摘要
【目的】探讨0~10岁儿童维持正常骨代谢的最佳25羟-维生素DE25-(OH)D]水平,为临床评估维生素D营养状况和合理使用维生素D制剂提供参考。【方法】以142名0~10岁健康和患呼吸系感染性疾病儿童为研究对象,抽取空腹静脉血检测血清中甲状旁腺激素(PTH)、骨碱性磷酸酶(BAP)、25-(0H)D、血钙、血磷的水平。通过分析25-(OH)D与甲状旁腺激素(PTH)、骨碱性磷酸酶(BAP)、钙磷浓度积(Ca×P)的量-量反应曲线确定维持正常骨代谢的最佳25-(0H)D水平。【结果】25-(OH)D与PTH、BAP的量-量反应曲线显示,在25-(OH)D≤50nmol/L时,PTH、BAP和25-(OH)D水平均显著相关(rPTH=-0.864,P〈0.01;rRAP=-0.856,P〈0.01),50nmol/L.〈25-(OH)D〈60nmol/L时,血清PTH、BAP保持在一稳定水平。25-(OH)D与钙磷浓度积(Ca×P)的量量反应曲线显示,25一(OH)D≤50nmol/L时,钙磷浓度积随25-(0H)D水平增加而增高,但相关分析显示两者无显著相芙关系(r=0.037.P〉0.05)。在50nmol/L〈25-(0H)D〈60nmol/L时,钙磷浓度积保持在一较稳定水平。【结论】南京市0~10岁年龄段儿童中,血清25-(OH)D水平在50~60nmol/L时可能是维持正常骨代谢的最佳浓度。
[Objective] To explore the optimal serum 25-(OH)D concentration of children. [Methods] All sub- jects (76 were healthy,66 were suffering from respiratory system infection) aged 0~10 years were enrolled in this study during 2007/12~2008/03. Venous blood samples were collected from subjects before breakfast in the morning and the levels of serum 25- ( OH ) D, intact parathyroid hormone ( PTH ), bone specific alkaline phosphatase (BAP), calcium(Ca), phosphorus(P) were determined by ELISA. [Results] The response curves of 25-(OH)D concentration vs PTH concentration,25-(OH)D concentration vs BAP concentration showed that, when 25 (OH)D ≤ 50 nmol/L, PTH and BAP were both significantly negative correlated with 25 (OH) D(rPTH =-0. 864, P〈 0.01 ; rBAP =-0. 856, P〈0. 01 ). When 50 nmol/L (25-(OH)D(60 nmol/L,PTH and BAP levels kept almost steady. The response curve of 25 (OH)D vs Ca×P product showed that, when 25-(OH)D ≤ 50 nmol/L,Ca×P product rose as 25-(OH)D increases(r=0. 037,P〉0.05),when 50 nmol/L(25-(OH)D〈60 nmol/L,CaXP product kept in a certain level. [Conclusions] The optimal 25 (OH)D level is 50-60 nmol/L for bone health in Nanjing children.
出处
《中国儿童保健杂志》
CAS
2009年第6期624-626,共3页
Chinese Journal of Child Health Care
基金
江苏省卫生厅科技项目(H200321)