Nat Commun:胰腺囊肿恶化的基因组学表征

2020-09-04 QQY MedSci原创

胰腺癌是一种致命的且预后较差的疾病,和其他上皮恶性肿瘤一样的是,胰腺癌是由无创性癌前病变所引起,如果能够及早发现并治疗则可以治愈。

胰腺癌是一种致命的且预后较差的疾病,和其他上皮恶性肿瘤一样的是,胰腺癌是由无创性癌前病变所引起,如果能够及早发现并治疗则可以治愈。


尽管大多数的胰腺癌被认为起源于微小的癌前病变(上皮内瘤变,PanIN),但目前的成像技术仅能检测到一些较大的囊肿,包括导管内乳头状粘液瘤(IPMN)和粘液性囊肿(MCN),这也为预防浸润性胰腺癌提供了一定的贡献。但由于对这些肿瘤的发生发展尚不清楚,因此迫切需要了解浸润性肿瘤发生发展的相关分子机制以及潜在的生物标记物,以更好的鉴定出具有成癌高风险的需要临床干预的囊肿。

该研究通过全外显子组或靶向测序分析来自18例患者的IPMN、MCN和小型相关浸润癌的总共148个样本。进化分析显示IPMNs和MCNs都是胰腺癌的直接前体。

研究人员发现SMAD4和TGFBR2突变通常仅发生在浸润性癌中,而RNF43突变则主要发生在非浸润性病变中。基因组学分析显示,高度非典型增生和胰腺癌发生之间的平均时间间隔为三年以上。

综上研究结果表明,非浸润性IPMN和MCN是浸润性胰腺癌的起源,确定了潜在的浸润驱动因素,揭示了肿瘤恶性转化之前的复杂克隆动态过程,并为癌症的早期发现和干预提供数据支持。


原始出处:

Noe, M., Niknafs, N., Fischer, C.G. et al. Genomic characterization of malignant progression in neoplastic pancreatic cysts. Nat Commun 11, 4085 (14 August 2020).

 

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    2021-08-18 liuli5079
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    2021-01-06 liye789132251
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    2020-09-04 ms7000000139248197

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