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JCO:血检或能检出经性传播的喉癌

2013-07-11 zz_76 dxy

来自美国国立癌症研究所和国际癌症研究署的研究人员在《临床肿瘤学杂志》上报告道,在癌症症状显露前几年,血检就可检出引起喉癌和口腔癌的HPV抗体。研究显示,口咽癌患者具有HPV(人类乳头瘤病毒)抗体的比例接近1/3,而无癌患者的比例则低于1/100。目前,在该病发病前几年就可发现这些抗体。这些结果表明,通过血检当天就可发现患有该类癌症的患者。 过去认为大多数口咽癌是由抽烟和喝酒而不是由HPV

来自美国国立癌症研究所和国际癌症研究署的研究人员在《临床肿瘤学杂志》上报告道,在癌症症状显露前几年,血检就可检出引起喉癌和口腔癌的HPV抗体。研究显示,口咽癌患者具有HPV(人类乳头瘤病毒)抗体的比例接近1/3,而无癌患者的比例则低于1/100。目前,在该病发病前几年就可发现这些抗体。这些结果表明,通过血检当天就可发现患有该类癌症的患者。

过去认为大多数口咽癌是由抽烟和喝酒而不是由HPV感染引起的。然而,该恶性肿瘤在世界某些区域,尤其是欧美国家,越来越普遍,这是因为HPV 16型感染呈上升趋势。

目前全美口腔癌患者中,约有60%是由于HPV 16型感染而引起。持续性感染HPV 16可导致细胞发生变化,进而引起癌症。另外,HPV E6是众多病毒基因中的一种,作用是促进肿瘤形成。对与HPV相关的口咽癌患者进行的早期研究,在这些患者的血液中发现了E6抗体。

NCI癌症流行病学和遗传学部首席研究员Aimee R. Kreimer博士说:“我们的研究不仅表明了在诊断前就存在E6抗体,而且也表明在许多情况下,早在该癌症表现出明显的临床症状10多年前,这些抗体就存在,是成功筛查肿瘤标志物的一个重要特征”。

Kreimer和其团队测试了来自欧洲癌症与营养前瞻性调查研究的受试者,该调查研究是纳入了10个欧洲国家的50多万名健康成人受试者的一项长期研究。对那些在1~13后形成口咽癌的135例患者,及未形成口咽癌的1600例受试者,研究人员都进行了血检。

HPV16 E6抗体可改善生存率

他们发现在35%癌症患者中存在抗HPV16 E6蛋白抗体,而这些抗体在无癌人群中的比例则不到1%。虽然血样是在诊断前6年采集,但这种关系与诊断和采血间的时间间隔无关。在诊断前10多年采集的血样中也发现了HPV16 E6蛋白抗体。研究人员记录道,HPV16 E6抗体可能是改善生存率的一种生物标志物,这与之前的报告相一致。

本研究中,相比于那些在诊断前HPV16 E6抗体测试为阴性的口咽癌受试者,有70%在诊断前为阳性的口咽癌受试者更有可能在随访后存活下来。

IARC的首席研究员Paul Brennan博士总结道:“虽然前景光明,但这些研究结果应视为初步结果。如HPV16 E6 抗体的预测能力得到其他研究的支持,则我们可以考虑基于该结果来开发一种筛查方法”。名人迈克尔·道格拉斯近日宣布,其4期喉癌是由口交而非饮酒和吸烟引起。


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    2014-04-07 lidong40
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    2013-07-13 Luyuxie_11

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