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Brain tumor classification from FFPE samples using nanopore methylation sequencing

delete2025-12-01
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OA
AI
G
Galina Feinberg‐Gorenshtein
A
Assaf Grunwald
C
Carlo Vermeulen
N
Nurit Gal Mark
E
Elena Shinderman-Maman
A
Adva Levy‐Barda
K
Keren Shichrur
M
Michal Hameiri‐Grossman
O
Orli Michaeli
S
Shira Amar
S
Suzanna Fichman
A
Abraham Natan
T
Tali Siegal
S
Shlomit Yust-Katz
H
Hanna Weiss
O
Osnat Konen
A
Amir Kershenovich
A
Andrew A. Kanner
J
Jeroen de Ridder
H
Helen Toledano
S
Shai Izraeli
Y
Yehudit Birger *
Y
Yuval Ebenstein *
DOI:10.1093/narcan/zcaf038delete
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摘要

摘要

En 中文
基于Oxford Nanopore Technology(ONT)的甲基化测序正作为一种强大的方法兴起,用于快速准确地分类脑肿瘤,这是精准肿瘤学的一个关键组成部分。然而,其更广泛的临床应用因依赖新鲜冷冻(FF)组织而受到限制,而绝大多数临床标本是福尔马林固定石蜡包埋(FFPE)。本研究通过评估FFPE处理对DNA甲基化谱的影响,并引入一种经过验证的协议,用于直接从染色FFPE载玻片上的病理标记区域提取DNA进行ONT分类,从而解决了这一局限性。该方法能够在组织学评估后靶向选择肿瘤富集区域,从而提高DNA输入质量和肿瘤含量。我们证明,即使是很小的低输入样本(≥25 ng)也能通过此方法成功分类,与最终整合的神经病理学诊断高度一致。结果表明,尽管福尔马林固定会导致一定的甲基化损失,但分类性能依然稳健。值得注意的是,我们发现甲基化降解与固定时间之间存在相关性,支持在可能的情况下将福尔马林暴露时间限制在≤3-4天的建议。通过使常规处理、染色的FFPE组织能够进行准确的甲基化基础肿瘤分类,我们的协议能够无缝集成到现有的临床工作流程中。这扩大了ONT诊断的适用性,并支持在组织量极少或临床需求紧急的情况下也能做出及时、明智的治疗决策。
Keyword:
CENTRAL-NERVOUS-SYSTEM
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期刊

N
NAR Cancer
IF:
3.2
论文数:
343
被引数:
807

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R
Rabin Medical Center
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Utrecht University
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tel aviv university
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