JCO:HPV相关口咽癌的生物标志物被发现

2013-06-19 Alex 译 医学论坛网

     研究人员发现,人类乳头状瘤病毒抗体也许可以鉴别出哪些人患HPV-相关口咽癌的风险大大增加,口咽就是喉咙的一部分,包含扁桃体。   在他们的研究中,至少三分之一的口咽癌患者体内存在HPV抗体,而没有患癌症的人中少于一百分之一。目前,这些抗体可以在发病前很多年检测到。也许有一天验血可以用来鉴别这种癌症,这些发现提高了这种可能性。   这

  HPV

       研究人员发现,人类乳头状瘤病毒抗体也许可以鉴别出哪些人患HPV-相关口咽癌的风险大大增加,口咽就是喉咙的一部分,包含扁桃体。

  在他们的研究中,至少三分之一的口咽癌患者体内存在HPV抗体,而没有患癌症的人中少于一百分之一。目前,这些抗体可以在发病前很多年检测到。也许有一天验血可以用来鉴别这种癌症,这些发现提高了这种可能性。

  这项研究是由美国国家癌症研究所(NCI)的科学家开展的,与国际癌症研究机构(IARC)合作,结果发表在2013.6.17 Journal of Clinical Oncology.

  以前的观点认为,多数口咽癌可能与吸烟和饮酒有关,而不是HPV感染。然而,恶性肿瘤在世界的许多地方发生率都在增加,尤其是在美国和欧洲,因为感染人乳头状瘤病毒-16(HPV 16)的人在增加。在美国,据估计目前60%以上口咽癌患者是由于与HPV16感染有关。HPV16持续感染导致细胞发生变化,最终导致癌症。

  HPV E6是有助于肿瘤的形成的病毒基因。关于HPV相关口咽癌的以往研究发现,患者血液中存在E6抗体。

  “我们的研究不仅表明E6抗体可以在诊断前被检测到,在其许多情况下,一些抗体也可以在临床癌症诊断前超过十年可以检测到,这是筛选生物标志物的一个重要特征。”Aimee R. Kreimer博士说,他是NCI癌症流行病学和遗传学部的首席研究员。

  Kreimer和她的同事检测了参加人员的样品,他们参与了欧洲前瞻性癌症与营养研究,这是一项来自10个欧洲国家的超过500,000名健康人的长期研究。研究开始时抽取参与者的血液试样,因为它们的初始的贡献,之后一直跟踪研究。

  研究人员分析了135个在一年到13年间患有口咽癌的患者血液,也分析了1600个没有患上癌症的对照者血液。研究发现在35%癌症患者中可以检测到HPV16 E6蛋白抗体,而无癌症患者中检测率小于1%。血样平均在诊断前6年收集的,但血样收集和诊断之间的时间关系是独立的。HPV16 E6蛋白抗体甚至可以在诊断前10年在血液中发现。

  科学家指出,HPV16 E6抗体或成为提升生存几率的生物指标,这与之前所报导的研究结果一致。研究显示,与HPV16 E6 抗体检测呈阴性的口咽癌患者相比,在整个随访过程中,确诊口咽癌前HPV16 E6抗体检测结果阳性的患者生存率要高70%。

  国际癌症研究机构(IARC)的首席研究员Paul Brennan博士说:“尽管看似很有前景,但这些发现仍应被看作只是初步的断定。如果在其他的研究中HPV16 E6抗体的作用仍能保持这种体现,我们或可考虑为其建立一个筛查工具。

Scientists find promising biomarker for predicting HPV-related oropharynx cancer
Researchers have found that antibodies against the human papillomavirus (HPV) may help identify individuals who are at greatly increased risk of HPV-related cancer of the oropharynx, which is a portion of the throat that contains the tonsils....

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    2013-10-29 lidong40
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JNCI:人乳头状瘤病毒(HPV)16感染增加口腔癌风险

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AM J EPIDEMIOL:含咖啡因的咖啡可降低口腔癌风险

  美国癌症协会近期一项研究显示,含咖啡因的咖啡与口腔癌/咽喉癌的死亡率之间存在明显的逆相关性。研究人员介绍称,每天饮用含咖啡因的咖啡超过4杯可使人们因口腔癌而死亡的风险比很少喝或不喝咖啡的人们的风险低将近一半。这一研究结果被刊登在《美国流行病学杂志》网站上。研究人员表示,相关作用的生物学机制有待更多的研究来进一步证实。   先前的一些流行病学研究已经表明,咖啡可使口腔癌/咽喉癌的风险降低。为了