scholarly journals A chronic high phosphate intake in mice is detrimental for bone health without major renal alterations

2021 ◽  
Author(s):  
Marko Ugrica ◽  
Carla Bettoni ◽  
Soline Bourgeois ◽  
Arezoo Daryadel ◽  
Eva-Maria Pastor-Arroyo ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Bone Resorption ◽  
Bone Mineral ◽  
Bone Health ◽  
Ammonium Excretion ◽  
Mineral Density ◽  
Mature Adult ◽  
Phosphate Intake ◽  
The Impact ◽  
High Phosphate

Abstract Background Phosphate intake has increased in the last decades due to a higher consumption of processed foods. This higher intake is detrimental for patients with chronic kidney disease, increasing mortality and cardiovascular disease risk and accelerating kidney dysfunction. Whether a chronic high phosphate diet is also detrimental for the healthy population is still under debate. Methods We fed healthy mature adult mice over a period of one year with either a high (1.2% w/w) or a standard (0.6% w/w) phosphate diet, and investigated the impact of a high phosphate diet on mineral homeostasis, kidney function and bone health. Results The high phosphate diet increased plasma phosphate, parathyroid hormone (PTH) and calcitriol levels, with no change in fibroblast growth factor 23 levels. Urinary phosphate, calcium and ammonium excretion were increased. Measured glomerular filtration rate was apparently unaffected, while blood urea was lower and urea clearance was higher in animals fed the high phosphate diet. No change was observed in plasma creatinine levels. Blood and urinary pH were more acidic paralleled by higher bone resorption observed in animals fed a high phosphate diet. Total and cortical bone mineral density was lower in animals fed a high phosphate diet and this effect is independent of the higher PTH levels observed. Conclusions A chronic high phosphate intake did not cause major renal alterations, but affected negatively bone health, increasing bone resorption and decreasing bone mineral density.

scholarly journals Bone Mineral Density Trends During the First Year After Laparoscopic Sleeve Gastrectomy—a Cohort Study on 241 Patients

2021 ◽  
Author(s):  
Elisabeta Malinici ◽  
Anca Sirbu ◽  
Miruna Popa ◽  
Marian Andrei ◽  
Sorin Ioacara ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Sleeve Gastrectomy ◽  
Laparoscopic Sleeve Gastrectomy ◽  
Bone Mineral ◽  
Bone Health ◽  
Significant Loss ◽  
Baseline Body Mass Index ◽  
Mineral Density ◽  
Total Bone Mineral Density ◽  
The Impact

Abstract Purpose Laparoscopic sleeve gastrectomy (LSG) is an effective weight loss procedure, but detrimental effects on bone health have been described. We aimed to assess the dynamics of regional and total bone mineral density (BMD) in a cohort of patients undergoing LSG and to capture gender differences in terms of evolution. Materials and Methods We conducted a retrospective study on 241 patients who underwent LSG to determine the regional and total BMD changes at 6 and 12 months after the intervention. Results One hundred ten males and 140 females (97 pre-, 43 postmenopausal) were included. Mean baseline body mass index (BMI) was 44.16 ± 6.11 kg/m2 in males and 41.60 ± 5.54 kg/m2 in females, reaching 28.62 ± 4.26 kg/m2 and 27.39 ± 4.2 kg/m2, respectively, at 12 months. BMD showed a continuous decline, with significant loss from 6 months postoperatively. There was a positive correlation between BMD and BMI decline at 12 months (r = 0.134, p < 0.05). Total BMD loss at 12 months was significantly greater in males than premenopausal females, independent of BMI variation and age. During the first 6 months, men lost significantly more bone mass than premenopausal and postmenopausal women (BMD variation was 2.62%, 0.27%, 1.58%, respectively). The second period (6–12 months) was similar in all three groups, revealing a further steady (~ 1.4%) BMD decline. Conclusions Our results are consistent with previous findings that LSG negatively impacts BMD, stressing the importance of bone health-oriented measures in postoperative care. Moreover, the impact that seems more significant in males warrants future exploration, as it might change clinical practice. Graphical abstract

scholarly journals The Connection Between Vitamin K and Bone Health

2015 ◽  
Vol 8 (2) ◽  
Author(s):  
Jamy (Ning) Fu
Keyword(s):  
Bone Mineral Density ◽  
Bone Mineral ◽  
Vitamin K ◽  
Bone Health ◽  
Bone Fractures ◽  
The Body ◽  
Mineral Density ◽  
Densité Minérale Osseuse ◽  
The Impact ◽  
Viable Method

Vitamin K is essential to the body because it is known to help blood coagulate and activate osteocalcin, a protein involved in maintaining healthy bones. In this review, one study observing the impact of vitamin K supplementation on patients’ bone mineral densities and three studies focusing on the effects of vitamin K supplementation on the incidence of bone fractures are discussed to determine whether the vitamin may be important for maintaining bone health. While some promising results, such as an increase in bone mineral density of subjects after vitamin K supplementation arose, the conclusions reached by the four studies were not statistically significant enough to justify the importance of vitamin K in maintaining bone health. Well-controlled studies that are unbiased, statistically powerful, and focused on vitamin K’s effects on bone density are required in the future to provide further insight on whether vitamin K supplementation is a viable method of improving bone health. La vitamine K est essentielle pour le corps, car il est connu pour assister dans la coagulation du sang ainsi qu’activer l'ostéocalcine, une protéine impliquée dans le maintien de la santé des os. Ici, une étude dirigé vers les observations de l'impact de la consommation de suppléments de la vitamine K sur la densité minérale osseuse de patients, puis trois autres études portant sur les effets de la consommation de suppléments de la vitamine K sur l'incidence des fractures osseuses sont examinées afin de déterminer si la vitamine soit une facteur important dans le maintien de la santé des os. Tandis que des résultats sont révélés prometteurs, comme ceux montrant une augmentation de la densité minérale osseuse des sujets après la consommation des suppléments de la vitamine K, l’ensemble de conclusions tirées des quatre études ne présente pas suffisamment de données qui pourraient suggérer une corrélation entre la consommation des suppléments de la vitamine K et la santé des os. Des études supplémentaires portant sur les effets de la vitamine K sur la densité osseuse, mené dans des conditions contrôlés, bien conçus, impartiales, qui produiront des résultats persuasifs, sont nécessaires à être effectuer à l'avenir afin de donner un meilleur aperçu de l’effet de la supplémentation en vitamine K comme une méthode viable dans l’entretien de la santé des os.

scholarly journals Impact of hypogonadism on bone mineral density and vertebral fractures in HIV-infected men

2021 ◽  
Author(s):  
L. C. Pezzaioli ◽  
T. Porcelli ◽  
A. Delbarba ◽  
F. Maffezzoni ◽  
E. Focà ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Bone Mineral ◽  
Vertebral Fractures ◽  
Bone Health ◽  
Sex Hormone Binding Globulin ◽  
Gonadal Function ◽  
Mineral Density ◽  
T Score ◽  
Normal Bone Mineral Density ◽  
The Impact

Abstract Purpose Hypogonadism and osteoporosis are frequently reported in HIV-infected men and, besides multifactorial pathogenesis, they might be directly linked because of testicular involvement in bone health. We evaluated the prevalence of osteoporosis and vertebral fractures (VFs) in HIV-infected men, and assessed their relationship with gonadal function. Methods We enrolled 168 HIV-infected men (median age 53). Osteoporosis and osteopenia were defined with T-score ≤  – 2.5SD and T-score between  – 1 and  – 2.5SD, respectively. VFs were assessed by quantitative morphometric analysis. Total testosterone (TT), calculated free testosterone (cFT), Sex Hormone Binding Globulin (SHBG), Luteinizing Hormone (LH) and Follicle Stimulating Hormone (FSH) were obtained; overt hypogonadism was defined on symptoms and low TT or cFT, and classified into primary and secondary according to gonadotropins; compensated hypogonadism was defined as normal TT and cFT with high LH levels. Results Overall, osteoporosis and osteopenia were found in 87.5% of patients, and VFs were detected in 25% of them; hypogonadism was identified in 26.2% of cases. Osteoporotic patients had higher SHBG vs those with normal bone mineral density (BMD). Fractured patients were more frequently hypogonadal and with higher SHBG. SHBG showed negative correlation with both spine and femoral BMD, and positive correlation with VFs. In multivariate models, FSH showed negative impact only on femoral BMD, whereas older age and higher SHBG predicted VFs. Conclusion We found a high burden of bone disease and hypogonadism in HIV-infected men, and we showed that the impact of gonadal function on bone health is more evident on VFs than on BMD.

scholarly journals The impact of diet, body composition, and physical activity on child bone mineral density at five years of age—findings from the ROLO Kids Study

2019 ◽  
Vol 179 (1) ◽  
pp. 121-131 ◽  
Author(s):  
Marco K. McVey ◽  
Aisling A. Geraghty ◽  
Eileen C. O’Brien ◽  
Malachi J. McKenna ◽  
Mark T. Kilbane ◽  
...  
Keyword(s):  
Physical Activity ◽  
Bone Mineral Density ◽  
Vitamin D ◽  
Early Childhood ◽  
Body Composition ◽  
Bone Mineral ◽  
Bone Health ◽  
Bone Fractures ◽  
Mineral Density ◽  
The Impact

Abstract Bone health is extremely important in early childhood because children with low bone mineral density (BMD) are at a greater risk of bone fractures. While physical activity and intake of both calcium and vitamin D benefit BMD in older children, there is limited research on the determinants of good bone health in early childhood. The aim of this cross-sectional study was to investigate the impact of diet, physical activity, and body composition on BMD at five years of age. Dietary intakes and physical activity levels were measured through questionnaires. Whole body BMD was measured by dual-energy X-ray absorptiometry in 102 children. Child weight, height, circumferences, skinfolds and serum 25-hydroxyvitamin D (25OHD) concentrations were assessed. There was no association between BMD and dietary calcium, dietary vitamin D, 25OHD, physical activity, or sedentary behaviour. Several measures of body composition were significantly positively associated with BMD; however, neither fat mass nor lean body mass was associated with BMD. Conclusion: Although we found no association between self-reported dietary and lifestyle factors and bone health in early years, increased body size was linked with higher BMD. These findings are important as identifying modifiable factors that can improve bone health at a young age is of utmost importance.What is Known:• Bone health is extremely important in early childhood, as children with low bone mineral density (BMD) are at greater risk of bone fractures.• Physical activity has been found to be beneficial for bone health in adolescents, and body composition has also been associated with BMD in teenage years.• Limited research on the determinants of good bone health in early childhood.What is New:• No association between self-reported lifestyle and dietary factors with bone health in early childhood.• Increased body size was associated with higher BMD at five years of age.

scholarly journals A REVIEW: MECHANISTIC INSIGHTS INTO THE EFFECT OF THYROID DISORDERS ON ESTROGEN LEVEL AND BONE MINERAL DENSITY

2019 ◽  
pp. 9-17
Author(s):  
MINAKSHI JOSHI ◽  
SHRADHA BISHT ◽  
MAMTA F. SINGH
Keyword(s):  
Bone Mineral Density ◽  
Thyroid Hormone ◽  
Bone Turnover ◽  
Bone Mineral ◽  
Thyroid Stimulating Hormone ◽  
Thyroid Disorders ◽  
Hypothyroid Patient ◽  
Mineral Density ◽  
Estrogen Level ◽  
The Impact

Thyroid hormone serves as an indispensable component for the optimum functioning of various biological systems. They curb body’s metabolism, regulates the estrogen level, regulates bone turnover, essential for skeletal development and mineralization. Within the scope of knowledge, it is intimately familiar that thyroid disorders have widespread systemic manifestations, among which in hypothyroidism, even though elevated TSH (thyroid-stimulating hormone) may reduce estrogen level which in turn stimulates osteoclasts and thus cause osteoporosis, while hyperthyroidism accelerates bone turnover. Hypothyroidism does not directly interfere with the skeletal integrity, but treatment with levothyroxine for the suppression of TSH to bring the hypothyroid patient to euthyroid state for a long haul; lead to simultaneous reduction in bone mass and in (bone mineral density) BMD. After the initial relevation of the correlation between thyroid disorders and osteoporosis in numerous studies have emphasized that both hypo and hyperthyroidism either directly or indirectly affects the bone mineral density or leads to the progression of osteoporosis. Therefore the present study is aimed and so designed to review all the possible associations between them and the impact of thyroid disorders on estrogen level and bone mineral density. The main findings of this review indicate that both excesses as well as deficiency of thyroid hormone can be potentially deleterious for bone tissue.

scholarly journals Bone mineral density predictors in long-standing type 1 and type 2 diabetes mellitus

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Stefana Catalina Bilha ◽  
Letitia Leustean ◽  
Cristina Preda ◽  
Dumitru D. Branisteanu ◽  
Laura Mihalache ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Bone Mineral Density ◽  
Lumbar Spine ◽  
Femoral Neck ◽  
Bone Mineral ◽  
Mineral Density ◽  
Cross Sectional ◽  
The Impact

Abstract Background Despite the increased fracture risk, bone mineral density (BMD) is variable in type 1 (T1D) and type 2 (T2D) diabetes mellitus. We aimed at comparing independent BMD predictors in T1D, T2D and control subjects, respectively. Methods Cross-sectional case-control study enrolling 30 T1D, 39 T2D and 69 age, sex and body mass index (BMI) – matched controls that underwent clinical examination, dual-energy X-ray absorptiometry (BMD at the lumbar spine and femoral neck) and serum determination of HbA1c and parameters of calcium and phosphate metabolism. Results T2D patients had similar BMD compared to T1D individuals (after adjusting for age, BMI and disease duration) and to matched controls, respectively. In multiple regression analysis, diabetes duration – but not HbA1c- negatively predicted femoral neck BMD in T1D (β= -0.39, p = 0.014), while BMI was a positive predictor for lumbar spine (β = 0.46, p = 0.006) and femoral neck BMD (β = 0.44, p = 0.007) in T2D, besides gender influence. Age negatively predicted BMD in controls, but not in patients with diabetes. Conclusions Long-standing diabetes and female gender particularly increase the risk for low bone mass in T1D. An increased body weight partially hinders BMD loss in T2D. The impact of age appears to be surpassed by that of other bone regulating factors in both T1D and T2D patients.

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