Clin Cancer Res:根据患者来源移植瘤的植入情况预测患者的肿瘤复发风险?

2021-09-07 Nebula MedSci原创

耐药性肿瘤患者来源的移植瘤的植入成功与否,或可预测患者的肿瘤复发风险

患者来源的异种移植瘤 (PDX) 是研究不同实体肿瘤生物学和药物反应表型的重要工具。很多因素都可影响 PDX 植入小鼠模型的成功率。虽然来源于更具侵袭性特征的患者肿瘤的 PDX 的植入率更高,但目前尚不确定植入是否可以预测患者的癌症复发风险。

这是一项关于采用新辅助化疗(NAC;紫杉烷±曲妥珠单抗)继以蒽环类化疗治疗的乳腺癌患者的研究,本文报告了乳腺癌复发事件与 PDX 植入率之间的关联。本研究的 PDX 分为两类,一是来源于未治疗过的患者(NAC 治疗前取的活检样本,n=113),另一类是来源于治疗耐药性的患者(NAC 治疗后手术时收集的样本,n=34)。

根据PDX植入与否分组的乳腺癌复发事件的累积发生率

中位随访了 5.7 年,共有 17 位患者报告了原位或局部复发或远处转移事件。在 NAC 前的 PDX 亚组中,根据 PDX 成功植入与否分组,受试患者乳腺癌的累积复发率没有显著差异(5 年复发率:13.6% vs 13.4%;p=0.89)。三阴性乳腺癌(TNBC)患者的 NAC 前的 PDX 的植入率更高,但 PDX 植入的成功与否也无法区分患者的复发率(5 年复发率:21.4% vs 16.2%,p=0.73)。

NAC治疗后有残余病灶的患者的乳腺癌事件累积发生率

在 NAC 后的 PDX 亚组中,PDX 成功植入的患者的乳腺癌事件的发生率更高(5年复发率:50.0% vs 19.6%),但没有统计学差异(p=0.11)。

综上,对于接受标准 NAC 治疗的初治乳腺癌患者,PDX 植入不能预测乳腺癌的复发率。治疗耐受性患者来源的 PDX 的植入成功与否,或可预测患者的复发风险,需要进一步研究。

原始出处:

Judy C. Boughey, et al. Patient-Derived Xenograft Engraftment and Breast Cancer Outcomes in a Prospective Neoadjuvant Study (BEAUTY). Clin Cancer Res September 1 2021 27 (17) 4696-4699; DOI:10.1158/1078-0432.CCR-21-0641

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    2021-09-07 1453df99m58暂无昵称

    患者来源的异种移植瘤 (PDX) 是研究不同实体肿瘤生物学和药物反应表型的重要工具。

    0

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    2021-09-07 学习无止境

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