JTO:肿瘤低代谢预示早期非小细胞肺癌患者更高生存率

2015-03-31 Zhang JL译 MedSci原创

功能分子影像是从分子水平在活体研究细胞功能代谢的全新领域,是分子生物学、生物化学、数据图象处理等多学科融合的结果。正电子发射断层扫描(Positron emission tomography, PET)即是功能分子影像的代表,它可显示机体及病灶组织的细胞代谢、增值状况,是非常灵敏的诊断及评价肿瘤生物学特性的先进的分子影像技术。PET能在肿瘤大小改变之前即能检测到其功能代谢异常,能够为临床提供定位、

功能分子影像是从分子水平在活体研究细胞功能代谢的全新领域,是分子生物学、生物化学、数据图象处理等多学科融合的结果。正电子发射断层扫描(Positron emission tomography, PET)即是功能分子影像的代表,它可显示机体及病灶组织的细胞代谢、增值状况,是非常灵敏的诊断及评价肿瘤生物学特性的先进的分子影像技术。


PET能在肿瘤大小改变之前即能检测到其功能代谢异常,能够为临床提供定位、定性和定量资料,是目前得到最广泛应用的功能分子影像手段,在肺癌的诊断、治疗监测和判断预后等方面具有重要作用。

据最新研究报道,通过应用能够评价代谢活动的一个指标——肿瘤对带标记葡萄糖模拟物的摄取能力发现,Ⅰ期非小细胞肺癌(NSCLC)患者术前肿瘤葡萄糖摄取率与患者整体生存率和肿瘤复发时间相关。标记葡萄糖高摄取率患者可能需要在接受手术治疗后再接受额外的辅助治疗。该研究发表在最新一期Journal of Thoracic Oncology杂志上。

对于Ⅰ期NSCLC患者来说,手术治疗是标准的治疗方案。然而,手术并不能让所有的病人都获得治愈,既往研究显示这些患者的5年生存率不到60%。显然,需要有一个诊断测试来确定哪些患者应该接受术后治疗(如化疗),而哪些病人不需要进一步治疗,从而避免不必要的治疗相关毒副作用和并发症。Fluorodeoxyglucose(FDG)放射性标记的模拟可以测量肿瘤内的葡萄糖浓度,它可以通过正电子发射断层扫描(PET)成像扫描仪来进行测量。

杜克大学医学中心的研究人员进行了一项回顾性队列研究,分析2005年和2010年之间的336名诊断为Ⅰ期非小细胞肺癌的患者的资料。该群患者在术前90天内通过PET测定其肿瘤摄取FDG的量以计算最大标准摄取值(SUVmax),并分析其与总生存期或复发时间之间的联系。平均随访时间为5.1年。

该项研究表明,SUVmax下降与死亡和复发的风险降低相关,P值分别为0.0008和0.24。据估计,对比SUVmax最低四分位数的8%,22.5% SUVmax高于中位数的患者将在手术治疗后2年内复发;而对比SUVmax最低四分位数的77%,仅有41% SUVmax第三四分位数的患者能够在手术治疗5年内存活。

该研究的作者总结说:“I期非小细胞肺癌的FDG/PET SUVmax测试能够预测生存期以及复发时间。这个参数可以作为生物标志以指导患者术后化疗或其他更积极治疗的选择。”然而,IASLC成员、该研究的另一位作者Edward Patz博士指出:“仍需要进一步前瞻性临床试验来研究SUVmax在早期肺癌中对预后评估的参考作用。”

原始出处:

Woocheol Kwon, Brandon A. Howard, James E. Herndon, Edward F. Patz. FDG Uptake on Positron Emission Tomography Correlates with Survival and Time to Recurrence in Patients with Stage I Non-Small Cell Lung Cancer. Journal of Thoracic Oncology, 2015; 1 DOI: 10.1097/JTO.0000000000000534

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    2015-05-24 ljjj1053

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肺癌是世界上最常见的恶性肿瘤之一,非小细胞肺癌约占所有肺癌的80 %,约75 %的患者发现时已处于中晚期,5年生存率很低。化疗与放射治疗是肺癌的主要治疗方法。为了探究对不能进行手术的III期非小细胞肺癌患者进行标准剂量或高剂量适形放射治疗同时给予卡铂与紫杉醇化疗以及额外补充西妥昔单抗的治疗效果,比较整体生存率,美国华盛顿大学的Jeffrey D Bradley研究组牵头,美国和加拿大共185个

Lung Cancer:EGFR酪氨酸激酶抑制剂用于EGFR阳性突变的非小细胞肺癌的安全性分析

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