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阿仑膦酸钠减少前列腺癌因接受ADT疗法引起的骨密度降低

2012-09-29 网络 网络

  研究结果显示,每周服用双磷酸盐阿仑膦酸钠可以减少前列腺癌患者因开始接受雄激素-阻断疗法(ADT)而引起的骨密度降低。这个为期1年的试验,统计了加拿大30个泌尿学网站的数据,结果表明这种治疗方法不仅能够预防骨质疏松和增加骨密度,而且可以降低骨转换。   Laurence Klotz(加拿大,多伦多,Sunnybrook Health Sciences Centre)和他的团队解释道,患者在最初

  研究结果显示,每周服用双磷酸盐阿仑膦酸钠可以减少前列腺癌患者因开始接受雄激素-阻断疗法(ADT)而引起的骨密度降低。这个为期1年的试验,统计了加拿大30个泌尿学网站的数据,结果表明这种治疗方法不仅能够预防骨质疏松和增加骨密度,而且可以降低骨转换。

  Laurence Klotz(加拿大,多伦多,Sunnybrook Health Sciences Centre)和他的团队解释道,患者在最初接受ADT疗法时,面临着骨密度降低和骨质疏松性骨折的风险,然而对于这些不良反应,大部分患者没有接受任何针对性的治疗。该小组对167名开始接受ADT治疗的患者进行意向治疗分析,这些患者被分配每周一次服用70mg阿仑膦酸钠或安慰剂。同时,所有患者每日服用钙1g,维生素D 400IU。

  正如欧洲泌尿学网站的报道,阿仑膦酸钠组患者脊柱平均BMD较基线期增加了1.7%,安慰剂组的脊柱平均BMD较基线期减少了1.9%。同样,阿仑膦酸钠组患者髋关节平均BMD增加了0.7%,而安慰剂组降低了1.6%。阿仑膦酸钠组患者的骨质吸收,骨生成和骨转移标志物都有明显的增加。骨吸收标志物,交联I型胶原N末端肽(NTx),阿仑膦酸钠组平均降低了3.5%,而安慰剂组平均增加了16.5%。基线期的尿中Ntx含量是对BMD损失的明显预测。

  此外,骨特异性碱性磷酸酶,即骨生成和骨转换的标志物水平,阿仑膦酸钠组平均降低了2.25%,而安慰剂组平均增加了3.12%。Klotz 和他的同事说“之前的流行病学研究表明,骨转换高是引发骨质疏松性骨折的独立风险因素”。这个研究小组总结说“在ADT治疗过程中,由于BMD的损失会引起骨折风险增加,而且不是口服钙和维生素D补充剂就可以缓解的。因此口服二磷酸盐的治疗方法可能对雄激素阻断患者起到一定作用”。

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