Affiliation(s)
- Kok-Lun Pang
- Department of Pharmacology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Nie Yen Low
- Department of Pharmacology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Kok-Yong Chin
- Department of Pharmacology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia.,State Key Laboratory of Oncogenes and Related Genes, Renji-Med X Clinical Stem Cell Research Center, Department of Urology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200030, People's Republic of China
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