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Wu Q, Dai J. Racial/Ethnic Differences in Bone Mineral Density for Osteoporosis. Curr Osteoporos Rep 2023; 21:670-684. [PMID: 38019343 DOI: 10.1007/s11914-023-00838-y] [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: 11/13/2023] [Indexed: 11/30/2023]
Abstract
PURPOSE OF REVIEW We primarily aim to review differences in bone mineral density (BMD) for osteoporosis among different racial/ethnic groups and to highlight the magnitude of racial/ethnic differences in obesity and diabetes. We also explore the factors contributing to the BMD differences among various subgroups. In addition, we investigate the existing disparities in research, educational initiatives, screening practices, and treatment options for osteoporosis and discuss these findings' clinical and public health implications. RECENT FINDINGS Racial/ethnic differences in BMD for osteoporosis exist in the USA and other countries. There are disparities regarding osteoporosis screening and treatment. Understanding the factors contributing to these differences can help develop targeted interventions and policies to reduce their impact. Clinicians should consider the racial/ethnic differences in BMD when making treatment decisions and providing preventive care. Future research could contribute to developing effective strategies for preventing osteoporosis among different racial/ethnic groups. This review offered a comprehensive examination of differences in BMD across various racial and ethnic groups, elucidating the influence of genetic, lifestyle, and cultural factors on these differences. This review also highlighted the disparities in osteoporosis screening, treatment options, research on medical effectiveness, and educational outreach tailored to each subgroup. Recognizing the importance of addressing these inequalities, we present this review to advocate for targeted interventions to reduce disparities in osteoporosis and improve bone health for all populations.
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Affiliation(s)
- Qing Wu
- Department of Biomedical Informatics, College of Medicine, The Ohio State University, 250 Lincoln Tower, 1800 Cannon Drive, Columbus, OH, 43210, USA.
| | - Jingyuan Dai
- Department of Biomedical Informatics, College of Medicine, The Ohio State University, 250 Lincoln Tower, 1800 Cannon Drive, Columbus, OH, 43210, USA
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Quantitative evaluation of correlation between lumbosacral lordosis and pelvic incidence in standing position among asymptomatic Asian adults: a prospective study. Sci Rep 2022; 12:18965. [PMID: 36347920 PMCID: PMC9643535 DOI: 10.1038/s41598-022-21840-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 10/04/2022] [Indexed: 11/11/2022] Open
Abstract
The determination of lumbopelvic alignment is essential for planning adult spinal deformity surgery and for ensuring favorable surgical outcomes. This prospective study investigated the correlation between the lumbar section of lumbar spine lordosis and increasing pelvic incidence in 324 Asian adults with a mean age of 55 ± 13 years (range: 20-80 years), comprising 115 male and 209 female volunteers. Participants were divided into three groups based on pelvic incidence (G1, G2, and G3 had pelvic incidence of < 45°, 45-55°, and ≥ 55°, respectively). We determined that distal and proximal lumbar lordosis contributed differentially to the increase in pelvic incidence, whereas the lordosis ratio of the L3-L4 and L4-L5 segments mostly remained constant. The mean contribution ratio of the segmental lordosis from L1 to S1 was as follows: L1-L2, 2.3%; L2-L3, 11.7%; L3-L4, 18.1%; L4-L5, 25.2%; and L5-S1, 42.7%. Pelvic incidence had a stronger correlation with proximal lumbar lordosis than did distal lumbar lordosis. The ratios of proximal lumbar lordosis to distal lumbar lordosis were 37.8% in G1, 45.8% in G2, and 55.9% in G3. These findings serve as a reference for future lumbar spine correction or fusion surgery for Asian adults.
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Noel SE, Santos MP, Wright NC. Racial and Ethnic Disparities in Bone Health and Outcomes in the United States. J Bone Miner Res 2021; 36:1881-1905. [PMID: 34338355 PMCID: PMC8607440 DOI: 10.1002/jbmr.4417] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 07/12/2021] [Accepted: 07/21/2021] [Indexed: 11/10/2022]
Abstract
Osteoporosis is a bone disease classified by deterioration of bone microarchitecture and decreased bone strength, thereby increasing subsequent risk of fracture. In the United States, approximately 54 million adults aged 50 years and older have osteoporosis or are at risk due to low bone mass. Osteoporosis has long been viewed as a chronic health condition affecting primarily non-Hispanic white (NHW) women; however, emerging evidence indicates racial and ethnic disparities in bone outcomes and osteoporosis management. The primary objective of this review is to describe disparities in bone mineral density (BMD), prevalence of osteoporosis and fracture, as well as in screening and treatment of osteoporosis among non-Hispanic black (NHB), Hispanic, and Asian adults compared with NHW adults living on the US mainland. The following areas were reviewed: BMD, osteoporosis prevalence, fracture prevalence and incidence, postfracture outcomes, DXA screening, and osteoporosis treatments. Although there are limited studies on bone and fracture outcomes within Asian and Hispanic populations, findings suggest that there are differences in bone outcomes across NHW, NHB, Asian, and Hispanic populations. Further, NHB, Asian, and Hispanic populations may experience suboptimal osteoporosis management and postfracture care, although additional population-based studies are needed. There is also evidence that variation in BMD and osteoporosis exists within major racial and ethnic groups, highlighting the need for research in individual groups by origin or background. Although there is a clear need to prioritize future quantitative and qualitative research in these populations, initial strategies for addressing bone health disparities are discussed. © 2021 American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Sabrina E Noel
- Department of Biomedical and Nutritional Sciences, University of Massachusetts Lowell, Lowell, MA, USA.,Center for Population Health, University of Massachusetts Lowell, Lowell, MA, USA
| | - Michelly P Santos
- Department of Biomedical and Nutritional Sciences, University of Massachusetts Lowell, Lowell, MA, USA.,Center for Population Health, University of Massachusetts Lowell, Lowell, MA, USA
| | - Nicole C Wright
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, AL, USA
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Ning H, Du Y, Zhao LJ, Tian Q, Feng H, Deng HW. The mediating effect of skeletal muscle index on the relationship between menarcheal age and bone mineral density in premenopausal women by race/ethnicity. Menopause 2021; 28:1143-1149. [PMID: 34313616 PMCID: PMC8514157 DOI: 10.1097/gme.0000000000001814] [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] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To examine the contribution of skeletal mass index (SMI) as a mediator in the relationship between menarcheal age and hip/spine bone mineral density (BMD) in premenopausal women by race/ethnicity. METHODS The data of 4,329 participants (age ≥ 18; mean age=35.7 ± 9.5) of Whites (n = 2,543), African Americans (n = 1,236), and Asians (n = 550) enrolled from October 2011 to January 2019 from the Louisiana Osteoporosis Study were analyzed. After adjustment for physiological and behavioral factors, multivariable linear regression analyses were conducted to evaluate each component of the proposed mediation models, and mediation was verified by the bootstrapping resampling approach. RESULTS Premenopausal women with early menarcheal age tended to have higher SMI and BMD than women with normal menarcheal age among all races/ethnicities included. Women with late menarcheal age were, however, more likely to have a lower SMI than their counterparts with normal menarcheal age (r = -0.212, 95% CI = [-0.321 to -0.103] for White women; r = -0.181, 95% CI = [-0.410 to -0.008] for African-American women; r = -0.174, 95% CI = [-0.343 to -0.006] for Asian women). Similar results were found for both spine and hip BMD. SMI fully mediated the difference in BMD due to different menarcheal ages among Whites, African Americans, and Asian women with early menarcheal age; however, no mediating effects were observed for Asian women with late menarcheal age. CONCLUSIONS SMI, as a full mediator, affected the relationship between menarcheal age and BMD among premenopausal women, and the mediating effects varied by race/ethnicity. To prevent or slow down the loss of hip/spine BMD and the development of osteoporosis, measures aiming at minimizing the risk for muscle mass loss should be recommended, especially for White and African-American women with late menarcheal age.
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Affiliation(s)
- Hongting Ning
- Xiangya School of Nursing, Central South University, Changsha, Hunan, China
| | - Yan Du
- School of Nursing, University of Texas Health Science Center at San Antonio, San Antonio, TX
| | - Lan-Juan Zhao
- Center for Bioinformatics and Genomics, Department of Biostatistics, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA
| | - Qing Tian
- Center for Bioinformatics and Genomics, Department of Biostatistics, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA
| | - Hui Feng
- Xiangya School of Nursing, Xiangya-Oceanwide Health Management Research Institute, Central South University, Changsha, Hunan, China
| | - Hong-Wen Deng
- School of Medicine, Tulane University, New Orleans, LA
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Bredella MA, Singhal V, Hazhir Karzar N, Animashaun A, Bose A, Stanford FC, Carmine B, Misra M. Racial differences in lumbar marrow adipose tissue and volumetric bone mineral density in adolescents and young adults with obesity. Bone Rep 2020; 13:100726. [PMID: 33392365 PMCID: PMC7772680 DOI: 10.1016/j.bonr.2020.100726] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 10/05/2020] [Accepted: 10/09/2020] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Areal bone mineral density (BMD) of the lumbar spine by DXA is greater in Black compared to White adolescents. Bone strength is determined not only by BMD but also its microenvironment, and marrow adipose tissue (MAT) has been shown to be an important determinant of skeletal integrity, independent of BMD. Racial differences in volumetric BMD (vBMD) and MAT in adolescents and young adults with obesity are unknown. OBJECTIVE To assess racial differences in lumbar vBMD and MAT in Black and White adolescents and young adults with obesity and to assess body composition determinants of bone parameters. We hypothesized that Blacks will have higher vBMD and lower MAT of the lumbar spine compared to Whites. METHODS The study group comprised 77 adolescents/young adults, 25 Black and 52 White, (mean age 18.2 ± 2.5 years, range 13 to 24 years) with moderate to severe obesity (mean body mass index (BMI) 46.2 ± 7.3 kg/m2, range 35.5 to 69.7 kg/m2). Groups were similar in age, BMI, and sex distribution (p > 0.84). Subjects underwent QCT of the lumbar spine (L1-L2) for assessment of vBMD with the use of a calibration phantom and 1H-MRS/MRI for quantification of lumbar MAT content (L1-L2) and abdominal fat and thigh muscle mass. Groups were compared by Student's t-test or Wilcoxon test. Correlation analysis was performed to assess associations between bone parameters and body composition. RESULTS Black adolescents/young adults with obesity had higher vBMD compared to Whites (p < 0.0001), while there was no significant difference in lumbar MAT (p = 0.64). There were also no significant differences in body composition measures between groups (p ≥ 0.28). An inverse association between MAT and vBMD was observed in Whites (r = -0.47, P = 0.001) but not in Blacks (p = 0.6). There were no significant associations between body composition measures and bone parameters (p > 0.1). CONCLUSION There are racial differences in lumbar vBMD in adolescents and young adults with moderate to severe obesity, with Blacks having higher vBMD than Whites, while there were no differences in MAT content. The known inverse association between BMD and MAT was only observed in Whites but not in Blacks, suggesting possible racial differences in stem cell differentiation into the bone and fat lineages.
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Affiliation(s)
- Miriam A. Bredella
- Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States of America
| | - Vibha Singhal
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States of America
- Division of Pediatric Endocrinology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States of America
- MGH Weight Center, Boston, MA, United States of America
| | - Nazanin Hazhir Karzar
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States of America
| | - Abisayo Animashaun
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States of America
| | - Amita Bose
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States of America
| | - Fatima Cody Stanford
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States of America
- MGH Weight Center, Boston, MA, United States of America
| | - Brian Carmine
- Department of Surgery, Boston University Medical Center, Boston, MA, United States of America
| | - Madhusmita Misra
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States of America
- Division of Pediatric Endocrinology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States of America
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Campoverde Reyes KJ, Stanford FC, Singhal V, Animashaun AO, Bose A, Gleeson EL, Bredella MA, Misra M. Bone density, microarchitecture and strength estimates in white versus African American youth with obesity. Bone 2020; 138:115514. [PMID: 32622072 PMCID: PMC7423738 DOI: 10.1016/j.bone.2020.115514] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 06/26/2020] [Accepted: 06/27/2020] [Indexed: 01/06/2023]
Abstract
BACKGROUND African Americans (AA) have more favorable bone density and microarchitecture compared to Whites (W), which may explain their observed lower fracture rates. Obesity has deleterious effects on bone microarchitecture and strength estimates and is associated with an increase in fracture risk. Adolescence and young adulthood are periods of active bone accrual and also periods characterized by an increasing prevalence of obesity. The effect of obesity on the relationship between race and bone parameters remains unclear, particularly in youth. OBJECTIVE To assess differences in BMD, bone microarchitecture and strength estimates in AA and W adolescents and young adults with moderate to severe obesity. We hypothesized that racial differences in bone endpoints in lean youth would also be noted in youth with moderate to severe obesity. METHODS We evaluated 24 AA and 48 W adolescent and young adults with a mean age of 18.2 ± 2.4 years and a median body mass index (BMI) of 44.8 (40.5-49.4) kg/m2 who underwent dual energy X-ray absorptiometry (DXA), high resolution peripheral quantitative computed tomography (HRpQCT), extended cortical analysis (ECA) and micro-finite element analysis (FEA) to obtain measures of volumetric bone mineral density (vBMD), bone geometry, microarchitecture, and strength estimates at the distal radius and tibia. RESULTS We found no differences between AA and W for total fat and lean mass, and areal BMD Z-scores (p > 0.05 for all). At the distal radius, no significant differences were detected in vBMD, bone geometry or microarchitecture (p > 0.05 for all); however, stiffness and failure load were higher in the AA group (p = 0.031 and 0.047 respectively). At the distal tibia, cortical vBMD was higher in AA vs. W (p = 0.012), while trabecular number was higher and trabecular separation lower in W vs. AA (p ≤ 0.028). Stiffness and failure load trended higher in AA vs. W (p = 0.052 and p = 0.048, respectively). Groups did not differ for any other bone parameter (p > 0.05). CONCLUSION Racial differences in bone endpoints appear to be less marked in those with moderate to severe obesity, suggesting that effects of obesity may blunt the effect of race on bone endpoints.
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Affiliation(s)
- Karen J Campoverde Reyes
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States of America; Liver Research Center, Beth Israel Deaconess Medical Center, Boston, MA, United States of America
| | - Fatima Cody Stanford
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States of America; Division of Pediatric Endocrinology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States of America; MGH Weight Center, Massachusetts General Hospital, Boston, MA, United States of America.
| | - Vibha Singhal
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States of America; Division of Pediatric Endocrinology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States of America; MGH Weight Center, Massachusetts General Hospital, Boston, MA, United States of America
| | - Abisayo O Animashaun
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States of America
| | - Amita Bose
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States of America
| | - Elizabeth L Gleeson
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States of America
| | - Miriam A Bredella
- Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States of America
| | - Madhusmita Misra
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States of America; Division of Pediatric Endocrinology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States of America
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Cardiovascular Risk Factors Following Vertical Sleeve Gastrectomy in Black Americans Compared with White Americans. Obes Surg 2020; 31:1004-1012. [PMID: 32827094 PMCID: PMC7897752 DOI: 10.1007/s11695-020-04938-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 08/16/2020] [Accepted: 08/17/2020] [Indexed: 12/20/2022]
Abstract
OBJECTIVE Bariatric surgery presents a long-term solution for clinical obesity. Given that Black Americans (BA) carry a greater burden of obesity-related comorbidities than White Americans (WA), understanding the racial disparities regarding remission of obesity comorbidities following the most common bariatric surgery, sleeve gastrectomy (SG). The goal of the current study was to provide quantitative values related to cardiovascular and lipid outcomes following SG and determine if racial disparities exist between BA and WA. METHODS Data was collected from de-identified electronic medical records for patients receiving SG surgery at the University of Mississippi Medical Center in Jackson, MS, USA. RESULTS Of 464 patients who obtained SG from (2013-2019), 64% were WA, and 36% were BA. Before surgery, BA had significantly greater body weight (BW), body mass index (BMI), and systolic (SBP) and diastolic (DBP) blood pressures (BP) in comparison with WA. Compared with WA, BA were predicted to lose 5.1 kg less BW than WA at 1-year follow-up. Reduction in SBP (- 0.96 vs. - 0.60 mmHg/doubling of days) and DBP (- 0.51 vs. - 0.26 mmHg/doubling of days) was significantly higher in WA compared with BA. There was no racial difference in the change to total cholesterol, high-density lipoprotein (HDL)-cholesterol, low-density lipoprotein (LDL)-cholesterol, or triglycerides by race. When normalized to weight loss, the racial disparity in BP reduction was mitigated. CONCLUSIONS These data indicate that BA lose less body weight following SG; however, loss of excess body weight loss is associated with improvement to BP similarly in both BA and WA.
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Singhal V, Sanchita S, Malhotra S, Bose A, Flores LPT, Valera R, Stanford FC, Slattery M, Rosenblum J, Goldstein MA, Schorr M, Ackerman KE, Miller KK, Klibanski A, Bredella MA, Misra M. Suboptimal bone microarchitecure in adolescent girls with obesity compared to normal-weight controls and girls with anorexia nervosa. Bone 2019; 122:246-253. [PMID: 30853658 PMCID: PMC6636859 DOI: 10.1016/j.bone.2019.03.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 03/05/2019] [Accepted: 03/06/2019] [Indexed: 12/13/2022]
Abstract
BACKGROUND Despite their higher areal bone mineral density (aBMD), adolescents with obesity (OB) have an increase in fracture risk, particularly of the extremities, compared with normal-weight controls. Whereas bone parameters that increase fracture risk are well characterized in anorexia nervosa (AN), the other end of nutritional spectrum, these data are lacking in adolescents with obesity. OBJECTIVE Our objective was to compare bone parameters in adolescent girls across the nutritional spectrum, to determine whether suboptimal bone adaptation to increased body weight may explain the increased fracture risk in OB. METHODS We assessed bone endpoints in 153 adolescent girls 14-21 years old: 50 OB, 48 controls and 55 AN. We used (i) DXA to assess aBMD at the lumbar spine, proximal femur and whole body, and body composition, (ii) high resolution peripheral quantitative CT (HRpQCT) to assess bone geometry, microarchitecture and volumetric BMD (vBMD), and (iii) finite element analysis to assess failure load (a strength estimate) at the distal radius and tibia. All aBMD, microarchitecture and FEA analyses were controlled for age and race. RESULTS Groups did not differ for age or height. Areal BMD Z-scores at all sites were highest in OB, intermediate in controls and lowest in AN (p < 0.0001). At the radius, cortical area and thickness were higher in OB compared to AN and control groups (p = 0.001) while trabecular area did not differ across groups. Compared to controls, OB had higher cortical porosity (p = 0.003), higher trabecular thickness (p = 0.024), and higher total, cortical and trabecular vBMD and rod BV/TV (p < 0.04). Plate BV/TV did not differ in OB vs. controls, but was higher than in AN (p = 0.001). At the tibia, total, cortical, and trabecular area and cortical thickness were higher in OB vs. controls and AN (p < 0.005). OB also had higher cortical porosity (p < 0.007) and lower trabecular thickness (p < 0.02) than the other two groups. Trabecular number, total and trabecular vBMD, and rod BV/TV were higher in OB vs. controls and AN (p < 0.02), while cortical vBMD and plate BV/TV did not differ in OB vs. the other two groups. Finally, failure load (a strength estimate) was higher in OB at the radius and tibia compared to controls and AN (p < 0.004 for all). However, after adjusting for body weight, failure load was lower in OB vs. controls at both sites (p < 0.05), and lower than in AN at the distal tibia. CONCLUSION Not all bone parameters demonstrate appropriate adaptation to higher body weight. Cortical porosity and plate BV/TV at the radius and tibia, and cortical vBMD and trabecular thickness at the tibia are particularly at risk. These effects may contribute to the higher risk for fracture reported in OB vs. controls.
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Affiliation(s)
- Vibha Singhal
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, United States of America; Division of Pediatric Endocrinology, Massachusetts General Hospital for Children, Harvard Medical School, United States of America; MGH Weight Center, United States of America.
| | - Smriti Sanchita
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, United States of America
| | - Sonali Malhotra
- Division of Pediatric Endocrinology, Massachusetts General Hospital for Children, Harvard Medical School, United States of America
| | - Amita Bose
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, United States of America
| | - Landy Paola Torre Flores
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, United States of America
| | - Ruben Valera
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, United States of America
| | - Fatima Cody Stanford
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, United States of America; MGH Weight Center, United States of America
| | - Meghan Slattery
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, United States of America
| | - Jennifer Rosenblum
- Division of Adolescent Medicine, Massachusetts General Hospital for Children, Harvard Medical School, United States of America
| | - Mark A Goldstein
- Division of Adolescent Medicine, Massachusetts General Hospital for Children, Harvard Medical School, United States of America
| | - Melanie Schorr
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, United States of America
| | - Kathryn E Ackerman
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, United States of America; Divison of Sports Medicine, Boston Children's Hospital, Harvard Medical School, United States of America
| | - Karen K Miller
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, United States of America
| | - Anne Klibanski
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, United States of America
| | - Miriam A Bredella
- Department of Radiology, Massachusetts General Hospital, Harvard Medical School, United States of America
| | - Madhusmita Misra
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, United States of America; Division of Pediatric Endocrinology, Massachusetts General Hospital for Children, Harvard Medical School, United States of America
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Singhal V, Reyes KC, Pfister B, Ackerman K, Slattery M, Cooper K, Toth A, Gupta N, Goldstein M, Eddy K, Misra M. Bone accrual in oligo-amenorrheic athletes, eumenorrheic athletes and non-athletes. Bone 2019; 120:305-313. [PMID: 29758361 PMCID: PMC6636860 DOI: 10.1016/j.bone.2018.05.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 04/26/2018] [Accepted: 05/09/2018] [Indexed: 11/23/2022]
Abstract
BACKGROUND Mechanical loading improves bone mineral density (BMD) and strength while decreasing fracture risk. Cross-sectional studies show that exercise advantage is lost in oligo-amenorrheic athletes (OA). Longitudinal studies examining the opposing effects of exercise and hypogonadism on bone are lacking in adolescents/young adults. OBJECTIVE Evaluate differences in bone accrual over 12 months in OA, eumenorrheic athletes (EA) and non-athletes (NA). We hypothesized that bone accrual would be lower in OA than EA and NA, with differences most pronounced at non-weight bearing trabecular sites. METHODS 27 OA, 29 EA, and 22 NA, 14-25 years old, completed 12-months of the prospective study. Athletes were weight-bearing endurance athletes. Subjects were assessed for areal BMD and bone mineral content (BMC) using DXA at the femoral neck, total hip, lumbar spine and whole body (WB). Failure load (a strength estimate) at the distal radius and tibia was assessed using microfinite element analysis of data obtained via high resolution peripheral quantitative computed tomography (HRpQCT). The primary analysis was a comparison of changes in areal BMD, BMC, and failure load across groups over 12-months at the respective sites. RESULTS Groups did not differ for baseline age, height or BMI. Percent body fat was lower in both OA and EA compared to NA. OA attained menarche later than EA and NA. Over the follow-up period, OA gained 1.9 ± 2.7 kg of weight compared to 0.5 ± 2.4 kg and 0.8 ± 2.3 kg in EA and NA respectively (p = 0.09); 39% of OA resumed menses. Changes in BMD, BMD Z-scores, and tibial failure load over 12-months did not differ among groups. At follow up, EA had higher femoral neck, hip and WB BMD Z-scores than NA, and higher hip BMD Z-scores than OA (p < 0.05) after adjusting for covariates. At follow-up, radial failure load was lower in OA vs. NA, and tibial failure load lower in OA and NA vs. EA (p ≤ 0.04 for all). Change in weight and fat mass were associated with changes in BMD measures at multiple sites. CONCLUSION Despite weight gain and menses recovery in many OA during follow-up, residual deficits persist without catch-up raising concerns for suboptimal peak bone mass acquisition.
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Affiliation(s)
- Vibha Singhal
- Neuroendocrine Unit, Massachusetts General Hospital, Harvard Medical School, United States; Pediatric Endocrine Unit, Massachusetts General Hospital, Harvard Medical School, United States.
| | - Karen Campoverde Reyes
- Neuroendocrine Unit, Massachusetts General Hospital, Harvard Medical School, United States
| | - Brooke Pfister
- Neuroendocrine Unit, Massachusetts General Hospital, Harvard Medical School, United States
| | - Kathryn Ackerman
- Neuroendocrine Unit, Massachusetts General Hospital, Harvard Medical School, United States; Division of Sports Medicine, Boston Children's Hospital, Harvard Medical School, United States
| | - Meghan Slattery
- Neuroendocrine Unit, Massachusetts General Hospital, Harvard Medical School, United States
| | - Katherine Cooper
- Neuroendocrine Unit, Massachusetts General Hospital, Harvard Medical School, United States
| | - Alexander Toth
- Neuroendocrine Unit, Massachusetts General Hospital, Harvard Medical School, United States
| | - Nupur Gupta
- Division of Adolescent and Young Adult Medicine, Massachusetts General Hospital, Harvard Medical School, United States
| | - Mark Goldstein
- Division of Adolescent and Young Adult Medicine, Massachusetts General Hospital, Harvard Medical School, United States
| | - Kamryn Eddy
- Eating Disorders Clinical and Research Program, Massachusetts General Hospital, Harvard Medical School, United States
| | - Madhusmita Misra
- Neuroendocrine Unit, Massachusetts General Hospital, Harvard Medical School, United States; Pediatric Endocrine Unit, Massachusetts General Hospital, Harvard Medical School, United States
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Kawalilak CE, Bunyamin AT, Björkman KM, Johnston JD, Kontulainen SA. Precision of bone density and micro-architectural properties at the distal radius and tibia in children: an HR-pQCT study. Osteoporos Int 2017; 28:3189-3197. [PMID: 28921128 DOI: 10.1007/s00198-017-4185-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Accepted: 07/31/2017] [Indexed: 12/18/2022]
Abstract
UNLABELLED Precision errors need to be known when monitoring bone micro-architecture in children with HR-pQCT. Precision errors for trabecular bone micro-architecture ranged from 1 to 8% when using the standard evaluation at the radius and tibia. Precision errors for cortical bone micro-architecture ranged from 1 to 11% when using the advanced cortical evaluation. INTRODUCTION Our objective was to define HR-pQCT precision errors (CV%RMS) and least significant changes (LSCs) at the distal radius and tibia in children using the standard evaluation and the advanced cortical evaluation. METHODS We scanned the distal radius (7% of ulnar length) and tibia (8% of tibia length) of 32 children (age range 8-13; mean age 11.3; SD 1.6 years) twice (1 week apart) using HR-pQCT (XtremeCT1). We calculated root-mean-squared coefficients of variation (CV%RMS) to define precision errors and LSC to identify differences required to detect change. RESULTS Precision errors ranged between 1-8 and 1-5% for trabecular bone outcomes (obtained with standard evaluation) and between 1.5-11 and 0.5-6% for cortical bone outcomes (obtained with advanced cortical evaluation) at the distal radius and tibia, respectively. Related LSCs ranged between 3-21 and 3-14% for trabecular bone outcomes and between 4-30 and 2-16% for cortical bone outcomes at the distal radius and tibia, respectively. CONCLUSIONS HR-pQCT precision errors were between 1 and 8% (LSC 3-21%) for trabecular bone outcomes and 1 and 11% (LSC 2-30%) for cortical bone outcomes at the radius and tibia in children. Cortical bone outcomes obtained using the advanced cortical evaluation appeared to have lower precision errors than cortical outcomes derived using the standard evaluation. These findings, combined with better-defined cortical bone contours with advanced cortical evaluation, indicate that metrics from advanced cortical evaluation should be utilized when monitoring cortical bone properties in children.
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Affiliation(s)
- C E Kawalilak
- Department of Mechanical Engineering, College of Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK, S7N 5A9, Canada
| | - A T Bunyamin
- Department of Mechanical Engineering, College of Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK, S7N 5A9, Canada
| | - K M Björkman
- College of Kinesiology, University of Saskatchewan, 87 Campus Drive, Saskatoon, SK, S7N 5B2, Canada
| | - J D Johnston
- Department of Mechanical Engineering, College of Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK, S7N 5A9, Canada
| | - S A Kontulainen
- College of Kinesiology, University of Saskatchewan, 87 Campus Drive, Saskatoon, SK, S7N 5B2, Canada.
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11
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Zhang L, Sugamori KS, Claridge C, Dela Cruz A, Grynpas MD, Mitchell J. Overexpression of Gα S in Murine Osteoblasts In Vivo Leads to Increased Bone Mass and Decreased Bone Quality. J Bone Miner Res 2017; 32:2171-2181. [PMID: 28727179 DOI: 10.1002/jbmr.3223] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2017] [Revised: 07/11/2017] [Accepted: 07/19/2017] [Indexed: 11/10/2022]
Abstract
GαS is a heterotrimeric G protein that transduces signals from activated G protein-coupled receptors on the cell surface to stimulate adenylyl cyclase/cyclic adenosine monophosphate (AMP) signaling. GαS plays a central role in mediating numerous growth and maintenance processes including osteogenesis and bone turnover. Decreased GαS expression or activating mutations in GαS both affect bone, suggesting that modulating GαS protein levels may be important for bone health and development. To examine the effects of increased osteoblastic GαS expression on bone development in vivo, we generated transgenic mice with GαS overexpression in osteoblasts (HOM-Gs mice) driven by the 3.6-kilobase (kb) Col1A1 promoter. Both male and female HOM-Gs mice exhibit increased bone turnover with overactive osteoblasts and osteoclasts, resulting in a high bone mass phenotype with significantly reduced bone quality. At 9 weeks of age, HOM-Gs mice have increased trabecular number, volumetric BMD (vBMD), and bone volume; however, the bone was woven and disorganized. There was also increased cortical bone volume despite an overall reduction in size in HOM-Gs mice along with increased cortical porosity and brittleness. The skeletal phenotype of HOM-Gs mice progressed into maturity at 26 weeks of age with further accrual of trabecular bone, whereas WT mice lost trabecular bone at this age. Although cortical bone volume and geometry were similar between mature HOM-Gs and WT mice, increased porosity persisted and the bone was weaker. At the cellular level, these alterations were mediated by an increase in bone resorption by osteoclasts and an overwhelmingly higher increase in bone formation by osteoblasts. In summary, our findings demonstrate that high osteoblastic GαS expression results in aberrant skeletal development in which bone production is favored at the cost of bone quality. © 2017 American Society for Bone and Mineral Research.
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Affiliation(s)
- Lucia Zhang
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, Ontario, Canada.,Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada
| | - Kim S Sugamori
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, Ontario, Canada
| | - Colin Claridge
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, Ontario, Canada
| | - Ariana Dela Cruz
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, Ontario, Canada
| | - Marc D Grynpas
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada
| | - Jane Mitchell
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, Ontario, Canada
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12
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Kandemir N, Becker K, Slattery M, Tulsiani S, Singhal V, Thomas JJ, Coniglio K, Lee H, Miller KK, Eddy KT, Klibanski A, Misra M. Impact of low-weight severity and menstrual status on bone in adolescent girls with anorexia nervosa. Int J Eat Disord 2017; 50:359-369. [PMID: 28152193 PMCID: PMC5386816 DOI: 10.1002/eat.22681] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 12/13/2016] [Accepted: 01/01/2017] [Indexed: 12/16/2022]
Abstract
Clinicians currently use different low-weight cut-offs both to diagnose anorexia nervosa (AN) and to determine AN severity in adolescent girls. The purpose of this study was to evaluate the clinical utility of existing cut-offs and severity criteria by determining which are most strongly associated with risk for low bone mineral density (BMD). Height adjusted BMD Z scores were calculated for 352 females: 262 with AN and 90 healthy controls (controls) (12-20.5 years), using data from the BMD in Childhood Study, for the lumbar spine, whole body less head, and total hip. For most cut-offs used to define low weight (5th or 10th BMI percentile, BMI of 17.5 or 18.5, and 85 or 90% of median BMI), AN had lower BMD Z scores than controls. AN at >85 or >90% expected body weight for height (EBW-Ht) did not differ in BMD Z scores from controls, but differed significantly from AN at ≤85 or ≤90% EBW-Ht. Among AN, any amenorrhea was associated with lower BMD. AN had lower BMD than controls across DSM-5 and The Society for Adolescent Health and Medicine (SAHM) severity categories. The SAHM moderate severity classification was differentiated from the mildly malnourished classification by lower BMD at hip and spine sites. Amenorrhea and %EBW-Ht ≤ 85 or ≤ 90% are markers of severity of bone loss within AN. Among severity categories, BMI Z scores (SAHM) may have the greatest utility in assessing the degree of malnutrition in adolescent girls that corresponds to lower BMD.
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Affiliation(s)
- Nurgun Kandemir
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA,Pediatric Endocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Kendra Becker
- Eating Disorders Clinical and Research Program, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Meghan Slattery
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Shreya Tulsiani
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Vibha Singhal
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA,Pediatric Endocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Jennifer J. Thomas
- Eating Disorders Clinical and Research Program, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Kathryn Coniglio
- Eating Disorders Clinical and Research Program, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Hang Lee
- MGH Biostatistics Center, Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Karen K. Miller
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Kamryn T. Eddy
- Eating Disorders Clinical and Research Program, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Anne Klibanski
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Madhusmita Misra
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA,Pediatric Endocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA
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