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1.
目的 通过对维吾尔族、汉族不同民族人群BMI、Bone、Fat及Lean的测定比较,了解新疆维、汉两族人群 Bone、Fat、Lean的分布特征,BMI的流行趋势以及有无明显的种族差异.探讨BMI与Bone、Fat及Lean之间的变化规律.方法 利用双能X线骨密度仪(DMS LEXXOS外星人)全身身体成分分析软件,对新疆维吾尔族、汉族人群的BMI以及3个测量指数(Bone、Lean、Fat)进行分析和多元回归分析.结果 无论男女或任何年龄段维吾尔族超重者均多于汉族人群;这与此前多篇相关报道一致[1-3].在同等BMI条件下,汉族男、女性Bone、Lean的百分比均大于维族男、女性.而维族男、女性Fat的百分比均大于汉族男、女性.维、汉人群的身体构建差异不大;从遗传理论的角度来说应该有一定的影响,但是经过近几十年各族人民在文化、饮食等方面的交流,后天因素有了很大的发展空间.结论 新疆维、汉族人群的膳食结构不平衡和身体活动不足是导致超重和肥胖率上升的最主要的原因,也是影响新疆汉族人群与维吾尔族人群身体健康的主要因素. 相似文献
2.
《BONE》2015
Low BMI is a risk factor for osteoporosis, but it is not clear if relationships between BMI, lean mass (LM), fat mass (FM) and BMD are consistent across different levels of BMI. We studied 1929 Caucasian participants (1014 females) aged 45–66 years in the Busselton Healthy Ageing Study in Western Australia. Body composition and BMD of total body, lumbar spine, total hip and femoral neck were measured using DXA. From generalized additive models, the positive relationships between BMI and BMD were weaker at high BMI, particularly at the spine and in males. In the entire cohort, adjusting for relevant covariates, LM and FM were significant predictors of all BMD measures in both genders. In men, analysis by tertiles of BMI showed that LM and FM (in kg) were positively associated with BMD (in mg/cm2) in tertile 1 except for LM and spine BMD (LM β: 5.18–6.80, FM β: 3.38–9.24, all P < 0.05), but not in the middle or upper tertiles (LM β: − 3.12–3.07, FM β: − 4.75–1.82, P > 0.05). In women, LM was positively associated with BMD in each tertile of BMI, except for spine BMD in the upper tertile, with regression coefficients lower in the upper tertile (β: 5.16–9.95, 5.76–9.56 and 2.80–5.78, respectively, all P < 0.05). FM was positively associated with total body, spine and total hip BMD in women in BMI tertile 1 (β: 2.86–6.68, P < 0.05); these associations were weaker or absent in the middle and upper tertiles. In conclusion, in middle-aged adults the positive relationships between lean or fat mass with BMD among those with higher BMI are absent in males and weaker in females. 相似文献
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4.
The relative contributions of lean tissue mass and fat mass to bone density in young women 总被引:17,自引:0,他引:17
Although obesity is associated with increased risk of many chronic diseases including cardiovascular disease, diabetes, hypertension, and cancer, there is little evidence to suggest that obesity increases risk of osteoporosis. In fact, both weight and body mass index (BMI) are positive predictors of bone mass in adults, suggesting that those who are overweight or obese may be at lower risk of osteoporosis. However, recent evidence suggests that in children and adolescents, obesity may be associated with lower rather than higher bone mass. To understand the relation of fat mass to bone mass, we examined data gathered from an ethnically diverse group of 921 young women, aged 20-25 years (317 African Americans, 154 Asians, 322 Caucasians, and 128 Latinas) to determine how fat mass (FM) as well as lean tissue mass (LTM) is associated with bone mass. Bone mass, FM, and LTM were measured using dual energy X-ray absorptiometry (GE Lunar Corp, Madison, WI). Bone mass was expressed as bone mineral density (BMD; g/cm2) and bone mineral apparent density (BMAD; g/cm3) for the spine and femoral neck, and as BMD and bone mineral content (BMC; g) for the whole body. Regression techniques were used to examine the following: (1) in separate equations, the associations of LTM and FM with each bone mass parameter; and (2) in the same equation, the independent contributions of LTM and FM to bone mass. LTM and FM were positively correlated with BMD at all skeletal sites. When the contributions of FM and LTM were examined simultaneously, both FM and LTM continued to be positively associated with bone mass parameters but the effect of FM was noted to be smaller than that of LTM. We conclude that in young women, LTM has a greater effect than fat mass on bone density per kg of tissue mass. 相似文献
5.
目的 调查分析绝经后妇女骨密度、体重指数、体脂和雌激素分泌之间的关系。方法 上海市区 5 0~ 70岁社区绝经后女性健康志愿者共 4 5 7例 ,进行身高体重、腰椎和股骨颈骨密度的测定、腰椎和髋部脂肪成分的检测 ,以及随机选取 118例志愿者进行血清雌激素的测定。所有资料输入电脑 ,应用SPSS软件进行统计分析。结果 非骨质疏松 (Non OP)组中体重指数与腰椎和股骨颈骨密度的相关系数分别为 0 . 5 3和 0 . 5 4 ,骨质疏松 (OP)组分别为 0 .33和 0 . 33;Non OP组中体重指数与腰椎和髋部体脂的相关系数分别为 0. 2 1和 0 . 0 92 ,OP组分别为 0 . 72和 0 .2 7;Non OP组的血清雌激素浓度与体脂呈弱相关 ,OP组血清雌激素浓度与体脂无关。Non- OP组中体重指数大于OP组 ,体脂低于OP组 ,但无统计学意义。经体重指数校正后 ,体脂 (即体脂 /体重指数 ,亦即体脂在体重中所占的比重 ) ,OP组体脂明显大于Non -OP组 (P <0 . 0 5 )。结论 体重是影响绝经后妇女骨密度的重要因素 ,体脂在体重中的比重增加会降低绝经后妇女的骨密度 ,这种体脂的增加与雌激素可能无关。绝经后妇女应在不增加体脂的前提下 ,适当增加体重来预防骨质疏松症的发生。 相似文献
6.
Performance of dual-energy x-ray absorptiometry in evaluating bone, lean body mass, and fat in pediatric subjects. 总被引:1,自引:0,他引:1
G M Chan 《Journal of bone and mineral research》1992,7(4):369-374
We studied the performance of the dual-energy x-ray absorptiometry method in evaluating bone mineral, fat, and lean soft tissue mass. This method was accurate in quantifying known small amounts of calcium, lard, and lean tissue mass. It was also accurate in evaluating small animal ashed bones, fat, and muscle mass. The analytic sensitivity of the method was 40 mg for calcium, 180 mg for fat, and 270 mg for lean tissue mass. The method was highly correlated to the single-photon absorptiometry method in measuring bone mineral content at the radius bone in 32 children, r = 0.998. There was a difference between the two methods in older children. Long-term precision for a small bone phantom was 2.0%. Total-body, lumbar, and radial bone scans were performed on 14 newborn infants whose gestational ages ranged from 28 to 41 weeks. Both total-body bone mineral and fat mass increased with gestational age and weight. The infant's total-body calcium was also associated with length and lumbar and radial bone densities. The lumbar bone density was associated with birth weight, gestational age, length, body mass index, body fat, and radial bone density. Male infant's lumbar bone density to total-body calcium ratio was higher than female infant's lumbar bone density ratio. Dual-energy x-ray absorptiometry may be used in pediatrics with high accuracy, sensitivity, and precision. 相似文献
7.
8.
Matsuo T Douchi T Nakae M Uto H Oki T Nagata Y 《Journal of bone and mineral metabolism》2003,21(3):179-183
We investigated the relationship of upper body fat distribution to regional bone mineral density (BMD). Subjects were 361
regularly menstruating premenopausal women with right-side dominance. Age, height, and weight were recorded. Regional (arms,
L2–L4 of the lumbar spine, and legs) BMD, regional (arms, trunk, and legs) lean mass, and the ratio of trunk fat mass to leg
fat mass amount (trunk–leg fat ratio) were measured by dual-energy X-ray absorptiometry. Body fat distribution was assessed
by trunk–leg fat ratio. Trunk–leg fat ratio was positively correlated with regional BMD (r = 0.120–0.216; P < 0.05–P < 0.001) and regional lean mass (r = 0.162–0.229; P < 0.01–P < 0.001). Regional lean mass was more positively correlated with regional BMD (r = 0.319–0.475; P < 0.001). These relationships remained significant after adjusting for age and height. However, correlation of trunk–leg
fat ratio with regional BMD disappeared after additionally adjusting for regional lean mass. In premenopausal women, upper
body fat distribution is associated with higher regional BMD via greater regional lean mass irrespective of age and height.
Received: July 15, 2002 / Accepted: October 29, 2002
Offprint requests to: T. Douchi 相似文献
9.
Y. Zheng C. Wang H. Zhang C. Shao L.-H. Gao S.-S. Li W.-J. Yu J.-W. He W.-Z. Fu Y.-Q. Hu M. Li Y.-J. Liu Z.-L. Zhang 《Osteoporosis international》2016,27(5):1805-1815
Summary
Our objective was to investigate the associations between polymorphisms in Wnt pathway genes and peak bone mineral density (BMD) and body composition in young Chinese men. Our study identified that WNT5B and CTNNBL1 for both BMD and body composition, and WNT4 and CTNNB1 gene polymorphisms contribute to the variation in BMD and body composition in young Chinese men, respectively.Introduction
Our objective was to investigate the associations between polymorphisms in WNT4, WNT5B, WNT10B, WNT16, CTNNB1, and CTNNBL1 genes and peak bone mineral density (BMD), lean mass (LM), and fat mass (FM) in young Chinese men.Methods
Using SNPscanTM kits, 51 single-nucleotide polymorphisms (SNPs) located in the 6 genes were genotyped in a total of 1214 subjects from 399 Chinese nuclear families. BMD, total lean mass (TLM), and total fat mass (TFM) were measured using dual energy X-ray absorptiometry (DXA). The associations between the 51 SNPs and peak BMD and body composition [including the TLM, percentage lean mass (PLM), TFM, percentage fat mass (PFM), and the body mass index (BMI)] were analyzed through quantitative transmission disequilibrium tests (QTDTs).Results
For peak BMD, we found significant within-family associations of rs2240506, rs7308793, and rs4765830 in the WNT5B gene and rs10917157 in the WNT4 gene with the lumbar spine BMD (all P?<?0.05). We detected an association of rs11830202, rs3809269, rs1029628, and rs6489301 in the WNT5B gene and rs2293303 in the CTNNB1 gene with body composition (all P?<?0.05). For the CTNNBL1 gene, six SNPs (rs6126098, rs6091103, rs238303, rs6067647, rs8126174, and rs4811144) were associated with peak BMD of the lumbar spine, femoral neck, or total hip (all P?<?0.05). Furthermore, two of the six SNPs (rs8126174 and rs4811144) were associated with body composition.Conclusions
This study identified WNT5B and CTNNBL1 for peak BMD and body composition in males from the Han Chinese ethnic group, and the results suggest a site-specific gene regulation. The WNT4 and CTNNB1 gene polymorphisms contribute to the variation in peak BMD and body composition, respectively.10.
D. O. Slosman MD R. Rizzoli C. Pichard A. Donath J. -P. Bonjour 《Osteoporosis international》1994,4(4):185-190
The so-called peak bone mass (PBM) represents the highest amount of bony tissue achieved during life at a given site of the skeleton. It has been suggested that PBM might be achieved as late as the fourth decade, but recent data have indicated that PBM is already achieved by the end of sexual maturation, namely at the end of the second decade. The solving of this apparent controversy is of interest for a better understanding of bone homeostasis and for defining the cohort of normal subjects to be evaluated in order to establish a PBM reference range — necessary for the diagnosis of osteoporosis and evaluation of the fracture risk. To study bone mass evolution in young healthy adults and to determine whether such a cohort can be used to establish PBM reference values, we measured bone mineral density (BMD) in sixty 20- to 35-year-old young healthy adults by dual-energy X-ray absorptiometry at the levels of the lumbar spine (in both anteroposterior and lateral views), femoral neck, trochanter region, total hip and of Ward's triangle, as well as whole-body BMD and bone mineral content (BMC) in cross-sectional and longitudinal studies. In the cross-sectional analysis, none of the bone mass variables was dependent on age using linear regression analysis. The longitudinal study indicated that the mean changes in lumbar spine, proximal femur and whole body BMD or BMC determined after a 1-year interval were not statistically different from zero in either females or males aged 20–35 years. In conclusion, the present results confirm that at the levels of lumbar spine and proximal femur, two sites particularly at risk of osteoporotic fractures, PBM can be achieved before the third and fourth decades in both male and female normal subjects. 相似文献
11.
R. B. Mazess W. W. Peppler J. E. Harrison K. G. McNeill 《Calcified tissue international》1981,33(1):353-359
Summary A method was developed for measuring total body bone mineral (TBBM) and lean body mass in vivo using dual-photon absorptiometry.
The entire body was scanned in a rectilinear raster (transverse speed of 1 cm/s and longitudinal steps of 2.5 cm) with a modified
nuclear medicine scanner and conventional nuclear counting electronics. The source was153Gd (1 Ci) with principal photopeaks at 44 and 100 keV. The scan time was about 70 min with an absorbed dose of under 1 mrem.
The low dose allows measurements to be repeated at frequent intervals or used on children. Short-term (months) precision of
TBBM was about 1.5% for isolated skeletons and about 2% on normal human subjects. Long-term (years) precision on skeletons
was under 3%. The precision of percent fat was 0.9%, which would lead to an error of less than 1% in the TBBM. Geometry of
measurements also had minimal (and correctable) influence on the accuracy of results. The accuracy (1 standard error of estimate)
of TBBM on isolated skeletons (N=5) was 36 g (equivalent to about 13 g of Ca) with a correlation coefficient of 0.99; this error amounts to about 1–1.5% in
normal adults, 2% in older women, and 2.5% in osteoporotic females. The dual-photon absorptiometry method could be implemented
in many nuclear medicine departments to follow skeletal changes during growth and aging or to follow the course of a disease
or treatment. 相似文献
12.
Gwy Suk Seo Masataka Shiraki Jun Aoki Osamu Karakida Choju Aoki 《Journal of bone and mineral metabolism》1996,14(3):167-170
Purpose: To evaluate the effect of disuse on bone mineral content (BMC), lean mass, and fat mass.Method and subjects: We obtained BMC, lean mass, and fat mass from measurements of each side of the arm and the leg in 20 women with unilateral hip osteoarthritis and 63 normal women using a whole-body dual-energy X-ray absorptiometry (DXA) scan. The ratio of the affected side to the unaffected side (A-U ratio) was calculated for BMC, lean mass, and fat mass in the arm and the leg.Results: A significant intergroup difference in the A-U ratio was noted for leg BMC (0.85vs 0.99,P<0.01), and for lean mass of the leg (0.88vs 0.99,P<0.01). When leg BMC was adjusted with lean mass, this intergroup difference became insignificant.Conclusion: This study reconfirmed that a decrease in BMC and lean mass can result from disuse. We suggest that a large portion of BMC loss in the immobilized leg might be a secondary change resulting from lean mass loss. 相似文献
13.
Bone mass in young women is dependent on lean body mass. 总被引:1,自引:0,他引:1
Deborah Anne Kerr Shona Papalia Alan Morton Ian Dick Satvinder Dhaliwal Richard L Prince 《Journal of clinical densitometry》2007,10(3):319-326
Relationships between bone mineral density (BMD) and body mass, height, fat mass, and lean mass have been reported. This study examined the relationship between body size and composition on bone density in young premenopausal women. In this study, a cross-sectional design was used. Seventy-one healthy women aged between 24 and 36 yr selected to have a wide range of boy habitus (mean body mass index, 22.7+/-3.0) underwent a dual-energy X-ray absorptiometry (DXA) whole-body bone density scan (Hologic QDR 2000). Their bone density and soft tissue body composition and anthropometric parameters (skinfolds, girths, limb lengths, bone breadths, height, and body mass) were analyzed, and their body composition was assessed by underwater weighing (UWW). Bone-free lean mass (BFLM) determined by DXA was correlated with both bone mineral content (BMC) and BMD (r=0.74, p<0.001; r=0.48, p<0.001, respectively). In addition, fat-free mass (FFM) determined by UWW was correlated with BMC and BMD (r=0.80, p<0.001; r=0.48, p<0.001, respectively). Controlling for height in the model removed most of the correlations with whole-body BMD, with the exception of FFM, BFLM, and shoulder breadth (r=0.39, p<0.001; r=0.37, p<0.01; and r=0.34, p<0.01, respectively). No correlation was found between fat mass by DXA, UWW, and sum of skinfolds and BMD. These results indicate that bone mass in premenopausal women is dependent on lean body mass. 相似文献
14.
Numerous studies indicate that bone mineral density (BMD) is closely related to body mass and its components. Most studies have examined these relationships in women with little attention given to how these relationships differ by gender. The aims of the present study were to use the opposite sex twin model to determine if there were gender differences in the relationship between body composition and its relation to BMD and how any such differences were influenced by age. We measured body composition and bone mass by dual energy X-ray absorptiometry in 93 pairs of opposite sex twins. To examine the effect of age, they were divided into two age groups: under 50 years old (45 pairs) and over 50 years old (48 pairs). Lean mass (LM) had stronger positive relationships with the most bone variables than fat mass in both genders at all ages. Fat mass (FM) had positive relationships with total body and hip BMD in women under age 50, but not over 50. There was no significant relationship between FM and total or regional BMD in men under age 50, but men over 50 showed positive relationships between FM measures and total and some regional BMD measures. Central adiposity showed a positive relationship with BMD in men over 50 and women under 50. Fat mass (FM) and lean mass (LM) and their distribution in the body have different relationships with regional BMD in men and women that differ by age. 相似文献
15.
The potential beneficial effects of increased body weight on bone mineral density (BMD) conflict with the adverse effects of obesity on various health outcomes, necessitating more specific evaluations of the association between each body component and BMD. In the present study, we evaluated associations of lean mass (LM) and fat mass (FM) with BMD in a Korean sample consisting of a total of 1782 men and women whose mean (standard deviation) age was 43.2 (12.6) years. They were selected from the Healthy Twin Study, a nationwide Korean twin and family study. BMD, FM and LM were measured using dual-energy X-ray absorptiometry. Quantitative genetic analysis and linear mixed analysis were performed with respect to familial relationships and a wide range of probable covariates. Linear mixed analysis revealed that BMD was positively associated with both FM and LM at each region of BMD measurement (whole body, spine, arms, and legs) in men, premenopausal women, and postmenopausal women. However, the association with BMD was stronger for LM than FM. Both LM and FM had positive genetic correlations with BMD at each region, although the correlation with BMD tended to be stronger for LM than FM. Together, these findings suggest that increased LM, rather than FM, is more beneficial for BMD in the Korean population and warrants further study of the common genetic determinants of BMD and body composition. 相似文献
16.
Peak bone mass is a major determinant of osteoporotic fracture risk. Gender differences in peak bone mass acquisition are well recognized in humans and may account for a substantial share of the increased prevalence of fragility fractures in women compared with men. Skeletal development is regulated by both heritable and environmental factors. Experimental animal models provide a means to circumvent complicating environmental factors. In this study we examined the heritability of peak bone mineral density (BMD) in genetically distinct laboratory mouse strains raised under strict environmental control and sought to identify genetic loci that may contribute to gender differences in this skeletal phenotype. Peak whole body BMD of male and female mice from a panel of 18 recombinant inbred (RI) strains derived from a cross between C57BL/6 and DBA/2 progenitors (BXD) was measured by dual-energy X-ray absorptiometry (DXA). A highly significant relationship existed between body weight and BMD in the BXD RI mice (r2 = 0.25; p = 1 x 10(-43)). To allow for comparison between male and female RI strains, whole body BMD values were corrected for the influence of body weight. The distribution of weight-corrected BMD (WC-BMD) values among the strains indicated the presence of strong genetic influences in both genders, with an estimated narrow sense heritability of 45% and 22% in male and female mice, respectively. Comparison of RI strain results by two-way analysis of variance (ANOVA) revealed a significant strain-by-gender interaction (F1,17,479 = 6.13; p < 0.0001). Quantitative trait locus (QTL) analysis of the BXD RI strain series provisionally identified nine chromosomal sites linked to peak bone mass development in males and seven regions in females. In two cases, the provisional chromosomal loci were shared between genders, but in most cases they were distinct (five female-specific QTLs and six male-specific QTLs). QTL analysis of a genetically heterogeneous F2 population derived from the B6 and D2 progenitor strains provided additional support for the gender specificity of two loci. A significant phenotype-genotype correlation was only observed in male F2 mice at microsatellite marker D7Mit114 on chromosome 7, and a correlation at D2Mit94 on chromosome 2 was only observed in female F2 mice. The present data highlight the important role of gender in the genetic basis of peak bone mass in laboratory mice. Because the male phenotype is associated with considerable fracture risk reduction, an elucidation of the nature of that effect could provide the basis for novel diagnostic, preventative, or therapeutic approaches. 相似文献
17.
To assess the relationship of total fat mass (TFM) and total lean mass (TLM) with bone mineral density (BMD) and bone mineral
content (BMC), we studied 770 postmenopausal white women after total body measurements by dual-energy X-ray absorptiometry.
Height-independent bone mineral density (HIBMD) was also tested. The effects of TFM and TLM on the dependent variables HIBMD,
BMD, and BMC were assessed by the univariate general linear model (UGLM). Age, age at menopause, height, and bone area were
entered in the models as controlling variables when appropriate. In the total population, TLM and TFM were associated with
BMD, BMC, and HIBMD (P < 0.001). Taking the T-score cut-off as −2.5, women without (463) and with (307) osteoporosis were then tested separately.
In nonosteoporotic women, TLM was significantly associated with BMD, BMC, and HIBMD (P < 0.001), while TFM was not. In osteoporotic women, both TLM and TFM were associated with BMD to the same extent (P < 0.05), but not with HIBMD. Women without osteoporosis were then tested according to whether their TFM/TLM fraction was
less than or greater than 1. In those with TFM/TLM less than 1, both TLM (P < 0.001) and TFM (P < 0.01), tested separately, were associated with BMD and BMC, but not with HIBMD. When TLM and TFM were tested at the same
time and assessed by the same UGLM, only TLM (P < 0.001) still affected these three bone parameters. In women with TFM/TLM greater than 1, testing the body components both
separately and at the same time and using the UGLM showed that TFM affected both BMC and BMD (P < 0.05), while TLM did not. In conclusion, our data indicate that both TFM and TLM affect bone density, with different physiological/pathological
conditions modulating this relationship. 相似文献
18.
The purpose of this study was to determine whether race or gender differences in total body bone mineral content (BMC) are
evident within the first 18 months of age. Total body bone mineral measurements were obtained on 64 healthy infants 1–18 months
of age. There were no significant differences in age, weight, or height between race and gender groups. Taking into account
weight and age, both bone mineral density (BMD) and BMC were greater in male infants compared with female infants (both,P=0.02) and BMD was slightly higher in black infants compared with white infants (P=0.07). 相似文献
19.
The relationship between lean body mass and bone mineral content in paediatric health and disease 总被引:7,自引:0,他引:7
Crabtree NJ Kibirige MS Fordham JN Banks LM Muntoni F Chinn D Boivin CM Shaw NJ 《BONE》2004,35(4):965-972
INTRODUCTION: The correct interpretation of DXA data is critical to the diagnosis and management of children with suspected bone disease. This study examines the various influences on bone mineral content (BMC), as measured by dual-energy X-ray absorptiometry (DXA). MATERIALS AND METHODS: Six hundred and forty-six healthy school children and forty-three children with chronic diseases, aged 5-18 years, had their lumbar spine and whole body measured using a Lunar DPX-L DXA scanner. RESULTS: Stepwise linear regression identified lean body mass (LBM) as the strongest single predictor of BMC in the lumbar spine and the total body. A significant gender difference was observed in the relationship between BMC and LBM with girls having significantly more bone per unit LBM from 9 years of age in the spine and 13 years of age in the total body. To investigate the relationship between LBM and BMC in children with chronic disease, a two-stage algorithm based upon calculation of Z scores from the normative data was applied. Stage 1 assessed LBM for height and stage 2 assessed BMC for LBM. Ten children with spinal muscular atrophy had a mean LBM for height Z score of -1.8(1.4) but a mean BMC for LBM Z score of 1.2(1.3) indicating their primary abnormality was reduced muscle mass (sarcopenia) with no evidence of osteopenia. In contrast, 21 children with osteogenesis imperfecta had a mean LBM for height Z score of 0.4(1.7) but a mean BMC for LBM Z score of -2.5(1.8) indicating normal LBM for size but significantly reduced BMC for LBM (i.e. osteopenia) confirming a primary bone abnormality. A third group consisting of 12 children with low trauma fractures demonstrated little evidence of sarcopenia [mean LBM for height Z score -1.1(2.1)] but significant osteopenia [mean BMC for LBM Z score -1.9(1.5)]. CONCLUSION: The results from this study demonstrate how the relationship between height and lean body mass, and lean body mass and bone mineral content can be a useful method of diagnosing osteoporosis in children and how the relationships can be used to identify if the primary abnormality is in muscle or bone. 相似文献
20.
目的:比较葛根素、白藜芦醇单体与二者的复合药物对大鼠峰值骨量的影响。方法 :选取雌性SPF级Wistar大鼠40只,体重109.45~119.44 g,平均115.87 g,大鼠适应3 d后采用随机数字表法将其分为4组,每组10只,分别为空白对照组(CON组,每日灌胃等体积的蒸馏水),葛根素组(PR组,每日灌胃15.4 mg/kg葛根素),白藜芦醇组(RES组,每日灌胃8.4 mg/kg白藜芦醇),复合药物组(P+R组,每日灌胃8.4 mg/kg白藜芦醇+15.4 mg/kg葛根素复合药)。每7 d监测1次大鼠体重,每月检测1次大鼠全身骨密度。3个月后处死全部大鼠。采用双能X线骨密度仪检测股骨和椎骨离体骨密度;采用万能材料试验机分析骨生物力学;采用VG染色分析骨形态计量学;采用ELISA试剂盒检测血清骨代谢指标及用Micro-CT扫描仪扫描股骨微结构。结果:各组大鼠在实验期间的体重变化无统计学意义;骨密度结果显示:与CON组比较,其余3组股骨和椎骨骨密度均显著升高,且R+P组显著高于PR组和RES组。股骨三点弯曲和椎骨压缩试验结果显示:与CON组相比,其余3组股骨和椎骨最大载荷值均显著升高,且P+R组高于PR组和RES组,而各组间弹性模量值无统计学意义;股骨VG染色结果显示:与CON组相比,其余3组骨小梁数目显著增加,分离度明显减低,且R+P组明显优于PR组和RES组,而各组间骨小梁厚度无显著变化。Micro-CT扫描重建图结果显示:与CON相比,其余3组股骨骨小梁结构紧密,数目较多,分离度小,连续性好,且R+P组显著优于RES和PR组;Micro-CT扫描指标结果显示:与CON组相比,其余3组股骨骨小梁数目(trabecular number,Tb.N)、骨小梁厚度(trabecular thickness,Tb.Th)显著增加,骨小梁分离度(trabecular spacing,Tb.Sp)显著降低,且差异具有统计学意义(P0.05),且R+P组显著优于RES和PR组。血清生化指标结果显示:与CON组相比,其余3组血清中骨钙素(osteocalcin,OC)水平均升高,抗酒石酸酸性磷酸酶5b(TRACP 5b)含量均下降,差异具有显著性,且P+R组显著高于PR组、RES组,而TRACP 5b含量无显著变化。结论:葛根素与白藜芦醇单体按1∶1比例组合而成的复合药在提高青年大鼠峰值骨密度和骨质量,增强骨生物力学性能,促进成骨细胞的矿化成熟,抑制破骨细胞骨吸收方面的药效显著优于葛根素和白藜芦醇单体的作用,表明中药复方或复合药将作为预防和治疗骨质疏松的新途径。 相似文献