J Bone Miner Res:地诺舒单抗治疗骨质疏松症后用唑来膦酸盐治疗效果研究

2022-01-14 医路坦克 MedSci原创

在停止使用denosumab(DMAB)的患者中,骨转换迅速增加,在治疗过程中增加的骨量在12到24个月内丢失。因此建议停用DMAB的患者应该接受双膦酸盐的后续治疗,并密切监测。

      在停止使用denosumab(DMAB)的患者中,骨转换迅速增加,在治疗过程中增加的骨量在12到24个月内丢失。DMAB是一种全人IgG2单克隆抗体,可以中和核因子kappa-B配体(RANKL)的受体激活剂。在这一阶段,还报告了反弹骨转换相关脊椎骨折(VFX)的风险增加。我们以前已经证明,在停止使用DMAB的长期治疗后,在最后一次注射DMAB后6个月或9个月或骨转换增加时输注唑来膦酸盐(ZOL),在任何治疗组中都不足以维持对骨转换标志物(BTM)的抑制,并在注射ZOL 12个月后完全防止骨丢失。观察研究表明,反弹现象持续1-2年,因此我们在第一次注射ZOL后对患者进行了24个月的跟踪调查,以评估期间BTM和骨密度(BMD)的变化。观察研究表明,反弹现象持续1-2年,因此我们在第一次注射ZOL后对患者进行了24个月的跟踪,以评估期间BTM和骨密度(BMD)的变化。在整个2年的研究期间,如果p-交联型C端末端肽(p-CTx)增加≥1.26μg/L或骨密度降低≥5%,则再给药一次。此外,我们还研究了高分辨率外周定量计算机断层扫描(HR-pQCT)骨微结构和强度测量的变化是否可以为从DMAB治疗到ZOL治疗的最佳过渡提供进一步的证据。

    我们调查了唑来膦酸盐(ZOL)在停用地诺单抗后维持骨密度(BMD)的长期疗效。在这项随机的、开放标签的干预性研究中,我们包括61名绝经后妇女和50岁以上的男子,在4.6±1.6年后停止使用地诺单抗。我们在最后一次Denosumab后6个月(6个月)或9个月(9个月)或在骨转换增加时使用ZOL(观察组[OBS])。当p-交联C端肽(p-CTx)增加≥1.26μg/L或骨密度降低≥5%时,给予ZOL治疗。12个月后的结果先前已发表;这里我们报告24个月后的结果(临床试验NCT03087851)。58名患者完成了这项研究。从最初的ZOL治疗12个月到24个月,6M、9M和OBS组的腰椎骨密度分别维持在0.9±0.9%、0.4±0.8%和0.3±0.7%(p>0.05,组间无差异)。同样,在第2年期间,任何组的全髋部(TH)和股骨颈(FN)骨密度没有改变。从基线到ZOL后24个月,6个月、9个月和OBS组的LS骨密度分别下降了4.0±0.8%、4.1±0.8%和4.3±1.5%(p<0.001,组间无差异)。ZOL后24个月,各组均有明显的骨丢失(LS、TH或FN):6M组12例(60%),9M组7例(37%),OBS组10例(53%)。P-CTX在第二年没有显著变化(p>0.05,组间无差异)。第二年没有患者达到CTX或骨折再治疗的标准;然而,有9名患者由于骨密度丢失≥5%而在M24再次接受治疗。两名患者在第二年发生了非脊椎骨折。在长期使用denosumab后使用ZOL治疗在第一年不能完全防止骨转换增加和骨丢失;然而,CTX保持在参考范围内,第二年骨密度保持不变。

    部分ZOL患者停用长期DMAB后第1年按3种不同方案治疗和复治后,第2年骨密度均维持在绝经前参考区间内,CTX稳定在绝经前参考区间内。治疗24个月后,脊柱骨丢失平均为4.2%,全髋骨平均骨丢失为3.8%,三种治疗方案之间无明显差异。骨丢失比未经治疗的患者要少,因此建议停用DMAB的患者应该接受双膦酸盐的后续治疗,并密切监测。

文献来源:Sølling AS,  Harsløf T,  Langdahl B,Treatment With Zoledronate Subsequent to Denosumab in Osteoporosis: A 2-Year Randomized Study,J Bone Miner Res 2021 Jul;36(7) 

 

 

 

 

 

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    2022-10-16 apoenzyme
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    2022-01-16 Eleven17

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