Front Oncol:世界首例,唾液筛查检出早期癌症!

2020-05-21 燕小六​ 医学界

唾液筛出早期口咽癌,或将成为可能。

唾液筛出早期口咽癌,或将成为可能。

5月19日,美国专业医学网站Medscape报道,澳大利亚生物科学家研发一套唾液试剂,并利用它,从一名“无任何症状的健康人”身上,成功检出早期喉癌。经过15分钟手术切除,该名患者已治愈。

相关内容以“病例报告”的形式,发表于Frontiers in Oncology杂志。

“这是世界首个口咽癌(OPC)非侵入性筛检研究。其思路是,从受试者的唾液样本中,识别人类乳头瘤病毒(HPV)-16 DNA。若它能在更大范围的健康人群中进行研究,并得到验证,那我们或距离推广口咽癌常规筛查,又近了一步。”Medscape评论。

持续36个月的唾液检测显示HPV阳性……

持续HPV感染已经成为口咽癌的主要诱因之一。

2020年1月,《新英格兰医学杂志》发表综述称,高危基因型HPV-16引起或与HPV相关的口咽癌病例,在逐年增加。在美国,被诊断为HPV阳性口咽癌的比例,从1980年代的16.3%,升至2000年代的72.7%以上。

“我们的研究发现,口咽癌患者的HPV-16 DNA可能直接脱落到唾液中,或可作为早期诊断的生物标志物。”通讯作者Chamindie Punyadeera,澳大利亚昆士兰科技大学健康与生物医药创新研究所副教授,如是说。

据悉,2016年5月-2017年10月,Chamindie Punyadeera所在的生物科学学院唾液和体液活检转化研究团队,携手多家医疗机构,招募665名健康人入组,开始进行口腔HPV-16 DNA流行病学研究。

所有受试者按要求,留下漱口水样本。采样和分析的标准流程是:受试者使用特定浓度的口服盐溶液,漱口1-2分钟,然后在试管里留样。团队采用自主研发的试剂,对样本进行病毒基因型和病毒载量分析。

结果显示,有3名受试者为持续性HPV-16 DNA阳性。其中,1名63岁的白人男性,在参试第6个月、第12个月和第36个月,HPV-16 病毒载量不断上升。从最初的3.43拷贝/50ng,增至第36个月时的1281.69拷贝/50ng。

在研究小组的邀请及研究伦理委员会监督下,该男子应邀参加耳鼻喉科临床评估和讨论。

“15年前,他成功戒烟,但此前有45年烟龄。他每天会喝点儿酒,差不多2杯。是个异性恋,至少有5名性伴侣。口腔性接触是惯常的前戏。

最初的口咽临床检查——包括触诊和白光——并未发现明显异常。电子鼻咽喉镜显示,两个扁桃体略不对称(左<右),左侧舌扁桃体沟有轻度血管变化,但无任何恶性病变的证据。此外,口咽和颈部的MRI未发现扁桃体或舌根隐匿性病变,也没有颈部淋巴结肿大。”这些讨论细节都被记录在“病例报告”中。

获得该男子的知情同意后,研究团队对其进行双侧扁桃体切除治疗。手术仅耗时15分钟。患者于当天出院。

术后活检显示,其左侧扁桃体有直径为2mm的鳞状细胞癌。

术后2周,复查唾液没有找到HPV-16 DNA的阳性证据。术后2个月时,颈部超声检查未发现颈部淋巴结肿大。

“目前,该名男性正在接受术后随访。我们认为,他通过扁桃体切除这一小手术,即可获得治愈的可能,且复发率极低。”Chamindie Punyadeera说。


图B为术后左侧扁桃体组织切片发现2mm非角质化鳞状细胞癌,局灶性基质浸润<1mm,切缘清晰。/Frontiers in Oncology

HPV所致口咽癌,缺少常规筛查

研究团队表示,前文所述病例是世界首例,通过唾液筛查检出、再经组织病理学确诊的无症状隐性喉癌。对临床而言,它具有多方面意义。

首先,它提示临床,应充分评估唾液HPV-DNA升高,与口咽癌病程的关联。

过往已有研究证明,两者存在一定程度正相关。2016年,《美国医学会杂志》肿瘤学子刊曾发文称,对96650名受试者、平均随访4年后发现,口腔HPV-16阳性,会使口咽部鳞癌的风险增加22倍。其结论指出,简便的口腔漱口水样本收集,能为口咽部鳞癌风险,提供前瞻性“生物标记”。

而前文所述研究进一步发现,HPV病毒载量持续上升,或预示病程进展。

其次,口咽癌的明确诊断,目前仍主要为侵入性活检和基因组测序技术。尤其是HPV所致口咽癌,一直缺少标准或常规的筛查程序。

通常,患者只有在病情进展至晚期,出现明显症状时,才可能被检出。若可以实现唾液筛检,或将大幅推动口咽癌的早期筛查、早期治疗,患者也能获得更理想的预后。

再次,它提示,推广HPV疫苗广泛接种的重要性。

“20世纪80年代,得喉癌的多是70余岁老者,大多有酗酒或吸烟史。只有少数病例与HPV感染有关。但现在的喉癌病人往往是已身为人夫或人父的中年男子,经济条件较好,不吸烟也不酗酒。男性被确诊罹患HPV相关喉癌的几率,要比女性高三倍。”《纽约时报》称,导致这一现状得主要原因包括,人们更早开始性行为,拥有更多性伴侣,更多进行口腔性接触。

有研究显示,绝大多数HPV感染会在1-2年内,被人体免疫系统清除干净。而口腔性接触感染HPV,若没有被及时清除,或有10年-30年潜伏期。因此,接种HPV疫苗,或能预防口咽癌、降低发生率。但截至目前,相关预防作用仍缺乏数据支持。


2013年,影星迈克尔·道格拉斯被诊断为喉癌。《卫报》援引其发言称:“我不想多谈细节,这种癌症是由HPV感染引起的,而它源自口腔性接触。”/AP

“作为世界首个单一病例,本研究并不是支持普通人群进行唾液筛查HPV的直接证据。但它证明一种可行性,我们可以用低成本、非侵入性的方式,在高危人群中筛检HPV感染所致口咽癌,也能用这一方式评估治疗效果。”Chamindie Punyadeera表示。

原始出处:

Kai Dun Tang, Sarju Vasani, Touraj Taheri, et.al. An Occult HPV-Driven Oropharyngeal Squamous Cell Carcinoma Discovered Through a Saliva Test. Front. Oncol., 31 March 2020

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  5. [GetPortalCommentsPageByObjectIdResponse(id=1865837, encodeId=a41d186583eb3, content=<a href='/topic/show?id=16ce133504e' target=_blank style='color:#2F92EE;'>#Oncol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=21, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13350, encryptionId=16ce133504e, topicName=Oncol)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=b63894, createdName=minlingfeng, createdTime=Mon Jul 20 14:27:47 CST 2020, time=2020-07-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1968478, encodeId=982b19684e8e8, content=<a href='/topic/show?id=a57f208660f' target=_blank style='color:#2F92EE;'>#世界首例#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=20866, encryptionId=a57f208660f, topicName=世界首例)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=917c196, createdName=sjzlzc007, createdTime=Sun Jun 14 02:27:47 CST 2020, time=2020-06-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1769446, encodeId=d8081e6944673, content=<a href='/topic/show?id=0b055941e8a' target=_blank style='color:#2F92EE;'>#早期癌症#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=43, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=59417, encryptionId=0b055941e8a, topicName=早期癌症)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=3d7e38060742, createdName=klivis, createdTime=Mon Sep 07 02:27:47 CST 2020, time=2020-09-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1952464, encodeId=5cc81952464d0, content=<a href='/topic/show?id=fb5140038ac' target=_blank style='color:#2F92EE;'>#唾液筛查#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=40038, encryptionId=fb5140038ac, topicName=唾液筛查)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=3860283, createdName=whmdzju, createdTime=Wed Mar 10 21:27:47 CST 2021, time=2021-03-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=601615, encodeId=c6206016156f, content=有这个必要吗,, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20220519/c2ab253484ee4527a2d4e9589a4821ac/45de9bf494a54becb2ea4369c9d11e85.jpg, createdBy=7a3710, createdName=lovetcm, createdTime=Sat Jun 06 12:52:18 CST 2020, time=2020-06-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1038037, encodeId=83e3103803ecc, content=谢谢梅斯分享这么多精彩信息, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=anti-cancer, createdTime=Thu May 21 11:27:47 CST 2020, time=2020-05-21, status=1, ipAttribution=)]
    2020-06-06 lovetcm

    有这个必要吗,

    0

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    2020-05-21 anti-cancer

    谢谢梅斯分享这么多精彩信息

    0

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