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《Journal of Central South University(Medical Sciences)》 2008-01
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Biochemical markers of age-related changes in bones turnover and bone mineral density in healthy Chinese men

JIANG Yue-xia 1,2,TANG Si-yuan 1,WU Xian-ping 2,YANG Ling-feng 2,LIAO Er-yuan 2(1.School of Nursing,Central South University,Changsha 410013;2.Institute of Endocrinology and Metabolosm,Second Xiangya Hospital,Central South University,Changsha 410011,China)  
Objective To determine the relationship between bone alkaline phosphatase(BAP)and cross-linked N-telopeptides of type I collegen(NTX)and bone mineral density in healthy men aged 20~80.Methods BAP and NTX of 389 healthy men were measured by ELISA.BMD at the lumbar spine and the hip as measured by dual energy X-ray absorptiometry.The correlation of bone biochemical markers with age and BMD fit 10 regression models.Results BAP and NTX negatively correlated with age.The cubic regression model was better with age-related changes of bone biochemical markers as compared with the other regression models and the coefficients of determination of fitting curve were 0.013~0.029(P 0.05).The value of bone biochemical markers as the highest during 20~29 age groups,then they decreased to a nadir level in the 50~59 years age.After 60 years,bone formation markers remained stable;however resorption marker increased slightly.After adjustment for age,weight,height,BMI,and smoking,bone biochemical markers were negatively correlated with most sites of BMD.Conclusion BAP and NTX may be relatively sensitive and specific markers to evaluate age-related changes of bone turnover.It may benefit the prevention of osteoporosis by monitoring the level of BAP and NTX.
【CateGory Index】: R580
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