Prostate:镭223进行再治疗的耐受性良好

2020-04-22 MedSci原创 MedSci原创

二氯化镭-223(镭-223)被批准用于无症状骨转移、无内脏病变、耐受性前列腺癌(CRPC)、无症状骨转移、无内脏病变的患者,剂量为6次注射(静脉注射55 kBq/kg;每4周注射1次)。国际开放标签

二氯化镭-223(镭-223)被批准用于无症状骨转移、无内脏病变、耐受性前列腺癌(CRPC)、无症状骨转移、无内脏病变的患者,剂量为6次注射(静脉注射55 kBq/kg;每4周注射1次)。国际开放标签,1/2期研究NCT01934790的早期结果表明,镭223的再治疗耐受性良好,对疾病进展具有有利影响。在这里,我们报告了对镭223再治疗研究进行2年随访的安全性和有效性研究结果。

 

完成CRPC和骨转移的患者,先完成6次初始Ra-223注射,但骨骼无疾病进展,然后再进行,只要符合血液学参数,则可以接受Ra-223再治疗(最多6次额外的Ra-223注射)。镭223初始疗程后未进行足够的化疗。再治疗期间不允许使用伴随的细胞毒剂,但在随访期间应由研究者酌情允许。研究者可酌情允许其他前列腺癌伴随药物(包括醋酸阿比特龙或恩杂鲁胺)使用。主要研究目标是安全性。探索性研究目标包括放射成像骨骼发展的时间,放射成像无进展的生存时间(rPFS),达到总碱性磷酸酶(tALP)的时间,以及前列腺特异性抗原(PSA)的进展,总体生存时间(OS),到第一次有症状骨骼事件的时间( SSE)和无SSE的生存率,均从重新治疗开始计算。安全性和探索性疗效目标的评估包括积极的2年随访。报告了积极随访和更新的疗效带来的安全性结果。

 

结果显示,总共44例患者接受了镭223治疗。29例(66%)完成了全部6次注射,34例(77%)进入了2年的积极随访期,在此期间未发现新的安全隐患,也未发现严重的与药物相关的不良事件。在44名患者中,有19名(43%)发生rPFS事件(进展或死亡)。 rPFS中位数为9.9个月。在44例患者中,有5例(11%)发生了影像学上的骨进展。OS中位数为24.4个月。首次SSE和无SSE生存的中位数时间分别为16.7和12.8个月。未达到tALP进展的中位时间;PSA进展的中位时间为2.2个月。

 

综上所述,该研究结果表明,在此选定的患者人群中,镭223的再治疗耐受性良好,血液学毒性降至最低,并在2年的随访中为骨骼提供了持续的疾病控制。

 

原始出处:

 

Oliver SartorDaniel Heinrich, et al., Re-treatment With radium-223: 2-year Follow-Up From an International, Open-Label, Phase 1/2 Study in Patients With Castration-Resistant Prostate Cancer and Bone Metastases. Prostate. 2019 Oct;79(14):1683-1691. doi: 10.1002/pros.23893. Epub 2019 Aug 23.

 

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    2020-04-24 lsndxfj
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    2020-04-24 whmdzju
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    2020-04-24 hywen7331
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    2020-04-24 sunylz