肿瘤第一线 · 学术知识传播

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Am J Clin Oncol:Meth-ctDNA或是晚期直肠癌潜在的预后标志物

2021-12-16 MedSci原创 MedSci原创

对于局部晚期直肠癌来说,长期预防疾病的转移仍然是一个挑战,并且缺乏强有力的转移性进展的治疗前预后因素。我们推测,基于神经肽Y基因的低甲基化(meth-ctDNA)检测循环肿瘤特异性DNA(ctDNA)

对于局部晚期直肠癌来说,长期预防疾病的转移仍然是一个挑战,并且缺乏强有力的转移性进展的治疗前预后因素。我们推测,基于神经肽Y基因的低甲基化(meth-ctDNA)检测循环肿瘤特异性DNA(ctDNA)可以成为新辅助治疗环境下的预后标志物;我们在一项前瞻性试验的二次探索性分析中对此进行了研究。

在一项针对局部晚期直肠癌的III期试验中前瞻性地收集了血清样本。估计了基线样本中甲状腺ctDNA的阳性和部分丰度。比较了meth-ctDNA阳性和阴性患者的总生存期(OS)和远处转移率;在多变量Cox回归中控制了其他预后因素。通过考虑meth-ctDNA相对于总循环DNA的分量丰度来考察定量负荷的重要性。

结果显示,146名患者的基线血清样本可用。总共有30名患者存在甲基-ctDNA,与cT(P=0.8)或cN(P=0.6)阶段没有相关性。中位随访的OS为10.6年,无远处转移为5.1年。甲状腺ctDNA患者的5年OS明显更差(47% vs. 69%),即使控制了其他预后因素(OR=2.08;95%置信区间,1.23-1.51)。这似乎主要是由远处转移率的差异所驱动(5 y时55% vs. 72%,P=0.01);在多变量分析中,OR=2.20(95%置信区间,1.19-4.07,P=0.01)。量化负荷的增加对较差的结果有高度显著性。

总之,Meth-ctDNA可能是新辅助环境中潜在的预后标志物,如果得到验证,可能会识别远处转移风险增加的患者。

原始出处:

Ane L Appelt, Rikke F Andersen,et al., Prognostic Value of Serum NPY Hypermethylation in Neoadjuvant Chemoradiotherapy for Rectal Cancer: Secondary Analysis of a Randomized Trial. Am J Clin Oncol. 2020 Jan;43(1):9-13. doi: 10.1097/COC.0000000000000609.

 

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    2022-06-22 minlingfeng
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    2022-02-12 仁医06
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