bone mass density
Recently Published Documents


TOTAL DOCUMENTS

226
(FIVE YEARS 81)

H-INDEX

22
(FIVE YEARS 2)

F1000Research ◽  
2022 ◽  
Vol 11 ◽  
pp. 8
Author(s):  
Anja Roth ◽  
Martin Sattelmayer ◽  
Chloé Schorderet ◽  
Simone Gafner ◽  
Lara Allet

Background: After a diet- or surgery induced weight loss almost 1/3 of lost weight consists of fat free mass (FFM) if carried out without additional therapy. Exercise training and a sufficient supply of protein, calcium and vitamin D is recommended to reduce the loss of FFM. Objective: To investigate the effect of exercise training, protein, calcium, and vitamin D supplementation on the preservation of FFM during non-surgical and surgical weight loss and of the combination of all interventions together in adults with obesity. Methods: A systematic review was performed with a pairwise meta-analysis and an exploratory network meta-analysis according to the PRISMA statement. Results: Thirty studies were included in the quantitative analysis. The pairwise meta-analysis showed for Exercise Training + High Protein vs. High Protein a moderate and statistically significant effect size (SMD 0.45; 95% CI 0.04 to 0.86), for Exercise Training + High Protein vs. Exercise Training a high but statistically not significant effect size (SMD 0.91; 95% CI -0.59 to 2.41) and for Exercise Training alone vs. Control a moderate but statistically not significant effect size (SMD 0.67; 95% CI -0.25 to 1.60). In the exploratory network meta-analysis three interventions showed statistically significant effect sizes compared to Control and all of them included the treatment Exercise Training. Conclusions: Results underline the importance of exercise training and a sufficient protein intake to preserve FFM during weight loss in adults with obesity. The effect of calcium and vitamin D supplementation remains controversial and further research are needed.


2022 ◽  
Vol 10 ◽  
pp. 205031212110734
Author(s):  
Mischa Woisetschläger ◽  
Simona Chisalita ◽  
Marta Vergara ◽  
Anna Spångeus

Objectives: Fracture liaison services are designed to identify patients needing osteoporosis treatment after a fracture. Some fracture liaison service designs involve a prescreening step, for example, fracture risk assessment tool (FRAX®). Another possible prescreening tools are bone mass density assessment in the acute setting. The aim of this study was to assess the effectiveness of prescreening tools. Methods: In the present prospective cohort study, women aged >55 years with a radius fracture were included. Patients were recruited at the emergency department after experiencing their fracture. All patients performed fracture risk assessment by fracture risk assessment tool, and bone mass density assessment by digital X-ray radiogrammetry and dual-energy X-ray absorptiometry (prescreening steps) as well as full routine evaluation at the osteoporosis unit (endpoint). The main outcome measures were sensitivity, specificity, predictive values, and area under the curve. Results: Forty-one women were recruited (mean age: 70 ± 8 years). Of these, 54% fulfilled the treatment indication criteria of osteoporosis after a full examination. Fracture risk assessment tool without bone mass density (cutoff ⩾ 15%) for prescreening patients had a high sensitivity (90%) but a low area under the curve (0.50) and specificity (16%). The highest area under the curve (0.73) was found prescreening with bone mass density assessment (dual-energy X-ray absorptiometry or digital X-ray radiogrammetry) having a sensitivity of 59%–86% and specificity of 61%–90%. Conclusion: This study, though small, raises questions regarding the effectiveness of using a prescreening step in fracture liaison services for high-risk individuals. In this cohort, FRAX® without bone mass density had a low precision, with a risk of both underestimating and overestimating patients requiring treatment. Bone mass density assessment in the acute setting could improve the precision of prescreening. Further investigations on the effectiveness and health economics of prescreening steps in fracture liaison services are needed.


Author(s):  
Chun-Sheng Hsu ◽  
Shin-Tsu Chang ◽  
Yuan-Yang Cheng ◽  
Hsu-Tung Lee ◽  
Chih-Hui Chen ◽  
...  

Bone mass density (BMD) has been used universally in osteoporosis diagnosis and management. Adherence to anti-osteoporosis medication is related to mortality risk. This study aimed to investigate the relationship between mortality and low BMD of the femoral neck and vertebra among patients self-discontinuing anti-osteoporosis medication. Between June 2016 and June 2018, this single-center retrospective study recruited 596 participants who self-discontinued anti-osteoporosis medication. Patients were categorized into four groups by BMD of the right femoral neck and lumbar spine. Occurrence and causes of mortality were obtained from medical records. Independent risk factors and the five-year survival of various levels of BMD were analyzed by Cox regression and the Kaplan–Meier survival analysis. BMD value and serum calcium level were significantly lower in the mortality group (p < 0.001). Compared to the reference, the adjusted hazard ratio (HR) for all-cause mortality in patients with lower BMD of both the lumbar spine and femoral neck was 3.03. The five-year cumulative survival rate was also significantly lower (25.2%, p < 0.001). A low calcium level was also associated with mortality (HR: 0.87, 95% CI: 0.76–0.99, p = 0.033). In conclusion, lower BMD and calcium levels were associated with higher mortality risk in patients with poor adherence. Hence, patients self-discontinuing anti-osteoporosis medication should be managed accordingly.


2021 ◽  
Vol 12 ◽  
Author(s):  
Dung-Jang Tsai ◽  
Wen-Hui Fang ◽  
Li-Wei Wu ◽  
Ming-Cheng Tai ◽  
Chung-Cheng Kao ◽  
...  

PurposeGenome-wide association studies have identified numerous genetic variants that are associated with osteoporosis risk; however, most of them are present in the non-coding regions of the genome and the functional mechanisms are unknown. In this study, we aimed to investigate the potential variation in runt domain transcription factor 2 (RUNX2), which is an osteoblast-specific transcription factor that normally stimulates bone formation and osteoblast differentiation, regarding variants within RUNX2 binding sites and risk of osteoporosis in postmenopausal osteoporosis (PMOP).MethodsWe performed bioinformatics-based prediction by combining whole genome sequencing and chromatin immunoprecipitation sequencing to screen functional SNPs in the RUNX2 binding site using data from the database of Taiwan Biobank; Case-control studies with 651 postmenopausal women comprising 107 osteoporosis patients, 290 osteopenia patients, and 254 controls at Tri-Service General Hospital between 2015 and 2019 were included. The subjects were examined for bone mass density and classified into normal and those with osteopenia or osteoporosis by T-scoring with dual-energy X-ray absorptiometry. Furthermore, mRNA expression and luciferase reporter assay were used to provide additional evidence regarding the associations identified in the association analyses. Chi-square tests and logistic regression were mainly used for statistical assessment.ResultsThrough candidate gene approaches, 3 SNPs in the RUNX2 binding site were selected. A novel SNP rs6086746 in the PLCB4 promoter was identified to be associated with osteoporosis in Chinese populations. Patients with AA allele had higher risk of osteoporosis than those with GG+AG (adjusted OR = 6.89; 95% confidence intervals: 2.23–21.31, p = 0.001). Moreover, the AA genotype exhibited lower bone mass density (p &lt; 0.05). Regarding mRNA expression, there were large differences in the correlation between PLCB4 and different RUNX2 alleles (Cohen’s q = 0.91). Functionally, the rs6086746 A allele reduces the RUNX2 binding affinity, thus enhancing the suppression of PLCB4 expression (p &lt; 0.05).ConclusionsOur results provide further evidence to support the important role of the SNP rs6086746 in the etiology of osteopenia/osteoporosis, thereby enhancing the current understanding of the susceptibility to osteoporosis. We further studied the mechanism underlying osteoporosis regulation by PLCB4.


Author(s):  
Mr. Sujin Thomas

Bone is living, growing tissue. It is made mostly of collagen, a protein that provides a soft framework, and calcium phosphate, a mineral that adds strength and hardens the framework. This combination of collagen and calcium makes bone both flexible and strong, which in turn helps bone to withstand stress.1 More than 99 percent of the body’s calcium is contained in the bones and teeth. The remaining 1 percent is found in the blood. Throughout one’s lifetime, old bone is removed (resorption) and new bone is added to the skeleton (formation). During childhood and teenage years, new bone is added faster than old bone is removed. As a result, bones become larger, heavier, and denser. Bone formation outpaces resorption until peak bone mass (maximum bone density and strength) is reached around age 30. After that time, bone resorption slowly begins to exceed bone formation. For women, bone loss is fastest in the first few years after menopause, and it continues into the postmenopausal years. Osteoporosis, or porous bone, is a disease characterized by low bone mass and structural deterioration of bone tissue, leading to bone fragility and an increased risk of fractures of the hip, spine, and wrist. Osteoporosis is more likely to develop if you did not reach optimal peak bone mass during your bone-building years. Women are at a greater risk than men, especially women who are thin or have a small frame, as are those of advanced age. Women who are postmenopausal, including those who have had early or surgically induced menopause, or abnormal or absence of menstrual periods, are at greater risk. Cigarette smoking, eating disorders such as anorexia nervosa or bulimia, low amounts of calcium in the diet, heavy alcohol consumption, inactive lifestyle, and use of certain medications, such as corticosteroids and anticonvulsants, are also risk factors for osteoporopsis.2 The underlying mechanism in all cases of osteoporosis is an imbalance between bone resorption and bone formation. In normal bone, matrix remodeling of bone is constant; up to 10% of all bone mass may be undergoing remodeling at any point in time. The process takes place in bone multicellular units (BMUs) as first described by Frost & Thomas in 1963. Osteoclasts are assisted by transcription factor PU.1 to degrade the bone matrix, while osteoblasts rebuild the bone matrix. Low bone mass density can then occur when osteoclasts are degrading the bone matrix faster than the osteoblasts are rebuilding the bone. The three main mechanisms by which osteoporosis develops are an inadequate peak bone mass (the skeleton develops insufficient mass and strength during growth), excessive bone resorption, and inadequate formation of new bone during remodeling. An interplay of these three mechanisms underlies the development of fragile bone tissue. Hormonal factors strongly determine the rate of bone resorption; lack of estrogen (e.g. as a result of menopause) increases bone resorption, as well as decreasing the deposition of new bone that normally takes place in weight-bearing bones.this leads to weakening and softening of bones the bones become soft and it will prone to get fracture or collapse.


2021 ◽  
Vol 2 (2) ◽  
pp. 177-186
Author(s):  
Bagus Suryana ◽  
◽  
Muhammad Febriliant ◽  
Rulli Rosandi ◽  
Sukarlin Sukarlin ◽  
...  

Background: Many factors can cause changes in bone mass density (BMD) in women with postmenopausal osteopenia. Aim: Determine factors associated with changes in BMD in postmenopausal women with osteopenia with the most influential risk factors within 1 year. Methods: Survey was conducted on 38 patients who were included in the inclusion criteria with a cross-sectional study analysis and had BMD data for the last 2 years, body mass index, and conducted interviews for physical activity, age of menopause, and duration of menopause. Blood samples were also taken to check total calcium levels, vitamin D levels and estrogen levels. Finally, patients are followed for up to 1 week for daily nutrition records. The relationship between these factors and changes in BMD was analyzed using Pearson's or Spearman's test. The analysis result was considered significant if p<0.05. Results: There was no significant relationship between body mass index, menopause duration, physical activity, dietary calcium, serum calcium levels and serum estradiol levels on changes in BMD with p value > 0.05. However, there was a significant relationship between menopause onset and changes in ward mass density (r = 0,321, p = 0,04) and lumbal 1 (r = 0,333, p = 0,04), serum vitamin D levels and changes in great trochanter mass density (r = 0,336, p = 0,036), physical activity score and changes in ward mass density (r = -0,522, p < 0,01). Conclusion: menopause onset, vitamin D and physical activity are significantly associated with changes in BMD in female patients with postmenopausal osteopenia.


2021 ◽  
Vol 12 (3) ◽  
pp. 284-288
Author(s):  
Florina-Ligia POPA ◽  
Madalina Gabriela ILIESCU ◽  
Mihaela STANCIU ◽  
Vlad GEORGEANU

Introduction. Osteoporosis has a major influence on the quality of life because of its impact on bone strength. Osteoporosis and fractures are frequent in patients with multiple sclerosis, decreased mobility being an important risk factor in these patients. Objectives. This paper presents a case of severe osteoporosis in a patient with multiple sclerosis, to emphasize a correlation between this two pathologies. Material and Methods. We present the case of a female Caucasian patient, aged 65 years, known with progressive multiple sclerosis, on long-term use of glucocorticoids, and severe osteoporosis, who is investigated for mechanical pain and functional deficiency in the lumbar spine and the right hip, motor deficit, predominantly on right limbs and walking disorders. The patient was diagnosed with severe osteoporosis treated with raloxifene and bisphosphonates, with multiple vertebral fractures and vitamin D deficiency. During hospitalization the patient followed myorelaxant therapy and an individualized rehabilitation program. Results and discussion. During follow-up, there was a significant increase followed by a recent decrease in bone mass density in the lumbar spine and hip. The patient was recommended a loading dose of cholecalciferol for three months and initiation of teriparatide therapy after restoring 25-hydroxy vitamin D levels. Conclusion. In patients with multiple sclerosis,screening and early management of osteoporosis and osteopenia are essential. Keywords: multiple sclerosis, glucocorticoid therapy, osteoporosis,


2021 ◽  
Vol 12 ◽  
Author(s):  
Yongquan Gao ◽  
Xiaochen Liu ◽  
Yuan Gu ◽  
Deye Song ◽  
Muliang Ding ◽  
...  

BackgroundOsteoporosis is a common complication of acute fracture, which can lead to fracture delayed union or other complications and resulting in poor fracture healing. Bisphosphate is a common anti-osteoporosis drug, but its application in fracture patients is still controversial because of its inhibitory effect on bone resorption.MethodStudies were acquired from literature databases in accordance with established inclusion criteria. Standard mean difference (SMD) and 95% confidence intervals (Cls) were calculated to evaluate the effectiveness of the bisphosphonates treatment in fracture patients. Data analysis was conducted with the Review Manager 5.4.1 software.ResultsA total of 16 studies involving 5022 patients obtained from selected databases were examined. As expected, bisphosphate had no significant effect on fracture healing time, but it could significantly increase BMD and prevent osteoporosis. Meanwhile, bisphosphate can inhibit both bone resorption and bone formation markers, resulting in low bone turnover state.ConclusionThis meta-analysis showed that bisphosphonate have no significant effect on fracture healing time but they do increase the changes in BMD and reduce bone synthesis and resorption markers. Early application of bisphosphonates after injury in the appropriate patient population should be considered.


Sign in / Sign up

Export Citation Format

Share Document