Prevalence and risk factors of hyperuricemia in physical examination group of Zhangjiakou / 预防医学

Objective To investigate the prevalence and risk factors of hyperuricemia in physical examination group of Zhangjiakou, and to provide evidence for the prevention of hyperuricemia. Methods The physical examination people in the Number One Hospital of Zhangjiakou were selected as the research objects from May 2016 to May 2017 . Their physique indexes such as height, weight and blood pressure were tested, and their blood sample were collected and biochemical indexes such as fasting plasma glucose (FPG), blood uric acid (UA), triglyceride (TG) and total cholesterol (TC) were detected. Logistic regression model were used to analyze the influencing factors of hyperuricemia. Results A total of 17273 examinees were recruited, with the average age of (47.42±14.28) years. There were 10324 men (59.77％) and 6949 women (40.23％) . The prevalence rate of hyperuricemia was 22.14％. The prevalence rate of hyperuricemia in men was 28.39％, higher than that of women (12.87％) (P<0.001) . Logistic regression analysis showed that obesity/overweight (OR=2.206, 95％ CI: 1.986-2.450), high TG (OR=2.089, 95％CI: 1.903-2.293) and high TC (OR=1.121, 95％CI: 1.006-1.249) were risk factors of the male patients with hyperuricemia, while the elderly (OR=0.982, 95％CI: 0.979-0.985) and high FPG (OR=0.657, 95％ CI: 0.587-0.736) were protective factors. The risk factors of the female patients with hyperuricemia were the elderly (OR=1.008, 95％CI: 1.001-1.014), obesity/overweight (OR=2.193, 95％CI: 1.864-2.579), high FPG (OR=1.379, 95％CI: 1.128-1.687) and high TG (OR=2.209, 95％ CI: 1.879-2.597) . Conclusion The prevalence of hyperuricemia among residents in Zhangjiakou of Hebeiis high. Overweight / obesity and high TG are the risk factors for hyperuricemia.

Effect of 50 Hz 1.8 mT sinusoidal electromagnetic fields on bone mineral density in growing rats / 中国骨伤

<p><b>OBJECTIVE</b>To study effects of 50 Hz 1.8 mT sinusoidal electromagnetic fields (SEMFs) on bone mineral density (BMD) in SD rats.</p><p><b>METHODS</b>Thirty SD rats weighted(110±10) and aged 1 month were randomly divided into control group and electromagnetic field group, 15 in each group. Normal control group of 50 Hz 0 mT density and sinusoidal electromagnetic field group of 50 Hz 1.8 mT were performed respectively with 1.5 h/d and weighted weight once a week, and observed food-intake. Rats were anesthesia by intraperitoneal injection and dual energy X-ray absorptiometry were used to detect bone density of whole body, and detected bone density of femur and vertebral body. Osteocalcin and tartrate-resistant acid phosphatase 5b were detected by ELSA; weighted liver, kidney and uterus to calculate purtenance index, then detected pathologic results by HE.</p><p><b>RESULTS</b>Compared with control group, there was no significant change in weight every week, food-intake every day; no obvious change of bone density of whole body at 2 and 4 weeks, however bone density of whole body, bone density of excised femur and vertebra were increased at 6 weeks. Expression of OC was increased, and TRACP 5b expression was decreased. No change of HE has been observed in liver, kidney and uterus and organic index.</p><p><b>CONCLUSIONS</b>50 Hz 1.8 mT sinusoidal electromagnetic fields could improve bone formation to decrease relevant factors of bone absorbs, to improve peak bone density of young rats, in further provide a basis for clinical research electromagnetic fields preventing osteoporosis foundation.</p>

Effect of sinusoidal electromagnetic field on bone mineral density and histomorphometry of rats at different time points / 中国医学科学院学报

<p><b>OBJECTIVE</b>To investigate the effect of 50 Hz 0.1 mT sinusoidal electromagnetic field at different time points on bone mineral density(BMD)and histomorphometry in rats.</p><p><b>METHODS</b>Totally 50 6-week-old female SD rats were equally randomized into 5 groups: control group,45-minute group,90-minute group,180-minute group,and 270-minute group. Except for the control group,the other four groups were given magnetic intervention in the 50-Hz 0.1-mT sinusoidal electromagnetic field for 45 minutes,90 minutes,180 minutes,or 270 minutes,respectively,on a daily basis. After 8 weeks,the total body BMD,femur BMD,and vertebral BMD were measured by dual-energy X-ray absorptiometry. The left tibia and the fifth lumbar vertebrae were separated for bone tissue static and dynamic analyses.</p><p><b>RESULTS</b>Compared with control group,the 90-minute group and the 180-minute group had significantly different total body BMD(P<0.01,P<0.05),while no such significant difference was seen in the 45-minute group and 270-minute group (P>0.05). The femur,vertebral BMD,serum biochemical markers,and the static parameters of the fifth lumbar vertebrae tissue showed significant differences in the 90-minute group,180-minute group,and 270-minute group(P<0.01),but not in the 45-minute group (P>0.05). As shown by double fluorescent labeling,the distance was sorted in an order of 90-minute group>180-minutes group>270-minute group>45-minutes group>control group.</p><p><b>CONCLUSION</b>The 50-Hz 0.1-mT sinusoidal electromagnetic field can effectively increase bone mineral density and improve bone morphology;however,the intervention effectiveness differs at different time points,with the best effectiveness seen at 90 minutes.</p>

Effect of different-intensity SEMFs on bone mineral density and histomorphometry in SD rats / 中国骨伤

<p><b>OBJECTIVE</b>To investigate the effects of different-intensity sinusoidal electromagnetic fields (SEMFs) on bone mineral density (BMD) and histomorphometry in SD rats.</p><p><b>METHODS</b>Thirty female SD rats were randomly divided into three groups: group A (a control group), group B (0.1 mT group) and group C (0.6 mT group). The rats in group B and C were exposed to 50 Hz SEMFs 3 hours each day. However,the magnetic intensity was different between group B and group C:0.1 mT for group B and 0.6 mT for group C. After 8 weeks, all the animals were killed. Changes of BMD and histomorphometric properties were observed.</p><p><b>RESULTS</b>Compared with group A, the BMD of whole body, femur and vertebrae of rats in group B increased significantly; the area percentage, number and width of bone trabeculae in vertebrae and femur of rats in group B were larger than those of group A; but the resolution of bone trabeculae of rats in group B was lower than that of group A. The trabecular number in group C rats were significantly decreased, compared with that in group A rats. The outcome of double fluorescence labeling in group B was found to be significantly different with that in group A. But the difference between rats in group A and C was not significant.</p><p><b>CONCLUSION</b>This study demonstrates that 50 Hz 0.1 mT SEMFs can increase BMD, improve bone tissue microstructure and, promote bone formation.</p>

Gly14-humanin protects against Aβ₃₁₋₃₅-induced impairment of spatial learning and memory in rats / 生理学报

Amyloid β protein (Aβ) is closely involved in the pathogenesis of Alzheimer's disease (AD), and one of the main strategies for AD treatment is antagonizing the neurotoxicity of Aβ or even clearing the Aβ deposited in the brain. The present study was aimed to observe the effects of intrahippocampal injection of Aβ₃₁₋₃₅ on the spatial learning and memory of rats by using Morris water maze technique, and explore the neuroprotective effects and possible mechanism of [Gly14]-humanin (HNG) against Aβ-induced deficits in learning behavior. The results showed that bilateral intrahippocampal injection of 2.0 nmol Aβ₃₁₋₃₅ significantly increased the mean traveled distance of rats in searching for the hidden underwater platform and decreased the distance percentage in the target quadrant in probe test after withdrawal of platform, whereas pretreatment with HNG (0.2 nmol and 2.0 nmol) suppressed Aβ₃₁₋₃₅-induced increase in the traveled distance and decrease in swimming distance percentage. Application of Genistein (40 nmol), a specific tyrosine kinase inhibitor, almost completely blocked the antagonistic effects of HNG against Aβ₃₁₋₃₅. These results indicate that HNG can dose-dependently prevent against Aβ₃₁₋₃₅-induced impairment in spatial learning and memory of rats, and the neuroprotective effects of HNG might involve the activation of endogenous tyrosine kinase pathway, suggesting that up-regulation of the tyrosine kinase signaling by using HNG might be of great significance for the improvement of cognitive function in AD.