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1月14日消息 - 环球医学据悉,一项荷兰的研究表明,当患有KRAS基因突变的非小细胞肺癌(NSCLC)患者接受靶向药物索拉非尼(多吉美)治疗时,超过一半的患者对治疗有部分反应或病情得以稳定。
总体而言,在接受多激酶抑制剂治疗期间,57例患者中有30例(53%)患者的病情至少在6周内未发生恶化。患者的中位无进展生存期(PFS)为2.3个月,而其中位总生存期为5.3个月。
“索拉非尼在发生了KRAS基因突变的患者身上显示出了相关临床活性,而且有必要进一步对该药物进行临床调查,”阿姆斯特丹VU大学医学中心的医学博士Wouter W. Mellema在肺癌分子起源联合会议上说。
然而,Mellema在会上发布的一份新闻稿中描述了不能令人满意结果。II期临床试验的结果与I期研究的结果不符,该I期研究显示,3例患者对治疗有部分反应,5例有轻微反应,而10例患有KRAS基因阳性NSCLC的患者的中位PFS为3.0个月(Thorac Oncol 2010; 5: 719-720)。
“我们预计,[在II期研究中]无进展生存期和总生存期将会更好。”Mellema说。
尽管低于预期,这项研究还是达到主要终点,即大多数患者的病情至少在6个月内未恶化。因此,对索拉非尼的研究还将继续进行。
大约1/4的NSCLC肿瘤含有KRAS基因突变,这说明患者的预后较差,并且可能对表皮生长因子受体(EGFR)抑制剂有抗药性。Mellema指出,尚无关于KRAS基因阳性肿瘤患者治疗标准的共识。
索拉非尼是一种多靶位酪氨酸激酶抑制剂,具有Ras-Raf信号通路中的活性,这表明该药可能在治疗KRAS基因阳性NSCLC中发挥了作用。
索拉非尼单药I期试验结果有利,随后研究人员进行II期临床评估。纳入标准包括:活检证明存在KRAS基因突变;在接受含有一种或一种以上铂类方案治疗期间疾病发生恶化。
患者接受索拉非尼400 mg bid治疗,直到疾病恶化或产生不可接受的毒性。主要终点是疾病至少六周内未恶化。次要终点包括治疗反应持续的时间、PFS、总生存期和治疗相关的毒性。
最终的分析包括57例患者。六周后的结果包括,5例患者有部分反应,25例患者病情稳定,而27例患者的病情发生了恶化。
中位治疗时间为9周,中位治疗反应时间为32周(范围:5周~58周)。
最常见的不良事件是疲劳(6.4%)、手足综合征(5.7%)、呼吸困难(5.6%)、厌食(3.7%)和咳嗽(3.6%)。
患者发生了3-4级的毒性反应,包括5例3级皮肤毒性、4例3级胃肠道毒性,还有1例患者同时发生了3级代谢异常和3级肺炎。
Mellema表示,KRAS基因突变可能会通过多个信号通路刺激癌细胞,从而影响早期疾病的恶化。一些通路与疾病的恶化有关,而今后的临床评估将侧重于提供了抑制这种通路的治疗策略。
(环球医学)
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个人公众号:treeofhope
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共5条精彩回复,最后回复于 2016-11-1 21:23
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http://www.sciencedaily.com/releases/2012/01/120109211821.htm
Patients with lung cancer and a KRAS mutation are believed to have a poor prognosis and may not benefit from treatment with epidermal growth factor receptor tyrosine kinase inhibitors, according to study author Wouter W. Mellema, M.D., a doctoral candidate at VU University Medical Center in Amsterdam.
"There is a great need for targeted treatment options for patients with non-small cell lung cancer (NSCLC) with a KRAS mutation," he said.
In the phase 2, multicenter study conducted in the Netherlands, researchers assigned 57 patients with NSCLC and a KRAS mutation to 400 mg of sorafenib twice daily.
At six weeks, Mellema and colleagues reported a rate of no progression of 52.6 percent. Fifteen patients stopped treatment before six weeks -- 10 of whom stopped due to clinical progression. Median progression-free survival was 2.3 months, and median overall survival was 5.3 months. The researchers reported that 14 patients are still alive.
"Sorafenib could be a useful drug in this patient population by inhibiting the growth-stimulating signal of the RAS protein," Mellema said. "However, although sorafenib showed relevant activity, the outcome was unsatisfactory."
Mellema and his team had conducted a pilot study in 10 patients, which showed "very promising results. Unfortunately, the results of the phase 2 study were less optimistic. We expected that progression-free survival and overall survival would be better [in the phase 2 study]," Mellema said.
He suggested that the KRAS mutation causes early progression by stimulating cell growth through an alternative pathway. "Future studies currently in preparation in our group should focus on simultaneous inhibition of these pathways," he said. |
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个人公众号:treeofhope
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[LV.2]与爱新人
real 发表于 2016-8-29 12:31
我家人就在用这个,
你好!你家是怎样用的呢?效果怎样? |
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