Masatake Matsuoka, Kenta Uchibe, Ningfeng Tang, Hongying Tian, Akiko Suzuki, Takeshi Oichi, Yu Usami, Ivan Alferiev, Satoru Otsuru, Joshua M Abzug, John E Herzenberg, Maurizio Pacifici, Motomi Enomoto-Iwamoto, Michael Chorny, Masahiro Iwamoto
{"title":"Retinoid-impregnated nanoparticles enable control of bone growth by site-specific modulation of endochondral ossification in mice.","authors":"Masatake Matsuoka, Kenta Uchibe, Ningfeng Tang, Hongying Tian, Akiko Suzuki, Takeshi Oichi, Yu Usami, Ivan Alferiev, Satoru Otsuru, Joshua M Abzug, John E Herzenberg, Maurizio Pacifici, Motomi Enomoto-Iwamoto, Michael Chorny, Masahiro Iwamoto","doi":"10.1093/jbmr/zjaf018","DOIUrl":"10.1093/jbmr/zjaf018","url":null,"abstract":"<p><p>Growth-plate (GP) injures in limbs and other sites can impair GP function and cause deceleration of bone growth, leading to progressive bone lengthening imbalance, deformities and/or physical discomfort, decreased motion and pain. At present, surgical interventions are the only means available to correct these conditions by suppressing the GP activity in the unaffected limb and/or other bones in the ipsilateral region. Here, we aimed to develop a pharmacologic treatment of GP growth imbalance that involves local application of nanoparticles (NP)-based controlled release of a selective retinoic acid nuclear receptor gamma (RARγ) agonist drug. When RARγ agonist-loaded NP were implanted near the medial and lateral sides of proximal tibial growth plate in juvenile C57BL/6J mice, the GP underwent involution and closure. Overall tibia length was shortened compared to the contralateral element implanted with drug-free control NP. Importantly, when the RARγ agonist NP were implanted on the lateral side only, the adjacent epiphysis tilted toward the lateral side, leading to apical angulation of the tibia. In contrast to the local selectivity of these responses, systemic administration of RARγ agonists led to GP closure at many sites, inhibiting skeletal growth over time. Agonists for RARα and RARβ elicited no obvious responses over parallel regimens. Our findings provide novel evidence that RARγ agonist-loaded NP can control activity, function and directionality of a targeted GP, offering a potential and clinically-relevant alternative or supplementation to surgical correction of limb length discrepancy and angular deformities.</p>","PeriodicalId":185,"journal":{"name":"Journal of Bone and Mineral Research","volume":" ","pages":"535-547"},"PeriodicalIF":5.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12010157/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143062395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mícheál Ó Breasail, Tafadzwa Madanhire, Cynthia Kahari, Peter R Ebeling, Victoria Simms, Lisa K Micklesfield, Rashida A Ferrand, Celia L Gregson, Kate A Ward
{"title":"Trabecular bone deficits predominate in the appendicular skeleton of midlife women living with HIV: findings from a cross-sectional study in Zimbabwe.","authors":"Mícheál Ó Breasail, Tafadzwa Madanhire, Cynthia Kahari, Peter R Ebeling, Victoria Simms, Lisa K Micklesfield, Rashida A Ferrand, Celia L Gregson, Kate A Ward","doi":"10.1093/jbmr/zjaf021","DOIUrl":"10.1093/jbmr/zjaf021","url":null,"abstract":"<p><p>HIV-related mortality has fallen due to the scale-up of antiretroviral therapy (ART), so more women living with HIV (WLH) now live to reach menopause. Menopausal estrogen loss causes bone loss, as do HIV and certain ART regimens. However, quantitative bone data from WLH are few in Africa. A cross-sectional study of women aged 40-60 yr (49% WLH) was conducted in Harare, Zimbabwe. Menopause status, fracture history, HIV status and treatment, and anthropometry were collected, and radial/tibial peripheral QCT (pQCT) scans were performed. pQCT outcomes were distal radius and tibia trabecular volumetric BMD (vBMD), total area, and compressive bone strength (BSIc); proximal radius and tibia cortical vBMD, BMC, cortical thickness, bone area, and stress-strain index (SSI). Linear regression determined differences by HIV status, minimally adjusted for age and menopause status, and further adjusted for height and fat mass. Relationships between pQCT parameters and major osteoporotic fracture history were explored using univariate logistic regression. In WLH, linear regression assessed associations between HIV and ART durations on pQCT measures. 384 women mean (SD) age 49.7 (5.8) yr had pQCT data. WLH had lower absolute pQCT measures at all sites. Overall, HIV-related deficits were robust to adjustment for age, menopause status, height, and fat mass: WLH had lower trabecular vBMD (radius -7.3 [-12.5; -2.0]%, tibia -5.4 [-9.1; -1.7]%), and cortical vBMD (radius -3.5 [-5.9; -1.1]%, tibia -1.1 [-1.6; -0.5]%). Strength estimates were lower in WLH and of similar magnitude at the radius and tibia. Longer HIV duration was associated with lower radius bone area, BMC, and estimates of bone strength, independent of ART duration. Trabecular deficits predominate in WLH, though with age cortical compartment bone loss may increase in importance. This is particularly concerning as these differences were observed at the radius, a common site of postmenopausal osteoporotic fracture.</p>","PeriodicalId":185,"journal":{"name":"Journal of Bone and Mineral Research","volume":" ","pages":"454-462"},"PeriodicalIF":5.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12010156/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143035478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Bone health in women living with HIV in Sub-Saharan Africa: antiretroviral therapy, lactation, and menopause.","authors":"Florence Nabwire","doi":"10.1093/jbmr/zjaf015","DOIUrl":"10.1093/jbmr/zjaf015","url":null,"abstract":"","PeriodicalId":185,"journal":{"name":"Journal of Bone and Mineral Research","volume":" ","pages":"449-450"},"PeriodicalIF":5.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143254202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Flavia Amadeu de Oliveira, Cintia Kazuko Tokuhara, Fatma F Mohamed, Sonoko Narisawa, Elis J Lira Dos Santos, Natalie L Andras, Mohammad Shadid, Koichi Miyake, Brian L Foster, José Luis Millán
{"title":"Preclinical evaluation of the efficacy and safety of adeno-associated virus 8-tissue-nonspecific alkaline phosphatase-D10 in Alpl-/- and AlplPrx1/Prx1 mouse models for the treatment of early and late-onset hypophosphatasia.","authors":"Flavia Amadeu de Oliveira, Cintia Kazuko Tokuhara, Fatma F Mohamed, Sonoko Narisawa, Elis J Lira Dos Santos, Natalie L Andras, Mohammad Shadid, Koichi Miyake, Brian L Foster, José Luis Millán","doi":"10.1093/jbmr/zjaf005","DOIUrl":"10.1093/jbmr/zjaf005","url":null,"abstract":"<p><p>We previously documented successful resolution of skeletal and dental disease in the infantile and late-onset murine models of hypophosphatasia (HPP) with a single injection of an adeno-associated serotype 8 vector encoding mineral-targeted TNAP (AAV8-TNAP-D10). Here, we conducted dosing studies in both HPP mouse models. A single escalating dose from 4 × 108 up to 4 × 1010 (vg/b) was intramuscularly injected into 4-day-old Alpl-/- mice (an infantile HPP model) and a single dose from 4 × 106 up to 4 × 109 (vg/b) was administered to 8-wk-old AlplPrx1/Prx1 mice (a late-onset HPP model). Wild-type littermates were used as controls. Serum alkaline phosphatase activity was increased, and PPi levels were decreased in a dose-dependent manner in both the Alpl-/- and AlplPrx1/Prx1 models. Radiographic and μCT analysis of long bones of female and male Alpl-/- mice showed full correction of skeletal phenotype at 4 × 1010 vg/b. We observed full correction of the bone phenotype at 4 × 108 and 4 × 109 in female AlplPrx1/Prx1 mice, but bones remained hypomineralized with the 4 × 106 and 4 × 107 (vg/b) doses after 70 d of treatment. We observed skeletal improvements using the 4 × 109 (vg/b) dose, but the phenotype was not fully corrected in male AlplPrx1/Prx1. Immunohistochemistry using anti-TNAP and anti-D10 antibodies showed high immunolocalization in the femurs of female AlplPrx1/Prx1 mice, while D10 immunolocalization was high in the liver of male AlplPrx1/Prx1 mice at a dose of 4 × 109 (vg/b). This sex-dependent difference was not seen in the infantile HPP model. A serum proteome analysis showed enhanced inflammatory pathways in treated AlplPrx1/Prx1 males compared to treated female mice. We also found a few areas of ectopic calcification in soft organs at the highest tested dose of 4 × 1010 (vg/b) in Alpl-/- or 4 × 109 (vg/b) in the AlplPrx1/Prx1 model. This pre-clinical study will inform the design of clinical trials to develop gene therapy in early-onset and late-onset HPP patients.</p>","PeriodicalId":185,"journal":{"name":"Journal of Bone and Mineral Research","volume":" ","pages":"463-477"},"PeriodicalIF":5.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12010167/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142969023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Constantin Schmidt, Marcel S Woo, Assil-Ramin Alimy, Anke Baranowsky, Susanne Krasemann, Timur A Yorgan, Frank Timo Beil, Thorsten Schinke, Johannes Keller, Manuel A Friese, Michael Amling, Tim Rolvien
{"title":"Biphasic bone loss in experimental autoimmune encephalomyelitis.","authors":"Constantin Schmidt, Marcel S Woo, Assil-Ramin Alimy, Anke Baranowsky, Susanne Krasemann, Timur A Yorgan, Frank Timo Beil, Thorsten Schinke, Johannes Keller, Manuel A Friese, Michael Amling, Tim Rolvien","doi":"10.1093/jbmr/zjaf027","DOIUrl":"10.1093/jbmr/zjaf027","url":null,"abstract":"<p><p>Multiple sclerosis (MS) is a chronic autoimmune disorder of the central nervous system (CNS) and a common cause of neurological disabilities in young adults. Although it is known that the peripheral immune landscape is altered in people with MS (pwMS), the impact on other organ systems than the CNS is frequently overlooked. In addition to neurological deficits, pwMS suffer from impaired bone health and increased fracture risk. However, the mechanisms underlying bone loss in pwMS are poorly understood. Here, we investigated the compartment-specific bone microarchitecture as well as cellular and molecular mechanisms of altered bone remodeling in pwMS and the corresponding mouse model of experimental autoimmune encephalomyelitis (EAE). We show that pwMS and EAE mice have reduced bone mineral density characterized by a combined loss of trabecular and cortical bone. Intriguingly, bone loss in EAE followed a biphasic dynamic defined by increased osteocyte apoptosis associated with decreased bone formation in acute EAE and increased bone resorption in the chronic phase, which could be explained by increased CXCL13/CXCR5 signaling. In conclusion, the identified stage-dependent mechanism for bone loss in EAE may help to develop improved strategies for osteoporosis treatment in pwMS.</p>","PeriodicalId":185,"journal":{"name":"Journal of Bone and Mineral Research","volume":" ","pages":"522-534"},"PeriodicalIF":5.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143424636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Mdm2-p53 axis links cementocyte survival to cellular cementum volume.","authors":"Xue Tian, Guobin Yang, Huiwen Zheng, Yixing Pi, Zhengguo Cao, Peipei Duan, Zhi Chen, Guohua Yuan","doi":"10.1093/jbmr/zjaf025","DOIUrl":"10.1093/jbmr/zjaf025","url":null,"abstract":"<p><p>Cementocytes are terminally differentiated cells embedded in cellular cementum, an important hard tissue covering the apical regions of tooth roots. However, the roles of cementocytes in cellular cementum remain enigmatic. Here, we show that Murine Double Minute 2 (Mdm2), an E3 ubiquitin ligase that plays vital roles in regulating cell proliferation, apoptosis, and differentiation to influence tissue or organ development, is highly expressed in the cementocytes of mice. To investigate the role of cementocyte-expressed Mdm2, Dmp1-Cre;Mdm2flox/flox (Mdm2 cKO)mice were obtained to inactivate Mdm2 in cementocytes. The results showed that Mdm2 was successfully ablated and Mdm2 cKO mice display increased cementocyte apoptosis and reduced cellular cementum volume. p53, the canonical substrate of Mdm2, was accumulated and hyperactivated in the cementocytes of Mdm2 cKO mice and in cultured IDG-CM6 cells (a cementocyte cell line) treated with Nutlin3a, an inhibitor of Mdm2. Further experiments showed that inactivation of 1 allele of p53 significantly rescued the increased cementocyte apoptosis and the decreased cellular cementum volume in Mdm2 cKO mice. Therefore, p53 is targeted by Mdm2 for degradation and mediates the role of Mdm2 in cementocyte survival and cellular cementum volume. Notably, Mdm2 cKO mice exhibited decreased differentiation of cementoblasts (the cell type primarily responsible for cementum deposition) and reduced rate of cellular cementum deposition. Meanwhile, OCCM-30 cells (a cementoblast cell line) showed diminished migration, proliferation, differentiation, and mineralization ability after culture with conditioned medium (CM) from Nutlin3a-pretreated IDG-CM6 cells. Intriguingly, Mdm2 cKO mice displayed significantly increased osteoclast formation and cementum resorption. Meanwhile, in vitro experiments verified that CM from Nutlin3a-pretreated IDG-CM6 cells induced osteoclast differentiation of bone marrow macrophages. Collectively, these results demonstrate that Mdm2-mediated degradation of p53 promotes cementocyte survival, and that cementocytes affect the cell behaviors of cementoblasts and osteoclasts through a paracrine mode to modulate cellular cementum volume.</p>","PeriodicalId":185,"journal":{"name":"Journal of Bone and Mineral Research","volume":" ","pages":"548-560"},"PeriodicalIF":5.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143187871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rajesh K Jain, Jennifer Y Liu, Richard W Grant, Shanzay Haider, Elbert S Huang, Neda Laiteerapong, Kasia J Lipska, Joan C Lo, Howard H Moffet, Melissa M Parker, Andrew J Karter
{"title":"Biases in the performance of FRAX without BMD in predicting fracture risk in a multiethnic population with diabetes: the Diabetes and Aging Study.","authors":"Rajesh K Jain, Jennifer Y Liu, Richard W Grant, Shanzay Haider, Elbert S Huang, Neda Laiteerapong, Kasia J Lipska, Joan C Lo, Howard H Moffet, Melissa M Parker, Andrew J Karter","doi":"10.1093/jbmr/zjaf012","DOIUrl":"10.1093/jbmr/zjaf012","url":null,"abstract":"<p><p>Fracture risk calculators, such as the Fracture Risk Assessment Tool (FRAX), calculate the risk of major osteoporotic fracture (MOF) and hip fracture but do not account for the excess risk of fracture in people with diabetes. We examined the predictive performance of FRAX without BMD in ethnically diverse, older patients with diabetes. Patients included were between ages 65 and 89 from the Kaiser Permanente Northern California Diabetes Registry and not already taking osteoporosis medications. Race and ethnicity were self-identified. We calculated FRAX without BMD based on baseline characteristics and assessed how well FRAX predicted MOF and hip fracture over follow-up. Predictive performance was based on measures of discrimination (area under the receiver operator curve, AUC) and calibration (observed-to-predicted ratio, O/P). We identified 96 914 patients (47.0% female), of whom 5383 (5.6%) and 1767 (1.8%) had MOF and hip fracture, respectively, over a mean follow-up of 4.3 yr. The AUC for MOF and hip fracture were 0.72 and 0.77, respectively. FRAX mildly underestimated MOF and hip fracture rates (O/P 1.2 for both) overall. Discrimination was similar by race and ethnicity and diabetes duration but was worse in those over age 75 (AUC < 0.7). In some groups, there were substantial calibration errors, such as Hispanic women (O/P: 1.8 and 1.5), Black men (O/P: 1.5 and 1.8), those with duration of diabetes ≥20 yr (O/P: 1.6 and 1.5), and those over the age of 80 (O/P: 1.4 and 1.2) for MOF and hip fracture, respectively. While the discriminatory performance of FRAX without BMD was good overall in patients with diabetes, it underestimated risk in Hispanic women, Black men, those with long duration of diabetes, and in the oldest patients with diabetes. These algorithmic biases suggest that diabetes-specific tools may be needed to stratify fracture risk in patients with diabetes.</p>","PeriodicalId":185,"journal":{"name":"Journal of Bone and Mineral Research","volume":" ","pages":"478-491"},"PeriodicalIF":5.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12010159/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143057450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Liam E Fouhy, Kelsey M Mangano, Xiyuan Zhang, Bess Dawson-Hughes, David J Cornell, Katherine L Tucker, Sabrina E Noel
{"title":"Association between urinary catecholamines and glucocorticoids and bone mineral density and osteoporosis in Puerto Rican adults.","authors":"Liam E Fouhy, Kelsey M Mangano, Xiyuan Zhang, Bess Dawson-Hughes, David J Cornell, Katherine L Tucker, Sabrina E Noel","doi":"10.1093/jbmr/zjaf016","DOIUrl":"10.1093/jbmr/zjaf016","url":null,"abstract":"<p><p>Chronic stress leads to elevated stress hormones, which may be linked to bone breakdown. Puerto Rican adults living on the US mainland have higher prevalence of stress than the general population, and higher and/or similar prevalence of osteoporosis compared with non-Hispanic Whites. The role of stress on bone remains unclear and may be modified by diet. A Dietary Approaches to Stop Hypertension (DASH) pattern, as a measure of dietary quality, was most protective for bone outcomes among Puerto Ricans. In this cross-sectional study, 958 Boston Puerto Rican Health Study participants were included (aged: 59.9 ± 7.6 yr). Stress markers (epinephrine, norepinephrine, cortisol) were collected via 12-h urine samples and elevated concentrations were categorized using sex-specific cutoffs. BMD was assessed via DXA. Analysis of covariance models with least squares means were used to test differences in mean BMD between participants with elevated and non-elevated stress markers. Multivariable logistic regression examined associations between stress markers and osteoporosis in postmenopausal females and males. Models were adjusted for age, height, smoking, alcohol use, education, glucocorticoid use, and diabetes. Higher urinary epinephrine was associated with lower BMD at the LS (p = .012), FN (p = .005), trochanter (p < .001), and TH (p < .001) in Puerto Rican adults, and with higher odds of osteoporosis among males (odds ratio = 4.01 [95%CI: 1.11, 14.5], p = .03). An interaction between DASH and norepinephrine was noted for postmenopausal females at the LS. No associations were noted for norepinephrine or cortisol (p > .11), although higher urinary norepinephrine was associated with lower LS BMD in postmenopausal females not taking estrogen, with lower adherence to DASH (p = .03). Higher urinary epinephrine and norepinephrine were associated with poorer bone outcomes in Puerto Rican adults, in a sex-specific manner, warranting future longitudinal studies to clarify associations. Dietary quality may moderate these associations.</p>","PeriodicalId":185,"journal":{"name":"Journal of Bone and Mineral Research","volume":" ","pages":"500-510"},"PeriodicalIF":5.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143072957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Elizabeth A Zimmermann, Louis-Nicolas Veilleux, Marianne Gagnon, Dominique Audet, Rita Yap, Catherine Julien, Seyedmahdi Hosseinitabatabaei, Eliane Rioux Trottier, Bettina M Willie, Alessandra Carriero, Jean-Pierre Farmer
{"title":"Ambulatory children with spastic cerebral palsy have smaller bone area and deficits in trabecular microarchitecture.","authors":"Elizabeth A Zimmermann, Louis-Nicolas Veilleux, Marianne Gagnon, Dominique Audet, Rita Yap, Catherine Julien, Seyedmahdi Hosseinitabatabaei, Eliane Rioux Trottier, Bettina M Willie, Alessandra Carriero, Jean-Pierre Farmer","doi":"10.1093/jbmr/zjaf026","DOIUrl":"10.1093/jbmr/zjaf026","url":null,"abstract":"<p><p>Cerebral palsy (CP) is a non-progressive neurological syndrome resulting in abnormal muscle tone, movement, and posture. It is unclear whether ambulatory children with CP have deficits in bone quantity or quality. Furthermore, the relationship between abnormal muscle tone, altered function, and bone health remains largely unexplored. This observational study investigated bone mineral density (BMD) and microarchitecture in ambulatory children with spastic CP and associations of BMD with function, muscle spasticity, and gait. Children with spasticity in both lower limbs (n = 12) aged 3-8 years were recruited. Areal BMD was measured with dual energy x-ray absorptiometry (DXA) at the proximal femur and lateral distal femur and compared to normative data. High resolution peripheral quantitative computed tomography (HR-pQCT) was performed at the metaphyseal tibia and radius in a subset of participants (n = 5) and compared to healthy children (n = 7). Gait pathology and cardiopulmonary function were investigated with the Gait Deviation Index, Edinburgh Visual Gait Score, and energy expenditure index. DXA areal BMD (aBMD) Z-scores at the lateral distal femur were within a normal range. However, the CP group's median aBMD Z-score at the proximal femur was -1.8 (IQR: -2.2, -1.2, p = .03) indicating potential skeletal fragility. Strong correlations were found between gait pathology and DXA-based bone outcomes (correlation coefficient 0.62 [p = .04] to 0.73 [p = .01]) as well as energy expenditure index and DXA-based bone outcomes (correlation coefficient -0.63 [p = .03] to -0.98 [p ≤ .001]). At the metaphyseal tibia, children with spastic CP had significant deficits in HR-pQCT-measured bone geometry and trabecular microarchitecture: 35% lower total area, 42% lower trabecular area, and 48% lower trabecular number than controls. HR-pQCT parameters were similar between groups at the metaphyseal radius. These differences in tibial metaphysis size and trabecular microarchitecture are similar to those observed in disuse and thus could be a result of abnormal biomechanics or low levels of physical activity.</p>","PeriodicalId":185,"journal":{"name":"Journal of Bone and Mineral Research","volume":" ","pages":"511-521"},"PeriodicalIF":5.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12010165/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143381357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Correction to: Setrusumab for the treatment of osteogenesis imperfecta: 12-month results from the phase 2b asteroid study.","authors":"","doi":"10.1093/jbmr/zjaf031","DOIUrl":"10.1093/jbmr/zjaf031","url":null,"abstract":"","PeriodicalId":185,"journal":{"name":"Journal of Bone and Mineral Research","volume":" ","pages":"561"},"PeriodicalIF":5.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12010154/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143555469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}