Design of a Torsion Tester for Measuring Murine Bone Properties for Studies on the Effects of Diabetes and Obesity

2013 ◽  
Author(s):  
Brandon Sherrod ◽  
Shawn Gilbert ◽  
Krista Casazza ◽  
Alan Eberhardt
Keyword(s):  
Bone Mineral Density ◽  
Bone Mineral ◽  
Fracture Incidence ◽  
Type I ◽  
Healthy Weight ◽  
High Fat ◽  
Mineral Density ◽  
Body Regions ◽  
Increased Risk ◽  
Diabetes And Obesity

Conditions such as diabetes and obesity have been found to affect the mechanical integrity of bone. Studies have shown that diabetic rodent models exhibit lower levels of new bone formation during fracture healing 1, lower bone mineral density (BMD) 2, and increased risk of fracture 3. There are differences, however, in the bone integrity of bone samples from type I and type II diabetics, which is most likely due to obesity 2. Findings from research on obesity’s effects on bone integrity have been controversial; although there is an increase in bone mineral density (BMD) with increasing body mass index (BMI) and a decrease in fracture incidence in the central body regions in obese women compared to healthy weight women due to soft tissue padding, there is an increase in fracture incidence at extremeties 4. Other studies have shown that while cortical bone strength may not be adversely affected by high-fat diets, cancellous bone BMD and mechanical strength was significantly lower in high-fat diet mice than low-fat diet mice 5. In addition, extreme obesity has been associated with lower BMD despite the general trend of increased BMD with higher BMI 6.

scholarly journals DXA parameters, Trabecular Bone Score (TBS) and Bone Mineral Density (BMD), in fracture risk prediction in endocrine-mediated secondary osteoporosis

Endocrine ◽  
2021 ◽  
Author(s):  
Enisa Shevroja ◽  
Francesco Pio Cafarelli ◽  
Giuseppe Guglielmi ◽  
Didier Hans
Keyword(s):  
Bone Mineral Density ◽  
Trabecular Bone ◽  
Bone Mineral ◽  
Trabecular Bone Score ◽  
Bone Microarchitecture ◽  
Fragility Fractures ◽  
Endocrine Disorders ◽  
Mineral Density ◽  
Increased Risk

AbstractOsteoporosis, a disease characterized by low bone mass and alterations of bone microarchitecture, leading to an increased risk for fragility fractures and, eventually, to fracture; is associated with an excess of mortality, a decrease in quality of life, and co-morbidities. Bone mineral density (BMD), measured by dual X-ray absorptiometry (DXA), has been the gold standard for the diagnosis of osteoporosis. Trabecular bone score (TBS), a textural analysis of the lumbar spine DXA images, is an index of bone microarchitecture. TBS has been robustly shown to predict fractures independently of BMD. In this review, while reporting also results on BMD, we mainly focus on the TBS role in the assessment of bone health in endocrine disorders known to be reflected in bone.

scholarly journals High systemic bone mineral density increases the risk of incident knee OA and joint space narrowing, but not radiographic progression of existing knee OA: the MOST study

2009 ◽  
Vol 69 (01) ◽  
pp. 163-168 ◽  
Author(s):  
M C Nevitt ◽  
Y Zhang ◽  
M K Javaid ◽  
T Neogi ◽  
J R Curtis ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Bone Mineral ◽  
Joint Space Narrowing ◽  
Weight Bearing ◽  
Joint Space ◽  
Whole Body ◽  
Mineral Density ◽  
Knee Oa ◽  
Increased Risk

Objectives:Previous studies suggest that high systemic bone mineral density (BMD) is associated with incident knee osteoarthritis (OA) defined by osteophytes but not with joint space narrowing (JSN), and are inconsistent regarding BMD and progression of existing OA. The association of BMD with incident and progressive tibiofemoral OA was tested in a large prospective study of men and women aged 50–79 years with or at risk for knee OA.Methods:Baseline and 30-month weight-bearing posteroanterior and lateral knee radiographs were scored for Kellgren-Lawrence (K-L) grade, JSN and osteophytes. Incident OA was defined as the development of K-L grade ⩾2 at follow-up. All knees were classified for increases in grade of JSN and osteophytes from baseline. The association of gender-specific quartiles of baseline BMD with risk of incident and progressive OA was analysed using logistic regression, adjusting for covariates.Results:The mean (SD) age of 1754 subjects was 63.2 (7.8) years and body mass index was 29.9 (5.4) kg/m2. In knees without baseline OA, higher femoral neck and whole body BMD were associated with an increased risk of incident OA and increases in grade of JSN and osteophytes (p<0.01 for trends); adjusted odds were 2.3–2.9-fold greater in the highest compared with the lowest BMD quartiles. In knees with existing OA, progression was not significantly related to BMD.Conclusions:In knees without OA, higher systemic BMD was associated with a greater risk of the onset of JSN and K-L grade ⩾2. The role of systemic BMD in early knee OA pathogenesis warrants further investigation.

Management of bone metabolism in epilepsy

2021 ◽  
Vol 74 (7-8) ◽  
pp. 257-265
Author(s):  
Firdevs Ezgi Uçan Tokuç ◽  
Fatma Genç ◽  
Abidin Erdal ◽  
Yasemin Biçer Gömceli
Keyword(s):  
Bone Mineral Density ◽  
Vitamin D ◽  
Bone Metabolism ◽  
Bone Mineral ◽  
Outpatient Clinic ◽  
Bone Mineralization ◽  
Mineral Density ◽  
Low Bone Mineral Density ◽  
Increased Risk ◽  
Significant Difference

Many systemic problems arise due to the side effects of antiepileptic drugs (AEDs) used in epilepsy patients. Among these adverse effects are low bone mineral density and increased fracture risk due to long-term AED use. Although various studies have supported this association with increased risk in recent years, the length of this process has not been precisely defined and there is no clear consensus on bone density scanning, intervals of screening, and the subject of calcium and vitamin D supplementation. In this study, in accordance with the most current recommendations, our applications and data, including the detection of possible bone mineralization disorders, treatment methods, and recommendations to prevent bone mineralization disorders, were evaluated in epilepsy patients who were followed up at our outpatient clinic. It was aimed to draw attention to the significance of management of bone metabolism carried out with appropriate protocols. Epilepsy patients were followed up at the Antalya Training and Research Hospital Department of Neurology, Epilepsy Outpatient Clinic who were at high risk for osteoporosis (use of valproic acid [VPA] and enzyme-inducing drugs, using any AED for over 5 years, and postmenopausal women) and were evaluated using a screening protocol. According to this protocol, a total of 190 patients suspected of osteoporosis risk were retrospectively evaluated. Four patients were excluded from the study due to secondary osteoporosis. Of the 186 patients who were included in the study, 97 (52.2%) were women and 89 (47.8%) were men. Prevalence of low bone mineral density (BMD) was 42%, in which osteoporosis was detected in 11.8% and osteopenia in 30.6% of the patients. Osteoporosis rate was higher at the young age group (18-45) and this difference was statistically significant (p=0.018). There was no significant difference between male and female sexes according to osteoporosis and osteopenia rates. Patients receiving polytherapy had higher osteoporosis rate and lower BMD compared to patients receiving monotherapy. Comparison of separate drug groups according to osteoporosis rate revealed that osteoporosis rate was highest in patient groups using VPA+ carbamazepine (CBZ) (29.4%) and VPA polytherapy (19.4%). Total of osteopenia and osteoporosis, or low BMD, was highest in VPA polytherapy (VPA+ non-enzyme-inducing AED [NEID]) and CBZ polytherapy (CBZ+NEID) groups, with rates of 58.3% and 55.1%, respectively. In addition, there was no significant difference between drug groups according to bone metabolism markers, vitamin D levels, and osteopenia-osteoporosis rates. Assuming bone health will be affected at an early age in epilepsy patients, providing lifestyle and diet recommendations, avoiding polytherapy including VPA and CBZ when possible, and evaluating bone metabolism at regular intervals are actions that should be applied in routine practice.

scholarly journals Evaluation of bone mineral density (BMD) and indicators of bone turnover in patients with hemophilia

2018 ◽  
Vol 18 (2) ◽  
pp. 206-210 ◽  
Author(s):  
Mehmet Dagli ◽  
Ali Kutlucan ◽  
Sedat Abusoglu ◽  
Abdulkadir Basturk ◽  
Mehmet Sozen ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Vitamin D ◽  
Bone Formation ◽  
Bone Mass ◽  
Bone Mineral ◽  
Type I ◽  
Healthy Controls ◽  
Mineral Density ◽  
Lymphocyte Ratio ◽  
Significant Difference

A decrease in bone mass is observed in hemophilic patients. The aim of this study was to evaluate bone mineral density (BMD), parathyroid hormone (PTH), 25-hydroxy vitamin D (vitamin D), and a bone formation and resorption marker, procollagen type I N-terminal propeptide (PINP) and urinary N-terminal telopeptide (uNTX) respectively, in hemophilic patients and healthy controls. Laboratory parameters related to the pathogenesis of bone loss such as neutrophil-lymphocyte ratio (NLR) and platelet-lymphocyte ratio (PLR) were also evaluated. Thirty-five men over 18 years of age, with severe hemophilia (A and B) and receiving secondary prophylaxis, were included in the study. The same number of age-, sex-, and ethnicity-matched healthy controls were evaluated. Anthropometric, biochemical, and hormonal parameters were determined in both groups. No significant difference in anthropometric parameters was found between the two groups. The BMD was low in 34% of hemophilic patients. Vitamin D, calcium, and free testosterone levels were significantly lower (p < 0.001, p = 0.011, p < 0.001, respectively), while PTH, PINP, and activated partial thromboplastin time (aPTT) levels were significantly higher (p < 0.014, p = 0.043, p < 0.001, respectively), in hemophilic patients compared to controls. There was no significant difference between the two groups in NLR, PLR, phosphorus, thyroid-stimulating hormone, and uNTX level. The reduction of bone mass in hemophilic patients may be evaluated using the markers of bone formation and resorption, enabling early detection and timely treatment.

scholarly journals Continuing Relief of Pain with Long Term Treatment for Osteoporosis with Intravenous Pamidronate

2018 ◽  
Vol 4 (1) ◽  
pp. 51-58
Author(s):  
Wilson S ◽  
Sharp CA ◽  
Davie MWJ
Keyword(s):  
Bone Mineral Density ◽  
Vertebral Fracture ◽  
Side Effects ◽  
Bone Mineral ◽  
Oral Treatment ◽  
Fracture Incidence ◽  
Mineral Density ◽  
Intravenous Pamidronate ◽  
Vertebral Fracture Incidence

Purpose: Bisphosphonates are valuable in reducing the incidence of fracture. Side effects limit persistence with oral therapy and long term studies of pain relief are difficult to pursue. Intravenous bisphosphonates offer an alternative treatment to oral bisphosphonates and are tolerated over a longer period. The use of Pamidronate, an intravenously administered bisphosphonate, to benefit pain and reduce fracture incidence in the long term has not been extensively investigated. The study aimed to investigate the effect of Pamidronate on pain, vertebral fracture incidence and Bone Mineral Density over 6 or more years.Methods: Patients were offered intravenous Pamidronate if oral treatment with bisphosphonates or Hormone replacement therapy had failed due to side effects, fractures continued on oral treatment or oesophageal reflux led to cessation of oral treatment. Pain was assessed using the Nottingham health profile; radiographs were used to evaluate vertebral fracture and DXA measured bone mineral density.Results: The primary outcome was the pain domain. Median patient follow up was 9 years. Pain had improved significantly (p = 0.03) and in 68% pain had either improved or remained unchanged. Vertebral fractures occurred in 14% of patients in the first 3 years, 9.5% in years 4-6, but increased in years 7-9 to 27%. Bone mineral density increased in the lumbar spine (p < 0.001) but not at the femoral neck.Conclusions: Pamidronate had a beneficial effect on pain over the period of the study. Vertebral fracture incidence increased after 6 years of Pamidronate, although spine BMD increased significantly.

scholarly journals Association Between moleculars and Osteoporotic Fracture Risk:A systematical review

2020 ◽  
Author(s):  
Jie-Yu Liu ◽  
Jia-Xiang Wang ◽  
Li Xu ◽  
Shu-Feng Lei ◽  
Fei-Yan Deng
Keyword(s):  
Bone Mineral Density ◽  
Postmenopausal Women ◽  
Bone Mineral ◽  
Elderly Population ◽  
Early Recognition ◽  
Osteoporotic Fractures ◽  
Middle Aged ◽  
Mineral Density ◽  
Low Bone Mineral Density ◽  
Increased Risk

AbstractOsteoporosis is a systemic chronic skeletal disease, which is characterized by low bone mineral density (BMD) and increased risk to osteoporotic fractures (OFs). OFs are associated with high mortality and morbidity, and seriously affect the life quality of patients. Osteoporosis is prevalent in the middle-aged and elderly population, especially the postmenopausal women. With population aging, osteoporosis becomes a world-wide serious public health problem. Early recognition of the high-risk population followed by timely and efficient intervention and/or treatment is important for preventing OFs. In light of the high heritability and complex pathogenesis of OP, comprehensive consideration of significant biological/biochemical factors is necessary for accurate risk evaluation. For this purpose, we reviewed recent research progress on moleculars which are diagnostic and/or predictive of OFs risk. Future integrative analyses and systematic evaluation of these moleculars may facilitate developing novel methodologies and/or test strategies, i.e., biochips, for early recognition of osteoporosis, hence to contribute to preventing OFs in the world.Graphical AbstractOsteoporosis, which is characterized by low bone mineral density (BMD) and increased risk to osteoporotic fractures (OFs), is prevalent in the middle-aged and elderly population, especially in the postmenopausal women. We focused on several types of important molecules, including proteins/peptides, RNAs, lipids, to gain comprehensive understanding and to generate novel perspectives in predicting and diagnosing OFs.

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