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BMC Cancer:转移性乳腺癌伴有内脏转移使用白蛋白紫杉醇的疗效和安全性

2021-12-19 yd2015 MedSci原创

研究表明了白蛋白紫杉醇治疗MBC患者伴有内脏转移的良好疗效和安全性,为相关临床实践提供了证据。一线治疗的患者治疗效果较好。

内脏转移占转移性乳腺癌(MBC)患者的48-67%,并且预示着较差的总生存期。既往的研究表明白蛋白紫杉醇对内脏转移患者亚组有潜在的作用。复旦大学上海肿瘤中心开展了II期研究,旨在探讨白蛋白结合紫杉醇对此类高危患者的有效性和安全性。相关结果发表在BMC Cancer杂志上。

在这项前瞻性、单中心、开放标签、II期研究(NCT 02687490)中,MBC合并脏器转移的患者(N = 80)接受白蛋白结合型紫杉醇治疗(Abraxane, 125mg/m2, D1, D8, D1528天为一周期)。主要研究终点为PFS;次要研究终点为ORROS和安全性。PFS定义为从研究登记到疾病进展或任何原因死亡的时间。OS定义为从研究登记到因任何原因死亡的时间。安全性评价为不良事件(AEs),根据CTCAE 4.03版本评估。

20163月到20209月,本研究纳入80例患者。所有患者都接受了至少一剂量的研究治疗,并可进行毒性和应答评估。患者的平均年龄为52(26 - 86)大多数患者雌激素受体(ER)/孕酮受体(PR)阳性(76.3%),三阴性(22.5%),人表皮生长因子2 (HER2)阳性2例(2.5%)。多数患者为ECOG 0-1,肝转移占67.5%,其次为肺转移(61.3%)和脑转移(6.3%)。患者通常有3个或更多转移部位(62.5%)。只有15%患者白蛋白紫杉醇联合其他药物治疗。

             联合治疗药物

中位PFS为5.1个月(95% CI: 4.2 6.0个月)。PR患者26例(32.5%),SD患者27例(33.8%),PD患者27例(33.8%),ORR为33.8% (95% CI 21.3 43.8%), CBR为66.2% (95% CI 56.3 75.0%)。中位OS尚未达到。

                 PFS

               疗效评估

亚组分析显示,luminal亚型患者的中位PFS为5.1个月(95% CI 4.2 6.0), TNBC为4.1个月(95% CI 1.5 6.7) (p = 0.8)。由于样本量的原因,无法获得HER2+患者的中位PFS。一线接受白蛋白紫杉醇治疗的患者较二线治疗的PFS更长,分别为12.5个月(95% CI:3.8-21.1) 和4.6个月(95% CI:3.7-5.5)(P =0.007)。脑转移患者的预后较其他患者较差[2.8个月(95% CI:1.0 4.6) vs 5.1个月(95% CI: 4.3 5.9), P = 0.004]。与绝经前女性(3.6个月,95% CI 1.3 5.8, P = 0.051)相比,绝经后女性有更长的PFS(5.4个月,95% CI 3.9-6.8)。

                亚组分析预后

多因素分析显示非脑转移(调整后的HR 0.31, 95% CI 0.12-0.83, P= 0.019)和一线治疗(调整后的HR 0.37, 95% CI 0.17 0.81, P= 0.013)是PFS的良好独立预测因素。

最常见的治疗相关的≥2级毒性是中性粒细胞减少(42.5%)、感觉神经病变(18.8%)、疲劳(6.2%)、白细胞减少(6.2%)、关节痛/肌痛(5%)和腹泻(5%)。肺部感染2(2.5%),可能是中性粒细胞减少所致。2(2.5%)患者出现皮疹,可能与过敏有关。8例患者(10%)观察到4级血液学毒性。仅有1(1.2%)发生4级感觉神经病变。

              毒性

综上,研究表明了白蛋白紫杉醇治疗MBC患者伴有内脏转移的良好疗效和安全性,为相关临床实践提供了证据。一线治疗的患者治疗效果较好。对于绝经前状态或脑转移的患者,可能需要进一步的选择(例如联合化疗或靶向治疗)。本研究还证明了125 mg/m2白蛋白紫杉醇在亚洲患者中的有效性和安全性。

 

原始出处:

Xie Y, Gong C, Zhang J, Wang L, Cao J, Tao Z, Li T, Zhao Y, Li Y, Hu S, Wang B, Hu X. Phase II trail of nab-paclitaxel in metastatic breast cancer patients with visceral metastases. BMC Cancer. 2021 Nov 2;21(1):1174. doi: 10.1186/s12885-021-08921-2. PMID: 34727875; PMCID: PMC8565069.

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    2021-12-17 珙桐
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