Bone ReportsPub Date : 2024-11-22DOI: 10.1016/j.bonr.2024.101817
Lily E. de Vries , Derek F.R. van Loon , Eline M. van Es , DirkJan H.E.J. Veeger , Joost W. Colaris
{"title":"Exploring shape changes in healthy bone growth through 3D spatiotemporal statistical shape models: A scoping review","authors":"Lily E. de Vries , Derek F.R. van Loon , Eline M. van Es , DirkJan H.E.J. Veeger , Joost W. Colaris","doi":"10.1016/j.bonr.2024.101817","DOIUrl":"10.1016/j.bonr.2024.101817","url":null,"abstract":"<div><h3>Objective</h3><div>Analyzing population trends of bone shape variation can provide valuable insights into growth processes. This review aims to overview state-of-the-art spatiotemporal statistical shape modeling techniques, emphasizing their application to 3D skeletal structures during healthy growth.</div></div><div><h3>Methods</h3><div>We searched PubMed and Scopus for articles on statistical shape modeling using a pediatric spatiotemporal dataset of 3D healthy bone models. Dataset characteristics and details on the shape models' development, analyses, and potential clinical use were extracted.</div></div><div><h3>Results</h3><div>Fourteen studies were found eligible, modeling one or multiple lower limb bones, the mandible, the skull, and vertebrae. The majority applied Principal Component Analysis on point distribution models to create a statistical shape model. Shape variation was analyzed based on shape modes, representing a specific shape change as a part of the overall variance. Unscaled models resulted in a more compact statistical shape model than scaled models. The latter represented more subtle shape variations due to the absence of size differences between the bone models. Four studies reported a significant correlation between the first shape mode and age, indicating a relationship between that type of shape variation and growth. Three studies reconstructed 3D models using prediction features of statistical shape modeling. Measuring difference between predicted and actual anatomy resulted in Root Mean Squared Errors below 3 mm.</div></div><div><h3>Conclusion</h3><div>Spatiotemporal statistical shape modeling provides insight into modes of shape variation during growth. Such a model can be used to find predictive factors, like age or sex, and deploy these characteristics to predict someone's bone geometry.</div></div>","PeriodicalId":9043,"journal":{"name":"Bone Reports","volume":"24 ","pages":"Article 101817"},"PeriodicalIF":2.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11653109/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142852608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Identifying the best reference gene for RT-qPCR analyses of the three-dimensional osteogenic differentiation of human induced pluripotent stem cells","authors":"Masakazu Okamoto , Yusuke Inagaki , Kensuke Okamura , Yoshinobu Uchihara , Kenichiro Saito , Akihito Kawai , Munehiro Ogawa , Akira Kido , Eiichiro Mori , Yasuhito Tanaka","doi":"10.1016/j.bonr.2024.101816","DOIUrl":"10.1016/j.bonr.2024.101816","url":null,"abstract":"<div><div>Reverse transcription quantitative real-time polymerase chain reaction (RT-qPCR) is an essential tool for gene expression analysis; choosing appropriate reference genes for normalization is crucial to ensure data reliability. However, most studies on osteogenic differentiation have had limited success in identifying optimal reference genes. To the best of our knowledge, no optimal reference genes in three-dimensional (3D) osteogenic differentiation culture experiments using human induced pluripotent stem cells (hiPSCs) have been identified. In this study, we aimed to identify stable reference genes that could be used for normalization in gene expression analyses during the 3D osteogenic differentiation of hiPSCs using an atelocollagen sponge as a scaffold. Four algorithms—ΔCt, BestKeeper, NormFinder, and geNorm—were used to evaluate the stability of 14 candidate reference genes. Genes encoding TATA box-binding protein, hypoxanthine phosphoribosyltransferase 1, and 14–3-3 protein zeta polypeptide were identified as the most stable reference genes. In comparison, conventionally used reference genes (beta-2 microglobulin and beta-actin genes) ranked among those with low stability. We also demonstrated the successful 3D osteogenic differentiation of hiPSCs on atelocollagen sponge. Our findings provide valuable insights for reference gene selection and bone tissue regeneration from hiPSCs, which could improve the treatment prospects for bone defects and other similar conditions in regenerative medicine.</div></div>","PeriodicalId":9043,"journal":{"name":"Bone Reports","volume":"23 ","pages":"Article 101816"},"PeriodicalIF":2.1,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142703388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Naringin promotes osteogenic potential in bone marrow-derived mesenchymal stem cells via mediation of miR-26a/Ski axis","authors":"Jiawei Zou, Longze Zhou, Guoqiang Liu, Ying Zhang, Lingguo Zeng","doi":"10.1016/j.bonr.2024.101815","DOIUrl":"10.1016/j.bonr.2024.101815","url":null,"abstract":"<div><h3>Background</h3><div>Osteonecrosis of the femoral head (ONFH) is a common orthopedic disease, which seriously affects the quality of life of patients. Naringin has protective effect on ONFH. In present study, we aimed to investigate the mechanism of Naringin regulating miR-26a in ONFH.</div></div><div><h3>Methods</h3><div>Two sequencing datasets (GSE89587 for micro-RNA, GSE123568 for mRNA) related to ONFH were obtained from the GEO database for bioinformatics analysis. Bone marrow-derived mesenchymal stem cells (BMSCs) were treated with adipogenic medium (AM) or osteogenic medium (OM), and then treated with 10 μM, 100 μM or 1000 μM Naringin. Gene and protein levels were detected by RT-qPCR and Western blotting. ALP activity and alizarin red staining (ARS) were applied to investigate the osteogenic differentiation of BMSCs. Oil red O staining was performed to test adipogenic differentiation. The content of triglycerides (TG) in BMSCs was detected by TG detection kit. Double luciferase reporter gene measured the interaction between miR-26a and Ski.</div></div><div><h3>Results</h3><div>Bioinfomatic analyses indicated a significant downregulation of miR-26a and a significant upregulation of Ski in the peripheral blood of patients with ONFH. Naringin significantly promoted the osteogenic differentiation, and increased the ALP activity and ARS. Meanwhile, it decreased the adipogenic differentiation and inhibited TG levels. In addition, miR-26a was downregulated and Ski was increased in AM-treated BMSCs, while miR-26a was upregulated and Ski was decreased in OM-treated BMSCs. Furthermore, miR-26a promoted the osteogenic differentiation and suppressed the adipogenic differentiation in BMSCs. Moreover, Naringin enhanced osteogenic potential in BMSCs was reversed by knockdown of miR-26a or overexpression of Ski.</div></div><div><h3>Conclusion</h3><div>Naringin could promote osteogenic differentiation of BMSCs via mediation of miR-26a/Ski axis. Thereby, Naringin might be a new agent for ONFH treatment.</div></div>","PeriodicalId":9043,"journal":{"name":"Bone Reports","volume":"23 ","pages":"Article 101815"},"PeriodicalIF":2.1,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bone ReportsPub Date : 2024-11-12DOI: 10.1016/j.bonr.2024.101814
Julia Day , Chandrin Jayatilleke , Matthew Roy
{"title":"Improvements with burosumab treatment in an early access programme for adults with X-linked hypophosphataemia: A case series of three patients","authors":"Julia Day , Chandrin Jayatilleke , Matthew Roy","doi":"10.1016/j.bonr.2024.101814","DOIUrl":"10.1016/j.bonr.2024.101814","url":null,"abstract":"<div><div>X-linked hypophosphataemia (XLH) is a life-long phosphate-wasting disorder that causes skeletal deformities, pain, stiffness, and fatigue and impairs quality of life. Burosumab was approved for use in adults in 2020. We describe three adults with persistent XLH symptoms who received burosumab treatment in a real-world setting. Patients report improvements in pain, mobility, physical function, energy, fatigue, and mental wellbeing through patient-reported outcome measures, enriched with further detail from written testimonials.</div></div>","PeriodicalId":9043,"journal":{"name":"Bone Reports","volume":"23 ","pages":"Article 101814"},"PeriodicalIF":2.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bone ReportsPub Date : 2024-11-09DOI: 10.1016/j.bonr.2024.101813
Sarah L. West , Michelle Furman , Rahim Moineddin , Etienne Sochett
{"title":"Association of daily physical activity and bone microarchitecture in young adults with type 1 diabetes — A pilot exploratory study","authors":"Sarah L. West , Michelle Furman , Rahim Moineddin , Etienne Sochett","doi":"10.1016/j.bonr.2024.101813","DOIUrl":"10.1016/j.bonr.2024.101813","url":null,"abstract":"<div><h3>Purpose</h3><div>Physical activity (PA) is an important determinant of skeletal health. In young adults with type 1 diabetes (T1D) fracture risk is increased, yet few studies have examined the PA and bone health relationship. Therefore, this pilot cross-sectional study characterized PA levels and their association with bone parameters measured by high resolution peripheral quantitative computed tomography (HR-pQCT) in young adults with T1D.</div></div><div><h3>Methods</h3><div>HR-pQCT (Xtreme CTII) was used to measure bone outcomes at the distal tibia and radius, and accelerometery (ActiGraph GT3X) recorded daily minutes of light and moderate-vigorous physical activity (MVPA). Quadratic regression analyses were conducted with a <em>p</em>-value ≤ 0.05 considered significant.</div></div><div><h3>Results</h3><div>PA data from 19 young adults (23.1 ± 1.9 years) with T1D was analyzed. Over half (63 %) of participants completed ≥150 min of MVPA per week, however, most measured activity time per day (57 %) was spent in sedentary pursuits. Significant non-linear associations were found between the duration of MVPA and several trabecular bone parameters at the tibia.</div></div><div><h3>Conclusions</h3><div>In young adults with T1D, MVPA may have site specific (tibia) and compartment specific (trabecular) non-linear associations with bone. Further studies should confirm these findings, which may help inform evidence-based exercise recommendations to optimize bone health in young adults with T1D.</div></div>","PeriodicalId":9043,"journal":{"name":"Bone Reports","volume":"23 ","pages":"Article 101813"},"PeriodicalIF":2.1,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bone ReportsPub Date : 2024-11-04DOI: 10.1016/j.bonr.2024.101812
Mohamed Awad , Elizabeth Taylor-Diaz , Amany Tawfik , Khaled Hussein , Ahmed Elmansi , Mahmoud Elashiry , Ranya Elsayed , Linah Shahoumi , James Borke , William Hill , Fanglong Dong , Mohammed E. Elsalanty
{"title":"Zoledronate interrupts pre-osteoclast-induced angiogenesis via SDF-1/CXCR4 pathway","authors":"Mohamed Awad , Elizabeth Taylor-Diaz , Amany Tawfik , Khaled Hussein , Ahmed Elmansi , Mahmoud Elashiry , Ranya Elsayed , Linah Shahoumi , James Borke , William Hill , Fanglong Dong , Mohammed E. Elsalanty","doi":"10.1016/j.bonr.2024.101812","DOIUrl":"10.1016/j.bonr.2024.101812","url":null,"abstract":"<div><h3>Introduction</h3><div>In this study, we tested the hypothesis that pre-osteoclast signaling is key in triggering post-traumatic angiogenesis in alveolar bone via the SDF-1/CXCR4 pathway. Interruption of osteoclast differentiation through zoledronate (Zol) disrupts the crosstalk between pre-osteoclasts and endothelial cells, hindering the initial angiogenic reaction following dental trauma. This disruption could therefore play a role in the pathogenesis of medication-related osteonecrosis of the jaw (MRONJ).</div></div><div><h3>Methods</h3><div>The effect of zoledronate on the expression of SDF1 was tested in pre-osteoclasts (POC) in vitro. Then, we tested the effect of pre-osteoclast conditioned medium on HUVEC cell differentiation, migration, tube-formation, and CXCR4 expression and activity in-vitro. Lastly, we quantified the effect of zoledronate treatment on post-traumatic vascular perfusion of alveolar bone, using microCT-angiography and immunohistochemistry.</div></div><div><h3>Results</h3><div>SDF-1 mRNA expression decreased in Zol-treated POCs (<em>p</em> = 0.02). Flow-Cytometry analysis showed a decrease in CXCL-12<sup>+</sup> (SDF-1α) expressing POCs with Zol treatment (<em>p</em> = 0.0058). On the other hand, CXCR4 mRNA expression was significantly inhibited in Zol-treated HUVECs (<em>p</em> = 0.0063). CXCR4 protein expression and activity showed a corresponding dose-dependent downregulation HUVEC surface treated with conditioned media from POC treated with Zol (<em>p</em> = 0.008 and 0.03, respectively). Similar inhibition was observed of HUVEC migration (<em>p</em> = 0.0012), and tube formation (<em>p</em> < 0.0001), effects that were reversed with SDF-1. Finally, there was a significant reduction of CD31<sup>+</sup> HUVECs in Alveolar bone of Zol-treated rats (<em>p</em> = 0.0071), confirmed by significantly lower percentage of blood vessel volume (<em>p</em> = 0.026), and marginally lower vessel number (<em>p</em> = 0.062) in the alveolar bone.</div></div><div><h3>Conclusion</h3><div>Pre-osteoclasts play a crucial role in the initial angiogenic response in alveolar bone following dental extraction. Disruption of this process may be a predisposing factor to osteonecrosis.</div></div>","PeriodicalId":9043,"journal":{"name":"Bone Reports","volume":"23 ","pages":"Article 101812"},"PeriodicalIF":2.1,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Treatment with bariatric surgery in patients with osteogenesis imperfecta and severe obesity","authors":"Jannie Dahl Hald , Asta-Marie Welander Hald , Torben Harsløf , Bente Langdahl , Jens Meldgaard Bruun","doi":"10.1016/j.bonr.2024.101811","DOIUrl":"10.1016/j.bonr.2024.101811","url":null,"abstract":"","PeriodicalId":9043,"journal":{"name":"Bone Reports","volume":"23 ","pages":"Article 101811"},"PeriodicalIF":2.1,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bone ReportsPub Date : 2024-10-15DOI: 10.1016/j.bonr.2024.101810
Anne Briolay , François Duboeuf , Séverine Delplace , Leyre Brizuela , Olivier Peyruchaud , David Magne , Carole Bougault
{"title":"Voluntary exercise in mice triggers an anti-osteogenic and pro-tenogenic response in the ankle joint without affecting long bones","authors":"Anne Briolay , François Duboeuf , Séverine Delplace , Leyre Brizuela , Olivier Peyruchaud , David Magne , Carole Bougault","doi":"10.1016/j.bonr.2024.101810","DOIUrl":"10.1016/j.bonr.2024.101810","url":null,"abstract":"<div><div>Biomechanical stimulation is proposed to occupy a central place in joint homeostasis, but the precise contribution of exercise remains elusive. We aimed to characterize in vivo the impact of mechanical stimulation on the cell-controlled regulation of ossification within the ankles of healthy mice undergoing mild physical activity. DBA/1 male mice were subjected to voluntary running exercise for two weeks, and compared to mice housed in standard conditions (<em>n</em> = 20 per group). Free access to activity wheels resulted in a running exercise of 5.5 ± 0.8 km/day at 14.5 ± 0.5 m/min. Serum levels of alkaline phosphatase, IL-6, IL-8/Kc, IL-17a, and TNF-α were measured. No change in systemic inflammation was detected. The bone architecture of the femur and the calcaneus was unchanged, as revealed by μCT and histology of the enthesis of the Achilles tendon. mRNAs were extracted from femurs, tibias, and ankle joints before RT-qPCR analysis. The expression of the mechanosensitive genes <em>Sclerostin</em> (<em>Sost</em>) and <em>Periostin</em> (<em>Postn</em>) was not impacted by the exercise in long bones. Oppositely, <em>Sost</em> and <em>Postn</em> levels were modulated by exercise in joints, and osteogenic markers (<em>Col10a1</em>, <em>Runx2</em>, <em>Osx</em>, and <em>Dmp1</em>) were downregulated in the exercise group. In addition, the tenogenic markers <em>Scx</em>, <em>Mkx</em>, and <em>Tnmd</em> were upregulated by exercise. Thus, voluntary exercise affected the phenotype of joint cells without impacting long bones. As gene expression of <em>Bmp2</em>, <em>Bmp4</em>, and <em>Id1</em> was also reduced in these cells, an off-regulation of BMP signaling could be partly responsible for their mechanosensitive response. Running exercise seemed to preserve the tendon from its progressive ossification, as seen in numerous enthesopathies. This study paves the way to future experiments for investigating the effects of mechanical stimulation in various mouse models.</div></div>","PeriodicalId":9043,"journal":{"name":"Bone Reports","volume":"23 ","pages":"Article 101810"},"PeriodicalIF":2.1,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bone ReportsPub Date : 2024-10-10DOI: 10.1016/j.bonr.2024.101809
Shreya Kapoor, Muskan Gupta , Leena Sapra , Taranjeet Kaur, Rupesh K. Srivastava
{"title":"Delineating the nexus between gut-intratumoral microbiome and osteo-immune system in bone metastases","authors":"Shreya Kapoor, Muskan Gupta , Leena Sapra , Taranjeet Kaur, Rupesh K. Srivastava","doi":"10.1016/j.bonr.2024.101809","DOIUrl":"10.1016/j.bonr.2024.101809","url":null,"abstract":"<div><div>Emerging insights in osteoimmunology have enabled researchers to explore in depth the role of immune modulation in regulating bone health. Bone is one of the common sites of metastasis notably in case of breast cancer, prostate cancer and several other cancer types. High calcium ion concentration and presence of several factors within the mineralized bone matrix including TGF-β, BMP etc., aid in tumor growth and proliferation. Accumulating evidence has substantiated the role of the gut-microbiota (GM) in tumorigenesis, further providing a strong impetus for the growing “immune-cancer-gut microbiota” relationship. Recent advancements in research further highlight the importance of the intra-tumor microbiota in conjunction with GM in cancer metastasis. Intratumoral microbiota owing to their ability to cause genetic instability, mutations, and epigenetic modifications within the tumor microenvironment, has been recognized to affect cancer cell physiology. The host microbiota and immune system crosstalk shapes the innate and adaptive arms of the immune system, which is the key player in cancer progression. In this review, we aim to decipher the role of microorganisms mediating bone metastasis by shedding light on the immuno-onco-microbiome (IOM) axis. We discussed the feasible cancer therapeutic interventions based on the modulation of the microbiome-immune cell axis which includes prebiotics, probiotics, and postbiotics. Here, we leverage the conceptual framework based on the published articles on microbiota-based therapies to target bone metastases. Understanding this complicated nexus will provide insights into fundamental factors governing bone metastases which will subsequently help in managing this malignancy with better efficacy.</div></div>","PeriodicalId":9043,"journal":{"name":"Bone Reports","volume":"23 ","pages":"Article 101809"},"PeriodicalIF":2.1,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142446865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bone ReportsPub Date : 2024-10-02DOI: 10.1016/j.bonr.2024.101808
Yuanzhen Peng , Helen M. Bramlett , W. Dalton Dietrich , Alex Marcillo , Juliana Sanchez-Molano , Ofelia Furones-Alonso , Jay J. Cao , Jenney Huang , Andrew A. Li , Jian Q. Feng , William A. Bauman , Weiping Qin
{"title":"Administration of low intensity vibration and a RANKL inhibitor, alone or in combination, reduces bone loss after spinal cord injury-induced immobilization in rats","authors":"Yuanzhen Peng , Helen M. Bramlett , W. Dalton Dietrich , Alex Marcillo , Juliana Sanchez-Molano , Ofelia Furones-Alonso , Jay J. Cao , Jenney Huang , Andrew A. Li , Jian Q. Feng , William A. Bauman , Weiping Qin","doi":"10.1016/j.bonr.2024.101808","DOIUrl":"10.1016/j.bonr.2024.101808","url":null,"abstract":"<div><div>We previously reported an ability of low-intensity vibration (LIV) to improve selected biomarkers of bone turnover and gene expression and reduce osteoclastogenesis but lacking of evident bone accrual. In this study, we demonstrate that a prolonged course of LIV that initiated at 2 weeks post-injury and continued for 8 weeks can protect against bone loss after SCI in rats. LIV stimulates bone formation and improves osteoblast differentiation potential of bone marrow stromal stem cells while inhibiting osteoclast differentiation potential of marrow hematopoietic progenitors to reduce bone resorption. We further demonstrate that the combination of LIV and RANKL antibody reduces SCI-related bone loss more than each intervention alone. Our findings that LIV is efficacious in maintaining sublesional bone mass suggests that such physical-based intervention approach would be a noninvasive, simple, inexpensive and practical intervention to treat bone loss after SCI. Because the combined administration of LIV and RANKL inhibition better preserved sublesional bone after SCI than either intervention alone, this work provides the impetus for the development of future clinical protocols based on the potential greater therapeutic efficacy of combining non-pharmacological (e.g., LIV) and pharmacological (e.g., RANKL inhibitor or other agents) approaches to treat osteoporosis after SCI or other conditions associated with severe immobilization.</div></div>","PeriodicalId":9043,"journal":{"name":"Bone Reports","volume":"23 ","pages":"Article 101808"},"PeriodicalIF":2.1,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142428820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}